公开(公告)号：US06529222B1

公开(公告)日：2003-03-04

申请号：US09431258

申请日：1999-11-01

Applicant: Seung-deog An

Inventor： Seung-deog An

IPC: B41J2385

CPC classification number: H04N1/053 ,  G02B26/127 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04732 ,  H04N2201/04741 ,  H04N2201/04744 ,  H04N2201/04786 ,  H04N2201/04794

Abstract: An optical scanning system for a printer. The optical scanning system includes: an optical scanning unit installed to scan light onto a circulating photoreceptor web; a photodetector installed for receiving scanning light emitted from the optical scanning unit; a defective edge area detector for comparing pulse signals output in sequence from the photodetector to determine whether the edge of the photoreceptor web has a defect, and outputting an edge defect signal if a defective area is detected; an estimated pulse width calculator for outputting a predetermined estimated pulse width, and updating the estimated pulse width for the next line image scanning using the signal from the defective edge area detector, the predetermined estimated pulse width, and the pulse signal from the photodetector; a line scanning synchronous signal generator for generating a line scanning synchronous signal in synchronicity with the predetermined estimated pulse width; and an optical scanning unit driver for driving the optical scanning unit such that the optical scanning unit emits image information light onto the photoreceptor web synchronized with the line scanning synchronous signal. By the optical scanning system and a method for adjusting the start point of image scanning, errors in writing an image can be suppressed, which are caused by defects at the edge of the photoreceptor web.

Abstract translation: 一种用于打印机的光学扫描系统。 光学扫描系统包括：光学扫描单元，被安装成将光扫描到循环感光体网上; 安装用于接收从光学扫描单元发射的扫描光的光电检测器; 用于比较从光电检测器顺序输出的脉冲信号以确定感光体网的边缘是否具有缺陷的缺陷边缘区域检测器，以及如果检测到缺陷区域则输出边缘缺陷信号; 用于输出预定的估计脉冲宽度的估计脉冲宽度计算器，以及使用来自缺陷边缘区域检测器的信号，预定估计脉冲宽度和来自光电检测器的脉冲信号来更新用于下一行图像扫描的估计脉冲宽度; 线扫描同步信号发生器，用于与预定的估计脉冲宽度同步地产生行扫描同步信号; 以及用于驱动光学扫描单元的光学扫描单元驱动器，使得光学扫描单元将图像信息光发射到与行扫描同步信号同步的感光体网上。 通过光学扫描系统和调整图像扫描起点的方法，可以抑制由感光体网边缘的缺陷引起的图像写入误差。

公开(公告)号：US06527182B1

公开(公告)日：2003-03-04

申请号：US09560353

申请日：2000-04-28

Applicant: Hirotaka Chiba ,  Tsugio Noda

Inventor： Hirotaka Chiba ,  Tsugio Noda

IPC: G06K710

CPC classification number: H04N1/3263 ,  H04N1/047 ,  H04N1/107 ,  H04N1/32678 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04724 ,  H04N2201/04734 ,  H04N2201/04787 ,  H04N2201/04794

Abstract: An image reading apparatus comprises an image reading section which optically reads one line of an image on a paper at a specific time interval and inputs the acquired image data to an image signal processing section which converts the image data into a binary image data. An amount of movement detection section is provided which outputs a signal to an image data generation section when the image reading section moves by one line. When such a signal is received more than one time during one time interval, the image data generation section generates a binary image data corresponding to the number of lines whose data is not available from the binary image data for a line acquired during that time interval.

Abstract translation: 图像读取装置包括图像读取部，其以特定时间间隔光学地读取纸张上的一行图像，并将获取的图像数据输入到将图像数据转换为二值图像数据的图像信号处理部。 提供了一种移动量检测部分，当图像读取部分移动一行时，其将信号输出到图像数据生成部分。 当在一个时间间隔期间接收到这样的信号多于一次时，图像数据生成部分生成对应于在该时间间隔期间获取的线的二进制图像数据的数据不可用的行数的二进制图像数据。

公开(公告)号：US20030030686A1

公开(公告)日：2003-02-13

申请号：US10247294

申请日：2002-09-20

Applicant: Canon Kabushiki Kaisha

Inventor： Junkichi Abe ,  Hiroyuki Miyake

IPC: B41J029/38

CPC classification number: B41J15/165 ,  B41J3/4078 ,  G06K15/02 ,  H04N1/047 ,  H04N1/12 ,  H04N1/128 ,  H04N1/1911 ,  H04N2201/02439 ,  H04N2201/0468 ,  H04N2201/0471 ,  H04N2201/04717 ,  H04N2201/04734 ,  H04N2201/04739 ,  H04N2201/04787 ,  H04N2201/04794

Abstract: The invention provides an image forming method and apparatus capable of forming an image with a desired shape at a correct position on a recording medium having expansion and contraction properties. Boundary lines formed on the recording medium being conveyed are detected by a sensor. Distortion of the recording medium is evaluated on the basis of the detected boundary lines. Image data is corrected in accordance with the result of the evaluation and an image is formed in accordance with the corrected image data. In the above process, image data within the respective areas surrounded by the boundary lines is deformed such that the image is printed at a correct location even when the recording medium has distortion due to expansion/contraction.

