Display device and method of driving the same

Patent metadata

Field	Value
Publication number	US-10186194-B2
Application number	US-201514933730-A
Country	US
Kind code	B2
Filing date	Nov 5, 2015
Priority date	May 10, 2013
Publication date	Jan 22, 2019
Grant date	Jan 22, 2019

Abstract

A display device is provided including a display unit including a plurality of color pixels; a scan driver that sequentially applies a gate-on voltage scan signal to a plurality of scan lines that are connected to the color pixels; a demux unit that is connected to a plurality of color data lines that are connected to the color pixels, and that sequentially selects the plurality color data lines at a predetermined time interval; and a data driver that applies a data signal to each of the plurality of color data lines that are sequentially selected in the demux unit, and that applies a previous data signal to at least one of the plurality of color data lines during the predetermined time interval, wherein the previous data signal has a same voltage as a voltage applied to one of the plurality of color data lines before the predetermined time interval.

First claim

What is claimed is:

1. A display device, comprising:
a display unit including a plurality of first color pixels, a plurality of second color pixels, and a plurality of third color pixels;
a scan driver that sequentially applies a gate-on voltage scan signal to a plurality of scan lines that are connected to the plurality of first color pixels, the plurality of second color pixels, and the plurality of third color pixels;
a demux unit that is connected to a plurality of first sub-data lines and a plurality of second sub-data lines; the plurality of first sub-data lines are directly connected to the plurality of first color pixels and the plurality of third color pixels, the first color pixels and the third color pixels are alternatively arranged according to the first sub-data lines, and a plurality of second sub-data lines are directly connected to the plurality of second color pixels, the second color pixels are only arranged according to the second sub-data lines, wherein the demux unit is configured to sequentially select the plurality of first sub-data lines and the plurality of second sub-data lines at a predetermined time interval; and
a data driver configured to apply a data signal to each of the plurality of first sub-data lines and the plurality of second sub-data lines that are sequentially selected in the demux unit, and configured to apply a previous data signal to the plurality of first sub-data lines and the plurality of second sub-data lines, wherein the previous data signal has a same voltage as a voltage applied to one of the plurality of first sub-data lines and the plurality of second sub-data lines at an immediately preceding scan line segment before the predetermined time interval,
wherein the data driver applies a first previous data signal applied to the plurality of first sub-data lines at a first scan line segment to the first sub-data line during a first time interval before the plurality of first sub-data lines are selected at a second scan line segment following the first scan line segment, and applies a second previous data signal applied to the plurality of first sub-data lines at the second scan line segment to the first sub-data line during the first time interval that is included in a third scan line segment following the second scan line segment, and
wherein the data driver applies a third previous data signal applied to the plurality of second sub-data lines at the first scan line segment to the second sub-data line during a second time interval before the plurality of second sub-data lines are selected at the second scan line segment, and applies a fourth previous data signal applied to the plurality of second sub-data lines at the second scan line segment to the second sub-data line during the second time interval at the third scan line segment.

2. The display device of claim 1 , wherein the demux unit repeatedly selects the plurality of first sub-data lines and the plurality of sub-data lines in a scan line unit.

3. A method of driving a display device, the method comprising:
applying a first data signal having a same voltage as a data signal applied to a first color data line during a first scan line segment to the first color data line during a first time interval that is included in a second scan line segment that follows the first scan line segment;
applying a third data signal to the first color data line to which the first data signal is applied;
applying a second data signal having a same voltage as a data signal applied to a second color data line during the first scan line segment to the second color data line during a second time interval that is included in the second scan line segment;
applying a fourth data signal to the second color data line to which the second data signal is applied;
applying a fifth data signal having a same voltage as a data signal applied to a third color data line during the first scan line segment to the third color data line during a third time interval that is included in the second scan line segment; and
applying a sixth data signal to the third color data line to which the fifth data signal is applied,
wherein a first color pixel is connected to the first color data line, a second color pixel is connected to the second color data line, and a third color pixel is connected to the third color data line.

4. The method of claim 3 , wherein the first time interval is a time period between a time when an on-voltage is applied to a horizontal synchronization signal in a scan line unit and a time at which the third data signal is applied to the first color data line.

5. The method of claim 3 , wherein the second time interval is a time period between the time at which the third data signal is applied to the first color data line and a time at which the fourth data signal is applied to the second color data line.

6. The method of claim 3 , wherein the third time interval is a time period between the time at which the fourth data signal is applied to the second color data line and a time at which the sixth data signal is applied to the third color data line.

Assignees

• Samsung Display Co Ltd

Inventors

• Fujii Mitsuru

Classifications

• G09G3/3233 Primary

  with pixel circuitry controlling the current through the light-emitting element · CPC title

• G09G2330/025

  Reduction of instantaneous peaks of current · CPC title

• G09G2320/0219

  Reducing feedthrough effects in active matrix panels, i.e. voltage changes on the scan electrode influencing the pixel voltage due to capacitive coupling · CPC title

• G09G3/3266

  Details of drivers for scan electrodes · CPC title

• G09G2330/021

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