Backlight module and display panel

Abstract

This application provides a backlight module and a display panel. The backlight module includes a backplate, a light guide plate, a liquid storage bag, and a piston assembly. The backplate has multiple heat dissipation holes. The light guide plate is spaced apart from at least a portion of the backplate's sidewalls and forms a mounting groove. The liquid storage bag is disposed within the mounting groove, stores liquid, and has a first outlet. The piston assembly includes a first cylinder and a piston rod. One end of the first cylinder communicates with the liquid storage bag through the first outlet, and the other end is fitted onto the piston rod. The piston rod has multiple heat dissipation valves corresponding to the heat dissipation holes. The piston assembly responds to deformation of the light guide plate, squeezing the liquid storage bag, causing liquid in the bag to enter the first cylinder and push the piston rod, thereby opening the heat dissipation valves and exposing the heat dissipation holes. This backlight module can avoid overheating, effectively reducing the risk of display panel image abnormalities and improving its service life.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a backlight module and a display panel. Background Technology

[0002] A liquid crystal display (LCD) is a non-self-emissive electronic device. It does not emit light itself and relies on a backlight module to achieve its display performance. Therefore, the brightness of an LCD is determined by its backlight module. It is evident that the performance of the backlight module directly affects the display quality of the LCD panel. A backlight module typically includes a backplate, a light source, a reflector, a light guide plate, a diffuser, optical films, driving circuitry, and a frame.

[0003] As existing LCD monitors pursue ever-increasing refresh rates and resolutions, it inevitably leads to an increase in their operating temperature. If the internal temperature of the backlight module is too high and cannot be dissipated in time, it will increase the risk of abnormal image display on the display panel after long-term use, thus shortening its lifespan. Summary of the Invention

[0004] This application provides a backlight module and a display panel, which aims to solve the problem of excessively high internal temperature of the backlight module in existing liquid crystal display panels, which leads to abnormal image display and affects the service life.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application is: to provide a backlight module, comprising:

[0006] The back plate has a receiving cavity; the back plate is provided with a plurality of heat dissipation holes, which are used to connect the receiving cavity with the outside air;

[0007] A light guide plate is disposed within the receiving cavity, and the light guide plate is at least spaced from a portion of the sidewall of the back plate and surrounds it to form a mounting groove;

[0008] A liquid storage bag is disposed in the mounting groove, with one side of the liquid storage bag abutting against the light guide plate and the other side abutting against the side wall of the back plate; the liquid storage bag stores liquid and has a first liquid outlet;

[0009] The piston assembly includes a first cylinder and a piston rod; one end of the first cylinder is connected to the liquid storage bag through the first liquid outlet, and the other end is sleeved on the piston rod; the piston rod is provided with a plurality of heat dissipation valves corresponding to the plurality of heat dissipation holes;

[0010] The piston assembly responds to the deformation of the light guide plate and squeezes the liquid storage bag, causing the liquid in the storage bag to enter the first cylinder and push the piston rod to open the heat dissipation valve and expose the heat dissipation hole.

[0011] In one specific embodiment, the backplate further includes:

[0012] A limiting part; the limiting part is provided with a through hole that extends through the limiting part along the length direction of the piston rod, and the limiting part is sleeved on the circumferential periphery of the piston rod through the through hole;

[0013] The piston assembly also includes:

[0014] A spring is sleeved around the circumference of the piston rod; and along the length direction, one end of the spring is fixedly connected to the piston rod, and the other end abuts against the limiting part;

[0015] The piston rod is configured to deform the spring during the opening of the heat dissipation valve, so that the spring provides a restoring force to the piston rod.

[0016] In one specific embodiment, the piston assembly further responds to the light guide plate restoring its deformation, the piston rod, under the push of the spring's reset force, closes the heat dissipation valve to cover the heat dissipation hole, and pushes the liquid in the first cylinder back into the reservoir bag.

[0017] In one specific embodiment, the first cylinder body is sleeved on the first end of the piston rod and is interference-fitted with the first end; the first cylinder body includes:

[0018] The liquid inlet is located at the end of the first cylinder body away from the piston rod and is sleeved with the first liquid outlet; the first cylinder body is connected to the liquid storage bag through the liquid inlet.

[0019] An exhaust port is located at one end of the first cylinder body near the piston rod; the first cylinder body communicates with the receiving cavity through the exhaust port.

[0020] The first end is configured to slide back and forth between the liquid inlet and the exhaust outlet along the length direction under the action of an external force.