公开(公告)号：US06512605B1

公开(公告)日：2003-01-28

申请号：US09365721

申请日：1999-08-03

Applicant: Tatsumi Watanabe ,  Yasuhiro Kuwahara ,  Akio Kojima

Inventor： Tatsumi Watanabe ,  Yasuhiro Kuwahara ,  Akio Kojima

IPC: H04N146

CPC classification number: H04N1/486 ,  H04N1/0473 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04743 ,  H04N2201/04787 ,  H04N2201/04793 ,  H04N2201/04794

Abstract: An inexpensive image reading apparatus which does not need a delay buffer and which permits image inputting with an image sensor array with reduced color dislocation on character edge etc. Color images are inputted in this process: Line reading circuit 102 reads three color data simultaneously. On the basis of the top and end points of a line of green data obtained by encoders and scanned position detection circuit, offset size deriving circuit 107 works out the top and end scanned positions for the data on the other colors, that is, red and blue. From the top to the end scanned positions for the respective colors, the mapping coordinates deriving circuit 108 works out the coordinates of the picture elements for the read color data. Mapping circuit 109 maps the respective color data on the image memory 110 at the positions corresponding to the coordinates obtained by the mapping coordinates deriving circuit 108.

Abstract translation: 不需要延迟缓冲器的便宜的图像读取装置，其允许使用字符边缘等处具有减少的颜色位错的图像传感器阵列进行图像输入。在该处理中输入彩色图像：行读取电路102同时读取三个颜色数据。 基于由编码器和扫描位置检测电路获得的一行绿色数据的顶点和终点，偏移尺寸导出电路107对于其他颜色的数据的顶部和末端扫描位置，即红色和 蓝色。 从相应颜色的上到下扫描位置，映射坐标导出电路108对读出的颜色数据的图像元素的坐标进行计算。 映射电路109将对应于由映射坐标导出电路108获得的坐标的位置映射到图像存储器110上的各个颜色数据。

公开(公告)号：US06493019B1

公开(公告)日：2002-12-10

申请号：US09489945

申请日：2000-01-24

Applicant: Hideaki Hirasawa

Inventor： Hideaki Hirasawa

IPC: B41J247

CPC classification number: H04N1/053 ,  H04N1/1135 ,  H04N1/12 ,  H04N1/1911 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04722 ,  H04N2201/04729 ,  H04N2201/04731 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04781 ,  H04N2201/04794

Abstract: An image forming apparatus, includes an image forming unit including an image bearing member, a beam generating unit for generating a plurality of light beams and an optical scan system for scanning the image bearing member with the plurality of light beams to write an image, a beam detecting unit for detecting the plurality of light beams scanning the image bearing member at predetermined positions and obtaining a plurality of beam detection signals, a clock generating unit for generating a single clock signal, a controller for controlling the frequency of the single clock signal and a synchronization circuit for controlling the phase of the single clock signal in accordance with the plurality of beam detection signals obtained by the beam detecting unit, and generating a plurality of control clocks, wherein the plurality of beams are generated in accordance with the plurality of control clocks.

Abstract translation: 一种图像形成装置，包括：图像形成单元，包括图像承载部件;用于产生多个光束的光束产生单元;以及用于利用多个光束扫描图像承载部件以写入图像的光学扫描系统; 光束检测单元，用于检测在预定位置扫描图像承载部件的多个光束并获得多个光束检测信号;时钟产生单元，用于产生单个时钟信号;控制器，用于控制单个时钟信号的频率;以及 同步电路，用于根据由波束检测单元获得的多个波束检测信号来控制单个时钟信号的相位，并产生多个控制时钟，其中根据多个控制产生多个波束 时钟。

公开(公告)号：US06480221B1

公开(公告)日：2002-11-12

申请号：US09567992

申请日：2000-05-10

Applicant: Mark Edwin Kirtley Lund ,  Daniel Eugene Pawley ,  Earl Dawson Ward, II

Inventor： Mark Edwin Kirtley Lund ,  Daniel Eugene Pawley ,  Earl Dawson Ward, II

