JPS6450358A - Extra-high pressure mercury lamp - Google Patents

Extra-high pressure mercury lamp

Info

Publication number
JPS6450358A
JPS6450358A JP20628187A JP20628187A JPS6450358A JP S6450358 A JPS6450358 A JP S6450358A JP 20628187 A JP20628187 A JP 20628187A JP 20628187 A JP20628187 A JP 20628187A JP S6450358 A JPS6450358 A JP S6450358A
Authority
JP
Japan
Prior art keywords
electrode
tip
diameter
electron emitting
emitting side
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.)
Granted
Application number
JP20628187A
Other languages
Japanese (ja)
Other versions
JP2781555B2 (en
Inventor
Takashi Fujimura
Nobuyasu Hayashi
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP62206281A priority Critical patent/JP2781555B2/en
Publication of JPS6450358A publication Critical patent/JPS6450358A/en
Application granted granted Critical
Publication of JP2781555B2 publication Critical patent/JP2781555B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Discharge Lamp (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

PURPOSE:To obtain an extra-high pressure mercury lamp which is small in deterioration of an electrode, in particular, electrode on the electron emitting side and long in life by setting electrode diameter of an electron emitting side electrode, radius of curvature of its electrode tip, electrode diameter of an opposed electrode and its electrode tip diameter in the specific relation with each other, and specifying current load factors of the electron emitting side electrode, the electrode tip and the tip electrode of opposed electrode, respectively. CONSTITUTION:Provided that the electrode diameter of an electron emitting side electrode is c, the radius of curvature of its tip electrode is r, the electrode diameter of an opposed electrode is d and the diameter of its tip electrode is e, they are set in the relation of 1.5.c<=d<=3.c, c/2<=e<=c, d/4<=e<=d/2. Further, provided that load current which flows between these opposed electrodes is I, the current load factor of the electron emitting side electrode is je1, the current load factor of its electrode tip is je2, and the current load factor of the tip electrode of the opposed electrode is je3, they are set in the relation of je1=I/pid<4>/4<=3X10<2>A/cm<2>, je2=I/pir<2=2X10<4>A/cm<2>, je3=I/piA<2>/4<=1X10<3>A/cm2.
JP62206281A 1987-08-21 1987-08-21 Ultra high pressure mercury lamp Expired - Fee Related JP2781555B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62206281A JP2781555B2 (en) 1987-08-21 1987-08-21 Ultra high pressure mercury lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62206281A JP2781555B2 (en) 1987-08-21 1987-08-21 Ultra high pressure mercury lamp

Publications (2)

Publication Number Publication Date
JPS6450358A true JPS6450358A (en) 1989-02-27
JP2781555B2 JP2781555B2 (en) 1998-07-30

Family

ID=16520715

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62206281A Expired - Fee Related JP2781555B2 (en) 1987-08-21 1987-08-21 Ultra high pressure mercury lamp

Country Status (1)

Country Link
JP (1) JP2781555B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003514351A (en) * 1999-11-11 2003-04-15 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ High pressure discharge lamp
WO2009121400A1 (en) * 2008-04-01 2009-10-08 Osram Gesellschaft mit beschränkter Haftung Method for producing a high-pressure discharge lamp, method for producing light using a high-pressure discharge lamp and digital video projector
JP2011086605A (en) * 2009-09-15 2011-04-28 Ushio Inc Short arc type discharge lamp

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49119481A (en) * 1973-03-16 1974-11-14
JPS50110576U (en) * 1974-02-18 1975-09-09
JPS54108478A (en) * 1978-02-14 1979-08-25 Ushio Electric Inc Printing or transcribing method of semiconductor and discharge lamp suitable for printing or transcription

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49119481A (en) * 1973-03-16 1974-11-14
JPS50110576U (en) * 1974-02-18 1975-09-09
JPS54108478A (en) * 1978-02-14 1979-08-25 Ushio Electric Inc Printing or transcribing method of semiconductor and discharge lamp suitable for printing or transcription

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003514351A (en) * 1999-11-11 2003-04-15 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ High pressure discharge lamp
WO2009121400A1 (en) * 2008-04-01 2009-10-08 Osram Gesellschaft mit beschränkter Haftung Method for producing a high-pressure discharge lamp, method for producing light using a high-pressure discharge lamp and digital video projector
JP2011517018A (en) * 2008-04-01 2011-05-26 オスラム ゲゼルシャフト ミット ベシュレンクテル ハフツング Method for manufacturing a high-pressure discharge lamp, method for supplying light by a high-pressure discharge lamp, and digital video projector
JP2011086605A (en) * 2009-09-15 2011-04-28 Ushio Inc Short arc type discharge lamp

Also Published As

Publication number Publication date
JP2781555B2 (en) 1998-07-30

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees