Abstract: An electric power supplying device includes a main power supply that supplies electric power to each component of an apparatus, an auxiliary power supply that supplies electric power to an assisted component in the apparatus, the assisted component requiring power supply during start-up time of the apparatus and having a whose start-up time being equal to or longer than a predetermined period of time, a discharging control circuit that controls the auxiliary power supply to cause the auxiliary power supply to output a voltage, the output voltage being lower than a voltage output by the main power supply and being equal to or more than a lower limit voltage of a voltage range that the assisted component is operable, and a power supply prevention circuit that prevents the auxiliary power supply from supplying power to a component other than the assisted component in the apparatus.

Abstract: An electric power supplying device includes a main power supply that supplies electric power to each component of an apparatus, an auxiliary power supply that supplies electric power to an assisted component in the apparatus, the assisted component requiring power supply during start-up time of the apparatus and having a whose start-up time being equal to or longer than a predetermined period of time, a discharging control circuit that controls the auxiliary power supply to cause the auxiliary power supply to output a voltage, the output voltage being lower than a voltage output by the main power supply and being equal to or more than a lower limit voltage of a voltage range that the assisted component is operable, and a power supply prevention circuit that prevents the auxiliary power supply from supplying power to a component other than the assisted component in the apparatus.

Abstract: A commercial AC power shutdown detecting apparatus includes a photocoupler including a light-emitting element and a light-receiving element, a lighting circuit that flows a pulsating current through the light-emitting element of the photocoupler to turn on and off light of the light-emitting element, a charging-discharging circuit including a capacitor and a resistor that charges the capacitor via the resistor when the light-emitting element is turned off, and discharges the capacitor via the light-receiving element and the a resistor when the light-emitting element is turned on, and a comparing circuit that compares a voltage value between capacitor terminals with a predetermined voltage value intermediate between a maximum voltage value between the capacitor terminals when the light-emitting element repeats turning light on and off and the consistent DC voltage value, and outputs a shutdown detection signal if the voltage value between the capacitor terminals exceeds the predetermined voltage value.

Abstract: A switch device includes a switch operation unit to be mechanically operated so as to be in on or off state; a detecting unit configured to detect whether the switch operation unit is in the on or off state; a first mechanism to be configured to close electrical contacts of at least one circuit when the switch operation unit is operated to be in the on state; and a second mechanism configured to maintain the electrical contacts in an closed state and switch the electrical contacts to an open state in response to electrical signals indicating off, on, and, off to be received sequentially while the switch operation unit is in the off state.

Abstract: A system includes a switch operation unit configured to be mechanically operated to be in on or off state; a detecting unit configured to detect whether the switch operation unit is in on or off state; a first mechanism configured to close electrical contacts of at least one circuit when the switch operation unit is operated to be in on state; a second mechanism configured to maintain the contacts in closed state and switch the contacts to open state in response to electrical signals of off, on, and, off while the switch operation unit is in off state when the switch operation unit is operated to be in off state; and a first unit configured to notify a user of an abnormal state when the contacts are in the closed state and the switch operation unit is in off state at start of control.

Abstract: A fixing control device includes an image detection unit that determines presence of an image in each of areas obtained by division of an image formation region in which the image is formed, a heater selection unit that selects from heaters of a fixing device heaters at positions corresponding to areas in which the presence of the image is determined, a heating amount computation unit that computes a heating amount of a heating area heated by each of the selected heaters in a fixing region corresponding to the image formation region, a change amount computation unit that computes an amount of change of the heating amount between adjoining ones of the heating areas, and a heating amount correction unit that corrects one of the heating amounts of the adjoining heating areas so that the amount of change after the correction is less than a predetermined threshold.

Abstract: An image forming apparatus includes a plurality of power generation units, a charge control unit, a charge switch unit, and a controller, Each of the plurality of power generation units is respectively provided to a corresponding one of a plurality of high-temperature portions in the image forming apparatus to generate power based on temperatures of the high-temperature portions. The charge control unit charges a power storage unit with electrical energy generated by the power generation units. The charge switch unit switches between the power generation units to connect one of the power generation units to the charge control unit. The controller controls the charge switch unit to selectively connect one of the power generation units capable of achieving a maximum power generation efficiency to the charge control unit.

Abstract: A fixing control device includes an image detection unit that determines presence of an image in each of areas obtained by division of an image formation region in which the image is formed, a heater selection unit that selects from heaters of a fixing device heaters at positions corresponding to areas in which the presence of the image is determined, a heating amount computation unit that computes a heating amount of a heating area heated by each of the selected heaters in a fixing region corresponding to the image formation region, a change amount computation unit that computes an amount of change of the heating amount between adjoining ones of the heating areas, and a heating amount correction unit that corrects one of the heating amounts of the adjoining heating areas so that the amount of change after the correction is less than a predetermined threshold.

Abstract: A power detecting apparatus detects electrical power consumed by a load by multiplication of voltage information detected by a voltage detecting unit and current information detected by a current detecting unit. The power detecting apparatus includes: a switching unit including a single pole double throw relay that switches between a first circuit, in which a current flows through both of the voltage detecting unit and the current detecting unit, and a second circuit, in which a flow of a current to the voltage detecting unit is interrupted and a current flows through a bypass path to bypass the current detecting unit; and a control unit that performs control to switch to the first circuit when the power detection is to be performed, and control to switch to the second circuit when the power detection is not to be performed.

