Display panel and display device

Abstract

The application discloses a display panel and a display device, which comprise a timing control circuit and a scan driving circuit arranged in a non-display area and a pixel unit arranged in a display area. The timing control circuit is connected to the scan driving circuit through at least one clock signal line. The scan driving circuit is used for outputting a scan signal to the pixel unit through a scan line according to a clock signal, so that the pixel unit performs image display. The display panel further comprises a temperature detection unit and an adjusting unit. The temperature detection unit is arranged in an area where the clock signal line is located, is used for detecting the temperature of the area where the clock signal line is located, and outputs a temperature detection signal according to a detection result. The adjusting unit is connected to the temperature detection unit, the timing control circuit and the clock signal line, is used for adjusting the resistance value of the clock signal line according to the temperature detection signal, so that the temperature of the area where the clock signal line is located is lower than a preset threshold value.

Description

TECHNICAL FIELD

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

[0002] With the development of display technology, the refresh rate of display is gradually improved, but at the same time of improving the refresh rate, the transmission line for transmitting clock signal is prone to high temperature heating phenomenon due to the increasing load, and in the case of high temperature heating, the liquid crystal molecules in the liquid crystal display panel are prone to liquid crystal polarization phenomenon, thereby affecting the display effect.

[0003] Therefore, how to maintain the temperature of the area where the clock signal transmission line is located in a lower range to prevent the liquid crystal molecules from being polarized is a problem to be solved. SUMMARY

[0004] In view of the above deficiencies of the prior art, the present application provides a display panel and a display device which can effectively control the temperature of the area where the clock signal is located.

[0005] The present application provides a display panel, comprising a timing control circuit and a scan driving circuit arranged in a non-display area, and a pixel unit arranged in a display area, the timing control circuit is connected to the scan driving circuit through at least one clock signal line, and is used to output a clock signal to the scan driving circuit through the clock signal line, the scan driving circuit is used to output a scan signal to the pixel unit through a scan line according to the clock signal, so as to control the pixel unit to receive a data signal for image display through a data line for image display. The display panel further comprises a temperature detection unit and an adjustment unit, the temperature detection unit is arranged in the area where the clock signal line is located, and is used to detect the temperature of the area where the clock signal line is located and output a temperature detection signal according to the detection result, the adjustment unit is connected to the temperature detection unit, the timing control circuit and the clock signal line, and is used to adjust the resistance value of the clock signal line according to the temperature detection signal, so as to control the temperature of the area where the clock signal line is located to be lower than a preset threshold.

[0006] Optionally, the scan driving circuit comprises a plurality of scan driving units and at least one virtual scan driving unit, the virtual scan driving unit is connected in cascade with the plurality of scan driving units in sequence, the virtual scan driving unit is configured to receive the clock signal from the clock signal line and output an enable signal to the scan driving unit connected in cascade according to the clock signal, so as to enable the scan driving unit connected in cascade to output the scan signal according to the clock signal. The virtual scan driving unit also outputs a virtual scan signal according to the clock signal, the temperature detection unit is arranged in the virtual scan driving unit, the virtual scan signal changes according to the temperature detected by the temperature detection unit, and the virtual scan signal is output as the temperature detection signal to the adjusting unit.

[0007] Optionally, the virtual scan driving unit comprises a thermistor, a driving switch tube, a pull-up module and an output control node, the thermistor is the temperature detection unit, the gate of the driving switch tube is connected to the output control node, the source of the driving switch tube is connected to the clock signal line through the thermistor, and the drain of the driving switch tube is connected to the adjusting unit. The pull-up module is connected to the output control node for pulling up the potential of the output control node to control the driving switch tube to be turned on, and the thermistor adjusts the voltage of the virtual scan signal output by adjusting the internal resistance value according to the detected temperature.

[0008] Optionally, when the thermistor detects that the temperature rises, the resistance value of the thermistor increases to control the voltage of the virtual scan signal transmitted to the adjusting unit to decrease.

