Light-emitting substrate, light-emitting device and display device

Abstract

The invention provides a light-emitting substrate, a light-emitting device and a display device, and relates to the technical field of display, the light-emitting substrate comprises a substrate and a plurality of light-emitting devices arranged on the substrate in an array; the substrate comprises a middle area and a peripheral area surrounding the middle area; the light-emitting device comprises a first light-emitting device and a second light-emitting device; the half-power angle of the second light-emitting device is configured to be larger than that of the first light-emitting device; the middle area is only provided with the first light-emitting device, and the peripheral area is at least provided with one second light-emitting device. The light-emitting substrate is suitable for preparation of a narrow-frame display device.

Description

Technical Field

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

[0002] With the development of display technology, people have higher and higher requirements on the picture quality and performance of display products. In display products of related technologies, the display screen often has reduced brightness or becomes noticeably darker near the edge area of ​​the display product, which reduces the display effect. Summary of the invention

[0003] The embodiments of the present application adopt the following technical solutions:

[0004] In a first aspect, at least one embodiment of the present application provides a light-emitting substrate, including:

[0005] a substrate comprising a middle region and a peripheral region surrounding the middle region;

[0006] A plurality of light-emitting devices arranged in an array on the substrate;

[0007] Wherein, the light emitting device comprises a first light emitting device and a second light emitting device; a half power angle of the second light emitting device is configured to be greater than a half power angle of the first light emitting device;

[0008] The middle area is only provided with the first light emitting device, and the peripheral area is provided with at least one second light emitting device.

[0009] In at least one embodiment of the present application, the peripheral area has a closed contour; the size of the middle area along the first direction is X times the size of the ring along the first direction, the size of the middle area along the second direction is X times the size of the ring along the second direction, the first direction and the second direction intersect, and the value range of X is 7 to 8.

[0010] In at least one embodiment of the present application, the peripheral area is only provided with the second light-emitting device, and along the first direction, the distance between two adjacent first light-emitting devices is greater than or equal to the distance between two adjacent second light-emitting devices;

[0011] Along the second direction, a distance between two adjacent first light emitting devices is greater than or equal to a distance between two adjacent second light emitting devices.

[0012] In at least one embodiment of the present application, along the first direction, the distance between adjacent first light-emitting devices and second light-emitting devices is less than or equal to the distance between two adjacent first light-emitting devices;

[0013] Along the second direction, a distance between adjacent first light emitting devices and second light emitting devices is less than or equal to a distance between two adjacent first light emitting devices.

[0014] In at least one embodiment of the present application, the peripheral area is only provided with the second light-emitting device, and along the first direction, the distance between two adjacent first light-emitting devices is less than or equal to the distance between two adjacent second light-emitting devices;

[0015] Along the second direction, a distance between two adjacent first light emitting devices is less than or equal to a distance between two adjacent second light emitting devices.

[0016] In at least one embodiment of the present application, along the first direction, the distance between the second light-emitting device closest to any edge of the substrate and the edge is not greater than the distance between two adjacent first light-emitting devices; along the second direction, the distance between the second light-emitting device closest to any edge of the substrate and the edge is not greater than the distance between two adjacent first light-emitting devices.

[0017] In at least one embodiment of the present application, the brightness of the peripheral area is greater than or equal to 70% of the brightness of the middle area.

[0018] In at least one embodiment of the present application, the brightness difference between the peripheral area and the middle area is less than 0.04*10 7 Lux.

[0019] In at least one embodiment of the present application, the peripheral area and the middle area respectively include an integer number of light zones, each of the light zones includes a*b electrically connected light-emitting devices, wherein a and b are both positive integers.

[0020] In at least one embodiment of the present application, the number of lamp zones included in the peripheral area and the middle area is non-integer, and each of the lamp zones includes a*b electrically connected light-emitting devices, wherein a and b are both positive integers.

[0021] In a second aspect, an embodiment of the present application provides a light-emitting device, comprising a light-emitting substrate as described in any one of the first aspects.

[0022] In at least one embodiment of the present application, the light-emitting device further comprises a diffusion plate, a quantum dot film, a diffusion sheet and a composite film which are stacked in sequence; wherein the diffusion plate is located on the light-emitting side of the light-emitting substrate.

[0023] In a third aspect, an embodiment of the present application provides a display device, comprising a display panel and a light-emitting device as described in the second aspect, wherein the display panel is located on the light-emitting side of the light-emitting device, and the colors of the light emitted by all the light-emitting devices in the light-emitting device are the same.

[0024] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of light superposition of a light emitting substrate in a related technology provided in an embodiment of the present application;

[0027] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure along the cutting line M1-M2;

[0028] Figure 3 A schematic cross-sectional structure diagram of a light-emitting substrate provided in an embodiment of the present application;

[0029] Figure 4 A comparison diagram of diffusion distances of light emitted by a first light emitting device and a second light emitting device provided in an embodiment of the present application;

[0030] Figure 5A and Figure 5B A schematic diagram of a top view of two peripheral areas and a middle area provided in an embodiment of the present application;

[0031] Figure 6 A schematic diagram of different light emission angles and light intensity distribution of the second light emitting device provided in an embodiment of the present application;

[0032] Figure 7 A schematic diagram of different light emission angles and light intensity distribution of the first light emitting device provided in an embodiment of the present application;

[0033] Figure 8-Figure 10 Schematic diagram of top view of four light-emitting substrates provided in the embodiments of the present application;

[0034] Fig.11 for Fig.10 A schematic diagram of the cross-sectional structure along the cutting line M3-M4;

[0035] Fig.12 A schematic diagram of a cross-sectional structure of a light emitting device provided in an embodiment of the present application;

[0036] Fig.13 A schematic diagram of a cross-sectional structure of a display device provided in an embodiment of the present application;

[0037] Fig.14 A top view of a display screen of a light-emitting device prepared by a light-emitting substrate in the related art provided in an embodiment of the present application;

[0038] Fig.15 for Fig.14 The brightness curve tested along the horizontal direction of the display screen;

[0039] Fig.16 for Fig.14 The brightness curve tested along the vertical direction of the display screen;

[0040] Fig.17 A top view structural diagram of a display screen of a light-emitting device prepared by a light-emitting substrate provided in an embodiment of the present application;

[0041] Fig.18 for Fig.17 The brightness curve tested along the horizontal direction of the display screen;

[0042] Fig.19 for Fig.17 The brightness curve tested along the vertical direction of the display screen. DETAILED DESCRIPTION

[0043] 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 ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] In the embodiments of the present application, words such as "first", "second", "third", and "fourth" are used to distinguish between identical or similar items with basically the same functions and effects. This is only for the purpose of clearly describing the technical solutions of the embodiments of the present application and shall not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0045] In the embodiments of the present application, the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0046] In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" are intended to indicate that a specific feature, structure, material or characteristic associated with the embodiment or example is included in at least one embodiment or example of the present application. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0047] In the embodiments of the present application, “plurality” means two or more, and “at least one” means one or more, unless otherwise clearly defined.

[0048] The features such as "parallel", "perpendicular", and "same" used in the embodiments of the present application include the features such as "parallel", "perpendicular", and "same" in a strict sense, as well as the cases where "approximately parallel", "approximately perpendicular", "approximately the same", etc. include certain tolerances, taking into account the tolerances related to the measurement of specific quantities (e.g., the limitations of the measurement system), and are expressed as being within the acceptable deviation range for a specific value determined by a person of ordinary skill in the art. For example, "approximately" can mean within one or more standard deviations, or within 3% or 5% of the value.

[0049] Unless the context requires otherwise, throughout the specification and claims, the term "comprising" is to be construed in an open, inclusive sense, ie, meaning "including, but not limited to."

