JPS6412456A - Discharge lamp - Google Patents

Discharge lamp

Info

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
Application number
JP16802187A
Other languages
Japanese (ja)
Other versions
JPH0687413B2 (en
Inventor
Akihiro Inoue
Yoshitomi Dobashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP16802187A priority Critical patent/JPH0687413B2/en
Publication of JPS6412456A publication Critical patent/JPS6412456A/en
Publication of JPH0687413B2 publication Critical patent/JPH0687413B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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.
JP16802187A 1987-07-06 1987-07-06 Discharge lamp Expired - Lifetime JPH0687413B2 (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02288153A (en) * 1989-04-28 1990-11-28 Toshiba Lighting & Technol Corp Low pressure discharge lamp

Cited By (1)

* Cited by examiner, † Cited by third party
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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