Abstract: A discharge lamp lighting device comprises a booster circuit 2 for boosting the voltage of a DC power source 1 in response to the ON-OFF operation of a switching element 2c, a startup discharge circuit 9 for performing the startup discharge of a discharge lamp 10 according to the boosted DC voltage, a voltage detection circuit 5 for detecting the boosted DC voltage, a control circuit 7b for outputting the pulse modulated by pulse width modulation to the switching element 2c, and a control circuit 7a for controlling the pulse output from the control circuit 7b to the switching element 2c to intermittently enabling or disabling the passage thereof.

Abstract: An image forming apparatus includes an image forming device for forming an unfixed image on a recording material transported thereto, the image forming device being capable of continuously effecting image formation on recording materials differing in the width thereof in a direction orthogonal to the transport direction thereof, a fixing device having a heat member and for fixing the unfixed image by the use of heat and pressure, and a recording material changeover device capable, when images are to be continuously formed on recording materials smaller in the width thereof in the direction orthogonal to the transport direction than a maximum width with which the recording materials can be passed, of changing over the recording materials to recording materials greater in the width thereof in the direction orthogonal to the transport direction than the recording materials on which images are being formed in the course of continuous image formation.

Abstract: 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.

Abstract: A flickering number in an electric-discharge lamp 7 is counted in a flickering number counting unit 23a, a flickering number in an electric-discharge lamp 8 is counted in a flickering number counting unit 23b, and the lighting of the electric-discharge lamp 7 or 8 is inhibited by a lamp-lighting inhibiting unit 24a or 24b in cases where the flickering number in the electric-discharge lamp 7 or 8 exceeds a regular number.

Abstract: An image heating apparatus includes a heat generating element for generating heat upon electric energization; a substrate supporting the heat generating element; a temperature detecting member for detecting a temperature of the substrate; an A/D converter for A/D conversion of an output of the temperature detecting means; photo-coupling means for converting an output of the A/D converter to a light signal and outputting the light signal; and abnormality detecting means for detecting an abnormal temperature on the basis of an output of the photo-coupling means.

Abstract: An gas-discharge lamp lighting apparatus includes: a power conditioning unit regulating a 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 comprising 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 an 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.

Abstract: A gas discharge lamp lighting device comprises a DC/DC converter (2) for adjusting electric power supplied from a power supply so as to generate and output a DC voltage, and an FET (5) electrically connected to the DC/DC converter (2), for converting the DC voltage from the DC/DC converter (2) to an AC voltage to be supplied to a gas discharge lamp (12). A control unit (14) brings the gas discharge lamp (12) to an electrode heating state in which both electrodes of the gas discharge lamp (12) are heated after supplying the AC voltage to the gas discharge lamp. The control unit (14) controls an amount of energy to be supplied to the gas discharge lamp (12) placed in the electrode heating state according to a voltage across the gas discharge lamp. The control unit (14) brings the gas discharge lamp (12) to an AC discharging state in which an AC current flows through the gas discharge lamp (12) after the amount of energy has been supplied to the gas discharge lamp (12).

Abstract: A flickering number in an electric-discharge lamp 7 is counted in a flickering number counting unit 23a, a flickering number in an electric-discharge lamp 8 is counted in a flickering number counting unit 23b, and the lighting of the electric-discharge lamp 7 or 8 is inhibited by a lamp-lighting inhibiting unit 24a or 24b in cases where the flickering number in the electric-discharge lamp 7 or 8 exceeds a regular number.

Abstract: 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.

Abstract: 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.