Display system comprising a transparent emissive screen

Details Display system comprising a transparent emissive screen Display system comprising a transparent emissive screen

1985-11-04

1989-02-28

Caldwell, Sr., John W.

Communications: electrical

Land vehicle alarms or indicators

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

340980, 350407, 350399, G02B 2300

Patent

active

048089788

ABSTRACT:
A device for weakening the incident light passing through a transparent emissive display system so as not to drown the emitted light is disclosed which utilizes two polarizing filters one at least of which is placed before the screen so as to selectively attenuate the incident light. A photoelectric cell measures this incident light and controls a motor which rotates one of the filters so as to adjust the attenuation to the initial intensity.

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IBM Technical Disclosure Bulletin, vol. 12, No. 5, Oct. 1969, p. 692, New York, U.S.; L. T. Lemke: "Intensity Control System Using Crossed Linear Polarizers".

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