Optics: image projectors – Cabinet encloses projector and one side of screen
Reexamination Certificate
2007-09-25
2011-10-11
Le, Que T (Department: 2878)
Optics: image projectors
Cabinet encloses projector and one side of screen
C353S119000
Reexamination Certificate
active
08033669
ABSTRACT:
Not only abnormality of a light output to an exterior but also overturning, vibration, disassembly, deformation, or breakage of a display apparatus including a case and a screen are reliably and promptly detected. A projection display apparatus includes a light source (22) for generating illumination light, which is provided in a case (28) having a light-shielding function, a movable aperture (23) for adjusting the amount of illumination light from the light source (22), a light valve (9) for adjusting the amount of light based on an image signal to generate image light for forming an image from the illumination light, a projection optical system (10) for enlarging the image light from the light valve (9), and a transmission-type screen (29) for displaying the image, which is provided to a window of the case (28). The projection display apparatus further includes first to ninth detectors (41to49) for detecting the abnormality of the light output of the light source (22) to the exterior and the abnormality of the case (28) or the transmission-type screen (29), a warning and alarm unit (30) for notifying the abnormality by sound or light, and a control unit (32) for controlling an internal operation when the abnormality is detected.
REFERENCES:
patent: 5582473 (1996-12-01), Toide et al.
patent: 5671993 (1997-09-01), Shikama
patent: 5829855 (1998-11-01), Uchiyama
patent: 6467911 (2002-10-01), Ueyama et al.
patent: 6520647 (2003-02-01), Raskar
patent: 7334901 (2008-02-01), El-Ghoroury
patent: 7465054 (2008-12-01), Howard et al.
patent: 2004/0036970 (2004-02-01), Kamei
patent: 2004/0041988 (2004-03-01), Kitamura
patent: 2006/0061736 (2006-03-01), Iwase
patent: 2006/0232751 (2006-10-01), Kobayashi et al.
patent: 2007/0115548 (2007-05-01), Ebina et al.
patent: 2000-267621 (2000-09-01), None
patent: 2002281532 (2002-09-01), None
Machine Translations of abstract and application of JP 2002-281532.
Endo Takao
Koyata Yasuharu
Nakano Yuzo
Utakoji Takeshi
Brooks Jerry
Le Que T
Mitsubishi Electric Corporation
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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