Abstract: An image forming apparatus includes a controller, a drive unit, a developer bearing member, a regulation blade, and a sheet member. During non-image forming, the controller executes a control mode for controlling the drive unit to rotatably drive the developer bearing member in a second direction opposite to a first direction, and then rotatably drive the developer bearing member in the first direction. A portion above a horizontal line passing through a tip of the regulation blade out of the sheet member is disposed in a moving path of a developer born by the developer bearing member when the drive unit rotatably drives the developer bearing member in the second direction in the control mode, and is not disposed in the moving path of the developer born by the developer bearing member when the drive unit rotatably drives the developer bearing member in the first direction during image forming.

Abstract: A developing apparatus includes a replenishment conveyance screw portion to convey replenishment developer from a developer replenishment portion toward a first communication portion. First, second and third blade portions are formed in a spiral shape on an outer circumferential surface of a rotation shaft of the replenishment conveyance screw portion. A pitch of the first blade portion, a pitch of the second blade portion, and a pitch of the third blade portion are each larger than a pitch of a blade of a second conveyance screw portion, and the third blade portion is continuously formed in a region between a terminal end of the first blade portion and a starting end of the second blade portion.

Abstract: A replenishment conveyance screw portion is provided in a replenishment conveyance path and configured to convey the replenishment developer in a third direction. The replenishment conveyance screw portion includes a first blade portion, a second blade portion, and, a third blade portion. The third blade portion is continuously formed in a region between a terminal end of the first blade portion with respect to the third direction and a starting end of the second blade portion with respect to the third direction, the region being displaced in a circumferential direction of the replenishment conveyance screw portion from the terminal end of the first blade portion and the starting end of the second blade portion.

Abstract: An image forming apparatus includes a controller, a drive unit, a developer bearing member, a regulation blade, and a sheet member. During non-image forming, the controller executes a control mode for controlling the drive unit to rotatably drive the developer bearing member in a second direction opposite to a first direction, and then rotatably drive the developer bearing member in the first direction. A portion above a horizontal line passing through a tip of the regulation blade out of the sheet member is disposed in a moving path of a developer born by the developer bearing member when the drive unit rotatably drives the developer bearing member in the second direction in the control mode, and is not disposed in the moving path of the developer born by the developer bearing member when the drive unit rotatably drives the developer bearing member in the first direction during image forming.

Abstract: A developing device includes a rotatable developer carrying member, a developer regulating member, and a cylindrical magnetic field generating member provided inside the developer carrying member and including a regulating magnetic pole provided opposed to the developer regulating member. A magnetic flux distribution provided by the regulating magnetic pole includes a first local maximum portion on a side upstream of a closest position between the magnetic field generating member and the developer regulating member, a second local maximum portion on a side downstream of the closest position, and a local minimum portion between the first local maximum portion and the second local maximum portion. A rectilinear line connecting the closest position and a center of the magnetic field generating member is positioned between the first local maximum portion and the second local maximum portion.

Abstract: A developing device includes a cylindrical developing sleeve, a regulating member 25, which is opposed to the developing sleeve, which has a magnetic property and which is curved in a direction of projecting toward the developing sleeve, for regulating an amount of a developer carried on the developing sleeve with respect to a rotational direction D2 of the developing sleeve and includes a magnet roller 24m, and a magnetic flux density distribution 60 of a regulating magnetic pole includes a first local maximum portion 61 positioned on a side upstream, with respect to the rotational direction D2, of a closest position P1 on the magnet roller 24m to the regulating member 25, a second local maximum portion 62 positioned on a side downstream of the closest position G1 with respect to the rotational direction D2, and a local minimum portion 63 positioned between the first local maximum portion 61 and the second local maximum portion 62.

