Display device

Abstract

To provide a display device that has high design property.SOLUTION: A display device 1 comprises: a light-emitting substrate 10 on which light-emitting parts 12 are arranged at a prescribed interval, with a plurality of light-emitting parts 12 arranged on one side of a wiring board 11; and a pattern layer 20 that is positioned on an observer side of the light-emitting substrate 10 when viewed from a thickness direction of the display device 1. The light-emitting part 12 has a first light-emitting body 12R that emits light of a certain wavelength, a second light-emitting body 12G that emits light of a wavelength which is different from the first light-emitting body 12R, and a third light-emitting body 12B that emits light of a wavelength which is different from the first light-emitting body 12R and the second light-emitting body 12G. The first light-emitting body 12R, the second light-emitting body 12G and the third light-emitting body 12B are micro-sized LED elements. The pattern layer 20 has a pattern 21 formed in areas between the arranged light-emitting parts 12 when viewed from the thickness direction of the display device 1.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a display device.

Background Art

[0002] Conventionally, in a display device that is not displaying an image, the screen is often displayed in black. In recent years, display devices using micro-LED display elements (for example, Patent Document 1) have begun to spread. However, even in such a display device, when no image is being displayed, the entire screen is black. This is because in a display device using micro-LED display elements, from the viewpoint of enhancing the contrast of the image, the area between the micro-LEDs arranged at a predetermined interval becomes black due to coloring or the like.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

[0004] However, there is an opinion that it is not preferable from the viewpoint of design or the like that the black screen of a display device that is not displaying an image is visually recognized indoors. Also, when the display device has a large screen, there is a problem that the black screen is conspicuous indoors and harmony with other interior elements in the room cannot be achieved.

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object of the present invention is to provide a display device having high design quality.

Means for Solving the Problems

[0006] The present invention solves the above problems by the following means. For easy understanding, reference numerals corresponding to embodiments of the present invention are used in the description, but the present invention is not limited thereto. A first invention is a display device in which light emitting units (12) are arranged at predetermined intervals, including a light emitting substrate (10, 210) on which a plurality of the light emitting units are arranged on one side of a wiring substrate (11), and a pattern layer (20, 220) arranged on the observer side or the back side of the light emitting substrate when viewed from the thickness direction of the display device. The pattern layer has a pattern (21) visible when the light emitting unit is turned off formed in at least a region (17) between the arranged light emitting units when viewed from the thickness direction of the display device. The display device (1, 2, 3) is characterized by this. A second invention is the display device according to the first invention, wherein the pattern layer (20) is laminated on the observer side of the light emitting substrate (10) in the thickness direction of the display device, and has a through hole (22) capable of accommodating the light emitting unit at a position corresponding to the light emitting unit (12) when viewed from the thickness direction of the display device. The display device (1) is characterized by this. A third invention is the display device according to the first invention, wherein the light emitting substrate (210) has transparency, and the pattern layer (220) is laminated on the back side of the light emitting substrate. The display device (2) is characterized by this. A fourth invention is the display device according to the third invention, wherein a light control layer (50) capable of adjusting the light transmittance is provided between the light emitting substrate (210) and the pattern layer (220). The light control layer is in a light shielding state with the minimum light transmittance when the light emitting unit (12) is lit, and is in a light transmitting state with the maximum light transmittance when the light emitting unit is turned off. The display device (3) is characterized by this. A fifth invention is the display device according to the fourth invention, wherein the light control layer (50) is a light control film including a liquid crystal layer having a normally clear structure that is in a light transmitting state when no voltage is applied. The display device (3) is characterized by this.

Advantages of the Invention

[0007] According to the present invention, a display device having high design quality can be provided.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Modes for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings and the like. Note that each of the drawings shown below, including FIG. 1, is a schematic diagram, and the size and shape of each part are exaggerated as appropriate for easy understanding. In this specification, terms specifying shapes and geometric conditions, such as terms like parallel and orthogonal, in addition to their strict meanings, also include states having errors to the extent that they exhibit similar optical functions and can be regarded as parallel or orthogonal. Also, the numerical values such as the dimensions of each member described in this specification and the material names are examples as embodiments, and are not limited thereto, and may be appropriately selected and used.

[0010] In this specification, words such as plate, sheet, and film are used. Generally, in terms of usage, in the order of increasing thickness, they are used in the order of plate, sheet, and film, and this specification also follows this usage. However, since such distinctions in usage have no technical meaning, these expressions can be replaced as appropriate.

