Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2006-06-13
2006-06-13
Shalwala, Bipin (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S089000, C345S204000, C345S208000, C345S213000
Reexamination Certificate
active
07061460
ABSTRACT:
A liquid-crystal display is driven by pulse-width modulation. One frame of an input video signal is divided into a plurality of subframes. A first pulse signal is applied to a liquid crystal irrespective of the level of the input video signal. A pulse width of the first pulse signal corresponds to the duration of the subframe. Application of the first pulse signal only does not drive the liquid crystal. A second pulse signal is applied to the liquid crystal in accordance with the level of the input video signal so that second pulses of the second pulse signal are superimposed on the first pulses at the same polarity, to perform pulse-width modulation to the liquid crystal. An average duration P of the subframes and a response time L obtained by adding a rise time and a fall time of the liquid crystal meet the requirements P<L and P≦0.15×L.
REFERENCES:
patent: 6304239 (2001-10-01), McKnight
patent: 6570550 (2003-05-01), Handschy et al.
patent: 06(1994)-138434 (1994-05-01), None
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Renner Kenner Greive Bobak Taylor & Weber
Shalwala Bipin
Shapiro Leonid
Victor Company of Japan Ltd.
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