Abstract: An image forming apparatus includes a controller to control a driving unit that rotates a developing rotary member. Rotation speed of the developing rotary member is controlled to become a first rotation speed in an image forming period. Rotation speed of the developing rotary member is decelerated from the first rotation speed in a first period of a non-image forming period so that the rotation speed becomes a second rotation speed lower than the first rotation speed, and rotation speed is decelerated from the second rotation speed in a second period subsequent to the first period of the non-image forming period so that the rotation of the developing rotary member is stopped. A deceleration amount per unit time of the developing rotary member in the first period is smaller than a deceleration amount per unit time of the developing rotary member in the second period.

Abstract: A developing apparatus includes a developer bearing member to bear developer containing toner and carrier to develop an electrostatic latent image formed on an image bearing member, a first chamber to supply developer to the developer bearing member, a second chamber to communicate with the first chamber to circulate developer, and a partition wall to separate the first and second chambers. An opening portion, through which an airflow from the second chamber toward the first chamber passes, is provided to the partition wall, and a length of the opening portion is equal to or longer than a length of a plurality of pitches of blades of a conveyance screw provided in the second chamber. A length, in the vertical direction, of the opening portion at a first position is longer than a length, in the vertical direction, of the opening portion at a second position.

Abstract: According to an aspect, a display device with a touch detection function includes: a display unit; a detecting unit; and a control unit that controls an operation timing of the display unit and the detecting unit. The control unit performs display processing and touch detection processing alternately a plurality of times in a display period of an image of one frame, the display processing being processing of performing control on the electric charge, the touch detection processing being processing of performing the touch detection. The control unit varies a length of a first period, a length of a second period, or both in display periods of images of two frames that are displayed consecutively, the first period being a period in which the display processing is performed once, the second period being a period in which the touch detection processing is performed once.

Abstract: A display device with a touch detection function includes a substrate, pixel electrodes arranged in a matrix in a display region on a plane parallel to the substrate, a display function layer having a function to display the image in the display region, drive electrodes provided facing the pixel electrodes, touch detection electrodes that form electrostatic capacitance between there and the drive electrodes, a control unit that generates a control signal to switch between a display operation period for applying a display signal between the pixel and drive electrodes and a display stop period for stopping the display operation. The control unit generates first and second control signals respectively having a first frequency and a second frequency that is different from the first frequency, and has first and second operation modes respectively including a period controlled by the first control signal and a period controlled by the second control signal.

Abstract: A developing apparatus includes a developer bearing member, a first and a second chamber, a first communicating portion and a second communicating portion, a wall portion disposed between the first and second communicating portions in a rotational axis direction of the developer bearing member, a first conveyance member provided in the first chamber, and configured to convey developer in a first direction from the first communicating portion toward the second communicating portion, a second conveyance member provided in the second chamber, and configured to convey developer in a second direction from the second communicating portion toward the first communicating portion, a replenishing portion, and an air vent portion provided on the wall portion at a position higher than a height of the first conveyance member and a height of the second conveyance member in a vertical direction, and configured to vent air between the first and second chambers.

Abstract: According to one embodiment, a pixel signal from a memory is supplied to an arbitrary pixel. A controller selectively switches a scanning frequency of common electrodes including a touch detection system, between a higher frequency and a lower frequency, and allocates banks in the memory, each bank having a capacity of a fixed number of items of the pixel data. The controller defines one unit including a group of lines of the pixel data, sets a line number of the one unit to the fixed number when the scanning frequency is the higher frequency, and sets the line number of the one unit to another line number which is greater than the fixed number when the scanning frequency is the lower frequency.

Abstract: A developing apparatus includes a developer bearing member, a first chamber to supply the developer to the developer bearing member, and a second chamber to collect the developer having passed through a developing region. A guiding portion is arranged on a partition portion that separates the first and second chambers. The guiding portion guides the developer from the developer bearing member to the second chamber, and is positioned overlapping a communicating portion between the first and second chambers. One end portion of the guiding portion is arranged above an upper end of the partition portion, and the other end portion of the guiding portion is arranged above a rotation axis of a conveyance screw in the second chamber and below an uppermost portion of the conveyance screw while leaving a clearance between the guiding portion and the conveyance screw.

