Patent ID: 8988470
Filing Date: 2015-03-24
Classification: G09G

Abstract:
1. A luminance correction system for organic light emitting diode (OLED) displays, the system comprising: an image analyzing unit configured to analyze an image displayed by a pixel unit of each of the OLED displays and measure the luminance and color coordinate for a main gray level, the image analyzing unit comprising: a main-gamma offset generating unit configured to: a driving voltage sensing unit configured to sense a change in voltage of a driving power signal input from an external source of each of the OLED displays; a sub-gamma offset generating unit configured to receive the sensed change in voltage from the driving voltage sensing unit, and to generate a sub-gamma offset value for each color data in the main gray level based on the received sensed change in voltage of the sensed driving power signal; a gamma voltage adjusting unit configured to adjust the main-gamma voltage for the main gray level corresponding to the set main-gamma offset value and the sub-gamma offset value, wherein the gamma voltage adjusting unit is further configured to output the adjusted main-gamma voltage; and a gamma voltage applying unit configured to apply the main-gamma voltage adjusted by the gamma voltage adjusting unit to a data driver of each of the OLED displays.