Patent application number | Description | Published |
20120147114 | LIGHT EMISSION CONTROL DEVICE, LIGHT EMISSION CONTROL METHOD, AND IMAGE FORMING APPARATUS - A light emission control device images an electrostatic latent image on a photosensitive element by a plurality of light emitting elements corresponding to a line in a second direction perpendicular to a first direction which is a rotational direction the photosensitive element. The light emission control device includes: a detecting unit that detects a rotational position of the photosensitive element, in the first direction, corresponding to a line in the second direction; an acquiring unit that acquires a distance between the light emitting elements and the rotational position of the photosensitive element in the first direction detected by the detecting unit; and a control unit that controls light emission by the light emitting elements according to the distance acquired by the acquiring unit and corrects a fluctuation in a density of a visible image converted from the electrostatic latent image. | 06-14-2012 |
20120154827 | LINE-HEAD CONTROL DEVICE, IMAGE FORMING APPARATUS, AND LINE-HEAD CONTROL METHOD - A line-head control device that controls a line head includes: a calculation unit that divides image data into a plurality of areas in sub-scanning direction and calculates a printing percentage for each of the areas; an allocation unit that allocates a total correction amount, for correcting magnification of the image data in the sub-scanning direction, to the areas according to the printing percentage for each of the areas calculated by the calculation unit; and a control unit that changes an emission period of the light emitted from the line head so as to satisfy a partial correction amount that is an allocation of the total correction amount to each of the areas, exposes the image carrier to the light emitted from the line head with the changed light emission period, thereby causing a latent image to be formed on the image carrier based on the image data. | 06-21-2012 |
20120287479 | OPTICAL SCANNER, IMAGE FORMING APPARATUS, AND BUFFER CONTROL METHOD FOR OPTICAL SCANNER - In an optical scanner, when an emission control unit varies a period at which image data is output from an output buffer of the emission control unit in order to correct a sub scan magnification of a LED array and a vacant region of an input buffer of the emission control unit ceases to exist, a buffer control unit temporarily stores the image data in a vacant region of a memory of an image correcting unit, and transfers the image data temporarily stored in the memory to the input buffer when the vacant region is generated in the input buffer. | 11-15-2012 |
20130044176 | OPTICAL WRITING DEVICE, IMAGE FORMING APPARATUS, AND METHOD FOR CONTROLLING OPTICAL WRITING DEVICE - An optical writing device forms an electrostatic latent image and includes a pixel-information acquiring unit that acquires pixel information and stores the acquired pixel information in a storage medium with respect to each main scanning line; a tilt correcting unit that generates a tilt correction signal specifying a main scanning line from which the pixel information to be input to a light source is read out from the storage medium in order to correct a tilt of the electrostatic latent image; a position correcting unit that generates a position correction signal specifying a timing to input the pixel information to the light source in order to correct a position of the electrostatic latent image; and a pixel-information-input control unit that controls input of the pixel information from the storage medium to the light source in response to the tilt correction signal and the position correction signal. | 02-21-2013 |
20130063536 | LIGHT SOURCE CONTROL APPARATUS AND IMAGE FORMING APPARATUS - A light source control apparatus which controls, based on image data input, light emission of a light source which forms an electrostatic latent image on an image bearing body in an electrophotographic image forming apparatus is disclosed, including a pattern generating unit which generates an internal pattern for position aligning and concentration correcting according to the image data; and a mirroring processing unit which performs a process of mirroring the image data and the internal pattern at a later stage of the pattern generating unit. | 03-14-2013 |
20130070040 | EXPOSURE CONTROL APPARATUS, IMAGE FORMING APPARATUS, AND EXPOSURE CONTROL METHOD - An exposure control apparatus includes: a plurality of line memories; a processing unit that processes image data by successively recording the image data to the plurality of line memories, and successively reading the image data from the plurality of line memories; and an exposing unit that performs, with an exposure cycle, an exposure process according to the processed image data, and that forms a latent image based on the image data onto an image carrier, wherein the image data is transferred with a cycle which is N times as high as the exposure cycle (N is a natural number), and the processing unit reads the image data N times with the exposure cycle. | 03-21-2013 |
20130071130 | TONER CONSUMPTION CALCULATOR, IMAGE FORMING APPARATUS, AND TONER CONSUMPTION CALCULATION METHOD - A toner consumption calculator includes a plurality of line memories; a recorder that sequentially records image data including a plurality of pixels into the line memories; a skew correction unit that performs skew correction on the image data by sequentially reading the image data from the line memories while controlling read timing; and a counter that sequentially reads the image data from the line memories and counts toner consumption of a target pixel on the basis of light amounts of surrounding pixels of the target pixel. | 03-21-2013 |
20130084109 | IMAGE FORMING APPARATUS - An image forming apparatus can transfer a plurality of color component images onto a surface of a recording medium to form an image on the recording medium. The image forming apparatus includes a pattern generation part to generate information about an alignment pattern to be used for a calibration of an image forming, a plurality of stations each including a photosensitive drum to form an alignment pattern corresponding to each of a plurality of color components onto a carry belt or the recording medium, and a read part to detect a plurality of alignment patterns formed by the plurality of stations. | 04-04-2013 |