Abstract: Provided is an image forming apparatus, including: a developer containing unit configured to contain developer; a developer bearing member, which is rotatably provided in the developer containing unit, and is configured to bear the developer; a driving unit configured to drive the developer bearing member; and a control unit configured to control the driving unit so that, when rotation of the developer bearing member is stopped after an image forming operation is terminated, drive transmission to the developer bearing member is turned off after a rotational speed of the developer bearing member is reduced to a set rotational speed lower than a rotational speed of the developer bearing member during the image formation while performing the drive transmission to the developer bearing member.

Abstract: An image forming apparatus includes an image bearing member, a developing apparatus, and a controller. The developing apparatus includes a developer container, a developer bearing member, a conveyance member, and a detection unit. The detection unit comprises a detection surface arranged to face to the conveyance member and is configured to detect a toner density concerning the developer in the developer container and output a signal. The controller configured to adjust a toner density concerning the developer in the developer container based on a peak value of a waveform of an output signal of the detection unit.

Abstract: A developing apparatus includes a developer container including a first chamber, a second chamber, and a partition portion separating the first and second chambers, and configured such that developer borne on the developer bearing member is recovered to the second chamber. A transfer portion, through which the developer conveyed by a conveyance member arranged in the second chamber is transferred to the first chamber, is formed in the partition portion. An extended portion extended in a direction from the developer bearing member toward the second chamber is provided to the position overlapped with the transfer portion in the conveyance direction of the conveyance member. The developer recovered to the second chamber is restricted by the extended portion from moving toward the first chamber while remaining on a surface layer of the developer, and the developer is agitated with the surrounding developer.

Abstract: According to an aspect, a display device with a touch detection function includes: a display unit; a detecting unit; and a control unit that controls an operation timing of the display unit and the detecting unit. The control unit performs display processing and touch detection processing alternately a plurality of times in a display period of an image of one frame, the display processing being processing of performing control on the electric charge, the touch detection processing being processing of performing the touch detection. The control unit varies a length of a first period, a length of a second period, or both in display periods of images of two frames that are displayed consecutively, the first period being a period in which the display processing is performed once, the second period being a period in which the touch detection processing is performed once.

Abstract: A display device with a touch detection function includes a substrate, pixel electrodes arranged in a matrix in a display region on a plane parallel to the substrate, a display function layer having a function to display the image in the display region, drive electrodes provided facing the pixel electrodes, touch detection electrodes that form electrostatic capacitance between there and the drive electrodes, a control unit that generates a control signal to switch between a display operation period for applying a display signal between the pixel and drive electrodes and a display stop period for stopping the display operation. The control unit generates first and second control signals respectively having a first frequency and a second frequency that is different from the first frequency, and has first and second operation modes respectively including a period controlled by the first control signal and a period controlled by the second control signal.

Abstract: According to one embodiment, a pixel signal from a memory is supplied to an arbitrary pixel. A controller selectively switches a scanning frequency of common electrodes including a touch detection system, between a higher frequency and a lower frequency, and allocates banks in the memory, each bank having a capacity of a fixed number of items of the pixel data. The controller defines one unit including a group of lines of the pixel data, sets a line number of the one unit to the fixed number when the scanning frequency is the higher frequency, and sets the line number of the one unit to another line number which is greater than the fixed number when the scanning frequency is the lower frequency.

Abstract: A developing device includes a developer bearing member which bears a two-component developer including a toner and carrier, a magnet member disposed inside the developer bearing member, and a developer regulating member which regulates a layer thickness of the developer borne on the developer bearing member. The developer regulating member is made of magnetic material and is fixed at both end portions in a longitudinal direction. Grooves are formed on a surface of the developer bearing member, and a developer conveying force of the grooves at a central portion of the developer bearing member in the longitudinal direction is larger than a developer conveying force of the grooves at an end portion of the developer bearing member in the longitudinal direction.