Display device

Abstract

The present disclosure relates to the field of display, and discloses a display device, comprising a display module, a temperature regulator and a temperature control circuit; the temperature regulator is located at least one side of the display module; the temperature control circuit is electrically connected with the temperature regulator, and the temperature control circuit comprises a controller, a power supply and four actuators; the control ends of the four actuators are electrically connected with the controller; the first end of the first actuator and the first end of the second actuator are electrically connected with the positive electrode of the temperature regulator; the second end of the first actuator and the second end of the fourth actuator are electrically connected with the positive electrode of the power supply; the second end of the second actuator and the second end of the third actuator are electrically connected with the negative electrode of the power supply; the first end of the third actuator and the first end of the fourth actuator are electrically connected with the negative electrode of the temperature regulator; the controller controls the first actuator and the third actuator to be turned on at the same time, and the second actuator and the fourth actuator to be turned off at the same time; or controls the first actuator and the third actuator to be turned off at the same time, and the second actuator and the fourth actuator to be turned on at the same time.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and more specifically, to a display device. Background Technology

[0002] Liquid crystal displays (LCDs) offer advantages such as high resolution, low cost, low power consumption, and low radiation, making them suitable for applications in automotive electronics, aerospace, and medical equipment. However, as the applications of LCDs become increasingly widespread, the working environments they face are also becoming more demanding.

[0003] However, liquid crystal materials have a limited operating temperature range; outside this range, liquid crystal displays cannot function properly. At low temperatures (below the minimum operating temperature range of the liquid crystal material), the viscosity of conventional liquid crystal materials increases dramatically, resulting in slower response times and severe image retention. At high temperatures (above the maximum operating temperature range of the liquid crystal material), the viscosity of conventional liquid crystal materials decreases, leading to reduced contrast and washed-out images. Furthermore, high temperatures increase the risk of damage to components such as the LED strips and circuit boards in the display module, thus reducing product lifespan.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a display device with an integrated temperature control circuit.

[0006] According to one aspect of this disclosure, a display device is provided, comprising: Display module; A temperature regulator, located on at least one side of the display module, is used to regulate the temperature of the display module. The temperature regulator includes a positive electrode and a negative electrode arranged opposite to each other. A temperature control circuit, electrically connected to the temperature regulator, is used to control the temperature regulator. The temperature control circuit includes a controller, a power supply, a first actuator, a second actuator, a third actuator, and a fourth actuator. Wherein, the control terminal of the first actuator is electrically connected to the controller, the first terminal of the first actuator is electrically connected to the positive terminal of the temperature regulator, and the second terminal of the first actuator is electrically connected to the positive terminal of the power supply; the control terminal of the second actuator is electrically connected to the controller, the first terminal of the second actuator is electrically connected to the positive terminal of the temperature regulator, and the second terminal of the second actuator is electrically connected to the negative terminal of the power supply; the control terminal of the third actuator is electrically connected to the controller, the first terminal of the third actuator is electrically connected to the negative terminal of the temperature regulator, and the second terminal of the third actuator is electrically connected to the negative terminal of the power supply; the control terminal of the fourth actuator is electrically connected to the controller, the first terminal of the fourth actuator is electrically connected to the negative terminal of the temperature regulator, and the second terminal of the fourth actuator is electrically connected to the positive terminal of the power supply; the controller controls the first actuator and the third actuator to be simultaneously turned on, and controls the second actuator and the fourth actuator to be simultaneously turned off; or, the controller controls the first actuator and the third actuator to be simultaneously turned off, and controls the second actuator and the fourth actuator to be simultaneously turned on.

[0007] In one exemplary embodiment of this disclosure, the display module has a display surface and a non-display surface disposed opposite to each other; the temperature regulator includes: The first semiconductor cooling chip is attached to the non-display surface of the display module.

[0008] In one exemplary embodiment of this disclosure, the display module includes a liquid crystal display panel and a backlight module, the backlight module including a light guide plate and a light strip, the light strip being disposed on the side of the light guide plate; the temperature regulator further includes: The second semiconductor cooling chip is disposed on the side of the lamp strip away from the light guide plate.

[0009] In one exemplary embodiment of this disclosure, the display device further includes: A temperature sensor is used to detect the temperature of the display module.

[0010] In one exemplary embodiment of this disclosure, the display module further includes a mid-frame surrounding the outer periphery of the liquid crystal display panel; the temperature sensor includes: A first temperature sensor is located on the side of the middle frame near the liquid crystal layer of the liquid crystal display panel. The first temperature sensor is used to detect the temperature around the liquid crystal layer of the liquid crystal display panel. The output terminal of the first temperature sensor is electrically connected to the input terminal of the controller. The controller is used to control the first actuator, the second actuator, the third actuator, and the fourth actuator according to the temperature detected by the first temperature sensor.

[0011] In one exemplary embodiment of this disclosure, the temperature sensor further includes: A second temperature sensor is disposed adjacent to the light strip. The second temperature sensor is used to detect the temperature of the light strip. The output terminal of the second temperature sensor is electrically connected to the input terminal of the controller.

[0012] In one exemplary embodiment of this disclosure, the first actuator, the second actuator, the third actuator, and the fourth actuator are electrically connected to the first thermoelectric cooler; the temperature control circuit further includes a fifth actuator; The control terminal of the fifth actuator is electrically connected to the controller, the first terminal of the fifth actuator is electrically connected to the positive terminal of the second thermoelectric cooler, the second terminal of the fifth actuator is electrically connected to the positive terminal of the power supply, and the negative terminal of the second thermoelectric cooler is electrically connected to the negative terminal of the power supply. The controller is used to control the fifth actuator to turn on or off according to the temperature detected by the second temperature sensor.

