Peep-proof light guide plate with high light extraction rate

Abstract

The utility model relates to the technical field of light guide plates, in particular to a peep-proof light guide plate with high light extraction rate, which comprises a support used for fixing a light guide plate main body, the support comprises a support frame and an end cover used for closing an end face opening of the support frame, and the support frame and the end cover are fixed through an elastic structure. A light-emitting part attached to the light guide plate body is further arranged in the supporting frame. Wherein a wire winding structure is arranged on the side face of the supporting frame, the wire winding structure is used for winding a connecting wire of the light-emitting part, peep-proof structures are distributed on the light-emitting face and the light-reflecting face of the light guide plate body, and the light guide plate and the light-emitting part are convenient to disassemble and assemble due to the fact that the end covers are disassembled. And the connecting wire can be separately wound through the connecting part and the separating part, so that the situation that the connecting wire is wound and knotted due to lack of winding measures is avoided, and the situation that the connecting wire is burnt out due to heat accumulation caused by accumulation is avoided.

Description

Technical Field

[0001] This utility model relates to the field of light guide plate technology, and in particular to a high light output eavesdropping privacy light guide plate. Background Technology

[0002] A light guide plate is a high-tech product made of optical-grade acrylic or PC sheets. Its design principle is mainly derived from the LCD screen technology of laptops. The light guide plate guides and disperses light by printing light guide points on the bottom surface of the sheet using laser engraving, V-shaped cross grid engraving, or UV screen printing technology.

[0003] In daily life, to protect personal privacy and prevent information leakage, privacy protection functions can be implemented on display devices. For example, Chinese Patent Publication No. CN219065788U discloses a privacy light guide plate, comprising: an arc-shaped structure and a shielding structure. Multiple arc-shaped structures are fixedly and spaced apart on the light-emitting surface of the light guide plate. Multiple shielding structures are fixedly and permanently disposed on the light-emitting surface of the light guide plate. A shielding structure is fixedly disposed between any two adjacent arc-shaped structures. The shielding surface of the shielding structure is perpendicular to the light-emitting surface. The light guide plate is suitable for placement in a backlight module. By placing the light guide plate in the backlight module, there is no need to place a privacy film on the surface of the LCD screen or the backlight module of the LCD screen, reducing the overall assembly thickness. Simultaneously, eliminating the privacy film reduces costs and prevents assembly defects caused by assembling a privacy film.

[0004] In actual operation, the light guide plate and light strip are supported and fixed by the back plate and bracket. However, it is not convenient to disassemble and fix the back plate and bracket, which affects the disassembly and assembly efficiency of the light guide plate and light strip. In addition, the light strip is connected to the power supply through the connecting wire, but there is no measure to rewind the connecting wire, which makes it easy for the connecting wire to become tangled and knotted. Utility Model Content

[0005] The purpose of this utility model is to solve the shortcomings of the prior art, such as the inconvenience of disassembling and fixing the back plate and the inability to rewind the connecting wires, and to propose a high light output privacy light guide plate.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design a high light output privacy light guide plate, including a bracket for fixing the main body of the light guide plate. The bracket includes a support frame and an end cap for closing the end face opening of the support frame. The support frame and the end cap are fixed together by an elastic structure. A light-emitting element is also provided inside the support frame and is fitted to the main body of the light guide plate.

[0008] The support frame has a winding structure on its side, which is used to wind up the connecting wire of the light-emitting element. Anti-peeping structures are distributed on both the light-emitting surface and the reflective surface of the light guide plate body.

[0009] Furthermore, the elastic structure includes a limiting protrusion, and the support frame has at least one limiting protrusion on each of its two ends, and a deformation groove is also provided on the side of one end, the deformation groove being formed on both sides of the limiting protrusion.

[0010] Furthermore, the end cap has a U-shaped structure and a through groove on its end face. The through groove avoids the light-emitting surface of the light guide plate body and abuts against both sides of the light guide plate body. At the two bends of the end cap, there are also slots that engage with the limiting protrusions.

[0011] Furthermore, the winding structure includes a connecting portion, and a pair of recessed grooves are symmetrically provided on the side of the support frame. The gap between the pair of recessed grooves forms the connecting portion. Several partition portions are integrally formed on both sides of the connecting portion, and the connecting wire is wound around the periphery of the connecting portion at intervals through the partition portions.

