Gate drive circuit, display drive device and display device

Abstract

The present application relates to a gate driving circuit, a display driving device and a display device, wherein a control end of a target driving module is electrically connected to an output end of a temperature control module, a first end of the target driving module is electrically connected to a clock signal end of the gate driving module, and a second end of the target driving module is electrically connected to an output end of the gate driving module, so that the temperature control module is used to transmit a potential signal of a control node of the gate driving module to the control end of the target driving module under the control of the temperature control signal end, and the target driving module is used to output a target driving signal to the output end of the gate driving module according to a clock signal provided by a clock signal end under the potential control of the control end of the target driving module, so as to improve the driving capability of the gate driving circuit, solve the problem caused by enhancing the driving capability of the gate driving circuit by increasing the power supply voltage in the existing related technology, and improve the circuit safety.

Description

Technical Field

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

[0002] LCD (Liquid Crystal Display) is a flat display technology widely used in electronic devices. With the rapid development of fields such as computers and mobile communications, the demand for thin, low-power and high-resolution displays is growing, and LCD has rapidly emerged as an ideal display technology.

[0003] In LCD, GDL (Gate Driver IC) plays a very important role. The GDL circuit is mainly responsible for controlling the gate of each pixel on the LCD panel to achieve row-by-row gating of the pixels, so the performance of the GDL circuit directly affects the display effect and performance of the LCD. High-quality GDL circuits can ensure that the LCD has good picture quality, high refresh rate and low power consumption, thereby improving the user experience. Therefore, in LCD design, the optimization and selection of the GDL circuit is very important, which is directly related to the overall performance and competitiveness of the display.

[0004] As the demand for high resolution and high refresh rate of existing electronic products continues to increase, GDL circuits face greater challenges. In particular, under low temperature conditions, the GDL driving capability will drop significantly, resulting in display abnormalities. Currently, the main way to enhance the GDL driving capability is to increase the input voltage, but this method has certain limitations. For example, excessive input voltage may cause component breakdown, which may lead to circuit safety issues caused by component breakdown. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides a gate driving circuit, a display driving device and a display device.

[0006] In a first aspect, the present application provides a gate driving circuit, including: a gate driving module, a temperature control module and a target driving module;

[0007] The control end of the target driving module is electrically connected to the output end of the temperature control module, the first end of the target driving module is electrically connected to the clock signal end of the gate driving module, and the second end of the target driving module is electrically connected to the output end of the gate driving module;

[0008] The temperature control module is used to transmit the potential signal of the control node of the gate driving module to the control end of the target driving module under the control of the temperature control signal end;

[0009] The target driving module is used to output a target driving signal to the output end of the gate driving module according to the clock signal provided by the clock signal end under the potential control of the control end of the target driving module.

[0010] Optionally, the temperature control module includes a first control transistor and a second control transistor;

[0011] The first end of the first control transistor is electrically connected to the temperature control signal end, the second end of the first control transistor is electrically connected to the control end of the second control transistor, the first end of the second control transistor is electrically connected to the control node of the gate driving module, and the second end of the second control transistor is electrically connected to the control end of the target driving module;

[0012] The first control transistor is used to transmit the temperature control signal provided by the temperature control signal terminal to the control terminal of the second control transistor under the control of the first pixel scanning signal terminal;

[0013] The second control transistor is used to transmit the potential signal of the control node to the control end of the target driving module according to the temperature control signal.

[0014] Optionally, the temperature control module further includes a first capacitor and a second capacitor;

[0015] The first end of the first capacitor is electrically connected to the control end of the second control transistor, the second end of the first capacitor is electrically connected to the second end of the second control transistor, the first end of the second capacitor is electrically connected to the second end of the second control transistor, and the second end of the second capacitor is electrically connected to the second end of the target drive module.

[0016] Optionally, the target driving module includes a compensation driving transistor;

[0017] The control end of the compensation driving transistor is electrically connected to the output end of the temperature control module, the first end of the compensation driving transistor is electrically connected to the clock signal end of the gate driving module, and the second end of the compensation driving transistor is electrically connected to the output end of the gate driving module;

[0018] The compensation driving transistor is used to output the target driving signal according to the clock signal provided by the clock signal terminal under the potential control of the control terminal of the compensation driving transistor.

[0019] Optionally, the gate driving module includes: a first transistor, a second transistor, a fourth transistor, a gate driving transistor, an eighth transistor and a third capacitor, and the control node is a node where the second end of the first transistor is connected to the control end of the gate driving transistor and the first end of the third capacitor;

[0020] Among them, the first end of the first transistor is electrically connected to the control end of the first transistor and the control end of the fourth transistor, the control end of the second transistor is electrically connected to the first power supply end, the first end of the second transistor is electrically connected to the control end of the second transistor and the first power supply end, the second end of the second transistor is electrically connected to the first end of the fourth transistor, the second end of the fourth transistor is electrically connected to the second end of the eighth transistor and the second power supply end, the first end of the gate driving transistor is electrically connected to the first end of the target driving module, the second end of the gate driving transistor is electrically connected to the second end of the target driving module, the first end of the eighth transistor is electrically connected to the control node, and the second end of the third capacitor is electrically connected to the second end of the gate driving transistor.

