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    • 3. 发明授权
    • Image reading device, image reading method, and image forming apparatus for correcting digital image signal using modulated reference signal
    • 图像读取装置,图像读取方法以及使用调制参考信号校正数字图像信号的图像形成装置
    • US08451505B2
    • 2013-05-28
    • US12719246
    • 2010-03-08
    • Masaki NagaseTohru Kanno
    • Masaki NagaseTohru Kanno
    • G06T5/00
    • H04N1/40062G06T5/002G06T2207/10008
    • A reference-signal generating unit generates a reference signal for generating a driving signal to drive other units of the image reading device. A frequency modulating unit modulates frequency of the reference signal, thereby generating a frequency-modulated reference signal. A driving-signal generating unit generates the driving signal from the frequency-modulated reference signal. A photoelectric converting unit converts an incident light into an analog image signal using the driving signal. An AD converting unit converts the analog image signal into a digital image signal. A correcting unit corrects the digital image signal by generating a correction signal for eliminating a noise superimposed on the digital image signal using the frequency-modulated reference signal and adding the correction signal to the digital image signal.
    • 参考信号产生单元产生用于产生驱动信号以驱动图像读取装置的其它单元的参考信号。 频率调制单元调制参考信号的频率,从而生成调频参考信号。 驱动信号生成单元从调频参考信号生成驱动信号。 光电转换单元使用驱动信号将入射光转换为模拟图像信号。 AD转换单元将模拟图像信号转换为数字图像信号。 校正单元通过使用调频参考信号产生用于消除叠加在数字图像信号上的噪声的校正信号来校正数字图像信号,并将校正信号加到数字图像信号上。
    • 4. 发明授权
    • Image reading device and image forming device
    • 图像读取装置和图像形成装置
    • US08102574B2
    • 2012-01-24
    • US12041196
    • 2008-03-03
    • Masaki Nagase
    • Masaki Nagase
    • H04N1/40H04N1/04
    • H04N1/486H04N5/2176H04N5/361
    • An image reading device includes a processing circuit having a clamp unit that matches an offset potential of an inputted analog image signal to a predetermined value, a processing unit that subjects an analog image signal obtained from the clamp unit to analog processing, and a converting unit that converts a processed analog image signal to a digital image signal. A control unit for controlling the processing circuit includes a switching unit that switches a main scanning line period of a charge coupled device and outputs analog image signals using a number of reading speeds, and a changing unit that changes a clamp period depending on the main scanning line period.
    • 一种图像读取装置包括具有将输入的模拟图像信号的偏移电位与预定值相匹配的钳位单元的处理电路,对从钳位单元获得的模拟图像信号进行模拟处理的处理单元,以及转换单元 其将经处理的模拟图像信号转换为数字图像信号。 用于控制处理电路的控制单元包括切换单元,其切换电荷耦合器件的主扫描线周期并使用多个读取速度输出模拟图像信号;以及改变单元,其根据主扫描改变钳位周期 行期。
    • 6. 发明申请
    • IMAGE READING DEVICE AND IMAGE READING METHOD
    • 图像读取装置和图像读取方法
    • US20080297616A1
    • 2008-12-04
    • US12119941
    • 2008-05-13
    • Masaki NagaseTohru Kanno
    • Masaki NagaseTohru Kanno
    • H04N5/228
    • H04N5/3692H04N1/1013H04N1/193H04N1/40056
    • In an image reading device, a sampling-and-holding circuit generates a plurality of analog image signals by sampling an image signal at each sampling-and-holding timing and holding sampled image signals for a predetermined amount of time, an analog-to-digital converting unit converts the analog image signals into a plurality of digital image signals at each sampling-and-holding timing, a phase regulating unit performs phase regulation of each sampling-and-holding timing based on corresponding digital image signals to obtain phase-regulated sampling-and-holding timing. The sampling-and-holding circuit generates the analog image signal at each phase-regulated sampling-and-holding timing.
    • 在图像读取装置中,采样和保持电路通过在每个采​​样和保持定时对图像信号进行采样而产生多个模拟图像信号,并将采样的图像信号保持预定的时间量,模拟 - 数字转换单元在每个采样和保持定时将模拟图像信号转换成多个数字图像信号,相位调节单元基于相应的数字图像信号执行每个采样和保持定时的相位调节,以获得相位调节 采样和保持定时。 采样和保持电路在每个相位调节的采样和保持定时产生模拟图像信号。
    • 7. 发明申请
    • PHOTOELECTRIC CONVERSION ELEMENT, IMAGE READING DEVICE, IMAGE FORMING APPARATUS, AND IMAGE READING METHOD
    • 光电转换元件,图像读取装置,图像形成装置和图像读取方法
    • US20150304517A1
    • 2015-10-22
    • US14789600
    • 2015-07-01
    • Masamoto NAKAZAWAMasaki NAGASE
    • Masamoto NAKAZAWAMasaki NAGASE
    • H04N1/028H04N1/10
    • H04N1/02815H04N1/0473H04N1/1013H04N1/1039
    • A photoelectric conversion element includes: a plurality of light receiving elements that are arranged in a main-scanning direction, are arranged in a sub-scanning direction according to colors of light to be received, and accumulates electric charge due to light exposure; and a plurality of AD conversion units that convert analog signals that indicate quantities of electric charge accumulated in the light receiving elements into digital signals are provide for each of groups each consisting of a predetermined number of pixels corresponding to the light receiving elements arranged in the sub-scanning direction. The AD conversion units convert the analog signals into the digital signals in an order in which the light receiving elements in the group are exposed to light. The light receiving elements constitute a correction unit that performs correction so as to reduce a difference relating to the timings in the sub-scanning direction.
    • 光电转换元件包括:沿主扫描方向布置的多个光接收元件,按照要接收的光的颜色在副扫描方向上排列,并且由于曝光而积累电荷; 将表示在光接收元件中累积的电荷量的模拟信号转换为数字信号的多个AD转换单元,分别对应于配置在子信号中的受光元件的规定数量的像素构成 扫描方向。 AD转换单元按照组中的光接收元件暴露于光的顺序将模拟信号转换成数字信号。 光接收元件构成校正单元,其执行校正,以减少与副扫描方向上的定时有关的差异。
    • 10. 发明申请
    • IMAGE READING DEVICE AND IMAGE FORMING DEVICE
    • 图像读取装置和图像形成装置
    • US20080231918A1
    • 2008-09-25
    • US12041196
    • 2008-03-03
    • Masaki NAGASE
    • Masaki NAGASE
    • H04N1/04
    • H04N1/486H04N5/2176H04N5/361
    • An image reading device includes a processing circuit having a clamp unit that matches an offset potential of an inputted analog image signal to a predetermined value, a processing unit that subjects an analog image signal obtained from the clamp unit to analog processing, and a converting unit that converts a processed analog image signal to a digital image signal. A control unit for controlling the processing circuit includes a switching unit that switches a main scanning line period of a charge coupled device and outputs analog image signals using a number of reading speeds, and a changing unit that changes a clamp period depending on the main scanning line period.
    • 一种图像读取装置包括具有将输入的模拟图像信号的偏移电位与预定值相匹配的钳位单元的处理电路,对从钳位单元获得的模拟图像信号进行模拟处理的处理单元,以及转换单元 其将经处理的模拟图像信号转换为数字图像信号。 用于控制处理电路的控制单元包括切换单元,其切换电荷耦合器件的主扫描线周期并使用多个读取速度输出模拟图像信号;以及改变单元,其根据主扫描改变钳位周期 行期。