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31. 发明专利

JP2004262101A Pixel clock generator, pixel clock generating method, and image forming apparatus 有权
公开(公告)号：JP2004262101A
公开(公告)日：2004-09-24
申请号：JP2003055222
申请日：2003-03-03
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： KOZASA MADOKA , ISHIDA MASAAKI , NIHEI YASUHIRO , OMORI JUNJI
IPC分类号： B41J2/44
摘要： PROBLEM TO BE SOLVED: To provide pixel clock generator and generating method of novel arrangement for correcting fluctuation of scanning width with high accuracy, and to provide an image forming apparatus in which fluctuation of scanning width is corrected with high accuracy.
SOLUTION: In the pixel clock generator, a detection circuit 3 counts high frequency clocks VCLK being generated from a high frequency clock generating circuit 2 during the period of horizontal sync signals 1 and 2 corresponding to the start and end points of scanning. Difference of the count and a target value is determined by a comparison result generating circuit 4 and phase data for correcting the difference is generated from a data generating circuit 5. Based on the high frequency clock, a pixel clock generating circuit 6 generates a pixel clock PCLK having a phase controlled according to the phase data.
COPYRIGHT: (C)2004,JPO&NCIPI

32. 发明专利

JP2003347664A Semiconductor laser drive circuit and image forming device 有权
标题翻译：半导体激光驱动电路和图像形成装置
公开(公告)号：JP2003347664A
公开(公告)日：2003-12-05
申请号：JP2002155773
申请日：2002-05-29
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： ISHIDA MASAAKI , KYOGOKU HIROAKI , EMA HIDETOSHI , NIHEI YASUHIRO
IPC分类号： B41J2/44 , H01S5/062
摘要： PROBLEM TO BE SOLVED: To provide a high-speed and high-accuracy semiconductor laser drive circuit, and an image forming device. SOLUTION: A drive current, which is made to flow into a semiconductor laser 10, is composed of a sum current from a bias current source 12, a threshold current source 11, a modulation current source 13, and a drive auxiliary current source 14. The bias current source 12 is set to be approximately 1 mA to several mA. The threshold current source 11 is the current source of a threshold where the semiconductor laser 10 emits light. Since the bias current source 12 flows, the threshold current source 11 may be a current where the current value is subtracted (a threshold current-a bias current). The modulation current source 13 is a current source which is modulated according to an input signal, thus controlling the light emission of the semiconductor laser 10. The drive auxiliary current source 14 supplies a current proportional to the modulation current and is an initial ON modulation current which flows during an initial short time when the modulation current is turned on. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供高速和高精度的半导体激光驱动电路和图像形成装置。解决方案：流入半导体激光器10的驱动电流由来自偏置电流源12，阈值电流源11，调制电流源13和驱动辅助电流的和电流构成偏置电流源12被设置为大约1mA至几mA。阈值电流源11是半导体激光器10发光的阈值的电流源。由于偏置电流源12流过，所以阈值电流源11可以是当前值被减去的电流（阈值电流 - 偏置电流）。调制电流源13是根据输入信号调制的电流源，从而控制半导体激光器10的发光。驱动辅助电流源14提供与调制电流成比例的电流，并且是初始ON调制电流其在调制电流接通时的初始短时间内流动。版权所有（C）2004，JPO

33. 发明专利

JP2003344790A Pixel clock generating device, laser scanner, and image forming device 审中-公开
标题翻译：像素钟产生装置，激光扫描仪和图像形成装置
公开(公告)号：JP2003344790A
公开(公告)日：2003-12-03
申请号：JP2002152028
申请日：2002-05-27
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： NIHEI YASUHIRO , ISHIDA MASAAKI
IPC分类号： B41J2/44 , G02B26/10
摘要： PROBLEM TO BE SOLVED: To provide a pixel clock generating device capable of performing precise phase-control with simple constitution, and a laser scanner and an image forming device which are mounted with this pixel clock generating device.
SOLUTION: The pixel clock generating device detects the transition timing of a pixel clock by a transition detecting device 122, and generates control signals a, b for controlling state transition of the pixel clock (PCLK) by a control signal generating circuit 123 based on this timing and phase data inputted externally. A pixel clock (PCLK) control circuit 124 makes the pixel clock (PCLK) transit based on these control signals a, b and a high frequency clock (VCLK).
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供能够以简单的结构进行精确的相位控制的像素时钟产生装置，以及安装有该像素时钟产生装置的激光扫描器和图像形成装置。解决方案：像素时钟生成装置通过转移检测装置122检测像素时钟的转移定时，并且生成用于通过控制信号生成电路123控制像素时钟（PCLK）的状态转移的控制信号a，b 基于从外部输入的定时和相位数据。像素时钟（PCLK）控制电路124基于这些控制信号a，b和高频时钟（VCLK）使像素时钟（PCLK）转移。版权所有（C）2004，JPO

