A printing apparatus that has a plurality of functions including a printing function and is capable of executing printing with resolution of 300 dpi or more includes a plurality of operating units including a printing unit and a power supply unit. The power supply unit includes a substrate, an input terminal that receives an alternating voltage, a smoothing capacitor that smooths the alternating voltage, a thermistor that detects a temperature, and a comparator that compares a signal output from the thermistor with a standard signal and outputs a notification signal. The input terminal, the smoothing capacitor, the thermistor, and the comparator are mounted on the substrate. The supply of power from the power supply unit is stopped based on the state of the notification signal. A gap between the input terminal and the thermistor is longer than a gap between the input terminal and the smoothing capacitor.

A communication apparatus comprises: a communication unit configured to communicate data with an external apparatus; a detection unit configured to detect a temperature of the communication apparatus; and a control unit configured to cause the detection unit to detect a temperature of the communication apparatus, perform, in a case where the detected temperature is lower than a predetermined temperature, a first communication operation performed without suspending the data transfer, and perform, in a case where the detected temperature is higher than or equal to the predetermined temperature, a second communication operation performed while suspending the data transfer, wherein the control unit sets, based on a communication state of the communication unit, a suspension time of the data transfer when performing the second communication operation.

An image reading device includes a first image reading portion, a cooling portion, a second image reading portion, and a notification processing portion. The first image reading portion reads an image of a document sheet at a first reading position. The cooling portion cools the document sheet at a cooling position downstream in a feeding direction of the document sheet with respect to the first reading position. The second image reading portion reads an image of the document sheet at a second reading position downstream in the feeding direction with respect to the cooling position. In a case where a difference image different from a first image read by the first image reading portion, the difference image being included in a second image read by the second image reading portion has been detected, the notification processing portion provides a notification that the difference image has been detected.

A natural frequency measuring device includes a receiving unit and a measuring unit. The receiving unit receives information of an image formed on a recording medium with vibrations of different frequencies provided to a member used to form the image. The measuring unit measures a natural frequency of the member from a frequency response characteristic using a misregistration amount of the image represented by the information of the image received by the receiving unit.

A print head includes: a mounting board; a light source portion that includes a plurality of light emitting elements provided on one surface of the mounting board; a drive member that is provided on other surface of the mounting board so as to generate a lighting signal and drive the light source portion; and a first temperature detector that is provided on the mounting board, and at least one second temperature detector that is provided at a farther position on the mounting board from the drive member than the first temperature detector; and the drive member includes: a light emitting unit that generates the lighting signal based on a temperature detected by the first temperature detector and a temperature detected by the second temperature detector; and an optical unit that forms an image of light emitted from the light emitting unit.

When scanning a document, an image scanning device conveys the document toward an image scanning position in a power supply stop state in which power supply to an electronic component is stopped, sets a power supply state in which power is supplied to the electronic component before scanning the document at the image scanning position, scans the document at the image scanning position in the power supply state, and sets the power supply stop state after scanning the document at the image scanning position.

An image capturing apparatus includes a plurality of pixels arranged on a substrate, a temperature signal output unit arranged on the substrate and configured to output a temperature signal representing a temperature, and a reference signal output unit arranged on the substrate and configured to output a reference signal used to correct the temperature signal. The temperature signal output unit and the reference signal output unit are arranged in regions different from each other on the substrate.

In an example embodiment, an image processing system can be implemented, which includes a printing surface and a prism that splits light from an input light source into two parallel light beams indicative of a signal image. Two or more DMDs (Digital Micromirror Devices) can be utilized, wherein the two parallel light beams are directed to the DMDs for image processing, such that as the two parallel light beams are reflected out onto the printing surface, the two parallel light beams are recombined into a single image, thereby enabling heat dissipation while stitching said output of said at least two digital micromirror devices to a usable video path.

An image forming apparatus includes: a wireless communication board on which a communication circuit is mounted, the communication circuit communicating image data with an external device in a wireless manner; an image forming unit that forms an image based on the image data; a control board connected to the wireless communication board via a connection line to control an image forming operation of the image forming unit; and an accommodation portion of a metal material in which the control board is accommodated, wherein a predetermined metal plate constituting the accommodation portion has a recessed portion, and the wireless communication board is positioned in the recessed portion.

A communication apparatus comprises: a communication unit configured to communicate data with an external apparatus; a detection unit configured to detect a temperature of the communication apparatus; and a control unit configured to cause the detection unit to detect a temperature of the communication apparatus, perform, in a case where the detected temperature is lower than a predetermined temperature, a first communication operation performed without suspending the data transfer, and perform, in a case where the detected temperature is higher than or equal to the predetermined temperature, a second communication operation performed while suspending the data transfer, wherein the control unit sets, based on a communication state of the communication unit, a suspension time of the data transfer when performing the second communication operation.