LIGHTING DEVICE - KOITO MFG CO LTD

Title:

LIGHTING DEVICE

Document Type and Number:

WIPO Patent Application WO/2011/145238

Kind Code:

A1

Abstract:

The disclosed lighting device is provided with a light-emitting device and a diffusion member. The light-emitting device has: a plurality of light-emitting elements that emit light with a peak wavelength between 380 and 420 nm; first phosphors that emit visible light with a peak wavelength between 560 and 600 nm; second phosphors that are excited by ultraviolet light or short-wavelength visible light and emit visible light of a color complementary to the color of the light emitted by the first phosphors; and a light-transmitting member that covers the plurality of light-emitting elements. The first phosphors and the second phosphors are distributed inside the light-transmitting member, constituting a total of between 0.01% and 10% of the volume of the light-transmitting member. The diffusion member diffuses at least some of the light emitted from the light-emitting device. The light-transmitting member is shaped such that the thickness thereof in the direction perpendicular to the light-emission plane of the light-emitting elements is between 0.4 and 20 mm.

Inventors:

DAICHO HISAYOSHI (JP)

Application Number:

PCT/JP2011/000682

Publication Date:

November 24, 2011

Filing Date:

February 08, 2011

Export Citation:

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Assignee:

KOITO MFG CO LTD (JP)
DAICHO HISAYOSHI (JP)

International Classes:

F21S2/00; F21V3/00; F21V9/16; H01L33/50; F21Y101/02

Domestic Patent References:

WO2009077278A1

2009-06-25

Foreign References:

JP2009158462A	2009-07-16
JP2006261540A	2006-09-28
JP2004221528A	2004-08-05
JP2005115372A	2005-04-28

Other References: