Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1994-11-30
1996-08-13
Hjerpe, Richard
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345121, 345133, G09G 534
Patent
active
055461042
ABSTRACT:
A memory is provided for storing one field of video signals supplied to a liquid crystal display panel serving as a display portion. Whether the video signals to be displayed have a stationary image portion or a moving image portion is determined by a comparator by comparing the video signals of the last field read out from the memory and the video signals of the present field supplied to the liquid crystal display panel. When it is determined that the video signals have a stationary image portion, the speed of scanning by a driver is reduced. When the scanning speed is low, the power required for the scanning is reduced.
REFERENCES:
patent: 4469449 (1984-09-01), Kato
patent: 4774506 (1988-09-01), Bossoutrout
patent: 4860246 (1989-08-01), Inoue
patent: 5025394 (1991-06-01), Parke
patent: 5113493 (1992-05-01), Crosby
Patent Abstracts of Japan, vol. 14, No. 568 (E-1014), Dec. 18, 1990 & JP-A-02 249 481.
Patent Abstracts of Japan, vol. 14, No. 573 (E-1015), Dec. 19, 1990 & JP-A-02 249 377.
Chang Kent
Hjerpe Richard
Rohm & Co., Ltd.
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