Display panel and display device

Abstract

The invention discloses a display panel and a display device.The display panel comprises a first light sensor, a second light sensor, a dimming assembly and a temperature control assembly, the first light sensor is used for sensing external environment light, and the orthographic projection of a shading layer on an array substrate covers the orthographic projection of the second light sensor on the array substrate; the dimming assembly receives the output voltages of the first light sensor and the second light sensor, and adjusts the display brightness of the display panel according to the output voltages of the first light sensor and the second light sensor; the temperature control assembly is arranged on the array substrate and used for regulating and controlling the temperature of the area where the first light sensor and the second light sensor are located, so that the temperature of the area where the first light sensor and the second light sensor are located is the same. Through the design, the accuracy of the light sensor can be improved, and the dimming effect of the display panel is further improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] With the development of display technology, liquid crystal display (LCD) panels are becoming more and more popular due to their advantages such as lightness and low radiation. The liquid crystal display panel includes an array substrate and a color film substrate arranged relatively to each other, and a liquid crystal layer arranged between the two. The brightness is adjusted by controlling the deflection of the liquid crystal. At present, a light sensor is usually set in the liquid crystal display panel to sense the brightness of the external ambient light, and then the display brightness of the liquid crystal display panel is adjusted according to the brightness of the external ambient light to adapt to user needs.

[0003] However, since the light sensor is affected by temperature, it will output different light detection results at different temperatures, thereby affecting the accuracy of ambient light detection and making the dimming effect of the liquid crystal display panel inaccurate. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a display panel and a display device, which can improve the accuracy of the light sensor and thus improve the dimming effect of the display panel.

[0005] An embodiment of the present application discloses a display panel, which includes an array substrate and a color film substrate that are arranged relatively to each other, and also includes a first light sensor, a second light sensor, a dimming component and a temperature control component, wherein the first light sensor is arranged on the array substrate for sensing external ambient light; the second light sensor is arranged on the array substrate in parallel with the first light sensor, and a shading layer is provided on the color film substrate, and the orthographic projection of the shading layer on the array substrate covers the orthographic projection of the second light sensor on the array substrate; the dimming component is connected to the first light sensor and the second light sensor at the same time, receives the output voltage of the first light sensor and the second light sensor, and adjusts the display brightness of the display panel according to the output voltage of the first light sensor and the second light sensor; the temperature control component is arranged on the array substrate, and the temperature control component is used to regulate the temperature of the area where the first light sensor and the second light sensor are located, so that the temperature of the area where the first light sensor and the second light sensor are located is the same.

[0006] Optionally, the temperature control component includes a power supply, a temperature detector and a temperature regulator, the temperature detector is used to sense the temperature of the area where the first light sensor and the second light sensor are located, and the temperature regulator is used to adjust the temperature of the area where the first light sensor and the second light sensor are located; when the temperature detected by the temperature detector is within a preset range, the power supply is connected to the temperature regulator, and the temperature regulator adjusts the temperature of the area where the first light sensor and the second light sensor are located.

[0007] Optionally, the temperature detector includes a first metal layer and a second metal layer arranged opposite to each other, and an insulating wall arranged between the first metal layer and the second metal layer, the second metal layer is arranged on the side of the first metal layer facing the color film substrate, and the first metal layer, the second metal layer and the insulating wall together form a cavity; the temperature detector also includes a heat-expanding conductive medium, which is filled in the cavity; the temperature regulator includes a heating plate, which is arranged on the side of the first light sensor and the second light sensor away from the color film substrate; when the temperature of the area where the first light sensor and the second light sensor are located is within the preset range, the heat-expanding conductive medium expands to connect the first metal layer and the second metal layer.

[0008] Optionally, two ends of the heating plate are respectively connected to two ends of the power supply, and the first metal layer and the second metal layer are respectively connected to two ends of the power supply; when the heat-expanded conductive medium expands and connects the first metal layer and the second metal layer, the heating plate is short-circuited.

