Nichia Corporation

Yohei Minoda

Kazunori Watanabe

Toshiyuki Yagi

A light emitting device includes a substrate, a first light emitting element, a second light emitting element, a first conductive pattern, and a second conductive pattern. The first conductive pattern is provided on the substrate and includes a first element mounting portion and a first wire connecting portion. The second conductive pattern is provided on the substrate to form a first wiring gap between the first conductive pattern and the second conductive pattern. A first recess is provided between the first element mounting portion and the first wire connecting portion and is in communication with the first wiring gap. At least a part of an outer shape of the first element mounting portion is defined by the first wiring gap and the first recess on a third side of the first element mounting portion adjacent to the second conductive pattern.

Light emitting device

A light emitting device includes a substrate; a first metal film formed on the substrate; a plurality of light emitting elements arranged in a line, each comprising a second metal film on a lower face thereof, each having a quadrilateral outline; and a die bond placed between the first metal film and the second metal films to fix the second metal film on the first metal film. The substrate includes low wettability areas having wettability to the die bond lower than the first metal film. Each of the low wettability areas is disposed between two of the light emitting elements, and each of four sides of the quadrilateral outline is adjacent to the low wettability area different from the low wettability areas adjacent to one of the other three sides.

Light emitting device for linear light source

A light emitting device includes: a substrate; a first metal film formed on the substrate; quadrilateral light emitting elements arranged in a line at an interval d, with second metal films on lower faces, and a die bond fixes the first and second metal films together. A diagonal of the respective quadrilateral outlines of the light emitting elements is aligned with the line. One of a distance Dfrom a light emitting element on one end among the light emitting elements arranged in the line to an end of the substrate, and a distance Dfrom a light emitting element on the other end among the light emitting elements arranged in the line to an end of the substrate is equal to or shorter than the interval d.

Growing community of inventors

Yokohama, Japan

Yohei Minoda