Light and thin liquid crystal module and liquid crystal display screen

Abstract

The invention discloses a light and thin liquid crystal module and a liquid crystal display screen, and relates to the technical field of liquid crystal modules. The light and thin liquid crystal module comprises a liquid crystal display panel, a front shell assembly, a rear shell assembly and a heat dissipation unit; the front shell assembly is matched with the liquid crystal display panel; the rear shell assembly is arranged at the rear end of the front shell assembly; the two sides of the rear shell assembly are each provided with a plurality of sets of heat dissipation holes. A dustproof assembly is arranged at the position, corresponding to the heat dissipation holes, in the rear shell assembly. The dustproof unit is close to one side of the heat dissipation holes and is rotatably arranged in the rear shell assembly, the shielding unit is rotatably arranged in the rear shell assembly and is close to the dustproof unit, and the driving unit is used for driving the dustproof unit and the shielding unit to rotate; the dustproof assembly can be dynamically adjusted according to the temperature in the liquid crystal module, so that the optimal working effect of the liquid crystal module is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field related to liquid crystal modules, and in particular to a light and thin liquid crystal module and a liquid crystal display screen. Background Art

[0002] With the continuous development of science and technology, LCD modules, as a new type of display device, have gradually become an indispensable part of people's daily life. LCD modules are widely used in various electronic products, such as display screens, due to their advantages of high definition and low power consumption. LCD modules are an integral part of LCD panels, backlight sources, drive circuits, control circuits, etc.

[0003] The patent document with patent number CN116935756B discloses a lightweight liquid crystal module, including a fixed shell, a first inclined slot fixed shell inner wall is provided with a plurality of slide grooves, a display screen is movably arranged in the first inclined slot slide groove, a backlight assembly is fixedly connected to one side of the first inclined slot display screen, grooves and through holes are axially symmetrically arranged on both sides of the first inclined slot slide groove, the first inclined slot through hole is located above the first inclined slot groove, the first inclined slot through hole is axially connected to the first inclined slot groove, a shielding assembly is arranged in the first inclined slot through hole, and the display screen can be used normally by snapping the protrusion and the embedded groove, when the user applies a large force to the display screen, the display screen will move downward along the slide groove, and the inclined block will drive the pushing assembly to work during the downward movement of the slide groove, and when the display screen is about to reach the bottom of the slide groove, the pushing assembly can drive the shielding plate to form a protective barrier above the display screen, thereby playing a certain protective role for the display screen.

[0004] However, during actual use, the inventors found that as the power consumption of existing LCD modules increases, the heat dissipation requirements for the LCD modules are also getting higher and higher. In order to further improve the heat dissipation effect of the LCD module, more heat dissipation holes are usually opened on the LCD screen to further improve the heat dissipation effect of the LCD screen. However, as the number of heat dissipation holes increases, more dust will enter the interior of the LCD screen, thereby affecting the normal service life of the heat dissipation module. Summary of the invention

[0005] In order to solve the defects of the prior art, the present invention provides a light and thin liquid crystal module and a liquid crystal display screen.

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

[0007] The present invention provides a lightweight liquid crystal module, comprising:

[0008] A liquid crystal display panel and a front housing assembly arranged in cooperation with the liquid crystal display panel;

[0009] and a rear housing assembly disposed at the rear end of the front housing assembly;

[0010] A plurality of heat dissipation holes are respectively provided on both sides of the rear housing assembly;

[0011] A dustproof component is arranged inside the rear housing component at a position corresponding to the heat dissipation hole, and includes a dustproof unit rotatably arranged inside the rear housing component and close to one side of the heat dissipation hole, a shielding unit rotatably arranged inside the rear housing component and close to the dustproof unit, and a driving unit for driving the dustproof unit and the shielding unit to rotate;

[0012] A plurality of heat dissipation units are also arranged at the bottom of the rear housing assembly.

[0013] As a preferred technical solution of the present invention, a temperature sensor and a control module are further provided inside the front housing assembly, and the control module is electrically connected to the temperature sensor, the driving unit and the heat dissipation unit.