[0021] In one specific embodiment, the maximum deformation of the spring along the length direction is less than or equal to the distance between the liquid inlet and the vent along the length direction.

[0022] In one specific embodiment, the liquid storage bag further has a second liquid outlet; the piston assembly further includes a second cylinder body communicating with the second liquid outlet; wherein the second cylinder body is sleeved on the second end of the piston rod away from the first end, and is interference-fitted with the second end;

[0023] The liquid inlet of the second cylinder is located at one end of the second cylinder near the piston rod, and the vent of the second cylinder is located at one end of the second cylinder away from the piston rod.

[0024] In one specific embodiment, the mounting groove is annular; the liquid storage bag is annular and is arranged around the circumferential periphery of the light guide plate.

[0025] In one specific embodiment, the back plate further includes a limiting plate; the limiting plate divides the receiving cavity into a first receiving cavity and a second receiving cavity;

[0026] The light guide plate and the liquid storage bag are disposed in the first receiving cavity; the piston assembly is disposed in the second receiving cavity.

[0027] In one specific embodiment, the limiting plate is provided with a plurality of heat dissipation vents; the first receiving cavity is connected to the second receiving cavity through the heat dissipation vents.

[0028] To solve the above-mentioned technical problems, one technical solution adopted in this application is: to provide a display panel, comprising:

[0029] Backlight module; the backlight module is any of the backlight modules described above;

[0030] A liquid crystal module is disposed on the light-emitting side of the backlight module.

[0031] The beneficial effects of this application's embodiments are as follows: Unlike existing technologies, this application provides a backlight module, including a backplate, a light guide plate, a liquid storage bag, and a piston assembly. The backplate has a receiving cavity and multiple heat dissipation holes for connecting the receiving cavity to the outside air. The light guide plate is disposed within the receiving cavity, and is spaced apart from at least a portion of the backplate's sidewalls to form a mounting groove. The liquid storage bag is disposed within the mounting groove, with one side abutting against the light guide plate and the other side abutting against the sidewall of the backplate. The liquid storage bag contains liquid and has a first outlet. The piston assembly includes a first cylinder and a piston rod. One end of the first cylinder communicates with the liquid storage bag through the first outlet, and the other end is sleeved on the piston rod. The piston rod has multiple heat dissipation valves corresponding to the multiple heat dissipation holes. The piston assembly responds to the deformation of the light guide plate, squeezing the liquid storage bag, causing the liquid in the bag to enter the first cylinder and push the piston rod, thereby opening the heat dissipation valves and exposing the heat dissipation holes. By setting a liquid storage bag between the light guide plate and the back plate, and connecting the outlet of the liquid storage bag to the piston assembly to form a hydraulic piston structure, the deformation generated by the thermal expansion of the light guide plate is converted into the power to push the piston rod to open the heat dissipation valve. This allows the air carrying heat inside the backlight module to be discharged to the outside through the heat dissipation holes, thereby realizing heat exchange between the inside of the backlight module and the outside environment. This avoids the backlight module from overheating, effectively reduces the risk of screen abnormalities, and improves the service life. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a backlight module provided in one embodiment of this application;

[0033] Figure 2 for Figure 1 The diagram shows the structure of the backplate in the backlight module.

[0034] Figure 3 for Figure 1 The diagram shows the structure of the backlight module without the liquid storage bag and piston assembly.

[0035] Figure 4 for Figure 1 A schematic diagram of the piston rod in the backlight module shown;

[0036] Figure 5 for Figure 1 Cross-sectional view along line AA at point A in the middle;

[0037] Figure 6 for Figure 1 Cross-sectional view along line AA at point B in the middle;

[0038] Figure 7a for Figure 1 A magnified view of a section at point C;

[0039] Figure 7b for Figure 7a The diagram shows a structure without the piston rod and spring.

[0040] Figure 8 This is a schematic diagram of the structure of a display panel provided in one embodiment of this application.

[0041] Explanation of icon numbers:

[0042] 100-Backlight module; 200-LCD module; 1-Back plate; 2-Light guide plate; 3-Liquid storage bag; 4-Piston assembly; 10-Receiving cavity; 11-Heat dissipation hole; 12-Limiting part; 13-Limiting plate; 30-Mounting groove; 31-First liquid outlet; 32-Second liquid outlet; 41-First cylinder; 42-Piston rod; 43-Heat dissipation valve; 44-Spring; 45-Second cylinder; 101-First receiving cavity; 102-Second receiving cavity; 120-Through hole; 130-Heat dissipation port; 411-First section; 412-Second section; 421-First end; 422-Second end; 451-Third section; 452-Fourth section; 401-Liquid inlet; 402-Exhaust port. Detailed Implementation

[0043] 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.

