Light guide plate structure for liquid crystal display screen

Abstract

The utility model discloses a light guide plate structure for a liquid crystal display screen, and relates to the technical field of liquid crystal display screens. The light guide plate comprises a supporting base, side supporting frames, a positioning top cover and a light guide plate body, a circuit board is clamped and fixed to the inner top of the supporting base, a silica gel heat conduction plate is bonded and fixed to the peripheral face of the circuit board, and a plurality of silica gel heat conduction fins are bonded and fixed to the bottom of the silica gel heat conduction plate; first reflecting plates are clamped and fixed to the two sides in the side supporting frame, and a positioning top cover is rotationally clamped to one end of the top of the side supporting frame. By arranging the supporting base, the side supporting frame, the positioning top cover and the light guide plate body, the problems that heat dissipation of a plurality of light sources of the light guide plate structure is difficult, power consumption is increased, the light guide plate body is thin and large in area, the light guide plate body is prone to damage due to stress and inconvenient to disassemble and replace are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid crystal display screens, in particular to a light guide plate structure for liquid crystal display screens. Background Art

[0002] Liquid crystal display is a type of flat panel display used for screen display of televisions and computers. Liquid crystal display uses a liquid crystal solution in two polarized materials. When electric current passes through the liquid, the crystals are rearranged to achieve the purpose of imaging. It has the advantages of low power consumption, small size, and low radiation. However, during the production and processing of liquid crystal display, it is usually necessary to install a light guide plate structure in a dark place. The light guide plate is made of optical-grade acrylic / PC sheet, and then uses high-tech materials with extremely high refractive index and non-light absorption. The bottom surface of the optical-grade acrylic sheet is printed with light guide points using laser engraving, V-shaped cross grid engraving, and UV screen printing technology. The optical-grade acrylic sheet is used to absorb the light emitted from the lamp and stay on the surface of the optical-grade acrylic sheet. When the light hits each light guide point, the reflected light will diffuse to all angles, and then destroy the reflection conditions and emit from the front of the light guide plate. Through various light guide points of different densities and sizes, the light guide plate can emit light evenly. The light guide plate has the distinctive features of ultra-thin, ultra-bright, uniform light guide, energy saving, environmental protection, no dark area, durability, not easy to yellow, simple and quick installation and maintenance, etc. However, it still has the following disadvantages in actual use:

[0003] Publication No. CN217932159U discloses a PS light guide plate for liquid crystal display screens. The outer surface of the light guide plate is provided with multiple light guide points, side mounting seats are provided on the outer surface of the light guide plate, and upper mounting seats are provided on the outer surface of the light guide plate. The light guide plate generally uses an LED light source, which generates a certain amount of heat during use. However, due to the overall thinness of the light guide plate, the volume of the LED light source is small, and the heat dissipation area is further reduced, making it difficult to quickly dissipate heat, thereby reducing the service life of the LED light source.

[0004] The light guide plate structure usually has light sources installed at multiple locations around it to ensure uniform brightness of the entire light guide plate. Multiple light sources will cause the light guide plate structure to heat up rapidly and increase the power consumption of the light guide plate structure when in use. At the same time, the light guide plate is easily damaged by accidental impact due to its extremely thin thickness and large area. The installation structure of the light guide plate is usually difficult to quickly disassemble from the light guide plate body, making it inconvenient to repair. Utility Model Content

[0005] The purpose of the utility model is to provide a light guide plate structure for liquid crystal display screens. By supporting a base, a side support frame, a positioning top cover and a light guide plate body, the utility model solves the problems of difficulty in heat dissipation of multiple light sources in the light guide plate structure, increased power consumption, thin thickness and large area of ​​the light guide plate body, easy damage under force and inconvenient disassembly and replacement.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The utility model discloses a light guide plate structure for a liquid crystal display screen, comprising a supporting base, a side supporting frame, a positioning top cover and a light guide plate body, wherein a circuit board is clamped and fixed to the top of the supporting base, a silicone heat conducting plate is adhesively fixed to the outer peripheral surface of the circuit board, a plurality of silicone heat conducting fins are adhesively fixed to the bottom of the silicone heat conducting plate, side supporting frames are welded and fixed to the top ends of the supporting base, a first reflective plate is clamped and fixed to the two sides of the side supporting frame, a positioning top cover is rotatably clamped to one end of the top of the side supporting frame, a second reflective plate is clamped and fixed to the bottom of the positioning top cover, and the light guide plate body is clamped between the supporting base, the side supporting frames and the positioning top cover;

