Display device and method for manufacturing display device

Abstract

The present invention increases the brightness of a display device in a direction in which the display device is visually recognized. A display device (1) is provided with: a light-emitting substrate (10) having a semiconductor layer (11) divided into unit regions (10a), and light-emitting sections (13) disposed in a plurality of the unit regions (10a); and an optical sheet (20). The optical sheet (20) has a plurality of unit lenses (21). The plurality of unit regions (10a) are arranged in a first direction and a second direction. When w / p is less than 0.025, at least one of the following conditions is satisfied: r / p is 0.2 or more and less than 0.525, and formula (1) is satisfied; r / p is at least 0.525 and less than 1.5 and satisfies formula (2); r / p is 0.2 or more and less than 0.525 and satisfies formula (3); r / p is at least 0.525 and less than 0.725 and satisfies formula (4); and r / p is 0.725 or more and less than 1.5, and satisfies formula (5).

Description

Technical Field

[0001] The present disclosure relates to a display device and a method for manufacturing the display device. Background Art

[0002] In recent years, display devices equipped with multiple light-emitting parts, especially display devices equipped with LEDs, so-called LED displays, have become known. In particular, display devices that use semiconductors formed with multiple tiny light-emitting diodes (LEDs) or wiring directly as light-emitting substrates, so-called micro-LED displays, are being developed. Micro-LED displays have attracted attention as small, lightweight and thin displays. In addition, organic EL (OLED) displays equipped with organic EL elements are known.

[0003] In addition, in the above-mentioned display device, especially the micro LED display, since the light emitted from the light emitting diode is diffuse light, there is a problem that the light cannot be used efficiently. In order to solve such a problem, for example, in Patent Document 1, such a micro LED display is disclosed: by providing a linear array lens on the side where the light is emitted, the light is focused in a specific direction, such as the front direction. By focusing the light in a specific direction, the light emitted from the LED can be used efficiently.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2019-197133 Summary of the invention

[0007] In a display device, it is required to increase the brightness in the direction in which the user is assumed to visually recognize the display device by more than a certain degree. In order to efficiently utilize light and at the same time, in particular, to increase the brightness in the direction in which the user is assumed to visually recognize the display device, it is sometimes required to focus light in that direction to increase the brightness in that direction. On the other hand, it is also assumed that the user visually recognizes the display device from a direction deviating from this direction, and thus, it is sometimes required to increase the brightness in the direction deviating from this direction by more than a certain degree. For example, in the case where the display device is used in a head-up display (HUD), in particular, in the case of a head-up display that projects an image on the windshield of a car, it is sometimes required to increase the brightness in that direction and also increase the brightness in the direction deviating from this direction.

[0008] The present invention has been made in consideration of such a problem, and an object of the present invention is to increase the brightness in the direction in which a display device is visually recognized.

[0009] A first aspect of the present disclosure is a display device, wherein:

[0010] The display device comprises:

[0011] A light-emitting substrate including a semiconductor layer divided into a plurality of unit regions and light-emitting portions arranged in the plurality of unit regions; and

[0012] an optical sheet disposed opposite to the light-emitting substrate,

[0013] The optical sheet has a plurality of unit lenses, the plurality of unit lenses are arranged in a first direction and extend in a second direction that is not parallel to the first direction.

[0014] The plurality of unit regions are arranged in the first direction and the second direction,

[0015] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is less than 0.025, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (1); r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (2); r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (3); r / p is greater than or equal to 0.525 and less than 0.725 and satisfies the following formula (4); and r / p is greater than or equal to 0.725 and less than 1.5 and satisfies the following formula (5),

[0016] or

[0017] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.025 and less than 0.075, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (6); r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (7); r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (8); r / p is greater than or equal to 0.525 and less than 0.725 and satisfies the following formula (9); and r / p is greater than or equal to 0.725 and less than 1.5 and satisfies the following formula (10),

[0018] or

[0019] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.075 and less than 0.15, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.375 and satisfies the following formula (11); r / p is greater than or equal to 0.375 and less than 1.5 and satisfies the following formula (12); r / p is greater than or equal to 0.2 and less than 0.725 and satisfies the following formula (13); and r / p is greater than or equal to 0.725 and less than 1.5 and satisfies the following formula (14),

[0020] or

[0021] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.15 and less than 0.25, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.725 and satisfies the following formula (15); r / p is greater than or equal to 0.725 and less than 1.5 and satisfies the following formula (16); and r / p is greater than or equal to 0.2 and less than 1.5 and satisfies the following formula (17),

[0022] or

[0023] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.25 and less than 0.35, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.25 and less than 0.975 and satisfies the following formula (18); and r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (19),

[0024] or

[0025] Let the pitch of the light-emitting portion in the first direction be p, let the width of the light-emitting portion in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.35 and less than 0.45, and r / p is greater than or equal to 0.3 and less than 1.5 and satisfies the following formula (20),

[0026] or

[0027] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.45 and less than 0.55, and r / p is greater than or equal to 0.4 and less than 1.5 and satisfies the following formula (21),

[0028] or

[0029] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.55 and less than 0.65, and r / p is greater than or equal to 0.45 and less than 1.5 and satisfies the following formula (22),

[0030] [Number 1]

[0031] 1.18×r / p-0.29≤d / p≤1.36×r / p-0.05…Formula (1)

[0032] 1.18×r / p-0.29≤d / p≤2.08×r / p-0.15…Formula (2)

[0033] 2.43×r / p+0.05≤d / p≤4.64×r / p-0.3…Formula (3)

[0034] 4.5×r / p-0.85≤d / p≤4.64×r / p-0.3…Formula (4)

[0035] 4.5×r / p-0.85≤d / p≤1.2×r / p+2.46…Formula (5)

[0036] 1.18×r / p-0.29≤d / p≤1.36×r / p…Formula (6)

[0037] 1.18×r / p-0.29≤d / p≤2.05×r / p-0.03…Formula (7)

[0038] 2.57×r / p-0.01≤d / p≤4.65×r / p-0.3…Formula (8)

[0039] 4.67×r / p-0.98≤d / p≤4.65×r / p-0.3…Formula (9)

[0040] 4.67×r / p-0.98≤d / p≤1.2×r / p+2.46…Formula (10)

[0041] 1.18×r / p-0.29≤d / p≤4×r / p-0.1…Formula (11)

[0042] 1.18×r / p-0.29≤d / p≤2.17×r / p-0.19…Formula (12)

[0043] 4.79×r / p-1.09≤d / p≤5.07×r / p-0.58…Formula (13)

[0044] 4.79×r / p-1.09≤d / p≤1.8×r / p1.94…Formula (14)

[0045] 1.18×r / p-0.29≤d / p≤4.84×r / p-0.45…Formula (15)

[0046] 1.18×r / p-0.29≤d / p≤1.69×r / p+0.6…Formula (16)

[0047] 5.6×r / p-1.84≤d / p≤1.8×r / p+1.94…Formula (17)

[0048] 1.22×r / p-0.33≤d / p≤4.55×r / p-0.42…Formula (18)

[0049] 1.22×r / p-0.33≤d / p≤1.04×r / p+1.78…Formula (19)

[0050] 1.26×r / p-0.37≤d / p≤5.56×r / p-1.01…Formula (20)

[0051] 1.28×r / p-0.39≤d / p≤5.83×r / p-1.29…Formula (21)

[0052] 1.38×r / p-0.45≤d / p≤5.8×r / p-1.48…Formula (22).

[0053] A second aspect of the present disclosure is a display device, wherein:

[0054] The display device comprises:

[0055] A light-emitting substrate including a semiconductor layer divided into a plurality of unit regions and light-emitting portions arranged in the plurality of unit regions; and

[0056] an optical sheet disposed opposite to the light-emitting substrate,

[0057] The optical sheet has a plurality of unit lenses, the plurality of unit lenses are arranged in a first direction and extend in a second direction that is not parallel to the first direction.

[0058] The plurality of unit regions are arranged in the first direction and the second direction,

[0059] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is less than 0.025, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (23); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (24),

[0060] or

[0061] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.025 and less than 0.15, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (25); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (26),

[0062] or

[0063] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.15 and less than 0.25, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (27); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (28),

[0064] or

[0065] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.25 and less than 0.35, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.25 and less than 0.425 and satisfies the following formula (29); and r / p is greater than or equal to 0.425 and less than 1.5 and satisfies the following formula (30),

[0066] or

[0067] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.35 and less than 0.45, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.3 and less than 0.525 and satisfies the following formula (31); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (32),

[0068] or

[0069] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.45 and less than 0.55, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.4 and less than 0.625 and satisfies the following formula (33); and r / p is greater than or equal to 0.625 and less than 1.5 and satisfies the following formula (34),

[0070] or

[0071] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.55 and less than 0.65, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.45 and less than 0.625 and satisfies the following formula (35); and r / p is greater than or equal to 0.625 and less than 1.5 and satisfies the following formula (36),

[0072] [Number 2]

[0073] 1.18×r / p-0.29≤d / p≤1×r / p-0.02…Formula (23)

[0074] 1.18×r / p-0.29≤d / p≤1.32×r / p+0.15…Formula (24)

[0075] 1.18×r / p-0.29≤d / p≤1.14×r / p-0.04…Formula (25)

[0076] 1.18×r / p-0.29≤d / p≤1.3×r / p+0.18…Formula (26)

[0077] 1.18×r / p-0.29≤d / p≤-0.29×r / p+0.73…Formula (27)

[0078] 1.18×r / p-0.29≤d / p≤1.29×r / p+0.28…Formula (28)

[0079] 1.22×r / p-0.33≤d / p≤4.6×r / p-0.52…Formula (29)

[0080] 1.22×r / p-0.33≤d / p≤1.23×r / p+0.38…Formula (30)

[0081] 1.26×r / p-0.37≤d / p≤5.4×r / p-0.96…Formula (31)

[0082] 1.26×r / p-0.37≤d / p≤0.77×r / p+1.08…Formula (32)

[0083] 1.28×r / p-0.39≤d / p≤5.83×r / p-1.29…Formula (33)

[0084] 1.28×r / p-0.39≤d / p≤0.4×r / p+1.77…Formula (34)

[0085] 1.38×r / p-0.45≤d / p≤7.6×r / p-2.44…Formula (35)

[0086] 1.38×r / p-0.45≤d / p≤0.26×r / p+2.29…Formula (36).

[0087] A third aspect of the present disclosure is a display device, wherein:

[0088] The display device comprises:

[0089] A light-emitting substrate including a semiconductor layer divided into a plurality of unit regions and light-emitting portions arranged in the plurality of unit regions; and

[0090] an optical sheet disposed opposite to the light-emitting substrate,

[0091] The optical sheet has a plurality of unit lenses, the plurality of unit lenses are arranged in a first direction and extend in a second direction that is not parallel to the first direction.

[0092] The plurality of unit regions are arranged in the first direction and the second direction,

[0093] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.01 and less than 0.05, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (37); r / p is greater than or equal to 0.525 and less than 0.975 and satisfies the following formula (38); r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (39); r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (40); and r / p is greater than or equal to 0.525 and less than 0.975 and satisfies the following formula (41),

[0094] or

[0095] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.05 and less than 0.1, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (42); r / p is greater than or equal to 0.525 and less than 0.975 and satisfies the following formula (43); r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (44); r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (45); and r / p is greater than or equal to 0.525 and less than 0.975 and satisfies the following formula (46),

[0096] or

[0097] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.1 and less than 0.2, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.375 and satisfies the following formula (47); r / p is greater than or equal to 0.375 and less than 0.975 and satisfies the following formula (48); r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (49); and r / p is greater than or equal to 0.375 and less than 0.975 and satisfies the following formula (50),

[0098] or

[0099] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.2 and less than 0.3, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.25 and less than 0.725 and satisfies the following formula (51); r / p is greater than or equal to 0.725 and less than 0.975 and satisfies the following formula (52); r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (53); and r / p is greater than or equal to 0.725 and less than 0.975 and satisfies the following formula (54),

[0100] or

[0101] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.3 and less than 0.4, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.35 and less than 0.975 and satisfies the following formula (55); and r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (56),

[0102] or

[0103] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.4 and less than 0.5, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.4 and less than 0.675 and satisfies the following formula (57); and r / p is greater than or equal to 0.675 and less than 1.5 and satisfies the following formula (58),

[0104] or

[0105] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.5 and less than 0.6, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.5 and less than 0.675 and satisfies the following formula (59); and r / p is greater than or equal to 0.675 and less than 1.5 and satisfies the following formula (60),

[0106] [Number 3]

[0107] 0.21×r / p+0.01≤d / p≤1×r / p-0.02…Formula (37)

[0108] 1.4×r / p-0.45≤d / p≤2.23×r / p-0.4…Formula (38)

[0109] 1.09×r / p-0.18≤d / p≤1.53×r / p+0.3…Formula (39)

[0110] 2.43×r / p+0.05≤d / p≤3.57×r / p-0.21…Formula (40)

[0111] 4.57×r / p-0.89≤d / p≤4×r / p-0.3…Formula (41)

[0112] 0.21×r / p+0.01≤d / p≤0.79×r / p+0.11…Formula (42)

[0113] 1.4×r / p-0.45≤d / p≤2.23×r / p-0.4…Formula (43)

[0114] 1.09×r / p-0.18≤d / p≤1.56×r / p+0.27…Formula (44)

[0115] 2.57×r / p-0.01≤d / p≤3.43×r / p-0.17…Formula (45)

[0116] 4.77×r / p-1.04≤d / p≤4.13×r / p-0.41…Formula (46)

[0117] 0.6×r / p-0.09≤d / p≤4×r / p-0.4…Formula (47)

[0118] 1.53×r / p-0.56≤d / p≤2.27×r / p-0.35…Formula (48)

[0119] 1.09×r / p-0.18≤d / p≤1.56×r / p+0.28…Formula (49)

[0120] 4.79×r / p-1.09≤d / p≤4.41×r / p-0.64…Formula (50)

[0121] 1.03×r / p-0.26≤d / p≤4.39×r / p-0.64…Formula (51)

[0122] 1.4×r / p-0.45≤d / p≤0.4×r / p+1.58…Formula (52)

[0123] 1.15×r / p-0.24≤d / p≤1.49×r / p+0.54…Formula (53)

[0124] 5.6×r / p-1.84≤d / p≤4×r / p-0.3…Formula (54)

[0125] 1.45×r / p-0.5≤d / p≤4 / 45×r / p-0.77…Formula (55)

[0126] 1.16×r / p-0.25≤d / p≤0.35×r / p+2.51…Formula (56)

[0127] 1.77×r / p-0.68≤d / p≤5.43×r / p-1.43…Formula (57)

[0128] 1.13×r / p-0.22≤d / p≤3.23×r / p+0.13…Formula (58)

[0129] 2.6×r / p-1.17≤d / p≤6.6×r / p-2.27…Formula (59)

[0130] 1.27×r / p-0.33≤d / p≤3.3×r / p-0.06…Formula (60).

[0131] A fourth aspect of the present disclosure is a display device, wherein:

[0132] The display device comprises:

[0133] A light-emitting substrate including a semiconductor layer divided into a plurality of unit regions and light-emitting portions arranged in the plurality of unit regions; and

[0134] an optical sheet disposed opposite to the light-emitting substrate,

[0135] The optical sheet has a plurality of unit lenses, the plurality of unit lenses are arranged in a first direction and extend in a second direction that is not parallel to the first direction.

[0136] The plurality of unit regions are arranged in the first direction and the second direction,

[0137] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.01 and less than 0.05, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (61); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (62),

[0138] or

[0139] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.05 and less than 0.1, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (63); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (64),

[0140] or

[0141] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.1 and less than 0.2, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (65); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (66),

[0142] or

[0143] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.2 and less than 0.3, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.25 and less than 0.525 and satisfies the following formula (67); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (68),

[0144] or

[0145] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.3 and less than 0.4, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.35 and less than 0.675 and satisfies the following formula (69); and r / p is greater than or equal to 0.675 and less than 1.5 and satisfies the following formula (70),

[0146] or

[0147] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.4 and less than 0.5, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.4 and less than 0.675 and satisfies the following formula (71); and r / p is greater than or equal to 0.675 and less than 1.5 and satisfies the following formula (72),

[0148] or

[0149] Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.5 and less than 0.6, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.5 and less than 0.675 and satisfies the following formula (73); and r / p is greater than or equal to 0.675 and less than 1.5 and satisfies the following formula (74),

[0150] [Number 4]

[0151] 0.21×r / p+0.02≤d / p≤1×r / p-0.08…Formula (61)

[0152] 1.17×r / p-0.28≤d / p≤1.26×r / p+0.13…Formula (62)

[0153] 0.21×r / p+0.02≤d / p≤1×r / p-0.08…Formula (63)

[0154] 1.17×r / p-0.28≤d / p≤1.26×r / p+0.14…Formula (64)

[0155] 0.21×r / p+0.01≤d / p≤0.71×r / p+0.05…Formula (65)

[0156] 1.17×r / p-0.28≤d / p≤1.26×r / p+0.14…Formula (66)

[0157] 0.29×r / p-0.05≤d / p≤-0.23×r / p+0.62…Formula (67)

[0158] 1.2×r / p-0.3≤d / p≤1.2×r / p+0.21…Formula (68)

[0159] 1.43×r / p-0.49≤d / p≤1.07×r / p+0.45…Formula (69)

[0160] 1.19×r / p-0.28≤d / p≤1×r / p+0.5…Formula (70)

[0161] 1.77×r / p-0.68≤d / p≤2.86×r / p0.23…Formula (71)

[0162] 1.15×r / p-0.23≤d / p≤0.64×r / p+1.13…Formula (72)

[0163] 2.6×r / p-1.17≤d / p≤6.6×r / p-2.27…Formula (73)

[0164] 1.27×r / p-0.33≤d / p≤0.35×r / p+1.78…Formula (74).

[0165] The fifth mode of the present disclosure may be that in each of the display devices of the above-mentioned first mode to the above-mentioned fourth mode, when observed from the normal direction of the plate surface of the light-emitting substrate, one of the unit lenses corresponds to one of the second direction columns of unit areas formed by the plurality of unit areas arranged in the second direction.

[0166] The sixth mode of the present disclosure may be that, in the display device of the above-mentioned fifth mode, when observed from the normal direction of the plate surface of the light-emitting substrate, the center of one of the unit lenses in the first direction is offset from the center of the light-emitting portion of the unit area in the second direction column constituting the corresponding unit area in the second direction column.

[0167] A seventh aspect of the present disclosure may be that in each of the display devices of the first aspect to the fourth aspect, the optical sheet has a first surface facing the light-emitting substrate and a second surface located on the opposite side of the first surface,

[0168] The display device further includes a light deflecting layer that faces the second surface of the optical sheet and deflects light from the optical sheet so that a traveling direction of light changes when observed from the second direction.

[0169] An eighth aspect of the present disclosure may be that in each of the display devices of the first aspect to the seventh aspect, the optical sheet has a first surface facing the light-emitting substrate and a second surface located on the opposite side of the first surface,

[0170] The display device further includes a light angle adjustment layer, which is located on the second surface side of the optical sheet and adjusts an angle of a traveling direction of light from the optical sheet with respect to a normal direction of a plate surface of the light emitting substrate.

[0171] A ninth aspect of the present disclosure may be that, in each of the display devices of the first aspect to the eighth aspect, the light-emitting substrate includes a first light-emitting portion and a second light-emitting portion that emits light of a wavelength different from that of the first light-emitting portion as the light-emitting portion.

[0172] The 10th embodiment of the present disclosure may be that, in the display device of the above-mentioned 1st embodiment or the above-mentioned 3rd embodiment, the minimum value m of the brightness within the range of an angle of greater than -5° and less than +5° relative to the focusing direction of the optical sheet is greater than 50% of the maximum value M of the brightness within the range of greater than -5° and less than +5° relative to the focusing direction of the optical sheet.

[0173] The 11th embodiment of the present disclosure may be that, in the display device of the above-mentioned 2nd embodiment or the above-mentioned 4th embodiment, the minimum value m2 of the brightness within the range of an angle of greater than -10° and less than +10° relative to the focusing direction of the optical sheet is greater than 50% of the maximum value M2 of the brightness within the range of greater than -10° and less than +10° relative to the focusing direction of the optical sheet.

[0174] A twelfth aspect of the present disclosure is a method for manufacturing a display device, the display device comprising: a light-emitting substrate having a semiconductor layer divided into a plurality of unit areas, and light-emitting portions arranged in the plurality of unit areas; and an optical sheet arranged opposite to the light-emitting substrate, wherein:

[0175] The optical sheet has a plurality of unit lenses, the plurality of unit lenses are arranged in a first direction and extend in a second direction that is not parallel to the first direction.

[0176] The plurality of unit regions are arranged in the first direction and the second direction,

[0177] The pitch of the light emitting portions in the first direction is set to p, the width of the light emitting portions in the first direction is set to w, the radius of curvature of the lens surface of the unit lens is set to r, and the distance between the light emitting portion and the unit lens is set to d, and the manufacturing method of the display device includes an adjustment step of adjusting the radius of curvature r and the distance d according to the value of w / p,

[0178] In the adjustment process, when w / p is less than 0.025, the curvature radius r and the distance d are adjusted so that at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (1); r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (2); r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (3); r / p is greater than or equal to 0.525 and less than 0.725 and satisfies the following formula (4); and r / p is greater than or equal to 0.725 and less than 1.5 and satisfies the following formula (5),

[0179] In the adjustment process, when w / p is greater than or equal to 0.025 and less than 0.075, the curvature radius r and the distance d are adjusted so that at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (6); r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (7); r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (8); r / p is greater than or equal to 0.525 and less than 0.725 and satisfies the following formula (9); and r / p is greater than or equal to 0.725 and less than 1.5 and satisfies the following formula (10),

[0180] In the adjustment step, when w / p is greater than or equal to 0.075 and less than 0.15, the curvature radius r and the distance d are adjusted so that at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.375 and satisfies the following formula (11); r / p is greater than or equal to 0.375 and less than 1.5 and satisfies the following formula (12); r / p is greater than or equal to 0.2 and less than 0.725 and satisfies the following formula (13); and r / p is greater than or equal to 0.725 and less than 1.5 and satisfies the following formula (14),

[0181] In the adjustment step, when w / p is greater than or equal to 0.15 and less than 0.25, the curvature radius r and the distance d are adjusted so that at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.725 and satisfies the following formula (15); r / p is greater than or equal to 0.725 and less than 1.5 and satisfies the following formula (16); and r / p is greater than or equal to 0.2 and less than 1.5 and satisfies the following formula (17),

[0182] In the adjustment step, when w / p is greater than or equal to 0.25 and less than 0.35, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.25 and less than 0.975 and satisfies the following formula (18); and r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (19),

[0183] In the adjustment step, when w / p is greater than or equal to 0.35 and less than 0.45, the radius of curvature r and the distance d are adjusted so that r / p is greater than or equal to 0.3 and less than 1.5 and satisfies the following formula (20),

[0184] In the adjustment step, when w / p is greater than or equal to 0.45 and less than 0.55, the radius of curvature r and the distance d are adjusted so that r / p is greater than or equal to 0.4 and less than 1.5 and satisfies the following formula (21),

[0185] In the adjustment step, when w / p is greater than or equal to 0.55 and less than 0.65, the radius of curvature r and the distance d are adjusted so that r / p is greater than or equal to 0.45 and less than 1.5 and satisfies the following formula (22),

[0186] [Number 5]

[0187] 1.18×r / p-0.29≤d / p≤1.36×r / p-0.05…Formula (1)

[0188] 1.18×r / p-0.29≤d / p≤2.08×r / p-0.15…Formula (2)

[0189] 2.43×r / p+0.05≤d / p≤4.64×r / p-0.3…Formula (3)

[0190] 4.5×r / p-0.85≤d / p≤4.64×r / p-0.3…Formula (4)

[0191] 4.5×r / p-0.85≤d / p≤1.2×r / p+2.46…Formula (5)

[0192] 1.18×r / p-0.29≤d / p≤1.36×r / p…Formula (6)

[0193] 1.18×r / p-0.29≤d / p≤2.95×r / p-0.03…Formula (7)

[0194] 2.57×r / p-0.01≤d / p≤4.65×r / p-0.3…Formula (8)

[0195] 4.67×r / p-0.98≤d / p≤4.65×r / p-0.3…Formula (9)

[0196] 4.67×r / p-0.98≤d / p≤1.2×r / p+2.46…Formula (10)

[0197] 1.18×r / p-0.29≤d / p≤4×r / p-0.1…Formula (11)

[0198] 1.18×r / p-0.29≤d / p≤2.17×r / p-0.19…Formula (12)

[0199] 4.79×r / p-1.09≤d / p≤5.07×r / p-0.58…Formula (13)

[0200] 4.79×r / p-1.09≤d / p≤1.8×r / p+1.94…Formula (14)

[0201] 1.18×r / p-0.29≤d / p≤4.84×r / p-0.45…Formula (15)

[0202] 1.18×r / p-0.29≤d / p≤1.69×r / p+0.6…Formula (16)

[0203] 5.6×r / p-1.84≤d / p≤1.8×r / p+1.94…Formula (17)

[0204] 1.22×r / p-0.33≤d / p≤4.55×r / p-0.42…Formula (18)

[0205] 1.22×r / p-0.33≤d / p≤1.04×r / p+1.78…Formula (19)

[0206] 1.26×r / p-0.37≤d / p≤5.56×r / p-1.01…Formula (20)

[0207] 1.28×r / p-0.39≤d / p≤5.83×r / p-1.29…Formula (21)

[0208] 1.38×r / p-0.45≤d / p≤5.8×r / p-1.48…Formula (22).

[0209] A thirteenth aspect of the present disclosure is a method for manufacturing a display device, the display device comprising: a light-emitting substrate having a semiconductor layer divided into a plurality of unit areas, and light-emitting portions arranged in the plurality of unit areas; and an optical sheet arranged opposite to the light-emitting substrate, wherein:

[0210] The optical sheet has a plurality of unit lenses, the plurality of unit lenses are arranged in a first direction and extend in a second direction that is not parallel to the first direction.

[0211] The plurality of unit regions are arranged in the first direction and the second direction,

[0212] The pitch of the light emitting portions in the first direction is set to p, the width of the light emitting portions in the first direction is set to w, the radius of curvature of the lens surface of the unit lens is set to r, and the distance between the light emitting portion and the unit lens is set to d, and the manufacturing method of the display device includes an adjustment step of adjusting the radius of curvature r and the distance d according to the value of w / p,

[0213] In the adjustment step, when w / p is less than 0.025, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (23); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (24).