[0044] 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.

[0045] 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.

[0046] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0047] See Figures 1-7b , 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 The diagram shows the structure of the backplate in the backlight module. Figure 3 for Figure 1 The diagram shows the structure of the backlight module without the liquid storage bag and piston assembly. Figure 4 for Figure 1 A schematic diagram of the piston rod in the backlight module shown; Figure 5 for Figure 1 Cross-sectional view along line AA at point A in the middle; Figure 6 for Figure 1 Cross-sectional view along line AA at point B in the middle; Figure 7a for Figure 1 A magnified view of a section at point C;

[0048] Figure 7b for Figure 7a The diagram shown is a structural schematic excluding the piston rod and spring. Figure 1 As shown, this application provides a backlight module 100 for providing backlight and ensuring that the backlight is uniformly transmitted through the liquid crystal module; the backlight module 100 may include a back plate 1, a light guide plate 2, a liquid storage bag 3, and a piston assembly 4.

[0049] The backplate 1 supports and carries other optical components in the backlight module 100. Specifically, the backplate 1 can be made of metal to help dissipate heat from the light source, avoiding overheating problems caused by prolonged operation and extending the lifespan of the light source and the backlight module 100. In conjunction with... Figure 2The backlight module 100 has a receiving cavity 10 for accommodating the light guide plate 2, the liquid storage bag 3, and the piston assembly 4. A plurality of heat dissipation holes 11 are provided on the back plate 1 to connect the receiving cavity 10 with the outside air, allowing air inside the backlight module 100 to be discharged to the outside through the heat dissipation holes 11. Specifically, the plurality of heat dissipation holes 11 can be disposed on the side wall of the back plate 1 along the first direction Y, and arranged sequentially at intervals along the length direction X; wherein, the length direction X is perpendicular to the first direction Y, and both the length direction X and the first direction Y are perpendicular to the stacking direction of the backlight module 100.

[0050] A light guide plate 2 is disposed within the receiving cavity 10 to allow light from point light sources (such as LEDs) introduced from the edges or ends to propagate internally via total internal reflection, transforming it into a large-area, uniform surface light source. Specifically, the light guide plate 2 has internal microstructures (such as dots, prisms, etc.) that allow light to diffuse across the entire area of ​​the panel after multiple reflections. Figure 3 The light guide plate 2 is spaced apart from at least part of the side wall of the back plate 1 and forms an installation groove 30 to accommodate the liquid storage bag 3; that is, the installation groove 30 is at least located on one side of the light guide plate 2 along the length direction X or the first direction Y.

[0051] A liquid storage bag 3 is disposed within the mounting groove 30. The liquid storage bag 3 contains liquid and has a first outlet 31. The liquid storage bag 3 can be made of polyethylene material, allowing the liquid inside to be squeezed out through the outlet when subjected to external pressure. The liquid can be pure water or other non-corrosive liquid. Specifically, one side of the liquid storage bag 3 abuts against the edge of the light guide plate 2, and the other side abuts against the side wall of the back plate 1, so that when the light guide plate 2 deforms due to thermal expansion, the light guide plate 2 can promptly squeeze the liquid storage bag 3. Simultaneously, the liquid storage bag 3 also acts as a buffer, providing good protection for the light guide plate 2. Furthermore, the liquid inside the liquid storage bag 3 can absorb heat from the backlight module 100, thus providing a cooling effect to some extent.

[0052] The piston assembly 4 can be disposed within the receiving cavity 10 and located on one side of the light guide plate 2 along the first direction Y. Specifically, in conjunction with Figure 5The piston assembly 4 may include a first cylinder 41 communicating with the liquid storage bag 3 and a piston rod 42 sleeved on the first cylinder 41. The first cylinder 41 is a hollow structure and is fixedly mounted on the side wall of the back plate 1. One end of the first cylinder 41 is connected to the liquid storage bag 3 through a first liquid outlet 31, allowing liquid in the storage bag 3 to enter the first cylinder 41 through the first liquid outlet 31 under pressure. The other end of the first cylinder 41 is sleeved on the piston rod 42, which is equipped with multiple heat dissipation valves 43 corresponding to multiple heat dissipation holes 11. The multiple heat dissipation valves 43 are fixedly connected to the piston rod 42, and when closed, the heat dissipation valves 43 cover the corresponding heat dissipation holes 11. The piston rod 42 can slide along its length X under the push of the liquid to open the heat dissipation valves 43 and expose the heat dissipation holes 11.

