Light emitting diode, light emitting substrate and display device

Abstract

The present application discloses a light-emitting diode, a light-emitting substrate, and a display device. The light-emitting diode includes a first semiconductor layer, a light-emitting layer, a second semiconductor layer, and a first protective layer; the light-emitting layer is arranged on the first semiconductor layer; the second semiconductor layer is arranged on the side of the light-emitting layer away from the first semiconductor layer, and is located on the light-emitting surface of the light-emitting layer; the first protective layer is arranged on the side of the second semiconductor layer away from the light-emitting layer; the light-emitting diode includes at least one diffusion surface, and at least one diffusion surface includes the surface of the second semiconductor layer away from the light-emitting layer and / or the surface of the first protective layer away from the second semiconductor layer; wherein the diffusion surface includes a central curved surface and an edge curved surface connected to the central curved surface, the central curved surface is concave toward the light-emitting layer, and the edge curved surface is convex toward the light-emitting layer. The present application provides a light-emitting diode capable of emitting light at a wide angle.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a light emitting diode, a light emitting substrate and a display device. Background Art

[0002] In addition to being used in direct display products, Mini LED (Mini Light-Emitting Diode) display technology can also be used in Mini LED backlight products. When Mini LED display technology is applied to backlight products and equipped with liquid crystal displays (LCD), it can create high-end display products that can achieve backlight partition control and have a contrast close to that of organic light-emitting diode (Organic Light-Emitting Diode, OLED) displays.

[0003] Unlike the backlight products in traditional LCDs, MiniLED display technology can make the backlight beads very small, so that more backlight beads can be integrated on the same screen, thus dividing it into more fine backlight partitions to improve the contrast of the backlight products and improve the backlight taste.

[0004] However, the existing LED has a small light-emitting angle. Under the condition of ensuring the same backlight quality, more LEDs are required, which is costly. Therefore, providing an LED capable of emitting light at a wide angle to reduce the production cost of backlight products has become a technical problem to be solved urgently. Summary of the invention

[0005] The present application provides a light emitting diode, a light emitting substrate and a display device. By providing a light emitting diode capable of emitting light at a wide angle, the number of LEDs in a backlight product can be reduced while ensuring the same backlight quality, thereby reducing the production cost of the backlight product.

[0006] The present invention provides a light emitting diode, which includes:

[0007] a first semiconductor layer;

[0008] A light emitting layer is disposed on the first semiconductor layer;

[0009] A second semiconductor layer is disposed on a side of the light emitting layer away from the first semiconductor layer and located on a light emitting surface of the light emitting layer; and

[0010] A first protective layer is disposed on a side of the second semiconductor layer away from the light emitting layer;

[0011] The light-emitting diode includes at least one diffusion surface, and the at least one diffusion surface includes a surface of the second semiconductor layer away from the light-emitting layer and / or a surface of the first protective layer away from the second semiconductor layer; wherein the diffusion surface includes a central curved surface and an edge curved surface connected to the central curved surface, the central curved surface is concave toward the light-emitting layer, and the edge curved surface is convex toward the light-emitting layer.

[0012] Optionally, in some embodiments of the present application, the central curved surface covers the center of the light-emitting layer.

[0013] Optionally, in some embodiments of the present application, a surface of the second semiconductor layer away from the light-emitting layer is a first diffusion surface, the first diffusion surface includes a first central curved surface and a first edge curved surface connected to the first central curved surface, the first central curved surface is concave toward the light-emitting layer, and the first edge curved surface is convex toward the light-emitting layer;

[0014] The second semiconductor layer further includes a first bottom surface, wherein the first bottom surface is in contact with the light emitting surface of the light emitting layer and is connected to the first edge curved surface.

[0015] Optionally, in some embodiments of the present application, the surface of the first protective layer away from the second semiconductor layer is a second diffusion surface, the second diffusion surface includes a second central curved surface and a second edge curved surface connected to the second central curved surface, the second central curved surface is concave toward the light-emitting layer, and the second edge curved surface is convex toward the light-emitting layer;

[0016] The first protection layer also includes a second bottom surface, wherein the second bottom surface is in contact with the first diffusion surface and connected to the second edge curved surface.