[0050] The polygon in this specification is not a strict polygon, and may be an approximate triangle, parallelogram, trapezoid, pentagon or hexagon, etc., and there may be some small deformations caused by tolerance.

[0051] Combination Figure 1 and Figure 2 ,in, Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the cutting line M1-M2, Figure 2The dotted arrow in the middle represents the propagation path of the light. The light emitted by the light-emitting device 2 can be refracted on the interface of the packaging unit 3 to modulate the light emission range of the light-emitting device. Specifically, a plurality of light-emitting devices 2 are arranged in an array on the light-emitting substrate, and the light-emitting device 2 can be a Mini LED (Mini Light Emitting Diode). The illumination areas of the first row of light-emitting devices 2 on the optical film layer 4 are, from left to right, illumination area EA1-1, illumination area EA1-2, illumination area EA1-3, illumination area EA1-4, etc. For each independent light-emitting device 2, the brightness of the light emitted by it in the area of ​​the optical film layer facing the geometric center of the light-emitting device 2 is greater than the brightness of the area of ​​the optical film layer away from the geometric center of the light-emitting device 2. For the non-edge areas of the optical film layer 4, for example, the light emitting devices 2 corresponding to the illumination areas EA1-2 and EA1-3, respectively, although the brightness of the light emitted by each of them in the area of ​​the optical film layer facing the geometric center of the light emitting device 2 is greater than the brightness of the area of ​​the optical film layer far from the geometric center of the light emitting device 2, the illumination areas of the two adjacent light emitting devices 2 on the optical film layer 4 overlap (i.e. Figure 2 The phenomenon of uneven brightness of different areas of a single light-emitting device on the optical film layer 4 can be alleviated; and for the light-emitting device 2 corresponding to the illumination area EA1-1, the edge area closest to the optical film layer 4, the brightness of the light emitted by it in the area close to the edge of the optical film layer 4 is relatively weak relative to the brightness of the area of ​​the optical film layer facing the geometric center of the light-emitting device 2; and the light in the area close to the edge of the optical film layer 4 does not overlap with the illumination area of ​​any other light-emitting device 2 on the optical film layer 4 (i.e. Figure 2 Thus, when the light-emitting substrate is used to provide a surface light source, the brightness of the edge of the light-emitting substrate is lower than the brightness of the middle area, causing the edge to be dark, reducing the brightness uniformity, and reducing the user experience.

[0052] Based on this, at least one embodiment of the present application provides a light-emitting substrate 100, such as Figure 3 As shown, the light emitting substrate 100 includes:

[0053] A substrate 1, the substrate 1 comprising a middle region ZJ and a peripheral region ZB surrounding the middle region ZJ;

[0054] A plurality of light emitting devices 2 arranged in an array are disposed on a substrate 1;

[0055] The light emitting device 2 includes a first light emitting device 21 and a second light emitting device 22; the half power angle of the second light emitting device 22 is configured to be greater than the half power angle of the first light emitting device 21; Figure 8 , Fig. 9A , Fig. 9B, Fig.10 and Fig.11 As shown, only the first light emitting device 21 is disposed in the middle zone ZJ, and at least one second light emitting device 22 is disposed in the peripheral zone ZB.

[0056] in, Fig.11 for Fig.10 Schematic diagram of the cross-sectional structure along the cutting line M3-M4.

[0057] It should be noted that Figure 3 and Fig.11 The optical film layer 4 shown in the figure is only for illustrating the position of the light receiving surface of the light emitting substrate 100 , so as to facilitate description of the diffusion distance of the light emitting device 2 . The light emitting substrate does not include the optical film layer 4 .

[0058] In an exemplary embodiment, the substrate 1 may be a rigid substrate, the material of which may be any one of glass, quartz, PET, and plastic, and the thickness of the rigid substrate may be 0.2 mm to 1 mm. For example, the thickness of the rigid substrate may be 0.2 mm, 0.4 mm, 0.5 mm, 0.7 mm, or 1 mm.

[0059] In an exemplary embodiment, the light emitting substrate 100 may include a plurality of light zones DQ arranged in an array, and each light zone DQ includes at least one light emitting device 2 .

[0060] There is no limitation on the number of light zones DQ that the light-emitting substrate 100 can include. For example, when the light-emitting substrate 100 is applied to a small-sized display product, such as a mobile phone, an electronic watch, a computer screen, etc., the light-emitting substrate 100 can include 9 light zones, 16 light zones or 25 light zones; when the light-emitting substrate 100 is applied to a large-sized display product, such as a television or an outdoor display screen, the light-emitting substrate 100 can include dozens, hundreds or even thousands of light zones, such as 1440 light zones; the specific number can be determined according to the actual application requirements.

[0061] In an exemplary embodiment, for each lamp area DQ in the light-emitting substrate 100, its state can be controlled individually, for example: a lamp area DQ can be controlled individually to be in a lit state or an unlit state; its brightness can also be controlled individually, for example, a lamp area DQ can be controlled individually to increase or decrease its brightness.

[0062] In an exemplary embodiment, a lamp zone DQ may include a light emitting device 2 to achieve independent control of each light emitting device 2; or, a lamp zone DQ may include multiple light emitting devices 2, for example, a lamp zone DQ may include 4, 6 or 9 light emitting devices 2, and all light emitting devices 2 in the same lamp zone DQ may be controlled by the same micro-driver chip.

[0063] In an exemplary embodiment, the light emitting device 2 may be a sub-millimeter light emitting diode (Mini Light Emitting Diode, abbreviated as Mini LED in English) or a micro light emitting diode (Micro Light Emitting Diode, abbreviated as Micro LED in English), which is not limited here.

[0064] In addition, in addition to the light-emitting device 2, any one of the devices such as sensor devices, micro-drive chips or other types of devices may be arranged in the light-emitting substrate 100. It is understandable that the number of different types of devices is different, or the density of the array arrangement of different types of devices is different. The above-mentioned light-emitting device 2, sensor device, micro-drive chip or other types of devices are collectively referred to as devices.

[0065] In an exemplary embodiment, a micro-driving chip may be provided for each lamp zone DQ, and the micro-driving chip is used in the light-emitting substrate 100 to control the overall light brightness of each lamp zone DQ, so as to realize the local dimming control function of the light-emitting substrate 100 .

[0066] In some embodiments, the micro-driving chip and the light-emitting device 2 can be arranged on the same side of the substrate 1; in other embodiments, the light-emitting device 2 is arranged on one side of the substrate 1, and the micro-driving chip is arranged on the other side of the substrate 1. When the light-emitting device 2 and the micro-driving chip are arranged on both sides of the substrate 1, the design space of the light-emitting substrate 100 can be greatly saved, which is conducive to the preparation of the light-emitting substrate 100 with a large number of partitions.

[0067] In addition to the luminous performance, the first light-emitting device 21 and the second light-emitting device 22 are of the same type. For example, the first light-emitting device 21 and the second light-emitting device 22 are both sub-millimeter light-emitting diodes (Mini Light Emitting Diode, abbreviated as Mini LED in English); for another example, the first light-emitting device 21 and the second light-emitting device 22 are both micro light-emitting diodes (MicroLight Emitting Diode, abbreviated as Micro LED in English).

[0068] Exemplarily, the plurality of light emitting devices 2 may all be sub-millimeter light emitting diodes or micro light emitting diodes emitting blue light, or the light emitting device 2 may simultaneously include three types of light emitting diodes or micro light emitting diodes emitting red light, green light and blue light.

[0069] In the light-emitting substrate provided in the embodiment of the present application, the first light-emitting device 21 and the second light-emitting device 22 have different light-emitting properties, wherein the light-emitting properties of the first light-emitting device 21 and the second light-emitting device 22 include but are not limited to: light intensity, light type of emitted light, light diffusion angle, and light diffusion distance. Among them, the light intensity is related to the magnitude of the driving current, which can be specifically determined according to the design value of the driving current.

