Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Hidehiko Kinoshita

Takahiro Urakabe

Akihiko Iwata

Takashi Furui

Yukihiro Okimoto

Mitsunori Maruyama

Taihei Kawasaka

Nobuyoshi Kura

A gas-discharge lamp lighting apparatus includes: a power conditioning unit regulating power supplied from a power source, and outputting voltages with mutually different levels from two output terminals; a switching circuit unit coupled between the output terminals of the power conditioning unit and including at least one switching element; and a pulse transformer generating a high-voltage pulse, placed in a circuit connecting the output terminals of the switching circuit unit and a gas-discharge lamp. A first terminal of a primary winding of the pulse transformer is connected to a first output terminal of the power conditioning unit via a first output terminal of the switching circuit unit, and a second terminal of the primary winding is directly connected to a second output terminal of the power conditioning unit.

Gas-discharge lamp lighting apparatus with optimized circuit configuration

A discharge lamp lighting device comprises a booster circuit for boosting the voltage of a DC power source in response to the ON-OFF operation of a switching element , a startup discharge circuit for performing the startup discharge of a discharge lamp according to the boosted DC voltage, a voltage detection circuit for detecting the boosted DC voltage, a control circuit for outputting the pulse modulated by pulse width modulation to the switching element , and a control circuit for controlling the pulse output from the control circuit to the switching element to intermittently enabling or disabling the passage thereof.

Discharge lamp lighting device

A gas discharge lamp lighting device includes a DC/DC converter for adjusting electric power supplied from a power supply to generate and output a DC voltage, and an FET electrically connected to the DC/DC converter, for converting the DC voltage from the DC/DC converter to an AC voltage to be supplied to a gas discharge lamp. A control unit brings the gas discharge lamp to an electrode heating state in which both electrodes of the gas discharge lamp are heated after supplying the AC voltage to the gas discharge lamp. The control unit controls energy supplied to the gas discharge lamp in the electrode heating state according to a voltage across the gas discharge lamp. The control unit brings the gas discharge lamp to an AC discharging state in which an AC current flows through the gas discharge lamp after the energy has been supplied to the gas discharge lamp.

Gas discharge lamp lighting device

A flickering number in an electric-discharge lamp is counted in a flickering number counting unit , a flickering number in an electric-discharge lamp is counted in a flickering number counting unit , and the lighting of the electric-discharge lamp or is inhibited by a lamp-lighting inhibiting unit or in cases where the flickering number in the electric-discharge lamp or exceeds a regular number.

Electric-discharge lamp control apparatus and electric-discharge lamp control method

A starting device integrates an output signal of an acceleration sensor by a band-pass integrating means while restricting an upper limit of the output signal in a specified frequency range by an upper limit restricting means, and is provided with a comparing means for outputting a starting signal when the integrated value is larger than a predetermined threshold value. In this way, the starting device is certainly started by an acceleration waveform of collision that must start the device. Further, the device is not influenced by vibration components caused immediately after the beginning of collision with respect to a low-speed collision such as 8 mile/hour frontal collision that must not start the device.

Starting device for a passenger protecting device

In a direction detecting apparatus for a vehicle, when signals input from an earth magnetic sensor into calculating means are judged to be outside a predetermined judging area, an alarm for prompting magnetization correction is given, thereby the direction detecting apparatus can surely display the alarm at any case without the necessity to rotate the vehicle.

Growing community of inventors

Tokyo, Japan

Hidehiko Kinoshita