Display Device and Driving Method Thereof

• US 20100053039A1
• Filed: 08/25/2009
• Published: 03/04/2010
• Est. Priority Date: 09/01/2008
• Status: Abandoned Application

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Shin, Kwang-Sub, Park, Jong-Hwa, Sung, Si-Duk, Koh, Byung-Sik
• Application Number:
  US12/547,154
• Publication Number:
  US 20100053039A1
• Time in Patent Office: Days
• US Class Current: 345/76
• CPC Class Codes: G09G 2320/046 Dealing with screen burn-in prevention or compensation of the effects thereof
• CPC Class Codes: G09G 2320/103 Detection of image changes, e.g. determination of an index representative of the image change
• CPC Class Codes: G09G 2360/18 Use of a frame buffer in a display terminal, inclusive of the display panel
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: G09G 3/3275 Details of drivers for data electrodes
• CPC Class Codes: Y02E 10/549 Organic PV cells

Abstract

A display device includes a plurality of pixels respectively including a plurality of light-emitting elements, a comparing unit for comparing input image signals during a plurality of continuous frames for each pixel and determining whether the input image signals are repeated, a signal converter for converting the input image signal into a compensating image signal for the pixel where the input image signals are repeated during the continuous frames, and a data driver generating a data signal corresponding to the compensation image signal to supply the data signal to the pixel.

Claims

1. A display device comprising:

a plurality of pixels respectively comprising a plurality of light-emitting elements;

a comparing unit comparing input image signals during a plurality of continuous frames for each pixel, and determining whether the input image signals are repeated;

a signal converter converting the input image signal into a compensating image signal for a pixel where the input image signals are repeated during the continuous frames; and

a data driver generating a data signal corresponding to the compensation image signal and supplying the data signal to the pixel.

2. The display device of claim 1, wherein:

the compensation image signal comprises a black data that is periodically input to the input image signal.

3. The display device of claim 2, wherein:

the compensation image signal inputs the input image signal after the input of the black data.

4. The display device of claim 1, wherein:

the comparing unit comprises a plurality of first memories and second memories, wherein

the first memories respectively store the input image signal of one frame for all pixels, and

the second memories store location information and the input image signals of the pixel where the input image signals are repeated.

5. The display device of claim 4, wherein:

the location information and the repeated input image signals of the pixel are supplied from the second memory to the signal converter.

6. The display device of claim 4, wherein:

the compensation image signal comprises a black data that is periodically input to the input image signal.

7. The display device of claim 1, wherein:

the comparing unit transmits the input image signal of the pixel where the input image signals are different during the continuous frames to the data driver.

15. The display device of claim 1, wherein the light emitting elements are organic light emitting diodes.

8. A method for driving a display device comprising a plurality of pixels respectively comprising a plurality of light-emitting elements comprising:

storing input image signals for the pixels during a plurality of frames;

determining whether the input image signals are repeated by comparing the stored input image signals for each pixel;

generating a compensation image signal for the pixel where the input image signals are repeated during a plurality of continuous frames; and

generating a data signal corresponding to the compensation image signal and supplying the data signal to the pixel.

9. The method of claim 8, wherein:

generating the compensation image signal comprises periodically inputting a black data signal to the input image signal.

10. The method of claim 9, further comprising, after inputting the black data signal:

inputting the input image signal.

11. The method of claim 8, further comprising:

storing a location information and the input image signal of the repeated portion of pixels.

12. The method of claim 8, further comprising:

generating a data signal corresponding to the input image signal and supplying the data signal to the pixel where the input image signals are different during the continuous frames.

16. The method of claim 8, wherein the light emitting elements are organic light emitting diodes.

13. A display device, comprising:

a plurality of pixels for displaying images,

wherein, if image signals are repeated for a portion of pixels of the pixels during a plurality of frames,

a black data signal is periodically input to the portion of pixels after the image signal, and a normal image signal is input to the remaining pixels.

14. The display device of claim 13, wherein:

the portion of pixels is supplied with a normal image signal after being periodically supplied with the black data signal.

17. The display device of claim 13, wherein the pixels comprise organic light emitting diodes.