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US 8,508,442 B2Granted
Organic light emitting display device and driving method thereof
AssigneeSamsung Display Co., Ltd.
InventorYoung-Wook Yoo
Life of this patent
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Abstract
An organic light emitting display and a method of driving the display are disclosed. The display uses an automatic current limit driving method. The method includes comparing current and previous frames of data to select a peak brightness ratio for displaying the current frame. If the difference between the frames is greater than a threshold, the peak brightness ratio of the previous frame is used for the current frame.
Claims20
An organic light emitting display device, comprising:
- a pixel unit including a plurality of pixels connected with scan lines and data lines;
- a timing controller configured to supply frames of first data;
- a converter configured to receive the frames of first data, the converter comprising:
- a color coordinate converter configured to determine luminance components of the first data of each frame,
- a peak brightness ratio (PBR) generator, configured to determine a PBR for the first data of each frame, wherein the PBR is determined based on the determined luminance components, and
- a data converter configured to generate second data for each frame based on the first data for each frame and on the PBR;
- and
- a data driver configured to receive the second data from the converter and to provide the second data to the data lines.
5 more elements
A driving method of driving an organic light emitting display device, the method comprising:
- converting color coordinates of first data of a plurality of frames;
- extracting luminance information of the converted first data of successive frames;
- comparing and analyzing histogram data of the luminance information of the first data of the successive frames;
- detecting whether the number of maximum and minimum gray-scales in the luminance information for a current frame is different from the number of maximum and minimum gray-scales in the luminance information of a previous frame;
- based on a difference in the number of maximum and minimum gray-scales in the current and previous frames, determining whether flicker in the current frame is anticipated;
- and
- converting the first data of each frame to second data for each frame by applying a peak brightness ratio (PBR) value to the first data of each frame, wherein if flicker is anticipated the peak brightness ratio value is equal to a peak brightness ratio value applied to the previous video frame.
4 more elements
An organic light emitting display device, comprising:
- a pixel unit including a plurality of pixels;
- a converter configured to receive frames of first data, the converter comprising:
- a peak brightness ratio (PBR) generator configured to determine a PBR for the first data of each frame, wherein the PBR is determined based on a luminance of the first data, and
- a data converter configured to generate second data for each frame based on the first data for each frame and on a selected one of the generated PBRs;
- and
- a data driver configured to provide the second data to the pixels.
3 more elements
Dependencies are inferred from the claim text.