Liquid crystal display structure

Abstract

The invention belongs to the technical field of liquid crystal display, and particularly relates to a liquid crystal display structure which comprises a back shell, a control panel, a reflective substrate, a backlight assembly, a liquid crystal assembly and a front panel assembly, the control panel, the reflective substrate, the backlight assembly and the liquid crystal assembly are all arranged in the back shell, and the front panel assembly is arranged at the end of the back shell. The air cavity is formed in the reflective substrate, and a plurality of heat dissipation flow channels are formed in the upper cavity wall of the air cavity. The backlight assembly of the liquid crystal display panel can be cooled according to the temperature of each area, too large aging difference of lamp beads is avoided, the liquid crystal display still keeps good light emitting uniformity after long-term work, the possibility that dust blocks a gap between the transparent panel and the mounting frame can be reduced through tail gas flow, and the service life of the liquid crystal display panel is prolonged. The influence of dust on the sealing performance of the sealing rubber strip is reduced, meanwhile, dust entering airflow can be intercepted, dust at the air inlet end is automatically cleaned, and the heat dissipation effect is prevented from being influenced.

Description

Technical Field

[0001] The present invention belongs to the technical field of liquid crystal display, and particularly relates to a liquid crystal display structure. Background Art

[0002] Liquid crystal displays are widely used in various fields of today's life. For example, devices such as televisions, computers, mobile phones, and tablets present rich information with clear pictures. Liquid crystal displays control the transmission and blocking of backlight light by the orientation change of liquid crystal molecules under the action of an electric field, thereby displaying different colors and images.

[0003] Currently, liquid crystal displays are mainly divided into edge-lit and direct-lit types. In the edge-lit type, LED lamp beads are placed on the side of the liquid crystal panel, and the light is redirected by the light guide plate to achieve uniform light output, enabling the picture to be presented. While in the direct-lit type, LED lamp beads are evenly distributed directly behind the liquid crystal panel and emit light directly towards the panel, and the brightness of the picture is adjusted by controlling the brightness of the lamp beads. For example, the direct-lit backlight module and liquid crystal display disclosed in the patent publication number CN105204228B;

[0004] The direct-lit liquid crystal display has many significant advantages. Its brightness uniformity is good, and the light control is extremely precise, capable of easily achieving a high contrast ratio, bringing a high-quality visual experience to users. However, it also has some potential problems. When a certain area of the liquid crystal display continuously displays a high-brightness image, the corresponding lamp bead needs to maintain a high-intensity light-emitting working state for a long time. During this process, the lamp bead will generate a large amount of heat, and the temperature will rise sharply, thereby accelerating the aging process. Since the work tasks borne by the lamp beads in different positions are different, their heat generation amounts are also different. Over time, the aging degrees of each lamp bead will gradually show obvious differences. This phenomenon will ultimately lead to a deviation in the brightness of the picture displayed by the liquid crystal display, seriously affecting the viewing effect and reducing the overall performance of the display. Summary of the Invention

[0005] The purpose of the present invention is to address the above problems and provide a liquid crystal display structure.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A liquid crystal display structure includes a back shell, a control board, a reflective substrate, a backlight assembly, a liquid crystal assembly, and a front panel assembly. The control board, reflective substrate, backlight assembly, and liquid crystal assembly are all arranged inside the back shell. The front panel assembly is arranged at the end of the back shell. It further includes:

[0007] An air cavity is opened inside the reflective substrate, and a plurality of heat dissipation channels are opened on the upper cavity wall of the air cavity. A hole adjusting mechanism is installed inside each of the heat dissipation channels;

[0008] An intake unit is arranged inside the reflective substrate. The intake unit squeezes external air into the inside of the air cavity.

[0009] An exhaust unit is arranged inside the reflective substrate. The air flow discharged from each heat dissipation channel passes through the exhaust unit and is discharged. A temperature measuring component is arranged inside the exhaust unit. The control board controls the operation of the orifice adjusting mechanism and the intake unit according to the electrical signal fed back by the temperature measuring component.

