Display drive circuit and display device

Abstract

The application belongs to the field of display, and particularly relates to a display driving circuit and a display device. The display driving circuit comprises a picture crosstalk detection module, a refresh rate adjusting module and a gate driving circuit. The gate driving circuit is used for connecting a scanning line of a display panel. The refresh rate adjusting module is connected to the gate driving circuit away from the scanning line end, and controls the refresh rate of the display panel by controlling the scanning signal generated by the gate driving circuit. Or the refresh rate adjusting module is connected between the gate driving circuit and the scanning line, and controls the refresh rate of the display panel by controlling the output of the scanning signal. The picture crosstalk detection module is connected to the refresh rate adjusting module, and is used for detecting the crosstalk of a display picture, and controlling the refresh rate adjusting module to adjust the refresh rate according to the crosstalk severity, so that the refresh rate is negatively related to the crosstalk severity. When the display picture crosstalk is serious, the refresh rate is reduced, the common voltage recovery time is prolonged, the crosstalk can be improved or eliminated, and the display quality of the display panel is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of display, and particularly relates to a display driving circuit and a display device. BACKGROUND

[0002] When a liquid crystal display is displaying, a pixel electrode and a common electrode form a liquid crystal capacitor (Clc) to drive liquid crystal molecules to deflect, and control the brightness of each sub-pixel to realize picture display. If a single direction electric field is applied to the liquid crystal molecules for a long time, the liquid crystal molecules may be polarized, resulting in a decline in display effect, or even damage to the liquid crystal material. By polarity inversion, the direction of the electric field is alternately changed, which can effectively avoid the polarization of the liquid crystal molecules.

[0003] The data line provides a data voltage for the pixel electrode, and polarity inversion makes the data voltage greater than or less than a common voltage (Vcom) of the common electrode. A coupling capacitor (Cdc) formed between the data line and the pixel electrode will cause the common voltage to deviate, and the common voltage deviation will cause crosstalk, affecting the display effect of the liquid crystal display.

[0004] The display refresh rate is the number of times a picture on the screen is refreshed per second. The higher the refresh rate, the smoother the display picture when displaying some dynamic pictures (such as games). However, the higher the refresh rate, the shorter the time left for the common voltage to recover, the more serious the crosstalk caused by the common voltage deviation, and the more obvious the degradation of the display effect of the liquid crystal display. SUMMARY

[0005] The purpose of the present application is to provide a display driving circuit and a display device to improve or eliminate crosstalk and improve the display quality of the liquid crystal display.

[0006] In order to achieve the above purpose, the present application provides a display driving circuit, which comprises a gate driving circuit for connecting a scanning line of a display panel, and further comprises:

[0007] a refresh rate adjusting module, which is connected to one end of the gate driving circuit away from the scanning line, and controls the refresh rate of the display panel by controlling the scanning signal generated by the gate driving circuit, or the refresh rate adjusting module is connected between the gate driving circuit and the scanning line, and controls the refresh rate of the display panel by controlling the output of the scanning signal;

[0008] a picture crosstalk detection module connected to the refresh rate adjusting module, which is used to detect the crosstalk of the display picture of the display panel, and control the refresh rate adjusting module to adjust the refresh rate of the display panel according to the severity of the crosstalk, so that the refresh rate is negatively related to the severity of the crosstalk.

[0009] Optionally, the refresh rate adjusting module is connected to the gate drive circuit away from the one end of the scan line, and the refresh rate adjusting module is a timing controller.

[0010] Optionally, the display drive circuit further comprises a data signal processing module, the data signal processing module comprises a sampling unit and a selection unit, the selection unit is connected to a system on chip, the timing controller and the picture crosstalk detection module, when the refresh rate of the display panel is unchanged, the picture crosstalk detection module controls the selection unit to work, so that the system on chip is directly connected to the timing controller, when the refresh rate of the display panel is reduced, the picture crosstalk detection module controls the selection unit to work, so that the system on chip is indirectly connected to the timing controller through the sampling unit, the data signal output by the system on chip comprises m frames of display pictures, and the sampling unit is used for extracting part of the m frames of display pictures and outputting the part to the timing controller.

[0011] Optionally, the n-th frame of display picture extracted by the sampling unit is composed of part of data signal of the (n-1)-th frame of display picture and part of data signal of the (n+1)-th frame of display picture.

