A light and thin liquid crystal module and liquid crystal display screen

Abstract

The application discloses a light and thin liquid crystal module and a liquid crystal display screen, and relates to the technical field of liquid crystal modules, which comprises a liquid crystal display panel, a front shell assembly, a rear shell assembly and a heat dissipation unit; the front shell assembly is arranged in cooperation with the liquid crystal display panel; the rear shell assembly is arranged at the rear end of the front shell assembly; a plurality of groups of heat dissipation holes are formed in the two sides of the rear shell assembly; a dustproof assembly is arranged at the position corresponding to the heat dissipation holes in the interior of the rear shell assembly, which comprises a dustproof unit arranged in rotation in the interior of the rear shell assembly and close to one side of the heat dissipation hole, a shielding unit arranged in rotation in the interior of the rear shell assembly and close to the dustproof unit, and a driving unit for driving the rotation of the dustproof unit and the shielding unit; the dustproof assembly can be dynamically adjusted according to the temperature in the interior of the liquid crystal module, so that the optimal working effect of the liquid crystal module is realized.

Description

Technical Field

[0001] This invention relates to the technical field of liquid crystal modules, specifically to a thin and light liquid crystal module and a liquid crystal display screen. Background Technology

[0002] With the continuous development of technology, LCD modules, as a new type of display device, have gradually become an indispensable part of people's daily lives. LCD modules are widely used in various electronic products, such as displays, due to their advantages such as high definition and low power consumption. An LCD module is a whole composed of an LCD panel, backlight, driving circuit, control circuit, etc.

[0003] Patent document CN116935756B discloses a thin and light liquid crystal module, including a fixed shell. The inner wall of the fixed shell has multiple grooves. A display screen is movably disposed in the first inclined groove. A backlight assembly is fixedly connected to one side of the first inclined groove display screen. Grooves and through holes are symmetrically formed on both sides of the first inclined groove. The first inclined groove through hole is located above the first inclined groove groove and is axially connected to the first inclined groove groove. A shielding assembly is disposed in the first inclined groove through hole. The engagement between the protrusion and the groove ensures the use of the display screen under normal conditions. When the user applies a large force to the display screen, the display screen will move downward along the groove. During the downward movement of the groove, the inclined block will drive the pushing assembly to work. When the display screen is about to reach the bottom of the groove, the pushing assembly can drive the shielding plate to form a protective barrier above the display screen, thereby providing a certain degree of protection for the display screen.

[0004] However, in actual use, the inventors found that as the power consumption of existing LCD modules increases, the heat dissipation requirements of LCD modules are also getting higher and higher. In order to further improve the heat dissipation effect of LCD modules, more heat dissipation holes are usually opened on the LCD screen to further improve the heat dissipation effect of the LCD screen. However, with the increase of heat dissipation holes, more dust will enter the LCD screen, which will affect the normal service life of the heat dissipation module. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a thinner and lighter liquid crystal module and liquid crystal display screen.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] This invention provides a thinner and lighter liquid crystal module, comprising:

[0008] A liquid crystal display panel and a front housing assembly that mates with the liquid crystal display panel;

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

[0010] Several sets of heat dissipation holes are respectively opened on both sides of the rear housing assembly;

[0011] The rear housing assembly has a dustproof assembly located inside the heat dissipation hole. The dustproof assembly includes a dustproof unit that is rotatably disposed inside the rear housing assembly near the heat dissipation hole, a shielding unit that is rotatably disposed inside the rear housing assembly near the dustproof unit, and a drive unit for driving the dustproof unit and the shielding unit to rotate.

[0012] The bottom of the rear housing assembly is also provided with several sets of heat dissipation units.

[0013] As a preferred embodiment of the present invention, the front housing assembly is further provided with a temperature sensor and a control module, and the control module is electrically connected to the temperature sensor, the drive unit and the heat dissipation unit.

[0014] As a preferred technical solution of the present invention, when the liquid crystal module is working normally, the control module will control the driving unit to work, thereby controlling the shielding unit to open, and controlling the heat dissipation unit to work, while the dustproof unit will shield 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 LCD module is not working and the internal temperature of the front housing assembly is below a threshold, the control module controls the heat dissipation unit and the drive unit to stop working, and the dustproof unit and the shielding unit are both turned off.

