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Title:
照明装置及びそれを用いた投写型表示装置
Document Type and Number:
Japanese Patent JP4944769
Kind Code:
B2
Abstract:
An illuminator includes a color composition prism (24) consisting of first to third prisms (21-23), a red light emitting diode (1), a blue light emitting diode (2) and a green light emitting diode (3) emitting three light beams having different spectrum intervals, a first optical thin film (31) formed on the surface of the first prism (21) opposing the second prism (22) and having a cutoff wavelength between red and green, and a second optical thin film (32) formed on the surface of the second prism (22) opposing the third prism (23) and having a cutoff wavelength between blue and green. Consequently, it is possible to provide an illuminator that can conduct a color composition in which an optical loss at the time of color composition and a color unevenness occurring on the optical thin film due to the incident angle dependency are decreased even for natural light not under a polarization control.

Inventors:
Shimaoka Yusaku
Atsushi Hatayama
Application Number:
JP2007507591A
Publication Date:
June 06, 2012
Filing Date:
July 25, 2006
Export Citation:
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Assignee:
Panasonic Corporation
International Classes:
F21S2/00; G02B5/04; G02B5/08; G02B5/28; G02B19/00; G03B21/14
Domestic Patent References:
JP2006048044A2006-02-16
JPH11142992A1999-05-28
Attorney, Agent or Firm:
Ikeuchi, Sato & Partners



 
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