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公开(公告)号：CN101308254A
公开(公告)日：2008-11-19
申请号：CN200810099082.4
申请日：2008-05-16
Applicant: 佳能株式会社
Inventor： 岩本和幸
CPC classification number: B41J2/471 , G02B26/123 , G06K15/1219 , H04N1/053 , H04N1/1135 , H04N2201/0477
Abstract: 本发明提供扫描光学装置、图像形成装置和抖动校正方法。一种扫描光学装置，包括具有多个反射面的旋转多面镜。第一光源从通过用经过旋转多面镜的旋转轴的平面分割扫描光学装置获得的一个部分发射第一光束。第二光源从另一部分发射第二光束。第一计算单元计算第一光源的扫描时间。第二计算单元计算第二光源的扫描时间。抖动校正单元通过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。抖动校正单元也通过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。
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公开(公告)号：CN101308254B
公开(公告)日：2010-09-15
申请号：CN200810099082.4
申请日：2008-05-16
Applicant: 佳能株式会社
Inventor： 岩本和幸
CPC classification number: B41J2/471 , G02B26/123 , G06K15/1219 , H04N1/053 , H04N1/1135 , H04N2201/0477
Abstract: 本发明提供扫描光学装置、图像形成装置和抖动校正方法。一种扫描光学装置，包括具有多个反射面的旋转多面镜。第一光源从通过用经过旋转多面镜的旋转轴的平面分割扫描光学装置获得的一个部分发射第一光束。第二光源从另一部分发射第二光束。第一计算单元计算第一光源的扫描时间。第二计算单元计算第二光源的扫描时间。抖动校正单元通过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。抖动校正单元也通过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。
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公开(公告)号：CN102193192B
公开(公告)日：2014-07-23
申请号：CN201110070491.3
申请日：2011-03-16
Applicant: 株式会社理光
CPC classification number: B41J2/473 , G02B26/123 , G02B26/127 , G03G15/043 , G06K15/1219 , H04N1/113 , H04N2201/0477
Abstract: 本发明提供一种光写入器、图像形成设备以及光写入器的控制方法。该光写入器包括：使来自光源的光束在感光体上扫描的扫描部、获取图像中的图像信息的图像信息获取部、获取所述图像中的抖动信息的抖动信息获取部、产生像素时钟信号的像素时钟生成部和基于所获得的所述图像信息根据所述像素时钟信号来控制所述光源的光发射控制部。所述像素时钟生成部根据用于校正感光体上的主扫描线上的扫描速率变化的相移信息来调制像素时钟信号的时钟频率，并且基于以主扫描线为基础的抖动信息确定时钟频率的所述调制时刻，从而使主扫描线之间的时钟频率的调制时刻不同。
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公开(公告)号：CN102193192A
公开(公告)日：2011-09-21
申请号：CN201110070491.3
申请日：2011-03-16
Applicant: 株式会社理光
CPC classification number: B41J2/473 , G02B26/123 , G02B26/127 , G03G15/043 , G06K15/1219 , H04N1/113 , H04N2201/0477
Abstract: 本发明提供一种光写入器、图像形成设备以及光写入器的控制方法。该光写入器包括：使来自光源的光束在感光体上扫描的扫描部、获取图像中的图像信息的图像信息获取部、获取所述图像中的抖动信息的抖动信息获取部、产生像素时钟信号的像素时钟生成部和基于所获得的所述图像信息根据所述像素时钟信号来控制所述光源的光发射控制部。所述像素时钟生成部根据用于校正感光体上的主扫描线上的扫描速率变化的相移信息来调制像素时钟信号的时钟频率，并且基于以主扫描线为基础的抖动信息确定时钟频率的所述调制时刻，从而使主扫描线之间的时钟频率的调制时刻不同。
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公开(公告)号：US20060176525A1
公开(公告)日：2006-08-10
申请号：US11347686
申请日：2006-02-03
Applicant: Masahiko Mizuta , Kenji Kimura
Inventor： Masahiko Mizuta , Kenji Kimura
IPC: H04N1/04
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.
Abstract translation: 控制成像装置并处理从成像装置输出的模拟图像信号的模拟前端电路包括：模拟处理器，其从成像装置接收模拟图像信号，以预定的处理提供图像信号，并输出结果 信号; A / D转换器，利用从模拟处理器输出的图像信号进行A / D转换; 保持电路，其保持从A / D转换器输出的数字图像数据; 定时发生器，其基于第一参考时钟产生多个时钟，并且将所述时钟输出到所述模拟处理器和所述A / D转换器中的至少一个; 以及扩频调制电路，其利用所述第一参考时钟进行扩频调制，并将经过所述扩频调制的合成时钟作为调制时钟输出到所述保持电路; 其中保持电路基于从扩展频谱调制电路输出的调制时钟保持来自A / D转换器的数字图像数据。
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Patent Agency Ranking
6.发明授权Optical writer, image forming apparatus, and method of controlling optical writer 有权光学写入器，图像形成装置和控制光学写入器的方法公开(公告)号：US08395648B2
公开(公告)日：2013-03-12
申请号：US13046893
申请日：2011-03-14
Applicant: Tatsuya Miyadera , Masayuki Hayashi , Yoshinori Shirasaki
Inventor： Tatsuya Miyadera , Masayuki Hayashi , Yoshinori Shirasaki
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.