[0013] In one exemplary embodiment of this disclosure, the display device further includes: The first heat dissipation fin is located on the side of the first semiconductor cooling chip away from the display module; The second heat dissipation fin is located on the side of the second semiconductor cooling chip that is away from the display module.

[0014] In one exemplary embodiment of this disclosure, the backlight module further includes a back plate disposed on the side of the light guide plate away from the liquid crystal display panel. The back plate is frame-shaped, the first semiconductor cooling chip is located within the frame of the back plate, and the first heat dissipation fins are also located on the side of the back plate away from the backlight module.

[0015] In one exemplary embodiment of this disclosure, the display module further includes: A heat insulation pad includes a first heat insulation portion and a second heat insulation portion connected to each other. The first heat insulation portion is disposed between the back plate and the first semiconductor cooling chip, and the second heat insulation portion is located at least between the back plate and the first heat dissipation fin.

[0016] In one exemplary embodiment of this disclosure, the first heat insulation portion is configured as an annular shape, and the first heat insulation portion is interference-fitted between the first semiconductor cooling chip and the back plate.

[0017] In one exemplary embodiment of this disclosure, the display device further includes: A first thermally conductive connection layer is bonded between the first semiconductor cooling chip and the display module; The second thermally conductive bonding layer is bonded between the second semiconductor cooling chip and the display module.

[0018] In one exemplary embodiment of this disclosure, the first actuator is a transistor or an electromagnetic switch, the second actuator is a transistor or an electromagnetic switch, the third actuator is a transistor or an electromagnetic switch, the fourth actuator is a transistor or an electromagnetic switch, and the fifth actuator is a transistor or an electromagnetic switch.

[0019] The display device disclosed herein allows for the following: when the controller simultaneously activates the first and third actuators and simultaneously deactivates the second and fourth actuators, the temperature regulator can cool the display module; when the controller simultaneously deactivates the first and third actuators and simultaneously activates the second and fourth actuators, the temperature regulator can heat the display module. This achieves temperature control within the display device, enabling the display module to operate at both higher and lower ambient temperatures, avoiding defects such as severe image retention, reduced contrast, and washed-out images. Furthermore, it minimizes the risk of damage to components such as LED strips and circuit boards in high-temperature environments, thereby extending the lifespan of the display device. Additionally, it improves the operational stability of the display device under different temperature conditions.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0022] Figure 1 A schematic perspective view of the combined display device of this disclosure is shown.

[0023] Figure 2 An exploded perspective view of the display device of this disclosure is shown schematically.

[0024] Figure 3 Schematic illustration of according to Figure 1 A sectional view cut along line A-A'.

[0025] Figure 4 Schematic illustration Figure 3 Enlarged view of region B in the middle.

[0026] Figure 5 Schematic illustration Figure 3 Enlarged view of region C.

[0027] Figure 6The schematic diagram illustrates the working principle of the temperature control circuit corresponding to the Peltier thermostat.

[0028] Figure 7 The diagram schematically illustrates the equivalent circuit of the temperature control circuit when the current temperature is higher than the set temperature.

[0029] Figure 8 The diagram schematically illustrates the equivalent circuit of the temperature control circuit when the current temperature is lower than the set temperature.

[0030] Figure 9 The schematic diagram illustrates the working principle of the temperature control circuit when the first and second thermoelectric coolers share the controller and power supply.

[0031] Explanation of reference numerals in the attached figures: 1. Display module; 101. LCD display panel; 102. Backlight module; 2. Temperature regulator; 2a. First thermoelectric cooler; 2b. Second thermoelectric cooler; 3. Heat sink fins; 3a. First heat sink fins; 3b. Second heat sink fins; 4. Heat insulation pad; 4a. First heat insulation part; 4b. Second heat insulation part; 5. Back plate; 51. Main body; 52. Extension part; 6. Reflective film; 7. Light guide plate; 8. Diffuser film; 9. Prism; 10. Dual brightness enhancement film; 11. Middle frame; 11a. Outer frame; 11b. Support frame; 12. Lower polarizer; 13. TFT substrate (Thin Film Transistor substrate); 14. Liquid crystal layer; 15. CF substrate (Color Filter substrate); 16. Upper polarizer; 17. LED strip; 18. First temperature sensor; 19. Second temperature sensor; 20. Foam; 21. First thermally conductive connection layer; 22. Second thermally conductive connection layer; 23. Temperature control circuit; 231. Controller; 232. Power supply; 233. First actuator; 234. Second actuator; 235. Third actuator; 236. Fourth actuator; 237. Fifth actuator; 24. Temperature sensor. Detailed Implementation

[0032] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0033] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0034] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0035] In this application, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Furthermore, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0036] In related technologies, liquid crystal display (LCD) devices generally employ a single method of controlling either the maximum or minimum temperature to address malfunctions that occur when operating in excessively high or low ambient temperatures. For example, heating plates or heating films are used to raise the internal temperature of the LCD device, solving the technical problem of excessively low liquid crystal material temperatures. Air cooling or water cooling methods are also used to rapidly dissipate heat from the outer surface of the LCD module into the surrounding environment, thereby reducing the temperature of the liquid crystal and its components.

