Abstract: An image processing apparatus has a normal mode and a power saving mode as a power consumption mode. In the normal mode in which an image processor requires electric power supply, a direct voltage output by an AC-DC converter is supplied to the image processor. A voltage according to a power feed request from an external device connected to an USB connector is output by a variable output DC-DC converter via a power-feed terminal. In the power saving mode in which the electric power supply for the image processor in unnecessary, the voltage according to the power feed request from the external device connected to the USB connector is output by the AC-DC converter without routing through the variable output DC-DC converter.

Abstract: A switched-mode power supply includes a transformer, a switching element, a switching controller, a voltage generator circuit, an overvoltage protection circuit, and a load increase circuit. The overvoltage protection circuit is configured to, when a first DC voltage outputted from the voltage generator circuit is below a predetermined voltage, apply a first drive voltage to an input terminal of the switching controller, and to, when the first DC voltage exceeds the predetermined voltage, apply a second drive voltage, which is different from the first drive voltage, to the input terminal, whereby the switching controller stops controlling switching operation. The load increase circuit is configured to, when the output voltage exceeds a threshold voltage, flow a current from the secondary side, thereby increasing a load applied to the secondary side. The threshold voltage is less than a rated voltage of the transformer and greater than the target voltage.

Abstract: An image processing apparatus has a normal mode and a power saving mode as a power consumption mode. In the normal mode in which an image processor requires electric power supply, a direct voltage output by an AC-DC converter is supplied to the image processor. A voltage according to a power feed request from an external device connected to an USB connector is output by a variable output DC-DC converter via a power-feed terminal. In the power saving mode in which the electric power supply for the image processor in unnecessary, the voltage according to the power feed request from the external device connected to the USB connector is output by the AC-DC converter without routing through the variable output DC-DC converter.

Abstract: A switched-mode power supply includes a transformer, a switching element, a switching controller, a voltage generator circuit, an overvoltage protection circuit, and a load increase circuit. The overvoltage protection circuit is configured to, when a first DC voltage outputted from the voltage generator circuit is below a predetermined voltage, apply a first drive voltage to an input terminal of the switching controller, and to, when the first DC voltage exceeds the predetermined voltage, apply a second drive voltage, which is different from the first drive voltage, to the input terminal, whereby the switching controller stops controlling switching operation. The load increase circuit is configured to, when the output voltage exceeds a threshold voltage, flow a current from the secondary side, thereby increasing a load applied to the secondary side. The threshold voltage is less than a rated voltage of the transformer and greater than the target voltage.

Abstract: A power supply system includes: a switching power supply configured to output a direct current; a control circuit configured to output a switching signal; an abnormality detection circuit configured to output an abnormality signal; an operation control unit connected to the control circuit and the abnormality detection circuit and configured to output an operation control signal, and a power supply control circuit configured to, when a first operation control signal is input, switch a state of the switching power supply to an operation state or a stop state. The operation control unit outputs the first operation control signal to the power supply control circuit when the switching signal is input. The operation control unit outputs a second operation control signal to the power supply control circuit when the abnormality signal is input.

Abstract: A switching power supply includes: a main power supply; a rectifying-and-smoothing circuit configured to rectify and smooth an AC voltage; a transformer connected to the rectifying-and-smoothing circuit; a first switching element connected to a primary coil of the transformer; a switch controller configured to perform switching-control the first switching element to oscillate the primary side of the transformer, thereby inducing a voltage to a secondary side of the transformer; and a second switching element connected in series with the smoothing capacitor of the rectifying-and-smoothing circuit and configured to switch between on-and-off states of energization by a control signal that is to be output from the switch controller, wherein the switch controller is configured to limit an on-time period of the second switching element by the control signal during an output stop mode in which the oscillation of the transformer is to be stopped.

Abstract: A switching power supply includes: a main power supply; a rectifying-and-smoothing circuit configured to rectify and smooth an AC voltage; a transformer connected to the rectifying-and-smoothing circuit; a first switching element connected to a primary coil of the transformer; a switch controller configured to perform switching-control the first switching element to oscillate the primary side of the transformer, thereby inducing a voltage to a secondary side of the transformer; and a second switching element connected in series with the smoothing capacitor of the rectifying-and-smoothing circuit and configured to switch between on-and-off states of energization by a control signal that is to be output from the switch controller, wherein the switch controller is configured to limit an on-time period of the second switching element by the control signal during an output stop mode in which the oscillation of the transformer is to be stopped.

Abstract: A power supply system includes: a switching power supply configured to output a direct current; a control circuit configured to output a switching signal; an abnormality detection circuit configured to output an abnormality signal; an operation control unit connected to the control circuit and the abnormality detection circuit and configured to output an operation control signal, and a power supply control circuit configured to, when a first operation control signal is input, switch a state of the switching power supply to an operation state or a stop state. The operation control unit outputs the first operation control signal to the power supply control circuit when the switching signal is input. The operation control unit outputs a second operation control signal to the power supply control circuit when the abnormality signal is input.

Abstract: An image forming apparatus may includes a central processing device, a first switching regulator and a second switching regulator. The central processing device may perform information processing associated with image formation. The first switching regulator may receive an input of a first voltage and output a second voltage which is lower than the first voltage. The second switching regulator may receive an input of the second voltage and output a third voltage which is lower than the second voltage. The third voltage may be input to the central processing device. A first switching frequency which is a switching frequency of the first switching regulator may be lower than a second switching frequency which is a switching frequency of the second switching regulator.

