公开(公告)号：US20020125416A1

公开(公告)日：2002-09-12

申请号：US10091403

申请日：2002-03-07

Inventor： Yoshiharu Niito

IPC: H01J005/16 ,  H01J003/14

CPC classification number: H04N1/047 ,  H04N1/1135 ,  H04N2201/0471 ,  H04N2201/04784

Abstract: An image forming apparatus includes a light source, a light beam controlling mechanism, a sensor, and a signal controller. The light source emits parallel light beams with an angle smaller than 90null relative to a sub-scanning direction. The light beam controlling mechanism controls a scanning of the light beams. The sensor detects one of the light beams and generates a line synchronous signal. The signal controller delays the data streams and generates PLL clock signals divided into different clock signals having a same frequency and having phases sequentially varied. The signal controller selects one of the different clock signals and drives the light source with the selected clock signal.

Abstract translation: 图像形成装置包括光源，光束控制机构，传感器和信号控制器。 光源相对于副扫描方向发射角度小于90°的平行光束。 光束控制机构控制光束的扫描。 传感器检测光束之一并产生线路同步信号。 信号控制器延迟数据流并产生被分成具有相同频率的不同时钟信号并具有顺序变化的相位的PLL时钟信号。 信号控制器选择不同的时钟信号之一，并用所选择的时钟信号驱动光源。

公开(公告)号：US20020121593A1

公开(公告)日：2002-09-05

申请号：US10085583

申请日：2002-03-01

Inventor： Junshin Sakamoto

IPC: H01J003/14 ,  H01J005/16

CPC classification number: G02B26/123 ,  G02B26/127 ,  H04N1/053 ,  H04N1/1135 ,  H04N1/12 ,  H04N1/1911 ,  H04N1/1916 ,  H04N1/1918 ,  H04N2201/0471 ,  H04N2201/04713 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04749

Abstract: A two-dimensional beam writing position detecting device for providing an optical system for scanning on a photoconductor by laser beams emitted from a semiconductor laser to form an electrostatic latent image and arranging a plurality of the laser beams in two dimensions and slantingly scanning each the laser beam for forming the electrostatic latent image on the photoconductor at a predetermined angle and detecting the laser beams for determining the first writing position on the photoconductor of the laser beams is characterized in that a longitudinal direction of a beam light receiving surface of the detecting device 1 inclines at the substantially same angle as the slant scanning angle with respect to the perpendicular of a scanning direction of the plural beams.

Abstract translation: 一种二维光束写入位置检测装置，用于提供光学系统，用于通过从半导体激光器发射的激光束在光电导体上扫描以形成静电潜像，并且在两个维度上布置多个激光束并且倾斜扫描每个激光器 用于以预定角度在感光体上形成静电潜像并检测用于确定激光束的感光体上的第一写入位置的激光束的光束的特征在于，检测装置1的光束受光面的纵向方向 相对于多个光束的扫描方向的垂直方向以与倾斜扫描角度大致相同的角度倾斜。

公开(公告)号：US20020101502A1

公开(公告)日：2002-08-01

申请号：US10094974

申请日：2002-03-12

Applicant: FUJI PHOTO FILM CO., LTD.

Inventor： Atsushi Suganuma

IPC: B41J002/435 ,  B41J002/47

CPC classification number: H04N1/0678 ,  B41J19/202 ,  H04N1/047 ,  H04N1/06 ,  H04N2201/02443 ,  H04N2201/03108 ,  H04N2201/0471 ,  H04N2201/04724 ,  H04N2201/04729 ,  H04N2201/04731 ,  H04N2201/04732 ,  H04N2201/04734 ,  H04N2201/04739 ,  H04N2201/04756 ,  H04N2201/04772 ,  H04N2201/04789 ,  H04N2201/04798

Abstract: An image is accurately recorded by a light beam on a PS plate wound on a drum which is rotating at a constant speed. A rotary encoder detects information of a recording position in a main scanning direction by the light beam that is emitted from an optical unit to the PS plate. Based on the detected information, a PLL circuit of a recording synchronizing signal generating unit generates an original clock. Pulses of the original clock are counted by a decimating counter, which outputs a decimating instruction to decimate a pulse from the original clock each time the count reaches a preset count. Based on the decimating instruction, a pulse is decimated from the original clock, and a decimated clock is frequency-divided at a fixed frequency-dividing ratio by a frequency divider, which outputs a pixel clock for recording the image. Since the frequency of the pixel clock is varied by decimating the original clock based on the preset count, the image can accurately be recorded on the PS plate by determining in advance the preset count depending on the positional relationship between the PS plate and the optical unit.