[0009] Optionally, the adjusting unit comprises a control end and a first adjusting module, a second adjusting module and a third adjusting module, the control end is connected to the virtual scan driving unit for receiving the virtual scan signal, and the first adjusting module, the second adjusting module and the third adjusting module are connected to the control end. When the thermistor detects that the temperature is greater than the preset threshold, the first adjusting module, the second adjusting module and the third adjusting module are selectively connected to the clock signal line and the timing control circuit under the control of the control end, so as to increase the resistance in the clock signal line.

[0010] Optionally, the first adjusting module comprises a first switch tube and a first resistor, the second adjusting module comprises a second switch tube and a second resistor, and the adjusting module comprises a third switch tube and a third resistor. The first resistor, the second resistor and the third resistor are connected in series, the gate of the first switch tube is connected to the control end, the source and the drain of the first switch tube are connected to two ends of the first resistor respectively, the gate of the second switch tube is connected to the control end, the source and the drain of the second switch tube are connected to two ends of the second resistor respectively, the gate of the third switch tube is connected to the control end, and the source and the drain of the third switch tube are connected to two ends of the third resistor respectively. When the thermistor detects that the temperature is greater than a preset threshold and gradually increases, the first switch tube, the second switch tube and the third switch tube are sequentially turned off under the control of the control end, so as to control the first resistor to the third resistor to be sequentially connected to the clock signal line.

[0011] Optionally, the first switch tube has a first threshold voltage, the second switch tube has a second threshold voltage, and the third switch tube has a third threshold voltage. The first threshold voltage is greater than the second threshold voltage, and the second threshold voltage is greater than the third threshold voltage.

[0012] Optionally, when the thermistor has a first resistance value, the virtual scan driving unit outputs the virtual scan signal with a first voltage, the first voltage is greater than the first threshold voltage, the first switch tube, the second switch tube and the third switch tube are turned on, and the clock signal is transmitted to the clock signal line through the first switch tube, the second switch tube and the third switch tube. When the thermistor rises to a second resistance value, the virtual scan driving unit outputs the virtual scan signal with a second voltage, the second voltage is less than the first threshold voltage, greater than the second threshold voltage and the third threshold voltage, the first switch tube is turned off, the second switch tube and the third switch tube are turned on, and the clock signal is transmitted to the clock signal line through the first resistance, the second switch tube and the third switch tube. When the thermistor rises to a third resistance value, the virtual scan driving unit outputs the virtual scan signal with a third voltage, the third voltage is less than the second threshold voltage, greater than the third threshold voltage, the first switch tube and the second switch tube are turned off, and the third switch tube is turned on, and the clock signal is transmitted to the clock signal line through the first resistance, the second resistance and the third switch tube. When the thermistor rises to a fourth resistance value, the virtual scan driving unit outputs the virtual scan signal with a fourth voltage, the fourth voltage is less than the third threshold voltage, the first switch tube, the second switch tube and the third switch tube are turned off, and the clock signal is transmitted to the clock signal line through the first resistance, the second resistance and the third resistance.

[0013] Optionally, the first resistance value, the second resistance value, the third resistance value and the fourth resistance value increase in turn, and the first voltage, the second voltage, the third voltage and the fourth voltage decrease in turn.

[0014] The application further provides a display device, comprising a power module and the display panel as described above, wherein the power module is used for providing driving power for image display of the display panel.

[0015] Compared with the prior art, the application can effectively avoid reducing the heating of the clock signal line by arranging a temperature detection unit in the area where the clock signal line is located and adjusting the resistance in the clock signal line according to the temperature detection result to reduce the current in the clock signal line. Meanwhile, the temperature detection unit is arranged in the virtual scan driving unit of the scan driving circuit, and the virtual scan signal output by the virtual scan driving unit is used as the temperature detection signal, so that the space can be effectively saved and the temperature detection effect can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a display device provided in the first embodiment of this application;

[0018] Figure 2 for Figure 1 A schematic diagram of the side structure of the central display panel;

[0019] Figure 3 for Figure 2 A schematic diagram of the planar layout of the array substrate;

[0020] Figure 4 for Figure 3 Schematic diagram of the equivalent circuit of the adjustment unit;

[0021] Figure 5 A schematic diagram of an equivalent circuit of an adjustment unit provided for the second embodiment;

[0022] Figure 6 for Figure 3 A block diagram of the mid-scan drive circuit;

[0023] Figure 7 for Figure 6 Schematic diagram of the equivalent circuit of the virtual scanning drive unit in the middle;

[0024] Figure 8 for Figure 7 Schematic diagram of feedback adjustment circuit for virtual scanning drive unit.