[0014] As a preferred technical solution of the present invention, when the liquid crystal module works normally, the control module controls the driving unit to work and then controls the shielding unit to open, and controls the heat dissipation unit to work, and at the same time the dustproof unit shields the heat dissipation hole;

[0015] When the temperature sensor detects that the internal temperature of the front housing assembly exceeds a threshold, the control module controls the dustproof unit to open;

[0016] When the liquid crystal module is not working and the internal temperature of the front housing assembly is lower than a threshold value, the control module controls the heat dissipation unit and the driving unit to stop working, and the dustproof unit and the shielding unit are closed.

[0017] As a preferred technical solution of the present invention, the dustproof unit includes a first rotating shaft rotatably arranged inside the rear housing assembly, a dustproof frame fixedly arranged on the first rotating shaft, and a dustproof net arranged inside the dustproof frame.

[0018] As a preferred technical solution of the present invention, the shielding unit includes a second rotating shaft rotatably arranged inside the rear housing assembly, a main shielding plate fixedly connected to the second rotating shaft, a side shielding plate arranged on one side of the main shielding plate, and auxiliary shielding plates arranged on the upper and lower sides of the main shielding plate;

[0019] The main shielding plate, the side shielding plate and the upper and lower groups of auxiliary shielding plates shield the dustproof net.

[0020] As a preferred technical solution of the present invention, the driving unit includes:

[0021] A driving member, fixedly disposed inside the rear housing assembly;

[0022] A driving bevel gear, drivingly connected to the driving member;

[0023] A first driven bevel gear, drivingly connected to the driving bevel gear and coaxially arranged with the first incomplete gear;

[0024] A first gear, which is arranged in transmission with the first incomplete gear and is in transmission connection with the first rotating shaft or the second rotating shaft through a transmission belt;

[0025] A second driven bevel gear is transmission-connected to the driving bevel gear and is coaxially arranged with the second incomplete gear, and the second incomplete gear is rotatably arranged inside the rear housing assembly;

[0026] The second gear is arranged in transmission with the second incomplete gear and is connected to the second rotating shaft or the first rotating shaft through a transmission belt.

[0027] As a preferred technical solution of the present invention, the dustproof units or shielding units located on both sides of the rear housing assembly are connected via a transmission unit, and the transmission unit includes:

[0028] A first bevel gear pair is drivingly connected to the first rotating shaft or the second rotating shaft on one side of the rear housing assembly close to the driving unit, and the first bevel gear pair is arranged at an upper end of the interior of the rear housing assembly;

[0029] A transmission rod, rotatably disposed inside the rear housing assembly and transmission-connected to the first bevel gear pair;

[0030] The second bevel gear pair is transmission-connected to the first rotating shaft or the second rotating shaft on a side of the rear housing assembly away from the driving unit, and is transmission-connected to the transmission rod.

[0031] As a preferred technical solution of the present invention, a guide plate is fixedly provided inside the rear housing assembly at a position corresponding to the heat dissipation unit, and the cross-sectional width of the guide plate increases sequentially from bottom to top.

[0032] As a preferred technical solution of the present invention, the heat dissipation holes are also provided on both sides of the front housing assembly, and a dustproof net is fixedly provided inside the front housing assembly at positions corresponding to the heat dissipation holes.

[0033] The present invention further provides a liquid crystal display screen, comprising a thin and light liquid crystal module and a mounting bracket, wherein the mounting bracket is connected to the rear housing assembly.

[0034] The beneficial effects of the present invention are:

[0035] 1. In the present invention, an adjustable dustproof component is arranged inside the rear housing component. When the liquid crystal module works normally, the dustproof unit in the dustproof component can block the heat dissipation holes, thereby preventing dust from entering the interior of the liquid crystal module along the heat dissipation holes. When the temperature inside the liquid crystal module rises, the dustproof unit and the blocking unit in the dustproof component are opened together to increase the flow speed of the air inside the liquid crystal module and the outside air, thereby improving the heat dissipation effect inside the liquid crystal module. In this way, the dustproof component can be dynamically adjusted according to the temperature inside the liquid crystal module to achieve the best working effect of the liquid crystal module.