[0011] (First Embodiment) FIG. 1 is a diagram for explaining a display device 1 according to the first embodiment. In FIG. 1, a cross-section of the display device 1 in the thickness direction is schematically shown. As shown in FIG. 1, the display device 1 of the present embodiment includes a light-emitting substrate 10 and a pattern layer 20 in order from the back side to the observer side in the thickness direction. In FIG. 1, for ease of understanding, the members constituting the display device 1 are shown as being spaced apart in the thickness direction of the display device 1. However, in the present embodiment, the pattern layer 20 is integrally laminated on the observer side of the light-emitting substrate 10.

[0012] For ease of understanding, an XYZ orthogonal coordinate system is provided in each of the following figures including FIG. 1 for ease of explanation and understanding. The display surface of the display device 1 is parallel to the XY plane, and the thickness direction of the display device is the Z direction. Also, when viewed from an observer (not shown) located in the front direction of the screen of the display device 1, the horizontal direction of the screen is the X direction, and the vertical direction of the screen is the Y direction. Further, the direction toward the right side of the screen in the horizontal direction of the screen is the +X direction, the direction toward the upper side of the screen in the vertical direction of the screen is the +Y direction, and the direction from the back side to the observer side in the thickness direction is the +Z direction.

[0013] The display device 1 of the present embodiment is a so-called micro LED display that uses light emitted from one or more light-emitting diodes as one pixel. Examples of applications of the display device 1 include general display devices used for viewing videos, etc., in addition to smartphones, wristwatches, glasses for displaying images of AR (Augmented Reality) and VR (Virtual Reality), and the like. The display screen (the area where an image is displayed) of the display device 1 of the present embodiment is, for example, rectangular, and the length of its diagonal is about 40 to 80 inches. Note that the shape and size of the display screen are not limited to this.

[0014] FIG. 2 is an enlarged view of a part of the cross-section of the light-emitting substrate 10. The light-emitting substrate 10 is a part that emits light for forming an image to be displayed on the display screen of this display device 1, and a plurality of light-emitting portions 12 are arranged at predetermined intervals. As shown in FIG. 2, the light-emitting substrate 10 includes a wiring substrate 11 and a plurality of light-emitting portions 12 provided on the surface of the wiring substrate 11 on the observer side (+Z side). The light-emitting portion 12 is a part that emits light and is connected to an electrode (not shown) of the wiring substrate 11. The surface of the light-emitting portion 12 on the side opposite to the wiring substrate 11 is the light-emitting surface 12a. Note that the light-emitting substrate 10 may include a holding plate for holding the wiring substrate 11 on the back side of the wiring substrate 11. The wiring substrate 11 can be of various types. For example, in the present embodiment, it is a printed wiring substrate.

[0015] The light-emitting portion 12 of the present embodiment is in the so-called LED chip form, and includes a first light-emitting body 12R that emits light of a certain wavelength, a second light-emitting body 12G that emits light of a wavelength different from that of the first light-emitting body 12R, and a third light-emitting body 12B that emits light of a wavelength different from those of the first light-emitting body 12R and the second light-emitting body 12G. In the present embodiment, the first light-emitting body 12R, the second light-emitting body 12G, and the third light-emitting body 12B are LED (light-emitting diode) elements. The first light-emitting body 12R emits red light in the wavelength range of 620 nm to 680 nm, the second light-emitting body 12G emits green light in the wavelength range of 530 nm to 570 nm, and the third light-emitting body 12B emits blue light in the wavelength range of 440 nm to 480 nm. In addition, the first light-emitting body 12R, the second light-emitting body 12G, and the third light-emitting body 12B of the present embodiment are micro-sized LED elements (so-called micro-LED elements), and the light-emitting portion 12 composed of these three light-emitting bodies has a size of 1 μm square or more and 50 μm square or less.

[0016] FIG. 3 is a view of the light-emitting substrate 10 and the pattern layer 20 of the display device 1 in the first embodiment as viewed from the observer side. In FIG. 3, a part of the display area of the display device 1 is enlarged and shown for easy understanding. Further, for easy understanding, the light-emitting portion 12 is shown with a square outer shape when viewed from the thickness direction (Z direction) of the display device 1, but it is not limited thereto, and the outer shape of the light-emitting portion 12 when viewed from the thickness direction (Z direction) of the display device 1 may be, for example, a circular shape, an elliptical shape, or other polygonal shapes.

