Abstract: An optical scanning apparatus is configured to comprise (a) a deflector for deflecting and scanning a plurality of bundled incident laser beams, (b) a conversion optical system for converting the bundle of laser beams moving at a constant angular velocity into a bundle of laser beams moving at a constant linear velocity, (c) reflection mirrors for separating the bundled laser beams into four corresponding to respective colors, (d) photosensitive members for forming respective electrostatic latent images by means of the laser beams corresponding to the respective colors, wherein one of the photosensitive members is disposed on a plane parallel to an area defined by the laser beams traveling between the deflector and the conversion optical system and (e) a correction optical system for correcting curvatures of field with respect to the respective laser beams and leading the laser beams to the photosensitive members.

Abstract: An image forming apparatus maintains a constant beam scanning state so that, light beams scan each drum always in the same state once a desired color overlapping accuracy is obtained by controlling color registration in color image formation. This mechanism achieves constantly fine color overlapping without forming a test pattern several times or consuming toner unnecessarily. A beam passage switch is provided in a laser scanning system. Sensors provided near each photosensitive drum determine whether each light beam has scanned a certain portion with no inclination or a certain scanning area, or whether each image magnification provides a desired size.

Abstract: A sequential color scanner capable of generating both two and three dimensional moving color images has only one x- and y-deflection channel. The system includes first, second, and third optical signal generators for generating a first, second, and third optical signal, respectively. Each optical signal is characterized one of the three primary colors. The first, second, and third light signals are blue, green, and red, although not necessarily in that order. The first optical signal is generated along an optical axis. First and second beam combiners direct the second and third optical signals, respectively, along the optical axis. A first optical deflector deflects the optical signals in a first plane, and a second optical deflector for deflecting the optical signals in a second plane that is orthogonal to the first plane. First, second, and third modulators modulate the intensity of the first, second, and third optical signals, respectfully.

Abstract: In an optical printer apparatus designed so that an optical head (100) having an LED light source (110) therein is moved relatively to a sensitized sheet (500) and an image is formed by emitting a plurality of color light beams in regular order from the LED so that the light beams are focused at given spaces on the sensitized sheet, an image pitch P for the color light beams is substantially equal to an integer multiple of the maximum exposure distance D.

Abstract: A compact light weight printhead capable of direct quasi-contact printing includes an OLED structure deposited onto a substrate. The printhead is designed for contact or quasi-contact printing printing, without additional optical elements. The printhead design ensures that the desired pixel sharpness and reduced crosstalk is achieved. Two possible different arrangements for the printhead are disclosed. One arrangement includes at least one array of OLED elements. Each OLED array in this arrangement includes at least one triplet of OLED elements, and each element in each the triplet is capable of emitting radiation in a distinct wavelength range different from the distinct wavelength range of the other two color filters in the same triplet. In the second arrangement, the printhead includes at least one triplet of arrays of individually addressable Organic Light Emitting Diode (OLED) elements.

Abstract: An image processing apparatus capable of color image formation with a plurality of color components, which solves a problem of increment of processing time in monochrome image formation due to correction on image formation conditions with predetermined patch formation. For this purpose, in case of monochrome image formation, even if a tonality control request flag is set, an image formation sequence is started without performing tonality control. Thus processing time can be reduced in monochrome image formation.

Abstract: An image forming apparatus maintains a constant beam scanning state so that light beams scan each drum always in the same state once a desired color overlapping accuracy is obtained by controlling color registration in color image formation. This mechanism achieves constantly fine color overlapping without forming a test pattern several times or consuming toner unnecessarily. A beam passage switch is provided in a laser scanning system. Sensors provided near each photosensitive drum determine whether each light beam has scanned a certain portion with no inclination or a certain scanning area, or whether each image magnification provides a desired size.

Abstract: An image forming apparatus maintains a constant beam scanning state so that light beams scan each drum always in the same state once a desired color overlapping accuracy is obtained by controlling color registration in color image formation. This mechanism achieves constantly fine color overlapping without forming a test pattern several times or consuming toner unnecessarily. A beam passage switch is provided in a laser scanning system. Sensors provided near each photosensitive drum determine whether each light beam has scanned a certain portion with no inclination or a certain scanning area, or whether each image magnification provides a desired size.

