A high-brightness light guide plate
By setting staggered first and second protrusions on the light guide plate, combined with equilateral and isosceles triangle structures, the problem of uneven light output from the light guide plate is solved, achieving higher light output brightness and uniformity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU CHANGJIA ELECTRONICS
- Filing Date
- 2025-09-05
- Publication Date
- 2026-06-30
AI Technical Summary
The existing arrangement of protrusions on the light guide plate results in uneven light output, which easily forms light spots and affects the light output effect of the light guide plate.
By employing first and second convex points with different distribution densities and staggered arrangements, combined with equilateral and isosceles triangle structures, the distribution of convex points on the light-emitting surface of the light guide plate is adjusted, increasing the difference in convex point density between the light-guiding area and the outer area of the light source, and grooves are set between the convex points to extend the light transmission path.
It improves the brightness and uniformity of light output from the light guide plate, reduces the occurrence of light spots, and enhances the overall light output efficiency of the light guide plate.
Smart Images
Figure CN224436620U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of light guide plate technology, specifically to a high-brightness light guide plate. Background Technology
[0002] Existing light guide plates improve their light emission efficiency by creating a total internal reflection structure on the light-emitting surface using a raised dot structure. However, these raised dot structures are primarily fabricated using a dot-matrix template transfer method, and each dot is designed to be the same size. This results in several raised dots being evenly distributed on the light-emitting surface. Because the light intensity on the incident side of the light guide plate is relatively high, the existing dot arrangement easily creates light spots on the incident side, leading to insufficient uniformity in the light emission efficiency and affecting the overall light emission efficiency. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of the prior art. This invention provides a high-brightness light guide plate. By setting different distribution densities and staggered arrangement of the first and second protrusions, the light output brightness of the light guide plate is improved, and the light output uniformity of the light guide plate is also improved.
[0004] This utility model provides a high-brightness light guide plate, which includes: a light guide plate body and a plurality of protrusion structures disposed on the light guide plate body;
[0005] The convex structure includes several first convex points and several second convex points, wherein the first convex points and the second convex points are arranged in an alternating queue;
[0006] The first convex point forms an equilateral triangle with the two adjacent second convex points, and / or the first convex point forms an isosceles triangle with the two adjacent second convex points.
[0007] Furthermore, the protrusion height of the first protrusion is h1, the protrusion height of the second protrusion is h2, and the constraint relationship between h1 and h2 is: h2≤h1≤1.2*h2.
[0008] Furthermore, the distance between the first protrusion and the adjacent second protrusion is h3, and the constraint relationship of h3 is: 0.1mm≤h3≤0.5mm, or the constraint relationship of h3 is: 0.01mm≤h3≤0.08mm.
[0009] Furthermore, the light guide plate is provided with a light source guiding area and a light guide outer area, and the distribution density of several protrusion structures located in the light source guiding area is less than the distribution density of several protrusion structures located in the light guide outer area.
[0010] Furthermore, the light guide plate is made of PMMA material.
[0011] Furthermore, the material of the protrusion structure is a resin layer.
[0012] Furthermore, the convex structure located in the light guide area of the light source has a convex thickness of H1 and a convex diameter of D1. The constraint relationship between H1 and D1 is: 0.3≤H1 / D1≤0.4.
[0013] Furthermore, the convex structure located in the outer region of the light guide has a convex thickness of H2 and a convex diameter of D2. The constraint relationship between H2 and D2 is: 0.4 < H2 / D2 ≤ 0.8.
[0014] Furthermore, the light guide plate also includes a reflective film, which is attached to the back of the light guide plate body.
[0015] Furthermore, a groove is provided between the first protrusion and the second protrusion, and the groove is distributed at 1 / 3 of the straight path between the first protrusion and the second protrusion.
[0016] This invention provides a high-brightness light guide plate. By setting staggered first and second protrusions on the light-emitting surface of the light guide plate, and adjusting the distribution density of the protrusion structure on the light-emitting surface of the light guide plate based on the distribution shape of the first and second protrusions, the light output efficiency of the light guide plate is made uniform. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the structure of the high-brightness light guide plate in an embodiment of this utility model;
[0019] Figure 2 This is a top view of the high-brightness light guide plate in an embodiment of this utility model;
[0020] Figure 3 This is a cross-sectional view of the high-brightness light guide plate in an embodiment of this utility model;
[0021] Figure 4 This is an example of the embodiments of this utility model. Figure 3 An enlarged schematic diagram of the structure at point A. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0023] Figure 1 A schematic diagram of the high-brightness light guide plate of this utility model is shown. Figure 2 The diagram shows a top view of the high-brightness light guide plate in an embodiment of the present invention. The high-brightness light guide plate includes: a light guide plate body 1, and a plurality of protrusion structures 2 disposed on the light guide plate body 1. The protrusion structures 2 are distributed on the light-emitting surface of the light guide plate. Based on the plurality of protrusion structures 2, the light emitted from the light-emitting surface of the light guide plate is subjected to total internal reflection, thereby improving the light emission effect of the light guide plate.