[0010] Preferably, the front panel assembly includes a mounting frame. The mounting frame is detachably connected to the end of the back shell. A support frame is installed inside the mounting frame. A transparent panel is arranged inside the mounting frame. A sealing frame is fixedly installed on the outer edge of the transparent panel. A sealing rubber strip is arranged between the sealing frame and the support frame.

[0011] Preferably, each orifice adjusting mechanism includes an exhaust plate fixedly installed inside the heat dissipation channel. A plurality of fixed exhaust holes are formed in the end face of the exhaust plate. A plugging plate is arranged above the exhaust plate. A plurality of movable exhaust holes are formed in the end face of the plugging plate. An installation groove is formed in the side wall of the heat dissipation channel. An electromagnetic column is fixedly installed inside the installation groove. One end of the plugging plate is fixedly installed with a connecting column. The end of the connecting column far away from the plugging plate extends into the installation groove. Two elastic connection bands are fixedly arranged between the side wall of the connecting column and the groove wall of the installation groove. An iron column is fixedly installed at the end of the connecting column far away from the plugging plate. The electromagnetic column is electrically connected to the control board.

[0012] Preferably, the intake unit includes a mounting sleeve fixedly inserted into the end face of the reflective substrate. Two pistons are slidably arranged on both sides inside the mounting sleeve. A group of elastic connection ropes are fixedly arranged between the side walls of the two pistons and the inner wall of the mounting sleeve. Push rods are fixedly installed on the side walls of the two pistons on the opposite sides. Permanent magnets are fixedly installed at the opposite ends of the two push rods. Electromagnetic blocks are fixedly installed at the positions on both sides of the two permanent magnets inside the mounting sleeve. An intake dust filtering component is arranged on the side wall of the mounting sleeve between the two pistons. An air outlet hole is formed jointly by the side walls of the mounting sleeve and the reflective substrate. The air outlet hole is communicated with the air cavity. Check valves are installed inside both the intake dust filtering component and the air outlet hole. The two electromagnetic blocks are electrically connected to the control board.

[0013] Preferably, the exhaust unit includes a groove plate fixedly inserted into the end face of the reflective substrate. The groove plate is arranged on the side of the reflective substrate away from the mounting sleeve. The groove plate is communicated with each heat dissipation channel. Two exhaust gas holes are formed jointly by the side wall of the groove plate and the side wall of the reflective substrate.

[0014] Preferably, the temperature measuring component includes a plurality of insulating columns fixedly installed inside the groove plate, and a thermistor wire is fixedly installed at the end of each insulating column. One end of each thermistor wire away from the insulating column on the same side extends into the corresponding heat dissipation flow channel, and the thermistor wire is electrically connected to the control board.

[0015] Preferably, a frame-shaped groove is formed in the inner wall of the installation frame at a position outside the sealing strip. Two air inlet grooves are formed jointly by the groove wall of the frame-shaped groove and the end face of the back shell. Round holes are formed in the groove wall of the air inlet groove. Two annular rubber pads matching the round holes are fixedly installed on the inner wall of the back shell. Both round holes are communicated with the corresponding exhaust holes through the annular rubber pads on the same side.

[0016] Preferably, the air inlet dust filtering component includes a three-way pipe arranged between two pistons. The three-way pipe is fixedly inserted into the side wall of the installation sleeve. The air inlet end of the three-way pipe penetrates through the side wall of the back shell. A dust filtering net cover is installed inside the air inlet end of the three-way pipe. One of the one-way valves is arranged inside one of the air outlet ends of the three-way pipe. A normally closed electric control valve is installed inside the other air outlet end of the three-way pipe. A normally open electric control valve is installed inside the air outlet hole.

