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. 13, 2017
Filed:
May. 15, 2013
Sharp Kabushiki Kaisha, Osaka-shi, Osaka, JP;
Shin Itoh, Osaka, JP;
SHARP KABUSHIKI KAISHA, Osaka, JP;
Abstract
An LED chip () is disposed in a recessed portion () formed by bending a metal lead frame (). A reflector () has a resin reflection surface () and the recessed portion () has a metal reflection surface (). When the inclination angle of at least one metal reflection surface () is θs(°), the resin reflection surface () has a sloped resin surface with an inclination angle of θs(°) that is smaller than θs(°). With θc(°) defined as the critical angle of light emitted from an LED chip () and incident on the interface between a light-transmissive resin () and an air layer, the sloped resin surface and metal reflection surface having a relationship of θs<θs, satisfies both a conditional expression (1): 45°−θc/2<θs<θc and a conditional expression (2): 35°≦θs≦55°.