Optical reader having apparatus for discrimination between dither-matrix
and non-dither-matrix reading areas, and/or means for determining light
emitter drive power values by using reference reflector surface
    1.
    发明授权
    Optical reader having apparatus for discrimination between dither-matrix and non-dither-matrix reading areas, and/or means for determining light emitter drive power values by using reference reflector surface 失效
    具有用于辨别抖动矩阵和非抖动矩阵读取区域的装置的光学读取器和/或通过使用参考反射器表面来确定光发射器驱动功率值的装置

    公开(公告)号:US5016117A

    公开(公告)日:1991-05-14

    申请号:US285854

    申请日:1988-12-16

    IPC分类号: H04N1/40

    CPC分类号: H04N1/40062 H04N1/40056

    摘要: An optical reading including a device for effecting discrimination between a dither-matrix reading area and a non-dither-matrix reading area on a subject copy, an irradiating device for irradiating local segments of the subject copy with light beams having different intensities, a reading device for obtaining image data representative of the presence or absence of an achromatic tone in each local segment based on an amount of the light beam reflected by each local segment, a control device for operating the irradiating and reading devices to irradiate the local segments in a predetermined discriminating zone of the subject copy with the light beams having different intensities at different times, to obtain first and second image data, a device for comparing the first and second image data of each local segment in the discrimination zone, to determine whether the first and second image data agree with each other or not for each local segment, and a device for determining that the discrimination zone is the dither-matrix reading area, if a degree of disagreement of the first and second image data exceeds a predetermined reference value, and determining that the discrimination zone is the non-dither-matrix reading area, if the degree of disagreement does not exceed the reference value.

    摘要翻译: 一种光学读取装置,其特征在于,包括用于对被检体进行抖动矩阵读取区域和非抖动矩阵读取区域之间的区别的装置,照射装置,用于照射具有不同强度的光束的被检体拷贝的局部区段, 用于基于每个局部段反射的光束的量获得表示每个局部段中存在或不存在无彩色色调的图像数据的装置,用于操作照射和读取装置以照射局部区段中的局部区段的控制装置 在不同时刻具有不同强度的光束的被摄体副本的预定识别区域,以获得第一和第二图像数据;用于比较识别区域中的每个局部区段的第一和第二图像数据的装置,以确定第一和第二图像数据 并且第二图像数据彼此一致或不适用于每个本地段,以及用于确定该discri的设备 如果第一和第二图像数据的不一致程度超过预定参考值,并且确定鉴别区域是非抖动矩阵读取区域,则如果不一致程度确定 不超过参考值。

    Optical image reading apparatus capable of reading multi-colored original
    2.
    发明授权
    Optical image reading apparatus capable of reading multi-colored original 失效
    能够读取多色原版的光学图像读取装置

    公开(公告)号:US5021877A

    公开(公告)日:1991-06-04

    申请号:US260281

    申请日:1988-10-20

    IPC分类号: H04N1/028 H04N1/48 H04N1/46

    CPC分类号: H04N1/484 H04N1/0281

    摘要: An optical image reading apparatus for photoelectrically reading images formed in at least two colors on a surface of an original having a base color different from the at least two colors, including a first reading device for obtaining a first image signal for each of a multiplicity of reading spots in a predetermined area on the original. The first image signal has two different levels one of which corresponds to the base color and the other of which corresponds to the at least two colors. The apparatus further includes a second reading device for obtaining a second image signal for the each reading spot. The second image signal cooperates with the first image signal to discriminate each of the at least two colors from the other of the at least two colors. Provisions are made for determining whether the levels of the first image signals for all of the multiplicity of reading spots are equal to the above-indicated one level corresponding to the base color, or not. If so, the second reading device is inhibited from operating to obtain the second inage signal for each reading spot.