[0070] For example, Figure 4 As shown, the light pattern comparison of the light emitted by the first light emitting device 21 and the second light emitting device 22 is shown, wherein: Figure 4 The curve marked 1 is the light type curve of the first light emitting device 21, and the curve marked 2 is the light type curve of the second light emitting device 22. Figure 4 The horizontal axis in is the diffusion distance of the light after it is emitted in the direction perpendicular to the light emitted from the normal viewing angle, and the vertical axis is the percentage of the luminous intensity (brightness); Figure 4 It can be seen that under the same brightness, the diffusion distance of the first light-emitting device 21 is significantly smaller than the diffusion distance of the second light-emitting device 22, and the half-height width (about 8 mm) of the light diffusion curve of the second light-emitting device 22 is significantly larger than the half-height width (about 4 mm) of the light diffusion curve of the first light-emitting device 21.

[0071] It should be noted that Figure 4 The data of the ordinate brightness in is normalized data, which does not mean that when the diffusion distance is 0 mm (normal viewing angle), the brightness of the light emitted by the first light emitting device 21 and the second light emitting device 22 is the same, nor does it mean that when the diffusion distance is greater than 0 mm, the brightness of the light emitted by the first light emitting device 21 is less than the brightness of the light emitted by the second light emitting device 22. Among them, the luminous intensity is related to the magnitude of the driving current, and can be specifically determined according to the design value of the driving current.

[0072] In an exemplary embodiment, the diffusion distance of the light is proportional to the diffusion angle of the light, that is, the greater the diffusion distance of the light, the greater the diffusion angle of the light.

[0073] The half-power angle of the second light emitting device 22 is configured to be greater than the half-power angle of the first light emitting device 21. The power angle is also called the luminous angle. The industry usually uses the half-power angle to characterize the performance of the light emitting device. The half-power angle is the angle corresponding to when the luminous intensity of a light emitting device is half of the maximum luminous intensity of the light emitting device.

[0074] Exemplarily, the larger the half-power angle of the light emitting device 2 is, the larger the diffusion distance of the light emitted by the light emitting device 2 is.

[0075] In an exemplary embodiment, Figure 6FIG. 1 shows a schematic diagram of different light output angles and light intensity distribution of a second light emitting device 22 in the H direction and the V direction, respectively, wherein the H direction and the V direction are two directions passing through the geometric center of the second light emitting device 22 and perpendicular to each other. Figure 6 It can be seen that, whether in the H direction or the V direction, the brightness of the second light emitting device 22 when the absolute value of the viewing angle is less than 45° is lower than the brightness of the second light emitting device 22 when the absolute value of the viewing angle is greater than 45°; it should be noted that Figure 6 In the curve marked Direction H, 45° and -45° respectively represent the brightness distribution along the left viewing angle of 45° and the right viewing angle of 45°; in the curve marked Direction V, 45° and -45° respectively represent the brightness distribution along the upper viewing angle of 45° and the lower viewing angle of 45°.

[0076] In an exemplary embodiment, Figure 7 FIG. 1 shows a schematic diagram of different light output angles and light intensity distribution of a first light emitting device 21 in the H direction and the V direction, respectively; wherein the H direction and the V direction are two directions passing through the geometric center of the first light emitting device 21 and perpendicular to each other. Figure 7 It can be seen that, whether in the H direction or the V direction, the brightness of the first light emitting device 21 when the absolute value of the viewing angle is less than 45° is greater than the brightness of the first light emitting device 21 when the absolute value of the viewing angle is greater than 45°; it should be noted that Figure 7 In the curve marked Direction H, 45° and -45° respectively represent the brightness distribution along the left viewing angle of 45° and the right viewing angle of 45°; in the curve marked Direction V, 45° and -45° respectively represent the brightness distribution along the upper viewing angle of 45° and the lower viewing angle of 45°.

[0077] Among them, only the first light emitting device 21 is arranged in the middle area ZJ, and at least one second light emitting device 22 is arranged in the peripheral area ZB, including but not limited to the following situations:

[0078] First, only the second light emitting device 22 is disposed in the peripheral area ZB.

[0079] Of course, it can be understood that in some embodiments, the peripheral area ZB refers to the edge area of ​​the substrate 1 closest to the light-emitting substrate 100, and the Y-row light-emitting devices 2 closest to the edge of the light-emitting substrate are all second light-emitting devices, and Y is a positive integer greater than or equal to 1; for the case where the light-emitting devices are arranged in an array on the substrate, the above-mentioned "row" includes rows and / or columns. For example, Figure 8 As shown, in some embodiments, the light emitting devices 2 located on the substrate 1 closest to the edge of the light emitting base plate 100 are all second light emitting devices 22, that is, Y=1; in the case where the light emitting devices are arranged in an array on the substrate, the light emitting devices in the first row, the last row, the first column, and the last column are second light emitting devices. For another example, in some embodiments, the light emitting devices in the lamp area where the light emitting device 2 located on the substrate 1 closest to the edge of the light emitting base plate 100 is located are all second light emitting devices; Fig.10 As shown, every 2*2 light emitting devices 2 form a light zone, and the light zones closest to the edge of the light emitting substrate 100 are all filled with second light emitting devices 22 .

[0080] Second, the peripheral area ZB is provided with not only the second light-emitting device 22 but also the first light-emitting device 21; illustratively, at least one second light-emitting device 22 is provided at the vertex position of two adjacent edges of the light-emitting substrate 100 in the peripheral area ZB, and the first light-emitting device 21 can be provided at a position of the peripheral area ZB parallel to a certain edge of the light-emitting substrate 100 and close to the middle area ZJ. Fig. 9A As shown, the two rows of light-emitting devices 2 closest to the edge of the light-emitting substrate are located in the peripheral area ZB, among which the light-emitting devices in the first row, the last row, the first column, and the last column are second light-emitting devices 22, and among the light-emitting devices in the second row, the second to last row, the second column, and the second to last column, the light-emitting device 2 that is relatively closer to the collective center of the substrate 1 is the second light-emitting device 22.

[0081] In at least one embodiment of the present application, Figure 3 As shown, the light-emitting substrate 100 also includes a plurality of packaging units 3 corresponding to devices (including but not limited to the light-emitting device 2 ), and the orthographic projection of the packaging unit 3 on the substrate 1 covers the orthographic projection of the device (eg, the light-emitting device 2 ) on the substrate 1 .

[0082] Exemplarily, each packaging unit 3 encapsulates a device (e.g., light emitting device 2). While the packaging unit 3 plays a role in packaging and protecting the device (e.g., light emitting device 2), the light emitting angle of the light emitting device 2 can be further adjusted by designing the shape of the surface away from the substrate 1, for example, making it have a convex lens-like surface.

[0083] In some embodiments, the light-emitting substrate 100 may further include a packaging layer disposed on a side of the device (eg, the light-emitting device 2 ) away from the substrate 1 , for protecting the device (eg, the light-emitting device 2 ).

[0084] For example, the encapsulation layer may be a whole layer covering the plurality of light emitting devices 2 .

[0085] In some embodiments, the light emitting substrate may further include Fig.12The reflective layer 5 shown in the figure is located on the substrate 1 and has a plurality of hollow regions along a direction perpendicular to the substrate 1 , and devices (such as the light emitting device 2) are arranged in the hollow regions.

[0086] Since the light emitted by the light emitting device 2 is emitted in all directions, the reflective layer 5 can reflect the light emitted by the light emitting device 2 to the light emitting surface of the light emitting substrate 100 to improve the light utilization rate of the light emitting device 2 .

