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Patent Searching and Data


Title:
PROJECTION TYPE DISPLAY DEVICE AND MANUFACTURING METHOD THEREOF
Document Type and Number:
Japanese Patent JP3880576
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To design/develop two or more types of light valves different in size by minimumly changing optical components or changing their layout.
SOLUTION: The projection type display device has an optical unit 601 that includes the light valves 311, 321, and 331 and a color splitting illumination part 200 for emitting illumination light to the effective illumination ares of the light valves. The light valves 311, 321, and 331 can be exchanged with light valves whose sizes are different from theirs. The disposition and the shape of a condenser lens 221 composing the color splitting illumination part 200 can be altered according to the sizes of the light valves mounted on the optical unit 601.


Inventors:
Akihiro Osaka
Application Number:
JP2004011909A
Publication Date:
February 14, 2007
Filing Date:
January 20, 2004
Export Citation:
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Assignee:
NEC View Technology Co., Ltd.
International Classes:
G02B19/00; G03B21/00; G02B13/00; G02F1/13; G02F1/13357; G03B21/14; (IPC1-7): G03B21/00; G02B13/00; G02B19/00; G02F1/13; G02F1/13357; G03B21/14
Domestic Patent References:
JP2005043448A
JP2003091045A
JP2003023585A
JP2002372750A
JP2002296538A
JP2000347153A
JP11239311A
JP11231416A
Attorney, Agent or Firm:
Akio Miyazaki
Ishibashi Masayuki
Masaaki Ogata