Abstract translation: 通过光束将图像精确地记录在缠绕在以恒定速度旋转的滚筒上的PS板上。 旋转编码器通过从光学单元发射到PS板的光束来检测在主扫描方向上的记录位置的信息。 基于检测到的信息，记录同步信号生成单元的PLL电路产生原始时钟。 原始时钟的脉冲由抽取计数器计数，该计数器在每次计数达到预设计数时输出抽取指令以从原始时钟抽取脉冲。 基于抽取指令，从原始时钟脉冲被抽取，并且抽取的时钟以分频器以固定的分频比进行分频，分频器输出用于记录图像的像素时钟。 由于通过基于预设计数来抽取原始时钟来改变像素时钟的频率，所以可以通过根据PS板和光学单元之间的位置关系预先确定预设计数来将图像准确地记录在PS板上 。

公开(公告)号：US06426765B1

公开(公告)日：2002-07-30

申请号：US09285845

申请日：1999-04-05

Applicant: Osamu Iwasaki ,  Naoji Otsuka ,  Kiichiro Takahashi

Inventor： Osamu Iwasaki ,  Naoji Otsuka ,  Kiichiro Takahashi

IPC: B41J2938

CPC classification number: B41J2/04505 ,  B41J2/04541 ,  B41J2/04543 ,  B41J2/0458 ,  B41J29/393 ,  H04N1/053 ,  H04N1/12 ,  H04N1/1911 ,  H04N2201/0471 ,  H04N2201/04717 ,  H04N2201/04732 ,  H04N2201/04786

Abstract: With a printing apparatus and a head driving method according to the present invention, a plurality of printing heads having a plurality of recording elements and a printing medium are relatively moved in a prescribed direction, and the plurality of recording elements of each printing head are divided into a plurality of blocks and each element in each block are driven in a prescribed sequence during the relative movement. As a print position offset between the plurality of printing heads in the prescribed direction on the printing medium is detected and the detected amount is greater than a prescribed amount, on the basis of block sequence designater, an in-block driving sequence is set independently for the each printing head and on the basis of a sequence generated by block sequence generater, the each printing head is driven. Correcting the print position offset in this way produces accuracy of printing position adjustment between printing heads in the main scanning direction, and thereby correcting a registration offset with accuracy can achieve a high quality image.

Abstract translation: 利用根据本发明的打印装置和头驱动方法，具有多个记录元件和打印介质的多个打印头在规定的方向上相对移动，并且将每个打印头的多个记录元件分开 成为多个块，并且在相对移动期间，每个块中的每个元素以规定的顺序被驱动。 当检测到打印介质上的规定方向上的多个打印头之间的打印位置偏移量并且检测量大于规定量时，基于块顺序指定器，独立设置块内驱动顺序 每个打印头，并且基于由块序列发生器产生的序列，每个打印头被驱动。 以这种方式校正打印位置偏移产生打印头在主扫描方向上的打印位置调整的精度，从而校正精准的对准偏移可以实现高质量的图像。

公开(公告)号：US20020085081A1

公开(公告)日：2002-07-04

申请号：US09750292

申请日：2000-12-29

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：US20020083609A1

公开(公告)日：2002-07-04

申请号：US10001171

申请日：2001-12-04

Inventor： Peter Melzer ,  Volker Haushahn ,  Andre Wirtz

IPC: G01B005/20

CPC classification number: H04N1/047 ,  H04N2201/0471 ,  H04N2201/04724 ,  H04N2201/04727 ,  H04N2201/04734 ,  H04N2201/04793

Abstract: A method and an apparatus for measuring linearity in a reproduction appliance includes an operating carriage bearing a scanning or recording device. The operating carriage is able to be moved in discrete steps in a given direction along a straight line. The operating carriage is successively moved along partial segments of the line. Each of the partial segments is longer than a travel corresponding to one of the steps and is shorter than the entire length of the line. The partial segments each have an exactly defined length defined by an additional carriage moveable along the given direction. The number of steps needed for each partial segment are counted and deviations between values for a travel of the operating carriage resulting from the partial segment and values for the travel of the operating carriage resulting from counting the steps are calculated.

