PWM precharge of organic light emitting diodes
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United States of America Patent
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Issued Date -
Sep 22, 2011
app pub date -
Jun 23, 2010
filing date -
May 19, 2010
priority date (Note) -
Abandoned
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Abstract
Methods for PWM precharging of organic light emitting diodes (OLEDs) have been disclosed. Image quality has been improved by including the light generated during pre-charge phase is included in the overall budget. The approach invented is especially beneficial to displays using Multi-Line Algorithms (MLA). Constant discharge time for anodes, discharging the anodes to just below the luminance level saves power by reducing the pre-charge requirements for the next driving phase. High impedance terminal (HiZ) discharge is performed after a fixed discharge of anodes.
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