Liquid crystal panel and projection display with use of liquid c

Details Liquid crystal panel and projection display with use of liquid c Liquid crystal panel and projection display with use of liquid c

1997-02-05

1999-02-23

Sikes, William L.

Liquid crystal cells, elements and systems

Liquid crystal system

Projector including liquid crystal cell

349 8, 349 10, 349 95, 353 34, 353 37, G02F 11335, G03B 2126

Patent

active

058750088

ABSTRACT:
In an optical system phase device such as .lambda./2 plate or a .lambda./4 plate is used to convert S polarization to P polarization and vice versa. In the projection display, a white light emitted from a light source is separated by a color separation optical system, including dichroic mirrors or a dichroic prism, into three primary colors which are modulated by optical modulation elements. Then, the modulated lights are synthesized by a color synthesis optical system and projected by a projection element onto a screen. When appropriate plates are inserted appropriately in the optical system of the projection display, the conversion between S and P polarization occurs and an optical bandwidth becomes narrow, and color purity can be improved. A thick transparent plate is preferably adhered to the optical modulation element. A light absorption film is applied to an ineffective plane of the transparent plate. The phase device is preferably inserted between an optical modulation element and a transparent plate or the like to improve contrast. The invention can be applied to liquid crystal panels such as liquid crystal/resin display panels, light beam writing type display panel or micro mirror display panel. Preferably, the phase device is set to be rotatable so as to adjust contrast appropriately.

REFERENCES:
patent: 3592527 (1971-07-01), Conners et al.
patent: 3704061 (1972-11-01), Travis
patent: 4521079 (1985-06-01), Leenhouts et al.
patent: 4566935 (1986-01-01), Hornbeck
patent: 5041921 (1991-08-01), Sato et al.
patent: 5056895 (1991-10-01), Kahn
patent: 5130826 (1992-07-01), Takanashi et al.
patent: 5148298 (1992-09-01), Shigeta et al.
patent: 5151801 (1992-09-01), Hiroshima
patent: 5164821 (1992-11-01), Tanaka et al.
patent: 5245449 (1993-09-01), Ooi et al.
patent: 5260815 (1993-11-01), Takizawa
patent: 5365357 (1994-11-01), Ohgawara et al.
patent: 5398081 (1995-03-01), Jones
patent: 5446510 (1995-08-01), Mitsutake et al.
patent: 5526147 (1996-06-01), Omae et al.
patent: 5610735 (1997-03-01), Ohmae et al.

Affiliated with

Also associated with

Rating

Liquid crystal panel and projection display with use of liquid c does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Liquid crystal panel and projection display with use of liquid c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid crystal panel and projection display with use of liquid c will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-311746