公开(公告)号：EP0428408A3

公开(公告)日：1992-05-13

申请号：EP90312444.4

申请日：1990-11-15

申请人： FUJITSU LIMITED

发明人： Sato, Teruyuki

IPC分类号： H04N1/04

CPC分类号： H04N1/0473 ,  H04N1/12 ,  H04N1/193 ,  H04N2201/0471 ,  H04N2201/04717 ,  H04N2201/04732 ,  H04N2201/04737 ,  H04N2201/04786 ,  H04N2201/04793

摘要： Document reading apparatus, for producing electrical signals representative of information present on a main face of a document, includes feeding means (31), for moving such a document (15) towards a predetermined reading location in the apparatus, and a sensor device (32), disposed at a detecting location upstream of the said reading location, for detecting passage of a leading edge part of the document (15) across the said detecting location towards the said reading location. Optical reading means (11, 12, 13, 14) produce electrical signals representative of such information on that portion of the document (15) which is currently at the said reading location, and control means (21, 22, 23) initiate operation of the reading means upon expiry of a preset delay time after such passage of the said leading edge part across the said detecting location. The apparatus is operable in a calibration mode wherein, when a calibration document (C) bearing predetermined calibration information (3) is fed into the apparatus, such electrical signals derived from the said calibration information (3) are employed by calibration circuitry (21, 23) of the apparatus to measure displacement of the said leading edge part (4) of the calibration document (C) from the said reading location upon expiry of the said preset delay time. The magnitude of the preset delay time is then modified in dependence upon the measurement result. Such calibration can serve to reduce such displacement of the leading edge part of a document read in a subsequent reading operation.

公开(公告)号：EP0375429A3

公开(公告)日：1992-04-01

申请号：EP89313451.0

申请日：1989-12-21

申请人： XEROX CORPORATION

发明人： Curry, Douglas N.

IPC分类号： G06K15/12

CPC分类号： G06K15/1219 ,  H04N1/0473 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04734 ,  H04N2201/04744 ,  H04N2201/04786 ,  H04N2201/04793 ,  H04N2201/04794

摘要： An arithmetic frequency synthesizer (24) for generating a bit clock frequency for the flying spot scanner of a digital printer includes means for loading a pseudo-random offset value, accm i , into its accumulator at the start of each scan. The offset values for successive scans pseudo-randomly vary within a range 0 ≦ accm i In a printer having a prismatic scanner, a different predetermined pseudo-random offset value is advantageously provided for each facet of the prism (12), whereby the offset value for any given facet can be retrieved from a table look-up memory under the control of a scan counter or the like to be applied to the frequency synthesizer alone or as an initial offset for a polygon signature correction value for the given facet.

公开(公告)号：EP0427506A2

公开(公告)日：1991-05-15

申请号：EP90312127.5

申请日：1990-11-06

申请人： XEROX CORPORATION

发明人： Pepe, Martin J.

IPC分类号： H04N1/047

CPC分类号： H04N1/506 ,  H04N1/0473 ,  H04N1/12 ,  H04N2201/0471 ,  H04N2201/04724 ,  H04N2201/04734 ,  H04N2201/04786

摘要： A line-at-a-time printer is realized by directing a collimated light beam through an interaction area of an electro-optic light modulator (36) while successive sheets of data samples are sequentially applied to electrodes positioned across the width of the modulator. A modulated line latent image is formed on the surface of a photoreceptor (20), the photoreceptor being indexed to create successive exposed, modulated line images on its surface. Electronic registration control of successive images, for example in a color printing process, is achieved by a control system (42) which triggers the light beam source between the time interval during which data signals are loaded into the modulator. In one embodiment the pulse sourcing is accomplished through a feedback loop which includes a sensor for monitoring movement of the photoreceptor and application of the light source pulses and the data samples.

摘要翻译： 线性一次打印机是通过将准直光束引导通过电光调制器（36）的相互作用区域而实现的，同时连续的数据样本片依次施加到跨越调制器宽度的电极。 调制线潜像形成在感光体（20）的表面上，感光体被折射以在其表面上产生连续的曝光的调制线图像。 通过控制系统（42）实现连续图像的电子注册控制，该控制系统在数据信号被加载到调制器中的时间间隔之间触发光束源。 在一个实施例中，通过反馈回路实现脉冲源，该反馈回路包括用于监测感光体的运动和光源脉冲和数据样本的应用的传感器。

公开(公告)号：EP0426128A2

公开(公告)日：1991-05-08

申请号：EP90120832.2

申请日：1990-10-30

申请人： KABUSHIKI KAISHA TOSHIBA

发明人： Matsuoka, Takashi, c/o Intellectual Property Div.

