CN108154854B - Panel display device and data reverse compensation method thereof - Google Patents
Panel display device and data reverse compensation method thereof Download PDFInfo
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- CN108154854B CN108154854B CN201711426354.2A CN201711426354A CN108154854B CN 108154854 B CN108154854 B CN 108154854B CN 201711426354 A CN201711426354 A CN 201711426354A CN 108154854 B CN108154854 B CN 108154854B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3685—Details of drivers for data electrodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3614—Control of polarity reversal in general
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Abstract
The invention provides a panel display device and a data reverse compensation method thereof, wherein the panel display device comprises a display panel, a TFT switch arranged in the display panel, a source electrode driver, a time sequence control chip, a compensation voltage chip and a gamma chip, wherein the compensation voltage chip and the gamma chip jointly output periodic data voltage to charge a pixel electrode, the periodic data voltage has periodic charging time, and the periodic charging time comprises pixel electrode charging time and compensation time; inputting a data voltage to the pixel electrode during a charging time of the pixel electrode; in the compensation time, the TFT switch is in a closed state, and a compensation level is input to the data line; the data voltage and the compensation level have opposite polarities. The invention can eliminate most of abnormal picture phenomena caused by the coupling of data voltage to peripheral devices.
Description
Technical Field
The invention belongs to the technical field of liquid crystal display panels, and particularly relates to a panel display device and a data reverse compensation method thereof.
Technical Field
In the liquid crystal display panel, the brightness of the pixel unit is determined by the voltage difference between two ends of the liquid crystal. One end of the liquid crystal is a common voltage, and the same common voltage is generally used for the entire panel, and the other end of the liquid crystal is a data voltage (data voltage, i.e., voltage of a pixel electrode), and when a Thin Film Transistor (TFT) is turned on, the voltage is charged by a data line. The pixel unit mainly depends on the liquid crystal capacitor and the storage capacitor to keep the voltage difference when the thin film transistor is turned off (the two capacitors are usually connected in parallel).
In addition to the above two capacitors, as shown in fig. 1, in the pixel unit of the tft, parasitic capacitors exist among the data line (Source), the scan line (Gate), and the common voltage line (Com), such as the liquid crystal capacitor Clc of the liquid crystal itself, the storage capacitor (Cst) generated by the common voltage line (Com) itself, the parasitic capacitor (Cgd) between the scan line and the pixel electrode, and the parasitic capacitor (Csc) between the data line and the common voltage line.
The data voltage may couple to these capacitors. When the coupling phenomenon causes a large deviation in the pixel electrode voltage or the common voltage, the display luminance also deviates.
In the prior art, the situation that the data voltage generates a coupling phenomenon to the peripheral devices is generally compensated for electrically by using the coupled devices, and the key point is to keep the electrical property of the coupled devices unchanged as much as possible so as to influence the coupling.
Disclosure of Invention
The invention aims to provide a panel display device and a data reverse compensation method thereof, which can eliminate most of abnormal picture phenomena caused by the coupling of data voltage to peripheral devices.
The invention provides a panel display device, which comprises a display panel, a TFT switch arranged in the display panel, a source driver connected with the display panel, a time sequence control chip connected with the source driver, a compensation voltage chip and a gamma chip, wherein the compensation voltage chip and the gamma chip are both connected with the time sequence control chip, the compensation voltage chip and the gamma chip jointly output periodic data voltage to charge a pixel electrode, the periodic data voltage has periodic charging time, and the periodic charging time comprises pixel electrode charging time and compensation time; inputting a data voltage to the pixel electrode during a charging time of the pixel electrode; in the compensation time, the TFT switch is in a closed state, and a compensation level is input to the data line; the data voltage and the compensation level have opposite polarities.
The invention also provides a panel display device, which comprises a display panel, a TFT switch arranged in the display panel, a source driver connected with the display panel, a time sequence control chip connected with the source driver, a compensation voltage chip and a gamma chip, wherein the compensation voltage chip and the gamma chip are both connected with the time sequence control chip; the compensation voltage chip and the gamma chip jointly output periodic data voltage to charge the pixel electrode, the periodic data voltage has periodic charging time, and the periodic charging time comprises pixel electrode charging time and compensation time; inputting a data voltage to the pixel electrode during a charging time of the pixel electrode; in the compensation time, the TFT switch is in a closed state, and a compensation level is input to the data line; the data voltage and the compensation level have opposite polarities.