[0053] Specifically, in combination Figure 1 and Figure 5 The piston assembly 4 deforms in response to the light guide plate 2 and squeezes the liquid storage bag 3, causing the liquid in the liquid storage bag 3 to enter the first cylinder 41 and push the piston rod 42 to open the heat dissipation valve 43 and expose the heat dissipation hole 11. Thus, this embodiment of the application, by setting the liquid storage bag 3 between the light guide plate 2 and the back plate 1, and connecting the outlet of the liquid storage bag 3 to the piston assembly 4, forms a hydraulic piston structure. This converts the deformation generated by the thermal expansion of the light guide plate 2 into the power to push the piston rod 42 to open the heat dissipation valve 43, allowing the air carrying heat inside the backlight module 100 to be discharged to the outside through the heat dissipation hole 11. This achieves heat exchange between the inside of the backlight module 100 and the outside environment, thereby preventing the backlight module 100 from overheating, effectively reducing the risk of image abnormalities on the display panel, and improving its service life.

[0054] In a specific embodiment, the piston assembly 4 can be disposed inside the receiving cavity 10 of the back plate 1 or outside the back plate 1. The following embodiments of this application are all described with the piston assembly 4 disposed inside the receiving cavity 10 and located on one side of the receiving cavity 10 along the first direction Y as an example.

[0055] Specifically, such as Figure 2 As shown, the back plate 1 may further include a limiting plate 13, which is disposed on the side of the receiving cavity 10 near the heat dissipation hole 11, and divides the receiving cavity 10 into a first receiving cavity 101 and a second receiving cavity 102. Wherein, combined with Figure 1 The light guide plate 2 and the liquid storage bag 3 are disposed in the first receiving cavity 101, and the piston assembly 4 is disposed in the second receiving cavity 102, so as to avoid the light guide plate 2 deforming and squeezing the piston assembly 4, affecting the sliding of the piston rod 42, and causing the opening of the heat dissipation valve 43 to be blocked.

[0056] like Figure 3As shown, in a specific embodiment, the mounting groove 30 can be annular and arranged around the circumferential periphery of the light guide plate 2. Specifically, the edge of the light guide plate 2 near the second receiving cavity 102 is spaced apart from the limiting plate 13, and the edges of several other sides of the light guide plate 2 are spaced apart from the sidewalls of the back plate 1, to form an annular mounting groove 30. The liquid storage bag 3 is also annular and arranged around the circumferential periphery of the light guide plate 2, that is, the portion of the liquid storage bag 3 near the second receiving cavity 102 is disposed between the light guide plate 2 and the limiting plate 13, and its two sides along the first direction Y respectively abut against the edge of the light guide plate 2 and the limiting plate 13; the remaining portion of the liquid storage bag 3 is disposed between the light guide plate 2 and the sidewalls of the back plate 1.

[0057] Furthermore, such as Figure 2 As shown, the limiting plate 13 is also provided with a plurality of heat dissipation vents 130. The first receiving cavity 101 can be connected to the second receiving cavity 102 through the heat dissipation vents 130, so that the heat in the first receiving cavity 101 can be transferred to the second receiving cavity 102 through the heat dissipation vents 130. Specifically, the plurality of heat dissipation vents 130 can be arranged sequentially at intervals along the length direction X on the limiting plate 13.

[0058] See Figure 4 In a specific embodiment, the piston rod 42 has a first end 421 and a second end 422 that are arranged opposite each other along the length direction X. A plurality of heat dissipation valves 43 are spaced apart on the piston rod 42 along the length direction, and the plurality of heat dissipation valves 43 correspond one-to-one with a plurality of heat dissipation holes 11.

[0059] like Figure 5 As shown, the first cylinder 41 is fitted onto the first end 421 of the piston rod 42 and is interference-fitted with the first end 421 to divide the internal space of the first cylinder 41 into a first section 411 for containing liquid and a second section 412 for containing piston rod 42. It can be understood that when the backlight module 100 is in working state, the first section 411 and the second section 412 of the first cylinder 41 are dynamically changing; when the light guide plate 2 is heated and expands, causing deformation, the liquid pushes the first end 421, causing the volume of the first section 411 to gradually increase and the volume of the second section 412 to gradually decrease.