IPC: B41J2435

CPC classification number: G06K15/1219 ,  B41J2/442 ,  H04N1/047 ,  H04N2201/0471 ,  H04N2201/04712 ,  H04N2201/04729 ,  H04N2201/04731 ,  H04N2201/04732 ,  H04N2201/04734 ,  H04N2201/04744 ,  H04N2201/04749

Abstract: A method of determining a position of a laser beam in an electrophotographic machine includes providing a sensor device having a laser beam receiving surface with a first edge and a second edge. The second edge is nonparallel to the first edge. The laser beam is scanned across the receiving surface in a scan direction perpendicular to a process direction. The laser beam intersects each of the first edge and the second edge of the receiving surface during the scanning. A time period between when the laser beam intersects the first edge and when the laser beam intersects the second edge of the receiving surface is measured. A process position of the laser beam along the process direction is calculated based upon the measured time period.

Abstract translation: 确定电子照相机中的激光束的位置的方法包括提供具有带有第一边缘和第二边缘的激光束接收表面的传感器装置。 第二边缘与第一边缘不平行。 激光束沿垂直于过程方向的扫描方向扫描接收表面。 激光束在扫描期间与接收表面的第一边缘和第二边缘中的每一个相交。 测量当激光束与第一边缘相交并且当激光束与接收表面的第二边缘相交时的时间段。 基于测量的时间周期计算激光束沿着处理方向的处理位置。

公开(公告)号：US20020154204A1

公开(公告)日：2002-10-24

申请号：US10171682

申请日：2002-06-17

Applicant: TOSHIBA TEC KABUSHIKI KAISHA

Inventor： Koji Tanimoto ,  Kenichi Komiya ,  Jun Sakakibara ,  Koji Kawai

IPC: G03G015/01 ,  G03G015/04

CPC classification number: H04N1/233 ,  G03G2215/0119 ,  H04N1/1135 ,  H04N1/12 ,  H04N1/2369 ,  H04N1/295 ,  H04N1/506 ,  H04N2201/0471 ,  H04N2201/04729 ,  H04N2201/04744 ,  H04N2201/33378

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. Sensors for detecting scanning light beam obtains the center of light beam in accordance with information on a point at which the sensors start to respond and another point at which they cease responding, for performing several types of control based on the positional information, which provides correct information even though the size or power is different over sevral light beam.

Abstract translation: 图像形成装置保持恒定的光束扫描状态，使得一旦通过控制彩色图像形成中的颜色配准获得期望的颜色重叠精度，光束将始终处于相同的状态。 这种机制实现了不间断地形成测试图案多次或不必要地消耗调色剂的颜色重叠。 光束通过开关设置在激光扫描系统中。 设置在每个感光鼓附近的传感器确定每个光束是否扫描没有倾斜或某个扫描区域的某个部分，或者每个图像放大是否提供期望的尺寸。 用于检测扫描光束的传感器根据关于传感器开始响应的点的信息和其停止响应的另一个点获得光束中心，用于基于提供正确的位置信息执行几种类型的控制 信息即使大小或功率不同于三光束。

公开(公告)号：US06459520B1

公开(公告)日：2002-10-01

申请号：US09349111

申请日：1999-07-08

Applicant: Hidemi Takayama

Inventor： Hidemi Takayama

IPC: G02B2608

CPC classification number: H04N1/00015 ,  B41J2/471 ,  G02B26/123 ,  G06K15/1219 ,  G06K15/1261 ,  H04N1/00034 ,  H04N1/00037 ,  H04N1/0005 ,  H04N1/00082 ,  H04N1/053 ,  H04N1/1135 ,  H04N1/12 ,  H04N1/1911 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04762 ,  H04N2201/04794

Abstract: An optical scanning apparatus includes a light source having a plurality of light-emitting portions arranged as inclined with respect to a main scanning direction, a deflector for deflecting a plurality of light beams emitted from the light source, an imaging system for guiding the plurality of light beams deflected and reflected by the deflector, onto a scanned surface, a detector arranged substantially at the same position as the scanned surface and in a normal direction to the main scanning direction. The detector detects scanning positions of the plurality of light beams and a difference between pass times of the plurality of light beams to thereby detect deviation of the scanning positions and variation of magnification of the optical scanning apparatus. A correcting device is provided for correcting drawing positions of the plurality of light beams on the scanned surface, based on the result of detection by the detector.