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

[0018] As a preferred technical solution of the present invention, the shielding unit includes a second rotating shaft rotatably disposed inside the rear housing assembly, a main shielding plate fixedly connected to the second rotating shaft, a side shielding plate disposed on one side of the main shielding plate, and auxiliary shielding plates disposed 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 sets of the auxiliary shielding plates cover the dustproof net.

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

[0021] The drive unit is fixedly disposed inside the rear housing assembly;

[0022] The driving bevel gear is connected to the driving component for transmission.

[0023] The first driven bevel gear is connected to the driving bevel gear and is coaxially arranged with the first incomplete gear;

[0024] The first gear is configured to drive the first incomplete gear and is connected to the first or second shaft via a drive belt;

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

[0026] The second gear is configured to drive the second incomplete gear and is connected to the second shaft or the first shaft via a drive belt.

[0027] As a preferred embodiment of the present invention, the dustproof units or shielding units located on both sides inside the rear housing assembly are connected by a transmission unit, the transmission unit comprising:

[0028] The first bevel gear pair is connected to the first or second rotating shaft inside the rear housing assembly near the drive unit, and the first bevel gear pair is located at the upper end of the interior of the rear housing assembly.

[0029] The transmission rod is rotatably disposed inside the rear housing assembly and is connected to the first bevel gear pair for transmission.

[0030] The second bevel gear pair is driven to the first or second rotating shaft inside the rear housing assembly on the side away from the drive unit, and is also driven to the transmission rod.

[0031] As a preferred embodiment 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 embodiment of the present invention, the heat dissipation holes are also provided on both sides of the front housing assembly, and a dustproof mesh is fixedly provided inside the front housing assembly at the position corresponding to the heat dissipation holes.

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

[0034] The beneficial effects of this invention are:

[0035] 1. In this invention, an adjustable dustproof component is installed inside the rear housing assembly. When the LCD module is working normally, the dustproof unit in the dustproof component can block the heat dissipation holes, thereby preventing dust from entering the interior of the LCD module along the heat dissipation holes. When the temperature inside the LCD module rises, the dustproof unit and the blocking unit in the dustproof component open together to increase the airflow speed between the inside of the LCD module and the outside air, thereby improving the heat dissipation effect inside the LCD module. This setting can dynamically adjust the dustproof component according to the temperature inside the LCD module to achieve the best working effect of the LCD module.

[0036] 2. In this invention, the liquid crystal module includes a front housing assembly and a rear housing assembly. The rear housing assembly is provided to facilitate the installation of dustproof components. On the other hand, the rear housing assembly can increase the internal space of the liquid crystal module, making it easier for air to circulate quickly inside the liquid crystal module. At the same time, the heat dissipation unit set inside the rear housing assembly, together with the guide plate, can quickly blow air to the front housing assembly, so as to facilitate the rapid heat exchange of the air with the circuit boards and other components inside the front housing assembly, thereby effectively improving the heat dissipation effect of the liquid crystal module. Attached Figure Description

[0037] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

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

[0039] Figure 2 This is another structural schematic diagram of the present invention.

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

[0041] Figure 4 This 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 magnified view of a portion of point A in the middle.

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

[0044] Figure 7 for Figure 6 A magnified view of a portion of point B in the middle.

[0045] Figure 8 This is a schematic diagram of the dustproof unit.

[0046] Figure 9This is a schematic diagram of the shading unit.

[0047] Figure 10 This is a schematic diagram of the drive unit.

[0048] Figure 11 This is a schematic diagram of another structure for the drive unit.

[0049] Figure 12 This is a schematic diagram of the transmission unit.

[0050] In the diagram: 1. LCD display panel; 2. Front housing assembly; 3. Rear housing assembly; 31. Heat dissipation vent; 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. Secondary shielding plate; 43. Drive unit; 431. Drive component; 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 Implementation

[0051] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0052] Example 1

[0053] like Figures 1-11 As shown, a thin and light liquid crystal module includes a liquid crystal display panel 1, a front housing assembly 2, a rear housing assembly 3, and a heat dissipation unit 5. The front housing assembly 2 is configured to cooperate with the liquid crystal display panel 1. The rear housing assembly 3 is disposed at the rear end of the front housing assembly 2. Several sets of heat dissipation holes 31 are respectively opened on both sides of the rear housing assembly 3. A dustproof assembly 4 is disposed inside the rear housing assembly 3 at the position corresponding to the heat dissipation holes 31. The dustproof assembly 4 includes a dustproof unit 41 that is rotatably disposed inside the rear housing assembly 3 near the heat dissipation holes 31, a shielding unit 42 that is rotatably disposed inside the rear housing assembly 3 near the dustproof unit 41, and a driving unit 43 for driving the dustproof unit 41 and the shielding unit 42 to rotate.

