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    Imaging reading apparatus having a preheating system
    1.
    发明授权
    Imaging reading apparatus having a preheating system 失效
    具有预热系统的成像读取装置

    公开(公告)号：US5140445A

    公开(公告)日：1992-08-18

    申请号：US533849

    申请日：1990-06-06

    申请人： Izumi Takashima ,  Shinichiro Taga ,  Mitsuo Ohtaki

    发明人： Izumi Takashima ,  Shinichiro Taga ,  Mitsuo Ohtaki

    IPC分类号： G03B27/50 ,  H04N1/00 ,  H04N1/028 ,  H04N1/19

    CPC分类号： H04N1/00885 ,  H04N1/00891 ,  H04N1/00896 ,  H04N1/00912

    摘要： An image sensor is operable in a read state, a rest state, and a stand-by state. Control signal generating means generate a control signal. The control signal has a first constant preset level during the read state, a second preset level during the rest state, and alternates between the first and second levels at a duty ratio during the stand-by state. Drive circuit means transfer current to the image sensor in response to the control signal. Therefore, current is continuously transferred to the image sensor during the read state, no current is transferred during the rest state, and current is intermittently transferred to the image sensor at the duty ratio during the stand-by state.

    摘要翻译： 图像传感器在读取状态，休止状态和待机状态下可操作。 控制信号发生装置产生控制信号。 控制信号在读取状态期间具有第一恒定的预设电平，在休止状态期间具有第二预设电平，并且在待机状态期间以占空比在第一和第二电平之间交替。 驱动电路意味着响应于控制信号将电流传送到图像传感器。 因此，在读取状态期间电流被连续传送到图像传感器，在静止状态期间不传输电流，并且在待机状态下以占空比将电流间歇地传送到图像传感器。

    Image reading apparatus
    3.
    发明授权
    Image reading apparatus 失效
    图像读取装置

    公开(公告)号：US5189528A

    公开(公告)日：1993-02-23

    申请号：US408390

    申请日：1989-09-18

    申请人： Izumi Takashima ,  Yoshiya Imoto ,  Shinichiro Taga ,  Mitsuo Shimizu

    发明人： Izumi Takashima ,  Yoshiya Imoto ,  Shinichiro Taga ,  Mitsuo Shimizu

    IPC分类号： G06T1/00 ,  H04N1/407

    CPC分类号： H04N1/4076 ,  H04N5/361 ,  H04N5/3653 ,  H04N5/3692

    摘要： An image reading apparatus with a plurality of line sensors comprises a reference level adjusting circuit for adjusting a level of a dark output outputted from one of the line sensors to a reference level, and a level difference adjusting circuit for progressively adjusting to a minimum a dark output level difference between the reference level adjusted line sensor and a second line sensor adjacent to the former sensor, a dark output level difference between the second line sensor and a third line sensor adjacent to the second line sensor, and so on. When three or more line sensors are used, a level of a dark output outputted from one of the three line sensors which is located at the center of a sensor array of the three sensors is adjusted to the reference level. Alternatively, a level of a dark output outputted from one of three line sensors which is located at one of the ends of a sensor array of the three line sensors is adjusted to the reference level. With such an arrangement, even when a linear array of a plurality of line sensors is used, the resultant image is free from lines and stripes or density irregularity, because the level differences at the channel boundary levels are adjusted to be zeroed.

    摘要翻译： 具有多个线传感器的图像读取装置包括：基准电平调整电路，用于将从一个线路传感器输出的暗输出的电平调整为参考电平;以及电平差调整电路，用于逐渐调节至最小的黑暗 基准电平调节线传感器与与前一传感器相邻的第二线传感器之间的输出电平差，第二线传感器与第二线传感器相邻的第三线传感器之间的暗输出电平差等。 当使用三个或更多个线传感器时，从位于三个传感器的传感器阵列的中心的三个线传感器中的一个输出的暗输出的电平被调整到参考电平。 或者，将位于三行传感器的传感器阵列的一端的三个线传感器之一输出的暗输出的电平调整到参考电平。 通过这样的布置，即使使用多个线传感器的线阵列，由于将通道边界电平的电平差调整为零，所以得到的图像没有线条和条纹或密度不均匀。