Light emitting device and display device including the same

Abstract

The invention discloses a light emitting device and a display device including the same. The light-emitting device comprises a substrate, a light-emitting array and a plurality of first color conversion points. The light-emitting array is arranged on the substrate and comprises a plurality of light-emitting units. Wherein each of the plurality of light-emitting units comprises an LED crystal grain and a packaging part. The LED crystal grains are arranged on the substrate. The packaging part is arranged on the substrate and wraps the LED crystal grains. The plurality of first color conversion points are arranged on the substrate and surround the light-emitting array. Wherein the plurality of first color conversion points comprise a first wavelength conversion material.

Description

Technical Field

[0001] The present invention relates to a light emitting device and a display device including the same, and in particular to a light emitting device including a color conversion point and a display device including the light emitting device. Background Art

[0002] With the advancement of light-emitting diode (LED) manufacturing technology, it has gradually developed towards smaller sub-millimeter light-emitting diodes (Mini LED) and micro light-emitting diodes (micro LED). However, existing MiniLED light panels have the problem of uneven brightness, such as dark bands or strip defects (mura) between adjacent light-emitting diodes, thereby reducing color uniformity or brightness uniformity. Summary of the invention

[0003] In some embodiments, a light-emitting device is provided. The light-emitting device includes a substrate, a light-emitting array, and a plurality of first color conversion points. The light-emitting array is disposed on the substrate and includes a plurality of light-emitting units. Each of the plurality of light-emitting units includes a light-emitting diode (LED) die and an encapsulating portion. The LED die is disposed on the substrate. The encapsulating portion is disposed on the substrate and covers the LED die. A plurality of first color conversion points are disposed on the substrate and surround the light-emitting array. The plurality of first color conversion points include a first wavelength conversion material.

[0004] In some embodiments, a display device is provided. The display device includes a light-emitting device. The light-emitting device includes a substrate, a light-emitting array, and a plurality of first color conversion points. The light-emitting array is disposed on the substrate and includes a plurality of light-emitting units. Each of the plurality of light-emitting units includes a light-emitting diode die and a packaging portion. The LED die is disposed on the substrate. The packaging portion is disposed on the substrate and covers the LED die. A plurality of first color conversion points are disposed on the substrate and surround the light-emitting array. The plurality of first color conversion points include a first wavelength conversion material.

[0005] The light emitting device and display device of the present invention can be applied to various types of electronic devices. In order to make the features and advantages of the present invention more obvious and easy to understand, various embodiments are given below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Through the following detailed description in conjunction with the attached drawings, the viewpoints of the embodiments of the present invention can be better understood. It is worth noting that, according to standard practices in the industry, some components may not be drawn to scale. In fact, the sizes of different components may be increased or reduced in order to clearly describe.

[0007] Figure 1 Schematic diagrams showing the lighting device of the present invention in some embodiments;

[0008] Figure 2 Schematic top views of the light emitting devices of the present invention are shown for some embodiments;

[0009] Figure 3 Schematic top views of the light emitting devices of the present invention are shown for some embodiments;

[0010] Figure 4 Schematic top views of the light emitting devices of the present invention are shown for some embodiments;

[0011] Figure 5 Schematic cross-sectional views of the light emitting device of the present invention are shown for some embodiments;

[0012] Figure 6 Schematic top views of the light emitting devices of the present invention are shown for some embodiments;

[0013] Figure 7 Schematic cross-sectional views of the light emitting device of the present invention are shown for some embodiments;

[0014] Figure 8 Schematic top views of the light emitting devices of the present invention are shown for some embodiments;

[0015] Fig. 9 Schematic cross-sectional views of the light emitting device of the present invention are shown for some embodiments;

[0016] Fig.10 Schematic top views of the light emitting devices of the present invention are shown for some embodiments;

[0017] Fig.11 Schematic cross-sectional views of the light emitting device of the present invention are shown for some embodiments;

[0018] Fig. 12A Schematic diagram showing the brightness of the light emitting device of the present invention in some embodiments;

[0019] Fig. 12B Schematic diagram showing the brightness of the light-emitting device of the present invention in some embodiments;

[0020] Fig. 12C Schematic diagram showing the brightness of the light-emitting device of the present invention in some embodiments;

[0021] Fig.13The following is a schematic top view of a display device according to some embodiments of the present invention.

[0022] DESCRIPTION OF SYMBOLS 1, 1', 2, 3, 4: Light-emitting device

[0023] 5: Display device

[0024] 10:Substrate

[0025] 10A: First Area

[0026] 10B: Second Area

[0027] 12: Reflection layer

[0028] 14: Optical layer

[0029] 14A:Diffuser

[0030] 14B: Brightness enhancement film

[0031] 14C: Dual brightness enhancement film

[0032] 20: Light Array

[0033] U11, U12, U13, U1n, U21, U22, U23, U2n, U31, U32, U33, Um1, Umn: Lighting Unit

[0034] 22: Grain

[0035] 23: Contact pad

[0036] 24: Packaging Department

[0037] 30: First color conversion point

[0038] 40, 42: Light guide structure

[0039] 50: Second color transition point

[0040] 60: Third color transition point

[0041] A-A', B-B', C-C', D-D': Line segments

[0042] D1: First direction

[0043] D2: Second direction

[0044] DA1: First diagonal

[0045] DA2: Second diagonal

[0046] E1: First side

[0047] E2: Second side

[0048] H e :high

[0049] H1: First Height

[0050] H2: Second Height

[0051] H3: The third height

[0052] H4: The fourth height

[0053] L12, L21, L22: Light

[0054] p1, p2, p3, p4: distance

[0055] R: Partial area

[0056] W e : Bottom width

[0057] W1: first bottom width

[0058] W2: Second bottom width

[0059] W3: Third bottom width

[0060] W4: Fourth bottom width DETAILED DESCRIPTION

[0061] The following is a detailed description of the light-emitting device and the display device of each embodiment of the present invention. It should be understood that the following description provides many different embodiments for implementing different aspects of some embodiments of the present invention. The specific elements and arrangements described below are only for simple and clear description of some embodiments of the present invention. Of course, these are only used as examples and are not limitations of the present invention. In addition, similar and / or corresponding element symbols may be used in different embodiments to indicate similar and / or corresponding elements to clearly describe the present invention. However, the use of these similar and / or corresponding element symbols is only for the simple and clear description of some embodiments of the present invention, and does not represent any correlation between the different embodiments and / or structures discussed.

[0062] It should be understood that relative terms, such as "lower" or "bottom" or "upper" or "top", may be used in various embodiments to describe the relative relationship of one element of the drawings to another element. It is understood that if the device in the drawings is turned upside down, the element described on the "lower" side will become the element on the "upper" side. The embodiments of the present invention may be used in conjunction with the attached drawings. Figure 1 It is to be understood that the drawings of the present invention are also considered as part of the disclosure.

[0063] Furthermore, when a first material layer is said to be located on or over a second material layer, it may include a situation where the first material layer is in direct contact with the second material layer, or the first material layer and the second material layer may not be in direct contact, that is, there may be one or more other material layers between the first material layer and the second material layer. However, if the first material layer is directly located on the second material layer, it means that the first material layer and the second material layer are in direct contact.

