Nichia Corporation

Asahi Kasei Chemicals Corporation

Motohisa Kitani

Masafumi Kuramoto

Junya Narita

Hirofumi Ichikawa

Takanori Akaishi

Keisuke Kurashita

Tomohide Miki

Masaki Hayashi

Yuki Shiota

Kazunori Terada

Kazuhiko Hashimoto

Tomoya Tsukioka

A light emitting device includes a package and at least one light emitting element. The package includes a recess portion which has a bottom surface, an opening on a front side opposite to the bottom surface in a front direction vertical to the bottom surface, and an inner peripheral wall connecting the bottom surface and the front side. The bottom surface has distances between opposite sides of the bottom surface and has a longest distance among the distances. The at least one light emitting element is disposed on the bottom surface of the recess portion and has a polygonal shape which has five or more sides and which has a longest diagonal line viewed along the front direction. Each internal angle of the polygonal shape is less than 180&#xb0;. The longest diagonal line of the polygonal shape is parallel to a lateral line along the longest distance.

Light emitting device

A light-emitting device includes a package and at least one light-emitting element. The package includes a concave portion which has a bottom surface. The bottom surface includes sides, package distances between opposite sides among the sides, a longest package distance among the package distances, a lower side among the sides, and an upper side among the sides opposite to the lower side. The at least one light-emitting element is arranged on the bottom surface of the concave portion and has a polygonal shape viewed along a front direction. The polygonal shape has light-emitting element distances between vertexes of the polygonal shape and has a longest light-emitting element distance among the light-emitting element distances. The at least one light-emitting element is arranged such that a light-emitting element lateral line along the longest light-emitting element distance is substantially parallel to a package lateral line along the longest package distance.

Light-emitting device

The present invention relates to a reflector for a light-emitting device consisting of (A) an polyamide composition comprising a polyamide polymerized from (a) a dicarboxylic acid comprising at least 50 mol % of an alicyclic dicarboxylic acid and (b) a diamine comprising at least 50 mol % of a diamine with a branched main chain.

Reflector for light-emitting device, and light-emitting device

An object of the present invention is to provide a light emitting device that shows high adhesion between a sealing member and a package member. A light emitting deviceof the present invention comprises a packagewith a recesshaving a bottom faceand a side wall, a light emitting elementmounted on the bottom faceof the recessof the package, and a sealing memberfilled in the recessof the package, with which the light emitting elementis coated, wherein the packagecontains, against the entire monomer component, from 5 to 70% by weight of potassium titanate fibers and/or wollastonite, from 10 to 50% by weight of titanium oxide, and from 15 to 85% by weight of a semiaromatic polyamide containing 20 mol % or more of an aromatic monomer, a part of the side wallof the recessof the packagehas a thickness of 100 &#x3bc;m or less, and the sealing memberis made of silicone.

Light emitting device and backlight unit using the same

Growing community of inventors

Tokushima, Japan

Motohisa Kitani