Projector

Details Projector Projector

2005-05-03

2005-05-03

Dowling, William C. (Department: 2851)

Optics: image projectors

Light shield, mask, hood, or diaphragm

Reexamination Certificate

active

06886945

ABSTRACT:
A projector is provided to ensure the enhancement of contrasts while reducing the needs for alignment accuracy. The projector includes a light source, a first lens array, a second lens array, a superimposing lens, and a projection lens. The first lens array splits light emitted by the light source into a plurality of partial light beams with a plurality of small lenses that are arranged in a matrix. The second lens array includes a plurality of small lenses corresponding to the plurality of small lenses of the first lens array. The superimposing lens superimposes a plurality of partial light beams emitted by the first lens array and the second lens array on a liquid crystal panel. The projection lens projects light modulated by the liquid crystal panel. In the projector, a diaphragm having an opening that is shaped to be nearly similar to the outline of the second lens array is provided in the vicinity of an area conjugated with the second lens array.

REFERENCES:
patent: 5098184 (1992-03-01), van den Brandt et al.
patent: 6726334 (2004-04-01), Ishino
patent: A-303085 (1993-11-01), None

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