CN113393787A

CN113393787A - Display panel driving method, display panel driving device and display device

Info

Publication number: CN113393787A
Application number: CN202110554476.XA
Authority: CN
Inventors: 康志聪; 袁海江
Original assignee: HKC Co Ltd; Beihai HKC Optoelectronics Technology Co Ltd
Current assignee: HKC Co Ltd; Beihai HKC Optoelectronics Technology Co Ltd
Priority date: 2021-05-20
Filing date: 2021-05-20
Publication date: 2021-09-14

Abstract

The application discloses a driving method of a display panel, a driving device of the display panel and the display device, wherein two rows of adjacent sub-pixel groups are connected with the same data line and a scanning line respectively, each sub-pixel group comprises two sub-pixels, the two sub-pixels are connected with the same scanning line and the same data line, storage capacitors of the two sub-pixels are connected with a first common electrode line respectively, the storage capacitors of the two adjacent sub-pixels in the two rows of adjacent sub-pixel groups are connected with the same first common electrode line, the pixel capacitors of the sub-pixels are connected with a common electrode at the opposite side of a pixel electrode, the polarity switching of data voltage on each data line is controlled when frame pixel driving is switched, and the polarity switching of signals on each first common electrode line is controlled by taking four frame pixel driving as a driving period, and the scanning lines and the common electrode lines are reduced by half basically through the common scanning lines and the first common electrode lines, the effective aperture opening ratio of the display panel is increased, and the penetration rate is improved.

Description

Display panel driving method, display panel driving device and display device

Technical Field

The present disclosure relates to the field of display panel technologies, and in particular, to a driving method of a display panel, a driving device of a display panel, and a display device.

Background

At present, a large-sized display panel needs a large viewing angle, and during a pixel driving process, the large viewing angle brightness is rapidly saturated with voltage, so that the viewing angle image quality contrast and the color cast are seriously deteriorated compared with the front-view image quality. The common way to solve the color shift of the viewing angle is to divide each sub-pixel of the display panel into a main pixel and a sub-pixel, and to apply different driving voltages to the main pixel and the sub-pixel, such a design usually needs to design a metal trace or a TFT element to drive the sub-pixel, which results in the sacrifice of the light-permeable opening area, the influence on the panel transmittance, and the direct increase of the backlight cost.

Disclosure of Invention

The present disclosure provides a driving method of a display panel, a driving device of a display panel, and a display device, and aims to solve the problem of a decrease in aperture ratio and penetration during driving a large-sized display panel.

To achieve the above object, the present application proposes a driving method of a display panel, the display panel:

the pixel array comprises a plurality of pixel groups, each pixel group comprises two rows of adjacent sub-pixel groups, the two rows of adjacent sub-pixel groups are connected with the same data line and respectively connected with one scanning line, each sub-pixel group comprises two sub-pixels, the two sub-pixels of each sub-pixel group are connected with the same scanning line and respectively connected with the same data line, the storage capacitors of the two sub-pixels are respectively connected with one first common electrode line, the storage capacitors of the two adjacent sub-pixels in the two rows of adjacent sub-pixel groups are connected with the same first common electrode line, the pixel capacitors of the sub-pixels are connected with the opposite sides of the pixel electrodes, wherein the voltage polarities of the two adjacent first common electrode lines are opposite, and the voltage polarities of the two adjacent data lines are opposite;

the driving method of the display panel includes the steps of:

controlling the polarity switching of the data voltage on each data line when the frame pixel drive is switched;

and controlling common electrode signals on the first common electrode lines to perform polarity switching by taking four-frame pixel driving as a driving period, wherein the polarity switching direction of the common electrode signals on the same first common electrode line from the charging-before-charging to the charging-completed polarity switching direction is sequentially from the first polarity to the second polarity, from the second polarity to the first polarity, and from the first polarity to the second polarity.

In one embodiment, the step of controlling the common electrode signals on the first common electrode lines to perform polarity switching with four frames of pixel driving as one driving cycle, and the step of sequentially switching the common electrode signals on the same first common electrode line from the polarity switching direction of charging before charging to the polarity switching direction of charging after charging to the first polarity, the second polarity to the first polarity, and the first polarity to the second polarity comprises:

two rows of sub-pixels in the same group are respectively an n _1 row of sub-pixels and an n _2 row of sub-pixels;

when the data voltage of the sub-pixels of the n _1 th row and the sub-pixels of the n _2 th row are controlled to be positive during the driving of the pixels of the first frame of the driving period, the common electrode signals of the sub-pixels of the n _1 th row are controlled to be switched from the first polarity before charging to the second polarity after charging, and the common electrode signals of the sub-pixels of the n _2 th row are controlled to be switched from the second polarity before charging to the first polarity after charging;

when the data voltage of the sub-pixels of the n _1 th row and the sub-pixels of the n _2 th row are controlled to be negative during the second frame pixel driving of the driving period, the common electrode signals of the sub-pixels of the n _1 th row are controlled to be switched from the second polarity before charging to the first polarity after charging, and the common electrode signals of the sub-pixels of the n _2 th row are controlled to be switched from the first polarity before charging to the second polarity after charging;

when the data voltages of the sub-pixels of the n _1 th row and the sub-pixels of the n _2 th row are controlled to be positive during the third frame pixel driving of the driving period, the common electrode signals of the sub-pixels of the n _1 th row are controlled to be switched from the second polarity before charging to the first polarity after charging, and the common electrode signals of the sub-pixels of the n _2 th row are controlled to be switched from the first polarity before charging to the second polarity after charging;

when the data voltage of the sub-pixels of the n _1 th row and the sub-pixels of the n _2 th row are controlled to be negative during the fourth frame pixel driving of the driving period, the common electrode signals of the sub-pixels of the n _1 th row are controlled to be switched from the first polarity before charging to the second polarity after charging, and the common electrode signals of the sub-pixels of the n _2 th row are controlled to be switched from the second polarity before charging to the first polarity after charging.

when the data voltage of the sub-pixels of the n _1 th row and the sub-pixels of the n _2 th row are controlled to be negative during the driving of the pixels of the first frame of the driving period, the common electrode signals of the sub-pixels of the n _1 th row are controlled to be switched from the first polarity before charging to the second polarity after charging, and the common electrode signals of the sub-pixels of the n _2 th row are controlled to be switched from the second polarity before charging to the first polarity after charging;

when the data voltage of the sub-pixels of the n _1 th row and the sub-pixels of the n _2 th row are controlled to be positive during the second frame pixel driving of the driving period, the common electrode signals of the sub-pixels of the n _1 th row are controlled to be switched from the second polarity before charging to the first polarity after charging, and the common electrode signals of the sub-pixels of the n _2 th row are controlled to be switched from the first polarity before charging to the second polarity after charging;

when the data voltage of the sub-pixels of the n _1 th row and the sub-pixels of the n _2 th row are controlled to be negative during the third frame pixel driving of the driving period, the common electrode signals of the sub-pixels of the n _1 th row are controlled to be switched from the second polarity before charging to the first polarity after charging, and the common electrode signals of the sub-pixels of the n _2 th row are controlled to be switched from the first polarity before charging to the second polarity after charging;

when the data voltages of the sub-pixels of the n _1 th row and the sub-pixels of the n _2 th row are controlled to be positive during the fourth frame pixel driving of the driving period, the common electrode signals of the sub-pixels of the n _1 th row are controlled to be switched from the first polarity before charging to the second polarity after charging, and the common electrode signals of the sub-pixels of the n _2 th row are controlled to be switched from the second polarity before charging to the first polarity after charging.

The present application also provides a driving method of a display panel, the display panel including:

the pixel array comprises a plurality of pixel groups, each pixel group comprises two rows of adjacent sub-pixel groups, the two rows of adjacent sub-pixel groups are connected with the same data line and respectively connected with a scanning line, each sub-pixel group comprises two sub-pixels, the two sub-pixels of each sub-pixel group are connected with the same scanning line and the same data line, the storage capacitors of the two sub-pixels are respectively connected with a first common electrode wire, the storage capacitors of the two adjacent sub-pixels in the two rows of adjacent sub-pixel groups are connected with the same first common electrode wire, and the pixel capacitors of the sub-pixels are connected with the opposite sides of the pixel electrode; the polarities of the voltages on the two adjacent first common electrode lines are opposite, and the polarities of the voltages on the two adjacent data lines are opposite;

the driving method of the display panel includes the steps of:

and controlling polarity switching of the common electrode signals on the first common electrode lines, wherein the polarity switching directions of the common electrode signals on the same first common electrode line from the charging to the charging completion before the current frame and the next frame are the same.

