Light-emitting substrate and display device

Abstract

The present application provides a light-emitting substrate and a display device, which includes a driving substrate, a light-guiding functional layer and a reflective layer. The driving substrate is provided with multiple light-emitting devices and multiple support columns. The light-guiding functional layer is arranged on the side of each support column away from the driving substrate. The reflective layer is arranged on the driving substrate and is located between the light-emitting devices. The reflective layer includes a reflective body and multiple low-reflective units. A low-reflective unit is arranged around a support column, and the reflectivity of the reflective layer at the reflective body position is greater than the reflectivity of the reflective layer at the low-reflective unit position; by dividing the reflective layer into a reflective body and multiple low-reflective units, a low-reflective unit is arranged around a support column, and the reflectivity of the reflective layer at the reflective body position is greater than the reflectivity of the reflective layer at the low-reflective unit position, thereby reducing the reflectivity of the reflective layer near the support column, avoiding light concentration at the support column position, and causing uneven light output of the light-emitting substrate, thereby ensuring the uniformity of light output of the light-emitting substrate.

Description

Technical Field

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

[0002] With the development of display technology, the technology of using mini light emitting diodes (Mini Light Emitting Diode, MiniLED) as display light emitting devices has attracted widespread attention.

[0003] At present, the Mini LED light-emitting substrate mainly includes a lamp board, a light-guiding film layer such as a diffuser, and a support member located between the lamp board and the diffuser. When the Mini LED emits light, light is reflected between the reflective film layer on the lamp board and the support member, causing light to gather near the support member, resulting in uneven brightness of the light output from the Mini LED light-emitting substrate. Summary of the Invention

[0004] The purpose of the present application is to provide a light-emitting substrate and a display device for solving the technical problem of uneven brightness of light emitted by the light-emitting substrate.

[0005] In order to solve the above problems, the present application provides a light-emitting substrate, comprising:

[0006] a driving substrate, wherein a plurality of light-emitting devices are provided on the driving substrate;

[0007] A plurality of support columns are arranged on the driving substrate at intervals and located between the light emitting devices;

[0008] a light-guiding functional layer, disposed on a side of each of the support pillars away from the driving substrate;

[0009] a reflective layer, disposed on the driving substrate and located between the light-emitting devices;

[0010] The reflective layer includes a reflective body and a plurality of low-reflective units, one of the low-reflective units is arranged around one of the support columns, and the reflectivity of the reflective layer at the reflective body position is greater than the reflectivity of the reflective layer at the low-reflective unit position.

[0011] In the light-emitting substrate provided in the embodiment of the present application, the low-reflection unit includes an opening located in the reflective layer, and the depth of the opening is equal to the thickness of the reflective layer.

[0012] In the light-emitting substrate provided in the embodiment of the present application, the low-reflection unit includes an opening located in the reflective layer and a low-reflection portion located in the opening, the depth of the opening is less than or equal to the thickness of the reflective layer, and the reflectivity of the reflective body is greater than the reflectivity of the low-reflection portion.

[0013] In the light-emitting substrate provided in the embodiment of the present application, the depth of the opening is zero.

[0014] In the light-emitting substrate provided in the embodiment of the present application, the opening is arranged in a ring shape around the supporting column.

[0015] In the light-emitting substrate provided in the embodiment of the present application, the opening includes a plurality of sub-openings arranged around the supporting column.

[0016] In the light-emitting substrate provided in the embodiment of the present application, in one of the supporting pillars and the corresponding plurality of sub-openings, the opening widths of the sub-openings gradually decrease in a direction away from the supporting pillar.

[0017] In the light-emitting substrate provided in the embodiment of the present application, the material of the low-reflective portion is ink.

[0018] In the light-emitting substrate provided in the embodiment of the present application, the reflective layer includes a plurality of through holes, and one end of the support column away from the light-guiding functional layer passes through one of the through holes and is connected to the driving substrate;

[0019] The low-reflection unit is spaced apart from the through hole, and the distance between the low-reflection unit and the through hole is greater than or equal to 1.5 mm.

