Organic light emitting display and method of driving the same

• US 8,896,504 B2
• Filed: 05/20/2010
• Issued: 11/25/2014
• Est. Priority Date: 08/03/2009
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Park, Sung-Un, Park, Sung-Cheon, Lee, Wook
• Primary Examiner(s): Karimi, Pegeman
• Application Number:
  US12/784,457
• Publication Number:
  US 20110025670A1
• Time in Patent Office: 1,650 Days
• Field of Search: 345/36, 345/39, 345/45, 345/46, 345 76- 80, 345/82, 345/83, 345/89, 345/98, 345/211, 3151691-1693
• US Class Current: 345/76
• CPC Class Codes: G09G 2310/0297 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 Class Codes: G09G 2330/022 in absence of operation, e.g. no data being entered during a predetermined time
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element

Abstract

An organic light emitting display capable of reducing power consumption in a standby mode to increase the use time of a battery and a method of driving the same. The organic light emitting display includes a pixel unit for displaying an image by utilizing a plurality of frames and in accordance with data signals and scan signals; a data driver for outputting the data signals; a scan driver for outputting the scan signals; and a controller for controlling the data driver and the scan driver so that, in at least one frame of the plurality of frames, the scan signals are not transmitted to the pixel unit.

Claims

1. An organic light emitting display, comprising:

a pixel unit for displaying an image by utilizing a plurality of frames and in accordance with data signals and scan signals, the pixel unit having a first display region and a second display region;

a data driver for outputting the data signals;

a scan driver for outputting the scan signals; and

a controller for controlling the data driver and the scan driver so that, in at least one entire frame of the plurality of frames, data signals stored in the pixel unit during a previous frame of the plurality of frames are used to display the image in the second display region while the scan driver does not transmit any of the scan signals to the pixel unit.

2. The organic light emitting display as claimed in claim 1, wherein the scan driver is stopped from being driven to output the scan signals by the controller during the at least one entire frame when the scan signals are not transmitted.

3. The organic light emitting display as claimed in claim 1, further comprising a demultiplexer between the data driver and the pixel unit to distribute a plurality of data signals output from one output end of the data driver during a frame period of at least an other frame of the plurality of frames.

4. The organic light emitting display as claimed in claim 3, wherein an operation of the demultiplexer stops in the at least one entire frame when the scan signals are not transmitted to the pixel unit.

5. The organic light emitting display as claimed in claim 1, wherein the image is displayed only in the second display region of the pixel unit.

6. The organic light emitting display as claimed in claim 1, wherein the image is a standby image.

7. A method of driving an organic light emitting display for displaying an image by utilizing a plurality of frames and in accordance with data signals and scan signals, comprising:

transmitting the data signals to pixels of a pixel unit of the organic light emitting display by the scan signals to display a first image of a first frame of the plurality of frames, the pixel unit having a first display region and a second display region; and

maintaining the data signals transmitted in the first frame in the pixels to display a second image of a second frame of the plurality of frames without transmitting any of the scan signals to the pixels during an entire duration of the second frame, wherein the first image and the second image are same images.

8. The method as claimed in claim 7, wherein the first and second images are displayed only on the second display region of the pixel unit.

9. The method as claimed in claim 8, wherein the first and second images are a standby image.

10. The method as claimed in claim 7, wherein the second frame is an adjacent frame following the first frame.

11. An organic light emitting display, comprising:

a pixel unit for displaying an image by utilizing a plurality of frames and in accordance with data signals and scan signals, the pixel unit having a first display region and a second display region;

a data driver for outputting the data signals;

a scan driver for outputting the scan signals; and

a controller configured to control the data driver and the scan driver to transmit the data signals to the pixel unit in a first frame of the plurality of frames to display a first image in the second display region, and to display the first image in the second display region using data signals stored in the pixel unit during a second frame while the scan driver does not transmit any of the scan signals during an entire duration of the second frame of the plurality of frames.

12. The organic light emitting display as claimed in claim 11, wherein, in the second frame, the pixel unit is adapted to maintain the data signals transmitted in the first frame to display a second image of the second frame.

13. The organic light emitting display as claimed in claim 12, wherein the data driver is configured to not transmit the data signals in the second frame.

14. The organic light emitting display as claimed in claim 12, wherein the first and second images are displayed only in the second display region of the pixel unit.

15. The organic light emitting display as claimed in claim 12, wherein the first and second images are a standby image.

16. The organic light emitting display as claimed in claim 12, wherein the second frame is an adjacent frame following the first frame.

17. The organic light emitting display as claimed in claim 11, wherein the first image is displayed only in the second display region of the pixel unit.

18. The organic light emitting display as claimed in claim 11, wherein the first image is a standby image.