Lamp panel and display panel

Abstract

A lamp panel (1) and a display panel. The lamp panel comprises a substrate (10) with a mounting surface (100), a plurality of light-emitting units (11), and a light guide layer (13), wherein the plurality of light-emitting units (11) are spaced apart on the mounting surface (100); the light guide layer (13) comprises a light guide base layer (130) and a light guide stack layer (131) for reflecting light emitted by the light-emitting units (11); one side of each light-emitting unit (11) away from the substrate (10) is provided with the light guide base layer (130) relative to each light-emitting unit (11); one side of each light-emitting unit (11) away from the substrate (10) is provided with the light guide stack layer (131) relative to at least some of the light-emitting units (11); and the light guide stack layer (131) is arranged on the side of the light guide base layer (130) away from the substrate (10).

Description

Light board and display panel Technical Field

[0001] The present application relates to, but is not limited to, the field of display technology, and specifically to a light board and a display panel. Background Art

[0002] Currently, in liquid crystal display panels, the light board includes multiple light-emitting units. In order to avoid uneven picture display, light shadows and other undesirable effects, more backlight mixed light film materials are needed to improve the overall lighting effect and picture quality. The structure is relatively complex and the cost is high. SUMMARY OF THE INVENTION

[0003] While MiniLEDs (sub-millimeter light-emitting diodes) still have room for improvement in thickness and response time compared to OLEDs (organic light-emitting diodes), they offer significant advantages in power consumption, HDR standards, brightness, and product reliability. However, the uneven distribution of LEDs across the panels results in poor image quality in both backlight and module modes, necessitating the use of more backlight blending film to improve overall lighting efficiency and image quality.

[0004] In summary, existing light boards are more likely to have undesirable effects such as uneven display and light shadows. Therefore, it is necessary to provide a light board and a display panel to improve at least one of the above defects.

[0005] An embodiment of the present application provides a light board, aiming to simplify the backlight structure of the light board and improve the overall lighting effect and picture quality; another object of the present application is to provide a display panel using the above-mentioned light board.

[0006] Technical solution: A light board according to an embodiment of the present application includes a substrate, a light-emitting unit, and a light-guiding layer, wherein:

[0007] The substrate has a mounting surface;

[0008] There are multiple light-emitting units, and the multiple light-emitting units are arranged on the mounting surface at intervals;

[0009] The light-guiding layer is arranged on the side of the light-emitting unit away from the substrate, and the light-guiding layer includes a light-guiding base layer and a light-guiding stack for reflecting at least part of the light emitted by the light-emitting unit. The light-guiding base layer is provided on the side of the light-emitting unit away from the substrate relative to each light-emitting unit, and the light-guiding stack is provided on the side of the light-emitting unit away from the substrate relative to at least part of the light-emitting units, and the light-guiding stack is arranged on the side of the light-guiding base layer away from the substrate.

[0010] In some embodiments, the light guide stack on at least a portion of the light guide base layer is provided with multiple layers.

[0011] In some embodiments, the plurality of light guide layers are stacked in a direction away from the light guide base layer.

[0012] In some embodiments, the orthographic projection area of ​​the light guide base layer on the substrate is larger than the orthographic projection area of ​​the light guide stack on the substrate.

[0013] In some embodiments, among the adjacent light guide stacks, the orthographic projection area of ​​the light guide stack close to the light guide base layer on the substrate is larger than the orthographic projection area of ​​the light guide stack far from the light guide base layer on the substrate.

[0014] In some embodiments, the plurality of light-emitting units form a first light-emitting area and a second light-emitting area on the mounting surface, and the first light-emitting area surrounds the outside of the second light-emitting area.

[0015] In some embodiments, the number of the light guide stacks in the first light emitting area is less than the number of the light guide stacks in the second light emitting area.

[0016] In some embodiments, the number of the light guide stacks in the first light emitting region is equal to the number of the light guide stacks in the second light emitting region.

[0017] In some embodiments, the sum of the orthographic projection areas of the light guide stack in the first light emitting region on the substrate is S1, and the sum of the orthographic projection areas of the light guide stack in the second light emitting region on the substrate is S2, satisfying S1<S2.

[0018] In some embodiments, the light board has a first direction and a second direction that intersect each other, and a plane defined by the first direction and the second direction is parallel to or coincides with the mounting surface.