[0017] Compared with the existing technology, the advantages of a liquid crystal display structure are as follows:

[0018] 1. Through the mutual cooperation of the back shell, control board, reflective substrate, backlight assembly, liquid crystal assembly, front panel assembly, air cavity, heat dissipation flow channel, hole adjusting mechanism, air inlet unit and air outlet unit, by arranging a plurality of heat dissipation flow channels inside the reflective substrate, the LED lamp beads on the reflective substrate can be quickly dissipated, and with the cooperation of the temperature measuring component, it can automatically dissipate heat according to the temperature of each area, making more full use of the heat dissipation air flow, avoiding excessive aging differences between individual lamp beads and other lamp beads due to long-term high-brightness operation, so that the liquid crystal display can still maintain good light emission uniformity after long-term operation, and avoiding excessive bright differences in each area of the liquid crystal display after long-term use, which affects viewing.

[0019] 2. Through the arrangement of the frame-shaped groove, air inlet groove, round hole and annular rubber pad, the exhaust air flow generated during heat dissipation can be utilized to generate an air flow towards the outside of the gap between the transparent panel and the installation frame, thereby reducing the possibility of dust clogging between the transparent panel and the installation frame as much as possible, and further reducing the impact of dust and other impurities on the sealing performance of the sealing strip.

[0020] 3. Through the arrangement of the air inlet dust filtering component, the dust in the incoming air flow can be intercepted to avoid dust entering the heat dissipation flow channel and affecting the heat dissipation effect, and after each intake of air for a period of time, the dust attached to the air inlet end can be automatically cleaned. Brief Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of a liquid crystal display structure provided by the present invention;

[0022] Figure 2 is a schematic structural diagram of a front panel assembly of a liquid crystal display structure provided by the present invention;

[0023] Figure 3 is a schematic cross-sectional structural diagram of a reflective substrate of a liquid crystal display structure provided by the present invention;

[0024] Figure 4 is a liquid crystal display structure provided by the present invention Figure 3 structural enlarged view of part A therein;

[0025] Figure 5 is a liquid crystal display structure provided by the present invention Figure 3 structural enlarged view of part B therein.

[0026] In the figure: 1 back shell, 2 control board, 3 reflective substrate, 4 backlight assembly, 5 liquid crystal assembly, 6 front panel assembly, 61 mounting frame, 62 support frame, 63 transparent panel, 64 sealing frame, 65 sealing strip, 7 air cavity, 8 heat dissipation channel, 9 hole adjusting mechanism, 91 exhaust plate, 92 fixed exhaust hole, 93 plugging plate, 94 movable exhaust hole, 95 mounting groove, 96 electromagnetic column, 97 connecting column, 98 elastic connection band, 99 iron column, 10 intake unit, 101 mounting sleeve, 102 piston, 103 elastic connection rope, 104 push rod, 105 permanent magnet block, 106 electromagnetic block, 107 air outlet hole, 108 one-way valve, 11 air outlet unit, 111 groove plate, 112 tail gas hole, 12 temperature measuring component, 121 insulating column, 122 thermistor wire, 13 intake dust filtering component, 131 three-way pipe, 132 dust filtering net cover, 133 normally closed electric control valve, 134 normally open electric control valve, 14 frame-shaped groove, 15 intake groove, 16 round hole, 17 annular rubber pad. Detailed Description of the Invention

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0028] Such as Figures 1 - 5As shown in the figure, a liquid crystal display structure includes a back shell 1, a control board 2, a reflective substrate 3, a backlight assembly 4, a liquid crystal assembly 5, and a front panel assembly 6. The control board 2, the reflective substrate 3, the backlight assembly 4, and the liquid crystal assembly 5 are all arranged inside the back shell 1. The front panel assembly 6 is arranged at the end of the back shell 1. The front panel assembly 6 includes a mounting frame 61, and the mounting frame 61 is detachably connected to the end of the back shell 1. A support frame 62 is installed inside the mounting frame 61. A transparent panel 63 is arranged inside the mounting frame 61, and a sealing frame 64 is fixedly installed on the outer edge of the transparent panel 63. A sealing strip 65 is arranged between the sealing frame 64 and the support frame 62, and the sealing strip 65 can seal and protect the connection between the mounting frame 61 and the transparent panel 63.

