Abstract: A portable communication terminal includes: in a portable body, a communication device that communicates with an external portion and a display device that displays information. The portable communication terminal includes: a host device position detector; a position information acquirer acquiring member position information, which is position information of a portable communication terminal owned by another member configuring a group with the owner; and a display controller that performs a shared-position-information display process in which the position of each of the portable communication terminals owned by group members is displayed together with a map, on a screen of the display device, based on the host device position information and the member position information.

Abstract: The image forming apparatus includes a fixing device that has a heater, and a required power calculation unit that determines a power Pfsr that is assumed to be required by the heater. Based on a difference between a required power that is determined by the required power calculation unit and a suppliable power, the image forming apparatus selects whether to start printing in a normal mode or to start printing in a power saving mode in which the power that is supplied to the heater is reduced in comparison to the normal mode. The power saving mode includes a plurality of modes, and when a CPU selects the power saving mode, the CPU selects one or a combination of modes from among the plurality of power saving modes based on the aforementioned difference.

Abstract: The power supply apparatus configured to supply power to a load includes a control unit that corrects a power amount calculated by a power calculation unit based on a first voltage of an AC power supply calculated by a voltage calculation unit when the power amount is calculated, and a second voltage of the AC power supply calculated by the voltage calculation unit when a switching unit is controlled to start power supply to a power supply and a first transformer from the AC power supply.

Abstract: The voltage detection apparatus includes a transformer, in which a primary side and a secondary side are insulated from each other and the primary side connected in parallel with a first line and a second line, configured to output from the secondary side a voltage supplied to the primary side according to an alternating voltage; a detection circuit configured to detect a frequency of an alternating voltage; and a correction unit configured to acquire information corresponding to a voltage output from the transformer and information corresponding to a frequency detected by the detection circuit, and that corrects the information corresponding to the voltage according to the information corresponding to the frequency.

Abstract: A two-dimensional code generation device includes an image acquisition unit acquiring, from a database, an image visually indicating a type of information to be provided by a two-dimensional code based on coding information, and a code generation unit generating the two-dimensional code based on the coding information. The coding information is information for generating the two-dimensional code. When the image acquisition unit acquires the image visually indicating the type of information to be provided by the two-dimensional code, the code generation unit includes the image acquired by the image acquisition unit in the two-dimensional code in a superimposed manner.

Abstract: The power supply apparatus includes a first line and a second line to each of which an AC voltage is input from an AC power supply; a conversion element configured to convert the AC voltage to be input to the first line or the second line into a current corresponding to the AC voltage; a voltage detection unit including a first current transformer, the first current transformer including a primary winding and a secondary winding, the voltage detection unit being configured to detect an AC voltage output from the secondary winding of the first current transformer through supply of the current converted by the conversion element to the primary winding; and a zero cross detection unit configured to detect a zero cross timing of the AC power supply based on the AC voltage detected by the voltage detection unit.

Abstract: An information acquisition system includes a communication terminal that reads an information code storing the point information and a service ID; and a server that stores point information and a service ID in association with each other, the communication terminal accessing the server and acquiring the point information from the server. The communication terminal extracts the point information and the service ID from the information code to transmit to the server the point information and the service ID. At a time of reception of the point information and the service ID, the server extracts, from the point information stored in the server, association point information corresponding to the point information that correlates with the service ID received from the communication terminal, and transmits the association point information to the communication terminal. The communication terminal outputs the point information, and the association point information received from the server.

Abstract: An image forming apparatus includes: a fixing portion for fixing an image, formed on a recording material, on the recording material, wherein the fixing portion includes a heater for generating heat by electric power supplied from a commercial power source; a power source portion for supplying the electric power to a load except the heater, wherein the power source and the heater are connected with the commercial power source in parallel; a suppliable electric power calculating portion for calculating suppliable electric power suppliable to the heater; and a temperature setting portion for setting, depending on the suppliable electric power calculated by the calculating portion, a control target temperature of the fixing portion in an operation in a stand-by mode in which the image forming apparatus awaits a print instruction.

Abstract: An information provision system includes: a reading section that reads an information code; a situation acquisition section that acquires a situation when the information code is read by the reading section; a determination section that determines a situation when the information code is read, based on (i) read information that is obtained by decoding the information code that is read and (ii) the situation acquired by the situation acquisition section; a provided information generation section that generates provided information that is different from the read information, the provided information matching with the situation when the information code is read; and a provision section that provides the provided information that is generated.

Abstract: A two-dimensional code generation device includes an image acquisition unit acquiring, from a database, an image visually indicating a type of information to be provided by a two-dimensional code based on coding information, and a code generation unit generating the two-dimensional code based on the coding information. The coding information is information for generating the two-dimensional code. When the image acquisition unit acquires the image visually indicating the type of information to be provided by the two-dimensional code, the code generation unit includes the image acquired by the image acquisition unit in the two-dimensional code in a superimposed manner.

Abstract: The power supply apparatus includes a first line and a second line to each of which an AC voltage is input from an AC power supply; a conversion element configured to convert the AC voltage to be input to the first line or the second line into a current corresponding to the AC voltage; a voltage detection unit including a first current transformer, the first current transformer including a primary winding and a secondary winding, the voltage detection unit being configured to detect an AC voltage output from the secondary winding of the first current transformer through supply of the current converted by the conversion element to the primary winding; and a zero cross detection unit configured to detect a zero cross timing of the AC power supply based on the AC voltage detected by the voltage detection unit.