[0025] Figure label:

[0026] The display device-100, the display panel-10, the power module-20, the support frame-30, the display area-10a, the non-display area-10b, the array substrate-10c, the opposite substrate-10d, the display medium layer-10e, m data lines-S1-Sm, n scan lines-G1-Gn, the pixel unit-P, the timing control circuit-11, the data driving circuit-12, the scan driving circuit-13, the clock signal line-14, the backlight module-15, the temperature detection unit-16, the adjustment unit-17, the control end-K, the first adjustment module-171, the first switch tube-T1, the first resistor-R1, the second adjustment module-172, the scan driving unit-13A, the virtual scan driving unit-13B, the virtual end-D, the thermistor-Rh, the driving switch tube-M, the output control node-Q, the pull-up module-131, the pull-down module-132, the second switch tube-T2, the third switch tube-T3, the second resistor-R2, and the third resistor-R3. DETAILED DESCRIPTION

[0027] For the purpose of facilitating the understanding of the present application, a more complete understanding of the present application can be had by reference to the relevant drawings. The preferred embodiments of the present application are illustrated in the drawings. However, the present application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0028] The following description of the embodiments refers to the accompanying drawings, which illustrate specific embodiments of the application. The description employs, whenever appropriate, the use of relative terms such as "first", "second", "third", etc. which are used herein to distinguish one element from another, and are not intended to imply any order or sequence. The terms "connected", "coupled", or the like, unless otherwise specified, are used herein to indicate either a direct or indirect connection (coupling) between elements. The terms "upper", "lower", "front", "back", "left", "right", "inner", "outer", "side", and the like, as used herein, are made only with reference to the figures, and are not intended to denote or imply any specific orientation or configuration of the device or element being referred to, and are used merely for the purpose of illustration and explanation of the present application, and should not be construed as limiting the present application.

[0029] In the description of the present application, it should be noted that unless otherwise explicitly defined and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection; it can be direct connection, or indirect connection through intermediate medium; it can be internal connection of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. It should be noted that the terms "first", "second" and the like in the description and claims of the present application and the drawings are used to distinguish different objects, and are not used to describe a specific order.

[0030] In addition, the terms "including", "may include", "comprising", or "may comprise" used in the present application represent the existence of the corresponding functions, operations, elements, etc. disclosed, and do not limit other one or more functions, operations, elements, etc. In addition, the terms "including" or "comprising" represent the existence of the corresponding features, numbers, steps, operations, elements, components or combinations thereof disclosed in the specification, and do not exclude the existence or addition of one or more other features, numbers, steps, operations, elements, components or combinations thereof, and are intended to cover non-exclusive inclusion. In addition, when describing the embodiments of the present application, "may" is used to represent "one or more embodiments of the present application". And the term "exemplary" is intended to refer to an example or illustration.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application.

[0032] Please refer to Figure 1 , Figure 1 The structure schematic diagram of a display device provided by the first embodiment of the present application is shown in the figure. As shown in the figure, the display device 100 includes a display panel 10, a power module 20 and a support frame 30, the display panel 10 and the power module 20 are fixed to the support frame 30, the power module 20 is arranged on the back of the display panel 10, that is, the non-display surface of the display panel 10. The power module 20 is used to provide power voltage for the display panel 10 to display images, and the support frame 30 provides fixing and protection for the display panel 10 and the power module 20. In other embodiments of the present application, the display device 100 can not need to be provided with the support frame 30, for example, portable electronic devices such as mobile phones, tablet computers and the like. Figure 1

[0033] Please refer to Figure 2 , Figure 2 The structure schematic diagram of the side surface of the display panel in the Figure 1 ​​

[0034] As Figure 2 shown, the display panel 10 includes an image display area 10a and a non-display area 10b. The display area 10a is used to perform image display, and the non-display area 10b is arranged around the display area 10a to set other auxiliary components or modules. Specifically, the display panel 10 includes an array substrate 10c and a counter substrate 10d, and a display medium layer 10e sandwiched between the array substrate 10c and the counter substrate 10d. The array substrate 10c and the counter substrate 10d are provided with driving elements to generate corresponding electric fields according to data signals (Data), thereby driving the display medium layer 10e to emit light of corresponding brightness to perform image display. In this embodiment, the display medium in the display medium layer 10e can be liquid crystal molecules, Micro LED, Mini LED, LED, etc.

