The present application is the National Stage of International Application with No. PCT/CN2019/076181, filed Feb. 26, 2019, which claims the benefit of a Chinese patent application filed with the National Intellectual Property Administration on Jan. 30, 2019, with the application number 201910097394.X and the title “Driving method for display panel, driving device of display panel, and display apparatus”, the entire contents of which are hereby incorporated by reference.
The present application relates to the technical field of liquid crystal display, and in particular to a driving method for a display panel, a driving device of a display panel, and a display apparatus.
The statements herein merely provide background information related to the present application and do not necessarily constitute prior art.
The existed large-size liquid crystal display panels mostly use negative Vertical Alignment (VA) liquid crystals or In-Plane Switching (IPS) liquid crystals.
It has been found that VA liquid crystal technology has higher production efficiency and lower manufacturing cost, compared with IPS liquid crystal technology, but its performance in optical properties is inferior to IPS liquid crystal technology and has obvious optical property defects.
The defects happen especially when the large-sized display panels are applied. If the display panel is viewed in a relatively small viewing angle in the driving process of the VA liquid crystal, for example, in front view, the pixel brightness will linearly change along with the voltage. If the display panel is viewed in a relatively larger viewing angle, the pixel brightness will rapidly saturate along with the voltage, severely deteriorating the image quality in the viewing angle. Obviously, there is no little difference between the ideal curve and the actual curve, which makes a serious change in the gray scale that should have been presented in a larger viewing angle because of the deterioration, resulting in color shift.
To improve the color shift regarding the VA liquid crystal, a general solution is to further divide subpixels into main pixels and sub-pixels. As such, the change in pixel brightness along with the voltage at a larger viewing angle is close to that at a smaller viewing angle.
However, the manner of division of the main pixel and the sub-pixel will solve the color shift by spatially providing a difference in driving voltages to the main pixel and the sub-pixel, but may also bring about the requirement of redesigning the metal traces or Thin Film Transistor (TFT) elements to drive the sub-pixel. The transparent opening area has to be sacrificed and the panel transmittance has been further affected.
For above, it is believed that the current solution for improving the color shift may not be a perfect one because of its negative influence on panel transmittance.
The main purpose of the present application is to provide a driving method for a display panel, a driving device of a display panel, and a display apparatus, aiming at effectively improving the color shift without affecting the panel transmittance.
In order to achieve the objective aforementioned, the present application provides a driving method for a display panel, in which the display panel includes a display array which includes pixels arranged in an array, and each one of the pixels consists of three subpixels. The driving method includes:
acquiring a first preset scanning driving signal, a second preset scanning driving signal and a preset data driving signal, and shortening the driving time of the second preset scanning driving signal, to allow the driving time of the second preset scanning driving signal to be shortened compared with the driving time of the preset data driving signal;
taking having scanned two adjacent rows of subpixels as a driving period, driving the pixels in an even-numbered column of a first row and the pixels in an odd-numbered column in a second row by the first preset scanning driving signal in the driving period, and driving the pixels in an odd-numbered column of the first row and the pixels in an even-numbered column in the second row by the second preset scanning driving signal in the driving period.
In some embodiments, prior to acquiring the first preset scanning driving signal, the second preset scanning driving signal and the preset data driving signal, and shortening the driving time of the second preset scanning driving signal, to allow the driving time of the second preset scanning driving signal to be shortened compared with the driving time of the preset data driving signal, the method further includes:
setting polarity of two adjacent subpixels to be opposite.
In some embodiments, after taking having scanned two adjacent rows of subpixels as a driving period, driving the pixels in an even-numbered column of a first row and the pixels in an odd-numbered column in a second row by the first preset scanning driving signal in the driving period, and driving the pixels in an odd-numbered column of the first row and the pixels in an even-numbered column in the second row by the second preset scanning driving signal in the driving period, the method further includes:
driving the subpixels of a same column by a same data driving signal.
In some embodiments, after the same column of subpixels are driven with the same data driving signal, the method further includes:
driving the two adjacent subpixels of the same column by the preset data driving signal. The preset data driving signal is an average value of historical driving signals of the two adjacent subpixels.