Abstract translation: 用于测量再现设备中线性度的方法和装置包括具有扫描或记录装置的操作托架。 操作托架能够沿着一条直线在给定的方向上以离散的步进移动。 操作托架沿线的部分段依次移动。 每个部分段比对应于一个步骤的行程长，并且比行的整个长度短。 部分片段各自具有由沿着给定方向移动的附加支架限定的精确限定的长度。 计算每个部分段所需的步数，并计算由部分段产生的操作滑架的行程值和由计数步骤导致的操作滑架的行程值之间的偏差。

公开(公告)号：US20020057328A1

公开(公告)日：2002-05-16

申请号：US09987371

申请日：2001-11-14

Applicant: FUJI PHOTO FILM CO., LTD

Inventor： Takeshi Fujii

IPC: B41J002/435 ,  B41J002/47

CPC classification number: H04N1/047 ,  H04N1/06 ,  H04N1/195 ,  H04N2201/02425 ,  H04N2201/02441 ,  H04N2201/02443 ,  H04N2201/0426 ,  H04N2201/0471 ,  H04N2201/04724 ,  H04N2201/04729 ,  H04N2201/04731 ,  H04N2201/04734 ,  H04N2201/04762 ,  H04N2201/04789 ,  H04N2201/04791 ,  H04N2201/04796 ,  H04N2201/04798

Abstract: The image recording method and apparatus deflect light from a group of two-dimensionally disposed light source elements to move an image formed on a recording medium in accordance with a movement of the recording medium, or shift modulation data of the group of two-dimensionally disposed light source elements in a first moving direction of the recording medium on the group of two-dimensionally disposed light source elements in synchronism with the movement of the recording medium, and thereby have the image remain stationary relatively to the recording medium in the main scanning direction, as well as shift sequentially modulation data of the group of two-dimensionally disposed light source elements in a direction opposite to a second moving direction of the optical system in synchronism with a movement of the optical system in the auxiliary scanning direction, and thereby having the image also remain stationary relatively to the recording medium in the auxiliary scanning direction.

Abstract translation: 图像记录方法和装置使来自一组二维设置的光源元件的光偏转，以根据记录介质的移动移动形成在记录介质上的图像，或者二维设置的组的移位调制数据 记录介质的第一移动方向上的光源元件与二维布置的光源元件组同步地与记录介质的移动同步，从而使图像在主扫描方向上相对于记录介质保持静止 并且与辅助扫描方向上的光学系统的移动同步地沿着与光学系统的第二移动方向相反的方向顺序地移动二维设置的光源元件组的调制数据，从而具有 图像也在辅助扫描方向上相对于记录介质保持静止。

公开(公告)号：US20020051137A1

公开(公告)日：2002-05-02

申请号：US09873256

申请日：2001-06-05

Applicant: RICOH COMPANY, LTD.

Inventor： Hidetoshi Ema ,  Akihisa Itabashi

IPC: B41B001/00

CPC classification number: H04N1/053 ,  G06K15/1219 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04772 ,  H04N2201/04781 ,  H04N2201/04794

Abstract: In an image forming apparatus which uses a semiconductor laser as a light source, a semiconductor laser is controlled by adjustment of an image write-in clock, and a highly accurate scanning position alignment is performed with a simple structure. An optical unit scans a rotational photo conductor by a laser light output by a semiconductor laser. A photodetector detects the laser light output by the semiconductor laser at a predetermined position. An electrostatic latent image is formed by scanning the rotational photo conductor based on the laser light detected by the photodetector. By dividing a clock output from a high-frequency clock generation circuit, an image clock which synchronized with the output of the photodetector is generated, and the phase of the image clock is changed.

