High-brightness bidirectional dot light guide plate

Abstract

The utility model relates to light guide plate technical field discloses a kind of high-brightness bidirectional dot light guide plate, including reflector body, the two sides of reflector body are light exit surface and reflection surface respectively, multiple groups of astigmatic structure are provided on light exit surface, and multiple groups of astigmatic structure are set in rectangular array, multiple groups of light diffusion microstructure are provided on reflection surface;Through the cooperation between light guide plate body, astigmatic structure, light diffusion microstructure, reflection surface and light exit surface, through the astigmatic structure of rectangular array, light can be dispersed and handled, so that light is evenly emitted on light exit surface, and light diffusion microstructure, which is alternately arranged on reflection surface, gradually increases from incident light surface to far end, can gradually adjust the reflection direction of light according to the incidence angle and path of light, further optimizes light distribution, reduces light-dark difference, can avoid light interference between adjacent structures, and improves illumination brightness.

Description

Technical Field

[0001] This utility model relates to the field of light guide plate technology, specifically a high-brightness bidirectional dot light guide plate. Background Technology

[0002] A light guide plate uses transparent light guide materials such as polymethyl methacrylate (PMMA) or polycarbonate (PC) to guide light emitted from a light source into the plate. The light diffuses across the entire surface of the plate, and after the light shines on the microstructures on the reflective surface of the light guide plate, it transforms the traditional diffuse reflection light guide into a surface reflection light guide. The light will then exit from the light-emitting surface of the light guide plate and pass through various microstructures of different densities, sizes, and shapes to obtain a flat plate with uniform light emission.

[0003] In the prior art, Chinese utility model application number CN202421174588.8 discloses a high-brightness light guide plate, including a light guide body and at least one side reflector; the side reflector is connected to at least one side of the light guide body; and the side reflector facing the light guide body has a reflective curved surface; the light guide body has at least one mounting groove; the mounting groove is used to mount a light source.

[0004] Although this utility model can improve the brightness of the light guide plate by utilizing the side reflection part, the light guide bumps are continuously and uniformly distributed, which easily causes bright and dark stripes of light. Furthermore, the lack of a light diffusion microstructure at the interface between the light-transmitting layer and the light-emitting layer can lead to glare. Therefore, we need to propose a high-brightness bidirectional dot light guide plate. Utility Model Content

[0005] The purpose of this invention is to provide a high-brightness bidirectional dot light guide plate. By setting an array of light diffusion microstructures in the light guide plate, the uniformity of light diffusion is improved, bright and dark stripes are avoided from being generated when light is emitted, and the light brightness is increased while light loss is reduced, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-brightness bidirectional dot light guide plate, comprising a reflector body, wherein the two sides of the reflector body are a light-emitting surface and a reflective surface, respectively; multiple sets of light-scattering structures are provided on the light-emitting surface, and the multiple sets of light-scattering structures are arranged in a rectangular array; multiple sets of light-diffusing microstructures are provided on the reflective surface, and the multiple sets of light-diffusing microstructures are arranged alternately; the side of the reflector body adjacent to the light-emitting surface and the reflective surface is set as the incident light surface; the volume of the multiple sets of light-diffusing microstructures gradually increases from near the incident light surface to far away from the incident light surface, thereby achieving surface reflection and light guiding of the light source.

[0007] Preferably, the light diffusion microstructure includes a first light-facing surface, a second light-facing surface, a third light-facing surface, and a backlighting surface. The first light-facing surface and the backlighting surface are arranged opposite to each other, the second light-facing surface and the third light-facing surface are arranged opposite to each other, and the first light-facing surface is close to the incident light surface.

[0008] Preferably, the two edges of the first light-facing surface are connected to the second light-facing surface and the third light-facing surface, respectively, and the two edges of the backlighting surface are connected to the second light-facing surface and the third light-facing surface, respectively. A flat light-emitting surface is provided at the end of the first light-facing surface, the second light-facing surface, the third light-facing surface and the backlighting surface that are close to each other, and the flat light-emitting surface is arranged parallel to the light-emitting surface.

[0009] Preferably, the reflective surface is provided with multiple sets of hemispheres, and the multiple sets of hemispheres are arranged alternately with multiple sets of light-diffusing microstructures.

[0010] Preferably, the incident light surface of the reflector body is provided with multiple sets of light sources, and the multiple sets of light sources are arranged at equal intervals.

[0011] Preferably, the reflector body has two sides adjacent to the incident light surface as side reflective surfaces, the angle between the side reflective surface and the reflecting surface is acute, and the angle between the side reflective surface and the light emitting surface is obtuse.