[0012] Optionally, the refresh rate adjusting module is connected between the gate drive circuit and the scan line, the refresh rate adjusting module comprises a first transistor and a second transistor, the control end of the first transistor and the control end of the second transistor are connected to the picture crosstalk detection module, the first end of the first transistor is connected to the gate drive circuit, the second end of the first transistor is connected to the scan line, the first end of the second transistor is connected to a first power supply, the second end of the second transistor is connected to the scan line, the channel type of the first transistor and the channel type of the second transistor are different, and the first power supply provides a control voltage for turning off the driving transistor connected to the scan line.

[0013] Optionally, the picture crosstalk detection module is connected to a system on chip, and the picture crosstalk detection module judges the crosstalk severity of the display picture according to the data signal output by the system on chip.

[0014] Optionally, the picture crosstalk detection module is connected to a common electrode of the display panel, and the picture crosstalk detection module judges the crosstalk severity of the display picture according to the deviation of the measured voltage of the common electrode from the set voltage of the common electrode.

[0015] Optionally, the picture crosstalk detection module comprises a first operational amplifier, a second operational amplifier, a third operational amplifier and a fourth operational amplifier, a non-inverting input terminal of the first operational amplifier is connected with a common electrode of the display panel, an inverting input terminal of the first operational amplifier is connected with a second power supply, the second power supply provides a set voltage of the common electrode, a non-inverting input terminal of the second operational amplifier is connected with a third power supply, an inverting input terminal of the second operational amplifier is connected with an output terminal of the first operational amplifier, a non-inverting input terminal of the third operational amplifier is connected with a fourth power supply, an inverting input terminal of the third operational amplifier is connected with the output terminal of the first operational amplifier, one power input terminal of the second operational amplifier and the third operational amplifier is connected with a fifth power supply, the fifth power supply has a voltage equal to a voltage of a high-level signal, the other power input terminal of the second operational amplifier and the third operational amplifier is grounded, the third power supply provides an upper limit voltage when a refresh rate of the display panel is reduced, the fourth power supply provides a lower limit voltage when the refresh rate of the display panel is reduced, a non-inverting input terminal of the fourth operational amplifier is connected with an output terminal of the second operational amplifier, an inverting input terminal of the fourth operational amplifier is connected with an output terminal of the third operational amplifier, and the output terminal of the fourth operational amplifier is connected with the refresh rate adjustment module.

[0016] Optionally, the picture crosstalk detection module further comprises a first inverter, a temperature-dependent resistor and an AND gate logic, a first input terminal of the AND gate logic is connected with the output terminal of the fourth operational amplifier through the first inverter, a second input terminal of the AND gate logic is connected with a sixth power supply through the temperature-dependent resistor, and the sixth power supply has a voltage equal to the voltage of the high-level signal.

[0017] The application further provides a display device, comprising:

[0018] the display driving circuit;

[0019] a display panel connected with the display driving circuit.

[0020] The display driving circuit and the display device disclosed by the application have the following beneficial effects:

[0021] In the present application, the display driving circuit comprises a picture crosstalk detection module, a refresh rate adjusting module and a gate driving circuit. The gate driving circuit is used to connect the scanning line of the display panel. The refresh rate adjusting module is connected to the end of the gate driving circuit away from the scanning line and controls the refresh rate of the display panel by controlling the scanning signal generated by the gate driving circuit. Or the refresh rate adjusting module is connected between the gate driving circuit and the scanning line and controls the refresh rate of the display panel by controlling the output of the scanning signal. The picture crosstalk detection module is connected to the refresh rate adjusting module and is used to detect the crosstalk of the display panel. According to the severity of the crosstalk, the refresh rate adjusting module adjusts the refresh rate of the display panel, so that the refresh rate is negatively correlated with the severity of the crosstalk. When the display picture crosstalk is serious, the refresh rate is reduced, the common voltage recovery time is prolonged, the crosstalk is improved or eliminated, and the display quality of the display panel is improved.

[0022] Other characteristics and advantages of the present application will become apparent from the following detailed description, or will be learned by practice of the present application.

[0023] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and are not limiting to the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0024] The drawings incorporated in the specification hereof and forming a part thereof illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. It is clear that the drawings described below are only some embodiments of the present application, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0025] Figure 1 is a structural schematic diagram of the display driving circuit in the first embodiment of the present application.

[0026] Figure 2 is a working logic diagram of the display driving circuit in the first embodiment of the present application.

[0027] Figure 3 is a waveform schematic diagram of the measured voltage of the common voltage in the first embodiment of the present application.

[0028] Figure 4 is a structural schematic diagram of the picture crosstalk detection module in the first embodiment of the present application.

[0029] Figure 5 is a negative correlation schematic diagram of the resistance value of the temperature sensitive resistor and the ambient temperature in the first embodiment of the present application.