[0087] Exemplarily, the color of the reflective layer 5 is white, so that the reflective layer 5 has a higher reflectivity.

[0088] In some embodiments, the reflective layer 5 may be a sheet structure having a plurality of hollow regions, or the reflective layer 5 may also be manufactured on the light-emitting substrate 100 by processes such as sputtering, plating, and coating.

[0089] Exemplarily, the material of the reflective layer 5 may include white ink, the components of which include resin (eg, epoxy resin, polytetrafluoroethylene resin), titanium dioxide (chemical formula TiO2), and an organic solvent (eg, dipropylene glycol methyl ether), etc.

[0090] Exemplarily, the material of the reflective layer 5 may also include silicone white glue. When the material of the reflective layer 5 includes white ink or silicone white glue, the reflective layer 5 may be formed by printing using a screen printing process, or by spray coating using a glue valve spraying process.

[0091] Exemplarily, the reflective layer 5 may be formed by one or more screen printing processes.

[0092] When the reflective layer 5 is manufactured by multiple screen printing processes, the portion of the reflective layer 5 located at the edge of the hollow area may be in a step shape.

[0093] Exemplarily, the shape of the orthographic projection of the hollow area on the substrate 1 can be a circle, a triangle, a rectangle, etc.

[0094] In the light-emitting substrate provided in the embodiment of the present application, the light-emitting device 2 includes a first light-emitting device 21 and a second light-emitting device 22, and the half-power angle of the second light-emitting device 22 is configured to be greater than the half-power angle of the first light-emitting device 21; and only the first light-emitting device 21 is provided in the middle area ZJ of the substrate 1 of the light-emitting substrate 100, and at least one second light-emitting device 22 is provided in the peripheral area ZB. In this way, when the light-emitting substrate 100 is applied to a light-emitting device, the brightness of the edge of the light-emitting device can be improved, and the brightness uniformity of the light emitted by the light-emitting device can be improved, thereby improving the problem of dark edges and improving the display effect.

[0095] In at least one embodiment of the present application, Figure 3As shown, the area of ​​the light emitting area EA-21 of the first light emitting device 21 on the reference plane (for example, the surface of the optical film layer 4 close to the substrate 1) is smaller than the area of ​​the light emitting area EA-22 of the second light emitting device 22 on the reference plane. The reference plane is located on the light emitting side of the light emitting device 2 and is parallel to the plane where the substrate 1 is located; the half-power angle β of the first light emitting device 21 is smaller than the half-power angle α of the second light emitting device 22.

[0096] Exemplarily, the half power angle β of the first light emitting device 21 is less than or equal to 140°.

[0097] Exemplarily, the half-power angle α of the second light-emitting device 22 is greater than 140° and less than 180 degrees; for example, the half-power angle α of the second light-emitting device 22 is greater than 150° and less than or equal to 170°. Specifically, the half-power angle α of the second light-emitting device 22 can be 155°, 158°, 160°, 162°, 164°, 165°, 168°, or 170°.

[0098] In the embodiment of the present application, at least one circle of light emitting devices 2 located on the substrate 1 near the edge of the light emitting substrate is set as the second light emitting device 22, the area of ​​the light emitting region EA-21 of the first light emitting device 21 on the reference surface (for example, the surface of the optical film layer 4 close to the substrate 1) is smaller than the area of ​​the light emitting region EA-22 of the second light emitting device 22 on the reference surface, and the half-power angle β of the first light emitting device 21 is smaller than the half-power angle α of the second light emitting device 22. In this way, when the light emitting substrate 100 is applied to a light emitting device, the brightness of the edge of the light emitting device can be improved, and the brightness uniformity of the light emitted by the light emitting device can be improved, thereby improving the problem of dark edges and improving the display effect.

[0099] In at least one embodiment of the present application, Figure 5A and Figure 5B As shown, the peripheral area ZB of the light-emitting substrate 100 has a closed contour, and the contour of the peripheral area is similar to the plane contour of the base substrate; the size of the middle area ZJ along the first direction (for example, the vertical direction OA) is X times the size of the ring along the first direction (for example, the vertical direction OA), and the size of the middle area ZJ along the second direction (for example, the horizontal direction OB) is X times the size of the ring along the second direction (for example, the horizontal direction OB), the first direction (for example, the vertical direction OA) and the second direction (for example, the horizontal direction OB) intersect, and the value range of X is 7 to 8.

[0100] Exemplarily, X may be 7, 7.3, 7.5, 7.8, or 8.

[0101] For example, Figure 5AAs shown, X is equal to 8, the width of the peripheral area ZB along the first direction (for example, the vertical direction OA) is (1 / 10)*H, the width of the middle area ZJ along the first direction (for example, the vertical direction OA) is (8 / 10)*H, and the width of the middle area ZJ along the first direction (for example, the vertical direction OA) is 8 times the width of the ring along the first direction; the width of the peripheral area ZB along the second direction (for example, the horizontal direction OB) is (1 / 10)*H, the width of the middle area ZJ along the second direction (for example, the horizontal direction OB) is (8 / 10)*H, and the width of the middle area ZJ along the second direction (for example, the horizontal direction OB) is 8 times the width of the peripheral area ZB along the second direction.

[0102] For example, Figure 5B As shown, X is equal to 7, the width of the peripheral area ZB along the first direction (for example, the vertical direction OA) is (1 / 9)*H, the width of the middle area ZJ along the first direction (for example, the vertical direction OA) is (7 / 9)*H, and the width of the middle area ZJ along the first direction (for example, the vertical direction OA) is 7 times the width of the ring along the first direction; the width of the peripheral area ZB along the second direction (for example, the horizontal direction OB) is (1 / 9)*H, the width of the middle area ZJ along the second direction (for example, the horizontal direction OB) is (7 / 9)*H, and the width of the middle area ZJ along the second direction (for example, the horizontal direction OB) is 7 times the width of the peripheral area ZB along the second direction.

[0103] In an exemplary embodiment, the more lamp zones DQ there are in the light-emitting substrate 100, the smaller the size of the light-emitting device 2 is, and the smaller the distance between two adjacent light-emitting devices 2 is, the more lamp zones DQ there are in the peripheral area ZB, and the more second light-emitting devices 22 there are in the peripheral area ZB.

[0104] Exemplarily, at least one circle of second light emitting devices 22 is disposed in the peripheral area ZB of the light emitting substrate 100 .

[0105] Exemplarily, at least one circle of light zones DQ is arranged in the peripheral area ZB of the light-emitting substrate 100 , and all the light-emitting devices 2 included in the light zones DQ in the peripheral area ZB are second light-emitting devices 22 .

[0106] The number of the second light-emitting devices 22 disposed in the peripheral area ZB is not limited here, and can be determined specifically according to the number of the lamp zones DQ in the light-emitting substrate 100 and the distribution density of the light-emitting devices 2 .

[0107] In at least one embodiment of the present application, Figure 8 and Fig.10As shown, the light emitting substrate 100 includes a middle area ZJ and a peripheral area ZB surrounding the middle area ZJ, wherein only the second light emitting device 22 is arranged in the peripheral area ZB, and only the first light emitting device 21 is arranged in the middle area ZJ.

[0108] In the embodiment of the present application, by only providing the second light-emitting device 22 in the peripheral area ZB and only providing the first light-emitting device 21 in the middle area ZJ, when the light-emitting substrate 100 is applied to a light-emitting device, the brightness of the edge of the light-emitting device can be improved, and the brightness uniformity of the light emitted by the light-emitting device can be improved, thereby improving the problem of dark edges of the light-emitting device and improving the display effect.

