GB1308133A - Gas discharge tube power supplies - Google Patents

Gas discharge tube power supplies

Info

Publication number
GB1308133A
GB1308133A GB1308133DA GB1308133A GB 1308133 A GB1308133 A GB 1308133A GB 1308133D A GB1308133D A GB 1308133DA GB 1308133 A GB1308133 A GB 1308133A
Authority
GB
United Kingdom
Prior art keywords
lamp
gas discharge
discharge tube
switch
light output
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
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.)
Littlejohn Electronics Ltd H P
Original Assignee
Littlejohn Electronics Ltd H P
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 Littlejohn Electronics Ltd H P filed Critical Littlejohn Electronics Ltd H P
Publication of GB1308133A publication Critical patent/GB1308133A/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
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor

Landscapes

  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)

Abstract

1308133 Automatic control of current and light intensity H P LITTLEJOHN (ELECTRONICS) Ltd 28 April 1970 [20 Feb 1969] 9336/69 Heading G3R [Also in Division H2] A power supply system for a gas discharge tube particularly a xenon lamp XL comprises A.C. input terminals A, B to which are connected a series circuit including a variable firing angle A. C. switch e.g. a triac SW, a saturable choke SC and the lamp. An energy storage capacitor C6 generates high voltage trigger pulses in the choke SC to start the discharge in the lamp. To prevent fluctuations of the mains supply altering the light output of the lamp a current transformer CTR supplies regulating signals to a circuit Fc which controls the firing angle of the switch and therefore also the light output of the lamp. Voltage transients and r.f. interference are suppressed by a filter circuit C2-C4, C6, L3, L4. The current transformer may be replaced by a photo-electric sensing device.
GB1308133D 1969-02-20 1969-02-20 Gas discharge tube power supplies Expired GB1308133A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB933669 1969-02-20

Publications (1)

Publication Number Publication Date
GB1308133A true GB1308133A (en) 1973-02-21

Family

ID=9870001

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1308133D Expired GB1308133A (en) 1969-02-20 1969-02-20 Gas discharge tube power supplies

Country Status (1)

Country Link
GB (1) GB1308133A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0458338A1 (en) * 1990-05-25 1991-11-27 Gte Products Corporation Method and circuit of improved HID lamp starting
EP1107651A2 (en) * 1999-12-10 2001-06-13 Otto Diez Elektromaschinenbau Device with a discharge lamp
WO2014176615A1 (en) * 2013-05-02 2014-11-06 Tridonic Gmbh & Co Kg Operating device for luminous elements
CN109755932A (en) * 2017-11-06 2019-05-14 东莞市阿甘半导体有限公司 A kind of AC power source surge protective device and electronic equipment

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0458338A1 (en) * 1990-05-25 1991-11-27 Gte Products Corporation Method and circuit of improved HID lamp starting
EP1107651A2 (en) * 1999-12-10 2001-06-13 Otto Diez Elektromaschinenbau Device with a discharge lamp
EP1107651A3 (en) * 1999-12-10 2004-12-08 Otto Diez Elektromaschinenbau Device with a discharge lamp
WO2014176615A1 (en) * 2013-05-02 2014-11-06 Tridonic Gmbh & Co Kg Operating device for luminous elements
US9532429B2 (en) 2013-05-02 2016-12-27 Tridonic Gmbh & Co Kg Operating device for luminous elements
CN109755932A (en) * 2017-11-06 2019-05-14 东莞市阿甘半导体有限公司 A kind of AC power source surge protective device and electronic equipment

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees