Disclosure of Invention
The application aims to provide a driving circuit, a driving method and a display device capable of improving crosstalk and improving display effect.
The application discloses a driving circuit which is used for driving a display panel and comprises a leakage current generating module and a grid low-voltage output module, wherein the leakage current generating module is connected with any one data line in the display panel, generates leakage current and outputs the leakage current to the connected data line, the grid low-voltage output module is connected with the leakage current generating module and generates grid low voltage based on the current value of the leakage current generated by the leakage current generating module, and the grid low-voltage output module determines the voltage value of the grid low voltage output to the grid line of the display panel based on the current value of the leakage current generated by the leakage current generating module so as to generate a corresponding grid low-voltage driving signal to output to the grid line of the display panel, and adjusts the current value of the leakage current on the data line in the display panel to the minimum value.
The grid low-voltage output module comprises a filtering unit, a current amplifying unit, a resistor voltage dividing unit and a power chip, wherein a control end of the first thin film transistor is connected with the power chip, an input end of the first thin film transistor is connected with any one of data lines in a display panel, an output end of the first thin film transistor is connected with an input end of the filtering unit, an output end of the filtering unit is connected with an input end of the current amplifying unit, filtered leakage current is output to the current amplifying unit, an output end of the current amplifying unit is connected with an input end of the resistor voltage dividing unit, amplified leakage current is output to the resistor voltage dividing unit, an output end of the resistor voltage dividing unit is connected with the power chip, divided voltage is output to the power chip, the first thin film transistor is formed in the same process as the thin film transistor in a pixel, the model is the same, the generated leakage current value is equal, and the power chip generates a corresponding grid low-voltage driving signal based on the divided voltage and outputs the generated leakage current value to the grid low-voltage driving signal to the grid line of the display panel, so that the current value in the display panel is the minimum.
The grid low-voltage output module comprises a drain current adding unit, a filtering unit, a current amplifying unit, a resistor voltage dividing unit and a power chip, wherein two data lines which are close to two sides of a display panel are respectively a first data line and an n-th data line along the scanning direction of the scanning line of the display panel, the control end of the first thin film transistor and the control end of the second thin film transistor are respectively connected with the power chip, the input end of the first thin film transistor is connected with the first data line in the display panel, the input end of the second thin film transistor is connected with the n-th data line in the display panel, the output end of the first thin film transistor and the output end of the second thin film transistor are respectively connected with the drain current adding unit, the drain current adding unit calculates drain currents collected from the first thin film transistor and the second thin film transistor, the output end of the adding unit is connected with the filtering unit, the input end of the drain current is connected with the first data line in the display panel, the input end of the second thin film transistor is connected with the output end of the resistor voltage dividing unit, the drain current is equal to the voltage dividing unit, the drain current is formed by the voltage dividing unit, the drain current is equal to the voltage dividing unit, the drain current is connected with the resistor voltage dividing unit, the drain current is connected with the drain current adding unit, the drain current is. The power chip generates a corresponding grid low-voltage driving signal based on the divided voltage and outputs the signal to a grid line of the display panel so as to enable a drain current value on a data line in the display panel to be minimum.
Optionally, the leakage current generating module includes a pixel unit, the gate low voltage output module includes a voltage storage unit, a switch control unit and a power chip, an input end of the switch control unit is connected with the pixel unit through a data line, and controls the leakage current output from the pixel unit to the data line to be input to the voltage storage unit, and the power chip generates a corresponding gate low voltage driving signal according to the voltage value stored in the voltage storage unit and outputs the signal to the gate line of the display panel, so that the leakage current value on the data line in the display panel is minimum.
Optionally, the driving circuit further includes a temperature detection module and a brightness detection module, the temperature detection module and the brightness detection module are respectively connected with the current amplification unit, the temperature detection module is used for detecting a temperature value of the display panel in real time, controlling an amplification factor of the current amplification unit on the leakage current through the temperature value, and the brightness detection module is used for detecting a brightness value of the display panel in real time, and controlling the amplification factor of the current amplification unit on the leakage current through the brightness value.