[0012] Furthermore, the other end of the partition is fitted with the recessed groove with a gap, and the connecting line is disposed in the recessed groove by abutting deformation with the partition.

[0013] Furthermore, optical films and reflectors are provided on the light-emitting surface and the backlight surface of the light guide plate body.

[0014] The present invention proposes a high light output anti-peeping light guide plate, which has the following advantages: The present invention uses a pressing limit protrusion in conjunction with a deformation groove to drive the limit protrusion to be recessed, and the end cap can be disassembled to facilitate the disassembly and assembly of the light guide plate and the light-emitting component. It also facilitates the cleaning of internal dust and extends the service life of the light guide plate. Furthermore, the connecting part and the dividing part can separate and rewind the connecting wires, which firstly avoids the connection wires from getting tangled and knotted due to lack of winding measures, and secondly, the separation and rewinding method avoids the accumulation of connecting wires, which can lead to heat accumulation and burnout, and reduces the installation space inside the light-emitting mold. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

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

[0017] Figure 3 for Figure 2 A magnified structural diagram of area A;

[0018] Figure 4 This is a cross-sectional view of the present invention.

[0019] In the diagram: 1. Light guide plate body; 2. Bracket; 21. Support frame; 22. End cap; 221. Through groove; 222. Slot; 3. Elastic structure; 31. Limiting protrusion; 32. Deformation groove; 4. Light-emitting element; 5. Winding structure; 51. Connecting part; 52. Recessed groove; 53. Separating part; 6. Anti-peeping structure; 7. Optical film; 8. Reflector. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figure 1-4 A high light output privacy light guide plate includes a bracket 2 for fixing the light guide plate body 1. The bracket 2 includes a support frame 21 and an end cap 22 for closing the end face opening of the support frame 21. The support frame 21 and the end cap 22 are fixed together by an elastic structure 3. A light-emitting element 4 is also provided inside the support frame 21 and is fitted to the light guide plate body 1.

[0022] The support frame 21 has a winding structure 5 on its side, which is used to wind up the connecting wire of the light-emitting element 4. Anti-peeping structures 6 are distributed on both the light-emitting surface and the reflective surface of the light guide plate body 1.

[0023] It should be added that the privacy structure 6 is the prior art in the prior art document, specifically including an arc structure and a shielding structure. The light guide plate body 1 is provided with a number of arc structures at intervals on the light-emitting surface, and the shielding structure is provided between the arc structures on adjacent sides. The light guide plate body 1 is also provided with a reflective structure corresponding to the arc structure on the reflective surface.

[0024] Furthermore, the light-emitting element 4 is a light strip in the prior art. The light guide plate guides and disperses light by using laser engraving, V-shaped cross grid engraving or UV screen printing technology to print light guide points on the bottom surface of the plate. With a reasonable layout of light guide points, good light source of light-emitting element 4, and multiple light-emitting elements 4, the light output rate of the light guide plate body 1 can be effectively improved.

[0025] Furthermore, the elastic structure 3 includes a limiting protrusion 31. The support frame 21 has at least one limiting protrusion 31 on each of its two ends, and a deformation groove 32 is also provided on the side of one end. The deformation groove 32 is formed on both sides of the limiting protrusion 31.

[0026] Furthermore, the end cap 22 has a U-shaped structure and a through groove 221 on its end face. The through groove 221 avoids the light-emitting surface of the light guide plate body 1 and abuts against both sides of the light guide plate body 1. At the two ends of the end cap 22, there are also slots 222 that engage with the limiting protrusion 31.

[0027] Specifically, the support frame 21 is used to support and fix the light guide plate body 1, and the light guide plate body 1 is set in the backlight module by fixing. The support frame 21 is preferably made of a material with deformation capability, such as rubber or plastic.

[0028] Furthermore, the top of the limiting protrusion 31 on the side away from the support frame 21 is inclined downwards to form a slope. The limiting protrusion 31 uses this slope to reduce the friction generated when it slides against the end cap 22.

[0029] More specifically, the winding structure 5 includes a connecting part 51, and a pair of recessed grooves 52 are symmetrically provided on the side of the support frame 21. The gap between the pair of recessed grooves 52 forms the connecting part 51. Several partitions 53 are integrally formed on both sides of the connecting part 51, and the connecting wire is wound around the periphery of the connecting part 51 at intervals through the partitions 53.