[0017] The embodiment of the present application provides a light-emitting substrate, which includes a substrate and a light-emitting diode arranged on the substrate, wherein the light-emitting diode includes:

[0018] a first semiconductor layer;

[0019] A light emitting layer is disposed on the first semiconductor layer;

[0020] A second semiconductor layer is disposed on a side of the light emitting layer away from the first semiconductor layer and located on a light emitting surface of the light emitting layer; and

[0021] A first protective layer is disposed on a side of the second semiconductor layer away from the light emitting layer;

[0022] The light-emitting diode includes at least one diffusion surface, and the at least one diffusion surface includes a surface of the second semiconductor layer away from the light-emitting layer and / or a surface of the first protective layer away from the second semiconductor layer; wherein the diffusion surface includes a central curved surface and an edge curved surface connected to the central curved surface, the central curved surface is concave toward the light-emitting layer, and the edge curved surface is convex toward the light-emitting layer.

[0023] Optionally, in some embodiments of the present application, the light-emitting substrate further includes a packaging layer covering the light-emitting diode, and a recessed portion concave toward the light-emitting diode is formed on a side of the packaging layer away from the base.

[0024] Optionally, in some embodiments of the present application, the encapsulation layer includes a plurality of encapsulation parts, each of the encapsulation parts includes the recessed part covering the center of the light-emitting diode, the surface of the recessed part away from the light-emitting diode includes a diverging surface concave toward the light-emitting diode, and the diverging surface convexes from the base toward the light-emitting diode.

[0025] Optionally, in some embodiments of the present application, the encapsulation layer covers the upper surface of the light-emitting diode and fills the area between adjacent light-emitting diodes, and the recessed portion covers the center of the light-emitting diode; the surface of the encapsulation layer away from the light-emitting diode is wavy.

[0026] Optionally, in some embodiments of the present application, the light-emitting substrate also includes a lamp holder arranged on the base, the lamp holder includes a bottom surface, a first surface and a second surface respectively connected to the bottom surface, the bottom surface is in contact with the surface of the base, the angle formed by the first surface and the bottom surface, and the angle formed by the second surface and the bottom surface are both acute angles, and at least one light-emitting diode is arranged on the first surface and the second surface.

[0027] Optionally, in some embodiments of the present application, the angle formed by the first surface and the bottom surface is equal to the angle formed by the second surface and the bottom surface.

[0028] Optionally, in some embodiments of the present application, the lamp holder further includes a third surface, the third surface is connected between the first surface and the second surface, the third surface is parallel to the bottom surface, and at least one light emitting diode is arranged on the third surface.

[0029] Optionally, in some embodiments of the present application, the lamp holder extends from one end of the base to the other end of the base, a plurality of the light-emitting diodes are arranged on the first surface and the second surface, and the light-emitting diodes on the first surface and the light-emitting diodes on the second surface are symmetrical.

[0030] An embodiment of the present application further provides a display device, which includes a liquid crystal display panel and a light-emitting substrate arranged on one side of the liquid crystal display panel, and the light-emitting substrate is the light-emitting substrate described in any of the aforementioned embodiments.

[0031] Compared with the light-emitting diode in the prior art, the present application sets at least one diffusion surface in the light-emitting diode. Since the diffusion surface includes a central curved surface and an edge curved surface connected to the central curved surface, the central curved surface is concave toward the light-emitting layer, and the edge curved surface is convex toward the light-emitting layer. When the light emitted by the light-emitting layer enters the central curved surface and the edge curved surface in the diffusion surface, the emission angle of the light emitted from the central curved surface and the edge curved surface will increase, thereby increasing the light-emitting viewing angle of the light-emitting diode, thereby providing a light-emitting diode capable of wide-angle light emission. When the above-mentioned light-emitting diode capable of wide-angle light emission is applied to a backlight product, the present application can reduce the number of light-emitting diodes in the backlight product while ensuring the same backlight quality, thereby reducing the production cost of the backlight product. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. The drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 It is a schematic diagram of the structure of the light emitting diode provided in this application.

[0034] Figure 2 It is a schematic structural diagram of the light-emitting substrate provided in the first embodiment of the present application.

[0035] Figure 3 It is a schematic structural diagram of a light-emitting substrate provided in the second embodiment of the present application.

[0036] Figure 4 It is a schematic diagram of the light path structure in the light-emitting substrate provided in the second embodiment of the present application.

[0037] Figure 5 It is a schematic structural diagram of a light-emitting substrate provided in the third embodiment of the present application.

[0038] Figure 6 It is a schematic diagram of the structure of the light-emitting substrate provided in the fourth embodiment of the present application.

[0039] Figure 7 It is a schematic diagram of the planar structure of the light-emitting substrate provided in the fourth embodiment of the present application.

[0040] Figure 8 yes Figure 7A schematic diagram of the three-dimensional structure of the lamp holder is shown.

