Abstract: An electronic apparatus includes a processor that performs: obtaining first information related to ambient electromagnetic radiation of the electronic apparatus in an environment having at least one other electronic apparatus; and controlling operation of either one or both of the electronic apparatus and the at least one other electronic apparatus with reference to the result of the comparison of a level of ambient electromagnetic radiation of the electronic apparatus to an allowable limit of electromagnetic radiation exposure of the electronic apparatus, the level of ambient electromagnetic radiation being included in the first information obtained by the processor.

Abstract: An electronic apparatus includes a processor that performs: obtaining first information related to ambient electromagnetic radiation of the electronic apparatus in an environment having at least one other electronic apparatus; and controlling operation of either one or both of the electronic apparatus and the at least one other electronic apparatus with reference to the result of the comparison of a level of ambient electromagnetic radiation of the electronic apparatus to an allowable limit of electromagnetic radiation exposure of the electronic apparatus, the level of ambient electromagnetic radiation being included in the first information obtained by the processor.

Abstract: A power control apparatus that supplies an AC current to a load and adjusts a current amount by setting a portion of a phase range among each of half-wave periods of the AC current to be supplied as a conduction angle and setting the remainder as a non-conduction angle, includes: a reference value determiner that defines a period across a plurality of half-wave periods as a current determination period and that determines a reference value of the conduction angle; and a distribution processor that determines a distribution value to distribute the conduction angle and performs current amount adjustment by distributed conduction angles, wherein the distribution processor determines the distribution value within one current determination period such that the value includes a positive distribution value and a negative distribution value, and an average value of the distributed conduction angles is within ±2.5% with respect to the reference value.

Abstract: A power control apparatus that supplies an AC current to a load and adjusts a current amount by setting a portion of a phase range among each of half-wave periods of the AC current to be supplied as a conduction angle and setting the remainder as a non-conduction angle, includes: a reference value determiner that defines a period across a plurality of half-wave periods as a current determination period and that determines a reference value of the conduction angle; and a distribution processor that determines a distribution value to distribute the conduction angle and performs current amount adjustment by distributed conduction angles, wherein the distribution processor determines the distribution value within one current determination period such that the value includes a positive distribution value and a negative distribution value, and an average value of the distributed conduction angles is within ±2.5% with respect to the reference value.

Abstract: An image reading apparatus includes: three or more light sources configured to each emit light; a light receiving unit including a common light receiving surface configured to detect each light emitted; and an image generation unit configured to cause the three or more light sources to be switched over in a predetermined order and emit the corresponding light, and generate an image read from a document, wherein at least one of the three or more light sources includes a white light source and an optical filter, and the optical filter is configured such that a half-value width of a wavelength with respect to a maximum intensity of a spectral characteristic of the emitted light after transmission is wider than a half-value width of a wavelength with respect to a maximum intensity of the spectral characteristic of the light emitted from at least one of the other light sources.

Abstract: An image reading apparatus includes: three or more light sources configured to each emit light; a light receiving unit including a common light receiving surface configured to detect each light emitted; and an image generation unit configured to cause the three or more light sources to be switched over in a predetermined order and emit the corresponding light, and generate an image read from a document, wherein at least one of the three or more light sources includes a white light source and an optical filter, and the optical filter is configured such that a half-value width of a wavelength with respect to a maximum intensity of a spectral characteristic of the emitted light after transmission is wider than a half-value width of a wavelength with respect to a maximum intensity of the spectral characteristic of the light emitted from at least one of the other light sources.

Abstract: A multi-feed detection apparatus for detecting multi-feed of a sheet conveyed along a paper path is provided. The apparatus includes a first movement amount sensor disposed on the paper path to face a first surface of the sheet to detect a movement amount of the sheet; a second movement amount sensor disposed, on the paper path, in a position at which the first movement amount sensor is disposed to face a second surface of the sheet to detect a movement amount of the sheet; and a determination portion configured to determine that a conveyance state of the sheet is multi-feed when a difference between the movement amount of the sheet detected by the first movement amount sensor and the movement amount of the sheet detected by the second movement amount sensor is equal to or greater than a threshold.