[0009] Optionally, along the direction from the first metal layer to the second metal layer, the cross-sectional area of ​​the cavity gradually decreases.

[0010] Optionally, the first metal layer is connected to one end of the power supply, the second metal layer is connected to one end of the heating plate, and the other end of the heating plate is connected to the other end of the power supply; when the heat-expanded conductive medium expands and connects the first metal layer and the second metal layer, the heating plate is connected to the power supply.

[0011] Optionally, along the direction from the first metal layer to the second metal layer, the cross-sectional area of ​​the cavity gradually increases.

[0012] Optionally, the first metal layer is formed in the same process as the gate of the active switch in the array substrate, the second metal layer is formed in the same process as the source of the active switch in the array substrate, and the insulating wall is formed in the same process as the insulating layer of the active switch in the array substrate.

[0013] Optionally, the orthographic projection of the heating plate on the array substrate covers the orthographic projection of the first light sensor on the array substrate and the orthographic projection of the second light sensor on the array substrate.

[0014] The embodiment of the present application further discloses a display device, which includes a backlight module and the display panel as described above, wherein the backlight module provides backlight for the display panel.

[0015] The beneficial effects of the embodiments of the present application are as follows: the embodiments of the present application arrange the first light sensor and the second light sensor on the array substrate, and the first light sensor can receive the external ambient light without being blocked above, while the second light sensor is blocked by the shading layer above and cannot receive the external ambient light; at the same time, the embodiments of the present application also control the temperature of the first light sensor and the second light sensor through the temperature control component, so that the temperature of the area where the first light sensor and the second light sensor are located is the same. At this time, the output voltage of the first light sensor is only affected by the external ambient light relative to the output voltage of the second light sensor, and other conditions are the same, thereby overcoming the influence of factors such as temperature on the light sensor. Therefore, the dimming component can accurately detect the external ambient light according to the output voltages of the first light sensor and the second light sensor, thereby improving the dimming effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings: Figure 1 is a partial cross-sectional schematic diagram of a display panel provided in an embodiment of the present application; Figure 2 is a partial circuit diagram of a display panel provided in an embodiment of the present application; Figure 3 is a partial cross-sectional schematic diagram of another display panel provided in an embodiment of the present application; Figure 4 is a schematic diagram of a temperature detector provided in an embodiment of the present application; Figure 5 is a schematic diagram of a temperature control component provided in an embodiment of the present application; Figure 6 is a schematic diagram of a cavity provided in an embodiment of the present application; Figure 7 is a schematic diagram of another temperature control component provided in an embodiment of the present application; Figure 8 is a schematic diagram of another cavity provided in an embodiment of the present application; Fig. 9 It is a schematic diagram of a display device provided in an embodiment of the present application.

[0017] Among them, 10, display device; 20, display panel; 21, array substrate; 22, color film substrate; 23, shading layer; 30, backlight module; 100, first light sensor; 200, second light sensor; 300, dimming component; 400, temperature control component; 410, power supply; 420, temperature detector; 421, first metal layer; 422, second metal layer; 423, insulating wall; 424, cavity; 425, conductive medium that expands due to heat; 430, temperature regulator; 431, heating plate. DETAILED DESCRIPTION

[0018] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative, but the present application can be implemented in many alternative forms and should not be construed as being limited to only the embodiments described herein.

[0019] In addition, unless otherwise clearly specified or limited, "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internally connected between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0020] Figure 1 is a partial cross-sectional schematic diagram of a display panel. Figure 2 It is a partial circuit diagram of a display panel, such as Figure 1 and Figure 2 As shown, the display panel 20 is a liquid crystal panel, including an array substrate 21 and a color film substrate 22 arranged relatively to each other, and also including a first light sensor 100 and a second light sensor 200 arranged on the array substrate 21, there is no light blocking structure above the first light sensor 100, and the external ambient light can be irradiated on the first light sensor 100, and the first light sensor 100 is used to sense the external ambient light; the second light sensor 200 is arranged in parallel with the first light sensor 100, and a light blocking structure is provided on the second light sensor 200, and the second light sensor 200 cannot receive the external ambient light.

