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公开(公告)号：US3992622A
公开(公告)日：1976-11-16
申请号：US634145
申请日：1975-11-21
CPC分类号： G06G7/24
摘要： In a logarithmic amplifier employing a log-diode connected across an operational amplifier, a dividing resistor and a transistor circuit are connected in parallel between the output of the operational amplifier and the log-diode. The temperature characteristic of the log-diode and that of the transistor circuit cancel each other to effect temperature compensation in the output of the operational amplifier.
摘要翻译： 在使用连接在运算放大器上的对数二极管的对数放大器中，分压电阻和晶体管电路并联连接在运算放大器的输出端和对数二极管之间。 对数二极管和晶体管电路的温度特性相互抵消，以便在运算放大器的输出端进行温度补偿。
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公开(公告)号：US4232955A
公开(公告)日：1980-11-11
申请号：US71257
申请日：1979-08-30
申请人： Saburo Numata , Shinichiro Fujino
发明人： Saburo Numata , Shinichiro Fujino
CPC分类号： G03B7/083
摘要： In a photographic camera provided with an exposure control circuit including a light measuring circuit which measures scene brightness and a memory circuit which memorizes the output of the light measuring circuit, a switching circuit is connected between the light measuring circuit and the memory circuit. The switching circuit is connected with a time constant circuit so that the switching circuit may be turned off to lock the memory memorized in the memory circuit when the time determined by the time constant circuit has lapsed since the power source is turned on. In a preferred embodiment, the time constant circuit is further connected with the output of the light measuring circuit so that the time determined by the time constant circuit is varied in accordance with the scene brightness.
摘要翻译： 在设置有包括测量场景亮度的光测量电路的曝光控制电路的照相机和存储光测量电路的输出的存储电路中，切换电路连接在光测量电路和存储电路之间。 开关电路与时间常数电路连接，使得当电源接通时，当由时间常数电路确定的时间过去时，切换电路可能被关闭以锁定存储电路中存储的存储器。 在优选实施例中，时间常数电路还与光测量电路的输出连接，使得由时间常数电路确定的时间根据场景亮度而变化。
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公开(公告)号：US4079269A
公开(公告)日：1978-03-14
申请号：US679372
申请日：1976-04-22
申请人： Saburo Numata , Shinichiro Fujino
发明人： Saburo Numata , Shinichiro Fujino
摘要： A switch means for electrically operating a device in a photographic camera is composed of a mechanical switch and a semiconductor switching element connected with the mechanical switch. The mechanical switch has a pair of contacts made of resilient conductive material and increases its conductivity as the pressure applied thereto increases. By the increase of the conductivity of the mechanical switch an input voltage supplied to the semiconductor switching element is raised and the switching element is turned on when the input voltage has reached a predetermined level. Thus, chattering and large consumption of electric power are prevented.
摘要翻译： 用于电摄相机中的装置的开关装置由机械开关和与机械开关连接的半导体开关元件组成。 机械开关具有由弹性导电材料制成的一对触点，并随着施加的压力而增加其导电性。 通过机械开关的电导率的增加，提供给半导体开关元件的输入电压升高，并且当输入电压达到预定电平时开关元件导通。 因此，防止颤动和大量的电力消耗。
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公开(公告)号：US4070682A
公开(公告)日：1978-01-24
申请号：US701076
申请日：1976-06-30
申请人： Saburo Numata , Shinichiro Fujino
发明人： Saburo Numata , Shinichiro Fujino
CPC分类号： G03B7/083
摘要： An exposure time control circuit for a camera includes a level selecting circuit between a light measuring circuit and a memory circuit to have a selected output memorized in the memory circuit. The level selecting circuit is provided with two inputs, one of which is the output of the light measuring circuit indicative of the scene brightness and the other of which is the output of a maximum exposure time output source indicative of the maximum exposure time acceptable to the camera. The memory circuit memorizes the output selected by the level selecting circuit which output indicates a shorter exposure time between the two.
摘要翻译： 照相机的曝光时间控制电路包括在光测量电路和存储器电路之间的电平选择电路，以使存储在存储器电路中的选择输出。 电平选择电路设置有两个输入，其中一个是指示场景亮度的光测量电路的输出，另一个是指示最大曝光时间输出源的输出，表示最大曝光时间可接受的曝光时间 相机。 存储电路存储由电平选择电路选择的输出，该输出指示两者之间的较短的曝光时间。
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公开(公告)号：US4020363A
公开(公告)日：1977-04-26
申请号：US643814
申请日：1975-12-23
申请人： Saburo Numata , Shinichiro Fujino
发明人： Saburo Numata , Shinichiro Fujino
CPC分类号： G06G7/1865
摘要： In an integration circuit including an operational amplifier wherein an integrating capacitor and a switch are connected in series across the operational amplifier as a negative feedback circuit, a positive feedback resistor is connected between the connecting point between the integrating capacitor and the switch and the reference input terminal of the operational amplifier. The potential difference across the integrating capacitor is made zero in order to remove the influence of the leakage current of the switch when the switch is in its OFF-state.
