公开(公告)号：US20080100888A1

公开(公告)日：2008-05-01

申请号：US11926933

申请日：2007-10-29

Applicant: Hideaki NAGASAKA

Inventor： Hideaki NAGASAKA

IPC: H04N1/50

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

Abstract translation: 图像读取装置包括时钟发生器，图像传感器，具有第一开关和第二开关的多个开关，读取器，第一控制器和第二控制器。 时钟发生器产生具有第一周期的第一时钟信号和具有比第一周期短的第二周期的第二时钟信号。 图像传感器检测在文档上形成的图像以产生图像信号。 图像信号通过旋转输入到第一开关和第二开关。 第一开关和第二开关能够切换以与第一时钟同步地同时或交替地输出图像信号。 读取器读取从第一开关和第二开关输出的图像信号。 第一控制器控制第一开关以在第一时段期间将图像信号输出到读取器，并且在第二周期期间控制第二开关以将图像信号输出到读取器。 第二控制器控制时钟发生器以在第一周期和第二周期期间产生第一时钟信号，并且在第一周期和第二周期之间的第三周期期间产生第二时钟信号，并且长于预定周期 mT并且短于（kxT1）T1是第一个周期。 k是满足mT <（kxT1）的最小整数。

公开(公告)号：US09900461B2

公开(公告)日：2018-02-20

申请号：US15407359

申请日：2017-01-17

Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA TEC KABUSHIKI KAISHA

Inventor： Takahiro Hamanaka

IPC: H04N1/04 ,  H04N1/29 ,  H04N1/028

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 a light 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.

公开(公告)号：US20170214818A1

公开(公告)日：2017-07-27

申请号：US15407359

申请日：2017-01-17

Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA TEC KABUSHIKI KAISHA

Inventor： Takahiro Hamanaka

IPC: H04N1/29 ,  H04N1/04 ,  H04N1/028

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 a light 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.

公开(公告)号：US20110228029A1

公开(公告)日：2011-09-22

申请号：US13046893

申请日：2011-03-14

Applicant: Tatsuya MIYADERA ,  Masayuki Hayashi ,  Yoshinori Shirasaki

Inventor： Tatsuya MIYADERA ,  Masayuki Hayashi ,  Yoshinori Shirasaki

IPC: B41J2/385 ,  B41J2/435

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。

公开(公告)号：US20180139348A1

公开(公告)日：2018-05-17

申请号：US15867798

申请日：2018-01-11

Applicant: Kabushiki Kaisha Toshiba ,  Toshiba Tec Kabushiki Kaisha

Inventor： Takahiro Hamanaka

IPC: H04N1/29 ,  H04N1/04 ,  H04N1/028

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 a light 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.

公开(公告)号：US08310738B2

公开(公告)日：2012-11-13

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。

公开(公告)号：US07916364B2

公开(公告)日：2011-03-29

申请号：US11926933

申请日：2007-10-29

Applicant: Hideaki Nagasaka

Inventor： Hideaki Nagasaka

IPC: H04N1/46

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

Abstract translation: 图像读取装置包括时钟发生器，图像传感器，具有第一开关和第二开关的多个开关，读取器，第一控制器和第二控制器。 时钟发生器产生具有第一周期的第一时钟信号和具有比第一周期短的第二周期的第二时钟信号。 图像传感器检测在文档上形成的图像以产生图像信号。 图像信号通过旋转输入到第一开关和第二开关。 第一开关和第二开关能够切换以与第一时钟同步地同时或交替地输出图像信号。 读取器读取从第一开关和第二开关输出的图像信号。 第一控制器控制第一开关以在第一时段期间将图像信号输出到读取器，并且在第二周期期间控制第二开关以将图像信号输出到读取器。 第二控制器控制时钟发生器以在第一周期和第二周期期间产生第一时钟信号，并且在第一周期和第二周期之间的第三周期期间产生第二时钟信号，并且长于预定周期 mT并且短于（k×T1）T1是第一个周期。 k是满足mT <（k×T1）的最小整数。

