EP0359200A3 - Metal halide discharge lamp with improved color rendering properties - Google Patents

Metal halide discharge lamp with improved color rendering properties Download PDF

Info

Publication number
EP0359200A3
EP0359200A3 EP19890116864 EP89116864A EP0359200A3 EP 0359200 A3 EP0359200 A3 EP 0359200A3 EP 19890116864 EP19890116864 EP 19890116864 EP 89116864 A EP89116864 A EP 89116864A EP 0359200 A3 EP0359200 A3 EP 0359200A3
Authority
EP
European Patent Office
Prior art keywords
metal halide
arc tube
glass envelope
discharge lamp
halide discharge
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
EP19890116864
Other languages
German (de)
French (fr)
Other versions
EP0359200A2 (en
EP0359200B1 (en
Inventor
Zeya K. Krasko
William M. Keeffe
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
GTE Products 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
Application filed by GTE Products Corp filed Critical GTE Products Corp
Publication of EP0359200A2 publication Critical patent/EP0359200A2/en
Publication of EP0359200A3 publication Critical patent/EP0359200A3/en
Application granted granted Critical
Publication of EP0359200B1 publication Critical patent/EP0359200B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/34—Double-wall vessels or containers

Landscapes

  • Discharge Lamp (AREA)

Abstract

A low wattage metal halide lamp having improved CRI is disclosed. The low wattage metal halide discharge lamp of the present invention comprises an outer sealed glass envelope; a pair of electrical conductors sealed into and passing through the glass envelope; an arc tube disposed within the outer glass envelope, the arc tube including a pair of spaced electrodes therein with the electrodes being electrically connected to the electrical conductors such that one electrode is electrically connected to one electrical conductor; a chemical fill disposed within the arc tube, the chemical fill comprising mercury, scandium metal, sodium iodide, scandium iodide, lithium iodide, and a starting gas; and a support structure disposed within the outer glass envelope to support the arc tube therein, the support structure (12) being electrically isolated from the electrical circuit of the lamp.
EP19890116864 1988-09-12 1989-09-12 Metal halide discharge lamp with improved color rendering properties Expired - Lifetime EP0359200B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US24337088A 1988-09-12 1988-09-12
US243370 1988-09-12

Publications (3)

Publication Number Publication Date
EP0359200A2 EP0359200A2 (en) 1990-03-21
EP0359200A3 true EP0359200A3 (en) 1991-05-08
EP0359200B1 EP0359200B1 (en) 1994-06-22

Family

ID=22918490

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890116864 Expired - Lifetime EP0359200B1 (en) 1988-09-12 1989-09-12 Metal halide discharge lamp with improved color rendering properties

Country Status (4)

Country Link
EP (1) EP0359200B1 (en)
JP (1) JPH02177245A (en)
CA (1) CA1324633C (en)
DE (1) DE68916346T2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4961019A (en) * 1988-10-14 1990-10-02 Gte Products Corporation Metal halide lamp assembly
US5270608A (en) * 1991-10-31 1993-12-14 Williamson Glen P Metal halide arc discharge lamp assembly
CA2101516A1 (en) * 1992-07-29 1994-01-30 Zeya K. Krasko Metal halide lamp
US5457354A (en) * 1994-09-26 1995-10-10 Osram Sylvania Inc. Lamp with improved mount for light-source capsule
EP0784334B1 (en) * 1996-01-11 2000-05-03 Osram Sylvania Inc. Metal halide lamp
US5694002A (en) * 1996-05-08 1997-12-02 Osram Sylvania Inc. Metal halide lamp with improved color characteristics
US7388333B2 (en) * 2003-10-10 2008-06-17 Koninklijke Philips Electronics, N.V. High pressure discharge lamp having emission matching an absorption spectrum of green plant

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3979624A (en) * 1975-04-29 1976-09-07 Westinghouse Electric Corporation High-efficiency discharge lamp which incorporates a small molar excess of alkali metal halide as compared to scandium halide
GB1533345A (en) * 1977-05-12 1978-11-22 Gen Electric Co Ltd High pressure electric discharge lamps
EP0134426A1 (en) * 1983-06-09 1985-03-20 GTE Products Corporation Single-ended metal halide discharge lamp with minimal colour separation
EP0173235A2 (en) * 1984-08-20 1986-03-05 GTE Products Corporation Low wattage metal halide lamp
EP0210626A2 (en) * 1985-08-01 1987-02-04 General Electric Company Metallic halide electric discharge lamps

