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7602411 |
Image forming apparatus
An image forming apparatus receives halftone print data through an inputting section. A dot forming section irradiates the charged surface of an image bearing body with light to form a plurality of...
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7586657 |
Color processing method
To generate conversion data enabling to appropriately control a colorant amount, a profile for storing correspondence between device color data and a colorimetry value and control information for...
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7583908 |
Image forming apparatus using an electrophotographic process and image forming method
An image forming apparatus of the invention includes a photoconductor, an exposure unit to expose the photoconductor, a developing unit to develop the photoconductor to form a developed image, a...
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7580051 |
Method and apparatus for imaging a printing form
A method for imaging a printing form is particularly suited for a printing form exposer or a printing unit of a press. A plurality of light sources produce image points in a row on the printing...
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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...
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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...
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7494202 |
Image forming apparatus and a sub-line control section for an image forming apparatus
What is disclosed is an image forming apparatus to form each of lines formed with different sizes of dots, comprising: a print control section to control printing by providing elements for...
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7480063 |
Print system printing data while storing under compressed state, and printer for use therein
In a printing process with a print head having multiple dot formation elements for creating dots, an overlap printing technique that uses at least two dot formation elements for formation of each...
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7450144 |
Image forming apparatus
A photo-printing system includes a laser exposure unit, a reference clock generation unit, an image input unit, and a controller. The image input unit receives first pixel data and second pixel...
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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...
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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 R 2 of equal to or more than 0.98 is provided. The resolution for light-writing...
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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;...
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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...
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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.
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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...
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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...
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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...
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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....
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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...
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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...
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7262882 |
Distribution curve generating device
A plurality of color signals indicative of a plurality of color patterns are processed based on a first distribution curve to distribute the original color signals into color signals for normal ink...
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7253922 |
Monochromatic printer and image processing apparatus
A printing apparatus is provided with multiple achromatic color inks having different densities and at least one chromatic color ink. Diversity of dots are created with the multiple achromatic...
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7230634 |
Method for generating charge images of images to be printed on a moving photoconductive intermediate support of an electrographic printing or copying device
A method and arrangement for producing charge images of images to be printed in an electro-photographic printer or copier device. The method and arrangement provides for printing of different gray...
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7222932 |
Printer
The present invention provides a compact printer that can print images of high quality even if the images are printed successively. A temperature at the time of turn-on is detected by a temperature...
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7209155 |
Printer device
Temperature is detected by a temperature sensor disposed near a recording head. When the detection result is a temperature that is higher than room temperature, an appropriate movement amount of...
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7088479 |
Image processing apparatus for electrophotography and electrophotographic apparatus utilizing the same
An image processing apparatus, which performs color conversion for input tone data in an RGB color space to obtain tone data for a CMY color space, and which performs halftone processing to convert...
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6965393 |
Image forming apparatus
An image forming apparatus is provided that is capable of forming an image with excellent gradation quality without affected by variations in the sensitivity characteristic of the photoreceptor and...
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6956594 |
Image forming apparatus including two image bearing members and featuring a variable dot image
The image forming apparatus includes, a movable first image bearing member on which a toner image is formed; and a movable second image bearing member which is brought into contact with the first...
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6943814 |
Gradation display method
In a gradation display method, an image is divided into pixels having fine areas, this pixel is furthermore divided into very fine pixels (Si) having very fine areas, and then gradation is...
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6917374 |
Image forming apparatus having an exposure device changing pulse width of a light beam based on pattern data of an image
An image forming apparatus using a multi-scan system is capable of forming an image at a high speed. An exposure device scans a surface of the photo conductor by light beams emitted by a plurality...
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6895193 |
Image forming apparatus and method for estimating the amount of toner consumption
An image forming apparatus and toner-consumption-estimation method that can accurately estimate the amount of consumed toner regardless of the type of image. A printing-pixel-counting unit counts...