[0109] In at least one embodiment of the present application, Figure 8 and Fig.10 As shown, the peripheral area ZB is only provided with the second light emitting device 22; Fig.10 As shown, along the first direction (for example, the vertical direction OA), the distance D1' between two adjacent first light-emitting devices 21 is greater than or equal to the distance D4' between two adjacent second light-emitting devices 22; along the second direction (for example, the horizontal direction OB), the distance D1 between two adjacent first light-emitting devices 21 is greater than or equal to the distance D4 between two adjacent second light-emitting devices 22.

[0110] In practical applications, it can be arranged that in a first direction (for example, a vertical direction OA), a distance D1' between two adjacent first light-emitting devices 21 is greater than or equal to a distance D4' between two adjacent second light-emitting devices 22, and in a second direction (for example, a horizontal direction OB), a distance D1 between two adjacent first light-emitting devices 21 is greater than or equal to a distance D4 between two adjacent second light-emitting devices 22; in this way, a distribution density of the second light-emitting devices 22 located in the peripheral area ZB can be arranged to be greater than or equal to a distribution density of the first light-emitting devices 21 located in the middle area ZJ, thereby further improving the luminous brightness of the light-emitting substrate located in the peripheral area ZB, improving the brightness of the edge of the light-emitting device, and improving the brightness uniformity of the light emitted by the light-emitting device, thereby improving the problem of dark edges of the light-emitting device and improving the display effect.

[0111] In at least one embodiment of the present application, Fig.10As shown, along the first direction (for example, the vertical direction OA), the distance D2' between the adjacent first light-emitting devices 21 and the second light-emitting devices 22 arranged at the junction of the peripheral area ZB and the middle area is less than or equal to the distance D1' between the two adjacent first light-emitting devices 21; along the second direction (for example, the horizontal direction OB), the distance D2 between the adjacent first light-emitting devices 21 and the second light-emitting devices 22 arranged at the junction of the peripheral area ZB and the middle area is less than or equal to the distance D1 between the two adjacent first light-emitting devices 21.

[0112] Exemplarily, along the first direction (for example, the vertical direction OA), the distance D2' between the adjacent first light-emitting devices 21 and the second light-emitting devices 22 arranged at the junction of the peripheral area ZB and the middle area is smaller than the distance D1' between the two adjacent first light-emitting devices 21; along the second direction (for example, the horizontal direction OB), the distance D2 between the adjacent first light-emitting devices 21 and the second light-emitting devices 22 arranged at the junction of the peripheral area ZB and the middle area is smaller than the distance D1 between the two adjacent first light-emitting devices 21.

[0113] Exemplarily, along the first direction (for example, the vertical direction OA), the distance D2' between the adjacent first light-emitting devices 21 and the second light-emitting devices 22 arranged at the junction of the peripheral area ZB and the middle area is equal to the distance D1' between the two adjacent first light-emitting devices 21; along the second direction (for example, the horizontal direction OB), the distance D2 between the adjacent first light-emitting devices 21 and the second light-emitting devices 22 arranged at the junction of the peripheral area ZB and the middle area is equal to the distance D1 between the two adjacent first light-emitting devices 21.

[0114] It should be noted that the embodiments of the present application provide Fig.10 In the figure, it is drawn as an example that along the first direction (for example, the vertical direction OA), the distance D2' between the adjacent first light-emitting devices 21 and the second light-emitting devices 22 arranged at the boundary between the peripheral area ZB and the middle area is equal to the distance D1' between the two adjacent first light-emitting devices 21; along the second direction (for example, the horizontal direction OB), the distance D2 between the adjacent first light-emitting devices 21 and the second light-emitting devices 22 arranged at the boundary between the peripheral area ZB and the middle area is equal to the distance D1 between the two adjacent first light-emitting devices 21.

[0115] In an embodiment of the present application, in the light-emitting substrate, along a first direction (for example, a vertical direction OA), a distance D2' between adjacent first light-emitting devices 21 and second light-emitting devices 22 arranged at a boundary between the peripheral area ZB and the middle area ZJ is smaller than a distance D1' between two adjacent first light-emitting devices 21; along a second direction (for example, a horizontal direction OB), a distance D2 between adjacent first light-emitting devices 21 and second light-emitting devices 22 arranged at a boundary between the peripheral area ZB and the middle area is smaller than a distance D1 between two adjacent first light-emitting devices 21; in this way, the light-emitting device 2 can be arranged as close to the middle area ZJ as possible, so that when the light-emitting substrate 100 is used in a display device, the size of the peripheral frame of the display device can be reduced as much as possible, which is conducive to the preparation of a narrow-frame display device.

[0116] In the embodiment of the present application, in the light-emitting substrate, along the first direction (for example, the vertical direction OA), the distance D2' between the adjacent first light-emitting devices 21 and the second light-emitting devices 22 arranged at the junction of the peripheral area ZB and the middle area ZJ is equal to the distance D1' between the two adjacent first light-emitting devices 21; along the second direction (for example, the horizontal direction OB), the distance D2 between the adjacent first light-emitting devices 21 and the second light-emitting devices 22 arranged at the junction of the peripheral area ZB and the middle area is equal to the distance D1 between the two adjacent first light-emitting devices 21; in this way, on the basis of improving the peripheral darkening problem, all the light-emitting devices 2 can be made to tend to be evenly distributed, which is more conducive to the preparation of the driving circuit in the light-emitting substrate 100, and can reduce the difficulty of the preparation process and reduce the cost.

[0117] In at least one embodiment of the present application, Figure 8 and Fig.10 As shown, the peripheral area ZB is only provided with the second light emitting device 22;

[0118] For example, Fig.10 As shown, along the first direction (eg, the vertical direction OA), the distance D1 ′ between two adjacent first light emitting devices 21 is less than or equal to the distance D4 ′ between two adjacent second light emitting devices 22 .

[0119] For example, Fig.10 As shown, along the second direction (eg, horizontal direction OB), the distance D1 between two adjacent first light emitting devices 21 is less than or equal to the distance D4 between two adjacent second light emitting devices 22 .

[0120] It should be noted that in the embodiments of the present application, Figure 8 and attached Fig.10In the figure, the distance D1' between two adjacent first light-emitting devices 21 along the first direction (for example, the vertical direction OA) is equal to the distance D4' between two adjacent second light-emitting devices 22; and the distance D1 between two adjacent first light-emitting devices 21 along the second direction (for example, the horizontal direction OB) is equal to the distance D4 between two adjacent second light-emitting devices 22.

[0121] In the embodiments of the present application, since the diffusion angle and diffusion distance of the second light-emitting device 22 are greater than the diffusion angle and diffusion distance of the first light-emitting device 21, it can be arranged that along the first direction (for example, the vertical direction OA), the distance D1' between two adjacent first light-emitting devices 21 is less than or equal to the distance D4' between two adjacent second light-emitting devices 22; along the second direction (for example, the horizontal direction OB), the distance D1 between two adjacent first light-emitting devices 21 is less than or equal to the distance D4 between two adjacent second light-emitting devices 22. In this way, the distribution density of the second light-emitting devices 22 located in the peripheral area ZB can be set to be less than the distribution density of the first light-emitting devices 21 located in the middle area ZJ, thereby reducing the cost of the light-emitting substrate 100.

[0122] When the brightness of the light receiving surface of the peripheral area ZB of the light-emitting substrate 100 is low and insufficient to improve the problem of dark edges, the partition control function of the light-emitting substrate 100 can be used to control the brightness of the second light-emitting device 22 in the lamp area DQ of the peripheral area ZB to be greater than or equal to the brightness of the first light-emitting device 21 in the lamp area DQ of the middle area ZJ, so as to compensate for the light loss caused by the large diffusion angle and diffusion distance of the second light-emitting device 22. When the light-emitting substrate 100 is applied to a light-emitting device, the brightness of the peripheral area ZB and the middle area ZJ corresponding to the light-emitting device tend to be consistent, thereby improving the brightness uniformity of the light emitted by the light-emitting device, thereby improving the problem of dark edges of the light-emitting device and improving the display effect.