In some embodiments, after acquiring a first preset scanning driving signal, a second preset scanning driving signal and a preset data driving signal, and shortening the driving time of the second preset scanning driving signal, to allow the driving time of the second preset scanning driving signal to be shortened compared to the driving time of the preset data driving signal, the method further includes:
receiving an inversion signal, reversing the first preset scanning driving signal and the preset data driving signal according to the inversion signal, obtaining the inverted first preset scanning driving signal and the inverted preset data driving signal, shortening driving time of the inverted first preset scanning driving signal, to allow the driving time of the first preset scanning driving signal to be shorten compared with the driving time of the inverted preset data driving signal.
In addition, in order to achieve the objective aforementioned, the present application provides a driving device of a display panel, in which the display panel includes a display array which includes pixels arranged in an array. Each one of the pixels consists of three subpixels. The driving device includes:
an acquiring circuit, configured to acquire a first preset scanning driving signal, a second preset scanning driving signal and a preset data driving signal, and shorten the driving time of the second preset scanning driving signal, to allow the driving time of the second preset scanning driving signal to be shortened compared with the driving time of the preset data driving signal;
a driving circuit, configured to take having scanned two adjacent rows of subpixels as a driving period, drive the pixels in an even-numbered column of a first row and the pixels in an odd-numbered column in a second row by the first preset scanning driving signal in the driving period, and drive the pixels in an odd-numbered column of the first row and the pixels in an even-numbered column in the second row by the second preset scanning driving signal in the driving period.
In addition, in order to achieve the objective aforementioned, the present application also provides a display apparatus, which includes: a display panel, a memory, a processor, and executable instructions of the display panel stored on the memory and operable on the processor. The display panel includes a display array including pixels arranged in an array, and each one of the pixels consists of three subpixels. The executable instructions of the display panel implement the operations of the driving method of the display panel as described above.
The present application acquires a first preset scanning driving signal, a second preset scanning driving signal and a preset data driving signal, shortens the driving time of the second preset scanning driving signal so as to shorten the driving time of the second preset scanning driving signal compared to the driving time of the preset data driving signal. It takes having scanned two adjacent rows of subpixels as a driving period, drives the even-numbered column pixels in the first row and odd-numbered column pixels in the second row in the driving period with a first preset scanning driving signal, and drives the odd-numbered column pixels in the first row and the even-numbered column pixels in the second row in the driving period with a second preset scanning driving signal. The present application creates a difference in the driving time of the two scanning driving signals, so as to enable a difference in charging capability of the sub-pixels on the two scanning driving signals. Thus driving of high voltage pixels and low voltage pixels with alternative arrangement in the display array can be realized, thereby alleviating color shift.
The implementation, functional characteristics and advantages of the present application will be further described with reference to the attached drawings in combination with embodiments.
It should be understood that the specific embodiments described herein are only for the purpose of explaining the present application and are not intended to limit the present application.
Referring to
As shown in
It would be understood by those skilled in the art that the structure shown in
As shown in
The display device of the present application calls an executable instruction of the display panel stored in the memory 1005 through the processor 1001 and executes a driving method of the display panel.
Based on the above hardware structure, embodiments of the driving method of the display panel of the present application are proposed.
Referring to
Referring to
Referring to
In some embodiment, the driving method of the display panel includes:
Step S10, acquiring a first preset scanning driving signal, a second preset scanning driving signal and a preset data driving signal, and shortening the driving time of the second preset scanning driving signal, to allow the driving time of the second preset scanning driving signal to be shortened compared with the driving time of the preset data driving signal; and
It should be noted that as shown in
Step S20, taking having scanned two adjacent rows of subpixels as a driving period, driving the pixels in an even-numbered column of a first row and the pixels in an odd-numbered column in a second row by the first preset scanning driving signal in the driving period, and driving the pixels in an odd-numbered column of the first row and the pixels in an even-numbered column in the second row by the second preset scanning driving signal in the driving period.
