Pseudo static memory cell for digital light modulator
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United States of America Patent
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-
May 4, 2004
Grant Date -
Jul 25, 2002
app pub date -
Jan 22, 2001
filing date -
Jan 22, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A digital driver formed a liquid crystal uses a pseudo static memory cell formed of two transistors to hold the charge that will be applied to the different parts of the liquid crystal. The pseudo static memory is formed of two transistors, one of which is a pass transistor which passes the digital value and then goes into a high impedance date. The other transistor is a transistor configured to use its gate capacitance to store the charge. When the charge is above a specified level, it acts like a digital one and turns on the transistor. Conversely, when the charge is below level, it acts like a digital zero, turning off the transistor.
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