Display panel and display panel driving circuit

Abstract

The present application relates to a display panel and a driving circuit for the display panel. The driving circuit includes: a timing controller, a temperature compensation circuit, and a temperature detection circuit. The temperature detection circuit is electrically connected to the temperature compensation circuit via a switch, and the switch is also electrically connected to the timing controller. The switch between the temperature detection circuit and the temperature compensation circuit controls when the temperature compensation circuit performs temperature compensation based on a temperature detection signal from the temperature detection circuit. The switch is controlled by the timing controller to be closed during the display period of each frame of the display image and to be opened during the vertical blanking period of each frame of the display image. In this way, the temperature compensation circuit can receive the temperature detection signal from the temperature detection circuit during the vertical blanking period of the display image to perform corresponding temperature compensation, thereby avoiding temperature compensation during the display period of the display image, which may affect the normal display effect of the display panel.

Description

Technical Field

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

[0002] Because the display panel is affected by temperature, it is necessary to detect the temperature of the display panel and adjust the data signals input to each sub-pixel of the display panel based on the temperature to achieve temperature compensation. Currently, common display panels with temperature compensation generally have a temperature detection device installed on a printed circuit board (PCB) that is bonded to the display panel via a chip-on-film (COF). This temperature detection device is used to detect the temperature and then perform temperature compensation on the display panel. Once the temperature changes, the turn-on TFT voltage provided to the data chip (Gate IC) in the display panel will follow the temperature change during the temperature compensation process. However, if the TFT voltage changes too much, the array substrate row driver circuit (GDL) is prone to instantaneous excessive brightness during the scanning display period due to the large change in TFT voltage, resulting in a split-screen phenomenon with large brightness changes, affecting the normal display effect of the display panel. Summary of the Invention

[0003] The present application provides a display panel and a driving circuit for the display panel to solve the problem of instantaneous brightness split screen phenomenon caused by temperature compensation during the scanning and display process of the array substrate row driving circuit.

[0004] In the first aspect, the present application provides a driving circuit for a display panel, including a timing controller, a temperature compensation circuit, and a temperature detection circuit, characterized in that the temperature detection circuit is electrically connected to the temperature compensation circuit through a switch, and the switch is also electrically connected to the timing controller; the timing controller controls the switch to be closed during the display period of each frame of the display image, and controls the switch to be opened during the vertical blanking period of each frame of the display image.

[0005] In a second aspect, the present application provides a display panel comprising a driving circuit, a data driving circuit and a scanning driving circuit, wherein the driving circuit is electrically connected to the data driving circuit and the scanning driving circuit respectively, and is characterized in that the driving circuit comprises the driving circuit of the above-mentioned display panel.

[0006] The technical solution provided by the embodiments of the present application has the following advantages over the prior art: the driving circuit of the display panel includes a timing controller, a temperature compensation circuit, and a temperature detection circuit. The temperature detection circuit is electrically connected to the temperature compensation circuit via a switch, and the switch is also electrically connected to the timing controller. The switch between the temperature detection circuit and the temperature compensation circuit controls when the temperature compensation circuit performs temperature compensation based on the temperature detection signal of the temperature detection circuit. The switch is controlled to be closed by the timing controller during the display period of each frame of the display image and to be opened during the vertical blanking period of each frame of the display image. In this way, the temperature compensation circuit can receive the temperature detection signal of the temperature detection circuit during the vertical blanking period of the display image to perform corresponding temperature compensation. Since the temperature compensation circuit is prohibited from performing temperature compensation during the display period of the display image, the turn-on TFT voltage (VGH) provided to the data chip (Gate IC) in the display panel will not follow the temperature change due to temperature compensation, thereby avoiding the turn-on TFT voltage (VGH) provided to the data chip (Gate IC) in the display panel following the temperature change when the temperature compensation circuit performs temperature compensation during the display period of the display image, causing a momentary brightness split screen phenomenon. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0008] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0009] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0010] Figure 1 A schematic structural diagram of a display panel provided in an embodiment of the present application;

[0011] Figure 2 A schematic structural diagram of a driving circuit for a display panel provided in an embodiment of the present application;

[0012] Figure 3 A schematic structural diagram of a driving circuit for a display panel provided in an embodiment of the present application;