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6887635 |
Image forming method and image forming apparatus
The image forming method carries out reverse development with a developer that has a toner prepared by agglomerating resin particles in a water based medium.
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6870638 |
Halftone processing apparatus using distributing PWM method
An image processing apparatus for a laser printer, wherein a halftone control through laser pulse modulation (PWM) is used in combination with distributed clustered-dot halftone processing which...
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6819452 |
Method and system for modifying portions of an image bit stream representing printing horizontal lines and edges to improve print quality
A system and method for minimizing distortion in printed images due to toner explosion receives the incoming image bit stream and monitors the stream for horizontal lines and edges that would be...
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6816179 |
Color printing apparatus that reduces toner amount
An apparatus for printing a color image includes a printer driver which processes input image data to generate printable image data, and further includes one or more color profiles which are used...
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6803933 |
Systems and methods for dot gain determination and dot gain based printing
The present invention generally provides methods and systems for printing. A statistical learning system is used to determine dot gain.
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6795100 |
Method and apparatus for controlling a light signal in electrophotographic developing type printer
An optical signal control process and circuit providing an improved electronic photography method reproduction apparatus. The reproduction apparatus has a data transmitting unit converting data to...
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6778298 |
Image forming apparatus
There is provided an image forming apparatus that enables the formation of high-quality multi-level images by ensuring that the size of blocks into which the image is to be divided is specified in...
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6750892 |
Density correction method and image forming apparatus
Based on the density of an image formed on a photosensitive member or an image recording medium, an amount of correction for uniformalizing the image density in a main scanning direction of a light...
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6721065 |
Method and apparatus for printing images
The invention is a method and apparatus for printing images intended to appear to be of solid uniform color and intensity while conserving the amount of image-generating medium used to form the...
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6714225 |
Image formation apparatus and image formation method
When a halftone image region that is below a predetermined density is to be reproduced, a processing unit controlling an exposure unit selects an exposure pattern that can represent a record dot...
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6694109 |
Real-time control of tone reproduction curve by redefinition of lookup tables from fit of in-line enhanced toner area coverage (ETAC) data
A method and system having real-time control of tone reproduction curves. The machine comprises: a moving photoreceptor; a means for storing a target tone reproduction curve; and, a means for...
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6686942 |
Memory device for an image forming apparatus storing characteristics information about a process cartridge detachably attachable to the apparatus
When a user changes a density adjusting value (developing contrast), and even when variations in the usage state of process characteristics (of the photosensitive body and the developing device) of...
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6636251 |
Image forming apparatus and method
An image forming and apparatus is provided in which a halftone density of an image is stabilized irrespective of a timing at which writing on scanning lines is started, even when using multiple...
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6608641 |
Electrophotographic apparatus and method for using textured receivers
A printer for printing color toner images on a receiver member of any of a variety of textures. The printer has a number of tandemly arranged electrophotographic image-forming modules respectively...
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6603496 |
Image recording method and apparatus enlarging isolated dots
A dot-matrix image-forming device such as an electrophotographic printer alters the size of a dot according to the surrounding dot pattern, thereby compensating for the tendency of isolated dots or...
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6559875 |
Image forming apparatus with pixel density based light beam control
An image forming apparatus which includes an image bearing body and a light beam scanner for exposing the image bearing body, which is charged, based on an image signal and forming an electrostatic...
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6538677 |
Apparatus and method for gray level printing
A copier or a printer 10 includes a controller 16/30 with a rendering algorithm that groups sets of adjacent pixels into sets of adjacent cells where each cell corresponds to a halftone dot of...
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6537738 |
System and method for making smooth diagonal components with a digital photolithography system
A digital photolithography system is provided that is capable of making smooth diagonal components. The system includes a computer for providing a first digital pattern to a digital pixel panel,...
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6535234 |
Method for setting quantity of light of light-emitting element array
A method for setting the amount of light in an array of light-emitting thyristors, each thyristor having I-L characteristic in which a luminous efficiency is decreased in a lower current field, is...
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