[0030] Figure 6 is a structural schematic diagram of the display driving circuit in the second embodiment of the present application.

[0031] Figure 7 is a structural schematic diagram of a display device in Embodiment Three of the present application.

[0032] Legend of reference signs:

[0033] 100, picture crosstalk detection module; 110, first operational amplifier; 120, second operational amplifier; 130, third operational amplifier; 140, fourth operational amplifier; 150, first inverter; 160, temperature-sensitive resistor; 170, AND gate logic;

[0034] 200, refresh rate adjustment module; 210, first transistor; 220, second transistor;

[0035] 300, gate drive circuit;

[0036] 400, data signal processing module; 410, sampling unit; 420, selection unit; 421, third transistor; 422, fourth transistor; 423, second inverter;

[0037] 501, first power supply; 502, second power supply; 503, third power supply; 504, fourth power supply; 505, fifth power supply; 506, sixth power supply;

[0038] 10, display drive circuit; 20, display panel; 30, system on chip. DETAILED DESCRIPTION

[0039] Example implementations will now be described with reference to the drawings; however, example implementations can be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example implementations to those skilled in the art.

[0040] In addition, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the application can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the application.

[0041] The application will be further described below in conjunction with the drawings and specific embodiments. It should be noted that the technical features involved in each of the embodiments of the application described below can be combined with each other as long as there is no conflict. The embodiments described below with reference to the drawings are exemplary and are intended to explain the application, and should not be understood as limiting the application.

[0042] Embodiment One

[0043] Referring to Figure 1 and Figure 2 As shown in the figure, the display driving circuit 10 in this embodiment includes a picture crosstalk detection module 100, a refresh rate adjustment module 200 and a gate driving circuit 300. The gate driving circuit 300 is used to connect the scan lines of the display panel 20, and the gate driving circuit 300 can output a scan signal to control the driving transistor connected by the scan line to be turned on, so that the data voltage of the data line can be written into the pixel electrode. The gate driving circuit 300 includes a gate driving chip and an array substrate row driving circuit (GOA), which can be made on the display panel 20.

[0044] The refresh rate adjustment module 200 is connected to the gate driving circuit 300 away from the one end of the scan line, and controls the refresh rate of the display panel 20 by controlling the scan signal generated by the gate driving circuit 300. For example, if the driving transistor of the display panel 20 is an N-channel thin film transistor, the refresh rate adjustment module 200 controls the interval time of the high level signal H in the scan signal to control the refresh rate of the display panel 20.

[0045] The refresh rate adjustment module 200 can also be connected between the gate driving circuit 300 and the scan line, and control the refresh rate of the display panel 20 by controlling the output of the scan signal. When the refresh rate adjustment module 200 is turned on, the gate driving circuit 300 and the scan line are electrically connected, and the scan signal can be output to the scan line, and the driving transistor connected by the scan line is turned on; when the refresh rate adjustment module 200 is turned off, the electrical connection between the gate driving circuit 300 and the scan line is disconnected, and the scan signal cannot be output to the scan line, and the driving transistor connected by the scan line is turned off.

[0046] The picture crosstalk detection module 100 is connected to the refresh rate adjustment module 200, and the picture crosstalk detection module 100 is used to detect the crosstalk of the display panel 20, and according to the severity of the crosstalk, the refresh rate adjustment module 200 adjusts the refresh rate of the display panel 20, so that the refresh rate is negatively related to the severity of the crosstalk. That is, when the display picture has serious crosstalk, the refresh rate adjustment module 200 adjusts the refresh rate of the display panel 20 to be low, and the more serious the crosstalk, the lower the refresh rate; when the display picture has no crosstalk or slight crosstalk, the refresh rate adjustment module 200 maintains the refresh rate of the display panel 20 unchanged.

[0047] It should be understood that the data line provides a data voltage for the pixel electrode, and the polarity inversion makes the data voltage greater than or less than the common voltage. The coupling capacitance formed between the data line and the pixel electrode causes the common voltage to deviate, and the common voltage deviation causes crosstalk. The higher the refresh rate, the shorter the time left for the common voltage to recover, and the more serious the crosstalk caused by the common voltage deviation. When the display picture crosstalk is serious, the refresh rate adjusting module 200 adjusts the refresh rate of the display panel 20 to prolong the recovery time of the common voltage and eliminate the crosstalk caused by the common voltage deviation.