[0021] The input end of the first light sensor 100 and the input end of the second light sensor 200 receive the same voltage V1. The display panel 20 further includes a dimming component 300. The dimming component 300 is connected to the output end of the first light sensor 100 and the output end of the second light sensor 200 at the same time, receives the output voltages of the first light sensor 100 and the second light sensor 200, and calculates the voltage difference V0 between the first light sensor 100 and the second light sensor 200. This voltage difference is the voltage value generated when the first light sensor 100 is only affected by ambient light. The brightness value that needs to be adjusted for the display panel 20 can be calculated based on this voltage value, and the purpose of adjusting the display brightness of the display panel 20 is achieved by controlling the driving voltage of the driving chip to the data line.

[0022] In the embodiment of the present application, a light shielding layer 23 is provided on the color filter substrate 22, and the orthographic projection of the light shielding layer 23 on the array substrate 21 covers the orthographic projection of the second light sensor 200 on the array substrate 21; and a hollow hole is provided at the position of the light shielding layer 23 corresponding to the first light sensor 100 to prevent the external ambient light from irradiating the first light sensor 100. Of course, in other embodiments, the light shielding layer 23 can also be directly attached to the top of the second light sensor 200.

[0023] In the embodiment of the present application, the first light sensor 100 and the second light sensor 200 both adopt a thin film transistor structure and are formed by the same process to avoid the problem of process deviation causing the first light sensor 100 and the second light sensor 200 to have a detection result deviation. Of course, in other embodiments, the first light sensor 100 and the second light sensor 200 may also adopt a photodiode structure, and the first light sensor 100 and the second light sensor 200 may not be fabricated on the array substrate 21 by a deposition process, but may be formed by patching.

[0024] In the embodiment of the present application, the first light sensor 100 and the second light sensor 200 can be formed by the same process as the active switch in the array substrate 21 to reduce the process steps of the panel.

[0025] In the embodiment of the present application, the first light sensor 100 and the second light sensor 200 can be simultaneously located in the non-display area of ​​the array substrate 21 to avoid affecting the aperture ratio of the display area; or, the first light sensor 100 and the second light sensor 200 can have multiple groups, and the multiple groups of first light sensors 100 and second light sensors 200 are respectively located in different pixel areas, so that the ambient light of different display areas can be detected to perform local dimming on the display images of different display areas, thereby improving the dimming effect.

[0026] Research has found that light sensors are also affected by factors such as temperature, and the output results of light sensors will deviate at different temperatures. In addition, there are heat source structures such as batteries, chips, and circuits in the display device. Since the first light sensor 100 and the second light sensor 200 are at different distances from the heat source, the temperature of the area where the first light sensor 100 and the second light sensor 200 are located will change, resulting in different heating of the first light sensor 100 and the second light sensor 200, which will lead to detection deviation.

[0027] Based on this, Figure 2 and Figure 3 As shown, the embodiment of the present application further adds a temperature control component 400 in the display panel 20, and the temperature control component 400 is arranged on the array substrate 21. The temperature control component 400 is used to adjust the temperature of the area where the first light sensor 100 and the second light sensor 200 are located, so that the temperature of the area where the first light sensor 100 and the second light sensor 200 are located is the same.

