A driving method, a control circuit and a display device

Abstract

The application provides a driving method, a control circuit and a display device. In response to a current temperature value of a display panel being less than or equal to a first preset temperature value, a first scan driving voltage is used to overdrive a pixel circuit. In response to the current temperature value of the display panel being greater than the first preset temperature value, a third scan driving voltage is used to overdrive the pixel circuit. The voltage value of the third scan driving voltage is less than the voltage value of the first scan driving voltage. In this way, the driving capability of the pixel circuit under low temperature conditions can be ensured. A first difference between the voltage value of the second scan driving voltage and the voltage value of the first data driving voltage is equal to a second difference between the voltage value of the fourth scan driving voltage and the voltage value of the second data driving voltage. In this way, under high and low temperature conditions, at the closing moment of the scan driving voltage, the problem of pixel display abnormality caused by the uncertainty of the scan driving voltage due to the temperature compensation circuit can be avoided.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a driving method, control circuit, and display device. Background Technology

[0002] As display technology continues to develop, display devices with high resolution (such as 4K, 8K) and high refresh rate (such as 120HZ, 240HZ) are becoming more and more popular. High resolution products and high refresh rate products place increasingly higher demands on GOA (Gate Driver on Array) technology.

[0003] In some scenarios, the reduced electron mobility of amorphous silicon in TFTs at low temperatures can lead to insufficient driving capability, necessitating an increase in the VGH voltage to enhance driving performance. However, high-frequency heating is already more severe than low-frequency heating; further increasing the VGH voltage can easily result in excessively high trace temperatures, causing trace burn-in or liquid crystal polarization in the LCD panel.

[0004] In related technologies, to solve the problems of GOA driving display under high and low temperatures caused by high frequency, a temperature compensation circuit is added to the driver board. The thermistor set on the temperature compensation circuit senses the difference in ambient temperature, and finally calls different scanning driving voltages (VGH voltage) according to the thermistor value. However, the existing driving method is prone to causing pixel display abnormalities. Summary of the Invention

[0005] To address the aforementioned problems, this application provides a driving method, a control circuit, and a display device that can resolve the display abnormalities caused by using a temperature compensation circuit.

[0006] To address the aforementioned problems, the first technical solution provided in this application is: to provide a driving method, comprising:

[0007] Detect the current temperature value displayed on the panel;

[0008] In response to the current temperature value being less than or equal to a first preset temperature value, the pixel circuit is overdriven using a first scan driving voltage, and the charging unit in the pixel circuit is controlled to be in a conducting state using a second scan driving voltage, and the pixel circuit is driven using a first data driving voltage.

[0009] In response to the current temperature value being greater than the first preset temperature value, the pixel circuit is overdriven using a third scan driving voltage, and the charging unit in the pixel circuit is controlled to be in a conducting state using a fourth scan driving voltage, and the pixel circuit is driven using a second data driving voltage.

[0010] Wherein, the voltage value of the third scan driving voltage is less than the voltage value of the first scan driving voltage; there is a first difference between the voltage value of the second scan driving voltage and the voltage value of the first data driving voltage; there is a second difference between the voltage value of the fourth scan driving voltage and the voltage value of the second data driving voltage; and the first difference is equal to the second difference.

[0011] In one embodiment, the voltage value of the first data driving voltage is the same as the voltage value of the second data driving voltage;

[0012] The voltage value of the second scan driving voltage is the same as the voltage value of the fourth scan driving voltage, and both are less than the voltage value of the first scan driving voltage.

[0013] In one embodiment, the voltage values ​​of the second scan drive voltage, the third scan drive voltage, and the fourth scan drive voltage are equal.

[0014] In one embodiment, the voltage value of the first scan driving voltage is the same as the voltage value of the second scan driving voltage; the voltage value of the third scan driving voltage is the same as the voltage value of the fourth scan driving voltage.

[0015] The voltage value of the first data driving voltage is greater than the voltage value of the second data driving voltage.

[0016] In one embodiment, it further includes:

[0017] In response to the current temperature value being less than or equal to the second preset temperature value, the pixel circuit is overdriven using the fifth scanning drive voltage;

[0018] Wherein, the second preset temperature value is less than the first preset temperature value; and the voltage value of the fifth scan drive voltage is greater than the voltage value of the first scan drive voltage.

