Double-sided hot-pressed light guide plate

Abstract

The utility model discloses a kind of light guide plates of double-sided hot pressing belong to light guide plate technical field, wherein including light guide plate body, the light guide plate body has oppositely arranged first light area surface and second light area surface, multiple microstructures with uniform distribution are provided side by side on first light area surface, microstructure surface is equipped with hot-pressing structure two of hot-pressing forming, hot-pressing structure one of hot-pressing forming is provided on second light area surface, microstructure cross section is semicircular type, the cross section of microstructure is perpendicular to incident light, microstructure is set with equal interval, hot-pressing structure two is shuttle shape and randomly distributed on microstructure, long axis of hot-pressing structure two is perpendicular to incident light, hot-pressing structure two distribution is sparse on first light area surface close to light source, the place far from light source hot-pressing structure two density gradually increases, the device solves the current light guide plate light emission uneven problem and improves the utilization of light.

Description

Technical Field

[0001] This utility model belongs to the field of light guide plate technology, specifically relating to a double-sided hot-pressed light guide plate. Background Technology

[0002] As a core component of backlight modules, light guide plates convert light emitted from point or line light sources into surface light sources, and are widely used in displays, lighting equipment, and other fields. Most existing light guide plates employ single-layer or multi-layer structures, with single-layer light guide plates being widely used due to their simple structure and lower cost.

[0003] Existing single-layer light guide plates mostly employ a single-sided microstructure design for their light domain surface. They achieve light refraction and scattering by setting structures such as dots and stripes on a single surface. However, these light guide plates generally suffer from limited scattering effects, failing to effectively block lamp shadows and making it difficult to achieve uniform light output across the entire plate surface. Therefore, this phenomenon has become a problem that urgently needs to be solved by those in the field. Utility Model Content

[0004] The purpose of this invention is to provide a double-sided hot-pressed light guide plate to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a double-sided hot-pressed light guide plate, comprising a light guide plate body, wherein the light guide plate body has a first light domain surface and a second light domain surface arranged opposite to each other, a plurality of microstructures are arranged side by side on the first light domain surface, and a second hot-pressed structure is provided on the surface of the microstructures, and a first hot-pressed structure is provided on the second light domain surface.

[0006] The present invention further describes that the cross-section of the microstructure is semi-circular, the cross-section of the microstructure is perpendicular to the incident light, the diameter of the cross-section of the microstructure is 10-50μm, and the microstructures are evenly spaced.

[0007] The present invention further explains that the second hot-pressed structure is spindle-shaped and randomly distributed on the microstructure. The long axis of the second hot-pressed structure is perpendicular to the incident light. The length of the long axis of the spindle is 100-200 μm, and the length of the short axis of the spindle is 60-90 μm.

[0008] The present invention further explains that the hot-pressed structures 2 are sparsely distributed near the light source on the first light domain surface, and the density of the hot-pressed structures 2 gradually increases in the area away from the light source. The total area of ​​the hot-pressed structures 2 accounts for 3% to 25% of the area of ​​the first light domain surface.

[0009] This invention further explains that the hot-pressed structure II is distributed in a straight line on the side of the first optical domain surface near the incident light.

[0010] The present invention further explains that the hot-pressed structure includes a crater structure and a spindle structure. The crater structure and the spindle structure are randomly distributed on the second light domain surface. The hot-pressed structure is sparsely distributed near the light source on the second light domain surface, and the density of the hot-pressed structure gradually increases in the area away from the light source.

[0011] The present invention further describes that the crater structure includes a first groove, a second groove, and a protrusion. The protrusion is located in the center of the crater structure. The protrusion is cylindrical in shape, with a diameter of 20-40 μm and a height of 3-5 μm. The first groove is an annular groove located on the outer ring of the protrusion. The diameter of the annular groove is 50-60 μm and the depth is 3-4 μm. The second groove is located in the center of the protrusion and has a depth of 2-3 μm. The outer circle of the first groove forms an overflow edge on the second optical domain surface.

[0012] The present invention further explains that the light guide plate body is provided with a light-inlet surface, and the incident light emitted by the light source enters the light guide plate body from the light-inlet surface.

[0013] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: This utility model, by setting a second hot-pressed structure formed on a microstructure, can significantly enhance light scattering, amplify the reflection angle, avoid bright spots caused by directional light propagation, and reduce lamp shadows; by setting a first hot-pressed structure composed of a crater structure and a spindle structure, it can further reflect and homogenize light, reduce light loss, and improve light utilization; by setting a gradient distribution of the first hot-pressed structure, which is sparse near the light source, it can suppress strong light concentration and avoid local glare, while being dense away from the light source, it can retain light energy, compensate for tail brightness, and ensure the uniformity of light output. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is the utility model Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the second optical domain surface structure of this utility model; Figure 4 This is the utility model Figure 3 Enlarged view of point B in the middle; In the figure: 1. Light guide plate body; 2. First light domain surface; 3. Second light domain surface; 4. Microstructure; 5. Hot-pressed structure one; 6. Light-entry surface; 7. Hot-pressed structure two; 8. Crater structure; 9. Spindle structure; 10. Groove one; 11. Protrusion; 12. Groove two; 13. Overflow edge. Detailed Implementation

[0015] The following detailed, non-limiting description of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0016] Please see Figure 1-4 The present invention provides a technical solution: a double-sided hot-pressed light guide plate, including a light guide plate body 1. The light guide plate body 1 has a first light domain surface 2 and a second light domain surface 3 arranged opposite to each other. A plurality of microstructures 4 are arranged side by side on the first light domain surface 2. A hot-pressed structure 7 is provided on the surface of the microstructures 4. A hot-pressed structure 5 is provided on the second light domain surface 3.

[0017] The cross-section of microstructure 4 is semi-circular, perpendicular to the light source, and has a diameter of 10-50 μm. Microstructures 4 are evenly spaced.

[0018] The second hot-pressed structure 7 is spindle-shaped and randomly distributed on the microstructure 4. The long axis of the second hot-pressed structure 7 is perpendicular to the incident light. The length of the spindle is 100-200 μm and the width of the spindle is 60-90 μm. The second hot-pressed structure 7 is sparsely distributed near the light source on the first optical domain surface 2, and the density of the second hot-pressed structure 7 gradually increases away from the light source. The total area of ​​the second hot-pressed structure 7 accounts for 3% to 25% of the area of ​​the first optical domain surface 2. The second hot-pressed structure 7 is distributed in a straight line on the side of the first optical domain surface 2 near the incident light.

[0019] The hot-pressed structure 5 includes a crater structure 8 and a spindle structure 9. The crater structure 8 and the spindle structure 9 are randomly distributed on the second light domain surface 3. The hot-pressed structure 5 is sparsely distributed near the light source on the second light domain surface 3, and the density of the hot-pressed structure 5 gradually increases in the area away from the light source.

[0020] The crater structure 8 includes a first groove 10, a second groove 12, and a protrusion 11. The protrusion 11 is located in the center of the crater structure 8. The protrusion 11 is cylindrical in shape, with a diameter of 20-40 μm and a height of 3-5 μm. The first groove 10 is an annular groove located on the outer ring of the protrusion 11. The diameter of the annular groove is 50-60 μm and the depth is 3-4 μm. The second groove 12 is located in the center of the protrusion 11 and has a depth of 2-3 μm. The outer ring of the first groove 10 forms an overflow edge 13 on the second optical domain surface 3. The light guide plate body 1 is provided with a light-inlet surface 6, and the incident light emitted by the light source enters the light guide plate body 1 through the light-inlet surface 6.

