Method for driving passive matrix OLED
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United States of America Patent
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Dec 7, 2010
Grant Date -
Dec 14, 2006
app pub date -
Jun 9, 2005
filing date -
Jun 9, 2005
priority date (Note) -
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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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