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:
Mar. 11, 2014
Filed:
Jul. 04, 2011
Akihiko Murai, Osaka, JP;
Masahiro Kume, Kagoshima, JP;
Akiko Nakamura, Kyoto, JP;
Tooru Aoyagi, Kagoshima, JP;
Kiyoshi Fujihara, Hyogo, JP;
Akihiko Murai, Osaka, JP;
Masahiro Kume, Kagoshima, JP;
Akiko Nakamura, Kyoto, JP;
Tooru Aoyagi, Kagoshima, JP;
Kiyoshi Fujihara, Hyogo, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A light distribution controller of a light-emitting device includes a first optical member formed of ZnO disposed over an LED interposing a transparent adhesive, and a second optical member which covers the first optical member. The first optical member includes a first concave portion having an opening in a regular hexagon shape whose area gradually increases. In the first concave portion, inner wall surfaces having inclined surfaces, each of whose bases is formed by one side of the hexagon of the opening shape, are formed. Outside of the first optical member, outer wall surfaces each having a trapezoidal shape are formed. The second optical member includes a second concave portion arranged so that light at an annular peak in the light distribution characteristic of the light traveled through the first optical member is totally reflected.