[0021] Optionally, the gate driving module further includes: a third transistor, a fifth transistor and a seventh transistor;

[0022] The first end of the third transistor is electrically connected to the second end of the first transistor, the second end of the third transistor is electrically connected to the second power supply terminal, the control end of the third transistor is electrically connected to the first end of the fourth transistor, the first end of the fifth transistor and the control end of the seventh transistor, the control end of the fifth transistor is electrically connected to the control node, the second end of the fifth transistor is electrically connected to the second power supply terminal, the first end of the seventh transistor is electrically connected to the second end of the gate drive transistor, and the second end of the seventh transistor is electrically connected to the second power supply terminal.

[0023] In a second aspect, a display driving device is provided, comprising: N cascaded gate driving circuit units, and each of the gate driving circuit units is a gate driving circuit as described in any one of the first aspects, wherein N is an integer greater than 1.

[0024] Optionally, it also includes a temperature signal generating circuit;

[0025] The first input end of the temperature signal generating circuit is electrically connected to the output end of the preset temperature compensation circuit, the second input end of the temperature signal generating circuit is electrically connected to the preset fixed power input end, and the output end of the temperature signal generating circuit is electrically connected to the temperature control signal end of the temperature control module;

[0026] The temperature signal generating circuit is used to output a temperature control signal to the temperature control signal terminal of the temperature signal generating circuit under the control of the first input terminal of the temperature signal generating circuit and the second input terminal of the temperature signal generating circuit.

[0027] Optionally, the temperature signal generating circuit includes a comparator unit;

[0028] The non-inverting input terminal of the comparator unit is electrically connected to the output terminal of the preset temperature compensation circuit as the first input terminal of the temperature signal generating circuit, the inverting input terminal of the comparator unit is electrically connected to the preset fixed power input terminal as the second input terminal of the temperature signal generating circuit, the positive power input terminal of the comparator unit is electrically connected to the first power terminal, the negative power input terminal of the comparator unit is electrically connected to the second power terminal, and the output terminal of the comparator unit is electrically connected to the temperature control signal terminal of the temperature control module as the output terminal of the temperature signal generating circuit.

[0029] In a third aspect, a display device is provided, comprising: a gate driving circuit as described in any one of the first aspects and a power supply module, wherein the power supply module is used to control the power supply to the gate driving circuit.

[0030] The gate driving module, temperature control module and target driving module provided in the embodiments of the present application are electrically connected to the output end of the temperature control module through the control end of the target driving module, the first end of the target driving module is electrically connected to the clock signal end of the gate driving module, and the second end of the target driving module is electrically connected to the output end of the gate driving module, so that the temperature control module is used to transmit the potential signal of the control node of the gate driving module to the control end of the target driving module under the control of the temperature control signal end, and the target driving module is used to output the target driving signal to the output end of the gate driving module according to the clock signal provided by the clock signal end under the potential control of the control end of the target driving module, so as to improve the driving capability of the gate driving circuit, solve the problem caused by enhancing the driving capability of the gate driving circuit by increasing the power supply voltage in the existing related technology, and improve the circuit safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] 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.

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0033] Figure 1 A schematic diagram of a circuit structure of a gate drive circuit provided in an embodiment of the present application;

[0034] Figure 2 A schematic diagram of the circuit structure of a temperature control module of a gate drive circuit provided in an embodiment of the present application;

[0035] Figure 3 A schematic diagram of a temperature control signal Qc provided in an embodiment of the present application;

[0036] Figure 4 A schematic diagram of the structure of a display driving device provided in an embodiment of the present application;

[0037] Figure 5 A schematic diagram of the structure of a display driving device provided in another embodiment of the present application;

[0038] Figure 6 A schematic diagram of a comparator unit circuit provided in an embodiment of the present application;

[0039] Figure 7 A schematic diagram of the structure of a display device provided in an embodiment of the present application.

[0040] Wherein, Gout(N-4) is the second pixel scanning signal terminal, Gout(N+4) is the third pixel scanning signal terminal, Gout(N) is the first pixel scanning signal terminal, CLK(N) is the clock signal terminal, VDD is the first power supply terminal, VSS is the second power supply terminal, Q is the control node, Qc is the temperature control signal terminal, T2Q is the first control transistor, T6Q is the first control transistor, T6-2 is the compensation drive transistor, T6-1 is the gate drive transistor, C1 is the first capacitor, C2 is the second capacitor, and C3 is the first Three capacitors, T1 is the first transistor, T2 is the second transistor, T3 is the third transistor, T4 is the fourth transistor, T5 is the fifth transistor, T7 is the seventh transistor, T8 is the eighth transistor, VGH (+IN) is the non-inverting input terminal, 30V (-IN) is the inverting input terminal, 100 is the gate driving circuit, 11 is the gate driving module, 12 is the temperature control module, 13 is the target driving module, 410 is the display driving device, 411 is the temperature signal generating circuit, 710 is the display device, and 711 is the power supply module. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0042] The GDL circuit is mainly controlled by a thin film transistor (TFT). The working principle of TFT is to use electron migration to achieve the effect of displaying different brightness, and temperature will affect the performance of TFT. For example, when the temperature is low, the electron mobility of TFT will decrease. That is, under the same input voltage, when TFT is used as the driving transistor in the GDL circuit, the driving current of the driving transistor decreases as the temperature decreases, affecting the driving ability of the GDL circuit under low temperature conditions. There is a problem of low low-temperature driving ability of the GDL circuit.