[0029] An air cavity 7 is opened inside the reflective substrate 3, and a plurality of heat dissipation channels 8 are opened on the upper cavity wall of the air cavity 7. A hole adjusting mechanism 9 is installed inside each heat dissipation channel 8. Each hole adjusting mechanism 9 includes an exhaust plate 91 fixedly installed inside the heat dissipation channel 8. A plurality of fixed exhaust holes 92 are opened on the end face of the exhaust plate 91. A plugging plate 93 is arranged above the exhaust plate 91, and a plurality of movable exhaust holes 94 are opened on the end face of the plugging plate 93. An installation groove 95 is opened on the side wall of the heat dissipation channel 8, and an electromagnetic column 96 is fixedly installed inside the installation groove 95. One end of the plugging plate 93 is fixedly installed with a connecting column 97, and the end of the connecting column 97 away from the plugging plate 93 extends into the installation groove 95. Two elastic connection bands 98 are fixedly arranged between the side wall of the connecting column 97 and the groove wall of the installation groove 95. The end of the connecting column 97 away from the plugging plate 93 is fixedly installed with an iron column 99, and the electromagnetic column 96 is electrically connected to the control board 2.

[0030] An air intake unit 10 is arranged inside the reflective substrate 3. The air intake unit 10 squeezes the external air into the air cavity 7. The air intake unit 10 includes an installation sleeve 101 fixedly inserted on the end face of the reflective substrate 3. Two pistons 102 are slidably arranged on both sides inside the installation sleeve 101, and a group of elastic connection ropes 103 are fixedly arranged between the side walls of the two pistons 102 and the inner wall of the installation sleeve 101. Push rods 104 are fixedly installed on the side walls of the two pistons 102 on the opposite sides, and permanent magnet blocks 105 are fixedly installed on the opposite ends of the two push rods 104. Electromagnetic blocks 106 are fixedly installed at positions on both sides of the two permanent magnet blocks 105 inside the installation sleeve 101. An air intake dust filtering component 13 is arranged at the position between the two pistons 102 on the side wall of the installation sleeve 101. An air outlet hole 107 is jointly opened on the side walls of the installation sleeve 101 and the reflective substrate 3, and the air outlet hole 107 is communicated with the air cavity 7. Check valves 108 are installed inside both the air intake dust filtering component 13 and the air outlet hole 107. Both electromagnetic blocks 106 are electrically connected to the control board 2.

[0031] The air intake and dust filtering assembly 13 includes a tee pipe 131 disposed between two pistons 102, and the tee pipe 131 is fixedly inserted into the side wall of the mounting sleeve 101. The air intake end of the tee pipe 131 penetrates through the side wall of the back shell 1. A dust filtering net cover 132 is installed inside the air intake end of the tee pipe 131. One of the one-way valves 108 is disposed inside one of the air outlet ends of the tee pipe 131. A normally closed electric control valve 133 is installed inside the other air outlet end of the tee pipe 131. A normally open electric control valve 134 is installed inside the air outlet hole 107. The dust filtering net cover 132 can intercept and filter the dust in the incoming air.

[0032] The air outlet unit 11 is disposed inside the reflective substrate 3. The air flow discharged from each heat dissipation channel 8 is discharged through the air outlet unit 11. A temperature measuring component 12 is disposed inside the air outlet unit 11. The control board 2 controls the operation of the orifice adjusting mechanism 9 and the air intake unit 10 according to the electrical signal fed back by the temperature measuring component 12. The air outlet unit 11 includes a groove plate 111 fixedly inserted into the end face of the reflective substrate 3, and the groove plate 111 is disposed on the side of the reflective substrate 3 away from the mounting sleeve 101. The groove plate 111 communicates with each heat dissipation channel 8. Two exhaust holes 112 are jointly formed in the side wall of the groove plate 111 and the side wall of the reflective substrate 3.