[0036] 2. In the present invention, the liquid crystal module includes a front shell component and a rear shell component. The rear shell component is provided on the one hand to facilitate the provision of a dustproof component. On the other hand, the rear shell component can increase the internal space size of the liquid crystal module, making it more convenient for air to circulate rapidly inside the liquid crystal module. At the same time, the heat dissipation unit provided inside the rear shell component cooperates with the guide plate to quickly blow air to the front shell component, so as to facilitate rapid heat exchange of air with components such as circuit boards inside the front shell component, thereby effectively improving the heat dissipation effect of the liquid crystal module. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0038] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0039] Figure 2 Another structural schematic diagram of the present invention.

[0040] Figure 3 It is a schematic diagram of the structure of the front housing assembly.

[0041] Figure 4 It is a schematic diagram of the structure when both the dustproof unit and the shielding unit are closed.

[0042] Figure 5 for Figure 4 A local enlarged schematic diagram of point A in the middle.

[0043] Figure 6 This is a schematic diagram of the structure when the occlusion unit is opened.

[0044] Figure 7 for Figure 6 A local enlarged schematic diagram of point B in the middle.

[0045] Figure 8 Schematic diagram of the structure of the dustproof unit.

[0046] Fig. 9Schematic diagram of the structure of the occlusion unit.

[0047] Fig.10 A schematic diagram of the structure of the drive unit.

[0048] Fig.11 Another structural schematic diagram of the drive unit.

[0049] Fig.12 It is a structural diagram of the transmission unit.

[0050] In the figure: 1. LCD panel; 2. front shell assembly; 3. rear shell assembly; 31. heat dissipation hole; 4. dustproof assembly; 41. dustproof unit; 411. first rotating shaft; 412. dustproof frame; 413. dustproof net; 42. shielding unit; 421. second rotating shaft; 422. main shielding plate; 423. side shielding plate; 424. auxiliary shielding plate; 43. driving unit; 431. driving member; 432. driving bevel gear; 433. first driven bevel gear; 434. first incomplete gear; 435. first gear; 436. transmission belt; 437. second driven bevel gear; 438. second incomplete gear; 439. second gear; 5. heat dissipation unit; 6. temperature sensor; 7. control module; 8. transmission unit; 81. first bevel gear pair; 82. transmission rod; 83. second bevel gear pair; 9. guide plate. DETAILED DESCRIPTION

[0051] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0052] Embodiment 1

[0053] like Figure 1-Figure 11 As shown, a thin and light liquid crystal module includes a liquid crystal display panel 1, a front shell component 2, a rear shell component 3 and a heat dissipation unit 5; the front shell component 2 is arranged in cooperation with the liquid crystal display panel 1; the rear shell component 3 is arranged at the rear end of the front shell component 2; a plurality of heat dissipation holes 31 are respectively opened on both sides of the rear shell component 3; a dustproof component 4 is arranged at a position corresponding to the heat dissipation holes 31 inside the rear shell component 3, which includes a dustproof unit 41 which is close to one side of the heat dissipation holes 31 and is rotatably arranged inside the rear shell component 3, a shielding unit 42 which is rotatably arranged inside the rear shell component 3 and is close to the dustproof unit 41, and a driving unit 43 for driving the dustproof unit 41 and the shielding unit 42 to rotate.

[0054] Among them, by setting an adjustable dustproof component 4 inside the rear shell component 3, when the liquid crystal module is working normally, the dustproof unit 41 in the dustproof component 4 can block the heat dissipation holes 31, thereby preventing dust from entering the interior of the liquid crystal module along the heat dissipation holes 31; when the temperature inside the liquid crystal module rises, the dustproof unit 41 and the blocking unit 42 in the dustproof component 4 are opened together to increase the flow speed of the air inside the liquid crystal module and the outside air, thereby improving the heat dissipation effect inside the liquid crystal module; this arrangement can dynamically adjust the dustproof component 4 according to the temperature inside the liquid crystal module to achieve the best working effect of the liquid crystal module.

[0055] During assembly, first install the LCD display panel 1 in the front housing assembly 2 to ensure docking with the device mainboard interface, and then join the front housing with the rear housing assembly 3 to ensure a stable structure. In addition to the LCD display panel 1, the interior of the LCD module also includes a backlight source, a circuit board and other structures, which will not be described one by one.

[0056] It should be noted that a driving power source is also provided inside the rear housing assembly 3 near the driving member 431, and the driving member 431 is electrically connected to the driving unit 43. By providing an independent power source, the dustproof assembly 4 can continuously work and respond to changes in system temperature.

