Title:
白熱電球及び白熱電球用フィラメント
Document Type and Number:
Japanese Patent JP3863554
Kind Code:
B2
Abstract:
An incandescent bulb filament having a flat Light-emitting surface and high Lamp efficiency and an incandescent bulb using this filament are provided. This incandescent bulb filament is characterized in that it is a filament of ribbon shape placed on one plane, and it includes: spaced portions which are placed side by side with spaces; and connecting portions which connect the spaced portions electrically in series. Each spaced portion has a thickness that is one half the width of the spaced portion or more, and the space between at least one pair of adjacent spaced portions is less than five times the width of the spaced portion.
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Inventors:
Kazuaki Okubo
Mitsuhiko Kimoto
Yuriko Kaneko
Mika Sakagami
Makoto Horiuchi
Mitsuhiko Kimoto
Yuriko Kaneko
Mika Sakagami
Makoto Horiuchi
Application Number:
JP2005516834A
Publication Date:
December 27, 2006
Filing Date:
December 22, 2004
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H01K1/14; H01K1/18
Domestic Patent References:
| JP2002015707A | ||||
| JP4368769A | ||||
| JP60095850A | ||||
| JP5166496A | ||||
| JP53002976A |
Foreign References:
| GB1342070B |
Attorney, Agent or Firm:
Hiromori Arai