公开(公告)号：US20070170258A1

公开(公告)日：2007-07-26

申请号：US11655974

申请日：2007-01-22

Applicant: Yoshinobu Kagami

Inventor： Yoshinobu Kagami

IPC: G06K7/10

CPC classification number: H04N1/047 ,  H04N1/00994 ,  H04N2201/0477

Abstract: A frequency of an original clock signal is spread based on a spread spectrum width thereby generating a real clock signal, and a timing signal is generated based on the real clock signal. Noise in the timing signal is reduced in a plurality of harmonic noise reduction stages to thereby obtain a noise-reduced timing signal. An optical image obtained by scanning a document is converted into an electric signal based on the noise-reduced timing signal. The spread spectrum width to be used when spreading frequency of an original clock signal, and number of the harmonic noise reduction stages to be used when reducing noise in the timing signal are changed depending on an operation mode.

Abstract translation: 原始时钟信号的频率基于扩频宽度扩展，从而产生实时时钟信号，并且基于实时时钟信号产生定时信号。 在多个谐波降噪级中降低定时信号中的噪声，从而获得噪声降低的定时信号。 通过扫描文档获得的光学图像被转换成基于噪声降低的定时信号的电信号。 当根据操作模式改变在原始时钟信号的扩展频率时使用的扩展频谱宽度以及在降低定时信号中的噪声时要使用的谐波降噪级的数量。

公开(公告)号：JP2008118214A

公开(公告)日：2008-05-22

申请号：JP2006297118

申请日：2006-10-31

Applicant: Brother Ind Ltd ,  ブラザー工業株式会社

Inventor： NAGASAKA HIDEAKI

IPC: H04N1/028 ,  H04N1/19

CPC classification number: H04N1/12 ,  H04N1/00689 ,  H04N2201/0454 ,  H04N2201/04748 ,  H04N2201/0477

Abstract: PROBLEM TO BE SOLVED: To provide an image reader capable of speeding up read.
SOLUTION: The outputs of AFEs 42, 43 are changed in the period of fourth and eighth clocks. When a third clock is completed, the chip selection of the AFE 42 is changed from a low level to a high level and the output of the AFE 42 is set to be in high impedance. The chip selection of the AFE 43 is changed from a high level to a low level, upper 8 bits of a fourth channel are outputted in the high level period of a fifth clock, and lower 8 bits are outputted in a low period. Similarly, fifth and sixth channels are outputted in sixth and seventh clock periods, respectively, and the AFE 43 is changed to the AFE 42 again in an eighth clock. A time period during the change is performed lasts 40 ns and is set to time shorter than a period of 60 ns when a digital signal is outputted form the AFEs 42, 43.
COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：提供能够加速读取的图像读取器。 解决方案：AFE42,43的输出在第四和第八时钟的周期内改变。 当第三时钟完成时，AFE42的芯片选择从低电平变为高电平，并且AFE 42的输出被设置为高阻抗。 AFE43的芯片选择从高电平变为低电平，在第五时钟的高电平期间输出第四通道的高8位，低电平周期输出低8位。 类似地，在第六和第七时钟周期分别输出第五和第六通道，并且在第八时钟再次将AFE 43改变为AFE 42。 改变期间的时间段持续40ns，并且当从AFE42,43输出数字信号时，设定为短于60ns的时间的时间。（C）2008，JPO＆INPIT

公开(公告)号：JP4678861B2

公开(公告)日：2011-04-27

申请号：JP2006017679

申请日：2006-01-26

Applicant: 株式会社リコー

Inventor： 宜伸 加賀美

IPC: H04N1/19 ,  H04N1/028

CPC classification number: H04N1/047 ,  H04N1/00994 ,  H04N2201/0477

Abstract: A frequency of an original clock signal is spread based on a spread spectrum width thereby generating a real clock signal, and a timing signal is generated based on the real clock signal. Noise in the timing signal is reduced in a plurality of harmonic noise reduction stages to thereby obtain a noise-reduced timing signal. An optical image obtained by scanning a document is converted into an electric signal based on the noise-reduced timing signal. The spread spectrum width to be used when spreading frequency of an original clock signal, and number of the harmonic noise reduction stages to be used when reducing noise in the timing signal are changed depending on an operation mode.