[0214] In the adjustment step, when w / p is greater than or equal to 0.025 and less than 0.15, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (25); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (26),

[0215] In the adjustment step, when w / p is greater than or equal to 0.15 and less than 0.25, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (27); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (28),

[0216] In the adjustment step, when w / p is greater than or equal to 0.25 and less than 0.35, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.25 and less than 0.425 and satisfies the following formula (29); and r / p is greater than or equal to 0.425 and less than 1.5 and satisfies the following formula (30),

[0217] In the adjustment step, when w / p is greater than or equal to 0.35 and less than 0.45, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.3 and less than 0.525 and satisfies the following formula (31); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (32),

[0218] In the adjustment step, when w / p is greater than or equal to 0.45 and less than 0.55, the radius of curvature r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.4 and less than 0.625 and satisfies the following formula (33); and r / p is greater than or equal to 0.625 and less than 1.5 and satisfies the following formula (34),

[0219] In the adjustment step, when w / p is greater than or equal to 0.55 and less than 0.65, the radius of curvature r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.45 and less than 0.625 and satisfies the following formula (35); and r / p is greater than or equal to 0.625 and less than 1.5 and satisfies the following formula (36),

[0220] [Number 6]

[0221] 1.18×r / p-0.29≤d / p≤1×r / p-0.02…Formula (23)

[0222] 1.18×r / p-0.29≤d / p≤1.33×r / p+0.15…Formula (24)

[0223] 1.18×r / p-0.29≤d / p≤1.14×r / p-0.04…Formula (25)

[0224] 1.18×r / p-0.29≤d / p≤1.3×r / p+0.18…Formula (26)

[0225] 1.18=r / p-0.29≤d / p≤-0.29×r / p+0.73…Formula (27)

[0226] 1.18×r / p-0.29≤d / p≤1.29×r / p+0.28…Formula (28)

[0227] 1.22×r / p-0.33≤d / p≤4.6×r / p-0.52…Formula (29)

[0228] 1.22×r / p-0.33≤d / p≤1.23×r / p+0.38…Formula (30)

[0229] 1.26×r / p-0.37≤d / p≤5.4×r / p-0.96…Formula (31)

[0230] 1.26×r / p-0.37≤d / p≤0.77×r / p+1.08…Formula (32)

[0231] 1.28×r / p-0.39≤d / p≤5.83×r / p-1.29…Formula (33)

[0232] 1.28×r / p-0.39≤d / p≤0.4×r / p+1.77…Formula (34)

[0233] 1.38×r / p-0.45≤d / p≤7.6×r / p-2.44…Formula (35)

[0234] 1.38×r / p-0.45≤d / p≤0.26×r / p+2.29…Formula (36).

[0235] A 14th aspect of the present disclosure is a method for manufacturing a display device, the display device comprising: a light-emitting substrate having a semiconductor layer divided into a plurality of unit areas, and light-emitting portions arranged in the plurality of unit areas; and an optical sheet arranged opposite to the light-emitting substrate, wherein:

[0236] The optical sheet has a plurality of unit lenses, the plurality of unit lenses are arranged in a first direction and extend in a second direction that is not parallel to the first direction.

[0237] The plurality of unit regions are arranged in the first direction and the second direction,

[0238] The pitch of the light emitting portions in the first direction is set to p, the width of the light emitting portions in the first direction is set to w, the radius of curvature of the lens surface of the unit lens is set to r, and the distance between the light emitting portion and the unit lens is set to d, and the manufacturing method of the display device includes an adjustment step of adjusting the radius of curvature r and the distance d according to the value of w / p,

[0239] In the adjustment process, when w / p is greater than or equal to 0.01 and less than 0.05, the curvature radius r and the distance d are adjusted so that at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (37); r / p is greater than or equal to 0.525 and less than 0.975 and satisfies the following formula (38); r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (39); r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (40); and r / p is greater than or equal to 0.525 and less than 0.975 and satisfies the following formula (41),

[0240] When w / p is greater than or equal to 0.05 and less than 0.1, the curvature radius r and the distance d are adjusted so that at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (42); r / p is greater than or equal to 0.525 and less than 0.975 and satisfies the following formula (43); r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (44); r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (45); and r / p is greater than or equal to 0.525 and less than 0.975 and satisfies the following formula (46),

[0241] When w / p is greater than or equal to 0.1 and less than 0.2, the radius of curvature r and the distance d are adjusted so that at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.375 and satisfies the following formula (47); r / p is greater than or equal to 0.375 and less than 0.975 and satisfies the following formula (48); r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (49); and r / p is greater than or equal to 0.375 and less than 0.975 and satisfies the following formula (50),

[0242] When w / p is greater than or equal to 0.2 and less than 0.3, the radius of curvature r and the distance d are adjusted so that at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.25 and less than 0.725 and satisfies the following formula (51); r / p is greater than or equal to 0.725 and less than 0.975 and satisfies the following formula (52); r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (53); and r / p is greater than or equal to 0.725 and less than 0.975 and satisfies the following formula (54),

[0243] When w / p is greater than or equal to 0.3 and less than 0.4, the radius of curvature r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.35 and less than 0.975 and satisfies the following formula (55); and r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (56),

[0244] When w / p is greater than or equal to 0.4 and less than 0.5, the radius of curvature r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.4 and less than 0.675 and satisfies the following equation (57); and r / p is greater than or equal to 0.675 and less than 1.5 and satisfies the following equation (58),

[0245] When w / p is greater than or equal to 0.5 and less than 0.6, the radius of curvature r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.5 and less than 0.675 and satisfies the following equation (59); and r / p is greater than or equal to 0.675 and less than 1.5 and satisfies the following equation (60),

[0246] [Number 7]

[0247] 0.21×r / p+0.01≤d / p≤1×r / p-0.02…Formula (37)

[0248] 1.4×r / p-0.45≤d / p≤2.23×r / p-0.4…Formula (38)

[0249] 1.09×r / p-0.18≤d / p≤1.53×r / p+0.3…Formula (39)

[0250] 2.43×r / p+0.05≤d / p≤3.57×r / p-0.21…Formula (40)

[0251] 4.57×r / p-0.89≤d / p≤4×r / p-0.3…Formula (41)

[0252] 0.21×r / p+0.01≤d / p≤0.79×r / p+0.11…Formula (42)

[0253] 1.4×r / p-0.45≤d / p≤2.23×r / p-0.4…Formula (43)

[0254] 1.09×r / p-0.18≤d / p≤1.56×r / p+0.27…Formula (44)

[0255] 2.57×r / p-0.01≤d / p≤3.43×r / p-0.17…Formula (45)

[0256] 4.77×r / p-1.04≤d / p≤4.13×r / p-0.41…Formula (46)

[0257] 0.6×r / p-0.09≤d / p≤4×r / p-0.4…Formula (47)

[0258] 1.53×r / p-0.56≤d / p≤2.27×r / p-0.35…Formula (48)

[0259] 1.09×r / p-0.18≤d / p≤1.56×r / p+0.28…Formula (49)

[0260] 4.79×r / p-1.09≤d / p≤4.41×r / p-0.64…Formula (50)

[0261] 1.03×r / p-0.26≤d / p≤4.39×r / p-0.64…Formula (51)

[0262] 1.4×r / p-0.45≤d / p≤0.4×r / p+1.58…Formula (52)

[0263] 1.15×r / p-0.24≤d / p≤1.49×r / p+0.54…Formula (53)

[0264] 5.6×r / p-1.84≤d / p≤4×r / p-0.3…Formula (54)

[0265] 1.45×r / p-0.5≤d / p≤4.45×r / p-0.77…Formula (55)

[0266] 1.16×r / p0.25≤d / p≤0.35×r / p+2.51…Formula (56)

[0267] 1.77×r / p-0.68≤d / p≤5.43×r / p-1.43…Formula (57)

[0268] 1.13×r / p-0.22≤d / p≤3.23×r / p+0.13…Formula (58)

[0269] 2.6×r / p-1.17≤d / p≤6.6×r / p-2.27…Formula (59)

[0270] 1.27×r / p-0.33≤d / p≤3.3×r / p-0.06…Formula (60).

[0271] A fifteenth aspect of the present disclosure is a method for manufacturing a display device, the display device comprising: a light-emitting substrate having a semiconductor layer divided into a plurality of unit areas, and light-emitting portions arranged in the plurality of unit areas; and an optical sheet arranged opposite to the light-emitting substrate, wherein:

[0272] The optical sheet has a plurality of unit lenses, the plurality of unit lenses are arranged in a first direction and extend in a second direction that is not parallel to the first direction.

[0273] The plurality of unit regions are arranged in the first direction and the second direction,

[0274] The pitch of the light emitting portions in the first direction is set to p, the width of the light emitting portions in the first direction is set to w, the radius of curvature of the lens surface of the unit lens is set to r, and the distance between the light emitting portion and the unit lens is set to d, and the manufacturing method of the display device includes an adjustment step of adjusting the radius of curvature r and the distance d according to the value of w / p,

[0275] In the adjustment step, when w / p is greater than or equal to 0.01 and less than 0.05, the radius of curvature r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (61); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (62),

[0276] When w / p is greater than or equal to 0.05 and less than 0.1, the radius of curvature r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following equation (63); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following equation (64),

[0277] When w / p is greater than or equal to 0.1 and less than 0.2, the radius of curvature r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following equation (65); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following equation (66),

[0278] When w / p is greater than or equal to 0.2 and less than 0.3, the radius of curvature r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.25 and less than 0.525 and satisfies the following equation (67); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following equation (68),

[0279] When w / p is greater than or equal to 0.3 and less than 0.4, the radius of curvature r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.35 and less than 0.675 and satisfies the following equation (69); and r / p is greater than or equal to 0.675 and less than 1.5 and satisfies the following equation (70),

[0280] When w / p is greater than or equal to 0.4 and less than 0.5, the radius of curvature r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.4 and less than 0.675 and satisfies the following equation (71); and r / p is greater than or equal to 0.675 and less than 1.5 and satisfies the following equation (72),

[0281] When w / p is greater than or equal to 0.5 and less than 0.6, the radius of curvature r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.5 and less than 0.675 and satisfies the following equation (73); and r / p is greater than or equal to 0.675 and less than 1.5 and satisfies the following equation (74),

[0282] [Number 8]

[0283] 0.21×r / p+0.02≤d / p≤1×r / p-0.08…Formula (61)

[0284] 1.17×r / p-0.28≤d / p≤1.26×r / p+0.13…Formula (62)

[0285] 0.21×r / p+0.02≤d / p≤1×r / p-0.08…Formula (63)

[0286] 1.17×r / p-0.28≤d / p≤1.26×r / p+0.14…Formula (64)

[0287] 0.21×r / p+0.01≤d / p≤0.71×r / p+0.05…Formula (65)

[0288] 1.17×r / p-0.28≤d / p≤1.26×r / p+0.14…Formula (66)

[0289] 0.29×r / p-0.05≤d / p≤-0.23×r / p+0.62…Formula (67)

[0290] 1.2×r / p-0.3≤d / p≤1.2×r / p+0.21…Formula (68)

[0291] 1.43×r / p-0.49≤d / p≤1.07×r / p+0.45…Formula (69)

[0292] 1.19×r / p-0.28≤d / p≤1×r / p+0.5…Formula (70)

[0293] 1.77×r / p-0.68≤d / p≤2.86×r / p-0.23…Formula (71)

[0294] 1.15×r / p-0.23≤d / p≤0.64×r / p+1.13…Formula (72)

[0295] 2.6×r / p-1.17≤d / p≤6.6×r / p-2.27…Formula (73)

[0296] 1.27×r / p-0.33≤d / p≤0.35×r / p+1.78…Formula (74).

[0297] According to the present disclosure, it is possible to increase the brightness in the direction in which the display device is visually recognized. BRIEF DESCRIPTION OF THE DRAWINGS

[0298] Figure 1 It is an exploded perspective view schematically showing each element of the display device.

[0299] Figure 2 This is a cross-sectional view showing an enlarged portion of a light emitting substrate of a display device.

[0300] Figure 3 This is a plan view showing a part of the light emitting substrate of the display device in an enlarged manner.

[0301] Figure 4 It is along Figure 3 A cross-sectional view of the display device taken along line IV-IV.

[0302] Figure 5 This is a diagram showing a state where the display device is viewed from a second direction.

[0303] Figure 6 This is a diagram showing an example of brightness distribution of a display device in a direction perpendicular to the second direction.

[0304] Figure 7a This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0305] Figure 7b This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0306] Figure 8 This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0307] Fig. 9 This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0308] Fig.10 This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0309] Fig.11 This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0310] Fig.12This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0311] Fig.13 This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0312] Fig.14 This is a diagram showing an example of the path of light when light emitted from the light emitting portion of the light emitting substrate passes through the optical sheet.

[0313] Fig.15 This is a diagram showing an example of the path of light when light emitted from the light emitting portion of the light emitting substrate passes through the optical sheet.

[0314] Fig.16 This is a diagram showing an example of the path of light when light emitted from the light emitting portion of the light emitting substrate passes through the optical sheet.

[0315] Fig.17a This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0316] Fig.17b This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0317] Fig.17c This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0318] Fig.17d This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0319] Fig.17e This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0320] Fig.17f This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0321] Figure 17g This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0322] Fig.18a This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0323] Fig.18b This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0324] Fig.18c This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0325] Fig.19 This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0326] Fig. 20 This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0327] Fig.21 This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0328] Fig. 22 This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0329] Fig.23 This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0330] Fig.24a 3 is a cross-sectional view showing a cross section perpendicular to the second direction of a display device according to Modification 2.

[0331] Figure 24b This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction for the display device of Modification Example 2.

[0332] Fig.25 This is a diagram showing an example of a case where the display device is used as a head-up display.

[0333] Fig.26a 3 is a cross-sectional view showing a cross section perpendicular to the second direction of a display device according to Modification 3.

[0334] Figure 26b This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction for the display device of Modification Example 3.

[0335] Fig. 27 This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0336] Fig.28 This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0337] Fig.29 This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0338] Fig.30 This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0339] Fig.31 This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0340] Fig.32 This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0341] Fig.33 This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0342] Fig.34 This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0343] Fig.35 This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0344] Fig.36 This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0345] Fig.37 This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0346] Fig.38 This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0347] Fig.39 This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device.

[0348] Fig.40 This is a diagram showing the test results of simulating the brightness distribution in the direction perpendicular to the second direction of the display device. DETAILED DESCRIPTION

[0349] Hereinafter, one embodiment will be described with reference to the drawings. Figures 1 to 5It is a figure showing an embodiment. The figures shown below are schematically shown. Therefore, in order to facilitate understanding, the size and shape of each part are appropriately exaggerated. In addition, it can be implemented by appropriate changes without departing from the scope of the technical idea. In addition, in the figures shown below, the same parts are marked with the same reference numerals, and sometimes a part of the detailed description is omitted. In addition, the numerical values ​​and material names of the dimensions of each component recorded in this specification are used as an example of an embodiment, are not limited to this, and can be appropriately selected for use.

[0350] In addition, the "plate surface (sheet surface, film surface)" refers to a surface that is consistent with the plane direction of the target plate-like (sheet-like, film-like) component when the target plate-like (sheet-like, film-like) component is viewed as a whole and globally.

[0351] Furthermore, terms such as "parallel", "orthogonal", "same", etc., or values ​​of lengths and angles used in this specification to determine shape or geometric conditions and their degrees are not limited to strict meanings but can be interpreted within a range that includes the degree to which the same function can be expected.

[0352] Figure 1 FIG. 1 is an exploded perspective view schematically showing a display device 1 of the present invention. Figure 1 In the figure, the sealing layer 40, the adhesive layer 50 and the base material layer 60 described later are omitted. Figure 1 As shown, the display device 1 includes a light emitting substrate 10 and an optical sheet 20 disposed opposite to the light emitting substrate 10. Figure 1 Although not shown in the figure, a sealing layer 40, an adhesive layer 50, and a base material layer 60 are provided between the light emitting substrate 10 and the optical sheet 20. Figure 1 In the example shown, the optical sheet 20 has a first surface 20a opposite to the light-emitting substrate 10 and a second surface 20b located on the opposite side of the first surface 20a. The display device 1 of this embodiment is, for example, a display device equipped with LEDs, that is, a so-called LED display. Hereinafter, a case where the display device 1 is a so-called micro LED display in which light emitted from one or more light-emitting diodes is used as one pixel is described.

[0353] The light emitting substrate 10 emits light that forms an image. Figure 2 1 is an enlarged cross-sectional view showing the structure of the light emitting substrate 10. Figure 2 As shown, the light emitting substrate 10 includes a semiconductor layer 11 and a plurality of light emitting portions 13 provided on the semiconductor layer 11. Each light emitting portion 13 includes an active layer 14 in contact with the semiconductor layer 11, and a second semiconductor layer 15 in contact with the active layer 14. That is, at a position of the light emitting substrate 10 where the light emitting portion 13 is provided, the semiconductor layer 11, the active layer 14, and the second semiconductor layer 15 are stacked in this order.

[0354] By applying a voltage between the semiconductor layer 11 and the second semiconductor layer 15, the active layer 14 can emit light. In order to apply a voltage between the semiconductor layer 11 and the second semiconductor layer 15, electrodes (not shown) are provided on the semiconductor layer 11 and the second semiconductor layer 15, and the electrodes are connected to an external power source via a circuit formed on the semiconductor layer 11. In addition, the upper surface of the light emitting portion 13 becomes a light emitting surface 17 that emits light emitted from the active layer 14. Figure 2 In the example shown, the surface of the second semiconductor layer 15 opposite to the surface in contact with the active layer 14 serves as a light emitting surface 17 from which light emitted by the active layer 14 is emitted.

[0355] In this embodiment, the light emitting substrate 10 includes, as the light emitting section 13, a first light emitting section 13R that emits light of a certain wavelength and a second light emitting section 13G that emits light of a wavelength different from that of the first light emitting section 13R. Figure 2 In the example shown, the light emitting substrate 10 further includes a third light emitting portion 13B that emits light of a wavelength different from that of the first light emitting portion 13R and the second light emitting portion 13G as the light emitting portion 13. The light emitting substrate 10 includes a plurality of first light emitting portions 13R, a plurality of second light emitting portions 13G, and a plurality of third light emitting portions 13B as the plurality of light emitting portions 13. The first light emitting portion 13R, the second light emitting portion 13G, and the third light emitting portion 13B are light emitting diodes.

[0356] Figure 3 FIG. 1 is a plan view showing a part of the light emitting substrate 10 of the display device 1 after enlarging the part. Figure 2 and Figure 3 As shown, the semiconductor layer 11 is divided into a plurality of unit regions 10a. Figure 3 In the example shown, the unit regions 10a are arranged in a first direction d1 and a second direction d2 that is not parallel to the first direction d1. In the example shown in the figure, the first direction d1 and the second direction d2 are orthogonal to each other. In addition, in the example shown in the figure, a plurality of unit regions 10a are arranged so as to be connected to each other in the first direction d1 and the second direction d2. Figure 3 , one unit area 10a is shown with oblique lines. The light-emitting section 13 is arranged in a plurality of unit areas 10a. In the example shown in the figure, the light-emitting section 13 is arranged in all the unit areas 10a. One light-emitting section 13 is arranged in one unit area 10a. In addition, in the example shown in the figure, the light-emitting section 13 is arranged in the center of the unit area 10a. The light-emitting sections 13 are arranged at the same intervals in the first direction d1 and the second direction d2.

[0357] exist Figure 3 In the example shown, the light emitting substrate 10 includes a first light emitting section 13R, a second light emitting section 13G, and a third light emitting section 13B as the light emitting sections 13. Figure 3 In the example shown, one unit region group 10b of the light emitting substrate 10 includes one unit region 10a where the first light emitting section 13R is arranged, one unit region 10a where the second light emitting section 13G is arranged, and one unit region 10a where the third light emitting section 13B is arranged. Figure 3 In the example shown, the light-emitting substrate 10 has a plurality of unit area groups 10b arranged in the first direction d1 and the second direction d2. In one unit area group 10b, a unit area 10a in which a first light-emitting portion 13R is arranged, a unit area 10a in which a second light-emitting portion 13G is arranged, and a unit area 10a in which a third light-emitting portion 13B is arranged are arranged in the second direction d2. The unit area group 10b becomes a pixel area of ​​the display device 1. The light-emitting portion 13 arranged in each unit area group 10b forms a pixel of the display device 1.

[0358] exist Figure 3 In the example shown, the width of the unit area 10a in the first direction d1, which is the direction in which the plurality of unit lenses 21 described later are arranged, is larger than the width of the unit area 10a in the second direction d2, which is the direction in which the unit lenses 21 extend. In addition, the width of the light-emitting portion 13 in the first direction d1 is larger than the width of the light-emitting portion 13 in the second direction d2. Although not shown, the width of the unit area 10a in the first direction d1, which is the direction in which the plurality of unit lenses 21 described later are arranged, is smaller than the width of the unit area 10a in the second direction d2, which is the direction in which the unit lenses 21 extend. In addition, the width of the light-emitting portion 13 in the first direction d1 may be smaller than the width of the light-emitting portion 13 in the second direction d2.

[0359] Figure 4 The display device 1 is along Figure 3 The cross-sectional view of the IV-IV line. Figure 3 and Figure 4 As shown in FIG. 1 , the pitch of the light emitting parts 13 in the first direction d1 is set to p. Figure 3 and Figure 4 The dotted line marked with reference numeral C1 shown in the figure represents the center of the light-emitting portion 13 in the first direction d1. The pitch p of the light-emitting portion 13 is the distance from the center C1 of the light-emitting portion 13 of a certain unit area 10a in the first direction d1 to the center C1 of the light-emitting portion 13 of a unit area 10a adjacent to the unit area 10a in the first direction d1 in the first direction d1. The pitch p of the light-emitting portion 13 is, for example, not less than 10 μm and not more than 2000 μm. The pitch p of the light-emitting portion 13 may also be not less than 10 μm and not more than 500 μm. In addition, the length of the unit area 10a along the first direction d1 and the second direction d2 is, for example, not less than 10 μm and not more than 2000 μm. Figure 3 and Figure 4In the example shown, the length of the unit area 10a along the first direction d1 is equal to the pitch p of the light emitting parts 13. Figure 3 and Figure 4 As shown, the width of the light emitting portion 13 in the first direction d1 is set to w. In other words, the width w of the light emitting portion 13 is the length of the light emitting portion 13 along the first direction d1. The width w of the light emitting portion 13 is, for example, greater than 1 μm and less than 1200 μm. The length of the light emitting portion 13 along the second direction d2 is, for example, greater than 1 μm and less than 1200 μm.

[0360] The optical sheet 20 changes the traveling direction of the light emitted from the light-emitting substrate 10. The optical sheet 20 focuses the light emitted from the light-emitting substrate 10 in a specific direction. In particular, the illustrated optical sheet 20 focuses the light emitted from the light-emitting substrate 10 and diffused in a direction perpendicular to the second direction d2 in a specific direction perpendicular to the second direction d2. In other words, the optical sheet 20 changes the traveling direction of the light emitted from the light-emitting substrate 10 so that the light is focused in a specific direction and visible when observed from the second direction d2. The direction in which the optical sheet 20 focuses the light emitted from the light-emitting substrate 10 is referred to as the focusing direction. The focusing direction is the direction in which the brightness becomes the maximum in the brightness distribution of the light emitted from the light-emitting substrate 10 and passing through the optical sheet 20.

[0361] The optical sheet 20 focuses the light emitted from the light-emitting substrate 10 in a direction in which the user is assumed to visually recognize the display device 1 with high frequency. In addition, the user of the display device 1 sometimes visually recognizes the light from the display device 1 via a light-reflecting component. In this case, the light from the display device 1 is emitted toward the light-reflecting component, is reflected by the light-reflecting component, and then reaches the user's eyes. For example, in the case where the display device 1 is used as a head-up display that projects an image on the windshield of a car, the user visually recognizes the light from the display device 1 via the windshield. In such a case, the direction of the assumed path of the light from the display device 1 to the light-reflecting component can be regarded as the direction in which the user is assumed to visually recognize the display device 1. In this case, the optical sheet 20 focuses the light emitted from the light-emitting substrate 10 in the direction of the assumed path of the light from the display device 1 to the light-reflecting component.

[0362] It is assumed that the direction in which the user visually recognizes the display device 1 with high frequency may be, for example, the front direction of the display device 1. In this case, the optical sheet 20 focuses the light emitted from the light-emitting substrate 10 and diffused in the direction perpendicular to the second direction d2 toward the front direction of the display device 1. In other words, the focusing direction in which the optical sheet 20 focuses the light diffused in the direction perpendicular to the second direction d2 is the front direction of the display device 1. The front direction is the direction of the normal direction d4 of the plate surface of the light-emitting substrate 10. Hereinafter, as an example of the optical sheet 20 of the present embodiment, the optical sheet 20 that focuses the light emitted from the light-emitting substrate 10 and diffused in the direction perpendicular to the second direction d2 toward the front direction of the display device 1 is described.

[0363] like Figure 4 As shown, the optical sheet 20 has a plurality of unit lenses 21. Figure 4 In the example shown, the optical sheet 20 includes a plurality of unit lenses 21 and a main body portion 23. The plurality of unit lenses 21 are provided on the main body portion 23. Figure 4 The dashed line indicated by the reference numeral L1 is a virtual line indicating the boundary between the plurality of unit lenses 21 and the main body 23. Figure 4 In the example shown, the unit lenses 21 adjacent to each other in the first direction d1 are in contact with each other. In this case, the surface at which the lens surfaces 21a of the adjacent unit lenses 21 are connected to each other and which is perpendicular to the front direction (normal direction d4) of the display device 1 can be regarded as the boundary L1 between the unit lens 21 and the main body 23. Although not shown in the figure, as described later, a gap may be provided between the unit lenses 21 adjacent to each other along the first direction d1. In this case, the surface at which the surface formed between the adjacent unit lenses 21 of the optical sheet 20 is connected to the lens surface 21a of the unit lens 21 and which is perpendicular to the front direction (normal direction d4) of the display device 1 can be regarded as the boundary L1 between the unit lens 21 and the main body 23.

[0364] The thickness of the optical sheet 20 is, for example, not less than 10 μm and not more than 4000 μm. The refractive index of the optical sheet 20 is, for example, not less than 1.4 and less than 1.7. The refractive index of the optical sheet 20 is preferably not less than 1.45 and less than 1.65, and more preferably not less than 1.50 and less than 1.60. The refractive index of the optical sheet 20 may also be not less than 1.45 and less than 1.54. The material of the optical sheet 20 is not particularly limited, and for example, it may be a light-transmitting material made of resin or glass. Examples of the material of the optical sheet 20 include polyethylene terephthalate, polyolefin, polycarbonate, polyacrylate, polyamide, triacetyl cellulose, and glass. The optical sheet 20 may be formed, for example, of a film having polyethylene terephthalate, polyolefin, polycarbonate, polyacrylate, polyamide, triacetyl cellulose as a main component, glass, or the like. In Figure 4 In the example shown, the main body 23 and the unit lens 21 of the optical sheet 20 are formed integrally from the same material. Here, "having light transmittance" and "transparent" mean having a degree of transparency that allows one to see through the other side of the optical sheet 20 from one side through the optical sheet 20. The optical sheet 20 has a visible light transmittance of, for example, 30% or more, more preferably 70% or more. The visible light transmittance is determined as the average value of the transmittance at each wavelength when measured in the range of a measurement wavelength of 380nm to 780nm using a spectrophotometer ("UV-3100PC" manufactured by Shimadzu Corporation, JIS K 0115 standard product).

[0365] The unit lens 21 is an element that refracts incident light at the lens surface 21a as its surface to change the traveling direction of the light. In this embodiment, the unit lens 21 focuses the light emitted from the light emitting substrate 10 and diffused in the direction perpendicular to the second direction d2 toward the front direction of the display device 1.

[0366] The plurality of unit lenses 21 are arranged in the first direction d1 and extend in the second direction d2 which is not parallel to the first direction d1. In the present embodiment, the plurality of unit lenses 21 constitute a linear array lens.

[0367] In the example shown in the figure, the unit lens 21 extends linearly in the second direction d2. In the example shown in the figure, the first direction d1 and the second direction d2 are orthogonal to each other. Therefore, the plurality of unit lenses 21 are arranged in a direction orthogonal to the direction in which the unit lenses 21 extend linearly.

