Real-time ultra-high resolution image projection display using l

Details Real-time ultra-high resolution image projection display using l Real-time ultra-high resolution image projection display using l

1982-12-02

1985-08-06

Corbin, John K.

350342, 350345, G02F 113

Patent

active

045332150

ABSTRACT:
A more clearly defined image is projected onto a distant screen in real-time at video rates to allow for collective analysis of rapidly changing updated data. A laser has its coherent beam modulated in accordance with the images to be viewed. The modulated light beam is scanned across the surface of a liquid crystal light valve to stimulate a photosensor layer that impresses a replica voltage pattern on the bi-refringent liquid crystal. A high intensity projection light beam is reflected from the liquid crystal via a polarizing biprism and, consequently, is modulated by the bi-refringent liquid crystal so that a corresponding image is displayed on the screen. The controllable small spot diameter of the modulated laser beam is capable of greatly improving the resolution as it scans across the liquid crystal light valve. The hybrid field effect nematic liquid crystal layer, plus a direct creation of replica voltages by the impinging modulated coherent light, gives the system an instantaneous, truly real-time capability.

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Dewey, A. G. & Crow, J. D. "The Application of GaAlAs Lasers to High-Resolution Liquid Crystal Projection Displays," IBM J. Res. Develop., vol. 26, No. 2, (Mar. 1982), pp. 177-185.
Reif, P. G. et al., "Hybrid Liquid Crystal Light Valve-Image Tube Devices for Optical Data Processing," Proc. of Soc'y Photo-Optical Instrum. Eng'rs., vol. 83, (Aug. 24-25, 1976), pp. 34-43.

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