[0060] Specifically, the first cylinder 41 includes a liquid inlet 401 and a vent 402 disposed on both sides of the first cylinder 41 along the length direction X. The liquid inlet 401 is disposed at the end of the first cylinder 41 away from the piston rod 42 and is sleeved with the first liquid outlet 31. The first cylinder 41 is connected to the liquid storage bag 3 through the liquid inlet 401. Liquid can enter the first section 411 of the first cylinder 41 through the liquid inlet 401 under the compression of the liquid storage bag 3, and apply pressure to the first end 421 of the piston rod 42, thereby pushing the piston rod 42 to slide along the length direction X away from the liquid inlet 401.

[0061] An exhaust port 402 is located at one end of the first cylinder 41 near the piston rod 42. The first cylinder 41 is connected to the receiving cavity 10 through the exhaust port 402, allowing air to flow freely between the second end of the first cylinder 41 and the receiving cavity 10. This ensures that the air pressure in the second section 412 is consistent with the air pressure in the receiving cavity 10, guaranteeing that the piston rod 42 can be pushed. Specifically, the exhaust port 402 connects the second section 412 and the second receiving cavity 102.

[0062] The first end portion 421 is configured to slide back and forth between the inlet 401 and the outlet 402 along its length X under the action of an external force. It should be noted that the ability of the first end portion 421 to slide back and forth between the inlet 401 and the outlet 402 means that the first end portion 421 can only slide between the inlet 401 and the outlet 402; that is, the first end portion 421 will not slide to the corresponding parts of the inlet 401 and the outlet 402, in order to avoid disrupting the interference fit between the first cylinder block 41 and the first end portion 421 and causing liquid leakage.

[0063] See Figure 6 The liquid storage bag 3 also has a second liquid outlet 32; correspondingly, the piston assembly 4 may also include a second cylinder 45 communicating with the second liquid outlet 32. The second cylinder 45 is fitted onto the second end 422 of the piston rod 42 away from the first end 421, and is press-fitted with the second end 422 to divide the internal space of the second cylinder 45 into a third section 451 for containing liquid and the piston rod 42, and a fourth section 452 for containing gas. Specifically, the third section 451 is located at the end of the second cylinder 45 closer to the piston rod 42, and the fourth section 452 is located at the end of the second cylinder 45 away from the piston rod 42.

[0064] The inlet 401 of the second cylinder 45 is located at one end of the second cylinder 45 near the piston rod 42, and the inlet 401 of the second cylinder 45 is sleeved with the second outlet 32. The second cylinder 45 is connected to the storage bag 3 through the inlet 401. The liquid can enter the third section 451 of the second cylinder 45 through the inlet 401 under the compression of the storage bag 3, and apply pressure to the second end 422 of the piston rod 42, thereby pushing the piston rod 42 to slide away from the inlet 401 along the length direction X.

[0065] The exhaust port 402 of the second cylinder 45 is located at the end of the second cylinder 45 away from the piston rod 42. The second cylinder 45 is connected to the second receiving cavity 102 through the exhaust port 402, so that air can flow freely between the fourth end of the second cylinder 45 and the second receiving cavity 102 through the exhaust port 402, so that the air pressure of the fourth section 452 is consistent with the air pressure of the second receiving cavity 102, so as to ensure that the piston rod 42 can be pushed.

[0066] See Figure 7b The back plate 1 may also include a limiting part 12; the limiting part 12 is disposed on the side wall of the back plate 1 having heat dissipation holes 11, and is located in the middle region of the side wall along the length direction X. The limiting part 12 is provided with a through hole 120, which extends along the length direction X of the piston rod 42 and penetrates the limiting part 12; the limiting part 12 is sleeved on the circumferential periphery of the piston rod 42 through the through hole 120; wherein, the diameter of the through hole 120 is larger than the diameter of the piston rod 42, so that the through hole 120 and the piston rod 42 are spaced apart, so as to avoid friction between the piston rod 42 and the limiting part 12, which would affect the sliding of the piston rod 42.

