Low-power organic light emitting diode pixel circuit
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United States of America Patent
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Jun 17, 2003
Grant Date -
Jul 4, 2002
app pub date -
Jan 4, 2001
filing date -
Jan 4, 2001
priority date (Note) -
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Abstract
A pixel circuit comprises an organic light emitting diode (OLED), and a static memory for storing data that represents an operational state of the OLED. In alternative embodiments, a pixel circuit may include a complementary metal oxide semiconductor (CMOS) circuit for controlling the OLED, a protection circuit for protecting the CMOS circuit from an over-voltage condition, and a current source with a field effect transistor (FET) having a static gate to source voltage that is greater than a threshold voltage of the FET.
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