Liquid crystal display apparatus and method of driving same

Details Liquid crystal display apparatus and method of driving same Liquid crystal display apparatus and method of driving same

1990-02-23

1993-02-02

Brier, Jeffery A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340805, 359 55, G09G 336

Patent

active

051841185

ABSTRACT:
A liquid crystal display apparatus applying scanning voltage waveforms to a plurality of scanning electrodes and signal voltage waveforms to a plurality of signal electrodes and periodically inverting the polarity of the voltage difference between the electrodes. In providing a display having even contrast, the scanning voltage waveforms applied to the scanning electrodes and/or the signal voltage waveforms applied to the signal electrodes are changed immediately after the polarity of the voltage difference is inverted.

REFERENCES:
patent: 4485380 (1984-11-01), Soneda et al.
patent: 4710768 (1987-12-01), Takeda et al.
patent: 4845482 (1989-07-01), Howard et al.
patent: 4864290 (1989-09-01), Waters
patent: 5010326 (1991-04-01), Yamazaki

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