Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Atusi Ootubo

Hiroyuki Matsumoto

Koji Uenoyama

Shinichi Nagaoka

Sinsuke Minaki

Jun Matsuzaki

Tadahiro Kono

Koji Yamashita

Tatsuru Ichioka

Tadahiro Kouno

A light-emitting device includes: a board; light-emitting elements interconnected in parallel and provided above a top face of the board; light-emitting elements, one of which is connected in series with the light-emitting element and the other of which is connected in series with the light-emitting element, the light-emitting elements being interconnected in parallel; a metal pattern provided continuously under the light-emitting elements, on an undersurface of the board; and a metal pattern provided continuously under the light-emitting elements, and isolated from the first metal pattern.

Light-emitting device and lighting apparatus

An illumination apparatus including: a power supply circuit which outputs a DC power obtained by rectifying an AC voltage and stepping up the rectified voltage; a light source unit having semiconductor light emitting elements turned on by the DC power; and a housing formed of a conductive material that is grounded through a ground path and on which the power supply circuit and the light source unit are mounted. When one of power feed lines is cut off, the light emitting elements are supplied with an AC power from an AC power source through the ground path and a stray capacitance formed between the light source unit and the housing, and a forward voltage of the light emitting elements has a light emission level hardly recognizable.

Illumination apparatus

Growing community of inventors

Osaka, Japan

Atusi Ootubo