[0017] The wiring substrate 11 is divided into a plurality of unit areas 111. In FIG. 3, one unit area 111 is shown in a hatched state. In the example shown in FIG. 3, the unit areas 111 are arranged along a first direction d1 and a second direction d2 parallel to the plane direction of the wiring substrate 11. The first direction d1 and the second direction d2 are non-parallel and intersect. In the present embodiment, the first direction d1 and the second direction d2 are orthogonal. Also, in the present embodiment, the first direction d1 is parallel to the X direction, and the second direction d2 is parallel to the Y direction.

[0018] In the present embodiment, light-emitting portions 12 each including three light-emitting elements (first light-emitting element 12R, second light-emitting element 12G, and third light-emitting element 12B) are arranged one by one at the center of each unit area 111. The unit area 111 serves as a pixel area of the display device 1, and the light-emitting portion 12 arranged in each unit area 111 forms a pixel of the display device 1. The dimensions of the unit area 111 in the first direction d1 and the second direction d2 are, for example, 10 μm or more and 100 μm or less. Also, the dimensions of the light-emitting portion 12 in the first direction d1 and the second direction d2 are, for example, 1 μm or more and 50 μm or less. Note that the present invention is not limited to this, and the light-emitting portion 12 may have only one light-emitting element (any one of the first light-emitting element 12R, the second light-emitting element 12G, and the third light-emitting element 12B) in each unit area 111. In this example, the unit area 111 forms a sub-pixel area, and forms one pixel with another unit area 111 having a light-emitting portion that emits light of different wavelengths.

[0019] In this embodiment, as described above, the light-emitting unit 12 is disposed at the center of each unit region 111. Therefore, the arrangement pitch of the light-emitting unit 12 in the first direction d1 (X direction) and the arrangement pitch in the second direction d2 (Y direction) are respectively equal to the dimension of the unit region 111 in the first direction d1 and the dimension in the second direction d2. Let the arrangement pitch of the light-emitting unit 12 in the first direction d1 (X direction) be P1, and the arrangement pitch in the second direction d2 (Y direction) be P2. In this embodiment, the arrangement pitch P1 and the arrangement pitch P2 are equal, satisfying P1 = P2.

[0020] The region between the light-emitting units 12 of the wiring substrate 11, that is, the region other than the region where the light-emitting unit 12 is located, is a non-light-emitting region 17 that does not emit light. In the non-light-emitting region 17, electrodes, circuits, etc. (not shown) provided on the wiring substrate 11 for lighting the light-emitting unit 12 are formed.

[0021] The pattern layer 20 is a layer provided on the observer side of the light-emitting substrate 10, and a pattern 21 is formed on the surface on the observer side (+Z side). The pattern layer 20 has through holes 22 formed at positions corresponding to the light-emitting units 12. That is, the pattern 21 is formed in a region other than the through holes 22 (light-emitting units 12). As shown in FIG. 3, when viewed from the observer side, the light-emitting unit 12 is in a form located inside the through hole 22. Therefore, although the pattern layer 20 is laminated on the observer side of the light-emitting substrate 10, most of the light emitted by the light-emitting unit 12 can reach the observer side without being blocked by the pattern layer 20. The pattern layer 20 of this embodiment is formed, for example, by printing the pattern 21 on one side of an opaque sheet-like member. As this opaque sheet-like member, a polyethylene terephthalate (PET) film, a TAC film, a polycarbonate (PC) film, etc. are suitable. Also, the thickness of the pattern layer 20 is preferably 20 μm or more and 100 μm or less.

[0022] The through-hole 22 is not particularly limited as long as the light-emitting portion 12 can be located inside thereof, the shape and size are such that the light emitted from the light-emitting portion 12 is not blocked, and the size is sufficient to display the pattern 21. The pattern 21 may be, for example, various patterns such as a woodgrain pattern, a checkered pattern, a damask pattern, a Mondrian pattern, etc., may be a landscape painting, etc., or may be a logo of the manufacturing company of the display device 1, etc., and is not particularly limited.