Abstract: An image forming apparatus may be configured to enter a first state where electric power is supplied from a power supply and a second state where no electric power is supplied from the power supply. A capacitor may be connected to the power supply, and may be charged by the power supply in the first state. A controller may be connected to the capacitor, and may operate with electric power supplied from the capacitor in the second state. The controller may operate with electric power supplied from the power supply in the first state. The controller may cause the image forming apparatus to enter the first state upon detecting that the image forming apparatus is in a predetermined state. The controller may acquire the related information and may cause the image forming apparatus to enter the second state.

Abstract: A power supply device having a first load operating with a first voltage in a normal operation mode, a second load operating with a second voltage lower than the first voltage in the normal operation mode, and a third load operating with the second voltage in the normal operation mode and a power-saving mode. An auxiliary second-voltage generating circuit configured to, when a main supply voltage is supplied from a main power supply circuit and a primary second-voltage generating circuit does not generate the second voltage with a third-load electric path for carrying therethrough the main supply voltage from the main power supply circuit to the third load without passing through the primary second-voltage generating circuit being broken by a switching circuit, generate the second voltage from the main supply.

Abstract: An image processing apparatus includes: a display and a display controller that controls the display to display thereon a page. When a first processing is currently performed on the page, the page includes: a first part, on which the first processing has not yet been performed; and a second part, on which the first processing has already been performed. When a second processing is currently performed on the page, the page includes: a third part, on which the second processing has not yet been performed; and a fourth part, on which the second processing has already been performed. The display controller controls the display to display the first part and the second part in different display modes. The display controller controls the display to display the third part and the fourth part in different display modes.

Abstract: An image forming apparatus is provided, which includes a control unit, one or more motors, and a plurality of power supply management devices each of which includes one or more driving circuits for driving the motors, one or more power supply circuits for supplying electricity to the control unit and an external device, a signal output unit issuing a halting signal to the other power supply management devices in response to detection of an abnormality in the power supply management device, a halting unit halting an operation of the power supply management device in response to receipt of a halting signal from one of the other power supply management devices and detection of the abnormality in the power supply management device, and a restoring unit restoring the halted operation of the power supply management device in response to a predetermined restoring condition being satisfied.

Abstract: An image forming apparatus may includes a central processing device, a first switching regulator and a second switching regulator. The central processing device may perform information processing associated with image formation. The first switching regulator may receive an input of a first voltage and output a second voltage which is lower than the first voltage. The second switching regulator may receive an input of the second voltage and output a third voltage which is lower than the second voltage. The third voltage may be input to the central processing device. A first switching frequency which is a switching frequency of the first switching regulator may be lower than a second switching firequency which is a switching frequency of the second switching regulator.

Abstract: An image forming apparatus may be configured to enter a first state where electric power is supplied from a power supply and a second state where no electric power is supplied from the power supply. A capacitor may be connected to the power supply, and may be charged by the power supply in the first state. A controller may be connected to the capacitor, and may operate with electric power supplied from the capacitor in the second state. The controller may operate with electric power supplied from the power supply in the first state. The controller may cause the image forming apparatus to enter the first state upon detecting that the image forming apparatus is in a predetermined state. The controller may acquire the related information and may cause the image forming apparatus to enter the second state.

Abstract: An image processing apparatus includes: a display and a display controller that controls the display to display thereon a page. When a first processing is currently performed on the page, the page includes: a first part, on which the first processing has not yet been performed; and a second part, on which the first processing has already been performed. When a second processing is currently performed on the page, the page includes: a third part, on which the second processing has not yet been performed; and a fourth part, on which the second processing has already been performed. The display controller controls the display to display the first part and the second part in different display modes. The display controller controls the display to display the third part and the fourth part in different display modes.

Abstract: An image processing apparatus includes: a display and a display controller that controls the display to display thereon a page. When a first processing is currently performed on the page, the page includes: a first part, on which the first processing has not yet been performed; and a second part, on which the first processing has already been performed. When a second processing is currently performed on the page, the page includes: a third part, on which the second processing has not yet been performed; and a fourth part, on which the second processing has already been performed. The display controller controls the display to display the first part and the second part in different display modes. The display controller controls the display to display the third part and the fourth part in different display modes.

Abstract: There is provided a main device of a cordless telephone system that performs communication with at least one additional device, each of which includes a search unit that intermittently searches for a radio wave generated from the main device, and a search stopping unit that stops execution of the search unit after a state in which the search unit does not receive a radio wave continues for a predetermined time. The main device includes a radio wave generating unit, an operation stopping unit that stops an operation of the radio wave generating unit, and a temporary returning unit that temporality recovers the operation of the radio wave generating unit and stops the operation of the radio wave generating unit after the additional device executes multiple searches by using the search unit after stopping the operation of the radio wave generating unit, but before the predetermined time elapses.

Abstract: An image data identifying unit identifies at least two pieces of image data for images displayed in display regions detected by a detecting unit. The at least two pieces of image data includes a first image data firstly identified by the image data identifying unit. An image data selecting unit selects or deselects the at least two pieces of image data identified by the image data identifying unit. A selection data storing unit stores selection data for each of the plurality of pieces of image data read by a reading unit. The selection data indicates whether each of the plurality of pieces of image data is in a selected state or a deselected state by the image data selecting unit. A determining unit determines whether the first image data is in the selected state or the deselected state based on the selection data.

Abstract: An image forming apparatus is provided, which includes a control unit, one or more motors, and a plurality of power supply management devices each of which includes one or more driving circuits for driving the motors, one or more power supply circuits for supplying electricity to the control unit and an external device, a signal output unit issuing a halting signal to the other power supply management devices in response to detection of an abnormality in the power supply management device, a halting unit halting an operation of the power supply management device in response to receipt of a halting signal from one of the other power supply management devices and detection of the abnormality in the power supply management device, and a restoring unit restoring the halted operation of the power supply management device in response to a predetermined restoring condition being satisfied.