[0020] In the light-emitting substrate provided in the embodiment of the present application, in one of the support columns and a corresponding one of the low-reflection units, the distance between the low-reflection unit and the support column is smaller than the distance between the low-reflection unit and any of the light-emitting units.

[0021] In the light-emitting substrate provided in the embodiment of the present application, the distance between the driving substrate and the light-guiding functional layer is 2 mm to 10 mm.

[0022] The present application also provides a display device, comprising the light-emitting substrate as described in any of the previous embodiments, and a display panel arranged on the light-emitting side of the light-emitting substrate.

[0023] The beneficial effect of the present application is that by dividing the reflective layer into a reflective body and multiple low-reflective units, one of the low-reflective units is arranged around one of the support columns, and the reflectivity of the reflective layer at the reflective body position is greater than the reflectivity of the reflective layer at the low-reflective unit position, thereby reducing the reflectivity of the reflective layer near the support column, avoiding light concentration at the support column position and causing uneven light output from the light-emitting substrate, thereby ensuring the uniformity of light output from the light-emitting substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings will make the technical solutions and other beneficial effects of the present application apparent.

[0025] Figure 1This is a schematic diagram of the first film layer structure of the light-emitting substrate in an embodiment of the present application;

[0026] Figure 2 This is a schematic diagram of the second film layer structure of the light-emitting substrate in an embodiment of the present application;

[0027] Figure 3 This is a schematic diagram of the third film layer structure of the light-emitting substrate in the embodiment of the present application;

[0028] Figure 4 This is a first top view of the light-emitting substrate in an embodiment of the present application;

[0029] Figure 5 This is a second top view of the light-emitting substrate in the embodiment of the present application;

[0030] Figure 6 This is a third top view of the light-emitting substrate in the embodiment of the present application. DETAILED DESCRIPTION

[0031] 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 embodiments described 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 making creative efforts are within the scope of protection of this application.

[0032] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0033] The technical solution of this application is now described in conjunction with specific embodiments.

[0034] This application provides a light-emitting substrate. Figures 1 to 6 , the light-emitting substrate comprises:

[0035] A driving substrate 100 , on which a plurality of light-emitting devices 200 are provided;

[0036] A plurality of support columns 300 are arranged on the driving substrate 100 at intervals and located between the light emitting devices 200;

[0037] The light guide functional layer 400 is disposed on a side of each of the support pillars 300 away from the driving substrate 100 ;

[0038] The reflective layer 500 is disposed on the driving substrate 100 and located between the light emitting devices 200 ;

[0039] The reflective layer 500 includes a reflective body 510 and a plurality of low-reflective units 520. Each low-reflective unit 520 is disposed around a support column 300, and the reflectivity of the reflective layer 500 at the reflective body 510 is greater than the reflectivity of the reflective layer 500 at the low-reflective unit 520. The comparison of the reflectivity at the reflective body 510 and the reflectivity at the low-reflective unit 520 is performed on the assumption that the wavelength and angle of incident light incident on the reflective body 510 and the low-reflective unit 520 are the same.

[0040] It can be understood that, at present, the Mini LED light-emitting substrate mainly includes a lamp board, a light-guiding film layer such as a diffuser plate, and a support member located between the lamp board and the diffuser plate. When the Mini LED emits light, light is concentrated near the support member due to the influence of light reflection between the reflective film layer on the lamp board and the support member, resulting in uneven brightness of the light output of the Mini LED light-emitting substrate. In this embodiment, the reflective layer 500 is divided into a reflective body 510 and a plurality of low-reflection units 520, one of the low-reflection units 520 is arranged around the support column 300, and the reflectivity of the reflective layer 500 at the position of the reflective body 510 is greater than the reflectivity of the reflective layer 500 at the position of the low-reflection unit 520, thereby reducing the reflectivity of the reflective layer 500 near the support column 300, avoiding light concentration at the position of the support column 300, and causing uneven brightness of the light output of the light-emitting substrate, thereby ensuring the uniformity of the light output of the light-emitting substrate.

