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 resistorInfo
- 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
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.
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)
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 |
-
1973
- 1973-12-21 FR FR7346110A patent/FR2255777A1/en active Granted
Cited By (5)
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 |