Optical projector and image display apparatus using the same

Details Optical projector and image display apparatus using the same Optical projector and image display apparatus using the same

2007-08-28

2007-08-28

Dowling, William C. (Department: 2851)

Optics: image projectors

Composite projected image

Multicolor picture

C353S122000, C349S005000

Reexamination Certificate

active

10922706

ABSTRACT:
Image disturbance called speckle noise occurs when an image generator has a small effective screen size and a projection lens has a small effective diameter. The present invention is intended to reduce speckle noise. In an optical projector, a viewing angle enlarging ember (60) for enlarging viewing angle or a scattering member (28) for scattering image light is disposed near an image display device (18), such as a liquid crystal panel. Speckle noise can be reduced, suppressing the deterioration of resolution and contrast.

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