The invention also provides a panel display device, which comprises a display panel, a TFT switch arranged in the display panel, a source driver connected with the display panel, a time sequence control chip connected with the source driver, a compensation voltage chip and a gamma chip, wherein the compensation voltage chip and the gamma chip are both connected with the time sequence control chip, and part or all of the compensation voltage chip is integrated in the gamma chip; the compensation voltage chip and the gamma chip jointly output periodic data voltage to charge the pixel electrode, the periodic data voltage has periodic charging time, and the periodic charging time comprises pixel electrode charging time and compensation time; inputting a data voltage to the pixel electrode during a charging time of the pixel electrode; in the compensation time, the TFT switch is in a closed state, and a compensation level is input to the data line; the data voltage and the compensation level have opposite polarities.
The invention also provides a panel display device, which comprises a display panel, a TFT switch arranged in the display panel, a source driver connected with the display panel, a time sequence control chip connected with the source driver, a compensation voltage chip and a gamma chip, wherein the compensation voltage chip and the gamma chip are both connected with the time sequence control chip, and part or all of the compensation voltage chip is integrated in the source driver; the compensation voltage chip and the gamma chip jointly output periodic data voltage to charge the pixel electrode, the periodic data voltage has periodic charging time, and the periodic charging time comprises pixel electrode charging time and compensation time; inputting a data voltage to the pixel electrode during a charging time of the pixel electrode; in the compensation time, the TFT switch is in a closed state, and a compensation level is input to the data line; the data voltage and the compensation level have opposite polarities.
The present invention further provides a data reverse compensation method of a panel display device, the method comprising: the time sequence control chip sends control signals for driving the source driver to the compensation voltage chip and the gamma chip, the control signals output periodic data voltage to charge the pixel electrode, the periodic data voltage has periodic charging time, and the periodic charging time comprises pixel electrode charging time and compensation time; in each compensation time, the TFT switch is in a closed state, and the pixel electrode is not charged; during the compensation time, the compensation level on the data line compensates the coupling effect generated by the data voltage during the previous period of the pixel electrode charging time.
Preferably, the method specifically comprises the following steps:
step S1: the time sequence control chip suspends the clock signal within the normal display time, so that the process of sequentially opening the TFT switches on the scanning lines in the gate driver or the gate driving circuit is suspended;
step S2: the compensation voltage chip calculates the compensation level on the data line in the compensation time according to the condition of the data voltage on the data line in the pixel charging time;
step S3: the compensation voltage chip and the gamma chip output periodic data voltage to charge the pixel electrode, wherein the periodic data voltage has periodic charging time, and the periodic charging time comprises pixel electrode charging time and compensation time; inputting a data voltage to the pixel electrode during a charging time of the pixel electrode; in the compensation time, the TFT switch is in a closed state, and a compensation level is input to the data line; the data voltage and the compensation level have opposite polarities.
Preferably, the compensation time is set by a compensation voltage chip of the timing control chip.
According to the invention, compensation time is inserted in the pixel charging time, and corresponding compensation voltage is determined according to the data voltage change in the pixel charging time; according to the voltage difference of the voltage transmitted by the data line relative to a reference potential, compensation voltages with opposite voltage difference directions are periodically input, so that the coupling of the data voltage to peripheral devices within a certain time range is counteracted, and the data voltage can always maintain the same coupling amount (which can be 0) within a period; the invention can eliminate most of abnormal picture phenomena caused by the coupling of data voltage to peripheral devices.
Drawings
FIG. 1 is a schematic diagram of a pixel unit of a conventional LCD panel;
FIG. 2 is a schematic view of a panel display device according to the present invention;
FIG. 3 is a schematic diagram showing a change of a data line in two frames of a conventional panel display device;
FIG. 4 is a schematic diagram showing a change of a data line in two frames of the panel display device according to the present invention;
FIG. 5 is a schematic diagram of a panel display device according to the present invention.