[0043] In order to solve the problem of low low-temperature driving capability of the GDL circuit, the embodiments of the present application provide a gate driving circuit, a display driving device and a display device, wherein the control end of the target driving module is electrically connected to the output end of the temperature control module, the first end of the target driving module is electrically connected to the clock signal end of the gate driving module, and the second end of the target driving module is electrically connected to the output end of the gate driving module, so that the temperature control module is used to transmit the potential signal of the control node of the gate driving module to the control end of the target driving module under the control of the temperature control signal end, and the target driving module is used to output the target driving signal to the output end of the gate driving module according to the clock signal provided by the clock signal end under the potential control of the control end of the target driving module, so as to utilize the target driving signal output by the target driving module to improve the driving capability of the gate driving circuit, that is, the normal operation of the GDL circuit can be maintained under low temperature conditions without increasing the input voltage, which solves the problem caused by enhancing the driving capability of the gate driving circuit by increasing the power supply voltage in the existing related technology, and improves the circuit safety.

[0044] Figure 1 A schematic diagram of the structure of a gate drive circuit provided in an embodiment of the present application.

[0045] like Figure 1As shown, the present application discloses an embodiment, providing a gate driving circuit 100, including: a gate driving module 11, a temperature control module 12 and a target driving module 13; the control end of the target driving module 13 is electrically connected to the output end of the temperature control module 12, the first end of the target driving module 13 is electrically connected to the clock signal end of the gate driving module 11, and the second end of the target driving module 13 is electrically connected to the output end of the gate driving module 11; the temperature control module 12 is used to transmit the potential signal of the control node of the gate driving module 11 to the control end of the target driving module 13 under the control of the temperature control signal end; the target driving module 13 is used to output the target driving signal to the output end of the gate driving module 11 according to the clock signal provided by the clock signal end under the potential control of the control end of the target driving module 13.

[0046] Specifically, the temperature control module 12 in this embodiment can receive the temperature control signal through the temperature control signal terminal Qc, thereby transmitting the potential signal of the control node Q of the gate driving module 11 to the control end of the target driving module 13 according to the temperature control signal, so that the target driving module 13 can output the target driving signal to the output end of the gate driving module 11 based on the potential signal of the control node Q in combination with the clock signal provided by the clock signal terminal, and the gate driving module 11 itself can output the gate driving signal according to the potential signal of the control node Q, so that the target driving module 13 and the gate driving module 11 can jointly output the target driving signal and the gate driving signal through the output end of the gate driving module 11, that is, the signal after the target driving signal and the gate driving signal are combined is used as the pixel scanning driving signal Gout(N) output by the current gate driving circuit 100, so as to achieve the purpose of jointly driving the pixel scanning by the target driving signal and the gate driving signal. It should be noted that in the present application, Gout represents a pixel scanning drive signal, Gout(N) represents a pixel scanning drive signal output by the current gate drive circuit 100, Gout(N+1) represents a pixel scanning drive signal output by the next gate drive circuit 100, Gout(N-1) represents a pixel scanning drive signal output by the previous gate drive circuit 100, and so on, which will not be repeated here one by one.

[0047] In one example, the temperature control signal can be a high level or a low level. The high level can be used to indicate that the current ambient temperature is lower than a preset temperature threshold, or the low level can be used to indicate that the current ambient temperature is higher than the preset temperature threshold. That is, after the temperature control module 12 receives the temperature control signal through the temperature control signal terminal, it can determine whether to transmit the potential signal of the control node of the gate driving module 11 to the control terminal of the target driving module 13 according to the level of the temperature control signal. For example, when the temperature control signal is at a low level, it is not necessary to transmit the potential signal of the control node of the gate driving module 11 to the control terminal of the target driving module 13. Figure 1 As shown, at this time, the target driving module 13 is in a closed state and does not output the target driving signal. The gate driving module 11 outputs the gate driving signal to achieve the function of driving pixel scanning. When the temperature condition is low, the gate driving signal cannot meet the demand of driving pixel scanning. At this time, the temperature control module 12 receives a high-level temperature control signal, and can transmit the potential signal of the control node of the gate driving module 11 to the control end of the target driving module 13, such as Figure 1 As shown, at this time, the target driving module 13 is in the on state and does not output the target driving signal, so that the target driving signal and the gate driving signal can be output together to drive the pixel scanning.

[0048] In this embodiment, the temperature control module 12 can turn on the target driving module 13 under low temperature conditions, and turn off the target driving module 13 when the low temperature conditions do not exist. The target driving module 13 plays a role in driving pixel scanning together with the gate driving module 11 under low temperature conditions; thereby solving the problem caused by enhancing the driving ability of the gate driving circuit by increasing the power supply voltage in the existing related technology. In this embodiment, through the settings of the temperature control module 12 and the target driving module 13, the target driving module 13 can be turned on under low temperature conditions to output the target driving signal to the output end of the gate driving module 11, so as to achieve the purpose of driving the pixel scanning together with the gate driving signal, and the driving signal for driving the pixel scanning is enhanced without increasing the input voltage, thereby improving the circuit safety.

