GB1331821A - Discharge lamp supply arrangement - Google Patents

Discharge lamp supply arrangement

Info

Publication number
GB1331821A
GB1331821A GB5360471A GB5360471A GB1331821A GB 1331821 A GB1331821 A GB 1331821A GB 5360471 A GB5360471 A GB 5360471A GB 5360471 A GB5360471 A GB 5360471A GB 1331821 A GB1331821 A GB 1331821A
Authority
GB
United Kingdom
Prior art keywords
lamp
discharge
switch
resistance
ignition
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
GB5360471A
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 GB1331821A publication Critical patent/GB1331821A/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
    • H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
    • H05B41/18—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having a starting switch
    • 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
    • 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
    • Y10S315/05—Starting and operating circuit for fluorescent lamp

Landscapes

  • Discharge Lamps And Accessories Thereof (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

1331821 Discharge lamp supply PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 18 Nov 1971 [21 Nov 1970] 53604/71 Heading H2H A starting and operating circuit for a discharge lamp 7 which may be a low pressure mercury vapour lamp having preheated electrodes 8, 9 comprises a capacitor 4 and an inductance 3 in series with the lamp and with a branch comprising a diode 5 and a resistor 6 having a positive temperature characteristic. The lamp is further shunted by a glow discharge switch 10 and in operation, after the first half cycle of a supply connected at 1, 2, capacitor 4 is charged to double the peak input voltage which causes the glow at 10 to ignite. At this time the current in the branch 5, 6 is small and merely balances the discharging effect of the glow discharge. Heat produced by this discharge causes bimetal electrodes 11, 12 in the switch 10 to close together and produce a preheating current through the electrodes. The discharge is terminated upon switch closure and the electrodes cool and come apart, whereupon a pulse of high voltage inites the lamp. The increased current through the lamp and diode branch after ignition causes the resistance to heat up and attach a value such that its resistance is large to effectively render the diode branch inoperative. In a modification, two or more lamps each shunted by a glow switch are employed in series. Component values are chosen such that the resistance 6 prior to lamp ignition has a value not exceeding twice that of the operating value of the lamp, and about 20 times this resistance after lamp ignition. The ignition voltage of the discharge switch should be more than 90% of the supply R.M.S. voltage.
GB5360471A 1970-11-21 1971-11-18 Discharge lamp supply arrangement Expired GB1331821A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7017064A NL7017064A (en) 1970-11-21 1970-11-21

Publications (1)

Publication Number Publication Date
GB1331821A true GB1331821A (en) 1973-09-26

Family

ID=19811617

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5360471A Expired GB1331821A (en) 1970-11-21 1971-11-18 Discharge lamp supply arrangement

Country Status (9)

Country Link
US (1) US3740609A (en)
JP (1) JPS5014469B1 (en)
AU (1) AU458022B2 (en)
BE (1) BE775614A (en)
CA (1) CA997411A (en)
ES (1) ES397181A1 (en)
FR (1) FR2115886A5 (en)
GB (1) GB1331821A (en)
NL (1) NL7017064A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7611934U1 (en) * 1976-04-15 1977-01-13 N.V. Philips' Gloeilampenfabrieken, Eindhoven (Niederlande) DISCHARGE LAMP
US5510681A (en) * 1978-03-20 1996-04-23 Nilssen; Ole K. Operating circuit for gas discharge lamps
US4378514A (en) * 1980-10-27 1983-03-29 General Electric Company Starting and operating circuit for gaseous discharge lamps
US4355265A (en) * 1980-12-15 1982-10-19 Gte Products Corporation Discharge lamp starting and operating circuit
JPS57118396A (en) * 1981-01-14 1982-07-23 Toshiba Electric Equip Device for firing discharge lamp
EP0096105A3 (en) * 1981-10-01 1984-07-18 Fahir Gülüm Instant start solid state ballast for fluorescent and gas-dis charge lamps
US4437042A (en) 1981-12-10 1984-03-13 General Electric Company Starting and operating circuit for gaseous discharge lamps
NL8400924A (en) * 1984-03-23 1985-10-16 Philips Nv DC AC CONVERTER FOR IGNITION AND POWERING A GAS AND / OR VAPOR DISCHARGE TUBE.
SE516389C2 (en) * 1997-07-02 2002-01-08 Ignitor=free circuit for tube lighting unit e.g. sodium or fluorescent - has discharge tube in parallel with resistor and diode, and in series with inductor and capacitor paralleled by resistor.
CN1849694B (en) * 2003-07-29 2010-05-12 皇家飞利浦电子股份有限公司 Low-pressure mercury vapor discharge lamp having determined probability of failure

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6409309A (en) * 1964-08-13 1966-02-14

Also Published As

Publication number Publication date
FR2115886A5 (en) 1972-07-07
DE2155488A1 (en) 1972-05-31
AU458022B2 (en) 1975-02-13
BE775614A (en) 1972-05-19
DE2155488B2 (en) 1976-08-05
CA997411A (en) 1976-09-21
ES397181A1 (en) 1975-03-16
JPS5014469B1 (en) 1975-05-28
US3740609A (en) 1973-06-19
AU3579071A (en) 1973-05-24
NL7017064A (en) 1972-05-24

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee