Title:
フィラメントランプ
Document Type and Number:
Japanese Patent JP7343839
Kind Code:
B2
Abstract:
To provide a filament lamp in which removal of a reflection film formed inside an arc tube is suppressed.SOLUTION: A filament lamp comprises: a cylindrical arc tube which exhibits transmissivity to light; a filament which extends in the arc tube along a tube axis direction of the arc tube; a reflection film which extends in the tube axis direction of the arc tube, and whose cross-sectional shape formed when being cut by a plane perpendicular to the tube axis direction of the arc tube has a first end and a second end in a circumferential direction of an inner wall surface of the arc tube; a first protective film which extends on the inner wall surface of the arc tube in the tube axis direction of the arc tube so as to come into contact with the first end; and a second protective film which extends on the inner wall surface of the arc tube in the tube axis direction of the arc tube so as to come into contact with the second end.SELECTED DRAWING: Figure 2
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Inventors:
Tadakazu Kawamura
Takafumi Mizoshiri
Satoru Furue
Takafumi Mizoshiri
Satoru Furue
Application Number:
JP2020000956A
Publication Date:
September 13, 2023
Filing Date:
January 07, 2020
Export Citation:
Assignee:
Ushio, Inc.
International Classes:
H01K1/32; H01K1/28; H05B3/10; H05B3/44
Domestic Patent References:
| JP1251549A | ||||
| JP63006661U | ||||
| JP50027316B1 | ||||
| JP2015069888A | ||||
| JP2001006626A | ||||
| JP2007528092A | ||||
| JP2007525797A |
Foreign References:
| US6611101 | ||||
| US20060192470 | ||||
| US20080304275 |
Attorney, Agent or Firm:
Patent Attorney Corporation Junias International Patent Office
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