[0049] like Figure 2 As shown, in an optional implementation of the present application, the temperature control module 12 includes a first control transistor T2Q and a second control transistor T6Q; the first end of the first control transistor T2Q is electrically connected to the temperature control signal end, the second end of the first control transistor T2Q is electrically connected to the control end of the second control transistor T6Q, the first end of the second control transistor T6Q is electrically connected to the control node of the gate driving module 11, and the second end of the second control transistor T6Q is electrically connected to the control end of the target driving module 13; the first control transistor T2Q is used to transmit the temperature control signal provided by the temperature control signal end to the control end of the second control transistor T6Q under the control of the first pixel scanning signal end; the second control transistor T6Q is used to transmit the potential signal of the control node to the control end of the target driving module 13 according to the temperature control signal.

[0050] In this embodiment, when the first control transistor T2Q and the second control transistor T6Q are both TFTs, the first control transistor T2Q receives the first pixel scanning signal Gout(n-8) through the first pixel scanning signal terminal. When the first control transistor T2Q receives the first pixel scanning signal Gout(n-8), the first control transistor T2Q is turned on and transmits the temperature control signal Qc provided by the temperature control signal terminal to the control terminal of the second control transistor T6Q, so that the voltage of the control terminal of the second control transistor T6Q is equal to the voltage of the temperature control signal Qc. At this time, if the ambient temperature is not at a low temperature, If the ambient temperature is high or room temperature, the temperature control signal Qc is a low voltage and the second control transistor T6Q is in a closed state, that is, the temperature control module 12 is in a closed state. If the ambient temperature is low, the temperature control signal Qc is a high voltage, which makes the control end of the second control transistor T6Q in a high level, and makes the second control transistor T6Q enter an open state, that is, the temperature control module 12 is in an open state. At this time, the second control transistor T6Q can transmit the potential signal of the control node Q to the control end of the target driving module 13 according to the temperature control signal Qc, so as to achieve the effect of turning on the target driving module 13.

[0051] It should be noted that after the first pixel scanning signal Gout(n-8) ends, the first control transistor T2Q enters the off state, but at this time the potential of the control end of the second control transistor T6Q is maintained at the voltage of the temperature control signal Qc.

[0052] like Figure 2 As shown, in an optional implementation of the present application, the temperature control module 12 also includes a first capacitor C1 and a second capacitor C2; the first end of the first capacitor C1 is electrically connected to the control end of the second control transistor T6Q, the second end of the first capacitor C1 is electrically connected to the second end of the second control transistor T6Q, the first end of the second capacitor C2 is electrically connected to the second end of the second control transistor T6Q, and the second end of the second capacitor C2 is electrically connected to the second end of the target drive module 13; the first capacitor C1 is used to couple and pull up the potential of the control end of the second control transistor T6Q to receive the temperature control signal; the second capacitor C2 is used to couple and pull up the potential of the second end of the second control transistor T6Q.

[0053] In this embodiment, when the potential signal of the control node Q passes through the second control transistor T6Q, the potential signal of the control node Q will be coupled by the first capacitor C1 to pull up the potential of the control end of the second control transistor T6Q to receive the temperature control signal, that is, further pull up the gate voltage of the second control transistor T6Q to ensure sufficient Vgs so that the potential signal of the control node Q can smoothly pass through the second control transistor T6Q to act on the control end of the target drive module 13. When the clock signal end inputs the clock signal, the potential of the second end of the second control transistor T6Q can be coupled and pulled up through the second capacitor C2, that is, the potential of the drain of the second control transistor T6Q is pulled up, so that the Vgs of the target drive module 13 is greater than the Von voltage, so that the clock signal can smoothly pass through the target drive module 13, so that the target drive module 13 can output the target drive signal to the output end of the gate drive module 11 according to the clock signal provided by the clock signal end. It should be noted that Vgs represents the voltage difference between the gate and the source of the transistor, and Von represents the Vgs voltage required for the transistor to start.

[0054] like Figure 1-2 As shown, in an optional implementation of the present application, the target driving module 13 may include a compensation driving transistor T6-2; the control end of the compensation driving transistor T6-2 is electrically connected to the output end of the temperature control module 12, the first end of the compensation driving transistor T6-2 is electrically connected to the clock signal end of the gate driving module 11, and the second end of the compensation driving transistor T6-2 is electrically connected to the output end of the gate driving module 11; the compensation driving transistor T6-2 is used to output the target driving signal according to the clock signal provided by the clock signal end under the potential control of the control end of the compensation driving transistor T6-2.

[0055] In this embodiment, when the compensation driving transistor T6-2 is a TFT, the control end of the compensation driving transistor T6-2 is the gate of the TFT, the first end of the compensation driving transistor T6-2 is the source of the TFT, and the second end of the compensation driving transistor T6-2 is the drain of the TFT; thereby, when the potential signal of the control node Q of the gate driving module 11 is transmitted to the control end of the target driving module 13 at the output end of the temperature control module 12, the compensation driving transistor T6-2 can output the target driving signal according to the clock signal provided by the clock signal end under the potential control of the control end of the compensation driving transistor T6-2.

