(19)
(11) EP 2 106 200 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
17.12.2014 Bulletin 2014/51

(43) Date of publication A2:
30.09.2009 Bulletin 2009/40

(21) Application number: 09156082.1

(22) Date of filing: 24.03.2009
(51) International Patent Classification (IPC): 
H05B 41/04(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA RS

(30) Priority: 27.03.2008 JP 2008083661

(71) Applicant: Panasonic Corporation
Osaka 571-8501 (JP)

(72) Inventors:
  • Matsuzaki, Jun
    Niigata 959-0192 (JP)
  • Ogasawara, Kiyosi
    Osaka 583-0864 (JP)
  • Sasakawa, Tomohiro
    Osaka 567-0086 (JP)

(74) Representative: Rüger, Barthelt & Abel 
Patentanwälte Webergasse 3
73728 Esslingen
73728 Esslingen (DE)

   


(54) Discharge lamp lighting device and illumination fixture


(57) [Object] A plurality of lamps having compatible electrical characteristics and considerably different rated power can be lit by using a common lighting device.
[Means for Settlement] In a discharge lamp lighting device capable of lighting plural types of discharge lamps with different recommended conditions of precedent preheating for filament and determining the type of a discharge lamp by detecting a voltage at both ends of the filament within a period of precedent preheating time, a higher current value included in the recommended conditions is used for a preheating current in the detection and an output is set to be applicable to rated power of a determined discharge lamp. A preheating current in the detection is also set to generate a discharge between electrodes in the periphery of a filament within a period of precedent preheating time if a discharge lamp with lower criteria of the recommended conditions is fitted.







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