[0041] Fig. 9 It is a schematic diagram of the structure of the light-emitting substrate provided in the fifth embodiment of the present application.

[0042] Fig.10 It is a schematic diagram of the planar structure of the light-emitting substrate provided in the fifth embodiment of the present application.

[0043] Fig.11 It is a schematic structural diagram of a light-emitting substrate provided in the sixth embodiment of the present application.

[0044] Fig.12 yes Fig.11 A schematic diagram of the three-dimensional structure of the lamp holder is shown.

[0045] Fig.13 It is a schematic diagram of the structure of the display device provided in this application. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the directional words such as "upper" and "lower" used generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0047] The present application provides a light emitting diode, a light emitting substrate and a display device. The following are detailed descriptions of each. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.

[0048] The present application provides a light-emitting diode. The light-emitting diode comprises a first semiconductor layer, a light-emitting layer, a second semiconductor layer, and a first protective layer; the light-emitting layer is arranged on the first semiconductor layer; the second semiconductor layer is arranged on a side of the light-emitting layer away from the first semiconductor layer and is located on a light-emitting surface of the light-emitting layer; the first protective layer is arranged on a side of the second semiconductor layer away from the light-emitting layer; the light-emitting diode comprises at least one diffusion surface, and the at least one diffusion surface comprises a surface of the second semiconductor layer away from the light-emitting layer and / or a surface of the first protective layer away from the second semiconductor layer; wherein the diffusion surface comprises a central curved surface and an edge curved surface connected to the central curved surface, the central curved surface is concave toward the light-emitting layer, and the edge curved surface is convex toward the light-emitting layer.

[0049] Therefore, the present application sets at least one diffusion surface in the light-emitting diode. Since the diffusion surface includes a central curved surface and an edge curved surface connected to the central curved surface, the central curved surface is concave toward the light-emitting layer, and the edge curved surface is convex toward the light-emitting layer. When the light emitted by the light-emitting layer enters the central curved surface and the edge curved surface in the diffusion surface, the emission angle of the light emitted from the central curved surface and the edge curved surface will increase, thereby increasing the light-emitting viewing angle of the light-emitting diode, thereby providing a light-emitting diode capable of wide-angle light emission. When the above-mentioned light-emitting diode capable of wide-angle light emission is applied to a backlight product, the present application can reduce the number of light-emitting diodes in the backlight product while ensuring the same backlight quality, thereby reducing the production cost of the backlight product.

[0050] The light emitting diode provided in the present application is described in detail below through specific embodiments.

[0051] Please refer to Figure 1 The first example of the present application provides a light emitting diode 10. The light emitting diode 10 includes a substrate 1, a buffer layer 2, a first semiconductor layer 3, a light emitting layer 4, a second semiconductor layer 5, a first protective layer 6, a second protective layer 7, a first electrode 8 and a second electrode 9.

[0052] Specifically, the substrate 1 may be a sapphire substrate, a gallium arsenide substrate or a silicon-based substrate. In this embodiment, the substrate 1 is a sapphire substrate.

[0053] The buffer layer 2 is disposed on one side of the substrate 1. The material of the buffer layer 2 may include gallium nitride.

[0054] The first semiconductor layer 3 is disposed on a side of the buffer layer 2 away from the substrate 1. In this embodiment, the first semiconductor layer 3 is an N-type semiconductor layer, and the material of the N-type semiconductor layer includes N-type gallium nitride.

[0055] The light emitting layer 4 is arranged on a side of the first semiconductor layer 3 away from the buffer layer 2. The light emitting layer 4 includes a light emitting surface. The light emitting layer 4 is a multi-quantum well structure, and the multi-quantum well structure may include a stacked structure of a gallium nitride layer (not shown in the figure) and a gallium indium nitride layer (not shown in the figure).

[0056] The second semiconductor layer 5 is arranged on the side of the light emitting layer 4 away from the first semiconductor layer 3. The second semiconductor layer 5 is located on the light emitting surface of the light emitting layer 4. The second semiconductor layer 5 has a structure with a concave center and convex edges. In this embodiment, the second semiconductor layer 5 is a P-type semiconductor layer, and the material of the P-type semiconductor layer includes P-type gallium nitride.

[0057] The first protective layer 6 is arranged on the side of the second semiconductor layer 5 away from the light emitting layer 4. The first protective layer 6 is a structure with a concave center and a convex edge. The refractive index of the first protective layer 6 is less than the refractive index of the second semiconductor layer 5 and greater than the refractive index of air. The material of the first protective layer 6 may include one or more of silicon oxide, silicon nitride and silicon oxynitride.