[0019] In some embodiments, the spacing between adjacent light-emitting units in the first direction is D1, the spacing between adjacent light-emitting units in the second direction is D2, the maximum width of the light-guiding layer in the first direction is D3, and the maximum width of the light-guiding layer in the second direction is D4, satisfying: D1>D2, D3>D4.

[0020] In some embodiments, the spacing between adjacent light-emitting units in the first direction is D1, the spacing between adjacent light-emitting units in the second direction is D2, the maximum width of the light-guiding layer in the first direction is D3, and the maximum width of the light-guiding layer in the second direction is D4, satisfying: D1=D2, D3=D4.

[0021] In some embodiments, the spacing between adjacent light-emitting units in the first direction is D1, the spacing between adjacent light-emitting units in the second direction is D2, the maximum width of the light-guiding layer in the first direction is D3, and the maximum width of the light-guiding layer in the second direction is D4, satisfying: D1<D2, D3<D4.

[0022] In some embodiments, the light board further includes a light guide auxiliary layer, and the light guide auxiliary layer is provided on a side of the light emitting unit away from the substrate.

[0023] In some embodiments, the orthographic projection of the light-guiding auxiliary layer on the substrate is located between the orthographic projections of two adjacent light-emitting units on the substrate.

[0024] In some embodiments, a layer of the light guide stack is provided on the light guide base layer, and the light guide stack includes a base and a ball head, the base is connected to the light guide base layer, and the ball head is connected to the side of the base away from the light guide base layer.

[0025] In some embodiments, multiple layers of the light guide stack are provided on the light guide base layer, and the light guide stack located on the outermost layer includes a base and a ball head, the base connects the adjacent light guide stack, and the ball head connects the side of the base away from the adjacent light guide stack.

[0026] In some embodiments, the light board has a third direction, and the light guide base layer and the light guide stack are stacked in the third direction;

[0027] The thickness of the light guide substrate in the third direction is T1, which satisfies 3 μm≤T1≤5 μm.

[0028] In some embodiments, the thickness of the light guide stack in the third direction is T2, satisfying 3 μm≤T2≤8 μm.

[0029] Correspondingly, a display panel described in an embodiment of the present application includes the light board as described above. Beneficial effects

[0030] The light board of the embodiment of the present application includes a substrate, a light-emitting unit, and a light-guiding layer, wherein the substrate has a mounting surface, a plurality of light-emitting units are provided and spaced apart from each other on the mounting surface, and the light-guiding layer is used to suppress the light emitted by the light-emitting units. The light-guiding layer includes a light-guiding base layer and a light-guiding laminate. The light-emitting units are provided with a light-guiding laminate on a side of the light-emitting unit away from the substrate relative to at least some of the light-emitting units, and the light-guiding laminate is provided on a side of the light-guiding base layer that is away from the light-emitting unit. The light emitted by the light-emitting unit is suppressed by the light-guiding layer, and the light emitted by the light-emitting unit is mostly emitted between adjacent light-emitting units after multiple reflections, that is, the light is dispersed at the end of the light board, replacing backlight mixing film materials such as dichroic film, improving the light and shadow effect, thereby enhancing the overall lighting effect and picture quality, and helping to reduce or even eliminate the use of dichroic film materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0032] FIG1 is a structural diagram of the light panel and the light-emitting unit according to an embodiment of the present application;

[0033] FIG2 is a schematic structural diagram of a first light-emitting region and a second light-emitting region according to an embodiment of the present application;

[0034] FIG3 is a schematic structural diagram of a light guide layer viewed from the third direction according to an embodiment of the present application;

[0035] FIG4 is a schematic structural diagram of a light guide layer viewed from a third direction parallel to an embodiment of the present application;

[0036] FIG5 is a schematic structural diagram of a light guide layer according to another embodiment of the present application;

[0037] FIG6 is a schematic diagram showing a brightness comparison of the spacing between light emitting units and the size of light guide layers in different embodiments of the present application;

[0038] FIG7 is a schematic structural diagram of light guide layers in the first and second light-emitting regions according to another embodiment of the present application;

[0039] FIG8 is a schematic structural diagram of light guide layers in the first and second light-emitting regions according to another embodiment of the present application;

[0040] FIG9 is a schematic structural diagram of light guide layers in the first and second light-emitting regions according to another embodiment of the present application;

[0041] FIG10 is a schematic structural diagram of a light guide layer according to another embodiment of the present application;

[0042] Figure numerals: 1, lamp board; 10, substrate; 100, mounting surface; 11, light-emitting unit; 110, first light-emitting area; 111, second light-emitting area; 112, first LED lamp; 113, second LED lamp; 12, sealing layer; 13, light-guiding layer; 130, light-guiding base layer; 131, light-guiding stack; 1310, first stack; 1311, second stack; 1312, base; 1313, ball head; 132, light-guiding auxiliary layer; X, first direction; Y, second direction; Z, third direction. Modes for Carrying Out the Invention

[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 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.

