Toshiba Lighting & Technology Corporation

Mari Nakamura

Shinya Hakuta

Hiroshi Kubota

Katsuyuki Kobayashi

Hitoshi Kawano

Shinichiro Matsumoto

Toshiyuki Hiraoka

Tsutomu Araki

Yoshikazu Ito

Yasuhiro Shida

Ryota Irie

A self-ballasted fluorescent lamp capable of achieving a similar appearance to that of an electric light bulb for general illumination includes a base that is attached to a bottom end of a cover and a luminous tube that is supported at a top end of the cover. Electronic components forming a lighting circuit are mounted on a substrate. The substrate is formed to have such a width dimension that allows the substrate to be inserted into the base. The substrate is vertically disposed along a center axis of the base at a position offset from the center axis. Large electronic components are disposed on a first face of the substrate, which faces a large component area in the base formed by the offset substrate.

Self-ballasted fluorescent lamp and lighting apparatus

An electrolytic capacitor and a ballast choke of a lighting circuit, are disposed on a first face of a circuit board facing a base, and a one-package switch of the lighting circuit is disposed on a second face, facing a fluorescent lamp. The one-package switch comprises field effect transistors contained in a single package and serve as two inverter switches for driving the fluorescent lamp. The one-package switch is a generally rectangular SMD with dimensions of not more than 6 mm respectively in length and width and mounted on the second face of the circuit board by means of terminals of the one-package switch. The one-package switch enhances heat dissipation properties of the circuit, enables the reduction of its dimensions, and increases the mounting efficiency.

Self-ballasted fluorescent lamp and luminaire

Growing community of inventors

Odawara, Japan

Mari Nakamura