(19)
(11) EP 1 098 553 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
09.06.2004 Bulletin 2004/24

(43) Date of publication A2:
09.05.2001 Bulletin 2001/19

(21) Application number: 00203774.5

(22) Date of filing: 30.10.2000
(51) International Patent Classification (IPC)7: H05B 41/392
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 03.11.1999 IT MI992292

(71) Applicant: Beghelli S.p.A.
40050 Monteveglio, Bologna (IT)

(72) Inventor:
  • Beghelli, Gian Pietro
    40050 Monteveglio (Bologna) (IT)

(74) Representative: De Gregori, Antonella et al
Ing. Barzano & Zanardo Milano S.p.A. Via Borgonuovo 10
20121 Milano
20121 Milano (IT)

   


(54) Automatic lighting intensity regulating device


(57) An automatic lighting intensity regulating device or "dimmer" (DM), utilizable in particular for electronic reactors of fluorescent tubes, controlled by an electronic circuit for the partial closing of the conduction angle, in order to supply a lamp current (IL), for each cycle of the rectified network signal (IR) , only for a certain amount of time, so as to minimize the production and operating costs of the device (DM), with respect to those now offered on the market.






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