[0048] In this embodiment, the display driving circuit 10 includes a picture crosstalk detection module 100, a refresh rate adjusting module 200, and a gate driving circuit 300. The gate driving circuit 300 is used to connect the scan lines of the display panel 20. The refresh rate adjusting module 200 is connected to the end of the gate driving circuit 300 away from the scan lines and controls the refresh rate of the display panel 20 by controlling the scan signals generated by the gate driving circuit 300. Alternatively, the refresh rate adjusting module 200 is connected between the gate driving circuit 300 and the scan lines and controls the refresh rate of the display panel 20 by controlling the output of the scan signals. The picture crosstalk detection module 100 is connected to the refresh rate adjusting module 200 and is used to detect the crosstalk of the display picture of the display panel 20 and control the refresh rate adjusting module 200 to adjust the refresh rate of the display panel 20 according to the severity of the crosstalk, so that the refresh rate is negatively correlated with the severity of the crosstalk. When the display picture crosstalk is serious, the refresh rate is reduced, the common voltage recovery time is prolonged, the crosstalk is improved or eliminated, and the display quality of the display panel 20 is improved.

[0049] In some embodiments, the refresh rate adjusting module 200 is connected to the end of the gate driving circuit 300 away from the scan lines, and the refresh rate adjusting module 200 can be a timing controller. For example, the refresh rate of the data signal corresponding to the display picture is F1, and F1 is greater than 60 Hz. When the picture crosstalk detection module 100 detects that the display picture crosstalk is serious, the refresh rate adjusting module 200 reduces the refresh rate of the display panel 20 to F2, and F2 is less than F1. F2 can be 60 Hz. It should be understood that the timing controller can store the corresponding relationship between the severity of the display picture crosstalk and the refresh rate to realize stepless and continuous adjustment of the refresh rate.

[0050] The timing controller receives the data signal of the display picture output by the system on a chip (SOC) 30, controls the source driving circuit to generate a data voltage according to the data signal, and controls the scan signal generated by the gate driving circuit 300 to write the data voltage into the pixel electrode row by row to realize the display of the display panel 20. By adjusting the refresh rate of the display panel 20 through the timing controller, no additional circuit needs to be set, and the manufacturing cost of the display driving circuit 10 can be reduced.

[0051] In some embodiments, the display driver circuit 10 further includes a data signal processing module 400, which includes a sampling unit 410 and a selection unit 420. The selection unit 420 is connected to the system-on-chip 30, the timing controller, and the crosstalk detection module 100. When the refresh rate of the display panel 20 remains unchanged, the crosstalk detection module 100 controls the selection unit 420 to operate, directly connecting the system-on-chip 30 to the timing controller. When the refresh rate of the display panel 20 decreases, the crosstalk detection module 100 controls the selection unit 420 to operate, indirectly connecting the system-on-chip 30 to the timing controller through the sampling unit 410.

[0052] The data signal output by the system-on-chip 30 includes m frames of display images, and the sampling unit 410 is used to extract a portion of the m frames of display images and output it to the timing controller. The sampling ratio of the sampling unit 410 is F2 / F1.

[0053] When the refresh rate of the display panel 20 is reduced, the number of display frames output to the timing controller is reduced accordingly, which can not only reduce the amount of calculation of the timing controller, the source driver circuit and the gate driver circuit 300, but also avoid the mismatch between the number of display frames provided by the system-level chip 30 and the actual number of displayed frames, resulting in display abnormalities.

[0054] In some embodiments, the selection unit 420 may include a third transistor 421 and a fourth transistor 422. The control end of the third transistor 421 and the control end of the fourth transistor 422 are both connected to the screen crosstalk detection module 100. The first end of the third transistor 421 and the first end of the fourth transistor 422 are both connected to the system-on-chip 30. The second end of the third transistor 421 is indirectly connected to the timing controller via the sampling unit 410, and the second end of the fourth transistor 422 is directly connected to the timing controller. One of the third transistor 421 and the fourth transistor 422 is an N-channel transistor and the other is a P-channel transistor.

[0055] For example, the third transistor 421 is an N-channel transistor, and the fourth transistor 422 is a P-channel transistor. When the refresh rate of the display panel 20 remains unchanged, the control signal (P) output by the image crosstalk detection module 100 is a low-level signal L, the third transistor 421 is turned off, and the fourth transistor 422 is turned on. The data signal of the display image output by the system-on-chip 30 is directly output to the timing controller. When the refresh rate of the display panel 20 decreases, the control signal (P) output by the image crosstalk detection module 100 is a high-level signal H, the third transistor 421 is turned on, and the fourth transistor 422 is turned off. The data signal of the display image output by the system-on-chip 30 is sampled and processed by the sampling unit 410 and then output to the timing controller.

