Optical unit, video display apparatus, and color switching...

Television – Video display – Color sequential

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Reexamination Certificate

active

06952241

ABSTRACT:
A projection-type video display apparatus has a polarizing beam splitter for matching light, which is outputted by a light source unit, to one of S polarizing light and P polarizing light, an optical characteristics switching element for electrically and periodically switching a wavelength band of light outputted by the polarizing beam splitter, a video display element, as a light valve element, for forming an optical image from light outputted by the light source unit, in accordance with a video signal, and a radiating unit for radiating a plurality of color light, which are sequentially outputted by the optical characteristics switching element, to the video display element, wherein light outputted by the video display element is incident on a projecting lens, and a light path from the light source unit to the projecting lens is U-shaped. Consequently, the projection-type video display apparatus becomes compact and has improved contrast.

REFERENCES:
patent: 5347378 (1994-09-01), Handschy et al.
patent: 5921650 (1999-07-01), Doany et al.
patent: 6201901 (2001-03-01), Zhou et al.
patent: 6204901 (2001-03-01), Knox
patent: 6273571 (2001-08-01), Sharp et al.
patent: 0 547 603 (1993-06-01), None
patent: 0 676 740 (1995-10-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Optical unit, video display apparatus, and color switching... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical unit, video display apparatus, and color switching..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical unit, video display apparatus, and color switching... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3451441

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.