Organic light emitting display device and method for driving the same

Patent metadata

Field	Value
Publication number	US-9934721-B2
Application number	US-201414341704-A
Country	US
Kind code	B2
Filing date	Jul 25, 2014
Priority date	Mar 10, 2014
Publication date	Apr 3, 2018
Grant date	Apr 3, 2018

Abstract

Provided is an organic light emitting display device including: a display unit having a first display region and a second display region, and comprising a plurality of pixels; and a controller configured to calculate an OPR (On Pixel Ratio) of the plurality of pixels from video data input from an outside, and to generate corrected video data for decreasing driving current of the plurality of pixels based on the OPR, the OPR including a first OPR that corresponds to the first display region and a second OPR that corresponds to the second display region.

First claim

What is claimed is:

1. An organic light emitting display device comprising:
a display unit having a first display region and a second display region, and comprising a plurality of pixels; and
a controller configured to calculate an OPR (On Pixel Ratio) of the plurality of pixels from video data input from an outside, and to generate corrected video data for decreasing driving current of the plurality of pixels for each of the first display region and the second display region based on the OPR,
the OPR comprising a first OPR that corresponds to the first display region and a second OPR that corresponds to the second display region,
wherein the OPR is a ratio of the number of pixels that are activated in an on state to the total number of pixels based on one frame, and
wherein the controller is configured to correct the video data that corresponds to the first display region utilizing a first corrected luminance value calculated according to the first OPR, and to correct the video data that corresponds to the second display region utilizing a second corrected luminance value calculated according to the second OPR.

2. The organic light emitting display device of claim 1 , wherein the controller is configured to calculate a third OPR that is an average value between the first OPR and the second OPR, and to correct the video data that corresponds to a third display region that is a boundary region between the first display region and the second display region utilizing a third corrected luminance value calculated according to the third OPR.

3. The organic light emitting display device of claim 1 , wherein the controller is configured to calculate a third OPR that is an average value between the first OPR and the second OPR, to calculate a third corrected luminance value based on the third OPR and to correct the video data that corresponds to the first display region and the second display region utilizing the third corrected luminance value.

4. The organic light emitting display device of claim 1 , wherein the controller is configured to correct the video data that corresponds to the first display region and the second display region utilizing a first corrected luminance value calculated according to the first OPR.

5. The organic light emitting display device of claim 1 , wherein the controller is configured to correct the video data that corresponds to the first display region utilizing a first corrected luminance value calculated according to the first OPR.

6. The organic light emitting display device of claim 1 , wherein the controller is configured to correct the video data that corresponds to the second display region utilizing a second corrected luminance value calculated according to the second OPR.

7. The organic light emitting display device of claim 1 , wherein the second display region extends from at least one side of the display region, and is bent with a curvature or is bent based on a boundary surface between the first display region and the second display region.

8. The organic light emitting display device of claim 1 , wherein the controller is configured to generate the corrected video data from the video data when a gradation level of the video data is equal to or higher than a reference gradation level.

9. The organic light emitting display device of claim 1 , wherein the controller comprises:
a data converter configured to convert the video data into the corrected video data, the data converter comprising an OPR calculator configured to calculate the first OPR and the second OPR that respectively correspond to the first display region and the second display region from the video data;
a corrected luminance value calculator configured to calculate a first corrected luminance value and a second corrected luminance value based on the first OPR and the second OPR, respectively; and
a corrected video data generator configured to correct the video data to the corrected data utilizing the first corrected luminance value and the second corrected luminance value.

10. The organic light emitting display device of claim 1 , wherein the controller is configured to calculate the OPR from the video data of a current frame, and to correct the video data of the current frame or the video data of a next frame based on the OPR.

11. A method for driving an organic light emitting display device comprising a display unit having a first display region and a second display region, and comprising a plurality of pixels, the method comprising:
generating an OPR (On Pixel Ratio) of the plurality of pixels from video data input from an outside, the OPR comprising a first OPR that corresponds to the first display region and a second OPR that corresponds to the second display region; and
generating corrected video data for decreasing driving current of the plurality of pixels based on the OPR for each of the first display region and the second display region,
wherein the OPR is a ratio of the number of pixels that are activated in an on state to the total number of pixels based on one frame, and
wherein the generating of the corrected video data comprises correcting the video data that corresponds to the first display region utilizing a first corrected luminance value calculated according to the first OPR, and correcting the video data that corresponds to the second display region utilizing a second corrected luminance value calculated according to the second OPR to generate the corrected video data.

12. The method of claim 11 , wherein the generating of the corrected video data comprises:
calculating a corrected luminance value based on the OPR; and
correcting the video data to the corrected video data utilizing the corrected luminance value.

13. The method of claim 11 , wherein the generating of the OPR comprises calculating a third OPR that is an average value between the first OPR and the second OPR,
and wherein the generating of the corrected video data comprises correcting the video data that corresponds to a third display region that is a boundary region between the first display region and the second display region utilizing a third corrected luminance value calculated according to the third OPR to generate the corrected video data.

14. The method of claim 11 , wherein the generating of the OPR comprises calculating a third OPR that is an average value between the first OPR and the second OPR,
and wherein the generating of the corrected video data comprises correcting the video data that corresponds to the first display region and the second display region utilizing a third corrected luminance value calculated according to the third OPR to generate the corrected video data.

15. The method of claim 11 , wherein the generating of the corrected video data comprises correcting the video data that corresponds to the first display region and the second display region utilizing a first corrected luminance value calculated according to the first OPR to generate the corrected video data.

16. The method of claim 11 , wherein the generating of the corrected video data comprises correcting the video data that corresponds to the first display region utilizing a first corrected luminance value calculated according to the first OPR to generate the corrected video data.

17. The method of claim 11 , wherein the generating of the corrected video data comprises correcting the video data that corresponds to the second display region utilizing a second corrected luminance value calculated according to the second OPR to generate the corrected video data.

18. The method of clai

Assignees

• Samsung Display Co Ltd

Inventors

• An Bo Young
• Maeng Ho Suk

Classifications

• G09G2330/021

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

• G09G2320/0271

  Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping · CPC title

• G09G2310/0283

  Arrangement of drivers for different directions of scanning · CPC title

• G09G2360/16

  Calculation or use of calculated indices related to luminance levels in display data · CPC title

• G09G3/3225

  using an active matrix · CPC title