Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2007-07-24
2007-07-24
Lefkowitz, Sumati (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C326S062000, C327S333000, C345S061000, C345S099000, C345S100000, C345S204000
Reexamination Certificate
active
10438886
ABSTRACT:
A level shift circuit includes first and second level shifters which respectively output first and second output signals that are produced by level shifting two kinds of input clock signals whose high level periods do not overlap. The level shift circuit also includes control transistors and control lines which, together, prevent a feedthrough current from flowing into the second level shifter when the first output signal is high level, and prevent a feedthrough current from flowing into the first level shifter when the second output signal is high level, so as to suspend the level shift operation of the first and second level shifters. With the level shift circuit, power consumption during a specific time period in a non-active period of the clock signal can be eliminated, where the specific time period of one clock signal is the active period of the other clock signal.
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Korean Office Action mailed Dec. 21, 2004 (w/English translation thereof).
Gyouten Seijirou
Hayashi Shunsuke
Matsuda Eiji
Murakami Yuhichiroh
Tsujino Sachio
Beck Alexander S.
Lefkowitz Sumati
Nixon & Vanderhye PC
Sharp Kabushiki Kaisha
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