Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Matsushita Electric Works, Ltd.

Kei Mitsuyasu

Katsunobu Hamamoto

Yoshifumi Kuroki

Hideaki Abe

Satoshi Yagi

Masafumi Yamamoto

Keisuke Ueda

Katsuyoshi Nakada

Tokushi Yamauchi

Katunobu Hamamoto

Hiroshi Sugawara

Teruhito Takeda

Naoki Onishi

Hiromichi Goto

Akio Okude

Katsuyuki Doi

Kiyoshi Ogasawara

Katsumi Sato

Masahiro Yamanaka

Naoki Ohnishi

Katsuyuki Kiyozumi

Takafumi Fujino

Tomohiro Sugiura

Tomohiro Sasakawa

Akira Horiguchi

Satohiko Hosomi

Shinichiro Goto

A dimming lighting circuit includes: a rectifier circuit; a phase detection circuit which outputs a dimming signal having a signal level corresponding to a conduction phase angle of an AC voltage; and a DC-DC converter which receives a DC voltage output from the rectifier circuit and supplies a light source with a DC current corresponding to the signal level of the dimming signal output from the phase detection circuit. If the conduction phase angle detected when the dimming lighting circuit receives the AC voltage at power-on is less than or equal to a predetermined angle, the phase detection circuit outputs, as the dimming signal, a substitute signal having a signal level corresponding to a conduction phase angle greater than the conduction phase angle of the AC voltage, for a predetermined time period.

Dimming lighting circuit and luminaire

In a power supply device, a primary winding of a transformer is connected in series to a main switching element, and is connected in parallel to a series circuit of a resonance capacitor and a sub switching element. A secondary winding of the transformer is connected in series to a series circuit of a rectifying element and a resonance inductor. The capacitance of the resonance capacitor and the inductance of the resonance inductor are each set such that, when the sub switching element is in an on state, the waveform of the voltage that is generated between the first main terminal and the second main terminal of the main switching element takes a protruding curve shape, the voltage being generated due to a resonance phenomenon of at least the resonance capacitor and the resonance inductor.

Power supply device and lighting apparatus using the same

An illumination lighting apparatus is connected to, as an external apparatus, any of a human body sensing sensor configured to detect presence/absence of a person, an illuminance sensor configured to detect space illuminance, and a dimmer which arbitrarily adjusts the space illuminance, and is configured to produce an output control signal for controlling an optical output of a light source based on a signal output from the external apparatus. The illumination lighting apparatus includes: an external apparatus determining unit configured to determine which kind of the external apparatus is connected based on the signal output from the external apparatus; and a signal processing unit configured to produce the output control signal based on the signal output from the external apparatus.

Illumination lighting apparatus, illumination apparatus, and illumination system

A light source module includes a substrate unit for mounting multiple light emitting diodes thereon to electrically connecting them; first and second electrical connecting terminals for supplying a current to the light emitting diodes based on a voltage applied from outside the substrate unit; and a characteristic setting unit for presetting characteristic information corresponding to a electrical characteristic of the light emitting diodes. Further, the light source module includes a third electrical connecting terminal for outputting a setting signal based on the characteristic information preset in the characteristic setting unit, and the characteristic setting unit is connected at least between the third and first electrical connecting terminals or between the third and second electrical connecting terminals, and the characteristic setting unit responds to a set-up power inputted from the third electrical connecting terminal to generate the setting signal.

Light source module and lighting apparatus, and illumination apparatus using same

The ballast of the present invention includes a DC power supply, an inverter circuit, a load circuit, and an integrated control circuit. The integrated control circuit controls the switching elements of the DC power supply and the inverter circuit. The integrated control circuit includes a first control unit, a second control unit, and a driver circuit. The first control unit generates a first control signal for control of the switching element of the DC power supply. The second control unit generates a second control signal for control of the switching elements of the inverter circuit. The driver circuit provides drive signals for driving each one of the switching elements of said DC power supply and the inverter circuit in accordance with the first control signal and the second control signal. As mentioned above, control circuits for controlling the DC power supply and the inverter circuit are integrated into a single component, the number of components which are mounted on a printed circuit board is reduced.

Ballast for a discharge lamp with integrated control circuit for controlling switching element of dc power supply and inverter circuit

A discharge lamp lighting device has first switching means for converting AC power into DC power and second switching means for converting the DC power into a high frequency power, the first switching means being driven subsequently to a driving of the second switching means, and the device is arranged for intermittently applying a pulse voltage to a discharge lamp during its dimming lighting, whereby any secondary voltage can be effectively lowered and any flash apt to occur during the dimming lighting can be restrained.

Discharge lamp lighting device

Growing community of inventors

Osaka, Japan

Kei Mitsuyasu