[0012] Preferably, the astigmatic structure includes two sets of first astigmatic surfaces and two sets of second astigmatic surfaces arranged opposite to each other, and the two sets of first astigmatic surfaces are alternately arranged with the two sets of second astigmatic surfaces. The light-emitting surface is provided with grooves that separate multiple sets of astigmatic structures, and the multiple sets of grooves are arranged at equal intervals.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention mainly utilizes the coordination between the light guide plate body, the light-diffusing structure, the light-diffusing microstructure, the reflective surface, and the light-emitting surface. Through the rectangular array of light-diffusing structures, the light can be dispersed, allowing the light to be emitted uniformly from the light-emitting surface. Furthermore, the light-diffusing microstructures, which are alternately arranged on the reflective surface with their volume gradually increasing from the incident light surface to the far end, can gradually adjust the light reflection direction according to the incident angle and path of the light, further optimizing the light distribution, reducing differences in brightness, avoiding light interference between adjacent structures, and improving the brightness of the light illumination. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the reflective surface structure of this utility model;

[0017] Figure 3 This is a schematic cross-sectional view of the internal light diffusion microstructure of the reflector body of this utility model.

[0018] Figure 4 This is a schematic diagram of the reflective surface structure on the upper side of the reflector body of this utility model;

[0019] Figure 5 for Figure 1 Enlarged structural diagram of point A;

[0020] Figure 6 This is a schematic diagram of the light diffusion microstructure of this utility model.

[0021] In the diagram: 1. Reflector body; 2. Light source; 3. Light-emitting surface; 31. Groove; 4. Reflective surface; 5. Side reflective surface; 6. Diffusion structure; 61. First diffusing surface; 62. Second diffusing surface; 7. Light diffusion microstructure; 71. Surface with flat light; 72. First light-facing surface; 73. Second light-facing surface; 74. Third light-facing surface; 75. Backlighting surface; 8. Hemisphere; 9. Incident light surface. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-6 This utility model provides a technical solution: a high-brightness bidirectional dot light guide plate, including a reflector body 1, with a light-emitting surface 3 and a reflective surface 4 on both sides of the reflector body 1. The light-emitting surface 3 is provided with multiple sets of light-diffusing structures 6, which are arranged in a rectangular array. The reflective surface 4 is provided with multiple sets of light-diffusing microstructures 7, which are arranged alternately. The side of the reflector body 1 adjacent to the light-emitting surface 3 and the reflective surface 4 is set as the incident light surface 9. The volume of the multiple sets of light-diffusing microstructures 7 gradually increases from near the incident light surface 9 to far away from the incident light surface 9, thereby realizing surface reflection light guiding of the light source 2.

[0024] The light diffusion microstructure 7 includes a first light-facing surface 72, a second light-facing surface 73, a third light-facing surface 74, and a backlighting surface 75. The first light-facing surface 72 and the backlighting surface 75 are arranged opposite to each other, and the second light-facing surface 73 and the third light-facing surface 74 are arranged opposite to each other. The first light-facing surface 72 is close to the incident light surface 9. The first light-facing surface 72 can directly and preferentially reflect the incident light, and under the action of the second light-facing surface 73 and the third fluorescent surface, it can perform surface reflection of the incident light incident from the side, thereby improving the reflection effect of the incident light so that the incident light can be emitted from the light-emitting surface 3 with higher brightness.

[0025] The two edges of the first light-facing surface 72 are connected to the second light-facing surface 73 and the third light-facing surface 74, respectively. The two edges of the backlighting surface 75 are connected to the second light-facing surface 73 and the third light-facing surface 74, respectively. A flat light-reflecting surface 71 is provided at one end of the first light-facing surface 72, the second light-facing surface 73, the third light-facing surface 74 and the backlighting surface 75 that are close to each other. The flat light-reflecting surface 71 is arranged parallel to the light-emitting surface 3 and can receive incident light from different angles. Together with the backlighting surface 75 and the flat light-reflecting surface 71, the light is reflected and guided to the light-emitting surface 3.

[0026] Multiple hemispheres 8 are arranged on the reflective surface 4. The multiple hemispheres 8 are arranged alternately with multiple light-diffusing microstructures 7. The curved surface reflection characteristics of the hemispheres 8 can complement the planar reflection of the light-diffusing microstructures 7, further diffusing and homogenizing the light.

[0027] Multiple light sources 2 are provided on the incident light surface 9 side of the reflector body 1, and the multiple light sources 2 are arranged at equal intervals. By using the multiple light sources 2 arranged at equal intervals, the incident light is uniform, thereby ensuring the uniform brightness of the reflector.

[0028] The reflector body 1 is equipped with side reflective surfaces 5 on both sides adjacent to the incident light surface 9. The angle between the side reflective surface 5 and the reflective surface 4 is acute, and the angle between the side reflective surface 5 and the light-emitting surface 3 is obtuse. The side reflective surface 5 forms an acute angle with the reflective surface 4 and an obtuse angle with the light-emitting surface 3, which can effectively reflect the incident light from the side, reduce light leakage, and allow more light to participate in the light guiding process.

