Light-emitting substrate and display device

Abstract

The application provides a light-emitting substrate and a display device. The light-emitting substrate comprises a back plate, a first light plate and a second light plate spliced on the back plate, a reflecting sheet connecting the first light plate and the second light plate, and a first concave lens and a second concave lens. The first light plate and the second light plate have a splicing seam therebetween. One end of the first concave lens is arranged at one end of the reflecting sheet close to the first light plate, and one end of the second concave lens is arranged at one end of the reflecting sheet close to the second light plate. Light emitted by the first light plate can be refracted on the first concave lens, then reflected on the reflecting sheet and shot to the upper side of the splicing seam. Light emitted by the second light plate can be refracted on the second concave lens, then reflected on the reflecting sheet and shot to the upper side of the splicing seam. Therefore, the light-emitting substrate can shoot the light emitted by the light plate to the upper side of the splicing seam by using the concave lens and the reflecting sheet, solve the problem of the dark line on the upper side of the splicing seam, and improve the picture quality.

Description

Technical Field

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

[0002] Mini-LED displays are widely favored by consumers due to their advantages such as high color accuracy, uniform brightness, low energy consumption, long lifespan, and thin and aesthetically pleasing design.

[0003] However, its direct-lit backlight module has a defect of dark seams at the splicing point of the light panel, which seriously affects the viewing experience.

[0004] Application content

[0005] The purpose of this application is to provide a light-emitting substrate and a display device, which aims to solve the problem of dark lines at the splicing seams of the light-emitting substrate and improve image quality.

[0006] On one hand, this application provides a light-emitting substrate, the light-emitting substrate comprising:

[0007] Back panel;

[0008] The first light panel and the second light panel are spliced ​​onto the back panel, and there is a splicing seam between the first light panel and the second light panel;

[0009] A reflector sheet connects the first lamp panel and the second lamp panel;

[0010] A first concave lens, one end of which is disposed at the end of the reflector near the first lamp plate;

[0011] The second concave lens has one end disposed at the end of the reflector near the second lamp plate.

[0012] In some embodiments, the cross-sectional shape of the first concave lens and the second concave lens along the direction perpendicular to the reflector is elongated.

[0013] In some embodiments, the first concave lens and the second concave lens are located on the reflective sheet, and the angle between them and the reflective sheet is less than or equal to 60°.

[0014] In some embodiments, the light-emitting substrate further includes:

[0015] A lens placement plate is attached to the side of the reflective sheet opposite to the first and second concave lenses.

[0016] In some embodiments, the lens placement plate overlaps the ends of the first lamp plate and the second lamp plate.

[0017] In some embodiments, the lens placement plate is located within the seam between the first lamp plate and the second lamp plate.

[0018] In some embodiments, the light-emitting substrate further includes:

[0019] A diffuser plate is located on the side of the first lamp plate and the second lamp plate opposite to the back plate;

[0020] A support column is located between the diffuser plate and the first lamp plate or the second lamp plate.

[0021] In some embodiments, in the direction perpendicular to the reflector, the height of the first concave lens and the second concave lens is less than the height of the support column.

[0022] In some embodiments, a first lamp bead adjacent to the reflector is disposed on the first lamp plate, and a second lamp bead adjacent to the reflector is disposed on the second lamp plate; the first lamp bead has a first light path refracted by the top of the first concave lens and reflected by the reflector, and the second lamp bead has a second light path directly incident by the top of the second concave lens; the first light path at a first position on the diffuser plate coincides with the second light path at a second position on the diffuser plate; or the first position is located on the side of the second position closer to the second lamp bead.

[0023] On the other hand, this application provides a display device that includes the light-emitting substrate provided in any of the above embodiments.

[0024] This application provides a light-emitting substrate and a display device. The light-emitting substrate includes a back plate, a first lamp plate and a second lamp plate spliced ​​on the back plate, a reflective sheet connecting the first lamp plate and the second lamp plate, and a first concave lens and a second concave lens. A splicing seam is formed between the first lamp plate and the second lamp plate. One end of the first concave lens is disposed at the end of the reflective sheet near the first lamp plate, and one end of the second concave lens is disposed at the end of the reflective sheet near the second lamp plate. Light emitted from the first lamp plate can be refracted at the first concave lens and then reflected at the reflective sheet, projecting upwards towards the splicing seam. Light emitted from the second lamp plate can be refracted at the second concave lens and then reflected at the reflective sheet, projecting upwards towards the splicing seam. Therefore, this application utilizes concave lenses and reflective sheets to allow light emitted from the lamp plates to be projected upwards towards the splicing seam, solving the problem of dark lines above the splicing seam and improving image quality. Attached Figure Description