[0044] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like 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, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "multiple" means two or more, and at least one means one, two or more, unless otherwise clearly and specifically defined.

[0045] The embodiment of the present application discloses a light board that can solve at least one of the following problems: poor backlight quality in module state, uneven picture display, lamp shadow, etc. caused by uneven distribution of LED lights between the light boards.

[0046] 1 and 2 , the lamp board 1 includes a substrate 10, a light-emitting unit 11 and a light-guiding layer 13. The lamp board 1 has a first direction X, a second direction Y and a third direction Z that intersect with each other. The substrate 10 and the light-guiding layer 13 are sequentially arranged in the third direction Z. The substrate 10 has a mounting surface 100 on the side facing the light-guiding layer 13. A plurality of light-emitting units 11 are provided, and the plurality of light-emitting units 11 are arranged on the mounting surface 100 at intervals from each other. The light-guiding layer 13 includes a light-guiding base layer 130 and a light-guiding stack 131 for reflecting at least part of the light emitted by the light-emitting unit 11. A light-guiding base layer 130 is provided on a side of the light-emitting unit 11 away from the substrate 10 relative to each light-emitting unit 11. A light-guiding stack 131 is provided on a side of the light-emitting unit 11 away from the substrate relative to at least part of the light-emitting unit 11, and the light-guiding stack 131 is arranged on a side of the light-guiding base layer 130 that is away from the opposite light-emitting unit 11.

[0047] It should be noted that in this embodiment, the light guide layer 13 is made of a semi-transparent and semi-reflective material, such as a light-shielding ink material and a coating, silk-screening, or other process to arrange the light guide layer 13 on the side of the light-emitting unit 11 away from the mounting surface 100. In other embodiments, a small PET light guide plate can also be used and positioned by molding or point-to-point lamination. The light emitted by the light-emitting unit 11 is suppressed by the light guide layer 13. After multiple reflections, most of the light emitted by the light-emitting unit 11 is emitted between adjacent light-emitting units 11, that is, the light is dispersed at the end of the light board 1, replacing backlight mixing film materials such as dichroic film, improving the light and shadow effect, thereby enhancing the overall light effect and picture quality, and helping to reduce or even eliminate the use of dichroic film materials.

[0048] It should be noted that, in this embodiment, the light emitting unit may be an LED lamp.

[0049] Specifically, referring to Figure 1 , the light panel 1 in this embodiment further includes a sealing layer 12, which is disposed on the mounting surface 100 and covers each light-emitting unit 11. The light-guiding layer 13 is disposed on the side of the sealing layer facing away from the mounting surface 100. In other embodiments, the light-guiding layer 13 may not be disposed on the sealing layer 12. It should be noted that disposing the light-guiding layer 13 on the sealing layer 12 can avoid problems such as the light-guiding layer 13 being too close to the light-emitting unit 11 when disposed directly on the light-emitting unit 11, which could easily cause the light-guiding layer 13 to overheat, become excessively transparent, or suffer from insufficient flatness leading to delamination.

[0050] As shown in Figure 1, when the light-guiding layer 131 is stacked on the light-guiding base layer 130, the amount of light directly above the corresponding light-emitting unit 11 is significantly reduced, that is, the brightness at the center of the light-emitting unit 11 is reduced. Correspondingly, the amount of light emitted between adjacent light-emitting units 11 is significantly increased, that is, the brightness between adjacent light-emitting units 11 is improved, thereby further optimizing the overall brightness uniformity of the light board 1.

