EP0377899A3 - Lighting discharge lamp - Google Patents

Lighting discharge lamp Download PDF

Info

Publication number
EP0377899A3
EP0377899A3 EP19890124095 EP89124095A EP0377899A3 EP 0377899 A3 EP0377899 A3 EP 0377899A3 EP 19890124095 EP19890124095 EP 19890124095 EP 89124095 A EP89124095 A EP 89124095A EP 0377899 A3 EP0377899 A3 EP 0377899A3
Authority
EP
European Patent Office
Prior art keywords
discharge lamp
lighting discharge
lutetium
mol
light
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Withdrawn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
EP19890124095
Other languages
German (de)
French (fr)
Other versions
EP0377899A2 (en
Inventor
Mitsuo Narita
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.)
Ushio Denki KK
Original Assignee
Ushio Denki KK
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 Ushio Denki KK filed Critical Ushio Denki KK
Publication of EP0377899A2 publication Critical patent/EP0377899A2/en
Publication of EP0377899A3 publication Critical patent/EP0377899A3/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Withdrawn legal-status Critical Current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
    • H01J61/84—Lamps with discharge constricted by high pressure
    • H01J61/86—Lamps with discharge constricted by high pressure with discharge additionally constricted by close spacing of electrodes, e.g. for optical projection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature

Abstract

A lighting discharge lamp includes a light-­ emitting tube in which a halogen and lutetium are sealed together with mercury and a rare gas. The sealed amount of lutetium falls in a range of from 2 x 10⁻⁷ mol/cc to 2 x 10⁻⁵ mol/cc. The premature clouding of the light-­ emitting tube can be avoided to enhance its luminous flux utilization and the variations of its color temperature depending on those of supply power for operation can be reduced to a small extent.
EP19890124095 1989-01-12 1989-12-28 Lighting discharge lamp Withdrawn EP0377899A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3670/89 1989-01-12
JP367089A JPH02186552A (en) 1989-01-12 1989-01-12 Electric discharge lamp for lighting

Publications (2)

Publication Number Publication Date
EP0377899A2 EP0377899A2 (en) 1990-07-18
EP0377899A3 true EP0377899A3 (en) 1991-05-15

Family

ID=11563864

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890124095 Withdrawn EP0377899A3 (en) 1989-01-12 1989-12-28 Lighting discharge lamp

Country Status (2)

Country Link
EP (1) EP0377899A3 (en)
JP (1) JPH02186552A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1264193C (en) 1999-12-09 2006-07-12 皇家菲利浦电子有限公司 Metal halide lamp
DE102006025947A1 (en) * 2006-06-02 2007-12-06 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Metal halide filling for a high pressure electric discharge lamp and associated lamp

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3842307A (en) * 1971-02-11 1974-10-15 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh High pressure mercury vapor discharge lamp with metal halide additives
GB2053562A (en) * 1979-06-29 1981-02-04 Narva Veb Discharge Lamp
EP0049545A1 (en) * 1980-10-02 1982-04-14 Koninklijke Philips Electronics N.V. High-pressure mercury vapour discharge lamp
EP0389907A2 (en) * 1989-03-29 1990-10-03 Ushio Denki Kabushiki Kaisha Lighting lamp

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3842307A (en) * 1971-02-11 1974-10-15 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh High pressure mercury vapor discharge lamp with metal halide additives
GB2053562A (en) * 1979-06-29 1981-02-04 Narva Veb Discharge Lamp
EP0049545A1 (en) * 1980-10-02 1982-04-14 Koninklijke Philips Electronics N.V. High-pressure mercury vapour discharge lamp
EP0389907A2 (en) * 1989-03-29 1990-10-03 Ushio Denki Kabushiki Kaisha Lighting lamp

Also Published As

Publication number Publication date
JPH02186552A (en) 1990-07-20
EP0377899A2 (en) 1990-07-18

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