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公开(公告)号：JP4315184B2
公开(公告)日：2009-08-19
申请号：JP2006297118
申请日：2006-10-31
Applicant: ブラザー工業株式会社
Inventor： 英明 長坂
CPC classification number: H04N1/12 , H04N1/00689 , H04N2201/0454 , H04N2201/04748 , H04N2201/0477
Abstract: An image reading device includes a clock generator, an image sensor, a plurality of switches having a first switch and a second switch, a reader, a first controller, and a second controller. The clock generator generates a first clock signal having a first cycle and a second clock signal having a second cycle shorter than the first cycle. The image sensor detects an image formed on a document to generate an image signal. The image signal is inputted into the first switch and the second switch by rotation. The first switch and the second switch is capable of switching to simultaneously or alternately output the image signal in synchronization with the first clock. The reader reads the image signal outputted from the first switch and the second switch. The first controller controls the first switch to output the image signal to the reader during a first period and to control the second switch to output the image signal to the reader during a second period. The second controller controls the clock generator to generate the first clock signal during the first period and the second period and to generate the second clock signal during a third period that is between the first period and the second period and that is longer than a predetermined period mT and shorter than (k×T1) The T1 is the first cycle. The k is a minimum integer that satisfies mT
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22.发明专利Scanning type optical apparatus, image forming apparatus, and jitter correction method 有权扫描型光学装置，图像形成装置和抖动校正方法
公开(公告)号：JP2008287018A
公开(公告)日：2008-11-27
申请号：JP2007132030
申请日：2007-05-17
Inventor： IWAMOTO KAZUYUKI
CPC classification number: B41J2/471 , G02B26/123 , G06K15/1219 , H04N1/053 , H04N1/1135 , H04N2201/0477
Abstract: PROBLEM TO BE SOLVED: To provide a compact and inexpensive scanning type optical apparatus capable of reducing color smear in a main scanning direction. SOLUTION: The scanning type optical apparatus includes: a rotating polygon mirror provided with a plurality of reflection faces which reflect incident luminous flux while rotating; a first light source which allows a first luminous flux incident from one side of a section on a plane which passes through the rotation axis of the rotating polygon mirror; and a second light source which allows a second luminous flux from the other side. A first calculation means calculates the scanning time with the first light source. The second calculation means calculates the scanning time with the second light source. A jitter correction means corrects the jitter by controlling the pixel clock supplied to the first light source according to the scanning time of the second light source. Further, the jitter correction means corrects the jitter by controlling the pixel clock supplied to the second light source according to the scanning time of the first light source. COPYRIGHT: (C)2009,JPO&INPIT
Abstract translation: 要解决的问题：提供一种能够在主扫描方向上减少颜色污迹的紧凑且廉价的扫描型光学装置。 解决方案：扫描型光学装置包括：旋转多面镜，设置有多个反射面，反射入射光通量同时旋转; 第一光源，其允许从通过旋转多面镜的旋转轴的平面上的部分的一侧入射的第一光束; 以及允许来自另一侧的第二光通量的第二光源。 第一计算装置用第一光源计算扫描时间。 第二计算装置用第二光源计算扫描时间。 抖动校正装置根据第二光源的扫描时间控制提供给第一光源的像素时钟来校正抖动。 此外，抖动校正装置根据第一光源的扫描时间控制提供给第二光源的像素时钟来校正抖动。 版权所有（C）2009，JPO＆INPIT
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公开(公告)号：JP4045454B2
公开(公告)日：2008-02-13
申请号：JP2005029231
申请日：2005-02-04
Applicant: セイコーエプソン株式会社
CPC classification number: H04N1/0473 , H04N1/1013 , H04N1/192 , H04N2201/0477 , H04N2201/04774
Abstract: An analog front-end circuit that controls an imaging device and processes an analog image signal output from the imaging device comprises: an analog processor that receives an analog image signal from the imaging device, provides the image signal with predetermined processing, and outputs a resultant signal; an A/D converter that performs A/D conversion with the image signal output from the analog processor; a holding circuit that holds digital image data output from the A/D converter; a timing generator that, based on a first reference clock, generates a plurality of clocks and outputs the clocks to at least one of the analog processor and the A/D converter; and a spread spectrum modulation circuit that performs spread spectrum modulation with the first reference clock and outputs a resultant clock that has been subject to the spread spectrum modulation as a modulated clock to the holding circuit; wherein the holding circuit holds the digital image data from the A/D converter based on the modulated clock output from the spread spectrum modulation circuit.