[0064] In addition, it should be understood that the ordinal numbers used in the specification and claims, such as "first", "second", etc., are used to modify the elements, and they are not intended to imply any previous ordinal numbers of the (or those) elements, nor do they represent the order of one element and another element, or the order of the manufacturing method. The use of these ordinal numbers is only used to make the element with a certain name clearly distinguishable from another element with the same name. The claims and the specification may not use the same words, for example, the first element in the specification may be the second element in the claims.

[0065] In some embodiments of the present invention, terms related to bonding and connection, such as "connect", "interconnect", "bond", etc., unless otherwise defined, may refer to two structures being in direct contact, or may also refer to two structures not being in direct contact, wherein another structure is disposed between the two structures. Such terms related to connection and bonding may also include situations where both structures are movable, or both structures are fixed. In addition, the terms "electrically connected" or "electrically coupled" include any direct and indirect electrical connection means.

[0066] In the text, the terms "approximate", "about", "substantially" usually mean within 10%, or within 5%, or within 3%, or within 2%, or within 1%, or within 0.5% of a given value or range. The quantity given here is an approximate quantity, that is, in the absence of a specific description of "about", "approximately", "substantially", the meaning of "about", "approximately", "substantially" can still be implied. The term "range is between a first value and a second value" or the term "first value~second value" means that the range includes the first value, the second value and other values ​​between them. Furthermore, there may be a certain error between any two values ​​or directions used for comparison. If the first value is equal to the second value, it implies that there may be an error of about 10%, or within 5%, or within 3%, or within 2%, or within 1%, or within 0.5% between the first value and the second value. If the first direction is perpendicular to the second direction, the angle between the first direction and the second direction may be between 80 and 100 degrees. If the first direction is parallel to the second direction, the angle between the first direction and the second direction may be between 0 and 10 degrees.

[0067] Certain words are used throughout the specification and claims of the present invention to refer to specific components. It should be understood by those of ordinary skill in the art that electronic equipment manufacturers may refer to the same components by different names. This document does not intend to distinguish between components that have the same function but different names. In the following specification and claims, words such as "comprise", "contain", "have" are open-ended words, and therefore should be interpreted as "including but not limited to..." Therefore, when the terms "comprise", "contain" and / or "have" are used in the description of the present invention, they specify the existence of corresponding parts, areas, steps, operations and / or elements, but do not exclude the existence of one or more corresponding parts, areas, steps, operations and / or elements.

[0068] It should be understood that the following embodiments may replace, reorganize, or combine components in different embodiments to complete other embodiments without departing from the spirit of the present invention. Components between embodiments may be used in any combination as long as they do not violate the spirit of the invention or conflict with each other.

[0069] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meanings as commonly understood by those of ordinary skill in the art. It is understood that these terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the background or context of the relevant technology and the present invention, and should not be interpreted in an idealized or overly formal manner unless specifically defined in the embodiments of the present invention.

[0070] In the present invention, each direction is not limited to three axes of a rectangular coordinate system such as the X-axis, the Y-axis, and the Z-axis, and can be interpreted in a broader sense. For example, the X-axis, the Y-axis, and the Z-axis may be perpendicular to each other, or may represent different directions that are not perpendicular to each other, but are not limited thereto. In some embodiments, the cross-sectional schematic diagram described herein is a cross-sectional schematic diagram for observing the XZ plane, and the top view schematic diagram described herein is a cross-sectional schematic diagram for observing the XY plane. In some embodiments, the term "a distance between an element and another element" represents that there is the distance between the center of an element and the center of another element, or represents that there is the distance between a boundary of an element and a boundary of another element. Among them, the center of the element may be the geometric center of the element.

[0071] In some embodiments, additional components may be added to the light-emitting device and display device of the present invention. In some embodiments, some components of the light-emitting device and display device of the present invention may be replaced or omitted. In some embodiments, additional operating steps may be provided before, during and / or after the manufacturing method of the light-emitting device and display device. In some embodiments, some of the operating steps described may be replaced or omitted, and the order of some of the operating steps described is interchangeable. In addition, it should be understood that some of the described steps may be replaced or deleted for other embodiments of the method. Furthermore, in the present invention, the number and size of each element in the accompanying drawings are for illustration only and are not intended to limit the scope of the present invention.

[0072] In some embodiments, the terms "color uniformity" and "brightness uniformity" may be based on the CIE 1931 or CIE 1976 chromaticity diagrams. In some embodiments, brightness may also represent luminance. In some embodiments, color uniformity may be measured by a color meter, and brightness uniformity may be measured using a luminance meter.

[0073] Reference Figure 1 , which shows a three-dimensional schematic diagram of the light emitting device 1 of the present invention according to some embodiments. In some embodiments, a substrate 10 having a conductive circuit is provided. In other embodiments, the substrate 10 may be a sapphire substrate, a silicon substrate, a glass substrate, a printed circuit board (PCB), a metal substrate, a ceramic substrate, the like, or a combination thereof, but the present invention is not limited thereto. In some embodiments, the substrate 10 may be a rigid substrate or a flexible substrate. In some embodiments, the substrate 10 may be a transparent substrate or an opaque substrate.

[0074] In some embodiments, a light emitting array 20 is formed on the substrate 10, and the light emitting array 20 may include a plurality of light emitting units, such as light emitting units U11, U12, U13, U21, U22, U23, U31, U32, and U33. In some embodiments, the number of light emitting units may be adjusted according to light emitting requirements. For ease of description, Figure 1 The following other drawings may show nine light-emitting units as an example, but the present invention is not limited thereto.

[0075] In some embodiments, each of the plurality of light-emitting units in the light-emitting array 20 includes an LED die and a packaging portion. In some embodiments, taking the light-emitting unit U11 as an example, the light-emitting unit U11 may include an LED die 22 and a packaging portion 24. In some embodiments, the LED die 22 may be disposed on the substrate 10. In some embodiments, the LED die 22 may be a blue light or UV light LED die. In some embodiments, the LED die 22 may use a smaller die, such as a sub-millimeter light-emitting diode (mini LED) die or a micro LED (micro LED) die, as required.

[0076] In some embodiments, the encapsulation portion 24 may be disposed on the substrate 10, and the encapsulation portion 24 may cover the LED die 22. In some embodiments, the encapsulation portion 24 may cover the top surface and the side surface of the LED die 22. In some embodiments, the encapsulation portion 24 may include an encapsulation matrix and an encapsulation wavelength conversion material (i.e., a fourth wavelength conversion material) dispersed in the encapsulation matrix. In some embodiments, the encapsulation matrix may include a transparent resin. For example, the encapsulation matrix may be an acrylic resin, an organic siloxane resin, an acrylate-modified polyurethane, an acrylate-modified organic silicone resin, an epoxy resin, the like, or a combination thereof, but the present invention is not limited thereto.

