Toshiba Lighting & Technology Corporation

Kabushiki Kaisha Toshiba

Kenichi Asami

Hajime Osaki

Hirokazu Otake

Yoshiyuki Matsunaga

Isao Abe

Takashi Inoue

Hitoshi Kawano

Takeo Yasuda

Masatoshi Kumagai

Naoko Iwai

Hideo Kozuka

Susumu Shimasaki

Takashi Oku

Junichi Ishiguro

According to one embodiment, a light-emitting circuit includes: a plurality of substrates in which wiring pattern layers are formed, the substrates including light-emitting elements connected to and mounted on the wiring pattern layers; and a linear conductor having electric conductivity, the linear conductor including linear joining sections at both ends electrically connected to the wiring pattern layers of the substrates and a convex section formed to be bent in a convex shape in an intermediate section between the joining sections, and the joining sections being respectively joined to the wiring pattern layers among the plurality of substrates adjacent to one another.

Light-emitting circuit, luminaire, and manufacturing method for the light-emitting circuit

The present invention provides a pair of input terminals to which AC voltage is input, the AC voltage being phase-controlled by a dimmer for phase-controlling AC voltage of an AC source; a damping circuit which has a resistor inserted to a position, into which input current flows from the AC source via the dimmer in series, and a capacitor and an inductor which form a closed circuit together with the AC source and the dimmer, and suppresses high-frequency vibration generated in the dimmer when a phase control element of the dimmer is turned on; and an LED lighting circuit which rectifies AC voltage phase-controlled and input via the pair of input terminals, converts DC output voltage, which is obtained by rectification, so that the voltage adapts to a load, and lights the LED.

LED lighting device and illumination apparatus

According to one embodiment, an LED lighting device includes a DC source, a non-insulated step-down chopper and a light emitting diode. The non-insulated step-down chopper includes: a first circuit in which a switching element, a current detecting impedance element and an inductor are connected in series to each other; a second circuit in which the inductor and a freewheel diode are connected in series to each other; and a control portion for controlling the switching element. A power portion including the switching element and the control portion are constituted by a single package IC, and the current detecting impedance element and inductor are attached to the outside of the IC.

Led lighting device and illumination apparatus

The present invention provides an LED lighting device including: a rectifying circuit having AC input ends connected to an AC source; a converter which has input ends connected to DC output ends of the rectifying circuit and output ends, to which an output capacitor is connected in parallel, connected to an LED, and lights the LED; a control unit for changing continued DC output current of the converter in accordance with a dimming degree; and a bypass circuit which is connected to the output ends of the converter in parallel with the output capacitor and makes bypass current flow, the bypass current being larger than lighting current, which flows through the LED, at least in the vicinity of a dimming lower limit.

An electrolytic capacitor includes: a case including a case body, in which an electrolytic capacitor element is disposed in a sealed manner and filled up with an electrolytic solution, and a safety valve is mounted to the case body for jetting an evaporated gas of the electrolytic solution filling the electrolytic capacitor element; a cover member mounted to the case so as to cover the safety valve provided for the case; a first fixing unit mounted to the cover member so as to prevent the cover member from dismounting when the evaporated gas of the electrolytic solution is jetted outward; and a second fixing unit disposed in association with the first fixing unit and adopted to reinforce and assist a function of the first fixing unit to thereby prevent the cover member from being dismounted. An electric equipment includes a lighting circuit including circuit components, and an electrolytic capacitor of the structure mentioned above.

Electrolytic capacitor and electric equipment provided therewith

An electrical apparatus comprises a circuit board, providing an electrolytic condenser and electrical components, and a housing. The housing accommodates the circuit board. The electrical components include resin containing one or more halogen compounds of about 1% by weight or less in terms of bromine (Br).

Electrical apparatus

A compact fluorescent lamp unit has a phosphor coated bulb of which first and second sealed end portions. A pair of filaments is disposed in the bulb. The filament contains an emitter for enhancing thermionic emission of electrons therefrom and is caused to be cut off by the self-generated heat when the emitter is substantially dissipated. The lamp device has an inverter circuit containing a resonant capacitor disposed between each one end of the filament coils to pass a resonant current through the capacitor during the operation of the lamp. The filament coil is substantially composed of a tungsten wire having a diameter corresponding to 8 MG though 12 MG and is normally operated with a lamp current ranging from 250 mA to 350 mA. The filament coil has a cold resistance ranging from 2 .OMEGA. to 4 .OMEGA. and an output voltage of the inverter circuit exhibits more than 260 volts when the fluorescent lamp is substituted by a resistor having 5 .OMEGA..

Growing community of inventors

Yokosuka, Japan

Kenichi Asami