EP0878829A3 - Discharge lamp electrode - Google Patents

Discharge lamp electrode Download PDF

Info

Publication number
EP0878829A3
EP0878829A3 EP98108867A EP98108867A EP0878829A3 EP 0878829 A3 EP0878829 A3 EP 0878829A3 EP 98108867 A EP98108867 A EP 98108867A EP 98108867 A EP98108867 A EP 98108867A EP 0878829 A3 EP0878829 A3 EP 0878829A3
Authority
EP
European Patent Office
Prior art keywords
discharge lamp
lamp electrode
coating
electrode
graphite particles
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Withdrawn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
EP98108867A
Other languages
German (de)
French (fr)
Other versions
EP0878829A2 (en
Inventor
John T. Jankowski
Brad Ernest
Robert W. Flanagan
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.)
Osram Sylvania Inc
Original Assignee
Osram Sylvania Inc
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 Osram Sylvania Inc filed Critical Osram Sylvania Inc
Publication of EP0878829A2 publication Critical patent/EP0878829A2/en
Publication of EP0878829A3 publication Critical patent/EP0878829A3/en
Withdrawn legal-status Critical Current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
    • H01J61/067—Main electrodes for low-pressure discharge lamps
    • H01J61/0675—Main electrodes for low-pressure discharge lamps characterised by the material of the electrode
    • H01J61/0677—Main electrodes for low-pressure discharge lamps characterised by the material of the electrode characterised by the electron emissive material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/022—Manufacture of electrodes or electrode systems of cold cathodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
    • H01J61/76—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a filling of permanent gas or gases only
    • H01J61/78—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a filling of permanent gas or gases only with cold cathode; with cathode heated only by discharge, e.g. high-tension lamp for advertising

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Discharge Lamp (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

Abstract

A discharge lamp electrode with a conductive coating having a substantial portion of graphite particles is disclosed. The coating has been found to substantially increase starting reliability, to reduce starting voltage and to generally reduce starting time. The coating is formed as mixture of a bonding matrix and graphite particles that is baked to bond it to the electrode.
EP98108867A 1997-05-16 1998-05-15 Discharge lamp electrode Withdrawn EP0878829A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US85725797A 1997-05-16 1997-05-16
US857257 1997-05-16

Publications (2)

Publication Number Publication Date
EP0878829A2 EP0878829A2 (en) 1998-11-18
EP0878829A3 true EP0878829A3 (en) 1999-03-17

Family

ID=25325573

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98108867A Withdrawn EP0878829A3 (en) 1997-05-16 1998-05-15 Discharge lamp electrode

Country Status (3)

Country Link
EP (1) EP0878829A3 (en)
JP (1) JPH10326591A (en)
CA (1) CA2229290A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3833489B2 (en) 2001-03-29 2006-10-11 株式会社東芝 Cold cathode discharge device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1410641A (en) * 1963-10-04 1965-09-10 Philips Nv Porous metal body and its manufacturing process
JPH01225040A (en) * 1988-03-02 1989-09-07 Hitachi Ltd Electron emitting electrode and display device
JPH0377256A (en) * 1989-08-21 1991-04-02 Hitachi Ltd Low pressure discharge lamp
WO1994028571A1 (en) * 1993-06-02 1994-12-08 Microelectronics And Computer Technology Corporation Amorphic diamond film flat field emission cathode
EP0709870A1 (en) * 1994-10-31 1996-05-01 AT&T Corp. Methods and apparatus for making enhanced particulate field emitters and resulting products
EP0741402A2 (en) * 1995-05-02 1996-11-06 Philips Patentverwaltung GmbH Electric discharge tubes or discharge lamps, flat panel display, low-temperature cathode and method for their fabrication

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1410641A (en) * 1963-10-04 1965-09-10 Philips Nv Porous metal body and its manufacturing process
JPH01225040A (en) * 1988-03-02 1989-09-07 Hitachi Ltd Electron emitting electrode and display device
JPH0377256A (en) * 1989-08-21 1991-04-02 Hitachi Ltd Low pressure discharge lamp
WO1994028571A1 (en) * 1993-06-02 1994-12-08 Microelectronics And Computer Technology Corporation Amorphic diamond film flat field emission cathode
EP0709870A1 (en) * 1994-10-31 1996-05-01 AT&T Corp. Methods and apparatus for making enhanced particulate field emitters and resulting products
EP0741402A2 (en) * 1995-05-02 1996-11-06 Philips Patentverwaltung GmbH Electric discharge tubes or discharge lamps, flat panel display, low-temperature cathode and method for their fabrication

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 013, no. 544 (E - 855) 6 December 1989 (1989-12-06) *
PATENT ABSTRACTS OF JAPAN vol. 015, no. 246 (E - 1081) 24 June 1991 (1991-06-24) *

Also Published As

Publication number Publication date
EP0878829A2 (en) 1998-11-18
JPH10326591A (en) 1998-12-08
CA2229290A1 (en) 1998-11-16

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