[0028] The embodiment of the present application sets a first light sensor 100 and a second light sensor 200 on the array substrate 21, and the first light sensor 100 is not blocked above and can receive external ambient light, while the second light sensor 200 is blocked by the shading layer 23 above and cannot receive external ambient light; at the same time, the embodiment of the present application also controls the temperature of the first light sensor 100 and the second light sensor 200 through the temperature control component 400, so that the temperature of the area where the first light sensor 100 and the second light sensor 200 are located is the same. At this time, the output voltage of the first light sensor 100 is only affected by the external ambient light relative to the output voltage of the second light sensor 200, and other conditions are the same, thereby overcoming the influence of factors such as temperature on the light sensor. Therefore, the dimming component 300 can accurately detect the external ambient light according to the output voltages of the first light sensor 100 and the second light sensor 200, thereby improving the dimming effect of the display panel 20.

[0029] In the embodiments of the present application, Figure 5 and Figure 7 As shown, the temperature control component 400 includes a power supply 410, a temperature detector 420 and a temperature regulator 430, the temperature detector 420 is used to sense the temperature of the area where the first light sensor 100 and the second light sensor 200 are located, and the temperature regulator 430 is used to adjust the temperature of the area where the first light sensor 100 and the second light sensor 200 are located; when the temperature detected by the temperature detector 420 is within a preset range, the power supply 410 is connected to the temperature regulator 430, and the temperature regulator 430 adjusts the temperature of the area where the first light sensor 100 and the second light sensor 200 are located.

[0030] The power supply 410 can be powered by a voltage line on the display panel 20, so that the power supply is powered when the display panel 20 is displaying, so as to reduce the control design of the power supply 410. The temperature in the preset range can be room temperature, high temperature or low temperature, which is selected according to the actual situation.

[0031] In one embodiment, if Figure 4 As shown, the temperature detector 420 includes a first metal layer 421 and a second metal layer 422 that are relatively arranged, and an insulating wall 423 arranged between the first metal layer 421 and the second metal layer 422, the second metal layer 422 is arranged on the side of the first metal layer 421 facing the color film substrate 22, and the first metal layer 421, the second metal layer 422 and the insulating wall 423 together form a cavity 424.

[0032] The temperature detector 420 also includes a heat-expanding conductive medium 425, which is filled in the cavity 424; when the temperature of the area where the first light sensor 100 and the second light sensor 200 are located is within the preset range, the heat-expanding conductive medium 425 expands to connect the first metal layer 421 and the second metal layer 422, and controls the temperature regulator 430 to increase or decrease the temperature, thereby adjusting the temperature of the area where the first metal layer 421 and the second metal layer 422 are located.

[0033] The heat-expandable conductive medium 425 expands when exposed to heat, and the heat-expandable conductive medium 425 is also conductive; when the heat-expandable conductive medium 425 is at a relatively low temperature or room temperature, the volume of the heat-expandable conductive medium 425 is relatively small and cannot fill the cavity 424, so that it will not contact the first metal layer 421 and the second metal layer 422 at the same time, connecting the first metal layer 421 and the second metal layer 422; when the heat-expandable conductive medium 425 is at a relatively high temperature, the heat-expandable conductive medium 425 expands, and the volume after expansion increases, occupying more space in the cavity 424, and then contacting the first metal layer 421 and the second metal layer 422 at the same time, connecting the first metal layer 421 and the second metal layer 422.

[0034] It should be noted that the cavity 424 is evacuated to avoid the problem that the heat-expanded conductive medium 425 squeezes the air in the cavity 424 after expansion, causing the second metal layer 422 to fall off.

[0035] The heat-expanded conductive medium 425 may be mercury or other liquid materials, expanded graphite or other solid materials, or a mixed material of an expandable material and a conductive material. The selection is made based on actual conditions and is not limited here.

[0036] In the embodiment of the present application, the temperature detector 420 can determine the temperature of the area where the first light sensor 100 and the second light sensor 200 are located based on the conduction status of the first metal layer 421 and the second metal layer 422. When the temperature of the area where the first light sensor 100 and the second light sensor 200 are located reaches a certain limit, the expansion degree of the heat-expanded conductive medium 425 can contact the second metal layer 422, connecting the first metal layer 421 and the second metal layer 422. At this time, the temperature in the preset range can be understood as a temperature higher than normal temperature, specifically above 25 degrees Celsius.

