公开(公告)号：US09025216B2

公开(公告)日：2015-05-05

申请号：US14138791

申请日：2013-12-23

申请人： Hideki Hashimoto ,  Masamoto Nakazawa

发明人： Hideki Hashimoto ,  Masamoto Nakazawa

IPC分类号： H04N1/04 ,  H04N1/00 ,  H04N1/32

CPC分类号： H04N1/00798 ,  H04N1/00933 ,  H04N1/32475 ,  H04N2201/0081

摘要： An image reading apparatus includes: light-receiving elements arranged in a main-scanning direction to perform photoelectric conversion pixel by pixel; AD converter units that convert each piece of analog data photoelectric-converted by the light-receiving elements into parallel pieces of digital data; a storage unit that stores therein each of the digital data converted by the AD converter units; a converter unit that reads the digital data stored in the storage unit and converts the read digital data into serial data in the main-scanning direction; a readout control unit that changeably controls a readout start pixel and a readout end pixel of the serial data in the main-scanning direction; and a period change unit that changes a period in which the converter unit converts digital data into serial data in the main-scanning direction based on the readout start pixel and the readout end pixel.

摘要翻译： 图像读取装置包括：以主扫描方向布置的光接收元件，逐像素地执行光电转换; AD转换器单元，将由光接收元件光电转换的每个模拟数据转换为数字数据的并行; 存储单元，其中存储由AD转换器单元转换的数字数据的每个; 转换器单元，读取存储在存储单元中的数字数据，并将读取的数字数据转换成主扫描方向的串行数据; 读出控制单元，其可变地控制主扫描方向上的串行数据的读出开始像素和读出端像素; 以及周期改变单元，其改变转换器单元基于读出的开始像素和读出端像素将数字数据转换成主扫描方向上的串行数据的周期。

公开(公告)号：US08908245B2

公开(公告)日：2014-12-09

申请号：US13912341

申请日：2013-06-07

申请人： Masamoto Nakazawa

发明人： Masamoto Nakazawa

IPC分类号： G03F3/08 ,  H04N1/46 ,  H04N9/64 ,  H04N1/407

CPC分类号： H04N1/407 ,  H04N1/40056

摘要： According to an embodiment, an image scanning device includes: a light source unit that emits light onto an original to be scanned; a photoelectric conversion unit that converts light from the original to an electric signal; a converting unit that converts the electric signal from the photoelectric conversion unit into digital image data; and a black correcting unit that performs black correction by correcting pixel-by-pixel black levels of pixels contained in pre-scanning digital image data obtained before the original is scanned based on a ratio of a dark-current black level of a pixel contained in ongoing-scanning digital image data obtained during scanning of the original to a dark-current black level of the pixel contained in the pre-scanning digital image data, and subtracting the corrected pixel-by-pixel black levels from the ongoing-scanning digital image data.

摘要翻译： 根据一个实施例，图像扫描装置包括：光源单元，其将光发射到待扫描的原稿上; 将来自原稿的光转换为电信号的光电转换单元; 转换单元，其将来自光电转换单元的电信号转换为数字图像数据; 以及黑色校正单元，其通过基于包含在扫描原稿中的像素的暗电流黑电平的比例来校正在扫描原稿之前获得的预扫描数字图像数据中包含的像素的逐像素黑色电平来执行黑色校正 将原稿扫描期间获得的持续扫描数字图像数据包含在预扫描数字图像数据中的像素的暗电流黑电平，以及从正扫描数字图像中减去校正的逐像素黑电平 数据。

公开(公告)号：US08797606B2

公开(公告)日：2014-08-05

申请号：US12850133

申请日：2010-08-04

申请人： Hideki Hashimoto ,  Masamoto Nakazawa

发明人： Hideki Hashimoto ,  Masamoto Nakazawa

IPC分类号： H04N1/40 ,  H04N1/04 ,  H04N5/372

CPC分类号： H04N5/3692 ,  H04N5/372 ,  H04N5/3765

摘要： The photoelectric conversion device includes a photoelectric conversion element configured to convert light reflected from an original image to electrical signals and a clock generator configured to generate driving signals for driving the photoelectric conversion element from a reference clock. Each of the driving signals is generated using the same logic gate or substantially the same logic gate.

摘要翻译： 光电转换装置包括被配置为将从原始图像反射的光转换为电信号的光电转换元件和被配置为产生用于从参考时钟驱动光电转换元件的驱动信号的时钟发生器。 每个驱动信号使用相同的逻辑门或基本上相同的逻辑门产生。

公开(公告)号：US08749276B2

公开(公告)日：2014-06-10

申请号：US13251548

申请日：2011-10-03

申请人： Masamoto Nakazawa

发明人： Masamoto Nakazawa

IPC分类号： H03L5/00

CPC分类号： H04N1/193 ,  H04N1/00928 ,  H04N1/1013 ,  H04N5/372 ,  H04N2201/0081

摘要： A signal buffer circuit includes a buffer to conduct a buffering operation for transmitting a signal to a subsequent unit; a resistor connected between an input side and an output side of the buffer; and a variable impedance device connected in series to the output side of the buffer. The variable impedance device is at low impedance when the buffer is conducting the buffering operation and at high impedance when the buffer is not conducting the buffering operation.

