Backlight module and liquid crystal display device

Abstract

This application provides a backlight module and a liquid crystal display device. The backlight module includes a fixing member, an optical film, a guide valve, a first liquid tank, a second liquid tank, and a heating element. The optical film is connected to the fixing member at least by a spring. The guide valve includes a horizontal portion and a vertical portion; the horizontal portion is connected to the optical film, and a sealing valve is provided on the vertical portion. The first liquid tank is fitted onto the sealing valve. The second liquid tank communicates with the first liquid tank, and a positive electrode and a negative electrode are spaced apart on the inner wall of the second liquid tank. A conductive valve is provided on the liquid surface inside the second liquid tank. The heating element responds to the conductive valve moving to a preset position and contacting the positive and negative electrodes respectively, causing the heating element to be energized and generate heat. This backlight module can prevent the optical film from being exposed to moisture for extended periods, effectively improving the service life of the optical film.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a backlight module and a liquid crystal display device. Background Technology

[0002] With the advent of the information age, people's lives are becoming increasingly inseparable from various electronic display products; for example, liquid crystal displays (LCDs) are becoming more and more widely used due to their advantages such as high brightness and high refresh rate. As the image information output window of electronic products, the importance of LCDs is self-evident. However, LCDs are exposed to the outside air for a long time, and their internal optical films are affected by external moisture. Due to their hygroscopic nature, this can easily have an adverse effect on their lifespan. Summary of the Invention

[0003] The backlight module and liquid crystal display device provided in this application aim to solve the problem that the service life of existing liquid crystal displays is adversely affected by moisture.

[0004] To solve the above-mentioned technical problems, one technical solution adopted in this application is: to provide a backlight module, comprising:

[0005] Fasteners;

[0006] An optical diaphragm is connected to the fixing member at least by a spring; the optical diaphragm is configured to move along a first direction under the combined force of the optical diaphragm's gravity and the supporting force of the spring; the first direction is parallel to the direction of the gravity acting on the optical diaphragm.

[0007] A guide rod valve, comprising a horizontal portion and a vertical portion arranged vertically; wherein the horizontal portion is connected to the optical diaphragm, and a sealing valve is provided on the vertical portion;

[0008] A first liquid tank is fitted onto the sealing valve, and the circumferential edge of the sealing valve abuts against the side wall of the first liquid tank; the portion of the first liquid tank located on the side of the sealing valve opposite to the vertical part is filled with insulating liquid.

[0009] A second liquid tank is connected to the first liquid tank, and the insulating liquid can flow between the first liquid tank and the second liquid tank; a positive electrode and a negative electrode are spaced apart on the inner wall of the second liquid tank; a conductive valve is provided on the liquid surface in the second liquid tank, and the conductive valve is configured to move along the first direction; a through hole is provided on the second liquid tank, through which outside air enters the second liquid tank.

[0010] A heating element, one end of which is electrically connected to the positive electrode or the negative electrode, and the other end of which is electrically connected to the positive or negative electrode of an external power supply;

[0011] Wherein, the diameter of the second liquid tank is smaller than the diameter of the first liquid tank; the negative electrode or the positive electrode that is not electrically connected to the heating element is electrically connected to the negative electrode or the positive electrode of the external power supply; the heating element responds to the conductive valve moving to a preset position and contacting the positive electrode and the negative electrode respectively, and the heating element is energized and heats up.

[0012] In one specific embodiment, it further includes:

[0013] A sealing ring is disposed between the circumferential edge of the sealing valve and the side wall of the first liquid tank.

[0014] In one specific embodiment, the positive electrode and the negative electrode are disposed alternately on the side wall of the second liquid tank;

[0015] The positive electrode and the negative electrode are located on the same horizontal plane.

[0016] In one specific embodiment, the through hole is located on the top wall of the second liquid tank.

[0017] In one specific embodiment, the guide valve is located on one side of the optical diaphragm along the first direction, and the optical diaphragm is suspended from the horizontal portion. The optical diaphragm includes:

[0018] The diaphragm itself;

[0019] The hanging ear is located on the side of the optical diaphragm near the guide valve and protrudes from the diaphragm body; the hanging ear has a suspension hole, through which the optical diaphragm is suspended and connected to the horizontal part.

[0020] In one specific embodiment, the optical diaphragm is connected to the fixing member via the guide rod valve; the guide rod valve is connected to the fixing member via the spring; the guide rod valve is configured to move along the first direction under the combined force of the gravity of the optical diaphragm, the gravity of the guide rod valve, and the supporting force of the spring.

[0021] In one specific embodiment, the fixing member is disposed between the optical diaphragm and the guide valve; the spring is disposed between the fixing member and the guide valve.

[0022] In one specific embodiment, the number of the fixing members and the number of the springs are two;

[0023] The number of loops is two; and the two loops are located on both sides of the center line of the optical film and are equally spaced from the center line of the optical film.

[0024] In one specific embodiment, the heating element is disposed below the optical film.

[0025] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide a liquid crystal display device, including a backlight module as described in any of the above claims.

[0026] The beneficial effects of this application's embodiments: Unlike existing technologies, this application provides a backlight module and a liquid crystal display device; the backlight module includes a fixing member, an optical film, a guide valve, a first liquid tank, a second liquid tank, and a heating element. The optical film is connected to the fixing member at least by a spring; the optical film is configured to move along a first direction under the combined force of the optical film's gravity and the spring's supporting force; the first direction is parallel to the direction of the gravity acting on the optical film; the guide valve includes a horizontal portion and a vertical portion; the horizontal portion is connected to the optical film, and a sealing valve is provided on the vertical portion; the first liquid tank is fitted onto the sealing valve, and the circumferential edge of the sealing valve abuts against the side wall of the first liquid tank; the portion of the first liquid tank located on the side of the sealing valve away from the vertical portion is filled with an insulating liquid; the second liquid tank communicates with the first liquid tank, and the insulating liquid can flow between the first and second liquid tanks. The liquid flows between the two liquid tanks; positive and negative electrodes are spaced apart on the inner wall of the second liquid tank; a conductive valve is provided on the surface of the liquid in the second liquid tank, and the conductive valve is configured to move in a first direction; a through hole is provided on the second liquid tank, through which outside air enters the second liquid tank; one end of the heating element is electrically connected to the positive or negative electrode, and the other end is electrically connected to the positive or negative terminal of an external power supply; wherein, the diameter of the second liquid tank is smaller than the diameter of the first liquid tank; the negative or positive electrode not electrically connected to the heating element is electrically connected to the negative or positive terminal of the external power supply; the heating element responds to the conductive valve moving to a preset position and contacting the positive and negative electrodes respectively, so that the heating element is energized and heats up. By incorporating a guide valve connected to the optical film, the increased weight and downward movement of the film after absorbing water can cause the guide valve to move in the same direction. Furthermore, by setting up interconnected first and second liquid tanks, with the first tank fitted onto a sealing valve at the other end of the guide valve, the downward movement of the guide valve pushes the liquid in both tanks, causing a conductive valve positioned on the liquid surface in the second tank to rise with the liquid level. This connects the positive and negative electrodes, energizing the heating element and drying the moisture inside the optical film. This prevents prolonged exposure to moisture, effectively extending the film's lifespan. Additionally, by making the diameter of the second liquid tank smaller than that of the first tank, the liquid level changes in the second tank are more sensitive, resulting in more responsive conductive valve movement. Attached Figure Description

[0027] Figure 1This is a schematic diagram of the structure of a backlight module provided in one embodiment of this application;

[0028] Figure 2 for Figure 1 A schematic diagram of the structure that causes the heating element to operate by moving the middle conductive valve;

[0029] Figure 3 for Figure 2 A schematic diagram showing how the movement of the central conductive valve stops the heating element from working.

[0030] Figure 4 for Figure 1 The diagram shows the structure of the backlight module after removing the first and second liquid tanks.