[0067] like Figure 7a As shown, the piston assembly 4 may further include a spring 44; the spring 44 is sleeved around the circumferential periphery of the piston rod 42; and the inner diameter of the spring 44 is larger than the diameter of the piston rod 42 to avoid friction between the spring 44 and the piston rod 42, which would affect the sliding of the piston rod 42. Specifically, along the length direction X, one end of the spring 44 is fixedly connected to the piston rod 42, and the other end abuts against the limiting part 12; wherein, the piston rod 42 is configured to deform by squeezing the spring 44 during the opening of the heat dissipation valve 43, so that the spring 44 provides a restoring force to the piston rod 42. Specifically, the spring 44 can be fixedly connected to the piston rod 42 by a fixing plate on the piston rod 42. When the piston rod 42 is pushed by the liquid in the liquid storage bag 3, the spring 44 can be compressed under the squeezing of the fixing plate and the limiting part 12, so that part of the kinetic energy of the piston rod 42 is converted into the internal energy of the spring 44, which serves as the power to close the heat dissipation valve 43.

[0068] Specifically, in combination Figure 6 and Figure 7a In response to the light guide plate 2 recovering its deformation, the piston rod 42, pushed by the reset force of the spring 44, closes the heat dissipation valve 43 to cover the heat dissipation hole 11 and pushes the liquid in the first cylinder 41 back into the storage bag 3. It can be understood that after the temperature of the light guide plate 2 decreases, the light guide plate 2 is compressed by the cold and recovers its deformation, resulting in a decrease in pressure within the storage bag 3. This reduces the thrust of the liquid on the piston rod 42, and the reset force of the spring 44 on the piston rod 42 is greater than the thrust of the liquid on the piston rod 42, thereby pushing the piston rod 42 to slide along the length direction X towards the liquid inlet 401. This closes the heat dissipation valve 43 and covers the heat dissipation hole 11, preventing external moisture from entering the backlight module 100 and corroding its internal structural components when the backlight module 100 stops working.

[0069] Combination Figure 5 , Figure 6 and Figure 7aThe maximum deformation of the spring 44 along the length direction X is less than or equal to the distance a between the inlet 401 and the outlet 402 along the length direction X, so as to ensure that the first end 421 or the second end 422 can only slide between the inlet 401 and the outlet 402, thus avoiding liquid leakage.

[0070] In a specific embodiment, the backlight module 100 may also include structural components such as an emitting sheet (not shown), a light-emitting diode (not shown), a diffuser plate (not shown), and an optical film (not shown); the specific structure and function of these structural components are the same as or similar to the structure and function of related structural components in the prior art, and can be referred to the prior art for details, which will not be repeated here.

[0071] This application provides a backlight module 100, which may include a back plate 1, a light guide plate 2, a liquid storage bag 3, and a piston assembly 4. The back plate 1 has a receiving cavity 10 and multiple heat dissipation holes 11 for connecting the receiving cavity 10 to the outside air. The light guide plate 2 is disposed within the receiving cavity 10, and is spaced apart from at least a portion of the sidewall of the back plate 1 to form a mounting groove 30. The liquid storage bag 3 is disposed within the mounting groove 30, with one side abutting against the light guide plate 2 and the other side abutting against the sidewall of the back plate 1; the liquid storage bag 3 stores liquid and has a first liquid outlet 31. The piston assembly 4 includes a first cylinder 41 and a piston rod 42; one end of the first cylinder 41 communicates with the liquid storage bag 3 through the first liquid outlet 31, and the other end is sleeved on the piston rod 42; the piston rod 42 is provided with multiple heat dissipation valves 43 corresponding to the multiple heat dissipation holes 11. In this design, the piston assembly 4 deforms in response to the light guide plate 2, squeezing the liquid storage bag 3. This causes the liquid in the storage bag 3 to enter the first cylinder 41 and push the piston rod 42, thereby opening the heat dissipation valve 43 and exposing the heat dissipation hole 11. By placing the liquid storage bag 3 between the light guide plate 2 and the back plate 1, and connecting the outlet of the liquid storage bag 3 to the piston assembly 4, a hydraulic piston structure is formed. This converts the deformation of the light guide plate 2 caused by thermal expansion into the power to push the piston rod 42, opening the heat dissipation valve 43. This allows the air carrying heat inside the backlight module 100 to be discharged to the outside through the heat dissipation hole 11, achieving heat exchange between the inside of the backlight module 100 and the outside environment. This prevents the backlight module 100 from overheating, effectively reducing the risk of image abnormalities on the display panel and improving its service life.