In one embodiment, the step of controlling polarity switching of the common electrode signals on the first common electrode lines, and the polarity switching directions of the common electrode signals on the same first common electrode line from the pre-charging to the charging completion in the current frame and the next frame are the same includes:

when the current frame pixel is driven, when the data voltage of the sub-pixels in the n _1 th row and the sub-pixels in the n _2 th row are controlled to be positive, the common electrode signals of the sub-pixels in the n _1 th row are controlled to be switched from the first polarity before charging to the second polarity after charging, and the common electrode signals of the sub-pixels in the n _2 th row are controlled to be switched from the second polarity before charging to the first polarity after charging;

when the data voltage of the sub-pixels of the n _1 th row and the sub-pixels of the n _2 th row are controlled to be negative during the driving of the pixels of the next frame, the common electrode signals of the sub-pixels of the n _1 th row are controlled to be switched from the first polarity before charging to the second polarity after charging, and the common electrode signals of the sub-pixels of the n _2 th row are controlled to be switched from the second polarity before charging to the first polarity after charging.

when the current frame pixel is driven, when the data voltage of the sub-pixels on the n _1 th row and the sub-pixels on the n _2 th row are controlled to be negative, the common electrode signals of the sub-pixels on the n _1 th row are controlled to be switched from the first polarity before charging to the second polarity after charging, and the common electrode signals of the sub-pixels on the n _2 th row are controlled to be switched from the second polarity before charging to the first polarity after charging;

when the data voltage of the sub-pixels of the n _1 th row and the sub-pixels of the n _2 th row are controlled to be positive during the driving of the pixels of the next frame, the common electrode signals of the sub-pixels of the n _1 th row are controlled to be switched from the first polarity before charging to the second polarity after charging, and the common electrode signals of the sub-pixels of the n _2 th row are controlled to be switched from the second polarity before charging to the first polarity after charging.

To achieve the above object, the present application also proposes a driving apparatus of a display panel, the display panel including:

the pixel array comprises a plurality of pixel groups, each pixel group comprises two rows of adjacent sub-pixel groups, the two rows of adjacent sub-pixel groups are connected with the same data line and respectively connected with a scanning line, each sub-pixel group comprises two sub-pixels, the two sub-pixels of each sub-pixel group are connected with the same scanning line and the same data line, the storage capacitors of the two sub-pixels are respectively connected with a first common electrode wire, the storage capacitors of the two adjacent sub-pixels in the two rows of adjacent sub-pixel groups are connected with the same first common electrode wire, and the pixel capacitors of the sub-pixels are connected with the opposite sides of the pixel electrode; the polarities of the voltages on the two adjacent first common electrode lines are opposite, and the polarities of the voltages on the two adjacent data lines are opposite; the driving device of the display panel includes:

a source driving circuit, a plurality of output ends of which are connected with the data lines, the source driving circuit being configured to output data voltages with switched positive and negative polarities to the data lines when the frame pixel driving is switched;

a common electrode voltage circuit, an output terminal of which is respectively connected to the first common electrode lines and the pixel electrode opposite side common electrodes, the common electrode voltage circuit being configured to output a common electrode signal with switched polarity to the first common electrode lines and configured to provide a reference voltage signal to the second common electrode lines;

the common electrode signals on the same first common electrode line are subjected to polarity switching by taking four-frame pixel driving as a driving period, and the polarity switching direction of the four-frame pixel driving from the pre-charging to the charging is sequentially from the first polarity to the second polarity, from the second polarity to the first polarity and from the first polarity to the second polarity; or

The common electrode signals on the same first common electrode line are switched to the same polarity switching direction from charging completion to charging completion before the current frame and the next frame;

the driving device of the display panel is further provided with a processor, a memory and a driving program of the display panel, which is stored on the memory and can run on the processor, wherein the driving program of the display panel is configured to realize the steps of the driving method of the display panel.

In one embodiment, the driving apparatus of the display panel further includes a gate driving circuit connected to each of the scan lines; the gate driving circuit is configured to output row scanning signals to each scanning line row by row so as to apply corresponding data voltages to the data lines and realize charging of the sub-pixel capacitors of the corresponding row.

In one embodiment, the driving apparatus of the display panel further includes a timing controller respectively connected to the gate driving circuit and the source driving circuit; the timing controller is configured to output a timing control signal to the gate driving circuit and the source driving circuit.

To achieve the above object, the present application also proposes a display device including the display panel as described above.

In the driving method of the display panel, in each sub-pixel group in one frame, because the same column of data voltage has the same polarity and the common electrode voltage on the first common electrode has different levels, the brightness displayed by the two sub-pixels is different. In addition, during a driving period, the positive polarity and the negative polarity of the data voltage on each data line are controlled to be switched, and the voltage level of the common electrode on each first common electrode line is controlled to be switched in a driving period of four frames, so that the display brightness of two sub-pixels in the same row in the same group is switched between brighter and darker in a unit of two frames, and the display brightness of two sub-pixels in adjacent rows in one frame is switched between brighter and darker. And the two adjacent sub-pixels in the same row can have darker and brighter changes, and for the complete row, the whole body is sequentially and alternately changed in brightness and darkness. When the whole display panel shows the brightness difference, the display panel is displayed with relatively uniform brightness, so that the problem of image quality color cast caused by visual angle deviation is solved; in addition, the number of the scanning lines and the number of the common electrode lines are reduced by half through the common scanning lines and the first common electrode lines, so that the effective aperture opening ratio of the display panel is increased, the penetration rate is improved, and the cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic diagram of an internal circuit structure of a display panel according to an embodiment of the present application;

FIG. 2 is a schematic flowchart illustrating a driving method of a display panel according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a frame driving period according to an embodiment of the present invention;

FIG. 4 is a detailed flowchart of a first embodiment of a driving method of a display panel of the present application in step S200;

FIG. 5 is a diagram illustrating a first driving timing relationship according to the embodiment shown in FIG. 4;

FIG. 6 is a diagram illustrating a second driving timing relationship according to the embodiment shown in FIG. 4;

FIG. 7 is a diagram illustrating a third driving timing relationship according to the embodiment shown in FIG. 4;

FIG. 8 is a diagram illustrating a fourth driving timing relationship according to the embodiment shown in FIG. 4;

FIG. 9 is a detailed flowchart of a second embodiment of a driving method of a display panel of the present application in step S200;

FIG. 10 is a schematic diagram illustrating a frame driving period according to another embodiment of the present invention;

FIG. 11 is a flowchart illustrating another embodiment of a driving method of a display panel according to the present application;

FIG. 12 is a flowchart illustrating a detailed process of the first embodiment of the step S400 of the driving method of the display panel according to the present application;

FIG. 13 is a diagram illustrating a first driving timing relationship according to the embodiment shown in FIG. 12;

FIG. 14 is a diagram illustrating a second driving timing relationship according to the embodiment shown in FIG. 12;

FIG. 15 is a diagram illustrating a third driving timing relationship according to the embodiment shown in FIG. 12;

FIG. 16 is a diagram illustrating a fourth driving timing relationship according to the embodiment shown in FIG. 12;

FIG. 17 is a flowchart illustrating a second embodiment of a driving method of a display panel according to the present application, step S400;

fig. 18 is a schematic structural diagram of a display panel driving apparatus according to an embodiment of the present application.

The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the description in this application referring to "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is: the method comprises three parallel schemes, wherein the scheme is taken as an A/B (A/B) as an example, the scheme comprises the scheme A, the scheme B or the scheme A and the scheme B simultaneously satisfy, in addition, the technical schemes between the various embodiments can be combined with each other, but the technical schemes must be based on the realization of the technical schemes by a person skilled in the art, and when the technical schemes are mutually contradictory or can not be realized, the combination of the technical schemes is not considered to exist, and is not in the protection scope required by the application.

The present application provides a display panel 100, as shown in fig. 1, the display panel 100 includes a plurality of pixel groups 101, each pixel group 101 includes two

adjacent sub-pixel groups

101n and 101n +1, the two

adjacent sub-pixel groups

101n and 101n +1 connect to a same data line Datam and respectively connect to a scan line Gm-n and Gm-n +1, each sub-pixel group includes two sub-pixels, two sub-pixels of each sub-pixel group are connected to the same scan line and to the same data line, storage capacitors of the two sub-pixels are respectively connected to a first common electrode line Vstm-n _1 and Vstm-n _2 or Vstm-n +1_1 and Vstm-n +1_2, storage capacitors of two adjacent sub-pixels in the adjacent sub-pixel groups are connected to a same first common electrode line Vcom, and pixel capacitors of the sub-pixels are connected to a common electrode; the polarities of the voltages on the two adjacent first common electrode lines are opposite, and the polarities of the voltages on the two adjacent data lines are opposite.

Based on the display panel 100, the present application provides a driving method of the display panel 100, as shown in fig. 2, in this embodiment, the driving method of the display panel 100 includes:

step S100, controlling the polarity switching of the data voltage on each data line when the frame pixel drive is switched;

step S200, controlling the common electrode signals on each first common electrode line to perform polarity switching with four-frame pixel driving as one driving cycle, and sequentially switching the common electrode signals on the same first common electrode line from the first polarity to the second polarity, from the second polarity to the first polarity, and from the first polarity to the second polarity in the polarity switching direction from charging before to charging after the four-frame pixel driving.

In the process of driving each frame of pixels, the timing controller 10 controls the current frame of pixels through the data lines to simultaneously drive the sub-pixels 210 of two adjacent rows in a group, and sequentially drives the sub-pixels in units of groups.

In this embodiment, as shown in fig. 1, the data signals are driven in a column inversion manner, that is, in the same frame of pixel driving, the polarity of the data signal on the same data line is kept unchanged, and the polarities of the data signals on the adjacent data lines are opposite, so that in cooperation with the driving of the common electrode signal, the sub-pixel voltages with the same polarity and different heights of the adjacent sub-pixels 210 are finally formed, so as to realize relatively uniform brightness change of one column of sub-pixels 210.

In order to realize uniform brightness change between different frames, in the pixel driving periods of different frames, the polarities of the data signals on the same data line and the polarity of the common electrode signals on the first common electrode line change along with different preset rules.

It is to be understood that the polarity control of the sub-pixel 210 as referred to herein means the positive polarity driving or negative polarity driving control of the sub-pixel 210. The positive driving of the sub-pixel 210 means that the voltage value of the driving voltage signal loaded on the data line is greater than the voltage value of the reference voltage signal Vcom on the common electrode line opposite to the pixel electrode; the negative polarity driving means that the voltage value of the driving voltage signal loaded on the data line is smaller than the voltage value of the reference voltage signal Vcom on the common electrode on the opposite side of the pixel electrode. The polarity of the sub-pixel 210 is determined by the voltage difference between the data signal voltage and the common voltage, and when the voltage difference is greater than 0, the polarity is positive, which is usually indicated by a "+" sign; when the voltage difference is less than 0, the polarity is negative, generally indicated by a "-" sign. Therefore, the opposite polarities of the data driving voltage signals of any two adjacent groups in this embodiment can be understood as follows: when the polarity of the data driving voltage signal of one group is positive, the polarity of the data driving voltage signal of the other group is negative.

In this embodiment, in the column inversion driving manner, the sub-pixels 210 on two adjacent first common electrode lines are driven at high and low levels, and finally, the sub-pixel voltages with the same polarity and different levels of the adjacent sub-pixels 210 are formed, so that the luminance displayed by the two sub-pixels 210 in the same column in the same group is changed in brightness. In the column inversion driving method, the polarities of the driving signals of the data lines in adjacent columns are inverted so that the polarities of the sub-pixels 210 in any two adjacent columns are opposite, so that in the same group, two of the sub-pixels in two adjacent columns have high display luminance and the display luminance in the other column is dark, that is, the adjacent sub-pixels 210 also change in luminance in the same row. When the whole display panel 100 shows such brightness variation, the display panel 100 is displayed with relatively uniform brightness, so that the problem of image quality color cast caused by viewing angle deviation is solved; in addition, the number of the scanning lines and the number of the first common electrode lines are reduced by half through the common scanning lines and the first common electrode lines, so that the effective aperture opening ratio of the display panel 100 is increased, the penetration rate is improved, and the cost is reduced.

When the current frame pixel driving is realized, the switching to the next frame pixel driving is performed, in this embodiment, the polarity of the data signal is changed following the frame pixel driving change, for example, the data signal is positive polarity driving in the current frame pixel driving, the data signal is negative polarity driving in the next frame pixel driving, and vice versa, meanwhile, the polarity of the common electrode signal is switched in different switching directions within four frame driving periods, the switching period of the common electrode high-low level is high-low level for each frame, that is, the polarity switching direction is sequentially first polarity to second polarity, second polarity to first polarity and first polarity to second polarity after the sub-pixel charging is completed, the first polarity and the second polarity are opposite polarities, and when the first polarity is low level, the second polarity is high level, therefore, when the pixel driving period is switched, the high and low levels of the same sub-pixel 210 are also switched in different frame driving, so that the same sub-pixel 210 does not maintain the high level or the low level, thereby avoiding the problem that the resolution is reduced because the high level or the low level signal is maintained at the position of the same sub-pixel 210 in space, which is easy to see the granular sensation in the image quality, and thus solving the problem of the resolution and improving the defect of the color cast of the viewing angle of the liquid crystal display screen.

According to the polarity variation rule of the data signal and the polarity variation rule of the common electrode signal, the sub-pixels 210 on the display panel 100 have the following two states.

In a first embodiment, as shown in fig. 4, the step of controlling the common electrode signals on the first common electrode lines to perform polarity switching with four frames of pixel driving as one driving cycle, and the polarity switching direction of the common electrode signals on the same first common electrode line from pre-charging to charging after four frames of pixel driving sequentially comprises:

step S211, two rows of sub-pixels 210 in the same group are respectively the n _1 th row of sub-pixels 210 and the n _2 th row of sub-pixels 210;

step S212, during the driving of the pixels in the first frame of the driving cycle, when the data voltages of the n _1 th row of sub-pixels and the n _2 th row of sub-pixels are controlled to be positive, controlling the common electrode signal of the n _1 th row of sub-pixels to be switched from the first polarity before charging to the second polarity after charging, and controlling the common electrode signal of the n _2 th row of sub-pixels to be switched from the second polarity before charging to the first polarity after charging;

step S213, during the second frame pixel driving in the driving cycle, when the data voltages of the n _1 th row of sub-pixels and the n _2 th row of sub-pixels are controlled to be negative, controlling the common electrode signal of the n _1 th row of sub-pixels to be switched from the second polarity before charging to the first polarity after charging, and controlling the common electrode signal of the n _2 th row of sub-pixels to be switched from the first polarity before charging to the second polarity after charging;

step S214, during the third frame of pixel driving in the driving cycle, when the data voltages of the n _1 th row of sub-pixels and the n _2 th row of sub-pixels are controlled to be positive, controlling the common electrode signal of the n _1 th row of sub-pixels to be switched from the second polarity before charging to the first polarity after charging, and controlling the common electrode signal of the n _2 th row of sub-pixels to be switched from the first polarity before charging to the second polarity after charging;

step S215, during the fourth frame of pixel driving in the driving cycle, when the data voltages of the n _1 th row of sub-pixels and the n _2 th row of sub-pixels are controlled to be negative, the common electrode signal of the n _1 th row of sub-pixels is controlled to be switched from the first polarity before charging to the second polarity after charging, and the common electrode signal of the n _2 th row of sub-pixels is controlled to be switched from the second polarity before charging to the first polarity after charging.

In this embodiment, when the change rule of the data signal of the same subpixel 210 in the frame driving period is positive polarity driving, negative polarity driving, positive polarity driving and negative polarity driving, the driving voltage of the same subpixel 210 in the frame driving period changes along with the change, and this embodiment takes two subpixels 210 driven by the mth column data line, the nth row scanning line, the m-n _1 row first common electrode line and the m-n +2 row first common electrode line as an example, and assumes that the first polarity is low level and the second polarity is high level.

When the m-th row and n-th column scanning signal is activated in the first frame pixel driving of the driving period, the data signal Datam-n of the sub-pixel 210 connected to the scanning signal is driven with positive polarity to greater than Vcom at frame1, the sub-pixel Vpm-n _1 adjacent to the scanning signal is charged completely, the scanning signal stops being input, as shown in frame1 of fig. 5, when the common electrode signal Vstm-n _1 of the sub-pixel 210 is switched from low level to high level, and due to the parasitic capacitance, the sub-pixel Vpm-n _1 is boosted up by Δ V because the common electrode signal Vstm-n _1 is switched from low level to high level, i.e., the voltage difference between Vpm-n _1 and the reference voltage signal Vcom is changed from x to x + Δ V, and the increase of the positive polarity voltage increases the brightness of the sub-pixel 210.

And the sub-pixels Vpm-n _2 adjacent to the scan signal are charged completely, and the row scan signal stops being input, as shown in FIG. 6frame1 driving timing diagram, the Vstm-n _2 of the common electrode signal Vpm-n _2 switches from high to low, at this time, due to the parasitic capacitance, the sub-pixels Vpm-n _2 will decrease by Δ V downwards because the common electrode signal Vstm-n _2 switches from high to low, i.e. the voltage difference between Vpm-n _2 and the reference voltage signal Vcom changes from x to x- Δ V, and the decrease of the positive polarity voltage decreases the brightness of the sub-pixel 210.

In the second frame of pixel driving of the driving period, the data signal Datam-n of the sub-pixel 210 switches the negative polarity driving Datam-n < Vcom at the time of frame2, the row scan signal of the sub-pixel Vpm-n _1 stops being input, referring to fig. 5frame2 driving timing, when the common electrode signal Vstm-n _1 of the sub-pixel Vpm-n _1 switches from the high level to the low level in the opposite direction of the previous frame switching, due to the parasitic capacitance, the sub-pixel Vpm-n _1 decreases by Δ V due to the switching of the common electrode signal Vstm-n _1 from the high level to the low level, that is, the voltage difference between Vpm-n _1 and the reference voltage signal Vcom changes from-x to-x- Δ V, and the decrease of the negative polarity voltage by Δ V increases the brightness of the sub-pixel 210.

And, the sub-pixel Vpm-n _2 is charged completely and the input of the row scan signal is stopped, referring to the frame2 driving timing of fig. 6, the common electrode signal Vstm-n _2 of Vpm-n _2 is switched from low level to high level, at this time, due to the parasitic capacitance, the sub-pixel Vpm-n _2 will increase Δ V upwards because the common electrode signal Vstm-n _2 is switched from low level to high level, the voltage difference of the common electrode signal is changed from-x to-x + Δ V, and the negative voltage increases Δ V upwards to decrease the brightness of the sub-pixel 210.

In the third frame of pixel driving of the driving period, the data signal Datam-n of the sub-pixel 210 switches the positive polarity driving Datam-n > Vcom at frame3, the sub-pixel Vpm-n _1 is charged with the row scan signal and stops inputting, as described with reference to the driving timing of frame3 in fig. 5, when the common electrode signal Vstm-n _1 of the sub-pixel Vpm-n _1 switches from the high level to the low level, due to the parasitic capacitance, the sub-pixel Vpm-n _1 decreases Δ V due to the switching of the common electrode signal Vstm-n _1 from the high level to the low level, the voltage difference of the common electrode signal changes from x to x- Δ V, and the decrease of the positive polarity voltage Δ V decreases the luminance of the sub-pixel 210.

And the sub-pixel Vpm-n _2 is charged to the row scan signal stop input, as shown in the frame3 driving timing of FIG. 6, the Vpm-n _2 common electrode signal Vstm-n _2 is switched from low to high, and at this time due to the parasitic capacitance, the sub-pixel Vpm-n _2 will increase Δ V because the common electrode signal Vstm-n _2 is switched from low to high, i.e. the voltage difference between Vpm-n _2 and the reference voltage signal Vcom is changed from x to x + Δ V, and the positive voltage increases Δ V to increase the brightness of the sub-pixel 210.

In the fourth frame of pixel driving of the driving period, the data signal Datam-n of the sub-pixel 210 switches the negative polarity driving Datam-n < Vcom in frame4, and the sub-pixel Vpm-n _1 stops inputting after charging the row scan signal, as described with reference to the driving timing of frame4 in fig. 5, when the common electrode signal Vstm-n _1 of the sub-pixel Vpm-n _1 switches from the low level to the high level, due to the parasitic capacitance, the sub-pixel Vpm-n _1 will increase Δ V because the common electrode signal Vstm-n _1 switches from the low level to the high level, the voltage difference of the common electrode signal changes from-x to-x + Δ V, and the increase Δ V up to the negative polarity voltage decreases the brightness of the sub-pixel 210.

Meanwhile, after the sub-pixels Vpm-n _2 are charged and the row scan signal stops being input, as shown in the frame4 driving timing of FIG. 6, the Vpm-n _2 common electrode signal Vstm-n _2 switches from high to low, and at this time due to the parasitic capacitance, the sub-pixels Vpm-n _2 will decrease Δ V downward because the common electrode signal Vstm-n _2 switches from high to low, i.e. the voltage difference between Vpm-n _2 and the reference voltage signal Vcom changes from-x to-x- Δ V, and the negative voltage decreases Δ V downward to increase the brightness of the sub-pixel 210.

Therefore, the high and low levels of the same sub-pixel 210 are also switched in different frame driving, so that the same sub-pixel 210 does not maintain the high level or the low level, and the sub-pixel voltages of the adjacent sub-pixels 210 with the same polarity and different levels avoid the problems that the granular sensation is easily seen and the resolution is reduced in the image quality caused by the fact that the high level or the low level signal is maintained at the position of the same sub-pixel 210 in space, and the defect of color cast of the viewing angle of the liquid crystal display screen can be improved while the problem of the resolution is solved.

Further, when the second polarity is low and the first polarity is high, as shown in fig. 7 and 8, taking the m-th column data line, the n + 1-th row scan line, and the m-n +1_1 and m-n +1_2 rows of adjacent sub-pixels Vpm-n +1_1 and Vpm-n +1_2 driven by the first common electrode line as an example, the data signal Datam-n +1 connected to the scan signal is positive-polarity-driven for Datam-n +1> Vcom at frame1, the sub-pixel Vpm-n + 1-charged row scan signal stops being input, as shown in fig. 7 with reference to the frame1 driving timing, the common electrode signal Vstm-n +1_1 of the sub-pixel Vpm-n +1_1 is switched from common electrode level Vstm-n _2 to common electrode level with the previous adjacent sub-pixel 210 (Vstm-n + 1) from high to low, at this time, due to the parasitic capacitance, the sub-pixel Vpm-n +1_1 decreases by Δ V because the common electrode signal Vstm-n +1_1 switches from high to low, i.e. the voltage difference between Vpm-n +1_1 and the reference voltage signal Vcom changes from x to x- Δ V, and the decrease of the positive polarity voltage decreases the brightness of the sub-pixel 210.

Meanwhile, the sub-pixels Vpm-n +1_2 adjacent to the scan signal are charged completely, the scan signal stops being input, as shown in FIG. 8frame1 driving timing, the common electrode signal Vstm-n +1_2 of Vpm-n +1_2 switches from low to high, and at this time, due to the parasitic capacitance, the sub-pixels Vpm-n +1_2 will increase Δ V upwards because the common electrode signal Vstm-n _2 switches from low to high, i.e. the voltage difference between Vpm-n +1_2 and the reference voltage signal Vcom changes from x to x + Δ V, and the increase of the positive polarity voltage increases the brightness of the sub-pixels 210.

In the second frame of pixel driving of the driving period, the data signal Datam-n +1 of the sub-pixel 210 switches the negative polarity driving Datam-n +1< Vcom at the time of frame2, the sub-pixel Vpm-n +1_1 is charged completely, the scan signal stops being input, as shown in the driving timing of frame2 of fig. 7, when the common electrode signal Vstm-n +1_1 of the sub-pixel Vpm-n +1_1 and the common electrode driving signal (Vstm-n _2 ═ Vstm-n +1_1) of the previous adjacent sub-pixel 210 are switched from the low level to the high level, due to the existence of the parasitic capacitance, the sub-pixel Vpm-n +1_1 is increased by Δ V because the common electrode signal Vstm-n +1_1 is switched from the low level to the high level, that is, the voltage difference between the reference voltage signal Vcom of Vpm-n +1_1 and the common electrode signal is changed from-x to-x + Δ V, increasing the negative voltage by Δ V decreases the brightness of the sub-pixel 210.

Referring to FIG. 8, the frame2 driving timing illustrates the sub-pixel Vstm-n +1_2, after the sub-pixel Vpm-n +1_1 is charged, the scan signal stops being input, the common electrode signal Vstm-n +1_2 switches from high to low, and at this time, due to the parasitic capacitance, the sub-pixel Vpm-n _2 decreases by Δ V because the common electrode signal Vstm-n _2 switches from high to low, i.e. the voltage difference between Vpm-n +1_2 and the reference voltage signal Vcom changes from-x to-x- Δ V, and the decrease of the negative voltage by Δ V increases the brightness of the sub-pixel 210.

In the third frame of pixel driving of the driving period, the data signal Datam-n +1 of the sub-pixel 210 switches the positive polarity driving Datam-n +1> Vcom at frame3 of fig. 7, the sub-pixel Vpm-n +1_1 is charged completely, the scan signal stops being input, the common electrode signal Vstm-n +1_1 of the sub-pixel Vpm-n +1_1 and the common electrode driving signal (Vstm-n _2 ═ Vstm-n +1_1) of the previous adjacent sub-pixel 210 are switched from low level to high level, and due to the parasitic capacitance, the voltage difference between the sub-pixel Vpm-n +1_1 and the reference voltage signal Vcom is changed from x to x + Δ V, and the positive polarity voltage increases by Δ V to increase the brightness of the sub-pixel 210.

Meanwhile, referring to FIG. 8, frame3 driving timing, Vpm-n +1_2 common electrode signal Vstm-n +1_2 switches from high to low, and due to the parasitic capacitance, the sub-pixel Vpm-n _2 decreases Δ V due to the common electrode signal Vstm-n _2 switching from high to low, i.e. the voltage difference between Vpm-n +1_2 and the reference voltage signal Vcom changes from x to x- Δ V, and the decrease Δ V of the positive polarity voltage decreases the brightness of the sub-pixel 210.

In the fourth frame of pixel driving of the driving period, the data signal Datam-n +1 of the sub-pixel 210 switches the negative polarity driving Datam-n +1< Vcom at frame3, the sub-pixel Vpm-n +1_1 is charged completely, the scan signal stops being input, as shown in the driving timing of frame4 in fig. 7, when the common electrode signal Vstm-n +1_1 of the sub-pixel Vpm-n +1_1 and the common electrode driving signal (Vstm-n _2 ═ Vstm-n +1_1) of the previous adjacent sub-pixel 210 are switched from high level to low level, due to the existence of the parasitic capacitance, the sub-pixel Vpm-n +1_1 is decreased by Δ V because the common electrode signal Vstm-n +1_1 is switched from high level to low level, and the voltage difference between Vpm-n +1_1 and the reference voltage signal is changed from x to Vcom-x- Δ V, decreasing the negative voltage by Δ V increases the brightness of the sub-pixel 210.

Referring to FIG. 8, the frame4 driving timing shows that the Vpm-n +1_2 common electrode signal Vstm-n +1_2 switches from low to high, and due to the parasitic capacitance, the sub-pixel Vpm-n _2 increases by Δ V because the common electrode signal Vstm-n _2 switches from low to high, i.e. the voltage difference between Vpm-n +1_2 and the reference voltage signal Vcom changes from-x to-x + Δ V, and the increase of Δ V increases the brightness of the sub-pixel 210.

In a second embodiment, as shown in fig. 9, the step of controlling the common electrode signals on the first common electrode lines to perform polarity switching with four frames of pixel driving as one driving cycle, and the polarity switching direction of the common electrode signals on the same first common electrode line from pre-charging to charging after four frames of pixel driving sequentially comprises:

step S221, two rows of sub-pixels 210 in the same group are respectively an n _1 th sub-pixel 210 and an n _2 th row of sub-pixels 210;

step S222, during the driving of the pixels in the first frame of the driving cycle, when the data voltages of the n _1 th row of sub-pixels and the n _2 th row of sub-pixels are controlled to be negative, controlling the common electrode signal of the n _1 th row of sub-pixels to be switched from the first polarity before charging to the second polarity after charging, and controlling the common electrode signal of the n _2 th row of sub-pixels to be switched from the second polarity before charging to the first polarity after charging;

step S223, during the second frame pixel driving of the driving cycle, when the data voltages of the n _1 th row of sub-pixels and the n _2 th row of sub-pixels are controlled to be positive, controlling the common electrode signal of the n _1 th row of sub-pixels to be switched from the second polarity before charging to the first polarity after charging, and controlling the common electrode signal of the n _2 th row of sub-pixels to be switched from the first polarity before charging to the second polarity after charging;

step S224, during the third frame of pixel driving in the driving cycle, when the data voltages of the n _1 th row of sub-pixels and the n _2 th row of sub-pixels are controlled to be negative, controlling the common electrode signal of the n _1 th row of sub-pixels to be switched from the second polarity before charging to the first polarity after charging, and controlling the common electrode signal of the n _2 th row of sub-pixels to be switched from the first polarity before charging to the second polarity after charging;

step S225, during the fourth frame of pixel driving in the driving cycle, when the data voltages of the n _1 th row of sub-pixels and the n _2 th row of sub-pixels are controlled to be positive, the common electrode signal of the n _1 th row of sub-pixels is controlled to be switched from the first polarity before charging to the second polarity after charging, and the common electrode signal of the n _2 th row of sub-pixels is controlled to be switched from the second polarity before charging to the first polarity after charging.

In this embodiment, two sub-pixels driven by the m +1 th column data line, the n th row scan line, the m-n _1 th row first common electrode line and the m-n +2 th row first common electrode line are taken as an example for explanation, in this embodiment and the driving method in the first embodiment, the data signals are opposite, the common electrode signals change the same, therefore, it is inferred from the first embodiment that, when the first polarity is low, the second polarity is high, in the first frame of pixel driving of the driving period, the voltage difference between Vpm +1-n _1 and the reference voltage signal Vcom changes from-x to-x + Δ V, the increase of the negative polarity voltage decreases the brightness of the sub-pixel 210, meanwhile, the voltage difference between Vpm +1-n _2 and the reference voltage signal Vcom is changed from-x to-x- Δ V, and the decrease of the negative polarity voltage increases the brightness of the sub-pixel 210.

In the second frame of pixel driving of the driving period, the voltage difference between Vpm +1-n _1 and the reference voltage signal Vcom changes from x to x- Δ V, the decrease of the positive polarity voltage decreases the luminance of the sub-pixel 210, and at the same time, the voltage difference between Vpm +1-n _2 and the reference voltage signal Vcom changes from x to x + Δ V, and the increase of the positive polarity voltage increases the luminance of the sub-pixel 210.

In the third frame of pixel driving of the driving period, the voltage difference between Vpm +1-n _1 and the reference voltage signal Vcom is changed from-x to-x- Δ V, the decrease of the negative polarity voltage increases the luminance of the sub-pixel 210, and simultaneously, the voltage difference between Vpm +1-n _2 and the reference voltage signal Vcom is changed from-x to-x + Δ V, and the increase of the negative polarity voltage decreases the luminance of the sub-pixel 210.

And in the fourth frame of pixel driving of the driving period, the voltage difference between Vpm +1-n _1 and the reference voltage signal Vcom is changed from x to x + Δ V, the increase of the positive polarity voltage increases the brightness of the sub-pixel 210, and simultaneously, the voltage difference between Vpm +1-n _2 and the reference voltage signal Vcom is changed from x to x- Δ V, and the decrease of the positive polarity voltage decreases the brightness of the sub-pixel 210.

Further, when the first polarity is high and the second polarity is low, taking the m +1 th column data line, the n +1 th row scan line, the m +1-n +1_1 th row and the m +1-n +1_2 th row of adjacent sub-pixels Vpm +1-n +1_1 and Vpm +1-n +1_2 driven by the first common electrode line as an example, the present embodiment is the driving method of the first embodiment, in which the data signal is opposite and the common electrode signal changes the same, so it is inferred from the second embodiment that the voltage difference between Vpm +1-n +1_1 and the reference voltage signal Vcom is changed from-x to-x- Δ V in the first frame pixel driving of the driving period, the decrease of the negative polarity voltage increases the luminance of the sub-pixel 210, and at the same time, the voltage difference between Vpm +1-n + 1-1 _2 and the reference voltage signal is changed from-x to-x + Δ V, the increase in the negative polarity voltage decreases the luminance of the sub-pixel 210.

In the second frame of pixel driving of the driving period, the voltage difference between Vpm +1-n +1_1 and the reference voltage signal Vcom changes from x to x + Δ V, the increase of the positive polarity voltage increases the luminance of the sub-pixel 210, and at the same time, the voltage difference between Vpm +1-n +1_2 and the reference voltage signal Vcom changes from x to x- Δ V, and the decrease of the positive polarity voltage decreases the luminance of the sub-pixel 210.

