DISCHARGE LAMP LIGHTING DEVICE

PROBLEM TO BE SOLVED: To prevent moving streaks of a modulated light based on a simple circuit configuration without using parts allowing high withstand pressure and high electric current. SOLUTION: In this lighting device provided with a push-pull circuit 1 connected between a dc electric power sou...

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Bibliographische Detailangaben
Hauptverfasser:	SHIRAISHI TOMOO, TAKAZUMI KENICHI
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To prevent moving streaks of a modulated light based on a simple circuit configuration without using parts allowing high withstand pressure and high electric current. SOLUTION: In this lighting device provided with a push-pull circuit 1 connected between a dc electric power source 7 and a discharge lamp 3 and a control circuit 2 for controlling a pair of switching elements 11 and 12 of the push-pull circuit 1 to light the discharge lamp 3, input or output of one of switching elements 11 and 12 of the push-pull circuit 1 is fed back by impedance and the switching elements 11 and 12 are controlled to shift the timing to turn off. Thereby, a high frequency electric power supplied to the discharge lamp 3 is made to have an asymmetric waveform with respect to the positive and negative parts.