Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1998-08-03
2000-08-29
Malinowski, Walter
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
348748, 353 52, 353 57, G02F 11333, H04N 574, G03B 2116, G03B 2118
Patent
active
061116300
ABSTRACT:
A liquid crystal projector, comprising: a liquid crystal panel; a light source for irradiating light onto an image formed on the a liquid crystal panel; a projection lens for enlarging and projecting the image projected from the liquid crystal panel; a cooler, such as a suction fan, for sending cooling air flow onto a panel surface of the liquid crystal panel; an air velocity sensor for sensing air velocity of the cooling air flow sent onto the liquid crystal panel; and a protection device for protecting the liquid crystal panel on a basis of a detected value of the air velocity measured by the air velocity sensor. The is further formed an air passage for passing the cooling air flow along with the panel surface of the liquid crystal panel, and the air velocity sensor is positioned in an exit portion of the cooling air flow passing through the liquid crystal panel.
REFERENCES:
patent: 5136397 (1992-08-01), Miyashita
patent: 5682216 (1997-10-01), Lin et al.
IBM Technical Disclosure Bulletin, vol. 29, No. 9, Feb. 1987, pp. 3930-3931, "Cooling Projection System for Passive Display", Feb. 1997.
Hisamatsu Sousuke
Kojima Mitsugi
Watanuki Kiyoshi
Yamamoto Kouichi
Hitachi , Ltd.
Hitachi Video and Information Systems, Inc.
Malinowski Walter
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