In the third frame of pixel driving of the driving period, the voltage difference between Vpm +1-n +1_1 and the reference voltage signal Vcom is changed from-x to-x + Δ V, the increase of the negative polarity voltage decreases the luminance of the sub-pixel 210, and simultaneously, the voltage difference between Vpm +1-n +1_2 and the reference voltage signal Vcom is changed from-x to-x- Δ V, the decrease of the negative polarity voltage increases the luminance of the sub-pixel 210.

And in the fourth frame of pixel driving of the driving period, the voltage difference between Vpm +1-n +1_1 and the reference voltage signal Vcom is changed from x to x- Δ V, the decrease of the positive polarity voltage decreases the luminance of the sub-pixel 210, and simultaneously, the voltage difference between Vpm +1-n +1_2 and the reference voltage signal Vcom is changed from x to x + Δ V, and the increase of the positive polarity voltage increases the luminance of the sub-pixel 210.

Based on the display panel 100, the present application also proposes a driving method of the display panel 100, as shown in fig. 11, the driving method of the display panel 100 includes:

step S300, controlling the polarity switching of the data voltage on each data line when the frame pixel drive is switched;

step S400, controlling polarity switching of the common electrode signals on each first common electrode line, wherein the polarity switching directions of the common electrode signals on the same first common electrode line from the pre-charging to the charging completion in the current frame and the next frame are the same.

In this embodiment, as shown in fig. 1, the data signals are driven by column inversion, that is, in the same frame of pixel driving, the polarities of the data signals of the two sub-pixels 210 connected to the previous scan line are the same, the polarities of the data signals of the two sub-pixels 210 connected to the other scan line are the same and the same as the polarities of the data signals of the two sub-pixels 210 connected to the previous scan line, and the polarities of the data signals of the adjacent columns are opposite, so that in cooperation with the driving of the common electrode signals, the sub-pixel voltages with the same polarity and different heights of the adjacent sub-pixels 210 are finally formed, as shown in fig. 10, so as to realize relatively uniform brightness variation of the sub-pixels 210 in one column.

It is to be understood that the polarity control of the sub-pixel 210 as referred to herein means the positive polarity driving or negative polarity driving control of the sub-pixel 210. The positive driving of the sub-pixel 210 means that the voltage value of the driving voltage signal loaded on the data line is greater than the voltage value of the common electrode signal on the common electrode opposite to the pixel electrode; the negative polarity driving means that the voltage value of the driving voltage signal loaded on the data line is smaller than the voltage value of the common electrode signal on the common electrode opposite to the pixel electrode. From the viewpoint of display luminance, the display luminance of the sub-pixel 210 is large when the driving is positive, and the display luminance of the sub-pixel 210 is dark when the driving is negative. That is, the polarity of the sub-pixel 210 is determined by the voltage difference between the data signal voltage and the common voltage, and when the voltage difference is greater than 0, the polarity is positive, usually indicated by a "+" sign; when the voltage difference is less than 0, the polarity is negative, generally indicated by a "-" sign. Therefore, the opposite polarities of the data driving voltage signals of any two adjacent groups in this embodiment can be understood as follows: when the polarity of the data driving voltage signal of one group is positive, the polarity of the data driving voltage signal of the other group is negative.

In this embodiment, in the column inversion driving manner, the sub-pixels 210 on the two adjacent first common electrode lines are driven by high and low levels, and finally, the sub-pixel voltages with the same polarity and different levels of the adjacent sub-pixels 210 are formed, so that the luminance displayed by the two sub-pixels 210 in the same column in the same group is changed in brightness. In the column inversion driving method, the polarities of the driving signals of the data lines in adjacent columns are inverted so that the polarities of the sub-pixels 210 in any two adjacent columns are opposite, so that in the same group, two of the sub-pixels in two adjacent columns have high display luminance and the display luminance in the other column is dark, that is, in the same row, the adjacent sub-pixels 210 also change in luminance and in dark. When the whole display panel 100 shows such brightness variation, the display panel 100 is displayed with relatively uniform brightness, so that the problem of image quality color cast caused by viewing angle deviation is solved; in addition, the number of the scanning lines and the number of the first common electrode lines are reduced by half through the common scanning lines and the first common electrode lines, so that the effective aperture opening ratio of the display panel 100 is increased, the penetration rate is improved, and the cost is reduced.

In the embodiment, the polarity change of the data signal is changed along with the frame pixel driving change, and simultaneously, the polarity of the common electrode signal is switched in the same switching manner in the previous frame and the next frame pixel driving, that is, the switching period of the high and low level of the common electrode is the first polarity to the second polarity, and the first polarity and the second polarity are opposite polarities, and when the first polarity is the low level, the second polarity is the high level, and vice versa, therefore, when the pixel driving period is switched, the high and low levels of the same sub-pixel 210 are also switched in different frame driving, so that the same sub-pixel 210 does not maintain the high level or the low level, and the phenomenon that the high level or the low level signal at the position of the same sub-pixel 210 in space causes the easy visual graininess of the upper image quality is avoided, the problem of the resolution reduction is solved, and the defect of the color cast of the visual angle of the liquid crystal display screen can be improved at the same time.

In the third embodiment, as shown in fig. 14, the step of controlling polarity switching of the common electrode signals on the first common electrode lines, and switching the common electrode signals on the same first common electrode line from the pre-charging state to the charging state in the same polarity switching direction between the current frame and the next frame includes:

step S411, two rows of sub-pixels 210 in the same group are respectively the n _1 th row of sub-pixels 210 and the n _2 th row of sub-pixels 210;

step S412, when the current frame pixel is driven, and the data voltages of the n _1 th row of sub-pixels and the n _2 th row of sub-pixels are controlled to be positive, the common electrode signals of the n _1 th row of sub-pixels are controlled to be switched from the first polarity before charging to the second polarity after charging, and the common electrode signals of the n _2 th row of sub-pixels are controlled to be switched from the second polarity before charging to the first polarity after charging;

in step S413, when the data voltages of the n _1 th row of sub-pixels and the n _2 th row of sub-pixels are controlled to be negative during the driving of the pixels in the next frame, the common electrode signals of the n _1 th row of sub-pixels are controlled to be switched from the first polarity before charging to the second polarity after charging, and the common electrode signals of the n _2 th row of sub-pixels are controlled to be switched from the second polarity before charging to the first polarity after charging.

As shown in fig. 13, the embodiment is described by taking two sub-pixels 210 driven by the mth column data line, the nth row scan line, the m-n _1 row first common electrode line and the m-n _2 row first common electrode line as an example, when the current frame pixel is driven, the mth column nth row scan signal is active, the data signal Datam-n of the sub-pixel 210 connected to the scan signal is driven with positive polarity to greater than Vcom at frame1, the sub-pixel Vpm-n _1 adjacent to the scan signal is charged completely, the scan signal stops being input, the first polarity is assumed to be low, the second polarity is high, as shown in frame1 of fig. 13, when the common electrode signal Vstm-n _1 of the sub-pixel Vpm-n _1 is switched from low level to high level, and due to the existence of parasitic capacitance, the sub-pixel Vpm-n _1 is switched from low level to high level due to the existence of the common electrode signal Vstm-n _1 The voltage difference between the boosted voltage Δ V, i.e., Vpm-n _1 and the reference voltage signal Vcom, changes from x to x + Δ V, and the increase of the positive voltage increases the brightness of the sub-pixel 210.

And the sub-pixels Vpm-n _2 adjacent to the scan signal are charged completely, and the row scan signal stops being input, as shown in FIG. 14frame1 driving timing diagram, the Vstm-n _2 of the common electrode signal Vpm-n _2 switches from high to low, at this time, due to the parasitic capacitance, the sub-pixels Vpm-n _2 will decrease by Δ V downwards because the common electrode signal Vstm-n _2 switches from high to low, i.e. the voltage difference between Vpm-n _2 and the reference voltage signal Vcom changes from x to x- Δ V, and the decrease of the positive polarity voltage decreases the brightness of the sub-pixel 210.