[0035] For example, the display panel is a liquid crystal display panel, wherein the display medium in the display medium layer 10e is liquid crystal molecules, which deflects light of a predetermined brightness to perform image display. The display panel 10 also includes a backlight module 15 (BM), which is used to provide light for the display area 10a of the display panel 10. The display panel 10 emits corresponding light according to the image signal to be displayed to perform image display. The display panel 10 also includes other elements or components, such as a signal processor module and a signal sensing module, etc.

[0036] Please refer to Figure 3 , Figure 3 for Figure 2 the planar layout of the array substrate.

[0037] The display panel 10 includes a timing control circuit 11, a data driving circuit 12 and a scan driving circuit 13. The timing control circuit 11 receives image signals, horizontal synchronization signals and vertical synchronization signals representing image information from an external signal source, and outputs clock signals, scan control signals for controlling the scan driving circuit 13, and data control signals for controlling the data driving circuit 12.

[0038] The scan driving circuit 13 receives the scan control signals output by the timing control circuit 11, and outputs scan signals to the display area 10a according to the scan control signals. The data driving circuit 12 receives the data control signals output by the timing control circuit 11, and outputs data signals (Data) to the display area 10a according to the data control signals, for cooperating with the pixel units (not labeled) in the display area 10a to perform image display.

[0039] In this embodiment, the circuit elements in the scan driving circuit 13 are manufactured in the array substrate 10c in the same process as the pixel units P in the array substrate 10c, that is, the GOA (Gate Driver on Array) technology.

[0040] The timing control circuit 11 is connected to the scan driving circuit 13 through the clock signal line 14, and is configured to transmit a clock signal to the scan driving circuit 13 through the clock signal line 14. However, as the refresh rate of the display panel 10 gradually increases, the clock signal line 14 usually has a large load, which causes the temperature to be too high, thereby causing liquid crystal polarization and affecting the display effect.

[0041] The display panel 10 further includes a temperature detection unit 16 and an adjustment unit 17. The temperature detection unit 16 is arranged in the region where the clock signal line 14 is arranged, and is configured to detect the temperature change in the region. The adjustment unit is connected between the timing control circuit 11 and the scan driving circuit 13 through the clock signal line 14, and is configured to adjust the current in the clock signal line 14 according to the detection result of the temperature detection unit 16, so as to avoid the current being too large to cause the line to heat up and further cause liquid crystal polarization.

[0042] Please refer to Figure 4 , Figure 4 for Figure 3 the equivalent circuit diagram of the adjustment unit.

[0043] As shown in Figure 4 , the adjustment unit 17 includes at least two first adjustment modules 171 connected in series. The first adjustment module 171 includes a first switch tube T1 and a first resistor R1. The first resistor R1 is connected between the clock signal line 14 and the timing control circuit 11. The first switch tube T1 and the first resistor R1 are connected in parallel, that is, the gate of the first switch tube T1 is connected to the control end K, and the source and the drain are connected to the first resistor R1. By controlling the conduction and the cutoff of the first switch tube T1, the number of the first resistor R1 connected in series is adjusted, and thus the size of the current in the clock signal line 14 is adjusted.

[0044] When the temperature detection unit 16 detects that the temperature is within a preset range, that is, less than a preset threshold, the first switch tube T1 in each first adjustment module 171 is turned on to control the clock signal to be transmitted to the clock signal line 14 through the first switch tube T1. When the temperature detection unit 16 detects that the temperature is greater than the threshold temperature, at least one first switch tube T1 is controlled to be cut off, so that at least one first resistor R1 is connected to the clock signal line 14 to increase the resistance value in the clock signal line 14, thereby reducing the current and reducing the heat of the line.

