The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 17, 2002
Filed:
May. 31, 2001
Sony Corporation, Tokyo, JP;
Abstract
A primary winding T and a switching circuit are serially inserted between input terminals Ti and Ti to which an alternating current is supplied. A diode , a resistor , and a capacitor are serially inserted in parallel with the primary winding T . A detecting circuit is connected to both ends of the capacitor and to an emitter and a collector of a phototransistor . A control circuit controls the switching circuit . A diode bridge and a capacitor are provided for a secondary winding T . Output terminals To and To are connected to both ends of the capacitor . A voltage detecting circuit is provided in parallel with the capacitor . The voltage detecting circuit detects voltages which are outputted from the output terminals To and To and supplies the detected voltages to a control circuit . The control circuit controls a light emitting diode