Image projector system

Details Image projector system Image projector system

1994-02-01

1995-01-03

Cuchlinski, Jr., William A.

Optics: image projectors

Composite projected image

Reflector between lamp and screen

353 38, 353 99, 359 49, G03B 2100

Patent

active

053790804

ABSTRACT:
Parallel rays of light emitted from a light source are reflected at an angle of approximately 90.degree. by a first reflecting mirror toward a liquid crystal panel. The light reflected from the first reflecting mirror is applied to the pixels of the liquid crystal panel through a light guide lens. An image formed on the liquid crystal panel is projected on a second reflecting mirror through an auxiliary projection lens. The second reflecting mirror has a concave surface formed on the lower end portion thereof such that the concave surface gradually changes into a flat surface toward the upper end thereof. Thus, the second reflecting mirror reflects the image projected by the auxiliary projection lens such that the lower end portion of the image is reduced in size by the concave surface of the mirror. When the reflected image is projected through a projection lens on a screen inclined with respect to the optical axis of the projection lens, it is displayed as a normal image with the trapezoidal distortion effectively corrected.

REFERENCES:
patent: 4969731 (1990-11-01), Ogino et al.
patent: 4971436 (1990-11-01), Aoki et al.
patent: 5101279 (1992-03-01), Kurematsu et al.
patent: 5128787 (1992-07-01), Blouder
patent: 5250967 (1993-10-01), Miyashita

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