Charge modulation compensated liquid crystal light valve having

Details Charge modulation compensated liquid crystal light valve having Charge modulation compensated liquid crystal light valve having

1987-05-05

1990-04-17

Miller, Stanley D.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340720, 315365, 358242, G02F 113, G09G 106

Patent

active

049174630

ABSTRACT:
A liquid crystal light valve (10) includes compensation for wire shadow effects caused by the interception of writing beam primary electrons as they propagate through the collector electrode (66). The wire shadows stem from the lack of charge deposited on target surface regions ( 106) intended to be addressed by the writing electron beam (60a). The present invention applies to the collector electrode an appropriate voltage that diverts the paths (112) of nonintercepted writing beam electrons toward target surface regions directly below the collector electrode portions that intercepted the writing beam electrons. Diverting the paths of nonintercepted electrons provides a more uniform charge distribution on the target surface (45) and thereby fills the charge voids created by the electron intercepting portions of the collector electrode.

REFERENCES:
patent: 2964672 (1959-07-01), Nixon
patent: 3627408 (1971-12-01), Fergason
patent: 3774066 (1973-11-01), Kazan
patent: 4119367 (1978-10-01), Raynes et al.
Kazan et al., Electronic Image Storage, Academic Press, 1968, pp. 132 & 307-312.
Haven, "Electron-Beam Addressed Liquid-Crystal Light Valve", IEEE Trans. on Elec. Dev., vol. ED-30, No. 5, May, 1983.
Milman et al., Electronic Devices and Circuits, pp. 158-161, McGraw Hill, 1967.

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