Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2007-02-06
2007-02-06
Lefkowitz, Sumati (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
Reexamination Certificate
active
10450347
ABSTRACT:
An object of the present invention is to suppress a picture defect such as a vertical streak, a ghost or the like on an active matrix display apparatus of a divided sample and hold type.A horizontal driving circuit (17) sequentially generates sampling pulses of which sampling pulses supplied to sampling switches (23) connected to an identical video line (25) do not overlap each other and sampling pulses supplied to adjacent sampling switches (23) overlap each other, and drives the switches, whereby a video signal is sequentially written to pixels (11). A clock generating circuit (18) generates a clock signal HCK serving as a basis for operation of the horizontal driving circuit (17), and a clock signal2HCK having twice a cycle of the clock signal HCK and twice a pulse width of the clock signal HCK. The horizontal driving circuit (17) includes: a shift register (21) for performing shift operation in synchronism with the clock signal HCK and sequentially outputting shift pulses; and an extracting switch group (22) for extracting the clock signal2HCK in response to the shift pulses, and sequentially generating the sampling pulses.
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Uchino Katsuhide
Yamashita Jun-ichi
Depke Robert J.
Kumar Srilakshmi K
Lefkowitz Sumati
Rockey, Depke, Lyons & Kitzinger LLC
Sony Corporation
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