Computer graphics processing and selective visual display system – Plural physical display element control system – Segmented display elements
Patent
1996-08-16
1999-03-02
Saras, Steven J.
Computer graphics processing and selective visual display system
Plural physical display element control system
Segmented display elements
345 4, 345 33, 345 50, 345 51, 4551582, 4551584, 4551585, G09G 500, G09G 304, G09G 318, H04B 118
Patent
active
058777334
ABSTRACT:
The invention is directed to simultaneously implement display by using the first and second liquid crystal display sections. While a voltage (1/2 V.sub.L) which is a half of a drive voltage V.sub.L supplied from the second drive power supply by the second liquid crystal driver is taken as a virtual ground, a voltage (1/4 V.sub.L) resulting from positively and negatively dividing by 4 the drive voltage V.sub.L is applied to each of electrodes of the second liquid crystal display section defined in the liquid crystal display panel. In a selected waveform, by applying a voltage which exceeds the saturation voltage of liquid crystals, to selected portions of the waveform, the liquid crystals are turned on. In a non-selected waveform, such a voltage is not applied. In the second liquid crystal display section, direct current component of the waveform of a signal supplied by the second liquid crystal driver is cut off by the direct current cutoff circuit. A bias voltage (1/2 V.sub.H) generated by the bias circuit is added to an output with the direct current component cut off. The resulting signal is applied to each of electrodes of the second liquid crystal display section.
REFERENCES:
patent: 5001468 (1991-03-01), Brice et al.
patent: 5189632 (1993-02-01), Paajanen et al.
patent: 5214792 (1993-05-01), Alwadish
patent: 5218352 (1993-06-01), Endoh et al.
patent: 5497372 (1996-03-01), Nankoh et al.
patent: 5584051 (1996-12-01), Goken
Hino Terufumi
Uchida Shigeru
Lewis David L
Saras Steven J.
Sharp Kabushiki Kaisha
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