Projection display apparatus

Details Projection display apparatus Projection display apparatus

2005-05-10

2005-05-10

Ngo, Huyen (Department: 2871)

Liquid crystal cells, elements and systems

Liquid crystal system

Projector including liquid crystal cell

C349S005000, C359S322000, C353S020000, C353S033000

Reexamination Certificate

active

06891577

ABSTRACT:
In a projection display apparatus that analyzes to pick up lights emitted from a plurality of the reflective light valves, color-composes the analyzed lights and projects the color-composed light, a dichroic film is disposed in at least one of optical paths of the respective color lights between the polarizing beam splitters and the dichroic prism. The dichroic film reflects such a component of a color light derived from the composite light incident on the projection optical system that has been reflected by a surface of a lens element constituting the projection optical system and incident on the dichroic prism after passing through a quarter wave phase plate and reflected or transmitted by the dichroic film within the dichroic prism to travel along the optical path of the color light in the reverse direction, thereby deflecting the color light component out of the optical path.

REFERENCES:
patent: 5268775 (1993-12-01), Zeidler
patent: 5844637 (1998-12-01), Katsumata
patent: 6010221 (2000-01-01), Maki et al.
patent: 20010000678 (2001-05-01), Hattori et al.
patent: 09-251150 (1997-09-01), None
patent: 2000-330196 (2000-11-01), None

Affiliated with

Also associated with

Rating

Projection display apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3381872