[0013] Figure 4A schematic structural diagram of a driving circuit for a display panel provided in an embodiment of the present application;

[0014] Figure 5 A schematic structural diagram of a driving circuit for a display panel provided in an embodiment of the present application;

[0015] Figure 6 A schematic structural diagram of a driving circuit for a display panel provided in an embodiment of the present application;

[0016] Figure 7 A schematic structural diagram of a driving circuit for a display panel provided in an embodiment of the present application;

[0017] Figure 8 This is a timing diagram of signal changes without temperature compensation provided in an embodiment of the present application;

[0018] Figure 9 A timing diagram of signal changes for temperature compensation in a display area provided in an embodiment of the present application;

[0019] Figure 10 A timing diagram of signal changes for temperature compensation in a blanking area provided in an embodiment of the present application;

[0020] Figure 11 A structural block diagram of a display device provided in an embodiment of the present application;

[0021] Among them, 100 is a display panel, 120 is a data driving circuit, 130 is a driving circuit, 131 is a timing controller, 132 is a temperature detection circuit, 133 is a switch, 134 is a temperature compensation circuit, 135 is a voltage stabilizing circuit, and 136 is a level converter. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0023] The disclosure below provides many different embodiments or examples for implementing different configurations of the present invention. To simplify the disclosure of the present invention, the components and configurations of specific examples are described below. Of course, these are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or configurations discussed.

[0024] In one embodiment, the types of display panel 100 include CRT panel, LCD panel, OLED panel, plasma panel, etc., and the display panel 100 can be mounted on any display device that requires display function, and the display device can be a desktop terminal, a mobile terminal, a television, etc. The mobile terminal can be at least one of a mobile phone, a tablet computer, a laptop computer, etc. Figure 1 As shown, the display panel 100 includes a driving circuit 130, a scanning driving circuit 110 and a data driving circuit 120, and the driving circuit 130 is electrically connected to the scanning driving circuit 110 and the data driving circuit 120 respectively. Figure 1 As shown, the scan driving circuit 110 is located on the left and right sides of the display panel 100 , and the data driving circuit 120 is located below the display panel 100 and above the driving circuit 130 .

[0025] The driving circuit 130 of the display panel 100 includes a power management chip, a timing controller 131 and a temperature detection circuit 132, and the power management chip includes a temperature compensation circuit 134, such as Figure 2 As shown, the temperature detection circuit 132 is electrically connected to the temperature compensation circuit 134 through the switch 133, and the switch 133 is also electrically connected to the timing controller 131; the timing controller 131 controls the switch 133 to be closed during the display period of each frame display image, and controls the switch 133 to be opened during the vertical blanking period of each frame display image.

[0026] Specifically, the temperature detection circuit 132 can employ a temperature sensor or an integrated circuit with temperature sensing capabilities, while the power management chip can provide temperature compensation for different types of TFT voltages. These different types of TFT voltages include pixel capacitance voltages (VGH or VGL) and liquid crystal deflection reference voltages. The pixel capacitance voltages include VGH and VGL. The VGH voltage is used to charge and turn on the TFT (Thin Film Transistor) gate capacitance and maintain the capacitance voltage for one field cycle. The VGL voltage is responsible for turning off the TFT gate. If the VGH and VGL voltages become unstable or their amplitudes change due to ambient temperature fluctuations, image display failures such as screen distortion, ghosting, and a blank screen may occur. Therefore, temperature compensation for the pixel capacitance voltage is required. The liquid crystal deflection reference voltage is the VCOM voltage, which is the reference voltage for liquid crystal molecule deflection. It is the voltage applied between the two thin film transistor layers and is required to be stable. This has a direct impact on the display panel 100. The VCOM voltage also varies for different types of display panels 100.

[0027] The constant current power supply in the power management chip provides a constant current source for the temperature detection circuit 132. This constant current source can be customized based on the actual application scenario, for example, 10μA, 20μA, or 30μA. In this embodiment, 20μA is used as the constant current source. A switch 133 is provided between the temperature detection circuit 132 and the temperature compensation circuit 134. The timing controller 131 controls the closed state of the switch 133, thereby controlling the timing of the temperature compensation circuit 134's temperature compensation operation.

