Optics: image projectors – Composite projected image – Plural projection paths with single light source
Patent
1993-02-22
1994-02-01
Cuchlinski, Jr., William A.
Optics: image projectors
Composite projected image
Plural projection paths with single light source
353 33, 353 37, 353 20, 359 40, 359 48, G02F 113
Patent
active
052836002
ABSTRACT:
An LCD projector for projecting an image displayed on an LCD of the electrooptic-effect type on a projection screen is disclosed. The LCD projector has a polarization beam-splitting optical system which is disposed in the optical path of a projection beam between a light source and the LCD. The optical system has a plurality of optical subsystems and at least one optical rotator. Each optical subsystem has a reflecting device and a polarization beam splitter arrangement provided with a polarization beam-splitting plane arrangement. The polarization beam splitter arrangement and the beam-splitting plane arrangement are arrangements of one or more polarization beam splitters and of one or more polarization beam-splitting planes, respectively. The beam-splitting plane arrangements provided in the plurality of the optical subsystems are disposed in the optical path of the projection beam and oriented with respect to the projection beam so as to define planes of incidence parallel to each other. The reflecting device is made up of one or more reflectors oriented so that the s-polarized component reflected on the polarization beam-splitting plane arrangement is deflected toward a prescribed region of the incidence surface of the LCD. The optical rotator makes parallel the directions of the s- and p-polarized components delivered from the optical system.
REFERENCES:
patent: 4913529 (1990-04-01), Goldenberg et al.
patent: 5042921 (1991-08-01), Sato et al.
patent: 5153752 (1992-10-01), Kurematsu et al.
patent: 5172254 (1992-12-01), Atarashi et al.
patent: 5200843 (1993-04-01), Karasawa et al.
Proceedings of Eurodisplay 1990, Report of The Tenth International Display Research Conference, pp. 64 through 67.
Cuchlinski Jr. William A.
Dowling William C.
NEC Corporation
LandOfFree
LCD projector does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with LCD projector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and LCD projector will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-582832