[0368] The plurality of unit lenses 21 are arranged corresponding to the unit regions 10a. In the present embodiment, the plurality of unit regions 10a are arranged in the first direction d1 and the second direction d2. Figure 1 The column of unit areas 10a formed by arranging the plurality of unit areas 10a in the second direction d2 is called a unit area second direction column 10c. In the present embodiment, when observed from the normal direction d4 of the plate surface of the light-emitting substrate 10, one of the unit lenses 21 corresponds to one of the unit area second direction columns 10c. In the present embodiment, each unit lens 21 of the plurality of unit lenses 21 corresponds to each unit area second direction column 10c of the plurality of unit area second direction columns 10c. The correspondence of a unit lens 21 to the unit area second direction column 10c means that the unit lens 21 overlaps in the normal direction d4 with the center of the light-emitting portion 13 of the unit area 10a constituting the unit area second direction column 10c in the first direction d1. In the present embodiment, as Figure 4As shown, each of the plurality of unit lenses 21 overlaps with the center C1 of the light emitting portion 13 of the unit area 10a constituting the second direction row 10c of each unit area in the first direction d1 in the normal direction d4. Figure 4 In the example shown, the center C2 of each of the plurality of unit lenses 21 in the first direction d1 overlaps with the center C1 of the light emitting portion 13 of the unit area 10a constituting each unit area second direction row 10c in the first direction d1.

[0369] exist Figure 3 In the example shown, as described above, the unit area 10a provided with the first light emitting unit 13R and the unit area 10a provided with the second light emitting unit 13G are arranged in the second direction d2 in which the unit lenses 21 extend. In this case, one of the unit lenses 21 overlaps with the first light emitting unit 13R and the second light emitting unit 13G in the normal direction d4. Figure 3 In the example shown, in particular, the unit area 10a where the first light emitting section 13R is arranged, the unit area 10a where the second light emitting section 13G is arranged, and the unit area 10a where the third light emitting section 13B is arranged are arranged in the second direction d2. In this case, one of the unit lenses 21 overlaps the first light emitting section 13R, the second light emitting section 13G, and the third light emitting section 13B in the normal direction d4.

[0370] In the example shown in the figure, the unit lens 21 changes the traveling direction of light by refraction on the lens surface 21a. The unit lens 21 has a shape corresponding to a part of a circle or a part of an ellipse in a cross section perpendicular to its longitudinal direction (the second direction d2). In the present embodiment, the unit lens 21 has a shape corresponding to a part of a circle in a cross section perpendicular to the second direction d2. Figure 4 In the example shown, the unit lens 21 has a semicircular shape in a cross section perpendicular to the second direction d2. In the present embodiment, the unit lens 21 refracts light emitted from the light emitting substrate 10 so that the traveling direction of the light changes when viewed from the second direction d2.

[0371] Here, the curvature radius of the lens surface 21a of the unit lens 21 is set to r. In the present embodiment, the curvature radius r of the lens surface 21a of the unit lens 21 is determined by the shape of the lens surface 21a shown in the cross section of the unit lens 21 orthogonal to the second direction d2. Figure 4 In the example shown, the lens surface 21a of the unit lens 21 has a semicircular shape in a cross section perpendicular to the second direction d2. Therefore, the curvature radius r is Figure 4The height h of the unit lens 21 shown is equal. The height h of the unit lens 21 is the distance between the vertex P1 of the unit lens 21 and the boundary L1 between the unit lens 21 and the main body 23. The vertex P1 of the unit lens 21 is the point on the lens surface 21a shown in the cross section perpendicular to the second direction d2 of the unit lens 21, which is at the farthest position from the light-emitting substrate 10. Although not shown in the figure, in the case where the shape of the lens surface 21a shown in the cross section perpendicular to the second direction d2 of the unit lens 21 is not a shape corresponding to a part of a circle, the curvature radius at the vertex P1 can be determined as the curvature radius r.

[0372] In addition, the distance between the light emitting unit 13 and the unit lens 21 is set to d. Figure 4 As shown, the distance d corresponds to the distance between the light emitting portion 13 and the boundary L1 between the unit lens 21 and the main body portion 23 .

[0373] The radius of curvature r of the lens surface 21a of the unit lens 21 and the distance d between the light emitting unit 13 and the unit lens 21 are determined according to the pitch p of the light emitting unit 13 and the width w of the light emitting unit 13 so that the brightness in the direction of visually recognizing the display device 1 becomes sufficiently large. The radius of curvature r is, for example, greater than 2 μm and less than 3000 μm. The distance d is, for example, greater than 1 μm and less than 7000 μm.

[0374] The length (width) of the unit lens 21 along the first direction d1 is appropriately determined according to the curvature radius r, etc. The length (width) of the unit lens 21 along the first direction d1 is, for example, not less than 10 μm and not more than 2000 μm. The length of the unit lens 21 along the second direction d2 is appropriately determined according to the width of the region of the light emitting substrate 10 where the light emitting portion 13 is provided, etc.

[0375] like Figure 3 and Figure 4 As shown, the pitch of the unit lenses 21 in the first direction d1 is set to p2. The pitch p2 of the unit lenses 21 is the distance from the center C2 of a certain unit lens 21 in the first direction d1 to the center C2 of the unit lens 21 adjacent to the unit lens 21 in the first direction d1 in the first direction d1. The pitch p2 of the unit lenses 21 is, for example, not less than 10 μm and not more than 2000 μm. In the present embodiment, the pitch p2 of the unit lenses 21 is equal to the pitch p of the light emitting portion 13.

[0376] exist Figure 4In the example shown, the unit lenses 21 adjacent to each other in the first direction d1 are in contact with each other. Although not shown, a gap may be provided between the unit lenses 21 adjacent to each other in the first direction d1. In this case, the width of the gap provided between the unit lenses 21 adjacent to each other in the first direction d1 in the first direction d1 is appropriately determined according to the curvature radius r and the pitch p2 of the unit lenses 21.

[0377] The sealing layer 40 is a layer covering the surface of the light-emitting substrate 10 on which the light-emitting unit 13 is provided. The sealing layer 40 protects the light-emitting unit 13 by covering the surface of the light-emitting substrate 10 on which the light-emitting unit 13 is provided. The sealing layer 40 is formed of a transparent member. The material of the sealing layer 40 is not particularly limited, and is, for example, a resin or silicone. The refractive index of the sealing layer 40 is, for example, greater than 1.4 and less than 1.8. The thickness of the portion of the sealing layer 40 overlapping with the light-emitting unit 13 in the first direction d1 is, for example, greater than 1 μm and less than 7000 μm.

[0378] The substrate layer 60 is a layer of a substrate on which the optical sheet 20 is provided. In the present embodiment, the main body 23 of the optical sheet 20 is provided on the substrate layer 60 and supported by the substrate layer 60. The substrate layer 60 is formed of a transparent member. The material of the substrate layer 60 is not particularly limited, and is, for example, glass. The refractive index of the substrate layer 60 is, for example, greater than 1.4 and less than 1.8. The thickness of the substrate layer 60 is, for example, greater than 1 μm and less than 7000 μm.

[0379] The adhesive layer 50 is a layer that bonds the sealing layer 40 to the substrate layer 60 by bonding. The adhesive layer 50 is formed of a transparent member. The material of the adhesive layer 50 is not particularly limited, and is, for example, an optical transparent adhesive sheet (OCA). The adhesive layer 50 may not be provided, but the sealing layer 40 and the substrate layer 60 may be bonded by the characteristics of the sealing layer 40. The refractive index of the adhesive layer 50 is, for example, greater than 1.4 and less than 1.8. The thickness of the adhesive layer 50 is, for example, greater than 1 μm and less than 7000 μm.

[0380] exist Figure 4 In the example shown, the space between the light emitting substrate 10 and the optical sheet 20 is filled with the sealing layer 40, the adhesive layer 50, and the base layer 60. Thus, no air layer is formed between the light emitting substrate 10 and the optical sheet 20. The total thickness of the portion of the sealing layer 40, the adhesive layer 50, and the base layer 60 overlapping with the light emitting portion 13 in the first direction d1 is, for example, 1 μm or more and 7000 μm or less.

[0381] In the display device 1 of the present embodiment, the radius of curvature r and the distance d are determined based on the pitch p and the width w of the light emitting portions 13 so that the brightness in the direction in which the display device 1 is visually recognized becomes sufficiently large.

[0382] An example of a brightness condition in the present embodiment that enables the brightness in the direction in which the user is assumed to visually recognize the display device 1 to be sufficiently large is described. In the display device 1, in order to efficiently utilize light and, in particular, to increase the brightness in the direction in which the user is assumed to visually recognize the display device 1, it is required to focus light in that direction and increase the brightness in that direction. In particular, by focusing light in the direction in which the user is assumed to visually recognize the display device 1, the brightness in that direction can be relatively increased compared to a case in which light is emitted from the light-emitting substrate 10 in a state in which the optical sheet 20 is not overlapped on the light-emitting substrate 10. As an example, the brightness in the focusing direction of the optical sheet 20 is preferably 150% or more of the brightness in the normal direction d4 in a case in which light is emitted from the light-emitting substrate 10 in a state in which the optical sheet 20 is not overlapped on the light-emitting substrate 10. As the brightness in the normal direction d4 when light is emitted from the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped on the light-emitting substrate 10, the average value of the brightness within the range of an angle θ of greater than -5° and less than +5° relative to the front direction (normal direction d4) of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped can be used.

[0383] On the other hand, it is assumed that the user visually recognizes the display device 1 from a direction angled with respect to the focusing direction of the optical sheet 20. Based on this assumption, the display device 1 is required to have a higher luminance than a certain value in a direction with an angle of a certain value or less with respect to the focusing direction.

[0384] Figure 5 d2 is a diagram showing a state where the display device 1 is viewed from the second direction d2. Figure 5 In the figure, regarding the display device 1 , illustration of components of the display device 1 such as the light emitting substrate 10 and the optical sheet 20 is omitted, and only the schematic shape of the display device 1 is shown. Figure 5 The dashed line denoted by reference numeral L2 is a virtual line perpendicular to the second direction d2 and extending in a direction forming an angle θ with respect to the front direction of the display device 1 .

[0385] Figure 6 About Figures 1 to 5 The display device 1 shown is a diagram showing an example of brightness distribution in a direction perpendicular to the second direction d2. Figure 6 The vertical axis represents the brightness. Figure 6 The horizontal axis of represents an angle θ (corresponding to an angle formed with respect to the light-collecting direction of the optical sheet 20 ) formed by the direction from which the brightness represented by the vertical axis is observed with respect to the front direction of the display device 1 .

[0386] exist Figure 6In the brightness distribution shown, the maximum value of the brightness in the range of an angle of not less than -5° and not more than +5° with respect to the focusing direction of the optical sheet 20 (angle θ with respect to the front direction of the display device 1) is set to M. The maximum value M corresponds to the maximum value of the brightness in the direction of the display device 1 that is perpendicular to the second direction d2 and that is not less than -5° and not more than +5° with respect to the focusing direction of the optical sheet 20. Figure 6 In the brightness distribution shown, the minimum value of the brightness in the range of an angle of not less than -5° and not more than +5° with respect to the focusing direction of the optical sheet 20 (angle θ with respect to the front direction of the display device 1) is set to m. The minimum value m corresponds to the minimum value of the brightness in the direction of the display device 1 that is perpendicular to the second direction d2 and that is not less than -5° and not more than +5° with respect to the focusing direction of the optical sheet 20. Here, Figure 6 The minimum value m shown is preferably 50% or more of the maximum value M. Thus, even when the user visually recognizes the display device 1 from a direction that is angled with respect to the light-collecting direction of the optical sheet 20, the brightness in the direction in which the user visually recognizes the display device 1 can be ensured. In particular, in the observation from the second direction d2, when the angle formed by the direction of the line of sight of the user visually recognizing the display device 1 with respect to the light-collecting direction of the optical sheet 20 is greater than -5° and less than +5°, the brightness in the direction in which the user visually recognizes the display device 1 can be ensured. In addition, by making the minimum value m greater than 50% of the maximum value M, the difference between the minimum value m and the maximum value M becomes smaller, and the uniformity of the brightness in the range of the angle formed with respect to the light-collecting direction of the optical sheet 20 is greater than -5° and less than +5° becomes higher. Thus, for example, when the direction in which the user visually recognizes the display device 1 is changed within the range of the angle θ being greater than -5° and less than +5°, the change in the brightness visually recognized by the user can be reduced.

[0387] As described above, by satisfying simultaneously: the brightness in the light-collecting direction of the optical sheet 20 is 150% or more of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m is 50% or more of the maximum value M, the following effects can be obtained. By making the brightness in the light-collecting direction of the optical sheet 20 150% or more of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped, the brightness in the light-collecting direction of the optical sheet 20 can be sufficiently increased. Thus, when the user visually recognizes the display device 1 from the light-collecting direction, the brightness visually recognized by the user can be sufficiently increased. In addition, by making the above-mentioned minimum value m 50% or more of the maximum value M, the brightness of the display device 1 in a direction with an angle of -5° or more and +5° or less with respect to the light-collecting direction of the optical sheet 20 can be at least 75% or more of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped. Thus, when the user visually recognizes the display device 1 from a direction whose angle is greater than -5° and less than +5° relative to the focusing direction of the optical sheet 20, the brightness visually recognized by the user can be sufficiently increased. Thus, when the user visually recognizes the display device 1 from a direction whose angle is greater than -5° and less than +5° relative to the focusing direction of the optical sheet 20, the visibility of the display of the display device 1 can be sufficiently ensured.

[0388] As described above, as an example of the brightness condition of the display device 1, it is preferable to determine that, as described above, the following conditions are satisfied simultaneously: the brightness of the display device 1 is 150% or more of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m is 50% or more of the maximum value M. The display device 1 satisfying the above-mentioned brightness condition is particularly suitable for use as a head-up display. The display device 1 satisfying the above-mentioned brightness condition is particularly suitable for use as a head-up display that projects an image onto the windshield of a car.

[0389] The inventors of the present application have repeatedly conducted in-depth studies on a display device 1 that can sufficiently increase the brightness in the direction in which the user is assumed to visually recognize the display device 1, and in particular, a display device 1 that satisfies the above-mentioned brightness conditions. As a result, the inventors of the present application have found that by adjusting the radius of curvature r and the distance d according to the values ​​of the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 in the light-emitting substrate 10, a display device 1 that satisfies the above-mentioned brightness conditions can be provided. In particular, it has been found that by adjusting the radius of curvature r and the distance d according to the ratio of the width w of the light-emitting portions 13 to the pitch p of the light-emitting portions 13 (that is, the value of w / p), a display device 1 that satisfies the above-mentioned brightness conditions can be provided.

[0390] Hereinafter, for each value of w / p, conditions for the values ​​of the radius of curvature r and the distance d that can satisfy both the brightness of the display device 1 being 150% or more of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped and the above-mentioned minimum value m being 50% or more of the maximum value M will be described. In particular, conditions for the values ​​of the radius of curvature r and the distance d that satisfy the above-mentioned brightness conditions in the display device 1 in which the focusing direction of the optical sheet 20 is the front direction of the display device 1 will be described.

[0391] When w / p is less than 0.025, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (1); r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (2); r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (3); r / p is greater than or equal to 0.525 and less than 0.725 and satisfies the following formula (4); and r / p is greater than or equal to 0.725 and less than 1.5 and satisfies the following formula (5). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m is greater than or equal to 50% of the maximum value M.

[0392] [Number 9]

[0393] 1.18×r / p-0.29≤d / p≤1.36×r / p-0.05…Formula (1)

[0394] 1.18×r / p-0.29≤d / p≤2.08×r / p-0.15…Formula (2)

[0395] 2.43×r / p+0.05≤d / p≤4.64×r / p-0.3…Formula (3)

[0396] 4.5×r / p-0.85≤d / p≤4.64×r / p-0.3…Formula (4)

[0397] 4.5×r / p-0.85≤d / p≤1.2×r / p+2.46…Formula (5)

[0398] Figure 7a It shows that Figures 1 to 5 The display device 1 shown in the figure sets the pitch p of the light emitting portion 13, the width w of the light emitting portion 13, the radius of curvature r and the distance d, and simulates the results of the test of the brightness distribution in the direction perpendicular to the second direction d2. In the simulation test, the refractive index of the optical sheet 20 is set to 1.50. In addition, the radius of curvature r is set on the premise that the lens surface 21a of the unit lens 21 has a shape equivalent to a part of a circle. Figure 7a In particular, the results of the following experiment are shown: based on the determination of the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 in such a way that the value of w / p becomes 0.01, the values ​​of r / p and d / p are changed by changing the curvature radius r and the distance d, and the distribution of brightness is simulated. Figure 7a "1" in the table shown means that at the corresponding r / p and d / p values, the brightness of the display device 1 is 150% or more of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped, and the above-mentioned minimum value m is 50% or more of the maximum value M. For example, "1" is marked in the column where r / p is 0.2 and d / p is 0.1 in the table. This means that the above-mentioned brightness condition is satisfied as a result of determining the curvature radius r and the distance d so that r / p becomes 0.2 and d / p becomes 0.1 and simulating the distribution of brightness. Figure 7a The "0" in the table shown means that at the corresponding r / p and d / p values, at least one of the following conditions is not satisfied: the brightness of the display device 1 is 150% or more of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped, and the minimum value m is 50% or more of the maximum value M. For example, "0" is marked in the column where r / p is 0.2 and d / p is 0.3 in the table. This means that the above brightness condition is not satisfied when the curvature radius r and the distance d are determined so that r / p becomes 0.2 and d / p becomes 0.3 and the distribution of brightness is simulated.

[0399] according to Figure 7a The test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.2 and less than 0.525 and satisfies formula (1); r / p is greater than 0.525 and less than 1.5 and satisfies formula (2); r / p is greater than 0.2 and less than 0.525 and satisfies formula (3); r / p is greater than 0.525 and less than 0.725 and satisfies formula (4); and r / p is greater than 0.725 and less than 1.5 and satisfies formula (5), then the above-mentioned brightness conditions are met.

[0400] When w / p is greater than or equal to 0.025 and less than 0.075, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (6); r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (7); r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (8); r / p is greater than or equal to 0.525 and less than 0.725 and satisfies the following formula (9); r / p is greater than or equal to 0.725 and less than 1.5 and satisfies the following formula (10). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m is greater than or equal to 50% of the maximum value M.

[0401] [Number 10]

[0402] 1.18×r / p-0.29≤d / p≤1.36×r / p…Formula (6)

[0403] 1.18×r / p-0.29≤d / p≤2.05×r / p-0.03…Formula (7)

[0404] 2.57×r / p-0.01≤d / p≤4.65×r / p-0.3…Formula (8)

[0405] 4.67×r / p-0.98≤d / p≤4.65×r / p-0.3…Formula (9)

[0406] 4.67×r / p-0.98≤d / p≤1.2×r / p+2.46…Formula (10)

[0407] Figure 7b It shows that Figures 1 to 5 The display device 1 shown in the table is a table showing the results of a test in which the pitch p of the light emitting parts 13, the width w of the light emitting parts 13, the radius of curvature r and the distance d were set, and the brightness distribution in the direction perpendicular to the second direction d2 was simulated. In the simulation test, the refractive index of the optical sheet 20 was set to 1.50. Figure 7b In particular, the results of the following experiment are shown: based on the determination of the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 in such a way that the w / p value becomes 0.05, the values ​​of r / p and d / p are changed by changing the curvature radius r and the distance d, and the distribution of brightness is simulated. Figure 7b The meaning of "1" and "0" in the table shown is the same as Figure 7a "1" and "0" in the table shown have the same meaning.

[0408] according to Figure 7bThe test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.2 and less than 0.525 and satisfies formula (6); r / p is greater than 0.525 and less than 1.5 and satisfies formula (7); r / p is greater than 0.2 and less than 0.525 and satisfies formula (8); r / p is greater than 0.525 and less than 0.725 and satisfies formula (9); and r / p is greater than 0.725 and less than 1.5 and satisfies formula (10), then the above-mentioned brightness conditions are met.

[0409] When w / p is greater than or equal to 0.075 and less than 0.15, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.375 and satisfies the following formula (11); r / p is greater than or equal to 0.375 and less than 1.5 and satisfies the following formula (12); r / p is greater than or equal to 0.2 and less than 0.725 and satisfies the following formula (13); and r / p is greater than or equal to 0.725 and less than 1.5 and satisfies the following formula (14). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m is greater than or equal to 50% of the maximum value M.

[0410] [Number 11]

[0411] 1.18×r / p-0.29≤d / p≤4×r / p-0.1…Formula (11)

[0412] 1.18×r / p-0.29≤d / p≤2.17×r / p-0.19…Formula (12)

[0413] 4.79×r / p-1.09≤d / p≤5.07×r / p-0.58…Formula (13)

[0414] 4.79×r / p-1.09≤d / p≤1.8×r / p+1.94…Formula (14)

[0415] Figure 8 It shows that Figures 1 to 5 The display device 1 shown in the table is a table showing the results of a test in which the pitch p of the light emitting parts 13, the width w of the light emitting parts 13, the radius of curvature r and the distance d were set, and the brightness distribution in the direction perpendicular to the second direction d2 was simulated. In the simulation test, the refractive index of the optical sheet 20 was set to 1.50. Figure 8 In particular, the results of the following experiment are shown: based on the determination of the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 in such a way that the value of w / p becomes 0.1, the values ​​of r / p and d / p are changed by changing the radius of curvature r and the distance d, and the distribution of brightness is simulated. Figure 8The meaning of "1" and "0" in the table shown is the same as Figure 7a "1" and "0" in the table shown have the same meaning.

[0416] according to Figure 8 The test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.2 and less than 0.375 and satisfies formula (11); r / p is greater than 0.375 and less than 1.5 and satisfies formula (12); r / p is greater than 0.2 and less than 0.725 and satisfies formula (13); and r / p is greater than 0.725 and less than 1.5 and satisfies formula (14), then the above-mentioned brightness conditions are met.

[0417] When w / p is greater than or equal to 0.15 and less than 0.25, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.725 and satisfies the following formula (15); r / p is greater than or equal to 0.725 and less than 1.5 and satisfies the following formula (16); and r / p is greater than or equal to 0.2 and less than 1.5 and satisfies the following formula (17). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m is greater than or equal to 50% of the maximum value M.

[0418] [Number 12]

[0419] 1.18×r / p-0.29≤d / p≤4.84×r / p-0.45…Formula (15)

[0420] 1.18×r / p-0.29≤d / p≤1.69×r / p+0.6…Formula (16)

[0421] 5.6×r / p-1.84≤d / p≤1.8×r / p+1.94…Formula (17)

[0422] Fig. 9 It shows that Figures 1 to 5 The display device 1 shown in the table is a table showing the results of a test in which the pitch p of the light emitting parts 13, the width w of the light emitting parts 13, the radius of curvature r and the distance d were set, and the brightness distribution in the direction perpendicular to the second direction d2 was simulated. In the simulation test, the refractive index of the optical sheet 20 was set to 1.50. Fig. 9 In particular, the results of the following experiment are shown: based on the determination of the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 in such a way that the value of w / p becomes 0.2, the values ​​of r / p and d / p are changed by changing the radius of curvature r and the distance d, and the distribution of brightness is simulated. Fig. 9 The meaning of "1" and "0" in the table shown is the same as Figure 7a"1" and "0" in the table shown have the same meaning.

[0423] according to Fig. 9 The test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.2 and less than 0.725 and satisfies formula (15); r / p is greater than 0.725 and less than 1.5 and satisfies formula (16); and r / p is greater than 0.2 and less than 1.5 and satisfies formula (17), then the above-mentioned brightness conditions are met.

[0424] When w / p is greater than or equal to 0.25 and less than 0.35, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.25 and less than 0.975 and satisfies the following formula (18); and r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (19). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m is greater than or equal to 50% of the maximum value M.

[0425] [Number 13]

[0426] 1.22×r / p-0.33≤d / p≤4.55×r / p-0.42…Formula (18)

[0427] 1.22×r / p-0.33≤d / p≤1.04×r / p+1.78…Formula (19)

[0428] Fig.10 It shows that Figures 1 to 5 The display device 1 shown in the table is a table showing the results of a test in which the pitch p of the light emitting parts 13, the width w of the light emitting parts 13, the radius of curvature r and the distance d were set, and the brightness distribution in the direction perpendicular to the second direction d2 was simulated. In the simulation test, the refractive index of the optical sheet 20 was set to 1.50. Fig.10 In particular, the results of the following experiment are shown: based on the determination of the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 in such a way that the value of w / p becomes 0.3, the values ​​of r / p and d / p are changed by changing the radius of curvature r and the distance d, and the distribution of brightness is simulated. Fig.10 The meaning of "1" and "0" in the table shown is the same as Figure 7a "1" and "0" in the table shown have the same meaning.

[0429] according to Fig.10The test results shown also show that the above brightness conditions are satisfied if at least one of the following conditions holds: r / p is greater than 0.25 and less than 0.975 and satisfies equation (18); and r / p is greater than 0.975 and less than 1.5 and satisfies equation (19).

[0430] When w / p is greater than or equal to 0.35 and less than or equal to 0.45, it is preferred that r / p is greater than or equal to 0.3 and less than or equal to 1.5 and satisfies the following formula (20). Thus, it is possible to simultaneously satisfy the following conditions: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 when the optical sheet 20 is not overlapped; and the above-mentioned minimum value m is greater than or equal to 50% of the maximum value M.

[0431] [Number 14]

[0432] 1.26×r / p-0.37≤d / p≤5.56×r / p-1.01…Formula (20)

[0433] Fig.11 It shows that Figures 1 to 5 The display device 1 shown in the table is a table showing the results of a test in which the pitch p of the light emitting parts 13, the width w of the light emitting parts 13, the radius of curvature r and the distance d were set, and the brightness distribution in the direction perpendicular to the second direction d2 was simulated. In the simulation test, the refractive index of the optical sheet 20 was set to 1.50. Fig.11 In particular, the results of the following experiment are shown: based on the determination of the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 in such a way that the value of w / p becomes 0.4, the values ​​of r / p and d / p are changed by changing the radius of curvature r and the distance d, and the distribution of brightness is simulated. Fig.11 The meaning of "1" and "0" in the table shown is the same as Figure 7a "1" and "0" in the table shown have the same meaning.

[0434] according to Fig.11 It can be understood from the test results shown that if r / p is greater than or equal to 0.3 and less than 1.5 and satisfies equation (20), the above-mentioned brightness condition is satisfied.

[0435] When w / p is greater than or equal to 0.45 and less than or equal to 0.55, it is preferred that r / p is greater than or equal to 0.4 and less than or equal to 1.5 and satisfies the following formula (21). Thus, it is possible to simultaneously satisfy the following conditions: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 when the optical sheet 20 is not overlapped; and the above-mentioned minimum value m is greater than or equal to 50% of the maximum value M.

