Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Shang-Li Chen0
Date of Patent
December 7, 2010
0Patent Application Number
111601050
Date Filed
June 9, 2005
0Patent Primary Examiner
Patent abstract
A method for driving a passive matrix organic light emitting diode (PMOLED) is provided. A pulse width modulation (PWM) constant current is provided to OLED pixels connected to a segment of a PMOLED array without voltage pre-charging the segment. Then, an offset value corresponding to missing gray scales of the OLED pixel is determined. According to the missing gray scales, the gray scales of the OLED pixel are rescaled starting from the offset. The OLED pixel is thus driven by a compensated PWM constant current having the rescaled gray scales during each horizontal line period.
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