[0019] In one embodiment, it further includes:

[0020] In response to the current temperature value being greater than or equal to the third preset temperature value, the pixel circuit is overdriven using the sixth scan drive voltage;

[0021] Wherein, the third preset temperature value is greater than the first preset temperature value; and the voltage value of the sixth scan drive voltage is less than the voltage value of the third scan drive voltage.

[0022] In one embodiment, detecting the current temperature value of the display panel includes:

[0023] The current temperature value corresponding to different areas in the display panel is detected.

[0024] In one embodiment, in response to the current temperature value of the first region being less than or equal to a first preset temperature value, the pixel circuit in the first region is overdriven using the first scan driving voltage, and the conduction state of the charging unit in the first region is controlled using the second scan driving voltage; and the pixel circuit in the first region is driven using the first data driving voltage.

[0025] In response to the current temperature value of the second region being greater than the first preset temperature value, the pixel circuit in the second region is overdriven using the third scan driving voltage, and the conduction state of the charging unit in the second region is controlled using the fourth scan driving voltage; and the pixel circuit in the second region is driven using the second data driving voltage.

[0026] To solve the above problems, the second technical solution provided in this application is: to provide a control circuit, including:

[0027] Temperature detection module, used to detect the temperature on the display panel;

[0028] The timing control chip is connected to the temperature detection module;

[0029] A gate driver chip is connected to the timing control chip and the scan lines in the display panel; wherein, the timing control chip is used to output a scan drive voltage through the gate driver chip and the scan lines;

[0030] A source driver chip is connected to the timing control chip and the data lines within the display panel; wherein, the timing control chip is used to output a data driving voltage through the source driver chip and the data lines;

[0031] The timing control chip controls the gate driver chip and the source driver chip to execute any of the driving methods described above based on the current temperature value of the display panel detected by the temperature detection module.

[0032] To solve the above problems, the third technical solution provided in this application is: to provide a display device, the display device including a display panel and the control circuit described above.

[0033] The beneficial effect of this application is that, unlike the prior art, the driving method provided in this application, in response to the current temperature value of the display panel being less than or equal to a first preset temperature value, overdrives the pixel circuit using a first scanning driving voltage; in response to the current temperature value of the display panel being greater than the first preset temperature value, overdrives the pixel circuit using a third scanning driving voltage. The voltage value of the third scanning driving voltage is less than the voltage value of the first scanning driving voltage, thereby ensuring the driving capability of the pixel circuit under low-temperature conditions. Furthermore, the first difference between the voltage value of the second scanning driving voltage and the voltage value of the first data driving voltage is set to be equal to the second difference between the voltage value of the fourth scanning driving voltage and the voltage value of the second data driving voltage. Therefore, at the instant the scanning driving voltage is turned off under high and low temperatures, the coupling of the data driving voltage to the gate drive is fixed, and the problem of pixel display abnormalities caused by the uncertainty of the scanning driving voltage due to the temperature compensation circuit will not occur. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0035] Figure 1 This is a timing diagram of the driving method in the prior art;

[0036] Figure 2 A flowchart illustrating an embodiment of the driving method provided in this application;

[0037] Figure 3 A timing diagram of the driving method provided in the first embodiment of this application at low temperature;

[0038] Figure 4 A timing diagram of the driving method provided in the first embodiment of this application at high temperature;

[0039] Figure 5 Another timing diagram of the driving method provided in the first embodiment of this application at high temperature;

[0040] Figure 6 A timing diagram of the driving method provided in the second embodiment of this application at low temperature;

[0041] Figure 7 A timing diagram of the driving method provided in the second embodiment of this application at high temperature;

[0042] Figure 8 A structural block diagram of an embodiment of the control circuit provided in this application;

[0043] Figure 9 This is a structural block diagram of an embodiment of the display device provided in this application.

[0044] Label Explanation:

[0045] First scan drive voltage -VGH1; Second scan drive voltage -VGH2; Third scan drive voltage -VGH3; Fourth scan drive voltage -VGH4; First data drive voltage -D1; Second data drive voltage -D2;

[0046] Display device-1000; control circuit-100; temperature detection module-10; timing control chip-20; gate driver chip-30; source driver chip-40; scan line-L1; data line-L2; display panel-200. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0048] The terms "first," "second," and "third" used in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of those features.