[0056] like Figure 1As shown, in an optional implementation of the present application, the gate driving module 11 may include a first transistor T1, a second transistor T2, a fourth transistor T4, a gate driving transistor T6-1, an eighth transistor T8 and a third capacitor C3, and the control node Q is a node where the second end of the first transistor is connected to the control end of the gate driving transistor and the first end of the third capacitor; the first end of the first transistor T1 is electrically connected to the control end of the first transistor T1 and the control end of the fourth transistor T4, the second end of the first transistor T1 is electrically connected to the temperature control module 12 as the control node of the gate driving module 11, the control end of the second transistor T2 is electrically connected to the first power supply end, the first end of the second transistor T2 is electrically connected to the control end of the second transistor T2 and the first power supply end, and the second end of the second transistor T2 is electrically connected to the temperature control module 12 as the control node of the gate driving module 11. The first end of the fourth transistor T4 is electrically connected, the second end of the fourth transistor T4 is electrically connected to the second end of the eighth transistor T8 and the second power supply end, the control end of the fourth transistor T4 is electrically connected to the control end of the first transistor T1, the control end of the gate drive transistor T6-1 is electrically connected to the second end of the first transistor T1, the first end of the gate drive transistor T6-1 is electrically connected to the first end of the target drive module 13, the second end of the gate drive transistor T6-1 is electrically connected to the second end of the target drive module 13, the first end of the eighth transistor T8 is electrically connected to the control node Q, the second end of the eighth transistor T8 is electrically connected to the second power supply end, the first end of the third capacitor C3 is electrically connected to the control end of the gate drive transistor T6-1, and the second end of the third capacitor C3 is electrically connected to the second end of the gate drive transistor T6-1.

[0057] It should be noted that the control node Q in this embodiment refers to a specific operating point of the TFT during operation. This point defines the on-state of the TFT, that is, how much current the TFT allows to flow through the pixel. In the pixel circuit of the LCD, the Q point is a key factor in determining the charging voltage of the pixel capacitor. By adjusting the Q point, the brightness level of the pixel can be controlled; the control node Q can be called the "operating point".

[0058] (Operating Point), "Operating Current" or "On Voltage" etc.

[0059] like Figure 1As shown, in an optional implementation of the present application, the gate driving module 11 may also include a third transistor T3, a fifth transistor T5 and a seventh transistor T7; the first end of the third transistor T3 is electrically connected to the second end of the first transistor T1, the second end of the third transistor T3 is electrically connected to the second power supply end, the control end of the third transistor T3 is electrically connected to the first end of the fourth transistor T4, the first end of the fifth transistor T5 and the control end of the seventh transistor T7, the control end of the fifth transistor T5 is electrically connected to the control node, the first end of the fifth transistor T5 is electrically connected to the control end of the seventh transistor T7, the second end of the fifth transistor T5 is electrically connected to the second power supply end, the first end of the seventh transistor T7 is electrically connected to the second end of the gate driving transistor T6-1, and the second end of the seventh transistor T7 is electrically connected to the second power supply end.

[0060] In this embodiment, when the first transistor T1, the second transistor T2, the third transistor T3, the fourth transistor T4, the fifth transistor T5, the gate driving transistor T6-1, the seventh transistor T7, and the eighth transistor T8 are TFTs, the first transistor T1, the second transistor T2, the third transistor T3, the fourth transistor T4, the fifth transistor T5, the seventh transistor T7, and the eighth transistor T8 are all used to adjust the potential of the control node Q of the gate driving module 11, and the control ends of the first transistor T1, the second transistor T2, the third transistor T3, the fourth transistor T4, the fifth transistor T5, the gate driving transistor T6-1, the seventh transistor T7, and the eighth transistor T8 are the gates of the transistors, and the first and second ends of the first transistor T1, the second transistor T2, the third transistor T3, the fourth transistor T4, the fifth transistor T5, the gate driving transistor T6-1, the seventh transistor T7, and the eighth transistor T8 can be the source or drain of the transistor; so that the gate driving transistor T6-1 can output a gate driving signal to the output end of the gate driving module 11 according to the clock signal provided by the clock signal end when receiving the potential signal of the control node Q. It should be noted that the control terminal of the first transistor T1 is used to receive the second pixel scanning signal Gout(N-4), and the control terminal of the eighth driving transistor is used to receive the third pixel scanning signal Gout(N+8).

[0061] In addition, if Figure 1As shown, in this embodiment, the node connected to the second end of the second transistor, the control end of the third transistor, the first end of the fourth transistor, and the first end of the fifth transistor is Qb point. Qb point can refer to a specific operating point when the TFT is closed or cut off. This point defines the closed state of the TFT, that is, the state of the TFT when it is not conductive. Qb point is crucial to maintain the charge on the pixel capacitor to ensure that the displayed image can remain stable during the TFT off period until the next refresh. Qb point can also be called "cutoff point", "hold voltage" or "storage voltage".