The selective leakage current generating module comprises a first thin film transistor and a second thin film transistor, wherein the grid low-voltage output module comprises a leakage current input control unit, a filtering unit, a current amplifying unit, a resistor voltage dividing unit and a power chip, two data lines which are close to two sides of the display panel are respectively a first data line and an n-th data line along the scanning direction of the scanning line of the display panel, the leakage current input control unit comprises a time sequence control circuit, a first switch and a second switch, the time sequence control circuit outputs a switch control signal to control the conduction of the first switch and the second switch, the first switch is conducted at a low level, the second switch is turned off at a high level, the second switch is conducted at a high level, the control end of the first thin film transistor is connected with the power chip through the first switch, the control end of the second thin film transistor is connected with the power chip through the first switch, the input end of the first thin film transistor is connected with the first data line in the display panel, the second switch control signal is connected with the conduction of the first switch and the second switch, the first switch is connected with the voltage dividing unit, the second switch is connected with the voltage dividing unit, the voltage dividing unit is connected with the input end of the voltage dividing unit, the voltage dividing unit is connected with the output end of the filter unit, the voltage dividing unit is connected with the output unit, the output unit is connected with the output end of the output unit, the first thin film transistor and the second thin film transistor are formed in the same manufacturing process with the thin film transistors in the pixels, the types and the sizes of the thin film transistors are the same, the generated leakage current values are the same, the power chip generates corresponding grid low-voltage driving signals based on voltages obtained by filtering, amplifying and dividing leakage currents generated by different thin film transistors and outputs the grid low-voltage driving signals to the grid lines of the display panel, and therefore the leakage current values of the data lines in the display panel in different time are the smallest.
Optionally, the driving circuit further includes a storage module, a first lookup table formed based on a relation curve of the leakage current value and the gate low voltage is stored in the storage module, and the gate low voltage output module determines the voltage value of the gate low voltage output to the gate line of the display panel based on the current value of the leakage current generated by the leakage current generating module.
The application also discloses a driving method for driving the display panel by the driving circuit, which comprises the following steps:
Acquiring a current value of a leakage current on a data line in a display panel;
And determining the voltage value of the grid low voltage output to the grid line of the display panel according to the current value of the leakage current so as to generate a corresponding grid low voltage driving signal to be output to the grid line of the display panel, and adjusting the current value of the leakage current on the data line in the display panel to the minimum value.
Optionally, the leakage current generating module includes a pixel unit, the gate low voltage output module includes a voltage storage unit, a switch control unit and a power chip, and an input end of the switch control unit is connected with the pixel unit through a data line;
The step of obtaining the current value of the leakage current on the data line in the display panel comprises the following steps:
in the first time period, outputting unadjusted grid low voltage to a grid line of the display panel, outputting a gray-scale data signal corresponding to a white picture to a data line, and controlling the switch control unit to be turned off;
In a second time period, outputting unadjusted grid high voltage to a grid line of the display panel, outputting a zero gray scale data signal to a data line, and controlling the switch control unit to conduct so as to obtain leakage current on the data line in the display panel;
The step of determining the voltage value of the gate low voltage output to the gate line of the display panel according to the detected current value of the leakage current to generate a corresponding gate low voltage driving signal to output to the gate line of the display panel, and adjusting the current value of the leakage current on the data line in the display panel to the minimum value includes:
in a second time period, the voltage storage unit receives leakage current on the data line and converts the leakage current into a corresponding voltage value;
After a preset time, determining a voltage value of the grid low voltage output to the grid line of the display panel based on the voltage value of the voltage storage unit so as to generate a corresponding grid low voltage driving signal to be output to the grid line of the display panel, and adjusting a current value of the leakage current on the data line in the display panel to be the minimum value.
The application also discloses a display device which comprises a display panel and the driving circuit, wherein the driving circuit drives the display panel by using the driving method.
