Optics: image projectors – Light shield – mask – hood – or diaphragm
Reexamination Certificate
2007-05-08
2007-05-08
Koval, Melissa Jan (Department: 2851)
Optics: image projectors
Light shield, mask, hood, or diaphragm
C353S102000, C359S740000
Reexamination Certificate
active
11072949
ABSTRACT:
Exemplary embodiments provide a projector having a structure capable of easy miniaturization and capable of achieving a smooth moving picture display of good quality. A projector including: an illuminating apparatus; a color separating optical system; liquid crystal display devices; and a projecting optical system, the projector further including: a shielding member provided in the vicinity of a light emitting surface of a first lens array and in which a light transmitting area and a light non-transmitting area are alternately arranged in an optical path in a first direction vertical to an optical axis of illumination; and a rotating prism, which is provided between a superimposing lens and the color separating optical system, for scanning an illuminating light bundle in image forming areas of the liquid crystal display devices synchronously with screen writing frequencies of the liquid crystal display devices.
REFERENCES:
patent: 5428467 (1995-06-01), Schmidt
patent: 6540361 (2003-04-01), Hayashi
patent: 2005/0179872 (2005-08-01), Akiyama
patent: 2006/0092390 (2006-05-01), Akiyama
patent: 2006/0164601 (2006-07-01), Akiyama
patent: 1 489 457 (2004-12-01), None
patent: 11-352444 (1999-12-01), None
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patent: 2004-045872 (2004-02-01), None
patent: WO 03/083573 (2003-10-01), None
Taiichiro Kurita, “Picture Quality of Hold Type Display-for Moving Images”,Technical Report of IEICE, EID99-10 (Jun. 1999), pp. 55-60 (w/English translation).
Koval Melissa Jan
Oliff & Berridg,e PLC
Seiko Epson Corporation
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