JPS57128448A - Electric discharge lamp - Google Patents

Electric discharge lamp

Info

Publication number
JPS57128448A
JPS57128448A JP1412081A JP1412081A JPS57128448A JP S57128448 A JPS57128448 A JP S57128448A JP 1412081 A JP1412081 A JP 1412081A JP 1412081 A JP1412081 A JP 1412081A JP S57128448 A JPS57128448 A JP S57128448A
Authority
JP
Japan
Prior art keywords
discharge
bulb
plate
route
electric discharge
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
JP1412081A
Other languages
Japanese (ja)
Inventor
Takao Takeda
Hiroshi Ito
Hitoshi Yamazaki
Jun Imai
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 JP1412081A priority Critical patent/JPS57128448A/en
Publication of JPS57128448A publication Critical patent/JPS57128448A/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
    • H01J61/10—Shields, screens, or guides for influencing the discharge
    • H01J61/103—Shields, screens or guides arranged to extend the discharge path

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

PURPOSE:To prevent any decrease of the efficiency and any insufficiency of the luminance of an electric discharge lamp by making a discharge-route restricting body, which divides the internal discharge space of the bulb into halves, to have an oval shape having an expanded part in its center, and providing an over plate, which works as a light emitting surface, on the discharge-route restricting body. CONSTITUTION:A pair of opposed electrodes 3 are provided at an end of a bulb 1, the inner wall of which is coated with a phosphor layer 2. After that, a discharge-route restricting body 4, which has an oval shape and the width of the central part of which is larger than that of its side part, is installed between the electrodes 3 so that a U-shaped discharge route, which has a crescent-shaped cross section and passes through the end of the bulb 1, is formed. In addition, an over plate 10 is affixed over the body 4, and a phosphor layer is formed on the plate 10 so as to make a light emitting surface. As a result, the efficiency of an electric discharge lamp is enhanced since the discharging part with a high current density can be made closer to the inner wall of the bulb 1. Besides, the luminance of the lamp can be enhanced by increasing light by the emission of the plate 10.
JP1412081A 1981-02-02 1981-02-02 Electric discharge lamp Pending JPS57128448A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1412081A JPS57128448A (en) 1981-02-02 1981-02-02 Electric discharge lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1412081A JPS57128448A (en) 1981-02-02 1981-02-02 Electric discharge lamp

Publications (1)

Publication Number Publication Date
JPS57128448A true JPS57128448A (en) 1982-08-10

Family

ID=11852255

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1412081A Pending JPS57128448A (en) 1981-02-02 1981-02-02 Electric discharge lamp

Country Status (1)

Country Link
JP (1) JPS57128448A (en)

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