[0024] Specifically, the plurality of convex structures 2 include a plurality of first convex points 21 and a plurality of second convex points 22. The first convex points 21 and the second convex points 22 are arranged in an alternating queue, that is, the plurality of first convex points 21 form a first queue and the plurality of second convex points 22 form a second queue. The first queue and the second queue are arranged in an alternating manner, and the first queue and the second queue are staggered, so that the first convex points 21 and the second convex points 22 can uniformly cover the light-emitting surface of the light guide plate.
[0025] The first protrusion 21 and the two adjacent second protrusions 22 form an equilateral triangle, and / or the first protrusion 21 and the two adjacent second protrusions 22 form an isosceles triangle. In this embodiment, according to the light emission position of the light source corresponding to the light guide plate, the light guide plate is divided into a light source light guide area and a light guide outer area. Based on the light emission requirements of different areas on the light guide plate, the distribution density of several protrusion structures 2 on the light guide plate is adjusted so that several protrusion structures 2 can meet the light emission requirements of the light guide plate.
[0026] Furthermore, the several protrusion structures 2 inside the light guide area of the light guide plate are arranged in an equilateral triangle, that is, any first protrusion 21 and two adjacent second protrusions 22 form an equilateral triangle distribution, so that the light output efficiency of the light guide area of the light source is uniform.
[0027] Furthermore, the distribution density of several protrusion structures 2 in the outer light-guiding area of the light guide plate is increased, and an isosceles triangle structure is formed between any first protrusion 21 and two adjacent second protrusions 22, thereby enhancing the light refraction and reflection capabilities among the several protrusion structures 2, thereby improving the light output efficiency of the outer light-guiding area of the light guide plate, making the overall light output effect of the light guide plate uniform, and thus effectively improving the light output efficiency of the light guide plate.
[0028] Specifically, Figure 3 A cross-sectional view of the high-brightness light guide plate in an embodiment of this utility model is shown; Figure 4 The appendix of the present utility model is shown in the embodiment. Figure 3 An enlarged schematic diagram of the structure at point A. The protrusion height of the first protrusion 21 is h1, and the protrusion height of the second protrusion 22 is h2. The constraint relationship between h1 and h2 is: h2≤h1≤1.2*h2, which allows the first protrusion 21 to be higher than the second protrusion 22. When light is refracted by the second protrusion 22, it is emitted towards the first protrusion 21. Based on the fact that the first protrusion 21 can refract and reflect the light emitted by the second protrusion 22, the light emission effect of the light guide plate is uniform.
[0029] Furthermore, by setting a first protrusion 21 and a second protrusion 22 with a height difference, a spatially staggered distribution is formed between the first protrusion 21 and the second protrusion 22, thereby effectively improving the light emission efficiency of the light-emitting surface of the light guide plate.
[0030] Specifically, the distance between the first protrusion 21 and the adjacent second protrusion 22 is h3. The constraint relationship of h3 is: 0.1mm≤h3≤0.5mm. In the near light source area of the light guide plate, that is, the light incident side of the light guide plate, the distance between several protrusion structures 2 is relatively large. The distance h3 can be one of 0.1mm, 0.2mm, 0.3mm, 0.4mm, and 0.5mm, so that the light output efficiency of several protrusion structures 2 in the light guide area of the light source is reduced, and local bright spots are avoided due to excessive light.
[0031] Furthermore, the constraint relationship of h3 can also be: 0.01mm≤h3≤0.08mm. In the far light source area of the light guide plate, that is, the outer area of the light guide, the spacing of the dot distribution formed by several convex structures 2 is significantly reduced, thereby increasing the distribution density of the convex structures 2 in the outer area of the light guide. The value of h3 can be one of 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, and 0.08mm. By increasing the dot density, light decay is compensated and edge brightness is improved.
[0032] Furthermore, by adjusting the distribution density of the protrusion structure 2 on the light-emitting surface of the light guide plate, the overall light emission of the light guide plate becomes uniform, thereby improving the light emission efficiency of the light guide plate.
[0033] Specifically, the light guide plate is made of PMMA, an optical-grade polymethyl methacrylate (PPMA) material with good light transmittance and low light loss during propagation. Simultaneously, light scattering within the light guide plate body 1 is minimal, resulting in excellent light transmission directionality.
[0034] Specifically, the material of the protrusion structure 2 is a resin layer, which allows the protrusion structure 2 to be firmly attached to the light guide plate body 1. The resin layer has a good light refractive index and a heat distortion temperature of 130-140℃, which can withstand higher working temperatures and meet the working requirements of the light guide plate.
