DE3569864D1 - Brightness control device for a fluorescent lamp - Google Patents

Brightness control device for a fluorescent lamp

Info

Publication number
DE3569864D1
DE3569864D1 DE8585810080T DE3569864T DE3569864D1 DE 3569864 D1 DE3569864 D1 DE 3569864D1 DE 8585810080 T DE8585810080 T DE 8585810080T DE 3569864 T DE3569864 T DE 3569864T DE 3569864 D1 DE3569864 D1 DE 3569864D1
Authority
DE
Germany
Prior art keywords
fluorescent lamp
voltage
alternating
current
trigger circuit
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
DE8585810080T
Other languages
German (de)
Inventor
Fredy Kamber
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.)
STARKSTROM-ELEKTRONIK AG, SPREITENBACH, CH
Original Assignee
STARKSTROM ELEKTRONIK AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4246770&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3569864(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by STARKSTROM ELEKTRONIK AG filed Critical STARKSTROM ELEKTRONIK AG
Application granted granted Critical
Publication of DE3569864D1 publication Critical patent/DE3569864D1/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
    • H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
    • H05B41/3924—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by phase control, e.g. using a triac

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

1. Device for controlling the brightness of fluorescent lamps by means of an adjustable phase control of each voltage half wave of a feeding alternating-current system, the current switched from the time of the phase control to the next zero transition of the voltage halfwave being supplied via a current-limiting ballast to the fluorescent lamp, the cathodes of the fluorescent lamp furthermore being continuously and uncontrolledly heated by the alternating current system, and means being provided to supply higher-frequency energy to the fluorescent lamp for its ignition, characterized by a trigger circuit (18) which can be fed by the voltage of the phasecontrolled halfwave of the system alternating voltage and a damped resonant circuit (31) which can be charged, which is connected to the trigger circuit and to which the fluorescent lamps can be connected with respect to alternating current, the damped oscillation of the resonant circuit (31) triggered by the trigger circuit having a higher frequency than the frequency of the system alternating voltage and exhibiting at the beginning an electric power which is sufficient for igniting the fluorescent lamp.
DE8585810080T 1984-06-21 1985-02-28 Brightness control device for a fluorescent lamp Expired DE3569864D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH301784 1984-06-21

Publications (1)

Publication Number Publication Date
DE3569864D1 true DE3569864D1 (en) 1989-06-01

Family

ID=4246770

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8585810080T Expired DE3569864D1 (en) 1984-06-21 1985-02-28 Brightness control device for a fluorescent lamp

Country Status (3)

Country Link
EP (1) EP0165893B2 (en)
AT (1) ATE42663T1 (en)
DE (1) DE3569864D1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3826234A1 (en) * 1988-08-02 1990-02-08 Kulzer & Co Gmbh CIRCUIT ARRANGEMENT FOR OPERATING A LOW-PRESSURE GAS DISCHARGE LAMP

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4096413A (en) * 1976-02-20 1978-06-20 General Electric Company Flicker eliminating intensity controller for discharge lamp dimming circuit
DE2938529C2 (en) * 1979-09-24 1981-10-15 Siemens AG, 1000 Berlin und 8000 München Ignition and operating device for a high pressure lamp

Also Published As

Publication number Publication date
EP0165893B1 (en) 1989-04-26
EP0165893B2 (en) 1993-06-09
ATE42663T1 (en) 1989-05-15
EP0165893A3 (en) 1986-04-09
EP0165893A2 (en) 1985-12-27

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8366 Restricted maintained after opposition proceedings
8327 Change in the person/name/address of the patent owner

Owner name: STARKSTROM-ELEKTRONIK AG, SPREITENBACH, CH

8339 Ceased/non-payment of the annual fee