Active matrix display device
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United States of America Patent
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-
Jan 13, 2009
Grant Date -
Nov 25, 2004
app pub date -
May 21, 2004
filing date -
Mar 2, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A display has circuitry (50) which generates all possible pixel drive signal levels on separate signal level lines. A buffer (54) is associated with each signal level line. The outputs of the buffers are selectably switchable onto the columns. The signal levels for each column are stored in a memory (72) and the buffers are controlled in dependence on the stored signal levels. The response of the buffers is heavily dependent on the output load, and there is a very large variation in the output load of the buffers (54), as a function of the number of columns to which the buffer output is to be provided. The buffers are controlled in dependence on stored signal levels to ensure stability of the buffers for any output load.
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