[0028] The timing controller 131 is denoted as TCON. The timing controller 131 is used to control and capture the display phase of each frame displayed by the display panel 100. The timing controller 131 is also used to control the closed state of the switch 133 according to the display phase of the display driver circuit 130. The closed state of the switch 133 is used to control when the temperature compensation circuit 134 performs temperature compensation on the display panel 100.

[0029] When the display stage is the display period, the timing controller 131 controls the switch 133 to be disconnected, thereby controlling the temperature compensation circuit 134 to be unable to perform temperature compensation on the display panel 100 according to the temperature detection signal of the temperature detection circuit 132; when the display stage is the vertical blanking period, the timing controller 131 controls the switch 133 to be closed to conduct the temperature compensation circuit 134 and the temperature detection circuit 132, thereby controlling the temperature compensation circuit 134 to perform temperature compensation on the display panel 100 according to the temperature detection signal transmitted by the temperature detection circuit 132. In this way, the temperature compensation circuit 134 is controlled to receive the temperature detection signal of the temperature detection circuit 132 only during the vertical blanking period of the display image to perform corresponding temperature compensation. Since the temperature compensation circuit 134 is prohibited from performing temperature compensation during the display period of the display image, the turn-on TFT voltage (VGH) provided to the data chip (Gate IC) in the display panel 100 will not follow the temperature change due to temperature compensation, thereby avoiding the turn-on TFT voltage (VGH) provided to the data chip (Gate IC) in the display panel 100 following the temperature change when the temperature compensation circuit 134 performs temperature compensation during the display period of the display image, causing an instantaneous brightness split screen phenomenon.

[0030] In one embodiment, the switch 133 is a MOS transistor, a first end of the MOS transistor is connected to the temperature detection circuit 132, a second end of the MOS transistor is connected to the temperature compensation circuit 134, and a control end of the MOS transistor is connected to the timing controller 131; the timing controller 131 sends a compensation turn-on signal to the MOS transistor during the vertical blanking period of each frame of display image to turn on the MOS transistor; the timing controller 131 sends a compensation turn-off signal to the MOS transistor during the display period of each frame of display image to turn off the MOS transistor.

[0031] Specifically, the MOS tube is cut off and shut down when receiving the cut-off signal sent by the timing controller 131, so as to disconnect the connection between the temperature compensation circuit 134 and the temperature detection circuit 132. At this time, the temperature compensation circuit 134 cannot provide a temperature compensation voltage for the display circuit; the MOS tube is turned on when receiving the turn-on signal sent by the timing controller 131, so as to connect the connection between the temperature compensation circuit 134 and the temperature detection circuit 132. At this time, the temperature compensation circuit 134 can receive the temperature detection signal transmitted by the temperature detection circuit 132 through the MOS tube, and the temperature compensation circuit 134 performs temperature compensation on the display panel 100 according to the temperature detection signal.

[0032] like Figure 3 Q1 is a MOS transistor, the gate of Q is electrically connected to the timing controller 131 , the source of Q1 is electrically connected to the temperature detection circuit 132 , and the drain of Q1 is electrically connected to the temperature compensation circuit 134 .

[0033] Since the input impedance of the MOS tube is high, using the MOS tube as the switch 133 will not produce a voltage drop for the excitation signal and can be driven by voltage, so the driving power of the switch 133 is extremely small. In addition, the MOS tube as the switch 133 has a high sensitivity and its operating frequency can reach 100K / S to 150K / S.

[0034] In one embodiment, Figure 4 As shown, the driving circuit 130 also includes a voltage stabilizing circuit 135, and the connection point between the switch 133 and the temperature compensation circuit 134 is also connected to the voltage stabilizing circuit 135; the voltage stabilizing circuit 135 provides a reserved voltage for the temperature compensation circuit 134 when the switch 133 is closed, and the reserved voltage is the detection voltage obtained by the voltage stabilizing circuit 135 from the temperature detection circuit 132 in the previous frame before the connection between the temperature detection circuit 132 and the temperature compensation circuit 134 is disconnected.