[0123] In this specification, the reference surface and the light receiving surface both refer to the light projection surface after the light of the light emitting substrate 100 is emitted. In this specification, the reference surface and the light receiving surface are taken as the optical film layer 4 as an example for explanation.

[0124] In at least one embodiment of the present application, Fig.10 As shown, along the first direction (eg, vertical direction OA), the distance D3' between the second light emitting device 22 closest to any edge of the substrate 1 and the edge is not greater than the distance D1' between two adjacent first light emitting devices 21; Fig.10 and Fig.11As shown, along the second direction (eg, horizontal direction OB), the distance D3 between the second light emitting device 2 closest to any edge of the substrate 1 and the edge is not greater than the distance D1 between two adjacent first light emitting devices 21 .

[0125] The above “not greater than” includes the case of being less than or equal to.

[0126] Exemplarily, along the first direction (for example, the vertical direction OA), the second light-emitting device 22 closest to any edge of the substrate 1 has a distance D3' from the edge equal to the distance D1' between two adjacent first light-emitting devices 21; along the second direction (for example, the horizontal direction OB), the second light-emitting device 2 closest to any edge of the substrate 1 has a distance D3 from the edge equal to the distance D1 between two adjacent first light-emitting devices 21.

[0127] Exemplarily, along the first direction (for example, the vertical direction OA), the distance D3' between the second light-emitting device 22 closest to any edge of the substrate 1 and the edge is smaller than the distance D1' between two adjacent first light-emitting devices 21; along the second direction (for example, the horizontal direction OB), the distance D3 between the second light-emitting device 2 closest to any edge of the substrate 1 and the edge is smaller than the distance D1 between two adjacent first light-emitting devices 21.

[0128] In the light-emitting substrate 100 provided in the embodiment of the present application, the second light-emitting device 22 is arranged along the first direction (for example, the vertical direction OA), and the distance D3' between the second light-emitting device 22 and any edge of the substrate 1 is not greater than the distance D1' between two adjacent first light-emitting devices 21; along the second direction (for example, the horizontal direction OB), the distance D3 between the second light-emitting device 2 and any edge of the substrate 1 is not greater than the distance D1 between two adjacent first light-emitting devices 21; in this way, the distance between the light-emitting device 2 and the edge of the substrate 1 can be made relatively small, which is more conducive to the preparation of narrow-frame products.

[0129] In at least one embodiment of the present application, in combination Fig.10 and Fig.11 As shown, along the horizontal direction OB, the distance D5 between the center of the second light-emitting device 22 closest to any edge of the substrate 1 and the edge is less than or equal to half D6 of the planar size of the light-emitting area EA-22 of the second light-emitting device 22 on the reference surface (e.g., the surface of the optical film layer 4 close to the substrate 1) along the horizontal direction OB. The center of the second light-emitting device 22 refers to the geometric center of the light-emitting device.

[0130] In at least one embodiment of the present application, in the vertical direction OA, the distance between the center of the second light-emitting device 22 closest to any edge of the substrate 1 and the edge is less than or equal to half of the planar size of the light-emitting area EA-22 of the second light-emitting device 22 on the reference plane (for example, the surface of the optical film layer 4 close to the substrate 1) in the horizontal direction OB.

[0131] In an embodiment of the present application, the center of the second light-emitting device 22 closest to any edge of the substrate 1 is set so that the distance D5 between the center and the edge is less than or equal to half the plane size D6 of the light-emitting area EA-22 of the second light-emitting device 22 on the reference surface (for example, the surface of the optical film layer 4 close to the substrate 1) in the horizontal direction OB. In this way, the light emitted by the second light-emitting device 2 closest to the edge of the light-emitting substrate 100 can be projected onto the edge of the reference surface. When the light-emitting substrate 100 is applied to a light-emitting device, the brightness of the edge of the light-emitting device can be improved, and the brightness uniformity of the light emitted by the light-emitting device can be improved, thereby improving the problem of dark edges of the light-emitting device and improving the display effect.

[0132] In at least one embodiment of the present application, the brightness of the peripheral area is greater than or equal to 70% of the brightness of the middle area.

[0133] It should be noted that the brightness of the peripheral area ZB and the brightness of the middle area ZJ refer to average brightness.

[0134] Exemplarily, the brightness of the peripheral area ZB is greater than or equal to 70% to 90% of the brightness of the middle area ZJ; for example, the brightness of the peripheral area ZB is 75%, 80%, 85%, 88%, 90%, 92%, 94%, or 95% of the brightness of the middle area ZJ.

[0135] In at least one embodiment of the present application, in combination Fig.17 , Fig.18 and Fig.19 As shown, the brightness difference between the peripheral area ZB and the middle area ZJ is less than 0.04*10 7 Lux.

[0136] in, Fig.17 A top view structural diagram of a display screen of a light-emitting device prepared using a light-emitting substrate provided in the present application; Fig.18 for Fig.17 The brightness curve tested along the horizontal direction of the display screen, Fig.19 for Fig.17 The brightness curve tested along the vertical direction of the display screen.

[0137] Fig.14 A top view of a display screen of a light-emitting device prepared by a light-emitting substrate in the related art is provided. Fig.15 for Fig.14 The brightness curve tested along the horizontal direction of the display screen, Fig.16 for Fig.14 The brightness curve tested along the vertical direction of the display screen.

[0138] Combination Fig.14 , Fig.15 and Fig.16 It can be seen that the edge of the display screen of the light-emitting device prepared by the light-emitting substrate in the related art has an obvious darkening phenomenon, and the brightness difference between the middle and the edge of the display screen is 0.05*10 7 Lux or so; in contrast, combined Fig.17 , Fig.18 and Fig.19 It can be seen that the darkening phenomenon at the edge of the display screen of the light-emitting device prepared by the light-emitting substrate provided in the present application is significantly improved, and the brightness difference between the middle and the edge of the display screen is less than 0.04*10 7 Lux.

[0139] In at least one embodiment of the present application, Figure 8 and Fig.10 As shown, only the second light-emitting device 22 is arranged in the peripheral area ZB, and only the first light-emitting device 21 is arranged in the middle area ZJ. The peripheral area ZB and the middle area ZJ respectively include an integer number of light zones DQ, and each light zone DQ includes a*b electrically connected light-emitting devices 2, wherein a and b are both positive integers.

[0140] It can be understood that when only the second light-emitting device 22 is provided in the peripheral area ZB, and only the first light-emitting device 21 is provided in the middle area ZJ, and the peripheral area ZB and the middle area ZJ respectively include an integer number of light zones DQ, the first light-emitting device 21 and the second light-emitting device 22 are respectively located in different light zones DQ.

[0141] In an exemplary embodiment, the light-emitting substrate 100 further includes a plurality of micro-driving chips, including a first micro-driving chip and a second micro-driving chip, the first micro-driving chip is electrically connected to the first light-emitting device 21 , and the second micro-driving chip is electrically connected to the second light-emitting device 22 .

[0142] In the light-emitting substrate provided in the embodiment of the present application, the first light-emitting device 21 and the second light-emitting device 22 are independently controlled respectively, that is, the first light-emitting device 21 is controlled by the first micro-driving chip, and the second light-emitting device 22 is controlled by the second micro-driving chip. In this way, the first light-emitting device 21 and the second light-emitting device 22 can be independently controlled, and the brightness of the second light-emitting device 22 in a circle of light areas DQ set near the edge of the light-emitting substrate 100 is controlled by two micro-driving chips (the first micro-driving chip and the second micro-driving chip) to be greater than the brightness of other first light-emitting devices 21. Therefore, when the light-emitting substrate 100 is applied to a light-emitting device, the brightness of the edge of the light-emitting device can be further improved, and the brightness uniformity of the light emitted by the light-emitting device can be improved, thereby improving the problem of dark edges and improving the display effect.