[0051] In some embodiments, referring to FIG. 2 , the light guide layer 131 on at least a portion of the light guide base layer 130 is provided with multiple layers. In this embodiment, two layers of light guide layer 131 are provided on the light guide base layer 130 above each light emitting unit 11. That is, in this embodiment, the light guide layer 131 includes a first layer 1310 and a second layer 1311. The first layer 1310 is connected to the side of the light guide base layer 130 facing away from the sealing layer 12, and the second layer 1311 is connected to the first layer 1310. Adaptively adding the light guide layer 131 facilitates adjusting the brightness uniformity of the entire light panel 1.

[0052] In some embodiments, referring to Figures 2 to 4, the orthographic projection area of ​​the light guide base layer 130 on the substrate 10 is larger than the orthographic projection area of ​​the light guide stack 131 on the substrate 10. At the same time, in this embodiment, the orthographic projection areas of the first stack 1310 and the second stack 1311 on the substrate 10 decrease, that is, the relative coverage range of the light guide base layer 130 and the first stack 1310 and the second stack 1311 of the light emitting unit 11 gradually decreases, aiming to weaken the light intensity directly above the light emitting unit 11 and open a larger angle of the light path, which is conducive to mixing light, so that the brightness of the entire light board 1 is uniform and the overall lighting effect is optimized.

[0053] In other embodiments, the orthographic projection areas of the multi-layer light guide stack 131 on the substrate 10 may also be the same, that is, the light intensity and spacing of different light-emitting units 11 can be flexibly adjusted.

[0054] In some embodiments, referring to Figures 2 and 3, the lamp board 1 further includes a light-guiding auxiliary layer 132, which is arranged on the side of the sealing layer 12 away from the mounting surface 100, and the light-guiding auxiliary layer 132 is located between adjacent light-emitting units 11. In the embodiment of the present application, a plurality of light-guiding auxiliary layers 132 are evenly arranged in the blank area between adjacent light-emitting units 11, thereby further adjusting the light path and improving the brightness uniformity of the overall lamp board 1. In some embodiments, referring to Figure 5, the second stack 1311 includes a base 1312 connected to the first stack 1310 and a spherical head 1313 connected to the side of the base 1312 away from the first stack 1310, that is, the second stack 1311 as a whole can be set to a hemispherical structure. The second stack 1311 acts as a light-scattering unit. Its hemispherical structure is beneficial for providing a larger light-emitting angle and improving the overall light mixing effect compared to the planar structure. At the same time, it is beneficial for replacing the dichroic film material and reducing the difficulty of the assembly process and the material cost.

[0055] It can be understood that in other embodiments, when a layer of light-guiding stack 131 is provided on the light-guiding base layer 130, the light-guiding stack 131 can be set as a hemispherical structure composed of a base 1312 and a ball head 1313. Similarly, when more than two layers of light-guiding stack 131 are provided on the light-guiding base layer 130, the light-guiding stack 131 located on the outermost layer can be set as a hemispherical structure composed of a base 1312 and a ball head 1313.

[0056] In some embodiments, referring to Figures 3 and 6, the plane defined by the first direction X and the second direction Y is parallel to or coincides with the mounting surface 100; the spacing between adjacent light-emitting units 11 in the first direction X is D1, and the spacing between adjacent light-emitting units 11 in the second direction Y is D2. The maximum width of the light-guiding layer 13 in the first direction X is D3, and the maximum width of the light-guiding layer 13 in the second direction Y is D4, satisfying D1>D2, D3>D4; or, D1=D2, D3=D4; or, D1<D2, D3<D4.

[0057] It can be understood that when D1=D2, the substrate 10 has the same size in the first direction X and the second direction Y, and the orthographic projection shape of the light guide layer 13 on the substrate 10 can be a circle that satisfies D3=D4, that is, the coverage of the light guide layer 13 makes the brightness between adjacent light emitting units 11 in the first direction X and the brightness between adjacent light emitting units 11 in the second direction Y the same. Referring to FIG6 , as the spacing D1 between adjacent light emitting units 11 increases, such as D 1’ >D1, the amount of light in the middle between adjacent light-emitting units 11 is significantly reduced, that is, the brightness tends to be uneven.

[0058] When D1>D2, the adaptive adjustment is made so that D3>D4, that is, the orthographic projection of the light guide layer 13 on the substrate 10 can adopt an elliptical shape that satisfies D3>D4, that is, the adjacent light guide layers 13 extend toward the side with a larger distance between the adjacent light emitting units 11, thereby adjusting the light path angle between the adjacent light emitting units 11. Compared with the size D3 of the light guide layer 13 whose orthographic projection is a circle, D 3’ >D3, referring to FIG6 , the amount of light between adjacent light emitting units 11 is increased, thereby adjusting the brightness to be uniform.

