Abstract: An image forming system includes image forming apparatuses that communicate with each other via a network. Each of the image forming apparatuses includes a network computer, a power saving controller for applying a power saving control in a first power saving mode in which a supply of power to a printing function portion that forms an image on a sheet is stopped and a power is fed to the network controller when the apparatus acts as a main apparatus, and applying a power saving control in a second power saving mode in which a supply of power to the printing function portion and the network controller is stopped when the apparatus acts as subordinate apparatus, and a main apparatus deciding unit for deciding the image forming apparatus out of the plurality of image forming apparatuses based on a calculation of power consumption of the plurality of image forming apparatuses.

Abstract: There is provided an image forming apparatus includes: a first electric-power supply path, through which electric power is supplied from a commercial electric power supply to the apparatus when the first electric-power supply path is in closed state; a second electric-power supply path, through which electric power is supplied from the commercial electric power supply to the apparatus when, at least, a detecting unit has detected that the first electric-power supply path is in the open state; and a plurality of drive-voltage generating units, each of which converts a voltage fed from the electric power supply through any one of the first electric-power supply path and the second electric-power supply path into a predetermined drive voltage; a plurality of systems, to each of which the drive voltage converted by a corresponding one drive-voltage generating unit of the drive-voltage generating units is fed.

Abstract: An image output apparatus, which outputs an image on a recording medium, and which is activated in an activation mode including a first activation mode and a second activation mode that consumes less power than the first activation mode, the image output apparatus including: a switching unit that selects one of the first activation mode and the second activation mode as the activation mode for activating the image output apparatus; and a storage unit that stores a total amount of power consumed on and after a reference time. The switching unit switches the activation mode from the first activation mode to the second activation mode when the amount of total power consumption stored in the storage unit is equal to or more than a first threshold value.

Abstract: An electric power relaying unit of an image forming apparatus which includes an electric power blocking unit which selectively blocks the alternating current electric power output from the electric power input unit to be input to the electric power output unit, the electric power blocking unit including: a switching unit which switches an input of the alternating current electric power with respect to the electric power output unit; an electric power detecting unit which detects an electric power property; a memory unit in which a predetermined electric power property information is stored; and a control unit which controls a switching operation of the switching unit if determining that the detected electric power property corresponds to a predetermined electric power property in a failure of the image forming apparatus main body from a comparison result.

Abstract: A power saving processing apparatus that includes a processing unit, an output unit and a transition unit is provided. The processing unit is configured to transition from a first state where power is supplied to a second state where power supply is restricted, executes a first process required for such transition before transition from the first state to the second state, and executes a second process to output a first signal after executing the first process. The output unit outputs a second signal after receiving the first signal output from the processing unit, and outputs the second signal when not receiving the first signal output from the processing unit within a predetermined time period after a predetermined time after the first process starts. The transition unit transitions the processing unit to the second state after receiving the second signal output from the output unit.

Abstract: An image forming apparatus including an image forming unit to form an image, a user switch unit to output a user operation signal to switch between a power-on state and a power-off state of the image forming apparatus, a main controller to control the image forming unit and to output a power control signal based on the user operation signal, a power switching unit to selectively supply operation power to the main controller based on the user operation signal and the power control signal, and an auxiliary controller to control the power switching unit such that the operation power is not supplied to the main controller when the power control signal is changed in a power-off state.

Abstract: A constant current-type high-voltage power supply apparatus which is used in an image forming apparatus includes a leakage current detection unit that detects a leakage current leaked from at least one output terminal of the constant current-type high-voltage power supply apparatus and outputs the detected leakage current, a direct current voltage output unit that outputs different direct current (DC) voltages according to whether the leakage current detected by the leakage current detection unit is input, and a power control unit that controls power supply to the constant current-type high-voltage power supply apparatus according to the output DC voltage.

Abstract: An image forming capable of operating with reliability and shortening the down time. An operation unit forms an image. A power source unit supplies electric power supplied from an external power source to the operation unit. A storing unit stores successful data which shows that the image forming apparatus has started successfully. A mode selection unit selects a first mode in which regular electric power is supplied to the operation unit at a start-up when the storing unit stores the successful data, and a second mode in which electric power smaller than the regular electric power is supplied to the operation unit at the start-up when the storing unit does not store the successful data. A power control unit controls the electric power supplied from the power source unit to the operation unit according to the mode selected by the mode selection unit.