[0062] In one example, when the ambient temperature is room temperature or high temperature, the temperature control signal Qc input to the temperature control signal end of the temperature control module 12 is at a low potential. At this time, the temperature control module 12 is turned off, and the potential signal of the control node Q of the gate drive module 11 cannot control the compensation drive transistor T6-2. At this time, the Gout (N) output of the gate drive circuit 100 is completely controlled by the gate drive signal output by the gate drive transistor T6-1; but when the ambient temperature decreases, the temperature control signal Qc input to the temperature control signal end of the temperature control module 12 is converted to a high potential. At this time, the temperature control module 12 is turned on, and the potential signal of the control node Q of the gate drive module 11 will simultaneously control the gate drive transistor T6-1 and the compensation drive transistor T6-2. At this time, the Gout (N) output of the gate drive circuit 100 is stronger than when only the gate drive transistor T6-1 outputs the gate drive signal to turn on the control. Therefore, the driving capability of the GDL circuit at low temperatures is improved without changing the input voltage. In specific implementation, the temperature control signal Qc of the temperature control module 12 can be as follows Figure 3 shown.

[0063] In addition, the power ratio between the gate drive transistor T6-1 and the compensation drive transistor T6-2 in this embodiment can be adjusted. The specific adjustment method can be manually adjusted or adaptively adjusted according to the ambient temperature, so that the power ratio between the gate drive transistor T6-1 and the compensation drive transistor T6-2 can be adjusted to reduce the current Root Mean Square (RMS) at room temperature and high temperature. Square, RMS), which can effectively improve the temperature of the panel and prevent the problem of screen melting under high temperature conditions; specifically, for example, in the traditional technical means, the merit of the gate drive circuit is 100. At this time, the sum of the output powers of the gate drive transistor T6-1 and the compensation drive transistor T6-2 can be greater than 100, such as 120 or 110, so as to improve the driving ability of the GDL circuit at low temperatures without changing the input voltage; however, since the temperature of the panel itself is high under high temperature conditions, if the operating power of the gate drive transistor T6-1 is large at this time, there is a large RMS, which further increases the panel temperature, thereby easily causing the problem of screen melting; and in the scenario where the gate drive transistor T6-1 and the compensation drive transistor T6-2 are used in the present embodiment to cooperate with each other for output, the gate can be adjusted The power ratio between the driving transistor T6-1 and the compensation driving transistor T6-2, such as the power of the gate driving transistor T6-1 is 80, and the power of the compensation driving transistor T6-2 is 30 or 40, the power of the gate driving transistor T6-1 is reduced at this time, and the high temperature condition is only output by the gate driving transistor T6-1, which plays a role in reducing the RMS value of the gate driving circuit 100 under high temperature conditions and preventing the panel temperature from further increasing, solving the problem of screen melting under high temperature conditions; and because the power ratio of the gate driving transistor T6-1 and the compensation driving transistor T6-2 is adjusted, the sum of the powers of the gate driving transistor T6-1 and the compensation driving transistor T6-2 is not reduced, and the driving capability of the GDL circuit under low temperature can still be improved without changing the input voltage.

[0064] The present application also discloses an embodiment, providing a display driving device 410, comprising: N cascaded gate driving circuits, and each gate driving circuit unit is a gate driving circuit 100 as described in any of the aforementioned embodiments, wherein N is an integer greater than 1.

[0065] In this embodiment, each gate driving circuit is used to electrically connect to a corresponding pixel display circuit, and each gate driving circuit is used to output a corresponding pixel scanning signal Gout to the pixel display circuit to drive each pixel display circuit to display.

[0066] like Figure 6As shown, in an optional embodiment of the present application, a temperature signal generating circuit 411 is also included; a first input end of the temperature signal generating circuit 411 is electrically connected to an output end of a preset temperature compensation circuit, a second input end of the temperature signal generating circuit 411 is electrically connected to a preset fixed power supply input end, and an output end of the temperature signal generating circuit 411 is electrically connected to a temperature control signal end of a temperature control module; the temperature signal generating circuit 411 is used to output a temperature control signal to the temperature control signal end of the temperature signal generating circuit 411 under the control of the first input end of the temperature signal generating circuit 411 and the second input end of the temperature signal generating circuit 411.

[0067] The preset temperature compensation circuit in this embodiment is used to collect the ambient temperature, generate an ambient temperature signal according to the ambient temperature, and transmit the ambient temperature signal to the temperature signal generating circuit 411, so that the temperature signal generating circuit 411 outputs the temperature control signal Qc to the temperature control signal terminal of the temperature signal generating circuit 411 under the control of the first input terminal of the temperature signal generating circuit 411 and the second input terminal of the temperature signal generating circuit 411. It should be noted that the temperature signal generating circuit 411 in this embodiment can be electrically connected to the temperature control module in one or more gate driving circuits 100 in the above manner.

[0068] In one example, when the ambient temperature is lower than a preset temperature threshold, the preset temperature compensation circuit determines that the collected ambient temperature is lower than the preset temperature threshold. At this time, the ambient temperature signal generated based on the ambient temperature is a high level, and the high level ambient temperature signal is transmitted to the temperature signal generating circuit 411, so that the temperature signal generating circuit 411 outputs a temperature control signal Qc to the temperature control signal end of the temperature signal generating circuit 411 under the control of the first input end of the temperature signal generating circuit 411 and the second input end of the temperature signal generating circuit 411; and when the ambient temperature is not lower than the preset temperature threshold, the preset temperature compensation circuit determines that the collected ambient temperature is not lower than the preset temperature threshold. At this time, the ambient temperature signal generated based on the ambient temperature is a low level. After the low level ambient temperature signal is transmitted to the temperature signal generating circuit 411, the temperature signal generating circuit 411 does not output the temperature control signal Qc.

[0069] like Figure 6As shown, in an optional embodiment of the present application, the temperature signal generating circuit 411 may include a comparator unit; the non-inverting input terminal of the comparator unit is electrically connected to the output terminal of the preset temperature compensation circuit as the first input terminal of the temperature signal generating circuit 411, the inverting input terminal of the comparator unit is electrically connected to the preset fixed power input terminal as the second input terminal of the temperature signal generating circuit 411, the positive power input terminal of the comparator unit is electrically connected to the first power terminal, the negative power input terminal of the comparator unit is electrically connected to the second power terminal, and the output terminal of the comparator unit is electrically connected to the temperature control signal terminal of the temperature control module as the output terminal of the temperature signal generating circuit 411.

[0070] In this embodiment, Figure 6 The non-inverting input terminal of the comparator unit shown is VGH (+IN), and the inverting input terminal of the comparator unit is 30V (-IN). Since the non-inverting input terminal of the comparator unit in this embodiment is electrically connected to the output terminal of the preset temperature compensation circuit as the first input terminal of the temperature signal generating circuit 411; when the ambient temperature is lower than the preset temperature threshold, the temperature compensation circuit outputs a high level to the non-inverting input terminal of the comparator unit, so that the voltage of the non-inverting input terminal VGH (+IN) will be higher than the 30V (-IN) of the inverting input terminal (VGH at room temperature), VGH>30V, at this time, the temperature control signal Qc outputted from the output terminal of the comparator unit to the temperature control signal terminal of the temperature control module is the positive voltage of the power supply VDD, that is, the temperature control signal Qc of the high level is output; when the ambient temperature is not lower than the preset temperature threshold, the temperature compensation circuit outputs a low level to the non-inverting input terminal of the comparator unit, so that the voltage of the non-inverting input terminal VGH (+IN) will be lower than the 30V (-I N), VGH≤30V, at this time, the temperature control signal Qc outputted from the output end of the comparator unit to the temperature control signal end of the temperature control module is the voltage of the second power supply end VSS, that is, the temperature control signal Qc of low level is output; thereby, the ambient temperature collected by the temperature compensation circuit is corresponded to the temperature control signal Qc, so that when the ambient temperature is lower than the preset temperature threshold, the temperature control signal Qc of high level is output, and when the ambient temperature is not lower than the preset temperature threshold, the temperature control signal Qc of low level is output. In combination with the above-mentioned embodiment, it can be determined that when the temperature control signal Qc is at a high level, the target drive module can output the target drive signal to the output end of the gate drive module according to the clock signal provided by the clock signal end under the potential control of the control end of the target drive module; it plays a role in improving the driving capability of the gate drive circuit, solves the problem caused by enhancing the driving capability of the gate drive circuit by increasing the power supply voltage in the existing related technology, and improves the circuit safety.

[0071] like Figure 7As shown, the embodiment of the present invention further provides a display device 710, comprising the above-mentioned gate drive circuit 100 provided in the embodiment of the present invention and a power supply module 711, wherein the power supply module 711 is used to control the power supply to the gate drive circuit 100. Figure 7 As shown, the display device 710 includes: a gate drive circuit 100 and a power supply module 711, wherein the power supply module 711 is used to control the power supply to the gate drive circuit 100; wherein the gate drive circuit 100 may be the gate drive circuit 100 described in the above embodiment. In a specific implementation, the display device 710 may be a display, a mobile phone, a television, a laptop computer, an electronic paper, a digital photo frame, a navigator, etc., and this application does not impose any specific restrictions on this.

[0072] According to the display device 710 of the embodiment of the present application, the gate driving circuit 100 in the above embodiment is adopted, and the display device 710 is electrically connected to the output end of the temperature control module through the control end of the target driving module, the first end of the target driving module is electrically connected to the clock signal end of the gate driving module, and the second end of the target driving module is electrically connected to the output end of the gate driving module, so that the temperature control module is used to transmit the potential signal of the control node of the gate driving module to the control end of the target driving module under the control of the temperature control signal end, and the target driving module is used to output the target driving signal to the output end of the gate driving module according to the clock signal provided by the clock signal end under the potential control of the control end of the target driving module, so as to improve the driving capability of the gate driving circuit, solve the problem caused by enhancing the driving capability of the gate driving circuit by increasing the power supply voltage in the existing related technology, and improve the circuit safety.

[0073] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0074] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a general hardware platform, and of course, by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for 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 some parts of the embodiments.

