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| Number | Title | Issue Date |
| 7821526 | Image forming apparatus An image forming apparatus is configured, in performing changing of a rotation speed of a scanner motor and forming of an image density adjustment patch in the same page interval, to change the rotation speed of the scanner motor before forming the image density adj... | 10/26/2010 |
| 7777768 | Image forming apparatus An image forming apparatus is capable of printing half-toned images of high quality. The image forming apparatus includes a photoconductive body and a light emitting element array. A plurality of light emitting elements is aligned in the light emitting element array... | 08/17/2010 |
| 7692675 | Print head driving method and image formation apparatus using the same A print head driving method controls a gradation of a print head employing an array light source of a lower resolution and an array light source of a higher resolution based on image data represented by 2n bits, wherein n is zero or a positive integer, an... | 04/06/2010 |
| 7545399 | Line head and image forming apparatus using the same A line head includes light-emitting element lines formed by arranging a plurality of light sources in a line shape in a main scanning direction. Each of the light sources is turned on/off corresponding to image data. Light beams emitted from the light sources pass t... | 06/09/2009 |
| 7525560 | Image forming apparatus and control method thereof It is determined whether a low density area in which pixels having density less than a predetermined density exist in succession is included in an image signal or not, and if the low density area exists, an image is formed by irradiating the laser light in a first c... | 04/28/2009 |
| 7405743 | Image forming method and apparatus An image forming method using an image forming apparatus including: a latent image carrier whose surface is driven in a sub scanning direction; a deflector which scans a beam spot reciprocally in a main scanning direction substantially perpendicular to the sub scann... | 07/29/2008 |
| 7403735 | Image formation apparatus using an electrophotographic process An image formation apparatus using an elecrophotographic process for obtaining a high quality image with tone value R2 of equal to or more than 0.98 is provided. The resolution for light-writing is equal to or more than 1200 dpi and/or light-writing is pe... | 07/22/2008 |
| 7400335 | Method for printing a halftone digital image A method for printing a halftone digital image on both a printing press and a color proofer using the same binary digital data which comprises making a printing plate from the binary digital data; making a press sheet using a press with the printing plate; sending t... | 07/15/2008 |
| 7382387 | Image forming apparatus and image density correction device An image forming apparatus, having a submodule that causes non-uniformity in density in a slow-scanning direction in accordance with rotation, includes a correction image forming unit that forms an image for density correction, in cooperation with the submodule, a d... | 06/03/2008 |
| 7369274 | Color error diffusion method A color error diffusion method effective between a color image input device operating in one color space and a color image output device operating in another color space. The method includes the steps of (a) preparing a final color palette for use in a practice of v... | 05/06/2008 |
| 7369150 | Method, system and program product for amplitude modulated multiple pel print quality enhancement Disclosed is a method, system and program product for performing multiple-pel print quality enhancement (PQE) using amplitude modulation. A determination is made of an adjusted peak amplitudes value of each pel of an image. At least two adjacent pels are then groupe... | 05/06/2008 |
| 7365874 | Printer for authenticating a replaceable ink cartridge A printer is provided for authenticating a replaceable ink cartridge. The printer includes a processor. The replaceable ink cartridge can be releasably coupled to the processor and includes a first integrated circuit (IC). A printhead is interfaced to the processor ... | 04/29/2008 |
| 7362469 | System and method for calculating toner usage A system and method for calculating the toner usage of a multifunction peripheral device using software and the compressed form of the raster image without uncompressing the image. The method enables the calculation of toner usage based on the statistics of actual c... | 04/22/2008 |
| 7358980 | Imaging device and methods In an embodiment, a region of a photoconductor is exposed to light having an intensity below a threshold sufficient to produce a marking-material-free region or a marking material containing region. ... | 04/15/2008 |
| 7358983 | Printing apparatus A printing apparatus for printing an image onto a recording medium based on input image data, comprises an electrostatic latent image carrier for forming an electrostatic latent image, and an exposure controller for forming the electrostatic latent image correspondi... | 04/15/2008 |
| 7352492 | Method for compensating for printer characteristics What is disclosed is a method for compensating for printer characteristics having a tone reproduction curve which is either too rough to be fitted by interpolation or which does not have a simple parametric function. The method comprising first placing a first set o... | 04/01/2008 |
| RE40170 | Multi-tone image processing method and apparatus A multi-tone image processing method and apparatus in which mutually dissimilar tone levels are realized by changing the additive condition of recording energy by means of different recording positions, even when the number of recording operations within a specific ... | 03/25/2008 |
| 7345791 | Image processing device and image processing method An image processing device for processing an input image so as to reproduce a halftone, includes: a matrix setting section for setting a threshold matrix having a plurality of elements arranged in M columns×N rows, at least two threshold values being stored in each... | 03/18/2008 |
| 7339603 | Exposure device for an electrophotographic apparatus An exposure device for an electrophotographic apparatus including one or more laser light sources which expose an image carrier in accordance with a print information signal supplied from an external information processing apparatus, a resolution switching lens, and... | 03/04/2008 |
| 7330290 | Image forming apparatus An image forming apparatus adds a plurality of dots of image data in the subscanning direction and starts generating a density from a particular pixel, and switches PWM (Pulse Width Modulation) right and left phases in order to concentrate potentials and to increase... | 02/12/2008 |
| 7330291 | Dither mask creating method and creating device In a computer generation of a dither mask for conversion of a continuous-tone image into a halftone image, a pixel array having a size in accordance with the dither mask is partitioned into blocks. Initial pixel values are determined such that the occurrences of pix... | 02/12/2008 |
