EP0254147A3 - Hot cathode type discharge lamp apparatus - Google Patents

Hot cathode type discharge lamp apparatus Download PDF

Info

Publication number
EP0254147A3
EP0254147A3 EP87109937A EP87109937A EP0254147A3 EP 0254147 A3 EP0254147 A3 EP 0254147A3 EP 87109937 A EP87109937 A EP 87109937A EP 87109937 A EP87109937 A EP 87109937A EP 0254147 A3 EP0254147 A3 EP 0254147A3
Authority
EP
European Patent Office
Prior art keywords
discharge lamp
tube
lamp apparatus
cathode electrode
hot cathode
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.)
Withdrawn
Application number
EP87109937A
Other languages
German (de)
French (fr)
Other versions
EP0254147A2 (en
Inventor
Shouichi Iwaya
Hitoshi Masumura
Munemitsu Hamada
Hiromi Ohfuna Seisakusho Mitsubishi Denki Adachi
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
TDK Corp
Original Assignee
Mitsubishi Electric Corp
TDK 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
Priority claimed from JP1986108594U external-priority patent/JPH0512917Y2/ja
Priority claimed from JP1986108596U external-priority patent/JPH0514453Y2/ja
Application filed by Mitsubishi Electric Corp, TDK Corp filed Critical Mitsubishi Electric Corp
Publication of EP0254147A2 publication Critical patent/EP0254147A2/en
Publication of EP0254147A3 publication Critical patent/EP0254147A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • 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

Landscapes

  • Discharge Lamp (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

Hot cathode type discharge lamp apparatus of the invention is composed of a tube for discharge lamp, a cathode electrode member in nearly cylindrical form made of a semiconductor porcelain and arranged within the tube and including a longitudinal circumferential surface made a discharge surface, and two lead wires connected to both longitudinal ends of the cathode electrode member and penetrating an end portion of the tube. In the discharge lamp apparatus, since an electron emission material is not used in the cathode electrode but the semiconductor porcelain is used, activation of the electron emission material due to heating is not produced, thereby blackening phenomenon of the tube wall of the discharge tube can be prevented and the life becomes long.
EP87109937A 1986-07-15 1987-07-09 Hot cathode type discharge lamp apparatus Withdrawn EP0254147A3 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP108594/86 1986-07-15
JP1986108594U JPH0512917Y2 (en) 1986-07-15 1986-07-15
JP1986108596U JPH0514453Y2 (en) 1986-07-15 1986-07-15
JP108596/86 1986-07-15

Publications (2)

Publication Number Publication Date
EP0254147A2 EP0254147A2 (en) 1988-01-27
EP0254147A3 true EP0254147A3 (en) 1990-03-21

Family

ID=26448436

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87109937A Withdrawn EP0254147A3 (en) 1986-07-15 1987-07-09 Hot cathode type discharge lamp apparatus

Country Status (3)

Country Link
EP (1) EP0254147A3 (en)
KR (1) KR920001845B1 (en)
CN (1) CN1006343B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19822100A1 (en) 1998-05-16 1999-11-18 Philips Patentverwaltung Stereo / two-tone demodulator
DE19915616A1 (en) * 1999-04-07 2000-10-12 Philips Corp Intellectual Pty Gas discharge lamp
JP4112449B2 (en) * 2003-07-28 2008-07-02 株式会社東芝 Discharge electrode and discharge lamp

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2251045A (en) * 1929-06-29 1941-07-29 Gen Electric Gaseous electric discharge device
US3766423A (en) * 1971-12-03 1973-10-16 Itt Integral emissive electrode

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2251045A (en) * 1929-06-29 1941-07-29 Gen Electric Gaseous electric discharge device
US3766423A (en) * 1971-12-03 1973-10-16 Itt Integral emissive electrode

Also Published As

Publication number Publication date
KR920001845B1 (en) 1992-03-05
CN87104929A (en) 1988-01-27
EP0254147A2 (en) 1988-01-27
KR880002216A (en) 1988-04-29
CN1006343B (en) 1990-01-03

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RIN1 Information on inventor provided before grant (corrected)

Inventor name: ADACHI, HIROMIO

Inventor name: IWAYA, SHOUICHI

Inventor name: HAMADA, MUNEMITSU

Inventor name: MASUMURA, HITOSHI