[0037] In the embodiment of the present application, the temperature detector 420 can directly connect the first metal layer 421 and the second metal layer 422 according to the change in temperature, thereby changing the working state of the temperature regulator 430. It does not require algorithm design or complex circuit design, and the process is simple.

[0038] In some embodiments, the temperature detector 420 may also be a structure that directly detects temperature, such as a temperature sensor, and then a logic circuit combined with a switch is used to control the temperature regulator 430.

[0039] In the embodiment of the present application, the temperature regulator 430 is designed with a heating plate 431, and the heating plate 431 is made of metal materials such as copper and molybdenum, and is arranged on the side of the first light sensor 100 and the second light sensor 200 away from the color film substrate 22; when the heating plate 431 is powered on, the heating plate 431 emits heat, thereby increasing the temperature of the area where the first metal layer 421 and the second metal layer 422 are located, so that the first light sensor 100 and the second light sensor 200 are subjected to the same temperature.

[0040] In some embodiments, the temperature regulator 430 may also be designed with a resistance wire such as a coil or a winding.

[0041] In some embodiments, the temperature regulator 430 may be a refrigeration structure, which uses magnetic refrigeration technology or a thermoelectric structure to cool the area where the first metal layer 421 and the second metal layer 422 are located, so that the first light sensor 100 and the second light sensor 200 are subjected to the same temperature.

[0042] In the embodiment of the present application, the orthographic projection of the heating plate 431 on the array substrate 21 covers the orthographic projection of the first light sensor 100 on the array substrate 21 and the orthographic projection of the second light sensor 200 on the array substrate 21. With this design, the heating plate 431 can heat the first light sensor 100, the second light sensor 200 and the surrounding area at the same time, so that the first light sensor 100 and the second light sensor 200 are subjected to the same amount of heat everywhere, thereby avoiding temperature differences.

[0043] In the embodiment of the present application, the first metal layer 421 is formed in the same process as the gate of the active switch in the array substrate 21, the second metal layer 422 is formed in the same process as the source of the active switch in the array substrate 21, and the insulating wall 423 is formed in the same process as the insulating layer of the active switch in the array substrate 21. Through this design, the total process steps in the display panel 20 can be reduced, the production efficiency can be improved, and the production cost can be reduced. After the insulating layer is made, a through hole is etched in the insulating layer part above the first metal layer 421 through an etching process, and then a heat-expanded conductive medium 425 is filled in the through hole under vacuum conditions, and then a metal sheet is laid above the through hole, and finally a metal material is deposited to obtain the second metal layer 422. Of course, other methods can also be used to make the temperature detector 420, which will not be described one by one here.

[0044] like Figure 5 As shown, as an implementation mode of a temperature control component 400, the two ends of the heating plate 431 are respectively connected to the two ends of the power supply 410, and the first metal layer 421 and the second metal layer 422 are respectively connected to the two ends of the power supply 410; when the heat-expanded conductive medium 425 expands and connects the first metal layer 421 and the second metal layer 422, the heating plate 431 is short-circuited.

[0045] In this embodiment, the preset range is a normal temperature or low temperature condition, that is, a temperature not exceeding 25 degrees Celsius is set as the preset range.

[0046] Under normal or low temperature conditions, the temperature generated by the heat source in the display device is more obvious than the ambient temperature, and is likely to affect the first light sensor 100 and the second light sensor 200. Therefore, in this embodiment, the temperature detector 420 and the temperature regulator 430 are designed in parallel. Under normal or low temperature conditions, the heat-expanded conductive medium 425 is in an initial state and does not expand. The temperature regulator 430, that is, the heating plate 431, is in a conductive state, and the area where the first light sensor 100 and the second light sensor 200 are located is heated, so that the first light sensor 100 and the second light sensor 200 are simultaneously subjected to a higher temperature. Since the heating effect of the heating plate 431 on the first light sensor 100 and the second light sensor 200 is much greater than the heating effect of the heat source in the display device on the first light sensor 100 and the second light sensor 200, the temperature generated by the heat source in the display device can be ignored. Finally, after the dimming component 300 subtracts the output voltages of the first light sensor 100 and the second light sensor 200, a more accurate ambient light detection result can be obtained.