[0045] In the exemplary embodiment, the threshold temperature can be set between 45℃ and 50℃, and can also be set to other temperatures according to the specific needs of the display panel, which is not limited in the present application.

[0046] Please refer to Figure 5 , Figure 5 An equivalent circuit schematic diagram of an adjustment unit provided for the second embodiment.

[0047] As Figure 5 shown, the adjustment unit 17 includes at least two first adjustment modules 171, and the plurality of first adjustment modules 171 are connected in parallel to the clock signal line 14 for adjusting the current size in the clock signal line 14. The first adjustment module 171 includes a first switch tube T1 and a first resistor R1, the gate of the first switch tube T1 is connected to the control end K, the source of the first switch tube T1 is connected to the timing control circuit 11, and the drain of the first switch tube T1 is connected to the first resistor R1, for being turned on under the control of the control end K, so as to transmit the clock signal output by the timing control circuit 11 to the scan driving circuit 13 through the first resistor R1 and the clock signal line 14.

[0048] The adjustment unit 17 further includes a second adjustment module 172 connected in parallel with the first adjustment module 171, and the second adjustment module 172 includes a first switch tube T1, the gate of the first switch tube T1 is connected to the control end K, the source of the first switch tube T1 is connected to the timing control circuit 11, and the drain of the first switch tube T1 is connected to the scan driving circuit 13 through the clock signal line 14, for being turned on under the control of the control end K, so as to transmit the clock signal to the scan driving circuit 13 through the clock signal line 14.

[0049] That is, when the temperature detection unit 16 detects that the temperature is within the preset range, the second adjustment module 172 is turned on, so that the adjustment unit 17 does not increase the resistance in the clock signal line, and when the temperature detection unit 16 detects that the temperature is greater than the threshold temperature, at least one first adjustment module 171 is controlled to be turned on to increase the resistance value in the line, thereby reducing the current in the clock signal line 14, and thus reducing the heating of the clock signal line 14.

[0050] Please refer to Figure 6 , Figure 6 A block schematic diagram of the scan driving circuit in Figure 3 .

[0051] As Figure 6As shown, the scan driving circuit 13 comprises a plurality of scan driving units 13A and at least one virtual scan driving unit 13B, the virtual scan driving unit 13B is configured to receive a clock signal from a clock signal line 14 and output an enable signal to a scan driving unit 13A cascaded therewith according to the clock signal, so as to enable the scan driving unit 13A cascaded therewith to output a scan signal according to the clock signal.

[0052] The virtual scan driving unit 13B is further configured to output a virtual scan signal according to the clock signal, a temperature detecting unit 16 is arranged in the virtual scan driving unit, the virtual scan signal varies according to a temperature detected by the temperature detecting unit 16, and the virtual scan signal is output as a temperature detecting signal to an adjusting unit 17.

[0053] The scan driving unit 13A is configured to receive the clock signal from the clock signal line 14 and output the scan signal according to the clock signal, so as to control a pixel unit in the display area 10a to receive a data signal for image display and perform image display.

[0054] Please refer to Figure 7 , Figure 7 As shown in Figure 6 the equivalent circuit diagram of the virtual scan driving unit.

[0055] As shown in Figure 7 , the virtual scan driving unit 13B comprises a thermistor Rh, a driving switch tube M, a pull-up module 131, a pull-down module 132 and an output control node Q, wherein a gate of the driving switch tube M is connected to the output control node Q, a source of the driving switch tube M is connected to the clock signal line 14 through the thermistor Rh, and a drain of the driving switch tube M is connected to a virtual terminal D.

[0056] The pull-up module 131 and the pull-down module 132 are connected to the output control node Q, the pull-up module 131 is configured to pull up a potential of the output control node Q, so as to control the driving switch tube M to be turned on, when the driving switch tube M is turned on, the clock signal in the clock signal line 14 is transmitted to the driving switch tube M through the thermistor Rh and to the virtual terminal D through the second node Q2. The pull-down module 132 is configured to pull down the potential of the output control node Q, so as to control the driving switch tube M to be turned off, thereby controlling the driving switch tube M to stop receiving the clock signal.

