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:
Jan. 11, 2005
Filed:
Apr. 11, 2002
Yuji Takahashi, Nishikasugai-gun, JP;
Koichi Kaga, Nishikasugai-gun, JP;
Hideaki Kato, Nishikasugai-gun, JP;
Tadaaki Ikeda, Hioki-gun, JP;
Michio Miyawaki, Sendai, JP;
Yuji Takahashi, Nishikasugai-gun, JP;
Koichi Kaga, Nishikasugai-gun, JP;
Hideaki Kato, Nishikasugai-gun, JP;
Tadaaki Ikeda, Hioki-gun, JP;
Michio Miyawaki, Sendai, JP;
Toyoda Gosei Co., Ltd., Aichi, JP;
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Abstract
In an LED lamp, a Zener diode is mounted on a copper plate, and a GaN-based light-emitting element is mounted on the Zener diode with an electrode of the element being oriented facedown. Two Zener diodes close to the center of the LED lamp are mounted on a common copper plate, thereby interconnecting the two light-emitting elements in series. Consequently, a Zener diode is connected to the respective two Zener diodes by means of a wire serving as a conductive member. Four light-emitting elements are connected in series, so that four light-emitting elements are connected in series, thus completing a circuit configuration. In this way, use of the Zener diodes for interconnection purpose enables a reduction in the number of minimum required wires. It is better to connect the wire to the upper surfaces of the Zener diodes, thereby obviating a necessity for a redundant wire space and enabling miniaturization of the LED lamp.