Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1997-01-02
1999-08-10
Nguyen, Tiep H.
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
349 72, 349199, 219497, G02F 1133, G02F 11333
Patent
active
059366966
ABSTRACT:
A projection type display apparatus including a heater for heating the liquid crystal light valve. The heater includes a transparent electrically conductive film formed on a transparent substrate and is supplied with electric power therethrough to generate heat. The supplied electric power is controlled in accordance with the temperature of the liquid crystal light valve so that the liquid crystal layer in the liquid crystal light valve is in its optimum operating temperature range. The heater may include a filter through which the illumination luminous flux is incident upon the liquid crystal light valve. The filter passes only visible light when inclined within a certain range of angle with the luminous flux, and passes a progressively large amount of heat rays with increasing deviation of the angle from the certain range. A cold mirror and reflecting mirror may be used in place of the filter. The cold mirror reflects visible light of the illumination luminous flux to the liquid crystal light valve and passes heat rays to the reflecting mirror. The reflecting mirror is at an angle with the heat rays and reflects the heat rays to the liquid crystal light valve. The amount of the heat rays reflected to the liquid crystal light valve may be adjusted by varying the angle at which the heat rays is incident on the reflecting mirror.
REFERENCES:
patent: 4634225 (1987-01-01), Haim et al.
patent: 4946263 (1990-08-01), Vaz et al.
patent: 5767924 (1998-06-01), Hiroki et al.
patent: 5781266 (1998-07-01), Nakao et al.
LCPC Projection Display System for HDTV, Proceeding of the 12th International Display Research Conference, pp. 113-116 (1992), by Y. Ooi et al.
A Polymer Network Liquid Crystal poly-CdSe TFT Active Matrix Display, Conference Record of the 1991 International Display Research Conference pp. 215-218 (1991), by J. De Baets et al.
A Hysteresis-Less LCPC Device for a Projection Display, SID '92 Digest, pp. 575-578 (1992), by S. Niiyama et al.
Daijogo Akira
Shikama Shinsuke
Mitsubishi Denki & Kabushiki Kaisha
Nguyen Tiep H.
LandOfFree
Projection type 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 type display apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Projection type display apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1125314