,申请号JP20030171474-传众专利搜索

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发明名称
摘要	A projection display according to the present invention reduces the size of a light beam in the optical path of an illumination optics from the periphery to change the amount of light incident on a video display device and the angle of such incidence, thereby making a plurality of image brightness/contrast combinations selectable. Further, the present invention changes the revolving speed of a projection display cooling fan and the adjustment value settings for the video display device's electrical characteristics in accordance with the aperture.
申请公布号	JP4158611(B2)	申请公布日期	2008.10.01
申请号	JP20030171474	申请日期	2003.06.17
申请人		发明人
分类号	G02F1/13;G03B21/14;G02F1/133;G02F1/1335;G02F1/13357;G03B21/00;G03B21/16	主分类号	G02F1/13
代理机构		代理人
主权项
地址

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