    摘要翻译: 一种光学读取装置,用于对具有不同于至少两种颜色的基本颜色的原件表面上的至少两种颜色形成的图像进行光电读取,该第一读取装置包括用于获得第一图像信号, 在原来的预定区域读取点。 第一图像信号具有两个不同的级别,一个对应于基色,另一个对应于至少两种颜色。 该装置还包括用于获得每个读取点的第二图像信号的第二读取装置。 所述第二图像信号与所述第一图像信号协作以将所述至少两种颜色中的每一种与所述至少两种颜色中的另一种进行区分。 进行用于确定所有多个读取点的第一图像信号的电平是否等于对应于基色的上述一个电平的规定。 如果是这样,则禁止第二读取装置操作以获得每个读取点的第二个入口信号。

    System for controlling rotational direction switchover and for variably
controlling rotational speed of motor
    4.
    发明授权
    System for controlling rotational direction switchover and for variably controlling rotational speed of motor 失效
    用于控制旋转方向切换和可变控制电机转速的系统

    公开(公告)号:US4295080A

    公开(公告)日:1981-10-13

    申请号:US94437

    申请日:1979-11-15

    CPC分类号: H02P7/2885 H02P7/03

    摘要: A system for controlling rotational direction switchover and for variably controlling the rotational speed of a motor comprises a circuit for switching over the rotational direction of the motor, a circuit for supplying rotation driving voltage to the motor thereby to drive it at a speed depending on the rotation driving voltage, a single voltage varying unit for varying voltage continuously, and a control signal generation circuit which receives variable voltage from the voltage varying means to generate a rotational control signal for the rotation driving voltage supplying circuit and further to generate a rotational direction switchover control signal for the switchover circuit. The voltage of the rotation control signal produced by the control signal generation circuit decreasing as the variable voltage approaches a predetermined value, reaching a minimum when the variable voltage coincides with the predetermined voltage, and increasing as the variable voltage goes beyond the predetermined value. The rotational direction switchover control signal is produced by the control signal generation circuit when the variable voltage is substantially the predetermined value.

    摘要翻译: 一种用于控制旋转方向切换和用于可变地控制马达的转速的系统包括用于切换马达的旋转方向的电路,用于向马达提供旋转驱动电压的电路,从而以一定速度驱动马达 旋转驱动电压,用于连续变化电压的单个电压变化单元,以及控制信号生成电路,其接收来自电压变化单元的可变电压,生成用于旋转驱动电压供给电路的旋转控制信号,并进一步产生旋转方向切换 切换电路的控制信号。 控制信号发生电路产生的旋转控制信号的电压随着可变电压接近预定值而减小,当可变电压与预定电压一致时达到最小,并且随着可变电压超过预定值而增加。 当可变电压基本上是预定值时,旋转方向切换控制信号由控制信号产生电路产生。

    Reproduced signal switching circuit for reproducing apparatus having
rotary heads for special reproduction
    5.
    发明授权
    Reproduced signal switching circuit for reproducing apparatus having rotary heads for special reproduction 失效
    用于具有用于特殊再现的旋转头的再现装置的再现信号切换电路

    公开(公告)号:US4630136A

    公开(公告)日:1986-12-16

    申请号:US652523

    申请日:1984-09-20

    CPC分类号: G11B15/14

    摘要: A reproduced signal switching circuit for a reproducing apparatus, comprises a switching circuit for switching output signals of rotary heads for special reproduction so as to obtain a continuous reproduced signal, a switching signal producing circuit for producing a switching signal responsive to an output pickup pulse of a rotation detecting circuit which detects the rotation of a rotary body which is mounted with the rotary heads, and for applying the switching signal to the switching circuit so as to switch the switching circuit, and a voltage supplying circuit for supplying a voltage which is in accordance with a tape moving speed to the switching signal producing circuit during the special reproduction. The switching signal producing circuit comprises time constant circuits for starting charging operations responsive to the pickup pulse, and a circuit for producing a switching signal having a polarity which changes when charged voltages in the time constant circuits reach a predetermined voltage. The voltage supplying circuit supplies the voltage to be charged to the time constant circuits.

    摘要翻译: 一种用于再现装置的再现信号切换电路,包括用于切换用于特殊再现的旋转磁头的输出信号以便获得连续再现信号的切换电路,用于响应于输出拾取脉冲产生开关信号的开关信号产生电路 旋转检测电路,其检测安装有旋转磁头的旋转体的旋转,并将开关信号施加到开关电路以切换开关电路;以及电压供应电路,用于提供电压为 根据在特殊再现期间到切换信号产生电路的磁带移动速度。 开关信号产生电路包括响应于拾取脉冲启动充电操作的时间常数电路,以及用于产生具有在时间常数电路中的充电电压达到预定电压时变化的极性的开关信号的电路。 电压供给电路将要充电的电压提供给时间常数电路。