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公开(公告)号：JP2007201795A
公开(公告)日：2007-08-09
申请号：JP2006017679
申请日：2006-01-26
Applicant: Ricoh Co Ltd , 株式会社リコー
Inventor： KAGAMI YOSHINOBU
CPC classification number: H04N1/047 , H04N1/00994 , H04N2201/0477
Abstract: PROBLEM TO BE SOLVED: To maintain image quality while reducing EMI (Electromagnetic Interference) in a driving circuit of an original reader.
SOLUTION: A frequency of a basic clock generated by an OSC1 is multiplied by a PLL2, and an SSCG3 performs ON/OFF of a frequency spread. A timing generator 4 generates a timing signal, and a driver IC5 generates a driving signal. A timing constant of the driving signal is switched by a dumping resister. The dumping resister is switched to independent R1 or a parallel connection of R1 and R2 by a MOSFET switch 8. In a case of high speed and middle image quality, the frequency spread is made ON, and the time constant is made small. In a case of middle seed and high image quality, the frequency spread is made OFF, and the time constant is made large. In a case of middle speed and middle image quality, the frequency spread is made ON, and the time constant is made small or large.
COPYRIGHT: (C)2007,JPO&INPITAbstract translation: 要解决的问题：为了保持图像质量，同时降低原始读取器的驱动电路中的EMI（电磁干扰）。 解决方案：由OSC1生成的基本时钟的频率乘以PLL2，SSCG3执行频率扩展的ON / OFF。 定时发生器4产生定时信号，并且驱动器IC5产生驱动信号。 驱动信号的定时常数由倾倒电阻器切换。 倾卸电阻器被MOSFET开关8切换到独立的R1或R1和R2的并联连接。在高速度和中间图像质量的情况下，频率扩展被导通，并且使时间常数变小。 在中等种子和高图像质量的情况下，频率扩展被关闭，并且时间常数变大。 在中速和中图像质量的情况下，频率扩展为ON，时间常数小或大。 版权所有（C）2007，JPO＆INPIT
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Patent Agency Ranking
公开(公告)号：JP2006217372A
公开(公告)日：2006-08-17
申请号：JP2005029231
申请日：2005-02-04
Applicant: Seiko Epson Corp , セイコーエプソン株式会社
Inventor： MIZUTA MASAHIKO , KIMURA MASATSUGU
CPC classification number: H04N1/0473 , H04N1/1013 , H04N1/192 , H04N2201/0477 , H04N2201/04774
Abstract: PROBLEM TO BE SOLVED: To provide an analog front end circuit which suppresses deterioration of image data from an image sensor and copes with EMI, and also provide an electronic apparatus including the same.
SOLUTION: The analog front end circuit includes; an analog processing part 400 which receives an analog image signal APD1 from an imaging device 22 and subjects the image signal APD1 to prescribed processing to output a result; an A/D converter 500 for A/D conversion of an image signal SPD2 output from the analog processing part 400; a holding circuit 100 for holding digital image data DPD output from the A/D converter 500; a timing generator 300 for generating a plurality of clocks on the basis of a first reference clock CLK1 and outputting them to at least one of the analog processing part 400 and the A/D converter 500; and a spectrum spread modulation circuit 200 for subjecting the reference clock CLK1 to spectrum spread modulation and outputting the clock subjected to spectrum spread modulation to the holding circuit 100 as a modulation clock MCLK.