[0031] Explanation of icon numbers:

[0032] 1-Fixed component; 2-Optical diaphragm; 3-Guide rod valve; 4-First liquid tank; 5-Second liquid tank; 6-Heating element; 7-Sealing ring; 21-Diaphragm body; 22-Hanging ear; 221-Suspension hole; 31-Horizontal part; 32-Vertical part; 321-Sealing valve; 51-Positive electrode; 52-Negative electrode; 53-Conductive valve; 54-Through hole. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0034] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0035] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0036] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] See Figures 1-4 , Figure 1 This is a schematic diagram of the structure of a backlight module provided in one embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the structure that causes the heating element to operate by moving the middle conductive valve; Figure 3 for Figure 2 A schematic diagram showing how the movement of the central conductive valve stops the heating element from working. Figure 4 for Figure 1 The diagram shows the structure of the backlight module after removing the first and second liquid tanks.

[0038] This application provides a backlight module suitable for moisture or humid environments. The backlight module may also be fitted with a housing to protect and support it. Figure 1 As shown, the backlight module may include a fixing member 1, an optical film 2, a guide valve 3, a first liquid tank 4, a second liquid tank 5, and a heating element 6. The fixing member 1 is fixedly disposed to the outer casing and is used to fix other structural components of the backlight module within the outer casing.

[0039] Optical film 2 is used to display an image; and optical film 2 is connected to fixing member 1 at least by a spring; optical film 2 is configured to move along a first direction X under the combined force of the weight of optical film 2 and the supporting force of the spring. Specifically, optical film 2 can be directly connected to fixing member 1 by spring, or it can be connected by other structural components such as guide valve 3, and then the guide valve 3 is connected to fixing member 1 by spring. It can be understood that the first direction X is parallel to the direction of the gravity acting on optical film 2; combined with Figure 1 and Figure 2 When the optical film 2 absorbs water and its weight increases, the gravity on the optical film 2 is greater than the supporting force of the spring on the optical film 2. The optical film 2 moves downward along the first direction X and squeezes the spring until the supporting force of the spring on the optical film 2 is the same as the gravity on the optical film 2, and then stops moving.

[0040] The guide valve 3 is connected to the optical diaphragm 2 and moves along the first direction X following the optical diaphragm 2. Specifically, the guide valve 3 includes a horizontal portion 31 and a vertical portion 32 arranged vertically; wherein, the horizontal portion 31 is connected to the optical diaphragm 2, and a sealing valve 321 is provided on the vertical portion 32; and the vertical portion 32 is perpendicular to the horizontal portion 31. Specifically, one end of the vertical portion 32 can be connected to the horizontal portion 31, and the other end extends along a plane perpendicular to the first direction X to form the sealing valve 321.

[0041] The first liquid tank 4 is fitted onto the sealing valve 321, with the circumferential edge of the sealing valve 321 abutting against the side wall of the first liquid tank 4, thus isolating the interior of the first liquid tank 4 into two non-communicating spaces. A portion of the space in the first liquid tank 4 located on the side of the sealing valve 321 opposite to the vertical portion 32 is filled with insulating liquid, and this portion of space communicates with the second liquid tank 5, allowing the insulating liquid to flow between the first liquid tank 4 and the second liquid tank 5. In other words, the first liquid tank 4 and the second liquid tank 5 form a communicating vessel structure. The sealing valve 321, driven by the optical diaphragm 2, pushes the liquid in the first liquid tank 4, causing it to flow into the second liquid tank 5, thus raising the liquid level in the second liquid tank 5. The diameter of the second liquid tank 5 is smaller than the diameter of the first liquid tank 4; it can be understood that the change in liquid level between the first liquid tank 4 and the second liquid tank 5 is inversely proportional to their diameters. When the sealing valve 321 pushes the liquid flow, it can create a more significant difference in liquid level within the second liquid tank 5.

[0042] A positive electrode 51 and a negative electrode 52 are spaced apart on the inner wall of the second liquid tank 5. A conductive valve 53 is disposed on the liquid surface inside the second liquid tank 5, and the conductive valve 53 is configured to move along the first direction X with the liquid surface. The positive electrode 51 and the negative electrode 52 are electrically connected through and only through the conductive valve 53; specifically, when the conductive valve 53 moves to contact both the positive electrode 51 and the negative electrode 52 simultaneously, the positive electrode 51 and the negative electrode 52 are electrically connected.

