FR2255777A1 - Firing system for discharge tubes - has common point of RC network connected to preheated electrode by resistor - Google Patents

Firing system for discharge tubes - has common point of RC network connected to preheated electrode by resistor

Info

Publication number
FR2255777A1
FR2255777A1 FR7346110A FR7346110A FR2255777A1 FR 2255777 A1 FR2255777 A1 FR 2255777A1 FR 7346110 A FR7346110 A FR 7346110A FR 7346110 A FR7346110 A FR 7346110A FR 2255777 A1 FR2255777 A1 FR 2255777A1
Authority
FR
France
Prior art keywords
common point
electrodes
discharge tubes
resistor
series
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
FR7346110A
Other languages
French (fr)
Other versions
FR2255777B1 (en
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.)
Radiotechnique Compelec RTC SA
Original Assignee
Radiotechnique Compelec RTC SA
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 Radiotechnique Compelec RTC SA filed Critical Radiotechnique Compelec RTC SA
Priority to FR7346110A priority Critical patent/FR2255777A1/en
Publication of FR2255777A1 publication Critical patent/FR2255777A1/en
Application granted granted Critical
Publication of FR2255777B1 publication Critical patent/FR2255777B1/fr
Granted legal-status Critical Current

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

Electronic starter (12) for discharge tubes having preheated electrodes is fed directly from an a.c. source through a series ballast impedance. The starter (12) temporarily electrically connects the electrodes of the discharge tube and has two terminals connecting with the electrodes and a bridge rectifier unit (13, 14, 15, 16) whose output terminals are connected to two conductors fed with continuous current pulses from an electronic circuit employing a thyristor (21) and a network having a series connected resistance (24) and a capacitor (25) whose common point is connected to the trigger electrode by a diac (23). The common point of the series RC (24, 25) network is connected via a second resistance (26, 27) to the ends of one of the preheated electrodes of the discharge tube.
FR7346110A 1973-12-21 1973-12-21 Firing system for discharge tubes - has common point of RC network connected to preheated electrode by resistor Granted FR2255777A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7346110A FR2255777A1 (en) 1973-12-21 1973-12-21 Firing system for discharge tubes - has common point of RC network connected to preheated electrode by resistor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7346110A FR2255777A1 (en) 1973-12-21 1973-12-21 Firing system for discharge tubes - has common point of RC network connected to preheated electrode by resistor

Publications (2)

Publication Number Publication Date
FR2255777A1 true FR2255777A1 (en) 1975-07-18
FR2255777B1 FR2255777B1 (en) 1976-04-30

Family

ID=9129638

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7346110A Granted FR2255777A1 (en) 1973-12-21 1973-12-21 Firing system for discharge tubes - has common point of RC network connected to preheated electrode by resistor

Country Status (1)

Country Link
FR (1) FR2255777A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4177403A (en) * 1977-01-31 1979-12-04 U.S. Philips Corporation Electronic starter for igniting a discharge lamp
FR2430162A1 (en) * 1978-06-27 1980-01-25 Philips Nv ELECTRIC DEVICE PROVIDED WITH AT LEAST ONE GAS AND / OR VAPOR DISCHARGE TUBE
FR2441989A1 (en) * 1978-11-17 1980-06-13 Lampes Sa Fluorescent lamp starter circuit - alternately heats lamp electrodes and applies firing voltage and is inoperative when lamp fires
FR2458200A1 (en) * 1979-05-31 1980-12-26 Silicium Semiconducteur Ssc Fluorescent lamp operating circuit giving long working life - has capacitor short circuited during filament heating and switched for firing lamp

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4177403A (en) * 1977-01-31 1979-12-04 U.S. Philips Corporation Electronic starter for igniting a discharge lamp
FR2430162A1 (en) * 1978-06-27 1980-01-25 Philips Nv ELECTRIC DEVICE PROVIDED WITH AT LEAST ONE GAS AND / OR VAPOR DISCHARGE TUBE
US4253043A (en) * 1978-06-27 1981-02-24 U.S. Philips Corporation Electric arrangement including at least one gas and/or vapor discharge tube
FR2441989A1 (en) * 1978-11-17 1980-06-13 Lampes Sa Fluorescent lamp starter circuit - alternately heats lamp electrodes and applies firing voltage and is inoperative when lamp fires
FR2458200A1 (en) * 1979-05-31 1980-12-26 Silicium Semiconducteur Ssc Fluorescent lamp operating circuit giving long working life - has capacitor short circuited during filament heating and switched for firing lamp

Also Published As

Publication number Publication date
FR2255777B1 (en) 1976-04-30

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Legal Events

Date Code Title Description
ST Notification of lapse