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:
Jun. 23, 2015
Filed:
Jul. 22, 2011
Hiroshi Terasaka, Yokosuka, JP;
Hiroshi Kubota, Yokosuka, JP;
Masahiko Kamata, Yokosuka, JP;
Naoko Iwai, Yokosuka, JP;
Takeshi Saito, Ashiya, JP;
Hiroki Nakagawa, Ibaraki, JP;
Katsunobu Hamamoto, Neyagawa, JP;
Hiroyuki Sako, Hirakata, JP;
Hiroshi Terasaka, Yokosuka, JP;
Hiroshi Kubota, Yokosuka, JP;
Masahiko Kamata, Yokosuka, JP;
Naoko Iwai, Yokosuka, JP;
Takeshi Saito, Ashiya, JP;
Hiroki Nakagawa, Ibaraki, JP;
Katsunobu Hamamoto, Neyagawa, JP;
Hiroyuki Sako, Hirakata, JP;
Toshiba Lighting & Technology Corporation, Kanagawa, JP;
Panasonic Corporation, Osaka, JP;
Panasonic Electric Works Co., Ltd., Osaka, JP;
Abstract
A dedicated power source for LED lamps capable of reliably detecting attachment of an LED lamp is provided. A dedicated power source has a DC power source portion, and includes a lighting circuit which receives power supplied from the DC power source portion and light-controls an LED lamp including an LED element and a detection resistor connected in parallel to the LED element and an attachment detecting portion for detecting attachment of the LED lamp based on a voltage level changing in accordance with attachment/detachment of the detection resistor by attachment/detachment of the LED lamp.