[0030] In general, the other end of the partition 53 is in clearance fit with the recessed groove 52, and the connecting line is disposed in the recessed groove 52 by abutting deformation with the partition 53.

[0031] It is worth mentioning that there is a gap fit between the partition 53 and the recessed groove 52, and the outer periphery of the connecting wire is covered with a rubber protective layer. The connecting wire utilizes the rubber protective layer and the deformable feature of the partition 53 to slide in the recessed groove 52 by contact, preventing the connecting wire from detaching from the connecting part 51.

[0032] The connecting part 51 separates the connecting wires through the dividing part 53 to prevent the connecting wires from accumulating and tangling, causing them to overheat and burn out.

[0033] Finally, optical films 7 and reflective plates 8 are also provided on the light-emitting surface and the backlight surface of the light guide plate body 1.

[0034] Operating principle: During operation, multiple arc-shaped structures are set on the light-emitting surface. These arc-shaped structures concentrate the light emitted by the LED strips towards the frontal viewing angle of the backlight module. Large-angle deflected light emitted by the arc-shaped structures is blocked by the shielding structure to prevent the large-angle deflected light from escaping. This ensures that the light guide plate has sufficient brightness when viewed from the front, but low brightness when viewed from the sides, rendering it unusable. This achieves a privacy protection effect.

[0035] Then, the reflector 8, the light guide plate body 1 and the optical film 7 are placed in the support frame 21. The end cover 22 is fixed by engaging the limiting protrusion 31 with the slot 222. The end cover 22 closes the end opening of the support frame 21, thereby achieving the function of placing the light guide plate body 1 in the backlight module.

[0036] Furthermore, by pressing the limiting protrusion 31 with the deformation groove 32, the limiting protrusion 31 can be disengaged from the slot 222, and the end cover 22 can be unlocked.

[0037] Finally, the connector of the light-emitting element 4 is set in the recessed groove 52 by deforming in contact with the partition 53, and the connecting wire is then wound around the connecting part 51 through the partition 53 to wind up the connecting wire.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high light output privacy light guide plate, comprising a bracket (2) for fixing the light guide plate body (1), characterized in that: The bracket (2) includes a support frame (21) and an end cap (22) for closing the end face opening of the support frame (21). The support frame (21) and the end cap (22) are fixed together by an elastic structure (3). A light-emitting element (4) is also provided inside the support frame (21) and is fitted to the light guide plate body (1). The support frame (21) is provided with a winding structure (5) on its side. The winding structure (5) is used to wind up the connecting line of the light-emitting element (4). Anti-peeping structures (6) are distributed on the light-emitting surface and the reflective surface of the light guide plate body (1).

2. The high light output eavesdropping privacy light guide plate according to claim 1, characterized in that: The elastic structure (3) includes a limiting protrusion (31). The support frame (21) has at least one limiting protrusion (31) on each of its two ends, and a deformation groove (32) is provided on one of its ends. The deformation groove (32) is opened on both sides of the limiting protrusion (31).

3. A high light output eavesdropping privacy light guide plate according to claim 2, characterized in that: The end cap (22) has a U-shaped structure and a through groove (221) on its end face. The through groove (221) avoids the light-emitting surface of the light guide plate body (1) and abuts against both sides of the light guide plate body (1). The two ends of the end cap (22) are also provided with slots (222) that engage with the limiting protrusion (31).

4. A high light output eavesdropping privacy light guide plate according to claim 1, characterized in that: The winding structure (5) includes a connecting part (51). A pair of recessed grooves (52) are symmetrically provided on the side of the support frame (21). The gap between the pair of recessed grooves (52) forms the connecting part (51). Several partitions (53) are integrally formed on both sides of the connecting part (51). The connecting wire is wound around the periphery of the connecting part (51) at intervals through the partitions (53).

5. A high light output eavesdropping privacy light guide plate according to claim 4, characterized in that: The other end of the partition (53) is fitted with the recessed groove (52) with a clearance, and the connecting line is disposed in the recessed groove (52) by abutting deformation with the partition (53).

6. A high light output eavesdropping privacy light guide plate according to claim 1, characterized in that: An optical film (7) and a reflector (8) are also provided on the light-emitting surface and the backlight surface of the light guide plate body (1).

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