Method and device for driving touch display panel

Patent metadata

Field	Value
Publication number	US-11237664-B2
Application number	US-201916766677-A
Country	US
Kind code	B2
Filing date	Nov 8, 2019
Priority date	Jan 2, 2019
Publication date	Feb 1, 2022
Grant date	Feb 1, 2022

Abstract

The present disclosure discloses a driving method and device of a touch display panel. The driving method includes: acquiring image data of an image to be displayed; judging whether the acquired image data is a reloaded picture with a default polarity mode; performing polarity adjustment on the image data when judging that the image data is a reloaded picture with a default polarity mode; and driving the touch display panel to display image according to the image data after polarity adjustment. Wherein the default polarity mode includes: the polarities of image data corresponding to each two adjacent data lines are opposite, while the polarities of image data corresponding to the same data line are the same.

First claim

The invention claimed is:

1. A method for driving a touch display panel, comprising:
acquiring image data of an image to be displayed;
judging whether the acquired image data is a reloaded picture with a default polarity mode, wherein the default polarity mode comprises: polarities of the image data corresponding to each two adjacent data lines are opposite, and polarities of the image data corresponding to a same data line are the same;
performing polarity adjustment on the image data when judging that the image data is the reloaded picture with the default polarity mode; and
driving the touch display panel to display image according to the image data after polarity adjustment.

2. The driving method of claim 1 , wherein the judging whether the acquired image data is the reloaded picture with the default polarity mode comprises:
determining a quantity of first data lines and a quantity of second data lines loading the image data according to the acquired image data, wherein the first data lines are data lines with a voltage increase amplitude, from the image data loaded at a first moment to the image data loaded at a second moment, being greater than or equal to a threshold value; the second data lines are data lines with a voltage reduction amplitude, from the image data loaded at the first moment to the image data loaded at the second moment, being greater than or equal to the threshold value; the first moment is a moment at which an n th gate line loads a gate opening signal, the second moment is a moment at which an (n+1) th gate line loads the gate opening signal, and n is an integer greater than or equal to 1; the threshold value is a voltage difference between a first image data and a second image data which have a same polarity, and gray scales corresponding to the first image data differ from gray scales corresponding to the second image data by at least 2 gray scales; and
when a ratio of the quantity of the first data lines to the quantity of the second data lines is smaller than or equal to 1/2, or when a ratio of the quantity of the first data lines to the quantity of the second data lines is greater than 2, determining the image data to be the reloaded picture with the default polarity mode, otherwise determining the image data not to be the reloaded picture with the default polarity mode.

3. The driving method of claim 2 , wherein the reloaded picture comprises: one or a combination of a checkerboard picture or a striped picture.

4. The driving method of claim 3 , wherein the reloaded picture comprises: the checkerboard picture; and the judging whether the acquired image data is the checkerboard picture with the default polarity mode comprises:
determining an arrangement mode of first image blocks and second image blocks formed by loading the image data according to the acquired image data; wherein each first image block comprises at least one sub-pixel; each second image block comprises at least one sub-pixel; a quantity of sub-pixels contained in the each first image block is the same as a quantity of sub-pixels contained in the each second image block; and gray scales corresponding to the each first image block differ from gray scales corresponding to the each second image block at least by 2 gray scales; and
when the first image blocks and the second image blocks are all arranged alternately along a direction of rows and columns, and the polarities of the image data corresponding to each two adjacent data lines are opposite, determining the image data to be the checkerboard picture with the default polarity mode, otherwise determining the image data not to be the checkerboard picture with the default polarity mode.

5. The driving method of claim 4 , wherein a row of sub-pixels of the touch display panel are correspondingly electrically connected with a same gate line; the each first image block comprises: 2k+1 columns of sub-pixels arranged in a row direction; the each second image block comprises: 2k+1 columns of sub-pixels arranged in the row direction; and k is a positive integer;
and the method further comprises:
dividing data lines in the touch display panel into multiple data line groups, wherein each data line group comprises a number of data lines, and a is a multiple of 2;
the performing polarity adjustment on the image data comprises:
when determining that the image data is the checkerboard picture with the default polarity mode, adjusting the polarities of the image data loaded by a same data line group to be the same, and adjusting the polarities of the image data loaded by two adjacent data line groups to be opposite.

6. The driving method of claim 5 , wherein the quantity of sub-pixels contained in the each first image block is one; or,
the quantity of sub-pixels contained in the each first image block is two, and the sub-pixels contained in the each first image block and the sub-pixels contained in the each second image block are arranged along an extension direction of the data lines.

7. The driving method of claim 4 , wherein a row of sub-pixels of the touch display panel are correspondingly connected with two gate lines adjacent to the row of sub-pixels; the each first image block comprises: 2y columns of sub-pixels arranged in a row direction, and the each second image block comprises: 2y columns of sub-pixels arranged in the row direction; and
y is a positive integer; and the method further comprises:
dividing data lines in the touch display panel into multiple data line groups, wherein each data line group comprises b number of data lines, and b is a multiple of 2;
the performing polarity adjustment on the image data comprises:
when determining that the image data is the checkerboard picture with the default polarity mode, adjusting polarities of the image data loaded by a same data line group to be the same, and adjusting polarities of the image data loaded by two adjacent data line groups to be opposite.

8. The driving method of claim 7 , wherein the quantity of sub-pixels contained in the each first image block is two, and the sub-pixels contained in the each first image block and the sub-pixels contained in the each second image block are arranged along an extension direction of the gate lines.

9. The driving method of claim 8 , wherein the touch display panel comprises a first sub-pixel column to a Q th sub-pixel column arranged along the extension direction of the gate lines; and Q is a positive even number; and the method further comprises:
dividing two adjacent columns from the first sub-pixel column to the Q th sub-pixel column into a second sub-pixel column group, wherein each second sub-pixel column group comprises the first image blocks and the second image blocks which are arranged alternately along a column direction; or,
dividing two adjacent columns from a second sub-pixel column to a (Q−1) th sub-pixel column into a first sub-pixel column group, wherein each first sub-pixel column group comprises the first image blocks and the second image blocks which are arranged alternately along a column direction; and the first sub-pixel column and the Q th sub-pixel column respectively comprise the first sub-pixels and the second sub-pixels which are arranged alternately; wherein gray scales corresponding to the first sub-pixels are roughly the same as the gray scales corresponding to the each first image block, gray scales corresponding to the second sub-pixels are roughly the same as the gray scales corresponding to the each second image block, and the first sub-pixels and the second image blocks are adjacent in the row direction, and the second sub-pixels and the first image blocks are adjacent in the row direction.

10. The driving method of claim 3 ,

Assignees

• Hefei Boe Optoelectronics Tech
• Boe Technology Group Co Ltd

Inventors

• Fang Zhixiang
• Zheng Liangliang
• Yang Guanglei
• Ding Peng

Classifications

• G09G2320/0257

  Reduction of after-image effects · CPC title

• G09G2300/0439

  Pixel structures · CPC title

• G09G3/3614

  Control of polarity reversal in general · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• G06F3/041 Primary

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title