[0143] In an exemplary embodiment, Figure 8 As shown, one lamp zone DQ includes one light emitting device 2 , and in the peripheral area ZB, all the light emitting devices 2 in a circle of lamp zones DQ arranged close to the edge of the light emitting substrate 100 are second light emitting devices 22 .

[0144] In at least one embodiment of the present application, Fig.10 As shown, all the light emitting devices 2 in at least one circle of light zones DQ arranged near the edge of the light emitting substrate 100 are second light emitting devices 22. "At least one circle of light zones" includes one circle of light zones DQ and two or more circles of light zones DQ.

[0145] In the embodiment of the present application, all the light-emitting devices 2 in at least one circle of light zones DQ arranged near the edge of the light-emitting substrate 100 are second light-emitting devices 22. In this way, all the light-emitting devices 2 in a circle of light zones DQ arranged near the edge of the light-emitting substrate 100 can be second light-emitting devices 22, that is, the light-emitting devices 2 in the same light zone DQ are all second light-emitting devices 22. Since the light-emitting devices 2 in the same light zone DQ are controlled and driven at the same time, the partitioned control and driving of the light zone DQ in the light-emitting substrate 100 is facilitated.

[0146] In an exemplary embodiment, when all the light-emitting devices 2 in a circle of light areas DQ set near the edge of the light-emitting substrate 100 are second light-emitting devices 22, the zoning control function of the light-emitting substrate 100 can be used to control the brightness of the second light-emitting devices 22 in a circle of light areas DQ set near the edge of the light-emitting substrate 100 to be greater than the brightness of other first light-emitting devices 21. Therefore, when the light-emitting substrate 100 is applied to a light-emitting device, the brightness of the edge of the light-emitting device can be further improved, and the brightness uniformity of the light emitted by the light-emitting device can be improved, thereby improving the problem of dark edges and improving the display effect.

[0147] In at least one embodiment of the present application, Fig. 9B As shown, only the second light emitting device 22 is arranged in the peripheral area ZB, and only the first light emitting device 21 is arranged in the middle area ZJ; the number of light zones DQ included in the peripheral area ZB and the middle area ZJ is a non-integer.

[0148] Each lamp area DQ includes a*b electrically connected light-emitting devices 2, wherein a and b are both positive integers.

[0149] It can be understood that when only the second light emitting device 22 is provided in the peripheral area ZB, and only the first light emitting device 21 is provided in the middle area ZJ, the peripheral area ZB and the middle area ZJ may respectively include a non-integer number of light zones DQ. Fig. 9B As shown, there is a partial light zone DQ including both the first light emitting device 21 and the second light emitting device 22. For example, Fig. 9B As shown, in a circle of light zones DQ arranged near the edge of the light-emitting substrate 100, the light-emitting devices 2 in the first row, the second row, the last row and the second last row are all second light-emitting devices 22, that is, the light-emitting devices 2 in the first row of light zones DQ and the last row of light zones DQ are all second light-emitting devices 22; the light-emitting devices 2 in other light zones DQ in the peripheral area ZB except the first row of light zones DQ and the last row of light zones DQ may include either first light-emitting devices 21 or second light-emitting devices 22.

[0150] In practical applications, in the case where the same light zone DQ includes both the first light emitting device 21 and the second light emitting device 22, different driving channels can be set in the micro-driving chip corresponding to the same light zone DQ to provide different currents to the first light emitting device 21 and the second light emitting device 22 in the same light zone DQ, thereby realizing independent control of the first light emitting device 21 and the second light emitting device 22 in the same light zone DQ. In this way, the brightness of the second light emitting device 22 in the same light zone DQ can be controlled to be greater than the brightness of the first light emitting device 21, so that when the light emitting substrate 100 is applied to a light emitting device, the brightness of the edge of the light emitting device can be further improved, and the brightness uniformity of the light emitted by the light emitting device can be improved, thereby improving the problem of dark edges and improving the display effect.

[0151] In at least one embodiment of the present application, the light-emitting substrate 100 includes N*M lamp zones DQ, each lamp zone DQ includes a*b electrically connected light-emitting devices 2; in the middle area ZJ, a first micro-driving chip is electrically connected to all first light-emitting devices 21 in at least one lamp zone DQ; N≥10, M≥10, 1≤a≤5, 1≤b≤5.

[0152] Exemplarily, each lamp zone DQ includes a*b electrically connected light emitting devices 2;

[0153] For example, each lamp area DQ includes: 1*1 light emitting device 2, 1*2 electrically connected light emitting devices 2, 2*2 electrically connected light emitting devices 2, 3*3 electrically connected light emitting devices 2, 4*4 electrically connected light emitting devices 2, 4*5 electrically connected light emitting devices 2 or 5*5 electrically connected light emitting devices 2. The "electrical connection" includes electrical connection modes of series connection, parallel connection and combination of series and parallel connection.

[0154] In an exemplary embodiment, the light-emitting substrate 100 may further include a buffer layer, a first conductive layer, an interlayer dielectric layer and a reflective layer 5 which are sequentially stacked on the substrate 1; wherein the interlayer dielectric layer includes a first insulating layer and a first flat layer, and the first conductive layer is used to form a conductive pattern. When there is enough space on the substrate 1 to arrange all the conductive patterns, the light-emitting substrate may include only one conductive layer.

[0155] Exemplarily, the material of the first conductive layer may include any one of copper, aluminum, nickel, molybdenum and titanium, or a combination of several metals stacked together.

[0156] For example, the first conductive layer may include a molybdenum nickel titanium alloy (MoNiTi) layer, a copper metal layer, and a molybdenum niobium alloy (MoNb) layer stacked in sequence. The molybdenum nickel titanium alloy layer can increase the nucleation density of copper metal grains in the electroplating process, and the molybdenum niobium alloy layer plays a role in preventing copper metal oxidation. The thickness of the molybdenum nickel titanium alloy layer in the first conductive layer can range from For example, the thickness can be or

[0157] Exemplarily, the thickness of the first conductive layer may range from 1.5 μm to 7 μm, for example, the thickness may be 1.5 μm, 2 μm, 4 μm, 6.5 μm or 7 μm.

[0158] In an exemplary embodiment, the light-emitting substrate may further include a buffer layer, a second conductive layer, a second insulating layer, a second flat layer, a third insulating layer, a first conductive layer, an interlayer dielectric layer and a reflective layer 5 which are sequentially stacked on the substrate 1; the first conductive layer and the second conductive layer together constitute a conductive pattern. The first conductive layer is arranged farther away from the substrate 1 than the second conductive layer.

[0159] Exemplarily, the material of the second conductive layer may include any one of copper, aluminum, nickel, molybdenum and titanium, or a combination of several metals stacked together.

[0160] For example, the second conductive layer may include a molybdenum-niobium alloy layer, a copper metal layer and a protective layer stacked in sequence, and the protective layer may include any one of copper-nickel alloy (CuNi), nickel or indium tin oxide (ITO). The molybdenum-niobium alloy layer serves to improve the adhesion between the copper metal and the film layer close to the substrate, and the protective layer serves to prevent the copper metal from being oxidized.

[0161] Exemplarily, the thickness of the second conductive layer may be in a range of 0.5-10 μm, for example, the thickness may be 0.5 μm, 1 μm, 1.8 μm, 2.7 μm or 10 μm.

