Abstract: An inkjet recording apparatus captures an image of a recording surface of a recording medium including a test pattern recorded on the recording surface, calculates an interval between the test pattern and a reference position on the recording surface based on the image of the recording surface, and determines a height position of the recording head according to the recording medium based on the interval. The inkjet recording apparatus outputs information related to the determined height position.

Abstract: An image forming apparatus includes an image forming section, a first detecting section, a second detecting section, a display section, and a control section. The first detecting section detects a person present within a predetermined range from the image forming apparatus. The second detecting section detects an eye gaze of the person detected by the first detecting section. When, during a power saving state of the image forming apparatus, the first detecting section detects a person and the second detecting section detects an eye gaze of the person directed in a predetermined direction, the control section wakes up the image forming apparatus from the power saving state and allows the display section to display a predetermined screen according to the direction of the person's eye gaze detected by the second detecting section.

Abstract: An image forming apparatus includes an image forming section, a sheet output tray, an operating section, an operation acceptance section, a human body detection sensor, a communication section, a command acceptance section, and a control section. When the command acceptance section accepts a print job command from an external device while a human body is being detected by the human body detection sensor provided at the front of the image forming apparatus, the control section suspends a print job based on the print job command.

Abstract: An image forming apparatus includes an image forming section, a first detecting section, a second detecting section, a display section, and a control section. The first detecting section detects a person present within a predetermined range from the image forming apparatus. The second detecting section detects an eye gaze of the person detected by the first detecting section. When, during a power saving state of the image forming apparatus, the first detecting section detects a person and the second detecting section detects an eye gaze of the person directed in a predetermined direction, the control section wakes up the image forming apparatus from the power saving state and allows the display section to display a predetermined screen according to the direction of the person's eye gaze detected by the second detecting section.

Abstract: An image forming apparatus includes an image forming section, a sheet output tray, an operating section, an operation acceptance section, a human body detection sensor, a communication section, a command acceptance section, and a control section. When the command acceptance section accepts a print job command from an external device while a human body is being detected by the human body detection sensor provided at the front of the image forming apparatus, the control section suspends a print job based on the print job command.

Abstract: An image forming apparatus includes a main memory device, an auxiliary storage device, a print request receiving unit, and a print processing unit. The print request receiving unit is configured to (a) receive from an external device a print request that includes the number of printing pages and print image data, (b) select one of the main memory device and the auxiliary storage device as a device to which the print image data is to be written on the basis of the number of printing pages, and (c) write the print image data in the selected main memory device or auxiliary storage device. The print processing unit is configured to read the print image data from the main memory device or the auxiliary storage device and perform a print process based on the print image data.

Abstract: The image forming apparatus executes a process of generating image data of an alternative image involving a smaller consumption quantity of color material than an image contained in a replacement-object area and then generating replaced image data in which the image data of the replacement-object area has been replaced with the image data of the alternative image, and the control section instructs a printing section to execute color material-saving printing of printing an image based on the replaced image data on a sheet. The alternative image is an image containing information for allowing an image based on the image data of the replacement-object area to be displayed by an information terminal that has read the alternative image.

Abstract: An electronic device has a normal mode, a weak power-saving mode, a strong power-saving mode, and a power-saving temporary mode. The power-saving temporary mode is temporarily switched every time a specific timing arrives while a specific condition is unsatisfied in the strong power-saving mode. The power-saving temporary mode reduces power consumption of at least a part of the hardware element in the power-saving temporary mode compared with the power consumption in the weak power-saving mode. The strong power-saving mode reduces power consumption of at least a part of the hardware element in the strong power-saving mode compared with the power consumption in the power-saving temporary mode. The power mode switching unit switches to the weak power-saving mode when the specific condition becomes satisfied in the strong power-saving mode.

Abstract: The image forming apparatus executes a process of generating image data of an alternative image involving a smaller consumption quantity of color material than an image contained in a replacement-object area and then generating replaced image data in which the image data of the replacement-object area has been replaced with the image data of the alternative image, and the control section instructs a printing section to execute color material-saving printing of printing an image based on the replaced image data on a sheet. The alternative image is an image containing information for allowing an image based on the image data of the replacement-object area to be displayed by an information terminal that has read the alternative image.

Abstract: An image forming apparatus includes a main memory device, an auxiliary storage device, a print request receiving unit, and a print processing unit. The print request receiving unit is configured to (a) receive from an external device a print request that includes the number of printing pages and print image data, (b) select one of the main memory device and the auxiliary storage device as a device to which the print image data is to be written on the basis of the number of printing pages, and (c) write the print image data in the selected main memory device or auxiliary storage device. The print processing unit is configured to read the print image data from the main memory device or the auxiliary storage device and perform a print process based on the print image data.

Abstract: Provided is an electronic apparatus including: a processor including a plurality of cores that divisionally execute a plurality of tasks; a total task amount calculation circuit that calculates, for each of the cores, a total task amount as a total processing amount of the plurality of tasks to be executed; a sleep shift processing circuit that causes one of the plurality of cores to shift to a sleep mode based on the total task amount calculated for each of the cores; and a sleep recovery processing circuit that causes, when the one of the cores is in the sleep mode, the core in the sleep mode to recover from the sleep mode based on the total task amount.