34. 发明专利

JP2003300341A Pixel clock generating device, laser scanning device, and image forming apparatus 审中-公开
标题翻译：像素钟产生装置，激光扫描装置和图像形成装置
公开(公告)号：JP2003300341A
公开(公告)日：2003-10-21
申请号：JP2002108158
申请日：2002-04-10
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： KOZASA MADOKA , ISHIDA MASAAKI , NIHEI YASUHIRO , OMORI JUNJI
IPC分类号： B41J2/44 , G02B26/10 , G02B26/12 , G03G15/04 , H04N1/036 , H04N1/053 , H04N1/113 , H04N1/12
CPC分类号： G02B26/127 , H04N1/053 , H04N1/1135 , H04N1/12 , H04N2201/02439 , H04N2201/0471 , H04N2201/04732 , H04N2201/04744 , H04N2201/04768 , H04N2201/04794
摘要： PROBLEM TO BE SOLVED: To provide a pixel clock generating device that can precisely correct a fluctuation of a scanning width by precisely performing phase controlling of a pixel clock by a simple structure, a laser scanning device and an image forming apparatus.
SOLUTION: The number of clocks in the scanning between photodetectors 108, 109 is counted and the counted value is compared with a targeting value to obtain the compared result. A timing (hereinafter, referred to as transition timing) of transiting a condition (H, L) of the pixel clock (PCLK) for determining a scanning width is determined based on the compared result. A structure for generating a high frequency clock is provided and the pixel clock (PCLK) is generated in synchronism with the high frequency clock based on the transition timing. A laser driving device 114 drives a semiconductor laser device 101 based on the generated pixel clock and input image data.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种像素时钟发生装置，其可以通过简单的结构精确地执行像素时钟的相位控制，激光扫描装置和图像形成装置来精确地校正扫描宽度的波动。
解决方案：计数光电检测器108,109之间扫描的时钟数，并将计数值与目标值进行比较以获得比较结果。基于比较结果来确定用于确定扫描宽度的像素时钟（PCLK）的条件（H，L）的转移的定时（以下称为转移时刻）。提供了一种用于产生高频时钟的结构，并且基于转换时序与高频时钟同步地生成像素时钟（PCLK）。激光驱动装置114基于生成的像素时钟和输入图像数据来驱动半导体激光装置101。版权所有（C）2004，JPO

35. 发明专利

JP2017116314A 距離センサ、走行体、ロボット及び３次元計測装置审中-公开
公开(公告)号：JP2017116314A
公开(公告)日：2017-06-29
申请号：JP2015249639
申请日：2015-12-22
申请人：株式会社リコー , Ricoh Co Ltd
发明人： TAKAHASHI SHU , MASUDA KOJI , NIHEI YASUHIRO , OGAWA TAKESHI , TANAKA HIROMASA , ITO MASAHIRO
IPC分类号： G01S7/486 , G01C3/06 , G01S17/89
摘要：【課題】物体までの距離の測定精度を向上させることができ距離センサを提供する。【解決手段】光源は、デューティが50%未満のパルス光を射出する。3次元情報取得部は、パルス光に対する位相が互いに異なる4種類の読み出し信号(サブフレームAでのTX1信号、TX2信号、サブフレームBでのTX1信号、TX2信号)をイメージセンサに出力する。各読み出し信号は、パルス光における1個のパルスに対応して2個のパルスを有し、該2個のパルスは、パルス光におけるパルス幅T0の2倍だけずれた関係にある。【選択図】図9