[0058] In this embodiment, the light emitting diode 10 includes at least one diffusion surface. The at least one diffusion surface includes a surface of the second semiconductor layer 5 away from the light emitting layer 4 and a surface of the first protective layer 6 away from the second semiconductor layer 5. The diffusion surface includes a central curved surface and an edge curved surface connected to the central curved surface. The edge curved surface is located on the peripheral side of the central curved surface. The central curved surface is concave toward the light emitting layer 4. The edge curved surface is convex toward the light emitting layer 4.

[0059] Among them, at least one diffusion surface includes a first diffusion surface 51 and a second diffusion surface 61. The surface of the second semiconductor layer 5 away from the light emitting layer 4 is the first diffusion surface 51. The surface of the first protective layer 6 away from the second semiconductor layer 5 is the second diffusion surface 61. It should be noted that, in some embodiments, the light emitting diode 10 may also include only one of the first diffusion surface 51 and the second diffusion surface 61. In this case, the diffusion surface is the surface of the second semiconductor layer 5 away from the light emitting layer 4 or the surface of the first protective layer 6 away from the second semiconductor layer 5, which will not be repeated here.

[0060] Specifically, the first diffusion surface 51 includes a first central curved surface 511 and a first edge curved surface 512 connected to the first central curved surface 511. The first edge curved surface 512 is located on the peripheral side of the first central curved surface 511. The first central curved surface 511 is concave toward the light-emitting layer 4. The first edge curved surface 512 is convex toward the light-emitting layer 4. Through the above arrangement, when the light emitted from the center of the light-emitting layer 4 enters the first central curved surface 511 and the first edge curved surface 512, the incident light will diffuse in a direction away from the center of the light-emitting layer 4, thereby increasing the light emission angle, so that the light-emitting diode 10 can achieve wide-angle light emission.

[0061] In this embodiment, the first central curved surface 511 covers the center of the light emitting layer 4 . This arrangement enables the outgoing light from the center of the light emitting layer 4 to enter the first central curved surface 511 , thereby increasing the viewing angle of the center of the light emitting layer 4 .

[0062] Furthermore, the second semiconductor layer 5 further includes a first bottom surface 52 , wherein the first bottom surface 52 is in contact with the light emitting surface of the light emitting layer 4 , and is connected to the first edge curved surface 512 .

[0063] When the light emitted from the center of the light-emitting layer 4 enters the first central curved surface 511 and the first edge curved surface 512, the incident light will diffuse on the first central curved surface 511 and the first edge curved surface 512 in a direction away from the center of the light-emitting layer 4. Specifically, a portion of the incident light will be refracted on the first central curved surface 511, and the angle of the refracted light will increase, thereby increasing the light-emitting viewing angle of the front side of the light-emitting diode 10; another portion of the incident light will be reflected on the front side of the first central curved surface 511 and the first edge curved surface 512 and emitted to the side of the first edge curved surface 512, and the reflected light emitted to the side of the first edge curved surface 512 will be refracted, so that the angle of the refracted light emitted from the side of the first edge curved surface 512 increases, thereby increasing the light-emitting viewing angle of the side of the light-emitting diode 10. Therefore, this embodiment provides a light-emitting diode 10 capable of emitting light at a wide angle.

[0064] Specifically, the second diffusion surface 61 includes a second central curved surface 611 and a second edge curved surface 612 connected to the second central curved surface 611. The second edge curved surface 612 is located on the circumference of the second central curved surface 611. The second central curved surface 611 is concave toward the light-emitting layer 4. The second edge curved surface 612 is convex toward the light-emitting layer 4. Through the above arrangement, when the light emitted from the first diffusion surface 51 enters the second central curved surface 611 and the second edge curved surface 612, the incident light will diffuse in a direction away from the center of the light-emitting layer 4, thereby further increasing the light emission angle.

[0065] In this embodiment, the second central curved surface 611 covers the center of the light-emitting layer 4 . This arrangement allows the outgoing light from the center of the light-emitting layer 4 to be emitted from the first central curved surface 511 and then enter the second central curved surface 611 , thereby further increasing the viewing angle of the center of the light-emitting layer 4 .

[0066] Furthermore, the first protection layer 6 further includes a second bottom surface 62 , wherein the second bottom surface 62 is in contact with the first diffusion surface 51 and connected to the second edge curved surface 612 .

