JPS5778759A - Metal halide lamp - Google Patents

Metal halide lamp

Info

Publication number
JPS5778759A
JPS5778759A JP15565380A JP15565380A JPS5778759A JP S5778759 A JPS5778759 A JP S5778759A JP 15565380 A JP15565380 A JP 15565380A JP 15565380 A JP15565380 A JP 15565380A JP S5778759 A JPS5778759 A JP S5778759A
Authority
JP
Japan
Prior art keywords
earth metal
subsistance
lighting
oxide
electron emission
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
JP15565380A
Other languages
Japanese (ja)
Inventor
Masato Saito
Keiji Fukuyama
Keiji Watabe
Masahiro 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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP15565380A priority Critical patent/JPS5778759A/en
Publication of JPS5778759A publication Critical patent/JPS5778759A/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
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/073—Main electrodes for high-pressure discharge lamps
    • H01J61/0735—Main electrodes for high-pressure discharge lamps characterised by the material of the electrode
    • H01J61/0737—Main electrodes for high-pressure discharge lamps characterised by the material of the electrode characterised by the electron emissive material

Landscapes

  • Discharge Lamp (AREA)

Abstract

PURPOSE:To recude the delay of lighting at the throw-in of power by employing an electron emission subsistance composed of one kind of alkali earth metal oxid and rare earth metal oxide bound under high temperature for the electrode of a light emission tube. CONSTITUTION:The electrodes 2a, 2b provided in a light emission tube 1 of a metal halide lamp are formed such that inner and outer coils 16, 17 made of a tungsten wire are wound around a core wire 15 made of a tungsten rod then an electron emission subsistance 18 composed of rare earth metal oxide such as scandium oxide and alkali earth metal oxide such as balium oxide is applied and bound under high temperature. Consequently the time required for starting the lighting after the throw-in of power can be shortened considerably by the work function of BaO, CaO itself contained in the electron emission subsistance 18 while the flux maintaining rate at the long term lighting can be improved considerably.
JP15565380A 1980-11-05 1980-11-05 Metal halide lamp Pending JPS5778759A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15565380A JPS5778759A (en) 1980-11-05 1980-11-05 Metal halide lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15565380A JPS5778759A (en) 1980-11-05 1980-11-05 Metal halide lamp

Publications (1)

Publication Number Publication Date
JPS5778759A true JPS5778759A (en) 1982-05-17

Family

ID=15610662

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15565380A Pending JPS5778759A (en) 1980-11-05 1980-11-05 Metal halide lamp

Country Status (1)

Country Link
JP (1) JPS5778759A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61269828A (en) * 1985-05-25 1986-11-29 Mitsubishi Electric Corp Manufacture of electron tube cathode
JPS6222347A (en) * 1985-07-19 1987-01-30 Mitsubishi Electric Corp Cathode for electron tube

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61269828A (en) * 1985-05-25 1986-11-29 Mitsubishi Electric Corp Manufacture of electron tube cathode
JPH0418660B2 (en) * 1985-05-25 1992-03-27 Mitsubishi Electric Corp
JPS6222347A (en) * 1985-07-19 1987-01-30 Mitsubishi Electric Corp Cathode for electron tube

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