[0035] Specifically, when the switch 133 is disconnected, a reserved voltage is provided to the temperature compensation circuit 134 through the voltage stabilizing circuit 135, and the reserved voltage is the detection voltage that the temperature detection circuit 132 transmits to the voltage stabilizing circuit 135 through the switch 133 in the previous frame before the switch 133 is disconnected. Therefore, after the switch 133 is disconnected, the temperature compensation circuit 134 continues to output stably using the reserved voltage, that is, the voltage stabilizing circuit 135 is used to maintain the voltage at the connection node between the temperature compensation circuit 134 and the switch 133 after the switch 133 is turned off, and is used to maintain the output voltage of the temperature compensation circuit 134, so as to ensure the stability of the output voltage of the temperature compensation circuit 134 when the switch 133 is disconnected.

[0036] In one embodiment, the voltage stabilizing circuit 135 includes a capacitor, one end of which is connected to the connection point between the switch 133 and the temperature compensation circuit 134, and the other end of the capacitor is grounded; the capacitor is charged by the temperature detection circuit 132 during the vertical blanking period of the previous frame, and the capacitor discharges the temperature compensation circuit 134 during the display period of the current frame to provide the reserved voltage to the temperature compensation circuit 134.

[0037] Specifically, such as Figure 5 As shown, C1 indicates a capacitor, QT1 is used to indicate a connection node on the line between the temperature compensation circuit 134 and the switch 133, VGH_VT is used to indicate a third preset pin, VT is used to indicate a first preset pin, and Figure 5 Only the temperature compensation circuit 134 is used as an example to illustrate the temperature compensation of the VGH voltage. When the temperature compensation circuit 134 performs temperature compensation for the VGL voltage or the VCOM voltage, the pin identifiers will be adjusted accordingly according to the temperature compensation voltage type. However, the connection relationship between the various components is as follows. Figure 5 C1 is connected between the QT1 connection node and the ground pin. The capacitor is used to provide the temperature compensation circuit 134 with the detection voltage sent by the temperature detection circuit 132 before Q1 is turned off, thereby maintaining the output voltage of the temperature compensation circuit 134.

[0038] In one embodiment, the temperature detection circuit 132 includes a first resistor, a second resistor, and a thermistor. The thermistor and the first resistor are connected in parallel. One end of the thermistor and the first resistor connected in parallel is connected to the temperature compensation circuit 134, and the other end is connected to the second resistor. The other end of the second resistor is grounded.

[0039] Specifically, the temperature detection circuit 132 is formed by connecting a thermistor and a first resistor in parallel and then connecting a second resistor in series to ground. Figure 6 As shown, RNTC indicates a thermistor, R1 indicates a first resistor, and R2 indicates a second resistor. Since the resistance of the thermistor changes due to the influence of the ambient temperature, under a given constant current source, the resistance of the thermistor changes with the ambient temperature, causing the detection voltage at the first preset pin to change accordingly. Therefore, the corresponding ambient temperature can be indicated according to the detection voltage at the first pin. The temperature detection circuit 132 has a simple structure and the purchase cost of the components is low.

[0040] In one embodiment, the driving circuit 130 further includes a level converter 136, which is connected to the timing controller 131 and the temperature compensation circuit 134 respectively. The level converter 136 boosts and shifts the gate-on voltage signal output by the temperature compensation circuit 134 and transmits it to the display panel 100.

[0041] Specifically, such as Figure 7 As shown, when the voltage type for which the temperature compensation circuit 134 performs temperature compensation is the pixel capacitance voltage (VGH voltage or VGL voltage), the gate-on voltage signal output by the temperature compensation circuit 134 needs to be boosted and shifted by the level converter 136 before being transmitted to the display panel 100. That is, the display panel 100 cannot directly use the gate-on voltage signal corresponding to the pixel capacitance voltage. Figure 2 As shown, when the voltage type for which the temperature compensation circuit 134 performs temperature compensation is the liquid crystal deflection reference voltage (VCOM voltage), there is no need to convert the voltage signal corresponding to this voltage type and it can be directly transmitted to the display panel 100. That is, the connection between the power management chip and the display panel 100 is a direct connection or an indirect connection for different types of voltage signals, thereby ensuring that an appropriate voltage signal is provided to the display panel 100. The gate-on voltage signal is used to indicate the signal corresponding to the temperature compensation voltage.

[0042] In one embodiment, when the timing controller 131 detects that the enable driving voltage corresponding to the current frame display picture of the display panel 100 is zero, it determines that the current frame display picture is in the vertical blanking period; when it detects that the enable driving voltage corresponding to the current frame display picture is greater than zero, it determines that the current frame display picture is in the display period.

