Citizen Electronics Co., Ltd.

Citizen Watch Company, Ltd.

Citizen Holdings Company, Ltd.

Takuya Funakubo

Takeru Ohmori

Junji Miyashita

Kosuke Tsuchiya

Yuichi Miura

Sadato Imai

Tatsuya Katoh

Hiroaki Eguchi

Light emitting diode

In a first aspect of the present invention, it is suggested that a mounting method for mounting light-emitting elements as evenly as possible in a mounting area of a lighting device may permit increased number of light-emitting elements. In a second aspect of the present invention, a lighting device including a substrate with a circular mounting area, a plurality of light-emitting elements configured to be positioned at centers of equal smaller circular areas that are calculated to be equal in size in the circular mounting area, the equal smaller circular areas being equal in size to each other and set as large as possible without an overlapping portion in the circular mounting area, a total area of the equal smaller circular areas being smaller than the circular mounting area, and the light-emitting elements and the equal smaller circular areas being the same in number is suggested.

Method for mounting light-emitting elements

Light source

In accordance with a first aspect of the present inventive subject matter, a lighting device includes light-emitting elements arranged in lines that are extended in parallel with one another, the light-emitting elements being divided into groups each including the same number of light-emitting elements, a first connecting electrode is disposed adjacent to one end portion of the lines extended, a second connecting electrode is disposed adjacent to another end portion of the lines extended, and the light-emitting elements within each group are electrically connected in series with one another by metallic wires and electrically connected in series to the first connecting electrode and to the second connecting electrode. The groups each include the same number of light-emitting elements that are electrically connected in parallel between the first connecting electrode and the second connecting electrode.

Lighting device including light-emitting element

In accordance with an aspect of the present inventive subject matter, a lighting device includes light-emitting elements that are mounted in a circular mounting area to be directed in a same direction in the circular mounting area between a first connecting electrode and a second connecting electrode disposed on a substrate, the light-emitting elements are divided into groups each including the same number of light-emitting elements, the light-emitting elements within each group are electrically connected in series with one another by metallic wires and electrically connected in series to the first connecting electrode and to the second connecting electrode. The groups each include the same number of light-emitting elements that are electrically connected in parallel between the first connecting electrode and the second connecting electrode. As another aspect of the present inventive subject matter, a method of manufacturing a lighting device is disclosed.

Lighting device including light-emitting element and method for manufacturing the same

Light-emitting diode

Growing community of inventors

Yamanashi, Japan

Takuya Funakubo