[0059] It is understandable that in other embodiments, when D1 < D2 , the size of the light guide layer 13 can be adaptively adjusted to D3 < D4 .

[0060] In addition, it can be understood that in some embodiments, when D1>D2, D3=D4 can also be taken. For example, when the sizes of D3 and D4 are large enough, the impact of the numerical changes of D1 and D2 on the reflection range of the light guide layer 13 can be ignored, and no excessive restrictions are made here.

[0061] In some embodiments, it is understood that the energy density near the edge of the substrate 10 is less than the energy density in the middle of the substrate 10. To this end, referring to FIG. 7 , the plurality of light-emitting units 11 are formed on the mounting surface 100 with a first light-emitting region 110 and a second light-emitting region 111, and the first light-emitting region 110 surrounds the outside of the second light-emitting region 111. The plurality of light-emitting units 11 include a first light-emitting unit 112 located in the first light-emitting region 110 and a second light-emitting unit 113 located in the second light-emitting region 111.

[0062] The number of light-guiding layers 131 on the sealing layer 12 relative to the first light-emitting unit 112 is smaller than the number of light-guiding layers 131 relative to the second light-emitting unit 113. That is, as shown in FIG7 , only one layer of light-guiding layer 131 is provided relative to the first light-emitting unit 112 in the first light-emitting region 110, while two layers of light-guiding layer 131 are provided relative to the second light-emitting unit 113 in the second light-emitting region 111. By thinning the light-guiding layer 13 above the light-emitting unit 11 at the edge of the substrate 10, the overall brightness of the first light-emitting region 110 is improved, which helps to improve the brightness consistency of the entire light panel 1.

[0063] Furthermore, in some embodiments, referring to FIG8 , the number of light-guiding stacks 131 on the sealing layer 12 relative to the first light-emitting unit 112 is equal to the number of light-guiding stacks 131 relative to the second light-emitting unit 113. Furthermore, the sum of the orthographic projection areas of the light-guiding stacks 131 relative to a single first light-emitting unit 112 on the substrate 10 is S1, and the sum of the orthographic projection areas of the light-guiding stacks 131 relative to a single second light-emitting unit 113 on the substrate 10 is S2, satisfying the condition S1 < S2. Specifically, as shown in FIG8 , when the light-guiding stack 131 includes the first stack 1310 and the second stack 1311, the orthographic projection area of ​​the second stack 1311 located in the first light-emitting region 110 on the substrate 10 is smaller than the orthographic projection area of ​​the second stack 1311 located in the second light-emitting region 111 on the substrate 10. This allows more light from the first light-emitting unit 112 in the first light-emitting region 110 to pass through the first stack 1310, thereby improving the overall brightness of the first light-emitting region 110 and facilitating improved brightness consistency across the entire light panel 1.

[0064] In other embodiments, the orthographic projection areas of the first stack 1310 and the second stack 1311 located in the first light-emitting region 110 on the substrate 10 are smaller than the orthographic projection areas of the first stack 1310 and the second stack 1311 located in the second light-emitting region 111 on the substrate 10, which can also improve the overall brightness of the first light-emitting region 110, thereby improving the brightness consistency of the overall light board 1.

[0065] Similarly, in some embodiments, referring to Figure 9, the number of light-guiding stacks 131 on the sealing layer 12 relative to the first light-emitting unit 112 is equal to the number of light-guiding stacks 131 relative to the second light-emitting unit 113; on this basis, the second stack 1311 located in the first light-emitting area 110 retains a portion close to the second light-emitting area 111, thereby increasing the brightness near the edge of the substrate 10, which is beneficial to improving the brightness consistency of the overall light board 1.

[0066] 4, the thickness of the light guide base layer 130 in the third direction Z is T1, which satisfies 3μm≤T1≤5μm; the thickness of the light guide stack 131 in the third direction Z is T2, which satisfies 3μm≤T2≤8μm. In this embodiment, the first stack 1310 takes T 2’ , satisfying 3μm≤T 2’ ≤5μm, the second stack 1311 takes T 2’’ , satisfying 6μm≤T 2’’ ≤8μm.

