Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2006-02-21
2006-02-21
Wu, Xiao (Department: 2674)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C089S027120, C089S027120, C315S169300
Reexamination Certificate
active
07002537
ABSTRACT:
To provide a highly versatile device which can produce a gray-scale display by applying two-level signals to data lines. When producing an 8-level gray-scale display, a single frame (1f) is divided into a first time period T1to apply two-level signals to a liquid crystal layer in accordance with gray-scale data and a second time period T2to apply an H-level voltage to the liquid crystal layer in accordance with a threshold voltage of liquid crystal. The first time period T1is further divided into 7 sub-fields (Sf1to Sf7) in accordance with gray-scale characteristics of an electro-optical device. Either an H or L level is written in accordance with a gray level of each pixel every sub-field. Thus, the ratio of an on period or an off period of the pixel to the single time frame is controlled.
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Abdulselam Abbas
Oliff & Berridg,e PLC
Seiko Epson Corporation
Wu Xiao
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