Abstract: In an optical printing apparatus for selectively exposing light with respect to a photosensitive recording medium to thereby form a gradation image thereon, there are provided; image data input device for entering more than 4 colors of spectral image data; storage device for storing thereinto the entered spectral image data in the unit of either 1 screen or 1 line; an optical head for outputting more than 4 sorts of light having different wavelengths from each other; and head driving device for converting the stored spectral image data into predetermined exposure time periods, and turning ON the more than 4 sorts of light so as to ON/OFF-drive the optical print head. As a result, this optical printing apparatus is capable of performing a high image quality recording operation. More specifically, a realistic image having a material feeling is formed.

Abstract: An intermediate belt made of an endless belt is provided by 45 degrees inclined horizontally and looped over two rollers at both its ends, and four photosensitive drums are provided in contact with the top surface of this intermediate belt. A reflection mirror is provided over each photosensitive drum, and a single polygon mirror is provided on almost the same level as these reflection mirrors. The polygon mirror is provided on the side of the reflection mirror of which optical path to the corresponding photosensitive drum is the longest so that the optical path lengths from the polygon mirror to the respective photosensitive drums are equal to each other.

Abstract: An optical printer performs optical writing on a film and includes a print head with a luminous source and a plurality of filters selectively set to the luminous source by moving toward a predetermined direction with respect to the luminous source, and a moving unit for allowing the print head to be reciprocated in the predetermined direction. A transfer unit is disposed the print head to allow the filters to be moved by a regular amount, i.e., a predetermined pitch(“c” to “e”), thereby setting a desired filter to the luminous source. The transfer unit is operated to by the regular amount from one end side of the moving region of the print head. Further, a reset unit is disposed to the print head and is operated when the print head is moved more than the moving region from one end side ad of the moving region of the print head, forcing the moved filter to return to the original position.

Abstract: An image forming apparatus including a plurality of image forming cartridges removably mounted to an apparatus body one above the other is disclosed. Structural members each partition off a space between nearby image forming cartridges mounted to the apparatus body. The apparatus is capable of obviating banding ascribable to the vibration of the cartridges.

Abstract: An image-recording system with a first conveying path along which a light and heat sensitive recording material is conveyed from an accommodating cassette at an accommodating section toward a pair of conveying rollers, a second conveying path along which the recording material is conveyed forward and backward through an optical recording section and a heat-developing section, and a third conveying path along which the recording material, after development of an image thereon, is conveyed to an optical fixing section.

Abstract: A multi-beam scanning optical system is provided with a plurality of laser diodes respectively emitting a plurality of laser beams, each of said plurality of laser diodes being accommodated in a casing, and a laser diode holding unit that holds the casings of the plurality of laser diodes. Heat generated by each of the plurality of laser diodes is conducted to each other through the casings of the plurality of laser diodes and the laser diode holding unit.

Abstract: An optical printing device for exposing a photosensitive recording medium to form a grayscale image includes a print head having n rows of recording elements capable of exposure of different colors and aligned in a direction of advancement of the photosensitive recording medium, where n is an integer more than 1, the n rows of recording elements being spaced substantially a multiple of L×(m+k/n) apart in the direction of advancement of the photosensitive recording medium, where L denotes a distance between the centers of recording pixels according to the desired resolution of a recorded image, m is an integer of 1 or more, and k is an integer of 1 or more and less than n. The optical printing device also includes a head driver for driving the print head. Light from the print head is selectively exposed on the photosensitive recording medium to form the grayscale image.

Abstract: The invention provides an optical scanning device for color image formation in which color aberration depending on the variation in the image formation position on the scanned surface caused by the angle change of the optical system.

Abstract: An image processing apparatus capable of color image formation with a plurality of color components, which solves a problem of increment of processing time in monochrome image formation due to correction on image formation conditions with predetermined patch formation. For this purpose, in case of monochrome image formation, even if a tonality control request flag is set, an image formation sequence is started without performing tonality control. Thus processing time can be reduced in monochrome image formation.