摘要翻译： 信号缓冲电路包括缓冲器，用于进行用于将信号发送到后续单元的缓冲操作; 连接在缓冲器的输入侧和输出侧之间的电阻器; 以及与缓冲器的输出侧串联连接的可变阻抗器件。 当缓冲器进行缓冲操作并且当缓冲器不进行缓冲操作时，可变阻抗器件处于低阻抗。

公开(公告)号：US08472091B2

公开(公告)日：2013-06-25

申请号：US12640646

申请日：2009-12-17

申请人： Masamoto Nakazawa

发明人： Masamoto Nakazawa

IPC分类号： H04N1/04

CPC分类号： H04N1/32 ,  H04N1/00933 ,  H04N1/1013 ,  H04N1/193 ,  H04N1/40056 ,  H04N2201/0081

摘要： A scanner includes: a photoelectric conversion element configured to photoelectrically convert light reflected from an original image to form an image signal; a timing generation circuit configured to generate a drive signal for the photoelectric conversion element; a drive circuit configured to drive the photoelectric conversion element; a signal processing circuit configured to subject a sample hold signal fed in through the drive circuit and the image signal to an A/D conversion; and a control circuit configured to turn on the sample hold signal when the scanner transitions to an “ON” state from an “OFF” state and turn off the sample hold signal when the scanner transitions to the “OFF” state from the “ON” state. The control circuit turns on and off the sample hold signal, based on each of input fed to the drive circuit and the signal processing circuit.

摘要翻译： 扫描仪包括：光电转换元件，被配置为光电转换从原始图像反射的光以形成图像信号; 定时产生电路，被配置为产生用于所述光电转换元件的驱动信号; 配置为驱动所述光电转换元件的驱动电路; 信号处理电路，被配置为将通过驱动电路馈送的采样保持信号和图像信号进行A / D转换; 以及控制电路，被配置为当扫描仪从“OFF”状态转变到“ON”状态时接通采样保持信号，并且当扫描仪从“ON”转变到“OFF”状态时关闭采样保持信号， 州。 控制电路基于馈送到驱动电路和信号处理电路的每个输入端接通和关断采样保持信号。

公开(公告)号：US08248669B2

公开(公告)日：2012-08-21

申请号：US12508906

申请日：2009-07-24

申请人： Masamoto Nakazawa

发明人： Masamoto Nakazawa

IPC分类号： H04N1/40

CPC分类号： H04N5/3765 ,  H04N5/3577

摘要： An image reading device includes a charge-coupled device that generates and outputs an image signal, a timing generator that outputs a frequency-modulated clock, a modulation signal detector that detects a modulation signal being a signal corresponding to a change in frequency of the clock, an amplitude controller that controls an amplitude of the modulation signal, and a signal combining unit that superimposes the modulation signal after the amplitude is controlled on the image signal.

摘要翻译： 图像读取装置包括产生并输出图像信号的电荷耦合器件，输出调频时钟的定时发生器，检测作为对应于时钟频率变化的信号的调制信号的调制信号检测器 控制调制信号的幅度的幅度控制器，以及在将幅度控制在图像信号上之后叠加调制信号的信号组合单元。

公开(公告)号：US20120008173A1

公开(公告)日：2012-01-12

申请号：US13150563

申请日：2011-06-01

申请人： Yoshio KONNO ,  Masamoto Nakazawa

发明人： Yoshio KONNO ,  Masamoto Nakazawa

IPC分类号： H04N1/32

CPC分类号： H04N1/193 ,  H04N1/1013 ,  H04N2201/0081

摘要： The analog signal buffer is connected with a photoelectric converter to convert an optical image to an analog signal and an analog signal processing circuit to convert the analog signal to a digital signal, and transmits the analog signal to the analog signal processing circuit. The analog signal buffer includes a first buffer having a NPN transistor; and a second buffer having a PNP transistor. The first buffer includes a circuit to block a reverse current caused in the analog signal buffer by dropping of a voltage output from the photoelectric converter.

摘要翻译： 模拟信号缓冲器与光电转换器连接，将光学图像转换为模拟信号和模拟信号处理电路，将模拟信号转换为数字信号，并将模拟信号发送到模拟信号处理电路。 模拟信号缓冲器包括具有NPN晶体管的第一缓冲器; 以及具有PNP晶体管的第二缓冲器。 第一缓冲器包括一个电路，用于通过掉电从光电转换器输出的电压来阻止在模拟信号缓冲器中产生的反向电流。