[0043] The second liquid tank 5 is provided with a through hole 54, through which outside air can enter the second liquid tank 5 to balance the atmospheric pressure inside and outside the communicating vessel; combined with Figures 1-3 When the sealing valve 321 moves downward along the first direction X, causing the liquid level in the second liquid tank 5 to rise, it can force the internal air out through the through hole 54; when the sealing valve 321 moves upward along the first direction X, atmospheric pressure can push the liquid level in the second liquid tank 5 to fall. In this way, the electrical connection or disconnection between the positive electrode 51 and the negative electrode 52 can be controlled.

[0044] One end of the heating element 6 is electrically connected to the positive electrode 51 or the negative electrode 52, and the other end is electrically connected to the positive or negative terminal of an external power supply. In response to the conductive valve 53 moving to a preset position and contacting the positive electrode 51 and the negative electrode 52 respectively, the heating element 6 is energized and generates heat. Simultaneously, the negative electrode 52 or the positive electrode 51, which is not electrically connected to the heating element 6, is electrically connected to the negative or positive terminal of the external power supply; that is, one end of the external power supply is electrically connected to the heating element 6, and the other end is electrically connected to the negative electrode 52 or the positive electrode 51. For example, the positive terminal of the external power supply can be electrically connected to the positive electrode 51 through the heating element 6, and the negative terminal of the external power supply can be electrically connected to the negative electrode 52.

[0045] Thus, by setting a guide valve 3 connected to the optical diaphragm 2, when the optical diaphragm 2 absorbs water and its weight increases, causing it to move downwards, the guide valve 3 can move in the same direction. By setting a first liquid tank 4 and a second liquid tank 5 that are interconnected, and by fitting the first liquid tank 4 onto the sealing valve 321 at the other end of the guide valve 3, when the guide valve 3 moves downwards, the sealing valve 321 can push the liquid in the first liquid tank 4 and the second liquid tank 5, causing the conductive valve 53, located on the liquid surface in the second liquid tank 5, to rise with the liquid level. This connects the positive electrode 51 and the negative electrode 52, allowing the heating element 6 to be energized and heated, drying the moisture inside the optical diaphragm 2. This prevents the optical diaphragm 2 from being exposed to moisture for extended periods, effectively improving its service life. Furthermore, by making the diameter of the second liquid tank 5 smaller than that of the first liquid tank 4, the liquid level changes in the second liquid tank 5 are more sensitive than those in the first liquid tank 4, making the movement of the conductive valve 53 more sensitive.

[0046] like Figure 1As shown, the through hole 54 can be set on the top wall of the second liquid tank 5 so that the liquid level in the second liquid tank 5 has sufficient room to rise, and the leakage of insulating liquid from the through hole 54 should be avoided as much as possible to prevent adverse effects or even damage to other structural components of the backlight module.

[0047] Furthermore, within the second liquid tank 5, the positive electrode 51 and the negative electrode 52 can be spaced apart on the side wall of the second liquid tank 5 to reserve some space within the second liquid tank 5, further preventing the insulating liquid from leaking from the through hole 54 and causing adverse effects or even damage to other structural components of the backlight module. Preferably, the positive electrode 51 and the negative electrode 52 are located on the same horizontal plane so that the conductive valve 53 can simultaneously contact the positive electrode 51 and the negative electrode 52, enhancing the sensitivity of electrical conduction. The positive electrode 51 and the negative electrode 52 can be located on opposite sides of the side wall or on the same side of the side wall; this is not limited here, as long as they do not come into contact.

[0048] Of course, in some other embodiments, the positive electrode 51 and the negative electrode 52 can also be spaced apart on the top wall of the second liquid tank 5, and the conductive valve 53 contacts the positive electrode 51 and the negative electrode 52 when it rises to near the top wall to achieve electrical conduction. In other embodiments, the positive electrode 51, the negative electrode 52, and the through hole 54 can all be located on the side wall of the second liquid tank 5, as long as the through hole 54 is located above the positive electrode 51 and the negative electrode 52. The specific positions of the positive electrode 51, the negative electrode 52, and the through hole 54 can be selected according to the actual situation to find the optimal solution.