[0067] When the light emitted from the center of the light-emitting layer 4 is emitted from the first center curved surface 511 and the first edge curved surface 512 and then enters the second center curved surface 611 and the second edge curved surface 612, the incident light will diffuse on the second center curved surface 611 and the second edge curved surface 612 in a direction away from the center of the light-emitting layer 4. Specifically, a part of the incident light will be refracted on the second center curved surface 611, and the angle of the refracted light will increase, thereby further increasing the light-emitting viewing angle of the front side of the light-emitting diode 10; another part of the refracted light will be reflected on the front side of the second center curved surface 611 and the second edge curved surface 612 and emitted to the side of the second edge curved surface 612, and the reflected light emitted to the side of the second edge curved surface 612 will be refracted, so that the angle of the refracted light emitted from the side of the second edge curved surface 612 increases, thereby further increasing the light-emitting viewing angle of the side of the light-emitting diode 10, thereby increasing the overall light-emitting viewing angle of the light-emitting diode 10.

[0068] The second protective layer 7 is arranged on a side of the first semiconductor layer 3 away from the buffer layer 2 and adjacent to the light emitting layer 4. The thickness of the second protective layer 7 is less than the thickness of the light emitting layer 4. Specifically, the second protective layer 7 is in the same layer as the light emitting layer 4, and the side of the second protective layer 7 is in contact with the side of the light emitting layer 4. The second protective layer 7 can be made by the same process as the first protective layer 6, and the material of the second protective layer 7 can include one or more of silicon oxide, silicon nitride and silicon oxynitride.

[0069] The first electrode 8 is arranged on the side of the first protective layer 6 away from the second semiconductor layer 5, and the first electrode 8 can be a P-type electrode. The second electrode 9 is arranged on the side of the second protective layer 7 away from the first semiconductor layer 3, and the second electrode 9 can be an N-type electrode. It should be noted that the first electrode 8 can be arranged on the second edge curved surface 612 or on the second center curved surface 611. This application only illustrates the structure when the first electrode 8 is arranged on the second edge curved surface 612, but it cannot be understood as a limitation to this application.

[0070] Please refer to Figure 2 The first embodiment of the present application provides a light emitting substrate 100. The light emitting substrate 100 includes a substrate 20 and a light emitting diode 10 disposed on the substrate 20.

[0071] The substrate 20 may be a driving substrate, which may be a PCB-based driving substrate or a glass-based driving substrate. In addition, the structure of the light-emitting diode 10 is the same as that of the light-emitting diode 10 in the aforementioned example 1. The specific structure of the light-emitting diode 10 may refer to the description of the aforementioned example 1, which will not be described in detail here.

[0072] It should be noted that the light-emitting substrate 100 provided in this embodiment can be applied to LCD as a backlight product, and can also be used as a direct display product. This embodiment only uses the light-emitting substrate 100 as a backlight product as an example for explanation, but it cannot be understood as a limitation of this application.

[0073] The light-emitting substrate 100 provided in this embodiment uses the light-emitting diodes 10 capable of emitting light at a wide angle, and can reduce the number of light-emitting diodes 10 used in the light-emitting substrate 100 while ensuring the same backlight quality, thereby reducing the production cost of the backlight product. In addition, while ensuring the same number of light-emitting diodes 10 in the light-emitting substrate 100, this embodiment can improve the backlight quality to increase the contrast of the display product.

[0074] Please refer to Figure 3 and Figure 4 The second embodiment of the present application provides a light-emitting substrate 100. The light-emitting substrate 100 provided in the second embodiment of the present application is different from that in the first embodiment in that the light-emitting substrate 100 further includes an encapsulation layer 30 covering the light-emitting diode 10. A recessed portion 30A is formed on a side of the encapsulation layer 30 away from the substrate 20 and is concave toward the light-emitting diode 10.

[0075] In this embodiment, the encapsulation layer 30 includes a plurality of encapsulation parts 31. The material of the encapsulation parts 31 may include one or more of epoxy resin, acrylic resin and silicone.

[0076] Each packaging portion 31 includes a recessed portion 30A covering the center of a light emitting diode 10. The surface of the recessed portion 30A away from the light emitting diode 10 includes a diverging surface 30a concave toward the light emitting diode 10. The diverging surface 30a is convex from the substrate 20 toward the light emitting diode 10.

[0077] It should be noted that the structure of the divergent surface 30a is the same as the structure of the first diffusion surface 51 in the aforementioned example one, and the principle of increasing the light emission angle is also the same. The specific structure of the divergent surface 30a can refer to the description of the first diffusion surface 51 in the aforementioned example one, and will not be repeated here.

