ATE9530T1 - CIRCUIT FOR DISCHARGE LAMPS. - Google Patents

CIRCUIT FOR DISCHARGE LAMPS.

Info

Publication number
ATE9530T1
ATE9530T1 AT81300106T AT81300106T ATE9530T1 AT E9530 T1 ATE9530 T1 AT E9530T1 AT 81300106 T AT81300106 T AT 81300106T AT 81300106 T AT81300106 T AT 81300106T AT E9530 T1 ATE9530 T1 AT E9530T1
Authority
AT
Austria
Prior art keywords
circuit
starter circuit
lamps
thyristor
capacitor
Prior art date
Application number
AT81300106T
Other languages
German (de)
Inventor
John Cyril Pegg
Original Assignee
Thorn Emi Plc
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 Thorn Emi Plc filed Critical Thorn Emi Plc
Application granted granted Critical
Publication of ATE9530T1 publication Critical patent/ATE9530T1/en

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H05B41/042—Starting switches using semiconductor devices
    • H05B41/044—Starting switches using semiconductor devices for lamp provided with pre-heating electrodes
    • H05B41/046—Starting switches using semiconductor devices for lamp provided with pre-heating electrodes using controlled semiconductor devices

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

Two (or more) gas discharge lamps (10, 110), each in series with a choke ballast (18, 118) across A.C. supply terminals (16a, 16a) are started by a single starter circuit (70), the lamps being connected to the starter circuit through respective rectifying diodes (150, 152). The starter circuit (70) operates with rectified half-cycles of the A.C. supply, and resistors (154, 156) balance the cathode heating currents between the two lamps. Preferably the starter circuit is rendered ineffective in a failed-lamp condition, and to this end (per DE-OS 28 16 415) it includes a thyristor (26) triggered by a control circuit which includes a capacitor (32) effective to increase the instantaneous applied voltage which is required to trigger the thyristor with successive cycles of the applied voltage after initial switch-on of the circuit. A Zener diode (30) is in series with the capacitor (32).
AT81300106T 1980-02-08 1981-01-12 CIRCUIT FOR DISCHARGE LAMPS. ATE9530T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8004226A GB2069779A (en) 1980-02-08 1980-02-08 Discharge lamp circuit
EP81300106A EP0034401B1 (en) 1980-02-08 1981-01-12 Discharge lamp circuit

Publications (1)

Publication Number Publication Date
ATE9530T1 true ATE9530T1 (en) 1984-10-15

Family

ID=10511201

Family Applications (1)

Application Number Title Priority Date Filing Date
AT81300106T ATE9530T1 (en) 1980-02-08 1981-01-12 CIRCUIT FOR DISCHARGE LAMPS.

Country Status (6)

Country Link
EP (1) EP0034401B1 (en)
AT (1) ATE9530T1 (en)
AU (1) AU6628381A (en)
DE (1) DE3166098D1 (en)
GB (1) GB2069779A (en)
NZ (1) NZ196081A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4488092A (en) * 1981-07-21 1984-12-11 Toichi Chikuma Illumination mode selecting device for illumination lamp
GB8305878D0 (en) * 1983-03-03 1983-04-07 Texas Instruments Ltd Starter circuit
GB2204728A (en) * 1987-05-15 1988-11-16 British Aerospace Gas discharge driver circuit
DE3938677A1 (en) * 1989-11-22 1991-05-23 Trilux Lenze Gmbh & Co Kg Fluorescent lamp starter circuit - allows several lamps to be operated from single unit
DE3938676C1 (en) * 1989-11-22 1991-06-06 Trilux-Lenze Gmbh + Co Kg, 5760 Arnsberg, De
GB2415860B (en) * 2004-06-30 2007-04-18 Nokia Corp A method of providing a radio service at a remote terminal

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4079292A (en) * 1975-01-09 1978-03-14 New Nippon Electric Company, Ltd. Arc discharge sustaining circuit system for a discharge lamp

Also Published As

Publication number Publication date
EP0034401A3 (en) 1981-09-02
NZ196081A (en) 1983-11-30
EP0034401A2 (en) 1981-08-26
GB2069779A (en) 1981-08-26
AU6628381A (en) 1981-08-13
EP0034401B1 (en) 1984-09-19
DE3166098D1 (en) 1984-10-25

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Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
REN Ceased due to non-payment of the annual fee