[0037] This disclosure provides a display device, with reference to... Figures 1-9As shown, the display device may include a display module 1, a temperature regulator 2, and a temperature control circuit 23. The temperature regulator 2 is located on at least one side of the display module 1 and is used to regulate the temperature of the display module 1. The temperature regulator 2 may include a positive terminal and a negative terminal arranged opposite to each other. The temperature control circuit 23 is electrically connected to the temperature regulator 2 and is used to control the temperature regulator. The temperature control circuit 23 may include a controller 231, a power supply 232, a first actuator 233, a second actuator 234, a third actuator 235, and a fourth actuator 236.

[0038] The control terminal of the first actuator 233 is electrically connected to the controller 231, the first terminal of the first actuator 233 is electrically connected to the positive terminal of the temperature regulator 2, and the second terminal of the first actuator 233 is electrically connected to the positive terminal of the power supply 232; the control terminal of the second actuator 234 is electrically connected to the controller 231, the first terminal of the second actuator 234 is electrically connected to the positive terminal of the temperature regulator 2, and the second terminal of the second actuator 234 is electrically connected to the negative terminal of the power supply 232; the control terminal of the third actuator 235 is electrically connected to the controller 231, the first terminal of the third actuator 235 is electrically connected to the negative terminal of the temperature regulator 2, and the second terminal of the third actuator 235 is electrically connected to the negative terminal of the power supply 232; the control terminal of the fourth actuator 236 is electrically connected to the controller 231, the first terminal of the fourth actuator 236 is electrically connected to the negative terminal of the temperature regulator 2, and the second terminal of the fourth actuator 236 is electrically connected to the positive terminal of the power supply 232.

[0039] In the first scenario, the controller 231 can control the first actuator 233 and the third actuator 235 to be turned on simultaneously, and control the second actuator 234 and the fourth actuator 236 to be turned off simultaneously, so that the temperature regulator 2 can cool down the display module 1.

[0040] In the second scenario, the controller 231 can control the first actuator 233 and the third actuator 235 to disconnect simultaneously, and control the second actuator 234 and the fourth actuator 236 to connect simultaneously, so that the temperature regulator 2 can heat the display module 1.

[0041] This allows for temperature control within the display device, enabling display module 1 to operate in both higher and lower ambient temperatures, preventing issues such as severe image retention, reduced contrast, and washed-out images. Furthermore, it minimizes the risk of damage to components like the LED strip 17 and circuit boards in high-temperature environments, thus extending the lifespan of the display device. It also improves the operational stability of the display device under varying temperature conditions. Compared to related technologies that utilize a single component—a temperature regulator and temperature control circuit—to manage both high and low temperatures, this approach offers lower cost and a simpler structure.

[0042] Reference Figures 1-5As shown, the display module 1 may include a backlight module 102, a liquid crystal display panel 101, and a mid-frame 11; the backlight module 102 may include a back plate 5, a reflective film 6, a light guide plate 7, a diffuser film 8, a prism 9, a dual brightness enhancement film 10, and a lamp bar 17; the liquid crystal display panel 101 may include a lower polarizer 12, a TFT substrate 13, a liquid crystal layer 14, a CF substrate 15, and an upper polarizer 16 stacked together.

[0043] Specifically, a reflective film 6 is provided on one side of the back plate 5, and a light guide plate 7 is provided on the side of the reflective film 6 away from the back plate 5; a diffusion film 8 is provided on the side of the light guide plate 7 away from the back plate 5, a prism 9 is provided on the side of the diffusion film 8 away from the back plate 5, a dual brightness enhancement film 10 is provided on the side of the prism 9 away from the back plate 5, a lower polarizer 12 is provided on the side of the dual brightness enhancement film 10 away from the back plate 5, a TFT substrate 13 is provided on the side of the lower polarizer 12 away from the back plate 5, a liquid crystal layer 14 is provided on the side of the TFT substrate 13 away from the back plate 5, a CF substrate 15 is provided on the side of the liquid crystal layer 14 away from the back plate 5, and an upper polarizer 16 is provided on the side of the CF substrate 15 away from the back plate 5.

[0044] The display module 1 can have a display surface and a non-display surface that are arranged opposite to each other. For example, the side of the upper polarizer 16 that faces away from the CF substrate 15 can be the display surface. The side of the reflective film 6 that faces away from the light guide plate 7 can be the non-display surface.

[0045] The middle frame 11 surrounds the outer periphery of the liquid crystal display panel 101. Specifically, the middle frame 11 may include an outer frame 11a and a support frame 11b. The outer frame 11a surrounds the backlight module 102 and the outer periphery of the liquid crystal display panel 101. The support frame 11b is connected to the side of the outer frame 11a that is close to the backlight module 102 and the liquid crystal display panel 101. The support frame 11b is located on the side of the lower polarizer 12 that is away from the TFT substrate 13 and is only arranged around the edge of the TFT substrate 13. The center of the support frame 11b is light-transmitting, so that the light emitted through the dual brightness enhancement film 10 can reach the lower polarizer 12.

[0046] The back plate 5 is frame-shaped and may include a main body 51 and an extension 52 connected to each other, such that both the main body 51 and the extension 52 are frame-shaped. The main body 51 is located on the side of the reflective film 6 away from the light guide plate 7, and the extension 52 is connected to the outer ring surface of the main body 51 and surrounds the outer periphery of the light guide plate 7. The outer frame 11a of the middle frame 11 is located on the side of the extension 52 away from the display module 1.

[0047] The light strip 17 is disposed on the side of the light guide plate 7, and the structure is a side-lit backlight module 102. Specifically, the light strip 17 is disposed on one side of the side of the light guide plate 7, so that the light emitted by the light strip 17 enters the light guide plate 7 through the side of the light guide plate 7, undergoes total internal reflection in the light guide plate 7, and is emitted through the side of the light guide plate 7 near the diffuser film 8.