Abstract: Provided is a method of controlling electric power of a coil which performs induction heating in an imaging apparatus. The method includes: detecting an input current of the coil; detecting a resonant current of the coil; calculating a difference between the detected resonant current and the detected input current; and controlling electric power supplied to the coil based on the difference. These operations are repeatedly performed whenever the detected input current is changed.

Abstract: An image forming apparatus includes a fixing roller to fix a toner on a recording medium; a heater to heat the fixing roller; an alternating current (AC) power source to generate an AC electric power such that the heater heats the fixing roller according to the AC electric power; a unit interposed between the heater and the AC power source to selectively supply the AC electric power from the AC power source to the heater so as to control the heater to heat the fixing roller; a relay including a first relay contact point disposed on a first AC power supply line between the AC power source and the unit and a relay coil to open and close the first relay contact point; the relay selectively supplying the AC electric power from AC power source to the heater and the power control switch; a direct current (DC) power supplier to supply a DC power to the relay coil; and a thermoswitch interposed on a DC power supply line between the DC power supplier and the relay coil to control the supply of the AC electric power fr

Abstract: Methods and apparatus for adjusting printing device power consumption based on previously acquired usage data. The printing device has multiple energy consumption states including at least a ready state in which the printing device is ready to commence processing of a print job immediately upon receipt and including at least a low power state where the printing device is not ready to commence processing of a newly received print job. Acquired usage data includes parameters of print jobs submitted during a data collection period of time. The parameters may include time and date of submitted print jobs. Based on the usage data a usage profile is determined. The usage profile identifies one or more high usage periods of time and one or more low usage periods of time. Methods and apparatus then switch the printing device among the multiple energy consumption states based on the usage profile.

Abstract: An image forming apparatus that is capable of preventing an abnormal operation due to a voltage drop of a commercial power source and continuing an image forming operation efficiently even if the voltage drop occurs. A fixing unit fixes a toner image transferred onto a sheet. A voltage detection unit detects an input voltage of the commercial power source. A setting unit sets a fixing electric power supplied to the fixing unit from the commercial power source. A control unit suspends an operation when the set fixing electric power is less than a predetermined electric power and when the input voltage is less than a first voltage, and to continue the operation while reducing the set fixing electric power when the set fixing electric power is not less than the predetermined electric power and when the input voltage is less than a second voltage.

Abstract: A high-voltage power supply usable in an image forming apparatus includes a power transformation unit that generates an alternate-current (AC) voltage by transforming a voltage applied to the high-voltage power supply and a plurality of rectification units that are connected to the power transformation unit in order to rectify the AC voltage into different DC voltages, respectively.

Abstract: Methods and apparatus for adjusting printing device power consumption based on previously acquired usage data. The printing device has multiple energy consumption states including at least a ready state in which the printing device is ready to commence processing of a print job immediately upon receipt and including at least a low power state where the printing device is not ready to commence processing of a newly received print job. Acquired usage data includes parameters of print jobs submitted during a data collection period of time. The parameters may include time and date of submitted print jobs. Based on the usage data a usage profile is determined. The usage profile identifies one or more high usage periods of time and one or more low usage periods of time. Methods and apparatus then switch the printing device among the multiple energy consumption states based on the usage profile.

Abstract: An image formation apparatus includes a reception section, a function section, an image formation section and a power output device. The reception section is configured to be connected to a communication line over which image information and power are transmitted. The reception section receives the image information and the power transmitted over the communication line. The function section receives supply of the power received by the reception section, to function. The image formation section forms an image on a medium based on the image information received by the reception section or the function section. The power output device receives power supply from a commercial power supply. The power output device outputs power of a predetermined voltage to the image formation section.

Abstract: An image processing apparatus is provided that includes plural devices, a device control unit associated with each of the devices for controlling a power status of each of the devices according to a relevant power mode, and power mode setting unit for setting the relevant power mode to the device control unit.

Abstract: A power supply includes a transformer to transform an input voltage into an output driving voltage for one of a plurality of components of an image forming apparatus, and an output converter to detect the driving voltage being output from the transformer, to amplify the detected driving voltage according to a power control signal, and to output the amplified driving voltage to at least one remaining component in the plurality of components of the image forming apparatus. The power supply can not only control high voltage outputs individually, but also reduces the number of switching transformers being used, as it uses at least one shared switching transformer.