Compared with the scheme of adjusting the data voltage to improve the crosstalk problem, the application provides the driving circuit, the current value of the leakage current on the data line in the display panel is obtained, the voltage value of the grid low voltage output to the grid line of the display panel is determined according to the current value of the leakage current, so that the corresponding grid low voltage driving signal is generated and output to the grid line of the display panel, the current value of the leakage current on the data line in the display panel is adjusted to the minimum value, and the crosstalk problem is improved by reducing the leakage current value when the display panel displays, so that the display effect is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is evident that the figures in the following description are only some embodiments of the application, from which other figures can be obtained without inventive effort for a person skilled in the art. In the drawings:
fig. 1 is a schematic structural view of a display panel and a driving circuit in a first embodiment of the present application;
fig. 2 is a schematic structural view of a display panel and a driving circuit in a second embodiment of the present application;
Fig. 3 is a schematic structural view of a display panel and a driving circuit in a third embodiment of the present application;
Fig. 4 is a schematic structural view of a display panel and a driving circuit in a fourth embodiment of the present application;
fig. 5 is a schematic diagram of another display panel and a driving circuit in a fourth embodiment of the present application;
fig. 6 is a schematic structural view of a display panel and a driving circuit in a fifth embodiment of the present application;
fig. 7 is a graph showing the relationship between the gate low voltage and the leakage current in the fifth embodiment of the present application;
fig. 8 is a schematic structural view of a display panel and a driving circuit in a sixth embodiment of the present application;
fig. 9 is a schematic diagram of another display panel and a driving circuit according to a sixth embodiment of the present application;
Fig. 10 is a flow chart of a driving method according to a seventh embodiment of the present application;
FIG. 11 is a schematic flow chart of a driving method according to an eighth embodiment of the present application;
fig. 12 is a schematic structural view of a display device according to a ninth embodiment of the present application.
100 Parts of driving circuit, 110 parts of leakage current generating module, 111 parts of first thin film transistor, 112 parts of second thin film transistor, 113 parts of pixel unit, 120 parts of grid low voltage output module, 121 parts of filter unit, 122 parts of current amplifying unit, 123 parts of resistance voltage dividing unit, 124 parts of power supply chip, 125 parts of leakage current adding unit, 126 parts of leakage current input control unit, 1261 parts of time sequence control circuit, 127 parts of voltage storage unit, 128 parts of switch control unit, 130 parts of temperature detecting module, 140 parts of brightness detecting module, 150 parts of storage module, 160 parts of control board, 170 parts of flip-chip film, 200 parts of display panel, 210 parts of display area, 220 parts of non-display area, 300 parts of display device;
the first data line-S1, the nth data line-Sn, the gate lines-G1-Gn, the gate low voltage-VGL, the gate high voltage-VGH, the first switch-Q1, the second switch-Q2, the capacitor-C and the first control switch-T1.
Detailed Description
It is to be understood that the terminology used herein, the specific structural and functional details disclosed are merely representative for the purpose of describing particular embodiments, but that the application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
The application is described in detail below with reference to the attached drawings and alternative embodiments.
Referring to fig. 1, as a first embodiment of the present application, a driving circuit 100 is disclosed, wherein the driving circuit 100 is used for driving a display panel 200, the driving circuit 100 includes a leakage current generating module 110 and a gate low voltage output module 120, the leakage current generating module 110 is connected with any one of the data lines in the display panel 200, generates a leakage current and outputs the leakage current to the connected data line, the gate low voltage output module 120 is connected with the leakage current generating module 110, generates a gate low voltage based on the current value of the leakage current generated by the leakage current generating module 110, wherein the gate low voltage output module 120 determines the voltage value of the gate low voltage output to the gate line of the display panel 200 based on the current value of the leakage current generated by the leakage current generating module 110, so as to generate a corresponding gate low voltage driving signal to output to the gate line of the display panel 200, and adjusts the current value of the leakage current on the data line in the display panel 200 to a minimum value.
Considering that the leakage current of the data line can cause unexpected flow of charges between adjacent pixels to cause uneven brightness in the vertical direction (namely vertical crosstalk), the application mainly adjusts the gate low voltage VGL dynamically to directly inhibit the leakage of the data line and eliminate the cause of crosstalk from the source, and specifically, obtains or detects the leakage current value on the data line by accessing the data line, determines the voltage value of the gate low voltage output to the gate line of the display panel 200 based on the current value of the leakage current generated by the leakage current generating module 110 to generate a corresponding gate low voltage driving signal to output to the gate line of the display panel 200, adjusts the current value of the leakage current on the data line in the display panel 200 to the minimum value, minimizes the leakage current to reduce the invalid power loss, improves the crosstalk problem and improves the display effect; in addition, the present application detects the leakage current in real time, and the environmental changes, such as temperature and illumination intensity, have an influence on the characteristic curves of the thin film transistors (Thin Film Transistor, TFT), that is, the optimal gate low voltage VGL is different under different environments, so it is considered to synchronously adjust the gate low voltage VGL when the environment changes, wherein the leakage current corresponding to the selected gate low voltage VGL is the minimum value, and the gate low voltage VGL at this time is the optimal gate low voltage VGL.