Abstract: A fixing apparatus configured to include a rotational member having a conductive layer, a coil having a helical shape, a resonance circuit including a resonance capacitor and configured to be formed together with the rotational member and the coil, a first converter driving the resonance circuit, a second converter used to control power to be supplied to the first converter, a frequency setting unit configured to set a driving frequency of the first converter according to at least one of a size of the recording material and a temperature at a sheet non-passing portion of the rotational member, and a power control unit controlling the second converter according to a temperature at a sheet passing portion of the rotational member to control the power to be supplied to the first converter from the second converter, wherein the conductive layer is caused to generate heat by electromagnetic induction.

Abstract: A two-dimensional code generation device includes a determination unit, an image acquisition unit, and a code generation unit. The determination unit determines whether point information is included in coding information, which is information for generating a two-dimensional code. The image acquisition unit selecting, from an image database in which multiple images are registered, an image that visually indicates the point information as a base image and acquires the selected image as the base image when the determination unit determines that the point information is included in the coding information. The code generation unit generates the two-dimensional code based on the coding information, and includes the base image in the two-dimensional code in a superimposed manner when the base image is acquired by the image acquisition unit.

Abstract: An image forming apparatus includes: a power source portion; a fixing portion; and a controller. The controller sets a waveform of a current to be passed through each of first and second heat-generating-elements of the fixing portion in one control period so that, in a synchronous half wave in one control period, the current passes through one heat-generating-element from a halfway point of the half wave and the current passes through or does not pass through the other heat-generating-element throughout a half wave period. The controller sets a current supply starting timing of the current passing through the one heat-generating-element, at timing when a current passing toward the power source portion stops.

Abstract: An image forming apparatus includes an image forming unit, a fixing unit having a heater, a temperature detection unit, a power control unit, and a conveyance control unit that controls conveying a recording material. The conveyance control unit executes, when the maximum power is greater than a threshold power, a first mode where conveyance is performed according to a time, and executes, in a case where the maximum power is less than the threshold power, a second mode where conveyance is performed according to the detected temperature. The power control unit sets a larger value to the threshold power when an option device is connected to the image forming apparatus as compared to when the option device is not connected to the image forming apparatus.

Abstract: A fixing apparatus includes a tubular rotation member including a conductive layer, a helical coil, a resonance circuit, including a resonance capacitor, formed with the rotation member and the coil, a resonance inverter configured to control the resonance circuit, and a control unit configured to control electric power supplied to the resonance inverter, wherein the conductive layer generates heat with electromagnetic induction caused by magnetic flux generated through the coil, wherein the control unit sets a driving frequency of the resonance inverter according to at least one of a size of the recording medium and a temperature of a non-sheet-passing portion of the rotation member, and wherein the control unit changes a resonance frequency of the resonance circuit according to the set driving frequency.

Abstract: A fixing apparatus configured to include a rotational member having a conductive layer, a coil having a helical shape, a resonance circuit including a resonance capacitor and configured to be formed together with the rotational member and the coil, a first converter driving the resonance circuit, a second converter used to control power to be supplied to the first converter, a frequency setting unit configured to set a driving frequency of the first converter according to at least one of a size of the recording material and a temperature at a sheet non-passing portion of the rotational member, and a power control unit controlling the second converter according to a temperature at a sheet passing portion of the rotational member to control the power to be supplied to the first converter from the second converter, wherein the conductive layer is caused to generate heat by electromagnetic induction.

Abstract: An image forming apparatus includes: a fixing portion for fixing an image, formed on a recording material, on the recording material, wherein the fixing portion includes a heater for generating heat by electric power supplied from a commercial power source; a power source portion for supplying the electric power to a load except the heater, wherein the power source and the heater are connected with the commercial power source in parallel; a suppliable electric power calculating portion for calculating suppliable electric power suppliable to the heater; and a temperature setting portion for setting, depending on the suppliable electric power calculated by the calculating portion, a control target temperature of the fixing portion in an operation in a stand-by mode in which the image forming apparatus awaits a print instruction.

Abstract: In a fixing device, an alternating current is caused to flow through a coil so as to causes an electrically conductive layer of a rotating member to generate heat, and an unfixed image on a recording medium is heat fixed onto the recording medium by the heat generated by the electrically conductive layer. A frequency range of the alternating current is from 20.5 kHz to 100 kHz. With respect to a generatrix direction of the rotating member, a magnetic member and a spirally shaped portion of the coil have lengths, with which the magnetic member and the spirally shaped portion extend beyond both end portions of the rotating member.

Abstract: A fixing apparatus configured to include a rotational member having a conductive layer, a coil having a helical shape, a resonance circuit including a resonance capacitor and configured to be formed together with the rotational member and the coil, a first converter driving the resonance circuit, a second converter used to control power to be supplied to the first converter, a frequency setting unit configured to set a driving frequency of the first converter according to at least one of a size of the recording material and a temperature at a sheet non-passing portion of the rotational member, and a power control unit controlling the second converter according to a temperature at a sheet passing portion of the rotational member to control the power to be supplied to the first converter from the second converter, wherein the conductive layer is caused to generate heat by electromagnetic induction.