[0033] The temperature measuring component 12 includes a plurality of insulating columns 121 fixedly installed inside the groove plate 111, and a thermistor wire 122 is fixedly installed at the end of each insulating column 121. One end of each thermistor wire 122 away from the insulating column 121 on the same side extends into the corresponding heat dissipation channel 8. The thermistor wire 122 is electrically connected to the control board 2. Within a certain temperature range, the resistance of the thermistor wire 122 decreases as the temperature increases.

[0034] A frame-shaped groove 14 is formed in the inner wall of the mounting frame 61 at a position outside the sealing rubber strip 65. Two air intake grooves 15 are jointly formed in the groove wall of the frame-shaped groove 14 and the end face of the back shell 1. Round holes 16 are formed in the groove wall of the air intake grooves 15. Two annular rubber gaskets 17 matching the round holes 16 are fixedly installed on the inner wall of the back shell 1. Both round holes 16 are connected to the corresponding exhaust holes 112 through the annular rubber gaskets 17 on the same side. The annular rubber gaskets 17 can prevent the air flow from flowing away through the gap between the reflective substrate 3 and the back shell 1.

[0035] The operating principle of the present invention will be described as follows: When the liquid crystal display is working, the backlight assembly 4 emits light (the backlight module includes components such as a plurality of LED lamp beads, a diffusion film, and a prism film). The light is processed by films such as the diffusion film and the prism film and then irradiates to the liquid crystal assembly 5, and is projected to the front panel assembly 6 through the liquid crystal assembly 5. Personnel can view the image information displayed on the liquid crystal display through the transparent panel 63 of the front panel assembly 6 when the liquid crystal display is working;

[0036] The control board 2 will turn on the current signal intensity of the connection loop between each thermistor wire 122 and its own measurement circuit. When the backlight assembly 4 is working, since the lamp beads generate heat, the temperature at the reflective substrate 3 will gradually increase. At this time, the temperature of the thermistor wire 122 will also increase. And within the range of -10°C to 100°C, the resistance of the thermistor wire 122 itself decreases as the temperature increases. Therefore, after the temperature of the reflective substrate 3 increases, the measurement circuit of the control board 2 measures that the current signal intensity of the connection loop of the corresponding thermistor wire 122 becomes larger. When the current signal intensity exceeds 15 milliamperes, the control board 2 will start the heat dissipation work;

[0037] When the control board 2 starts the heat dissipation work, it will control the two electromagnetic blocks 106 to work at a frequency of being energized for 3 seconds and de-energized for 3 seconds. When the electromagnetic block 106 is energized, the electromagnetic block 106 generates a magnetic repulsive force on the permanent magnet block 105 on the same side. Therefore, the permanent magnet block 105 will push the piston 102 away from the electromagnetic block 106 on the same side through the push rod 104 on the same side, that is, the two pistons 102 move towards each other. Therefore, the air between the two pistons 102 will be squeezed. Under the action of the two one-way valves 108, the air flow can only enter the air cavity 7 through the air outlet holes 107 and flow into the internal of each heat dissipation channel 8. And when the control board 2 starts the heat dissipation work, it will also connect the connection loop between each electromagnetic column 96 and the corresponding thermistor wire 122. When the displayed image continuously maintains a high-brightness state, the LED lamp beads at the corresponding positions need to work at a high brightness. At this time, the heat generated by the LED lamp beads increases, so the temperature of the corresponding area also increases. At this time, the temperature detected by the thermistor wire 122 at this position also increases. Therefore, the resistance of the connection loop between the thermistor wire 122 and the corresponding electromagnetic column 96 decreases. Therefore, the current intensity flowing into the electromagnetic column 96 also increases. After the electromagnetic column 96 is energized, it generates a magnetic attraction force on the iron column 99 on the same side. The greater the current flowing into the electromagnetic column 96, the greater the magnetic attraction force of the electromagnetic column 96 on the iron column 99. Therefore, the greater the displacement distance of the iron column 99 pulling the plugging plate 93 through the connecting column 97. At this time, the movable exhaust holes 94 on the plugging plate 93 and the fixed exhaust holes 92 on the exhaust plate 91 gradually coincide. Therefore, the air flow pores available for the heat dissipation channel 8 to flow through increase. Therefore, at the high-brightness position of the image of the liquid crystal display, the air flow pores available for the corresponding position of the reflective substrate 3 to flow through will increase accordingly. Therefore, the air flow that can flow through this position increases. Therefore, the heat dissipation efficiency at this position increases. On the contrary, in the area with a lower temperature, the heat dissipation efficiency decreases. By reducing the air flow flowing through the area with a lower temperature and increasing the area flowing through the area with a higher temperature, the temperature difference of the LED lamp beads in each area can be minimized as much as possible. Thus, the aging degree of each LED lamp bead can be kept as close as possible. This can avoid the phenomenon that the aging degree difference of the LED lamp beads is too large, resulting in too large a brightness deviation in the displayed image;

