Liquid crystal print bar having a single backplane electrode

Recorders – Record receiver deforming

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350331R, 350334, 346160, 355 80, 355133, G02F 113

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active

048304689

ABSTRACT:
A linear array of liquid crystal shutters mounted near a photoreceptor surface and arranged transversely to the direction of travel of the photoreceptor surface, an array of multiplexed thin film transistors (TFT's) connected to the array of liquid crystal shutters for electrically driving the shutters and logic means connected to the multiplexed array of thin film resistors selectively pulsing the liquid crystal shutters to selectively expose the photoreceptor surface a line at a time. The system further includes a single backplane and circuit means for producing an electric field between the backplane and electrodes of each of the liquid crystal shutters to prevent passage of light through the shutters and means for selectively de-energizing each of the pairs of electrodes for predetermined time period in response to the receipt of input data signals.

REFERENCES:
patent: 3936172 (1976-02-01), McVeigh
patent: 4385292 (1983-05-01), Nonomura et al.
patent: 4386352 (1983-05-01), Nonomura et al.
patent: 4403217 (1983-09-01), Becker et al.
patent: 4545672 (1972-10-01), Ozawa
patent: 4595259 (1986-06-01), Perregaux
patent: 4653859 (1987-03-01), Masaki
patent: 4728972 (1988-03-01), Stephany et al.
SID '85 Digest, pp. 373-376, dated May 1985, title: "Print Head with Ferroelectric Liquid: Crystal Light-Shutter Array".
SID '86 Digest, pp. 263-265 by G-H Mode, title: "Development of High Speed and High-Resolution Liquid-Crystal Shutter (LCS) for Printers Based on Dual Frequency".
Technology dated May 1986-article title: "How Liquid Crystal Shutters are Used for Light Control in Non-Impact Printers".

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