Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1993-09-14
1998-04-28
Hjerpe, Richard
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 94, G09G 336
Patent
active
057450897
ABSTRACT:
In order to realize multi-level gradation representation with reduced crosstalk in a display apparatus of STN method, one horizontal interval is divided uniformly by the bit length n of a gradation level display in a display apparatus of STN method having a display panel of simple matrix type and having display luminance depending upon the root-mean-square value of applied voltage. Each of sections resulting from division is associated with a display bit. The applied voltage value of the display panel in each divisional section is adjusted so that the root-mean-square voltage value difference on a divisional section may become the density difference meant by the display bit. Since time is divided into nearly equal n parts to represent a gradation level, the minimum time interval resulting from division becomes longer that of the conventional technique. Since the frequency band in use is narrowed, the crosstalk is reduced. As a result, false images and flicker on the display screen can be suppressed.
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Mano Hiroyuki
Nishitani Shigeyuki
Sano Koichi
Taguchi Jun'ichi
Tanaka Toshio
Hitachi , Ltd.
Hjerpe Richard
Mengistu Amare
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