[0077] In some embodiments, the packaged wavelength conversion material may include a red light conversion material, a blue light conversion material, a green light conversion material, a yellow light conversion material, other suitable light conversion materials, or a combination thereof. In some embodiments, the red light conversion material may be a red quantum dot or a red phosphor, but the present invention is not limited thereto. For example, the red light conversion material may be (Sr, Ca)AlSiN3:Eu 2+ 、Ca2Si5N8:Eu 2+ 、Sr(LiAl3N4):Eu 2+ , manganese-doped red fluoride phosphor, or the like or a combination thereof, but the present invention is not limited thereto. The manganese-doped red fluoride phosphor may be K2GeF6:Mn 4+ 、K2SiF6:Mn 4+ 、K2TiF6:Mn 4+, its analogues or combinations thereof, but the present invention is not limited thereto. In some embodiments, the blue light conversion material may be a blue quantum dot or a blue phosphor, but the present invention is not limited thereto. In some embodiments, the green light conversion material may be a green quantum dot or a green phosphor, but the present invention is not limited thereto. For example, the green light conversion material may be a luminesin (LuAG) phosphor, a yttrium aluminum garnet (YAG) phosphor, a β-sialon (β-SiAlON) phosphor, a silicate phosphor, its analogues or combinations thereof, but the present invention is not limited thereto. In some embodiments, the yellow light conversion material may be a yellow quantum dot or a yellow phosphor. For example, the yellow light conversion material may be a yttrium aluminum garnet (YAG) phosphor. Taking the light-emitting unit emitting white light as an example, the LED die 22 may be a blue light LED die, and the encapsulation portion 24 may include a yellow light conversion material, or the encapsulation portion 24 may include a combination of a green light conversion material and a red light conversion material. For example, the encapsulation portion 24 may include a β-SiAlON phosphor and K2SiF6:Mn 4+ .

[0078] In some embodiments, the encapsulation portion 24 may further include diffusion particles dispersed in the encapsulation matrix. In some embodiments, the diffusion particles may include inorganic particles, organic polymer particles, or a combination thereof. For example, the inorganic particles may include silicon oxide, titanium oxide, aluminum oxide, calcium carbonate, barium sulfate, or any combination thereof, but the present invention is not limited thereto. For example, the organic polymer particles may include polymethyl methacrylate (PMMA), polystyrene (PS), acrylonitrile-butadiene-styrene copolymer (ABS), polyurethane (PU), or any combination thereof, but the present invention is not limited thereto.

[0079] In some embodiments, a plurality of first color conversion points 30 are provided on the substrate 10, and the plurality of first color conversion points 30 surround the light array 20 therein. For example, each of the plurality of first color conversion points 30 together surrounds the light array 20 within a space formed by the arrangement of the plurality of first color conversion points 30. In some embodiments, each of the plurality of first color conversion points 30 is disposed discontinuously, that is, each of the plurality of first color conversion points 30 does not contact each other. In some embodiments, one of the plurality of first color conversion points 30 is spaced a distance from another of the plurality of first color conversion points 30. Accordingly, the occupied area of ​​the first color conversion points 30 in the light-emitting device can be reduced, and the manufacturing cost can be reduced.

[0080] In some embodiments, the plurality of first color conversion points 30 may include a first matrix and a first wavelength conversion material dispersed in the first matrix. In some embodiments, the material of the first matrix of the first color conversion point 30 may be the same as or different from the packaging matrix of the packaging portion 24. In some embodiments, the first wavelength conversion material of the first color conversion point 30 may be the same as or different from the packaging wavelength conversion material of the packaging portion 24. When the first wavelength conversion material of the first color conversion point 30 is the same as the packaging wavelength conversion material of the packaging portion 24, the complexity and cost of the manufacturing process may be reduced, and the first color conversion point 30 and the packaging portion 24 may be formed in the same manufacturing process. Accordingly, since the first color conversion point 30 may include the first wavelength conversion material, the first color conversion point 30 may be used to compensate for the light emitted from the light emitting unit. For example, the light emitted from the light emitting unit may be secondary excited when it hits the first color conversion point 30. For example, the first color conversion point 30 may refract and / or scatter the light emitted from the light emitting unit.

[0081] In some embodiments, a plurality of light-guiding structures 40 are formed on the substrate 10 to guide the light emitted from the light-emitting unit through the light-guiding structures 40. For example, the light-guiding structure 40 can guide the light L21 emitted from the light-emitting unit U21, and the light-guiding structure 40 can guide the light L22 emitted from the light-emitting unit U22. Therefore, the light-guiding structure can avoid dark bands or strip defects generated between adjacent light-emitting units, thereby improving the color uniformity and / or brightness uniformity of the light-emitting device.

[0082] In some embodiments, Figure 1 As shown, each packaging portion 24 in the plurality of light emitting units has a height H e With bottom width W e , and the height H e Can be smaller than the bottom width W e In some embodiments, the height H e It can be 0.6 mm~0.85 mm, and the bottom width W e The height H of each packaging portion 24 may be 1.9 mm to 2.2 mm. e With bottom width W e The ratio (H e / W e ) can be 0.27~0.44. For example, the height H e With bottom width W e The ratio of can be 0.27, 0.3, 0.35, 0.4, 0.42, 0.44, or any value between the aforementioned values ​​or a numerical range consisting of any values, but the present invention is not limited thereto. In some embodiments, when the height He With bottom width W e When the ratio of H is less than 0.27, the angle of light of the light emitting unit is too small, thereby generating dark bands or strip defects around the light emitting unit, which reduces the color uniformity and / or brightness uniformity. e With bottom width W e When the ratio is greater than 0.44, the height H of the light-emitting unit e If the size is too large, the light emitting unit may have a conical shape, which may cause the color uniformity and / or brightness uniformity of the upper portion of the light emitting unit to decrease.

[0083] In some embodiments, each first color conversion point 30 has a first height H1 and a first bottom width W1, and the first height H1 may be smaller than the first bottom width W1. In some embodiments, the first height H1 may be 0.6 mm to 0.85 mm, and the first bottom width W1 may be 2.0 mm to 2.4 mm. When the first height H1 is smaller than 0.6 mm or the first bottom width W1 is smaller than 2.0 mm, the first color conversion point 30 cannot sufficiently compensate the light emitting unit. When the first height H1 is greater than 0.85 mm or the first bottom width W1 is greater than 2.4 mm, the first color conversion point 30 may also cause stripe defects or generate light spots with uneven brightness. In some embodiments, the ratio (H1 / W1) of the first height H1 to the first bottom width W1 of each first color conversion point 30 may be 0.25 to 0.43. For example, the ratio of the first height H1 to the first bottom width W1 may be 0.25, 0.27, 0.3, 0.35, 0.4, 0.43, or any value between the aforementioned values ​​or a numerical range consisting of any values, but the present invention is not limited thereto. In some embodiments, when the ratio of the first height H1 to the first bottom width W1 is less than 0.25, the light angle of the light emitted by the light emitting unit after irradiating the first color conversion point 30 and then emitting is too small, thereby generating a dark band or stripe defect around the first color conversion point 30, resulting in a decrease in color uniformity and / or brightness uniformity. In some embodiments, when the ratio of the first height H1 to the first bottom width W1 is greater than 0.43, the first color conversion point 30 is cone-shaped because the first height H1 of the first color conversion point 30 is too large, resulting in a decrease in color uniformity and / or brightness uniformity at the upper part of the first color conversion point 30.

[0084] In some embodiments, the bottom width W of the packaging portion 24 is e The first bottom width W1 may be smaller than the first bottom width W1 of the first color conversion point 30. In some embodiments, the first bottom width W1 and the bottom width W e The ratio (W1 / W e) can be 1-1.5. For example, the first bottom width W1 and the bottom width W e The ratio of H to H may be 1.3. In some embodiments, the height H of the packaging portion 24 e The first height H1 may be smaller than the first height H1 of the first color conversion point 30. In some embodiments, the first height H1 and the height H e The ratio (H1 / H e ) can be 1-1.5. For example, the first height H1 and the height H e The ratio of may be 1.2 to 1.3. Accordingly, since the size (eg, bottom width and thickness) of the first color conversion point 30 may be larger than the size of the packaging portion 24 of the light emitting unit, the first color conversion point 30 may compensate for the packaging portion 24 of the light emitting unit.