[0041] It should be noted that, in this embodiment, the light-guiding functional layer 400 may include a diffusion plate, and the distance between the driving substrate and the light-guiding functional layer may be adjusted according to actual needs to avoid light concentration at the position of the support column 300 of the light-emitting substrate, resulting in uneven light output, thereby ensuring the uniformity of the light output of the light-emitting substrate. Specifically, the distance between the driving substrate and the light-guiding functional layer is 2 mm to 10 mm, so that the brightness difference between the light emitted by the light-emitting substrate at the position of the support column 300 and the light emitted at other positions is minimized, so that the uniformity of the light output of the light-emitting substrate is maximized.

[0042] In one embodiment, see Figure 1 and Figure 4 The low-reflection unit 520 includes an opening 521 located in the reflective layer 500 , and the depth of the opening 521 is equal to the thickness of the reflective layer 500 .

[0043] It can be understood that the low-reflection unit 520 includes an opening 521 located at the reflective layer 500. Under the condition that the depth of the opening 521 is equal to the thickness of the reflective layer 500, the driving substrate 100 is exposed at the position of the opening 521. Obviously, the reflectivity of the reflective body 510 is greater than the reflectivity of the driving substrate 100, so that the reflectivity of the reflective layer 500 at the position of the reflective body 510 is greater than the reflectivity of the reflective layer 500 at the position of the low-reflection unit 520, thereby avoiding the problem of uneven brightness of the light output of the light-emitting substrate due to light concentration at the support column 300.

[0044] In one embodiment, see Figure 2 、 Figure 3 、 Figure 5 and Figure 6 The low-reflection unit 520 includes an opening 521 located in the reflective layer 500 and a low-reflection portion 522 located in the opening 521. The depth of the opening 521 is less than or equal to the thickness of the reflective layer 500. The reflectivity of the reflective body 510 is greater than the reflectivity of the low-reflection portion 522.

[0045] It can be understood that the low-reflection unit 520 includes an opening 521 located in the reflective layer 500 and a low-reflection portion 522 located in the opening 521, and the reflectivity of the reflective body 510 is greater than the reflectivity of the low-reflection portion 522. By filling the opening 521 with the low-reflection portion 522 having a reflectivity lower than that of the reflective body 510, the reflectivity of the reflective layer 500 at the reflective body 510 is greater than the reflectivity of the reflective layer 500 at the low-reflection unit 520, thereby avoiding the occurrence of the reflection of the reflective layer 500 at the low-reflection unit 520. Light is concentrated at the position of the support column 300, resulting in uneven brightness of the light emitted by the light-emitting substrate; in this embodiment, the depth of the opening 521 can be less than the thickness of the reflective layer 500, and can be equal to the thickness of the reflective layer 500. The opening 521 can be filled by the low-reflective portion 522, and the surface of the low-reflective portion 522 away from the driving substrate 100 can be coplanar with the surface of the reflective body 510 away from the driving substrate 100, thereby ensuring the flatness of the reflective layer 500.

[0046] As mentioned above, in this embodiment, the material of the low-reflective portion 522 is ink. Obviously, the reflectivity of the ink selected in this embodiment is lower than the reflectivity of the reflective body 510, and during the specific production, ink can be applied at the position of the opening 521 to form the low-reflective portion 522. On the basis of ensuring the flatness of the reflective layer 500, the production cost of the low-reflective portion 522 is also reduced. Specifically, the material of the low-reflective portion 522 can be selected from inks of different colors according to specific needs. The material of the low-reflective portion 522 can be gray ink, brown ink, black ink, etc.

[0047] In another embodiment, the light emitting substrate and Figure 3 The structures of the light-emitting substrates shown are substantially the same, except that the depth of the opening 521 is zero, that is, the low-reflection unit 520 directly covers the reflective layer 500, and no opening 521 is provided at the position where the low-reflection unit 520 covers the reflective layer 500; the low-reflection unit 520 may be a coating, and the material of the coating may be ink having a reflectivity lower than that of the reflective body 510.

