Title:
OPTICAL WAVEGUIDE, AND PLANAR ILLUMINATING APPARATUS AND LIQUID CRYSTAL DISPLAY APPARATUS USING THE OPTICAL WAVEGUIDE
Document Type and Number:
WIPO Patent Application WO/2005/121639
Kind Code:
A1
Abstract:
An optical waveguide is provided with a plurality of transparent optical waveguides, and thin edge parts of the adjacent optical waveguide units are connected. The connected optical waveguide units are arranged to constitute a same flat plane by light projecting planes of the optical waveguide units. A shape of the optical waveguide unit satisfies 1.6R≤L and 0.6R≤D, where, R is a diameter of a bar-shaped light source, L is a distance from a plane, which passes a center axis of the bar-shaped light source and is vertical to the light projecting plane, to an edge plane of the thin edge part, which is a connecting part of the adjacent optical waveguide units, and D is the maximum thickness of a thick part of the optical waveguide unit. Thus, the larger size light projecting plane is provided, and projecting efficiency of the light projected from the light source is improved.
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Inventors:
MATSUSHITA MOTOHIKO (JP)
Application Number:
PCT/JP2005/010360
Publication Date:
December 22, 2005
Filing Date:
June 06, 2005
Export Citation:
Assignee:
FUJI PHOTO FILM CO LTD (JP)
MATSUSHITA MOTOHIKO (JP)
MATSUSHITA MOTOHIKO (JP)
International Classes:
F21V8/00; G02B6/00; G02F1/13357; (IPC1-7): F21V8/00; G02B6/00; G02F1/3357
Foreign References:
| JP2004022344A | 2004-01-22 | |||
| JPH10133027A | 1998-05-22 | |||
| JP2002075034A | 2002-03-15 | |||
| JPH05249320A | 1993-09-28 |
Attorney, Agent or Firm:
Watanabe, Mochitoshi (12-5 Iwamoto-cho 2-chom, Chiyoda-ku Tokyo 32, JP)
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