Optics: image projectors – Temperature control – Blower
Reexamination Certificate
2006-11-07
2006-11-07
Mahoney, Christopher (Department: 2851)
Optics: image projectors
Temperature control
Blower
C353S085000
Reexamination Certificate
active
07131731
ABSTRACT:
In a projection type video display apparatus comprising a light source lamp and a light valve for controlling the intensity of output light of the light source lamp, a projection type video display apparatus comprises a light source lamp cooling fan for cooling the light source lamp; judgment means for judging the brightness of an image on the basis of an image signal; first control means for controlling the luminescent intensity of the light source lamp on the basis of the results of the judgment by the judgment means; and second control means for controlling the rotational speed of the light source lamp cooling fan on the basis of the results of the judgment by the judgment means, the first control means controlling the luminescent intensity of the light source lamp such that the brighter the image is, the higher the luminescent intensity of the light source lamp becomes, and the second control means controlling the rotational speed of the light source lamp cooling fan such that the brighter the image is, the higher the rotational speed of the light source lamp cooling fan becomes.
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Mahoney Christopher
Sanyo Electric Co,. Ltd.
Westerman, Hattori, Daniels & Adrian , LLP.
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