Abstract translation: 在使用半导体激光器作为光源的图像形成装置中，通过调整图像写入时钟来控制半导体激光器，并且以简单的结构执行高精度的扫描位置对准。 光学单元通过半导体激光器输出的激光扫描旋转光导体。 光检测器检测半导体激光器在预定位置输出的激光。 通过基于由光电检测器检测的激光扫描旋转光导体来形成静电潜像。 通过分频来自高频时钟产生电路的时钟输出，产生与光电检测器的输出同步的图像时钟，并且改变图像时钟的相位。

公开(公告)号：US06369929B2

公开(公告)日：2002-04-09

申请号：US09847351

申请日：2001-05-03

Applicant: Norihisa Takada

Inventor： Norihisa Takada

IPC: G02B2608

CPC classification number: H04N1/0635 ,  G02B26/10 ,  G02B26/123 ,  H04N1/047 ,  H04N1/0607 ,  H04N1/0671 ,  H04N1/1911 ,  H04N2201/0082 ,  H04N2201/02425 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04712 ,  H04N2201/04729 ,  H04N2201/04731 ,  H04N2201/04734 ,  H04N2201/04744 ,  H04N2201/04765 ,  H04N2201/04789 ,  H04N2201/04791 ,  H04N2201/04794 ,  Y10S359/90

Abstract: There is proposed a method and apparatus for multibeam scanning an inner face of a cylindrical drum, in which scanning lines are straightened under a simple control, and an interval between the scanning lines can be easily changed, thereby simplifying a constitution. In an embodiment, while keeping an interval between two light beams projected to an optical scanning system, the light beams are one-dimensionally deflected in mutually orthogonal directions in synchronism with a rotation of the spinner, respectively. In a second embodiment, one light beam is projected along a central axis common with the spinner and the cylindrical drum to the spinner. The other light beams are inclined in a plane including the central axis by a constant angle &phgr;y separately predetermined for each of the other light beams, and further inclined in a direction orthogonal to the plane including a rotation axis by an angle &phgr;x which is determined in synchronism with a rotation angle &thgr; of the spinner.

Abstract translation: 提出了一种用于多边扫描圆筒形筒的内表面的方法和装置，其中扫描线在简单的控制下被拉直，并且扫描线之间的间隔可以容易地改变，从而简化了结构。 在一个实施例中，在保持投影到光学扫描系统的两个光束之间的间隔的同时，光束分别与旋转器的旋转同步地在相互正交的方向上一维地偏转。 在第二实施例中，一个光束沿着与旋转器和圆筒鼓共同的中心轴线投影到旋转器。 其他光束在包括中心轴的平面中以对于每个其它光束分别预定的恒定角度倾斜，并且在垂直于包括旋转轴的平面的方向上倾斜角度phix，该角度phix在 与旋转器的旋转角度θ同步。

公开(公告)号：US06362847B1

公开(公告)日：2002-03-26

申请号：US09333344

申请日：1999-06-15

Applicant: Daniel Eugene Pawley ,  David Anthony Schneider ,  Thomas Campbell Wade ,  Earl Dawson Ward, II

Inventor： Daniel Eugene Pawley ,  David Anthony Schneider ,  Thomas Campbell Wade ,  Earl Dawson Ward, II

IPC: B41J247

CPC classification number: H04N1/053 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/0471 ,  H04N2201/04732 ,  H04N2201/04748 ,  H04N2201/04768

Abstract: The write lines of a color laser printer are maintained substantially equal throughout the printer's operation by an electronic control arrangement. At the factory, the write lines on all photoconductors of the color laser printer are calibrated to be substantially equal, and the ratio of each write line to a measuring line for each photoconductor is ascertained. During operation of the printer, the length of each of the measuring lines is periodically determined through counting the number of PELslice clock timing pulses produced from a PELslice clock operating at a fixed frequency determined during factory calibration. The length of the write line is determined by the product of the length of the measuring line and the factory calibrated ratio of the length of the write line to the length of the measuring line. After each periodic determination, PELslice clock timing pulses are selectively inserted into or removed from the PELslice clock timing pulses for all of the write lines but the write line, which is closest to the desired length, to increase or decrease their lengths to be substantially equal to the write line, which is closest to the desired length. The time for insertion or removal of each of the PEL slices into the train of PELslice clock timing pulses produced by the PELslice clock is determined with each preferably inserted at a non-active portion of a PEL. Each insertion or removal of a PEL slice also may be offset from its determined position.