[0035] Specifically, the protrusion thickness of the protrusion structure 2 located in the light guide area of the light source is H1, and the protrusion diameter is D1. The constraint relationship between H1 and D1 is: 0.3≤H1 / D1≤0.4, which weakens the scattering performance of the protrusion structure 2 in the light guide area of the light source and avoids the light from gathering in the light guide area of the light source to form a light spot, that is, avoids the light guide area of the light guide plate from being exposed.
[0036] Furthermore, the protrusion thickness of the protrusion structure 2 located in the outer region of the light guide is H2, and the protrusion diameter is D2. The constraint relationship between H2 and D2 is: 0.4 < H2 / D2 ≤ 0.8, which can improve the light absorption performance of the protrusion structure 2 in the outer region of the light guide, thereby drawing light to concentrate in the outer region of the light guide, improving the light output brightness of the outer region of the light guide plate, and thus improving the light output uniformity of the light guide plate.
[0037] Furthermore, the light guide plate also includes a reflective film 3, which is attached to the back of the light guide plate body 1. By laying the reflective film 3 on the back of the light guide plate body 1, the light leaking to the back of the light guide plate body 1 is reflected back to the light guide plate body 1, so that the light can be emitted outward from the light-emitting surface of the light guide plate body 1, thereby reducing the loss of light transmission by the light guide plate body 1.
[0038] Furthermore, a groove 23 is provided between the first protrusion 21 and the second protrusion 22. The groove 23 is located at 1 / 3 of the straight path between the first protrusion 21 and the second protrusion 22. The groove 23 is used to adjust the light emitted between the first protrusion 21 and the second protrusion 22, so that the light emitted between the first protrusion 21 and the second protrusion 22 can be extended after passing through the groove 23, thereby increasing the light flux of the first protrusion 21 and the second protrusion 22 and improving the light emission efficiency of the light guide plate.
[0039] This utility model embodiment provides a high-brightness light guide plate. By setting staggered first protrusions 21 and second protrusions 22 on the light-emitting surface of the light guide plate, and adjusting the distribution density of the protrusion structure 2 on the light-emitting surface of the light guide plate based on the distribution shape of the first protrusions 21 and second protrusions 22, the light emission efficiency of the light guide plate is made uniform.
[0040] Furthermore, the above description provides a detailed introduction to a high-brightness light guide plate provided by the embodiments of this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. A high-brightness light guide plate, characterized in that, The high-brightness light guide plate includes: a light guide plate body and a plurality of protrusion structures disposed on the light guide plate body; The convex structure includes several first convex points and several second convex points, wherein the first convex points and the second convex points are arranged in an alternating queue; The first convex point forms an equilateral triangle with the two adjacent second convex points, and / or the first convex point forms an isosceles triangle with the two adjacent second convex points.
2. The high-brightness light guide plate as described in claim 1, characterized in that, The first convex point has a convex height of h1, and the second convex point has a convex height of h2. The constraint relationship between h1 and h2 is: h2 ≤ h1 ≤ 1.2 h2.
3. The high-brightness light guide plate as described in claim 1, characterized in that, The distance between the first protrusion and the adjacent second protrusion is h3, and the constraint relationship of h3 is: 0.1mm≤h3≤0.5mm, or the constraint relationship of h3 is: 0.01mm≤h3≤0.08mm.
4. The high-brightness light guide plate as described in claim 1, characterized in that, The light guide plate is provided with a light source guiding area and a light guide outer area. The distribution density of several protrusion structures located in the light source guiding area is less than the distribution density of several protrusion structures located in the light guide outer area.
5. The high-brightness light guide plate as described in claim 1, characterized in that, The light guide plate is made of PMMA material.
6. The high-brightness light guide plate as described in claim 1, characterized in that, The material of the protrusion structure is a resin layer.
7. The high-brightness light guide plate as described in claim 4, characterized in that, The thickness of the convex structure located in the light guide area of the light source is H1, and the diameter of the convex is D1. The constraint relationship between H1 and D1 is: 0.3≤H1 / D1≤0.
4.
8. The high-brightness light guide plate as described in claim 4, characterized in that, The thickness of the convex structure located in the outer region of the light guide is H2, and the diameter of the convex structure is D2. The constraint relationship between H2 and D2 is: 0.4 < H2 / D2 ≤ 0.
8.
9. The high-brightness light guide plate as described in claim 1, characterized in that, The light guide plate also includes a reflective film, which is attached to the back of the light guide plate body.
10. The high-brightness light guide plate as described in claim 1, characterized in that, A groove is provided between the first protrusion and the second protrusion, and the groove is distributed at 1 / 3 position of the straight path between the first protrusion and the second protrusion.