LIGHT SOURCE DEVICE

WIPO Patent Application WO/2012/008132

A1

Disclosed is a light source device that is a globe-type light source that uses a laser diode (LD) and that obtains white light emission with a high light flux and is almost uniform in all directions. The light source device has a dual-tube structure comprising a transparent light-emitting tube (11) and a transparent outer tube (15). The light-emitting tube (11) is sealed (112) and the tip of the straight tube (111) is rounded. A fluorescent material layer (12) is formed on an inner surface of a light-emitting region (11a) in the light-emitting tube (11) in the vicinity of the seal (112) and a reflective film (13) is formed on an inner surface of a straight tube region (11b) which is a non-light-emitting section of the light-emitting tube (11). The outer tube (15) is frosted (151). The LD (16) with suppressed temperature increase and attached to a heat radiator (17) is disposed on the release end section of the light-emitting tube (11) and the fluorescent material emits light by the LD (16) radiating laser light on the fluorescent material layer (12). This enables white light emission that has high light flux and is almost uniform in all direction to be obtained while using an LD.

TAKEDA, Yuji (C/O HARISON TOSHIBA LIGHTING CORPORATION, 2-1 Asahimachi 5-chome, Imabari-sh, Ehime 10, 〒7948510, JP)

JP2011/003941

January 19, 2012

July 08, 2011

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HARISON TOSHIBA LIGHTING CORPORATION (2-1 Asahimachi 5-chome, Imabari-shi Ehime, 10, 〒7948510, JP)
ハリソン東芝ライティング株式会社 (〒10 愛媛県今治市旭町５丁目２番地の１ Ehime, 〒7948510, JP)

F21S2/00; F21V3/04; F21V29/00; H01S5/022; F21Y101/02

AMAGI INTERNATIONAL PATENT LAW OFFICE (SOLID SQUARE EAST TOWER 4F, 580 Horikawa-cho, Saiwai-ku, Kawasaki-sh, Kanagawa 13, 〒2120013, JP)

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