[0025] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0026] Figure 1 This is a schematic diagram of the structure of the light-emitting substrate provided in some embodiments of this application;

[0027] Figure 2 This is a schematic diagram of the optical path of the lamp beads in the light-emitting substrate provided in some embodiments of this application;

[0028] Figure 3 This is a schematic diagram of the structure of a light-emitting substrate provided in some embodiments of this application. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0030] 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 construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0031] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0033] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a light-emitting substrate provided in some embodiments of this application. The light-emitting substrate 100 can be applied to various electronic devices, such as wearable devices like smart bracelets, smartwatches, VR (Virtual Reality) devices, mobile phones, e-books and e-newspapers, televisions, personal portable computers, foldable and rollable flexible display and lighting devices.

[0034] The light-emitting substrate 100 can be used for direct display or as a backlight module to provide backlight for the display panel.

[0035] The light-emitting substrate 100 includes a back plate 10, a first lamp plate 20 and a second lamp plate 30 located on the back plate 10, a reflective sheet 40 connecting the first lamp plate 20 and the second lamp plate 30, and a first concave lens 21 and a second concave lens 31. A seam S is provided between the first lamp plate 20 and the second lamp plate 30. One end of the first concave lens 21 is disposed at the end of the reflective sheet 40 near the first lamp plate 20, and one end of the second concave lens 31 is disposed at the end of the reflective sheet 40 near the second lamp plate 30.

[0036] Multiple LEDs are respectively arranged on the first LED panel 20 and the second LED panel 30. The LEDs can be arranged in an array on the first LED panel 20 and in an array on the second LED panel 30. Since the LEDs are not located at the splicing seam S, the number of Mini-LEDs used can be reduced to a certain extent, thus reducing energy consumption, lowering costs, and saving materials.

[0037] It should be noted that the diagram is a cross-sectional view, so the LEDs can be seen arranged along the first direction (X), which is parallel to the back plate 10.

[0038] In some embodiments, the first concave lens 21 and the second concave lens 31 are both elongated strips along a cross-section perpendicular to the reflector 40. That is, the cross-section of the first concave lens 21 and the second concave lens 31 along the plane formed by the first direction (X) and the second direction (Y) is elongated strips, and the second direction (Y) is perpendicular to the back plate 10. Therefore, the first concave lens 21 and the second concave lens 31 actually extend along a third direction (Z), and the length of the extension can be equal to the length of the first lamp plate 20 and the second lamp plate 30 in the third direction (Z).

[0039] In some embodiments, the elongated shape can be bent toward the lamp panel side. Figure 1 For example, the first concave lens 21 bends toward the first lamp panel 20, and the second concave lens 31 bends toward the second lamp panel 30.

[0040] The strip can also be bent toward the reflector 40, and one long side of the strip can be straight, the other long side can be curved, or both long sides can be curved.

[0041] The light-emitting substrate 100 may also include a lens placement plate 50, which is attached to the side of the reflective sheet 40 away from the first concave lens 21 and the second concave lens 31.

[0042] In some embodiments, the lens placement plate 50 overlaps the ends of the first lamp plate 20 and the second lamp plate 30, or the lens placement plate 50 overlaps the edges of the first lamp plate 20 and the second lamp plate 30, so the lens placement plate 50 covers the splicing seam S.

[0043] The light-emitting substrate 100 may further include a diffuser plate 60, which is located on the side of the first lamp plate 20 and the second lamp plate 30 opposite to the back plate 10. The diffuser plate 60 may include a lens refraction area A1 and a seam dark line area A2 located in the middle of the lens refraction area A1. The lens refraction area A1 refers to the light distribution area where the light emitted by the lamp bead reaches the diffuser plate 60 after being refracted by the concave lens, and the seam dark line area A2 refers to the area without light caused by the emission blind zone of the lamp bead in the absence of the concave lens.

[0044] Please see Figure 2 , Figure 2 This is a schematic diagram of the optical path of the LEDs in the light-emitting substrate provided in some embodiments of this application. The light path of the LEDs is fan-shaped, so there is a significant emission blind zone below the fan shape. The first LED plate 20 is provided with a first LED 201 adjacent to the reflector 40, and the second LED plate 30 is provided with a second LED 301 adjacent to the reflector 40. Therefore, the emission blind zones of the first LED 201 and the second LED 301 can easily cause no light in the corresponding area above the splicing seam S, and a dark line area A2 corresponding to the splicing seam S appears on the diffuser plate 60.