[0436] [Number 15]

[0437] 1.28×r / p-0.39≤d / p≤5.83×r / p-1.29…Formula (21)

[0438] Fig.12 It shows that Figures 1 to 5 The display device 1 shown in the table is a table showing the results of a test in which the pitch p of the light emitting parts 13, the width w of the light emitting parts 13, the radius of curvature r and the distance d were set, and the brightness distribution in the direction perpendicular to the second direction d2 was simulated. In the simulation test, the refractive index of the optical sheet 20 was set to 1.50. Fig.12 In particular, the results of the following experiment are shown: based on the determination of the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 in such a way that the value of w / p becomes 0.5, the values ​​of r / p and d / p are changed by changing the curvature radius r and the distance d, and the distribution of brightness is simulated. Fig.12 The meaning of "1" and "0" in the table shown is the same as Figure 7a "1" and "0" in the table shown have the same meaning.

[0439] according to Fig.12 It can be understood from the test results shown that if r / p is greater than or equal to 0.4 and less than 1.5 and satisfies equation (21), the above-mentioned brightness condition is satisfied.

[0440] When w / p is greater than or equal to 0.55 and less than or equal to 0.65, it is preferred that r / p is greater than or equal to 0.45 and less than or equal to 1.5 and satisfies the following formula (22). Thus, the following conditions can be satisfied simultaneously: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 when the optical sheet 20 is not overlapped; and the above-mentioned minimum value m is greater than or equal to 50% of the maximum value M.

[0441] [Number 16]

[0442] 1.38×r / p-0.45≤d / p≤5.8×r / p-1.48…Formula (22)

[0443] Fig.13 It shows that Figures 1 to 5 The display device 1 shown in the table is a table showing the results of a test in which the pitch p of the light emitting parts 13, the width w of the light emitting parts 13, the radius of curvature r and the distance d were set, and the brightness distribution in the direction perpendicular to the second direction d2 was simulated. In the simulation test, the refractive index of the optical sheet 20 was set to 1.50. Fig.13 In particular, the results of the following experiment are shown: based on the determination of the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 in such a way that the value of w / p becomes 0.6, the values ​​of r / p and d / p are changed by changing the radius of curvature r and the distance d, and the distribution of brightness is simulated. Fig.13 The meaning of "1" and "0" in the table shown is the same as Figure 7a"1" and "0" in the table shown have the same meaning.

[0444] according to Fig.13 It can be understood from the test results shown that if r / p is greater than or equal to 0.45 and less than 1.5 and satisfies equation (22), the above-mentioned brightness condition is satisfied.

[0445] r / p may be determined to be greater than 0.2. r / p may be determined to be less than 1.5. d / p may be determined to be greater than 0.1. d / p may be determined to be less than 3.5.

[0446] The following describes matters that are considered as reasons why the display device 1 that can satisfy the above-mentioned brightness conditions can be provided by adjusting the curvature radius r and the distance d according to the values ​​of the pitch p of the light emitting portions 13 and the width w of the light emitting portions 13 as described above.

[0447] Figures 14 to 16 2 is a diagram showing an example of the path of light emitted from the light emitting section 13 of the light emitting substrate 10 when passing through the optical sheet 20. Figures 14 to 16 In the figure, the sealing layer 40, the adhesive layer 50 and the base material layer 60 are omitted. Figures 14 to 16 Both illustrate a state where the display device 1 is viewed from the second direction d2 . Fig.14 An example of the path of light in the case where the ratio of the distance d to the pitch p of the light emitting sections 13 is particularly small is shown. Fig.15 An example of the path of light in the case where the ratio of the distance d to the pitch p of the light emitting sections 13 is particularly large is shown. Fig.16 It shows that the ratio of the distance d to the pitch p of the light emitting portion 13 is greater than Fig.14 The ratio is less than Fig.15 An example of the path of light in the case of a ratio of . Figures 14 to 16 The line denoted by reference numeral L3 shown in the drawings represents the path of light.

[0448] exist Fig.14 In the example shown, the ratio of the distance d to the pitch p of the light emitting parts 13 is particularly small. Fig.14 In the example shown, part of the light emitted from the light emitting unit 13 reaches the lens surface 21a at a small incident angle. Fig.14 In the example shown, the unit lens 21 cannot focus part of the light in the front direction.

[0449] exist Fig.15 In the example shown, the ratio of the distance d to the pitch p of the light emitting section 13 is particularly large. Therefore, part of the light emitted from the light emitting section 13 also reaches the unit lenses 21 other than the unit lenses 21 located in the front direction of the light emitting section 13. Fig.15In the example shown, the unit lens 21 cannot focus part of the light in the front direction.

[0450] In contrast, Fig.16 In the example shown, the ratio of the distance d to the pitch p of the light emitting parts 13 is greater than Fig.14 The ratio is less than Fig.15 Therefore, in Fig.16 In the example shown, it can be considered that: Fig.14 Compared with the example shown in FIG. 1 , less light reaches the lens surface 21a at a smaller incident angle, and Fig.15 Compared with the example shown in FIG. 1 , less light reaches the unit lenses 21 other than the unit lenses 21 located in the front direction of the light emitting unit 13. Fig.16 In the example shown, Fig.14 and Fig.15 Compared with the example shown, the effect of focusing the light emitted from the light emitting portion 13 in the front direction is greater.

[0451] Figures 17a to 17g It shows that Figures 1 to 5 The display device 1 shown is a graph showing the results of a test in which the pitch p of the light emitting parts 13, the width w of the light emitting parts 13, the radius of curvature r and the distance d are appropriately set, and the brightness distribution in the direction perpendicular to the second direction d2 is simulated. In the simulation test, the refractive index of the optical sheet 20 is set to 1.50. Figures 17a to 17g The vertical axis marked with the symbol V represents the brightness by the ratio of the average brightness within the range of -5° to +5° with respect to the front direction (normal direction d4) of the light-emitting substrate 10 in the state where the optical sheet 20 is not overlapped. Figures 17a to 17g The horizontal axis of θ represents an angle θ (°) formed by a direction in which the brightness represented by the vertical axis is observed relative to the front direction (normal direction d4 ) of the display device 1 .

[0452] Figures 17a to 17g The results of an experiment to simulate the brightness distribution of the display device 1 in a direction perpendicular to the second direction d2 when the pitch p of the light emitting portion 13, the width w of the light emitting portion 13, and the radius of curvature r are set to fixed values ​​and the distance d is changed are shown. Figures 17a to 17g , the results of the following experiment are shown: on the basis of determining the pitch p of the light-emitting portion 13, the width w of the light-emitting portion 13 and the curvature radius r in such a way that the value of w / p becomes 0.2 and the value of r / p becomes 0.7, the value of d / p is changed by changing the distance d, and the distribution of brightness is simulated at the same time.

[0453] Fig.17aThe five curves shown respectively represent the brightness distribution when the distance d is determined so that the value of d / p becomes 0.1, 0.2, 0.3, 0.4, or 0.5. Fig.17b The five curves shown show the brightness distribution when the distance d is determined so that the value of d / p becomes 0.6, 0.7, 0.8, 0.9, or 1, respectively. Fig.17c The five curves shown respectively represent the brightness distribution when the distance d is determined so that the value of d / p becomes 1.1, 1.2, 1.3, 1.4, or 1.5. Fig.17d The five curves shown show the brightness distribution when the distance d is determined so that the value of d / p becomes 1.6, 1.7, 1.8, 1.9, or 2, respectively. Fig.17e The five curves shown respectively represent the brightness distribution when the distance d is determined so that the value of d / p becomes 2.1, 2.2, 2.3, 2.4, or 2.5. Fig.17f The five curves shown represent brightness distribution when the distance d is determined so that the value of d / p becomes 2.6, 2.7, 2.8, 2.9, or 3, respectively. Figure 17g The five curves shown respectively represent the brightness distribution when the distance d is determined so that the value of d / p becomes 3.1, 3.2, 3.3, 3.4, or 3.5.

[0454] Reference Figures 17a to 17g , especially at small d / p values Fig.17a In, with Fig.17d Compared with the front direction, the brightness becomes smaller. Fig.17a In the case of the image, the brightness becomes the highest in the direction away from the front direction. This can be considered to reflect the following situation: Fig.14 As shown, since part of the light emitted from the light emitting unit 13 reaches the lens surface 21 a at a small incident angle, the unit lens 21 cannot focus the part of the light in the front direction.

[0455] In addition, especially when the d / p value is large Figure 17g In, with Fig.17d Compared with the above, the brightness in the front direction becomes smaller. Fig.17a The brightness distribution shown has a maximum brightness in the front direction and also has maximum brightness in multiple directions deviating from the front direction. This can be considered to reflect the following situation: Fig.15 As shown, part of the light emitted from the light emitting section 13 also reaches the unit lenses 21 other than the unit lenses 21 located in the front direction of the light emitting section 13 .

[0456] In contrast, the d / p ratio Fig.17a Bigger and bigger Figure 17g Small Fig.17d In, with Fig.17aand Figure 17g Compared with the front direction, the brightness is larger. This can be considered to reflect the following situation: Fig.17d In Fig.16 As shown in the example, Fig.17a and Figure 17g In contrast, the effect of focusing the light emitted from the light emitting portion 13 toward the front direction is greater. In addition, it is considered that the condition of the value of d / p, which increases the effect of focusing the light emitted from the light emitting portion 13 toward the front direction, varies depending on the value of w / p or the curvature radius r.

[0457] Here, the brightness condition of the display device 1 that satisfies the following two conditions at the same time is studied: the brightness of the display device 1 is 150% or more of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the minimum value m is 50% or more of the maximum value M. In order to make the brightness of the display device 1 be 150% or more of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped, as Fig.16 and Fig.17d As shown, it is preferred that the effect of focusing light in the focusing direction (front direction) is greater. On the other hand, in order to make the above-mentioned minimum value m more than 50% of the maximum value M, as shown in FIG. Fig.14 , Fig.15 , Fig.17a as well as Figure 17g As shown, it is preferable that the effect of focusing light in the focusing direction is small. The optical sheet 20 of this embodiment may be designed to reduce the effect of focusing light in the focusing direction in consideration of the brightness condition.

[0458] As described above, by adjusting the radius of curvature r and the distance d according to the values ​​of the pitch p of the light emitting portion 13 and the width w of the light emitting portion 13, the magnitude of the light-collecting effect achieved by the optical sheet 20 can be changed. For example, by adjusting the radius of curvature r and the distance d according to the values ​​of the pitch p of the light emitting portion 13 and the width w of the light emitting portion 13, the effect of collecting light in the collecting direction can be reduced. In addition, by this adjustment, the magnitude of the light-collecting effect achieved by the optical sheet 20 can be increased to the extent that the brightness of the display device 1 becomes 150% or more of the brightness of the light emitting substrate 10 in a state where the optical sheet 20 is not overlapped. In addition, the magnitude of the light-collecting effect achieved by the optical sheet 20 can be reduced to the extent that the above-mentioned minimum value m becomes 50% or more of the maximum value M. Therefore, it can be considered that: as described above, by adjusting the radius of curvature r and the distance d according to the values ​​of the pitch p of the light emitting portion 13 and the width w of the light emitting portion 13, it is possible to provide a display device 1 that can meet the above-mentioned brightness conditions. In particular, it can be considered that the above brightness condition is satisfied in the display device 1 in which the focusing direction of the optical sheet 20 is the front direction of the display device 1. As described above, by adjusting the pitch p of the light emitting portion 13, the width w of the light emitting portion 13, the radius of curvature r, and the distance d, it is possible to increase the brightness in the focusing direction while ensuring the brightness in the direction that is angled with respect to the focusing direction.

[0459] In particular, the inventors of the present application have found the following tendency based on the results of simulation tests: if the pitch p of the light emitting portion 13, the width w of the light emitting portion 13, the radius of curvature r, and the distance d are adjusted as described above, and if the refractive index of the optical sheet 20 is within the range of the refractive index of the general optical sheet 20 provided in the display device 1, it is possible to increase the brightness in the light-collecting direction while ensuring the brightness in the direction at an angle to the light-collecting direction. In particular, it has been found that when the material of the optical sheet 20 is a resin, regardless of the type of the resin, it is possible to stably increase the brightness in the light-collecting direction while ensuring the brightness in the direction at an angle to the light-collecting direction. In addition, the inventors of the present application have found the following tendency based on the results of simulation tests: if the pitch p of the light emitting portion 13, the width w of the light emitting portion 13, the radius of curvature r, and the distance d are adjusted as described above, and if the layer provided between the light emitting substrate 10 and the optical sheet 20 is a layer provided in the general display device 1, it is possible to increase the brightness in the light-collecting direction while ensuring the brightness in the direction at an angle to the light-collecting direction. In particular, the following tendency was found: when no air layer was formed between the light-emitting substrate 10 and the optical sheet 20, the brightness in the light-collecting direction could be stably increased while the brightness in the direction at an angle to the light-collecting direction was ensured regardless of the type of layer provided between the light-emitting substrate 10 and the optical sheet 20. In particular, the following tendency was found: when the above-mentioned sealing layer 40, adhesive layer 50 and base layer 60 were provided between the light-emitting substrate 10 and the optical sheet 20, and the refractive index and thickness of the sealing layer 40, adhesive layer 50 and base layer 60 were within the above-mentioned ranges, the brightness in the light-collecting direction could be stably increased while the brightness in the direction at an angle to the light-collecting direction was ensured.

[0460] In the prior art, the optical sheet is designed to improve the effect of focusing light in the focusing direction. In contrast, the optical sheet 20 of the present embodiment can be designed to reduce the effect of focusing light in the focusing direction as described above. The optical sheet 20 of the present embodiment can also be designed to reduce the effect of focusing light in the focusing direction by adjusting the pitch p of the light emitting portion 13, the width w of the light emitting portion 13, the radius of curvature r and the distance d. The optical sheet 20 of the present embodiment is different from the prior art in terms of including such an idea.

[0461] The display device 1 of this embodiment can also achieve the following effects by adjusting the curvature radius r and the distance d according to the values ​​of the pitch p of the light emitting portion 13 and the width w of the light emitting portion 13 as described above. In the display device 1 that has a greater effect of focusing light in the focusing direction, for example Fig.17dAs shown, in the brightness distribution in the direction perpendicular to the second direction, the width of the peak corresponding to the light-collecting direction of the optical sheet 20 becomes smaller. Therefore, when the position of the optical sheet 20 relative to the light-emitting substrate 10 is offset in the first direction d1, even if the offset is small, the brightness in the light-collecting direction of the optical sheet 20 is greatly reduced. In contrast, the display device 1, which adjusts the radius of curvature r and the distance d according to the values ​​corresponding to the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 as described above, suppresses the effect of focusing light in the light-collecting direction from becoming too large. Therefore, even if the position of the optical sheet 20 relative to the light-emitting substrate 10 is offset, the brightness in the light-collecting direction of the optical sheet 20 is difficult to decrease. As a result, the alignment accuracy required when the optical sheet 20 is mounted relative to the light-emitting substrate 10 can be suppressed to a small level.

[0462] In addition, the display device 1 of the present embodiment can also exert the following effects by adjusting the curvature radius r and the distance d according to the values ​​of the pitch p of the light-emitting section 13 and the width w of the light-emitting section 13 as described above. In particular, consider a case where one of the unit lenses 21 overlaps with the first light-emitting section 13R and the second light-emitting section 13G that emits light of a wavelength different from that of the first light-emitting section 13R in the normal direction d4. Here, the refractive index of the lens surface 21a of the unit lens 21 is different according to the wavelength of the light. Therefore, the magnitude of the effect of focusing light in the focusing direction achieved by the optical sheet 20 varies according to the wavelength of the light. Thus, for example, even if the first light-emitting section 13R and the second light-emitting section 13G emit light in the same brightness in the focusing direction, the brightness in the focusing direction after passing through the optical sheet 20 will also vary. In addition, the greater the effect of focusing light in the focusing direction itself, the greater the difference in the focusing effect corresponding to the wavelength of the light. In contrast, in the display device 1 in which the curvature radius r and the distance d are adjusted according to the values ​​of the pitch p of the light emitting portion 13 and the width w of the light emitting portion 13 as described above, the effect of focusing the light in the focusing direction is suppressed so as not to become too large. Therefore, the difference in the focusing effect corresponding to the wavelength of the light can be suppressed to be small. Thus, for example, on the basis of controlling the light emission of the first light emitting portion 13R and the second light emitting portion 13G, even without considering the difference in the focusing effect corresponding to the wavelength of the light, the ratio of the brightness of the light emitted by the display device 1 at each wavelength can be fully controlled.

[0463] Next, an example of a method for manufacturing the above-mentioned display device 1 is described. First, the light emitting substrate 10 is prepared. In addition, the sealing layer 40 is formed so as to cover the surface of the light emitting substrate 10 on which the light emitting section 13 is provided.

[0464] In addition, an optical sheet 20 is manufactured. In the manufacture of the optical sheet 20, a substrate layer 60 and an optical sheet 20 having a main body 23 and a plurality of unit lenses 21 disposed on the substrate layer 60 are prepared. The optical sheet 20 having the main body 23 and the unit lenses 21 can be manufactured by integrally manufacturing the main body 23 and the unit lenses 21 using resin molding. It should be noted that, after the main body 23 is disposed on the substrate layer 60, a plurality of unit lenses 21 are disposed on the main body 23, thereby disposing the optical sheet 20 on the substrate layer 60. In this case, the main body 23 can be manufactured by molding a resin, or by subjecting a resin plate to mechanical processing such as cutting, or by combining resin molding and mechanical processing such as cutting.

[0465] Next, the sealing layer 40 formed so as to cover the surface of the light emitting substrate 10 provided with the light emitting unit 13 and the base material layer 60 provided with the optical sheet 20 are bonded via the adhesive layer 50. In this way, a Figures 1 to 5 The display device 1 is shown.

[0466] In addition, in the manufacturing method of the display device 1 of the present embodiment, as described above, the radius of curvature r and the distance d are adjusted according to the value of w / p. That is, the manufacturing method of the display device 1 of the present embodiment has an adjustment step of adjusting the radius of curvature r and the distance d according to the value of w / p. The adjustment of the radius of curvature r can be performed by adjusting the radius of curvature r of the manufactured unit lens 21 when manufacturing the optical sheet 20. The adjustment of the distance d can be performed by adjusting the thickness of at least any one of the manufactured sealing layer 40, adhesive layer 50, substrate layer 60 and main body 23 of the optical sheet 20.

[0467] In the adjustment process of the present embodiment, when w / p is less than 0.025, the radius of curvature r and the distance d are adjusted so that at least any one of the following conditions is satisfied: r / p is greater than 0.2 and less than 0.525 and satisfies the above-mentioned formula (1); r / p is greater than 0.525 and less than 1.5 and satisfies the above-mentioned formula (2); r / p is greater than 0.2 and less than 0.525 and satisfies the above-mentioned formula (3); r / p is greater than 0.525 and less than 0.725 and satisfies the above-mentioned formula (4); and r / p is greater than 0.725 and less than 1.5 and satisfies the above-mentioned formula (5).

[0468] In the adjustment process of the present embodiment, when w / p is greater than or equal to 0.025 and less than 0.075, the radius of curvature r and the distance d are adjusted so that at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the above-mentioned formula (6); r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the above-mentioned formula (7); r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the above-mentioned formula (8); r / p is greater than or equal to 0.525 and less than 0.725 and satisfies the above-mentioned formula (9); and r / p is greater than or equal to 0.725 and less than 1.5 and satisfies the above-mentioned formula (10).

[0469] In the adjustment process of the present embodiment, when w / p is greater than or equal to 0.075 and less than 0.15, the curvature radius r and the distance d are adjusted so that at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.375 and satisfies the above-mentioned formula (11); r / p is greater than or equal to 0.375 and less than 1.5 and satisfies the above-mentioned formula (12); r / p is greater than or equal to 0.2 and less than 0.725 and satisfies the above-mentioned formula (13); and r / p is greater than or equal to 0.725 and less than 1.5 and satisfies the above-mentioned formula (14).

[0470] In the adjustment process of this embodiment, when w / p is greater than 0.15 and less than 0.25, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is met: r / p is greater than 0.2 and less than 0.725 and satisfies the above-mentioned formula (15); r / p is greater than 0.725 and less than 1.5 and satisfies the above-mentioned formula (16); and r / p is greater than 0.2 and less than 1.5 and satisfies the above-mentioned formula (17).

[0471] In the adjustment process of this embodiment, when w / p is greater than 0.25 and less than 0.35, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is met: r / p is greater than 0.25 and less than 0.975 and satisfies the above formula (18); and r / p is greater than 0.975 and less than 1.5 and satisfies the above formula (19).

[0472] In the adjustment step of this embodiment, when w / p is 0.35 or more and less than 0.45, the curvature radius r and the distance d are adjusted so that r / p is 0.3 or more and less than 1.5 and the above-mentioned formula (20) is satisfied.

[0473] In the adjustment step of this embodiment, when w / p is 0.45 or more and less than 0.55, the curvature radius r and the distance d are adjusted so that r / p is 0.4 or more and less than 1.5 and the above-mentioned formula (21) is satisfied.

[0474] In the adjustment step of this embodiment, when w / p is 0.55 or more and less than 0.65, the curvature radius r and the distance d are adjusted so that r / p is 0.45 or more and less than 1.5 and the above-mentioned formula (22) is satisfied.

[0475] According to the manufacturing method of the display device 1 of this embodiment having the above adjustment process, a display device 1 that simultaneously satisfies the following conditions can be manufactured: the brightness is greater than 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m is greater than 50% of the maximum value M.

[0476] In addition, various changes can be made to the above-mentioned embodiment. Hereinafter, an example of a modification is described with reference to the accompanying drawings. In the following description and the accompanying drawings used in the following description, for parts that can be constructed in the same manner as the above-mentioned specific example, the same reference numerals as those used for the corresponding parts in the above-mentioned specific example are sometimes used, and repeated descriptions are omitted. In addition, in the case where it is obvious that the effects obtained in the above-mentioned embodiment can also be obtained in the modification, the description thereof is sometimes omitted.

[0477] (Variant 1)

[0478] In the above-mentioned embodiment, Figure 6 The display device 1 is described in the above description in which the minimum value m is 50% or more of the maximum value M. However, the brightness condition of the display device 1 is not limited to this. Figure 6 In the brightness distribution shown, the maximum value of the brightness in the range of an angle of not less than -10° and not more than +10° with respect to the focusing direction of the optical sheet 20 (angle θ with respect to the front direction of the display device 1) is set as M2. The maximum value M2 corresponds to the maximum value of the brightness in the direction of the display device 1 that is perpendicular to the second direction d2 and that is not less than -10° and not more than +10° with respect to the focusing direction of the optical sheet 20. Figure 6 In the brightness distribution shown, the minimum value of the brightness in the range of -10° to +10° with respect to the focusing direction of the optical sheet 20 (angle θ with respect to the front direction of the display device 1) is set as m2. The minimum value m2 corresponds to the minimum value of the brightness in the direction of the display device 1 that is perpendicular to the second direction d2 and that is -10° to +10° with respect to the focusing direction of the optical sheet 20. Here, in this modification, as one of the conditions of the brightness of the display device 1, it is determined as follows: Figure 6The minimum value m2 shown is greater than 50% of the maximum value M2. Thus, when the user visually recognizes the display device 1, the brightness in the direction of the display device 1 can be ensured when the angle between the direction of the user's line of sight of the display device 1 and the focusing direction of the optical sheet 20 is greater than -10° and less than +10° during observation from the second direction d2.

[0479] By setting the minimum value m2 to be 50% or more of the maximum value M2, the following effects can be obtained compared to the case where the minimum value m is set to be 50% or more of the maximum value M as in the above-mentioned embodiment. When the angle between the direction of the line of sight of the user visually recognizing the display device 1 and the light-collecting direction of the optical sheet 20 is -10° or more and +10° or less in observation from the second direction d2, the brightness in the direction in which the user visually recognizes the display device 1 can be ensured. Therefore, the brightness of the display device 1 can be ensured at a wider viewing angle. In addition, by setting the minimum value m2 to be 50% or more of the maximum value M2, the width of the peak corresponding to the light-collecting direction of the optical sheet 20 in the brightness distribution in the direction perpendicular to the second direction becomes larger than the case where the minimum value m is set to be 50% or more of the maximum value M. Therefore, when the minimum value m2 is set to be 50% or more of the maximum value M2, when the position of the optical sheet 20 relative to the light-emitting substrate 10 is offset in the first direction d1, the brightness in the light-collecting direction of the optical sheet 20 is less likely to decrease. Thereby, the positioning accuracy required when attaching the optical sheet 20 to the light emitting substrate 10 can be suppressed to be low.

[0480] In this modification, as in the above-mentioned embodiment, the brightness of the display device 1 is determined to be 150% or more of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped. As the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped, the average value of the brightness in the range of -10° or more and +10° or less of the angle θ formed by the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped with the front direction (normal direction d4) can be used. That is, in Modification 1, as the conditions for the brightness of the display device 1, the brightness of the display device 1 is determined to be 150% or more of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped, and the above-mentioned minimum value m2 is 50% or more of the maximum value M2. As a result, the following effects can be obtained. By making the brightness in the light-collecting direction of the optical sheet 20 150% or more of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped, the brightness in the light-collecting direction of the optical sheet 20 can be sufficiently increased. Thus, when the user visually recognizes the display device 1 from the front direction, the brightness visually recognized by the user can be sufficiently increased. Moreover, by making the above-mentioned minimum value m more than 50% of the maximum value M, the brightness of the display device 1 in the direction at an angle of more than -10° and less than +10° relative to the focusing direction of the optical sheet 20 can be made at least 75% or more of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped. Thus, when the user visually recognizes the display device 1 from a direction at an angle of more than -10° and less than +10° relative to the focusing direction of the optical sheet 20, the brightness visually recognized by the user can be sufficiently increased. According to the above scheme, the visibility of the display of the display device 1 can be fully ensured when the user visually recognizes the display device 1 from a direction at an angle of more than -10° and less than +10° relative to the focusing direction of the optical sheet 20. The display device 1 that satisfies the brightness condition in the above-mentioned modification example 1 is particularly suitable for use as a head-up display. The display device 1 satisfying the brightness condition in the above-described first modification is particularly suitable for use as a head-up display that projects an image onto a windshield of a car.

[0481] Hereinafter, for each value of w / p, conditions for the values ​​of the radius of curvature r and the distance d that can satisfy the brightness condition in the above-mentioned modification 1 are described. In particular, conditions for the values ​​of the radius of curvature r and the distance d that satisfy the brightness condition in the modification 1 in the display device 1 in which the focusing direction of the optical sheet 20 is the front direction of the display device 1 are described.

[0482] When w / p is less than 0.025, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (23); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (24). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m2 is greater than or equal to 50% of the maximum value M2.

[0483] [Number 17]

[0484] 1.18×r / p-0.29≤d / p≤1×r / p-0.02…Formula (23)

[0485] 1.18×r / p-0.29≤d / p≤1.33×r / p+0.15…Formula (24)

[0486] Fig.18a It shows that Figures 1 to 5 The display device 1 shown in the table is a table showing the results of a test in which the pitch p of the light emitting parts 13, the width w of the light emitting parts 13, the radius of curvature r and the distance d were set, and the brightness distribution in the direction perpendicular to the second direction d2 was simulated. In the simulation test, the refractive index of the optical sheet 20 was set to 1.50. Fig.18a In particular, the results of the following experiment are shown: based on the determination of the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 in such a way that the value of w / p becomes 0.01, the values ​​of r / p and d / p are changed by changing the curvature radius r and the distance d, and the distribution of brightness is simulated. Fig.18a "1" in the table shown means that under the corresponding r / p and d / p values, the brightness of the display device 1 is 150% or more of the brightness of the light-emitting substrate 10 in the state where the optical sheet 20 is not overlapped, and the above-mentioned minimum value m2 is 50% or more of the maximum value M2. For example, "1" is marked in the column where r / p is 0.2 and d / p is 0.1 in the table. This means that the result of determining the curvature radius r and the distance d so that r / p becomes 0.2 and d / p becomes 0.1 and simulating the distribution of brightness is that the brightness condition in the above-mentioned modification example 1 is satisfied. Fig.18aThe "0" in the table shown means that at the corresponding r / p and d / p values, at least one of the following conditions is not satisfied: the brightness of the display device 1 is 150% or more of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped, and the minimum value m2 is 50% or more of the maximum value M2. For example, "0" is marked in the column where r / p is 0.2 and d / p is 0.3 in the table. This means that the result of simulating the distribution of brightness by determining the radius of curvature r and the distance d so that r / p becomes 0.2 and d / p becomes 0.3 is that the brightness condition in the above-mentioned modification example 1 is not satisfied.

[0487] according to Fig.18a The test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.2 and less than 0.525 and satisfies formula (23); and r / p is greater than 0.525 and less than 1.5 and satisfies formula (24), then the brightness condition in the above-mentioned variant example 1 is met.

[0488] When w / p is greater than or equal to 0.025 and less than 0.15, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (25); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (26). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m2 is greater than or equal to 50% of the maximum value M2.

[0489] [Number 18]

[0490] 1.18×r / p-0.29≤d / p≤1.14×r / p-0.04…Formula (25)

[0491] 1.18×r / p-0.29≤d / p≤1.3×r / p+0.18…Formula (26)

[0492] Fig.18b It shows that Figures 1 to 5 The display device 1 shown in the table is a table showing the results of a test in which the pitch p of the light emitting parts 13, the width w of the light emitting parts 13, the radius of curvature r and the distance d were set, and the brightness distribution in the direction perpendicular to the second direction d2 was simulated. In the simulation test, the refractive index of the optical sheet 20 was set to 1.50. Fig.18b In particular, the results of the following experiment are shown: based on the determination of the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 in such a way that the w / p value becomes 0.05, the values ​​of r / p and d / p are changed by changing the curvature radius r and the distance d, and the distribution of brightness is simulated. Fig.18b The meaning of "1" and "0" in the table shown is the same as Fig.18a "1" and "0" in the table shown have the same meaning.

[0493] Fig.18c It shows that Figures 1 to 5 The display device 1 shown in the table is a table showing the results of a test in which the pitch p of the light emitting parts 13, the width w of the light emitting parts 13, the radius of curvature r and the distance d were set, and the brightness distribution in the direction perpendicular to the second direction d2 was simulated. In the simulation test, the refractive index of the optical sheet 20 was set to 1.50. Fig.18c In particular, the results of the following experiment are shown: based on the determination of the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 in such a way that the value of w / p becomes 0.1, the values ​​of r / p and d / p are changed by changing the radius of curvature r and the distance d, and the distribution of brightness is simulated. Fig.18c The meaning of "1" and "0" in the table shown is the same as Fig.18a "1" and "0" in the table shown have the same meaning.

[0494] according to Fig.18b and Fig.18c The test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.2 and less than 0.525 and satisfies formula (25); and r / p is greater than 0.525 and less than 1.5 and satisfies formula (26), then the brightness condition in the above-mentioned variant example 1 is satisfied.

[0495] When w / p is greater than or equal to 0.15 and less than or equal to 0.25, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than or equal to 0.525 and satisfies the following formula (27); and r / p is greater than or equal to 0.525 and less than or equal to 1.5 and satisfies the following formula (28). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 when the optical sheet 20 is not overlapped; and the above-mentioned minimum value m2 is greater than or equal to 50% of the maximum value M2.

[0496] [Number 19]

[0497] 1.18×r / p-0.29≤d / p≤-0.29×r / p+0.73…Formula (27)

[0498] 1.18×r / p-0.29≤d / p≤1.29×r / p+0.28…Formula (28)

[0499] Fig.19 It shows that Figures 1 to 5The display device 1 shown in the table is a table showing the results of a test in which the pitch p of the light emitting parts 13, the width w of the light emitting parts 13, the radius of curvature r and the distance d were set, and the brightness distribution in the direction perpendicular to the second direction d2 was simulated. In the simulation test, the refractive index of the optical sheet 20 was set to 1.50. Fig.19 In particular, the results of the following experiment are shown: based on the determination of the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 in such a way that the value of w / p becomes 0.2, the values ​​of r / p and d / p are changed by changing the radius of curvature r and the distance d, and the distribution of brightness is simulated. Fig.19 The meaning of "1" and "0" in the table shown is the same as Fig.18a "1" and "0" in the table shown have the same meaning.

[0500] according to Fig.19 The test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.2 and less than 0.525 and satisfies equation (27); and r / p is greater than 0.525 and less than 1.5 and satisfies equation (28), then the brightness condition in the above-mentioned variant example 1 is satisfied.

[0501] When w / p is greater than or equal to 0.25 and less than or equal to 0.35, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.25 and less than or equal to 0.425 and satisfies the following formula (29); and r / p is greater than or equal to 0.425 and less than or equal to 1.5 and satisfies the following formula (30). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 when the optical sheet 20 is not overlapped; and the above-mentioned minimum value m2 is greater than or equal to 50% of the maximum value M2.

[0502] [Number 20]

[0503] 1.22×r / p-0.33≤d / p≤4.6×r / p-0.52…Formula ((29)

[0504] 1.22×r / p-0.33≤d / p≤1.23×r / p+0.38…Formula (30)

[0505] Fig. 20 It shows that Figures 1 to 5 The display device 1 shown in the table is a table showing the results of a test in which the pitch p of the light emitting parts 13, the width w of the light emitting parts 13, the radius of curvature r and the distance d were set, and the brightness distribution in the direction perpendicular to the second direction d2 was simulated. In the simulation test, the refractive index of the optical sheet 20 was set to 1.50. Fig. 20In particular, the results of the following experiment are shown: based on the determination of the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 in such a way that the value of w / p becomes 0.3, the values ​​of r / p and d / p are changed by changing the radius of curvature r and the distance d, and the distribution of brightness is simulated. Fig. 20 The meaning of "1" and "0" in the table shown is the same as Fig.18a "1" and "0" in the table shown have the same meaning.

[0506] according to Fig. 20 The test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.25 and less than 0.425 and satisfies equation (29); and r / p is greater than 0.425 and less than 1.5 and satisfies equation (30), then the brightness condition in the above-mentioned variant example 1 is satisfied.

[0507] When w / p is greater than or equal to 0.35 and less than 0.45, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.3 and less than 0.525 and satisfies the following formula (31); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (32). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m2 is greater than or equal to 50% of the maximum value M2.

[0508] [Number 21]

[0509] 1.26×r / p-0.37≤d / p≤5.4×r / p-0.96…Formula (31)

[0510] 1.26×r / p-0.37≤d / p≤0.77×r / p+1.08…Formula (32)

[0511] Fig.21 It shows that Figures 1 to 5 The display device 1 shown in the table is a table showing the results of a test in which the pitch p of the light emitting parts 13, the width w of the light emitting parts 13, the radius of curvature r and the distance d were set, and the brightness distribution in the direction perpendicular to the second direction d2 was simulated. In the simulation test, the refractive index of the optical sheet 20 was set to 1.50. Fig.21 In particular, the results of the following experiment are shown: based on the determination of the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 in such a way that the value of w / p becomes 0.4, the values ​​of r / p and d / p are changed by changing the radius of curvature r and the distance d, and the distribution of brightness is simulated. Fig.21 The meaning of "1" and "0" in the table shown is the same as Fig.18a "1" and "0" in the table shown have the same meaning.

[0512] according to Fig.21 The test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.3 and less than 0.525 and satisfies formula (31); and r / p is greater than 0.525 and less than 1.5 and satisfies formula (32), then the brightness condition in the above-mentioned variant example 1 is satisfied.

[0513] When w / p is greater than or equal to 0.45 and less than or equal to 0.55, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.4 and less than or equal to 0.625 and satisfies the following formula (33); and r / p is greater than or equal to 0.625 and less than or equal to 1.5 and satisfies the following formula (34). Thus, it is possible to simultaneously satisfy the following conditions: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m2 is greater than or equal to 50% of the maximum value M2.

[0514] [Number 22]

[0515] 1.28×r / p-0.39≤d / p≤5.83×r / p-1.29…Formula (33)

[0516] 1.28×r / p-0.39≤d / p≤0.4×r / p+1.77…Formula (34)

[0517] Fig. 22 It shows that Figures 1 to 5 The display device 1 shown in the table is a table showing the results of a test in which the pitch p of the light emitting parts 13, the width w of the light emitting parts 13, the radius of curvature r and the distance d were set, and the brightness distribution in the direction perpendicular to the second direction d2 was simulated. In the simulation test, the refractive index of the optical sheet 20 was set to 1.50. Fig. 22 In particular, the results of the following experiment are shown: based on the determination of the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 in such a way that the value of w / p becomes 0.5, the values ​​of r / p and d / p are changed by changing the curvature radius r and the distance d, and the distribution of brightness is simulated. Fig. 22 The meaning of "1" and "0" in the table shown is the same as Fig.18a "1" and "0" in the table shown have the same meaning.

[0518] according to Fig. 22 The test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.4 and less than 0.625 and satisfies formula (33); and r / p is greater than 0.625 and less than 1.5 and satisfies formula (34), then the brightness condition in the above-mentioned variant example 1 is satisfied.

[0519] When w / p is greater than or equal to 0.55 and less than 0.65, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.45 and less than 0.625 and satisfies the following formula (35); and r / p is greater than or equal to 0.625 and less than 1.5 and satisfies the following formula (36). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m2 is greater than or equal to 50% of the maximum value M2.

[0520] [Number 23]

[0521] 1.38×r / p-0.45≤d / p≤7.6×r / p-2.44…Formula (35)

[0522] 1.38×r / p-0.45≤d / p≤0.26×r / p+2.29…Formula (36) Fig.23 It shows that Figures 1 to 5 The display device 1 shown in the table is a table showing the results of a test in which the pitch p of the light emitting parts 13, the width w of the light emitting parts 13, the radius of curvature r and the distance d were set, and the brightness distribution in the direction perpendicular to the second direction d2 was simulated. In the simulation test, the refractive index of the optical sheet 20 was set to 1.50. Fig.23 In particular, the results of the following experiment are shown: based on the determination of the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 in such a way that the value of w / p becomes 0.6, the values ​​of r / p and d / p are changed by changing the radius of curvature r and the distance d, and the distribution of brightness is simulated. Fig.23 The meaning of "1" and "0" in the table shown is the same as Fig.18a "1" and "0" in the table shown have the same meaning.

[0523] according to Fig.23 The test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.45 and less than 0.625 and satisfies formula (35); and r / p is greater than 0.625 and less than 1.5 and satisfies formula (36), then the brightness condition in the above-mentioned variant example 1 is satisfied.

[0524] Next, an example of a method for manufacturing the display device 1 according to Modification 1 is described. The method for manufacturing the display device 1 according to Modification 1 includes an adjustment step of adjusting the curvature radius r and the distance d according to the value of w / p, similarly to the display device 1 according to the above-described embodiment.

[0525] In the adjustment process of variant example 1, when w / p is less than 0.025, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is met: r / p is greater than 0.2 and less than 0.525 and satisfies the above-mentioned formula (23); and r / p is greater than 0.525 and less than 1.5 and satisfies the above-mentioned formula (24).

[0526] In the adjustment process of variant example 1, when w / p is greater than 0.025 and less than 0.15, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is met: r / p is greater than 0.2 and less than 0.525 and satisfies the above-mentioned formula (25); and r / p is greater than 0.525 and less than 1.5 and satisfies the above-mentioned formula (26).

[0527] In the adjustment process of variant example 1, when w / p is greater than 0.15 and less than 0.25, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is met: r / p is greater than 0.2 and less than 0.525 and satisfies the above-mentioned formula (27); and r / p is greater than 0.525 and less than 1.5 and satisfies the above-mentioned formula (28).

[0528] In the adjustment process of variant example 1, when w / p is greater than 0.25 and less than 0.35, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is met: r / p is greater than 0.25 and less than 0.425 and satisfies the above-mentioned formula (29); and r / p is greater than 0.425 and less than 1.5 and satisfies the above-mentioned formula (30).

[0529] In the adjustment process of variant example 1, when w / p is greater than 0.35 and less than 0.45, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is met: r / p is greater than 0.3 and less than 0.525 and satisfies the above-mentioned formula (31); and r / p is greater than 0.525 and less than 1.5 and satisfies the above-mentioned formula (32).

[0530] In the adjustment process of variant example 1, when w / p is greater than 0.45 and less than 0.55, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is met: r / p is greater than 0.4 and less than 0.625 and satisfies the above-mentioned formula (33); and r / p is greater than 0.625 and less than 1.5 and satisfies the above-mentioned formula (34).

[0531] In the adjustment process of variant example 1, when w / p is greater than 0.55 and less than 0.65, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is met: r / p is greater than 0.45 and less than 0.625 and satisfies the above-mentioned formula (35); and r / p is greater than 0.625 and less than 1.5 and satisfies the above-mentioned formula (36).

[0532] According to the manufacturing method of the display device 1 of the modification example 1 having the above adjustment process, it is possible to manufacture a display device 1 that satisfies the following conditions at the same time: the brightness is 150% or more of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m2 is 50% or more of the maximum value M2. In particular, in the display device 1 in which the light-collecting direction of the optical sheet 20 is the front direction of the display device 1, it can be considered that the brightness condition in the modification example 1 is satisfied. As described above, by adjusting the pitch p of the light-emitting portion 13, the width w of the light-emitting portion 13, the radius of curvature r, and the distance d as shown in the modification example 1, it is also possible to increase the brightness in the light-collecting direction while ensuring the brightness in the direction that is angled with respect to the light-collecting direction.

[0533] (Variant 2)

[0534] In the above-described embodiment and modification, the display device 1 is shown in which the optical sheet 20 is used to collect light emitted from the light emitting substrate 10 and diffused in the direction perpendicular to the second direction d2 toward the front direction of the display device 1. However, the direction in which light is collected in the display device 1 is not limited to this.

[0535] Fig.24a 3 is a cross-sectional view showing a cross section perpendicular to the second direction d2 of the display device 1 according to the second modification. Fig.24a The line denoted by reference numeral L4 shows an example of a path of light emitted from the light emitting section 13 of the light emitting substrate 10 in the second modification when passing through the optical sheet 20 .

[0536] In variant example 2, when observing from the normal direction d4 of the plate surface of the light-emitting substrate 10, the center C2 of one of the unit lenses 21 in the first direction d1 is offset from the center C1 of the light-emitting portion 13 of the unit area 10a in the second direction column 10c constituting the corresponding unit area in the second direction column 10c. In variant example 2, the center C2 of each unit lens 21 in the first direction d1 is offset from the center C1 of the light-emitting portion 13 of the unit area 10a in the first direction d1 constituting each corresponding unit area in the second direction column 10c. This can also be understood from the following situation: Fig.24aIn the figure, a center C2 of a unit lens 21 in the first direction d1 and a center C1 of the light-emitting portion 13 of the unit area 10a in the second direction column 10c constituting the corresponding unit area 10c in the second direction column 10c do not overlap in the normal direction d4.

[0537] In Modification 2, as described above, the center C2 is offset from the center C1, and thus the light emitted from the light emitting substrate 10 and diffused in the direction perpendicular to the second direction d2 is converged in the direction d3 perpendicular to the second direction d2 and forming an angle with the front direction (normal direction d4) of the display device 1. The direction d3 in which the light emitted from the light emitting substrate 10 is converged can be adjusted by changing the magnitude of the offset of the center C2 relative to the center C1 in the first direction d1. Figure 24b It shows that Fig.24a The graph shown is an example of the result of a test for simulating the brightness distribution in the direction perpendicular to the second direction d2 of the display device 1. In the simulation test, the refractive index of the optical sheet 20 was set to 1.50. Figure 24b The vertical axis marked with the symbol V represents the brightness by the ratio of the average value of the brightness within the range of an angle θ of greater than -5° and less than +5° relative to the front direction (normal direction d4) of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped. Figure 24b The horizontal axis of represents the angle θ (°) formed by the direction in which the brightness shown on the vertical axis is observed relative to the front direction (normal direction d4) of the display device 1. Figure 24b In the embodiment of FIG. 1 , the light emitted from the light emitting substrate 10 is focused in a direction d3 that forms an angle θ1 with respect to the front direction. In other words, the direction d3 is the focusing direction of the optical sheet 20 .

[0538] In addition, Fig.24a In the example shown, the display device 1 further includes a light angle adjustment layer 70. The light angle adjustment layer 70 is located on the second surface 20b side of the optical sheet 20. Fig.24aIn the example shown, the light angle adjustment layer 70 is opposite to the second surface 20b of the optical sheet 20. The light angle adjustment layer 70 adjusts the angle of the traveling direction of the light from the optical sheet 20 relative to the normal direction d4 of the plate surface of the light-emitting substrate 10. As an example, the light angle adjustment layer 70 adjusts the angle of the traveling direction of the light from the optical sheet 20 relative to the normal direction d4 in the following manner: the traveling direction changes when observed from the first direction d1. As an example of such a light angle adjustment layer 70, there can be cited a light angle adjustment layer 70 having the following function: light that is emitted from the light-emitting substrate 10 and diffuses in the direction perpendicular to the first direction d1 and passes through the optical sheet 20 is focused in a direction perpendicular to the surface of the light angle adjustment layer 70. With such a light angle adjustment layer 70, the traveling direction of the light observed from the first direction d1 can be directed toward a direction perpendicular to the surface of the light angle adjustment layer 70.

[0539] In addition, the manner in which the light angle adjustment layer 70 adjusts the angle of the traveling direction of light relative to the normal direction d4 is not limited to the above-mentioned manner. The light angle adjustment layer 70 may also adjust the angle of the traveling direction of light from the optical sheet 20 relative to the normal direction d4 in the following manner: the traveling direction changes when observed from the second direction d2. In addition, the light angle adjustment layer 70 may also adjust the angle of the traveling direction of light from the optical sheet 20 relative to the normal direction d4 in the following manner: the traveling direction changes when observed from a direction intersecting the first direction d1 and the second direction d2. In addition, the display device 1 may also include a plurality of light angle adjustment layers 70, the plurality of light angle adjustment layers 70 including: a first light angle adjustment layer 70 that adjusts the angle of the traveling direction of light relative to the normal direction d4 so that the traveling direction changes when observed from a certain direction; and a second light angle adjustment layer 70 that adjusts the angle of the traveling direction of light relative to the normal direction d4 so that the traveling direction changes when observed from another direction intersecting the certain direction.

[0540] As an example, the light angle adjustment layer 70 is a louver. As a specific example, the case where the light angle adjustment layer 70 is a louver having the following function is described: the function is to focus the light diffused in the direction perpendicular to the first direction d1 in the direction perpendicular to the surface of the light angle adjustment layer 70. In this case, the louver has a plurality of light absorbing parts extending in the first direction d1, and a plurality of light transmitting parts extending in the first direction d1. The light absorbing parts and the light transmitting parts are arranged staggered with respect to the second direction d2. The light absorbing part of the louver has an inclined surface inclined relative to the normal direction d4, and the inclined surface can reflect the light diffused in the direction perpendicular to the first direction d1 in the direction perpendicular to the surface of the light angle adjustment layer 70. In this case, the light non-perpendicular to the second direction d2 is reflected by the inclined surface of the light absorbing part, thereby focusing the light in the direction perpendicular to the surface of the light angle adjustment layer 70.

[0541] In the display device 1, there may be a case where the direction in which the user is visually recognizing the display device 1 is not the front direction of the display device 1. Here, in Modification 2, the light emitted from the light emitting substrate 10 is focused in a direction d3 that is angled with respect to the front direction of the display device 1. Thus, even in the case in which the direction in which the user is visually recognizing the display device 1 is not the front direction of the display device 1, by making the direction d3 coincide with the direction, the light can be focused in the direction.

[0542] The display device 1 of the second modification can be appropriately used as a head-up display. The display device 1 of the second modification is particularly suitable for use as a head-up display for projecting images onto the windshield of a car. The following describes the effects of using the display device 1 of the second modification as a head-up display for projecting images onto the windshield of a car.

[0543] Fig.25 1 is a diagram showing an example of a case where the display device 1 is used as a head-up display for projecting an image onto a front windshield 91 of a car 90. Fig.25 In the embodiment, the display device 1 is arranged such that the second direction d2 is oriented in a direction perpendicular to the front-rear direction of the automobile 90 and perpendicular to the up-down direction of the automobile 90. Fig.25 FIG. 2 shows a state where the display device 1 and the automobile 90 are viewed from the second direction d2 of the display device 1. Fig.25 In FIG. 1 , regarding the display device 1 , illustration of components of the display device 1 such as the light emitting substrate 10 and the optical sheet 20 is omitted, and only a schematic shape of the display device 1 is illustrated. Fig.25 The line denoted by reference numeral L6 shows an example of a hypothetical path of light emitted from the display device 1 .

[0544] In the display device 1 as Fig.25When used as a head-up display of a car 90 as shown, it can be said that the user H visually recognizes the image displayed on the display device 1 through the front windshield 91. In this case, the direction d6 of the assumed path L6 from the display device 1 to the front windshield 91, which is a presumed path from the display device 1 to the front windshield 91, can be regarded as the direction in which the user visually recognizes the display device 1. Fig.25 When used as a head-up display of a car 90 as shown, the display device 1 needs to be arranged in a limited space in the car 90, so the angle at which the display device 1 can be arranged is sometimes limited. In addition, there is also a case where the angle of the front windshield 91 for the display device 1 to project an image cannot be freely designed only from the viewpoint of facilitating the projection of an image through the display device 1.

[0545] Here, according to the display device 1 of variant example 2, even if the angle at which the display device 1 can be configured or the angle of the front windshield 91 is limited, the user H can see the image through the front windshield 91 by adjusting the direction d3 in which the light emitted from the light-emitting substrate 10 is focused.

[0546] Furthermore, when the display device 1 that focuses light emitted from the light emitting substrate 10 is used as a head-up display of a general automobile 90 , it is also possible to prevent the light from the display device 1 from directly reaching the eyes of the user H without passing through the front windshield 91 .

[0547] (Variant 3)

[0548] In the above-mentioned modification 2, the display device 1 is described in which the center C2 is offset from the center C1, thereby focusing the light emitted from the light emitting substrate 10 in the direction d3 which is angled with respect to the front direction of the display device 1. However, the form of the display device 1 which focuses the light emitted from the light emitting substrate 10 in the direction which is angled with respect to the front direction of the display device 1 is not limited to this.

[0549] Fig.26a 3 is a cross-sectional view showing a cross section perpendicular to the second direction d2 of the display device 1 according to Modification 3. Fig.26a The line denoted by reference numeral L5 shows an example of a path of light when light emitted from the light emitting section 13 of the light emitting substrate 10 passes through the optical sheet 20 in Modification 3.

[0550] In the third modification, the center C2 of the unit lens 21 in the first direction d1 is not offset from the center C1 of the light emitting portion 13 of the unit area 10a constituting the corresponding unit area second direction row 10c in the first direction d1. Fig.26aAs shown in FIG. 1 , the display device 1 of the modification example 3 further includes a light deflecting layer 80. The light deflecting layer 80 faces the second surface 20b of the optical sheet 20. Fig.26a In the example shown, the light deflecting layer 80 is located between the optical sheet 20 and the light angle adjustment layer 70 .

[0551] The light deflecting layer 80 deflects the light from the optical sheet 20 so that the traveling direction changes when observed from the second direction d2. Fig.26a In the example shown, the light deflecting layer 80 has a plurality of linear prisms 81 arranged in the first direction d1 and extending in the second direction d2. The linear prisms 81 have a first prism surface 82 inclined with respect to the front direction (normal direction d4) of the display device 1, and a second prism surface 83 parallel to the front direction of the display device 1. In this case, the light deflecting layer 80 refracts light from the optical sheet 20 in the first prism surface 82, thereby deflecting the light in a manner that changes the traveling direction when observed from the second direction d2.

[0552] In the display device 1 of the third modification, the light emitted from the light emitting substrate 10 and diffused in the direction perpendicular to the second direction d2 is first focused by the optical sheet 20 in the front direction (normal direction d4) of the display device 1. Then, the light focused in the front direction of the display device 1 is deflected by the light deflecting layer 80. Fig.26a According to the display device 1 of the third modification, as in the display device 1 of the second modification, the light emitted from the light emitting substrate 10 can be focused in a direction that is angled with respect to the front direction of the display device 1 . Figure 26b It shows that Fig.26a The graph shown is an example of the result of a test for simulating the brightness distribution in the direction perpendicular to the second direction d2 of the display device 1. In the simulation test, the refractive index of the optical sheet 20 was set to 1.50. Figure 26b The vertical axis marked with the symbol V represents the brightness by the ratio of the average brightness within the range of -5° to +5° with respect to the front direction (normal direction d4) of the light-emitting substrate 10 in the state where the optical sheet 20 is not overlapped. Figure 26b The horizontal axis of represents the angle θ (°) formed by the direction in which the brightness shown on the vertical axis is observed relative to the front direction (normal direction d4) of the display device 1. Figure 26b In the embodiment, the light emitted from the light emitting substrate 10 is focused in a direction d5 which forms an angle θ2 with respect to the front direction.

[0553] Furthermore, the display device 1 of Modification 2 has an advantage over the display device 1 of Modification 3 in that the light emitted from the light emitting substrate 10 can be focused in a direction at an angle with respect to the front direction of the display device 1 without providing a light deflecting layer 80 .

[0554] On the other hand, in the display device 1 of the modification 2, as shown in FIG. Fig.24a As shown, the center C2 deviates from the center C1. Therefore, in the display device 1 of the modification example 2, it can be considered that the light emitted from the light emitting unit 13 easily reaches the unit lens 21 other than the unit lens 21 located in the front direction of the light emitting unit 13. Referring to the results of the experiment simulating the brightness distribution in the display device 1 of the modification example 2, Figure 24b , the brightness becomes maximum at angle θ1, and reaches a maximum value at angle θ3. It can be considered that the reason why the brightness reaches a maximum value at angle θ3 is that the light emitted from the light-emitting portion 13 and passing through the lens surface 21a of the unit lens 21 adjacent to the unit lens 21 located in the front direction of the light-emitting portion 13 is focused in the direction of the angle θ3 relative to the front direction. In this regard, the display device 1 of modification example 3 does not need to offset the center C2 from the center C1. Therefore, compared with the display device 1 of modification example 2, the display device 1 of modification example 3 can suppress the light emitted from the light-emitting portion 13 from reaching the unit lens 21 other than the unit lens 21 located in the front direction of the light-emitting portion 13. Thus, as Figure 24b As shown, there is an advantage in that it is possible to suppress the light emitted from the light emitting portion 13 from being focused in directions other than the desired direction.

[0555] (Variant 4)

[0556] Variant 4 relates to an example in which conditions for the values ​​of the radius of curvature r and the distance d are determined based on a viewpoint different from the above-mentioned embodiments and variants so that each value of w / p can satisfy the following conditions: the brightness of the display device 1 is greater than 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m is greater than 50% of the maximum value M.