[0008] The heat generated by the circuit board can be quickly transferred through the silicone heat conductive plate, and the heat dissipation area of ​​the silicone heat conductive plate can be greatly increased through the silicone heat conductive fins, thereby avoiding the circuit board and LED lamp beads from being overheated and resulting in a shortened service life. When the LED lamp beads are turned on, the first reflector and the second reflector can reflect the light scattered to the side support frame and the positioning top cover, so that the light guide plate body emits light evenly, and there is no need to set up multiple LED light sources, thereby reducing energy consumption. When installing the light guide plate body, it is only necessary to insert the light guide plate body between the two side support frames and make its bottom fit against the support base, then rotate the positioning top cover to close it and fix it with bolts. The operation is simple and convenient, and it is also convenient for subsequent disassembly and maintenance.

[0009] Furthermore, a plurality of LED lamp beads are clamped and fixed on the top of the circuit board, each of the LED lamp beads is clamped through the top of the silicone heat conducting plate, and the LED lamp beads are attached to the bottom of the light guide plate body;

[0010] The silicone thermal conductive plate can conduct heat to the circuit board and LED lamp beads, and the silicone thermal conductive fins can greatly increase the heat dissipation area, avoiding the circuit board and LED lamp beads from being overheated and resulting in a shortened service life.

[0011] Furthermore, a heat dissipation vent is formed through the bottom of one side of the support base, a plurality of support protection frames are welded through the top of the heat dissipation vent, and a plurality of the silicone thermal conductive fins are bonded and fixed in the plurality of support protection frames;

[0012] The heat dissipation vents allow heat exchange between the outside air and the thermally conductive silicone fins to quickly dissipate heat from the circuit board. The support and protection frame can protect the thermally conductive silicone fins to prevent deformation and damage to the thermally conductive silicone fins.

[0013] Furthermore, a fixing threaded hole is opened at one end of the top of the side support frame, the first reflector is attached to one side of the light guide plate body, and the LED lamp bead is located between the two first reflectors;

[0014] The light scattered to the side support frame can be reflected by the first reflecting plate, so that the light passes through the light guide plate body again, and the light guide plate body emits light uniformly, and multiple LED light sources are not needed, and energy consumption is reduced.

[0015] Further, a mounting hole is formed in one end of the positioning top cover, a bolt is inserted through the mounting hole, the bottom of the bolt is screwed into a fixed threaded hole, and the second reflecting plate is attached to the top of the light guide plate body.

[0016] The light scattered to the positioning top cover can be reflected by the second reflecting plate, so that the light passes through the light guide plate body again, and the light guide plate body emits light uniformly, the side support plate and the positioning top cover are connected by the bolt, the light guide plate body can be further positioned, the stability of the light guide plate structure between the support base, the side support frame and the positioning top cover during use is ensured, and when the light guide plate body needs to be disassembled and replaced, the positioning top cover can be quickly opened and the light guide plate body can be taken out by unscrewing the bolt, so that the operation is simple and convenient.

[0017] The utility model has the advantages of the following beneficial effects:

[0018] The utility model discloses a support base is set up, solved the light guide plate usually uses LED light source, and thus in use, a certain heat will be produced, but due to the light guide plate whole thin, make the volume of LED light source smaller, further make its heat dissipation area smaller, difficult to heat quickly, reduce the service life of LED light source's problem, through the silica gel heat conduction plate can quickly transfer the heat of circuit board produces, and through the silica gel heat conduction fin greatly improves the heat dissipation area of silica gel heat conduction plate, and then the circuit board cooling quickly, avoid the circuit board and LED lamp pearl temperature too high and lead to the reduction of service life.