[0047] At high temperatures or above normal temperature, the temperature generated by the heat source in the display device is not obvious compared to the ambient temperature, and the first light sensor 100 and the second light sensor 200 are less affected by the heat source in the display device, so there is no need to control the temperature. At this time, the heat-expanded conductive medium 425 expands, connecting the first metal layer 421 and the second metal layer 422 to short-circuit the heating plate 431, so that the heating plate 431 cannot be heated. Moreover, this design can also prevent the first light sensor 100 and the second light sensor 200 from being subjected to a higher temperature, and avoid the problem of device degradation caused by long-term operation.

[0048] Of course, in some embodiments, a refrigeration structure design may be further added to control the heating plate 431 to generate heat under normal or low temperature conditions; and to control the refrigeration structure to perform cooling under high temperature conditions.

[0049] Further, such as Figure 6 As shown, the cross-sectional area of ​​the cavity 424 gradually decreases along the direction from the first metal layer 421 to the second metal layer 422. With this design, the heat-expanded conductive medium 425 can quickly move upward in the cavity 424 after expansion, and the first metal layer 421 and the second metal layer 422 are quickly connected at the initial stage of the temperature rise in the area where the first light sensor 100 and the second light sensor 200 are located, and the heating plate 431 is short-circuited, thereby achieving a rapid regulation effect.

[0050] like Figure 7As shown, as another embodiment of the temperature control component 400, the first metal layer 421 is connected to one end of the power supply 410, the second metal layer 422 is connected to one end of the heating plate 431, and the other end of the heating plate 431 is connected to the other end of the power supply 410; when the heat-expanded conductive medium 425 expands and connects the first metal layer 421 and the second metal layer 422, the heating plate 431 is connected to the power supply 410.

[0051] In this embodiment, the preset range is a high temperature or a temperature exceeding normal temperature, that is, a temperature above 25 degrees Celsius is set as the preset range.

[0052] Considering that when the display device is used for a long time or the display device is in a high-power operation mode, the heat source in the display device will generate a higher temperature. Due to the different distances between the first light sensor 100 and the second light sensor 200 and the heat source, the temperatures they are subjected to will be significantly different. Based on this problem, the temperature detector 420 and the temperature regulator 430 are designed in series in this embodiment. The temperature detector 420 is equivalent to a switch. When the heat-expanded conductive medium 425 expands and connects the first metal layer 421 and the second metal layer 422, the heating plate 431 is energized to heat the area where the first light sensor 100 and the second light sensor 200 are located, thereby causing the first light sensor 100 and the second light sensor 200 to be subjected to a temperature increase to a similar degree, so as to reduce the detection difference.

[0053] Further, such as Figure 8 As shown, the cross-sectional area of ​​the cavity 424 gradually increases along the direction from the first metal layer 421 to the second metal layer 422. With this design, when the temperature of the area where the first light sensor 100 and the second light sensor 200 are located continues to rise, the expansion degree of the heat-expanded conductive medium 425 will gradually increase, and the area in contact with the second metal layer 422 in the cavity 424 will gradually increase. The better the conductive effect, the higher the current of the heating plate 431, the higher the heat generation degree, and thus the higher the heat can be applied to the first light sensor 100 and the second light sensor 200, so that the temperature of the area where the first light sensor 100 and the second light sensor 200 are located is higher, thereby reducing the detection difference between the first light sensor 100 and the second light sensor 200 caused by the different temperatures.