20130207339 | IMAGE FORMING DEVICE AND CONTROL METHOD FOR IMAGE FORMING DEVICE - According to an embodiment, provided is an image forming device that includes: an image forming unit forming an image in a predetermined cycle in a direction orthogonal to a conveying direction of a printing medium; a velocity acquisition unit acquiring a conveying velocity of the printing medium at a position where the image is formed by the image forming unit; and a correcting unit correcting the cycle on which the image forming unit forms the image in accordance with the conveying velocity acquired by the velocity acquisition unit. | 08-15-2013 |
20130242318 | IMAGE FORMING APPARATUS AND METHOD FOR CONTROLLING THE SAME - In the invention, an inclination amount of sensors is reflected in positional deviation correction patterns, and for correcting formation positions of images of various colors, the positional deviation correction patterns are formed on a conveying belt. The positional deviation correction patterns are detected by the sensors. A control unit calculates positional deviation correction amounts based on detection results of the positional deviation correction patterns. Based on the calculated positional deviation correction amounts, the control unit performs calculation for correcting the positional deviation correction patterns, and cancels the inclination amount reflected in the calculation results to obtain final positional deviation correction amounts. Skew correction is performed based on the final positional deviation correction amounts, and thus, the positional deviations are corrected. | 09-19-2013 |
20130343775 | IMAGE FORMING APPARATUS - An image forming apparatus comprises: an image forming unit configured to form an image quality adjustment pattern image on an image carrier to be driven at a predetermined speed; a detector configured to detect the image quality adjustment pattern image; an image quality adjustment controller configured to control image quality adjustment processing in accordance with a detection result by the detector; a speed change unit configured to change an image formation speed indicating a speed at which an image is formed, and an interval change unit configured to change an interval at which the detector acquires a detection result in accordance with a change amount between the image formation speed before changed by the speed change unit and the image formation speed after changed. | 12-26-2013 |
20140002564 | OPTICAL WRITING CONTROL DEVICE, IMAGE FORMING APPARATUS, AND OPTICAL WRITING CONTROL METHOD | 01-02-2014 |
20140049591 | OPTICAL WRITING DEVICE, IMAGE FORMING APPARATUS, AND CONTROL METHOD OF OPTICAL WRITING DEVICE - An optical writing device forming an electrical latent image on a photoreceptor includes an optical writing unit configured to apply light to the photoreceptor, a power supply unit configured to supply power to the optical writing unit, a power supply status detector configured to detect a power supply status of the power supplied from the power supply unit to the optical writing unit, and output power supply information or power cutoff information, a power cutoff information retaining unit configured to retain the power cutoff information when the power cutoff information is output from the power supply status detector, and a power sensor configured to sense a power supply status of the power supplied by the power supply unit based on the power cutoff information retained by the power cutoff information retaining unit. | 02-20-2014 |
20140078521 | IMAGE FORMING APPARATUS, METHOD FOR PERFORMING THE SAME AND COMPUTER READABLE MEDIUM - An image forming apparatus comprising: a resolution conversion unit configured to convert the resolution of a pixel provided by input image data; a gradation conversion unit configured to perform matrix conversion onto the pixel; and a writing unit configured to perform a write operation, wherein, in the normal mode, the gradation conversion unit performs matrix conversion onto the pixel with reference to the gradation conversion table for the normal mode, and the writing unit performs the write operation of the pixel in a normal order that is the order image data being input into the image forming apparatus, and in the reverse mode, the gradation conversion unit performs matrix conversion onto the pixel with reference to the gradation conversion table for the reverse mode, and the writing unit performs the write operation of the pixel in a reverse order opposite to the normal order. | 03-20-2014 |
20140139607 | OPTICAL WRITING DEVICE, IMAGE FORMING APPARATUS, AND METHOD OF CONTROLLING OPTICAL WRITING DEVICE - An optical writing device is configured to form electrostatic latent images on a plurality of photosensitive elements by a plurality of light sources. The optical writing device includes: an image-data acquiring section that acquires image data; and a light-source control section that performs light-emission control on the light source based on pixel data generated from acquired image data, and also performs a neutralization process on the photosensitive element by controlling the light source to expose the photosensitive element to light. In the neutralization process, the light-source control section divides a period during which light-on/off control can be performed on the light source, into sub-periods based on pixel data input to the light-source control section, and causes the light sources to be lit in any one of the sub-periods so as to always place at least one of the plurality of light sources in a light-off state. | 05-22-2014 |
20140153943 | IMAGE FORMING APPARATUS AND CONVEYANCE CONTROL METHOD - An image forming apparatus including: a conveyance mechanism conveying a first pattern formed by a first image forming unit among image forming units, a second pattern formed by a second image forming unit among the image forming units; a detection unit detecting the first pattern and the second pattern; and a control unit controlling, when a first condition is satisfied, a timing of conveying a recording sheet having the image formed by the first image forming unit is transferred based on a first time required after the formation of the first pattern and before detecting the first pattern, and controlling, when a second condition is satisfied, a timing of conveying the recording sheet having the image formed by the second image forming unit is transferred based on a second time required after the formation of the second pattern and before detecting the second pattern. | 06-05-2014 |