[0057] The number and distribution of the heat dissipation holes 31 of the rear shell component 3 should be designed according to the heat dissipation requirements of the module and the external ambient temperature to ensure that heat can be effectively dissipated. It should be noted that the dustproof unit 41 and the shielding unit 42 in the dustproof component 4 can shield the above-mentioned heat dissipation holes 31.

[0058] Further, if Figure 3 As shown, a temperature sensor 6 and a control module 7 are also provided inside the front housing assembly 2, and the control module 7 is electrically connected to the temperature sensor 6, the drive unit 43 and the heat dissipation unit 5;

[0059] Here are some common working modes of dustproof components:

[0060] When the LCD module is working normally (such as Figure 7 As shown), the control module 7 controls the driving unit 43 to work and then controls the shielding unit 42 to open, and controls the heat dissipation unit 5 to work, and at the same time the dustproof unit 41 shields the heat dissipation hole 31 to prevent dust from entering;

[0061] When the temperature sensor 6 detects that the internal temperature of the front housing assembly 2 exceeds a threshold value (such as Fig.12 As shown), the control module 7 controls the dustproof unit 41 to open, keeping the heat dissipation holes 31 unobstructed to increase the heat dissipation effect;

[0062] When the liquid crystal module is not working and the internal temperature of the front housing assembly 2 is lower than the threshold value (such as Figure 5 As shown), the control module 7 controls the heat dissipation unit 5 and the driving unit 43 to stop working, and the dustproof unit 41 and the shielding unit 42 are closed to avoid unnecessary energy consumption and mechanical wear, and this can further improve the overall dustproof effect of the display screen. When the display screen is not in use, it can ensure that dust cannot enter the interior of the display screen from the heat dissipation holes 31.

[0063] Among them, after adding the temperature sensor 6 and the control module 7, the intelligence level of the liquid crystal module is significantly improved, and it can better adapt to environmental changes, extend the service life of the equipment and prevent overheating damage.

[0064] For example, when working, the normal operating temperature range inside the liquid crystal module is 0℃-60℃. When the internal temperature of the front shell component 2 is higher than 50℃ (that is, the high temperature alarm threshold is set to 50℃), the control module 7 should start the heat dissipation unit 5 and open the dustproof unit 41 to ensure the smooth flow of the heat dissipation holes 31 to prevent overheating. When the liquid crystal module is not working and the internal temperature of the front shell component 2 is lower than 30℃ (the working stop threshold is 30℃), the control module 7 should stop the heat dissipation unit 5 and the driving unit 43, and close the dustproof unit 41 and the shielding unit 42.

[0065] It should be noted that the temperature sensor 6 should be a high-sensitivity sensor that can adapt to changes in ambient temperature. The electrical connection between it and the control module 7 should be as short as possible to reduce signal loss. The control module 7 should be able to set the temperature threshold in a programmable manner and use PWM (pulse width modulation) to control the opening and closing of the drive unit 43. The specific working process will not be repeated here. The connecting cables between the various electrical components must be reasonably wired to avoid interference and short circuits. Shielded cables can be used when necessary.

[0066] Further, if Figure 8 As shown, the dustproof unit 41 includes a first rotating shaft 411 rotatably disposed inside the rear housing assembly 3 , a dustproof frame 412 fixedly disposed on the first rotating shaft 411 , and a dustproof net 413 disposed inside the dustproof frame 412 .

[0067] The structure of the dustproof frame 412 needs to select suitable materials, usually plastic or metal materials. The material of the dustproof net 413 should be stainless steel or other corrosion-resistant materials. The mesh number of the dustproof net 413 should be appropriate, not only to effectively intercept dust, but also to ensure air circulation and facilitate heat dissipation.

[0068] Further, if Fig. 9As shown, the shielding unit 42 includes a second rotating shaft 421 rotatably arranged inside the rear housing assembly 3, a main shielding plate 422 fixedly connected to the second rotating shaft 421, a side shielding plate 423 arranged on one side of the main shielding plate 422, and auxiliary shielding plates 424 arranged on both sides of the upper and lower sides of the main shielding plate 422;

[0069] The main shielding plate 422 , the side shielding plate 423 , and the upper and lower groups of auxiliary shielding plates 424 are used to shield the dustproof net 413 .

