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    • 7. 发明授权
    • Imaging device for an image reading apparatus, and image reading method
    • 用于图像读取装置的成像装置和图像读取方法
    • US08947753B2
    • 2015-02-03
    • US13845532
    • 2013-03-18
    • Masahiro Hiranuma
    • Masahiro Hiranuma
    • H04N1/46H04N1/48
    • H04N1/48
    • An imaging device includes a plurality of light-receiving units configured to perform photoelectric conversion for different colors, respectively, each light light-receiving unit including a plurality of pixels; a plurality of output units provided for the light-receiving units, each output unit sequentially converting charges of the respective pixels produced by the photoelectric conversion into voltages and sequentially outputting the voltages; a switching unit configured to switch between signal paths so as to alternate output of the voltage between the output units in accordance with a switching signal input from an external device; and an electric-potential applying unit configured to apply an offset potential to the voltages output by the output units until a predetermined time has elapsed since switching between the signal paths by the switching unit.
    • 一种成像装置包括:多个光接收单元,分别被配置为对不同颜色进行光电转换,每个光接收单元包括多个像素; 为光接收单元设置的多个输出单元,每个输出单元将通过光电转换产生的各个像素的电荷顺序地转换为电压并顺序地输出电压; 开关单元,被配置为在信号路径之间切换,以便根据从外部设备输入的切换信号,在输出单元之间交替输出电压; 以及电位施加单元,被配置为对由输出单元输出的电压施加偏移电位,直到由切换单元在信号路径之间切换而经过预定时间。
    • 8. 发明授权
    • Image reading apparatus, image processing apparatus, and computer program product
    • 图像读取装置,图像处理装置和计算机程序产品
    • US07936485B2
    • 2011-05-03
    • US11562235
    • 2006-11-21
    • Masahiro Hiranuma
    • Masahiro Hiranuma
    • H04N1/40
    • H04N1/4076
    • An image reading apparatus includes a clamp-ratio controlling unit configured to change at least one of a clamp period and a line period for each read operation mode, wherein the clamp-ratio setting unit provides a control so that a clamp ratio that is a ratio between the clamp period and the line period is constant through all read operation modes. The clamp period is a period for performing clamp processing for setting a black level to a constant, which is an absolute black reference of an analog image signal output according to a quantity of light at a time of receiving reflected light from a document, and the line period is a read period of one line in the sub scanning direction.
    • 图像读取装置包括钳位比控制单元,被配置为针对每个读取操作模式改变钳位周期和行期间中的至少一个,其中钳位比设置单元提供控制,使得作为比率的钳位比 在所有读操作模式之间,钳位周期与线周期之间是恒定的。 钳位期间是用于进行用于将黑电平设定为常数的钳位处理的周期,该常数是根据从文档接收反射光时的光量输出的模拟图像信号的绝对黑色参考, 行周期是副扫描方向上一行的读取周期。