[0043] Specifically, the timing controller 131 determines whether the display phase of the display image is the display period or the vertical blanking period by detecting the enable drive voltage of the display panel 100 during each frame display. The enable drive voltage is used to drive the display image to display normally, and is recorded as CK_OUT. Therefore, when the enable drive voltage corresponding to the current frame display image is zero, the current frame display image cannot be driven for display, and thus the current frame display image is determined to be in the vertical blanking period. When the enable drive voltage corresponding to the current frame display image is not zero, the current frame display image can be driven for display normally, and thus the current frame display image is determined to be in the display period. The display phase of each frame display image of the display panel 100 can be quickly determined by the enable drive voltage.

[0044] When the display stage of the display image is the display period, the clock signal corresponding to the enable driving voltage of the display panel 100 changes in a rectangular wave; when the display stage of the display image is the vertical blanking period, the clock signal corresponding to the enable driving voltage of the display panel 100 is a low-level signal, such as Figure 8 Taking the VGH voltage as an example, CK_OUT1 and CK_OUT2 are used to indicate the clock signal of the display panel 100, and STV_OUT is used to indicate the start vertical signal (Start Vertical, hereinafter referred to as STV). VGH is described as 30V. Figure 8 VGH does not change, that is, it is not temperature compensated.

[0045] Reference Figure 9 , VGH_VT is the output voltage of the temperature compensation circuit 134. When VGH_VT changes from 30V to 36V, it means that the temperature compensation circuit 134 performs temperature compensation for the VGH voltage. However, at this time, the temperature compensation occurs in the enable stage of CK_OUT1 and CK_OUT2, that is, the clock signals of CK_OUT1 and CK_OUT2 are rectangular waves. At this time, the display stage of the display driving circuit 130 is the display period. Performing temperature compensation in this stage will cause brightness split screen or picture abnormality. Therefore, to avoid this phenomenon, the timing controller 131 outputs a cut-off signal to the switch 133 during the display period of the display screen to turn off the switch 133, disconnect the connection between the temperature compensation circuit 134 and the temperature detection circuit 132, and prohibit the temperature compensation circuit 134 from performing temperature compensation processing.

[0046] When the display image is in the vertical blanking period, the timing controller 131 Figure 10 As shown, when the signals of CK_OUT1 and CK_OUT2 are low-level signals, a conduction signal is output to the switch 133 to turn on the switch 133, thereby establishing a connection between the temperature compensation circuit 134 and the temperature detection circuit 132, so that the temperature compensation circuit 134 can output a corresponding temperature compensation voltage according to the detection voltage transmitted by the temperature detection circuit 132.

[0047] Reference Figure 10LOCK_VT is used to indicate the control signal sent by the timing controller 131 to the switch 133. When the signals of CK_OUT1 and CK_OUT2 are rectangular waves, that is, when the display stage of the display screen is the display period, LOCK_VT is a low-level cut-off signal; when the signals of CK_OUT1 and CK_OUT2 are low-level signals, that is, when the display stage of the display screen is the vertical blanking period, LOCK_VT is a high-level conduction signal. The corresponding area when LOCK_VT is a high-level signal is the vertical blanking area, corresponding to the vertical blanking period, which can also be called the vertical blanking stage. During this stage, the VGH voltage is temperature compensated, so that VGH_VT changes from 30V to 36V. Since the temperature compensation occurs in the vertical blanking stage and does not affect the signals of CK_OUT1 and CK_OUT2, it can be avoided that the temperature compensation is performed when the display screen is in the display period and affects the normal display effect of the display screen. That is, when the display stage of the display image is the display period, no matter whether the VGH voltage is affected by the ambient temperature and changes, it will not be temperature compensated. Only when the display stage of the display image is the vertical blanking period, the temperature compensation circuit 134 will be started to perform temperature compensation on the voltage to be compensated. The voltage to be compensated includes the above-mentioned pixel capacitance voltage and the liquid crystal deflection reference voltage.

[0048] In one embodiment, when the temperature detection circuit 132 detects that the detection voltage is within a preset voltage range for N consecutive times, the timing controller 131 continuously sends a conduction signal to the switch 133 for each frame display image within a specified time period to control the switch 133 to be in a normally closed state within the specified time period.