Abstract: Provided is an image forming apparatus having a network connecting portion, a control portion, and a status information storage portion. When a status request is sent from an external apparatus while the image forming apparatus is in a power-saving status, based on a condition set by a setting portion, the control portion makes a determination of whether (a) to perform supply of power to the main body of the image forming apparatus and acquire a status information to transmit it through the network portion or (b) not to perform supply of power to the main body of the image forming apparatus, but to transmit through the network portion a status information that has been stored in the status information storage portion before the status request, and performs controls based on the determination.

Abstract: The present invention provides a low-cost and safe image forming apparatus that has a first state in which first and second resistance heating bodies of a heater are connected in series, a second state in which the first and second resistance heating bodies are connected in parallel, and a third state in which a first switching unit shuts off a power supply path and a second switching unit is connected to a first power source terminal to block power supply to the heater.

Abstract: This disclosure provides power supply control methods and apparatus. According to one aspect of the disclosure, a method of operating a power supply operatively connected to a developer unit associated with a printing apparatus is disclosed. The method includes generating a modified output control signal as a function of stored gain and offset values associated with the power supply to generate a desired output voltage to drive the developer unit.

Abstract: An image forming apparatus includes an image forming unit for forming an image using a consumable supply; a cover attached to the image forming unit; an energy accumulation unit for accumulating energy when the cover is closed; an energy initializing unit for initializing a level of the energy accumulated in the energy accumulation unit when the cover is opened; an energy detection unit for detecting whether the level of the energy accumulated in the energy accumulation unit is initialized; and a state correction unit for correcting a state of the image forming unit according to a detection result of the energy detection unit.

Abstract: An electronic device and an image forming apparatus capable of notifying that a voltage drop will occur during operation of the device due to an abnormality of a power source facility before actual operations. A load is configured to operate on electric power supplied from a commercial power source. A detection unit is configured to detect a source voltage input from the commercial power source. A storage unit is configured to store an operation guarantee voltage value that is required for operation of said load. A control unit is configured to control electric power applied to said load. A notification unit configured to perform notification.

Abstract: Embodiments of the present invention include an image bearing member arranged to bear an electrostatic latent image, a charging member contacting the image bearing member to charge a surface of the image bearing member with application of a DC voltage to the charging member, a current detection unit arranged to detect a DC current flowing in the charging member, and a control unit configured to control the voltage applied to the charging member, wherein a plurality of different DC voltages are successively applied to the charging member during a period of no image formation until a change amount of change in the DC current with respect to change in the DC voltage becomes not larger than a predetermined value, and the control unit controls a DC voltage applied to the charging member during a period of image formation based on a result detected by the current detection unit.

Abstract: An image forming apparatus according to an embodiment includes a solar panel, an electric storage unit which is supplied with electric power from the solar panel and a commercial power supply and stores electricity, a power supply disconnection detecting unit which detects power supply disconnection from the commercial power supply, and a maintenance control unit for power supply disconnection which carries out maintenance control using stored electricity from the solar panel if the power supply disconnection from the commercial power supply is detected by the power supply disconnection detecting unit.

Abstract: The voltage detection device includes a first voltage detection part for detecting whether or not a time period ratio during which a voltage of an AC power supply is equal to or larger than a first threshold value is equal to or larger than a first ratio and a second voltage detection part for detecting whether or not a time period ratio during which the voltage of the AC power supply is lower than the first threshold value and equal to or larger than a second threshold value is equal to or larger than a second ratio higher than the first ratio, and determines whether the voltage of the AC power supply is a first commercial voltage or a second commercial voltage lower than the first commercial voltage based on results obtained by the first voltage detection part and by the second voltage detection part.

Abstract: An image forming apparatus which can individually detect contact fusion of relays in a circuit configuration in which the relays are connected to respective both ends of a fixing heater. A first relay and a second relay are each connected between a power source and the fixing heater. The presence or absence of an input voltage to the fixing heater is detected on paths from the first relay to the fixing heater and from the second relay to the fixing heater. When the input voltage is detected in a state in which the first relay is on and the second relay is off, it is determined that the second relay has failed. When the input voltage is detected in a state in which the first relay is off and the second relay is on, it is determined that the first relay has failed.