36. 发明专利

JP2014162164A Exposure device and image formation device 有权
标题翻译：曝光装置和图像形成装置
公开(公告)号：JP2014162164A
公开(公告)日：2014-09-08
申请号：JP2013036540
申请日：2013-02-27
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： NIHEI YASUHIRO
IPC分类号： B41J2/44 , B41J2/45 , B41J2/455 , G02B27/18 , G03G15/04 , G03G15/043 , G03G21/14 , H04N1/036
摘要： PROBLEM TO BE SOLVED: To provide an exposure device capable of performing optical writing of high quality.SOLUTION: A writing control part comprises: a pitch measurement part 401 which generates pitch data from an output signal of a TM sensor and an output signal of a home position sensor; an interval data generation part 402 which generates interval data for adjusting cycles of an LSYNC signal so that a pitch error is suppressed based upon the pitch data; an exposure timing signal generation part 403 which generates a LOAD signal, an STBa signal, an STBb signal, an STBc signal, an STBd signal, a CLK signal, and an LSYNC signal; an image data generation part 404 which outputs image data of one line, etc. In this case, unevenness in line pitch in a sub direction due to eccentricity characteristics of a photoreceptor drum is corrected to achieve precise multiple exposure at the same position with a last latent image during the multiple exposure.
摘要翻译：要解决的问题：提供一种能够进行高质量的光写入的曝光装置。解决方案：一种写入控制部分，包括：俯仰测量部分401，其从TM传感器的输出信号产生音调数据，并输出信号原位传感器; 间隔数据生成部402，其生成用于调整LSYNC信号的周期的间隔数据，使得基于音调数据抑制音调误差; 产生LOAD信号，STBa信号，STBb信号，STBc信号，STBd信号，CLK信号和LSYNC信号的曝光定时信号生成部403; 输出一条线的图像数据的图像数据生成部分404等。在这种情况下，校正由于感光鼓的偏心特性而导致的副方向上的线间距的不均匀性，以在相同位置实现精确的多次曝光，多次曝光时的潜像。

37. 发明专利

JP2013257187A Movement information detection device and multicolor image forming device 有权
标题翻译：运动信息检测装置和多媒体图像形成装置
公开(公告)号：JP2013257187A
公开(公告)日：2013-12-26
申请号：JP2012132355
申请日：2012-06-11
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： MASUDA KOJI , FUNATO HIROYOSHI , KUDO KOICHI , NIHEI YASUHIRO , UEDA TAKESHI
IPC分类号： G01B11/00 , B41J29/38 , G03G15/16
摘要： PROBLEM TO BE SOLVED: To provide a movement information detection device suitable for real-time detection while eliminating an estimated error of a peak position, and a multicolor image forming device using the same.SOLUTION: A movement information detection device comprises: a light source; a coupling lens for guiding a beam emitted from the light source to irradiate a moving member; an image sensor having a plurality of pixels and acquiring one- or two-dimensional image; an imaging lens for imaging a scattered beam scattered by the moving member on the image sensor; image pattern acquiring means for acquiring an image pattern on the image sensor in time series; and movement information calculation means for calculating a cross-correlation function between two image patterns P1, P2 adjacent to each other in acquisition time, and calculating a speed or displacement of the moving member. The movement information calculation means for calculating the cross-correlation function includes a step of executing discrete Fourier transform and a step of removing background in a frequency space.
摘要翻译：要解决的问题：提供适于实时检测的运动信息检测装置，同时消除峰值位置的估计误差，以及使用其的多色图像形成装置。解决方案：移动信息检测装置包括：光源 ; 用于引导从光源发射的光束照射移动部件的耦合透镜; 具有多个像素并获取一维或二维图像的图像传感器; 成像透镜，用于对由所述移动构件在所述图像传感器上散射的散射光进行成像; 图像图案获取装置，用于以时间序列获取图像传感器上的图像图案; 以及运动信息计算装置，用于在获取时间中计算彼此相邻的两个图像图案P1，P2之间的互相关函数，并计算移动部件的速度或位移。用于计算互相关函数的运动信息计算装置包括执行离散傅里叶变换的步骤和去除频率空间中的背景的步骤。

38. 发明专利

JP2012133065A Image forming device 有权
标题翻译：图像形成装置
公开(公告)号：JP2012133065A
公开(公告)日：2012-07-12
申请号：JP2010284081
申请日：2010-12-21
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： NIHEI YASUHIRO , MASUDA KOJI
IPC分类号： G03G15/01 , G03G15/00
摘要： PROBLEM TO BE SOLVED: To provide an image forming device capable of forming a high quality image without causing high cost, an increase in size and reduction of working efficiency.SOLUTION: Patterns for detecting concentration have four rectangular patterns having different toner concentration from one another and are adjacent to one another in a principal direction and in a sub direction. A reflective optical sensor comprises: an irradiation system including eleven light emitting sections disposed along the principal direction; a light receiving system including eleven light receivers; and the like. After an m th image of a plurality of images has been formed, a printer controller performs image process control at a timing before an (m+1) th image is formed. During this time period, the printer controller simultaneously causes two light emitting sections of the reflective optical sensor to emit light and simultaneously obtains toner concentration of two rectangular patterns formed at different positions from each other with respect to the principal direction based on an output signal of the light receiving system.
摘要翻译：要解决的问题：提供一种能够形成高质量图像而不造成高成本，尺寸增加和降低工作效率的图像形成装置。解决方案：用于检测浓度的图案具有彼此不同的调色剂浓度的四个矩形图案，并且在主方向和副方向上彼此相邻。反射型光学传感器包括：照射系统，包括沿着主要方向设置的11个发光部分; 包括11个光接收器的光接收系统; 等等。在形成多个图像的第m图像之后，打印机控制器在形成第（m + 1）个图像之前的时刻执行图像处理控制。在该时间段期间，打印机控制器同时使反射光学传感器的两个发光部分发光，并同时获得基于主方向的不同位置形成的两个矩形图案的调色剂浓度，光接收系统。版权所有（C）2012，JPO＆INPIT