[0056] It should be noted that the fourth transistor 422 can be a P-channel transistor, but is not limited thereto, and the fourth transistor 422 can also be replaced by an N-channel transistor, and a second inverter 423 can be arranged in front of the control end of the fourth transistor 422, which can be determined according to actual conditions.

[0057] In some embodiments, the n-th frame of display picture extracted by the sampling unit 410 is composed of partial data signals of the (n-1)-th frame of display picture and partial data signals of the (n+1)-th frame of display picture. For example, the n-th frame of display picture is composed of the first half frame of the (n-1)-th frame of display picture and the second half frame of the (n+1)-th frame of display picture.

[0058] The n-th frame of display picture extracted by the sampling unit 410 includes display pictures of the front and back frames, and the influence of reducing the refresh rate of the display panel 20 can be reduced, so that the transition of the data signals of the sampled display is smoother on the display panel 20.

[0059] In some embodiments, the picture crosstalk detection module 100 is connected with the system chip 30, and the picture crosstalk detection module 100 determines the severity of the crosstalk of the display picture according to the data signals output by the system chip 30. When the display panel 20 displays a special picture, such as an Excel picture (the picture is similar to an Excel table), crosstalk is likely to occur. The severity of the crosstalk can be determined according to the size of the crosstalk area of the display picture, for example, a display picture in which more than half of the picture appears crosstalk is a severely crosstalk picture.

[0060] The picture crosstalk detection module 100 detects the display picture to determine the severity of the crosstalk, which can avoid displaying a crosstalk picture on the display panel 20 and improve the display quality of the display panel 20.

[0061] In some embodiments, the picture crosstalk detection module 100 is connected with the common electrode of the display panel 20, and the picture crosstalk detection module 100 determines the severity of the crosstalk of the display picture according to the deviation of the measured voltage (VcomFB) of the common electrode from the set voltage (Vcom) of the common electrode.

[0062] The coupling capacitance formed between the data line and the pixel electrode can cause the common voltage to deviate, and in the picture crosstalk detection module 100, an interval value is set for the common voltage Vcom, that is, an upper limit voltage Vmax and a lower limit voltage Vmin are set, as shown in FIG. 8. When the picture crosstalk detection module 100 identifies that the common voltage Vcom exceeds the preset interval (greater than Vmax or less than Vmin, indicating that the horizontal crosstalk is severe), a high-level signal H is output. Conversely, when the common voltage Vcom does not exceed the preset interval, a low-level signal L is output. Figure 3

[0063] ​The time controller detects the display picture, and for some complex pictures, the detection may not be performed, and the detection is performed according to the pixel arrangement structure and the number. The existing known horizontal crosstalk picture may not be complete, and if a new picture appears horizontal crosstalk in the later period, the pixel structure of the picture is different from the existing one, and the time controller cannot detect the picture. In addition, the horizontal crosstalk phenomenon of different liquid crystals is inconsistent, and the unified setting cannot be completely compatible, which requires more debugging time.

[0064] In the embodiment, the picture crosstalk detection module 100 is connected with the common electrode of the display panel 20, and the picture crosstalk detection module 100 judges the crosstalk severity of the display picture according to the measured voltage of the common electrode. Compared with the scheme of detecting the display picture by using the time controller, the picture crosstalk detection module 100 can be used for detecting different types of horizontal crosstalk.

[0065] Referring to Figure 4 As shown in the figure, the picture crosstalk detection module 100 includes a first operational amplifier 110, a second operational amplifier 120, a third operational amplifier 130, and a fourth operational amplifier 140. The non-inverting input terminal of the first operational amplifier 110 is connected with the common electrode of the display panel 20, and the inverting input terminal of the first operational amplifier 110 is connected with a second power supply 502. The second power supply 502 provides a set voltage Vcom of the common electrode.

[0066] The non-inverting input terminal of the second operational amplifier 120 is connected with a third power supply 503, and the inverting input terminal of the second operational amplifier 120 is connected with the output terminal of the first operational amplifier 110. The non-inverting input terminal of the third operational amplifier 130 is connected with a fourth power supply 504, and the inverting input terminal of the third operational amplifier 130 is connected with the output terminal of the first operational amplifier 110. The third power supply 503 provides an upper limit voltage Vmax when the refresh rate of the display panel 20 is reduced, and the fourth power supply 504 provides a lower limit voltage Vmin when the refresh rate of the display panel 20 is reduced.

