Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2006-11-21
2006-11-21
Hjerpe, Richard (Department: 2674)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S089000
Reexamination Certificate
active
07138975
ABSTRACT:
A display device which can operate at low power consumption is provided. When multi gray scale display is conducted and when display in which the number of gray scales is reduced is conducted, signal line driver circuits having different structures (first signal line driver circuit and second signal line driver circuit) are provided according to the respective cases. Those signal line driver circuits are separately used to conduct the display. The signal line driver circuit having the structure according to the number of gray scales to be represented is used to conduct the display. Thus, redundant power consumption can be prevented in the display device. Further, a decoder is used as a scanning line driver circuit and pixel rows are selected in an arbitrary order. Therefore, a region displayed by the first signal line driver circuit or a region displayed by the second signal line driver circuit can be set in a frame. Accordingly, a region for which the multi gray scale display is required and a region for which the display in which the number of gray scales is reduced is sufficient are selected in one frame so that power consumption can be effectively reduced.
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Fatahi-Yar M.
Hjerpe Richard
Semiconductor Energy Laboratory Co,. Ltd.
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