Title:
DIFFUSION SHEET FOR LED ILLUMINATION, AND LED ILLUMINATING APPARATUS USING SAME
Document Type and Number:
WIPO Patent Application WO/2012/147653
Kind Code:
A1
Abstract:
Provided is a diffusion sheet, wherein lenticular recessed and projected structures are provided on the front surface and the rear surface, each of said lenticular recessed and projected structures having a plurality of rows of cylindrical lens-shaped unit lenses disposed in parallel. The diffusion sheet for LED illumination is characterized in that the ridge line direction of the unit lens rows on the front surface side and the ridge line direction of the unit lens rows on the rear surface side intersect at an angle of 30-90°. An LED illuminating apparatus using the diffusion sheet is also provided.
The present invention provides the diffusion sheet for LED illumination, which has high transmittancy, can adequately solve the problem of a bright point, and does not generate unevenness of output light, and the LED illuminating apparatus using the diffusion sheet.
Inventors:
YAMAGUCHI MINORI (JP)
YAMAZAKI YUKINOBU (JP)
OKUDA KAZUYUKI (JP)
YAMAZAKI YUKINOBU (JP)
OKUDA KAZUYUKI (JP)
Application Number:
PCT/JP2012/060726
Publication Date:
November 01, 2012
Filing Date:
April 20, 2012
Export Citation:
Assignee:
GOYO PAPER WORKING CO LTD (JP)
YAMAGUCHI MINORI (JP)
YAMAZAKI YUKINOBU (JP)
OKUDA KAZUYUKI (JP)
YAMAGUCHI MINORI (JP)
YAMAZAKI YUKINOBU (JP)
OKUDA KAZUYUKI (JP)
International Classes:
G02B5/02; F21S2/00; F21V3/00; F21V5/04; G02B3/00; G02B3/06; F21Y101/02
Domestic Patent References:
| WO2006137459A1 | 2006-12-28 |
Foreign References:
| JP2010267598A | 2010-11-25 | |||
| JP2010287402A | 2010-12-24 | |||
| JP2009206018A | 2009-09-10 |
Attorney, Agent or Firm:
ITAMI KENJI (JP)
Kenji Itami (JP)
Kenji Itami (JP)
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Claims:
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