Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1995-07-05
1999-03-02
Nguyen, Chanh
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 92, G09G 336
Patent
active
058777369
ABSTRACT:
A liquid crystal display device includes a drain drive circuit for driving drain signal lines of a liquid crystal display panel. The drain drive circuit receives a plurality of grey-scale reference voltages from an external circuit, interpolates a plurality of intermediate voltages between each pair of adjacent ones of the grey-scale reference voltages, selects voltages from the grey-scale reference voltages and the intermediate voltages, and applies the selected voltages to the drain signal lines. V0 is a grey-scale reference voltage corresponding to a minimum grey-scale level, Vm is a grey-scale reference voltage corresponding to a maximum grey-scale level, and Vi is a grey-scale reference voltage that is nearest to a voltage level (Vm+V0)/2. A number of intermediate voltages interpolated between V(i-1) and Vi is greater than both a number of intermediate voltages interpolated between V0 and V1, and a number of intermediate voltages interpolated between V(m-1) and Vm.
REFERENCES:
patent: 5196738 (1993-03-01), Takahara et al.
patent: 5414443 (1995-05-01), Kanatani
patent: 5623278 (1997-04-01), Okada et al.
Hasegawa Kaoru
Igarashi Youichi
Imajo Yoshihiro
Kondo Hironori
Hitachi , Ltd.
Nguyen Chanh
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