[0019] The utility model solves the problem that a light guide plate structure usually sets light sources at multiple positions around it to ensure uniform brightness of the entire light guide plate by setting side support frames and positioning top covers. Multiple light sources will cause the light guide plate structure to heat up quickly and increase the power consumption of the light guide plate structure when in use. At the same time, the light guide plate is easily damaged when it is accidentally impacted due to its extremely thin thickness and large area, and the mounting structure of the light guide plate is usually difficult to quickly disassemble from the light guide plate body, making it inconvenient to repair. When the LED lamp beads are turned on, the first reflector and the second reflector are used to reflect the light scattered to the side support frames and the positioning top cover, so that the light passes through the light guide plate body again, further making the light guide plate body emit light evenly, without the need to set up multiple LED light sources, reducing energy consumption, and the side support plates and the positioning top cover are installed and connected by bolts, which can further position the light guide plate body and ensure the stability of the light guide plate structure between the support base, the side support frames and the positioning top cover when in use. When disassembly and replacement are required, the positioning top cover can be quickly opened and the light guide plate body can be taken out by unscrewing and removing the bolts, which is simple and convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural effect diagram of the utility model;

[0021] Figure 2 This is a structural diagram of the support base of the utility model;

[0022] Figure 3 This is a cross-sectional view of the support base of the utility model;

[0023] Figure 4 This is a structural diagram of the side support frame of the utility model;

[0024] Figure 5 This is a structural diagram of the positioning top cover of the utility model;

[0025] Figure 6 This is a bottom view of the positioning top cover of the utility model.

[0026] Reference numerals:

[0027] 1. Support base; 101. Silicone heat-conducting plate; 102. LED lamp beads; 103. Heat dissipation vent; 104. Support protection frame; 105. Silicone heat-conducting fins; 106. Circuit board; 2. Side support frame; 201. First reflector; 202. Fixing threaded holes; 3. Positioning top cover; 301. Mounting holes; 302. Bolts; 303. Second reflector; 4. Light guide plate body. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0029] See alsoFigures 1-6 As shown, the utility model is a light guide plate structure for a liquid crystal display screen, comprising a support base 1, a side support frame 2, a positioning top cover 3 and a light guide plate body 4, a circuit board 106 is clamped and fixed to the top of the support base 1, a silicone heat conducting plate 101 is bonded and fixed to the outer peripheral surface of the circuit board 106, a plurality of silicone heat conducting fins 105 are bonded and fixed to the bottom of the silicone heat conducting plate 101, the side support frames 2 are welded and fixed to the top ends of the support base 1, a first reflective plate 201 is clamped and fixed to the inner sides of the side support frame 2, a positioning top cover 3 is rotatably clamped to one end of the top of the side support frame 2, a second reflective plate 303 is clamped and fixed to the bottom of the positioning top cover 3, and the light guide plate body 4 is clamped between the support base 1, the side support frame 2 and the positioning top cover 3;

[0030] When installing the light guide plate structure, the light guide plate body 4 is inserted between the two side support frames 2 and the bottom of the light guide plate is fitted to the support base 1, and then the positioning top cover 3 is rotated to close and screwed and fixed by bolts 302. When the light guide plate structure is in use, the LED lamp beads 102 are turned on, and the light scattered to the side support frames 2 and the positioning top cover 3 is reflected by the first reflector 201 and the second reflector 303, so that the light passes through the light guide plate body 4 again, further making the light guide plate body 4 emit light evenly, and the silicone heat conducting plate 101 quickly transfers the heat generated by the circuit board 106, and greatly increases the heat dissipation area of ​​the silicone heat conducting plate 101 through the silicone heat conducting fins 105, so that the heat is quickly transferred to the environment, avoiding the circuit board 106 and the LED lamp beads 102 from being too hot.

[0031] Among them Figures 1-3 As shown, a plurality of LED lamp beads 102 are fixed to the top of the circuit board 106, and each LED lamp bead 102 is clamped through the top of the silicone heat conductive plate 101. The LED lamp bead 102 is attached to the bottom of the light guide plate body 4. A heat dissipation vent 103 is opened through the bottom of one side of the support base 1. A plurality of support protection frames 104 are welded through the top of the heat dissipation vent 103. A plurality of silicone heat conductive fins 105 are adhesively fixed to the plurality of support protection frames 104.

[0032] The LED lamp bead 102 is turned on through the circuit board 106. After a period of use, the heat generated by the LED lamp bead 102 is transferred to the silicone heat conductive plate 101, and further transferred to the multiple silicone heat conductive fins 105. Then, the support protection frame 104 is exposed to the outside air through the heat dissipation port 103, so that the heat is quickly transferred to the environment, avoiding the circuit board 106 and the LED lamp bead 102 from overheating.