[0048] Of course, the structure of the display module 1 is not limited to the above description. That is, the liquid crystal display panel 101 may include more or fewer film layers, which will not be described in detail here. The backlight module 102 may also include more or fewer film layers, which will not be described in detail here. The lamp strip 17 may be disposed on the side of the light guide plate 7 away from the diffusion film 8. This structure is a direct-lit backlight module 102.

[0049] Reference Figure 6 As shown, the temperature regulator 2 is located on at least one side of the display module 1. For example, the temperature regulator 2 can be located on the non-display surface of the display module 1, or it can be located on both the non-display surface and the side of the display module 1.

[0050] Temperature regulator 2 can be used to regulate the temperature of display module 1. Temperature regulator 2 may include positive and negative electrodes arranged opposite each other. For example, temperature regulator 2 may be a thermoelectric cooler (Peltier thermoelectric cooler), which has positive and negative electrodes arranged opposite each other. When the positive and negative electrodes of the thermoelectric cooler are connected to the power supply 232 with DC power (positive to positive, negative to negative), based on the Peltier thermoelectric effect, charge carriers migrate directionally between the semiconductor and metal junction, causing one end face of the thermoelectric cooler to continuously absorb heat (cold side) and the other end face to continuously release heat (hot side). Conversely, when the positive and negative electrodes of the thermoelectric cooler are reversed with the power supply 232 (positive to negative, negative to positive), the cold and hot sides can be quickly interchanged, thereby realizing the switching between cooling and heating modes.

[0051] The cold side of the semiconductor cooling chip in the positive polarity state is bonded to the display module 1.

[0052] Reference Figure 6 , Figure 7 and Figure 8As shown, the temperature control circuit 23 may include a controller 231, a power supply 232, a first actuator 233, a second actuator 234, a third actuator 235, and a fourth actuator 236. Each of the first actuator 233, second actuator 234, third actuator 235, and fourth actuator 236 includes a control terminal, a first terminal, and a second terminal. Each of the first actuator 233, second actuator 234, third actuator 235, and fourth actuator 236 can be a transistor; for example, each of the first actuator 233, second actuator 234, third actuator 235, and fourth actuator 236 may be a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor). The control terminal can be the gate, the first terminal can be the source, and the second terminal can be the drain; the first actuator 233 can be MOSFET1, the second actuator 234 can be MOSFET2, the third actuator 235 can be MOSFET3, and the fourth actuator 236 can be MOSFET4.

[0053] The control terminal of the first actuator 233 is electrically connected to the controller 231. The first terminal of the first actuator 233 is electrically connected to the positive terminal of the temperature regulator 2, and the second terminal of the first actuator 233 is electrically connected to the positive terminal of the power supply 232. The control terminal of the second actuator 234 is electrically connected to the controller 231. The first terminal of the second actuator 234 is electrically connected to the positive terminal of the temperature regulator 2, and the second terminal of the second actuator 234 is electrically connected to the negative terminal of the power supply 232. The control terminal of the third actuator 235 is electrically connected to the controller 231. The first terminal of the third actuator 235 is electrically connected to the negative terminal of the temperature regulator 2, and the second terminal of the third actuator 235 is electrically connected to the negative terminal of the power supply 232. The control terminal of the fourth actuator 236 is electrically connected to the controller 231. The first terminal of the fourth actuator 236 is electrically connected to the negative terminal of the temperature regulator 2, and the second terminal of the fourth actuator 236 is electrically connected to the positive terminal of the power supply 232. Figure 6 The lines indicating the correct connection between the temperature regulator 2 and the power supply 232 are marked with bold lines, while the lines indicating the reverse connection between the temperature regulator 2 and the power supply 232 are marked with thin lines.

[0054] When the temperature is high (e.g., in summer, the operator can directly select the summer mode), the controller 231 controls the first actuator 233 and the third actuator 235 to be turned on simultaneously, and controls the second actuator 234 and the fourth actuator 236 to be turned off simultaneously. The positive terminal of the power supply 232 is electrically connected to the positive terminal of the temperature regulator 2, and the negative terminal of the power supply 232 is electrically connected to the negative terminal of the temperature regulator 2. The temperature regulator 2 cools down the display module 1. When the temperature is low (e.g., in winter, the operator can directly select the winter mode), the controller 231 controls the first actuator 233 and the third actuator 235 to disconnect simultaneously, and controls the second actuator 234 and the fourth actuator 236 to connect simultaneously. The positive terminal of the power supply 232 is connected to the negative terminal of the temperature regulator 2, and the negative terminal of the power supply 232 is connected to the positive terminal of the temperature regulator 2. The temperature regulator 2 heats the display module 1, thereby controlling the internal temperature of the display device. This allows the display module 1 to operate in both higher and lower ambient temperatures, avoiding severe image retention, decreased contrast, and image whitening. Furthermore, it minimizes the risk of damage to components such as the LED strip 17 and circuit boards in high-temperature environments, thus extending the lifespan of the display device. It also improves the operational stability of the display device under different temperature conditions.

[0055] It should be noted that the first actuator 233, the second actuator 234, the third actuator 235, and the fourth actuator 236 can all be turned on at a high level, or all be turned on at a low level, or some can be turned on at a high level and others at a low level. The control signal output by the controller 231 is determined according to the turn-on requirements of the first actuator 233, the second actuator 234, the third actuator 235, and the fourth actuator 236.

