JPS57128446A - Metal halide lamp - Google Patents

Metal halide lamp

Info

Publication number
JPS57128446A
JPS57128446A JP1276081A JP1276081A JPS57128446A JP S57128446 A JPS57128446 A JP S57128446A JP 1276081 A JP1276081 A JP 1276081A JP 1276081 A JP1276081 A JP 1276081A JP S57128446 A JPS57128446 A JP S57128446A
Authority
JP
Japan
Prior art keywords
tube
wall
electrode
charged
metal halide
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
JP1276081A
Other languages
Japanese (ja)
Inventor
Toshihiko Ishigami
Shinji Mochimaru
Hiromoto Sasaki
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
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP1276081A priority Critical patent/JPS57128446A/en
Publication of JPS57128446A publication Critical patent/JPS57128446A/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
    • H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
    • H01J61/16—Selection of substances for gas fillings; Specified operating pressure or temperature having helium, argon, neon, krypton, or xenon as the principle constituent

Landscapes

  • Discharge Lamp (AREA)

Abstract

PURPOSE:To prevent any blackening of a metal halide lamp by charging an emission tube with gas containing a given amount of oxygen gas, and removing tungsten adhering to the wall of the tube by means of the said oxygen gas so as to clean the inside of the tube. CONSTITUTION:An emission tube 1 made of quartz, which contains electrodes 2a and 2b made of tungsten, is charged with given amounts of mercury, a halide of a rare earth metal, and argon gas. At the same time, it is charged with oxygen gas at 0.3-5Torr. During the long period of lighting, tungsten adhering to the wall of the tube 1 binds to both isolated iodide and charged oxygen to produce WO2I2. Next, WO2I2 produced is evaporated from the wall of the tube 1, travels along the convection and reaches near the electrode 2a placed in the lower part of the tube 1, and is decomposed due to the high temperature of the electrode 2a. Then, the product of the above decomposition is sent back to the electrode 2a. Consequently, since the wall of the tube 1 is cleaned all the time, any generation of the backening phenomenon of a metal halide lamp can be prevented, and the maintenance rate of the luminous flux of the lamp can be enhanced.
JP1276081A 1981-01-30 1981-01-30 Metal halide lamp Pending JPS57128446A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1276081A JPS57128446A (en) 1981-01-30 1981-01-30 Metal halide lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1276081A JPS57128446A (en) 1981-01-30 1981-01-30 Metal halide lamp

Publications (1)

Publication Number Publication Date
JPS57128446A true JPS57128446A (en) 1982-08-10

Family

ID=11814352

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1276081A Pending JPS57128446A (en) 1981-01-30 1981-01-30 Metal halide lamp

Country Status (1)

Country Link
JP (1) JPS57128446A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009075943A2 (en) * 2007-12-06 2009-06-18 General Electric Company Metal halide lamp with halogen-promoted wall cleaning cycle
WO2009075999A2 (en) * 2007-12-06 2009-06-18 General Electric Company Metal halide lamp including a source of available oxygen
WO2010044020A2 (en) 2008-10-15 2010-04-22 Koninklijke Philips Electronics N.V. Discharge lamp comprising a monoxide radiation emitting material
DE202010014996U1 (en) 2010-11-02 2011-11-11 Osram Ag High pressure discharge lamp
WO2012013527A1 (en) 2010-07-28 2012-02-02 Osram Gesellschaft mit beschränkter Haftung Dysprosium-halide-containing high-pressure discharge lamp
US8358070B2 (en) 2007-12-06 2013-01-22 General Electric Company Lanthanide oxide as an oxygen dispenser in a metal halide lamp
US8653732B2 (en) 2007-12-06 2014-02-18 General Electric Company Ceramic metal halide lamp with oxygen content selected for high lumen maintenance

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7868553B2 (en) 2007-12-06 2011-01-11 General Electric Company Metal halide lamp including a source of available oxygen
WO2009075943A2 (en) * 2007-12-06 2009-06-18 General Electric Company Metal halide lamp with halogen-promoted wall cleaning cycle
WO2009075943A3 (en) * 2007-12-06 2009-08-27 General Electric Company Metal halide lamp with halogen-promoted wall cleaning cycle
WO2009075999A3 (en) * 2007-12-06 2009-11-26 General Electric Company Metal halide lamp including a source of available oxygen
US8653732B2 (en) 2007-12-06 2014-02-18 General Electric Company Ceramic metal halide lamp with oxygen content selected for high lumen maintenance
US8358070B2 (en) 2007-12-06 2013-01-22 General Electric Company Lanthanide oxide as an oxygen dispenser in a metal halide lamp
WO2009075999A2 (en) * 2007-12-06 2009-06-18 General Electric Company Metal halide lamp including a source of available oxygen
WO2010044020A2 (en) 2008-10-15 2010-04-22 Koninklijke Philips Electronics N.V. Discharge lamp comprising a monoxide radiation emitting material
WO2010044020A3 (en) * 2008-10-15 2010-08-26 Koninklijke Philips Electronics N.V. Discharge lamp comprising a monoxide radiation emitting material
DE102010038537A1 (en) 2010-07-28 2012-02-02 Osram Ag High pressure discharge lamp
WO2012013527A1 (en) 2010-07-28 2012-02-02 Osram Gesellschaft mit beschränkter Haftung Dysprosium-halide-containing high-pressure discharge lamp
DE202011110387U1 (en) 2010-07-28 2013-09-25 Osram Gmbh High pressure discharge lamp
US8853943B2 (en) 2010-07-28 2014-10-07 Osram Ag Dysprosium-halide-containing high-pressure discharge lamp
DE202010014996U1 (en) 2010-11-02 2011-11-11 Osram Ag High pressure discharge lamp

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