[0049] like Figure 4 As shown, in a specific embodiment, the backlight module may further include a sealing ring 7, which is sleeved on the outer side of the circumferential edge of the sealing valve 321. Combined with... Figure 1 and Figure 4 The sealing ring 7 can be a rubber ring and is located between the circumferential edge of the sealing valve 321 and the side wall of the first liquid tank 4, so that the sealing ring 7 can be press-fitted with the side wall of the first liquid tank 4 under the support of the sealing valve 321, thereby enhancing the airtightness of the sealing valve 321 and preventing air or insulating liquid on both sides of the sealing valve 321 from flowing to the other side through the gap between the sealing valve 321 and the side wall when the sealing valve 321 moves in the first liquid tank 4, thus affecting the function of the communicating vessel.

[0050] Continue reading Figure 4 In a specific embodiment, the optical diaphragm 2 can be indirectly connected to the fixing member 1; specifically, the guide valve 3 can be suspended and connected to the optical diaphragm 2. Specifically, the guide valve 3 can be located on one side of the optical diaphragm 2 along the first direction X, that is, the guide valve 3 is located above the optical diaphragm 2; and the optical diaphragm 2 is suspended and connected to the horizontal part 31 of the guide valve 3.

[0051] Specifically, the optical diaphragm 2 may include a diaphragm body 21 and a hanging ear 22; wherein, the diaphragm body 21 is used for displaying the image. The hanging ear 22 is located on the side of the optical diaphragm 2 near the guide valve 3 and protrudes from the diaphragm body 21; that is, the hanging ear 22 is located above the diaphragm body 21 to cooperate with the guide valve 3 to suspend the optical diaphragm 2. Furthermore, the hanging ear 22 is provided with a suspension hole 221, through which the optical diaphragm 2 can be suspended and connected to the horizontal part 31. In this way, it is possible to avoid opening holes in the display area of ​​the optical diaphragm 2, the internal structure of the optical diaphragm 2 is less modified, the manufacturing process of the optical diaphragm 2 is simplified, and the manufacturing cost is effectively saved.

[0052] Furthermore, the optical diaphragm 2 can be indirectly connected to the fixing member 1 via the guide rod valve 3. The guide rod valve 3 can be connected to the fixing member 1 via a spring; the guide rod valve 3 is configured to move along the first direction X under the combined force of the gravity of the optical diaphragm 2, the gravity of the guide rod valve 3, and the supporting force of the spring. Figure 1 and Figure 2 When the optical diaphragm 2 absorbs water, increasing its weight, the sum of the gravity acting on the optical diaphragm 2 and the weight of the guide valve 3 itself exceeds the supporting force of the spring on the optical diaphragm 2. The optical diaphragm 2 then moves downwards along the first direction X, compressing the spring until the sum of the gravity acting on the optical diaphragm 2 and the weight of the guide valve 3 equals the supporting force of the spring on the optical diaphragm 2, at which point it stops moving. Figure 2 and Figure 3 When the heating element 6 dries the optical film 2, the weight of the optical film 2 decreases. The sum of the gravity on the optical film 2 and the gravity of the guide rod valve 3 is less than the supporting force of the spring on the optical film 2. The optical film 2 moves upward along the first direction X until the sum of the gravity on the optical film 2 and the gravity of the guide rod valve 3 is the same as the supporting force of the spring on the optical film 2, and then it stops moving.

[0053] Specifically, such as Figure 1 As shown, the fixing member 1 can be disposed between the optical diaphragm 2 and the guide valve 3; the spring can be disposed between the fixing member 1 and the guide valve 3 to achieve an indirect connection between the optical diaphragm 2 and the fixing member 1. It can be understood that when the optical diaphragm 2 moves downward along the first direction X, the guide valve 3 will compress the spring. Therefore, the spring disposed between the fixing member 1 and the guide valve 3 should be a compression spring to achieve compression and recovery of the spring under external force. Thus, through the above arrangement, a lower-cost compression spring can be used to enable the optical diaphragm 2 to move up and down along the first direction X, further reducing the manufacturing cost of the backlight module.