[0049] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0050] The above are merely embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

[0051] To address the issues related to GOA drive display at high and low temperatures caused by high frequencies, a temperature compensation circuit is added to the driver board. The thermistor set on the temperature compensation circuit senses the difference in ambient temperature, and the resistance value of the thermistor changes with the ambient temperature. Finally, based on the thermistor value, different scanning drive voltages (VGH voltage) are applied, so that a larger scanning drive voltage is input to the GOA at low temperatures, thereby enhancing the conduction capability of the GOA and outputting a normal square wave.

[0052] like Figure 1 As shown, Figure 1 This is a timing diagram of the driving method in the prior art. When the Gate is turned off, the data driving voltage is affected by the Gate and generates a feedthrough voltage drop ΔV, where ΔV = k(VGH-VGL), and k is related to the capacitance between the Gate and the pixel. The larger VGH is, the higher the feedthrough voltage drop is, and the greater the impact on brightness. Therefore, after adding temperature compensation, the unstable VGH voltage leads to differences in display brightness.

[0053] To solve the above problems, see [link to relevant documentation]. Figures 2-7 , Figure 2 A flowchart illustrating an embodiment of the driving method provided in this application; Figure 3 A timing diagram of the driving method provided in the first embodiment of this application at low temperature; Figure 4 A timing diagram of the driving method provided in the first embodiment of this application at high temperature; Figure 5 Another timing diagram of the driving method provided in the first embodiment of this application at high temperature; Figure 6 A timing diagram of the driving method provided in the second embodiment of this application at low temperature; Figure 7 This is a timing diagram of the driving method provided in the second embodiment of this application at high temperature; this application provides a driving method, including:

[0054] Step S1: Detect the current temperature value on the display panel.

[0055] Step S2: In response to the current temperature value being less than or equal to the first preset temperature value, the pixel circuit is overdriven using the first scan driving voltage VGH1, and the charging unit in the pixel circuit is controlled to be in the conducting state using the second scan driving voltage VGH2, and the pixel circuit is driven using the first data driving voltage D1.

[0056] Step S3: In response to the current temperature value being greater than the first preset temperature value, the pixel circuit is overdriven using the third scan drive voltage VGH3, and the charging unit in the pixel circuit is controlled to be in the conducting state using the fourth scan drive voltage VGH4, and the pixel circuit is driven using the second data drive voltage D2.

[0057] Among them, the voltage value of the third scan driving voltage VGH3 is less than the voltage value of the first scan driving voltage VGH1; there is a first difference between the voltage value of the second scan driving voltage VGH2 and the voltage value of the first data driving voltage D1; there is a second difference between the voltage value of the fourth scan driving voltage VGH4 and the voltage value of the second data driving voltage D2, and the first difference is equal to the second difference.

[0058] Specifically, in this embodiment, the first preset temperature value is the boundary between the display panel being in a high temperature state and a low temperature state. A value greater than the first preset temperature value indicates that the display panel is in a high temperature state, and a value less than the first preset temperature value indicates that the display panel is in a low temperature state. Taking the general operating temperature of the display panel as -20℃ to 50℃ as an example, the first preset temperature value can be a value within the range of -7℃ to 10℃, and the specific design depends on the actual scenario.

[0059] Understandably, the driving method provided in this application, in response to the current temperature value of the display panel being less than or equal to a first preset temperature value, i.e., when the display panel is in a low-temperature state, uses a first scan driving voltage VGH1 to overdrive the pixel circuit; in response to the current temperature value of the display panel being greater than the first preset temperature value, i.e., when the display panel is in a high-temperature state, uses a third scan driving voltage VGH3 to overdrive the pixel circuit. The voltage value of the third scan driving voltage VGH3 is less than the voltage value of the first scan driving voltage VGH1. Thus, the higher voltage value of the first scan driving voltage VGH1 ensures the driving capability of the pixel circuit under low-temperature conditions. Furthermore, the first difference between the voltage value of the second scan driving voltage VGH2 and the voltage value of the first data driving voltage D1 is set to be equal to the second difference between the voltage value of the fourth scan driving voltage VGH4 and the voltage value of the second data driving voltage D2. Therefore, at the instant the scan driving voltage is turned off under high and low temperatures, the coupling of the data driving voltage to the gate drive is fixed, and there will be no pixel display abnormalities caused by the uncertainty of the scan driving voltage due to the temperature compensation circuit.