Detailed Description
Fig. 2 is a schematic structural diagram of a display panel device according to the present invention, the display panel device includes a display panel 100, data lines (not shown) and scan lines (not shown) disposed on the display panel 100 and crisscrossed, a pixel unit defined by intersections of the data lines and the scan lines, a pixel electrode disposed in the pixel unit, a TFT switch disposed at an intersection of the data lines and the scan lines, a source driver 10 connected to the data lines, a gate driver or gate driving circuit 20 (shown in fig. 5) connected to the scan lines, and a timing control chip (Tcon IC)30 (shown in fig. 5), wherein the timing control chip (Tcon IC)30 is connected to the source driver 10 and the gate driver or gate driving circuit 20. The grid electrode of the TFT switch is connected with the scanning line, the source electrode of the TFT switch is connected with the data line, and the drain electrode of the TFT switch is connected with the pixel electrode.
When the gate driver 20 is disposed outside the display panel 100, it is a gate driver; when the gate driving circuit 20 is disposed in the display panel 100, it is the gate driving circuit 20.
In this embodiment, the change of one data line in two frames is described by taking the case where the positive and negative polarities of the Gamma voltage are changed once per frame for the data line, and the white picture is lighted.
Two pixel electrodes a and B corresponding to a certain data line 1 are selected, as shown in fig. 3, from a period from one time of turning on the TFT switch and simultaneously charging the data voltage Vs of the data line to the pixel electrode a to turning off the TFT switch to the next time of turning on the data voltage charged to the data line to the pixel electrode B and then turning off. As seen from FIG. 3, the pixel electrode A on the data line 1 has a Gamma positive voltage during most of the period A-A, the Gamma positive voltage period is + T, the pixel electrode B has a Gamma negative voltage during most of the period B-B, and the Gamma negative voltage period is-T.
In a period + T of the pixel electrode a using a Gamma positive voltage, the data line 1 charges the pixel electrode a for T1 and the idle time is T'; in a period-T of the pixel electrode B using a Gamma negative voltage, the data line 1 charges the pixel electrode A for T1, and the idle time is T'; here, the period of the data voltage Vs is T in each pixel electrode, and T is T1+ T'.
Herein, the idle time (also called blank time), i.e. blank time in general, is divided into horizontal idle time (i.e. H-blank) and vertical idle time (i.e. V-blank), and the idle time mentioned in the present invention is actually vertical idle time.
Vertical idle time: in the process, from the first line to the last line, after the scanning lines of each line on the panel are opened, the TFT switches of the whole line are turned on in sequence, the pixel electrodes receive signals of the data lines and then the TFT switches are turned off, the next line is opened, received and then turned on, the TFT switches of the whole line are turned on in the scanning lines of the last line, then the TFT switches are turned off after the signals of the data lines are received, the first line is not immediately opened to receive data of the first line of the next frame, the first line is equal to a period of time, and the period of time between the turning off of the TFT switches of the last line of the previous frame and the turning on of the TFT switches of the first line of the next frame is the vertical idle time.
During this time, some processes similar to handshaking signals can be performed between the timing control chip and the front-end input signal and between the source driver and the timing control chip, and meanwhile, no TFT is turned on the timing panel, and the data line normally supplies a black voltage.
The data voltages charged to the pixel electrodes a and B for the first time are the same and are both Vs, and the coupling influence of the data line 1 on the data voltages after the voltages are charged is obviously different, so that the abnormal picture phenomenon may occur.
For the abnormal phenomenon of the panel picture generated in fig. 3, as shown in fig. 4, the idle time T' is divided into n parts and inserted into the original pixel charging time period as the compensation time, that is: the data voltage Vs is applied to each pixel electrode for periodic charging using a Gamma period T, each periodic charging time is T, each time period T includes a pixel electrode charging time T1 and a compensation time T2, i.e., T nt ═ n (T1+ T2), n is a natural number, and T1 ═ n ═ T1, T' ═ n T2, and T2 is generally smaller than T1.
