An image display apparatus includes a display section that displays an image provided on an apparatus main body, a detection section that detects a location of a user with respect to the apparatus main body, and a change section that changes an image to be displayed on the display section from an image for a first location to an image for a second location, the image for the first location and the image for the second location being images having an identical attribute, in a case where the location of the user, which is detected by the detection section, is changed from the first location to the second location.

In an image forming operation of transferring one developer image to a recording material, when a plurality of image forming portions include a non-image forming portion that is an image forming portion which does not form a developer image on an image bearing member, applying means for applying a charging bias to a charging member which comes into contact with and charges the image bearing member applies a second charging bias to the charging member in the non-image forming portion, the second charging bias having a same polarity as a first charging bias for forming a developer image and being a voltage equal to or lower than a discharge start voltage.

An image forming apparatus includes an image forming unit, an input unit and a control unit. The image forming unit forms an image by using a plurality of consumables. The input unit receives an input of information designating the consumables to be used for forming the image. The control unit selectably displays other candidates of the consumables to be used for forming the image, based on the designated consumables.

An image forming apparatus includes an image forming unit, an input unit and a control unit. The image forming unit forms an image by using a plurality of consumables. The input unit receives an input of information designating the consumables to be used for forming the image. The control unit selectably displays other candidates of the consumables to be used for forming the image, based on the designated consumables.

An image forming apparatus includes an image forming unit, an input unit and a control unit. The image forming unit forms an image by using a plurality of consumables . The input unit receives an input of information designating the consumables to be used for forming the image. The control unit selectably displays other candidates of the consumables to be used for forming the image, based on the designated consumables.

The power supply apparatus includes a switching element connected to a primary winding of a transformer to which an input voltage is applied; a feedback unit configured to output a first feedback voltage according to an output voltage, the output voltage induced in a secondary winding of the transformer and output to a load; a current detection unit for detecting a current flowing to the switching element and output a second feedback voltage according to the current detected; a limiting unit for limiting the first feedback voltage so that the current flowing to the switching element is below a predetermined current value; an output unit for outputting a driving signal for the switching element based on the first feedback voltage limited by the limiting unit and on the second feedback voltage; and a control unit for controlling the switching element according to the driving signal output from the output unit.

An image forming apparatus capable of forming images in mono-color and a plurality of colors includes first and second image forming units and a control unit. The image forming unit includes a rotatable image bearing member, a rotatable developing member that contacts the image bearing member to supply a developer to the surface thereof, and a developer supply member that supplies the developer to the developing member. The control unit switches between an image forming operation of forming an image on the image bearing member surface and a cleaning operation of removing an attached matter on the image bearing member surface with the developing member by controlling a voltage applied to the developing member and a voltage applied to the developer supply member.

An image forming system includes: an image forming apparatus that forms an image on a sheet; and a post-processor including a punch unit that forms a punch hole on the sheet conveyed from the image forming apparatus, wherein the image forming apparatus includes a conveyance control part that controls conveyance of the sheet to be conveyed to the post-processor, and the punch unit includes: a perforating part that forms the punch hole on the sheet; a detection part that performs sheet side end portion detection for detecting a side end portion in a main scanning direction, and paper dust detection for detecting a paper dust amount in a detection region; a swinging part that moves the perforating part to an arbitrary position; and a hardware processor that, when a punch job is performed, controls the detection part to perform the paper dust detection.

In an image forming operation of transferring one developer image to a recording material, when a plurality of image forming portions include a non-image forming portion that is an image forming portion which does not form a developer image on an image bearing member, applying means for applying a charging bias to a charging member which comes into contact with and charges the image bearing member applies a second charging bias to the charging member in the non-image forming portion, the second charging bias having a same polarity as a first charging bias for forming a developer image and being a voltage equal to or lower than a discharge start voltage.

An image forming apparatus includes an image carrier, a cleaning unit, a development device, and a control unit. The development device includes a toner collection mechanism having a developer carrier and a filter. The control unit is capable of executing a scattered toner recovery mode at non-image forming time, in which the filter is vibrated, a potential difference is generated in the direction for the toner to move from the developer carrier to the image carrier, the developer carrier is rotated in a reverse direction to that at image forming time, and the image carrier is rotated in the same direction as that at the image forming time, so that scattered toner, which has dropped from the filter and adhered to the developer carrier, is recovered by the cleaning unit via the image carrier.