[0056] In some exemplary embodiments of this disclosure, reference is made to Figure 2 , Figure 3 and Figure 5 As shown, the display module 1 can have a display surface and a non-display surface arranged opposite to each other. The temperature regulator 2 can include a first thermoelectric cooler 2a, which is attached to the non-display surface of the display module 1. The cold side of the first thermoelectric cooler 2a in the positive polarity state is attached to the non-display surface of the display module 1. Since the non-display surface of the display module 1 has a large area, a larger first thermoelectric cooler 2a can be provided, which can achieve a better heating or cooling effect. Moreover, in the case of a direct-lit backlight module 102, the first thermoelectric cooler 2a can also cool the lamp strip 17, which generates more heat. The first thermoelectric cooler 2a can also cool the circuit board, which generates more heat, reducing the risk of damage to components such as the lamp strip 17 and the circuit board, thereby improving the service life of the display device.

[0057] Specifically, the first semiconductor cooling chip 2a can be attached to the side of the reflective film 6 facing away from the light guide plate 7. The electrical connection structure of the first semiconductor cooling chip 2a is the same as that of the temperature regulator 2 described above, and will not be repeated here.

[0058] In some exemplary embodiments of this disclosure, reference is made to Figure 2 , Figure 3 and Figure 5 As shown, the temperature regulator 2 may further include a second thermoelectric cooler 2b, which is disposed on the side of the lamp strip 17 away from the light guide plate 7. Specifically, the second thermoelectric cooler 2b may be disposed on the side of the middle frame 11 away from the light guide plate 7. The cold surface of the second thermoelectric cooler 2b in the positive connection state is in contact with the side of the middle frame 11 away from the light guide plate 7. The second thermoelectric cooler 2b may be arranged in parallel with the first thermoelectric cooler 2a, so that the electrical connection structure of the second thermoelectric cooler 2b is the same as the electrical connection structure of the temperature regulator 2 described above, which will not be repeated here. In this case, the first thermoelectric cooler 2a and the second thermoelectric cooler 2b simultaneously cool or heat. In the case of the side-lit backlight module 102, the second thermoelectric cooler 2b can cool the lamp strip 17, which generates more heat, reducing the risk of damage to the lamp strip 17 and improving the service life of the display device.

[0059] In some exemplary embodiments of this disclosure, reference is made to Figure 3 , Figure 4 and Figure 5 As shown, the display device may further include a temperature sensor 24, which is located on at least one side of the display module 1 and is used to detect the temperature of the display module 1.

[0060] Specifically, refer to Figure 3 and Figure 4 As shown, the temperature sensor may include a first temperature sensor 18, which is located on the side of the middle frame 11 near the liquid crystal layer 14 of the liquid crystal display panel 101, i.e., the first temperature sensor 18 is positioned close to the liquid crystal layer 14 of the liquid crystal display panel 101. The first temperature sensor 18 is used to detect the temperature around the liquid crystal layer 14. The output terminal of the first temperature sensor 18 is electrically connected to the input terminal of the controller 231. The controller 231 is used to control the first actuator 233, the second actuator 234, the third actuator 235, and the fourth actuator 236 according to the temperature detected by the first temperature sensor 18.

[0061] The temperature around the liquid crystal layer 14 can be accurately detected by the first temperature sensor 18, so that the controller 231 can accurately control the first actuator 233, the second actuator 234, the third actuator 235 and the fourth actuator 236 to accurately heat or cool the display module 1.

[0062] Figure 3 Schematic illustration of according to Figure 1 The sectional view cut along line A-A' will Figure 3 By magnifying area B in the image, you can obtain... Figure 4 .exist Figure 4 The first temperature sensor 18 can be seen on one side of the middle frame 11.

[0063] The first temperature sensor 18 monitors the real-time temperature around the liquid crystal layer 14 and outputs the measured real-time temperature signal to the controller 231.

[0064] The controller 231 stores a preset temperature range and compares the actual temperature monitored by the first temperature sensor 18 with the preset temperature range.

[0065] If the detected temperature exceeds the maximum value of the preset temperature range, the controller 231 outputs a high-level signal to MOSFET1 and MOSFET3, and a low-level signal to MOSFET2 and MOSFET4. MOSFET1 and MOSFET3 are in the on state, while MOSFET2 and MOSFET4 are in the off state. The equivalent circuit diagram is shown below. Figure 7 As shown.

[0066] like Figure 7 As shown, the temperature regulator 2 is positively connected to the power supply 232. At this time, the side that is in contact with the display module 1 is the cold side and begins to absorb the temperature of the display module 1, which achieves the effect of active heat dissipation until the temperature of the display module 1 reaches the set temperature range.

[0067] When the temperature detected by the first temperature sensor 18 is lower than the minimum value of the preset temperature range, the controller 231 outputs a high-level signal to MOSFET2 and MOSFET4, and a low-level signal to MOSFET1 and MOSFET3. MOSFET2 and MOSFET4 are in the on state, while MOSFET1 and MOSFET3 are in the off state. The equivalent circuit diagram is shown below. Figure 8 As shown.

[0068] like Figure 8 As shown, the temperature regulator 2 is reversed with the power supply 232. At this time, the working surface of the display module 1 becomes the hot surface and begins to release heat to the display module 1, which achieves the effect of active heating until the temperature of the display module 1 reaches the set temperature range.

[0069] When the temperature detected by the first temperature sensor 18 is within the preset temperature range, the controller 231 does not output a signal, the temperature regulator 2 is in the off state, and only works as a heat transfer medium, that is, it achieves the effect of passive heat dissipation.