Wherein, in each pixel electrode charging time t1, the TFT switch is in an open state, and the pixel electrode is normally charged; during each compensation time t2, the TFT switch is in the off state and the pixel electrode is not charged. During the compensation time t2, the compensation level on the data line compensates for the coupling effect generated by the data line during the previous charging time of the pixel electrode (i.e. after the previous compensation time is over and before the compensation time is over).
Namely: inputting a data voltage Vs to the pixel electrode during a pixel electrode charging time t 1; in the compensation time, the TFT switch is in a closed state, and a compensation level is input to the data line; the polarities of the data voltage Vs and the compensation level are opposite with respect to the central reference voltage of the positive and negative gammas.
Therefore, the effect difference of the pixel electrodes A and B coupled by the data lines in the time periods A-A and B-B respectively is greatly reduced, and the effect difference of the pixel electrode B coupled by the data lines in the time period B-B per se is also greatly reduced.
The last compensation time of each frame can be used as the original idle time, and if the time length is not enough, the time length of the last compensation time can be increased.
For the compensation time t2 shown in fig. 4, a new function needs to be added on the basis of the existing timing control chip (Tcon IC)30, and the Source driver 10(Source IC) is required to support the corresponding function.
In the present embodiment, the display panel device further includes a Compensation voltage chip (Compensation Block)31 connected to the timing control chip (Tcon IC)30 as the start-up Compensation time T2, and a Gamma chip (Gamma IC)32 controlling a voltage for each pixel electrode using a Gamma period T, the Gamma chip (Gamma IC)32 is also connected to the timing control chip (Tcon IC)30, and the Compensation voltage chip (Compensation Block)31 and the Gamma chip (Gamma IC)32 each output a signal to the Source driver 10(Source IC).
The working principle of the time sequence control chip is as follows:
the timing control chip (Tcon IC)30 needs to be able to suspend the clock signal (GCK) during the normal display time (i.e., the pixel electrode charging time t1) to suspend the process of sequentially turning on the TFT switches on the scan lines in the Gate driver or Gate driving circuit 20(Gate IC or GDM circuit).
The Compensation voltage chip (Compensation Block)31 and the gamma chip (gamma IC)32 collectively output a periodic data voltage having a periodic charging time including a pixel electrode charging time t1 and a Compensation time t2 to charge the pixel electrode; inputting a data voltage Vs to the pixel electrode during a charging time t1 of the pixel electrode; during the compensation time t2, the TFT switch is in a closed state, and the compensation level is input to the data line; the data voltage Vs and the compensation level have opposite polarities.
The Compensation voltage chip (Compensation Block)31 and the gamma chip (gamma IC)32 need to calculate the Compensation level on the data line in the current Compensation time according to the data voltage Vs on the data line in the current pixel charging time (the data output by the timing control chip in the current stage is available).
For the case of a specific output of the compensation level, two ways may be used, either separately or in combination:
the first mode is as follows: at the compensation time t2, the timing control chip (Tcon IC)30 directly sends out a signal to make the Source driver (Source IC)10 change the output to a mode with the polarity opposite to that of the current data line output data voltage, and change the level of the compensation level by changing the output gray-scale signal.
The second mode is as follows: since the Compensation time t2 is much shorter than the pixel charging time t1, the required Compensation voltage may exceed the normal gamma voltage, and the normal gamma chip (gamma IC)32 cannot provide the corresponding voltage, a special Compensation voltage chip (Compensation Block)31 may be used to set the Compensation time t2, and the Compensation voltage chip (Compensation Block)31 is disposed in the timing control chip (Tcon IC) 30.
The invention also provides a data reverse compensation method of a panel display device, wherein a time sequence control chip (Tcon IC)30 sends out a control signal for driving a source driver, the control signal drives a data voltage Vs to charge a pixel electrode periodically, and the periodic charging time comprises pixel electrode charging time t1 and compensation time t 2; during each pixel electrode charging time t1, the TFT switch is in an open state, and the pixel electrode is charged; during each compensation time t2, the TFT switch is in the off state and the pixel electrode is not charged; during the compensation time t2, the compensation level on the data line compensates for the coupling effect generated by the data line during the previous charging time of the pixel electrode (i.e. after the previous compensation time is over and before the compensation time is over).
