Display apparatus

Details Display apparatus Display apparatus

1990-06-20

1993-12-14

Oberley, Alvin E.

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345209, G09G 336

Patent

active

052706974

ABSTRACT:
An AC driving type of display apparatus such as a matrix type liquid crystal display apparatus, which is adapted to prohibit the application of the scanning voltage upon at least one of the row electrodes for a given period so as to switch the repetition period of the scanning voltage to be applied on at least one of the row electrodes into the integral multiple of the original repetition period. Further, it is adapted to switch the period of the polarity inversion of the driving voltage to be applied upon the picture element in accordance with the repetition period of the switched scanning voltage. Further, the complete AC driving operation may be effected, for example, even in a case where the signal voltage at the first repetition period of the scanning voltage is different from the signal voltage at the second repetition period.

REFERENCES:
patent: 4525710 (1985-06-01), Hoshi et al.
patent: 4655561 (1987-04-01), Kanbe et al.
patent: 4691200 (1987-09-01), Stephany
patent: 4693563 (1987-09-01), Harada et al.
patent: 4730140 (1988-03-01), Masubuchi
patent: 4915477 (1990-04-01), Ohta et al.
patent: 4922240 (1990-05-01), DuWaer
patent: 4926168 (1990-05-01), Yamamoto et al.

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