Abstract: An optical scanning device which performs an exposing operation with respect to a photosensitive material such as a printing sheet, etc., by scanning with laser beams in respective colors modulated according to image data is arranged so as to modulate light beams in respective colors projected from respective light sources of a red LD, a green-color SHG laser unit and a blue-color SHG laser unit by AOMs according to image data. Then, the clock frequency control section adjusts an exposure scanning clock for each of the AOM drivers for driving these AOMs individually. It is therefore possible to suppress an aberration in color caused by a shift in light beams in respective colors which are to be projected onto the same target position.

Abstract: A multi-beam scanning optical system is provided with a light source unit emitting a plurality of beams. The beams are incident on a polygonal mirror, and deflected thereby to scan in a predetermined scanning range. The scanning beam is incident an f&thgr; lens system. The f&thgr; lens system includes a plurality of lenses, and all the beams pass at least one of the plurality of lenses included in the f&thgr; lens system. The lens, which all the beams pass through, is formed as a single lens element made of single material. Further, the lens contributes to convergence of the beams in the main scanning direction.

Abstract: Light sources of a light beam scanning device of the present invention are an AlGaInP semiconductor laser emitting a light beam of a wavelength of 680 nm, a GaN extremely small surface area light emitting diode (EELED) emitting a light beam of a wavelength of 530 nm, and a GaN EELED emitting a light beam of a wavelength of 470 nm. Such a structure provides a light beam scanning device which is compact, whose manufacturing cost is low, and with which light beams having light emission distributions corresponding to spectral sensitivities of a photosensitive material.

Abstract: An image data control unit for an SLM-based photofinishing system. The control unit is typically used with a photofinishing system in which the SLM provides an exposure region that is smaller than the image to be printed or otherwise produced. Thus, the output image is in motion relative to the SLM, such as by moving the photographic medium under the SLM. To meet system throughput requirements, such systems use an exposure algorithm that exposes each line of the output image with multiple rows of the SLM. The control unit implements the exposure algorithm by reformatting source image data and loading the SLM with SLM settings. It synchronizes these functions to the motion of the photographic medium upon with the image is printed.

Abstract: An image forming apparatus includes a light beam generating and modulating device which generates and modulates a light beam in accordance with an image signal, a light beam deflecting device which deflects the modulated light beam and scans an image carrier so as to form an image.

Abstract: In a laser beam scanner of used for exposing a latent image on a photographic paper, intensities of the laser beams are maintained in predetermined range by compensating amplitude of driving signals supplied to acousto-optic modulators when intensities of the laser beams emitted from laser light sources are varied. The intensities of the laser beams passing through the modulators are sensed by photo sensors and compared with predetermined standard value. When any of the intensity of the laser beam is discrepant from the standard value, a difference between them is calculated and an optical modulation data for controlling the amplitude of the driving signal is compensated by subtracting the difference value from the standard value. Thereby, the amplitude of the driving signal of the modulator is compensated.

Abstract: An LED beam source emits plural light beams which are independently controllable and become incident light of a polygon mirror. The LED beam source comprises LED elements of which light-emitting timing and light intensity are independently controllable, a base member for retaining the LED elements, and a mask plate for commonly covering light emitting sides of the LED elements. The mask plate is formed with beam openings corresponding to the respective outputted beams. Four corners of the mask plate are provided with positioning holes, and four corners of the base member are provided with positioning projections. Assembling is easily performed by inserting the positioning projection into the positioning hole.

Abstract: An optical printer has a DMD as a spatial light modulator. An optical image corresponding to a fraction of a picture frame is projected from the DMD onto a photographic paper at a predetermined time interval. The photographic paper is advanced intermittently by a length corresponding to an exposure area for one optical image. A fluctuation value from a set advanced length for one advancing step is detected at each advancing step and accumulated. The DMD is mounted on a swinging plate whose angle is controllable by a piezoelectric element, to shift the exposure position on the photographic paper. In accordance with an accumulated fluctuation value, drive voltage to the piezoelectric element is changed from a reference value to correct the exposure position so as to print the picture frame without any gap or overlap between the fractions.

