Toshiba Lighting & Technology Corporation

Kabushiki Kaisha Toshiba

Tokyo Electric Co.

Kabushiki Kaisha Tec

Toshiyuki Hiraoka

Keiichi Shimizu

Hirokazu Otake

Nobuo Shibano

Masahiko Kamata

Hiroshi Kubota

Shinya Hakuta

Shinichiro Matsumoto

Takuro Hiramatsu

Naoko Iwai

Tsutomu Araki

Masahiro Sugiyama

Kenji Sugiyama

Isao Yamazaki

Noriyuki Kitamura

Takeo Yasuda

Masahiro Toda

Hiroshi Terasaka

Yoshiyuki Matsunaga

Satoshi Watanabe

Naoki Sugishita

Hajime Osaki

Toru Ishikita

Shinji Nogi

Katsusuke Uchino

Masanao Hieda

Kazuyuki Uratani

Mari Nakamura

Shigesada Suzuki

Yuki Harada

Koji Sato

Koji Takahasi

Masao Hori

Takafumi Takeda

Kazuyuki Yamamoto

Both ends of a lamp body are mounted on sockets of an apparatus body and a feeding unit configured to feed power to LEDs is provided on the back side facing the apparatus body of the lamp body.

Tube lamp and luminaire

To a constant-current power supply whose output current can be variably set, light emitting modules can be connected in parallel. A control unit recognizes connection information outputted from an information output unit provided in each of the light emitting modules and varies the output current of the constant-current power supply. Drive can be controlled in response to a state of the connected light emitting modules such as the connecting number of light emitting modules.

Illuminating device

Illuminating device and controlling method thereof

Light emitting module and illuminating device

Certain embodiments provide an LED lighting equipment including a lighting main body. An LED power device has a DC power source and a DC-DC converter having an input terminal connected to the DC power source and the DC-DC converter having an output terminal. An LED light source has a board and a plurality of LED packages; each including a plurality of LED chips connected in series. The LED packages are mounted on the board and connected in series to the output terminal of the DC-DC converter.

LED lighting equipment

There is provided an LED lighting device having a satisfactory temperature characteristic and a small amount of variation in output current. The step-down chopper is provided with a first circuit including the switching element, the impedance means and a first inductor connected in series and a second circuit including the first inductor and a diode connected in series. A self-excited drive signal generation circuit is provided with a second inductor magnetically coupled with the first inductor and applies a voltage induced in the second inductor to the switching element to keep the switching element on. A turn-off circuit outputs an output voltage when the voltage of the impedance means detected by a comparator exceeds the reference value, and the output voltage allows a switching element to turn on to short-circuit the output terminals of the self-excited drive signal generation circuit, resulting in that the switching element is turned off.

Light-emitting diode lighting device with step-down chopper

A fluorescent lamp lighting apparatus according to the present invention comprises an initial illuminance correction control circuit which sets a fluorescent lamp to an initial illuminance correction control lighting mode, a switching portion which changes the fluorescent lamp from the initial illuminance correction control lighting mode to an external control dimming mode when a predetermined external dimming signal is detected, and a control portion which gradually dimming so as to achieve a dimming level of a switched mode when switching the initial illuminance correction control lighting mode and the external control dimming mode, and control so as to achieve a dimming level corresponding to a cumulative lighting time of the fluorescent lamp when the changed mode is the initial illuminance correction control lighting mode.

Fluorescent lamp lighting apparatus and lighting control system

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

Numazu, Japan

Toshiyuki Hiraoka