[0049] Specifically, when the temperature detection circuit 132 detects that the detection voltage falls within the preset voltage range N times in a row, the timing controller 131 indicates that the ambient temperature of the temperature detection circuit 132 is constant within the temperature range corresponding to the preset voltage range. N is any positive integer and can be customized according to the actual application scenario. In order to stably perform temperature compensation on the display screen, the timing controller 131 continuously sends a conduction signal to the switch 133 for a specified time period to control the switch 133 to be in a normally closed state for the specified time period. The temperature compensation circuit 134 can continuously receive the detection voltage sent by the temperature detection circuit 132 and use the detection voltage to perform temperature compensation on the display screen, thereby achieving stable temperature compensation on the display screen for the specified time period. The preset voltage range and the specified time period can be customized according to the actual application scenario. After the specified time period ends, the closed state of the switch 133 is dynamically controlled according to the display stage of each frame of the display screen, thereby controlling the temperature compensation state of the display screen by the temperature compensation circuit 134.

[0050] In one embodiment, when the detection voltage output by the temperature detection circuit 132 is lower than the first threshold and the difference between the detection voltage and the second threshold is smaller than a preset difference, the timing controller 131 continuously sends a conduction signal to the switch 133 for each frame of display within a specified time period, so as to control the switch 133 to be in a normally closed state within the specified time period, and the second threshold is smaller than the first threshold;

[0051] When the detection voltage output by the temperature detection circuit 132 is greater than the third threshold, the timing controller 131 continuously sends a cutoff signal to the switch 133 for each frame display image within a specified time period to control the switch 133 to be in a normally open state within the specified time period, and the third threshold is greater than the first threshold.

[0052] Specifically, the detection voltage output by the temperature detection circuit 132 is used to indicate the detected temperature. If the detection voltage is lower than a first threshold, it indicates that the detected temperature is lower than the corresponding first preset temperature. If the second threshold is lower than the first threshold, and the difference between the detection voltage and the second threshold is less than the preset difference, it indicates that the detected temperature fluctuates slightly around the second preset temperature corresponding to the second threshold. The first threshold, the second threshold, and the preset difference can be customized according to actual application scenarios. A smaller preset difference indicates a smaller fluctuation range between the detected temperature and the second preset temperature corresponding to the second threshold, while a larger preset difference indicates a larger fluctuation range between the detected temperature and the second preset temperature. When the detected temperature is lower than the first threshold and the difference between the detected temperature and the second threshold is less than the preset difference, it indicates that the ambient temperature is at a low temperature and fluctuates slightly. At this time, the fluctuation range of the compensated VGH voltage is small, which has little impact on the brightness splitting of the display screen. Therefore, temperature compensation can be performed during the display period of the display screen to ensure the temperature compensation effect of the VGH voltage during the display period of the display screen in a low temperature environment, thereby improving the display effect of the display panel 100 during the display period of the display screen in a low temperature environment.

[0053] The third threshold is greater than the first threshold, and the detection voltage output by the temperature detection circuit 132 is greater than the third threshold, indicating that the detection temperature corresponding to the detection voltage is higher than the third preset temperature corresponding to the third threshold. At this time, the ambient temperature is at a high temperature, and the VGH voltage in the high temperature environment is sufficient to drive the display panel 100 to display the picture, so no temperature compensation is required at this time. The timing controller 131 controls the switch 133 to be in a normally open state within a specified time period, and prohibits the temperature compensation circuit 134 from performing temperature compensation when the ambient temperature is high. This can avoid the temperature compensation circuit 134 from generating heat due to temperature compensation, thereby reducing the overall operating temperature of the driving circuit 130. By reducing the overall operating circuit of the driving circuit 130, the display effect of the display panel 100 in a high temperature environment is ensured.

[0054] like Figure 11As shown, an embodiment of the present application provides a display device, including a processor 711, a communication interface 712, a memory 713 and a communication bus 714, wherein the processor 711, the communication interface 712, and the memory 713 communicate with each other through the communication bus 714;

[0055] Memory 713, for storing computer programs;

[0056] In one embodiment of the present application, the processor 711 is configured to implement the driving circuit of the display panel provided by any one of the aforementioned method embodiments when executing the program stored in the memory 713 .

[0057] Those skilled in the art will understand that Figure 11 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0058] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the driving circuit of the display panel provided in any of the aforementioned method embodiments are implemented.