Abstract: An electronic device includes a plurality of processes, an interrupt waiting unit for each of the processes, and an interrupt handler. The interrupt handler processes the interrupt. The interrupt waiting unit sets an interrupt waiting flag to wait for an occurrence of the interrupt. The interrupt handler, when the interrupt occurred, sets an interrupt style of the occurred interrupt and releases the interrupt waiting flag from the set state. The interrupt waiting unit, when the interrupt waiting flag was released from the set state, sets the interrupt waiting flag if the interrupt style set by the interrupt handler is not an interrupt style matched with the process, and operates the process if the interrupt style set by the interrupt hander is the interrupt style matched with the one of the processes. The interrupt waiting flag is located to each of the processes.

Abstract: An electronic device has a normal mode, a weak power-saving mode, a strong power-saving mode, and a power-saving temporary mode. The power-saving temporary mode is temporarily switched every time a specific timing arrives while a specific condition is unsatisfied in the strong power-saving mode. The power-saving temporary mode reduces power consumption of at least a part of the hardware element in the power-saving temporary mode compared with the power consumption in the weak power-saving mode. The strong power-saving mode reduces power consumption of at least a part of the hardware element in the strong power-saving mode compared with the power consumption in the power-saving temporary mode. The power mode switching unit switches to the weak power-saving mode when the specific condition becomes satisfied in the strong power-saving mode.

Abstract: An electronic device includes a plurality of processes, an interrupt waiting unit for each of the processes, and an interrupt handler. The interrupt handler processes the interrupt. The interrupt waiting unit sets an interrupt waiting flag to wait for an occurrence of the interrupt. The interrupt handler, when the interrupt occurred, sets an interrupt style of the occurred interrupt and releases the interrupt waiting flag from the set state. The interrupt waiting unit, when the interrupt waiting flag was released from the set state, sets the interrupt waiting flag if the interrupt style set by the interrupt handler is not an interrupt style matched with the process, and operates the process if the interrupt style set by the interrupt hander is the interrupt style matched with the one of the processes. The interrupt waiting flag is located to each of the processes.

Abstract: Provided is an electronic apparatus including: a processor including a plurality of cores that divisionally execute a plurality of tasks; a total task amount calculation circuit that calculates, for each of the cores, a total task amount as a total processing amount of the plurality of tasks to be executed; a sleep shift processing circuit that causes one of the plurality of cores to shift to a sleep mode based on the total task amount calculated for each of the cores; and a sleep recovery processing circuit that causes, when the one of the cores is in the sleep mode, the core in the sleep mode to recover from the sleep mode based on the total task amount.

Abstract: The electronic device may include a RAM, a nonvolatile storage device as an MTD, and firmware that may be stored on the nonvolatile storage device. The firmware may include a kernel that is expanded onto the RAM and a root disk image as a root file system. The kernel mounts the root disk image on the nonvolatile storage device as the root file system when a boot mode of the electronic device is a normal boot mode. The kernel, when the boot mode is an update mode for updating the firmware on the nonvolatile storage device, may i) generate a RAM disk as an MTD in an area of the RAM not under management of the kernel, ii) expand the root disk image on the nonvolatile storage device into the RAM disk, and iii) mount the root disk image on the RAM disk as the root file system.

Abstract: To provide a technique that makes it possible, for a user without conscious of the detailed firmware program contents and the current state of a device, to execute an update process in a case of using file in which plural firmware programs are packaged. Upon connection of an external auxiliary storage device that stores the package file, a detection of a firmware program to be updated turns a staring mode into an update mode for updating a firmware program. If a failure in an internal auxiliary storage device is detected after re-starting, a starting is made by the update mode using a firmware program in the package file. In a case where a firmware program that is to be installed into the flash memory is updatable, only the firmware program that is to be installed into the flash memory is installed and updated.

Abstract: To provide a technique that makes it possible, for a user without conscious of the detailed firmware program contents and the current state of a device, to execute an update process in a case of using file in which plural firmware programs are packaged. Upon connection of an external auxiliary storage device that stores the package file, a detection of a firmware program to be updated turns a staring mode into an update mode for updating a firmware program. If a failure in an internal auxiliary storage device is detected after re-starting, a starting is made by the update mode using a firmware program in the package file. In a case where a firmware program that is to be installed into the flash memory is updatable, only the firmware program that is to be installed into the flash memory is installed and updated.

Abstract: The electronic device may include a RAM, a nonvolatile storage device as an MTD, and firmware that may be stored on the nonvolatile storage device. The firmware may include a kernel that is expanded onto the RAM and a root disk image as a root file system. The kernel mounts the root disk image on the nonvolatile storage device as the root file system when a boot mode of the electronic device is a normal boot mode. The kernel, when the boot mode is an update mode for updating the firmware on the nonvolatile storage device, may i) generate a RAM disk as an MTD in an area of the RAM not under management of the kernel, ii) expand the root disk image on the nonvolatile storage device into the RAM disk, and iii) mount the root disk image on the RAM disk as the root file system.