[0060] See Figures 3-5 In the first embodiment of this application, the voltage value of the first data driving voltage D1 is the same as the voltage value of the second data driving voltage D2, that is, the data driving voltage output by the device is consistent under high and low temperatures. Furthermore, to ensure that the coupling of the data driving voltage to the gate drive is fixed under high and low temperatures, the scanning driving voltage is segmented under high and low temperatures.

[0061] Specifically, in the first embodiment of this application, the voltage value of the second scan driving voltage VGH2 is the same as the voltage value of the fourth scan driving voltage VGH4, and both are less than the voltage value of the first scan driving voltage VGH1.

[0062] Understandably, with the data driving voltage fixed at high and low temperatures, setting the voltage values ​​of the second scan driving voltage VGH2 and the fourth scan driving voltage VGH4 to be the same means that the second scan driving voltage VGH2 and the fourth scan driving voltage VGH4 are not adjusted by the temperature compensation circuit. Therefore, at the moment the scan driving voltage is turned off at high and low temperatures, the coupling of the data driving voltage to the gate drive is fixed, preventing pixel display abnormalities caused by voltage instability. Furthermore, since the output second scan driving voltage VGH2 and the fourth scan driving voltage VGH4 are located in the charging phase after the overdrive phase, the second scan driving voltage VGH2 and the fourth scan driving voltage VGH4 can be lower than the first scan driving voltage VGH1. This mitigates the risk of panel temperature rise caused by excessively high scan driving voltage during the charging phase, as well as issues such as liquid crystal polarization.

[0063] Furthermore, in the first embodiment of this application, the voltage value of the third scan driving voltage VGH3 is less than the voltage value of the first scan driving voltage VGH1, and the voltage value of the third scan driving voltage VGH3 can be greater than, equal to or less than the voltage value of the second scan driving voltage VGH2 and the voltage value of the fourth scan driving voltage VGH4.

[0064] Understandably, since the third scan drive voltage VGH3 operates at a high panel temperature, compared to when the panel is at a low temperature, the overdrive stage of the panel at high temperature does not require a large scan drive voltage to meet the driving capability of the internal circuit. It can also improve the risk of panel temperature rise caused by excessively high scan drive voltage at high temperatures, as well as problems such as liquid crystal polarization.

[0065] Furthermore, since the second scan driving voltage VGH2 and the fourth scan driving voltage VGH4 are not regulated by the temperature compensation circuit, the voltage value of the third scan driving voltage VGH3 is not limited to the voltage values ​​of the second scan driving voltage VGH2 and the fourth scan driving voltage VGH4, and there will be no problem of abnormal pixel display caused by voltage instability.

[0066] To simplify data processing by the control chip, the voltage values ​​of the second scan drive voltage VGH2, the third scan drive voltage VGH3, and the fourth scan drive voltage VGH4 can be set to be equal. This allows the processing of in-circuit signals to be met without requiring a control chip with high computational power, thus saving chip costs.

[0067] Furthermore, in the first embodiment of this application, the driving method further includes: in response to the current temperature value being less than or equal to a second preset temperature value, overdriving the pixel circuit using a fifth scanning driving voltage (not shown); wherein the second preset temperature value is less than the first preset temperature value; and the voltage value of the fifth scanning driving voltage is greater than the voltage value of the first scanning driving voltage VGH1.

[0068] Taking the typical operating temperature of a display panel as -20℃ to 50℃ as an example, the first preset temperature value can be a value within the range of -7℃ to 10℃, and the second preset temperature value can be a value within the range of less than -10℃, -13℃, or -16℃. By using a fifth scan driving voltage that is greater than the first scan driving voltage VGH1 when the current temperature value is less than or equal to the second preset temperature value, the driving capability of the pixel circuit can be ensured under lower temperature conditions. It is also understandable that using different scan driving voltages to overdrive the panel in different low-temperature environments can reduce power consumption.