[0085] Reference Figure 2 , which shows a schematic top view of the light emitting device 1 of the present invention according to some embodiments. In some embodiments, the substrate 10 may be a square, a rectangle, a polygon, or a shape with arc edges. In some embodiments, the first direction D1 is the X-axis direction, and the second direction D2 is the Y-axis direction. In some embodiments, the substrate 10 may include two opposite first sides E1 and two opposite second sides E2. In some embodiments, the side of the substrate 10 along the first direction D1 is the first side E1, and the side of the substrate 10 along the second direction D2 is the second side E2. In some embodiments, the two first sides E1 intersect with the two second sides E2, and the plurality of first color conversion points 30 may be arranged along the two first sides E1 and the two second sides E2 of the substrate 10, so that the plurality of first color conversion points 30 may surround the light emitting array 20 within the plurality of first color conversion points 30. In some embodiments, the plurality of first color conversion points 30 are disposed between the light emitting array 20 and the first side E1 of the substrate, and the plurality of first color conversion points 30 are disposed between the light emitting array 20 and the second side E2 of the substrate. In other words, the first color conversion points 30 are disposed at the edge of the substrate 10.

[0086] In some embodiments, the substrate 10 may include a first region 10A and a second region 10B surrounding the first region 10A. In some embodiments, the first region 10A may have a rectangular or other shape, and the second region 10B may have a frame or other shape, but the present invention is not limited thereto. In some embodiments, the light emitting array 20 may be disposed in the first region 10A of the substrate 10, the light guide structure 40 may be disposed in the first region 10A of the substrate 10, and the plurality of first color conversion points 30 may be disposed in the second region 10B of the substrate 10.

[0087] In some embodiments, a plurality of light-emitting units of the light-emitting array 20 are arranged in an array along the first direction D1 and the second direction D2. In some embodiments, a minimum rectangle that can cover the light-emitting array 20 is framed, and the diagonals of the minimum rectangle are defined as the first diagonal DA1 and the second diagonal DA2. In some embodiments, the area of ​​the minimum rectangle that can cover the light-emitting array 20 may be the first area 10A of the substrate 10. In some embodiments, the first diagonal DA1 and the first direction D1 have an angle. In an embodiment where the minimum rectangle is a square, the angle may be 45 degrees, but the present invention is not limited thereto. In some embodiments, the second diagonal DA2 and the first direction D1 have an angle. In an embodiment where the minimum rectangle is a square, the angle may be 135 degrees, but the present invention is not limited thereto. In other embodiments, a minimum rectangle that can cover the light-emitting unit U22 is framed, and the diagonals of the minimum rectangle are defined as the first diagonal DA1 and the second diagonal DA2. In some other embodiments, a minimum rectangle that can cover the light-emitting units U12 , U13 , U22 , and U23 is framed, and the diagonals of the minimum rectangle are defined as a first diagonal line DA1 and a second diagonal line DA2 .

[0088] In some embodiments, a portion of the plurality of first color conversion points 30 may be arranged along the first direction D1, and another portion of the plurality of first color conversion points 30 may be arranged along the second direction D2. In some embodiments, in the extension direction of the first diagonal line DA1, each of the plurality of light emitting units is disposed between two first color conversion points of the plurality of first color conversion points 30. For example, the light emitting units U31, U22, or U13 are disposed as follows: Figure 2 In some embodiments, in the extension direction of the second diagonal line DA2, each of the plurality of light emitting units is disposed between two first color conversion points of the plurality of first color conversion points 30. For example, the light emitting units U11, U22 or U33 are disposed as follows: Figure 2 The first color conversion point 30 shown is located at the upper left corner and is between the first color conversion point 30 located at the lower right corner.

[0089] In some embodiments, in the extension direction of the first diagonal line DA1, each of the plurality of light guide structures 40 is disposed between two first color conversion points 30 of the plurality of first color conversion points 30. For example, the light guide structure 40 is disposed as follows: Figure 2 In some embodiments, in the extension direction of the second diagonal line DA2, each of the plurality of light guide structures 40 is disposed between two first color conversion points 30 of the plurality of first color conversion points 30. For example, the light guide structure 40 is disposed as follows: Figure 2 The first color conversion point 30 shown is located at the upper left corner and is between the first color conversion point 30 located at the lower right corner.

[0090] In some embodiments, each of the plurality of light-guiding structures 40 is disposed on a diagonal line between adjacent light-emitting units among the plurality of light-emitting units. In some embodiments, the light-guiding structure 40 is disposed at a center position of a first diagonal line DA1 between adjacent light-emitting units U22 and U13. In some embodiments, the light-guiding structure 40 is disposed at a center position of a second diagonal line DA2 between adjacent light-emitting units U22 and U11. In some embodiments, the center position may be a position at half the distance between adjacent light-emitting units. Accordingly, the light-guiding structure 40 may reduce the required number of light-emitting units, reduce the power consumption of the light-emitting device, reduce the cost of the light-emitting device, and / or make the light-emitting device thinner.

[0091] Reference Figure 3 , which shows the present invention according to some embodiments Figure 2 FIG. 1 is an enlarged top view of a partial area R of the light emitting device 1. In some embodiments, the light emitting unit U21 and the light emitting unit U22 have a distance p1, the light emitting unit U21 and the light emitting unit U11 have a distance p2, and the light emitting unit U21 and the light emitting unit U12 have a distance p3. Since the distances p1, p2, and p3 meet the requirements of p1 2 +p2 2 =p3 2 , so the distance p3 is greater than the distance p1, and the distance p3 is greater than the distance p2. Therefore, compared with the light emitted from the light-emitting unit U21 to the light-emitting unit U22 and the light-emitting unit U11, the color uniformity and / or brightness uniformity of the light emitted from the light-emitting unit U21 to the light-emitting unit U12 may be lower. Accordingly, the present invention improves the color uniformity and / or brightness uniformity of the light emitted from the light-emitting unit U21 by setting the light-guiding structure 40 at half the distance p3, but the present invention is not limited to this. The light-guiding structure 40 can improve the color uniformity and / or brightness uniformity of the light-emitting units adjacent to the light-guiding structure 40.

[0092] In some embodiments, the distance p1 may be the same as or different from the distance p2. In some embodiments, the distance p1 and / or the distance p2 may be 4 mm to 8 mm. For example, the distance p1 and / or the distance p2 may be 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, or any value between the aforementioned values ​​or a numerical range consisting of any values, but the present invention is not limited thereto. In some embodiments, the distance between the light-emitting unit U11 and the first color conversion point 30 is 1.5 mm to 3 mm. For example, the distance between the light-emitting unit U11 and the first color conversion point 30 may be 1.5 mm, 2 mm, 2.5 mm, 3 mm, or any value between the aforementioned values ​​or a numerical range consisting of any values, but the present invention is not limited thereto.