[0072] like Figure 8 As shown, Figure 8This is a schematic diagram of the structure of a display panel provided in one embodiment of this application. This application also provides a display panel that may include a backlight module 100 and a liquid crystal module 200. The backlight module 100 can be any of the backlight modules 100 described in the above embodiments. The liquid crystal module 200 is disposed on the light-emitting side of the backlight module 100, and includes a liquid crystal molecule layer for controlling the polarization state of the light emitted by the backlight module 100, thereby changing the intensity of the transmitted light to form an image. This display panel can effectively reduce the risk of image abnormalities and improve the lifespan of the display panel.

[0073] 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.

[0074] 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: The back plate has a receiving cavity; the back plate is provided with a plurality of heat dissipation holes, which are used to connect the receiving cavity with the outside air; A light guide plate is disposed within the receiving cavity, and the light guide plate is at least spaced from a portion of the sidewall of the back plate and surrounds it to form a mounting groove; A liquid storage bag is disposed in the mounting groove, with one side of the liquid storage bag abutting against the light guide plate and the other side abutting against the side wall of the back plate; the liquid storage bag stores liquid and has a first liquid outlet; The piston assembly includes a first cylinder and a piston rod; one end of the first cylinder is connected to the liquid storage bag through the first liquid outlet, and the other end is sleeved on the piston rod; the piston rod is provided with a plurality of heat dissipation valves corresponding to the plurality of heat dissipation holes; The piston assembly responds to the deformation of the light guide plate and squeezes the liquid storage bag, causing the liquid in the storage bag to enter the first cylinder and push the piston rod to open the heat dissipation valve and expose the heat dissipation hole.

2. The backlight module according to claim 1, characterized in that, The back plate also includes: A limiting part; the limiting part is provided with a through hole that extends through the limiting part along the length direction of the piston rod, and the limiting part is sleeved on the circumferential periphery of the piston rod through the through hole; The piston assembly also includes: A spring is sleeved around the circumference of the piston rod; and along the length direction, one end of the spring is fixedly connected to the piston rod, and the other end abuts against the limiting part; The piston rod is configured to deform the spring during the opening of the heat dissipation valve, so that the spring provides a restoring force to the piston rod.

3. The backlight module according to claim 2, characterized in that, The piston assembly also responds to the light guide plate restoring its deformation, the piston rod closing the heat dissipation valve to cover the heat dissipation hole under the push of the spring's reset force, and pushing the liquid in the first cylinder back into the reservoir bag.

4. The backlight module according to claim 2, characterized in that, The first cylinder body is sleeved on the first end of the piston rod and is interference-fitted with the first end; the first cylinder body includes: The liquid inlet is located at the end of the first cylinder body away from the piston rod and is sleeved with the first liquid outlet; the first cylinder body is connected to the liquid storage bag through the liquid inlet. An exhaust port is located at one end of the first cylinder body near the piston rod; the first cylinder body communicates with the receiving cavity through the exhaust port. The first end is configured to slide back and forth between the liquid inlet and the exhaust port along the length of the piston rod under the action of an external force.

5. The backlight module according to claim 4, characterized in that, The maximum deformation of the spring along the length direction is less than or equal to the distance between the inlet and the outlet along the length direction.

6. The backlight module according to claim 4, characterized in that, The liquid storage bag also has a second liquid outlet; the piston assembly further includes a second cylinder body communicating with the second liquid outlet; wherein the second cylinder body is sleeved on the second end of the piston rod away from the first end and is interference-fitted with the second end; The liquid inlet of the second cylinder is located at one end of the second cylinder near the piston rod, and the vent of the second cylinder is located at one end of the second cylinder away from the piston rod.

7. The backlight module according to claim 1, characterized in that, The mounting groove is annular; the liquid storage bag is annular and is arranged around the circumferential periphery of the light guide plate.

8. The backlight module according to claim 1, characterized in that, The back plate also includes a limiting plate; the limiting plate divides the receiving cavity into a first receiving cavity and a second receiving cavity; The light guide plate and the liquid storage bag are disposed in the first receiving cavity; the piston assembly is disposed in the second receiving cavity.

9. The backlight module according to claim 8, characterized in that, The limiting plate is provided with multiple heat dissipation vents; the first receiving cavity is connected to the second receiving cavity through the heat dissipation vents.

10. A display panel, characterized in that, include: Backlight module; The backlight module is the backlight module as described in any one of claims 1-9; A liquid crystal module is disposed on the light-emitting side of the backlight module.

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