EP2388799A3 - Single-ended short arc lamp of low colour temperature with reduced sodium loss - Google Patents

Single-ended short arc lamp of low colour temperature with reduced sodium loss Download PDF

Info

Publication number
EP2388799A3
EP2388799A3 EP11163623.9A EP11163623A EP2388799A3 EP 2388799 A3 EP2388799 A3 EP 2388799A3 EP 11163623 A EP11163623 A EP 11163623A EP 2388799 A3 EP2388799 A3 EP 2388799A3
Authority
EP
European Patent Office
Prior art keywords
colour temperature
low colour
short arc
arc tube
arc lamp
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Withdrawn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
EP11163623.9A
Other languages
German (de)
French (fr)
Other versions
EP2388799A2 (en
Inventor
James Hooker
Lode Derhaeg
Marc Adolf
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.)
Flowil International Lighting Holding BV
Original Assignee
Flowil International Lighting Holding BV
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 Flowil International Lighting Holding BV filed Critical Flowil International Lighting Holding BV
Publication of EP2388799A2 publication Critical patent/EP2388799A2/en
Publication of EP2388799A3 publication Critical patent/EP2388799A3/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Withdrawn legal-status Critical Current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
    • H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
    • H01J61/827—Metal halide arc lamps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/46—Leading-in conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
    • H01J61/366—Seals for leading-in conductors
    • H01J61/368—Pinched seals or analogous seals

Abstract

The present disclosure provides a single ended short arc metal halide lamp without outer jacket comprising an arc tube (101) equipped with a pair of tungsten electrodes (102), wherein the arc tube is filled with sodium-bearing metal halide chemistry and an electrical return lead (108) is contiguously juxtaposed alongside the arc tube. The return lead (108) is completely or partially embedded in a fused glass sleeve (107), thereby interrupting the cycle of sodium loss and leading to low colour temperature of the lamp, which is stable during life.
EP11163623.9A 2010-04-26 2011-04-26 Single-ended short arc lamp of low colour temperature with reduced sodium loss Withdrawn EP2388799A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IN997DE2010 2010-04-26

Publications (2)

Publication Number Publication Date
EP2388799A2 EP2388799A2 (en) 2011-11-23
EP2388799A3 true EP2388799A3 (en) 2013-12-18

Family

ID=44225791

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11163623.9A Withdrawn EP2388799A3 (en) 2010-04-26 2011-04-26 Single-ended short arc lamp of low colour temperature with reduced sodium loss

Country Status (1)

Country Link
EP (1) EP2388799A3 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5032758A (en) * 1989-09-28 1991-07-16 General Electric Company Precision tubulation for self mounting lamp
US5130602A (en) * 1989-02-01 1992-07-14 U.S. Philips Corporation High-pressure gas discharge lamp
JP2000223066A (en) * 1999-01-29 2000-08-11 Toshiba Lighting & Technology Corp Metal halide lamp and lighting system
EP2375439A2 (en) * 2010-04-08 2011-10-12 Flowil International Lighting (HOLDING) B.V. Short arc dimmable hid lamp with constant colour during dimming

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4888517A (en) 1987-08-28 1989-12-19 Gte Products Corporation Double-enveloped lamp having a shield surrounding a light-source capsule within a thick-walled outer envelope
US6741013B2 (en) 2000-12-13 2004-05-25 General Electric Company Shrouded electric lamp having functionally distinguishable center supports
US20090230864A1 (en) 2006-05-08 2009-09-17 Koninklijke Philips Electronics N.V. Compact hid arc lamp having shrouded arc tube and helical lead wire
US20090256460A1 (en) 2008-04-14 2009-10-15 General Electric Company Method for preventing or reducing helium leakage through metal halide lamp envelopes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5130602A (en) * 1989-02-01 1992-07-14 U.S. Philips Corporation High-pressure gas discharge lamp
US5032758A (en) * 1989-09-28 1991-07-16 General Electric Company Precision tubulation for self mounting lamp
JP2000223066A (en) * 1999-01-29 2000-08-11 Toshiba Lighting & Technology Corp Metal halide lamp and lighting system
EP2375439A2 (en) * 2010-04-08 2011-10-12 Flowil International Lighting (HOLDING) B.V. Short arc dimmable hid lamp with constant colour during dimming

Also Published As

Publication number Publication date
EP2388799A2 (en) 2011-11-23

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