Abstract: A printing apparatus includes a detection signal receiving device that receives a detection signal from a computer; where a printable condition determining device subsequently determines whether a predetermined printable condition is satisfied; where a power-ON device subsequently turns-ON the main power supply of the printing apparatus; and where a control device subsequently executes print preparation processing; wherein when the power-ON device turns-ON the main power supply of the printing apparatus, the printing apparatus is in sleep mode or energy saving mode in which electric power is supplied only to the control device and the detection signal receiving device; and the printing apparatus includes a power supply portion equipped with a battery, and when a power supply is started, first, the printing apparatus turns into sleep mode or energy saving mode in which electric power is supplied only to the control device and the detection signal receiving device.

Abstract: An image forming apparatus, including: a fixing device having: a first heat generator for generating heat for a fixing processing, the first heat generator using electric power supplied by a commercial power source; and a second heat generator for generating heat for the fixing processing, the second heat generator using electric power supplied by the auxiliary power source device; a heat generation controller for allowing the first heat generator and the second heat generator to generate heat; a sheet jam detector for detecting a sheet jam of a recording sheet which occurs in the image forming section having the fixing device and a conveyance path of a recording sheet; and a charge controller for allowing charging of the auxiliary power source device to start when the sheet jam detector detects a sheet jam, and the charged capacity detector detects no full charge of the auxiliary power source device.

Abstract: A control apparatus connected to the plurality of image processing apparatuses by way of a network judges whether to apply current to a data processing unit held by the image processing apparatus based on a predetermined current application judging rule and transmits a result of judgment to the image processing apparatus. Each image processing apparatus, in the case of receiving the result of judgment of whether to apply current to the data processing unit through a NIC from the control apparatus, controls a current application state of the data processing unit based on the result of judgment. The data processing unit is divided in a plurality of functional blocks, and the current application to the data processing unit is controlled, functional block by functional block.

Abstract: Methods and apparatus for adjusting printing device power consumption based on previously acquired usage data. The printing device has multiple energy consumption states including at least a ready state in which the printing device is ready to commence processing of a print job immediately upon receipt and including at least a low power state where the printing device is not ready to commence processing of a newly received print job. Acquired usage data includes parameters of print jobs submitted during a data collection period of time. The parameters may include time and date of submitted print jobs. Based on the usage data a usage profile is determined. The usage profile identifies one or more high usage periods of time and one or more low usage periods of time. Methods and apparatus then switch the printing device among the multiple energy consumption states based on the usage profile.

Abstract: An electric power control apparatus sets a first period for performing electric power control and an overall target amount of power consumption to be consumed by all of the plurality of information processing apparatuses during the first period, calculates an individual target amount of power consumption to be consumed by each information processing apparatuses during a plurality of second periods obtained by segmentalizing the first period, based on the first period and the overall target amount, transmits the corresponding second period and the individual target amount to each information processing apparatuses, receives an actual usage value of the amount of power consumption in the corresponding second period transmitted from each information processing apparatuses, calculates the individual target amount, based on the actual usage value of the amount and the overall target amount, and retransmits the individual target amount to each information processing apparatuses.

Abstract: A fixing device usable with an image forming apparatus having a fixing roller to fix a toner on a recording medium, a heater to heat the fixing roller, and an alternating current (AC) power source to supply an AC electric power to the heater may include a power converting part to convert the AC electric power of the AC power source and to supply the converted power to the heater; a relay including a first relay contact point disposed on a first AC power supply line between the AC power source and the power converting part and a relay coil to open and close the first relay contact point, the relay selectively supplying the AC electric power from the AC power source to the heater and the power converting part; a direct current (DC) power supplier to supply a DC power to the relay coil; and a thermoswitch interposed between the relay coil and the DC power supplier and mounted adjacent to the fixing roller so as to interrupt the DC power from the DC power supplier to the relay coil, when a temperature of the fixi

Abstract: Methods and apparatus for adjusting printing device power consumption based on previously acquired usage data. The printing device has multiple energy consumption states including at least a ready state in which the printing device is ready to commence processing of a print job immediately upon receipt and including at least a low power state where the printing device is not ready to commence processing of a newly received print job. Acquired usage data includes parameters of print jobs submitted during a data collection period of time. The parameters may include time and date of submitted print jobs. Based on the usage data a usage profile is determined. The usage profile identifies one or more high usage periods of time and one or more low usage periods of time. Methods and apparatus then switch the printing device among the multiple energy consumption states based on the usage profile.