Abstract: A vacuum fluorescent printer including a print head (60) having luminous blocks (32, 33, 34) each having a plurality of luminous elements arranged in a main scanning direction for irradiating a photosensitive material with light released from phosphorous objects to which electrons are applied based on a drive signal, thereby forming dots on the photosensitive material. A further luminous block (32b) is provided which is spaced from the luminous blocks (32a, 33, 34) in the sub-scanning direction and used for printing a particular color among the three colors (R, G, B). Each dot of the particular color is formed by light from a plurality of luminous blocks (32a, 32b). A printer controller (7c) is provided for generating a pulsed drive signal as the drive signal. The number of pulses in the drive signal is determined based on a density value of the image data, and the slower a moving speed is in the sub-scanning direction, to the larger pulse width the drive signal is set.

Abstract: The present invention uses LEDs as the light source in a optical printer employing a line scanning method in which an image is produced by relative motion of the light to a photosensitive medium. LEDs are arranged on a mounting substrate with LED pairs, each pair being of the same color, disposed symmetrically as to the center point of the line. Similarly, the power supply lead wires for the LEDs are also disposed symmetrically. In mounting the components on the mounting substrate, a light-intercepting material is used for intercepting light from the side faces of the LEDs.

Abstract: The present invention employs LEDs and a liquid crystal shutter driven in synchronization with the position of the photosensitive paper, thereby eliminating image distortion even where the head of the optical printer apparatus is subjected to unanticipated load during scanning by the head. A rotary encoder (320) is provided on the rotating shaft of the motor (310) that drives the optical head (100), and the drive timing for the LEDs (110) and the liquid crystal shutter (150) is synchronized with the output of the rotary encoder.

Abstract: An electrophotographic imaging apparatus includes a plurality of photoconductive drums and a plurality of printhead assemblies. Each drum has an axis of rotation and a photoconductive peripheral surface. A plurality of the axes of rotation of the drums lie in a generally common plane. The peripheral surface of each drum rotates in a common direction defining an advance direction of the print medium. Adjacent drums are disposed at a first distance away from each other between the axes of rotation. Each printhead assembly is associated with a respective drum and is configured for generating a laser beam which impinges upon the respective drum along a line of incidence. The printhead assemblies are disposed at a second distance from one to another which is greater than the first distance.

Abstract: An image forming apparatus is provided which includes an image carrying member, a plurality of charging devices for charging the image carrying member, a plurality of laser exposing units for scanning the charged image carrying member with laser beams so as to form latent images at a predetermined position on the image carrying member, a plurality of developing devices for developing the latent images so as to form toner images, and a transfer section for transferring the toner images onto a sheet. The plurality of laser exposing units are vertically arranged and fixed to each other as a single body so that each laser beam of the laser exposing units is parallel to another laser beam with a predetermined interval.

Abstract: A vacuum fluorescent print head (60) for photographic printing paper having luminous elements with phosphorous objects (64, 164) arranged linearly in a main scanning direction to form a plurality of luminous element arrays (90, 190) arranged in a sub-scanning direction at right angles to the main scanning direction. The luminous elements (62, 63, 64; 162, 163, 164) of the luminous element arrays (90; 190) are arranged at predetermined intervals, and the luminous element arrays are arranged relative to one another, such that light beams radiating from the luminous elements of one of the luminous element arrays and from the luminous elements of another of luminous element arrays lie close to one another without overlapping in the sub-scanning direction.

Abstract: An image forming apparatus includes a photosensitive member, an exposure device includes a single-chip light emission element array formed by integrating a plurality of light emitting elements in a single chip which exposure device executes the exposure in the main scanning direction relative to the movement of the photosensitive member, by the light emission from the single-chip light emission element array, and a developing device provided around the photosensitive member.