[0093] Reference Figure 4 , which shows a schematic top view of a light emitting device 1 of the present invention according to some embodiments. In some embodiments, as Figure 4 As shown, the light array 20 may include mxn light emitting units Umn, wherein m and n are positive integers. For example, the light emitting unit Umn is a light emitting unit located in the mth column and the nth row in the light array 20. For example, the light emitting unit U11 is a light emitting unit located in the 1st column and the 1st row in the light array 20, and the numbering method of the aforementioned other light emitting units U12, U13, U21, U22, U23, U31, U32 and U33 is the same as the numbering method of the light emitting unit U11. In this embodiment, (2m+2n) first color conversion points 30 are displayed, and (m-1) x (n-1) light guide structures 40 are displayed. In other words, the number of light emitting units, the first color conversion points 30 and / or the light guide structures 40 can be adjusted according to the use requirements.

[0094] Reference Figure 5 , which shows a cross-sectional schematic diagram of the light emitting device 1 of the present invention according to some embodiments. Figure 5 Display along Figure 4 . In some embodiments, the light emitting device 1 may further include a reflective layer 12. In some embodiments, the reflective layer 12 may be disposed on the substrate 10 to reflect light. In some embodiments, the die 22 may be disposed on the substrate 10, and a contact pad 23 of the die 22 may contact the top surface of the substrate 10. In some embodiments, the packaging portion 24 may be disposed on the reflective layer 12, and the packaging portion 24 may contact the die 22, the contact pad 23 and the substrate 10. In some embodiments, the reflective layer 12 may include a reflective material, such as white paint or other white materials, the like, or a combination thereof, but the present invention is not limited thereto.

[0095] In some embodiments, the light emitting device 1 may further include an optical layer 14. In some embodiments, the optical layer 14 is disposed on the light emitting array 20. In some embodiments, a distance p4 (i.e., optical distance (OD)) is provided between the bottom surface of the optical layer 14 and the top surface of the reflective layer 12. In some embodiments, the distance p4 may be between greater than or equal to 4 mm and less than or equal to 8 mm. For example, the distance p4 may be 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, or any value between the aforementioned values ​​or a numerical range consisting of any values, but the present invention is not limited thereto.

[0096] In some embodiments, the optical layer 14 may include a diffuser film 14A, a brightness enhancement film (BEF) 14B, and a dual brightness enhancement film (DBEF) 14C. In some embodiments, the diffuser film 14A may be disposed on the light emitting array 20, the brightness enhancement film 14B may be disposed on the diffuser film, and the dual brightness enhancement film 14C may be disposed on the brightness enhancement film 14B. In some embodiments, the optical layer 14 may include other suitable film layers.

[0097] In some embodiments, each light guide structure 40 has a fourth height H4 and a fourth bottom width W4, and the fourth height H4 may be less than the fourth bottom width W4. In some embodiments, the fourth height H4 may be 0.29 mm to 0.4 mm, and the fourth bottom width W4 may be 1.8 mm to 2.1 mm. In some embodiments, the ratio of the fourth height H4 to the fourth bottom width W4 of each light guide structure 40 (H4 / W4) may be 0.13 to 0.22. For example, the ratio of the fourth height H4 to the fourth bottom width W4 may be 0.13, 0.15, 0.18, 0.2, 0.22, or any value between the aforementioned values ​​or a numerical range consisting of any values, but the present invention is not limited thereto. In some embodiments, when the ratio of the fourth height H4 to the fourth bottom width W4 is less than 0.13, the light angle of the light emitted by the light-emitting unit after irradiating the light guide structure 40 is too small, thereby generating dark bands or strip defects around the light guide structure 40, resulting in a decrease in color uniformity and / or brightness uniformity. In some embodiments, when the ratio of the fourth height H4 to the fourth bottom width W4 is greater than 0.22, the shape of the light guide structure 40 is conical because the fourth height H4 of the light guide structure 40 is too large, resulting in a decrease in color uniformity and / or brightness uniformity of the upper part of the light guide structure 40.

[0098] In some embodiments, Figures 1 to 5 As shown, the light-guiding structure 40 may include a light-transmitting material. In some embodiments, the light-transmitting material may include an acrylic resin, an organic siloxane resin, an acrylate-modified polyurethane, an acrylate-modified silicone resin, an epoxy resin, a silica gel, the like, or a combination thereof, but the present invention is not limited thereto. In some embodiments, the silica gel may include a methyl group or a benzene ring. In some embodiments, the light-guiding structure 40 may substantially not include filling particles, but the present invention is not limited thereto. In some embodiments, the refractive index of the light-guiding structure 40 may be 1.4 to 1.6. In some embodiments, the light L21 emitted by the light-emitting unit U21 or the light L12 emitted by the light-emitting unit U12 may penetrate the light-guiding structure 40 that substantially does not include filling particles, and refract from the surface of the light-guiding structure 40. Accordingly, after the light L21 and L12 penetrate the light-guiding structure 40 and refract from the light-guiding structure 40, the light-guiding structure 40 may have a light angle of approximately 170 degrees.

[0099] Hereinafter, the same or similar reference numerals represent the same or similar elements, and repeated descriptions are omitted.

[0100] Reference Figure 6 and Figure 7 , which are respectively a top view schematic diagram and a cross-sectional schematic diagram showing a light emitting device 2 of the present invention according to some embodiments. Figure 7 Display along Figure 6 . In some embodiments, the light guide structure 42 in the light emitting device 2 may include a light-transmitting material and filler particles dispersed in the light-transmitting material. In some embodiments, the light-transmitting material of the light guide structure 42 may be the same as or different from the light-transmitting material of the light guide structure 40. In some embodiments, the filler particles of the light guide structure 42 may include titanium oxide (TiO2), boron nitride (BN), silicon oxide (SiO2), the like, or a combination thereof, but the present invention is not limited thereto.

[0101] In some embodiments, the volume of the filling particles accounts for 10% to 70% of the total volume of the light guide structure 42. In some embodiments, when the volume of the filling particles accounts for 10% to 30% of the total volume of the light guide structure 42, the light guide structure 42 may scatter the light emitted by the light emitting unit. In some embodiments, when the volume of the filling particles accounts for 30% to 50% of the total volume of the light guide structure 42, the light guide structure 42 may reflect the light emitted by the light emitting unit. In some embodiments, when the volume of the filling particles accounts for 50% to 70% of the total volume of the light guide structure 42, the light guide structure 42 may totally reflect the light emitted by the light emitting unit. In some embodiments, the refractive index of the light guide structure 42 may be 1.4 to 1.6. In some embodiments, the light L21 emitted by the light emitting unit U21 or the light L12 emitted by the light emitting unit U12 may be absorbed by the light guide structure 42 including the filling particles and scattered from the surface of the light guide structure 42. Accordingly, after the light L21 and L12 are absorbed by the light guide structure 42 and scattered from the light guide structure 42, the light guide structure 42 may have a light angle of approximately 170 degrees.

[0102] Reference Figure 8 and Fig. 9 , which are respectively a top view schematic diagram and a cross-sectional schematic diagram showing a light emitting device 3 of the present invention according to some embodiments. Fig. 9 Display along Figure 8 . In some embodiments, the light emitting device 3 may further include a plurality of second color conversion points 50. In some embodiments, a plurality of second color conversion points 50 are provided on the second region 10B of the substrate 10. In some embodiments, the plurality of second color conversion points 50 and the plurality of first color conversion points 30 jointly surround the light emitting array 20. In some embodiments, each of the plurality of second color conversion points 50 is disposed between adjacent first color conversion points 30 among the plurality of first color conversion points 30. For example, each of the plurality of second color conversion points 50 and each of the plurality of first color conversion points 30 are interlaced with each other, and jointly surround the light emitting array 20 and the light guide structure 40 within a space formed by arranging the plurality of second color conversion points 50 and the plurality of first color conversion points 30. In some embodiments, (2m+2n) second color conversion points 50 are displayed.