[0023] Next, the appearance of the display device 1 in this embodiment during video display and non-video display will be described. FIG. 4 is a diagram showing the display screens of the display device 1 in the first embodiment during video display and non-video display. FIG. 4(a) shows the display screen during video display, and FIG. 4(b) shows the display screen during non-video display. When the display device 1 displays a video, a voltage is applied to the light-emitting substrate 10, and the light-emitting portion 12 emits light. The light emitted from the light-emitting portion 12 is emitted toward the observer side (+Z side). As a result, as shown in FIG. 4(a), a video is displayed on the display screen of the display device 1. At this time, since the light (video light) emitted from the light-emitting portion 12 has a greater light intensity than the light (external light) reflected by the pattern layer 20, the pattern 21 of the pattern layer 20 is not visible to the observer, and the video is visible.

[0024] Next, in the display device 1, the display of the video is stopped. At this time, the application of the voltage to the light-emitting substrate 10 is stopped, and the light emission of the light-emitting portion 12 stops. As a result, as shown in FIG. 4(b), the pattern 21 of the pattern layer 20 is visibly displayed on the display screen of the display device 1. In this embodiment, as shown in FIG. 4(b), a checkered pattern is displayed as the pattern 21. That is, in the display device 1 of this embodiment, a video can be displayed on the display screen during video display, and the pattern 21 of the pattern layer 20 can be displayed on the display screen during non-video display.

[0025] Conventionally, in such a micro-LED display device, the wiring substrate 11 (non-emitting region 17) was black, or a light absorption layer such as black was formed on the observer side of the non-emitting region 17 of the wiring substrate 11. This is for improving the contrast of the displayed video. Therefore, in the conventional micro-LED display device, the display screen during non-video display is visually recognized as entirely black. However, with the increase in the size of the display device, etc., when the display device is not in use, there will be a large black screen indoors, etc., and it will not be possible to achieve harmony with other interior elements in the room, resulting in a loss of the design property of the room, or giving a sense of intimidation to the people in the room.

[0026] In contrast, the display device 1 of the present embodiment displays the video without the pattern 21 being visually recognized during video display, and during non-video display, instead of a black screen, the pattern 21 of the pattern layer 20 can be visually recognized, enabling a display device 1 with high design property. Note that it is more preferable that the pattern 21 is configured mainly with dark colors, as it can improve the contrast of the video during video display. However, it is not limited to this, and the color tone, brightness, etc. of the pattern 21 can be appropriately selected.

[0027] (Second Embodiment) FIG. 5 is a diagram for explaining the display device 2 of the second embodiment. In FIG. 5, similar to FIG. 2 of the first embodiment described above, a cross-section in the thickness direction of the display device 2 is schematically shown. The display device 2 of the second embodiment has the same form as the display device 1 shown in the first embodiment described above, except that the wiring substrate 211 of the light-emitting substrate 210 is transparent and the pattern layer 220 is located on the back side (-Z side) of the light-emitting substrate 210. Therefore, for the parts that perform the same functions as those in the first embodiment described above, the same reference numerals or the same reference numerals with the same endings are attached, and the overlapping explanations are appropriately omitted.

[0028] As shown in FIG. 5, the display device 2 of the present embodiment includes a pattern layer 220 and a light-emitting substrate 210 in order from the back side (-Z side) to the video source side in the thickness direction. In addition, in FIG. 5, for ease of understanding, the components constituting the display device 2 are shown as being spaced apart in the thickness direction (Z direction) of the display device 2. However, in the present embodiment, the pattern layer 220 is integrally laminated on the back side (-Z side) of the light-emitting substrate 210.

[0029] The light-emitting substrate 210 of the present embodiment has a wiring substrate 211 and a plurality of light-emitting portions 12 provided on the wiring substrate 211. The wiring substrate 211 is formed, for example, by using a transparent base material such as a PET film or a transparent polyimide, and forming a transparent circuit, electrodes, etc. on one side thereof. The electrodes, circuits, etc. (not shown) on the wiring substrate 211 are formed of a material having transparency. The electrodes are preferably formed of, for example, ITO (Indium Tin Oxide) or a silver nanomesh. Also, the circuits are preferably formed of, for example, a transparent oxide semiconductor (TOS). As a result, the non-light-emitting region 17 of the wiring substrate 211 is transparent. Note that the circuits, etc. are preferably formed under (-Z side) the light-emitting portions 12 so as not to obstruct the visual recognition of the pattern 21 of the pattern layer 20 when the pattern 21 of the pattern layer 20 is visually recognized.