[0059] The display panel embodiment described above is merely illustrative, wherein the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of this embodiment.

[0060] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a general hardware platform, or of course, by hardware. Based on this understanding, the above technical solution, in essence, or the part that contributes to the relevant technology, can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiment.

[0061] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0062] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is intended to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A driving circuit for a display panel, comprising a timing controller, a temperature compensation circuit, and a temperature detection circuit, characterized in that: The temperature detection circuit is electrically connected to the temperature compensation circuit via a switch, and the switch is also electrically connected to the timing controller; the timing controller controls the switch to be closed during the display period of each frame of the display image, and controls the switch to be opened during the vertical blanking period of each frame of the display image; The switch is a MOS transistor, a first end of the MOS transistor is connected to the temperature detection circuit, a second end of the MOS transistor is connected to the temperature compensation circuit, and a control end of the MOS transistor is connected to the timing controller; the timing controller sends a compensation turn-on signal to the MOS transistor during the vertical blanking period of each frame of display image to turn on the MOS transistor; the timing controller sends a compensation turn-off signal to the MOS transistor during the display period of each frame of display image to turn off the MOS transistor.

2. The driving circuit of the display panel according to claim 1, wherein: It also includes a voltage stabilizing circuit, and the connection point between the switch and the temperature compensation circuit is also connected to the voltage stabilizing circuit; the voltage stabilizing circuit provides a reserved voltage for the temperature compensation circuit when the switch is closed, and the reserved voltage is the detection voltage obtained by the voltage stabilizing circuit from the temperature detection circuit in the previous frame before the connection between the temperature detection circuit and the temperature compensation circuit is disconnected.

3. The driving circuit of the display panel according to claim 2, wherein: The voltage stabilizing circuit includes a capacitor, one end of which is connected to the connection point between the switch and the temperature compensation circuit, and the other end of the capacitor is grounded; the capacitor is charged by the temperature detection circuit during the vertical blanking period of the previous frame, and the capacitor discharges the temperature compensation circuit during the display period of the current frame to provide the reserved voltage to the temperature compensation circuit.

4. The driving circuit of the display panel according to claim 1, wherein: The temperature detection circuit includes a first resistor, a second resistor and a thermistor. The thermistor and the first resistor are connected in parallel. One end of the thermistor and the first resistor connected in parallel is connected to the temperature compensation circuit, and the other end is connected to the second resistor. The other end of the second resistor is grounded.

5. The driving circuit of the display panel according to claim 1, wherein: It also includes a level converter, which is connected to the timing controller and the temperature compensation circuit respectively. The level converter performs boosting and shifting processing on the gate-on voltage signal output by the temperature compensation circuit and then transmits it to the display panel.

6. The driving circuit of the display panel according to claim 1, wherein: When the timing controller detects that the enable driving voltage corresponding to the current frame display picture of the display panel is zero, it determines that the current frame display picture is in the vertical blanking period; when it detects that the enable driving voltage corresponding to the current frame display picture is greater than zero, it determines that the current frame display picture is in the display period.

7. The driving circuit of the display panel according to claim 1, wherein: When the temperature detection circuit detects that the detection voltage is within a preset voltage range for N consecutive times, the timing controller continuously sends a compensation conduction signal to the switch in each frame display image within a specified time length to control the switch to be in a normally closed state within the specified time length.

8. The driving circuit of the display panel according to claim 1, wherein: When the detection voltage output by the temperature detection circuit is lower than the first threshold and the difference between the detection voltage and the second threshold is smaller than the preset difference, the timing controller continuously sends a conduction signal to the switch during each frame of the display image within a specified time period, so as to control the switch to be in a normally closed state for the specified time period, and the second threshold is smaller than the first threshold; When the detection voltage output by the temperature detection circuit is greater than a third threshold, the timing controller continuously sends a cutoff signal to the switch in each frame display image within a specified time length to control the switch to be in a normally open state within the specified time length, and the third threshold is greater than the first threshold.

9. A display panel comprising a driving circuit, a data driving circuit and a scanning driving circuit, wherein the driving circuit is electrically connected to the data driving circuit and the scanning driving circuit respectively, characterized in that: The driving circuit includes the driving circuit of the display panel according to any one of claims 1-8.

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