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3979624A (en) * 1975-04-29 1976-09-07 Westinghouse Electric Corporation High-efficiency discharge lamp which incorporates a small molar excess of alkali metal halide as compared to scandium halide
GB1533345A (en) * 1977-05-12 1978-11-22 Gen Electric Co Ltd High pressure electric discharge lamps
EP0134426A1 (en) * 1983-06-09 1985-03-20 GTE Products Corporation Single-ended metal halide discharge lamp with minimal colour separation
EP0173235A2 (en) * 1984-08-20 1986-03-05 GTE Products Corporation Low wattage metal halide lamp
EP0210626A2 (en) * 1985-08-01 1987-02-04 General Electric Company Metallic halide electric discharge lamps

Also Published As

Publication number Publication date
CA1324633C (en) 1993-11-23
EP0359200A2 (en) 1990-03-21
JPH02177245A (en) 1990-07-10
DE68916346D1 (en) 1994-07-28
EP0359200B1 (en) 1994-06-22
DE68916346T2 (en) 1995-02-16

Similar Documents

Publication Publication Date Title
EP1550147B1 (en) Mercury free metal halide lamp
EP0313027A3 (en) Arc discharge lamp with ultraviolet radiation starting source
US4475061A (en) High-pressure discharge lamp current supply member and mounting seal construction
US5708328A (en) Universal burn metal halide lamp
CA1302476C (en) Arc discharge lamp with electrodeless ultraviolet radiation starting source
GB1485459A (en) Ceramic envelope lamp
US4355261A (en) Discharge lamp with integral starter
US4963790A (en) Low wattage metal halide discharge lamp
US4437039A (en) Starting arrangement for high-intensity-discharge sodium lamp
CA2256962A1 (en) Starting aid for metal halide lamp
EP0359200A3 (en) Metal halide discharge lamp with improved color rendering properties
US5838104A (en) Shield for high pressure discharge lamps
US3982154A (en) Arc discharge lamp construction for starter electrode voltage doubling
US4061939A (en) Low noise sodium vapor lamp for sonic pulse operation
US4625141A (en) Low wattage metal halide discharge lamp electrically biased to reduce sodium loss
CA1176687A (en) Bi pin base for single ended discharge lamp
US5334906A (en) Metal halide arc discharge lamp having short arc length
GB1531280A (en) Metal halide lamps
EP0156385A3 (en) Electrode alignment and capsule design for single-ended low wattage metal halide laps
US4205258A (en) Internal shorting fuse for a high-intensity discharge lamp
EP0009970A1 (en) High-intensity discharge sodium lamps
EP0381279A1 (en) High-pressure gas discharge lamp
GB1337134A (en) Metal halide lamp
EP0119082B1 (en) Unsaturated vapor high pressure sodium lamp including getter
EP0184217B1 (en) Low pressure arc discharge tube having increased voltage

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19891009

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): BE DE FR GB NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): BE DE FR GB NL

17Q First examination report despatched

Effective date: 19930721

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE FR GB NL

ET Fr: translation filed
REF Corresponds to:

Ref document number: 68916346

Country of ref document: DE

Date of ref document: 19940728

NLT1 Nl: modifications of names registered in virtue of documents presented to the patent office pursuant to art. 16 a, paragraph 1

Owner name: OSRAM SYLVANIA INC. TE DANVERS, MASSACHUSETTS, VER

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20030924

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20030926

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20030930

Year of fee payment: 15

Ref country code: FR

Payment date: 20030930

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20031127

Year of fee payment: 15

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040912

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040930

BERE Be: lapsed

Owner name: *GTE PRODUCTS CORP.

Effective date: 20040930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050401

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050401

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20040912

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050531

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20050401

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

BERE Be: lapsed

Owner name: *GTE PRODUCTS CORP.

Effective date: 20040930