[0030] Here, "transparent" means that the non-light-emitting region 17 has transparency such that it can be seen through from one side to the other side. For example, it means having a visible light transmittance of 30% or more, more preferably 70% or more. The visible light transmittance is specified as the average value of the transmittances at each wavelength when measured in the wavelength range of 380 nm to 780 nm using a spectrophotometer ("UV-3100PC" manufactured by Shimadzu Corporation, compliant with JIS K 0115). The pattern layer 220 is a layer in which the pattern 21 is formed in the same manner as the pattern layer 20 of the first embodiment, but is different from the pattern layer 20 of the first embodiment in that the through holes 22 are not formed.

[0031] In the display device 2 of the present embodiment, when displaying an image, a voltage is applied to the light-emitting substrate 210, and the light-emitting unit 12 emits light. The light emitted by the light-emitting unit 12 is emitted toward the observer side. As a result, an image is visibly displayed on the display screen of the display device 1. At this time, the pattern 21 of the pattern layer 220 is not visible. Also, in the display device 2, when not displaying an image, the light emission of the light-emitting unit 12 is stopped. As a result, the pattern 21 of the pattern layer 220 located on the back side of the light-emitting substrate 210 is visibly displayed on the display screen of the display device 1 through the non-light-emitting region 17 of the transparent wiring substrate 211.

[0032] As described above, also in the present embodiment, similar to the first embodiment, a display device 2 with high design quality can be provided. Further, according to the present embodiment, since the pattern layer 220 of the display device 2 does not have through holes corresponding to the positions of the light-emitting units 12, it can be manufactured easily and inexpensively.

[0033] (Third Embodiment) FIG. 6 is a diagram for explaining the display device 3 of the third embodiment. In FIG. 6, similar to FIG. 2 of the first embodiment described above, a cross-section in the thickness direction of the display device 3 is schematically shown. The display device 3 of the third embodiment is different from the display device 1 shown in the first embodiment in that it includes a dimming layer 50 and that it includes a pattern layer 220 as shown in the second embodiment on the back side of the light-emitting substrate 210, but other than that, it has the same form as the display device 1 shown in the first embodiment. Therefore, parts that perform the same functions as those in the first embodiment or the second embodiment described above are denoted by the same reference numerals or the same reference numerals at the end, and duplicate explanations are omitted as appropriate. As shown in FIG. 6, the display device 3 of the present embodiment includes a pattern layer 220, a dimming layer 50, and a light-emitting substrate 210 in order from the back side to the image source side in the thickness direction (Z direction) thereof. Also, in FIG. 6, for ease of understanding, each member constituting the display device 3 is shown as being spaced apart in the thickness direction (Z direction) of the display device 3, but in the present embodiment, the pattern layer 220 and the dimming layer 50 are integrally laminated on the back side surface of the light-emitting substrate 210.

[0034] The light control layer 50 is a layer whose transmittance can be adjusted as appropriate. When the display device 3 displays an image, the transmittance is minimized, and it is visually recognized as dark and opaque. When it is not displaying an image, the transmittance is maximized, and it becomes transparent. In this embodiment, the light control layer 50 uses a light control film in which a liquid crystal layer is sandwiched between a base material layer and an electrode layer, and the light transmittance of the liquid crystal layer can be adjusted according to the voltage applied to the liquid crystal layer. Also, the light control layer 50 of this embodiment uses a light control film having a so-called normally clear structure in which the light transmittance is minimized when a voltage is applied to the liquid crystal layer and the light transmittance is maximized when no voltage is applied to the liquid crystal layer. Therefore, the light control layer 50 becomes a light-shielding state and black and opaque when a voltage is applied, and becomes a light-transmitting state and transparent when no voltage is applied. Moreover, not limited to this, as the light control layer 50, for example, a light control member such as a photochromic or electrochromic member may be used.

[0035] In the display device 3 of this embodiment, when displaying an image, a voltage is applied to the light-emitting substrate 210, and the light-emitting unit 12 emits light. The light emitted from the light-emitting unit 12 is emitted toward the observer side, and an image is displayed on the display screen. Also, when displaying an image, a voltage is also applied to the light control layer 50, and the light transmittance of the light control layer 50 is minimized, becoming a light-shielding state. Therefore, the pattern 21 of the pattern layer 220 cannot be visually recognized, and since the back side of the light-emitting substrate 210 becomes black, the contrast of the image is improved. Also, in the display device 3, when not displaying an image, the light emission of the light-emitting unit 12 is stopped, and the voltage application to the light control layer 50 is also released. As a result, the light control layer 50 becomes transparent with its maximum transmittance, and the pattern 21 of the pattern layer 20 is visibly displayed on the display screen.