[0057] The thermistor Rh can be a positive coefficient thermistor, the resistance value of which increases with the increase of temperature, therefore, the temperature change around the clock signal line 14 will affect the resistance value change of the thermistor Rh. When the temperature around the virtual scan driving unit 13B rises, the resistance of the thermistor Rh increases, the current flowing through the thermistor Rh decreases, so that the voltage in the virtual scan signal output by the virtual scan driving unit 13B decreases.

[0058] Please refer toFigure 8 , Figure 8 For Figure 7 The feedback adjustment circuit of the virtual scan driving unit.

[0059] As Figure 8 shown, the output end of the virtual scan driving unit 13B is electrically connected with the control end K of the adjustment unit, that is, the virtual end D is connected with the control end K, to control the virtual scan driving unit 13B to transmit the virtual scan signal to the control end K, to directly control the adjustment unit 17 to adjust the internal resistance value change.

[0060] The adjustment unit 17 includes a first adjustment module 171, a second adjustment module 172 and a third adjustment module 173, wherein the first adjustment module 171, the second adjustment module 172 and the third adjustment module 173 are connected in series between the clock signal line 14 and the timing control circuit 11. The first adjustment module 171 includes a first switch tube T1 and a first resistor R1, the gate of the first switch tube T1 is connected to the control end K, and the source and the drain are connected to the two ends of the first resistor R1, for conducting under the control of the control end K, to short the first resistor R1, for controlling the clock signal to be transmitted to the second adjustment module 172 through the first switch tube T1, when the first switch tube T1 is cut off, the clock signal is transmitted to the second adjustment module 172 through the first resistor R1.

[0061] The second adjustment module 172 includes a second switch tube T2 and a second resistor R2, the gate of the second switch tube T2 is connected to the control end K, and the source and the drain are connected to the two ends of the second resistor R2, for conducting under the control of the control end K, to short the second resistor R2, for controlling the clock signal to be transmitted to the third adjustment module 173 through the second switch tube T2, when the second switch tube T2 is cut off, the clock signal is transmitted to the third adjustment module 173 through the second resistor R2.

[0062] The third adjustment module 173 includes a third switch tube T3 and a third resistor R3, the gate of the third switch tube T3 is connected to the control end K, and the source and the drain are connected to the third resistor R3, for conducting under the control of the control end K, to short the third resistor R3, for controlling the clock signal to be transmitted to the clock signal line 14 through the third switch tube T3 and transmitted to the scan driving circuit 13 through the clock signal line 14, when the third switch tube T3 is cut off, the clock signal is transmitted to the clock signal line 14 through the third resistor R3.

[0063] Wherein, the first switch tube T1 has a first threshold voltage Th1, the second switch tube T2 has a second threshold voltage Th2, and the third switch tube T3 has a third threshold voltage Th3, the first threshold voltage Th1 is greater than the second threshold voltage Th2, and the second threshold voltage Th2 is greater than the third threshold voltage Th3.

[0064] When the temperature around the virtual scan driving unit 13B is the first temperature, the thermistor Rh has a first resistance value, i.e. the thermistor Rh is at the first resistance value under the influence of temperature, the virtual scan driving unit 13B outputs a first virtual scan signal with a first voltage V1 to control the first switch tube T1, the second switch tube T2 and the third switch tube T3 to be conductive, and the clock signal is transmitted to the clock signal line 14 through the first switch tube T1, the second switch tube T2 and the third switch tube T3. That is, the first threshold voltage Vh1, the second threshold voltage Vh2 and the third threshold voltage Vh3 are all less than the first voltage V1, so when the first virtual scan signal with the first voltage V1 is output, the first switch tube T1, the second switch tube T2 and the third switch tube T3 are all in the conductive state.

[0065] When the temperature around the virtual scan driving unit 13B rises to the second temperature, the thermistor Rh has a second resistance value, and the virtual scan driving unit 13B outputs a second virtual scan signal with a second voltage V2 to control the first switch tube T1 to be cut off and the second switch tube T2 and the third switch tube T3 to be conductive, for controlling the first resistor R1 to be connected in series with the clock signal line 14 to increase the resistance value of the clock signal line 14, thereby reducing the current in the clock signal line 14. That is, the second voltage V2 is less than the first threshold voltage Vh1, and the second voltage V2 is greater than the second threshold voltage Vh2 and the third threshold voltage Vh3, to control the first switch tube T1 to be in the cut-off state and control the second switch tube T2 and the third switch tube T3 to be in the conductive state.

