GB1317661A - Circuit arrangements for dimming discharge lamps - Google Patents

Circuit arrangements for dimming discharge lamps

Info

Publication number
GB1317661A
GB1317661A GB2987970A GB2987970A GB1317661A GB 1317661 A GB1317661 A GB 1317661A GB 2987970 A GB2987970 A GB 2987970A GB 2987970 A GB2987970 A GB 2987970A GB 1317661 A GB1317661 A GB 1317661A
Authority
GB
United Kingdom
Prior art keywords
ballast
discharge lamp
inductors
discharge
discharge lamps
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.)
Expired
Application number
GB2987970A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1317661A publication Critical patent/GB1317661A/en
Expired 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
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/40—Controlling the intensity of light discontinuously
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S315/00—Electric lamp and discharge devices: systems
    • Y10S315/04—Dimming circuit for fluorescent lamps

Abstract

1317661 Gas discharge tube dimmer PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 19 June 1970 [24 June 1969] 29879/70 Heading H2H In a circuit arrangement for the stepwise dimming of parallel connected discharge lamps, each discharge lamp has at least two ballast impedances connected with it, and at least one bridge rectifier associated with one of the ballast impedances. The heater electrodes of low pressure mercury discharge lamp 13, are fed from transformer 10 via secondary windings 11 and 15. The electrode 14 is connected to ballast inductors 16, 18 and 20. Ballast inductors 18 and 20 are connected to bridge rectifiers 17 and 19. Similar connections are made to a second discharge lamp 13<SP>1</SP>. Currents can only flow across the bridge rectifiers 17 and 19, and 17<SP>1</SP> and 19<SP>1</SP> when the appropriate switch 21 or 22 is closed, these switches being effectively connected across the rectifier bridges. In this way the discharge lamp 13 and 13<SP>1</SP> can be dimmed in a stepwise manner. The rectifier bridges having the effect that the two discharge lamps circuits are effectively decoupled so that the failure of one lamp does not affect the other. In a second embodiment the ballast inductors may be all connected in series and the rectifier bridges may be used to short out appropriate ballast inductors.
GB2987970A 1969-06-24 1970-06-19 Circuit arrangements for dimming discharge lamps Expired GB1317661A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6921174A FR2055842A5 (en) 1969-06-24 1969-06-24

Publications (1)

Publication Number Publication Date
GB1317661A true GB1317661A (en) 1973-05-23

Family

ID=9036298

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2987970A Expired GB1317661A (en) 1969-06-24 1970-06-19 Circuit arrangements for dimming discharge lamps

Country Status (5)

Country Link
US (1) US3679935A (en)
DE (1) DE2029050A1 (en)
FR (1) FR2055842A5 (en)
GB (1) GB1317661A (en)
NL (1) NL7009087A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE859304A (en) * 1977-10-03 1978-04-03 Acec LUMINOUS FLOW VARIATION CONTROL INSTALLATION
US4686427A (en) * 1985-08-13 1987-08-11 Magnetek, Inc. Fluorescent lamp dimming switch
US5146139A (en) * 1989-01-23 1992-09-08 Nilssen Ole K Controllable gas discharge lighting system
US5204587A (en) * 1991-02-19 1993-04-20 Magnetek, Inc. Fluorescent lamp power control
KR100986664B1 (en) * 2010-07-05 2010-10-11 이충해 Light emitting apparatus using ac led

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2859387A (en) * 1953-07-30 1958-11-04 Zeiss Ikon Ag Arrangement for simultaneously or alternately operating a plurality of xenon high pressure lamps
DE1169035B (en) * 1961-12-27 1964-04-30 Siemens Ag Switching arrangement for operating fluorescent lamps in two brightness levels, corresponding to full and reduced brightness

Also Published As

Publication number Publication date
NL7009087A (en) 1970-12-29
DE2029050A1 (en) 1971-01-07
US3679935A (en) 1972-07-25
FR2055842A5 (en) 1971-05-14

Similar Documents

Publication Publication Date Title
GB1338852A (en) Lighting fitting
ES8507309A1 (en) Control circuit for gas discharge lamps
GB1477908A (en) High intensity lamp dimming circuit
US3925705A (en) Low-cost power-reducing device for hid lamp
GB1414051A (en) Emergency supply system for arc discharge devices
US2268512A (en) Series lamp circuit
GB1317661A (en) Circuit arrangements for dimming discharge lamps
CA2006280A1 (en) Electronic ballast circuit for discharge lamp
US3890540A (en) Apparatus for operating gaseous discharge lamps on direct current from a source of alternating current
ES273264A1 (en) Ballast apparatus and system for dimming arc discharge lamps
US3463964A (en) Fluorescent lamp-dimming circuit
CA1260998A (en) Adaption circuit for operating a high-pressure discharge lamp
GB1178956A (en) Method for operating fluorescent tubes
ATE40253T1 (en) CIRCUIT ARRANGEMENT FOR AC OPERATION OF HIGH-PRESSURE GAS DISCHARGE LAMPS.
US3040208A (en) Ballast apparatus for gaseous discharge devices
ES267433A1 (en) High frequency lighting systems and ballast circuits therefor
JPS61118997A (en) Lighting matching circuit for high voltage discharge lamp
US4900986A (en) Ballast circuit for starting fluorescent lamps
SU493941A1 (en) Apparatus for supplying gas discharge lamps to AC power
US2300853A (en) Control circuit for gaseous electric discharge lamps
GB755776A (en) Improvements in or relating to electric circuits for starting and operating fluorescent lamps
KR840002304Y1 (en) Lighting device for fluorescent lamp
GB1035787A (en) Improvements in or relating to electric circuit arrangements for operating electric discharge lamps
FR2400818A1 (en) Low pressure sodium vapour discharge lamp control circuit - uses triac whose firing threshold is controlled by firing voltage of diac
GB1095226A (en) Two-lamp mercury ballast

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees