公开(公告)号：US20070242127A1

公开(公告)日：2007-10-18

申请号：US11765054

申请日：2007-06-19

申请人： Atsufumi OMORI ,  Masaaki Ishida ,  Yasuhiro Nihei ,  Yoshinori Hayashi

发明人： Atsufumi OMORI ,  Masaaki Ishida ,  Yasuhiro Nihei ,  Yoshinori Hayashi

IPC分类号： B41J2/435

CPC分类号： G02B26/122 ,  B41J2/471 ,  G06K15/1219 ,  H04N1/053 ,  H04N2201/02443 ,  H04N2201/04768 ,  H04N2201/04798

摘要： A pixel clock generating apparatus comprises a data offset circuit and a pixel generator. The data offset circuit defines multiple data blocks, each data block consisting of a predetermined number of successive clocks, and produces phase data for each data block. The phase data represents an amount and a direction of phase shift to be carried out for a certain clock in each data block. The pixel generator receives the phase data from the data offset circuit and generates a phase-shifted pixel clock a predetermined number of times in each data block based on the phase data.

摘要翻译： 像素时钟产生装置包括数据偏移电路和像素发生器。 数据偏移电路定义多个数据块，每个数据块由预定数量的连续时钟组成，并产生每个数据块的相位数据。 相位数据表示对于每个数据块中的某个时钟执行的相移的量和方向。 像素生成器从数据偏移电路接收相位数据，并且基于相位数据在每个数据块中产生预定次数的相移像素时钟。

公开(公告)号：US07271824B2

公开(公告)日：2007-09-18

申请号：US10259769

申请日：2002-09-30

申请人： Atsufumi Omori ,  Masaaki Ishida ,  Yasuhiro Nihei ,  Yoshinori Hayashi

发明人： Atsufumi Omori ,  Masaaki Ishida ,  Yasuhiro Nihei ,  Yoshinori Hayashi

IPC分类号： B41J2/435

CPC分类号： G02B26/122 ,  B41J2/471 ,  G06K15/1219 ,  H04N1/053 ,  H04N2201/02443 ,  H04N2201/04768 ,  H04N2201/04798

摘要： A pixel clock generating apparatus includes a data offset circuit and a pixel generator. The data offset circuit defines multiple data blocks, each data block consisting of a predetermined number of successive clocks, and produces phase data for each data block. The phase data represents an amount and a direction of phase shift to be carried out for a certain clock in each data block. The pixel generator receives the phase data from the data offset circuit and generates a phase-shifted pixel clock a predetermined number of times in each data block based on the phase data.

摘要翻译： 像素时钟产生装置包括数据偏移电路和像素发生器。 数据偏移电路定义多个数据块，每个数据块由预定数量的连续时钟组成，并产生每个数据块的相位数据。 相位数据表示对于每个数据块中的某个时钟执行的相移的量和方向。 像素生成器从数据偏移电路接收相位数据，并且基于相位数据在每个数据块中产生预定次数的相移像素时钟。

公开(公告)号：US08610971B2

公开(公告)日：2013-12-17

申请号：US13275794

申请日：2011-10-18

申请人： Atsufumi Omori ,  Masaaki Ishida ,  Yasuhiro Nihei ,  Muneaki Iwata

发明人： Atsufumi Omori ,  Masaaki Ishida ,  Yasuhiro Nihei ,  Muneaki Iwata

IPC分类号： H04N1/04

CPC分类号： H04N1/506 ,  G03G15/5058 ,  H04N1/0473 ,  H04N1/12 ,  H04N2201/0471 ,  H04N2201/04781 ,  H04N2201/04793

摘要： An image forming apparatus that forms an image includes: a photosensitive element; an optical scanning device that includes a light source, and scans a surface of the photosensitive element in a main scanning direction with light emitted from the light source to form a latent image; a developing unit that develops the latent image; a photosensitive element period detecting sensor that detects a rotation period of the photosensitive element; a density sensor that detects a density variation of an image developed by the developing unit, in a sub scanning direction; and a processing device that corrects a driving signal of the light source according to the image information, based on an output signal of the density sensor and an output signal of the photosensitive element period detecting sensor.

摘要翻译： 形成图像的图像形成装置包括：感光元件; 光学扫描装置，其包括光源，并且利用从所述光源发射的光来在所述主扫描方向上扫描所述感光元件的表面以形成潜像; 显影单元，其显影潜像; 感光元件周期检测传感器，其检测感光元件的旋转周期; 密度传感器，其检测由所述显影单元在副扫描方向上显影的图像的浓度变化; 以及处理装置，其基于密度传感器的输出信号和感光元件周期检测传感器的输出信号，根据图像信息校正光源的驱动信号。

公开(公告)号：US08310513B2

公开(公告)日：2012-11-13

申请号：US12693775

申请日：2010-01-26

申请人： Yasuhiro Nihei ,  Masaaki Ishida ,  Atsufumi Omori

发明人： Yasuhiro Nihei ,  Masaaki Ishida ,  Atsufumi Omori

IPC分类号： B41J2/47

CPC分类号： B41J2/473 ,  G02B26/10 ,  G03G15/04072 ,  G03G15/0435 ,  G03G2215/0404 ,  G06K15/1261 ,  H04N1/02865 ,  H04N1/113 ,  H04N2201/04767

