Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1997-05-15
2000-05-02
Hjerpe, Richard A.
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 98, 345 99, 345100, 345 96, G09G 336
Patent
active
060578211
ABSTRACT:
A passive liquid crystal device (FIG. 1) is driven in a multiplexed manner by a strobe signal (STB) applied in succession to a plurality of row electrodes and data signals (DATa, DATb) applied to a plurality of column electrodes. A resultant signal (RESa, RESb) comprising the combination of the strobe and data signals is applied to the pixels in the device. The liquid crystal device is sensitive to the polarity of the resultant signal. Typically a blanking pulse of a first polarity is applied followed by a resultant signal of the opposite polarity. A first data signal (DATa) is intended to change the state of the relevant pixel (SELECT) while a second data signal (DATa) is intended to leave the pixel in the same state (NON-SELECT). According to the invention the resultant signal (RESa, RESb) comprises at least a portion which is substantially continuously varying. This can be achieved by either or both of the strobe and data signals including such a portion or portions. The invention may provide improved performance of the device through maximisation of the torque applied to the molecules of the liquid crystal during the switching process in response to a SELECT resultant (RESa). The invention is particularly applicable to ferroelectric liquid crystal devices (FLCDs).
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Hughes Jonathan Rennie
Jones John Clifford
Scattergood David Charles
Hjerpe Richard A.
Sharp Kabushiki Kaisha
The Secretary of State for Defense in Her Britannic Majesty's Go
Tran Henry N.
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