[0069] Furthermore, in the first embodiment of this application, the driving method further includes: in response to the current temperature value being greater than or equal to a third preset temperature value, overdriving the pixel circuit using a sixth scan driving voltage (not shown); wherein the third preset temperature value is greater than the first preset temperature value; and the voltage value of the sixth scan driving voltage is less than the voltage value of the third scan driving voltage VGH3.

[0070] Taking the typical operating temperature of a display panel as -20℃ to 50℃ as an example, the first preset temperature value can be a value within the range of -7℃ to 10℃, and the second preset temperature value can be a value greater than -20℃, 30℃, or 40℃. By using a sixth scan driving voltage that is smaller than the third scan driving voltage VGH3 when the current temperature value is greater than or equal to the third preset temperature value, power consumption can be reduced while ensuring the driving capability of the pixel circuit.

[0071] Specifically, the driving method provided in the first embodiment of this application sets the scanning driving voltage under high and low temperatures to be segmented, and the voltage value of the second scanning driving voltage VGH2 under low temperature is the same as the voltage value of the fourth scanning driving voltage VGH4 under high temperature. The second scanning driving voltage VGH2 and the fourth scanning driving voltage VGH4 are not adjusted by the temperature compensation circuit. Thus, at the moment the scanning driving voltage is turned off under high and low temperatures, the coupling of the data driving voltage to the gate drive is fixed, and there will be no problem of abnormal pixel display caused by the uncertainty of the scanning driving voltage caused by the temperature compensation circuit.

[0072] See Figure 6 and Figure 7In the second embodiment of this application, the voltage value of the first scan driving voltage VGH1 is the same as the voltage value of the second scan driving voltage VGH2; the voltage value of the third scan driving voltage VGH3 is the same as the voltage value of the fourth scan driving voltage VGH4. That is, the scan driving voltage is not segmented under high and low temperatures. In order to make the coupling of the data driving voltage to the gate drive fixed under high and low temperatures, the voltage value of the first data driving voltage D1 is set to be greater than the voltage value of the second data driving voltage D2, so that the first difference is still equal to the second difference. Thus, at the moment when the scan driving voltage is turned off under high and low temperatures, the coupling of the data driving voltage to the gate drive is fixed, and there will be no problem of abnormal pixel display caused by the uncertainty of the scan driving voltage caused by the temperature compensation circuit.

[0073] Specifically, the coupling effect of the data drive voltage varies depending on the scan drive voltage; the higher the scan drive voltage, the larger the coupling ΔV. In this embodiment, the data drive voltage can be externally controlled to follow changes in the scan drive voltage. For example, at low temperatures, the scan drive voltage VGH is high to ensure driving capability, set to VGH1; at high temperatures, VGH is lowered to improve panel temperature, set to VGH3. Through external commands linking the Driving IC and Levelshifter, when the scan drive voltage is high at VGH1, the data drive voltage corresponds to voltage D1; when the scan drive voltage is high at VGH3, the data drive voltage corresponds to voltage D2. By adjusting the values ​​of D1 and D2, the display brightness remains unchanged under different VGH values ​​at high and low temperatures.

[0074] Furthermore, in the driving method provided in the first and second embodiments of this application, step S1 further includes: detecting the current temperature value corresponding to different areas in the display panel.

[0075] Specifically, since different areas on the display panel may have different temperatures—for example, the under-display camera area and the display area may have different temperatures, different integrated components in different areas may result in different heat generation, and different heat dissipation capabilities—the current temperature values ​​corresponding to different areas of the display panel may vary. Therefore, if the display panel is driven by the same scanning drive voltage or the same data drive voltage, it may lead to uneven display in different areas, causing pixel display abnormalities. Therefore, this application detects the current temperature values ​​corresponding to different areas of the display panel, thereby enabling differentiated driving based on the current temperature values ​​of different areas and avoiding pixel display abnormalities.

[0076] Specifically, taking the scan drive voltage as an example, which only includes the first scan drive voltage VGH1, the second scan drive voltage VGH2, the third scan drive voltage VGH3, and the fourth scan drive voltage VGH4. The region where the current temperature value is less than or equal to the first preset temperature value is defined as the first region, and the region where the current temperature value is greater than the first preset temperature value is defined as the second region. There can be one or more first and second regions.