Abstract: A switch device includes: a switch manipulation portion that is manipulated between an ON position and an OFF position; a detecting unit that detects which position the switch manipulation portion is positioned at, the ON position or the OFF position; a first mechanism that, when the switch manipulation portion is manipulated from the OFF position to the ON position, causes a first electrical contact point to enter an ON state; and a second mechanism that, when the switch manipulation portion is manipulated to the OFF position, causes the switch manipulation portion to enter an OFF state and to maintain the ON state of the first electrical contact point, and changes the state of the first electrical contact point to the OFF state by making an electrical signal be in an OFF state, an ON state, and an OFF state in this order.

Abstract: A system includes a switch operation unit configured to be mechanically operated to be in on or off state; a detecting unit configured to detect whether the switch operation unit is in on or off state; a first mechanism configured to close electrical contacts of at least one circuit when the switch operation unit is operated to be in on state; a second mechanism configured to maintain the contacts in closed state and switch the contacts to open state in response to electrical signals of off, on, and, off while the switch operation unit is in off state when the switch operation unit is operated to be in off state; and a first unit configured to notify a user of an abnormal state when the contacts are in the closed state and the switch operation unit is in off state at start of control.

Abstract: A switch device includes a switch operation unit to be mechanically operated so as to be in on or off state; a detecting unit configured to detect whether the switch operation unit is in the on or off state; a first mechanism to be configured to close electrical contacts of at least one circuit when the switch operation unit is operated to be in the on state; and a second mechanism configured to maintain the electrical contacts in an closed state and switch the electrical contacts to an open state in response to electrical signals indicating off, on, and, off to be received sequentially while the switch operation unit is in the off state.

Abstract: A storage unit stores therein a first correction amount and a second correction amount for correcting a first output amount of a first device. A correcting unit corrects, when the first output amount is smaller than a first target value, the first output amount based on a second output amount of a second device that is operated by the first output amount, a second target value of the second output amount, and the first correction amount, and otherwise, the first output amount based on the second correction amount. A control unit controls the first device to output the first output amount that is corrected by the correcting unit.

Abstract: A switch device includes: a switch manipulation portion that is manipulated between an ON position and an OFF position; a detecting unit that detects which position the switch manipulation portion is positioned at, the ON position or the OFF position; a first mechanism that, when the switch manipulation portion is manipulated from the OFF position to the ON position, causes a first electrical contact point to enter an ON state; and a second mechanism that, when the switch manipulation portion is manipulated to the OFF position, causes the switch manipulation portion to enter an OFF state and to maintain the ON state of the first electrical contact point, and changes the state of the first electrical contact point to the OFF state by making an electrical signal be in an OFF state, an ON state, and an OFF state in this order.

Abstract: A power source is disclosed. The power source includes a first power source applying a first voltage to a control unit and a second power source applying a second voltage to a unit controlled by the control unit. The power source includes a first power supplying unit, which includes a main power switch and a first relay and supplies electric power to the first power source, and a second power supplying unit, which includes the main power switch and a second relay and supplies the electric power to the second power source. The electric power is supplied to the first power source by turning on the main power switch, and the first relay is turned on by a voltage output from the second power source. The electric power is supplied to the second power source by turning on the second relay by a voltage output from the first power source.

Abstract: A storage unit stores therein a first correction amount and a second correction amount for correcting a first output amount of a first device. A correcting unit corrects, when the first output amount is smaller than a first target value, the first output amount based on a second output amount of a second device that is operated by the first output amount, a second target value of the second output amount, and the first correction amount, and otherwise, the first output amount based on the second correction amount. A control unit controls the first device to output the first output amount that is corrected by the correcting unit.

Abstract: A printer includes a line-type inkjet printer, sheet feed trays, and a sheet receiving tray. The line-type inkjet printer includes a conveying unit that conveys a transfer sheet in a nearly vertical direction and an inkjet unit that discharges ink on an entire area in a width direction of the transfer sheet that is conveyed by the conveying unit from a direction perpendicular to the transfer sheet and forms an image on the transfer sheet. The line-type inkjet printer further includes a maintenance mechanism that maintains the inkjet unit and a controller that controls maintenance of the inkjet unit.

Abstract: A power-supply control unit is connected in series on a power line between a power supply unit and an operating unit, and controls turning on/off of the power supply from the power supply unit to the operating unit. A resistor having a predetermined resistance is connected in series with the power-supply control unit. A switch unit is connected in parallel with the resistor. A switch control unit detects turning on of the power supply from the power supply unit to the operating unit by the power-supply control unit, and turns on the switch unit in a predetermined waiting time after detecting the turning on of the power supply.

Abstract: A heater device includes a heating unit which includes a heating element that generates heat using an induction-heating method. A power supply part supplies a driving current to the heating unit. A first high-frequency component cutoff unit is connected to the power supply part. A switching unit controls the supply of the driving current from the power supply part to the heating unit. A second high-frequency component cutoff unit is connected to the switching unit. And a connection unit connects the first high-frequency component cutoff unit and the second high-frequency component cutoff unit.

Abstract: A power source is disclosed. The power source includes a first power source applying a first voltage to a control unit and a second power source applying a second voltage to a unit controlled by the control unit. The power source includes a first power supplying unit, which includes a main power switch and a first relay and supplies electric power to the first power source, and a second power supplying unit, which includes the main power switch and a second relay and supplies the electric power to the second power source. The electric power is supplied to the first power source by turning on the main power switch, and the first relay is turned on by a voltage output from the second power source. The electric power is supplied to the second power source by turning on the second relay by a voltage output from the first power source.