Referring to fig. 2, as a second embodiment of the present application, the leakage current generating module 110 includes a first thin film transistor 111, the gate low voltage output module 120 includes a filter unit 121, a current amplifying unit 122, a resistor voltage dividing unit 123 and a power chip 124, the control end of the first thin film transistor 111 is connected to the power chip 124, the input end is connected to any one of the data lines in the display panel 200, the output end is connected to the input end of the filter unit 121, the output end of the filter unit 121 is connected to the input end of the current amplifying unit 122, the filtered leakage current is output to the current amplifying unit 122, the output end of the current amplifying unit 122 is connected to the input end of the resistor voltage dividing unit 123, the amplified leakage current is output to the resistor voltage dividing unit 123, the output end of the resistor voltage dividing unit 123 is connected to the power chip 124, the divided voltage is output to the power chip 124, wherein the first thin film transistor 111 and the pixel form a thin film with the same size as the data line in the display panel, the voltage is generated by the same magnitude as the voltage of the data line in the display panel, and the voltage is equal to the voltage of the display panel is generated by the voltage of the voltage dividing unit 200.
In this embodiment, during the process of the display panel 200, the thin film transistor in the display panel 200 and the first thin film transistor 111 are formed by the same process, the leakage current of the first thin film transistor 111 represents the leakage current of the thin film transistor in the display panel 200, the first thin film transistor 111 is disposed in the non-display area 220 of the display panel 200, which is equivalent to pulling out the thin film transistor in the display panel 200 to detect the leakage current of the thin film transistor, the first thin film transistor 111 is disposed at the edge of the non-display area 220 of the display panel 200, the control end of the first thin film transistor 111 is connected with the power Chip 124, the gate low voltage driving signal outputted by the power Chip 124 is received, the input end of the first thin film transistor 111 is connected On the data line, the current outputted by the output end is the leakage current Ioff, the outputted leakage current is inputted to the control board 160 through the flip Chip 170 (Chip On Flex, chip), the filter unit 121, the current amplifying unit 122, the resistor divider unit 123 and the power Chip 124 are all disposed On the control board 160, the leakage current Ioff is inputted to the control board 160, the control board is high, the voltage is required to be filtered off the voltage is reduced by the feedback voltage of the minimum value of the power Chip 124, and the voltage is required to be adjusted to be lower the maximum after the voltage is reduced.
As shown in fig. 3, as a third embodiment of the present application, the first embodiment is further refined and improved, and unlike the second embodiment, the leakage current generating module 110 includes a first thin film transistor 111 and a second thin film transistor 112, and the gate low voltage output module 120 includes a leakage current adding unit 125, a filtering unit 121, a current amplifying unit 122, a resistor voltage dividing unit 123, and a power chip 124; the two data lines near the two sides of the display panel 200 are respectively a first data line and an nth data line along the scanning direction of the scanning line of the display panel 200, the control end of the first thin film transistor 111 and the control end of the second thin film transistor 112 are respectively connected with the power chip 124, the input end of the first thin film transistor 111 is connected with the first data line in the display panel 200, the input end of the second thin film transistor 112 is connected with the nth data line in the display panel 200, the output end of the first thin film transistor 111 and the output end of the second thin film transistor 112 are respectively connected with the leakage current adding unit 125, the leakage current adding unit 125 adds the leakage currents collected from the first thin film transistor 111 and the second thin film transistor, the output end of the leakage current adding unit 125 is connected with the input end of the filtering unit 121, the output end of the filtering unit is connected with the input end of the current amplifying unit 122, the output filtered leakage current is connected with the current amplifying unit 122, the output end of the output unit 123 is connected with the voltage dividing resistor 123, the voltage dividing unit 123 is connected with the voltage dividing resistor 123, the first thin film transistor 111 and the second thin film transistor 112 are formed in the same process and have the same model size, and the generated leakage current values are equal, and the power chip 124 generates a corresponding gate low voltage driving signal based on the divided voltage and outputs the signal to the gate line of the display panel 200, so that the leakage current value on the data line in the display panel 200 is minimum.