[0077] In response to the current temperature value of the first region being less than or equal to the first preset temperature value, the pixel circuit in the first region is overdriven using the first scan driving voltage VGH1, and the conduction state of the charging unit in the first region is controlled using the second scan driving voltage VGH2; and the pixel circuit in the first region is driven using the first data driving voltage D1.

[0078] In response to the current temperature value of the second region being less than the first preset temperature value, the pixel circuit in the second region is overdriven using the third scan drive voltage VGH3, and the conduction state of the charging unit in the second region is controlled using the fourth scan drive voltage VGH4; and the pixel circuit in the second region is driven using the second data drive voltage D2.

[0079] Specifically, a higher voltage first scan drive voltage VGH1 is used to overdrive several low-temperature first regions to ensure the driving capability of the pixel circuits in the low-temperature first regions. A lower voltage third scan drive voltage VGH3 is used to overdrive several high-temperature second regions to mitigate the risk of panel temperature rise caused by excessively high scan drive voltage in high-temperature regions, as well as problems such as liquid crystal polarization.

[0080] Specifically, the driving method provided in this application, in response to the current temperature value of the display panel being less than or equal to a first preset temperature value, overdrives the pixel circuit using a first scan driving voltage VGH1; in response to the current temperature value of the display panel being greater than the first preset temperature value, overdrives the pixel circuit using a third scan driving voltage VGH3. The voltage value of the third scan driving voltage VGH3 is less than the voltage value of the first scan driving voltage VGH1, thereby ensuring the driving capability of the pixel circuit under low-temperature conditions. Furthermore, the first difference between the voltage value of the second scan driving voltage VGH2 and the voltage value of the first data driving voltage D1 is set to be equal to the second difference between the voltage value of the fourth scan driving voltage VGH4 and the voltage value of the second data driving voltage D2. Therefore, at the instant the scan driving voltage is turned off under high and low temperatures, the coupling of the data driving voltage to the gate drive is fixed, preventing pixel display abnormalities caused by the uncertainty of the scan driving voltage due to the temperature compensation circuit.

[0081] See Figure 8 , Figure 8 This is a structural block diagram of an embodiment of the control circuit provided in this application. Specifically, this application also provides a control circuit 100, including a temperature detection module 10, a timing control chip 20, a gate driver chip 30, and a source driver chip 40.

[0082] The temperature detection module 10 is used to detect the temperature on the display panel. In some embodiments, the temperature detection module 10 includes a temperature sensor, such as one or more of a digital sensor, a thermistor, a resistance temperature detector, a platinum resistance thermometer, and a TFT. There may be one or more temperature detection modules 10 on the display panel, which is not limited here.

[0083] In this embodiment, timing control chip 20 is connected to temperature detection module 10; gate driver chip 30 is connected to timing control chip 20 and scan line L1 in the display panel; timing control chip 20 outputs scan drive voltage through gate driver chip 30 and scan line L1; source driver chip 40 is connected to timing control chip 20 and data line L2 in the display panel; timing control chip 20 outputs data drive voltage through source driver chip 40 and data line L2. Based on the current temperature value of the display panel detected by temperature detection module 10, timing control chip 20 controls gate driver chip 30 and source driver chip 40 to execute the driving method provided in any of the above embodiments.

[0084] Specifically, the control circuit 100 provided in this application detects the temperature on the display panel through the temperature detection module 10. Based on the current temperature value of the display panel detected by the temperature detection module 10, the timing control chip 20 outputs a higher first scan drive voltage VGH1 through the gate drive chip 30 and the scan line L1 in the connection surface at low temperatures to ensure the driving capability of the pixel circuit at low temperatures. At high temperatures, a lower third scan drive voltage VGH3 is output through the gate drive chip 30 and the scan line L1 in the connection surface to meet the driving capability of the circuit in the surface and to improve the risk of panel temperature rise caused by excessively high scan drive voltage at high temperatures, as well as problems such as liquid crystal polarization. In addition, the first difference between the voltage value of the second scan drive voltage VGH2 and the voltage value of the first data drive voltage D1 is set to be equal to the second difference between the voltage value of the fourth scan drive voltage VGH4 and the voltage value of the second data drive voltage D2. Thus, at the moment the scan drive voltage is turned off at high and low temperatures, the coupling of the data drive voltage to the gate drive is fixed, and there will be no problem of abnormal pixel display caused by the uncertainty of the scan drive voltage due to the temperature compensation circuit.