[0103] In some embodiments, the plurality of second color conversion dots 50 may include a second matrix and a second wavelength conversion material dispersed in the second matrix. In some embodiments, the material of the second matrix of the second color conversion dots 50 may be the same as or different from the packaging matrix of the packaging portion 24. In some embodiments, the second wavelength conversion material of the second color conversion dots 50 may be the same as or different from the packaging wavelength conversion material of the packaging portion 24. When the second wavelength conversion material of the second color conversion dots 50, the first wavelength conversion material of the first color conversion dots 30, and the packaging wavelength conversion material of the packaging portion 24 are the same, the complexity of the manufacturing process and the manufacturing process cost can be reduced, and the second color conversion dots 50, the first color conversion dots 30, and the packaging portion 24 can be formed in the same manufacturing process. Accordingly, the second color conversion dots 50 can be used to compensate for the light emitted from the light emitting unit.

[0104] In some embodiments, each second color conversion point 50 has a second height H2 and a second bottom width W2, and the second height H2 may be smaller than the second bottom width W2. In some embodiments, the second height H2 may be 0.4 mm to 0.6 mm, and the second bottom width W2 may be 1.8 mm to 2.0 mm. In some embodiments, the ratio of the second height H2 to the second bottom width W2 of each second color conversion point 50 (H2 / W2) may be 0.13 to 0.22. For example, the ratio of the second height H2 to the second bottom width W2 may be 0.13, 0.15, 0.18, 0.2, 0.22, or any value between the aforementioned values ​​or a numerical range consisting of any values, but the present invention is not limited thereto. In some embodiments, when the ratio of the second height H2 to the second bottom width W2 is less than 0.13, the light angle of the light emitted by the light emitting unit after irradiating the second color conversion point 50 is too small, thereby generating dark bands or stripe defects around the second color conversion point 50, resulting in a decrease in color uniformity and / or brightness uniformity. In some embodiments, when the ratio of the second height H2 to the second bottom width W2 is greater than 0.22, the second color conversion point 50 is conical in shape because the second height H2 of the second color conversion point 50 is too large, resulting in a decrease in color uniformity and / or brightness uniformity at the upper part of the second color conversion point 50.

[0105] In some embodiments, the second bottom width W2 of the second color conversion point 50 may be smaller than the bottom width W of the packaging portion 24. e In some embodiments, the second bottom width W2 is equal to the bottom width W e The ratio (W2 / W e ) can be 0.7-0.9. For example, the second bottom width W2 and the bottom width W e The ratio of may be 0.8. In some embodiments, the second height H2 of the second color conversion point 50 may be smaller than the height H of the encapsulation portion 24. eIn some embodiments, the second height H2 and the height H e The ratio (H2 / H e ) can be 0.7-0.9. For example, the second height H2 and the height H e The ratio can be 0.8.

[0106] Reference Fig.10 and Fig.11 , which are respectively a top view schematic diagram and a cross-sectional schematic diagram showing a light emitting device 4 of the present invention according to some embodiments. Fig.11 Display along Fig.10 A schematic cross-sectional view of the light emitting device 4 taken along line segment DD'.

[0107] In some embodiments, the light emitting device 4 may further include a plurality of third color conversion points 60. In some embodiments, a plurality of third color conversion points 60 are provided on the first region 10A of the substrate 10. In some embodiments, the plurality of third color conversion points 60 are respectively disposed between adjacent light emitting units among the plurality of light emitting units. In some embodiments, in the extension direction of the first diagonal line DA1, each of the plurality of third color conversion points 60 is disposed between two second color conversion points among the plurality of second color conversion points 50. In some embodiments, the plurality of second color conversion points 50 and the plurality of first color conversion points 30 jointly surround the plurality of third color conversion points 60. For example, each of the plurality of second color conversion points 50 and each of the plurality of first color conversion points 30 are interlaced with each other, and jointly surround the light emitting array 20, the light guide structure 40 and the plurality of third color conversion points 60 within a space formed by arranging the plurality of second color conversion points 50 and the plurality of first color conversion points 30. In some embodiments, (2m+2n-4) third color conversion points 60 are displayed, where m and n are positive integers greater than or equal to 3.

[0108] In some embodiments, the plurality of third color conversion dots 60 may include a third matrix and a third wavelength conversion material dispersed in the third matrix. In some embodiments, the material of the third matrix of the third color conversion dots 60 may be the same as or different from the packaging matrix of the packaging portion 24. In some embodiments, the third wavelength conversion material of the third color conversion dots 60 may be the same as or different from the packaging wavelength conversion material of the packaging portion 24. When the third wavelength conversion material of the third color conversion dots 60, the second wavelength conversion material of the second color conversion dots 50, and the first wavelength conversion material of the first color conversion dots 30 are the same as the packaging wavelength conversion material of the packaging portion 24, the complexity of the manufacturing process and the manufacturing process cost can be reduced, and the third color conversion dots 60, the second color conversion dots 50, the first color conversion dots 30, and the packaging portion 24 can be formed in the same manufacturing process. Accordingly, the third color conversion dots 60 can also be used to compensate for the light emitted from the light-emitting unit.

[0109] In some embodiments, each third color conversion point 60 has a third height H3 and a third bottom width W3, and the third height H3 may be smaller than the third bottom width W3. In some embodiments, the third height H3 may be 0.29 mm to 0.4 mm, and the third bottom width W3 may be 1.8 mm to 2.1 mm. In some embodiments, the ratio of the third height H3 to the third bottom width W3 of each third color conversion point 60 (H3 / W3) may be 0.13 to 0.22. For example, the ratio of the third height H3 to the third bottom width W3 may be 0.13, 0.15, 0.18, 0.2, 0.22, or any value between the aforementioned values ​​or a numerical range consisting of any values, but the present invention is not limited thereto. In some embodiments, when the ratio of the third height H3 to the third bottom width W3 is less than 0.13, the light angle of the light emitted by the light emitting unit after irradiating the third color conversion point 60 is too small, thereby generating dark bands or strip defects around the third color conversion point 60, resulting in a decrease in color uniformity and / or brightness uniformity. In some embodiments, when the ratio of the third height H3 to the third bottom width W3 is greater than 0.22, the third color conversion point 60 is conical in shape because the third height H3 of the third color conversion point 60 is too large, resulting in a decrease in color uniformity and / or brightness uniformity at the upper part of the third color conversion point 60.

[0110] In some embodiments, the third bottom width W3 of the third color conversion point 60 may be smaller than the bottom width W of the packaging portion 24. e In some embodiments, the third bottom width W3 and the bottom width W e The ratio (W3 / W e ) can be 0.6-0.8. For example, the third bottom width W3 and the bottom width W e The ratio of may be 0.7. In some embodiments, the third height H3 of the third color conversion point 60 may be smaller than the height H of the packaging portion 24. e In some embodiments, the third height H3 and the height H e The ratio (H3 / H e ) can be 0.5-0.8. For example, the third height H3 and the height H e The ratio can be 0.6~0.7.