[0070] In some exemplary embodiments of this disclosure, reference is made to Figure 3 and Figure 5 As shown, the temperature sensor 24 may further include a second temperature sensor 19, which is located at the light strip 17, i.e., adjacent to the light strip 17. Specifically, the second temperature sensor 19 may be located at one end of the light strip 17. The second temperature sensor 19 is used to monitor the temperature of the light strip 17. The output terminal of the second temperature sensor 19 is electrically connected to the input terminal of the controller 231.

[0071] The second temperature sensor 19 monitors the real-time temperature at the light strip 17 and sends the monitored temperature signal to the controller 231.

[0072] When the first thermoelectric cooler 2a and the second thermoelectric cooler 2b share the same controller 231 and the same power supply 232, the working principle diagram of the temperature control circuit 23 is as follows: Figure 9 As shown. Among them, Figure 9 The lines marked with bold lines indicate the positive connection between the first semiconductor refrigeration chip 2a and the power supply 232, while the lines marked with thin lines indicate the reverse connection between the first semiconductor refrigeration chip 2a and the power supply 232.

[0073] In this case, the first thermoelectric cooler 2a and the second thermoelectric cooler 2b can be controlled independently. The first actuator 233, the second actuator 234, the third actuator 235, and the fourth actuator 236 are electrically connected to the first thermoelectric cooler 2a.

[0074] Specifically, refer to Figure 9 As shown, the first actuator 233 can be MOSFET1, the second actuator 234 can be MOSFET2, the third actuator 235 can be MOSFET3, and the fourth actuator 236 can be MOSFET4. The control terminal of MOSFET1 is electrically connected to the controller 231, the first terminal of MOSFET1 is electrically connected to the positive terminal of the first thermoelectric cooler 2a, and the second terminal of MOSFET1 is electrically connected to the positive terminal of the power supply 232. The control terminal of MOSFET2 is electrically connected to the controller 231, the first terminal of MOSFET2 is electrically connected to the positive terminal of the first thermoelectric cooler 2a, and the second terminal of MOSFET2 is electrically connected to the negative terminal of the power supply 232. The control terminal of MOSFET3 is electrically connected to the controller 231, the first terminal of MOSFET3 is electrically connected to the negative terminal of the first thermoelectric cooler 2a, and the second terminal of MOSFET3 is electrically connected to the negative terminal of the power supply 232. The control terminal of MOSFET4 is electrically connected to the controller 231, the first terminal of MOSFET4 is electrically connected to the negative terminal of the first thermoelectric cooler 2a, and the second terminal of MOSFET4 is electrically connected to the positive terminal of the power supply 232.

[0075] Reference Figure 9 As shown, the temperature control circuit 23 may further include a fifth actuator 237. The control terminal of the fifth actuator 237 is electrically connected to the controller 231, the first terminal of the fifth actuator 237 is electrically connected to the positive terminal of the second thermoelectric cooler 2b, and the second terminal of the fifth actuator 237 is electrically connected to the positive terminal of the power supply 232; the negative terminal of the second thermoelectric cooler 2b is electrically connected to the negative terminal of the power supply 232; the controller 231 is used to control the fifth actuator 237 to be turned on or off according to the temperature detected by the second temperature sensor 19.

[0076] The fifth actuator 237 can be MOSFET5. The control terminal of MOSFET5 is electrically connected to the controller 231. The first terminal of MOSFET5 is electrically connected to the positive terminal of the second semiconductor cooling chip 2b. The second terminal of MOSFET5 is electrically connected to the positive terminal of the power supply 232.

[0077] When the temperature detected by the second temperature sensor 19 exceeds the maximum value of the preset temperature range, the controller 231 can control the MOSFET 5 to turn on, so that the second thermoelectric cooler 2b is positively connected to the power supply 232, realizing the cooling function. At this time, the second thermoelectric cooler 2b can be used to cool the lamp strip 17. When the temperature detected by the second temperature sensor 19 is within the preset temperature range, the controller 231 can control the MOSFET 5 to turn off, so that the second thermoelectric cooler 2b is disconnected from the power supply 232.

[0078] Of course, in some other exemplary embodiments of this disclosure, the first end of the fifth actuator 237 may be electrically connected to the negative terminal of the second thermoelectric cooler 2b, and the second end of the fifth actuator 237 may be electrically connected to the negative terminal of the power supply 232; the positive terminal of the second thermoelectric cooler 2b may be electrically connected to the positive terminal of the power supply 232.

[0079] Furthermore, if the second thermoelectric cooler 2b needs to be equipped with a heating function, a sixth, seventh, and eighth actuator can also be provided. The electrical connection relationship between the fifth, sixth, seventh, and eighth actuators and the second thermoelectric cooler 2b is the same as the electrical connection relationship between the first, second, third, and fourth actuators 233 and the first thermoelectric cooler 2a, which will not be elaborated here.

[0080] Of course, in other exemplary embodiments of this disclosure, the first actuator 233, the second actuator 234, the third actuator 235, the fourth actuator 236, and the fifth actuator 237 can all be electromagnetic switches. An electromagnetic switch is a switch that is activated by electricity and deactivated by electricity, controlled by electromagnetic attraction. Specifically, an electromagnetic switch may include a permanent magnet, an electromagnetic coil, and a movable armature assembly arranged opposite to each other. When a short-duration DC pulse is applied to the coil in the forward direction, based on the synergistic effect of electromagnetic induction and permanent magnet bias, the magnetic field generated by the coil current is in the same direction as the permanent magnet magnetic field, pushing the armature to switch the contacts to a closed state and maintaining it by the permanent magnet force. When a short-duration DC pulse is applied in the reverse direction, the coil magnetic field is in the opposite direction, canceling out the permanent magnet magnetic field, driving the armature back, and switching the contacts to an open state and maintaining it, thereby achieving rapid switching between two steady states and low power consumption. Of course, the structure of the electromagnetic switch is not limited to the above description.

