摘要:
An image forming apparatus includes a latent image bearer, a charger to charge the latent image bearer with a charging bias obtained by superimposing a charge fluctuation voltage to reduce an image density fluctuation on a direct current charging voltage, a writing device to write a latent image on the latent image bearer with writing intensity obtained by superimposing fluctuating writing intensity to reduce an image density fluctuation on constant writing intensity, a developing sleeve to which a developing bias obtained by superimposing a fluctuating developing voltage to reduce an image density fluctuation on a direct current developing voltage is applied to develop the latent image, and circuitry to control the charging bias, the writing intensity, and the developing bias. The circuitry changes the charge fluctuation voltage and the fluctuating developing voltage depending on whether the writing device writes the latent image with the fluctuating writing intensity.
摘要:
An image forming apparatus that includes an imaging device, a transferrer, a rotator, a rotation position sensor, an adhesion amount sensor, a power supply, and a controller. The controller executes a construction process to construct output pattern data to change a voltage output from the power supply, according to a result obtained by detecting a toner adhesion amount of a toner image for density unevenness detection and a detection result from the rotation position sensor obtained when the toner image is formed, and an output change process to execute a predetermined process while changing the voltage according to the detection result and the output pattern data. The controller executes a determination process to determine propriety of an output range of the voltage output from the power supply by the output change process and a data process for a shift to shift the range when a determination result is inappropriate.
摘要:
An image forming apparatus includes an image forming device, an electric current detector, and a controller. The image forming device includes a latent image bearer, a charging rotator, a charging power supply, a latent image writing unit, and a developing unit. The controller (i) determines an uneven electric resistance of the charging rotator in a direction of rotation of the charging rotator, based on a detection result by the electric current detector, (ii) perform, at a predetermined timing, data construction processing to construct change pattern data to change an output value of a voltage from the charging power supply according to a predetermined pattern, based on the uneven electric resistance, and (iii) perform, in a print job to form a toner image in response to an instruction, voltage changing processing to charge the latent image bearer while changing the output value of the voltage, based on the change pattern data.
摘要:
A toner adhesion amount information detection unit detects toner adhesion amount information. An image density unevenness detection unit detects image density unevenness in an image. A toner image forming unit forms a latent image on the surface of the latent image bearer, and performs the developing processing by applying developing bias between the latent image bearer and a developer bearer. The toner adhesion amount information detection unit detects, as the toner adhesion amount information, developing current flowing between the developer bearer and the latent image bearer. The image density unevenness detection unit obtains, from the image information, an index value indicating a toner adhesion amount of a toner image portion when the developing current is detected, and detects the image density unevenness based on the image information and the developing current when the index value indicates a toner adhesion amount of a prescribed amount or more.
摘要:
An image forming apparatus includes: a latent image forming unit that forms a latent image on a latent image bearer with light from a light source; and a correction data generating unit that includes: an acquiring unit that acquires, for each position, a correction value of an intensity of the light source to equalize a density distribution of a latent image; a quantizing unit that generates a correction data for each position by quantizing a correction value for each position; and an excessive correction suppressing unit that outputs the correction data after reducing an amount of change from an immediately preceding latent image formation position, with respect to a position at which an absolute value of a restored value indicating a correction amount and generated based on the correction data exceeds an absolute value of the correction value.
摘要:
An image forming apparatus includes an image density detector, an image forming device, a rotator, an image density controller, and a timing correction data obtainer. The image density detector detects a toner density of an image formed on an image bearing member. An image forming device forms the image using a density adjustable element that adjusts the density of the image. The rotator forms an image pattern while the density adjustable element is changed, and a density thereof is detected by the image density detector. The image density controller controls the image forming device using a density correction data for the density adjustable element corresponding to a rotational period of the rotator. The timing correction data obtainer obtains timing correction data for correction of driving timing of the image forming device based on a change in the density of the image pattern detected by the image density detector.
摘要:
Disclosed is a liquid treatment apparatus for processing a lower surface of the substrate. The apparatus includes a first nozzle disposed below a lower surface of the substrate retained by the substrate retaining unit to eject a treatment liquid towards the lower surface of the substrate, the first nozzle having a plurality of first ejection ports, which are arrayed from a position opposing a central portion of the substrate retained by the substrate retaining unit to a position opposing a peripheral portion of the substrate retained by the substrate retaining unit. An ejecting direction of the treatment liquid ejected from the first ejection port is inclined towards a rotation direction of the substrate rotated by the rotational driving unit.
摘要:
In an image forming apparatus, a first controller forms a first image pattern on an image bearer and determines a first image formation condition based on a detection result of density of a toner image. The first controller then controls a toner image forming device based on the first image formation condition. A second controller forms a second image pattern different from the first image pattern on an image bearer and determines a second image formation condition based on a detection result of density of a toner image. The second controller then controls a toner image forming device based on the second image formation condition.
摘要:
An image forming apparatus includes a latent-image bearing body, a charging unit, a latent-image writing unit, a development unit, a development power, and a bias control unit. After a start of an image forming operation, the bias control unit performs a process of constantly maintaining an output of a development bias at an adjustment bias value. The adjustment bias value is a central value in a periodic fluctuation range of the output of the development bias. At a timing at which a difference of the development bias from the adjustment bias value in the periodic fluctuation range is less than or equal to a predetermined threshold value, the bias control unit performs switching from the process of constantly maintaining the output of the development bias at the adjustment bias value to a process of periodically changing the output of the development bias based on development bias control data.
摘要:
A memory stores first configuration information indicating a plurality of logical storage areas and a first condition defining a state of a storage apparatus as a trigger for the storage apparatus to move data. A CPU acquires: a second condition defining a state of a computer as a trigger for the computer to move a first object, which is stored in a first logical storage area among the plurality of logical storage areas and performed by the computer, to another one of the plurality of logical storage areas; second configuration information associating the first object and the first logical storage area; first state information indicating a state of the plurality of logical storage areas; and second state information indicating a state of the first object. If a state of performing data movement is set, the CPU identifies a cause of the state of performing the data movement.