[0036] Therefore, also in this embodiment, a display device 3 with high design quality can be provided. Also, according to this embodiment, when the display device 3 displays an image, the light control layer 50 becomes opaque black and hides the pattern 21, and the back side of the light-emitting substrate 210 is black, so the contrast of the image is improved.

[0037] (Modified form) Without being limited to the embodiments described above, various modifications and changes are possible. (1) In each embodiment, an example in which the pattern 21 is formed on the observer side surface of the pattern layers 20 and 220 has been shown. However, the present invention is not limited to this. For example, a transparent sheet or film may be used as the main body of the pattern layers 20 and 220, and the pattern 21 may be provided on the back surface of the pattern layers 20 and 220.

[0038] (2) In the first embodiment, an example in which the pattern layer 20 has the through holes 22 has been shown. However, the present invention is not limited to this. The pattern 21 may not be formed only at the position corresponding to the light emitting portion 12, and it may be a transparent portion having high transparency.

[0039] (3) In each embodiment, a transparent sheet-like protective layer (not shown) may be provided at the position closest to the observer side in the thickness direction of the display devices 1, 2, and 3. This protective layer is a member for protecting the pattern layer 20, the light emitting substrate 210, etc., and may further have a hard coat function, an antifouling function, an antistatic function, a reflection suppression function, etc. Further, in each embodiment, it may be configured to include a touch panel layer at the position closest to the observer side in the thickness direction of the display devices 1, 2, and 3.

[0040] Note that each embodiment and the modified form can be used in appropriate combination, but detailed description thereof is omitted.

Explanation of reference numerals

[0041] 1, 2, 3 Display device 10, 210 Light emitting substrate 11, 211 Wiring substrate 12 Light emitting portion 17 Non-light emitting region 20, 220 Pattern layer 50 Dimming layer

Claims

1. A display device in which light-emitting units are arranged at a predetermined interval, comprising: a light-emitting substrate on one side of a wiring substrate, on which a plurality of the light-emitting units are arranged; a pattern layer disposed on the observer side of the light-emitting substrate when viewed from the thickness direction of the display device; and the light-emitting unit includes a first light-emitting body that emits light of a certain wavelength, a second light-emitting body that emits light of a wavelength different from that of the first light-emitting body, and a third light-emitting body that emits light of a wavelength different from those of the first light-emitting body and the second light-emitting body; the first light-emitting body, the second light-emitting body, and the third light-emitting body are micro-sized LED elements; the pattern layer has a pattern formed in a region between the arranged light-emitting units when viewed from the thickness direction of the display device. A display device characterized by the above.

2. In the display device according to Claim 1, the pattern layer has a through hole; the light-emitting unit is located inside the through hole when viewed from the observer side. A display device characterized by the above.

3. In the display device according to Claim 2, the size of the through hole is larger than the size of the light-emitting unit when viewed from the observer side. A display device characterized by the above.

4. In the display device according to Claim 1, the pattern layer has a through hole; the size of the through hole is larger than the size of the light-emitting unit when viewed from the observer side. A display device characterized by the above.

5. A display device in which light-emitting units are arranged at a predetermined interval, comprising: a light-emitting substrate on one side of a wiring substrate, on which a plurality of the light-emitting units are arranged; a pattern layer disposed on the back side of the light-emitting substrate when viewed from the thickness direction of the display device; a dimming layer capable of adjusting the light transmittance between the light-emitting substrate and the pattern layer; and the light-emitting unit includes a first light-emitting body that emits light of a certain wavelength, a second light-emitting body that emits light of a wavelength different from that of the first light-emitting body, and a third light-emitting body that emits light of a wavelength different from those of the first light-emitting body and the second light-emitting body; the first light-emitting body, the second light-emitting body, and the third light-emitting body are micro-sized LED elements; the light-emitting substrate has transparency; the dimming layer becomes in a light-shielding state and opaque black when the light-emitting unit emits light. A display device characterized by the above.

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