Abstract translation: 光学写入器包括使来自光源的光束在感光体上进行扫描的扫描部分; 获取图像的图像信息的图像信息获取部分; 抖动信息获取部分获得图像的抖动信息; 产生像素时钟信号的像素时钟产生部分; 以及发光控制部，其根据像素时钟信号基于图像信息来控制光源。 像素时钟生成部根据用于校正感光体上的主扫描线上的扫描速度的变化的相移信息来调制像素时钟信号的时钟频率，并且基于 在主扫描线基础上的抖动信息，使得调制时钟频率的定时在主扫描线之间不同。
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公开(公告)号：US06693725B1
公开(公告)日：2004-02-17
申请号：US09614771
申请日：2000-07-12
Applicant: Hiromasa Kanno
Inventor： Hiromasa Kanno
IPC: G06F1500
CPC classification number: H04N1/053 , H04N1/506 , H04N2201/02443 , H04N2201/0471 , H04N2201/04722 , H04N2201/04729 , H04N2201/04732 , H04N2201/04748 , H04N2201/0477 , H04N2201/04789 , H04N2201/04793 , H04N2201/04798
Abstract: The multicolor image forming apparatus according to the present invention comprises openings near the edge of the laser beam scanning start side, near the center, and near the edge of the laser beam scanning end side, on the photoconductor belt. The multicolor image forming apparatus measures time intervals from the horizontal synchronizing signal to the detection of the scanning start-side opening, the center opening, and the scanning end-side opening, respectively. The multicolor image forming apparatus calculates the function indicating the scanning speed at time t along the surface of the photoconductor, to correct the function indicating an image clock frequency at time t.
Abstract translation: 根据本发明的多色图像形成装置包括在激光束扫描开始侧的边缘附近，靠近激光束扫描端侧的中心附近并且在感光带上的开口。 多色图像形成装置分别测量从水平同步信号到扫描起始侧开口，中心开口和扫描端侧开口的检测的时间间隔。 多色图像形成装置计算表示沿着感光体表面的时刻t的扫描速度的功能，以校正在时刻t表示图像时钟频率的功能。
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8.发明公开Clock synchronization for optical beam splitter 审中-公开Taktsynchronisation eines optischen Strahlteilers
公开(公告)号：EP0967781A1
公开(公告)日：1999-12-29
申请号：EP99201887.9
申请日：1999-06-14
Applicant: EASTMAN KODAK COMPANY
IPC: H04N1/053
CPC classification number: H04N1/053 , H04N1/1135 , H04N2201/02443 , H04N2201/04712 , H04N2201/04732 , H04N2201/04744 , H04N2201/04768 , H04N2201/0477 , H04N2201/04774 , H04N2201/04798
Abstract: A method and apparatus for synchronizing digital data for a plurality of adjacent lines of a digital image within a fraction of a pixel, comprised of a predetermined timing chain. The timing chain is divided in to a plurality of different clock chains each delayed by a predetermined increment. The plurality of different clock chains inputted to a multiplexer which later selects one of said plurality of different clock chains for use as a pixel clock. A comparator takes a consecutive portion of said plurality of different clock chains and compares them to a line start signal. The positioning of the line start signal relates to one of the plurality of different clock chains. A multiplexer sends out a clock chain based on the comparison of the comparator.
Abstract translation: 一种方法和装置，用于使数字图像的多个相邻行的数字数据在由预定的正时链组成的像素的一小部分内同步。 定时链被分成多个不同的时钟链，每个时钟链延迟预定的增量。 输入到多路复用器的多个不同的时钟链，其后选择所述多个不同时钟链中的一个用作像素时钟。 比较器接收所述多个不同时钟链的连续部分并将其与行开始信号进行比较。 行启动信号的定位与多个不同的时钟链之一有关。 多路复用器根据比较器的比较器发出时钟链。
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公开(公告)号：US10009502B2
公开(公告)日：2018-06-26
申请号：US15867798
申请日：2018-01-11
Applicant: KABUSHIKI KAISHA TOSHIBA , TOSHIBA TEC KABUSHIKI KAISHA
Inventor： Takahiro Hamanaka
CPC classification number: H04N1/295 , H04N1/0283 , H04N1/0432 , H04N2201/0081 , H04N2201/0082 , H04N2201/0477
Abstract: In accordance with an embodiment, an image forming apparatus comprises a deflector, a photoconductor, a mirror, a displacement mechanism and a control section. The deflector deflects laser light emitted from alight source to an optical path of each color in a horizontal scanning direction. The photoconductor is located in each optical path and forms an image of each color through development of an electrostatic latent image formed by being exposed by the laser light. The mirror is located in each optical path and reflects the laser light to each corresponding photoconductor. The displacement mechanism is arranged on each mirror and displaces the mirror in order to correct an inclination shift between images of respective colors. The control section corrects a magnification of the image of each color in the horizontal scanning direction according to an inclination correction amount of the image of each color.
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10.发明申请公开(公告)号：US20080285095A1
公开(公告)日：2008-11-20
申请号：US12117327
申请日：2008-05-08
Applicant: Kazuyuki Iwamoto
Inventor： Kazuyuki Iwamoto
IPC: H04N1/04
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.
Abstract translation: 扫描光学装置包括具有多个反射面的旋转多面镜。 第一光源从通过旋转多面镜的旋转轴的平面对扫描光学装置进行切片而获得的一个部分发射第一光束。 第二光源从另一部分发射第二光束。 第一计算单元计算第一光源的扫描时间。 第二计算单元计算第二光源的扫描时间。 抖动校正单元通过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。 抖动校正单元还通过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。
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