Title:
FILAMENT LAMP
Document Type and Number:
Japanese Patent JP2018060639
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a structure in a filament lamp, in which reflected light from a reflection film is emitted from an arc tube without returning to a filament so as to be effectively used thereby to improve the luminous efficiency of the filament lamp, the filament lamp including a coiled filament in an arc tube and having a reflection film formed on a part of the external surface of the arc tube in a circumferential direction.SOLUTION: In a filament lamp, the coil center of a filament in an arc tube is offset to a reflection film side with respect to the center of the arc tube.SELECTED DRAWING: Figure 1
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Inventors:
TERAO YUYA
IKUSHIMA KAZUYUKI
IKUSHIMA KAZUYUKI
Application Number:
JP2016196251A
Publication Date:
April 12, 2018
Filing Date:
October 04, 2016
Export Citation:
Assignee:
USHIO ELECTRIC INC
International Classes:
H01K1/18; H01K1/28; H01K1/32
Attorney, Agent or Firm:
Tsutomu Igarata
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