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:
Oct. 09, 2012
Filed:
Oct. 15, 2010
Noriaki Sakamoto, Midori, JP;
Naoki Tanahashi, Osaka, JP;
Tsuyoshi Hasegawa, Daito, JP;
Takaya Kusabe, Ota, JP;
Masahiko Mizutani, Ota, JP;
Hideki Mizuhara, Ichinomiya, JP;
Yoshinari Sakuma, Niigata, JP;
Noriaki Sakamoto, Midori, JP;
Naoki Tanahashi, Osaka, JP;
Tsuyoshi Hasegawa, Daito, JP;
Takaya Kusabe, Ota, JP;
Masahiko Mizutani, Ota, JP;
Hideki Mizuhara, Ichinomiya, JP;
Yoshinari Sakuma, Niigata, JP;
SANYO Electric Co., Ltd., Moriguchi-shi, JP;
SANYO Semiconductor Co., Ltd., Gunma, JP;
Abstract
A lighting device including a metal substrate to prevent temperature rise of LED chip is offered. The lighting device includes the metal substrate, an anode or cathode electrode of the LED chip disposed on the metal substrate, brazing materials connecting the LED chip and the metal substrate, and a groove formed in the anode or cathode electrode. Forming the groove can prevent an occurrence of a crack in the brazing materials. Also, a lighting device includes the metal substrate, an anode and cathode electrode of the LED chip disposed on the metal substrate and brazing materials connecting the LED chip and the metal substrate. Further, a slit is formed in the metal substrate between the anode and cathode electrode. Forming the slit in the metal substrate can prevent an occurrence of a crack in the brazing materials.