Title:
発光装置、面光源および液晶ディスプレイ装置
Document Type and Number:
Japanese Patent JP5380182
Kind Code:
B2
Abstract:
A lighting device includes a light emitting element that emits a first colored light; a phosphor layer disposed on the light emitting element; and a lens part that is disposed so as to cover the light emitting element and the phosphor layer, and radiates light entering inside of the lens part so as to spread the light radially. The phosphor layer allows a part of the first colored light to transmit therethrough and converts another part of the first colored light into a second colored light having a wavelength longer than that of the first colored light. The lens part has: a base portion forming a light entrance surface through which the first colored light and the second colored light enter the lens part; and a diffraction portion forming a light exit surface through which the first colored light and the second colored light exit the lens part, the diffraction portion being configured so that a refracting power with respect to the second colored light is larger than a refracting power with respect to the first colored light.
Inventors:
Daisaburo Matsuki
Shunsuke Kimura
Tomoko Iiyama
Shunsuke Kimura
Tomoko Iiyama
Application Number:
JP2009158716A
Publication Date:
January 08, 2014
Filing Date:
July 03, 2009
Export Citation:
Assignee:
Panasonic Corporation
International Classes:
F21S2/00; G02F1/13357; F21Y101/02
Domestic Patent References:
| JP2007148332A | ||||
| JP2006324256A | ||||
| JP2007227410A | ||||
| JP2006148147A | ||||
| JP2007194190A |
Foreign References:
| WO2008104936A1 |
Attorney, Agent or Firm:
Koichi Kamata
Hiroki Naito
Daisuke Nagano
Kentaro Fujii
Hiroki Naito
Daisuke Nagano
Kentaro Fujii