[0054] The rear housing assembly 3 is equipped with an adjustable dustproof component 4. When the LCD module is working normally, the dustproof unit 41 in the dustproof component 4 can block the heat dissipation hole 31, thereby preventing dust from entering the interior of the LCD module along the heat dissipation hole 31. When the temperature inside the LCD module rises, the dustproof unit 41 and the blocking unit 42 in the dustproof component 4 open together to increase the airflow speed between the inside of the LCD module and the outside air, thereby improving the heat dissipation effect inside the LCD module. This setting can dynamically adjust the dustproof component 4 according to the temperature inside the LCD module to achieve the best working effect of the LCD module.

[0055] During assembly, the LCD display panel 1 is first installed in the front housing assembly 2 to ensure docking with the device motherboard interface. Then, the front housing is joined with the rear housing assembly 3 to ensure structural stability. The internal structure of the LCD module includes not only the LCD display panel 1, but also backlight, circuit board, etc., which will not be described in detail here.

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

[0057] The number and distribution of heat dissipation holes 31 in the rear housing assembly 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 assembly 4 can shield the aforementioned heat dissipation holes 31.

[0058] Furthermore, such as Figure 3 As shown, 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.

[0059] The following are some commonly used operating modes of dustproof components:

[0060] When the LCD module is working normally (e.g.) Figure 7 As shown), the control module 7 controls the drive unit 43 to work, thereby controlling the shielding unit 42 to open, and controls the heat dissipation unit 5 to work. At the same time, the dustproof unit 41 will shield 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 (e.g.) Figure 12 As shown), the control module 7 controls the dustproof unit 41 to open, keeping the heat dissipation hole 31 unobstructed to increase the heat dissipation effect;

[0062] When the LCD module is not working and the internal temperature of the front housing assembly 2 is below a threshold (e.g.) Figure 5 As shown, 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 turned off to avoid unnecessary energy consumption and mechanical wear. 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 hole 31.

[0063] With the addition of temperature sensor 6 and control module 7, the intelligence level of the LCD module is significantly improved, enabling it to better adapt to environmental changes, extend the service life of the equipment, and prevent overheating damage.

[0064] For example, during operation, the normal operating temperature range inside the LCD module is 0℃-60℃. When the internal temperature of the front housing assembly 2 is higher than 50℃ (i.e., the high temperature alarm threshold is set to 50℃), the control module 7 should activate the heat dissipation unit 5 and open the dustproof unit 41 to ensure the unobstructed heat dissipation hole 31 and prevent overheating. When the LCD module is not working and the internal temperature of the front housing assembly 2 is lower than 30℃ (the working stop threshold is 30℃), the control module 7 should stop the heat dissipation unit 5 and the drive unit 43, and at the same time 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 adapts 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 control the drive unit 43 to turn on and off using PWM (pulse width modulation). The specific working process will not be described in detail. The connecting cables between various electrical components must be properly routed to avoid interference and short circuits. Shielded cables can be used if necessary.

[0066] Furthermore, such as 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 requires the selection of appropriate materials, usually plastic or metal. The material of the dustproof net 413 should be stainless steel or other corrosion-resistant materials. The mesh count 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] Furthermore, such as Figure 9As shown, the shielding unit 42 includes a second rotating shaft 421 rotatably disposed inside the rear housing assembly 3, a main shielding plate 422 fixedly connected to the second rotating shaft 421, a side shielding plate 423 disposed on one side of the main shielding plate 422, and auxiliary shielding plates 424 disposed on 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 sets of the auxiliary shielding plates 424 cover the dustproof net 413.

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

[0071] Furthermore, such as Figures 10-11 As shown, the drive unit 43 includes a drive 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 drive member 431 is fixedly disposed inside the rear housing assembly 3. The driving bevel gear 432 is driveably connected to the drive member 431. The first driven bevel gear 433 is driveably connected to the driving bevel gear 432 and is coaxially disposed with the first incomplete gear 434. The first gear 435 is driven by the first incomplete gear 434 and is driven by the first rotating shaft 411 or the second rotating shaft 421 via a transmission belt 436; the second driven bevel gear 437 is driven by the driving bevel gear 432 and is coaxially arranged with the second incomplete gear 438, which is rotatably disposed inside the rear housing assembly 3; the second gear 439 is driven by the second incomplete gear 438 and is driven by the second rotating shaft 421 or the first rotating shaft 411 via a transmission belt 436.

