Light emitting element display device and method for driving the same

Patent metadata

Field	Value
Publication number	US-2016019842-A1
Application number	US-201514657169-A
Country	US
Kind code	A1
Filing date	Mar 13, 2015
Priority date	Jul 17, 2014
Publication date	Jan 21, 2016
Grant date	—

Abstract

A display device includes a data driver and a demultiplexer. The data driver supplies an image data signal to the demultiplexer. The demultiplexer timely divides the image data signal and outputs the divided image data signal to a data line. The demultiplexer supplies the image data signal to a first pixel column, and supplies the image data signal to a second pixel column after a predetermined time elapses, during a first frame period. The demultiplexer supplies the image data signal to the second pixel column, and supplies the image data signal to the first pixel column after a predetermined time elapses, during a second frame period.

First claim

What is claimed is:

1 . A display device, comprising:
a display panel; a plurality of pixel columns on the display panel, each of the pixel columns including at least one pixel; a scan line coupled to the at least one pixel; a data line coupled to the at least one pixel; a demultiplexer to timely divide an image data signal based on control signals and to output the divided image data signal to the data line; and a data driver to supply the image data signal to the demultiplexer, wherein the demultiplexer, during a first frame period, is to supply the image data signal to a first pixel column and supply the image data signal to a second pixel column after a predetermined time elapses, and during a second frame period is to supply the image data signal to the second pixel column and supply the image data signal to the first pixel column after a predetermined time elapses.

2 . The display device as claimed in claim 1 , further comprising:
a controller to supply the control signals which determine an order of driving the pixel columns.

3 . The display device as claimed in claim 2 , wherein the controller is to change the control signals with respect to the respective frame periods.

4 . The display device as claimed in claim 1 , wherein the demultiplexer is to timely divide image data signals of a same color.

5 . The display device as claimed in claim 4 , wherein the demultiplexer is to timely divide image data signals and is to supply the divided image data signals to data lines connected to pixels of a same color.

6 . The display device as claimed in claim 1 , wherein:
the first frame period is a 2p−1th frame period, and the second frame period is a 2pth frame period.

7 . The display device as claimed in claim 1 , wherein:
the first frame period includes at least two horizontal periods; and the demultiplexer, during a first horizontal period, is to supply the image data signal to a pixel of the first pixel column and supply the image data signal to a pixel of the second pixel column after a predetermined time elapses, and during a second horizontal period is to supply the image data signal to the pixel of the second pixel column and supply the image data signal to the pixel of the first pixel column after a predetermined time elapses.

8 . The display device as claimed in claim 7 , wherein:
the first horizontal period is a 2q−1th horizontal period, and the second horizontal period is a 2qth horizontal period.

9 . The display device as claimed in claim 8 , wherein a control signal output last during the 2q−1th horizontal period is continuous with a control signal output first during the 2qth horizontal period.

10 . The display device as claimed in claim 1 , further comprising:
a data modulator to compensate for an input image data signal and to output the image data signal.

11 . The display device as claimed in claim 1 , wherein the at least one pixel includes:
a light-emitting element; a driving switching element to be controlled by a signal of a first node and connected between a second node and a third node; an initiating switching element to be controlled by an n−1th scan signal supplied from an n−1th scan line and connected between the first node and an initiating power line; a compensating switching element to be controlled by an nth scan signal supplied from an nth scan line and connected between the first node and the third node; a data switching element to be controlled by the nth scan signal supplied from the nth scan line and connected between a corresponding data line and the second node; a static power switching element to be controlled by an nth light-emission signal supplied from an nth light-emission line and connected between the second node and a first driving power line; a light-emission control switching element to be controlled by the nth light-emission signal supplied from the nth light-emission line and connected between the third node and the light emitting element; and a capacitor connected between the first driving power line and the first node.

12 . The display device as claimed in claim 1 , wherein the demultiplexer is to:
during the first frame period, simultaneously supply the image data signal to a first set of three pixel columns including the first pixel column and simultaneously supply the image data signal to a second set of three pixel columns including the second pixel column after a predetermined time elapses, and during the second frame period, simultaneously supply the image data signal to the second set of three pixel columns and simultaneously supply the image data signal to the first set of three pixel columns after a predetermined time elapses.

13 . A method for driving a display device, the method comprising:
during a first frame period, supplying an image data signal to a first pixel column, and supplying the image data signal to a second pixel column after a predetermined time elapses, through a demultiplexer; and during a second frame period, supplying the image data signal to the second pixel column, and supplying the image data signal to the first pixel column after a predetermined time elapses, through the demultiplexer.

14 . The method as claimed in claim 13 , further comprising:
supplying control signals which determine an order of driving pixel columns including the first and second pixel columns to the demultiplexer.

15 . The method as claimed in claim 13 , further comprising:
changing control signals for the first and second frame periods.

16 . The method as claimed in claim 13 , wherein:
the first frame period is a 2p−1th frame period, and a second frame period is a 2pth frame period.

17 . The method as claimed in claim 13 , wherein:
the first period includes at least two horizontal periods, and during a first horizontal period, supplying the image data signal to the first pixel column and supplying the image data signal to the second pixel column after a predetermined time elapses.

18 . The method as claimed in claim 17 , wherein, during a second horizontal period, supplying the image data signal to the second pixel column and supplying the image data signal to the first pixel column after a predetermined time elapses.

19 . The method as claimed in claim 18 , wherein:
the first horizontal period is a 2q−1th horizontal period, and the second horizontal period is a 2qth horizontal period.

20 . The method as claimed in claim 13 , further comprising:
compensating for an input image data signal, and outputting the image data signal.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Yang Wan

Classifications

• G09G2320/0204

  Compensation of DC component across the pixels in flat panels · CPC title

• G09G3/3275 Primary

  Details of drivers for data electrodes · CPC title

• G09G2320/0242

  Compensation of deficiencies in the appearance of colours · CPC title

• G09G3/3225

  using an active matrix · CPC title

• G09G2300/0452

  Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components · CPC title