[0067] In some embodiments, T1 may be:

[0068] The range value consists of any one of 3μm, 3.1μm, 3.2μm, 3.3μm, 3.4μm, 3.5μm, 3.6μm, 3.7μm, 3.8μm, 3.9μm, 4μm, 4.1μm, 4.2μm, 4.3μm, 4.4μm, 4.5μm, 4.6μm, 4.7μm, 4.8μm, 4.9μm, and 5μm, or any two of them.

[0069] In some embodiments, T 2’ Can be:

[0070] The range value consists of any one of 3μm, 3.1μm, 3.2μm, 3.3μm, 3.4μm, 3.5μm, 3.6μm, 3.7μm, 3.8μm, 3.9μm, 4μm, 4.1μm, 4.2μm, 4.3μm, 4.4μm, 4.5μm, 4.6μm, 4.7μm, 4.8μm, 4.9μm, and 5μm, or any two of them.

[0071] In some embodiments, T 2’’ Can be:

[0072] The range value consists of any one of 6μm, 6.1μm, 6.2μm, 6.6μm, 6.7μm, 6.5μm, 6.6μm, 6.7μm, 6.8μm, 6.9μm, 7μm, 7.1μm, 7.2μm, 7.6μm, 7.7μm, 7.5μm, 7.6μm, 7.7μm, 7.8μm, 7.9μm, and 8μm, or any two of them.

[0073] It should be noted that, in addition to this, in some embodiments, the arrangement density of the light-guiding auxiliary layer 132 located in the first light-emitting area 110 may be lower than the arrangement density of the light-guiding auxiliary layer 132 located in the second light-emitting area 111. It can be understood that, on this basis, it is beneficial to increase the light intensity of the first light-emitting area 110 and relatively reduce the second light-emitting area 111, thereby achieving the effect of uniform brightness consistency of the light panel.

[0074] It should be noted that the spacing between adjacent light-emitting units 11 in conventional consumer-grade small and medium-sized MiniLED products is currently 1mm to 4mm. The larger the spacing between adjacent light-emitting units 11, the higher the light mixing requirements. The larger the number of light-guiding layers 13 required and the larger the orthographic projection area on the substrate 10, the greater the benefits (reducing / omitting the backlight dichroic film), but there is also an inevitable reduction in brightness. Comprehensive considerations need to be made during the design phase, and a trade-off must be made between the number of light-guiding layers 13, the area, and the brightness. When the spacing between adjacent light-emitting units 11 is less than 2mm, the maximum number of light-guiding layers 13 can be set to 2. When the spacing between adjacent light-emitting units 11 is around 2mm to 4mm, the number of light-guiding layers 13 is preferably 3 to 4. As the spacing between adjacent light-emitting units 11 continues to increase, the number of light-guiding layers 13 must also increase to maintain the same light mixing effect. In the embodiment of the present application, the spacing between adjacent light-emitting units 11 is 3.8 mm, and the number of layers of the light-guiding layer 13 is 3. Among them, the light-guiding base layer 130 and the first stack 1310 are mainly used for transition, that is, the thickness is between 3μm and 5μm. The second stack 1311 needs to suppress the light directly emitted from the top of the light-emitting unit 11, so the thickness needs to be greater than the first two layers, that is, about 6μm to 8μm.

[0075] It can be understood that, referring to Figure 10, in some embodiments, the light guide layer 13 can adopt a diamond structure in addition to a circular or elliptical structure. In addition, other polygonal structures such as an equilateral triangle, a square, a regular hexagon, etc. can also be adopted. No further details are given here. The structure of the light guide layer 13 is flexibly adjusted according to the arrangement of the light-emitting units 11 to achieve a uniform brightness effect on the entire light panel 1.

[0076] Accordingly, an embodiment of the present application provides a display panel, which includes the above-mentioned light board 1. It is understandable that the display panel can have all the technical features and corresponding beneficial effects of the above-mentioned light board 1, which will not be repeated here.