[0162] In some embodiments, the light emitting substrate 100 may further include: Fig.12 The multiple support columns 6 shown in the figure are located on the side of the reflective layer 5 away from the substrate 1, and the orthographic projection of the support columns 6 on the substrate 1 does not overlap with the orthographic projection of the light emitting device 2 on the substrate 1.

[0163] It should be noted that the color of the support column 6 can be selected as needed. For example, the color of the support column 6 can be white, so that the reflectivity of the support column 6 is close to the reflectivity of the reflective layer 5. For another example, the support column 6 can be transparent.

[0164] The embodiment of the present application provides a light emitting device, such as Fig.12 As shown, it includes the light emitting substrate 100 as described above.

[0165] The film layers and components specifically included in the above-mentioned light-emitting substrate 100 can be referred to the above description, which will not be repeated here.

[0166] In some embodiments, the light emitting device may further include a protective substrate (or cover) covering the light emitting substrate 100 .

[0167] The light-emitting device can be used as a backlight device, or can also be used as a display device. Specifically, if the multiple light-emitting devices 2 in the light-emitting device are all light-emitting devices that emit light of a single color, the light-emitting device can be used as a backlight device; if the multiple light-emitting devices 2 in the light-emitting device include light-emitting devices that emit light of different colors, such as three light-emitting devices that emit red light, green light, and blue light, the light-emitting device can be used as a display device.

[0168] In some embodiments, when the light emitting substrate 100 is used in a display device, the support column 6 may not be provided in the light emitting substrate 100 .

[0169] In at least one embodiment of the present application, Fig.12As shown, the light emitting device further includes a diffuser plate 41 , a quantum dot film 42 , a diffuser sheet 43 and a composite film 44 which are stacked in sequence; wherein the diffuser plate 41 is located at the light emitting side of the light emitting substrate 100 .

[0170] Among them, multiple support columns 6 are used to support multiple optical film layers 4 (including a diffuser plate 41, a quantum dot film 42, a diffuser 43 and a composite film 44), so that there is a light mixing distance between the reflective layer 5 in the light-emitting substrate 100 and the optical film layer, which can improve the light shadow produced by the light-emitting substrate and improve the display quality of the light-emitting device.

[0171] In some embodiments, the material of the diffuser 41 may include any one of glass, polystyrene (PS), polycarbonate (PC), polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyethylene terephthalate (PET), acrylic (PMMA), and acrylic acid (MMA).

[0172] Specifically, the quantum dot film 42 (QD Enhancement Films, referred to as QDEF) is a technology that mixes quantum dot phosphor and polymer evenly to form a film. For example, the material of the quantum dot film 42 may include perovskite quantum dot material, and its thickness is generally about 100um.

[0173] In some embodiments, the material of the diffusion sheet 43 may be the same as that of the diffusion plate 41 .

[0174] In some embodiments, the composite film 44 is used to improve the light efficiency and also serves as a protective film for the diffuser plate 41 , the quantum dot film 42 and the diffuser sheet 43 , protecting them from scratches or damages.

[0175] The embodiment of the present application provides a display device, such as Fig.13 As shown, the display device includes a display panel 200 and the aforementioned light-emitting device, the display panel 200 is located at the light-emitting side of the light-emitting device, and the colors of the lights emitted by all the light-emitting devices 2 in the light-emitting device are the same.

[0176] The above-mentioned display panel 200 can be a liquid crystal display panel (Liquid Crystal Display, LCD). Exemplarily, the liquid crystal display panel can include a twisted nematic (Twisted Nematic, TN) type, a vertical alignment (Vertical Alignment, VA) type, an in-plane switching (In Plane Switching, IPS) type and an advanced super dimensional field switch (ADS, Advanced Super Dimension Switch) type.

[0177] In the display device provided in the embodiment of the present application, the light emitting device 2 includes a first light emitting device 21 and a second light emitting device 22, and the half-power angle of the second light emitting device 22 is configured to be greater than the half-power angle of the first light emitting device 21; and only the first light emitting device 21 is provided in the middle area ZJ of the substrate 1 of the light emitting substrate 100, and at least one second light emitting device 22 is provided in the peripheral area ZB. In this way, the brightness of the edge of the light emitting device can be improved, and the brightness uniformity of the light emitted by the light emitting device can be improved, thereby improving the problem of dark edges and improving the display effect.

[0178] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A light-emitting substrate, in, include: a substrate comprising a middle region and a peripheral region surrounding the middle region; A plurality of light-emitting devices arranged in an array on the substrate; Wherein, the light emitting device comprises a first light emitting device and a second light emitting device; a half power angle of the second light emitting device is configured to be greater than a half power angle of the first light emitting device; The middle area is only provided with the first light emitting device, and the peripheral area is provided with at least one second light emitting device.

2. The light-emitting substrate according to claim 1, in, The peripheral area has a closed outline; the size of the middle area along the first direction is X times the size of the peripheral area along the first direction, the size of the middle area along the second direction is X times the size of the peripheral area along the second direction, the first direction and the second direction intersect, and the value range of X is 7 to 8.

3. The light-emitting substrate according to claim 2, in, The peripheral area is provided with only the second light-emitting devices, and along the first direction, the distance between two adjacent first light-emitting devices is greater than or equal to the distance between two adjacent second light-emitting devices; Along the second direction, a distance between two adjacent first light emitting devices is greater than or equal to a distance between two adjacent second light emitting devices.

4. The light-emitting substrate according to claim 3, in, Along the first direction, the distance between the adjacent first light emitting devices and the second light emitting devices is less than or equal to the distance between two adjacent first light emitting devices; Along the second direction, a distance between adjacent first light emitting devices and second light emitting devices is less than or equal to a distance between two adjacent first light emitting devices.

5. The light-emitting substrate according to claim 2, in, The peripheral area is provided with only the second light-emitting devices, and along the first direction, the distance between two adjacent first light-emitting devices is less than or equal to the distance between two adjacent second light-emitting devices; Along the second direction, a distance between two adjacent first light emitting devices is less than or equal to a distance between two adjacent second light emitting devices.

6. The light-emitting substrate according to claim 3 or 5, in, Along the first direction, the distance between the second light-emitting device closest to any edge of the substrate and the edge is not greater than the distance between two adjacent first light-emitting devices; along the second direction, the distance between the second light-emitting device closest to any edge of the substrate and the edge is not greater than the distance between two adjacent first light-emitting devices.

7. The light-emitting substrate according to any one of claims 2 to 5, in, The brightness of the peripheral area is greater than or equal to 70% of the brightness of the middle area.

8. The light-emitting substrate according to claim 7, in, The brightness difference between the peripheral area and the middle area is less than 0.04*10 7 Lux.

9. The light-emitting substrate according to claim 6, in, The peripheral area and the middle area respectively include an integer number of light zones, and each of the light zones includes a*b electrically connected light-emitting devices, wherein a and b are both positive integers.

10. The light-emitting substrate according to claim 6, in, The number of lamp zones included in the peripheral area and the middle area is non-integer, and each of the lamp zones includes a*b electrically connected light-emitting devices, wherein a and b are both positive integers.

11. A light emitting device, in, It comprises the light emitting substrate as claimed in any one of claims 1 to 10.

12. The light emitting device according to claim 11, in, The light emitting device further comprises a diffusion plate, a quantum dot film, a diffusion sheet and a composite film which are stacked in sequence; Wherein, the diffusion plate is located on the light emitting side of the light emitting substrate.

13. A display device, in, It comprises a display panel and the light-emitting device as claimed in claim 11 or 12, wherein the display panel is located at the light-emitting side of the light-emitting device, and the light emitted by all the light-emitting devices in the light-emitting device has the same color.

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