[0070] The main shielding plate 422, the side shielding plate 423 and the auxiliary shielding plate 424 can be connected by welding or screwing to ensure the connection strength and stability. Through the design of multiple sets of shielding plates, the shielding ability of the dustproof net 413 is effectively improved. When heat dissipation is not required, the shielding unit 42 can effectively block and shield the dustproof net 413 to ensure that dust cannot enter the interior of the display screen from the heat dissipation holes 31.

[0071] Further, if Figure 10-11 As shown, the driving unit 43 includes a driving member 431, a driving bevel gear 432, a first driven bevel gear 433, a first incomplete gear 434, a first gear 435, a transmission belt 436, a second driven bevel gear 437, a second incomplete gear 438 and a second gear 439. The driving member 431 is fixedly arranged inside the rear housing assembly 3; the driving bevel gear 432 is transmission-connected to the driving member 431; the first driven bevel gear 433 is transmission-connected to the driving bevel gear 432 and is coaxially arranged with the first incomplete gear 434 ; The first gear 435 is transmission-set with the first incomplete gear 434 and is transmission-connected with the first rotating shaft 411 or the second rotating shaft 421 through a transmission belt 436; the second driven bevel gear 437 is transmission-connected with the driving bevel gear 432 and is coaxially arranged with the second incomplete gear 438, and the second incomplete gear 438 is rotatably arranged inside the rear housing assembly 3; the second gear 439 is transmission-set with the second incomplete gear 438 and is transmission-connected with the second rotating shaft 421 or the first rotating shaft 411 through a transmission belt 436.

[0072] By setting the driving unit 43, the opening or closing of the dustproof unit 41 and the shielding unit 42 can be controlled simultaneously through a group of driving parts 431, which is convenient for use.

[0073] An optional implementation is provided, in which the first gear 435 is transmission-connected with the second rotating shaft 421, and the second gear 439 is transmission-connected with the first rotating shaft 411. When the shielding unit 42 needs to be switched from a closed state to an open state, the driving member 431 is controlled to work. After the driving member 431 works, the first driven bevel gear 433 and the second driven bevel gear 437 are synchronously driven to rotate through the active bevel gear 432. The first driven bevel gear 433 drives the first incomplete gear 434 to rotate and then drives the first gear 435 to rotate. The first gear 435 drives the second rotating shaft 421 to rotate through the transmission belt 436, and then first drives the shielding unit 42 to rotate, until the shielding unit 42 is opened but the dustproof unit 41 is still closed. If the dustproof unit 41 also needs to be opened, the control driving member 431 continues to work, and then the first incomplete gear 434 no longer cooperates with the first gear 435, and the second incomplete gear 438 starts to cooperate with the second gear 439 and then drives the first rotating shaft 411 to rotate through the transmission belt 436, thereby driving the dustproof unit 41 to open;

[0074] When the shielding unit 42 and the dustproof unit 41 need to be closed, the driving member 431 can be controlled to work in the reverse direction. First, the dustproof unit 41 will be closed, and then the shielding unit 42 will be closed.

[0075] Further, if Fig.12 As shown, the dustproof unit 41 or the shielding unit 42 located on both sides of the rear housing assembly 3 are connected through a transmission unit 8, and the transmission unit 8 includes a first bevel gear pair 81, a transmission rod 82 and a second bevel gear pair 83. The first bevel gear pair 81 is transmission-connected to the first rotating shaft 411 or the second rotating shaft 421 on the side of the rear housing assembly 3 close to the driving unit 43, and the first bevel gear pair 81 is arranged at the upper end of the interior of the rear housing assembly 3; the transmission rod 82 is rotatably arranged in the interior of the rear housing assembly 3 and is transmission-connected to the first bevel gear pair 81; the second bevel gear pair 83 is transmission-connected to the first rotating shaft 411 or the second rotating shaft 421 on the side of the rear housing assembly 3 away from the driving unit 43, and is transmission-connected to the transmission rod 82.

[0076] If only the driving unit 43 is provided, it is only possible to control the rotation of the dustproof unit 41 and the shielding unit 42 on one side of the rear shell assembly 3. If the rotation of the dustproof unit 41 and the shielding unit 42 on the other side needs to be controlled, a transmission unit 8 needs to be provided.