[0048] In one embodiment, see Figure 6 The opening 521 is arranged in a ring shape around the support column 300.

[0049] It can be understood that the opening 521 can be arranged in a ring shape around the support column 300, so that the reflectivity of the reflective layer 500 around the support column 300 can be reduced from all angles, so that the overall brightness around the support column 300 is reduced more evenly, and the problem of inconsistent brightness reduction around the support column 300 can be avoided. In this embodiment, the shape of the ring-shaped opening 521 can match the shape of the support column 300, and can be located at any position.

[0050] In one embodiment, see Figure 4 and Figure 5 The opening 521 includes a plurality of sub-openings 5211 arranged around the support column 300 .

[0051] It can be understood that the opening 521 includes a plurality of sub-openings 5211 arranged around the support column 300, and the plurality of sub-openings 5211 are evenly arranged around the support column 300, and the spacing between any two adjacent sub-openings 5211 is equal, so that the overall brightness around the support column 300 is reduced more evenly. In this embodiment, by setting the opening 521 to include a plurality of sub-openings 5211 arranged around the support column 300, when the depth of the opening 521 is equal to the depth of the reflective layer 500, the opening 521 is prevented from being ring-shaped and dividing the reflective layer 500 into multiple separate parts, thereby ensuring the integrity of the reflective layer 500.

[0052] As described above, in this embodiment, among the plurality of sub-openings 5211 corresponding to a support column 300 , the area of ​​the sub-opening 5211 gradually decreases in a direction away from the support column 300 .

[0053] It can be understood that the opening 521 is divided into a plurality of sub-openings 5211 arranged around the support column 300, so that each sub-opening 5211 can adjust the shape of the sub-opening 5211 according to the actual light brightness needs. In this embodiment, in one of the support columns 300 and the corresponding plurality of sub-openings 5211, the opening width of the sub-opening 5211 gradually decreases in the direction away from the support column 300. Obviously, in the direction away from the support column 300, the light gathered around the support column 300 gradually decreases. By gradually reducing the opening width of the sub-opening 5211 in the direction away from the support column 300, the light-emitting substrate can ensure the uniformity of the overall light output of the light-emitting substrate on the basis of reducing the light output brightness at the position of the support column 300.

[0054] In one embodiment, see Figures 1 to 6 The reflective layer 500 includes a plurality of through holes 530 , and one end of the support column 300 away from the light guide functional layer 400 passes through one of the through holes 530 and is connected to the driving substrate 100 ;

[0055] The low-reflection unit 520 and the through hole 530 are spaced apart, and the distance between the low-reflection unit 520 and the through hole 530 is greater than or equal to 1.5 mm.

[0056] It can be understood that the reflective layer 500 includes a plurality of through holes 530, and one end of the support column 300 away from the light-guiding functional layer 400 passes through the through hole 530 to be connected to the driving substrate 100. In one of the support columns 300 and the corresponding through hole 530, the diameter of the through hole 530 is greater than the diameter of the support column 300, and the low-reflection unit 520 is spaced apart from the through hole 530, that is, the opening 521 of the low-reflection unit 520 is spaced apart from the through hole 530. Obviously, the opening 521 is spaced apart from the through hole 530, and the distance between the low-reflection unit 520 and the through hole 530 is greater than or equal to 1.5 mm, so as to avoid the opening 521 and the through hole 530 being close to each other, thereby increasing the process difficulty of making the opening 521 and the through hole 530 on the reflective layer 500.

[0057] In one embodiment, see Figures 1 to 6 In one of the support columns 300 and the corresponding low-reflection unit 520 , the distance between the low-reflection unit 520 and the support column 300 is smaller than the distance between the low-reflection unit 520 and any of the light-emitting units.