[0067] One power input terminal of the second operational amplifier 120 and the third operational amplifier 130 is connected with a fifth power supply 505, and the voltage V H of the fifth power supply 505 is equal to the voltage of the high-level signal H; the other power input terminal of the second operational amplifier 120 and the third operational amplifier 130 is grounded, and the ground voltage is GND. The non-inverting input terminal of the fourth operational amplifier 140 is connected with the output terminal of the second operational amplifier 120, the inverting input terminal of the fourth operational amplifier 140 is connected with the output terminal of the third operational amplifier 130, and the output terminal of the fourth operational amplifier 140 is connected with the refresh rate adjusting module 200.

[0068] The first operational amplifier 110 and the fourth operational amplifier 140 are configured as a reflector, and the second operational amplifier 120 and the third operational amplifier 130 are configured as a comparator. The output voltage Vo1 of the first operational amplifier 110 is the difference between the measured voltage VcomFB of the common electrode and the set voltage Vcom of the common electrode, i.e. Vo1 = VcomFB - Vcom.

[0069] When the crosstalk of the display panel 20 is serious, Vo < Vmin < Vmax, or Vo > Vmax > Vmin, the output voltage Vo2 of the second operational amplifier 120 is GND, the output voltage Vo3 of the third operational amplifier 130 is GND, and the output voltage Vo4 of the fourth operational amplifier 140 is Vo2 - Vo3, i.e. the control signal output by the crosstalk detection module 100 is a low-level signal L.

[0070] When the display panel 20 has no crosstalk or slight crosstalk, Vmin < Vo < Vmax, the output voltage Vo2 of the second operational amplifier 120 is V H , the output voltage Vo3 of the third operational amplifier 130 is GND, and the output voltage Vo4 of the fourth operational amplifier 140 is Vo2 - Vo3, i.e. the control signal output by the crosstalk detection module 100 is a high-level signal H.

[0071] The crosstalk detection module 100 detects the measured voltage of the common electrode through four operational amplifiers, and has a simple structure, which can reduce the manufacturing cost of the display driving circuit 10.

[0072] In some embodiments, the crosstalk detection module 100 further comprises a first inverter 150, the input end of the first inverter 150 is connected with the output end of the fourth operational amplifier 140, and the output end of the first inverter 150 is the output end of the crosstalk detection module 100.

[0073] The first inverter 150 can invert the control signal output by the fourth operational amplifier 140, and when the crosstalk of the display panel 20 is serious, the control signal output by the crosstalk detection module 100 is a high-level signal H, and when the display panel 20 has no crosstalk or slight crosstalk, the control signal output by the crosstalk detection module 100 is a low-level signal L.

[0074] In some embodiments, the crosstalk detection module 100 further comprises a temperature-sensitive resistor 160 and an AND logic gate 170, the first input end of the AND logic gate 170 is connected with the output end of the fourth operational amplifier 140 through the first inverter 150, the second input end of the AND logic gate 170 is connected with the sixth power supply 506 through the temperature-sensitive resistor 160, and the voltage V H of the sixth power supply 506 is equal to the voltage of the high-level signal H.

[0075] Referring to Figure 5 As shown in FIG. 1, the resistance value of the temperature-sensitive resistor 160 is negatively related to the ambient temperature. When the ambient temperature rises, the resistance value of the temperature-sensitive resistor 160 decreases, and the voltage at the second input end of the AND logic device 170 is approximately equal to the voltage of the low-level signal L. When the ambient temperature decreases, the resistance value of the temperature-sensitive resistor 160 increases, and the voltage at the second input end of the AND logic device 170 is approximately equal to the voltage of the high-level signal H. H As shown in FIG. 1, the resistance value of the temperature-sensitive resistor 160 is negatively related to the ambient temperature. When the ambient temperature rises, the resistance value of the temperature-sensitive resistor 160 decreases, and the voltage at the second input end of the AND logic device 170 is approximately equal to the voltage of the low-level signal L. When the ambient temperature decreases, the resistance value of the temperature-sensitive resistor 160 increases, and the voltage at the second input end of the AND logic device 170 is approximately equal to the voltage of the high-level signal H.

[0076] The display panel 20 displays the same picture. When the ambient temperature is relatively high, the crosstalk of the display panel 20 is relatively more serious, and when the ambient temperature is relatively low, the crosstalk of the display panel 20 is relatively less serious. By arranging the temperature-sensitive resistor 160 and the AND logic device 170, the control signal of the picture crosstalk detection module 100 is adjusted according to the ambient temperature, and the refresh rate is reduced when the ambient temperature is relatively high, so that the crosstalk can be improved or eliminated, and the display quality of the display panel 20 is improved.

[0077] Embodiment Two

[0078] The difference between Embodiment Two and Embodiment One is that the structure of the refresh rate adjustment module 200 and the position in the display driving circuit 10 are different.