In switching to the pixel driving of the next frame, the data signal Datam-n of the sub-pixel 210 switches the negative polarity driving Datam-n < Vcom at the time of frame2, the row scan signal of the sub-pixel Vpm-n _1 stops being input, referring to the driving timing of frame2 in fig. 13, at this time, the common electrode signal Vstm-n _1 of the sub-pixel Vpm-n _1 switches from the low level to the high level in the same direction as the switching of the previous frame, and at this time, due to the existence of the parasitic capacitance, the sub-pixel Vpm-n _1 will increase Δ V upwards because the common electrode signal Vstm-n _1 switches from the low level to the high level, that is, the voltage difference between Vpm-n _1 and the reference voltage signal Vcom changes from x to-x + Δ V, and the increase Δ V upwards of the negative polarity voltage decreases the luminance of the sub-pixel 210.

And, the sub-pixel Vpm-n _2 is charged completely and the input of the row scan signal is stopped, referring to the frame2 driving timing of fig. 14, the common electrode signal Vstm-n _2 of Vpm-n _2 is switched from high level to low level, at this time, due to the parasitic capacitance, the sub-pixel Vpm-n _2 is decreased by Δ V since the common electrode signal Vstm-n _2 is switched from low level to high level, the voltage difference of the common electrode signal is changed from-x to- Δ V, and the negative voltage is decreased by Δ V to increase the brightness of the sub-pixel 210.

The high and low levels of the same sub-pixel 210 are also switched in different frame driving, so that the same sub-pixel 210 cannot maintain the high level or the low level, and the problems that the granular sensation is easily seen and the resolution is reduced in the image quality due to the fact that the high level or the low level signal is maintained at the position of the same sub-pixel 210 in space are solved, and the defect of color cast of the visual angle of the liquid crystal display screen can be improved while the resolution problem is solved.

Further, when the first polarity is high and the second polarity is low, referring to the frame1 driving timing of fig. 15, the common electrode signal Vstm-n +1_1 of the sub-pixel Vpm-n +1_1 and the common electrode driving signal Vstm-n +1_1 of the previous adjacent sub-pixel 210 (Vstm-n _2 ═ Vstm-n +1_1) are switched from high to low, and due to the parasitic capacitance, the sub-pixel Vpm-n +1_1 is decreased by Δ V due to the common electrode signal Vstm-n +1_1 being switched from high to low, that is, the voltage difference between Vpm-n +1_1 and the reference voltage signal Vcom is changed from x to x- Δ V, and the positive voltage is decreased to decrease the luminance of the sub-pixel 210.

Meanwhile, the sub-pixels Vpm-n +1_2 adjacent to the scan signal are charged completely, the scan signal stops being input, as shown in FIG. 16, frame1, the common electrode signal Vstm-n +1_2 of Vpm-n +1_2 switches from low to high, and at this time, due to the parasitic capacitance, the sub-pixels Vpm-n +1_2 will increase Δ V upwards because the common electrode signal Vstm-n _2 switches from low to high, i.e. the voltage difference between Vpm-n +1_2 and the reference voltage signal Vcom changes from x to x + Δ V, and the increase of the positive voltage increases the brightness of the sub-pixels 210.

In the next frame of pixel driving, the data signal Datam-n +1 of the sub-pixel 210 switches the negative polarity driving Datam-n +1< Vcom at the time of frame2, the sub-pixel Vpm-n +1_1 is charged completely, the scan signal stops being input, as shown in fig. 15frame2 driving timing, when the sub-pixel Vpm-n +1_1 common electrode signal Vstm-n +1_1 and the previous adjacent sub-pixel 210 share the common electrode driving signal (Vstm-n _2 ═ Vstm-n +1_1) is switched from high level to low level, due to the parasitic capacitance, the sub-pixel Vpm-n +1_1 decreases downwards to Δ V because the common electrode signal Vstm-n +1_1 is switched from low level to high level, that is, the voltage difference between the reference voltage signal Vcom and the common electrode signal Vpm-n +1_1 changes from-x to- Δ V, decreasing the negative voltage by Δ V increases the brightness of the sub-pixel 210.

Referring to FIG. 16, the frame2 driving timing illustrates the sub-pixel Vstm-n +1_2, after the sub-pixel Vpm-n +1_1 is charged, the scan signal stops being input, the common electrode signal Vstm-n +1_2 is switched from low to high, and at this time, due to the parasitic capacitance, the sub-pixel Vpm-n _2 will increase Δ V upwards because the common electrode signal Vstm-n _2 is switched from low to high, i.e. the voltage difference between Vpm-n +1_2 and the reference voltage signal Vcom is changed from-x to-x + Δ V, and the negative voltage increases Δ V upwards to decrease the brightness of the sub-pixel 210.

In the fourth embodiment, as shown in fig. 17, the step of controlling polarity switching of the common electrode signals on the first common electrode lines, and switching the common electrode signals on the same first common electrode line from the pre-charging state to the charging state in the same polarity switching direction between the current frame and the next frame includes:

step S421, two rows of sub-pixels 210 in the same group are respectively the n _1 th row of sub-pixels 210 and the n _2 th row of sub-pixels 210;

step S422, when the current frame pixel is driven, and the data voltages of the n _1 th row of sub-pixels and the n _2 th row of sub-pixels are controlled to be negative, the common electrode signals of the n _1 th row of sub-pixels are controlled to be switched from the first polarity before charging to the second polarity after charging, and the common electrode signals of the n _2 th row of sub-pixels are controlled to be switched from the second polarity before charging to the first polarity after charging;

step S423, during the driving of the pixels in the next frame, when the data voltages of the n _1 th row of sub-pixels and the n _2 th row of sub-pixels are controlled to have positive polarity, controlling the common electrode signal of the n _1 th row of sub-pixels to be switched from the first polarity before charging to the second polarity after charging, and controlling the common electrode signal of the n _2 th row of sub-pixels to be switched from the second polarity before charging to the first polarity after charging.

In this embodiment, two sub-pixels driven by the m +1 th column data line, the n th row scan line, the m-n _1 th row first common electrode line and the m-n _2 th row first common electrode line are taken as an example for explanation, in this embodiment and the driving method in the third embodiment, the data signals are opposite, the common electrode signals change the same, therefore, it is inferred from the third embodiment that, when the first polarity is low level, the second polarity is high level, in the current frame pixel driving, the voltage difference between Vpm +1-n _1 and the reference voltage signal Vcom changes from-x to-x + Δ V, the increase of the negative polarity voltage decreases the brightness of the sub-pixel 210, meanwhile, the voltage difference between Vpm +1-n _2 and the reference voltage signal Vcom is changed from-x to-x- Δ V, and the decrease of the negative polarity voltage increases the brightness of the sub-pixel 210.

In the next frame of pixel driving, the voltage difference between Vpm +1-n _1 and the reference voltage signal Vcom changes from x to x + Δ V, and the increase of positive polarity voltage increases the brightness of the sub-pixel 210, and at the same time, the voltage difference between Vpm +1-n _2 and the reference voltage signal Vcom changes from x to x + Δ V, and the increase of positive polarity voltage increases the brightness of the sub-pixel 210.

Further, when the first polarity is high and the second polarity is low, it can be inferred from the third embodiment that the voltage difference between Vpm +1-n +1_1 and the reference voltage signal Vcom is changed from-x to-x- Δ V in the first frame of pixel driving in the driving period, the decrease of the negative polarity voltage increases the luminance of the sub-pixel 210, and the voltage difference between Vpm +1-n +1_2 and the reference voltage signal Vcom is changed from-x to-x + Δ V, and the increase of the negative polarity voltage decreases the luminance of the sub-pixel 210.

In the second frame of pixel driving of the driving period, the voltage difference between Vpm +1-n +1_1 and the reference voltage signal Vcom changes from x to x- Δ V, the decrease of the positive polarity voltage decreases the luminance of the sub-pixel 210, and at the same time, the voltage difference between Vpm +1-n +1_2 and the reference voltage signal Vcom changes from x to x + Δ V, and the increase of the positive polarity voltage increases the luminance of the sub-pixel 210.

The present invention also provides a driving apparatus of a display panel 100, wherein the display panel 100 comprises:

a plurality of pixel groups 101, each pixel group 101 including two adjacent rows of sub-pixel groups 101n/101n +1, the two adjacent rows of sub-pixel groups 101n connecting to the same data line Datam and to one scan line Gm-n and Gm-n +1, each sub-pixel group including two sub-pixels, two sub-pixels of each sub-pixel group being connected to the same scan line and to the same data line, storage capacitors of the two sub-pixels being connected to one first common electrode line Vstm-n _1 and Vstm-n _2 or Vstm-n +1_1 and Vstm-n +1_2, respectively, storage capacitors of two adjacent sub-pixels in the two adjacent rows of sub-pixel groups being connected to the same first common electrode line, and pixel capacitors of each sub-pixel being connected to a common electrode pair Vcom; the polarities of the voltages on the two adjacent first common electrode lines are opposite, and the polarities of the voltages on the two adjacent data lines are opposite.