| 7327481 | Open coventuring in a remote hardcopy proofing service, with preserved clientele, through interface sharing Conventional obstacles to entry and survival of small graphic-arts service providers are softened—particularly for those businesses that operate as computerized “ASP” enterprises involving wide-area networks—by encouraging small operators to coexist effectiv... | 02/05/2008 |
| 7324247 | Image processing apparatus, image processing program and storage medium storing the program An image processing apparatus includes a reduced image generating part generating a reduced image having a lower resolution than that of an original digital image. A first extracting part distinctly extracts a first foreground image and a first background image from... | 01/29/2008 |
| 7319547 | Color printer calibration A method of determining substrate and ink compatibility includes providing a test pattern having a range of ink loading levels and including test features corresponding to at least one of text and graphics; identifying a substrate; identifying an ink set; printing t... | 01/15/2008 |
| 7319549 | Multiple weight error diffusion A method for halftoning includes the steps of defining a first set of weight sets, and defining a second set of weight sets. A first error associated with a first pixel location of a plurality of pixel locations is diffused to a first neighboring at least one pixel ... | 01/15/2008 |
| 7315315 | Halftone processing method in laser printer and apparatus using the same A halftone processing method for correcting the variation in light intensity on a photoconductive drum and an apparatus using the same, wherein the method includes the steps of preparing a plurality of dithering functions, detecting the position where image data for... | 01/01/2008 |
| 7307754 | Density control method for image control apparatuses and image forming apparatus capable of executing the method There is provided an image forming apparatus which is capable of quickly performing measurements required for obtaining a proper image density. The image forming apparatus having a plurality of image forming apparatuses performs an image density adjustment control p... | 12/11/2007 |
| 7301552 | Image forming apparatus with printing data correction arrangement An image forming apparatus with a plurality of driven elements has a memory for storing driving data on each of the driven elements for driving the driven elements, and a computing unit that reads, from the memory, driving data on a driven element corresponding to a... | 11/27/2007 |
| 7302111 | Graphics engine for high precision lithography The present invention includes a method to use a phase modulating micromirror array to create an intensity image that has high image fidelity, good stability through focus and good x-y symmetry. Particular aspects of the present invention are described in the claims... | 11/27/2007 |
| 7292612 | Semiconductor laser drive apparatus, optical write apparatus, imaging apparatus, and semiconductor laser drive method A semiconductor laser drive apparatus and method are disclosed in order to obtain an optimal laser emission pulse that can reduce inherent light emission that may cause fogging and degradation of a photoconductor and also reduce turn on delay. Specifically, a light ... | 11/06/2007 |
| 7289241 | Printing method with selectable fast printing mode and apparatus for same A printing method for a laser beam printer, including: generating a first video signal for printing a document image; converting the first video signal into a second video signal when a fast printing mode is selected; generating a driving signal for the fast printin... | 10/30/2007 |
| 7289114 | Generating and displaying spatially offset sub-frames A method of displaying an image with a display device includes receiving image data for the image. A first sub-frame and a second sub-frame are generated based on combinations of pixel values from the image data. The method includes alternating between displaying th... | 10/30/2007 |
| 7283151 | Pixel clock generation device causing state transition of pixel clock according to detected state transition and phase data indicating phase shift amount A transition detection circuit detects a transition of a state of a pixel clock, and outputs a detection signal according to a timing of the detected state transition. A control signal generation circuit generates a control signal according to the detection signal a... | 10/16/2007 |
| 7280132 | Method and device for imaging a printing form A method for imaging a printing form (10) using at least one controllable light source (42) is described, a number of image spots (20) being generated at a number of positions on the printing form (10) in accordance with image data in a b... | 10/09/2007 |
| 7270918 | Printing system, process, and product with microprinting The invention relates to printing of documents, for example bank checks. According to the various aspects of the invention, a printing system, process and product with microprinting are provided. Documents printed as described may include digitally variable micropri... | 09/18/2007 |
| 7268797 | Image forming apparatus and method of controlling same One scanning interval of a laser beam is divided into a plurality of blocks, correction data, which corresponds to optical characteristics of an optical unit placed between a laser element and a photosensitive drum, is stored in memory in association with each block... | 09/11/2007 |
| 7268915 | Image processing apparatus, image processing method, control program, and recording medium An object of this invention is to provide an image processing apparatus capable of preventing any color misregistration in printing even when the image processing apparatus is divided into a plurality of semiconductor integrated circuits. An image processing apparat... | 09/11/2007 |
| 7268798 | Image forming apparatus which executes an image quality control The present invention uses a pattern that enables image quality maintaining control to be performed at a resolution lower than that used for a normal image forming process. Thus, during an initial operation upon power-on, the image quality maintaining control is per... | 09/11/2007 |
| 7265768 | Image forming apparatus A photoreceptor cleanerless image forming apparatus and method for overlappingly forming yellow, cyan, magenta, and black toner images and decreasing color mixture or an exposure error due to reverse transfer toner or untransferred toner are provided. The image form... | 09/04/2007 |
| 7266215 | Image forming apparatus and copy management system An additional data useful for the management of copies of a document for an image forming apparatus is embedded in a hard copy of the document. The additional data is embedded in an inherent image of a document as discrete dots arranged in a prescribed format. Prefe... | 09/04/2007 |