[0077] In detail, when the driving member 431 works and thus drives the first rotating shaft 411 or the second rotating shaft 421 close to the side of the driving member 431 to rotate, the first rotating shaft 411 or the second rotating shaft 421 on this side will drive the transmission rod 82 to rotate through the first bevel gear pair 81, and the transmission rod 82 will drive the second bevel gear pair 83 to work and thus drive the first rotating shaft 411 or the second rotating shaft 421 away from the side of the driving member 431 to rotate, thereby finally realizing the synchronous rotation of the dustproof unit 41 and the shielding unit 42 on both sides of the rear shell assembly 3.

[0078] It should be noted that the dustproof units 41 or shielding units 42 located on both sides of the rear housing assembly 3 rotate in opposite directions;

[0079] The first bevel gear pair 81 and the second bevel gear pair 83 are both composed of two bevel gears that cooperate with each other.

[0080] Further, if Figure 4-Figure 6 As shown, a plurality of heat dissipation units 5 are further provided at the bottom of the rear housing assembly 3, and a guide plate 9 is fixedly provided inside the rear housing assembly 3 at a position corresponding to the heat dissipation unit 5, and the cross-sectional width of the guide plate 9 increases sequentially from bottom to top, that is, the guide plate 9 has an arc-shaped structure, which can quickly guide the air from bottom to top to the interior of the front housing assembly 2 and enter from the upper end of the front housing assembly 2. After the air enters the upper end of the front housing assembly 2, it will quickly diffuse inside the front housing assembly 2 and achieve efficient heat exchange effect.

[0081] Among them, by setting the liquid crystal module including the front shell component 2 and the rear shell component 3, the setting of the rear shell component 3 is to facilitate the setting of the dustproof component 4 on the one hand, and on the other hand, the rear shell component 3 can increase the space size inside the liquid crystal module, which is more convenient for the rapid circulation of air inside the liquid crystal module. At the same time, the heat dissipation unit 5 set inside the rear shell component 3 cooperates with the guide plate 9 to quickly blow air to the front shell component 2, so as to facilitate the rapid heat exchange of air with components such as the circuit board inside the front shell component 2. The design of the guide plate 9 can effectively improve the internal airflow path, enhance the heat dissipation effect, and improve the overall heat dissipation efficiency, thereby effectively improving the heat dissipation effect of the liquid crystal module.

[0082] It should be noted that the heat dissipation unit 5 may be a heat dissipation fan.

[0083] Further, if Figure 1-Figure 3 As shown, the heat dissipation holes 31 are also opened on both sides of the front shell component 2 to further improve the heat dissipation effect of the front shell component 2, and a dustproof net 413 is fixedly arranged inside the front shell component 2 at the position corresponding to the heat dissipation holes 31. This arrangement can ensure that the front shell component 2 has a certain heat dissipation effect while also having a good dustproof effect.

[0084] The present invention further provides a liquid crystal display screen. The above-mentioned thin and light liquid crystal module further includes a mounting bracket, which is connected to the rear housing assembly 3. The mounting bracket can be a support base fixed on a desktop or a bracket fixed on a wall.

[0085] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A thin and light liquid crystal module, characterized in that: include: A liquid crystal display panel (1), and a front housing component (2) arranged in cooperation with the liquid crystal display panel (1); and a rear housing component (3) arranged at the rear end of the front housing component (2); A plurality of groups of heat dissipation holes (31) are respectively provided on both sides of the rear housing component (3); A dustproof component (4) is arranged inside the rear housing component (3) at a position corresponding to the heat dissipation hole (31), comprising a dustproof unit (41) rotatably arranged inside the rear housing component (3) and close to one side of the heat dissipation hole (31), a shielding unit (42) rotatably arranged inside the rear housing component (3) and close to the dustproof unit (41), and a driving unit (43) for driving the dustproof unit (41) and the shielding unit (42) to rotate; A plurality of heat dissipation units (5) are also provided at the bottom of the rear housing assembly (3).