[0054] Of course, in other embodiments, the guide valve 3 can also be disposed between the optical diaphragm 2 and the fixing member 1, and the guide valve 3 and the fixing member 1 are connected by a tension spring so that the optical diaphragm 2 can move up and down along the first direction X.

[0055] Preferably, the number of fixing members 1 and the number of springs can both be two, and they are located near both ends of the horizontal part 31 to enhance the structural stability of the backlight module. Preferably, the number of hanging ears 22 can also be two; and the two hanging ears 22 are located on both sides of the center line of the optical film 2, and are equally spaced from the center line of the optical film 2 to enhance the suspension stability of the optical film 2.

[0056] Of course, in other embodiments, the optical diaphragm 2 can also be directly connected to the fixing member 1 via a spring; for example, the fixing member 1 can be positioned below the optical diaphragm 2 and connected to the optical diaphragm 2 by a compression spring, and the guide valve 3 can be fixedly mounted on the optical diaphragm 2. In this way, the guide valve 3 can also be moved up and down along the first direction X when the weight of the optical diaphragm 2 changes.

[0057] In a specific embodiment, the heating element 6 can be positioned below the optical film 2 to enhance the baking effect of the heating element 6 on the optical film 2. It is understood that the air heated by the heating element 6 will flow upwards, thereby drying the moisture inside the optical film 2. Positioning the heating element 6 below the optical film 2 allows for optimal baking of all parts of the optical film 2 by the hot air.

[0058] This application provides a backlight module; the backlight module includes a fixing member 1, an optical diaphragm 2, a guide valve 3, a first liquid tank 4, a second liquid tank 5, and a heating element 6. The optical diaphragm 2 is connected to the fixing member 1 at least by a spring; the optical diaphragm 2 is configured to move along a first direction X under the combined force of the optical diaphragm 2's gravity and the supporting force of the spring; the first direction X is parallel to the direction of the gravity acting on the optical diaphragm 2; the guide valve 3 includes a horizontal portion 31 and a vertical portion 32; the horizontal portion 31 is connected to the optical diaphragm 2, and a sealing valve 321 is provided on the vertical portion 32; the first liquid tank 4 is sleeved on the sealing valve 321, and the circumferential edge of the sealing valve 321 abuts against the side wall of the first liquid tank 4; the portion of the first liquid tank 4 located on the side of the sealing valve 321 opposite to the vertical portion 32 is filled with an insulating liquid; the second liquid tank 5 communicates with the first liquid tank 4, and the insulating liquid can flow between the first liquid tank 4 and the second liquid tank. The liquid flows between 5; a positive electrode 51 and a negative electrode 52 are spaced apart on the inner wall of the second liquid tank 5; a conductive valve 53 is provided on the liquid surface in the second liquid tank 5, and the conductive valve 53 is configured to move along the first direction X; a through hole 54 is provided on the second liquid tank 5, and outside air enters the second liquid tank 5 through the through hole 54; one end of the heating element 6 is electrically connected to the positive electrode 51 or the negative electrode 52, and the other end is electrically connected to the positive or negative terminal of the external power supply; wherein, the diameter of the second liquid tank 5 is smaller than the diameter of the first liquid tank 4; the negative electrode 52 or the positive electrode 51 that is not electrically connected to the heating element 6 is electrically connected to the negative or positive terminal of the external power supply; the heating element 6 responds to the conductive valve 53 moving to a preset position and contacting the positive electrode 51 and the negative electrode 52 respectively, so that the heating element 6 is energized and heats up. By setting a guide valve 3 connected to the optical diaphragm 2, when the optical diaphragm 2 absorbs water and its weight increases, causing it to move downwards, the guide valve 3 can move in the same direction. By setting up a first liquid tank 4 and a second liquid tank 5 that are interconnected, and placing the first liquid tank 4 on the sealing valve 321 at the other end of the guide valve 3, when the guide valve 3 moves downwards, the sealing valve 321 can push the liquid in the first liquid tank 4 and the second liquid tank 5. This causes the conductive valve 53, located on the liquid surface in the second liquid tank 5, to rise with the liquid level, thereby connecting the positive electrode 51 and the negative electrode 52, energizing the heating element 6 to generate heat and dry the moisture inside the optical diaphragm 2. This prevents the optical diaphragm 2 from being exposed to moisture for extended periods, effectively improving its service life. Furthermore, by making the diameter of the second liquid tank 5 smaller than that of the first liquid tank 4, the liquid level changes in the second liquid tank 5 are more sensitive than those in the first liquid tank 4, making the movement of the conductive valve 53 more sensitive.