[0072] The drive unit 43 can simultaneously control the opening and closing of the dustproof unit 41 and the shielding unit 42 through a set of drive components 431, which is convenient to use.

[0073] One optional implementation is provided, in which the first gear 435 is driven by the second rotating shaft 421, and the second gear 439 is driven by the first rotating shaft 411. When the blocking unit 42 needs to change from a closed state to an open state, the driving component 431 is activated. After the driving component 431 is activated, it will synchronously drive the first driven bevel gear 433 and the second driven bevel gear 437 to rotate synchronously through the driving bevel gear 432. The first driven bevel gear 433 drives the first incomplete gear 434 to rotate, which in turn drives the first gear 435 to rotate. The first gear 435 drives the second shaft 421 to rotate via the transmission belt 436, which in turn drives the shielding unit 42 to rotate until the shielding unit 42 opens but the dustproof unit 41 remains closed. If the dustproof unit 41 also needs to be opened, the control drive 431 continues to work. Then the first incomplete gear 434 no longer engages with the first gear 435, and the second incomplete gear 438 begins to engage with the second gear 439, which in turn drives the first shaft 411 to rotate via the transmission belt 436, thereby opening the dustproof unit 41.

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

[0075] Furthermore, such as Figure 12 As shown, the dustproof units 41 or shielding units 42 located on both sides inside the rear housing assembly 3 are connected by a transmission unit 8. 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 driven by the first rotating shaft 411 or the second rotating shaft 421 inside the rear housing assembly 3 near the drive unit 43, and the first bevel gear pair 81 is located at the upper end inside the rear housing assembly 3. The transmission rod 82 is rotatably disposed inside the rear housing assembly 3 and is driven by the first bevel gear pair 81. The second bevel gear pair 83 is driven by the first rotating shaft 411 or the second rotating shaft 421 inside the rear housing assembly 3 away from the drive unit 43, and is also driven by the transmission rod 82.

[0076] If only the drive unit 43 is set, it can only control the rotation of the dustproof unit 41 and the shielding unit 42 on one side of the rear housing assembly 3. If it is necessary to control the rotation of the dustproof unit 41 and the shielding unit 42 on the other side, then a transmission unit 8 needs to be set.

[0077] In detail, when the drive unit 431 operates and drives the first rotating shaft 411 or the second rotating shaft 421 on the side close to the drive unit 431 to rotate, the first rotating shaft 411 or the second rotating shaft 421 on that side will drive the transmission rod 82 to rotate through the first bevel gear pair 81. The transmission rod 82 will drive the second bevel gear pair 83 to operate and drive the first rotating shaft 411 or the second rotating shaft 421 on the side away from the drive unit 431 to rotate. Finally, the dustproof unit 41 and the shielding unit 42 on both sides inside the rear housing assembly 3 will rotate synchronously.

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

[0079] Both the first bevel gear pair 81 and the second bevel gear pair 83 consist of two bevel gears that cooperate with each other.

[0080] Furthermore, such as Figures 4-6 As shown, the bottom of the rear housing assembly 3 is also provided with several sets of heat dissipation units 5. Inside the rear housing assembly 3, a guide plate 9 is fixedly provided at the position corresponding to the heat dissipation unit 5. The cross-sectional width of the guide plate 9 increases from bottom to top, that is, the guide plate 9 has an arc-shaped structure, which can quickly guide air from bottom to top to the interior of the front housing assembly 2 and enter from the top end of the front housing assembly 2. After the air enters the top end of the front housing assembly 2, it will quickly diffuse inside the front housing assembly 2 and achieve a high-efficiency heat exchange effect.

[0081] The LCD module includes a front housing assembly 2 and a rear housing assembly 3. The rear housing assembly 3 is designed to facilitate the installation of the dustproof assembly 4. On the other hand, the rear housing assembly 3 increases the internal space of the LCD module, making it easier for air to circulate quickly inside. At the same time, the heat dissipation unit 5 inside the rear housing assembly 3, together with the air guide plate 9, can quickly blow air to the front housing assembly 2, so as to facilitate rapid heat exchange between the air and the circuit boards and other components inside the front housing assembly 2. The design of the air guide plate 9 can effectively improve the internal airflow path, enhance the heat dissipation effect, improve the overall heat dissipation efficiency, and thus effectively improve the heat dissipation effect of the LCD module.