Abstract: An optical printer apparatus exposes a sensitized sheet (500) to light from a light source (110), which is movable relatively to the sensitized sheet (500), with given timing in accordance with image data composed of pixels having a plurality of gradations that are linearly changeable from a minimum gradation of low color density to a maximum gradation of high color density. The distance for the exposure is adjusted for area gradation, whereby a gradated image is formed on the sensitized sheet (500). Further, change of the exposure distance, compared to change of the gradation, is not uniform throughout the range, and a non-linear relation is established between the changes.

Abstract: A vacuum fluorescent color print head for photographic printing paper having a red luminous block (32) including a plurality of luminous elements arranged in a main scanning direction, and red color filters attached to light-emitting ends of the luminous elements; a green luminous block (33) including a plurality of luminous elements arranged in the main scanning direction, and green color filters attached to light-emitting ends of the luminous elements, and a blue luminous block (34) including a plurality of luminous elements arranged in the main scanning direction, and blue color filters attached to light-emitting ends of the luminous elements. The color filters (69: 69a, 69b, 69c) are attached to the light-emitting ends of the luminous elements defined by phosphorous object (64) formed of ZnO:Zn phosphor, and part of a first strip-like anode conductor (62) or a second strip-like anode conductor (63).

Abstract: A printer has a printer body, a carriage for undergoing scanning movement over a print paper in a scanning direction, and a cassette removably connected to the printer body for storing print paper and having a code element indicative of photosensitive characteristics of the print paper. The print paper contains photosensitive microcapsules encapsulating a color developing material and a photo-curing material and has an image receiving layer for developing color by a reaction of the color developing material with the image receiving layer. The carriage has a light emitting element for emitting light of a preselected wavelength to which the photosensitive microcapsules are exposed to thereby form a latent image on the print paper. A photosensitive characteristics identifying mechanism is disposed on the carriage for reading the code element of the cassette to identify the photosensitive characteristics of the print paper.

Abstract: A vacuum fluorescent printer including a print head (60) having luminous blocks (32, 33, 34) each having a plurality of luminous elements arranged in a main scanning direction for irradiating a photosensitive material with light released from phosphorous objects to which electrons are applied based on a drive signal, thereby forming dots on the photosensitive material. A further luminous block (32b) is provided which is spaced from the luminous blocks (32a, 33, 34) in the sub-scanning direction and used for printing a particular color among the three colors (R, G, B) Each dot of the particular color is formed by light from a plurality of luminous blocks (32a, 32b). A printer controller (7c) is provided for generating a pulsed drive signal as the drive signal. The number of pulses in the drive signal is determined based on a density value of the image data, and the slower a moving speed is in the sub-scanning direction, to the larger pulse width the drive signal is set.

Abstract: An exposure apparatus is set to each color so that latent-image lines formed on photosensitive drums 1a to 1d have predetermined inclinations from rotation axes of the photosensitive drums 1a to 1d to form electrostatic latent images on the photosensitive drums 1a to 1d while performing curve correction on the photosensitive drums 1a to 1d. Peripheral speeds of the photosensitive drums 1a to 1d are controlled so that inclinations of toner images of a plurality of colors on an intermediate transfer belt become equal to each other. Thereby, each pixel is not shifted when light-scanning images are superimposed each other by the exposure apparatus 3 and it is possible to obtain a high-quality image free from image deterioration due to scanning irregularity caused by inclination shifts of scanning lines 3K, 3C, 3M, and 3Y.

Abstract: An image forming apparatus includes an image carrier, a laser diode for generating a plurality of light beams, and a rotating polygonal mirror for simultaneously scanning the image carrier in a primary scanning direction along respective lines which are parallel to each other in a secondary scanning direction. The image carrier is scanned once for each of a plurality of different colors to thereby form a color image on the image carrier. A photosensitive sensor is provided for detecting an amount of deviation of the plurality of light beams in the primary scanning direction with respect to a first color of the plurality of different colors, and deviations among the plurality of light beams in connection with scanning for each of the plurality of different colors are corrected according to the detected amount of deviation with respect to the first color of the plurality of different colors.

