LIGHT SOURCE DEVICE AND FILAMENT

WIPO Patent Application WO/2013/099760

A1

Provided is a light source device which is provided with a filament that has a high efficiency for converting electrical power into visible light. Provided is a light source device which comprises: a light transmitting airtight container; a filament that is arranged within the light transmitting airtight container; and a lead wire for supplying an electric current to the filament. The filament comprises: a base that is configured of a metal material; and a white scattering body layer that covers the base. A visible light absorbing material, which absorbs light in the visible light region, is added to the white scattering body layer. As a result of this configuration, the reflectance of visible light is decreased and the reflectance of infrared light is increased, so that radiation of infrared light is suppressed and the luminous flux efficiency of visible light is able to be increased.

WO/2020/046881	A DEVICE AND A METHOD FOR EXTREME PARTICLE HEATING
JP4571976	Incandescent lamp with carbide-containing illuminant
JP2002222638	INFRARED LIGHT EMITTING LIGHT SOURCE USED FOR SENSOR, CONCENTRATION DETECTOR, OR THE LIKE, OF SUCH AS GAS

MATSUMOTO TAKAHIRO (JP)

PCT/JP2012/083089

July 04, 2013

December 20, 2012

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STANLEY ELECTRIC CO LTD (JP)

H01K1/04; H01K1/08

JP2011124206A	2011-06-23
JPH10289689A	1998-10-27
JP2006520074A	2006-08-31

Sannozaka Patent Law Firm (JP)
Patent business corporation The Sanno hill patent firm (JP)

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