摘要： In a light-source driving device, a high-frequency clock generating circuit generates two high-frequency clock signals having mutually different phases, an image-data creating circuit creates a plurality of image data corresponding to a plurality of light-emitting units according to image information, and a write control circuit creates a plurality of modulated data corresponding to the light-emitting units from the plurality of image data and separately controls output timings of the plurality of modulated data by using a time, as a unit, corresponding to a phase difference between the two high-frequency clock signals. The write control circuit includes two data switching circuits that set a correspondence relation between image data and PWM data based on one of a relation between an array of the light-emitting units and an array of a plurality of light spots and a relation between a surface to be scanned and a main scanning direction.

摘要翻译： 在光源驱动装置中，高频时钟生成电路生成具有相互不同相位的两个高频时钟信号，图像数据生成电路根据与图像数据生成电路对应的多个发光单元生成多个图像数据 图像信息和写入控制电路从多个图像数据创建对应于发光单元的多个调制数据，并且通过使用对应于一个单元的时间单独地控制多个调制数据的输出定时 两个高频时钟信号之间的相位差。 写控制电路包括两个数据切换电路，其基于发光单元的阵列与多个光点的阵列之间的关系和表面之间的关系之一来设置图像数据和PWM数据之间的对应关系 被扫描和主扫描方向。

公开(公告)号：US07995251B2

公开(公告)日：2011-08-09

申请号：US12055666

申请日：2008-03-26

申请人： Jun Tanabe ,  Masaaki Ishida ,  Yasuhiro Nihei ,  Atsufumi Omori

发明人： Jun Tanabe ,  Masaaki Ishida ,  Yasuhiro Nihei ,  Atsufumi Omori

IPC分类号： H04N1/04

CPC分类号： G02B26/123 ,  G02B26/124 ,  H04N1/40068

摘要： A light-source drive control unit divides each pixel of the image data into a plurality of subpixels, deletes certain subpixels from the image data in accordance with predetermined correction data, shifts remaining subpixels in the sub-scanning direction thereby obtaining reduced image data, and controls a plurality of light sources based on the reduced image data in such a manner that one line of the subpixels is formed with a light beam emitted from a corresponding one of the light sources.

摘要翻译： 光源驱动控制单元将图像数据的每个像素分成多个子像素，根据预定的校正数据从图像数据中删除某些子像素，在副扫描方向上移动剩余的子像素，从而获得缩小的图像数据，以及 基于缩小图像数据控制多个光源，使得一行子像素由从相应的一个光源发射的光束形成。

公开(公告)号：US07834902B2

公开(公告)日：2010-11-16

申请号：US11741871

申请日：2007-04-30

申请人： Yasuhiro Nihei ,  Masaaki Ishida ,  Atsufumi Omori ,  Dan Ozasa

发明人： Yasuhiro Nihei ,  Masaaki Ishida ,  Atsufumi Omori ,  Dan Ozasa

IPC分类号： B41J2/435

CPC分类号： G02B26/127 ,  G06K15/1219

摘要： In a pixel clock creation method and device, a high frequency clock is created. A scanning time needed to scan a predetermined scanning length is detected in accuracy of half a period of the high frequency clock to output a detection value indicating the detected scanning time. The detection value and a predetermined target value are compared to output a comparison result. A phase data is created based on the comparison result. A pixel clock whose phase is controlled based on both the high frequency clock and the phase data is created.

摘要翻译： 在像素时钟创建方法和装置中，产生高频时钟。 以高频时钟的半周期的精度检测扫描预定扫描长度所需的扫描时间，以输出指示检测到的扫描时间的检测值。 将检测值和预定目标值进行比较以输出比较结果。 基于比较结果创建相位数据。 创建基于高频时钟和相位数据来控制相位的像素时钟。

公开(公告)号：US07701480B2

公开(公告)日：2010-04-20

申请号：US12029115

申请日：2008-02-11

申请人： Atsufumi Omori ,  Masaaki Ishida ,  Yasuhiro Nihei ,  Jun Tanabe

发明人： Atsufumi Omori ,  Masaaki Ishida ,  Yasuhiro Nihei ,  Jun Tanabe

IPC分类号： B41J2/435 ,  B41J2/47

CPC分类号： B41J2/45

摘要： A circuit for driving a plurality of light emitting units includes a current biasing unit that biases a light emitting current with an overshoot current and supplies the resultant current to each of the light emitting units. The light emitting current is determined based on an amount of light emitted from each of the light emitting units.