[0038] Secondly, the air flow passing through each heat dissipation channel 8 will enter the interior of the groove plate 111, and through the two exhaust holes 112, the annular rubber pad 17, the round hole 16, the air inlet groove 15 and the frame-shaped groove 14, the air flow will finally enter the connection gap between the mounting frame 61 and the transparent panel 63. Subsequently, the air flow is discharged outward through this connection gap, so that dust and other impurities at this connection gap can be blown away, avoiding dust intrusion into the liquid crystal display and affecting the working quality of the liquid crystal display;

[0039] Among them, after the controller starts the heat dissipation work, it will time through its own timing module. After every 1 hour of timing, it will control the normally open electric control valve 134 and the normally closed electric control valve 133 to be energized for 10 seconds. After the normally open electric control valve 134 and the normally closed electric control valve 133 are energized, the air squeezed by the two pistons 102 cannot be discharged through the air outlet hole 107 and can only flow outwards reversely through the three-way pipe 131. The air flow flowing outwards will blow away the dust attached to the surface of the filter screen cover, thus avoiding dust from affecting the filtering effect of the filter screen cover.

[0040] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, 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 liquid crystal display structure, comprising a back shell (1), a control panel (2), a reflective substrate (3), a backlight assembly (4), a liquid crystal assembly (5) and a front panel assembly (6), wherein the control panel (2), the reflective substrate (3), the backlight assembly (4) and the liquid crystal assembly (5) are all arranged inside the back shell (1), and the front panel assembly (6) is arranged at the end of the back shell (1), characterized in that: Also includes: An air cavity (7) is provided inside the reflective substrate (3), and a plurality of heat dissipation channels (8) are provided on the upper cavity wall of the air cavity (7), and a hole adjustment mechanism (9) is installed inside each of the heat dissipation channels (8); An air intake unit (10) is arranged inside the reflective substrate (3), and the air intake unit (10) squeezes external air into the air cavity (7); An air outlet unit (11) is arranged inside the reflective substrate (3), and the airflow discharged from each heat dissipation channel (8) is discharged through the air outlet unit (11). A temperature measuring component (12) is arranged inside the air outlet unit (11), and the control board (2) controls the operation of the hole adjustment mechanism (9) and the air intake unit (10) according to the electrical signal fed back by the temperature measuring component (12).

2. A liquid crystal display structure according to claim 1, characterized in that: The front panel assembly (6) comprises a mounting frame (61), the mounting frame (61) is detachably connected to the end of the back shell (1), a support frame (62) is installed inside the mounting frame (61), a transparent panel (63) is provided inside the mounting frame (61), and a sealing frame (64) is fixedly installed on the outer edge of the transparent panel (63), and a sealing strip (65) is provided between the sealing frame (64) and the support frame (62).