[0085] See Figure 9 , Figure 9This is a structural block diagram of an embodiment of the display device provided in this application. This application also provides a display device 1000, which can be applied to mobile phones, computers, laptops, smart wearable devices and other fields.

[0086] In some embodiments, the display device 1000 includes a display panel 200 and the control circuit 100 described above.

[0087] Specifically, the display panel 200 can be a liquid crystal display panel, an LED display panel, or a Mini-LED display panel, etc.

[0088] The above are merely embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A driving method, characterized in that, include: Detect the current temperature value displayed on the panel; In response to the current temperature value being less than or equal to a first preset temperature value, the pixel circuit is overdriven using a first scan driving voltage, and the charging unit in the pixel circuit is controlled to be in a conducting state using a second scan driving voltage, and the pixel circuit is driven using a first data driving voltage. In response to the current temperature value being greater than the first preset temperature value, the pixel circuit is overdriven using a third scan driving voltage, and the charging unit in the pixel circuit is controlled to be in a conducting state using a fourth scan driving voltage, and the pixel circuit is driven using a second data driving voltage. Wherein, the voltage value of the first scan driving voltage is greater than the voltage value of the second scan driving voltage; the voltage value of the third scan driving voltage is less than the voltage value of the first scan driving voltage; there is a first difference between the voltage value of the second scan driving voltage and the voltage value of the first data driving voltage; there is a second difference between the voltage value of the fourth scan driving voltage and the voltage value of the second data driving voltage; and the first difference is equal to the second difference.

2. The driving method according to claim 1, characterized in that, The voltage value of the first data driving voltage is the same as the voltage value of the second data driving voltage; The voltage value of the second scan driving voltage is the same as the voltage value of the fourth scan driving voltage, and both are less than the voltage value of the first scan driving voltage.

3. The driving method according to claim 2, characterized in that, The voltage values ​​of the second scan drive voltage, the third scan drive voltage, and the fourth scan drive voltage are equal.

4. The driving method according to any one of claims 1-3, characterized in that, Also includes: In response to the current temperature value being less than or equal to the second preset temperature value, the pixel circuit is overdriven using the fifth scanning drive voltage; Wherein, the second preset temperature value is less than the first preset temperature value; The voltage value of the fifth scan drive voltage is greater than the voltage value of the first scan drive voltage.

5. The driving method according to any one of claims 1-3, characterized in that, Also includes: In response to the current temperature value being greater than or equal to a third preset temperature value, the pixel circuit is overdriven using a sixth scan driving voltage; Wherein, the third preset temperature value is greater than the first preset temperature value; The voltage value of the sixth scan drive voltage is less than the voltage value of the third scan drive voltage.

6. The driving method according to claim 1, characterized in that, The current temperature value of the detection display panel includes: The current temperature value corresponding to different areas in the display panel is detected.

7. The driving method according to claim 6, characterized in that, In response to the current temperature value of the first region being less than or equal to a first preset temperature value, the pixel circuit in the first region is overdriven using the first scan driving voltage, and the conduction state of the charging unit in the first region is controlled using the second scan driving voltage. The pixel circuits within the first region are driven using the first data driving voltage. In response to the current temperature value of the second region being greater than the first preset temperature value, the pixel circuit in the second region is overdriven using the third scanning drive voltage, and the conduction state of the charging unit in the second region is controlled using the fourth scanning drive voltage. The pixel circuit in the second region is driven by the second data driving voltage.

8. A control circuit, characterized in that, include: Temperature detection module, used to detect the temperature on the display panel; The timing control chip is connected to the temperature detection module; A gate driver chip is connected to the timing control chip and the scan lines in the display panel; wherein, the timing control chip is used to output a scan drive voltage through the gate driver chip and the scan lines; A source driver chip is connected to the timing control chip and the data lines within the display panel; wherein, the timing control chip is used to output a data driving voltage through the source driver chip and the data lines; The timing control chip controls the gate driver chip and the source driver chip to execute the driving method according to any one of claims 1-7 based on the current temperature value of the display panel detected by the temperature detection module.

9. A display device, characterized in that, The display device includes a display panel and the control circuit described in claim 8.

Images