[0557] Hereinafter, the conditions of the values ​​of the radius of curvature r and the distance d in Modification 4 are described so that the following conditions can be satisfied for each value of w / p: the brightness of the display device 1 is 150% or more of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m is 50% or more of the maximum value M. In particular, a modification example of the conditions of the values ​​of the radius of curvature r and the distance d that satisfy the above-mentioned brightness conditions in the display device 1 in which the focusing direction of the optical sheet 20 is the front direction of the display device 1 is described.

[0558] When w / p is greater than or equal to 0.01 and less than 0.05, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (37); r / p is greater than or equal to 0.525 and less than 0.975 and satisfies the following formula (38); r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (39); r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (40); and r / p is greater than or equal to 0.525 and less than 0.975 and satisfies the following formula (41). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m is greater than or equal to 50% of the maximum value M.

[0559] [Number 24]

[0560] 0.21×r / p+0.01≤d / p≤1×r / p-0.02…Formula (37)

[0561] 1.4×r / p-0.45≤d / p≤2.23×r / p-0.4…Formula (38)

[0562] 1.09×r / p-0.18≤d / p≤1.53×r / p+0.3…Formula (39)

[0563] 2.43×r / p+0.05≤d / p≤3.57×r / p-0.21…Formula (40)

[0564] 4.57×r / p-0.89≤d / p≤4×r / p-0.3…Formula (41)

[0565] Fig. 27 It shows that Figures 1 to 5 The display device 1 shown in the figure sets the pitch p of the light emitting portion 13, the width w of the light emitting portion 13, the radius of curvature r and the distance d, and simulates the results of an experiment on the brightness distribution in the direction perpendicular to the second direction d2. Fig. 27 In the simulation test whose results are shown in FIG. 1 , the brightness distribution was simulated under four conditions, namely, the first to fourth conditions, with respect to the refractive index and w / p value of the optical sheet 20. Fig. 27In the simulation test whose results are shown in , the first to fourth conditions were determined as follows. Under the first condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 were determined so that the refractive index of the optical sheet 20 was 1.50 and the value of w / p was 0.01, and the brightness distribution was simulated. Under the second condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 were determined so that the refractive index of the optical sheet 20 was 1.60 and the value of w / p was 0.01, and the brightness distribution was simulated. Under the third condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated. Under the fourth condition, after determining the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 so that the refractive index of the optical sheet 20 is 1.60 and the value of w / p is 0.05, the values ​​of r / p and d / p are changed by changing the radius of curvature r and the distance d, and the brightness distribution is simulated. Fig. 27 "1" in the table shown means that under the corresponding r / p and d / p values, the brightness of the display device 1 is 150% or more of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped, and the above-mentioned minimum value m is 50% or more of the maximum value M. For example, "1" is marked in the column where r / p is 0.2 and d / p is 0.1 in the table. This means that under the 1st to 4th conditions, the curvature radius r and the distance d are determined so that r / p becomes 0.2 and d / p becomes 0.1, and the distribution of brightness is simulated. As a result, the above-mentioned brightness condition is satisfied under any of the 1st to 4th conditions. Fig. 27 "0" in the table shown means that, under the corresponding r / p and d / p values, at least one of the conditions 1 to 4 is not satisfied that the brightness of the display device 1 is 150% or more of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped, and the minimum value m is 50% or more of the maximum value M. For example, "0" is marked in the column where r / p is 0.2 and d / p is 0.2 in the table. This means that, under the conditions 1 to 4, the radius of curvature r and the distance d are determined so that r / p becomes 0.2 and d / p becomes 0.2, and the brightness distribution is simulated, and the above brightness condition is not satisfied under at least one of the conditions 1 to 4.

[0566] according to Fig. 27The test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.2 and less than 0.525 and satisfies formula (37); r / p is greater than 0.525 and less than 0.975 and satisfies formula (38); r / p is greater than 0.975 and less than 1.5 and satisfies formula (39); r / p is greater than 0.2 and less than 0.525 and satisfies formula (40); and r / p is greater than 0.525 and less than 0.975 and satisfies formula (41), then the above-mentioned brightness conditions are met.

[0567] In particular, the inventors of the present application have discovered the following tendency based on the results of simulation tests. When the values ​​of w / p, r / p, and d / p are fixed, the above-mentioned brightness condition is satisfied when the refractive index of the optical sheet 20 is A1 and the refractive index of the optical sheet 20 is A2. In this case, there is a tendency that the above-mentioned brightness condition is satisfied when the refractive index of the optical sheet 20 is A3 which is greater than A1 and less than A2. In addition, the inventors of the present application have discovered the following tendency based on the results of simulation tests. When the values ​​of the refractive index, r / p, and d / p of the optical sheet 20 are fixed, the above-mentioned brightness condition is satisfied when w / p is B1 and when w / p is B2. In this case, there is a tendency that the above-mentioned brightness condition is satisfied when w / p is B3 which is greater than B1 and less than B2. Based on the above tendency, from the "indicator" indicating whether the above-mentioned brightness condition is satisfied under the 1st to 4th conditions, Fig. 27 It can be understood that when the refractive index of the optical sheet 20 is greater than 1.50 and less than 1.60, and the value of w / p is greater than 0.01 and less than 0.05, if at least any one of the following conditions is met: r / p is greater than 0.2 and less than 0.525 and satisfies formula (37); r / p is greater than 0.525 and less than 0.975 and satisfies formula (38); r / p is greater than 0.975 and less than 1.5 and satisfies formula (39); r / p is greater than 0.2 and less than 0.525 and satisfies formula (40); and r / p is greater than 0.525 and less than 0.975 and satisfies formula (41), the above-mentioned brightness conditions are stably satisfied.

[0568] When w / p is greater than or equal to 0.05 and less than 0.1, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (42); r / p is greater than or equal to 0.525 and less than 0.975 and satisfies the following formula (43); r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (44); r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (45); and r / p is greater than or equal to 0.525 and less than 0.975 and satisfies the following formula (46). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m is greater than or equal to 50% of the maximum value M.

[0569] [Number 25]

[0570] 0.21×r / p+0.01≤d / p≤0.79×r / p+0.11…Formula (42)

[0571] 1.4×r / p-0.45≤d / p≤2.23×r / p-0.4…Formula (43)

[0572] 1.09×r / p-0.18≤d / p≤1.56×r / p+0.27…Formula (44)

[0573] 2.57×r / p-0.01≤d / p≤3.43×r / p-0.17…Formula (45)

[0574] 4.77×r / p-1.04≤d / p≤4.13×r / p-0.41…Formula (46)

[0575] Fig.28 It shows that Figures 1 to 5 The display device 1 shown in the figure sets the pitch p of the light emitting portion 13, the width w of the light emitting portion 13, the radius of curvature r and the distance d, and simulates the results of an experiment on the brightness distribution in the direction perpendicular to the second direction d2. Fig.28 In the simulation test whose results are shown in Fig. 27 The simulation test results shown in FIG. 4 simulated the brightness distribution under the first to fourth conditions in the same manner with respect to the refractive index and w / p value of the optical sheet 20. Fig.28In the simulation test whose results are shown in , the first to fourth conditions were determined as follows. Under the first condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 were determined so that the refractive index of the optical sheet 20 was 1.50 and the value of w / p was 0.05, and the brightness distribution was simulated. Under the second condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 were determined so that the refractive index of the optical sheet 20 was 1.60 and the value of w / p was 0.05, and the brightness distribution was simulated. Under the third condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated. Under the fourth condition, after determining the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 so that the refractive index of the optical sheet 20 is 1.60 and the value of w / p is 0.1, the values ​​of r / p and d / p are changed by changing the radius of curvature r and the distance d, and the brightness distribution is simulated. Fig.28 The meaning of "1" and "0" in the table shown is the same as Fig. 27 "1" and "0" in the table shown have the same meaning.

[0576] according to Fig.28 The test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.2 and less than 0.525 and satisfies formula (42); r / p is greater than 0.525 and less than 0.975 and satisfies formula (43); r / p is greater than 0.975 and less than 1.5 and satisfies formula (44); r / p is greater than 0.2 and less than 0.525 and satisfies formula (45); and r / p is greater than 0.525 and less than 0.975 and satisfies formula (46), then the above-mentioned brightness conditions are met.

[0577] In particular, from the luminance condition indicating whether the above-mentioned luminance condition is satisfied under the 1st to 4th conditions, Fig.28 It can be understood that when the refractive index of the optical sheet 20 is greater than 1.50 and less than 1.60, and the value of w / p is greater than 0.05 and less than 0.1, if at least any one of the following conditions is met: r / p is greater than 0.2 and less than 0.525 and satisfies formula (42); r / p is greater than 0.525 and less than 0.975 and satisfies formula (43); r / p is greater than 0.975 and less than 1.5 and satisfies formula (44); r / p is greater than 0.2 and less than 0.525 and satisfies formula (45); and r / p is greater than 0.525 and less than 0.975 and satisfies formula (46), the above-mentioned brightness conditions are stably satisfied.

[0578] When w / p is greater than or equal to 0.1 and less than 0.2, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.375 and satisfies the following formula (47); r / p is greater than or equal to 0.375 and less than 0.975 and satisfies the following formula (48); r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (49); and r / p is greater than or equal to 0.375 and less than 0.975 and satisfies the following formula (50). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m is greater than or equal to 50% of the maximum value M.

[0579] [Number 26]

[0580] 0.6×r / p-0.09≤d / p≤4×r / p-0.4…Formula (47)

[0581] 1.53×r / p-0.56≤d / p≤2.27×r / p-0.35…Formula (48)

[0582] 1.09×r / p-0.18≤d / p≤1.56×r / p+0.28…Formula (49)

[0583] 4.79×r / p-1.09≤d / p≤4.41×r / p-0.64…Formula (50)

[0584] Fig.29 It shows that Figures 1 to 5 The display device 1 shown in the figure sets the pitch p of the light emitting portion 13, the width w of the light emitting portion 13, the radius of curvature r and the distance d, and simulates the results of an experiment on the brightness distribution in the direction perpendicular to the second direction d2. Fig.29 In the simulation test whose results are shown in Fig. 27 The simulation test results shown in FIG. 4 simulated the brightness distribution under the first to fourth conditions in the same manner with respect to the refractive index and w / p value of the optical sheet 20. Fig.29In the simulation test whose results are shown in , the first to fourth conditions were determined as follows. Under the first condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 were determined so that the refractive index of the optical sheet 20 was 1.50 and the value of w / p was 0.1, and the brightness distribution was simulated. Under the second condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 were determined so that the refractive index of the optical sheet 20 was 1.60 and the value of w / p was 0.1, and the brightness distribution was simulated. Under the third condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated. Under the fourth condition, after determining the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 so that the refractive index of the optical sheet 20 is 1.60 and the value of w / p is 0.2, the values ​​of r / p and d / p are changed by changing the radius of curvature r and the distance d, and the brightness distribution is simulated. Fig.29 The meaning of "1" and "0" in the table shown is the same as Fig. 27 "1" and "0" in the table shown have the same meaning.

[0585] according to Fig.29 The test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.2 and less than 0.375 and satisfies formula (47); r / p is greater than 0.375 and less than 0.975 and satisfies formula (48); r / p is greater than 0.975 and less than 1.5 and satisfies formula (49); and r / p is greater than 0.375 and less than 0.975 and satisfies formula (50), then the above-mentioned brightness conditions are met.

[0586] In particular, from the luminance condition indicating whether the above-mentioned luminance condition is satisfied under the 1st to 4th conditions, Fig.29 It can be understood that when the refractive index of the optical sheet 20 is greater than 1.50 and less than 1.60, and the value of w / p is greater than 0.1 and less than 0.2, if at least any one of the following conditions is met: r / p is greater than 0.2 and less than 0.375 and satisfies formula (47); r / p is greater than 0.375 and less than 0.975 and satisfies formula (48); r / p is greater than 0.975 and less than 1.5 and satisfies formula (49); and r / p is greater than 0.375 and less than 0.975 and satisfies formula (50), the above-mentioned brightness conditions are stably satisfied.

[0587] When w / p is greater than or equal to 0.2 and less than 0.3, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.25 and less than 0.725 and satisfies the following formula (51); r / p is greater than or equal to 0.725 and less than 0.975 and satisfies the following formula (52); r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (53); and r / p is greater than or equal to 0.725 and less than 0.975 and satisfies the following formula (54). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m is greater than or equal to 50% of the maximum value M.

[0588] [Number 27]

[0589] 1.03×r / p-0.26≤d / p≤4.39×r / p-0.64…Formula (51)

[0590] 1.4×r / p-0.45≤d / p≤0.4×r / p+1.58…Formula (52)

[0591] 1.15×r / p-0.24≤d / p≤1.49×r / p+0.54…Formula (53)

[0592] 5.6×r / p-1.84≤d / p≤4×r / p-0.3…Formula (54)

[0593] Fig.30 It shows that Figures 1 to 5 The display device 1 shown in the figure sets the pitch p of the light emitting portion 13, the width w of the light emitting portion 13, the radius of curvature r and the distance d, and simulates the results of an experiment on the brightness distribution in the direction perpendicular to the second direction d2. Fig.30 In the simulation test whose results are shown in Fig. 27 The simulation test results shown in FIG. 4 simulated the brightness distribution under the first to fourth conditions in the same manner with respect to the refractive index and w / p value of the optical sheet 20. Fig.30In the simulation test whose results are shown in , the first to fourth conditions were determined as follows. Under the first condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 were determined so that the refractive index of the optical sheet 20 was 1.50 and the value of w / p was 0.2, and the brightness distribution was simulated. Under the second condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 were determined so that the refractive index of the optical sheet 20 was 1.60 and the value of w / p was 0.2, and the brightness distribution was simulated. Under the third condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated. Under the fourth condition, after determining the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 so that the refractive index of the optical sheet 20 is 1.60 and the value of w / p is 0.3, the values ​​of r / p and d / p are changed by changing the radius of curvature r and the distance d, and the brightness distribution is simulated. Fig.30 The meaning of "1" and "0" in the table shown is the same as Fig. 27 "1" and "0" in the table shown have the same meaning.

[0594] according to Fig.30 The test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.25 and less than 0.725 and satisfies formula (51); r / p is greater than 0.725 and less than 0.975 and satisfies formula (52); r / p is greater than 0.975 and less than 1.5 and satisfies formula (53); and r / p is greater than 0.725 and less than 0.975 and satisfies formula (54), then the above-mentioned brightness conditions are met.

[0595] In particular, from the luminance condition indicating whether the above-mentioned luminance condition is satisfied under the 1st to 4th conditions, Fig.30 It can be understood that when the refractive index of the optical sheet 20 is greater than 1.50 and less than 1.60, and the value of w / p is greater than 0.2 and less than 0.3, if at least any one of the following conditions is met: r / p is greater than 0.25 and less than 0.725 and satisfies equation (51); r / p is greater than 0.725 and less than 0.975 and satisfies equation (52); r / p is greater than 0.975 and less than 1.5 and satisfies equation (53); and r / p is greater than 0.725 and less than 0.975 and satisfies equation (54), the above-mentioned brightness conditions are stably satisfied.

[0596] When w / p is greater than or equal to 0.3 and less than 0.4, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.35 and less than 0.975 and satisfies the following formula (55); and r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (56). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m is greater than or equal to 50% of the maximum value M.

[0597] [Number 28]

[0598] 1.45×r / p-0.5≤d / p≤4.45×r / p-0.77…Formula (55)

[0599] 1.16×r / p-0.25≤d / p≤0.35×r / p+2.51…Formula (56)

[0600] Fig.31 It shows that Figures 1 to 5 The display device 1 shown in the figure sets the pitch p of the light emitting portion 13, the width w of the light emitting portion 13, the radius of curvature r and the distance d, and simulates the results of an experiment on the brightness distribution in the direction perpendicular to the second direction d2. Fig.31 In the simulation test whose results are shown in Fig. 27 The simulation test results shown in FIG. 4 simulated the brightness distribution under the first to fourth conditions in the same manner with respect to the refractive index and w / p value of the optical sheet 20. Fig.31 In the simulation test whose results are shown in , the first to fourth conditions were determined as follows. Under the first condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated, on the basis of determining the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 so that the refractive index of the optical sheet 20 was 1.50 and the value of w / p was 0.3. Under the second condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated, on the basis of determining the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 so that the refractive index of the optical sheet 20 was 1.60 and the value of w / p was 0.3. Under the third condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated, on the basis of determining the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 so that the refractive index of the optical sheet 20 was 1.50 and the value of w / p was 0.4. Under the fourth condition, after determining the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 so that the refractive index of the optical sheet 20 is 1.60 and the value of w / p is 0.4, the values ​​of r / p and d / p are changed by changing the radius of curvature r and the distance d, and the brightness distribution is simulated. Fig.31 The meaning of "1" and "0" in the table shown is the same as Fig. 27 "1" and "0" in the table shown have the same meaning.

[0601] according to Fig.31 The test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.35 and less than 0.975 and satisfies formula (55); and r / p is greater than 0.975 and less than 1.5 and satisfies formula (56), then the above-mentioned brightness conditions are met.

[0602] In particular, from the luminance condition indicating whether the above-mentioned luminance condition is satisfied under the 1st to 4th conditions, Fig.31 It can be understood that when the refractive index of the optical sheet 20 is greater than 1.50 and less than 1.60, and the value of w / p is greater than 0.3 and less than 0.4, if at least any one of the following conditions is met: r / p is greater than 0.35 and less than 0.975 and satisfies equation (55); and r / p is greater than 0.975 and less than 1.5 and satisfies equation (56), the above-mentioned brightness conditions are stably satisfied.

[0603] When w / p is greater than or equal to 0.4 and less than 0.5, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.4 and less than 0.675 and satisfies the following formula (57); and r / p is greater than or equal to 0.675 and less than 1.5 and satisfies the following formula (58). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m is greater than or equal to 50% of the maximum value M.

[0604] [Number 29]

[0605] 1.77×r / p-0.68≤d / p≤5.43×r / p-1.43…Formula (57)

[0606] 1.13×r / p-0.22≤d / p≤3.23×r / p+0.13…Formula (58)

[0607] Fig.32 It shows that Figures 1 to 5 The display device 1 shown in the figure sets the pitch p of the light emitting portion 13, the width w of the light emitting portion 13, the radius of curvature r and the distance d, and simulates the results of an experiment on the brightness distribution in the direction perpendicular to the second direction d2. Fig.32 In the simulation test whose results are shown in Fig. 27The simulation test results shown in FIG. 4 simulated the brightness distribution under the first to fourth conditions in the same manner with respect to the refractive index and w / p value of the optical sheet 20. Fig.32 In the simulation test whose results are shown in , the first to fourth conditions were determined as follows. Under the first condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated, on the basis of determining the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 so that the refractive index of the optical sheet 20 was 1.50 and the value of w / p was 0.4. Under the second condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated, on the basis of determining the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 so that the refractive index of the optical sheet 20 was 1.60 and the value of w / p was 0.4. Under the third condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated, on the basis of determining the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 so that the refractive index of the optical sheet 20 was 1.50 and the value of w / p was 0.5. Under the fourth condition, after determining the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 so that the refractive index of the optical sheet 20 is 1.60 and the value of w / p is 0.5, the values ​​of r / p and d / p are changed by changing the radius of curvature r and the distance d, and the brightness distribution is simulated. Fig.32 The meaning of "1" and "0" in the table shown is the same as Fig. 27 "1" and "0" in the table shown have the same meaning.

[0608] according to Fig.32 The test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.4 and less than 0.675 and satisfies formula (57); and r / p is greater than 0.675 and less than 1.5 and satisfies formula (58), then the above-mentioned brightness conditions are met.

[0609] In particular, from the luminance condition indicating whether the above-mentioned luminance condition is satisfied under the 1st to 4th conditions, Fig.32 It can be understood that when the refractive index of the optical sheet 20 is greater than 1.50 and less than 1.60, and the value of w / p is greater than 0.4 and less than 0.5, if at least any one of the following conditions is met: r / p is greater than 0.4 and less than 0.675 and satisfies equation (57); and r / p is greater than 0.675 and less than 1.5 and satisfies equation (58), the above-mentioned brightness conditions are stably satisfied.

[0610] When w / p is greater than or equal to 0.5 and less than 0.6, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.5 and less than 0.675 and satisfies the following formula (59); and r / p is greater than or equal to 0.675 and less than 1.5 and satisfies the following formula (60). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m is greater than or equal to 50% of the maximum value M.

[0611] [Number 30]

[0612] 2.6×r / p-1.17≤d / p≤6.6×r / p-2.27…Formula (59)

[0613] 1.27×r / p-0.33≤d / p≤3.3×r / p-0.06…Formula (60)

[0614] Fig.33 It shows that Figures 1 to 5 The display device 1 shown in the figure sets the pitch p of the light emitting portion 13, the width w of the light emitting portion 13, the radius of curvature r and the distance d, and simulates the results of an experiment on the brightness distribution in the direction perpendicular to the second direction d2. Fig.33 In the simulation test whose results are shown in Fig. 27 The simulation test results shown in FIG. 4 simulated the brightness distribution under the first to fourth conditions in the same manner with respect to the refractive index and w / p value of the optical sheet 20. Fig.33 In the simulation test whose results are shown in , the first to fourth conditions were determined as follows. Under the first condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated, on the basis of determining the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 so that the refractive index of the optical sheet 20 was 1.50 and the value of w / p was 0.5. Under the second condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated, on the basis of determining the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 so that the refractive index of the optical sheet 20 was 1.60 and the value of w / p was 0.5. Under the third condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated, on the basis of determining the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 so that the refractive index of the optical sheet 20 was 1.50 and the value of w / p was 0.6. Under the fourth condition, after determining the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 so that the refractive index of the optical sheet 20 is 1.60 and the value of w / p is 0.6, the values ​​of r / p and d / p are changed by changing the radius of curvature r and the distance d, and the brightness distribution is simulated. Fig.33 The meaning of "1" and "0" in the table shown is the same as Fig. 27 "1" and "0" in the table shown have the same meaning.

[0615] according to Fig.33 The test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.5 and less than 0.675 and satisfies equation (59); and r / p is greater than 0.675 and less than 1.5 and satisfies equation (60), then the above-mentioned brightness conditions are met.

[0616] In particular, from the luminance condition indicating whether the above-mentioned luminance condition is satisfied under the 1st to 4th conditions, Fig.33 It can be understood that when the refractive index of the optical sheet 20 is greater than 1.50 and less than 1.60, and the value of w / p is greater than 0.5 and less than 0.6, if at least any one of the following conditions is met: r / p is greater than 0.5 and less than 0.675 and satisfies equation (59); and r / p is greater than 0.675 and less than 1.5 and satisfies equation (60), the above-mentioned brightness conditions are stably satisfied.

[0617] Next, an example of a method for manufacturing the display device 1 according to Modification 4 is described. The method for manufacturing the display device 1 according to Modification 4 includes an adjustment step of adjusting the curvature radius r and the distance d according to the value of w / p, similarly to the display devices 1 according to the above-described embodiment and modifications.

[0618] In the adjustment process of variant example 4, when w / p is greater than 0.01 and less than 0.05, the curvature radius r and the distance d are adjusted so that at least any one of the following conditions is met: r / p is greater than 0.2 and less than 0.525 and satisfies the above-mentioned formula (37); r / p is greater than 0.525 and less than 0.975 and satisfies the above-mentioned formula (38); r / p is greater than 0.975 and less than 1.5 and satisfies the above-mentioned formula (39); r / p is greater than 0.2 and less than 0.525 and satisfies the above-mentioned formula (40); and r / p is greater than 0.525 and less than 0.975 and satisfies the above-mentioned formula (41).

[0619] In the adjustment process of variant example 4, when w / p is greater than 0.05 and less than 0.1, the curvature radius r and the distance d are adjusted so that at least any one of the following conditions is met: r / p is greater than 0.2 and less than 0.525 and satisfies the above-mentioned formula (42); r / p is greater than 0.525 and less than 0.975 and satisfies the above-mentioned formula (43); r / p is greater than 0.975 and less than 1.5 and satisfies the above-mentioned formula (44); r / p is greater than 0.2 and less than 0.525 and satisfies the above-mentioned formula (45); and r / p is greater than 0.525 and less than 0.975 and satisfies the above-mentioned formula (46).

[0620] In the adjustment process of variant example 4, when w / p is greater than 0.1 and less than 0.2, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is met: r / p is greater than 0.2 and less than 0.375 and satisfies the above-mentioned formula (47); r / p is greater than 0.375 and less than 0.975 and satisfies the above-mentioned formula (48); r / p is greater than 0.975 and less than 1.5 and satisfies the above-mentioned formula (49); and r / p is greater than 0.375 and less than 0.975 and satisfies the above-mentioned formula (50).

[0621] In the adjustment process of variant example 4, when w / p is greater than 0.2 and less than 0.3, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is met: r / p is greater than 0.25 and less than 0.725 and satisfies the above-mentioned formula (51); r / p is greater than 0.725 and less than 0.975 and satisfies the above-mentioned formula (52); r / p is greater than 0.975 and less than 1.5 and satisfies the above-mentioned formula (53); and r / p is greater than 0.725 and less than 0.975 and satisfies the above-mentioned formula (54).

[0622] In the adjustment process of variant example 4, when w / p is greater than 0.3 and less than 0.4, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is met: r / p is greater than 0.35 and less than 0.975 and satisfies the above-mentioned formula (55); and r / p is greater than 0.975 and less than 1.5 and satisfies the above-mentioned formula (56).

[0623] In the adjustment process of variant example 4, when w / p is greater than 0.4 and less than 0.5, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is met: r / p is greater than 0.4 and less than 0.675 and satisfies the above-mentioned formula (57); and r / p is greater than 0.675 and less than 1.5 and satisfies the above-mentioned formula (58).

[0624] In the adjustment process of variant example 4, when w / p is greater than 0.5 and less than 0.6, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is met: r / p is greater than 0.5 and less than 0.675 and satisfies the above-mentioned formula (59); and r / p is greater than 0.675 and less than 1.5 and satisfies the above-mentioned formula (60).

[0625] According to the manufacturing method of the display device 1 of the modification example 4 having the above adjustment process, it is possible to manufacture a display device 1 that satisfies the following conditions at the same time: the brightness is 150% or more of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m is 50% or more of the maximum value M. In particular, in the display device 1 in which the light-collecting direction of the optical sheet 20 is the front direction of the display device 1, it is considered that the brightness condition in the modification example 4 is satisfied. As described above, by adjusting the pitch p of the light-emitting portion 13, the width w of the light-emitting portion 13, the radius of curvature r, and the distance d as shown in the modification example 4, it is also possible to increase the brightness in the light-collecting direction while ensuring the brightness in the direction that is angled with respect to the light-collecting direction.

[0626] (Variant 5)

[0627] Variant 5 relates to an example in which conditions for the values ​​of the radius of curvature r and the distance d are determined based on a viewpoint different from the above-mentioned embodiments and variants so that each value of w / p can satisfy the following conditions: the brightness of the display device 1 is greater than 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m2 is greater than 50% of the maximum value M2.

[0628] Hereinafter, the conditions of the values ​​of the radius of curvature r and the distance d in Modification 5 are described so that the following conditions can be satisfied for each value of w / p: the brightness of the display device 1 is 150% or more of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m2 is 50% or more of the maximum value M2. In particular, a modification example of the conditions of the values ​​of the radius of curvature r and the distance d that satisfy the above-mentioned brightness conditions in the display device 1 in which the focusing direction of the optical sheet 20 is the front direction of the display device 1 is described.