[0059] This application also provides a liquid crystal display device, which may include the backlight module involved in the above embodiments.

[0060] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalent elements of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0061] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A backlight module, characterized in that, include: Fasteners; An optical film is connected to the fixing member at least by a spring; The optical diaphragm is configured to move along a first direction under the combined force of the optical diaphragm's gravity and the supporting force of the spring; the first direction is parallel to the direction of the gravity acting on the optical diaphragm. A guide rod valve, comprising a horizontal portion and a vertical portion arranged vertically; wherein the horizontal portion is connected to the optical diaphragm, and a sealing valve is provided on the vertical portion; A first liquid tank is fitted onto the sealing valve, and the circumferential edge of the sealing valve abuts against the side wall of the first liquid tank; the portion of the first liquid tank located on the side of the sealing valve opposite to the vertical part is filled with insulating liquid. A second liquid tank is connected to the first liquid tank, and the insulating liquid can flow between the first liquid tank and the second liquid tank; a positive electrode and a negative electrode are spaced apart on the inner wall of the second liquid tank; a conductive valve is provided on the liquid surface in the second liquid tank, and the conductive valve is configured to move along the first direction; a through hole is provided on the second liquid tank, through which outside air enters the second liquid tank. A heating element, one end of which is electrically connected to the positive electrode or the negative electrode, and the other end of which is electrically connected to the positive or negative electrode of an external power supply; Wherein, the diameter of the second liquid tank is smaller than the diameter of the first liquid tank; the negative electrode or the positive electrode that is not electrically connected to the heating element is electrically connected to the negative electrode or the positive electrode of the external power supply; the heating element responds to the conductive valve moving to a preset position and contacting the positive electrode and the negative electrode respectively, so that the heating element is energized and heats up.

2. The backlight module according to claim 1, characterized in that, Also includes: A sealing ring is disposed between the circumferential edge of the sealing valve and the side wall of the first liquid tank.

3. The backlight module according to claim 1, characterized in that, The positive electrode and the negative electrode are spaced apart on the side wall of the second liquid tank; The positive electrode and the negative electrode are located on the same horizontal plane.

4. The backlight module according to claim 1, characterized in that, The through hole is located on the top wall of the second liquid tank.

5. The backlight module according to claim 1, characterized in that, The guide valve is located on one side of the optical diaphragm along the first direction, and the optical diaphragm is suspended from the horizontal portion. The optical diaphragm includes: The diaphragm itself; The hanging ear is located on the side of the optical diaphragm near the guide valve and protrudes from the diaphragm body; the hanging ear has a suspension hole, through which the optical diaphragm is suspended and connected to the horizontal part.

6. The backlight module according to claim 5, characterized in that, The optical diaphragm is connected to the fixing member via the guide rod valve; the guide rod valve is connected to the fixing member via the spring; the guide rod valve is configured to move along the first direction under the combined force of the gravity of the optical diaphragm, the gravity of the guide rod valve, and the supporting force of the spring.

7. The backlight module according to claim 6, characterized in that, The fixing element is disposed between the optical diaphragm and the guide valve; the spring is disposed between the fixing element and the guide valve.

8. The backlight module according to claim 6, characterized in that, The number of the fixing components and the number of the springs are two; The number of loops is two; and the two loops are located on both sides of the center line of the optical film and are equally spaced from the center line of the optical film.

9. The backlight module according to claim 1, characterized in that, The heating element is located below the optical film.

10. A liquid crystal display device, characterized in that, Includes the backlight module as described in any one of claims 1-9.

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