JPS5481688A - Incandescent lamp - Google Patents
Incandescent lampInfo
- Publication number
- JPS5481688A JPS5481688A JP14876177A JP14876177A JPS5481688A JP S5481688 A JPS5481688 A JP S5481688A JP 14876177 A JP14876177 A JP 14876177A JP 14876177 A JP14876177 A JP 14876177A JP S5481688 A JPS5481688 A JP S5481688A
- Authority
- JP
- Japan
- Prior art keywords
- film
- filament
- bulb
- infrared rays
- thick
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To largely reduce infrared rays without lowering visible light emitting efficiency of an incandescent lamp by coating titanium oxide fine powder of particle diameter of 10mμ or less on the surface of glass bulb of 100 to 200mμ thick.
CONSTITUTION: Titanium oxide fine powder of 5 to 10mμ in particle diameter is coated on the inside surface of tansparent PS type glass bulb in thin film of 140mμ thick as permeable infrared ray reflecting film 2. Approx. 30% of infrared rays radiated from a filament 5 are reflected on the infrared ray reflecting film to return toward the filament 5. The infrared rays thus returned are partly absorbed at the filament 5 to save the input, and partly reflected externally of the bulb 1 while reflecting repeatedly at the film 2, and further partly absorbed to the bulb 1 to be lost by means of convection. On the other hand, visible lights are mostly transmitted through the film 2 to be thus radiated externally.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14876177A JPS5481688A (en) | 1977-12-13 | 1977-12-13 | Incandescent lamp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14876177A JPS5481688A (en) | 1977-12-13 | 1977-12-13 | Incandescent lamp |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5481688A true JPS5481688A (en) | 1979-06-29 |
Family
ID=15460044
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14876177A Pending JPS5481688A (en) | 1977-12-13 | 1977-12-13 | Incandescent lamp |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5481688A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59169054A (en) * | 1983-03-17 | 1984-09-22 | 東芝ライテック株式会社 | Bulb |
-
1977
- 1977-12-13 JP JP14876177A patent/JPS5481688A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59169054A (en) * | 1983-03-17 | 1984-09-22 | 東芝ライテック株式会社 | Bulb |
JPH0522336B2 (en) * | 1983-03-17 | 1993-03-29 | Toshiba Lighting & Technology |
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