[0629] When w / p is greater than or equal to 0.01 and less than 0.05, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (61); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (62). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m2 is greater than or equal to 50% of the maximum value M2.

[0630] [Number 31]

[0631] 0.21×r / p+0.02≤d / p≤1×r, p-0.08…Formula (61)

[0632] 1.17×r / p-0.28≤d / p≤1.26×r / p+0.13…Formula (62)

[0633] Fig.34 It shows that Figures 1 to 5 The display device 1 shown in the figure sets the pitch p of the light emitting portion 13, the width w of the light emitting portion 13, the radius of curvature r and the distance d, and simulates the results of an experiment on the brightness distribution in the direction perpendicular to the second direction d2. Fig.34 In the simulation test whose results are shown in FIG. 1 , the brightness distribution was simulated under four conditions, namely, the first to fourth conditions, with respect to the refractive index and w / p value of the optical sheet 20. Fig.34 In the simulation test whose results are shown in , the first to fourth conditions were determined as follows. Under the first condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 were determined so that the refractive index of the optical sheet 20 was 1.50 and the value of w / p was 0.01, and the brightness distribution was simulated. Under the second condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 were determined so that the refractive index of the optical sheet 20 was 1.60 and the value of w / p was 0.01, and the brightness distribution was simulated. Under the third condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated. Under the fourth condition, after determining the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 so that the refractive index of the optical sheet 20 is 1.60 and the value of w / p is 0.05, the values ​​of r / p and d / p are changed by changing the radius of curvature r and the distance d, and the brightness distribution is simulated. Fig.34"1" in the table shown means that under the corresponding r / p and d / p values, the brightness of the display device 1 is 150% or more of the brightness of the light-emitting substrate 10 in the state where the optical sheet 20 is not overlapped, and the above-mentioned minimum value m2 is 50% or more of the maximum value M2, which are satisfied under any of the 1st to 4th conditions. For example, "1" is marked in the column where r / p is 0.2 and d / p is 0.1 in the table. This means that under the 1st to 4th conditions, the curvature radius r and the distance d are determined so that r / p becomes 0.2 and d / p becomes 0.1, and the distribution of brightness is simulated, and the above-mentioned brightness condition is satisfied under any of the 1st to 4th conditions. Fig.34 "0" in the table shown means that under the corresponding r / p and d / p values, at least one of the conditions 1 to 4 is not satisfied that the brightness of the display device 1 is 150% or more of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped, and the minimum value m2 is 50% or more of the maximum value M2. For example, "0" is marked in the column where r / p is 0.2 and d / p is 0.2 in the table. This means that the result of determining the radius of curvature r and the distance d so that r / p becomes 0.2 and d / p becomes 0.2 under the conditions 1 to 4 and simulating the brightness distribution is that the brightness condition is not satisfied under at least one of the conditions 1 to 4.

[0634] according to Fig.34 The test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.2 and less than 0.525 and satisfies formula (61); and r / p is greater than 0.525 and less than 1.5 and satisfies formula (62), then the above-mentioned brightness conditions are met.

[0635] In particular, from the luminance condition indicating whether the above-mentioned luminance condition is satisfied under the 1st to 4th conditions, Fig.34 It can be understood that when the refractive index of the optical sheet 20 is greater than 1.50 and less than 1.60, and the value of w / p is greater than 0.01 and less than 0.05, if at least any one of the following conditions is met: r / p is greater than 0.2 and less than 0.525 and satisfies equation (61); and r / p is greater than 0.525 and less than 1.5 and satisfies equation (62), the above-mentioned brightness conditions are stably satisfied.

[0636] When w / p is greater than or equal to 0.05 and less than 0.1, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (63); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (64). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m2 is greater than or equal to 50% of the maximum value M2.

[0637] [Number 32]

[0638] 0.21×r / p+0.02≤d / p≤1×r / p-0.08…Formula (63)

[0639] 1.17×r / p-0.28≤d / p≤1.26×r / p+0.14…Formula (64)

[0640] Fig.35 It shows that Figures 1 to 5 The display device 1 shown in the figure sets the pitch p of the light emitting portion 13, the width w of the light emitting portion 13, the radius of curvature r and the distance d, and simulates the results of an experiment on the brightness distribution in the direction perpendicular to the second direction d2. Fig.35 In the simulation test whose results are shown in Fig.34 The simulation test results shown in FIG. 4 simulated the brightness distribution under the first to fourth conditions in the same manner with respect to the refractive index and w / p value of the optical sheet 20. Fig.35 In the simulation test whose results are shown in , the first to fourth conditions were determined as follows. Under the first condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 were determined so that the refractive index of the optical sheet 20 was 1.50 and the value of w / p was 0.05, and the brightness distribution was simulated. Under the second condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 were determined so that the refractive index of the optical sheet 20 was 1.60 and the value of w / p was 0.05, and the brightness distribution was simulated. Under the third condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated. Under the fourth condition, after determining the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 so that the refractive index of the optical sheet 20 is 1.60 and the value of w / p is 0.1, the values ​​of r / p and d / p are changed by changing the radius of curvature r and the distance d, and the brightness distribution is simulated. Fig.35 The meaning of "1" and "0" in the table shown is the same as Fig.34 "1" and "0" in the table shown have the same meaning.

[0641] according to Fig.35 The test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.2 and less than 0.525 and satisfies formula (63); and r / p is greater than 0.525 and less than 1.5 and satisfies formula (64), then the above-mentioned brightness conditions are met.

[0642] In particular, from the luminance condition indicating whether the above-mentioned luminance condition is satisfied under the 1st to 4th conditions, Fig.35 It can be understood that when the refractive index of the optical sheet 20 is greater than 1.50 and less than 1.60, and the value of w / p is greater than 0.05 and less than 0.1, if at least any one of the following conditions is met: r / p is greater than 0.2 and less than 0.525 and satisfies equation (63); and r / p is greater than 0.525 and less than 1.5 and satisfies equation (64), the above-mentioned brightness conditions are stably satisfied.

[0643] When w / p is greater than or equal to 0.1 and less than 0.2, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (65); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (66). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m2 is greater than or equal to 50% of the maximum value M2.

[0644] [Number 33]

[0645] 0.21×r / p+0.01≤d / p≤0.71×r / p+0.05…Formula (65)

[0646] 1.17×r / p-0.28≤d / p≤1.26×r / p+0.14…Formula (66)

[0647] Fig.36 It shows that Figures 1 to 5 The display device 1 shown in the figure sets the pitch p of the light emitting portion 13, the width w of the light emitting portion 13, the radius of curvature r and the distance d, and simulates the results of an experiment on the brightness distribution in the direction perpendicular to the second direction d2. Fig.36 In the simulation test whose results are shown in Fig.34The simulation test results shown in FIG. 4 simulated the brightness distribution under the first to fourth conditions in the same manner with respect to the refractive index and w / p value of the optical sheet 20. Fig.36 In the simulation test whose results are shown in , the first to fourth conditions were determined as follows. Under the first condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 were determined so that the refractive index of the optical sheet 20 was 1.50 and the value of w / p was 0.1, and the brightness distribution was simulated. Under the second condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 were determined so that the refractive index of the optical sheet 20 was 1.60 and the value of w / p was 0.1, and the brightness distribution was simulated. Under the third condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated. Under the fourth condition, after determining the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 so that the refractive index of the optical sheet 20 is 1.60 and the value of w / p is 0.2, the values ​​of r / p and d / p are changed by changing the radius of curvature r and the distance d, and the brightness distribution is simulated. Fig.36 The meaning of "1" and "0" in the table shown is the same as Fig.34 "1" and "0" in the table shown have the same meaning.

[0648] according to Fig.36 The test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.2 and less than 0.525 and satisfies formula (65); and r / p is greater than 0.525 and less than 1.5 and satisfies formula (66), then the above-mentioned brightness conditions are met.

[0649] In particular, from the luminance condition indicating whether the above-mentioned luminance condition is satisfied under the 1st to 4th conditions, Fig.36 It can be understood that when the refractive index of the optical sheet 20 is greater than 1.50 and less than 1.60, and the value of w / p is greater than 0.1 and less than 0.2, if at least any one of the following conditions is met: r / p is greater than 0.2 and less than 0.525 and satisfies equation (65); and r / p is greater than 0.525 and less than 1.5 and satisfies equation (66), the above-mentioned brightness conditions are stably satisfied.

[0650] When w / p is greater than or equal to 0.2 and less than 0.3, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.25 and less than 0.525 and satisfies the following formula (67); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (68). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m2 is greater than or equal to 50% of the maximum value M2.

[0651] [Number 34]

[0652] 0.29×r / p-0.05≤d / p≤-0.23×r / p+0.62…Formula (67)

[0653] 1.2×r / p-0.3≤d / p≤1.2×r / p+0.21…Formula (68)

[0654] Fig.37 It shows that Figures 1 to 5 The display device 1 shown in the figure sets the pitch p of the light emitting portion 13, the width w of the light emitting portion 13, the radius of curvature r and the distance d, and simulates the results of an experiment on the brightness distribution in the direction perpendicular to the second direction d2. Fig.37 In the simulation test whose results are shown in Fig.34 The simulation test results shown in FIG. 4 simulated the brightness distribution under the first to fourth conditions in the same manner with respect to the refractive index and w / p value of the optical sheet 20. Fig.37 In the simulation test whose results are shown in , the first to fourth conditions were determined as follows. Under the first condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 were determined so that the refractive index of the optical sheet 20 was 1.50 and the value of w / p was 0.2, and the brightness distribution was simulated. Under the second condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 were determined so that the refractive index of the optical sheet 20 was 1.60 and the value of w / p was 0.2, and the brightness distribution was simulated. Under the third condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated. Under the fourth condition, after determining the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 so that the refractive index of the optical sheet 20 is 1.60 and the value of w / p is 0.3, the values ​​of r / p and d / p are changed by changing the radius of curvature r and the distance d, and the brightness distribution is simulated. Fig.37 The meaning of "1" and "0" in the table shown is the same as Fig.34 "1" and "0" in the table shown have the same meaning.

[0655] according to Fig.37 The test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.25 and less than 0.525 and satisfies formula (67); and r / p is greater than 0.525 and less than 1.5 and satisfies formula (68), then the above-mentioned brightness conditions are met.

[0656] In particular, from the luminance condition indicating whether the above-mentioned luminance condition is satisfied under the 1st to 4th conditions, Fig.37 It can be understood that when the refractive index of the optical sheet 20 is greater than 1.50 and less than 1.60, and the value of w / p is greater than 0.2 and less than 0.3, if at least any one of the following conditions is met: r / p is greater than 0.25 and less than 0.525 and satisfies equation (67); and r / p is greater than 0.525 and less than 1.5 and satisfies equation (68), the above-mentioned brightness conditions are stably satisfied.

[0657] When w / p is greater than or equal to 0.3 and less than or equal to 0.4, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.35 and less than or equal to 0.675 and satisfies the following formula (69); and r / p is greater than or equal to 0.675 and less than or equal to 1.5 and satisfies the following formula (70). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m2 is greater than or equal to 50% of the maximum value M2.

[0658] [Number 35]

[0659] 1.43×r / p-0.49≤d / p≤1.07×r / p+0.45…Formula (69)

[0660] 1.19×r / p-0.28≤d / p≤1×r / p+0.5…Formula (70)

[0661] Fig.38 It shows that Figures 1 to 5 The display device 1 shown in the figure sets the pitch p of the light emitting portion 13, the width w of the light emitting portion 13, the radius of curvature r and the distance d, and simulates the results of an experiment on the brightness distribution in the direction perpendicular to the second direction d2. Fig.38 In the simulation test whose results are shown in Fig.34The simulation test results shown in FIG. 4 simulated the brightness distribution under the first to fourth conditions in the same manner with respect to the refractive index and w / p value of the optical sheet 20. Fig.38 In the simulation test whose results are shown in , the first to fourth conditions were determined as follows. Under the first condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated, on the basis of determining the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 so that the refractive index of the optical sheet 20 was 1.50 and the value of w / p was 0.3. Under the second condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated, on the basis of determining the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 so that the refractive index of the optical sheet 20 was 1.60 and the value of w / p was 0.3. Under the third condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated, on the basis of determining the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 so that the refractive index of the optical sheet 20 was 1.50 and the value of w / p was 0.4. Under the fourth condition, after determining the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 so that the refractive index of the optical sheet 20 is 1.60 and the value of w / p is 0.4, the values ​​of r / p and d / p are changed by changing the radius of curvature r and the distance d, and the brightness distribution is simulated. Fig.38 The meaning of "1" and "0" in the table shown is the same as Fig.34 "1" and "0" in the table shown have the same meaning.

[0662] according to Fig.38 The test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.35 and less than 0.675 and satisfies formula (69); and r / p is greater than 0.675 and less than 1.5 and satisfies formula (70), then the above-mentioned brightness conditions are met.

[0663] In particular, from the luminance condition indicating whether the above-mentioned luminance condition is satisfied under the 1st to 4th conditions, Fig.38 It can be understood that when the refractive index of the optical sheet 20 is greater than 1.50 and less than 1.60, and the value of w / p is greater than 0.3 and less than 0.4, if at least any one of the following conditions is met: r / p is greater than 0.35 and less than 0.675 and satisfies equation (69); and r / p is greater than 0.675 and less than 1.5 and satisfies equation (70), the above-mentioned brightness conditions are stably satisfied.

[0664] When w / p is greater than or equal to 0.4 and less than 0.5, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.4 and less than 0.675 and satisfies the following formula (71); and r / p is greater than or equal to 0.675 and less than 1.5 and satisfies the following formula (72). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m2 is greater than or equal to 50% of the maximum value M2.

[0665] [Number 36]

[0666] 1.77×r / p-0.68≤d / p≤2.86×r / p-0.23…Formula (71)

[0667] 1.15×r / p-0.23≤d / p≤0.64×r / p+1.13…Formula (72)

[0668] Fig.39 It shows that Figures 1 to 5 The display device 1 shown in the figure sets the pitch p of the light emitting portion 13, the width w of the light emitting portion 13, the radius of curvature r and the distance d, and simulates the results of an experiment on the brightness distribution in the direction perpendicular to the second direction d2. Fig.39 In the simulation test whose results are shown in Fig.34 The simulation test results shown in FIG. 4 simulated the brightness distribution under the first to fourth conditions in the same manner with respect to the refractive index and w / p value of the optical sheet 20. Fig.39 In the simulation test whose results are shown in , the first to fourth conditions were determined as follows. Under the first condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated, on the basis of determining the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 so that the refractive index of the optical sheet 20 was 1.50 and the value of w / p was 0.4. Under the second condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated, on the basis of determining the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 so that the refractive index of the optical sheet 20 was 1.60 and the value of w / p was 0.4. Under the third condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated, on the basis of determining the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 so that the refractive index of the optical sheet 20 was 1.50 and the value of w / p was 0.5. Under the fourth condition, after determining the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 so that the refractive index of the optical sheet 20 is 1.60 and the value of w / p is 0.5, the values ​​of r / p and d / p are changed by changing the radius of curvature r and the distance d, and the brightness distribution is simulated. Fig.39 The meaning of "1" and "0" in the table shown is the same as Fig.34 "1" and "0" in the table shown have the same meaning.

[0669] according to Fig.39 The test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.4 and less than 0.675 and satisfies formula (71); and r / p is greater than 0.675 and less than 1.5 and satisfies formula (72), then the above-mentioned brightness conditions are met.

[0670] In particular, from the luminance condition indicating whether the above-mentioned luminance condition is satisfied under the 1st to 4th conditions, Fig.39 It can be understood that when the refractive index of the optical sheet 20 is greater than 1.50 and less than 1.60, and the value of w / p is greater than 0.4 and less than 0.5, if at least any one of the following conditions is met: r / p is greater than 0.4 and less than 0.675 and satisfies equation (71); and r / p is greater than 0.675 and less than 1.5 and satisfies equation (72), the above-mentioned brightness conditions are stably satisfied.

[0671] When w / p is greater than or equal to 0.5 and less than 0.6, it is preferred that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.5 and less than 0.675 and satisfies the following formula (73); and r / p is greater than or equal to 0.675 and less than 1.5 and satisfies the following formula (74). Thus, it is possible to simultaneously satisfy: the brightness of the display device 1 is greater than or equal to 150% of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m2 is greater than or equal to 50% of the maximum value M2.

[0672] [Number 37]

[0673] 2.6×r / p-1.17≤d / p≤6.6×r / p-2.27…Formula (73)

[0674] 1.27×r / p-0.33≤d / p≤0.35×r / p+1.78…Formula (74)

[0675] Fig.40 It shows that Figures 1 to 5 The display device 1 shown in the figure sets the pitch p of the light emitting portion 13, the width w of the light emitting portion 13, the radius of curvature r and the distance d, and simulates the results of an experiment on the brightness distribution in the direction perpendicular to the second direction d2. Fig.40 In the simulation test whose results are shown in Fig.34The simulation test results shown in FIG. 4 simulated the brightness distribution under the first to fourth conditions in the same manner with respect to the refractive index and w / p value of the optical sheet 20. Fig.40 In the simulation test whose results are shown in , the first to fourth conditions were determined as follows. Under the first condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated, on the basis of determining the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 so that the refractive index of the optical sheet 20 was 1.50 and the value of w / p was 0.5. Under the second condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated, on the basis of determining the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 so that the refractive index of the optical sheet 20 was 1.60 and the value of w / p was 0.5. Under the third condition, the values ​​of r / p and d / p were changed by changing the radius of curvature r and the distance d, while the brightness distribution was simulated, on the basis of determining the pitch p of the light-emitting portions 13 and the width w of the light-emitting portions 13 so that the refractive index of the optical sheet 20 was 1.50 and the value of w / p was 0.6. Under the fourth condition, after determining the pitch p of the light-emitting portion 13 and the width w of the light-emitting portion 13 so that the refractive index of the optical sheet 20 is 1.60 and the value of w / p is 0.6, the values ​​of r / p and d / p are changed by changing the radius of curvature r and the distance d, and the brightness distribution is simulated. Fig.40 The meaning of "1" and "0" in the table shown is the same as Fig.34 "1" and "0" in the table shown have the same meaning.

[0676] according to Fig.40 The test results shown can also be understood that if at least any one of the following conditions is met: r / p is greater than 0.5 and less than 0.675 and satisfies formula (73); and r / p is greater than 0.675 and less than 1.5 and satisfies formula (74), then the above-mentioned brightness conditions are met.

[0677] In particular, from the luminance condition indicating whether the above-mentioned luminance condition is satisfied under the 1st to 4th conditions, Fig.40 It can be understood that when the refractive index of the optical sheet 20 is greater than 1.50 and less than 1.60, and the value of w / p is greater than 0.5 and less than 0.6, if at least any one of the following conditions is met: r / p is greater than 0.5 and less than 0.675 and satisfies equation (73); and r / p is greater than 0.675 and less than 1.5 and satisfies equation (74), the above-mentioned brightness conditions are stably satisfied.

[0678] Next, an example of a method for manufacturing the display device 1 of Modification 5 is described. The method for manufacturing the display device 1 of Modification 5 includes an adjustment step of adjusting the curvature radius r and the distance d according to the value of w / p, similarly to the display devices 1 of the above-described embodiment and each modification.

[0679] In the adjustment process of variant example 5, when w / p is greater than 0.01 and less than 0.05, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is met: r / p is greater than 0.2 and less than 0.525 and satisfies the above-mentioned formula (61); and r / p is greater than 0.525 and less than 1.5 and satisfies the above-mentioned formula (62).

[0680] In the adjustment process of variant example 5, when w / p is greater than 0.05 and less than 0.1, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is met: r / p is greater than 0.2 and less than 0.525 and satisfies the above-mentioned formula (63); and r / p is greater than 0.525 and less than 1.5 and satisfies the above-mentioned formula (64).

[0681] In the adjustment process of variant example 5, when w / p is greater than 0.1 and less than 0.2, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is met: r / p is greater than 0.2 and less than 0.525 and satisfies the above-mentioned formula (65); and r / p is greater than 0.525 and less than 1.5 and satisfies the above-mentioned formula (66).

[0682] In the adjustment process of variant example 5, when w / p is greater than 0.2 and less than 0.3, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is met: r / p is greater than 0.25 and less than 0.525 and satisfies the above-mentioned formula (67); and r / p is greater than 0.525 and less than 1.5 and satisfies the above-mentioned formula (68).

[0683] In the adjustment process of variant example 5, when w / p is greater than 0.3 and less than 0.4, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is met: r / p is greater than 0.35 and less than 0.675 and satisfies the above-mentioned formula (69); and r / p is greater than 0.675 and less than 1.5 and satisfies the above-mentioned formula (70).

[0684] In the adjustment process of variant example 5, when w / p is greater than 0.4 and less than 0.5, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is met: r / p is greater than 0.4 and less than 0.675 and satisfies the above-mentioned formula (71); and r / p is greater than 0.675 and less than 1.5 and satisfies the above-mentioned formula (72).

[0685] In the adjustment process of variant example 5, when w / p is greater than 0.5 and less than 0.6, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is met: r / p is greater than 0.5 and less than 0.675 and satisfies the above-mentioned formula (73); and r / p is greater than 0.675 and less than 1.5 and satisfies the above-mentioned formula (74).

[0686] According to the manufacturing method of the display device 1 of the modification example 5 having the above adjustment process, it is possible to manufacture a display device 1 that satisfies the following conditions at the same time: the brightness is 150% or more of the brightness of the light-emitting substrate 10 in a state where the optical sheet 20 is not overlapped; and the above-mentioned minimum value m2 is 50% or more of the maximum value M2. In particular, in the display device 1 in which the light-collecting direction of the optical sheet 20 is the front direction of the display device 1, it is considered that the brightness condition in the modification example 5 is satisfied. As described above, by adjusting the pitch p of the light-emitting portion 13, the width w of the light-emitting portion 13, the radius of curvature r, and the distance d as shown in the modification example 5, it is also possible to increase the brightness in the light-collecting direction while ensuring the brightness in the direction that is angled with respect to the light-collecting direction.

[0687] It is also possible to appropriately combine a plurality of components disclosed in the above-mentioned embodiment and each modification example as needed. Alternatively, it is also possible to delete some components from all the components shown in the above-mentioned embodiment and each modification example.

[0688] Description of symbols

[0689] 1: Display device;

[0690] 10: Light-emitting substrate;

[0691] 10a: unit area;

[0692] 10c: second direction column of unit area;

[0693] 11: semiconductor layer;

[0694] 13: light emitting part;

[0695] 13R: 1st light emitting part;

[0696] 13G: second light emitting part;

[0697] 13B: the third light emitting part;

[0698] 20: Optical sheet;

[0699] 20a: Side 1;

[0700] 20b: Side 2;

[0701] 21: unit lens;

[0702] 21a: lens surface;

[0703] 70: Light angle adjustment layer;

[0704] 80: Light deflection layer.

Claims

1. A display device, wherein: The display device comprises: A light-emitting substrate including a semiconductor layer divided into a plurality of unit regions and light-emitting portions arranged in the plurality of unit regions; and an optical sheet disposed opposite to the light-emitting substrate, The optical sheet has a plurality of unit lenses, the plurality of unit lenses are arranged in a first direction and extend in a second direction that is not parallel to the first direction. The plurality of unit regions are arranged in the first direction and the second direction, Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is less than 0.025, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (1); r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (2); r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (3); r / p is greater than or equal to 0.525 and less than 0.725 and satisfies the following formula (4); and r / p is greater than or equal to 0.725 and less than 1.5 and satisfies the following formula (5), or Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.025 and less than 0.075, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (6); r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (7); r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (8); r / p is greater than or equal to 0.525 and less than 0.725 and satisfies the following formula (9); and r / p is greater than or equal to 0.725 and less than 1.5 and satisfies the following formula (10), or Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.075 and less than 0.15, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.375 and satisfies the following formula (11); r / p is greater than or equal to 0.375 and less than 1.5 and satisfies the following formula (12); r / p is greater than or equal to 0.2 and less than 0.725 and satisfies the following formula (13); and r / p is greater than or equal to 0.725 and less than 1.5 and satisfies the following formula (14), or Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.15 and less than 0.25, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.725 and satisfies the following formula (15); r / p is greater than or equal to 0.725 and less than 1.5 and satisfies the following formula (16); and r / p is greater than or equal to 0.2 and less than 1.5 and satisfies the following formula (17), or Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.25 and less than 0.35, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.25 and less than 0.975 and satisfies the following formula (18); and r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (19), or Let the pitch of the light-emitting portion in the first direction be p, let the width of the light-emitting portion in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.35 and less than 0.45, and r / p is greater than or equal to 0.3 and less than 1.5 and satisfies the following formula (20), or Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.45 and less than 0.55, and r / p is greater than or equal to 0.4 and less than 1.5 and satisfies the following formula (21), or Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.55 and less than 0.65, and r / p is greater than or equal to 0.45 and less than 1.5 and satisfies the following formula (22), [Number 1] 1.18×r / p-0.29≤d / p≤1.36×r / p-0.05…Formula (1) 1.18×r / p-0.29≤d / p≤2.08×r / p-0.15…Formula (2) 2.43×r / p+0.05≤d / p≤4.64×r / p-0.3…Formula (3) 4.5×r / p-0.85≤d / p≤4.64×r / p-0.3…Formula (4) 4.5×r / p-0.85≤d / p≤1.2×r / p+2.46…Formula (5) 1.18×r / p-0.29≤d / p≤1.36×r / p…Formula (6) 1.18×r / p-0.29≤d / p≤2.05×r / p-0.03…Formula (7) 2.57×r / p-0.01≤d / p≤4.65×r / p-0.3…Formula (8) 4.67×r / p-0.98≤d / p≤4.65×r / p-0.3…Formula (9) 4.67×r / p-0.98≤d / p≤1.2×r / p+2.46…Formula (10) 1.18×r / p-0.29≤d / p≤4×r / p-0.1…Formula (11) 1.18×r / p-0.29≤d / p≤2.17×r… / p-0.19…Formula (12) 4.79×r / p-1.09≤d / p≤5.07×r / p-0.58…Formula (13) 4.79×r / p-1.09≤d / p≤1.8×r / p+1.94…Formula (14) 1.18×r / p-0.29≤d / p≤4.84×r / p-0.45…Formula (15) 1.18×r / p-0.29≤d / p≤1.69×r / p+0.6…Formula (16) 5.6×r / p-1.84≤d / p≤1.8×r / p+1.94…Formula (17) 1.22×r / p-0.33≤d / p≤4.55×r / p-0.42…Formula (18) 1.22×r / p-0.33≤d / p≤1.04×r / p+1.78…Formula (19) 1.26×r / p-0.37≤d / p≤5.56×r / p-1.01…Formula (20) 1.28×r / p-0.339≤d / p≤5.83×r / p-1.29…Formula (21) 1.38×r / p-0.45≤d / p≤5.8×r / p-1.48…Formula (22).

