Title:
照明装置およびそれを備えた画像表示装置ならびに導光体
Document Type and Number:
Japanese Patent JP4208878
Kind Code:
B2
Abstract:
An illumination device according to the present invention includes a light source; and a lightguide element including an incidence surface for receiving light emitted from the light source and an outgoing surface from which the light incident from the incidence surface goes out. The lightguide element includes a polarization selection layer for causing light of a specific polarization direction (first polarized light), among the light incident from the incidence surface, to selectively go out from the outgoing surface, and a polarization conversion layer for converting second polarized light, polarized in a different direction from that of the first polarized light, into the first polarized light. The polarization selection layer reflects the first polarized light substantially only toward the outgoing surface.
Inventors:
Takeshi Masuda
Application Number:
JP2005502150A
Publication Date:
January 14, 2009
Filing Date:
October 28, 2003
Export Citation:
Assignee:
Sharp Corporation
International Classes:
F21V8/00; G02B5/30; G02B6/00; G02F1/13357; F21Y103/00
Domestic Patent References:
| JP9005739A | ||||
| JP10020125A | ||||
| JP9134607A | ||||
| JP2001264698A | ||||
| JP2002071965A | ||||
| JP2001060063A | ||||
| JP2001507483A |
Attorney, Agent or Firm:
Seiji Okuda
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