Organic light emitting display device and driving method thereof
AssigneeLG Display Co., Ltd.
InventorsMunjun LEE, Hyungjung KIM
Life of this patent
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Abstract
An organic light emitting display device includes: an APL calculation unit; a current value calculation unit output a first result value or output a second result value; a peak luminance controller configured to output a first luminance control signal based on a first gamma conversion value when receiving the first result value from the current value calculation unit and output a second luminance control signal based on a second gamma conversion value when receiving the second value from the current value calculation unit; a programmable gamma unit configured to output a gamma voltage; and a data driver configured to generate a data signal and supply the generated data signal to a display panel.
Claims12
An organic light emitting display device comprising:
- an average picture level (APL) calculation unit configured to calculate an APL of an input image;
- a current value calculation unit configured to calculate a current value with respect to the APL, output a first result value when a calculated current value corresponds to a target current value, and output a second result value when the calculated current value differs from the target current value;
- a peak luminance controller configured to output a first luminance control signal based on a first gamma conversion value when the first result value from the current value calculation unit is received and output a second luminance control signal based on a second gamma conversion value when the second value from the current value calculation unit is received;
- a programmable gamma unit configured to output a gamma voltage corresponding to a luminance control signal supplied from the peak luminance controller;
- and
- a data driver configured to generate a data signal based on the gamma voltage supplied from the programmable gamma unit and supply the generated data signal to a display panel.
A method for driving an organic light emitting display device, the method comprising:
- calculating an average picture level (APL) of an input image;
- calculating a current value with respect to the APL, and determining whether the calculated current value corresponds to a target current value;
- outputting a first luminance control signal based on a first gamma conversion value corresponding to a fixed gamma when the calculate current value corresponds to the target current value, and outputting a second luminance control signal based on a first gamma conversion value corresponding to a variable gamma when the calculate current value differs from the target current value;
- and
- generating a data signal based on a gamma voltage corresponding to one of the first luminance control signal and the second luminance control signal to display an image.
Dependencies are inferred from the claim text.