[0077] The above is a detailed introduction to a lamp board and display panel provided in the embodiments of the present application, and specific examples are used 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 make equivalent replacements for some of the technical features therein; and 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 board, comprising a substrate, a light-emitting unit and a light-guiding layer, wherein: The substrate has a mounting surface; There are a plurality of light emitting units, and the plurality of light emitting units are arranged on the mounting surface at intervals from each other; The light guide layer is arranged on a side of the light emitting unit away from the substrate, and the light guide layer includes a light guide base layer and a light guide stack for reflecting at least part of the light emitted by the light emitting unit. The light guide base layer is provided on the side of the light emitting unit away from the substrate relative to each light emitting unit, the light guide stack is provided on the side of the light emitting unit away from the substrate relative to at least part of the light emitting units, and the light guide stack is arranged on the side of the light guide base layer away from the substrate.

2. The light board according to claim 1, wherein: The light guide stack on at least a portion of the light guide substrate is provided with multiple layers.

3. The light board according to claim 2, wherein: The plurality of light guide layers are stacked in a direction away from the light guide base layer.

4. The light board according to claim 3, wherein: The orthographic projection area of ​​the light guide base layer on the substrate is larger than the orthographic projection area of ​​the light guide stack on the substrate.

5. The light board according to claim 4, wherein: Among the adjacent light guide layers, the orthographic projection area of ​​the light guide layer close to the light guide base layer on the substrate is larger than the orthographic projection area of ​​the light guide layer far from the light guide base layer on the substrate.

6. The light board according to claim 3, wherein: The plurality of light emitting units form a first light emitting area and a second light emitting area on the mounting surface, and the first light emitting area surrounds the outer side of the second light emitting area.

7. The light board according to claim 6, wherein: The number of the light guide stacks in the first light emitting region is less than the number of the light guide stacks in the second light emitting region.

8. The light panel according to claim 6, wherein: The number of the light guide stacks in the first light emitting region is equal to the number of the light guide stacks in the second light emitting region.

9. The light panel according to claim 8, wherein: The sum of the orthographic projection areas of the light guide stack in the first light emitting region on the substrate is S1, and the sum of the orthographic projection areas of the light guide stack in the second light emitting region on the substrate is S2, satisfying S1<S2.

10. The light panel according to claim 1, wherein: The light board has a first direction and a second direction intersecting each other, and a plane defined by the first direction and the second direction is parallel to or coincides with the installation surface.

11. The light board according to claim 10, wherein: The spacing between adjacent light emitting units in the first direction is D1, the spacing between adjacent light emitting units in the second direction is D2, the maximum width of the light guide layer in the first direction is D3, and the maximum width of the light guide layer in the second direction is D4, satisfying: D1>D2, D3>D4.

12. The light panel according to claim 10, wherein: The spacing between adjacent light emitting units in the first direction is D1, the spacing between adjacent light emitting units in the second direction is D2, the maximum width of the light guide layer in the first direction is D3, and the maximum width of the light guide layer in the second direction is D4, satisfying: D1=D2, D3=D4.

13. The light panel according to claim 10, wherein: The spacing between adjacent light emitting units in the first direction is D1, the spacing between adjacent light emitting units in the second direction is D2, the maximum width of the light guide layer in the first direction is D3, and the maximum width of the light guide layer in the second direction is D4, satisfying: D1<D2, D3<D4.

14. The light panel according to claim 1, wherein: The light board further comprises a light guide auxiliary layer, and the light guide auxiliary layer is arranged on a side of the light emitting unit away from the substrate.

15. The light panel according to claim 14, wherein: The orthographic projection of the light-guiding auxiliary layer on the substrate is located between the orthographic projections of two adjacent light-emitting units on the substrate.

16. The light panel according to claim 1, wherein: A layer of the light guide stack is arranged on the light guide base layer, and the light guide stack includes a base and a ball head, wherein the base is connected to the light guide base layer, and the ball head is connected to a side of the base away from the light guide base layer.

17. The light panel according to claim 1, wherein: A plurality of light guide layers are arranged on the light guide base layer, and the light guide layer located at the outermost layer includes a base and a ball head, wherein the base is connected to adjacent light guide layers, and the ball head is connected to a side of the base away from the adjacent light guide layer.

18. The light panel according to claim 1, wherein: The light board has a third direction, and the light guide base layer and the light guide stack are stacked in the third direction; The thickness of the light-guiding substrate in the third direction is T1, which satisfies 3μm≤T1≤5μm.

19. The light board according to any one of claims 1 to 18, wherein: The thickness of the light guide stack in the third direction is T2, satisfying 3μm≤T2≤8μm.

20. A display panel, wherein: Comprising the light board as claimed in any one of claims 1 to 19.

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