Rear projection image display device

Optical: systems and elements – Projection screen – Rear projection screen

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Details

359443, 359452, 359457, G03B 2160

Patent

active

056754353

ABSTRACT:
A rear-projection image display device comprising a light source, a display element for visual images, a projection lens and a screen for viewing visual images projected on the screen from the rear, wherein the ratio d/a between the diameter d of the exit pupil of the projection lens and the projection distance a is 0.06 or less, said screen whereon visual images are displayed includes at least two diffusion elements, and light-diffusing fine particles are dispersed in one of the two diffusion elements which is closest to the viewer.

REFERENCES:
patent: 4206969 (1980-06-01), Cobb et al.
patent: 5066099 (1991-11-01), Yoshida et al.

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