[0045] like Figure 1As shown, since the first concave lens 21 has a diverging effect on incident light, it can be considered as the lower half of a conventional concave lens. If the incident light ray f1 is parallel to the principal axis of the concave-convex lens, the outgoing light ray f2 will scatter downwards (in the direction shown in the diagram) relative to f1. For the light emitted by the first lamp bead 201, such as light ray L1, if the incident light ray of light ray L1 is deflected downwards (in the direction shown in the diagram) relative to the incident light ray f1, then the outgoing light ray of light ray L1 will be deflected to the right (in the direction shown in the diagram) relative to the outgoing light ray f2. Based on the above principle, the first concave lens 21 can refract the incident light at a large angle. The light emitted by the first lamp panel 20 can be refracted at the first concave lens 21 and then reflected at the reflector 40, pointing towards the top of the splicing seam S. Therefore, the dark line area A2 of the splicing seam has light. Similarly, the second concave lens 31 can refract the incident light at a large angle. The light emitted by the second lamp plate 30 can be refracted on the second concave lens 31 and then reflected on the reflector 40 and directed towards the top of the splicing seam S.

[0046] In some embodiments, the first concave lens 21 and the second concave lens 31 are located on the reflector 40, and the angle between them and the reflector 40 is less than or equal to 60°. Therefore, the first concave lens 21 and the second concave lens 31 can better refract the incident light onto the reflector 40.

[0047] Figure 1 The diagram shows three rays (ray L1, ray L2, and ray L3) refracted by the first concave lens 21. Ray L1 is the limiting ray of the first LED bead 201, i.e., the ray at the right edge of the fan-shaped area (in the direction shown in the diagram). Ray L3 is the ray refracted at the highest point (top) of the first concave lens 21. Ray L2 is the ray between ray L1 and ray L3. Referring to the directions shown in the diagram (up, down, left, right), ray L1 reaches position P1 after refraction by the first concave lens 21 and reflection by the reflector 40; ray L2 reaches position P2 after refraction by the first concave lens 21 and reflection by the reflector 40; and ray L3 reaches position P3 after refraction by the first concave lens 21 and reflection by the reflector 40.

[0048] Among them, the emission angles of light rays L1, L2 and L3 gradually increase, and the position where they are refracted on the first concave lens 21 becomes higher and higher. At the same time, the refracted light rays also gradually extend to the right at the reflection position of the reflector 40, and the dark line area A2 of the stitching seam is gradually filled with light, thus improving the image quality.

[0049] Please see Figure 3 , Figure 3 This is a schematic diagram of the structure of a light-emitting substrate provided in some embodiments of this application. For ease of understanding and brief explanation, the same structures as those in the above embodiments will continue to use the same reference numerals, and the same structures will not be described in detail. This embodiment will only describe the different structures in detail.

[0050] The difference between the light-emitting substrate 200 and the light-emitting substrate 100 in the above embodiment is that the lens placement plate 50a is located in the splicing seam S between the first lamp plate 20 and the second lamp plate 30.

[0051] Figure 3 The diagram shows three rays (ray L4, ray L5, and ray L6) refracted by the second concave lens 31. Ray L4 is the limiting ray of the second LED bead 301, i.e., the ray at the left edge of the fan-shaped area. Ray L6 is the ray refracted at the highest point (top) of the second concave lens 31. Ray L5 is the ray between ray L4 and ray L6. Referring to the directions shown in the diagram (up, down, left, right), ray L4 reaches position P4 after refraction by the second concave lens 31 and reflection by the reflector 40; ray L5 reaches position P5 after refraction by the second concave lens 31 and reflection by the reflector 40; and ray L6 reaches position P6 after refraction by the second concave lens 31 and reflection by the reflector 40.

[0052] Combination Figure 1 and Figure 3 It can be seen that positions P1 and P4 are exactly the boundaries of the dark seam area A2, and positions P2 and P5 are located in the middle of the dark seam area A2. Therefore, the dark seam area A2 can be filled with light by the first concave lens 21, the second concave lens 31 and the reflector 40.

[0053] In some embodiments, the position where light ray L1 reaches the diffuser plate 60 can be to the left of the seam dark line area A2, that is, to the left of position P1. The position where light ray L4 reaches the diffuser plate 60 can be to the right of the seam dark line area A2, that is, to the right of position P4.

[0054] In some embodiments, the light-emitting substrate 100 / 200 may further include a support pillar (not shown in the figure), which is located between the diffuser plate 60 and the first lamp plate 20 (or the second lamp plate 30). Therefore, there is a certain gap between the concave lens (the first concave lens 21 and the second concave lens 31) and the diffuser plate 60, and the light emitted by the lamp can directly hit the diffuser plate 60.