[0111] In some embodiments, the above-mentioned optical elements, such as the first color conversion point 30, the second color conversion point 50, the third color conversion point 60, the light guide structure 40, 42 or a combination thereof, can improve the brightness uniformity of the light-emitting devices 1 to 4. For example, the brightness uniformity of the light-emitting devices 1 to 4 can be greater than or equal to 85%. For example, the brightness uniformity can be greater than 85%, 86%, 87%, 88%, 89%, 90%, 95% or higher. In some embodiments, when sampling nine light-emitting units, the ratio of the brightness of the light-emitting unit with the lowest brightness among the light-emitting units located at the periphery to the brightness of the light-emitting unit located at the center can be greater than or equal to 85%. For example, as shown in Figure 1 The light emitting device 1 shown is used as an example to illustrate that the ratio of the brightness (unit: nits) of the light emitting unit U22 to the brightness of the light emitting unit with the lowest brightness among the light emitting units U11, U12, U13, U21, U23, U31, U32 and U33 may be greater than or equal to 85%.

[0112] In some embodiments, different light-emitting devices may be selected according to the coordinates of the CIE chromaticity diagram. In the following, "before compensation" means that the light-emitting device is only provided with the light-guiding structure 40 without providing the color conversion point, for example, the light-emitting device 1'. In the following, the light-emitting device including the first color conversion point 30 and the light-guiding structure 40 (for example, the light-emitting devices 1 and 2) may be referred to as a type A light-emitting device, and the light-emitting device including the first color conversion point 30, the light-guiding structure 40 and the second color conversion point 50 (for example, the light-emitting devices 3 and 4) may be referred to as a type B light-emitting device.

[0113] In some embodiments, Figure 1 and Figure 2 As shown, nine light-emitting units are sampled and divided into a first zone, a second zone, and a third zone according to different rows to observe the color uniformity performance of the three areas, but the present invention is not limited thereto, and different columns may also be divided into the first zone, the second zone, and the third zone. Divided by rows, the first zone includes light-emitting units U11, U21, and U31, the second zone includes light-emitting units U12, U22, and U32, and the third zone includes light-emitting units U13, U23, and U33. The color uniformity calculation formula of the present invention can be referred to simultaneously in the following formulas (1), (2), and (3). In the first zone, the CIE coordinates of the light-emitting units U11, U21, and U31 are CIE(x 11 ,y 11 )、CIE(x 21 ,y 21 ) and CIE(x 31 ,y 31 In the second region, the CIE coordinates of the light-emitting units U12, U22 and U32 are CIE(x 12 ,y 12)、CIE(x 22 ,y 22 ) and CIE(x 32 ,y 32 In the third region, the CIE coordinates of the light-emitting units U13, U23 and U33 are CIE(x 13 ,y 13 )、CIE(x 23 ,y 23 ) and CIE(x 33 ,y 33 ). Taking the first zone as an example, the absolute value of the difference between the CIE maximum x-coordinate and the minimum x-coordinate of the three light-emitting units U11, U21 and U31 is defined as Δx1, and the absolute value of the difference between the CIE maximum y-coordinate and the minimum y-coordinate is defined as Δy1. The Δx1+Δy1 before compensation is compared with a compensation standard value. If the Δx1+Δy1 before compensation is greater than the compensation standard value, it means that the color uniformity of the first zone needs to be improved, and the light-emitting device can compensate by setting a color conversion point. If the Δx1+Δy1 after compensation is lower than the compensation standard value, it means that the color uniformity test has passed. The calculation method of Δx2+Δy2 in the second zone and Δx3+Δy3 in the third zone is similar to the calculation method of Δx1+Δy1 in the first zone.

[0114]

[0115] In the following, the compensation effect of the light emitting device 1 using type A is described with Tables 1 to 3. Table 1 shows the CIE coordinates of the light emitting unit of the light emitting device 1' without a color conversion point before compensation. Table 2 shows the CIE coordinates of the light emitting unit of the light emitting device 1 with a color conversion point 30 after compensation. Table 3 shows the data comparison of the color uniformity of the first to third areas of the light emitting device 1 before and after compensation. In other words, the light emitting device 1' can be regarded as the light emitting device 1 before compensation.

[0116] In some embodiments, the numerical range of Δx+Δy before compensation of the light-emitting array 20 is used to determine whether the color uniformity of the light-emitting device needs to be improved. In some embodiments, the compensation standard value is set to 0.015. If Δx+Δy before compensation is greater than 0.015, the color uniformity test is not passed, so the color uniformity of the light-emitting array needs to be improved. For example, the compensation standard value may be 0.014, 0.015, 0.016 or other suitable values. In some embodiments, the compensation ratio is ((Δx+Δy before compensation)-compensation standard value) / compensation standard value X 100%. For example, the compensation ratio of the first zone is (0.0178-0.015) / 0.015 X 100%=18.6%. Therefore, different types of light-emitting devices can be selected according to the compensation ratio to effectively compensate the light-emitting unit to improve the color uniformity of the light-emitting device.

[0117] Table 1 shows the CIE coordinates of the nine light-emitting units U11, U21, U31, U12, U22, U32, U13, U23 and U33 of the light-emitting device 1' before compensation.

[0118] Table 1

[0119]

[0120] Table 2 shows the compensated CIE coordinates of the nine light-emitting units U11 , U21 , U31 , U12 , U22 , U32 , U13 , U23 and U33 of the light-emitting device 1 having the first color conversion point 30 .

[0121] Table 2

[0122]

[0123] Table 3 shows the color uniformity data results of the light emitting device 1 of type A before and after compensation.

[0124] Table 3

[0125]

[0126] As shown in Table 3, take the compensation standard value of 0.015 as an example. Before compensation in the first zone, Δx+Δy is (0.2907-0.2836)+(0.2579-0.2472)=0.0178. The required compensation ratio is (0.0178-0.015) / 0.015 X 100%=18.6%. After compensation in the first zone, Δx+Δy is (0.2918-0.2876)+(0.2591-0.25)=0.0133.

[0127] The above Table 1 and the following Tables 4 and 5 are used to illustrate the compensation effect of the light emitting device 3 using type B. Table 4 shows the CIE coordinates of the light emitting unit of the light emitting device 3 having the first color conversion point 30 and the second color conversion point 50 after compensation. Table 5 shows the data comparison of the color uniformity of the first to third areas of the light emitting device 3 before and after compensation. In other words, the light emitting device 1' can be regarded as the light emitting device 3 before compensation.

[0128] Table 4 shows the compensated CIE coordinates of the nine light-emitting units U11 , U21 , U31 , U12 , U22 , U32 , U13 , U23 and U33 of the light-emitting device 3 having the first color conversion point 30 and the second color conversion point 50 .

[0129] Table 4

[0130]

[0131] Table 5 shows the color uniformity data results of the type B light emitting device 3 before and after compensation.

[0132] Table 5

[0133]

[0134] It can be seen from the data results in Table 3 and Table 5 that the light-emitting units in the first, second and third zones of the light-emitting devices of type A and type B all pass the color uniformity test, that is, the color uniformity performance is improved. Therefore, different types of light-emitting devices can be selected according to different compensation ratios to effectively compensate the light-emitting units and improve the color uniformity of the light-emitting devices.