摘要翻译： 用于驱动多个发光单元的电路包括：电流偏置单元，其利用过冲电流偏置发光电流，并将所得到的电流提供给每个发光单元。 基于从每个发光单元发射的光量来确定发光电流。

公开(公告)号：US20090195635A1

公开(公告)日：2009-08-06

申请号：US12358867

申请日：2009-01-23

申请人： Masaaki Ishida ,  Yasuhiro Nihei ,  Atsufumi Omori ,  Dan Ozasa ,  Jun Tanabe

发明人： Masaaki Ishida ,  Yasuhiro Nihei ,  Atsufumi Omori ,  Dan Ozasa ,  Jun Tanabe

IPC分类号： B41J15/14

CPC分类号： G02B26/127

摘要： A deflector deflects a light beam emitted from a light source including a plurality of light-emitting units. A scanning optical system focuses the light beam deflected by the deflector on a scanning target surface. A monitoring photoreceiver receives a part of a light beam deflected by the deflector and directed toward an area within a scanning area outside an image area. A detecting unit individually detects emission powers of at least two light-emitting units based on an output signal of the monitoring photoreceiver in a single sweep of scanning.

摘要翻译： 偏转器偏转从包括多个发光单元的光源发射的光束。 扫描光学系统将由偏转器偏转的光束聚焦在扫描目标表面上。 监视光接收器接收由偏转器偏转并被指向图像区域外的扫描区域内的区域的一部分光束。 检测单元在单次扫描扫描中基于监视光接收器的输出信号单独地检测至少两个发光单元的发射功率。

公开(公告)号：US20090174915A1

公开(公告)日：2009-07-09

申请号：US12348618

申请日：2009-01-05

申请人： YASUHIRO NIHEI ,  Masaaki Ishida ,  Atsufumi Omori ,  Dan Ozasa ,  Jun Tanabe

发明人： YASUHIRO NIHEI ,  Masaaki Ishida ,  Atsufumi Omori ,  Dan Ozasa ,  Jun Tanabe

IPC分类号： H04N1/04

CPC分类号： H04N1/053 ,  H04N2201/0471 ,  H04N2201/04729 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04784 ,  H04N2201/04789

摘要： A write control circuit includes a first data switching circuit that sets a correspondence relationship between signals from line buffers and input signals to a delay circuitry, based on a signal from a CPU; and a second data switching circuit that sets a correspondence relationship between output signals of the delay circuitry and drive signals, based on a signal from the CPU. This enables a plurality of light emitting sections to be driven properly, regardless of a main scanning direction and an arrangement of a plurality of light spots being in any of CASE-1 to CASE-4 in an optical scanning device.

摘要翻译： 写控制电路包括：第一数据切换电路，其基于来自CPU的信号，将来自线缓冲器的信号和输入信号之间的对应关系设置为延迟电路; 以及第二数据切换电路，其基于来自CPU的信号来设置延迟电路的输出信号和驱动信号之间的对应关系。 这使得能够适当地驱动多个发光部，而不管主扫描方向和在光学扫描装置中的CASE-1至CASE-4中的任何一个的多个光点的布置。

公开(公告)号：US20080088893A1

公开(公告)日：2008-04-17

申请号：US11882691

申请日：2007-08-03

申请人： Masaaki Ishida ,  Yasuhiro Nihei ,  Atsufumi Omori ,  Jun Tanabe

发明人： Masaaki Ishida ,  Yasuhiro Nihei ,  Atsufumi Omori ,  Jun Tanabe

IPC分类号： H04N1/46

CPC分类号： H04N1/40037 ,  G06K15/1219 ,  G06K15/1261 ,  H04N1/0473 ,  H04N1/1135 ,  H04N1/12 ,  H04N1/1911 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04734 ,  H04N2201/04744 ,  H04N2201/04787 ,  H04N2201/04794

摘要： An optical scanning device of the invention includes: n-odd (n≧2) light sources disposed at different positions at least in a sub scanning direction; a light source driving control part configured to control a light emitting state of the light source; and a sub-scanning pixel position detecting part configured to depict one pixel with m-odd (n≧m≧2) light sources of the n-odd (n≧2) light sources and to detect a deviation in position of the one pixel in a sub scanning direction, wherein the light source driving control part is configured to correct the deviation in position of the one pixel in the sub scanning direction at a resolution equal to or higher than a density of the pixel, depicted with the m-odd light sources, by controlling the light emitting state of the m-odd light sources on the basis of a result of detection with the sub-scanning pixel position detecting part.

摘要翻译： 本发明的光学扫描装置包括：至少在副扫描方向上设置在不同位置的n奇数（n> = 2）个光源; 被配置为控制所述光源的发光状态的光源驱动控制部; 以及副扫描像素位置检测部，被配置为用n个奇数（n> = 2）个光源的m奇数（n> = m> = 2）个光源描绘一个像素，并且检测位于 在副扫描方向上的一个像素，其中光源驱动控制部被配置为以等于或高于像素的密度的像素的像素的像素的像素的像素的像素的像素的像素的像素的像素的像素的像素的像素的像素的像素的像素 通过基于用副扫描像素位置检测部分的检测结果控制m个奇数光源的发光状态，可以获得m个奇数光源。