Phase modulation technique for driving RMS responding liquid cry

Details Phase modulation technique for driving RMS responding liquid cry Phase modulation technique for driving RMS responding liquid cry

1995-08-23

1998-03-10

Nguyen, Chanh

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345 53, G09G 336

Patent

active

057266743

ABSTRACT:
A passive matrix liquid crystal display and a method of driving the same are provided. A desired RMS voltage to be achieved during a first frame is determined for each pixel element of the display. A modulation coefficient is determined for each pixel element as a function of the desired RMS voltage for the pixel element during the first frame. For each cycle of the frame, a phase delay is determined for each column drive waveform as a function of the sum, over all rows, of the product of each modulation coefficient of a pixel element in the column and the phase delay of the corresponding row drive waveform during the cycle.

REFERENCES:
patent: 4427978 (1984-01-01), Williams
patent: 4724433 (1988-02-01), Inoue et al.
patent: 4810059 (1989-03-01), Kuijk
patent: 5379050 (1995-01-01), Annis et al.
patent: 5459495 (1995-10-01), Scheffer et al.

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