[0033] Among them Figure 1 、 4As shown in , 5 and 6, a fixing threaded hole 202 is opened at one end of the top of the side support frame 2, the first reflector 201 is attached to one side of the light guide plate body 4, the LED lamp bead 102 is located between the two first reflectors 201, and a mounting hole 301 is opened at one end of the top of the positioning top cover 3. A bolt 302 is inserted through the mounting hole 301, and the bottom of the bolt 302 is screwed and fixed in the fixing threaded hole 202, and the second reflector 303 is attached to the top of the light guide plate body 4;

[0034] When the LED lamp bead 102 is turned on, the light scattered to the side support frame 2 and the positioning top cover 3 is reflected by the first reflector 201 and the second reflector 303, so that the light passes through the light guide plate body 4 again, further making the light guide plate body 4 emit light evenly, and there is no need to set up multiple LED light sources. When the light guide plate body 4 needs to be replaced, unscrew and remove the bolt 302 and rotate to open the positioning top cover 3, quickly pull out the light guide plate body 4 from between the side support frames 2 and replace it.

[0035] The specific working principle of the present utility model is as follows: when the light guide plate structure is installed, the light guide plate main body 4 is inserted between the two side support frames 2 and the bottom of the light guide plate is fitted to the support base 1, and then the positioning top cover 3 is rotated to close and fixed by screwing it with bolts 302, and the LED lamp beads 102 are turned on through the circuit board 106, and the light scattered to the side support frames 2 and the positioning top cover 3 is reflected by the first reflector 201 and the second reflector 303, so that the light passes through the light guide plate main body 4 again, further making the light guide plate main body 4 emit light evenly, and the heat generated by the LED lamp beads 102 is transferred to the silicone heat conduction plate 101, and further transferred to the multiple silicone heat conduction fins 105, and then the support protection frame 104 is in contact with the outside air through the heat dissipation port 103, so that the heat is quickly transferred to the environment. When the light guide plate main body 4 needs to be replaced, unscrew and remove the bolts 302 and rotate to open the positioning top cover 3, quickly pull out the light guide plate main body 4 from between the side support frames 2 and replace it.

[0036] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions described in the aforementioned embodiments, any equivalent replacement of some of the technical features therein, and any modification, equivalent replacement, and improvement made are within the scope of protection of the present invention.

Claims

1. A light guide plate structure for a liquid crystal display screen, comprising a support base (1), a side support frame (2), a positioning top cover (3) and a light guide plate body (4), characterized in that: A circuit board (106) is fixedly connected to the top of the support base (1), a silicone heat-conducting plate (101) is bonded and fixed to the outer peripheral surface of the circuit board (106), and a plurality of silicone heat-conducting fins (105) are bonded and fixed to the bottom of the silicone heat-conducting plate (101), a side support frame (2) is welded and fixed to both ends of the top of the support base (1), a first reflective plate (201) is fixedly connected to both sides of the inside of the side support frame (2), a positioning top cover (3) is rotatably connected to one end of the top of the side support frame (2), and a second reflective plate (303) is bonded and fixed to the bottom of the positioning top cover (3), and a light guide plate body (4) is bonded between the support base (1), the side support frame (2) and the positioning top cover (3).

2. The light guide plate structure for a liquid crystal display according to claim 1, wherein: A plurality of LED lamp beads (102) are clamped and fixed on the top of the circuit board (106), and each of the LED lamp beads (102) is clamped through the top of the silicone heat conducting plate (101), and the LED lamp beads (102) are attached to the bottom of the light guide plate body (4).

3. The light guide plate structure for a liquid crystal display according to claim 1, wherein: A heat dissipation opening (103) is provided through the bottom of one side of the support base (1), a plurality of support protection frames (104) are welded through the top of the heat dissipation opening (103), and a plurality of silicone heat-conducting fins (105) are bonded and fixed in the plurality of support protection frames (104).

4. The light guide plate structure for a liquid crystal display according to claim 2, wherein: A fixing threaded hole (202) is provided at one end of the top of the side support frame (2); the first reflector (201) is attached to one side of the light guide plate body (4); and the LED lamp bead (102) is located between the two first reflector plates (201).

5. The light guide plate structure for a liquid crystal display according to claim 4, wherein: A mounting hole (301) is provided at one end of the top of the positioning top cover (3), a bolt (302) is inserted through the mounting hole (301), the bottom of the bolt (302) is screwed and fixed in the fixing threaded hole (202), and the second reflector (303) is attached to the top of the light guide plate body (4).

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