[0135] Also, please refer to FIG. 12A to FIG. 12C , which are respectively schematic diagrams of brightness of the light-emitting device 1' with a colorless transition point, the light-emitting device 1 of type A, and the light-emitting device 3 of type B. FIG. 12A to FIG. 12C As shown, the edge brightness of the light emitting device 1', the light emitting device 1 and the light emitting device 3 in the third area are 1634 cd / m 2 、1685 cd / m 2 , 1799 cd / m 2 . In some embodiments, the brightness improvement percentage is ((brightness after compensation - brightness before compensation) / brightness before compensation x 100%). Compared with the light-emitting device 1' with a colorless conversion point, the edge brightness improvement of the third zone of the light-emitting device 1 of type A can be greater than 3% ((1685-1634) / 1634X100%= 3.1%). Compared with the light-emitting device with a colorless conversion point, the edge brightness improvement of the third zone of the light-emitting device 1 of type B can be greater than 10% ((1799-1634) / 1634X100%= 10.1%). It can be seen from this that the light-emitting device containing a color conversion point of the present invention can also improve the brightness of the edge area of ​​the substrate, which will facilitate the splicing of multiple light-emitting devices.

[0136] The light emitting device of the present invention can be applied to the backlight of a display device, for example, as a white light backlight source provided to a liquid crystal display device. In addition, the light emitting device can be spliced ​​to increase the area of ​​the light emitting device to meet the needs of a large-sized display device, and can solve the problem of insufficient color uniformity or insufficient brightness at the traditional splicing gap. Fig.13 , which shows a schematic top view of a display device 5 of the present invention according to some embodiments. In some embodiments, the display device 5 may include one or more light-emitting devices 1, 2, 3, and 4. In some embodiments, the display device 5 may include p light-emitting devices 1, 2, 3, and 4, where p is a positive integer. For ease of description, Fig.13The example in which the display device 5 includes two light emitting devices 4 is shown, but the present invention is not limited thereto. In some embodiments, since the light emitting device 4 can avoid dark bands or strip defects between adjacent light emitting units and / or avoid the problem of insufficient color uniformity or insufficient brightness at the edge of the light emitting array or the edge of the adjacent substrate, the color uniformity and / or brightness uniformity at the joint gap between the two light emitting devices 4 are also improved.

[0137] In summary, according to some embodiments of the present invention, the present invention improves the optical characteristics of the light-emitting device and the display device by setting specific optical elements, such as: a first color conversion point, a second color conversion point, a third color conversion point, a light-guiding structure or a combination thereof. For example, the present invention can avoid dark bands or strip defects generated between adjacent light-emitting units, thereby improving the color uniformity and / or brightness uniformity of the light-emitting device and the display device. For example, the present invention can avoid the problem of insufficient color uniformity or insufficient brightness uniformity at the edge of the light-emitting array, the diagonal of the light-emitting unit, and / or the edge of the adjacent substrate, thereby improving the color uniformity and / or brightness uniformity of the light-emitting device and the display device.

[0138] As long as the components between the embodiments of the present invention do not violate the spirit of the invention or conflict with each other, they can be mixed and matched for use at will. In addition, the scope of protection of the present invention is not limited to the manufacturing process, machine, manufacture, material composition, device, method and steps in the specific embodiment described in the specification. Any ordinary technician in the relevant technical field can understand the current or future developed manufacturing process, machine, manufacture, material composition, device, method and steps from the disclosure of the present invention. As long as substantially the same function can be implemented in the embodiments described herein or substantially the same result can be obtained, they can be used according to the present invention. Therefore, the scope of protection of the present invention includes the aforementioned manufacturing process, machine, manufacture, material composition, device, method and steps. Any embodiment or claim of the present invention is not required to achieve all the purposes, advantages and / or features disclosed by the present invention.

[0139] Several embodiments are summarized above so that those skilled in the art can better understand the concepts of the embodiments of the present invention. Those skilled in the art should understand that they can design or modify other manufacturing processes and structures based on the embodiments of the present invention to achieve the same purposes and / or advantages as the embodiments introduced herein. Those skilled in the art should also understand that such equivalent manufacturing processes and structures do not deviate from the spirit and scope of the present invention, and they can make various changes, substitutions and replacements without violating the spirit and scope of the present invention.

Claims

1. A light emitting device, comprising: substrate; The light emitting array is disposed on the substrate and includes a plurality of light emitting units, wherein each of the plurality of light emitting units includes: LED chips are disposed on the substrate; and A packaging portion, disposed on the substrate and covering the LED die; and A plurality of first color conversion points are disposed on the substrate and surround the light emitting array, wherein the plurality of first color conversion points include a first wavelength conversion material.

2. The light-emitting device as described in claim 1, wherein each of the packaging parts has a height and a bottom width, the height is smaller than the bottom width, each of the first color conversion points has a first height and a first bottom width, the first height is smaller than the first bottom width, and the bottom width is smaller than the first bottom width, and the height is smaller than the first height. 3 . The light emitting device as claimed in claim 2 , wherein a ratio of the height of each packaging portion to the bottom width is 0.27-0.44, and a ratio of the first height of each first color conversion point to the first bottom width is 0.25-0.

43.

4. The light emitting device according to claim 2, further comprising: A plurality of second color conversion dots are disposed on the substrate and surround the light emitting array together with the plurality of first color conversion dots, wherein each of the plurality of second color conversion dots is disposed between adjacent first color conversion dots among the plurality of first color conversion dots, and the plurality of second color conversion dots include a second wavelength conversion material.

5. The light emitting device as claimed in claim 4, wherein each of the second color conversion points has a second height and a second bottom width, the second height is smaller than the second bottom width, and the second height of the second color conversion point is smaller than the height of the packaging portion, and the second bottom width of the second color conversion point is smaller than the bottom width of the packaging portion. 6 . The light emitting device as claimed in claim 5 , wherein a ratio of the second height H2 to the second bottom width W2 of each second color conversion point is 0.13-0.

22.

7. The light emitting device according to claim 4, further comprising: A plurality of third color conversion points are disposed on the substrate and respectively disposed between adjacent light emitting units among the plurality of light emitting units, wherein the plurality of first color conversion points and the second color conversion points together surround the plurality of third color conversion points, and the plurality of third color conversion points include a third wavelength conversion material.

8. The light-emitting device as claimed in claim 7, wherein each of the third color conversion points has a third height and a third bottom width, and the third height is smaller than the third bottom width, and the third height of the third color conversion point is smaller than the height of the packaging portion, and the third bottom width of the third color conversion point is smaller than the bottom width of the packaging portion, wherein the ratio of the third height of each of the third color conversion points to the third bottom width is 0.13-0.

22. 9 . The light emitting device as claimed in claim 1 , wherein each of the packaging parts comprises a fourth wavelength conversion material.

10. The light emitting device according to claim 1, further comprising: A plurality of light guide structures are disposed on the substrate, and each of the plurality of light guide structures is disposed on a diagonal line between adjacent light emitting units among the plurality of light emitting units. The light emitting device as claimed in claim 10 , wherein each of the plurality of light guide structures is disposed at a center position of the diagonal line. The light emitting device as claimed in claim 10 , wherein the plurality of light guide structures comprise a light-transmitting material. 13 . The light emitting device as claimed in claim 12 , wherein the plurality of light guide structures further comprise filling particles dispersed in the light transmissive material. 14 . The light-emitting device as claimed in claim 13 , wherein the volume of the filling particles accounts for 10% to 70% of the total volume of the light-guiding structure.

15. The light emitting device as claimed in claim 1, wherein the substrate comprises two opposite first sides and two opposite second sides, the first sides intersect with the second sides, and the plurality of first color conversion points are arranged along the first sides and the second sides of the substrate to surround the light emitting array.

16. A display device comprising the light emitting device according to any one of claims 1 to 15.

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