Emission control in aged active matrix OLED display using voltage ratio or current ratio with temperature compensation
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United States of America Patent
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Dec 13, 2011
Grant Date -
Sep 25, 2008
app pub date -
Mar 18, 2008
filing date -
Mar 20, 2007
priority date (Note) -
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Abstract
Compensation needed to be made for reduced light efficiency in aged sub-pixels of an active matrix organic light-emitting diode (OLED) display are determined using a current ratio or a voltage ratio pertaining to an aged sub-pixel relative to un-aged, reference sub-pixels. When the current through the sub-pixels or the voltage across the sub-pixels are measured to determine the age of the sub-pixels, correction is made to the measured current or voltage to account for variations in the ambient temperature in which the OLED display is placed.
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