[0055] like Figure 1As shown, the first LED bead 201 has a first light path, namely light L3, which is refracted by the top of the first concave lens 21 and reflected by the reflector 40. The second LED bead 301 has a second light path M1 that is directly incident on the diffuser plate 60 through the top of the second concave lens 31. The first position (position P3) of the first light path on the diffuser plate 60 coincides with the second position of the second light path M1 on the diffuser plate 60; or the first position is located on the side of the second position closer to the second LED bead 301, that is, position P3 is located to the right of the second position (in the direction shown in the figure). Therefore, dark lines at corresponding positions on the diffuser plate 60 caused by the obstruction of the first concave lens 21 and the second concave lens 31 can be avoided.

[0056] Similarly, such as Figure 3 As shown, the second LED bead 301 has a third light path, namely light L6, which is refracted by the top of the first concave lens 21 and reflected by the reflector 40. The first LED bead 201 has a fourth light path M2 that is directly incident on the diffuser plate 60 through the top of the second concave lens 31. The third position (position P6) of the third light path on the diffuser plate 60 coincides with the fourth position of the fourth light path M2 on the diffuser plate 60; or the third position is located on the side of the fourth position closer to the first LED bead 201, that is, position P6 is located to the left of the fourth position (in the direction shown in the figure).

[0057] The light-emitting substrate provided in this application includes a back plate 10, a first lamp plate 20 and a second lamp plate 30 spliced ​​on the back plate 10, a reflective sheet 40 connecting the first lamp plate 20 and the second lamp plate 30, and a first concave lens 21 and a second concave lens 31. A splicing seam S is formed between the first lamp plate 20 and the second lamp plate 30. One end of the first concave lens 21 is disposed at the end of the reflective sheet 40 near the first lamp plate 20, and one end of the second concave lens 31 is disposed at the end of the reflective sheet 40 near the second lamp plate 30. Light emitted from the first lamp plate 20 can be refracted at the first concave lens 21 and then reflected at the reflective sheet 40, projecting upwards towards the splicing seam S. Light emitted from the second lamp plate 30 can be refracted at the second concave lens 31 and then reflected at the reflective sheet 40, projecting upwards towards the splicing seam S. Therefore, this application utilizes concave lenses and reflective sheets 40 to allow light emitted from the lamp plates to be projected upwards towards the splicing seam S, solving the problem of dark lines above the splicing seam S and improving image quality.

[0058] This application also provides a display device, which includes the light-emitting substrate provided in any of the above embodiments. This display device has the same beneficial effects as the light-emitting substrate described above, and will not be repeated here.

[0059] The above description of the embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application; those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A light-emitting substrate, characterized in that, The light-emitting substrate includes: Back panel; The first light panel and the second light panel are spliced ​​onto the back panel, and there is a splicing seam between the first light panel and the second light panel; A reflector sheet connects the first lamp panel and the second lamp panel; A first concave lens, one end of which is disposed at the end of the reflector near the first lamp plate; A second concave lens, one end of which is disposed at the end of the reflector near the second lamp plate; A diffuser plate is located on the side of the first lamp plate and the second lamp plate opposite to the back plate; The first lamp plate is provided with a first lamp bead adjacent to the reflector, and the second lamp plate is provided with a second lamp bead adjacent to the reflector; the first lamp bead has a first light path refracted by the top of the first concave lens and reflected by the reflector, and the second lamp bead has a second light path directly shone by the top of the second concave lens; the first light path at a first position on the diffuser plate coincides with the second light path at a second position on the diffuser plate; or the first position is located on the side of the second position closer to the second lamp bead.

2. The light-emitting substrate according to claim 1, characterized in that, Both the first concave lens and the second concave lens have elongated cross-sectional shapes along the direction perpendicular to the reflector.

3. The light-emitting substrate according to claim 2, characterized in that, The first concave lens and the second concave lens are located on the reflective sheet, and the angle between them and the reflective sheet is less than or equal to 60°.

4. The light-emitting substrate according to claim 1, characterized in that, The light-emitting substrate further includes: A lens placement plate is attached to the side of the reflective sheet opposite to the first and second concave lenses.

5. The light-emitting substrate according to claim 4, characterized in that, The lens mounting plate overlaps the ends of the first lamp plate and the second lamp plate.

6. The light-emitting substrate according to claim 4, characterized in that, The lens placement plate is located within the splicing seam between the first lamp plate and the second lamp plate.

7. The light-emitting substrate according to claim 1, characterized in that, The light-emitting substrate further includes: A support column is located between the diffuser plate and the first lamp plate or the second lamp plate.

8. The light-emitting substrate according to claim 7, characterized in that, In the direction perpendicular to the reflector, the height of the first concave lens and the second concave lens is less than the height of the support column.

9. A display device, characterized in that, The display device includes the light-emitting substrate according to any one of claims 1-8.

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