The method specifically comprises the following steps:
step S1: the timing control chip (Tcon IC)30 suspends the clock signal (GCK) during the normal display time (i.e., the pixel electrode charging time t1) to suspend the process of sequentially turning on the TFT switches on the scan lines in the Gate driver or Gate driving circuit 20(Gate IC or GDM circuit);
step S2: a Compensation Block (Compensation Block)31 calculates the Compensation level on the data line in the Compensation time according to the data voltage on the data line in the pixel charging time (the data output by the timing control chip output in the current stage can be obtained);
step S3: the compensation voltage chip and the gamma chip output a periodic data voltage Vs having a periodic charging time including a pixel electrode charging time t1 and a compensation time t2 to charge the pixel electrode; during each pixel electrode charging time t1, the TFT switch is in an open state, and the pixel electrode is charged; during each compensation time t2, the TFT switch is in the off state and the pixel electrode is not charged; during the compensation time t2, the compensation level on the data line compensates for the coupling effect generated by the data line during the previous charging time of the pixel electrode (i.e. after the previous compensation time is over and before the compensation time is over).
The present invention provides a special compensation voltage, the level of which is determined by sending a digital signal from the timing control chip (Tcon IC)30 to the compensation voltage chip 32 (similar to DAC: digital-to-analog converter), and simultaneously sending a signal from the timing control chip (Tcon IC)30 to make the Source driver (Source IC)10 use the received compensation voltage as its output.
In other embodiments, the compensation voltage chip 32 has functions of compensating voltage and time, and the compensation voltage chip 32 may be partially or entirely integrated in the timing control chip (Tcon IC)30, the Source driver (Source IC)10 and the gamma chip (gamma IC) 32.
According to the invention, compensation time is inserted in the pixel charging time, and corresponding compensation voltage is determined according to the data voltage change in the pixel charging time; according to the voltage difference of the voltage transmitted by the data line relative to a reference potential, supplementary voltage with opposite direction of the voltage difference is periodically input, so that the coupling of the data voltage to peripheral devices in a certain time range is counteracted, and the data voltage can always maintain the same coupling amount (which can be 0) in a period; the invention can eliminate most of abnormal picture phenomena caused by the coupling of data voltage to peripheral devices.
Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the details of the embodiments, and various equivalent modifications can be made within the technical spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention.
Claims (7)
1. A panel display device characterized by: the pixel electrode charging circuit comprises a display panel, a TFT switch arranged in the display panel, a source electrode driver connected with the display panel, a time sequence control chip connected with the source electrode driver, a compensation voltage chip and a gamma chip, wherein the compensation voltage chip and the gamma chip are both connected with the time sequence control chip, the compensation voltage chip and the gamma chip jointly output periodic data voltage to charge a pixel electrode, the periodic data voltage has periodic charging time, the periodic charging time comprises pixel electrode charging time and compensation time, the compensation voltage chip starts the compensation time, and the gamma chip controls the voltage of each pixel electrode in a use period; in the charging time of the pixel electrode, the TFT switch is in an open state, and a data voltage is input to the pixel electrode; in the compensation time, the TFT switch is in a closed state, a compensation level is input to the data line, and the compensation level on the data line compensates the coupling effect generated by the data line in the previous pixel electrode charging time; the data voltage and the compensation level have opposite polarities.
2. A panel display device characterized by: the display panel comprises a display panel, a TFT switch arranged in the display panel, a source electrode driver connected with the display panel, a time sequence control chip connected with the source electrode driver, a compensation voltage chip and a gamma chip, wherein the compensation voltage chip and the gamma chip are both connected with the time sequence control chip, and part or all of the compensation voltage chip is integrated in the time sequence control chip; the compensation voltage chip and the gamma chip jointly output periodic data voltage to charge the pixel electrode, the periodic data voltage has periodic charging time, the periodic charging time comprises pixel electrode charging time and compensation time, the compensation voltage chip starts the compensation time, and the gamma chip controls the voltage of each pixel electrode use period; in the charging time of the pixel electrode, the TFT switch is in an open state, and a data voltage is input to the pixel electrode; in the compensation time, the TFT switch is in a closed state, a compensation level is input to the data line, and the compensation level on the data line compensates the coupling effect generated by the data line in the previous pixel electrode charging time; the data voltage and the compensation level have opposite polarities.