COPYRIGHT: (C)2006,JPO&NCIPIAbstract translation: 要解决的问题：提供一种模拟前端电路，其抑制来自图像传感器的图像数据的劣化并且应对EMI，并且还提供包括该模拟前端电路的电子设备。 解决方案：模拟前端电路包括： 模拟处理部400，其从成像装置22接收模拟图像信号APD1，并对图像信号APD1进行规定处理，输出结果; 用于对从模拟处理部分400输出的图像信号SPD2进行A / D转换的A / D转换器500; 用于保持从A / D转换器500输出的数字图像数据DPD的保持电路100; 定时发生器300，用于基于第一参考时钟CLK1产生多个时钟并将其输出到模拟处理部分400和A / D转换器500中的至少一个; 以及频谱扩展调制电路200，用于对参考时钟CLK1进行频谱扩展调制，并将经过频谱扩展调制的时钟输出到保持电路100作为调制时钟MCLK。 版权所有（C）2006，JPO＆NCIPI
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公开(公告)号：JP2017132084A
公开(公告)日：2017-08-03
申请号：JP2016012472
申请日：2016-01-26
Inventor： 濱中 隆宏
CPC classification number: H04N1/295 , H04N1/0283 , H04N1/0432 , H04N2201/0081 , H04N2201/0082 , H04N2201/0477
Abstract: 【課題】各色の画像間のずれを抑制できる画像形成装置を提供する。 【解決手段】画像形成装置は、偏向器と、感光体2Yと、ミラー351と、変位機構36と、制御部と、を備える。偏向器は、光源が射出するレーザ光を各色の光路に向けて主走査方向に偏向する。感光体2Yは、各光路にあり、レーザ光に露光されて形成される静電潜像が現像されることにより各色の画像が形成される。ミラー351は、各光路にあり、レーザ光を各感光体2Yに向けて反射する。変位機構36は、各ミラー351に設けられ、各色の画像間の傾きずれを補正するためにミラー351を変位させる。制御部は、各色の画像の傾き補正量に応じて、各色の画像における主走査方向の倍率を補正する。 【選択図】図3
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27.发明专利
公开(公告)号：JP5515893B2
公开(公告)日：2014-06-11
申请号：JP2010059563
申请日：2010-03-16
Applicant: 株式会社リコー
CPC classification number: B41J2/473 , G02B26/123 , G02B26/127 , G03G15/043 , G06K15/1219 , H04N1/113 , H04N2201/0477
Abstract: An optical writer includes a scanning part causing a light beam from a light source to perform scanning on a photosensitive body; an image information obtaining part obtaining image information of an image; a dithering information obtaining part obtaining dithering information of the image; a pixel clock generating part generating a pixel clock signal; and a light emission control part to control the light source based on the image information in accordance with the pixel clock signal. The pixel clock generating part modulates the clock frequency of the pixel clock signal in accordance with phase shift information for correcting a change in the speed of the scanning on main scanning lines on the photosensitive body, and determines the timing of modulating the clock frequency based on the dithering information on a main scanning line basis so that the timing of modulating the clock frequency differs between the main scanning lines.
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公开(公告)号：JP4934498B2
公开(公告)日：2012-05-16
申请号：JP2007132030
申请日：2007-05-17
Applicant: キヤノン株式会社
Inventor： 和幸 岩本
CPC classification number: B41J2/471 , G02B26/123 , G06K15/1219 , H04N1/053 , H04N1/1135 , H04N2201/0477
Abstract: A scanning optical device includes a rotating polygonal mirror having a plurality of reflecting faces. A first light source emits a first light beam from one section obtained by sectioning the scanning optical device with a plane passing through the rotation axis of the rotating polygonal mirror. A second light source emits a second light beam from the other section. The first calculation unit calculates scan time of the first light source. The second calculation unit calculates scan time of the second light source. The jitter correction unit corrects jitter by controlling a pixel clock supplied to the first light source according to the scan time of the second light source. The jitter correction unit also corrects jitter by controlling a pixel clock supplied to the second light source according to the scan time of the first light source.
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29.发明专利Optical writing unit, image forming apparatus, and method for controlling optical writing unit 有权光学写字单元，图像形成装置和控制光写单元的方法
公开(公告)号：JP2011189692A
公开(公告)日：2011-09-29
申请号：JP2010059563
申请日：2010-03-16
Applicant: Ricoh Co Ltd , 株式会社リコー
Inventor： MIYADERA TATSUYA , HAYASHI MASAYUKI , SHIRASAKI YOSHINORI
CPC classification number: B41J2/473 , G02B26/123 , G02B26/127 , G03G15/043 , G06K15/1219 , H04N1/113 , H04N2201/0477
Abstract: PROBLEM TO BE SOLVED: To prevent the degradation of image quality inexpensively, when correcting scan speed unevenness in an optical writing unit. SOLUTION: The optical writing unit includes: an image information obtaining part 123; a dither information obtaining part 124 obtaining the dither information of an image; a light emission control part 121 controlling a light source based on a pixel clock and image information; and a phase shift part 122 modulating a clock frequency according to phase shift information, changing the timing of modulating the clock frequency for each main scan line, and deciding the timing of modulating the clock frequency based the obtained dither information, to produce the pixel clock. COPYRIGHT: (C)2011,JPO&INPIT
Abstract translation: 要解决的问题：为了在校正光学写入单元中的扫描速度不均匀性时廉价地防止图像质量的劣化。 光写入单元包括：图像信息获取部123; 抖动信息获取部件124获得图像的抖动信息; 基于像素时钟和图像信息控制光源的发光控制部121; 以及根据相移信息调制时钟频率的相移部分122，改变对每个主扫描线调制时钟频率的定时，并且基于获得的抖动信息确定调制时钟频率的定时，以产生像素时钟 。 版权所有（C）2011，JPO＆INPIT
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