It should be noted that the voltage intensity of sub-pixels can be divided into low voltage (such as subpixels marked with L in
It is understood that, the displayed gray scale associated with the subpixels with a high voltage is relatively bright, while displayed gray scale associated with the subpixels with a low voltage is relatively dark. As illustrated in
As shown in
It can be understood that, the time for the scanning driving signal Vg2 is controlled shorter than that of the data driving signal. Compared with the time for the scanning switch timing of Vg1 which is longer, the charging capability can be deteriorated of the subpixel associated with the VG2 scanning driving line. And the charging capability of the subpixel associated with the Vg1 scanning line can be strengthened, thereby achieving the difference between the charging of the high voltage subpixel and the charging of the low voltage subpixel, and further improving the color shift.
In some embodiments, two scanning driving signals are used to drive pixels in two adjacent rows in an alternative manner, and the preset scanning driving signals in the scanning driving signals are driven by a target driving time relative to the preset data driving signals, so that the driving times of the two scanning driving signals have the difference. Thus the charging capabilities of subpixels on the two rows of scanning driving signals are different, implementing the alternative driving with high voltage and low voltage for pixels adjacent in a display array, and thereby alleviating color shift.
Optionally, before the step S10, the method further includes:
setting polarity of two adjacent subpixels to be opposite. And after Step S20, the method further includes:
driving the subpixels of a same column by a same data driving signal.
It can be understood that, as shown in
Optionally, after the same column of subpixels are driven with the same data driving signal, the method further includes:
driving the two adjacent subpixels of the same column by the preset data driving signal. The preset data driving signal is an average value of historical driving signals of the two adjacent subpixels.
It should be noted that the historical driving signals of the two adjacent subpixels of the same column are the driving signals of the two adjacent subpixels to the same column before improvement. The equivalent driving voltages VGd_1 and VGd_2 of the two adjacent subpixels of the same column are respectively driven by the positive driving voltage Vgd=VG1 and the negative driving voltage Vgd=VG1′. And the positive driving voltage VG1 and negative driving voltage VG1′ can be selected as the average signals of the original display array pixel signals Gd1 and Gd2, which is 0-255 signals in terms of 8 bit driving signals, namely G1=(Gd1+Gd2)/2, corresponding to the positive driving voltage VG1 and negative driving voltage VG1′. The equivalent voltages of VGd_3 and VGd_4 are respectively driven by the positive driving voltage Vgd=VG2 and the negative driving voltage Vgd=VG2′, and can be selected as the average signals of the pixel signals Gd3 and Gd4 in the original frame (0-255 signals in terms of 8-bit driving signals), namely G2=(Gd3+Gd4)/2, which is corresponding to the positive driving voltage VG2 and the negative driving voltage VG2′.
Optionally, after the step S10, the method further includes:
receiving an inversion signal, reversing the first preset scanning driving signal and the preset data driving signal according to the inversion signal, obtaining the inverted first preset scanning driving signal and the inverted preset data driving signal, shortening driving time of the inverted first preset scanning driving signal, to allow the driving time of the first preset scanning driving signal to be shorten compared with the driving time of the inverted preset data driving signal.
Referring to the timing sequence shown in
In some embodiments, the inversion of the driving signals of the adjacent two frames in the display array is shown in
Optionally, the pixel includes a first pixel and a second pixel which are alternately arranged in a column direction, in which the first pixel is sequentially a red subpixel, a green subpixel, a blue subpixel and a white subpixel, and the second pixel comprises sequentially arranged a blue subpixel, a white subpixel, a red subpixel and a green subpixel.
Optionally, the step S20 includes:
taking having scanned two adjacent rows of subpixels as a driving period, driving the pixels in an even-numbered column of a first row and the pixels in an odd-numbered column in a second row by the second preset scanning driving signal in the driving period, and driving the pixels in an odd-numbered column of the first row and the pixels in an even-numbered column in the second row by the first preset scanning driving signal in the driving period, and driving the subpixels with dot inversion.
As shown in
In addition, the embodiments of the present application also provide a driving device of the display panel. As shown in
an acquiring circuit 110, configured to acquire a first preset scanning driving signal, a second preset scanning driving signal and a preset data driving signal, and shorten the driving time of the second preset scanning driving signal, to allow the driving time of the second preset scanning driving signal to be shortened compared with the driving time of the preset data driving signal; and
a driving circuit 120, configured to take having scanned two adjacent rows of subpixels as a driving period, drive the pixels in an even-numbered column of a first row and the pixels in an odd-numbered column in a second row by the first preset scanning driving signal in the driving period, and drive the pixels in an odd-numbered column of the first row and the pixels in an even-numbered column in the second row by the second preset scanning driving signal in the driving period.
