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EP0165893A3 - Brightness control device for a fluorescent lamp - Google Patents

Brightness control device for a fluorescent lamp Download PDF

Info

Publication number
EP0165893A3
EP0165893A3 EP85810080A EP85810080A EP0165893A3 EP 0165893 A3 EP0165893 A3 EP 0165893A3 EP 85810080 A EP85810080 A EP 85810080A EP 85810080 A EP85810080 A EP 85810080A EP 0165893 A3 EP0165893 A3 EP 0165893A3
Authority
EP
European Patent Office
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.)
Granted
Application number
EP85810080A
Other languages
German (de)
Other versions
EP0165893B2 (en
EP0165893A2 (en
EP0165893B1 (en
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
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=EP0165893(A3) "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
Priority to AT85810080T priority Critical patent/ATE42663T1/en
Publication of EP0165893A2 publication Critical patent/EP0165893A2/en
Publication of EP0165893A3 publication Critical patent/EP0165893A3/en
Application granted granted Critical
Publication of EP0165893B1 publication Critical patent/EP0165893B1/en
Publication of EP0165893B2 publication Critical patent/EP0165893B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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.
EP85810080A 1984-06-21 1985-02-28 Brightness control device for a fluorescent lamp Expired - Lifetime EP0165893B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85810080T ATE42663T1 (en) 1984-06-21 1985-02-28 DEVICE FOR CONTROLLING THE BRIGHTNESS OF FLUORESCENT LAMPS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3017/84 1984-06-21
CH301784 1984-06-21

Publications (4)

Publication Number Publication Date
EP0165893A2 EP0165893A2 (en) 1985-12-27
EP0165893A3 true EP0165893A3 (en) 1986-04-09
EP0165893B1 EP0165893B1 (en) 1989-04-26
EP0165893B2 EP0165893B2 (en) 1993-06-09

Family

ID=4246770

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85810080A Expired - Lifetime EP0165893B2 (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

Citations (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
DE2938529B1 (en) * 1979-09-24 1981-02-19 Siemens Ag Ignition and operating device for a high pressure lamp

Patent Citations (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
DE2938529B1 (en) * 1979-09-24 1981-02-19 Siemens Ag Ignition and operating device for a high pressure lamp

Also Published As

Publication number Publication date
EP0165893B2 (en) 1993-06-09
DE3569864D1 (en) 1989-06-01
ATE42663T1 (en) 1989-05-15
EP0165893A2 (en) 1985-12-27
EP0165893B1 (en) 1989-04-26

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