[0075] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0076] The above describes specific embodiments of the present specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0077] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be 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 will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A gate drive circuit, characterized in that: include: Gate drive module, temperature control module and target drive module; The control end of the target driving module is electrically connected to the output end of the temperature control module, the first end of the target driving module is electrically connected to the clock signal end of the gate driving module, and the second end of the target driving module is electrically connected to the output end of the gate driving module; The temperature control module is used to transmit the potential signal of the control node of the gate driving module to the control end of the target driving module under the control of the temperature control signal end; The target driving module is used to output a target driving signal to the output end of the gate driving module according to the clock signal provided by the clock signal end under the potential control of the control end of the target driving module; The temperature control module includes a first control transistor and a second control transistor; The first end of the first control transistor is electrically connected to the temperature control signal end, the second end of the first control transistor is electrically connected to the control end of the second control transistor, the first end of the second control transistor is electrically connected to the control node of the gate driving module, and the second end of the second control transistor is electrically connected to the control end of the target driving module; The first control transistor is used to transmit the temperature control signal provided by the temperature control signal terminal to the control terminal of the second control transistor under the control of the first pixel scanning signal terminal; The second control transistor is used to transmit the potential signal of the control node to the control end of the target driving module according to the temperature control signal.

2. The gate driving circuit according to claim 1, characterized in that: The temperature control module also includes a first capacitor and a second capacitor; The first end of the first capacitor is electrically connected to the control end of the second control transistor, the second end of the first capacitor is electrically connected to the second end of the second control transistor, the first end of the second capacitor is electrically connected to the second end of the second control transistor, and the second end of the second capacitor is electrically connected to the second end of the target drive module.

3. The gate driving circuit according to claim 1, characterized in that: The target driving module includes a compensation driving transistor; The control end of the compensation driving transistor is electrically connected to the output end of the temperature control module, the first end of the compensation driving transistor is electrically connected to the clock signal end of the gate driving module, and the second end of the compensation driving transistor is electrically connected to the output end of the gate driving module; The compensation driving transistor is used to output the target driving signal according to the clock signal provided by the clock signal terminal under the potential control of the control terminal of the compensation driving transistor.

4. The gate driving circuit according to claim 1, characterized in that: The gate driving module comprises: a first transistor, a second transistor, a fourth transistor, a gate driving transistor, an eighth transistor and a third capacitor, wherein the control node is a node where the second end of the first transistor is connected to the control end of the gate driving transistor and the first end of the third capacitor; Among them, the first end of the first transistor is electrically connected to the control end of the first transistor and the control end of the fourth transistor, the control end of the second transistor is electrically connected to the first power supply end, the first end of the second transistor is electrically connected to the control end of the second transistor and the first power supply end, the second end of the second transistor is electrically connected to the first end of the fourth transistor, the second end of the fourth transistor is electrically connected to the second end of the eighth transistor and the second power supply end, the first end of the gate driving transistor is electrically connected to the first end of the target driving module, the second end of the gate driving transistor is electrically connected to the second end of the target driving module, the first end of the eighth transistor is electrically connected to the control node, and the second end of the third capacitor is electrically connected to the second end of the gate driving transistor.

5. The gate driving circuit according to claim 4, characterized in that: The gate driving module further includes: a third transistor, a fifth transistor and a seventh transistor; The first end of the third transistor is electrically connected to the second end of the first transistor, the second end of the third transistor is electrically connected to the second power supply terminal, the control end of the third transistor is electrically connected to the first end of the fourth transistor, the first end of the fifth transistor and the control end of the seventh transistor, the control end of the fifth transistor is electrically connected to the control node, the second end of the fifth transistor is electrically connected to the second power supply terminal, the first end of the seventh transistor is electrically connected to the second end of the gate drive transistor, and the second end of the seventh transistor is electrically connected to the second power supply terminal.

6. A display driving device, characterized in that: It comprises: N cascaded gate driving circuit units, and each of the gate driving circuit units is a gate driving circuit as claimed in any one of claims 1 to 5, wherein N is an integer greater than 1.

7. The display driving device according to claim 6, characterized in that: It also includes a temperature signal generating circuit; The first input end of the temperature signal generating circuit is electrically connected to the output end of the preset temperature compensation circuit, the second input end of the temperature signal generating circuit is electrically connected to the preset fixed power input end, and the output end of the temperature signal generating circuit is electrically connected to the temperature control signal end of the temperature control module; The temperature signal generating circuit is used to output a temperature control signal to the temperature control signal terminal of the temperature signal generating circuit under the control of the first input terminal of the temperature signal generating circuit and the second input terminal of the temperature signal generating circuit.

8. The display driving device according to claim 7, characterized in that: The temperature signal generating circuit comprises a comparator unit; The non-inverting input terminal of the comparator unit is electrically connected to the output terminal of the preset temperature compensation circuit as the first input terminal of the temperature signal generating circuit, the inverting input terminal of the comparator unit is electrically connected to the preset fixed power input terminal as the second input terminal of the temperature signal generating circuit, the positive power input terminal of the comparator unit is electrically connected to the first power terminal, the negative power input terminal of the comparator unit is electrically connected to the second power terminal, and the output terminal of the comparator unit is electrically connected to the temperature control signal terminal of the temperature control module as the output terminal of the temperature signal generating circuit.

9. A display device, characterized in that: include: The gate drive circuit and power supply module according to any one of claims 1 to 5, wherein the power supply module is used to control the power supply to the gate drive circuit.

Images