Transient state liquid crystal image bar for electrophotographic

Details Transient state liquid crystal image bar for electrophotographic Transient state liquid crystal image bar for electrophotographic

1984-01-19

1986-06-17

Corbin, John K.

350341, G02F 1133, G02F 1137

Patent

active

045952590

ABSTRACT:
A liquid crystal image bar for an electrophotographic printer is disclosed, having a nematic liquid crystal device with crossed polarizers configured as a single array of dot shutters that are driven by a single frequency voltage source. The image bar produces latent electrostatic image on the printer's photoconductive member one line at a time in response to receipt of digitized data signals. During the operational mode, all of the image bar shutters are energized and, in this electrically driven state, the image bar shutters are non-transmissive. The latent image is produced by selective erasure of precharged background areas on the member. For the erasure to occur, interruption of the driving voltage to selected shutters in response to the data signals cause the selected shutter to become transmissive because the liquid crystal material enters a transient state. The response time for the transmissiveness is about one millisecond. Consecutively erased spots by the same shutter requires the momentary reapplication of the driving voltage. Because the function of the image bar is relatively independent of temperature and gap thickness, it is very cost effective.

REFERENCES:
patent: 3645604 (1972-02-01), Ngo
patent: 3674341 (1972-07-01), Hedman et al.
patent: 3694053 (1972-09-01), Kahn
patent: 3697150 (1972-10-01), Wysocki
patent: 3776615 (1973-12-01), Tsukamoto et al.
patent: 3784280 (1974-01-01), Bigelow
patent: 3785721 (1974-01-01), Harsch
patent: 3787110 (1974-01-01), Berreman et al.
patent: 3821720 (1974-06-01), Greubel et al.
patent: 3837730 (1974-09-01), Hatfield
patent: 3850517 (1974-11-01), Stephany et al.
patent: 3854751 (1974-12-01), Haas et al.
patent: 3857629 (1974-12-01), Freiser
patent: 3910680 (1975-10-01), Kakeda
patent: 4009934 (1977-03-01), Goodwin et al.
patent: 4097128 (1978-06-01), Matsumoto et al.
patent: 4126382 (1978-11-01), Barzilai et al.
patent: 4386836 (1983-06-01), Aoki et al.
Sheng, "Introduction to the Plastic Continuum Theory of Liquid Crystals" Priestly et al., editor Introduction to Liquid Crystals Plenum Press New York, 1974, p. 103, 106.
Chabicousky et al., "A Matrix Liquid Crystal Color Display" Conference Record of the 1978, Biennia Display Research Conference, Cherry Hill, N.J. USA.
Lefkowitz et al., "Liquid Crystal Reflection Cell with Improved Response Times" Applied Optics vol. 19, No. 19, Oct. 1, 1980 pp. 3257-3259.
Kwon et al., Improved Liquid Crystal Response Time" Applied Optics vol. 18, No. 11, Jun. 1, 1979.
Demus, "Liquid Crystal Composition and Display Performance" Non-Emmise Electro-Optic Displays Plenum Press New York, 1926.
Article "Fast Switching Twisted Nematic Electro-Optical Shutter and Colour Filter" in the Electronics Letters, vol. 10, No. 7, 4/4/74, pp. 114 and 115.
Article "A LC/CRT Filed-Sequential Color Display" by R. Vatni et al.; Society for Information Display (SID) Digit of Technical Papers May 1983, pp. 28 and 29..
Article "A Liquid Crystal Optical Switching Devices (-Cell)" by P. J. Bos et al., Society for Information Display (SID), Digest of Technical Papers, May 1983, pp. 30 and 31.

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