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:
May. 24, 2005
Filed:
Oct. 15, 2003
Kenji Yoneda, Kyoto, JP;
Tomomi Iwata, Kyoto, JP;
Masahiro Wakata, Kyoto, JP;
CCS, Inc., Kyoto, JP;
Abstract
An electric power supply system is provided to recognize a type or a desired operating condition of a connected LED lighting unit automatically and to supply electric power corresponding to the type or the operating condition. An electric power supply system for LED lighting unit comprises an LED lighting unitthat has an LED conducting circuit including at least an LEDand a resistorhaving resistance R corresponding to a specification or a characteristics of use of the LED conducting circuit and an electric power supply unitconsisting of a constant current supply that can be connected with both ends of the LED conducting circuit in order to supply electric power to the LED conducting circuit and is so arranged that a type identify portionconsisting of a resistor measuring circuit that can be connected with both ends of the resistor and a constant current control portionthat supplies a control current in an arbitrary range not over the maximum allowable current of the LED conducting circuit set based on the resistance of the resistor measured by the type identify portionto the LED conducting circuit.