Title:
Light equipment and a filament
Document Type and Number:
Japanese Patent JP6223186
Kind Code:
B2
Abstract:
A light source device comprising a filament showing high electric power-to-visible light conversion efficiency is provided. A light source device comprising a translucent gastight container, a filament disposed in the translucent gastight container, and a lead wire for supplying an electric current to the filament is provided. The filament comprises a substrate formed from a metal material and a visible light reflectance-reducing film coating the substrate for reducing visible light reflectance of the substrate. The reflectance of the substrate for visible lights is thereby made low, and the reflectance of the substrate for infrared lights is thereby made high. Therefore, radiation of infrared lights is suppressed, and visible luminous efficiency can be enhanced.
Inventors:
Takahiro Matsumoto
Takao Saito
Yasuyuki Kawakami
Takao Saito
Yasuyuki Kawakami
Application Number:
JP2013547245A
Publication Date:
November 01, 2017
Filing Date:
November 30, 2012
Export Citation:
Assignee:
Stanley Electric Co., Ltd.
International Classes:
H01K1/08; H01K1/04; H01K1/10
Domestic Patent References:
| JP2011124206A | ||||
| JP55072357A | ||||
| JP2006156224A | ||||
| JP2006520074A | ||||
| JP2011222211A |
Attorney, Agent or Firm:
Patent Business Corporation Sannozaka Patent Office