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1. WO2009008175 - LIGHTING METHOD FOR A HIGH-PRESSURE DISCHARGE LAMP, LIGHTING CIRCUIT FOR A HIGH-PRESSURE DISCHARGE LAMP, HIGH-PRESSURE DISCHARGE LAMP APPARATUS, AND PROJECTOR-TYPE IMAGE DISPLAY APPARATUS

Publication Number WO/2009/008175
Publication Date 15.01.2009
International Application No. PCT/JP2008/001860
International Filing Date 10.07.2008
IPC
H05B 41/292 2006.01
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
41Circuit arrangements or apparatus for igniting or operating discharge lamps
14Circuit arrangements
26in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
28using static converters
288with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
292Arrangements for protecting lamps or circuits against abnormal operating conditions
CPC
H05B 41/2928
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
41Circuit arrangements or apparatus for igniting or operating discharge lamps
14Circuit arrangements
26in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
28using static converters
288with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
292Arrangements for protecting lamps or circuits against abnormal operating conditions
2928for protecting the lamp against abnormal operating conditions
Applicants
  • PANASONIC CORPORATION [JP]/[JP] (AllExceptUS)
  • ONO, Syunsuke (UsOnly)
  • OZASA, Minoru (UsOnly)
  • YAMAMOTO, Masahiro (UsOnly)
  • YAMADA, Go (UsOnly)
Inventors
  • ONO, Syunsuke
  • OZASA, Minoru
  • YAMAMOTO, Masahiro
  • YAMADA, Go
Agents
  • NAKAJIMA, Shiro
Priority Data
2007-18362812.07.2007JP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) LIGHTING METHOD FOR A HIGH-PRESSURE DISCHARGE LAMP, LIGHTING CIRCUIT FOR A HIGH-PRESSURE DISCHARGE LAMP, HIGH-PRESSURE DISCHARGE LAMP APPARATUS, AND PROJECTOR-TYPE IMAGE DISPLAY APPARATUS
(FR) PROCÉDÉ D'ÉCLAIRAGE POUR UNE LAMPE À DÉCHARGE HAUTE PRESSION, CIRCUIT D'ÉCLAIRAGE POUR UNE LAMPE À DÉCHARGE HAUTE PRESSION, APPAREIL À LAMPE À DÉCHARGE HAUTE PRESSION, ET APPAREIL D'AFFICHAGE D'IMAGE DU TYPE PROJECTEUR
Abstract
(EN)
After startup, a lighting method for a high-pressure discharge lamp is to light the lamp at a rated frequency without switching the frequency for 120 seconds (S12, S13), and thereafter to switch from the rated frequency to a more audible frequency in accordance with a change in voltage value (S21 to S23).
(FR)
Selon l'invention, après le démarrage, un procédé d'éclairage pour une lampe à décharge haute pression consiste à éclairer la lampe à une fréquence nominale sans commuter la fréquence pendant 120 secondes (S12, S13), et ensuite à basculer de la fréquence nominale à une fréquence plus audible conformément à une variation d'une valeur de tension (S21 à S23).
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