[0078] In this embodiment, a diverging surface 30a is provided on the packaging part 31. When the light emitted from the center of the light emitting diode 10 enters the diverging surface 30a, the incident light will diffuse on the diverging surface 30a in a direction away from the center of the light emitting diode 10. Specifically, a part of the incident light will be refracted on the diverging surface 30a, and the angle of the refracted light will increase, thereby increasing the light-emitting viewing angle above the light emitting diode 10; another part of the incident light will be reflected on the diverging surface 30a and enter the side of the packaging part 31. The reflected light will be refracted on the side of the packaging layer 30, so that the angle of the refracted light emitted from the side of the packaging part 31 increases, thereby increasing the light-emitting viewing angle of the side of the light emitting diode 10. Therefore, by providing the packaging part 31 including the above structure on the light emitting diode 10, this embodiment can further increase the light-emitting viewing angle above and on the side of the light emitting diode 10 on the light emitting substrate 100, and further reduce the number of light emitting diodes 10 used in the light emitting substrate 100 while ensuring the same backlight quality, so as to further reduce the production cost of the backlight product.

[0079] Please refer to Figure 5 The third embodiment of the present application provides a light-emitting substrate 100. The light-emitting substrate 100 provided in the third embodiment of the present application is different from the first embodiment in that the light-emitting substrate 100 further includes an encapsulation layer 30 covering the light-emitting diode 10. A concave portion 30A concave toward the light-emitting diode 10 is formed on a side of the encapsulation layer 30 away from the substrate 20.

[0080] Specifically, the encapsulation layer 30 is disposed on the entire surface. The material of the encapsulation layer 30 may include one or more of epoxy resin, acrylic resin and silicone.

[0081] The encapsulation layer 30 covers the upper surface of the light emitting diode 10 and fills the area between adjacent light emitting diodes 10. The recessed portion 30A covers the center of the light emitting diode 10. The surface of the encapsulation layer 30 away from the light emitting diode 10 is wavy.

[0082] It should be noted that, in this embodiment, the portion of the surface of the encapsulation layer 30 away from the substrate 20 corresponding to the light emitting diodes 10 is concave toward the substrate 20 to form a recessed portion 30A corresponding to each light emitting diode 10. In the region between adjacent light emitting diodes 10, the surface of the encapsulation layer 30 away from the substrate 20 is convex toward the substrate 20.

[0083] In this embodiment, when the light emitted from the center of the light emitting diode 10 enters the surface of the encapsulation layer 30, the incident light will diffuse in the direction away from the center of the light emitting diode 10 at the recessed portion 30A. Specifically, a portion of the incident light will be refracted on the surface of the recessed portion 30A, and the angle of the refracted light will increase, thereby increasing the light emitting viewing angle above the light emitting diode 10. While ensuring the same backlight quality, the number of light emitting diodes 10 used in the light emitting substrate 100 can be further reduced, thereby further reducing the production cost of the backlight product.

[0084] Please refer to Figures 6 to 8 The fourth embodiment of the present application provides a light-emitting substrate 100. The light-emitting substrate 100 provided in the fourth embodiment of the present application is different from that in the first embodiment in that the light-emitting substrate 100 also includes a lamp holder 40 disposed on the base 20. The lamp holder 40 includes a bottom surface 41, a first surface 42 and a second surface 43 respectively connected to the bottom surface 41. The bottom surface 41 contacts the surface of the base 20. The angle formed by the first surface 42 and the bottom surface 41, and the angle formed by the second surface 43 and the bottom surface 41 are both acute angles. At least one light-emitting diode 10 is disposed on each of the first surface 42 and the second surface 43.

[0085] In this embodiment, the lamp holder 40 is arranged on the base 20. Since the angle formed by the first surface 42 and the bottom surface 41 of the lamp holder 40 and the angle formed by the second surface 43 and the bottom surface 41 are both acute angles, for the same lamp holder 40, the light emitting diode 10 is arranged at an angle by using the lamp holder 40 as a carrier, thereby increasing the light emitting angle above the lamp holder 40, thereby further increasing the light emitting angle of the light emitting substrate 100, and improving the quality of the backlight. In addition, when the size of the light emitting substrate 100 is constant, under the above arrangement, more light emitting diodes 10 can be accommodated on the base 20, thereby further improving the quality of the backlight.

[0086] It should be noted that this embodiment is only described by taking the structure when the number of light-emitting diodes 10 on the first surface 42 and the second surface 43 is one as an example, but it is not limited to this. In some embodiments, the number of light-emitting diodes 10 on the first surface 42 and the second surface 43 can be two or more, and the specific number of light-emitting diodes 10 on the first surface 42 and the second surface 43 can be set according to actual application requirements, and this application does not limit this.

[0087] In some specific embodiments, the angle formed by the first surface 42 and the bottom surface 41, and the angle formed by the second surface 43 and the bottom surface 41 can be 30 degrees, 45 degrees or 60 degrees. The specific sizes of the above angles can also be adjusted according to the light-emitting angle of the light-emitting diode 10, and the present application does not limit this.

[0088] Furthermore, in this embodiment, the angle formed by the first surface 42 and the bottom surface 41 is equal to the angle formed by the second surface 43 and the bottom surface 41. The above arrangement can improve the light uniformity above the lamp holder 40, thereby facilitating the improvement of the light uniformity of the light emitting substrate 100 as a whole.

[0089] In this embodiment, a plurality of lamp holders 40 are arranged in an array on the substrate 20. Figure 7 As shown. In the first direction X and the second direction Y, the number of lamp holders 40 is multiple. Specifically, as Figure 8 As shown, the lamp holder 40 may be a triangular prism structure. In addition, the light emitting diodes 10 on the first surface 42 and the light emitting diodes 10 on the second surface 43 are symmetrical, and this arrangement can improve the light uniformity above the lamp holder 40 .

[0090] Please refer to Fig. 9 and Fig.10 The fifth embodiment of the present application provides a light-emitting substrate 100. The light-emitting substrate 100 provided in the fifth embodiment of the present application is different from that in the fourth embodiment in that the lamp holder 40 extends from one end of the base 20 to the other end of the base 20. A plurality of light-emitting diodes 10 are disposed on both the first surface 42 and the second surface 43.

[0091] Specifically, in the first direction X, the number of the lamp holder 40 is one, and in the second direction Y, the number of the lamp holder 40 is plural.

[0092] In this embodiment, the number of lamp holders 40 used in the first direction X is set to one, which greatly reduces the number of lamp holders 40 used, thereby reducing the difficulty of process operation of the light-emitting substrate 100. In addition, when the size of the light-emitting substrate 100 is constant, a lamp holder 40 can accommodate more light-emitting diodes 10, which helps to improve the quality of the backlight.

[0093] It should be noted that, in some embodiments, the number of the lamp holder 40 in the second direction Y may be one, and the number of the lamp holder 40 in the first direction X may be multiple, which will not be described in detail herein.

[0094] Please refer to Fig.11 and Fig.12 The sixth embodiment of the present application provides a light-emitting substrate 100. The light-emitting substrate 100 provided in the sixth embodiment of the present application is different from that in the fourth embodiment in that the lamp holder 40 further includes a third surface 44. The third surface 44 is connected between the first surface 42 and the second surface 43. The third surface 44 is parallel to the bottom surface 41. At least one light-emitting diode 10 is disposed on the third surface 44.

[0095] In this embodiment, a lamp holder 40 including a third surface 44 is provided so that the light-emitting diode 10 can be accommodated on the third surface 44, thereby increasing the light-emitting viewing angle of the light-emitting substrate 100 and increasing the light-emitting brightness directly above the lamp holder 40, thereby improving the light-emitting brightness on the front side of the light-emitting substrate 100.

[0096] It should be noted that this embodiment is only described by taking the case where the number of light-emitting diodes 10 on the third surface 44 is one as an example, but is not limited thereto. In some embodiments, the number of light-emitting diodes 10 on the third surface 44 may be two or more, and the specific number of light-emitting diodes 10 on the third surface 44 may be set according to actual application requirements, and this application does not limit this.

[0097] The present application also provides a display device, wherein the display device can be any product or component including a display function, such as an electronic paper, a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, etc.

[0098] For details, please refer to Fig.13 The display device 1000 provided in the present application includes a liquid crystal display panel 200 and a light-emitting substrate 100 disposed on one side of the liquid crystal display panel 200. The light-emitting substrate 100 may be the light-emitting substrate 100 described in any of the aforementioned embodiments, and the specific structure of the light-emitting substrate 100 may refer to the description of any of the aforementioned embodiments, which will not be repeated here.

[0099] Furthermore, the display device 1000 also includes a frame 300 and an optical module 400. Specifically, the frame 300 includes a bottom plate 301, a side wall 302 and a middle frame 303. The bottom plate 301 is arranged on a side of the light-emitting substrate 100 away from the liquid crystal display panel 200, and is used to carry the light-emitting substrate 100. The side wall 302 is arranged on the bottom plate 301 and connected to the bottom plate. The middle frame 303 is arranged on the side wall 302. The optical module 400 abuts against the inner surface of the middle frame 303. Among them, the optical module 400 may include a diffuser plate 401, a diffuser sheet 402, a quantum dot film 403 and a prism sheet 404 which are sequentially arranged above the light-emitting substrate 100.

[0100] It should be noted that the structure of the display device 1000 in this embodiment is only for illustration and is used to facilitate the description of this embodiment. In some embodiments, the display device 1000 may further include other film layer structures, which will not be described in detail herein.

[0101] The above is a detailed introduction to a light-emitting diode, a light-emitting substrate and a display device provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A light emitting diode, characterized in that: include: a first semiconductor layer; A light-emitting layer is disposed on the first semiconductor layer, and a light-emitting surface of the light-emitting layer is a plane; A second semiconductor layer is disposed on a side of the light emitting layer away from the first semiconductor layer and located on a light emitting surface of the light emitting layer; as well as A first protective layer is disposed on a side of the second semiconductor layer away from the light emitting layer; Among them, the second semiconductor layer includes a first diffusion surface away from the light-emitting layer and a first bottom surface close to the light-emitting layer, the first diffusion surface includes a first central curved surface and a first edge curved surface connected to the first central curved surface, the first central curved surface is concave toward the light-emitting layer, the first edge curved surface includes a top surface and a side surface, the top surface is connected to the first central curved surface and is convex relative to the light-emitting surface of the light-emitting layer, the side surface is connected between the top surface and the first bottom surface, the side surface is convex in a direction perpendicular to the light-emitting layer, and the first bottom surface is in contact with the light-emitting surface of the light-emitting layer and is a plane.

2. The light emitting diode according to claim 1, characterized in that: The central curved surface covers the center of the light-emitting layer.

3. The light emitting diode according to claim 1, characterized in that: The surface of the first protection layer away from the second semiconductor layer is a second diffusion surface, the second diffusion surface includes a second central curved surface and a second edge curved surface connected to the second central curved surface, the second central curved surface is concave toward the light-emitting layer, and the second edge curved surface is convex toward the light-emitting layer; The first protection layer also includes a second bottom surface, wherein the second bottom surface is in contact with the first diffusion surface and connected to the second edge curved surface.

4. A light-emitting substrate, characterized in that: The invention comprises a substrate and a light emitting diode arranged on the substrate, wherein the light emitting diode is the light emitting diode as claimed in claim 1.

5. The light-emitting substrate according to claim 4, characterized in that: The light emitting substrate further comprises a packaging layer covering the light emitting diode, and a concave portion concave toward the light emitting diode is formed on a side of the packaging layer away from the base.

6. The light-emitting substrate according to claim 5, characterized in that: The packaging layer includes a plurality of packaging parts, each of which includes the recessed part covering the center of a light-emitting diode, and the surface of the recessed part away from the light-emitting diode includes a diverging surface concave toward the light-emitting diode, and the diverging surface convex from the base toward the light-emitting diode.

7. The light-emitting substrate according to claim 5, characterized in that: The packaging layer covers the upper surface of the light emitting diode and fills the area between adjacent light emitting diodes, and the recessed portion covers the center of the light emitting diode; the surface of the packaging layer away from the light emitting diode is wavy.

8. The light-emitting substrate according to claim 4, characterized in that: The light-emitting substrate also includes a lamp holder arranged on the base, the lamp holder includes a bottom surface, a first surface and a second surface respectively connected to the bottom surface, the bottom surface is in contact with the surface of the base, the angle formed by the first surface and the bottom surface, and the angle formed by the second surface and the bottom surface are both acute angles, and at least one light-emitting diode is arranged on the first surface and the second surface.

9. The light-emitting substrate according to claim 8, characterized in that: An included angle between the first surface and the bottom surface is equal to an included angle between the second surface and the bottom surface.

10. The light emitting substrate according to claim 8, characterized in that: The lamp holder further includes a third surface, the third surface is connected between the first surface and the second surface, the third surface is parallel to the bottom surface, and at least one light emitting diode is disposed on the third surface.

11. The light emitting substrate according to claim 8, characterized in that: The lamp holder extends from one end of the base to the other end of the base. A plurality of light-emitting diodes are disposed on both the first surface and the second surface, and the light-emitting diodes on the first surface and the light-emitting diodes on the second surface are symmetrical.

12. A display device, characterized in that: It comprises a liquid crystal display panel and a light-emitting substrate arranged on one side of the liquid crystal display panel, and the light-emitting substrate is the light-emitting substrate according to any one of claims 4 to 11.

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