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    • 3. 发明授权
    • Image data reading apparatus
    • 图像数据读取装置
    • US5214520A
    • 1993-05-25
    • US617809
    • 1990-11-26
    • Hideyuki Miyazawa
    • Hideyuki Miyazawa
    • H04N1/04H04N1/401H04N1/407
    • H04N1/4076
    • An image data reading apparatus is provided, comprising a transport part for transporting an original sheet to a reading position within the image data reading apparatus, a white reference plate provided at the reading position, a light source for generating a light projected to the reading position, a light receiving part for converting an incoming light reflected from the white reference plate into a white reference signal and for converting an incoming light reflected from the original sheet into an image signal, a correction part for eliminating a shading from the image signal based on a reference voltage, a peak level holding part for detecting and storing a peak level of a corrected signal from the correction part, a quantization part for converting an incoming signal from the correction part into digital information based on the peak level, and a switching part for turning the peak level holding part off to stop detection and storing of the peak level of the incoming signal for a prescribed time period between a time the white reference signal is received by the light receiving part from the white reference plate and at a time the original sheet is transported to the reading position, so that the peak level holding part receives no signal from the light receiving part during the prescribed time period.
    • 提供了一种图像数据读取装置,包括用于将原稿片材传送到图像数据读取装置内的读取位置的传送部件,设置在读取位置的白色基准板,产生投影到读取位置的光的光源 ,用于将从白色参考板反射的入射光转换为白色参考信号并将从原始片反射的入射光转换成图像信号的光接收部分,用于基于图像信号消除阴影的校正部分 参考电压,用于检测和存储来自校正部分的校正信号的峰值电平的峰值电平保持部分,用于基于峰值电平将来自校正部分的输入信号转换成数字信息的量化部分,以及切换部分 用于使峰值电平保持部分关闭以停止检测并存储输入信号的峰值电平 从白色基准板接受白色参考信号的时间与原稿被传送到读取位置之间的规定时间段,使得峰值电平保持部分不接收来自光的信号 在规定的时间内接收部分。
    • 6. 发明授权
    • Image reader for image processing apparatus
    • 图像处理设备的图像读取器
    • US4646155A
    • 1987-02-24
    • US756314
    • 1985-07-18
    • Hideyuki MiyazawaEiji Kamizyo
    • Hideyuki MiyazawaEiji Kamizyo
    • H04N1/193H04N1/40H04N3/14
    • H04N1/1931H04N1/40056
    • An image reader in which a plurality of light-sensitive cells arranged in an array in a line image sensor are divided into a predetermined number of blocks, and the blocks are sequentially selected to sequentially drive the light-sensitive cells in each of the blocks to produce image signals. Charging switches are provided for charging the light-sensitive cells via block selector switches. The charging switches are activated after a signal read time assigned to each light-sensitive cell has expired to thereby shorten the charging time necessary for the light-sensitive cell. The block selector switches are each actuated at a predetermined timing while the charging switches are activated, thereby preventing noise due to switching actions of the block selector switches from being introduced into image signals.
    • 其中以线阵图像传感器排列成阵列的多个感光单元被分成预定数量的块的图像读取器,并且顺序选择块以顺序地驱动每个块中的感光单元到 产生图像信号。 提供充电开关,用于通过块选择器开关对感光单元充电。 在分配给每个感光单元的信号读取时间已经期满之后,充电开关被激活,从而缩短感光单元所需的充电时间。 在充电开关被激活的同时,块选择器开关各自被激活,从而防止由块选择器开关的切换动作引起的图像信号引起的噪声。