2. The thin and light liquid crystal module according to claim 1, characterized in that: A temperature sensor (6) and a control module (7) are also provided inside the front housing assembly (2); the control module (7) is electrically connected to the temperature sensor (6), the drive unit (43) and the heat dissipation unit (5).

3. The thin and light liquid crystal module according to claim 2, characterized in that: When the liquid crystal module works normally, the control module (7) controls the driving unit (43) to work and then controls the shielding unit (42) to open, and controls the heat dissipation unit (5) to work, and at the same time the dustproof unit (41) shields the heat dissipation hole (31); When the temperature sensor (6) detects that the internal temperature of the front housing assembly (2) exceeds a threshold value, the control module (7) controls the dustproof unit (41) to open; When the liquid crystal module is not working and the internal temperature of the front housing assembly (2) is lower than a threshold value, the control module (7) controls the heat dissipation unit (5) and the drive unit (43) to stop working, and the dustproof unit (41) and the shielding unit (42) are both closed.

4. The thin and light liquid crystal module according to claim 1, characterized in that: The dustproof unit (41) comprises a first rotating shaft (411) rotatably arranged inside the rear housing assembly (3), a dustproof frame (412) fixedly arranged on the first rotating shaft (411), and a dustproof net (413) arranged inside the dustproof frame (412).

5. The thin and light liquid crystal module according to claim 4, characterized in that: The shielding unit (42) comprises a second rotating shaft (421) rotatably arranged inside the rear housing assembly (3), a main shielding plate (422) fixedly connected to the second rotating shaft (421), a side shielding plate (423) arranged on one side of the main shielding plate (422), and auxiliary shielding plates (424) arranged on both upper and lower sides of the main shielding plate (422); The main shielding plate (422), the side shielding plate (423) and the upper and lower groups of auxiliary shielding plates (424) achieve shielding of the dustproof net (413).

6. The thin and light liquid crystal module according to claim 5, characterized in that: The driving unit (43) comprises: A driving member (431) fixedly disposed inside the rear housing assembly (3); A driving bevel gear (432) is drivingly connected to the driving member (431); A first driven bevel gear (433) is transmission-connected to the driving bevel gear (432) and is coaxially arranged with the first incomplete gear (434); A first gear (435) is arranged in transmission with the first incomplete gear (434) and is in transmission connection with the first rotating shaft (411) or the second rotating shaft (421) via a transmission belt (436); A second driven bevel gear (437) is transmission-connected to the driving bevel gear (432) and is coaxially arranged with a second incomplete gear (438), wherein the second incomplete gear (438) is rotatably arranged inside the rear housing assembly (3); The second gear (439) is arranged in transmission connection with the second incomplete gear (438) and is in transmission connection with the second rotating shaft (421) or the first rotating shaft (411) through a transmission belt (436).

7. The thin and light liquid crystal module according to claim 6, characterized in that: The dustproof units (41) or shielding units (42) located on both sides of the rear housing assembly (3) are connected via a transmission unit (8), and the transmission unit (8) comprises: A first bevel gear pair (81) is drivingly connected to the first rotating shaft (411) or the second rotating shaft (421) located inside the rear housing assembly (3) and close to the driving unit (43), and the first bevel gear pair (81) is arranged at an upper end inside the rear housing assembly (3); A transmission rod (82) is rotatably disposed inside the rear housing assembly (3) and is transmission-connected to the first bevel gear pair (81); The second bevel gear pair (83) is transmission-connected to the first rotating shaft (411) or the second rotating shaft (421) on the side of the rear housing assembly (3) away from the driving unit (43), and is transmission-connected to the transmission rod (82).

8. The thin and light liquid crystal module according to claim 1, characterized in that: A guide plate (9) is fixedly arranged inside the rear housing assembly (3) at a position corresponding to the heat dissipation unit (5), and the cross-sectional width of the guide plate (9) increases sequentially from bottom to top.

9. The thin and light liquid crystal module according to claim 1, characterized in that: The heat dissipation holes (31) are also provided on both sides of the front housing component (2), and a dustproof net (413) is fixedly provided inside the front housing component (2) at a position corresponding to the heat dissipation holes (31).

10. A liquid crystal display screen, comprising the thin and light liquid crystal module according to any one of claims 1 to 9, characterized in that: It also includes a mounting bracket, which is connected to the rear housing assembly (3).

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