IPC分类号： G06K15/12 ,  H04N1/053

CPC分类号： H04N1/053 ,  G06K15/1219 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04786 ,  H04N2201/04794

摘要： A laser beam emitted from a laser (90) is detected by a photosensor (312) and a flip-flop (370) is preset by a detection signal output from the photosensor (312). A timer (372) is driven in accordance with a preset output from the flip-flop (370) and a timer output is generated after a lapse of a predetermined period of time. The laser (90) is again driven by the timer output to emit a laser beam. While, another timer (376) is driven in response to a front edge of the preset output of the flip-flop (370) to generate a horizontal synchronizing signal (HSYNCO).

摘要翻译： 由激光器（90）发射的激光束由光电传感器（312）检测，触发器（370）由光传感器（312）输出的检测信号预设。 根据触发器（370）的预设输出驱动定时器（372），并且在经过预定时间段之后产生定时器输出。 激光器（90）再次由定时器输出驱动以发射激光束。 而另一个定时器（376）响应于触发器（370）的预置输出的前沿被驱动以产生水平同步信号（HSYNCO）。

公开(公告)号：EP0269450A3

公开(公告)日：1990-04-25

申请号：EP87310466.5

申请日：1987-11-27

申请人： FUJITSU LIMITED

发明人： Houki, Youji

IPC分类号： G02B26/10 ,  G02B27/00 ,  H04N1/04 ,  H04N1/12

CPC分类号： G02B27/0031 ,  G02B26/126 ,  H04N1/053 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04786 ,  H04N2201/04794

摘要： An optical beam scanner comprises: a light source (2); a deviation unit (5) for deviating a beam from the light source and emitting a scanning beam; a compensation unit for compensating a vertical inclination of the deviation unit and comprising a first optical element (10) for deforming the scanning beam into a vertically longitudinal oval shape and a second optical element (11) for reforming the oval beam into a round shape, and converging the scanning beam on a scanning surface (7); and, a detection unit (9, 8) for detecting the scanning beam between the deviation unit (5) and the second optical element (11). The beam deformation can render the detection unit less sensitive to unwanted inclinational changes of the deviation unit.

公开(公告)号：EP0250132A3

公开(公告)日：1989-08-02

申请号：EP87304987.8

申请日：1987-06-05

申请人： KONICA CORPORATION

发明人： Umeda, Toshikazu ,  Funaki, Shinsuke ,  Nozu, Taketo

IPC分类号： H04N1/46

CPC分类号： H04N1/502 ,  H04N1/053 ,  H04N1/1135 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04786 ,  H04N2201/04794

摘要： An image recording apparatus wherein a plurality of laser beams (10 - 12) are scanned on a color photosensitive material (13) by an optical deflecting device (8), the laser beams (10 - 12) are detected by beam detecting devices (1), and record starting timings for the laser beams (10 - 12) are controlled on the basis of detection signals provided by the detecting devices so that respective record positions of the laser beams (10 - 12) are the same.

摘要翻译： 一种图像记录装置，其中通过光学偏转装置（8）在彩色光敏材料（13）上扫描多个激光束（10-12），激光束（10-12）由光束检测装置 ），并且基于由检测装置提供的检测信号来控制激光束（10-12）的记录开始定时，使得激光束（10-12）的相应记录位置相同。

公开(公告)号：EP0268499A2

公开(公告)日：1988-05-25

申请号：EP87310298.2

申请日：1987-11-20

申请人： KONICA CORPORATION

发明人： Maruyama, Hiroyuki ,  Kishimoto, Tadao ,  Isobe, Toshifumi ,  Yokobori, Jun ,  Kaneko, Tadashi ,  Tamura, Akihiko ,  Murahashi, Takashi ,  Takei, Yoshiaki ,  Hatakeyama, Noboru ,  Matsunawa, Masahiko ,  Ichihara, Yoshiyuki

IPC分类号： H04N1/46

CPC分类号： G03G15/0152 ,  G03G15/0163 ,  H04N1/0473 ,  H04N1/1135 ,  H04N1/12 ,  H04N1/508 ,  H04N2201/0471 ,  H04N2201/04724 ,  H04N2201/04732 ,  H04N2201/04786 ,  Y10S347/90

摘要： A color image forming apparatus wherein a color image is formed by rotating plural times an image retainer (61) and repeating a latent image formation and a development. The start timing of an image forming cycle is controlled by using one of reference signals corresponding to one of a plurality of predetermined positions on the image retainer (61) and the start timing of another image forming cycle is controlled by using another of the reference signal.