[0081] In some exemplary embodiments of this disclosure, reference is made to Figures 1-5 As shown, the display device may further include heat dissipation fins 3, which may include a first heat dissipation fin 3a and a second heat dissipation fin 3b. The first heat dissipation fin 3a is located on the side of the first thermoelectric cooler 2a facing away from the display module 1, and the first heat dissipation fin 3a is used to assist the first thermoelectric cooler 2a in dissipating heat, which is beneficial to improving heat dissipation efficiency; the second heat dissipation fin 3b is located on the side of the second thermoelectric cooler 2b facing away from the display module 1, and the second heat dissipation fin 3b is used to assist the second thermoelectric cooler 2b in dissipating heat, which is beneficial to improving heat dissipation efficiency.

[0082] Specifically, the first heat dissipation fin 3a may include a substrate and a plurality of heat dissipation fins connected to the side of the substrate away from the display module 1, and the second heat dissipation fin 3b may include a substrate and a plurality of heat dissipation fins connected to the side of the substrate away from the display module 1.

[0083] In some exemplary embodiments of this disclosure, the backlight module 102 may further include a back plate 5, which is disposed on the side of the light guide plate opposite to the liquid crystal display panel 101. The back plate 5 is frame-shaped, and the first thermoelectric cooler 2a is located within the frame of the back plate 5. The specific structure of the back plate 5 has been described in detail above and will not be repeated here. This arrangement allows the first thermoelectric cooler 2a to be directly bonded to the reflective film 6, which is beneficial for improving heat dissipation or heating effects.

[0084] Specifically, such as Figure 5 As shown, a rectangular through hole is provided at the center of the back plate 5, which can be used to place the first semiconductor cooling chip 2a.

[0085] Alternatively, the first heat dissipation fin 3a is also located on the side of the backplate 5 away from the backlight module 102.

[0086] The display module 1 may also include a heat insulation pad 4, which may include a first heat insulation part 4a and a second heat insulation part 4b connected to each other. The first heat insulation part 4a is disposed between the back plate 5 and the second semiconductor cooling chip 2b, and the second heat insulation part 4b is located at least between the back plate 5 and the second heat dissipation fin 3b.

[0087] Specifically, the first heat insulation part 4a can be configured as an annular shape. The first heat insulation part 4a can be a heat insulation part between the back plate 5 and the first thermoelectric cooler 2a. The first heat insulation part 4a is used to prevent the first thermoelectric cooler 2a from contacting the back plate 5, thereby preventing the heat absorption end and heat release end of the first thermoelectric cooler 2a from conducting heat to each other through the back plate 5. The second heat insulation part 4b can be configured as an annular plate shape. One side of the second heat insulation part 4b is bonded to the first heat dissipation fin 3a, and the other side is bonded to the back plate 5 of the display module 1. The second heat insulation part 4b can be a heat insulation part between the back plate 5 and the first heat dissipation fin 3a, used to prevent the first heat dissipation fin 3a from contacting the back plate 5, thereby preventing the heat of the first heat dissipation fin 3a from flowing back to the back plate 5.

[0088] The first heat insulation part 4a is interference-fitted between the first semiconductor cooling chip 2a and the back plate 5 to fix the heat insulation pad 4.

[0089] In some exemplary embodiments of this disclosure, reference is made to Figure 5 As shown, the display device may further include a first thermally conductive connection layer 21 and a second thermally conductive connection layer 22. The first thermally conductive connection layer 21 is bonded between the first semiconductor cooling chip 2a and the display module 1; the second thermally conductive connection layer 22 is bonded between the second semiconductor cooling chip 2b and the display module 1.

[0090] Specifically, one side of the first thermoelectric cooler 2a is bonded to the reflective film 6 of the display module 1 via a first thermally conductive connection layer 21. The other side of the first thermoelectric cooler 2a is fixedly connected to the first heat sink 3a. The first thermoelectric cooler 2a can be used for overall heating or cooling of the display module 1. The first heat sink 3a absorbs and quickly dissipates heat from the hot end of the first thermoelectric cooler 2a, thereby assisting the first thermoelectric cooler 2a in continuous operation. One side of the second thermoelectric cooler 2b is bonded to the middle frame 11 of the display module 1 via a second thermally conductive connection layer 22. The other side of the second thermoelectric cooler 2b is fixedly connected to the second heat sink 3b. The second heat sink 3b absorbs and quickly dissipates heat from the hot end of the second thermoelectric cooler 2b, thereby assisting the second thermoelectric cooler 2b in continuous operation.

[0091] Both the first thermally conductive connection layer 21 and the second thermally conductive connection layer 22 can be thermally conductive silicone grease. The thermally conductive silicone grease can fill microscopic gaps and eliminate air, thereby significantly reducing contact thermal resistance and ensuring efficient heat transfer.

[0092] In some exemplary embodiments of this disclosure, reference is made to Figure 3 , Figure 4 as well as Figure 5 As shown, foam 20 is provided between the middle frame 11 and the lower polarizer 12. One side of foam 20 is attached to the support frame 11b of the middle frame 11, and the other side of foam 20 is attached to the lower polarizer 12, so that foam 20 can play a supporting and buffering role.