Optionally, the polarity of two adjacent subpixels are set to be opposite.
Optionally, the driving circuit is configured to drive the subpixels of a same column by a same data driving signal.
Optionally, the driving circuit is further configured to drive the two adjacent subpixels of the same column by the preset data driving signal. The preset data driving signal is an average value of historical driving signals of the two adjacent subpixels.
Optionally, the acquiring circuit is further configured to receive an inversion signal, reverse the first preset scanning driving signal and the preset data driving signal according to the inversion signal, obtain the inverted first preset scanning driving signal and the inverted preset data driving signal, shorten driving time of the inverted first preset scanning driving signal, to allow the driving time of the first preset scanning driving signal to be shorten compared with the driving time of the inverted preset data driving signal.
Optionally, the pixel comprises a first pixel and a second pixel which are alternately arranged in a column direction, wherein the first pixel is sequentially a red subpixel, a green subpixel, a blue subpixel and a white subpixel, and the second pixel comprises sequentially arranged a blue subpixel, a white subpixel, a red subpixel and a green subpixel.
The driving circuit is further configured to take having scanned two adjacent rows of subpixels as a driving period, drive the pixels in an even-numbered column of a first row and the pixels in an odd-numbered column in a second row by the second preset scanning driving signal in the driving period, and drive the pixels in an odd-numbered column of the first row and the pixels in an even-numbered column in the second row by the first preset scanning driving signal in the driving period, and drive the subpixels with dot inversion.
Optionally, the driving circuit 200 of the driving device of the display panel may include a scanning unit and a driving unit, in which the scanning unit is configured to output the scanning driving signals, to generally scan pixels line by line, and the driving unit is configured to output the data driving signals, so that the pixels receive driving data for displaying when being scanned.
The specific embodiment of the driving device of this embodiment can refer to the above-mentioned embodiment of the driving method of the display panel, and this embodiment will not be described here.
The description aforementioned is only the preferred embodiment of the present application and is not intended to limit the scope of the present application. Any equivalent structural modification made by using the description and drawings of the present application or direct/indirect application in other related technical fields under the concept of the present application shall be included in the protection scope of the present application.
Number | Date | Country | Kind |
---|---|---|---|
201910097394.X | Jan 2019 | CN | national |
Filing Document | Filing Date | Country | Kind |
---|---|---|---|
PCT/CN2019/076181 | 2/26/2019 | WO |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO2020/155259 | 8/6/2020 | WO | A |
Number | Name | Date | Kind |
---|---|---|---|
20090109357 | Liu et al. | Apr 2009 | A1 |
20120287100 | Woo | Nov 2012 | A1 |
20150221265 | Huang | Aug 2015 | A1 |
20160035265 | Park | Feb 2016 | A1 |
20210201729 | Huang | Jul 2021 | A1 |
20210366428 | He | Nov 2021 | A1 |
Number | Date | Country |
---|---|---|
1866350 | Nov 2006 | CN |
103728746 | Apr 2014 | CN |
105931591 | Sep 2016 | CN |
107045858 | Aug 2017 | CN |
107507575 | Dec 2017 | CN |
107507575 | Dec 2017 | CN |
107516494 | Dec 2017 | CN |
107767832 | Mar 2018 | CN |
107833562 | Mar 2018 | CN |
107833564 | Mar 2018 | CN |
107863082 | Mar 2018 | CN |
107886923 | Apr 2018 | CN |
Entry |
---|
First Office Action in counterpart Chinese Application No. 201910097394.X, dated Nov. 26, 2019. |
Second Office Action in counterpart Chinese Application No. 201910097394.X, dated May 11, 2020. |
International Search Report in corresponding PCT Application No. PCT/CN2019/076181, dated Nov. 5, 2019. |
Written Opinion of the International Searching Authority in corresponding PCT Application No. PCT/CN2019/076181, dated Nov. 5, 2019. |
Number | Date | Country | |
---|---|---|---|
20210020130 A1 | Jan 2021 | US |