摘要翻译： 彩色图像形成装置，其中通过使图像保持器（61）旋转多次并重复潜像形成和显影来形成彩色图像。 通过使用与图像保持器（61）上的多个预定位置中的一个相对应的参考信号之一来控制图像形成周期的开始定时，并且通过使用另一图像形成循环的另一个参考信号来控制另一图像形成周期的开始定时 。

公开(公告)号：EP0091296A1

公开(公告)日：1983-10-12

申请号：EP83301859.1

申请日：1983-03-31

申请人： PITNEY BOWES, INC.

发明人： Dolan, Donald T. ,  Stalzer, Henry

IPC分类号： B41J2/435

CPC分类号： B41J11/42 ,  G06K15/1247 ,  H04N1/0473 ,  H04N1/12 ,  H04N1/193 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04724 ,  H04N2201/04734 ,  H04N2201/04786 ,  H04N2201/04794 ,  Y10S347/90

摘要： A non-impact printer in which a source of image information (36) such as a computer, facsimile machine, word processor or the like provides image information to an image transfer device (38) which transfers the image to a moving image receiving surface (14) for printing of the image as hard copy. A motion encoder (20) senses the motion of the image receiving surface (14) and creates a digital timing signal representative of the motion. A logic circuit (32) selectively delays the input of the image information signal to the image transfer device (38) in response to digital timing signal to synchronize motion of the image receiving surface (14) with transfer of the image to the image receiving surface (14).

公开(公告)号：EP0062479A2

公开(公告)日：1982-10-13

申请号：EP82301660.5

申请日：1982-03-30

申请人： XEROX CORPORATION

发明人： Grant, Matteson Ronald

IPC分类号： H04N1/04

CPC分类号： H04N1/32448 ,  H04N1/0473 ,  H04N1/12 ,  H04N1/193 ,  H04N1/32358 ,  H04N2201/0081 ,  H04N2201/0082 ,  H04N2201/0086 ,  H04N2201/0087 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04725 ,  H04N2201/04734 ,  H04N2201/04756 ,  H04N2201/04786 ,  H04N2201/04794 ,  H04N2201/3294

摘要： A raster scanner includes a scanning module (12) which comprises a linear scanning array, a scanning slit permitting the array to view a document image one line at a time, and document transport for transporting documents past the scanning slit. To accommodate the disparity between scanning rates and user data rates, a relatively small buffer (14) stores lines of pixels output by the array pending demand by an output device (16). Intermittent operation of the scanner in response to buffer pixel demands is effected through starting and stopping of the document transport. A control (15, 45) is provided to prevent uneven spacing of scan lines resulting from scanning stopped documents or documents in the process of being accelerated or decelerated to and from scanning speed by the document transport.

公开(公告)号：EP1009157B1

公开(公告)日：2013-06-12

申请号：EP99309779.9

申请日：1999-12-06

申请人： Xerox Corporation

发明人： Nowak, William J. ,  Appel, James J. ,  Bock, Edward C.

IPC分类号： H04N1/047 ,  H04N1/50

CPC分类号： H04N1/1135 ,  H04N1/047 ,  H04N1/12 ,  H04N1/506 ,  H04N2201/02439 ,  H04N2201/03154 ,  H04N2201/0471 ,  H04N2201/04722 ,  H04N2201/04729 ,  H04N2201/04731 ,  H04N2201/04734 ,  H04N2201/04739 ,  H04N2201/04744 ,  H04N2201/0476 ,  H04N2201/04763 ,  H04N2201/04786 ,  H04N2201/04789 ,  H04N2201/04791 ,  H04N2201/04794

摘要： Electrophotographic printers have raster output scanners (27) that correct for polygon facet (126) phasing errors and photoreceptor (10) position errors by aerial scan line adjustments. A photoreceptor position sensor senses the position of the photoreceptor (10) and a facet position sensor (137) senses the position of the polygon facets. A scan line position controller (119) produces a position signal that depends upon the photoreceptor position sensor and the facet position sensor (137). A piezoelectric-actuated lens mover assembly (118) receives the position signal and moves a pre-polygon lens (116) to adjust the scan line plane to correct for any misregistration. The piezoelectric-actuated lens mover assembly (118) includes a large displacement piezoelectric element and a flexible arm assembly (210) that holds the pre-polygon lens (116).