[0054] like Fig. 9 As shown, an embodiment of the present application further provides a display device, wherein the display device 10 includes a backlight module 30 and the display panel 20 as described above, and the backlight module 30 provides backlight for the display panel 20 .

[0055] The above content is a further detailed description of the present application in combination with specific optional implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed to fall within the scope of protection of the present application.

Claims

1. A display panel, comprising an array substrate and a color film substrate arranged opposite to each other, characterized in that: The display panel further includes: A first light sensor, disposed on the array substrate, for sensing external ambient light; A second light sensor is arranged on the array substrate in parallel with the first light sensor, and a light shielding layer is provided on the color filter substrate, and the orthographic projection of the light shielding layer on the array substrate covers the orthographic projection of the second light sensor on the array substrate; a dimming component connected to the first light sensor and the second light sensor at the same time, receiving the output voltage of the first light sensor and the second light sensor, and adjusting the display brightness of the display panel according to the output voltage of the first light sensor and the second light sensor; and A temperature control component is arranged on the array substrate, and is used to adjust the temperature of the area where the first light sensor and the second light sensor are located, so that the temperature of the area where the first light sensor and the second light sensor are located is the same.

2. The display panel according to claim 1, wherein: The temperature control component includes a power supply, a temperature detector and a temperature regulator, wherein the temperature detector is used to sense the temperature of the area where the first light sensor and the second light sensor are located, and the temperature regulator is used to adjust the temperature of the area where the first light sensor and the second light sensor are located; When the temperature detected by the temperature detector is within a preset range, the power supply is connected to the temperature regulator, and the temperature regulator regulates the temperature of the area where the first light sensor and the second light sensor are located.

3. The display panel according to claim 2, wherein: The temperature detector comprises a first metal layer and a second metal layer arranged opposite to each other, and an insulating wall arranged between the first metal layer and the second metal layer, the second metal layer is arranged on a side of the first metal layer facing the color film substrate, and the first metal layer, the second metal layer and the insulating wall together form a cavity; The temperature detector further comprises a heat-expanding conductive medium, which is filled in the cavity; the temperature regulator comprises a heating plate, which is arranged on a side of the first light sensor and the second light sensor away from the color filter substrate; When the temperature of the area where the first light sensor and the second light sensor are located is within the preset range, the heat-expandable conductive medium expands to connect the first metal layer and the second metal layer.

4. The display panel according to claim 3, wherein: Two ends of the heating plate are respectively connected to two ends of the power supply, and the first metal layer and the second metal layer are respectively connected to two ends of the power supply; When the heat-expandable conductive medium expands and connects the first metal layer and the second metal layer, the heating plate is short-circuited.

5. The display panel according to claim 4, wherein: Along the direction from the first metal layer to the second metal layer, the cross-sectional area of ​​the cavity gradually decreases.

6. The display panel according to claim 3, wherein: The first metal layer is connected to one end of the power source, the second metal layer is connected to one end of the heating plate, and the other end of the heating plate is connected to the other end of the power source; When the heat-expandable conductive medium expands and connects the first metal layer and the second metal layer, the heating plate is connected to the power source.

7. The display panel according to claim 5, wherein: Along the direction from the first metal layer to the second metal layer, the cross-sectional area of ​​the cavity gradually increases.

8. The display panel according to claim 3, wherein: The first metal layer is formed in the same process as the gate of the active switch in the array substrate, the second metal layer is formed in the same process as the source of the active switch in the array substrate, and the insulating wall is formed in the same process as the insulating layer of the active switch in the array substrate.

9. The display panel according to claim 3, wherein: The orthographic projection of the heating plate on the array substrate covers the orthographic projection of the first light sensor on the array substrate and the orthographic projection of the second light sensor on the array substrate.

10. A display device, characterized in that: The invention comprises a backlight module and a display panel as claimed in any one of claims 1 to 9, wherein the backlight module provides backlight for the display panel.

Images