3. A liquid crystal display structure according to claim 1, characterized in that: Each of the hole adjustment mechanisms (9) comprises an exhaust plate (91) fixedly mounted inside the heat dissipation channel (8), a plurality of fixed exhaust holes (92) being provided on the end surface of the exhaust plate (91), a blocking plate (93) being arranged above the exhaust plate (91), and a plurality of movable exhaust holes (94) being provided on the end surface of the blocking plate (93), a mounting groove (95) being provided on the side wall of the heat dissipation channel (8), and an electromagnetic column (95) being fixedly mounted inside the mounting groove (95). 6), a connecting column (97) is fixedly mounted on one end of the blocking plate (93), and an end of the connecting column (97) away from the blocking plate (93) extends to the inside of the mounting groove (95), two elastic connecting belts (98) are fixedly arranged between the side wall of the connecting column (97) and the groove wall of the mounting groove (95), an iron column (99) is fixedly mounted on one end of the connecting column (97) away from the blocking plate (93), and the electromagnetic column (96) is electrically connected to the control board (2).

4. A liquid crystal display structure according to claim 2, characterized in that: The air intake unit (10) comprises a mounting sleeve (101) fixedly plugged into the end surface of the reflective substrate (3), two pistons (102) are slidably arranged on both sides of the interior of the mounting sleeve (101), and a group of elastic connecting ropes (103) are fixedly arranged between the side walls of the two pistons (102) and the inner wall of the mounting sleeve (101), push rods (104) are fixedly installed on the side walls on the opposite sides of the two pistons (102), and permanent magnets (105) are fixedly installed on the opposite ends of the two push rods (104), and the interior of the mounting sleeve (101) is located An electromagnetic block (106) is fixedly installed at a position on the opposite side of the two permanent magnet blocks (105); an air intake dust filter assembly (13) is arranged at a position between the two pistons (102) on the side wall of the mounting sleeve (101); an air outlet hole (107) is provided on the side wall of the mounting sleeve (101) and the reflective substrate (3); and the air outlet hole (107) is communicated with the air cavity (7); a one-way valve (108) is installed inside the air intake dust filter assembly (13) and the air outlet hole (107); and the two electromagnetic blocks (106) are electrically connected to the control panel (2).

5. A liquid crystal display structure according to claim 4, characterized in that: The air outlet unit (11) comprises a slot plate (111) fixedly plugged into the end surface of the reflective substrate (3), and the slot plate (111) is arranged on a side of the reflective substrate (3) away from the mounting sleeve (101), the slot plate (111) is connected to each heat dissipation channel (8), and the side wall of the slot plate (111) and the side wall of the reflective substrate (3) are jointly provided with two exhaust holes (112).

6. A liquid crystal display structure according to claim 5, characterized in that: The temperature measuring component (12) comprises a plurality of insulating columns (121) fixedly mounted inside the slot plate (111), and a thermistor wire (122) is fixedly mounted at the end of each insulating column (121), and one end of each thermistor wire (122) away from the insulating column (121) on the same side extends to the inside of the corresponding heat dissipation channel (8), and the thermistor wire (122) is electrically connected to the control board (2).

7. A liquid crystal display structure according to claim 5, characterized in that: The inner wall of the installation frame (61) is provided with a frame-shaped groove (14) at a position outside the sealing rubber strip (65); the groove wall of the frame-shaped groove (14) and the end surface of the back shell (1) are jointly provided with two air inlet grooves (15); the groove wall of the air inlet groove (15) is provided with a circular hole (16); the inner wall of the back shell (1) is fixedly provided with two annular rubber pads (17) matching the circular holes (16); the two circular holes (16) are both connected to the corresponding exhaust holes (112) through the annular rubber pads (17) on the same side.

8. A liquid crystal display structure according to claim 4, characterized in that: The air intake dust filter assembly (13) comprises a three-way pipe (131) arranged between the two pistons (102), and the three-way pipe (131) is fixedly plugged with the side wall of the mounting sleeve (101), the air intake end of the three-way pipe (131) passes through the side wall of the back shell (1), a dust filter cover (132) is installed inside the air intake end of the three-way pipe (131), one of the one-way valves (108) is arranged inside one of the air outlet ends of the three-way pipe (131), a normally closed electric control valve (133) is installed inside the other air outlet end of the three-way pipe (131), and a normally open electric control valve (134) is installed inside the air outlet hole (107).

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