Illumination device and projection display device

Details Illumination device and projection display device Illumination device and projection display device

2011-05-24

2011-05-24

Epps, Georgia Y (Department: 2878)

Optics: image projectors

Unitary plural refracting surfaces

C353S085000, C353S122000

Reexamination Certificate

active

07946711

ABSTRACT:
An illumination device includes a light source part for emitting light with an intensity distribution approximately uniform in a first direction and a fly-eye lens into which the light is entered. The light source part and the fly-eye lens are arranged such that the first direction is inclined with respect to vertical and horizontal directions of arrangement of lens cells in the fly-eye lens. Since illumination light is entered into the fly-eye lens in a state of inclining with respect to the fly-eye lens, the number of superimposition patterns on the fly-eye lens is increased and illuminance non-uniformity in illumination light is suppressed.

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patent: 7538948 (2009-05-01), Muenz et al.
patent: 7789517 (2010-09-01), Lee
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patent: 2005-331908 (2005-12-01), None
patent: 99/49358 (1999-09-01), None

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