3. A panel display device characterized by: the display panel comprises a display panel, a TFT switch arranged in the display panel, a source electrode driver connected with the display panel, a time sequence control chip connected with the source electrode driver, a compensation voltage chip and a gamma chip, wherein the compensation voltage chip and the gamma chip are both connected with the time sequence control chip, and part or all of the compensation voltage chip is integrated in the gamma chip; the compensation voltage chip and the gamma chip jointly output periodic data voltage to charge the pixel electrode, the periodic data voltage has periodic charging time, the periodic charging time comprises pixel electrode charging time and compensation time, the compensation voltage chip starts the compensation time, and the gamma chip controls the voltage of each pixel electrode use period; in the charging time of the pixel electrode, the TFT switch is in an open state, and a data voltage is input to the pixel electrode; in the compensation time, the TFT switch is in a closed state, a compensation level is input to the data line, and the compensation level on the data line compensates the coupling effect generated by the data line in the previous pixel electrode charging time; the data voltage and the compensation level have opposite polarities.
4. A panel display device characterized by: the display panel comprises a display panel, a TFT switch arranged in the display panel, a source driver connected with the display panel, a time sequence control chip connected with the source driver, a compensation voltage chip and a gamma chip, wherein the compensation voltage chip and the gamma chip are both connected with the time sequence control chip, and part or all of the compensation voltage chip is integrated in the source driver; the compensation voltage chip and the gamma chip jointly output periodic data voltage to charge the pixel electrode, the periodic data voltage has periodic charging time, the periodic charging time comprises pixel electrode charging time and compensation time, the compensation voltage chip starts the compensation time, and the gamma chip controls the voltage of each pixel electrode use period; in the charging time of the pixel electrode, the TFT switch is in an open state, and a data voltage is input to the pixel electrode; in the compensation time, the TFT switch is in a closed state, a compensation level is input to the data line, and the compensation level on the data line compensates the coupling effect generated by the data line in the previous pixel electrode charging time; the data voltage and the compensation level have opposite polarities.
5. The method of compensating for data inversion of a panel display device according to any one of claims 1 to 4, the method comprising: the time sequence control chip sends control signals for driving the source driver to the compensation voltage chip and the gamma chip, the control signals output periodic data voltage to charge the pixel electrode, the periodic data voltage has periodic charging time, and the periodic charging time comprises pixel electrode charging time and compensation time; in each compensation time, the TFT switch is in a closed state, and the pixel electrode is not charged; during the compensation time, the compensation level on the data line compensates the coupling effect generated by the data voltage during the previous period of the pixel electrode charging time.
6. The data inversion compensation method of a panel display device according to claim 5, wherein: the method specifically comprises the following steps:
step S1: the time sequence control chip suspends the clock signal within the normal display time, so that the process of sequentially opening the TFT switches on the scanning lines in the gate driver or the gate driving circuit is suspended;
step S2: the compensation voltage chip calculates the compensation level on the data line in the compensation time according to the condition of the data voltage on the data line in the pixel charging time;
step S3: the compensation voltage chip and the gamma chip output periodic data voltage to charge the pixel electrode, wherein the periodic data voltage has periodic charging time, and the periodic charging time comprises pixel electrode charging time and compensation time; inputting a data voltage to the pixel electrode during a charging time of the pixel electrode; in the compensation time, the TFT switch is in a closed state, and a compensation level is input to the data line; the data voltage and the compensation level have opposite polarities.
7. The data inversion compensation method of a panel display device according to claim 5, wherein: the compensation time is set by a compensation voltage chip of the time sequence control chip.
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| CN111028799A (en) * | 2019-12-10 | 2020-04-17 | Tcl华星光电技术有限公司 | Driving circuit and driving method of display panel |
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