[0021] Working principle: Incident light emitted from the light source enters the light guide plate body 1 from the side of the light-inlet surface 6. After entering the light guide plate body 1, the light propagates along its length. During propagation, when the light comes into contact with the first light domain surface 2, the uniformly distributed semi-elliptical microstructures 4 first refract the light. The spindle-shaped hot-pressed structure 7 on its surface can significantly enhance the refractive index of the light and amplify the reflection angle, avoiding bright spots caused by directional light propagation. At the same time, the sparse hot-pressed structure 5 near the light source breaks the total internal reflection of strong light, avoiding glare. The gradually denser hot-pressed structure 5 far from the light source can reduce light loss and compensate for light intensity attenuation. It not only offsets the edge light intensity attenuation, but also further disperses the concentrated light through the reflection of the concave and convex structure, effectively blocking the lamp shadow. The synergistic effect of the hot-pressed structure on the first light domain surface 2 and the second light domain surface 3 causes the light to be scattered and reflected multiple times within the plate before being uniformly emitted from the entire plate surface. This can effectively improve the light utilization rate, increase the brightness by 7%-15%, and ultimately achieve a surface light source effect with no lamp shadow and high uniformity.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A double-sided hot-pressed light guide plate, comprising a light guide plate body (1), characterized in that: The light guide plate body (1) has a first light domain surface (2) and a second light domain surface (3) arranged opposite to each other. A plurality of microstructures (4) are arranged side by side on the first light domain surface (2). A second hot-pressed structure (7) is provided on the surface of the microstructure (4). A first hot-pressed structure (5) is provided on the second light domain surface (3).

2. The double-sided hot-pressed light guide plate according to claim 1, characterized in that: The microstructure (4) has a semi-circular cross-section, the cross-section of the microstructure (4) is perpendicular to the incident light, the diameter of the cross-section of the microstructure (4) is 10-50μm, and the microstructures (4) are arranged at equal intervals.

3. The double-sided hot-pressed light guide plate according to claim 2, characterized in that: The second hot-pressed structure (7) is spindle-shaped and randomly distributed on the microstructure (4). The long axis of the second hot-pressed structure (7) is perpendicular to the incident light. The length of the long axis of the spindle is 100-200 μm, and the length of the short axis of the spindle is 60-90 μm.

4. A double-sided hot-pressed light guide plate according to claim 2, characterized in that: The hot-pressed structure 2 (7) is sparsely distributed near the light source on the first light domain surface (2), and the density of the hot-pressed structure 2 (7) gradually increases away from the light source. The total area of ​​the hot-pressed structure 2 (7) accounts for 3% to 25% of the area of ​​the first light domain surface (2).

5. A double-sided hot-pressed light guide plate according to claim 3, characterized in that: The hot-pressed structure 2 (7) is distributed on the side of the first optical field surface (2) near the incident light to form a straight line.

6. A double-sided hot-pressed light guide plate according to any one of claims 1-5, characterized in that: The hot-pressed structure (5) includes a crater structure (8) and a spindle structure (9). The crater structure (8) and the spindle structure (9) are randomly distributed on the second light domain surface (3). The hot-pressed structure (5) is sparsely distributed near the light source on the second light domain surface (3), and the density of the hot-pressed structure (5) gradually increases in the area away from the light source.

7. A double-sided hot-pressed light guide plate according to claim 6, characterized in that: The crater structure (8) includes a first groove (10), a second groove (12), and a protrusion (11). The protrusion (11) is located in the center of the crater structure (8). The protrusion (11) is cylindrical in shape, with a diameter of 20-40 μm and a height of 3-5 μm. The first groove (10) is an annular groove located on the outer ring of the protrusion (11). The diameter of the annular groove is 50-60 μm and the depth is 3-4 μm. The second groove (12) is located in the center of the protrusion (11). The depth of the second groove (12) is 2-3 μm. The outer circle of the first groove (10) forms an overflow edge (13) on the second light domain surface (3).

8. A double-sided hot-pressed light guide plate according to claim 7, characterized in that: The light guide plate body (1) is provided with a light-inlet surface (6), and the incident light emitted by the light source enters the light guide plate body (1) from the light-inlet surface (6).

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