2. A display device, wherein: The display device comprises: A light-emitting substrate including a semiconductor layer divided into a plurality of unit regions and light-emitting portions arranged in the plurality of unit regions; and an optical sheet disposed opposite to the light-emitting substrate, The optical sheet has a plurality of unit lenses, the plurality of unit lenses are arranged in a first direction and extend in a second direction that is not parallel to the first direction. The plurality of unit regions are arranged in the first direction and the second direction, Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is less than 0.025, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (23); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (24), or Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.025 and less than 0.15, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (25); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (26), or Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.15 and less than 0.25, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (27); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (28), or Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.25 and less than 0.35, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.25 and less than 0.425 and satisfies the following formula (29); and r / p is greater than or equal to 0.425 and less than 1.5 and satisfies the following formula (30), or Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.35 and less than 0.45, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.3 and less than 0.525 and satisfies the following formula (31); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (32), or Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.45 and less than 0.55, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.4 and less than 0.625 and satisfies the following formula (33); and r / p is greater than or equal to 0.625 and less than 1.5 and satisfies the following formula (34), or Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.55 and less than 0.65, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.45 and less than 0.625 and satisfies the following formula (35); and r / p is greater than or equal to 0.625 and less than 1.5 and satisfies the following formula (36), [Number 2] 1.18×r / p-0.29≤d / p≤1×r / p-0.02…Formula (23) 1.18×r / p-0.29≤d / p≤1.33×r / p+0.15…Formula (24) 1.18×r / p-0.29≤d / p≤1.14×r / p-0.04…Formula (25) 1.18×r / p-0.29≤d / p≤1.3×r / p+0.18…Formula (26) 1.18×r / p-0.29≤d / p≤-0.29×r / p+0.73…Formula (27) 1.18×r / p-0.29≤d / p≤1.29×r / p+0.28…Formula (28) 1.22×r / p-0.33≤d / p≤4.6×r / p-0.52…Formula (29) 1.22×r / p-0.33≤d / p≤1.23×r / p+0.38…Formula (30)) 1.26×r / p-0.37≤d / p≤5.4×r / / p-0.96…Formula (31) 1.26×r / p-0.37≤d / p≤0.77×r / p+1.08…Formula (32) 1.28×r / p-0.39≤d / p≤5.83×r / p-1.29…Formula (33) 1.28×r / p-0.39≤d / p≤0.4×r / p+1.77…Formula (34) 1.38×r / p-0.45≤d / p≤7.6×r / p-2.44…Formula (35) 1.38×r / p-0.45≤d / p≤0.26×r / p+2.29…Formula (36).

3. A display device, wherein: The display device comprises: A light-emitting substrate including a semiconductor layer divided into a plurality of unit regions and light-emitting portions arranged in the plurality of unit regions; and an optical sheet disposed opposite to the light-emitting substrate, The optical sheet has a plurality of unit lenses, the plurality of unit lenses are arranged in a first direction and extend in a second direction that is not parallel to the first direction. The plurality of unit regions are arranged in the first direction and the second direction, Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.01 and less than 0.05, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (37); r / p is greater than or equal to 0.525 and less than 0.975 and satisfies the following formula (38); r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (39); r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (40); and r / p is greater than or equal to 0.525 and less than 0.975 and satisfies the following formula (41), or Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.05 and less than 0.1, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (42); r / p is greater than or equal to 0.525 and less than 0.975 and satisfies the following formula (43); r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (44); r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (45); and r / p is greater than or equal to 0.525 and less than 0.975 and satisfies the following formula (46), or Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.1 and less than 0.2, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.375 and satisfies the following formula (47); r / p is greater than or equal to 0.375 and less than 0.975 and satisfies the following formula (48); r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (49); and r / p is greater than or equal to 0.375 and less than 0.975 and satisfies the following formula (50), or Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.2 and less than 0.3, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.25 and less than 0.725 and satisfies the following formula (51); r / p is greater than or equal to 0.725 and less than 0.975 and satisfies the following formula (52); r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (53); and r / p is greater than or equal to 0.725 and less than 0.975 and satisfies the following formula (54), or Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.3 and less than 0.4, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.35 and less than 0.975 and satisfies the following formula (55); and r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (56), or Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.4 and less than 0.5, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.4 and less than 0.675 and satisfies the following formula (57); and r / p is greater than or equal to 0.675 and less than 1.5 and satisfies the following formula (58), or Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.5 and less than 0.6, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.5 and less than 0.675 and satisfies the following formula (59); and r / p is greater than or equal to 0.675 and less than 1.5 and satisfies the following formula (60), [Number 3] 0.21×r / p+0.01≤d / p≤1×r / p-0.02…Formula (37) 1.4×r / p-0.45≤d / p≤2.23×r / p-0.4…Formula (38) 1.09×r / p-0.18≤d / p≤1.53×r / p+0.3…Formula (39) 2.43×r / p+0.05≤d / p≤3.57×r / p-0.21…Formula (40) 4.57×r / p-0.89≤d / p≤4×r / p-0.3…Formula (41) 0.21×r / p+0.01≤d / p≤0.79×r / p+0.11…Formula (42) 1.4×r / p-0.45≤d / p≤2.23×r / p-0.4…Formula (43) 1.09×r / p-0.18≤d / p≤1.56×r / p+0.27…Formula (44) 2.57×r / p-0.01≤d / p≤3.43×r / p-0.17…Formula (45) 4.77×r / p-1.04≤d / p≤4.13×r / p-0.41…Formula (46) 0.6×rp-0.09≤d / p≤4×r / p-0.4…Formula (47) 1.53×r / p-0.56≤d / p≤2.27×r / p-0.35…Formula (48) 1.09×r / p-0.18≤d / p≤1.56×r / p+0.28…Formula (49) 4.79×r / p-1.09≤d / p≤4.41×r / p-0.64…Formula (50) 1.03×r / p-0.26≤d / p≤4.39×r / p-0.64…Formula (51) 1.4×r / p-0.45≤d / p≤0.4×r / p+1.58…Formula (52) 1.15×r / p-0.24≤d / p≤1.49×r / p+0.54…Formula (53) 5.6×r / p-1.84≤d / p≤4×r / p-0.3…Formula (54) 1.45×r / p-0.5≤d / p≤4.45×r / p-0.77…Formula (55) 1.16×r / p-0.25≤d / p≤0.35×r / p+2.51…Formula (56) 1.77×r / p-0.68≤d / / p≤5.43×r / p-1.43…Formula (57) 1.13×r / p-0.22≤d / p≤3.23×r / p+0.13…Formula (58) 2.6×r / / p-1.17≤d / p≤6.6×r / p-2.27…Formula (59) 1.27×r / p-0.33≤d / p≤3.3×r / p-0.06…Formula (60).

4. A display device, wherein: The display device comprises: A light-emitting substrate including a semiconductor layer divided into a plurality of unit regions and light-emitting portions arranged in the plurality of unit regions; and an optical sheet disposed opposite to the light-emitting substrate, The optical sheet has a plurality of unit lenses, the plurality of unit lenses are arranged in a first direction and extend in a second direction that is not parallel to the first direction. The plurality of unit regions are arranged in the first direction and the second direction, Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.01 and less than 0.05, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (61); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (62), or Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.05 and less than 0.1, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (63); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (64), or Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.1 and less than 0.2, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (65); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (66), or Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.2 and less than 0.3, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.25 and less than 0.525 and satisfies the following formula (67); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (68), or Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.3 and less than 0.4, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.35 and less than 0.675 and satisfies the following formula (69); and r / p is greater than or equal to 0.675 and less than 1.5 and satisfies the following formula (70), or Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.4 and less than 0.5, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.4 and less than 0.675 and satisfies the following formula (71); and r / p is greater than or equal to 0.675 and less than 1.5 and satisfies the following formula (72), or Let the pitch of the light-emitting portions in the first direction be p, let the width of the light-emitting portions in the first direction be w, let the radius of curvature of the lens surface of the unit lens be r, let the distance between the light-emitting portion and the unit lens be d, then w / p is greater than or equal to 0.5 and less than 0.6, and at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.5 and less than 0.675 and satisfies the following formula (73); and r / p is greater than or equal to 0.675 and less than 1.5 and satisfies the following formula (74), [Number 4] 0.21×r / p+0.02≤d / p≤1×r / p-0.08…Formula (61) 1.17×r / p-0.28≤d / p≤1.26×r / p+0.13…Formula (62) 0.21×r / p+0.02≤d / p≤1×r / p-0.08…Formula (63) 1.17×r / p-0.28≤d / p≤1.26×r / p+0.14…Formula (64) 0.21×r / p+0.01≤d / p≤0.71×r / p+0.05…Formula (65) 1.17×r / p-0.28≤d / p≤1.26×r / p+0.14…Formula (66) 0.29×r / p-0.95≤d / p≤-0.23×r / p+0.62…Formula (67) 1.2×r / p-0.3≤d / p≤1.2×r / p+0.21…Formula (68) 1.43×r / p-0.49≤d / p≤1.07×r / p+0.45…Formula (69) 1.19×r / p-0.28≤d / p≤1×r / p+0.5…Formula (70) 1.77×r / p-0.68≤d / p≤2.86×r / p-0.23…Formula (71) 1.15×r / p-0.23≤d / p≤0.64×r / p+1.13…Formula (72) 2.6×r / p-1.17≤d / p≤6.6×r / p-2.27…Formula (73) 1.27×r / p-0.33≤d / p≤0.35×r / p+1.78…Formula (7.4).

5. The display device according to any one of claims 1 to 4, wherein: When viewed from the normal direction of the plate surface of the light emitting substrate, one of the unit lenses corresponds to one of the second direction rows of unit regions formed by the plurality of unit regions arranged in the second direction.

6. The display device according to claim 5, wherein: When observed from the normal direction of the plate surface of the light-emitting substrate, the center of one of the unit lenses in the first direction is offset from the center of the light-emitting portion of the unit area in the second direction column constituting the corresponding unit area in the second direction column.

7. The display device according to any one of claims 1 to 4, wherein: The optical sheet has a first surface facing the light-emitting substrate and a second surface located on the opposite side of the first surface. The display device further includes a light deflecting layer that faces the second surface of the optical sheet and deflects light from the optical sheet so that a traveling direction of light changes when observed from the second direction.

8. The display device according to any one of claims 1 to 4, wherein: The optical sheet has a first surface facing the light-emitting substrate and a second surface located on the opposite side of the first surface. The display device further includes a light angle adjustment layer, which is located on the second surface side of the optical sheet and adjusts an angle of a traveling direction of light from the optical sheet with respect to a normal direction of a plate surface of the light emitting substrate.

9. The display device according to any one of claims 1 to 4, wherein: The light emitting substrate includes a first light emitting portion and a second light emitting portion that emits light having a wavelength different from that of the first light emitting portion as the light emitting portion.

10. The display device according to claim 1 or 3, wherein: The minimum brightness value m within the range of -5° to +5° with respect to the focusing direction of the optical sheet is 50% or more of the maximum brightness value M within the range of -5° to +5° with respect to the focusing direction of the optical sheet.

11. The display device according to claim 2 or 4, wherein: The minimum brightness value m2 within the range of -10° to +10° with respect to the focusing direction of the optical sheet is 50% or more of the maximum brightness value M2 within the range of -10° to +10° with respect to the focusing direction of the optical sheet.

12. A method for manufacturing a display device, the display device comprising: a light-emitting substrate having a semiconductor layer divided into a plurality of unit regions, and light-emitting portions arranged in the plurality of unit regions; and an optical sheet arranged opposite to the light-emitting substrate, wherein: The optical sheet has a plurality of unit lenses, the plurality of unit lenses are arranged in a first direction and extend in a second direction that is not parallel to the first direction. The plurality of unit regions are arranged in the first direction and the second direction, The pitch of the light emitting portions in the first direction is set to p, the width of the light emitting portions in the first direction is set to w, the radius of curvature of the lens surface of the unit lens is set to r, and the distance between the light emitting portion and the unit lens is set to d, and the manufacturing method of the display device includes an adjustment step of adjusting the radius of curvature r and the distance d according to the value of w / p, In the adjustment process, when w / p is less than 0.025, the curvature radius r and the distance d are adjusted so that at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (1); r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (2); r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (3); r / p is greater than or equal to 0.525 and less than 0.725 and satisfies the following formula (4); and r / p is greater than or equal to 0.725 and less than 1.5 and satisfies the following formula (5), In the adjustment process, when w / p is greater than or equal to 0.025 and less than 0.075, the curvature radius r and the distance d are adjusted so that at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (6); r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (7); r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (8); r / p is greater than or equal to 0.525 and less than 0.725 and satisfies the following formula (9); and r / p is greater than or equal to 0.725 and less than 1.5 and satisfies the following formula (10), In the adjustment step, when w / p is greater than or equal to 0.075 and less than 0.15, the curvature radius r and the distance d are adjusted so that at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.375 and satisfies the following formula (11); r / p is greater than or equal to 0.375 and less than 1.5 and satisfies the following formula (12); r / p is greater than or equal to 0.2 and less than 0.725 and satisfies the following formula (13); and r / p is greater than or equal to 0.725 and less than 1.5 and satisfies the following formula (14), In the adjustment step, when w / p is greater than or equal to 0.15 and less than 0.25, the curvature radius r and the distance d are adjusted so that at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.725 and satisfies the following formula (15); r / p is greater than or equal to 0.725 and less than 1.5 and satisfies the following formula (16); and r / p is greater than or equal to 0.2 and less than 1.5 and satisfies the following formula (17), In the adjustment step, when w / p is greater than or equal to 0.25 and less than 0.35, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.25 and less than 0.975 and satisfies the following formula (18); and r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (19), In the adjustment step, when w / p is greater than or equal to 0.35 and less than 0.45, the radius of curvature r and the distance d are adjusted so that r / p is greater than or equal to 0.3 and less than 1.5 and satisfies the following formula (20), In the adjustment step, when w / p is greater than or equal to 0.45 and less than 0.55, the radius of curvature r and the distance d are adjusted so that r / p is greater than or equal to 0.4 and less than 1.5 and satisfies the following formula (21), In the adjustment step, when w / p is greater than or equal to 0.55 and less than 0.65, the radius of curvature r and the distance d are adjusted so that r / p is greater than or equal to 0.45 and less than 1.5 and satisfies the following formula (22), [Number 5] 1.18×r / p-0.29≤d / p≤1.36×r / p-0.05…Formula (1) 1.18×r / p-0.29≤d / p≤2.08×r / p-0.15…Formula (2) 2.43×r / p+0.05≤d / p≤4.64×r / p-0.3…Formula (3) 4.5×r / p-0.85≤d / p≤4.64×r / p-0.3…Formula (4) 4.5×r / p-0.85≤d / p≤1.2×r / p+2.46…Formula (5) 1.18×r / p-0.29≤d / p≤1.36×r / p…Formula (6) 1.18×r / p-0.29≤d / p≤2.05×r / p-0.03…Formula (7) 2.57×r / p-0.01≤d / p≤4.65×r / p-0.3…Formula (8) 4.67×r / p-0.98≤d / p≤4.65×rp-0.3…Formula (9) 4.67×r / p-0.98≤d / p≤1.2×r / p+2.46…Formula (10) 1.18×r / p-0.29≤d / p≤4×r / p-0.1…Formula (11) 1.18×r / p-0.29≤d / p≤2.17×r / p-0.19…Formula (12) 4.79×r / p-1.09≤d / p≤5.07×r / p-0.58…Formula (13) 4.79×r / p-1.09≤d / p≤1.8×r / p+1.94…Formula (14) 1.18×r / p-0.29≤d / p≤4.84×r / p-0.45…Formula (15) 1.18×r / p-0.29≤d / p≤1.69×r / p+0.6…Formula (16) 5.6×r / p-1.84≤d / p≤1.8×r / p+1.94…Formula (17) 1.22×r / p-0.33≤d / p≤4.55×r / p-0.42…Formula (18) 1.22×r / p-0.33≤d / p≤1.04×r / p+1.78…Formula (19) 1.26×r / p-0.37≤d / p≤5.56×r / p-1.01…Formula (20) 1.28×r / p-0.39≤d / p≤5.83×r / p-1.29…Formula (21) 1.38×r / p-0.45≤d / p≤5.8×r / p-1.48…Formula (22).

13. A method for manufacturing a display device, the display device comprising: a light-emitting substrate having a semiconductor layer divided into a plurality of unit regions, and light-emitting portions arranged in the plurality of unit regions; and an optical sheet arranged opposite to the light-emitting substrate, wherein: The optical sheet has a plurality of unit lenses, the plurality of unit lenses are arranged in a first direction and extend in a second direction that is not parallel to the first direction. The plurality of unit regions are arranged in the first direction and the second direction, The pitch of the light emitting portions in the first direction is set to p, the width of the light emitting portions in the first direction is set to w, the radius of curvature of the lens surface of the unit lens is set to r, and the distance between the light emitting portion and the unit lens is set to d, and the manufacturing method of the display device includes an adjustment step of adjusting the radius of curvature r and the distance d according to the value of w / p, In the adjustment step, when w / p is less than 0.025, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (23); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (24). In the adjustment step, when w / p is greater than or equal to 0.025 and less than 0.15, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (25); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (26), In the adjustment step, when w / p is greater than or equal to 0.15 and less than 0.25, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (27); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (28), In the adjustment step, when w / p is greater than or equal to 0.25 and less than 0.35, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.25 and less than 0.425 and satisfies the following formula (29); and r / p is greater than or equal to 0.425 and less than 1.5 and satisfies the following formula (30), In the adjustment step, when w / p is greater than or equal to 0.35 and less than 0.45, the curvature radius r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.3 and less than 0.525 and satisfies the following formula (31); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (32), In the adjustment step, when w / p is greater than or equal to 0.45 and less than 0.55, the radius of curvature r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.4 and less than 0.625 and satisfies the following formula (33); and r / p is greater than or equal to 0.625 and less than 1.5 and satisfies the following formula (34), In the adjustment step, when w / p is greater than or equal to 0.55 and less than 0.65, the radius of curvature r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.45 and less than 0.625 and satisfies the following formula (35); and r / p is greater than or equal to 0.625 and less than 1.5 and satisfies the following formula (36), [Number 6] 1.18×r / p-0.29≤d / p≤1×r / p-0.02…Formula (23) 1.18×r / p-0.29≤d / p≤1.33×r / p+0.15…Formula (24) 1.18×r / p-0.29≤d / p≤1.14×r / p-0.04…Formula (25) 1.18×r / / p-0.29≤d / p≤1.3×r / p+0.18…Formula (26) 1.18=r / p-0.29≤d / p≤-0.29×r / p+0.73…Formula (27) 1.18×r / p-0.29≤d / p≤1.29×r / p+0.28…Formula (28) 1.22×r / p-0.33≤d / p≤4.6×r / p-052…Formula (29) 1.22×r / p-0.33≤d / p≤1.23×r / p+0.38…Formula (30) 1.26×r / p-0.37≤d / p≤5.4×r / p-0.96…2 Formula (31) 1.26×r / p-0.37≤d / p≤0.77×r / p+1.08…Formula (32) 1.28×r / p-0.39≤d / p≤5.83×r / p-1.29…Formula (33) 1.28×r / p-00.39≤d / p≤0.4×r / p+1.77…Formula (34) 1.38×r / p-0.45≤d / p≤7.6×r / p-2.44…Formula (35) 1.38×r / p-0.45≤d / p≤0.26×r / p+2.29…Formula (36).

14. A method for manufacturing a display device, the display device comprising: a light-emitting substrate having a semiconductor layer divided into a plurality of unit regions, and light-emitting portions arranged in the plurality of unit regions; and an optical sheet arranged opposite to the light-emitting substrate, wherein: The optical sheet has a plurality of unit lenses, the plurality of unit lenses are arranged in a first direction and extend in a second direction that is not parallel to the first direction. The plurality of unit regions are arranged in the first direction and the second direction, The pitch of the light emitting portions in the first direction is set to p, the width of the light emitting portions in the first direction is set to w, the radius of curvature of the lens surface of the unit lens is set to r, and the distance between the light emitting portion and the unit lens is set to d, and the manufacturing method of the display device includes an adjustment step of adjusting the radius of curvature r and the distance d according to the value of w / p, In the adjustment process, when w / p is greater than or equal to 0.01 and less than 0.05, the curvature radius r and the distance d are adjusted so that at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (37); r / p is greater than or equal to 0.525 and less than 0.975 and satisfies the following formula (38); r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (39); r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (40); and r / p is greater than or equal to 0.525 and less than 0.975 and satisfies the following formula (41), When w / p is greater than or equal to 0.05 and less than 0.1, the curvature radius r and the distance d are adjusted so that at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (42); r / p is greater than or equal to 0.525 and less than 0.975 and satisfies the following formula (43); r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (44); r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (45); and r / p is greater than or equal to 0.525 and less than 0.975 and satisfies the following formula (46), When w / p is greater than or equal to 0.1 and less than 0.2, the radius of curvature r and the distance d are adjusted so that at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.375 and satisfies the following formula (47); r / p is greater than or equal to 0.375 and less than 0.975 and satisfies the following formula (48); r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (49); and r / p is greater than or equal to 0.375 and less than 0.975 and satisfies the following formula (50), When w / p is greater than or equal to 0.2 and less than 0.3, the radius of curvature r and the distance d are adjusted so that at least any one of the following conditions is satisfied: r / p is greater than or equal to 0.25 and less than 0.725 and satisfies the following formula (51); r / p is greater than or equal to 0.725 and less than 0.975 and satisfies the following formula (52); r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (53); and r / p is greater than or equal to 0.725 and less than 0.975 and satisfies the following formula (54), When w / p is greater than or equal to 0.3 and less than 0.4, the radius of curvature r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.35 and less than 0.975 and satisfies the following formula (55); and r / p is greater than or equal to 0.975 and less than 1.5 and satisfies the following formula (56), When w / p is greater than or equal to 0.4 and less than 0.5, the radius of curvature r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.4 and less than 0.675 and satisfies the following equation (57); and r / p is greater than or equal to 0.675 and less than 1.5 and satisfies the following equation (58), When w / p is greater than or equal to 0.5 and less than 0.6, the radius of curvature r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.5 and less than 0.675 and satisfies the following equation (59); and r / p is greater than or equal to 0.675 and less than 1.5 and satisfies the following equation (60), [Number 7] 0.21×r / p+0.01≤d / p≤1×r / p-0.02…Formula (37) 1.4×r / p-0.45≤d / p≤2.23×r / p-0.4…Formula (38) 1.09×r / p-0.18≤d / p≤1.53×r / p+0.3…Formula (39) 2.43×r / p+0.05≤d / p≤3.57×r / p-0.21…Formula (40) 4.57×r / p-0.89≤d / p≤4×r / p-0.3…Formula (41) 0.21×r / p+0.01≤d / p≤0.79×r / p+0.11…Formula (42) 1.4×r / p-0.45≤d / p≤2.23×r / p-0.4…Formula (43) 1.09×r / p-0.18≤d / p≤1.56×r / p+0.27…Formula (44) 2.57×r / p-0.01≤d / p≤3.43×r / p-0.17…Formula (45) 4.77×r / p-1.04≤d / p≤4.13×r / p-0.41…Formula (46) 0.6×r / p-0.09≤d / p≤4×r / p-0.4…Formula (47) 1.53×r / p-0.56≤d / p≤2.27×r / p-0.35…Formula (48) 1.09×r / p-0.18≤d / p≤1.56×r / p+0.28…Formula (49) 4.79×r / p-1.09≤d / p≤4.41×r / p-0.64…Formula (50) 1.03×r / p-0.26≤d / p≤4.39×r / p-0.64…Formula (51) 1.4×r / p-0.45≤d / p≤0.4×r / p+1.58…Formula (52) 1.15×r / p-0.24≤d / p≤1.49×r / p+0.54…Formula (53) 5.6×r / p-1.84≤d / p≤4×r / p-0.3…Formula (54) 1.45×r / p-0.5≤d / p≤4.45×r / p-0.77…Formula (55) 1.16×r / p-0.25≤d / p≤0.335×r / p+2.51…Formula (56) 1.77×r / p-0.68≤d / p≤5.43×r / p-1.43…Formula (57) 1.13×r / p-0.22≤d / p≤3.23×r / p+0.13…Formula (58) 2.6×r / p-1.17≤d / p≤6.6×r / p-2.27…Formula (59) 1.27×r / p-0.33≤d / p≤3.3×r / p-0.06…Formula (60).

15. A method for manufacturing a display device, the display device comprising: a light-emitting substrate having a semiconductor layer divided into a plurality of unit regions, and light-emitting portions arranged in the plurality of unit regions; and an optical sheet arranged opposite to the light-emitting substrate, wherein: The optical sheet has a plurality of unit lenses, the plurality of unit lenses are arranged in a first direction and extend in a second direction that is not parallel to the first direction. The plurality of unit regions are arranged in the first direction and the second direction, The pitch of the light emitting portions in the first direction is set to p, the width of the light emitting portions in the first direction is set to w, the radius of curvature of the lens surface of the unit lens is set to r, and the distance between the light emitting portion and the unit lens is set to d, and the manufacturing method of the display device includes an adjustment step of adjusting the radius of curvature r and the distance d according to the value of w / p, In the adjustment step, when w / p is greater than or equal to 0.01 and less than 0.05, the radius of curvature r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following formula (61); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following formula (62), When w / p is greater than or equal to 0.05 and less than 0.1, the radius of curvature r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following equation (63); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following equation (64), When w / p is greater than or equal to 0.1 and less than 0.2, the radius of curvature r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.2 and less than 0.525 and satisfies the following equation (65); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following equation (66), When w / p is greater than or equal to 0.2 and less than 0.3, the radius of curvature r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.25 and less than 0.525 and satisfies the following equation (67); and r / p is greater than or equal to 0.525 and less than 1.5 and satisfies the following equation (68), When w / p is greater than or equal to 0.3 and less than 0.4, the radius of curvature r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.35 and less than 0.675 and satisfies the following equation (69); and r / p is greater than or equal to 0.675 and less than 1.5 and satisfies the following equation (70), When w / p is greater than or equal to 0.4 and less than 0.5, the radius of curvature r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.4 and less than 0.675 and satisfies the following equation (71); and r / p is greater than or equal to 0.675 and less than 1.5 and satisfies the following equation (72), When w / p is greater than or equal to 0.5 and less than 0.6, the radius of curvature r and the distance d are adjusted so that at least one of the following conditions is satisfied: r / p is greater than or equal to 0.5 and less than 0.675 and satisfies the following equation (73); and r / p is greater than or equal to 0.675 and less than 1.5 and satisfies the following equation (74), [Number 8] 0.21×r / p+0.02≤d / p≤1×r / p-0.08…Formula (61) 1.17×r / p-0.28≤d / p≤1.26×r / p+0.13…Formula (62) 0.21×r / p+0.02≤d / p≤1×r / p-0.08…Formula (63) 1.17×r / p-0.28≤d / p≤1.26×r / p+0.14…Formula (64) 0.21×r / p+0.01≤d / p≤0.71×r / p+0.05…Formula (65) 1.17×r / p-0.28≤d / p≤1.26×r / p+0.14…Formula (66) 0.29×r / p-0.05≤d / p≤-0.23×r / p+0.62…Formula (67) 1.2×r / p-0.3≤d / p≤1.2×r / p+0.21…Formula (68) 1.43×r / p-0.49≤d / p≤1.07×r / p+0.45…Formula (69) 1.19×r / p-0.28≤d / p≤1×r / p+0.5…Formula (70) 1.77×r / p-0.68≤d / p≤2.86×r / p-0.23…Formula (71) 1.15×r / p-0.23≤d / p≤0.64×r / p+1.13…Formula (72) 2.6×r / p-1.17≤d / p≤6.6×r / p-2.27…Formula (73) 1.27×r / p-0.33≤d / p≤0.35×r / p+1.78…Formula (74).

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