[0079] Referring to Figure 6 As shown in FIG. 2, the refresh rate adjustment module 200 is connected between the gate driving circuit 300 and the scanning line of the display panel 20. The refresh rate adjustment module 200 includes a first transistor 210 and a second transistor 220. The control end of the first transistor 210 and the control end of the second transistor 220 are connected with the picture crosstalk detection module 100. The first end of the first transistor 210 is connected with the gate driving circuit 300. The second end of the first transistor 210 is connected with the scanning line. The first end of the second transistor 220 is connected with the first power supply 501. The second end of the second transistor 220 is connected with the scanning line.

[0080] The gate driving circuit 300 includes a gate driving chip and an array substrate row driving circuit, which can be arranged on the display panel 20. The channel types of the first transistor 210 and the second transistor 220 are different. For example, the first transistor 210 can be a P-channel transistor, and the second transistor 220 can be an N-channel transistor. The first power supply 501 provides a control signal for turning off the driving transistor connected with the scanning line. For example, the driving transistor connected with the scanning line is an N-channel thin film transistor, and the control signal provided by the first power supply 501 is a low-level signal L.

[0081] When the display picture has no crosstalk or slight crosstalk, the control signal output by the picture crosstalk detection module 100 is a low-level signal L, the first transistor 210 is turned on and the second transistor 220 is turned off, the scan signal of the gate drive circuit 300 can be output to the upper scan line, that is, the refresh rate adjustment module 200 maintains the refresh rate of the display panel 20 unchanged.

[0082] When the display picture has severe crosstalk, the control signal output by the picture crosstalk detection module 100 is a high-level signal H, the first transistor 210 is turned off and the second transistor 220 is turned on, the scan signal of the gate drive circuit 300 cannot be output to the scan line, and the first power supply 501 outputs a low-level signal L to turn off the driving transistor connected to the scan line, so that the data voltage provided by the data line cannot be written to the pixel electrode, and the brightness of the sub-pixel remains unchanged until the common voltage is restored, that is, the refresh rate adjustment module 200 reduces the refresh rate of the display panel 20.

[0083] It should be noted that the gate drive circuit 300 can include a plurality of array substrate row drive circuits, each array substrate row drive circuit being connected to at least one scan line. The picture crosstalk detection module 100 can be correspondingly provided with a plurality of picture crosstalk detection modules 100, each picture crosstalk detection module 100 being used to detect a display area controlled by at least one array substrate row drive circuit. In this way, different display areas of the display panel 20 can have different refresh rates.

[0084] Embodiment three

[0085] Referring to Figure 7 In this embodiment, the display device includes the display driving circuit 10 and the display panel 20 disclosed in Embodiment One or Embodiment Two, and the display panel 20 is connected to the display driving circuit 10.

[0086] The display device includes the display driving circuit 10, the display driving circuit 10 includes the picture crosstalk detection module 100, the refresh rate adjustment module 200 and the gate drive circuit 300, the gate drive circuit 300 is used to connect the scan line of the display panel 20, the refresh rate adjustment module 200 is connected to the end of the gate drive circuit 300 away from the scan line, and controls the refresh rate of the display panel 20 by controlling the scan signal generated by the gate drive circuit 300, or the refresh rate adjustment module 200 is connected between the gate drive circuit 300 and the scan line, and controls the refresh rate of the display panel 20 by controlling the output of the scan signal, the picture crosstalk detection module 100 is connected to the refresh rate adjustment module 200, and is used to detect the crosstalk of the display picture of the display panel 20, and controls the refresh rate adjustment module 200 to adjust the refresh rate of the display panel 20 according to the severity of the crosstalk, so that the refresh rate is negatively correlated with the severity of the crosstalk. When the display picture crosstalk is severe, the refresh rate is reduced, the common voltage recovery time is prolonged, the crosstalk is improved or eliminated, and the display quality of the display panel 20 and the display device is improved.

[0087] The terms "first", "second", etc. are used only for the purpose of description, and should not be understood as indicating or implying relative importance or implying a number of the technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0088] In the present application, unless otherwise explicitly specified and limited, the terms "assembly", "connection" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0089] In the description of the present application, the description referring to the terms "some embodiments", "exemplarily" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are contained in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples, without contradiction.

[0090] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application. Therefore, any changes or modifications made according to the claims and description of the present application shall be within the scope of the present application.