Abstract: In a color image recording apparatus provided with plural print heads and a conveyor, each print head includes a plurality of recording elements aligned along at least a single line in a primary scanning direction and the plural print heads are arranged in parallel to each other in the primary scanning direction so that plural component images of the color image are formed parallel respectively by the plural print heads. A reference component image forming device controls the plural pieces of print heads so as to form and superimpose plural reference component images based on the reference component image data and timing setting values. A timing correcting unit analyzes positional deviations in the secondary scanning direction among the plural superimposed reference component images and corrects the timing setting values on the basis of the positional deviations in the secondary scanning direction.

Abstract: A printer head capable of increasing intensity of dot-like light irradiated onto a record medium without requiring to increase a drive voltage or the number of printer heads arranged. The optical printer head includes a luminous element including two luminous dot arrays arranged in parallel to each other at a predetermined interval in a sub-scanning direction. The luminous dot arrays each are constituted of a plurality of luminous dots which have a dimension in the sub-scanning direction increased by a predetermined magnification as compared with that in a main scanning direction and are spaced from each other at identical intervals in the main scanning direction. The luminous dots of the two luminous dot arrays are arranged in an offset manner while being deviated from each other in the main scanning direction by a distance equal to the dimension thereof in the main scanning direction.

Abstract: A color electrophotographic apparatus which can achieve full color image reproduction with one-pass developing is disclosed. According to the present invention, a flexible photoconductor is formed as an endless belt driven by a set of rollers. Developers of various colors are projected onto a surface of the photoconductor from a plurality of developing units. After the projection of the color developers is achieved, the resultant full color toner image is transferred to a recording medium. The toner image is then fused onto the recording medium, thereby reproducing the full color image. The flexible photoconductor is arranged to have a planar surface between the two rollers, with the four optical exposure units positioned to direct four parallel beams of light in a direction perpendicular to the planar printing surface of the photoconductor.

Abstract: In conventional color digital copy machines, when copying in color mode, the polygon mirror of the laser beam scanner for black, which is driven at a higher speed than those of the other colors, is switched to a slower speed in conformity with the speed of the polygon mirrors for the other colors. However, a drawback of this structure is that, especially when switching from monochrome to color mode, the time required to obtain the first copy is lengthened, and the operating efficiency of copying is poor. In the present invention, when copying in color mode, the rotation speed of the polygon mirror of the laser scanner unit for black is not changed at all, but, by skipping certain mirror surfaces of the polygon mirror, and/or by skipping certain of a plurality of laser light sources, the scanning density of the laser scanner unit for black can be brought into conformity with that of the laser scanner units for the other colors.

Abstract: A laser beam display includes at least a first and second plurality of laser beam sources, each of which may preferably be an array of semiconductor lasers, providing a plurality of laser beams in an optical path so as to reflect off of reflective facets of a movable reflector and illuminate a display screen. In a color display, each column of the laser array corresponds to a separate primary color. The separate rows of each array correspond to independently activated but simultaneously driven scan lines to be illuminated by the laser beam scanning apparatus. The plural laser beam arrays subdivide the width of the screen into smaller scan segments to increase the scanning angle or increase the horizontal scanning speed of the apparatus. Tilted facets illuminate different vertical sections of the screen with the laser beams as the reflector rotates. A scan format employing simultaneously illuminated diagonal scan tiles provides optimal use of the plural laser beam arrays.

Abstract: A rotational shaft of a photosensitive drum is connected to a rotational shaft of a stepping motor by a coupling, so that the stepping motor directly drives the photosensitive drum. Here, &thgr; (°) indicating a step angle of the stepping motor, p (mm) indicating a distance between scanning lines on the photosensitive drum, &pgr; indicating the circular constant, and d (mm) indicating a diameter of the photosensitive drum are set so as to satisfy an equation n·&thgr;=(360·p)/(&pgr;·d) to make an optical unit scan the photosensitive drum by one scanning line every time the photosensitive drum is made to rotate n steps, n being a positive integer.