39. 发明专利

JP2011191657A Reflective optical sensor and image forming apparatus 审中-公开
标题翻译：反射光学传感器和图像形成装置
公开(公告)号：JP2011191657A
公开(公告)日：2011-09-29
申请号：JP2010059514
申请日：2010-03-16
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： NIHEI YASUHIRO , MASUDA KOJI
IPC分类号： G03G15/01 , G03G21/14
摘要： PROBLEM TO BE SOLVED: To provide an array-type reflective optical sensor capable of prolonging the life thereof, and to provide an image forming apparatus including the reflective optical sensor. SOLUTION: The reflective optical sensor includes: a plurality of light emitters arrayed in a predetermined direction to irradiate a toner pattern with detection light; and a plurality of light receivers disposed corresponding to the plurality of light emitters to receive the detection light reflected by the toner pattern; wherein the density of the toner pattern and/or the position of the toner pattern are detected. The density of the toner pattern and/or the position of the toner pattern are detected by using at least one light emitter of the plurality of light emitters and the corresponding light receiver, and after a lapse of predetermined time, the density of the toner pattern and/or the position of the toner pattern are detected by using a light emitter and the corresponding light receiver other than the one light emitter and the corresponding light receiver. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够延长其寿命的阵列式反射型光学传感器，并提供包括反射型光学传感器的图像形成装置。解决方案：反射型光学传感器包括：沿预定方向排列的多个发光体，用检测光照射调色剂图案; 以及对应于所述多个发光体设置的多个光接收器，以接收由所述调色剂图案反射的检测光; 其中检测调色剂图案的密度和/或调色剂图案的位置。调色剂图案的密度和/或调色剂图案的位置通过使用多个发光体和相应的光接收器中的至少一个光发射器来检测，并且在经过预定时间之后，调色剂图案的密度和/或调色剂图案的位置通过使用除了一个光发射器和相应的光接收器之外的光发射器和相应的光接收器来检测。版权所有（C）2011，JPO＆INPIT

40. 发明专利

JP2011016296A Light source driving device, light scanning apparatus, and image forming apparatus 有权
标题翻译：光源驱动装置，光扫描装置和图像形成装置
公开(公告)号：JP2011016296A
公开(公告)日：2011-01-27
申请号：JP2009162723
申请日：2009-07-09
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： NIHEI YASUHIRO , ISHIDA MASAAKI , OMORI JUNJI
IPC分类号： B41J2/44 , G02B26/10 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To provide a light source driving device which accurately controls a lighting timing of a plurality of light emitting parts in real time.SOLUTION: The light source driving device includes a high-frequency clock generating circuit 213 which generates two high-frequency clock signals different from each other in phase, a pixel clock generating circuit 215 which generates a pixel clock signal PCLK on the basis of the high-frequency clock signals from the high-frequency clock generating circuit 213 and phase data, an image data forming circuit 216 which forms a plurality of image data (write data) corresponding to a plurality of the light emitting parts according to image information, a writing control circuit 219 which forms a plurality of modulation data corresponding to a plurality of the light emitting parts from a plurality of the write data and the phase data and individually adjusts output timings of the plurality of modulation data making a "phase-difference corresponding time" a unit, and a light source driving circuit 221 which drives a plurality of the light emitting parts on the basis of a plurality of PWM data output from the writing control circuit 219.
摘要翻译：要解决的问题：提供一种能够实时精确地控制多个发光部件的点亮时间的光源驱动装置。解决方案：光源驱动装置包括：高频时钟发生电路213，基于来自高频时钟发生电路213的高频时钟信号和相位数据生成像素时钟信号PCLK的像素时钟生成电路215，图像数据形成电路216，其根据图像信息形成与多个发光部件对应的多个图像数据（写入数据）;写入控制电路219，其形成与多个发光部件对应的多个调制数据多个写入数据和相位数据，并且分别调整形成“相位差c”的多个调制数据的输出定时对应时间“单元，以及基于从写入控制电路219输出的多个PWM数据驱动多个发光部的光源驱动电路221。

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