Ferroelectric Liquid Crystal Shutters For Half-Tone Recording

Shigeo Sugihara; Yuji Ooba

doi:10.1117/12.976409

25 July 1989 Ferroelectric Liquid Crystal Shutters For Half-Tone Recording

Shigeo Sugihara, Yuji Ooba

Proceedings Volume 1080, Liquid Crystal Chemistry, Physics, and Applications; (1989) https://doi.org/10.1117/12.976409
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

Ferroelectric liquid-crystal (FLC) light-shutter arrays for half-tone recording are studied. The shutter arrays differ from traditional LC arrays in that they have three terminals in every shutter cell. The shutters perform a stopping action with a curtain-like diaphragm when appropriate signals are applied to the three terminals. The diaphragm area is varied by controlling one of the three signals. This function is applied to a printing head recording half-tone images by dot area modulation. A 105-step gray scale is recorded with this shutter array. This system enables half-tone recording without a drop in resolution (unlike the dither method) or recording speed. Only one signal line every unit shutter is proposed for this shutter array, for recording resolution as good as that of a binary printing head.

Citation Download Citation

Shigeo Sugihara and Yuji Ooba "Ferroelectric Liquid Crystal Shutters For Half-Tone Recording", Proc. SPIE 1080, Liquid Crystal Chemistry, Physics, and Applications, (25 July 1989); https://doi.org/10.1117/12.976409

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