In this embodiment, considering that the detection of two ends can measure the situation of the whole OC, when the display panel 200 is large, the environments of the left end and the right end may be different, so the gate low voltage VGL may take a middle value to minimize the leakage current added up by the left end and the right end, so a thin film transistor TFT, that is, a first thin film transistor 111 and a second thin film transistor 112, are respectively added to two ends of the display panel 200, the control ends of the two transistors are connected to the power chip 124, and receive the VGL output by the power chip 124, the input ends are respectively connected to the data lines at two ends, the current output by the other end is the leakage current Ioff, and the output leakage current is input to the control board 160 through the COF. The TFTs at both ends of the display panel 200 are added to the control board 160, so as to prevent the two ends of the panel from being heated and illuminated unevenly, and the addition is performed to detect the leakage current of the whole panel. The leakage current Ioff is filtered to remove high-frequency noise, the leakage current Ioff of a single TFT is small and can be detected after amplification, then the voltage obtained by the resistor is fed back to a POWER chip 124 (POWER IC) by utilizing resistor voltage division, the larger the voltage is, the larger the leakage current is, and the voltage value of the low-voltage VGL of the grid electrode is regulated after the POWER IC detects the feedback voltage so as to minimize the leakage current.
As shown in fig. 4, which is a further refinement and improvement of the first embodiment of the present application, unlike the third embodiment, the leakage current generating module 110 shown in fig. 4 includes a first thin film transistor 111 and a second thin film transistor 112, the low-voltage output module 120 includes a leakage current input control unit 126, a filter unit 121, a current amplifying unit 122, a resistor dividing unit 123 and a power chip 124, two data lines along the scan line of the display panel 200 are respectively a first data line and an n-th data line, the leakage current input control unit 126 includes a timing control circuit 1261, a first switch and a second switch, the timing control circuit 1261 outputs a switch control signal to control the first switch and the second switch to be turned on, the first switch is turned on at a low level, the second switch is turned off at a high level, the first thin film transistor 111 is turned on at a high level, the first thin film transistor 111 control terminal is connected to the first thin film transistor chip 112 through the first data line and the first thin film transistor 111 and the second thin film transistor 111 is connected to the first thin film transistor 112 through the first thin film transistor chip control terminal 121, the second thin film transistor control unit 111 is connected to the second thin film transistor control terminal 112 through the first thin film transistor chip control terminal 112, the output end of the current amplifying unit 122 is connected with the input end of the resistor voltage dividing unit 123, the amplified leakage current is output to the resistor voltage dividing unit 123, the output end of the resistor voltage dividing unit 123 is connected with the power chip 124, and the divided voltage is output to the power chip 124.
The first thin film transistor 111 and the second thin film transistor 112 are formed in the same process and have the same model size, the generated leakage current values are equal, and the power chip 124 generates corresponding gate low voltage driving signals based on the voltages generated by the different thin film transistors after filtering, amplifying and dividing the leakage current values, and outputs the signals to the gate lines of the display panel 200, so that the leakage current values of the data lines in the display panel 200 in different times are minimized.
