JPS5740850A - Low pressure discharge lamp - Google Patents

Low pressure discharge lamp

Info

Publication number
JPS5740850A
JPS5740850A JP11470080A JP11470080A JPS5740850A JP S5740850 A JPS5740850 A JP S5740850A JP 11470080 A JP11470080 A JP 11470080A JP 11470080 A JP11470080 A JP 11470080A JP S5740850 A JPS5740850 A JP S5740850A
Authority
JP
Japan
Prior art keywords
inner tube
tube
section
noncircular
discharge lamp
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
Application number
JP11470080A
Other languages
Japanese (ja)
Inventor
Makoto Toho
Atsunori Okada
Hiroshi Imamura
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP11470080A priority Critical patent/JPS5740850A/en
Publication of JPS5740850A publication Critical patent/JPS5740850A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

PURPOSE:To simply manufacture a discharge lamp with high mechanical strength and high emission efficiency by providing a double tube structure consisting of a cylindrical outer tube and noncircular cross sectional inner tube, arranging the inner tube between electrodes without sealing process, and using the inside of the inner tube as a discharge passage. CONSTITUTION:Metal caps 2 and 2' adhere to both ends of a cylindrical outer tube 1 and electrodes 3 and 3' are provided on these metal caps. On the other hand, the cross section of an inner tube 4 is rectangular or elliptical and the inner tube adheres to the inside of the outer tube 1. Both of its ends are opened and form a discharge passage. Therefore, the inside and outside of the inner tube 4 are always at the same pressure and free from the stress caused by the atmospheric pressure difference. The tube 4 is not damaged even if it has an extremely noncircular corss section. Besides, since discharge mainly takes place in this noncircular cross section, emission efficiency can be fully improved.
JP11470080A 1980-08-22 1980-08-22 Low pressure discharge lamp Pending JPS5740850A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11470080A JPS5740850A (en) 1980-08-22 1980-08-22 Low pressure discharge lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11470080A JPS5740850A (en) 1980-08-22 1980-08-22 Low pressure discharge lamp

Publications (1)

Publication Number Publication Date
JPS5740850A true JPS5740850A (en) 1982-03-06

Family

ID=14644430

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11470080A Pending JPS5740850A (en) 1980-08-22 1980-08-22 Low pressure discharge lamp

Country Status (1)

Country Link
JP (1) JPS5740850A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04301352A (en) * 1991-03-29 1992-10-23 Toshiba Lighting & Technol Corp Low pressure mercury discharge lamp
WO2002050869A1 (en) * 2000-12-20 2002-06-27 Matsushita Electric Industrial Co., Ltd. Fluorescent lamp
JP2007141612A (en) * 2005-11-17 2007-06-07 Sanken Electric Co Ltd Cold cathode fluorescent discharge tube and planar light source device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04301352A (en) * 1991-03-29 1992-10-23 Toshiba Lighting & Technol Corp Low pressure mercury discharge lamp
WO2002050869A1 (en) * 2000-12-20 2002-06-27 Matsushita Electric Industrial Co., Ltd. Fluorescent lamp
US6771024B2 (en) * 2000-12-20 2004-08-03 Matsushita Electric-Industrial Co., Ltd. Fluorescent lamp
JP2007141612A (en) * 2005-11-17 2007-06-07 Sanken Electric Co Ltd Cold cathode fluorescent discharge tube and planar light source device

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