Recording and waveform forming apparatus

Details Recording and waveform forming apparatus Recording and waveform forming apparatus

1987-04-30

1988-01-19

Evans, Arthur G.

Recorders

Printing, dotting, or punching marker

Ink transfer support or moving means

350332, 346154, G02F 113

Patent

active

047207175

ABSTRACT:
A waveform forming device comprises a light source, a liquid crystal light shutter for passing or preventing the light of the light source and a driving circuit for driving a plurality of electrodes of the liquid crystal light shutter by using drive control signals including a signal of a high frequency f.sub.H and a signal of a low frequency f.sub.L. The frequencies f.sub.H and f.sub.L are respectively higher and lower than the frequency which makes a liquid crystal dielectric anisotropy zero. The waveform forming device has a ROM in which a plurality of basic control signals are stored, a counter for addressing a desired memory areas of the ROM and a waveform selector for selecting the basic control signals. The drive control signals are formed by combining the basic control signals, thereby to provide a desired drive pattern signal.

REFERENCES:
patent: 4386836 (1983-06-01), Aoki et al.
patent: 4496214 (1985-01-01), Altman

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