Variable gain screen permitting off-axis viewing with image brig

Details Variable gain screen permitting off-axis viewing with image brig Variable gain screen permitting off-axis viewing with image brig

1980-09-29

1982-10-19

Hayes, Monroe H.

350125, 350126, G03B 2156

Patent

active

043547370

ABSTRACT:
The invention is a variable gain non-Lambertian screen surface (12) for employment in a visual display system. The screen surface provides constant image brightness, independent of changes in viewing angle (22). It is therefore suitable for off-axis viewing. The screen gain continuously varies from a magnitude of one to infinity at different portions on the screen surface in such a manner that the equivalent gain preceived by an off-axis viewer (16) corresponds to the viewer perceiving constant image brightness, independent of changes in the viewing angle.

REFERENCES:
patent: Re29091 (1976-12-01), DePalma et al.
patent: 2381614 (1945-08-01), Moller et al.
patent: 2934997 (1960-05-01), Harkness
patent: 3383153 (1968-05-01), Vetter
patent: 3639037 (1972-02-01), Fukushima
patent: 4068922 (1978-01-01), Dotsko

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