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公开(公告)号：US4089011A
公开(公告)日：1978-05-09
申请号：US737345
申请日：1976-11-01
申请人： Nobuaki Date , Yoshiaki Watanabe , Akio Sunouchi , Yukio Mashimo , Fumio Ito , Tadashi Ito
发明人： Nobuaki Date , Yoshiaki Watanabe , Akio Sunouchi , Yukio Mashimo , Fumio Ito , Tadashi Ito
摘要： The present invention relates to an exposure information setting device for a camera having a digital control system in which the aperture value of the lens is applied to the exposure amount control circuit as digital information by means of the aperture value setting mechanism. The device is so designed that the first comb tooth shaped conductor pattern and the second comb tooth shaped conductor pattern are arranged in parallel with each other in such a manner that a phase difference takes place between them. A pair of series of pulses are obtained by making the contact in functional engagement with the aperture value setting operation, moving slidingly over the first and the second conductor patterns. The direction along which the aperture value information varies is detectable by applying the pair of series of pulses thus obtained to the exposure operational circuit through the phase sorting circuit.
摘要翻译： 本发明涉及一种具有数字控制系统的相机的曝光信息设定装置，其中通过光圈值设定机构将透镜的光圈值作为数字信息施加到曝光量控制电路。 该装置被设计成使得第一梳齿形导体图案和第二梳齿形导体图案彼此平行地布置，使得它们之间发生相位差。 通过使接触与孔径值设定操作功能接合而获得一对脉冲序列，滑动地移动到第一和第二导体图案上。 孔径值信息变化的方向可以通过将这样获得的一对脉冲序列通过相位分类电路施加到曝光操作电路来检测。
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公开(公告)号：US4057809A
公开(公告)日：1977-11-08
申请号：US666458
申请日：1976-03-12
申请人： Soichi Nakamoto , Tadashi Ito , Fumio Ito , Nobuhiko Shinoda
发明人： Soichi Nakamoto , Tadashi Ito , Fumio Ito , Nobuhiko Shinoda
CPC分类号： G03B7/093
摘要： This invention relates to photographic cameras, and more particularly to an exposure control circuit of the type in which an analog output representative of the object brightness level is converted to a digital signal which is factored into an exposure value, and the period of actuation of the camera shutter is controlled in accordance with this exposure value. Still more particularly, it relates to an improvement over this conventional type exposure control with respect to the A-D conversion. The prior art converts a voltage representative of the object brightness to a digital form by the use of an A-D converter such as of the follow comparison type which is characterized by the lack of integrating aspect in converting the input voltage to the corresponding digital signal. Therefore, when the illumination for the object being photographed is caused to flicker in a period of time shorter than the effective exposure time interval, an alternating current component is introduced into the input voltage of the converter. Accordingly, it is made impossible to effect accurate exposure control based on the digital signal representing the only object brightness level. The invention provides an exposure control circuit which is not susceptible of this alternate current component as it is removed in the course of the A-D conversion.
摘要翻译： 本发明涉及摄影相机，更具体地说，涉及一种类型的曝光控制电路，其中表示对象亮度级的模拟输出被转换成被考虑到曝光值中的数字信号，以及 照相机快门根据此曝光值进行控制。 更具体地，涉及相对于A-D转换的这种常规型曝光控制的改进。 现有技术通过使用诸如以下比较类型的A-D转换器将表示对象亮度的电压转换为数字形式，其特征在于在将输入电压转换为相应的数字信号时缺乏集成方面。 因此，当拍摄对象的照明在比有效曝光时间间隔短的时间段内被闪烁时，将交流分量引入转换器的输入电压。 因此，不可能基于表示唯一对象亮度级的数字信号来实现精确的曝光控制。 本发明提供了一种曝光控制电路，其在A-D转换过程中被去除时不会受到该交流分量的影响。
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公开(公告)号：US4032933A
公开(公告)日：1977-06-28
申请号：US554901
申请日：1975-03-03
申请人： Tadashi Ito , Masanori Uchidoi , Tetsuya Taguchi , Tokuichi Tunekawa , Hiroshi Aizawa , Yoshiyuki Takishima
发明人： Tadashi Ito , Masanori Uchidoi , Tetsuya Taguchi , Tokuichi Tunekawa , Hiroshi Aizawa , Yoshiyuki Takishima
IPC分类号： G03B17/20
CPC分类号： G03B17/20
摘要： A camera having an indication system to determine suitable diaphragm aperture value by measuring the light penetrating through a photographing lens and to indicate the same digitally, wherein when said diaphragm aperture value exceeds the limit value of exposure control of a camera, a warning indication is given by the indication means to indicate the fact that the diaphragm aperture value is outside of control limit, and the number of input/output lead wires to the indication means is reduced. Thus simplifying the set-up.
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公开(公告)号：US4015149A
公开(公告)日：1977-03-29
申请号：US583445
申请日：1975-06-03
申请人： Tokuichi Tsunekawa , Masanori Uchidoi , Tetsuya Taguchi , Yoshiyuki Takishima , Tadashi Ito , Hiroshi Aizawa
发明人： Tokuichi Tsunekawa , Masanori Uchidoi , Tetsuya Taguchi , Yoshiyuki Takishima , Tadashi Ito , Hiroshi Aizawa
摘要： A temperature compensating device for devices comprising semiconductors. The temperature compensating device comprises a temperature compensating circuit, such as a circuit including a diode, and a current control circuit which adjusts the quantity of the electric current flowing through the temperature compensating circuit. The temperature characteristic of the temperature compensating circuit is mutually compensatory with that of the output of the device comprising semiconductors. When the temperature characteristic of the output of said temperature compensating circuit differs from that of the output of such semiconductor device, the current control circuit causes a current which corresponds to the difference between the temperature coefficient of the compensating circuit and that of the semiconductor device to flow through the temperature compensating circuit, so that satisfactory temperature compensation can be accomplished.
摘要翻译： 一种包含半导体器件的温度补偿装置。 温度补偿装置包括诸如包括二极管的电路的温度补偿电路和调节流过温度补偿电路的电流量的电流控制电路。 温度补偿电路的温度特性与包括半导体的器件的输出相互补偿。 当所述温度补偿电路的输出的温度特性与这种半导体器件的输出的温度特性不同时，电流控制电路使得对应于补偿电路的温度系数与半导体器件的温度系数之间的差的电流 流过温度补偿电路，从而可以实现令人满意的温度补偿。
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