[0029] The astigmatic structure 6 includes two sets of first astigmatic surfaces 61 and two sets of second astigmatic surfaces 62 arranged opposite to each other. The two sets of first astigmatic surfaces 61 and the two sets of second astigmatic surfaces 62 are arranged alternately. The light-emitting surface 3 is provided with slots 31 that separate the multiple sets of astigmatic structures 6. The multiple sets of slots 31 are arranged at equal intervals. The first astigmatic surfaces 61 and the second astigmatic surfaces 62 can balance the light emitted from the slots 31 of the light-emitting surface 3, thereby avoiding light interference between adjacent structures, allowing each astigmatic structure 6 to work independently, and improving the overall optical performance.

[0030] When light source 2 emits light, the light emitted from light source 2 enters the interior of the light guide plate body from the incident light surface 9. The first light-facing surface 72 of the light-diffusing microstructure 7 on the reflecting surface 4 receives the incident light first. Due to its special geometry and arrangement, other scattered light rays are reflected to the second light-facing surface 73, the third light-facing surface 74, the backlight surface 75, and the planar light-facing surface 71, and are simultaneously guided outwards to the light surface 3 along with the first light-facing surface 72. As the light-diffusing microstructure 7 gradually increases in volume from near to far from the incident light surface 9, it can diffuse light at different positions. The light is differentiated and converged, and the light is further diffused by the alternating hemispheres 8. The side reflective surface 5 forms an acute angle with the reflective surface 4 and an obtuse angle with the light-emitting surface 3, reflecting the side light back into the light guide plate body for reuse, reducing light loss. When the light is transmitted to the light-emitting surface 3, the rectangular array of diffusing structures 6 and the slots 31 disperse the light through the first diffusing surface 61 and the second diffusing surface 62, avoiding uneven brightness caused by concentrated light, realizing the uniformity of bidirectional light transmission, thereby improving the output brightness.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-brightness bidirectional dot light guide plate, comprising a reflector body (1), characterized in that: The reflector body (1) has a light-emitting surface (3) and a reflective surface (4) on its two sides. The light-emitting surface (3) is provided with multiple sets of light-scattering structures (6), and the multiple sets of light-scattering structures (6) are arranged in a rectangular array. The reflective surface (4) is provided with multiple sets of light-diffusing microstructures (7), and the multiple sets of light-diffusing microstructures (7) are arranged alternately. The side of the reflector body (1) adjacent to the light-emitting surface (3) and the reflective surface (4) is set as the incident light surface (9). The volume of the multiple sets of light-diffusing microstructures (7) gradually increases from the side closer to the incident light surface (9) to the side farther away from the incident light surface (9), thereby realizing surface reflection and light guiding of the light source (2).

2. The high-brightness bidirectional dot light guide plate according to claim 1, characterized in that: The light diffusion microstructure (7) includes a first light-facing surface (72), a second light-facing surface (73), a third light-facing surface (74), and a backlighting surface (75). The first light-facing surface (72) and the backlighting surface (75) are arranged opposite to each other, the second light-facing surface (73) and the third light-facing surface (74) are arranged opposite to each other, and the first light-facing surface (72) is close to the incident light surface (9).

3. A high-brightness bidirectional dot light guide plate according to claim 2, characterized in that: The two edges of the first light-facing surface (72) are connected to the second light-facing surface (73) and the third light-facing surface (74) respectively. The two edges of the backlight surface (75) are connected to the second light-facing surface (73) and the third light-facing surface (74) respectively. A flat light-emitting surface (71) is provided at one end of the first light-facing surface (72), the second light-facing surface (73), the third light-facing surface (74) and the backlight surface (75) that are close to each other. The flat light-emitting surface (71) is arranged parallel to the light-emitting surface (3).

4. A high-brightness bidirectional dot light guide plate according to claim 3, characterized in that: The reflective surface (4) is provided with multiple sets of hemispheres (8), and the multiple sets of hemispheres (8) are alternately arranged with multiple sets of light diffusion microstructures (7).

5. A high-brightness bidirectional dot light guide plate according to claim 4, characterized in that: The reflector body (1) has multiple light sources (2) on the incident light surface (9) side, and the multiple light sources (2) are arranged at equal intervals.

6. A high-brightness bidirectional dot light guide plate according to claim 5, characterized in that: The reflector body (1) is provided with side reflective surfaces (5) on both sides adjacent to the incident light surface (9). The angle between the side reflective surface (5) and the reflecting surface (4) is acute, and the angle between the side reflective surface (5) and the light-emitting surface (3) is obtuse.

7. A high-brightness bidirectional dot light guide plate according to claim 6, characterized in that: The light-scattering structure (6) includes two sets of first light-scattering surfaces (61) and two sets of second light-scattering surfaces (62) arranged opposite to each other. The two sets of first light-scattering surfaces (61) are arranged alternately with the two sets of second light-scattering surfaces (62). The light-emitting surface (3) is provided with grooves (31) that separate multiple sets of light-scattering structures (6), and the multiple sets of grooves (31) are arranged at equal intervals.

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