[0066] When the temperature around the virtual scan driving unit 13B rises to the third temperature, the thermistor Rh has a third resistance value, and the virtual scan driving unit 13B outputs a third virtual scan signal with a third voltage V3 to control the first switch tube T1 and the second switch tube T2 to be cut off and the third switch tube T3 to be conductive, for controlling the first resistor R1 and the second resistor R2 to be connected in series with the clock signal line 14 to increase the resistance value of the clock signal line 14, thereby reducing the current in the clock signal line 14. That is, the third voltage V3 is greater than the third threshold voltage Vh3, and the third voltage V3 is less than the first threshold voltage Vh1 and the second threshold voltage Vh2, to control the first switch tube T1 and the second switch tube T2 to be in the cut-off state and control the third switch tube T3 to be in the conductive state.

[0067] When the temperature around the virtual scan driving unit 13B rises to a fourth temperature, the thermistor Rh has a fourth resistance value, the virtual scan driving unit 13B outputs a fourth virtual scan signal with a fourth voltage V4 to control the first switch tube T1, the second switch tube T2 and the third switch tube T3 to be in an off state, and the first resistance R1, the second resistance R2 and the third resistance R3 are connected in series with the clock signal line 14 to increase the resistance value of the clock signal line 14, thereby reducing the current in the clock signal line 14 to reduce the heat of the line. That is, the first threshold voltage Vh1, the second threshold voltage Vh2 and the third threshold voltage Vh3 are all greater than the fourth voltage V4 to control the first switch tube T1, the second switch tube T2 and the third switch tube T3 to be in an off state.

[0068] By setting the temperature detection unit 16 in the area where the clock signal line is located and adjusting the resistance in the clock signal line according to the temperature detection result to reduce the current in the clock signal line, the heat of the clock signal line can be effectively reduced. At the same time, the temperature detection unit 16 is set in the virtual scan driving unit of the scan driving circuit, and the virtual scan signal output by the virtual scan driving unit is used as the temperature detection signal, which can effectively save space and improve the temperature detection effect.

[0069] It should be understood that the application of the present application is not limited to the above examples, and those skilled in the art can make improvements or changes according to the above description, and all these improvements and changes shall belong to the protection scope of the appended claims of the present application.

Claims

1. A display panel, comprising a timing control circuit and a scan driving circuit arranged in a non-display area, and a pixel unit arranged in a display area, the timing control circuit is connected to the scan driving circuit through at least one clock signal line, and is configured to output a clock signal to the scan driving circuit through the clock signal line, the scan driving circuit is configured to output a scan signal to the pixel unit through a scan line according to the clock signal, so as to control the pixel unit to receive a data signal for image display through a data line and perform image display; the display panel further comprises a temperature detection unit and an adjusting unit, the temperature detection unit is arranged in an area where the clock signal line is located, and is configured to detect a temperature of the area where the clock signal line is located and output a temperature detection signal according to a detection result, the adjusting unit is connected to the temperature detection unit, the timing control circuit and the clock signal line, and is configured to adjust a resistance value of the clock signal line according to the temperature detection signal, so as to control the temperature of the area where the clock signal line is located to be lower than a preset threshold value; the scan driving circuit comprises a plurality of scan driving units and at least one virtual scan driving unit, the virtual scan driving unit is connected to the plurality of scan driving units in sequence, the virtual scan driving unit is configured to receive the clock signal from the clock signal line, and output an enable signal to the scan driving unit connected in sequence according to the clock signal, so as to enable the scan driving unit connected in sequence to output the scan signal according to the clock signal, the virtual scan driving unit is further configured to output a virtual scan signal according to the clock signal, the temperature detection unit is arranged in the virtual scan driving unit, the virtual scan signal changes according to the temperature detected by the temperature detection unit, and the virtual scan signal is output to the adjusting unit as the temperature detection signal, wherein the virtual scan driving unit comprises a thermistor, a driving switch tube, a pull-up module and an output control node, the thermistor is the temperature detection unit, a gate of the driving switch tube is connected to the output control node, a source of the driving switch tube is connected to the clock signal line through the thermistor, and a drain of the driving switch tube is connected to the adjusting unit; the pull-up module is connected to the output control node and is configured to pull up a potential of the output control node, so as to control the driving switch tube to be turned on, and the thermistor adjusts an internal resistance value according to a detected temperature, so as to adjust a voltage of the virtual scan signal output by the thermistor. characterized in that 2.The display panel of claim 1, wherein when the thermistor detects that the temperature rises, the resistance value of the thermistor increases, so as to reduce the voltage of the virtual scan signal transmitted to the adjusting unit; and the adjusting unit comprises a control end and a first adjusting module, a second adjusting module and a third adjusting module, the control end is connected to the virtual scan driving unit and is configured to receive the virtual scan signal, and the first adjusting module, the second adjusting module and the third adjusting module are connected to the control end. ​ ​ ​ 3. The display panel of claim 2, wherein, ​ When the thermistor detects that the temperature is greater than the preset threshold, the first adjusting module, the second adjusting module and the third adjusting module are selectively connected to the clock signal line and the timing control circuit under the control of the control end, for increasing the resistance in the clock signal line.