In this embodiment, the display panel 100 is provided with a pixel array (not shown), a scan line G, a data line Datam, a first common electrode line Vstm-n _1, Vstm-n _2, Vstm-n +1_2, and a second common electrode line Vcom, where the pixel array includes a plurality of sub-pixels. Each sub-pixel comprises an active switch (thin film transistor), a pixel capacitor Clc and a storage capacitor Cst, wherein a gate of the active switch is electrically connected to the scan line G corresponding to the sub-pixel, a source of the active switch is electrically connected to the data line corresponding to the sub-pixel, a drain of the active switch is electrically connected to one end of the pixel capacitor Clc and the storage capacitor Cst of the sub-pixel through the data line, and another end of each pixel capacitor Clc is electrically connected to the second common electrode line Vcom. In the present embodiment, two rows of sub-pixels are defined as a sub-pixel group 101, and the other ends of the storage capacitors Cst of the two sub-pixel groups 101 are respectively connected to a first common electrode line Vst 1. Each sub-pixel is divided into three sub-pixel groups 101 of red, green and blue. Every three sub-pixels of red, green and blue form a pixel. A plurality of thin film transistors constitute the thin film transistor array of the present embodiment.

As shown in fig. 18, the driving apparatus of the display panel 100 further includes:

a source driver circuit 20, a plurality of output terminals of the source driver circuit 20 being connected to the respective data lines, the source driver circuit 20 being configured to output data voltages with positive and negative polarities switched to the respective data lines at the time of switching of the driving of the frame pixels;

a common electrode voltage circuit 50, an output terminal of the common electrode voltage circuit 50 being connected to each of the first common electrode lines and each of the pixel electrode opposite side common electrodes Vcom, respectively, the common electrode voltage circuit 50 being configured to output a common electrode signal with a polarity switched to each of the first common electrode lines and to provide a reference voltage signal to the pixel electrode opposite side common electrodes Vcom;

the driving apparatus of the display panel 100 is further provided with a processor, a memory, and a driver of the display panel 100 stored on the memory and operable on the processor, the driver of the display panel 100 being configured to implement the steps of the driving method of the display panel 100 as described above.

In this embodiment, the processor may be a timing controller 10, the timing controller 10 is connected to the source driving circuit 20 and the gate driving circuit 30 respectively to provide timing control signals for the source driving circuit 20 and the gate driving circuit 30, the timing controller 10 receives image data of a picture to be displayed sent from a front end during driving of each frame, and the timing controller 10 converts the image data and the control signals received from the front end into data signals, control signals, and clock signals suitable for the source driver and the gate driver. The source driver converts the received digital signals into corresponding gray scale voltage signals, when the gate driver scans line by line, all the column data signal lines transmit data signals to the pixel row, each sub-pixel capacitor in the pixel row is charged, signal voltage writing and maintaining of the pixel are realized, liquid crystal molecules of the sub-pixels rotate under the voltage, transmittance of incident light passing through the liquid crystal molecules is changed, namely, a light valve effect on the incident light is realized, change of projection light brightness is realized, and finally image display of the display panel 100 is realized. The signals Output to the gate driver include a Start Vertical (STV) signal, a Clock Pulse Vertical (CPV) signal, an Enable signal (OE), and the like.

The common electrode voltage circuit 50 is connected to the first common electrode lines and the pixel electrode opposite side common electrode Vcom to provide the pixel electrode opposite side common electrode Vcom with a reference voltage signal, the common electrode voltage circuit 50 further provides the two adjacent first common electrode lines with common electrode signals with opposite polarities, in a pixel driving period, the common electrode signals on the same first common electrode line are subjected to polarity switching according to that four-frame pixel driving is taken as one driving period, and in the four-frame pixel driving, the polarity switching direction from charging before to charging is sequentially switched from the first polarity to the second polarity, from the second polarity to the first polarity, and from the first polarity to the second polarity; or

The common electrode signals on the same first common electrode line are switched to the same polarity switching direction from charging completion to charging completion in the current frame and the next frame.

In an embodiment, the driving apparatus of the display panel 100 further includes a gate driving circuit 30, and the gate driving circuit 30 is connected to each of the scan lines; the gate driving circuit 30 is configured to output row scanning signals to each scanning line row by row, so that a corresponding data voltage is applied to the data line, and the sub-pixel capacitors in the corresponding row are charged.

The present invention further includes a display device, which includes a display panel 100 and the driving device of the display panel 100 as described above, wherein the driving device of the display panel 100 is connected to each sub-pixel of the display panel 100. The detailed structure of the driving apparatus of the display panel 100 can refer to the above embodiments, and is not described herein; it can be understood that, since the driving device of the display panel 100 is used in the display device of the present invention, the embodiment of the display device of the present invention includes all technical solutions of all embodiments of the driving device of the display panel 100, and the achieved technical effects are also completely the same, and are not described herein again.

In the above embodiments, the display panel 100 includes, but is not limited to, a liquid crystal display panel 100, an organic light emitting diode display panel 100, a field emission display panel 100, a plasma display panel 100, a curved panel, and the like, and the liquid crystal panel includes a thin film transistor liquid crystal display panel 100, a TN panel, a VA panel, an IPS panel, and the like.

The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications and equivalents of the technical solutions that can be directly or indirectly applied to other related fields without departing from the spirit of the present application are intended to be included in the scope of the present application.

Claims

1. A driving method of a display panel, the display panel comprising:

the driving method of the display panel includes the steps of:

2. The method according to claim 1, wherein the step of controlling the common electrode signals on the first common electrode lines to switch polarity in one driving cycle of four-frame pixel driving, and the step of controlling the common electrode signals on the same first common electrode lines to switch from the first polarity to the second polarity, from the polarity switching direction of switching before charging to charging completion, from the first polarity to the second polarity, from the second polarity to the first polarity, and from the first polarity to the second polarity sequentially comprises:

3. The method according to claim 1, wherein the step of controlling the common electrode signals on the first common electrode lines to switch polarity in one driving cycle of four-frame pixel driving, and the step of controlling the common electrode signals on the same first common electrode lines to switch from the first polarity to the second polarity, from the polarity switching direction of switching before charging to charging completion, from the first polarity to the second polarity, from the second polarity to the first polarity, and from the first polarity to the second polarity sequentially comprises:

4. A driving method of a display panel, the display panel comprising:

the driving method of the display panel includes the steps of:

5. The method according to claim 4, wherein the step of controlling polarity switching of the common electrode signal on each first common electrode line, and the polarity switching direction of the common electrode signal on the same first common electrode line from the pre-charging to the post-charging in the current frame and the next frame is the same comprises:

6. The method according to claim 4, wherein the step of controlling polarity switching of the common electrode signal on each first common electrode line, and the polarity switching direction of the common electrode signal on the same first common electrode line from the pre-charging to the post-charging in the current frame and the next frame is the same comprises:

7. A driving apparatus of a display panel, the display panel comprising:

a common electrode voltage circuit, an output terminal of which is respectively connected to each first common electrode line and each pixel electrode opposite side common electrode, the common electrode voltage circuit being configured to output a common electrode signal with switched polarity to each first common electrode line and to provide a reference voltage signal to the pixel electrode opposite side common electrode;

the driving apparatus of a display panel is further provided with a processor, a memory, and a driver of a display panel stored on the memory and operable on the processor, the driver of the display panel being configured to implement the steps of the driving method of a display panel according to any one of claims 1 to 6.

8. The driving apparatus of a display panel according to claim 7, further comprising a gate driving circuit connected to each of the scanning lines; the gate driving circuit is configured to output row scanning signals to each scanning line row by row so as to apply corresponding data voltages to the data lines and realize charging of the sub-pixel capacitors of the corresponding row.

9. The driving apparatus of a display panel according to claim 8, further comprising a timing controller connected to the gate driving circuit and the source driving circuit, respectively; the timing controller is configured to output a timing control signal to the gate driving circuit and the source driving circuit.

10. A display device comprising a display panel and a driving device of the display panel according to any one of claims 7 to 9, wherein the driving device of the display panel is connected to each sub-pixel of the display panel.