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. 16, 2018
Filed:
Aug. 30, 2013
Kobe Steel, Ltd., Kobe-shi, JP;
Haruyuki Konishi, Kobe, JP;
Haruyuki Matsuda, Kobe, JP;
Kobe Steel, Ltd., Kobe-shi, JP;
Abstract
A heat sink includes a base, to which an LED element is attached, and a plate-shaped heat dissipating surface integrally and continuously formed with the base around the LED element. The base and the plate-shaped heat dissipating surface are formed of aluminum or an aluminum alloy having a specific thermal conductivity λ and a specific surface emissivity ε. When the plate thickness of the base and the plate-shaped heat dissipating surface is specified in a range from 0.8 to 6 mm, a total projected area of the heat dissipating surfaces of the heat sink is specified in a range from 19000 to 60000 mmso as to obtain a heat resistance of 4.0 K/W or smaller. Projected areas of two plate-shaped heat dissipating surfaces of the heat sink in two different directions are sufficiently increased with respect to corresponding sectional areas of the base.