4. The display panel of claim 3, wherein, The first adjusting module comprises a first switch tube and a first resistor, the second adjusting module comprises a second switch tube and a second resistor, and the adjusting module comprises a third switch tube and a third resistor. The first resistor, the second resistor and the third resistor are connected in series, the gate of the first switch tube is connected to the control end, and the source and the drain of the first switch tube are connected to two ends of the first resistor respectively. The gate of the second switch tube is connected to the control end, and the source and the drain of the second switch tube are connected to two ends of the second resistor respectively. The gate of the third switch tube is connected to the control end, and the source and the drain of the third switch tube are connected to two ends of the third resistor respectively. When the thermistor detects that the temperature is greater than the preset threshold and gradually increases, the first switch tube, the second switch tube and the third switch tube are sequentially turned off under the control of the control end, so as to control the first resistor to the third resistor to be sequentially connected to the clock signal line.

5. The display panel of claim 4, wherein, The first switch tube has a first threshold voltage, the second switch tube has a second threshold voltage, and the third switch tube has a third threshold voltage, the first threshold voltage is greater than the second threshold voltage, and the second threshold voltage is greater than the third threshold voltage.

6. The display panel of claim 5, wherein, When the thermistor has a first resistance value, the virtual scan driving unit outputs the virtual scan signal with a first voltage, the first voltage is greater than the first threshold voltage, the first switch tube, the second switch tube and the third switch tube are turned on, and the clock signal is transmitted to the clock signal line through the first switch tube, the second switch tube and the third switch tube; When the thermistor rises to a second resistance value, the virtual scan driving unit outputs the virtual scan signal with a second voltage, the second voltage is less than the first threshold voltage, greater than the second threshold voltage and the third threshold voltage, the first switch tube is turned off, the second switch tube and the third switch tube are turned on, and the clock signal is transmitted to the clock signal line through the first resistor, the second switch tube and the third switch tube; When the thermistor rises to a third resistance value, the virtual scan driving unit outputs the virtual scan signal with a third voltage, the third voltage is less than the second threshold voltage, greater than the third threshold voltage, the first switch tube and the second switch tube are turned off, the third switch tube is turned on, and the clock signal is transmitted to the clock signal line through the first resistor, the second resistor and the third switch tube; When the thermistor rises to a fourth resistance value, the virtual scan driving unit outputs the virtual scan signal with a fourth voltage, the fourth voltage is less than the third threshold voltage, the first switch tube, the second switch tube and the third switch tube are cut off, and the clock signal is transmitted to the clock signal line through the first resistance, the second resistance and the third resistance.

7. The display panel of claim 6, wherein, The first resistance value, the second resistance value, the third resistance value and the fourth resistance value increase in turn, and the first voltage, the second voltage, the third voltage and the fourth voltage decrease in turn.

8. A display device, characterized by comprising: The display panel comprises a power module and a display panel according to any one of claims 1-7, and the power module is used for providing driving power for image display of the display panel.

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