[0093] The features, structures, or characteristics described above can be combined in any suitable manner in one or more embodiments, and the features discussed in the various embodiments are interchangeable where possible. In the above description, numerous specific details are provided to give a full understanding of embodiments of the invention. However, those skilled in the art will recognize that the technical solutions of the invention can be practiced without one or more of the specific details described, or other methods, components, materials, etc., can be employed. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring various aspects of the invention.

[0094] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A display device, characterized by comprising: include: Display module; A temperature regulator, located on at least one side of the display module, is used to regulate the temperature of the display module. The temperature regulator includes a positive electrode and a negative electrode arranged opposite to each other. A temperature control circuit, electrically connected to the temperature regulator, is used to control the temperature regulator. The temperature control circuit includes a controller, a power supply, a first actuator, a second actuator, a third actuator, and a fourth actuator. Wherein, the control terminal of the first actuator is electrically connected to the controller, the first terminal of the first actuator is electrically connected to the positive terminal of the temperature regulator, and the second terminal of the first actuator is electrically connected to the positive terminal of the power supply; the control terminal of the second actuator is electrically connected to the controller, the first terminal of the second actuator is electrically connected to the positive terminal of the temperature regulator, and the second terminal of the second actuator is electrically connected to the negative terminal of the power supply; the control terminal of the third actuator is electrically connected to the controller, the first terminal of the third actuator is electrically connected to the negative terminal of the temperature regulator, and the second terminal of the third actuator is electrically connected to the negative terminal of the power supply; the control terminal of the fourth actuator is electrically connected to the controller, the first terminal of the fourth actuator is electrically connected to the negative terminal of the temperature regulator, and the second terminal of the fourth actuator is electrically connected to the positive terminal of the power supply; the controller controls the first actuator and the third actuator to be simultaneously turned on, and controls the second actuator and the fourth actuator to be simultaneously turned off; or, the controller controls the first actuator and the third actuator to be simultaneously turned off, and controls the second actuator and the fourth actuator to be simultaneously turned on.

2. The display device according to claim 1, wherein The display module has a display surface and a non-display surface arranged opposite to each other; the temperature regulator includes: The first semiconductor cooling chip is attached to the non-display surface of the display module.

3. The display device according to claim 2, wherein The display module includes a liquid crystal display panel and a backlight module. The backlight module includes a light guide plate and a light strip, and the light strip is disposed on the side of the light guide plate. The temperature regulator also includes: The second semiconductor cooling chip is disposed on the side of the lamp strip away from the light guide plate.

4. The display device according to claim 3, wherein The display device further includes: A temperature sensor is used to detect the temperature of the display module.

5. The display device according to claim 4, wherein The display module further includes a mid-frame surrounding the outer periphery of the liquid crystal display panel; the temperature sensor includes: A first temperature sensor is located on the side of the middle frame near the liquid crystal layer of the liquid crystal display panel. The first temperature sensor is used to detect the temperature around the liquid crystal layer of the liquid crystal display panel. The output terminal of the first temperature sensor is electrically connected to the input terminal of the controller. The controller is used to control the first actuator, the second actuator, the third actuator, and the fourth actuator according to the temperature detected by the first temperature sensor.

6. The display device according to claim 5, characterized in that, The temperature sensor also includes: A second temperature sensor is disposed adjacent to the light strip. The second temperature sensor is used to detect the temperature of the light strip. The output terminal of the second temperature sensor is electrically connected to the input terminal of the controller.

7. The display device according to claim 6, characterized in that, The first actuator, the second actuator, the third actuator, and the fourth actuator are electrically connected to the first semiconductor cooling chip; the temperature control circuit further includes a fifth actuator; The control terminal of the fifth actuator is electrically connected to the controller, the first terminal of the fifth actuator is electrically connected to the positive terminal of the second thermoelectric cooler, the second terminal of the fifth actuator is electrically connected to the positive terminal of the power supply, and the negative terminal of the second thermoelectric cooler is electrically connected to the negative terminal of the power supply. The controller is used to control the fifth actuator to turn on or off according to the temperature detected by the second temperature sensor.

8. The display device according to any one of claims 3 to 7, characterized in that, The display device further includes: The first heat dissipation fin is located on the side of the first semiconductor cooling chip away from the display module; The second heat dissipation fin is located on the side of the second semiconductor cooling chip that is away from the display module.

9. The display device according to claim 8, characterized in that, The backlight module also includes a back plate, which is located on the side of the light guide plate away from the liquid crystal display panel. The back plate is frame-shaped, and the first semiconductor cooling chip is located inside the frame of the back plate. The first heat dissipation fins are also located on the side of the back plate away from the backlight module.

10. The display device according to claim 9, characterized in that, The display module also includes: A heat insulation pad includes a first heat insulation portion and a second heat insulation portion connected to each other. The first heat insulation portion is disposed between the back plate and the first semiconductor cooling chip, and the second heat insulation portion is located at least between the back plate and the first heat dissipation fin.

11. The display device according to claim 10, characterized in that, The first heat insulation part is configured as a ring, and the first heat insulation part is interference-fitted between the first semiconductor cooling chip and the back plate.

12. The display device according to any one of claims 3 to 7, characterized in that, The display device further includes: A first thermally conductive connection layer is bonded between the first semiconductor cooling chip and the display module; The second thermally conductive bonding layer is bonded between the second semiconductor cooling chip and the display module.

13. The display device according to claim 7, characterized in that, The first actuator is a transistor or an electromagnetic switch, the second actuator is a transistor or an electromagnetic switch, the third actuator is a transistor or an electromagnetic switch, the fourth actuator is a transistor or an electromagnetic switch, and the fifth actuator is a transistor or an electromagnetic switch.

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