JPS6412456A - Discharge lamp - Google Patents
Discharge lampInfo
- Publication number
- JPS6412456A JPS6412456A JP16802187A JP16802187A JPS6412456A JP S6412456 A JPS6412456 A JP S6412456A JP 16802187 A JP16802187 A JP 16802187A JP 16802187 A JP16802187 A JP 16802187A JP S6412456 A JPS6412456 A JP S6412456A
- Authority
- JP
- Japan
- Prior art keywords
- phosphor
- ultraviolet rays
- bulb
- deterioration
- protective layer
- 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.)
- Granted
Links
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
PURPOSE:To improve a life characteristic by preventing a phosphor from early deterioration by applying a protective material against ultraviolet rays to a phosphor facing the inner side of an outer electrode. CONSTITUTION:For a lamp whose inner diameter of a bulb is less than 3cm and its bulb wall load is more than 500W/m<2>, on the inner surface of a rare- earth phosphor film 2 formed on an inner surface of the bulb 1 a phosphor protective layer 8 is formed, which is located on the inner surface side of an external electrode 5 and mitigates the deterioration of phosphor caused by ultraviolet rays. The phosphor protective layer 8 comprises, for example, a metallic oxide such as silica, titanium oxide, etc., and it reflects or absorbs short wavelength ultraviolet rays of more or less 147nm emitted from a rare gas whose main constituent is xenon. The phosphor film 2 is thereby prevented from the deterioration caused by short wavelength ultraviolet rays.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16802187A JPH0687413B2 (en) | 1987-07-06 | 1987-07-06 | Discharge lamp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16802187A JPH0687413B2 (en) | 1987-07-06 | 1987-07-06 | Discharge lamp |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6412456A true JPS6412456A (en) | 1989-01-17 |
JPH0687413B2 JPH0687413B2 (en) | 1994-11-02 |
Family
ID=15860337
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16802187A Expired - Lifetime JPH0687413B2 (en) | 1987-07-06 | 1987-07-06 | Discharge lamp |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0687413B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02288153A (en) * | 1989-04-28 | 1990-11-28 | Toshiba Lighting & Technol Corp | Low pressure discharge lamp |
-
1987
- 1987-07-06 JP JP16802187A patent/JPH0687413B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02288153A (en) * | 1989-04-28 | 1990-11-28 | Toshiba Lighting & Technol Corp | Low pressure discharge lamp |
Also Published As
Publication number | Publication date |
---|---|
JPH0687413B2 (en) | 1994-11-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 13 Free format text: PAYMENT UNTIL: 20071102 |