Abstract: An image forming apparatus forms a toner image of text on a recording sheet based on PDL data prescribing text data and one or more print conditions of thereof, and thermally fixes the toner image, and includes: condition acquisition unit analyzing the PDL data to acquire, as the conditions, one or more of character number, character spacing, and line spacing from the PDL data; judgment unit judging for each condition, by comparing the condition with reference value, the judgment indicating whether the condition is suitable for ensuring fixability of the toner image if thermally fixed at a temperature that is lower than predetermined temperature; and temperature control unit, when the judgment unit judges negatively for at least one condition, setting a fixing temperature for thermally fixing the toner image to the predetermined temperature, when the judgment unit judges affirmatively for all conditions, setting the fixing temperature to the lower temperature.

Abstract: A fixing device includes: a plurality of heating units which individually heat a plurality of areas of a fixing member; an acquisition unit which acquires information on an image forming range and a non-image forming range of the recording sheet for each of the plurality of divided heating areas; and a control unit which performs first control for controlling the corresponding heating unit such that a contact portion of the image forming range of the recording sheet has a target fixing temperature when the image forming range contacts the fixing member at the contact portion of the image forming range, and second control for controlling the corresponding heating unit such that a contact portion of the non-image forming range of the recording sheet has a temperature lower than the fixing temperature when the non-image forming range contacts the fixing member at the contact portion of the non-image forming range.

Abstract: A multi-feed detection apparatus for detecting multi-feed of a sheet conveyed along a paper path is provided. The apparatus includes a first movement amount sensor disposed on the paper path to face a first surface of the sheet to detect a movement amount of the sheet; a second movement amount sensor disposed, on the paper path, in a position at which the first movement amount sensor is disposed to face a second surface of the sheet to detect a movement amount of the sheet; and a determination portion configured to determine that a conveyance state of the sheet is multi-feed when a difference between the movement amount of the sheet detected by the first movement amount sensor and the movement amount of the sheet detected by the second movement amount sensor is equal to or greater than a threshold.

Abstract: A fixing device thermally fixes an unfixed image onto a sheet through heat of a heating body that is heated through electromagnetic induction, the fixing device including an excitation coil generating flux for heating the heating body; one or more core members disposed opposite the heating body with respect to the excitation coil; a thermo-electric conversion element disposed farther from the excitation coil than the core members; and a thermally conductive member connected to the excitation coil and to a heat-absorbing face of the thermo-electric conversion element, transferring heat from the excitation coil to the thermo-electric conversion element.

Abstract: A fixing device includes: a plurality of heating units which individually heat a plurality of areas of a fixing member; an acquisition unit which acquires information on an image forming range and a non-image forming range of the recording sheet for each of the plurality of divided heating areas; and a control unit which performs first control for controlling the corresponding heating unit such that a contact portion of the image forming range of the recording sheet has a target fixing temperature when the image forming range contacts the fixing member at the contact portion of the image forming range, and second control for controlling the corresponding heating unit such that a contact portion of the non-image forming range of the recording sheet has a temperature lower than the fixing temperature when the non-image forming range contacts the fixing member at the contact portion of the non-image forming range.

Abstract: A fixing device thermally fixes an unfixed image onto a sheet through heat of a heating body that is heated through electromagnetic induction, the fixing device including an excitation coil generating flux for heating the heating body; one or more core members disposed opposite the heating body with respect to the excitation coil; a thermo-electric conversion element disposed farther from the excitation coil than the core members; and a thermally conductive member connected to the excitation coil and to a heat-absorbing face of the thermo-electric conversion element, transferring heat from the excitation coil to the thermo-electric conversion element.

Abstract: An image forming apparatus forms a toner image of text on a recording sheet based on PDL data prescribing text data and one or more print conditions of thereof, and thermally fixes the toner image, and includes: condition acquisition unit analyzing the PDL data to acquire, as the conditions, one or more of character number, character spacing, and line spacing from the PDL data; judgment unit judging for each condition, by comparing the condition with reference value, the judgment indicating whether the condition is suitable for ensuring fixability of the toner image if thermally fixed at a temperature that is lower than predetermined temperature; and temperature control unit, when the judgment unit judges negatively for at least one condition, setting a fixing temperature for thermally fixing the toner image to the predetermined temperature, when the judgment unit judges affirmatively for all conditions, setting the fixing temperature to the lower temperature.