Dynamic optical compensation for color sequential projection dis

Details Dynamic optical compensation for color sequential projection dis Dynamic optical compensation for color sequential projection dis

1998-07-29

1999-11-16

Dowling, William C.

Optics: image projectors

Color filter

353 31, 348743, G03B 2114

Patent

active

059844787

ABSTRACT:
A display for displaying a color image formed of a plurality of color light components is provided, wherein each color light component has a focal length and a magnification. The display has a light source for providing polarized light of a first polarization and a color filter wheel having segments of different color filters for sequentially separating the polarized light into a plurality of different color lights. Also provided is a directing means for directing the different color lights having the first polarization to a light valve and for directing respective color light components of a second polarization transmitted from the light valve towards a screen. A dynamic focus element is provided in the display for adjusting the focal length and/or magnification of each color light component to minimize chromatic variations between the color light components. Lastly, a lens is provided for magnifying and projecting the adjusted color light components onto the screen to produce the color image. In variations of the present invention, the dynamic focus element are various mechanical and electro-optical devices.

REFERENCES:
patent: 5371543 (1994-12-01), Anderson
patent: 5463433 (1995-10-01), Koo
patent: 5467146 (1995-11-01), Huang et al.
patent: 5612753 (1997-03-01), Poradish et al.
patent: 5784038 (1998-06-01), Irwin
patent: 5805243 (1998-09-01), Hatano et al.
patent: 5863125 (1999-01-01), Doany
patent: 5868482 (1999-02-01), Edlinger et al.

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