In this embodiment, two thin film transistors are added to two ends of the display panel 200, the two thin film transistors are controlled independently, VGL values corresponding to minimum leakage currents are generated in different periods of time, in a first period of time, the timing control circuit 1261 outputs a switch control signal to control the first switch Q1 to be turned on, the second switch Q2 is turned off, leakage currents on a first data line on the left side are filtered by the filtering unit 121 and then output to the current amplifying unit 122, the current amplifying unit 122 amplifies the filtered leakage currents and outputs the filtered leakage currents to the resistor voltage dividing unit 123, an output end of the resistor voltage dividing unit 123 is connected with the power chip 124, divided voltages are output to the power chip 124, and the power chip 124 generates corresponding grid low voltage driving signals based on the voltages generated by the leakage currents generated by the different thin film transistors and outputs the grid low voltage driving signals to the grid lines of the display panel 200, so that the leakage current value of the data line in the display panel 200 is minimum; in a second period, the timing control circuit 1261 outputs a switch control signal to control the first switch to be turned off, the second switch to be turned on, the leakage current on the n-th data line on the right side is filtered by the filtering unit 121 and then output to the current amplifying unit 122, the current amplifying unit 122 amplifies the filtered leakage current and outputs the filtered leakage current to the resistor voltage dividing unit 123, the output end of the resistor voltage dividing unit 123 is connected with the power chip 124, the voltage after voltage division is output to the power chip 124, and the power chip 124 performs filtering, amplifying, and operation based on the leakage currents generated by different thin film transistors, the divided voltage generates a corresponding gate low voltage driving signal to be outputted to the gate line of the display panel 200, so as to minimize the leakage current value of the data line in the display panel 200.
Referring to fig. 6, as a fifth embodiment of the present application, the second to fourth embodiments are further refined and perfected, referring to fig. 6 and 7, the driving circuit 100 further includes a storage module 150, the storage module 150 stores a first lookup table formed based on a relationship curve between a leakage current value and a gate low voltage (in fig. 7, an abscissa represents a gate low voltage input to a gate line and an ordinate represents a current value Ioff of a corresponding leakage current), the gate low voltage output module 120 determines a voltage value of the gate low voltage output to the gate line of the display panel 200 based on the current value of the leakage current generated by the leakage current generating module 110, and after obtaining the current value of the leakage current, the optimal gate low voltage VGL can be known by a table lookup method, and the optimal gate low voltage VGL is found and a corresponding gate low voltage driving signal is generated and output to the gate line in the display panel 200, so that the leakage current on the data line is minimum.
In addition, the driving circuit 100 further includes a temperature detecting module 130 and a brightness detecting module 140, where the temperature detecting module 130 and the brightness detecting module 140 are respectively connected to the current amplifying unit 122, the temperature detecting module 130 is configured to detect a temperature value of the display panel 200 in real time, and control an amplification factor of the current amplifying unit 122 to the leakage current through the temperature value, the brightness detecting module 140 is configured to detect a brightness value of the display panel 200 in real time, and control the amplification factor of the current amplifying unit 122 to the leakage current through the brightness value, and considering that both the temperature and the illumination affect the leakage current, although the obtained real-time leakage current is equal to the leakage current after the temperature or illumination has been affected, in consideration of that the temperature or illumination is strong, the current value of the leakage current is relatively large, so that when the temperature or the brightness value controls the amplification factor of the current amplifying unit 122 to the leakage current, the temperature value is prevented from being excessively large, the maximum limit of the current amplifying unit 122 is exceeded when the temperature is amplified, and the amplified result is not caused, and the detected TFT voltage of the TFT is adjusted to be the same as the TFT when the temperature of the TFT is low, and the voltage of the TFT is enabled to display at the lowest.
Referring to fig. 8, as a further refinement and improvement of the first embodiment of the present application, referring to fig. 8 and 9, the leakage current generating module 110 includes a pixel unit 113, the gate low voltage output module 120 includes a voltage storage unit 127, a switch control unit 128, and a power supply chip 124, an input end of the switch control unit 128 is connected to the pixel unit 113 through a data line, and controls a leakage current output from the pixel unit 113 to the data line to be input to the voltage storage unit 127, and the power supply chip 124 generates a corresponding gate low voltage driving signal according to a voltage value stored in the voltage storage unit 127 to be output to a gate line of the display panel 200 so as to minimize a leakage current value on the data line in the display panel 200, wherein the voltage storage unit 127 includes a capacitor, and the switch control unit 128 includes a first control switch.
In this embodiment, unlike the second embodiment described above, the leakage current corresponding to the pixel unit 113 is directly collected, the leakage current on the data line is introduced into the voltage storage unit 127 on the control board 160, and converted into the corresponding voltage value, and the power chip 124 adjusts VGL according to the capacitance voltage in the voltage storage unit 127 to minimize the leakage current on the data line, thereby improving the vertical crosstalk problem.
