Invention Grant
- Patent Title: Incandescent bulb, filament, and method for manufacturing filament
- Patent Title (中): 白炽灯泡，灯丝和制造灯丝的方法
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Application No.: US14354557Application Date: 2012-10-24
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Publication No.: US09252006B2Publication Date: 2016-02-02
- Inventor: Takahiro Matsumoto
- Applicant: STANLEY ELECTRIC CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: STANLEY ELECTRIC CO., LTD.
- Current Assignee: STANLEY ELECTRIC CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Holtz, Holtz & Volek PC
- Priority: JP2011-236271 20111027
- International Application: PCT/JP2012/077444 WO 20121024
- International Announcement: WO2013/061993 WO 20130502
- Main IPC: H01K1/50
- IPC: H01K1/50 ; H01K1/02 ; H01K3/02 ; H01K1/40
Abstract:
An object of the present invention is to provide a filament showing improved conversion efficiency with a simple configuration. According to the present invention, surface of a filament material processed into a predetermined shape is processed into a mirror surface by mechanical polishing, and surface roughness (center line average roughness Ra) thereof is thereby made to be 1 μm or smaller. Reflectance of the filament can be thereby improved, and emissivity of the filament for lights of the infrared wavelength region can be suppressed.
Public/Granted literature
- US20140292188A1 INCANDESCENT BULB, FILAMENT, AND METHOD FOR MANUFACTURING FILAMENT Public/Granted day:2014-10-02
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