Abstract: An image exposure apparatus which can prevent occurrence of color displacement at a low cost is structured to comprise at least three kinds of light sources each of which emits a light of a different wavelength, deflecting device which deflects at least three kinds of emitted light emitted by the light sources in a predetermined scanning direction, a scanning lens which is disposed so that the at least three kinds of emitted light deflected by the deflecting device can be transmitted therethrough and which allows each chromatic aberration of two kinds of emitted light from among the at least three kinds of emitted light to have substantially the same characteristics, clock generating device for generating a scanning clock for the two kinds of emitted light and a scanning clock for emitted light other than the two kinds of emitted light, each frequency of the scanning clocks being determined in advance so that the two kinds of emitted light and the emitted light other than the two kinds of emitted light have s

Abstract: A conventional image forming device having a plurality of image optical scanning recording sections has had a drawback of being incapable of correcting printing positions of the image optical scanning recording sections with high precision by using a small-scale circuit. In the case of an image forming device of the present invention, a variable clock generator 114 having a voltage control oscillator (VCO) 114a is provided therein as reference clock signal generating means of laser control system of each of image optical scanning recording sections (LSU) for cyan, yellow, and magenta. By so doing, during an invalid printing period prior to a valid printing period, frequencies of the reference clock signals of the LSUs for cyan, yellow, and magenta are adjusted in accordance with offsets of printing start positions of these LSUs with respect to that of the LSU for black, so that printing offsets are eliminated.

Abstract: A digital photograph printer comprising a transport mechanism, a modulated light source (1206), and an exposure controller (1302). The transport mechanism for advancing a photosensitive medium (1202) through an exposure region (1200) such that said photosensitive medium advances one row of pixel locations each row period. The modulated light source (1206) is operable to selectively provide a beam of light to an array of individually modulated regions (1300, 1306, 1310) in an exposure region (1200). As the photosensitive medium (1202) moves through the exposure region (1200) the individually modulated regions in the exposure region (1200) have the opportunity to expose each pixel locations in the exposure region (1200) once each row period. The exposure controller (1302) operable to control the modulated light source (1206) based on image data provided to modulated light source.

Abstract: As the speed of a photoconductor drum 1a can be independently varied by providing a rotational speed adjustment mechanism to the photoconductor drum 1a, an inclined angle in a diagonal direction can be varied and as a result, misregistration can be adjusted. Also, exposure device with the inclination of a scanning line with the photoconductor drum 1a provided and control over correcting the inclination of the scanning line on the photoconductor drum 1a is executed by control over varying the peripheral speed of the photoconductor drum 1a. Hereby, a multiple image formation device wherein the configuration of color misregistration correction device is simplified is provided as an image formation device used for the output device of a computer and others.

Abstract: The present invention is a method and apparatus for modifying line synchronization signals that drive at least one secondary image exposure device in a multicolor printing or reprographic system. The ability to alter the line synchronization signals enables the accurate registration of a multiple color images on a photoconductor in response to detected photoreceptor motion. More specifically, the first color image is deposited on the photoreceptor using a servomotor control system to control photoreceptor velocity as a function of the desired raster line spacing, or the frequency at which the individual raster lines are deposited. All subsequently added colors in the single-pass printing system are added under the control of phase-locked loops, wherein the line synchronization pulses are produced as a function of the photoreceptor speed, to correct for variations from the nominal photoreceptor velocity.

Abstract: An electrostatographic development system includes a multicolor array; a photoreceptor having a plurality of layers, each layer being sensitive or accessible only to one of multiple wavelengths; and electrostatographic development apparatus for exposing areas of the photoreceptor to emitted light from the multicolor printbar, and, after exposure, depositing at least a plurality of toners on the photoreceptor in response to exposure of areas of layers of the photoreceptor to the emitted light. The multicolor array for such an electrostatographic development system includes a plurality of subarrays of light emitting areas arranged across a length of the array, wherein each of the plurality of subarrays includes a plurality of light emitting areas and each of the plurality of subarrays emit light of a different wavelength from the remaining subarrays.