As a seventh embodiment of the present application, as shown in fig. 10, there is disclosed a driving method for the driving circuit 100 according to any of the above embodiments to drive the display panel 200, the driving method comprising:
S1, acquiring a current value of leakage current on a data line in a display panel;
And S2, determining the voltage value of the grid low voltage output to the grid line of the display panel according to the current value of the leakage current so as to generate a corresponding grid low voltage driving signal to be output to the grid line of the display panel, and adjusting the current value of the leakage current on the data line in the display panel 200 to the minimum value.
Referring to fig. 1 and 10, in the present embodiment, the driving method is based on the driving circuit 100 to drive the display panel 200, and by monitoring the leakage current on the data line in real time, the system can dynamically sense the leakage state of the pixel circuit, dynamically adjust the voltage value of the low voltage of the gate based on the current value of the leakage current, so that the off state of the pixel circuit is close to the theoretical optimal value, and the leakage current is minimized.
As shown in reference to fig. 11, as an eighth embodiment of the present application, there is disclosed a driving method mainly used for the driving circuit 100 in the fifth embodiment, the leakage current generating module 110 includes a pixel unit 113, the gate low voltage output module 120 includes a voltage storage unit 127, a switch control unit 128, and a power chip 124, an input terminal of the switch control unit 128 is connected to the pixel unit 113 through a data line, and referring to fig. 8, 9, and 11, the step S1 includes:
S11, outputting unadjusted grid low voltage to a grid line of the display panel 200 and outputting a gray scale data signal corresponding to a white picture to a data line in a first time period, and controlling the switch control unit 128 to be turned off;
s12, outputting unadjusted grid high voltage to a grid line of the display panel 200 and outputting a zero gray scale data signal to a data line in a second time period, and controlling the switch control unit 128 to conduct so as to obtain leakage current on the data line in the display panel 200;
the step S2 includes:
S21, in a second time period, the voltage storage unit receives leakage current on the data line and converts the leakage current into a corresponding voltage value;
And S22, after the preset time, determining the voltage value of the grid low voltage output to the grid line of the display panel 200 based on the voltage value of the voltage storage unit so as to generate a corresponding grid low voltage driving signal to be output to the grid line of the display panel 200, and adjusting the current value of the leakage current on the data line in the display panel 200 to the minimum value.
In this embodiment, in a first period, any data line on the display panel 200 is led back to the control board 160 to charge the capacitor, and meanwhile, the line passes through the control switch unit, so that the grid output grid low voltage VGL of the panel is first enabled, the data line outputs a white picture, at this time, the storage capacitor is charged under the influence of leakage current, the switch control unit 128 on the control board 160 is in an off state, the grid output grid high voltage VGH of the panel is enabled, the data line outputs 0, the switch control unit 128 on the control board 160 is in an on state, the charge of the storage capacitor flows to the capacitor on the control board 160, after a preset time, the POWER IC detects the voltage of the capacitor, the larger the voltage represents the larger the leakage current, and thus the POWER IC adjusts the grid low voltage VGL according to the capacitance voltage to minimize the leakage current.
As a ninth embodiment of the present application, as shown in fig. 12, a display device 300 is disclosed, the display device 300 including a display panel 200 and the driving circuit 100 as described in any one of the above, the driving circuit 100 driving the display panel 200 using the driving method as described in any one of the above embodiments.
It should be noted that, the limitation of each step in the present solution is not to be considered as limiting the sequence of steps on the premise of not affecting the implementation of the specific solution, that is, the steps written in the previous step may be executed before, may be executed after, or may even be executed simultaneously, and as long as the implementation of the present solution is possible, all the steps should be considered as falling within the protection scope of the present application. The inventive concept of the present application can form a very large number of embodiments, but the application documents are limited in size and cannot be listed one by one, so that on the premise of no conflict, the above-described embodiments or technical features can be arbitrarily combined to form new embodiments, and after the embodiments or technical features are combined, the original technical effects can be enhanced.
The above description of the application in connection with specific alternative embodiments is further detailed and it is not intended that the application be limited to the specific embodiments disclosed. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the application, and these should be considered to be within the scope of the application.