Abstract translation: 一种光学扫描装置，包括具有相对于主扫描方向倾斜配置的多个发光部的光源，用于使从所述光源射出的多个光束偏转的偏转器，将所述多个 由偏转器偏转和反射的光束到扫描表面上，检测器基本上布置在与扫描表面相同的位置并且沿着与主扫描方向正交的方向。 检测器检测多个光束的扫描位置和多个光束的通过时间之间的差异，从而检测扫描位置的偏差和光学扫描装置的放大率的变化。 基于检测器的检测结果，提供校正装置，用于校正扫描表面上的多个光束的绘制位置。

公开(公告)号：US06456309B1

公开(公告)日：2002-09-24

申请号：US09626465

申请日：2000-07-26

Applicant: Elias Panides ,  Joannes N. M. deJong ,  Lloyd A. Williams ,  Vittorio Castelli ,  Barry M. Wolf

Inventor： Elias Panides ,  Joannes N. M. deJong ,  Lloyd A. Williams ,  Vittorio Castelli ,  Barry M. Wolf

IPC: B41J2385

CPC classification number: G03G15/5008 ,  G03G15/0152 ,  G03G15/0163 ,  G03G2215/0158 ,  G03G2215/017 ,  H04N1/0473 ,  H04N1/1135 ,  H04N2201/0471 ,  H04N2201/04722 ,  H04N2201/04732 ,  H04N2201/04734 ,  H04N2201/04744 ,  H04N2201/04756

Abstract: Color electrophotographic printers having latent image positions synchronized with start-of-scan signals. A laser source projects a laser beam onto a multifaceted rotating polygon that sweeps that beam in a scan line across a moving photoreceptor. A start-of-scan detector produces start-of-scan signals when the laser beam is in position to write a scan line. A belt sensor produces belt signals when indicia on the photoreceptor passes a reference position. A controller receives the belt signals and the start-of-scan and then adjusts the photoreceptors rotational velocity such that the belt signals are an integral multiple of the start-of-scan signals. To reduce the impact of drive roller eccentricities on belt signal to start-of-scan signal timing, the perimeters of photoreceptor roller elements are sub-multiples of the photoreceptor length.

Abstract translation: 具有与扫描开始信号同步的潜像位置的彩色电子照相打印机。 激光源将激光束投射到多面旋转的多边形上，该扫描线在扫描线上扫过运动的感光体。 当激光束处于写入扫描线的位置时，扫描扫描检测器产生扫描开始信号。 当感光体上的标记通过参考位置时，带传感器产生带信号。 控制器接收皮带信号和扫描开始，然后调节光感受器的旋转速度，使得皮带信号是扫描扫描信号的整数倍。 为了减小驱动辊偏心对皮带信号对起始扫描信号定时的影响，感光鼓元件的周长是感光体长度的次倍数。

公开(公告)号：US20020131138A1

公开(公告)日：2002-09-19

申请号：US10142172

申请日：2002-05-10

Inventor： Hyeong-Seog Shim

IPC: G02B026/08

CPC classification number: H04N1/047 ,  B41J2/471 ,  G02B26/125 ,  H04N1/1135 ,  H04N2201/0471 ,  H04N2201/04713 ,  H04N2201/04744

Abstract: A laser scanning unit disclosed in the present invention is intended to form an image on a photo-sensitive drum by generating laser beams in a facsimile unit, a copying machine and a printer using laser beams. The laser scanning unit includes a collimated lens reforming the laser beams emitted from a laser diode into parallel beams, a polygon mirror scanning by deflecting the above laser beams in constant velocity, a f-theta lens for adjusting a focus on a scanning plane by polarizing the laser beams to a main scanning direction and correcting an aberration, a reflecting surface attached with a reflecting film reflecting said laser beams into a horizontal direction, an optical sensor receiving the laser beams reflected from said reflecting film and a base plate for supporting said optical sensor and reflecting surface. According to the present invention, it is not needed an additional component such as the conventional plate spring and reflecting mirror, by using the reflecting film attached to the reflecting surface projected on a base plate instead of a horizontal synchronous mirror, in order to reflect the laser beams with the optical sensor. Accordingly, the present invention can reduce the fabrication cost of a product.

Abstract translation: 在本发明中公开的激光扫描单元旨在通过在传真单元，复印机和使用激光束的打印机中产生激光束来在感光鼓上形成图像。 激光扫描单元包括将从激光二极管发射的激光束重构为平行光束的准直透镜，通过以恒定速度偏转上述激光束的多面镜扫描，用于通过偏光调节扫描平面上的焦点的f-theta透镜 激光束到主扫描方向并校正像差，反射表面附接有反射所述激光束到水平方向的反射膜，接收从所述反射膜反射的激光束的光学传感器和用于支撑所述光学器件的基板 传感器和反射面。 根据本发明，通过使用安装在投影在基板上的反射面而不是水平同步反射镜的反射膜，不需要诸如常规板簧和反射镜的附加部件，以便反射 激光束与光学传感器。 因此，本发明可以降低产品的制造成本。