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    • 64. 发明授权
    • Light measurement compensation device for camera
    • 相机用光测量补偿装置
    • US4552446A
    • 1985-11-12
    • US688178
    • 1985-01-02
    • Yasuo SudaKiyoshi AlyfukuAkio SunouchiNobuyuki Suzuki
    • Yasuo SudaKiyoshi AlyfukuAkio SunouchiNobuyuki Suzuki
    • G03B7/20G03B7/28G03B7/08
    • G03B7/08
    • The disclosed light measurement compensation device for a camera includes the known resistors for aperture correction and for curvature correction in order to compensate for the error of light measurement in the full open aperture light measuring mode. The device also includes a resistor for compensating for the light measuring output difference present between two light measuring modes, or partial light measuring mode and average light measuring mode, and another resistor for shifting the light measuring output by a prescribed quantity. For this reason, even though the various light measuring modes, namely, full open aperture-average light measuring, stop down-partial light measuring, full open aperture-partial light measuring, and stop down-average light measuring modes, are selectively used, either an erroneous display or a drop of the exposure accuracy seldom takes place.
    • 所公开的照相机用光测量补偿装置包括用于孔径校正和曲率校正的已知电阻器,以便补偿全开孔光测量模式中的光测量误差。 该装置还包括用于补偿存在于两个光测量模式或部分光测量模式和平均光测量模式之间的光测量输出差的电阻器,以及用于将光测量输出移位规定量的另一个电阻器。 为此,即使选择性地使用各种光测量模式,即全开孔径平均光测量,停止部分光测量,全开孔径部分光测量和停止平均光测量模式, 很少发生错误的显示或曝光精度的下降。
    • 65. 发明授权
    • Shutter time control circuit
    • 快门时间控制电路
    • US4462673A
    • 1984-07-31
    • US401701
    • 1982-07-26
    • Masanori UchidoiNobuyuki Suzuki
    • Masanori UchidoiNobuyuki Suzuki
    • G03B7/093
    • G03B7/093
    • The disclosed shutter control circuit presents a shutter time as an analog value and converts the same into a digital value by an A/D converter, then nullifies information below a prescribed step of shutter time out of thus digitally converted value for effecting shutter time control based on a digital value which is above said prescribed step. In such a type of shutter time control circuit, even when an analog value as a preset value contains a certain error, the shutter time control can be done with said error being corrected and thus it is very convenient. In this case, however, an error in a positive direction only can be corrected, and an error in a negative direction can not be corrected. The present invention has been completed in view of the above and is to provide a shutter time control circuit which can correct the above mentioned analog value or A/D converted digital value by a prescribed amount so that errors in both the positive direction and the negative direction can be corrected in the above mentioned type of shutter time control circuit.
    • 所公开的快门控制电路提供快门时间作为模拟值,并通过A / D转换器将其转换为数字值,然后使由于数字转换的值的规定的快门时间步长以下的信息无效,以进行快门时间控制 在高于所述规定步骤的数字值上。 在这种类型的快门时间控制电路中,即使作为预设值的模拟值包含特定误差,也可以在校正所述误差的情况下进行快门时间控制,因此非常方便。 然而,在这种情况下,仅能够校正正方向的误差,不能校正负方向的误差。 鉴于上述问题,本发明是完成的,其目的是提供一种快门时间控制电路,其能够将上述模拟值或A / D转换数字值校正规定量,使正方向和负方向的误差 可以在上述类型的快门时间控制电路中校正方向。
    • 69. 发明授权
    • Deflection circuit for a picture tube
    • 偏转电路用于显像管
    • US4215295A
    • 1980-07-29
    • US940008
    • 1978-09-06
    • Fumio InoueNobuyuki Suzuki
    • Fumio InoueNobuyuki Suzuki
    • H04N3/22H03K4/72H01J29/70H01J29/76
    • H03K4/725
    • A sawtooth wave generated in a sawtooth wave generator circuit of a vertical deflection circuit assumes a predetermined maximum voltage at the start of a vertical scan and a minimum voltage which changes depending on a vertical cycle period at the end of the vertical scan. A pulse generator generates a sampling pulse at the end of the vertical scan so that the sawtooth wave voltage at the end of the vertical scan is sampled by the sampling pulse. The sampled sawtooth wave is held until a next sampling pulse is generated so that a D.C. voltage which changes in accordance with the vertical cycle period is produced. The sawtooth wave voltage is level-shifted by a level shifting circuit and thereafter amplified before it is supplied to a vertical deflection coil. The amount of shift by the level shifting circuit is controlled by the D.C. voltage so that the sawtooth wave having a stabilized D.C. component is amplified. Accordingly, a vertical deflection circuit free from D.C. component variation can be derived and the swing of image can be suppressed.
    • 在垂直偏转电路的锯齿波发生器电路中产生的锯齿波在垂直扫描开始时呈现预定的最大电压,并且根据在垂直扫描结束时的垂直周期周期而变化的最小电压。 脉冲发生器在垂直扫描结束时产生采样脉冲,使垂直扫描结束时的锯齿波电压由取样脉冲采样。 采样的锯齿波被保持直到产生下一个采样脉冲,从而产生根据垂直周期周期变化的直流电压。 锯齿波电压通过电平移位电路进行电平移位,然后在提供给垂直偏转线圈之前被放大。 由电平移位电路的移位量由直流电压控制,使得具有稳定的直流分量的锯齿波被放大。 因此,可以导出没有D.C.分量变化的垂直偏转电路,并且可以抑制图像的摆动。