Claims

1. A display driving circuit, comprising a gate driving circuit, wherein the gate driving circuit is used to connect a scan line of a display panel, characterized in that: The display driving circuit further includes: a refresh rate adjustment module, the refresh rate adjustment module being connected to an end of the gate drive circuit away from the scan line and controlling the refresh rate of the display panel by controlling the scan signal generated by the gate drive circuit, or the refresh rate adjustment module being connected between the gate drive circuit and the scan line and controlling the refresh rate of the display panel by controlling the output of the scan signal; A screen crosstalk detection module is connected to the refresh rate adjustment module. The screen crosstalk detection module is used to detect the crosstalk of the display screen of the display panel and control the refresh rate adjustment module to adjust the refresh rate of the display panel according to the severity of the crosstalk, so that the refresh rate is negatively correlated with the severity of the crosstalk.

2. The display driving circuit according to claim 1, wherein: The refresh rate adjustment module is connected to the gate driving circuit at one end away from the scanning line, and the refresh rate adjustment module is a timing controller.

3. The display driving circuit according to claim 2, wherein: The display driving circuit also includes a data signal processing module, which includes a sampling unit and a selection unit. The selection unit is connected to the system-level chip, the timing controller and the screen crosstalk detection module. When the refresh rate of the display panel remains unchanged, the screen crosstalk detection module controls the selection unit to operate so that the system-level chip is directly connected to the timing controller. When the refresh rate of the display panel decreases, the screen crosstalk detection module controls the selection unit to operate so that the system-level chip is indirectly connected to the timing controller through the sampling unit. The data signal output by the system-level chip includes m frames of display pictures, and the sampling unit is used to extract part of the m frames of display pictures and output it to the timing controller.

4. The display driving circuit according to claim 3, wherein: The n-th frame display picture extracted by the sampling unit is composed of a part of the data signal of the n-1-th frame display picture and a part of the data signal of the n+1-th frame display picture.

5. The display driving circuit according to claim 1, wherein: The refresh rate adjustment module is connected between the gate drive circuit and the scan line. The refresh rate adjustment module includes a first transistor and a second transistor. The control end of the first transistor and the control end of the second transistor are both connected to the screen crosstalk detection module. The first end of the first transistor is connected to the gate drive circuit, the second end of the first transistor is connected to the scan line, the first end of the second transistor is connected to the first power supply, and the second end of the second transistor is connected to the scan line. The channel types of the first transistor and the second transistor are different. The first power supply provides a control voltage for turning off the drive transistor connected to the scan line.

6. The display driving circuit according to claim 1, wherein: The screen crosstalk detection module is connected to the system-on-chip, and the screen crosstalk detection module determines the severity of the crosstalk of the display screen according to the data signal output by the system-on-chip.

7. The display driving circuit according to claim 1, wherein: The screen crosstalk detection module is connected to the common electrode of the display panel, and determines the severity of the crosstalk of the display screen according to the deviation of the measured voltage of the common electrode from the set voltage of the common electrode.

8. The display driving circuit according to claim 7, wherein: The screen crosstalk detection module includes a first operational amplifier, a second operational amplifier, a third operational amplifier, and a fourth operational amplifier. The non-inverting input of the first operational amplifier is connected to the common electrode of the display panel, the inverting input of the first operational amplifier is connected to the second power supply, the second power supply provides a set voltage for the common electrode, the non-inverting input of the second operational amplifier is connected to the third power supply, the inverting input of the second operational amplifier is connected to the output of the first operational amplifier, the non-inverting input of the third operational amplifier is connected to the fourth power supply, the inverting input of the third operational amplifier is connected to the output of the first operational amplifier, one power input of the second operational amplifier and the third operational amplifier is connected to a fifth power supply, the voltage of the fifth power supply is equal to the voltage of a high-level signal, the other power input of the second operational amplifier and the third operational amplifier is grounded, the third power supply provides an upper limit voltage when the refresh rate of the display panel is reduced, the fourth power supply provides a lower limit voltage when the refresh rate of the display panel is reduced, the non-inverting input of the fourth operational amplifier is connected to the output of the second operational amplifier, the inverting input of the fourth operational amplifier is connected to the output of the third operational amplifier, and the output of the fourth operational amplifier is connected to the refresh rate adjustment module.

9. The display driving circuit according to claim 8, wherein: The screen crosstalk detection module also includes a first inverter, a temperature-sensitive resistor and an AND gate logic device. The first input end of the AND gate logic device is connected to the output end of the fourth operational amplifier through the first inverter, and the second input end of the AND gate logic device is connected to the sixth power supply through the temperature-sensitive resistor. The voltage of the sixth power supply is equal to the voltage of the high-level signal.

10. A display device, characterized in that: include: The display driving circuit according to any one of claims 1 to 9; The display panel is connected to the display driving circuit.

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