Display apparatus and driving method thereof

Patent metadata

Field	Value
Publication number	US-10403223-B2
Application number	US-201815954603-A
Country	US
Kind code	B2
Filing date	Apr 17, 2018
Priority date	Jul 5, 2017
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

Abstract

A display apparatus and a driving method thereof are provided. A data driving chip provides a plurality of data voltages to a plurality of multiplexers through a plurality of output lines. When the display apparatus displays a pure gray pattern, the data voltages are alternately provided to a first data line group and a second data line group during a scan line driving period of each of the scan lines to make two adjacent pixels have different polarities. During a blank period, a plurality of data lines corresponding to a plurality of pixels having the same color and the same polarity on two adjacent scan lines are electrically coupled to each other through the data driving chip to share charges.

First claim

What is claimed is:

1. A display apparatus, comprising:
a plurality of scan lines;
a first data line group comprising a plurality of first data lines;
a second data line group comprising a plurality of second data lines;
a plurality of pixels disposed on intersections of the plurality of scan lines and the plurality of data lines and electrically coupled to the plurality of scan lines and the plurality of data lines corresponding to the plurality of pixels;
a plurality of multiplexers respectively electrically coupled to the plurality of first data lines and the plurality of second data lines corresponding to the plurality of multiplexers, the plurality of multiplexers alternately providing a plurality of data voltages to the first data line group and the second data line group during a scan line driving period of each of the plurality of scan lines; and
a data driving chip having a plurality of output lines, the plurality of output lines being respectively electrically coupled to the plurality of multiplexers and providing a plurality of data voltages to the plurality of multiplexers, wherein two adjacent output lines of the plurality of output lines provide data voltages with different polarities, so that two adjacent pixels of the plurality of pixels have different polarities, wherein when the display apparatus displays a pure gray pattern, the plurality of data lines corresponding to the plurality of pixels having the same color and the same polarity on two adjacent scan lines of the plurality of scan lines are electrically coupled to each other through the data driving chip during a blank period to share charges.

2. The display apparatus according to claim 1 , wherein the first data line group and the second data line group respectively have a different driving order during the scan line driving period of the adjacent scan lines.

3. The display apparatus according to claim 2 , further comprising a first switch element, a second switch element, a third switch element, a fourth switch element, a fifth switch element, and a sixth switch element, the plurality of output lines being divided into a plurality of output line groups, each of the plurality of output line groups comprising a first output line, a second output line, a third output line, a fourth output line, a fifth output line, and a sixth output line arranged adjacently in order, wherein the first switch element is coupled between the second output line and the fourth output line, the second switch element is coupled between the third output line and the fifth output line, the third switch element is coupled between the first output line and the third output line, the fourth switch element is coupled between the second output line and the sixth output line, the fifth switch element is coupled between the fourth output line and the sixth output line, and the sixth switch element is coupled between the first output line and the fifth output line.

4. The display apparatus according to claim 1 , wherein a plurality of data line groups sharing charges during two adjacent blank periods are different data line groups.

5. The display apparatus according to claim 1 , wherein the plurality of pixels on one data line of the plurality of data lines are arranged in a zigzag manner.

6. The display apparatus according to claim 1 , wherein a length of time for sharing the charges during each blank period is different.

7. The display apparatus according to claim 1 , further comprising:
a scan driving chip coupled to the plurality of scan lines and driving the plurality of scan lines in order.

8. The display apparatus according to claim 1 , wherein two adjacent multiplexers of the plurality of multiplexers are respectively electrically coupled to two of the plurality of first data lines, the two of the plurality of first data lines are adjacent to each other, the two adjacent multiplexers of the plurality of multiplexers are respectively electrically coupled to two of the plurality of second data lines, and the two of the plurality of second data lines are adjacent to each other.

9. The display apparatus according to claim 1 , wherein two adjacent multiplexers of the plurality of multiplexers are respectively electrically coupled to two of the plurality of first data lines, the two of the plurality of first data lines are adjacent to each other, the two adjacent multiplexers are respectively electrically coupled to two of the plurality of second data lines, and the two of the plurality of first data lines are located between the two of the plurality of second data lines.

10. The display apparatus according to claim 1 , wherein two adjacent multiplexers of the plurality of multiplexers are respectively electrically coupled to two of the plurality of second data lines, the two of the plurality of second data lines are adjacent to each other, the two adjacent multiplexers are respectively electrically coupled to two of the plurality of first data lines, and the two of the plurality of second data lines are located between the two of the plurality of first data lines.

11. A driving method of a display apparatus, the display apparatus comprising a plurality of scan lines, a first data line group, a second data line group, and a plurality of pixels, the plurality of pixels being disposed on intersections of the plurality of scan lines and the plurality of data lines and electrically coupled to the plurality of scan lines and the plurality of data lines corresponding to the plurality of pixels, wherein two adjacent pixels of the plurality of pixels have different polarities, and the driving method of the display apparatus comprises:
when the display apparatus displays a pure gray pattern, providing a plurality of data voltages alternately to the first data line group and the second data line group during a scan line driving period of each of the plurality of scan lines; and
connecting the plurality of data lines corresponding to the plurality of pixels having the same color and the same polarity on adjacent scan lines of the plurality of scan lines during a blank period to share charges.

12. The driving method of the display apparatus according to claim 11 , wherein the first data line group and the second data line group respectively have different driving orders during the scan line driving periods of the adjacent scan lines, and a plurality of data line groups sharing the charges during two adjacent blank periods are different data line groups.

13. The driving method of the display apparatus according to claim 11 , comprising:
adjusting a length of time for sharing the charges according to a color of the pure gray pattern.

14. A display apparatus, comprising:
a plurality of scan lines comprising a first scan line, a second scan line, and a third scan line arranged adjacently in order;
a first data line group comprising a plurality of first data lines;
a second data line group comprising a plurality of second data lines;
a plurality of pixels disposed on intersections of the plurality of scan lines and the plurality of data lines and electrically coupled to the plurality of scan lines and the plurality of data lines corresponding to the plurality of pixels;
a plurality of multiplexers respectively electrically coupled to the plurality of first data lines and the plurality of second data lines corresponding to the plurality of multiplexers;
a data driving chip electrically coupled to the plurality of multiplexers; and
a scan driving chip comprising a first scan signal, a second scan signal, and a third scan signal, wherein the first scan line receives the first scan signal, the second scan line

Assignees

• Au Optronics Corp

Inventors

• Wen Chun-Kuei
• Shih Hung-Min

Classifications

• G09G2310/0297

  Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns · CPC title

• G09G2330/021

  Power management, e.g. power saving · CPC title

• G09G3/3614

  Control of polarity reversal in general · CPC title

• G09G3/3677 Primary

  suitable for active matrices only · CPC title

• G09G3/2018

  by time modulation using two or more time intervals · CPC title