Abstract: A power supply, which outputs a plurality of voltages in order to improve the cross regulation between output voltages and at the same time reduce the amount of electric power consumed, and an image forming device having the same are disclosed. The power supply includes a power converter, which generates a first output power source and a second output power source in response to an external power supply and a power control signal, respectively; a power output part, which includes output parts to rectify and smooth each of the first and second output power sources; a first output controller, which receives the first output power source feedback from the power output part to generate the power control signal; and a second output controller, which receives the second output power source feedback from the power output part to control to operate the power output part in stable mode.

Abstract: An output system having an output device that performs output based on output data so that the output device performs the output after having acquired authentication. In the system, an operating state controlling unit outputs a power-save-cancel command for causing a power-saving state to be changed into an active state to a power-save switching unit after a device having an output data storing unit acquires the output data, and a transition-to-power-save command for causing the state to be changed from the active state to the power-saving state is outputted to the power-save switching unit when the output process of the output data is completed by an output process completion detecting unit.

Abstract: The image forming apparatus includes an image forming part, a fixing part including a heater and a temperature detection element; and a power-control part that controls power to be supplied to the heater according to the detection temperature of the temperature detection element, wherein during the power to be supplied to the heater is controlled so as to keep the detection temperature at a control target temperature, if the on-duty ratio selected so to keep the detection temperature at the control target temperature is a specific on-duty ratio and the specific on-duty ratio continues for a predetermined number of cycles, the power-control part switches to another control cycle different in the number of consecutive half-waves of the AC waveform from the control cycle.

Abstract: Recording of time information and function information of each image forming process for which processing has been completed in a recording portion 64 (S1), judgment (S6) of whether or not a switching time that has been set is 0 for processing in which the elapsed time from completion to the present time is within a predetermined time for processing among the information in the recording portion (64), calculation (S7) of a time (T) in which the switching time is added to the completion time of each image forming process, comparison (S8) of the time (T) and a time information (Tmax), and update (S9) of the time information (Tmax) by the time (T) when the calculated time (T) is later than the time information (Tmax) are repeatedly executed, and the latest time is set to the time information (Tmax). Switching is made to a power-saving mode when a counter (66) has timed the time information (Tmax).

Abstract: The embodiments disclosed herein are directed to methods and devices for a control system to regulate the output voltage of a high voltage power supply (HVPS) in an image forming device. In one embodiment, the HVPS comprises at least two voltage sources connected in series. A print engine controller is configured to disable at least one of the voltage sources when a voltage draw of a load exceeds a maximum differential voltage of the at least two voltage sources.

Abstract: A heating device includes: a heat generating unit generating heat in response to energization of an alternating-current power supply; a zero-crossing signal generating circuit generating a zero-crossing signal in synchronization with a zero-crossing time of the alternating-current power supply; an energization regulating unit regulating an energization period of the heat generating unit by the alternating-current power supply; a voltage change rate detecting unit detecting whether a rate of voltage change of the alternating-current power supply at the zero-crossing time is equal to or larger than an predetermined value; a switching unit switching on and off a connection between the alternating-current power supply and the heat generating unit; and an energization disabling unit disabling energization of the heat generating unit by controlling the switching unit when the rate of voltage change is equal to or larger than the predetermined value.

Abstract: A power supply device supplies power to an image forming apparatus. The image forming apparatus includes a load and a control unit. The load requires power, and is controlled by the control unit. The power supply includes a capacitor and a power-supply unit. The capacitor is charged by an external power source, and dischargably stores therein power. The power-supply unit provides power supply from the capacitor to the load and the control unit before voltage of the external power source drops below a threshold level where malfunction of the image forming apparatus occurs. After the voltage recovers to the threshold level, the power-supply unit stops the power supply from the capacitor.

Abstract: A power saving processing apparatus that includes a processing unit, an output unit and a transition unit is provided. The processing unit is configured to transition from a first state where power is supplied to a second state where power supply is restricted, executes a first process required for such transition before transition from the first state to the second state, and executes a second process to output a first signal after executing the first process. The output unit outputs a second signal after receiving the first signal output from the processing unit, and outputs the second signal when not receiving the first signal output from the processing unit within a predetermined time period after a predetermined time after the first process starts. The transition unit transitions the processing unit to the second state after receiving the second signal output from the output unit.

Abstract: An image forming apparatus and a method of monitoring power consumption of the image forming apparatus are provided. For each one of parts of the image forming apparatus selected for monitoring, part-specific power consumption information is obtained based on accumulated operation amount information. The obtained part-specific power consumption information is used to generate power consumption information indicating an amount of electric power consumed by at least a portion of the image forming apparatus.

Abstract: An image forming apparatus according to the present invention includes: a fixing part having a heater; a control part controlling ON/OFF of power distribution to the heater; a power source part generating a voltage for driving the control part; a main switch for turning ON/OFF power supply from outside to the power source part; and an interrupt signal generation part generating a periodical interrupt signal. The control part, based on the interrupt signal, controls ON/OFF of the power distribution to the heater, turns OFF power supply to the heater upon passage of predetermined time since disappearance of the interrupt signal, and judges that an error has occurred, when the control part is still driving after passage of driving stop time from when the main switch is turned OFF to when the control part stops its driving since the disappearance of the interrupt signal.

Abstract: A constant current-type high-voltage power supply apparatus which is used in an image forming apparatus includes a leakage current detection unit that detects a leakage current leaked from at least one output terminal of the constant current-type high-voltage power supply apparatus and outputs the detected leakage current, a direct current voltage output unit that outputs different direct current (DC) voltages according to whether the leakage current detected by the leakage current detection unit is input, and a power control unit that controls power supply to the constant current-type high-voltage power supply apparatus according to the output DC voltage.

Abstract: When the time period is night, processing advances to step S13 to set the initialization speed of a line feed motor to the first speed (v1), and to step S15 to execute initialization operation of the line feed motor at the first speed (v1). When the time period is morning or daytime, the processing advances to step S12 to detect a cover open/closed state. When the cover is open, the processing advances to step S13 to set the initialization speed of the line feed motor to the first speed (v1). When the cover is closed, the processing advances to step S14 to set the initialization speed of the line feed motor to the second speed (v2) which is higher than the first speed (v1). The processing advances to step S15 to execute initialization operation of the line feed motor at the second speed (v2).

Abstract: An image forming apparatus includes: an attachment unit configured to receive at least one voltage and being replaceable with a test tool, a controller for controlling operation of a plurality of voltage generating circuits, a current detecting section and a deciding section. The controller is configured to control a first voltage generating circuit so as to generate a test voltage and so as to apply the test voltage through a first voltage line, the test tool, and a second voltage line to a second voltage generating circuit. The deciding section is configured to, upon a detection current corresponding to the applied test voltage and detected by the current detecting section being equal to or greater than a first predetermined value, decide that the predetermined voltages are to be normally applied through the respective first and second voltage lines to the attachment unit.

Abstract: A power source device includes a main power source for outputting a direct current voltage with a specific value; a monitoring unit connected to the main power source for comparing the direct current voltage with a reference voltage to monitor whether a malfunction occurs in the main power source; and a monitoring display unit connected to the monitoring unit. The monitoring unit includes a comparison unit for comparing the direct current voltage with the reference voltage, and a monitoring control unit for detecting a signal of the comparison unit and for storing and displaying the direct current voltage on the monitoring display unit when the malfunction occurs in the main power source.

Abstract: A power supply includes a transformer to transform an input voltage into an output driving voltage for one of a plurality of components of an image forming apparatus, and an output converter to detect the driving voltage being output from the transformer, to amplify the detected driving voltage according to a power control signal, and to output the amplified driving voltage to at least one remaining component in the plurality of components of the image forming apparatus. The power supply can not only control high voltage outputs individually, but also reduces the number of switching transformers being used, as it uses at least one shared switching transformer.

Abstract: Disclosed is an image forming apparatus, a sheet finisher and an image forming system; each of them including: a display for displaying a work item for a maintenance in the form of a guidance display; a detection section for detecting whether the work item is executed or not; an energization controller for supplying/blocking power supply to electric components to be maintained; a connection judging section for judging whether the electric components are electrically connected with the power supply or not; and a controller for controlling the display to switch displays of the work item and for controlling the energization controller, in accordance with a detection result of the detection section; wherein the controller causes the display to display an alarm and a guidance display of a corresponding work, according to a judgment of the connection judging section.

Abstract: Provided is a method of controlling electric power of a coil which performs induction heating in an imaging apparatus. The method includes: detecting an input current of the coil; detecting a resonant current of the coil; calculating a difference between the detected resonant current and the detected input current; and controlling electric power supplied to the coil based on the difference. These operations are repeatedly performed whenever the detected input current is changed.