Title:
LED ILLUMINATOR, AND THIN, SURFACE LIGHT-EMITTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2010/146664
Kind Code:
A1
Abstract:
Disclosed is an illuminator comprising: a reflector having a cup-shaped reflection face on the inner side of the surface of rotation which is formed by rotating, on one axis, either a portion of an ellipse, a parabola, a hyperbola or another curve, or a line segment having a curve and a straight line together; and a light-transmitting plate disposed near the opening of the cup-shaped reflection face and having multiple ridges arranged on the two principal faces thereof in parallel with each other and sufficiently close to each other. Furthermore, the illuminator comprises an optical diffusion transmitting plate, in which a section perpendicular to the longitudinal direction of each ridge substantially forms a portion of a circle in a predetermined shape and size thereby to provide a substantial mirror surface including the surface of those ridges, and in which the ridges intersect perpendicularly between the two principal faces. LED packages are arranged equidistantly on the circumference centered by the axis of rotation of the cup-shaped reflection face, and a luminous flux near the center line among the luminous fluxes of the individual LED packages is directly incident on and reflected by a reflection face so that the luminous flux is incident on the optical diffusion transmitting plate and emanates from one face of same.
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Inventors:
OYAMA, Nobuo (22-8-301 Otsuka 3-chome, Bunkyo-k, Tokyo 12, 〒1120012, JP)
Application Number:
JP2009/060951
Publication Date:
December 23, 2010
Filing Date:
June 16, 2009
Export Citation:
Assignee:
KABUSHIKI KAISHA S.T.I.JAPAN (14-7, Yushima 3-chome Bunkyo-k, Tokyo 34, 〒1130034, JP)
株式会社エス・テー・アイ・ジャパン (〒34 東京都文京区湯島３丁目１４番７号 Tokyo, 〒1130034, JP)
株式会社エス・テー・アイ・ジャパン (〒34 東京都文京区湯島３丁目１４番７号 Tokyo, 〒1130034, JP)
International Classes:
F21V13/12; F21S2/00; F21S8/04; F21S11/00; F21V5/04; F21Y101/02
Attorney, Agent or Firm:
KITAMURA, Chikahiko (LEAD INTERNATIONAL PATENT OFFICE, Takou Building Kudan 7th floor 8-5, Iidabashi 2-chom, Chiyoda-ku Tokyo 72, 〒1020072, JP)
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