Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1995-01-05
1998-07-21
Hjerpe, Richard
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 95, 345 92, 345208, G09G 336
Patent
active
057840423
ABSTRACT:
An active matrix liquid crystal display device having a redundancy structure implemented by forming loops of drain lines by connecting two or more abutted drain lines, and providing sampling transistors on both sides of the display panel thereof or the like, so as to be able to deal with short circuits in drain lines and defects in driving TFTs occurring during manufacture, thereby providing an improved quality of display which will not deteriorate even if defects occur, thus preventing the loss of function in a display device. The drive signals for the sampling transistors which control signals to be applied to respective drain lines in a drive circuit for driving liquid crystal elements are reversed in polarity for every frame in order to suppress the occurrence of flicker or the like in the display screen so as to attain a clean, clear and high-quality screen display.
REFERENCES:
patent: 4909602 (1990-03-01), Kaneko et al.
patent: 4955697 (1990-09-01), Tsukada et al.
patent: 5034735 (1991-07-01), Inoue et al.
patent: 5182549 (1993-01-01), Taniguchi et al.
patent: 5252954 (1993-10-01), Nagata et al.
Konishi Nobutake
Ono Kikuo
Hitachi , Ltd.
Hjerpe Richard
Lao Lun-Yi
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