Optical display device having a memory to enhance refresh operations
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jan 30, 2007
Grant Date -
Jan 23, 2003
app pub date -
Jan 28, 2000
filing date -
Jan 28, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A method includes providing a capacitor to maintain a terminal voltage of a pixel cell near a predetermined voltage. A memory is provided to store a digital indication of the predetermined voltage, and during a refresh operation, the digital indication is converter into an analog voltage to update a charge on the capacitor. A light modulator cell includes a pixel cell, a capacitor, a memory and a digital-to-analog converter. The capacitor maintains a terminal voltage of the pixel cell near a predetermined voltage, and the memory stores a digital indication of the predetermined voltage. The digital-to-analog converter converts the digital indication into an analog voltage to update a charge on the capacitor during a refresh operation.
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