[0082] It should be noted that heat dissipation unit 5 can be a cooling fan.

[0083] Furthermore, such as Figures 1-3 As shown, the front housing assembly 2 also has heat dissipation holes 31 on both sides to further improve the heat dissipation effect of the front housing assembly 2. Furthermore, a dustproof mesh 413 is fixedly installed inside the front housing assembly 2 at the position corresponding to the heat dissipation hole 31. This arrangement can ensure that the front housing assembly 2 has a certain heat dissipation effect while also having a good dustproof effect.

[0084] The present invention also provides a liquid crystal display screen. The aforementioned 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 descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A thin and light liquid crystal module, characterized in that, include: Liquid crystal display panel (1), and front housing assembly (2) configured to cooperate with the liquid crystal display panel (1); And the rear housing assembly (3) disposed at the rear end of the front housing assembly (2); Several sets of heat dissipation holes (31) are respectively opened on both sides of the rear housing assembly (3). The rear housing assembly (3) has a dustproof assembly (4) located at a position corresponding to the heat dissipation hole (31). The dustproof assembly (41) is located near the heat dissipation hole (31) and rotatably disposed inside the rear housing assembly (3), a shielding unit (42) is rotatably disposed inside the rear housing assembly (3) and located near the dustproof unit (41), and a drive unit (43) for driving the dustproof unit (41) and the shielding unit (42) to rotate. 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). The shielding unit (42) includes a second rotating shaft (421) rotatably disposed inside the rear housing assembly (3), a main shielding plate (422) fixedly connected to the second rotating shaft (421), a side shielding plate (423) disposed on one side of the main shielding plate (422), and auxiliary shielding plates (424) disposed on the 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 sets of the auxiliary shielding plates (424) cover the dustproof net (413); The drive unit (43) includes: The drive unit (431) is fixedly disposed inside the rear housing assembly (3); The active bevel gear (432) is connected to the drive unit (431) for transmission. The first driven bevel gear (433) is connected to the driving bevel gear (432) and is coaxially arranged with the first incomplete gear (434); The first gear (435) is driven by the first incomplete gear (434) and is driven by the first rotating shaft (411) or the second rotating shaft (421) via a transmission belt (436); The second driven bevel gear (437) is connected to the driving bevel gear (432) and is coaxially arranged with the second incomplete gear (438), which is rotatably arranged inside the rear housing assembly (3); The second gear (439) is configured to drive the second incomplete gear (438) and is connected to the second rotating shaft (421) or the first rotating shaft (411) via a drive belt (436); The dustproof units (41) or shielding units (42) located on both sides inside the rear housing assembly (3) are connected by a transmission unit (8), the transmission unit (8) comprising: The first bevel gear pair (81) is connected to the first rotating shaft (411) or the second rotating shaft (421) inside the rear housing assembly (3) near the drive unit (43), and the first bevel gear pair (81) is located at the upper end of the interior of the rear housing assembly (3). The transmission rod (82) is rotatably disposed inside the rear housing assembly (3) and is connected to the first bevel gear pair (81) in a transmission manner; The second bevel gear pair (83) is 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 drive unit (43), and is also connected to the transmission rod (82). The bottom of the rear housing assembly (3) is also provided with several sets of heat dissipation units (5).

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

3. A thin and light liquid crystal module according to claim 2, characterized in that, When the LCD module is working normally, the control module (7) will control the drive unit (43) to work and then control the shielding unit (42) to open, and control the heat dissipation unit (5) to work. At the same time, the dustproof unit (41) will shield the heat dissipation hole (31). When the temperature sensor (6) detects that the internal temperature of the front housing assembly (2) exceeds the threshold, 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 the threshold, 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 turned off.

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

5. A thin and light liquid crystal module according to claim 1, characterized in that, The front housing assembly (2) also has heat dissipation holes (31) on both sides, and a dustproof mesh (413) is fixedly installed inside the front housing assembly (2) at the position corresponding to the heat dissipation holes (31).

6. A liquid crystal display screen, comprising a thin and light liquid crystal module as described in any one of claims 1-5, characterized in that, It also includes a mounting bracket, which is connected to the rear housing assembly (3).

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