[0058] It can be understood that, in one of the support columns 300 and the corresponding low-reflection units 520, the distance between the low-reflection unit 520 and the support column 300 is smaller than the distance between the low-reflection unit 520 and any of the light-emitting units. By setting the distance between the low-reflection unit 520 and the support column 300 to be smaller than the distance between the low-reflection unit 520 and any of the light-emitting units, the influence of the low-reflection unit 520 on the light emission of the light-emitting substrate at the position of each of the light-emitting devices 200 can be reduced, so that the light-emitting substrate can avoid light concentration at the position of the support column 300, resulting in uneven light emission of the light-emitting substrate, while maximizing the reduction of the influence on the light emission brightness of the light-emitting substrate at the position of each of the light-emitting devices 200.

[0059] The present application also provides a display device, comprising a light-emitting substrate as described in any of the previous embodiments, and a display panel arranged on the light-emitting side of the light-emitting substrate. The specific structure of the light-emitting substrate can be found in the previous embodiments and will not be repeated here. It should be noted that the light-emitting substrate can be used for display alone or as a backlight module of a display device. In this embodiment, the display panel is a liquid crystal display panel, and the light-emitting substrate is arranged on the light-incident side of the display panel as a backlight module.

[0060] The present application provides a light-emitting substrate by dividing a reflective layer 500 into a reflective body 510 and a plurality of low-reflective units 520, wherein one of the low-reflective units 520 is arranged around a support column 300, and the reflectivity of the reflective layer 500 at the position of the reflective body 510 is greater than the reflectivity of the reflective layer 500 at the position of the low-reflective unit 520, thereby reducing the reflectivity of the reflective layer 500 near the support column 300, avoiding light concentration at the position of the support column 300 and causing uneven light output of the light-emitting substrate, thereby ensuring the uniformity of light output from the light-emitting substrate.

[0061] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0062] The above is a detailed introduction to the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A light-emitting substrate, characterized in that: include: a driving substrate, wherein a plurality of light-emitting devices are provided on the driving substrate; A plurality of support columns are arranged on the driving substrate at intervals and located between the light emitting devices; a light-guiding functional layer, disposed on a side of each of the support pillars away from the driving substrate; a reflective layer, disposed on the driving substrate and located between the light-emitting devices; In which, the reflective layer includes a reflective body and multiple low-reflective units, one of the low-reflective units is arranged around one of the support columns, and the reflectivity of the reflective layer at the reflective body position is greater than the reflectivity of the reflective layer at the low-reflective unit position; the low-reflective unit includes an opening located in the reflective layer, and the opening includes multiple sub-openings arranged around the support column. In one of the support columns and the corresponding multiple sub-openings, the opening width of the sub-opening gradually decreases in the direction away from the support column.

2. The light-emitting substrate according to claim 1, wherein The depth of the opening is equal to the thickness of the reflective layer.

3. The light-emitting substrate according to claim 1, wherein The low-reflection unit includes a low-reflection portion located in the opening, a depth of the opening is less than or equal to a thickness of the reflective layer, and a reflectivity of the reflective body is greater than a reflectivity of the low-reflection portion.

4. The light-emitting substrate according to claim 3, wherein The depth of the opening is zero.

5. The light-emitting substrate according to claim 2 or 3, characterized in that: The opening is annular and arranged around the support column.

6. The light-emitting substrate according to claim 1, wherein The low-reflection unit includes a low-reflection portion located in the opening, and the material of the low-reflection portion is ink.

7. The light-emitting substrate according to claim 1, wherein The reflective layer comprises a plurality of through holes, and one end of the support column away from the light guide functional layer passes through one of the through holes and is connected to the driving substrate; The low-reflection unit is spaced apart from the through hole, and the distance between the low-reflection unit and the through hole is greater than or equal to 1.5 mm.

8. The light-emitting substrate according to claim 1, wherein In one of the support columns and a corresponding one of the low-reflection units, a distance between the low-reflection unit and the support column is smaller than a distance between the low-reflection unit and any one of the light-emitting devices.

9. The light-emitting substrate according to claim 1, wherein The distance between the driving substrate and the light guide functional layer is 2 mm to 10 mm.

10. A display device, characterized in that: It comprises the light-emitting substrate according to any one of claims 1 to 9, and a display panel arranged on the light-emitting side of the light-emitting substrate.

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