摘要翻译： 在包括运算放大器的积分电路中，积分电容器和开关串联连接在运算放大器上作为负反馈电路，正反馈电阻连接在积分电容器和开关之间的连接点与参考输入端 端子的运算放大器。 积分电容器两端的电位差为零，以便在开关处于关断状态时消除开关漏电流的影响。
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公开(公告)号：US3961341A
公开(公告)日：1976-06-01
申请号：US531601
申请日：1974-12-11
申请人： Saburo Numata , Shinichiro Fujino
发明人： Saburo Numata , Shinichiro Fujino
CPC分类号： G03B7/083 , G03B2217/005
摘要： An automatic exposure control circuit which controls the shutter speed in accordance with the output of a light measuring circuit including a photodetector which detects the level of scene brightness. The output of the photodetector is memorized by a memorizing capacitor and the shutter speed control circuit is operated in accordance with the memorized output. The memorized level is shifted to a predetermined level when the memorized level is below a predetermined level which corresponds to a limit of scene brightness which can be photographed. A switching circuit and a shifting circuit connected therewith are connected with an end of the memorizing capacitor so that the level of the memorized output may be shifted by the shifting circuit when the level memorized by the capacitor is below a predetermined level. The shutter speed is therefore determined regardless of the scene brightness when the level of the scene brightness is below a predetermined level.
摘要翻译： 一种自动曝光控制电路，其根据检测场景亮度的光检测器的光测量电路的输出来控制快门速度。 光电检测器的输出由存储电容器存储，并且快门速度控制电路根据存储的输出进行操作。 当存储的电平低于对应于可以拍摄的场景亮度的极限的预定电平时，存储电平被转移到预定电平。 连接有开关电路和移位电路与存储电容器的端部连接，使得当由电容器存储的电平低于预定电平时，存储的输出的电平可能被移位电路移位。 因此，当场景亮度的水平低于预定水平时，无论场景亮度如何，都确定快门速度。
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公开(公告)号：US4037236A
公开(公告)日：1977-07-19
申请号：US630432
申请日：1975-11-10
申请人： Saburo Numata , Shinichiro Fujino
发明人： Saburo Numata , Shinichiro Fujino
CPC分类号： G03B7/083
摘要： In an electric shutter including a light measuring circuit for measuring the scene brightness and a comparator connected therewith for providing output voltage which rises from a low level to a high level when a time corresponding to the scene brightness has lapsed, a switching transistor circuit and an electromagnet for holding the trailing shutter blind are connected in parallel between the output of the comparator and the main power switch. When the power switch is turned on, both the switching transistor circuit and the electromagnet are turned on. When the output voltage of the comparator rises up to the high level, the switching transistor circuit and the electromagnet are turned off.
摘要翻译： 在包括用于测量场景亮度的光测量电路和与之相连的比较器的电动快门中，当与场景亮度相对应的时间过去时，提供从低电平升高到高电平的输出电压，开关晶体管电路和 用于保持拖曳快门帘的电磁铁并联在比较器的输出端和主电源开关之间。 当电源开关接通时，开关晶体管电路和电磁体都被接通。 当比较器的输出电压上升到高电平时，开关晶体管电路和电磁体被断开。
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公开(公告)号：US3995293A
公开(公告)日：1976-11-30
申请号：US641766
申请日：1975-12-17
申请人： Saburo Numata , Shinichiro Fujino
发明人： Saburo Numata , Shinichiro Fujino
CPC分类号： H05K3/365 , G03B17/00 , G03B2217/002
摘要： A space is formed between a wall of a camera body and a part of a printed circuit board fixed to the wall of the camera body. A part of a flexible printed circuit and a resilient member are inserted into the space to resiliently press the flexible circuit onto the printed circuit board to assure a tight electric contact between the flexible printed circuit and the printed circuit board.
摘要翻译： 在照相机主体的壁和固定在照相机主体的壁上的印刷电路板的一部分之间形成空间。 将柔性印刷电路和弹性部件的一部分插入该空间中以将柔性电路弹性地按压到印刷电路板上，以确保柔性印刷电路与印刷电路板之间的紧密电接触。
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公开(公告)号：US4342505A
公开(公告)日：1982-08-03
申请号：US61855
申请日：1979-07-30
申请人： Saburo Numata , Shinichiro Fujino
发明人： Saburo Numata , Shinichiro Fujino
CPC分类号： G03B7/093
摘要： In an automatic exposure control device of digital information type for a single lens reflex camera, a sampling circuit for dividing pulses generated from an oscillator and a shutter release signal generating circuit are connected with a gate means having a function of an AND circuit. The gate means connected with a leading shutter blind control device and a normally turned OFF gate interposed between the oscillator and a clock pulse counter. When the gate means is turned ON by the simultaneous output of the sampling circuit and the shutter release signal generating circuit, the normally turned OFF gate is turned ON to initiate the counting of the clock pulses and the leading shutter blind is started to initiate exposure.
摘要翻译： 在用于单个镜头反射照相机的数字信息类型的自动曝光控制装置中，用于将从振荡器产生的脉冲和快门释放信号发生电路分频的采样电路与具有AND电路功能的门装置连接。 该门装置与前置的快门遮蔽控制装置和一个插在振荡器和时钟脉冲计数器之间的正常关闭门连接。 当通过采样电路和快门释放信号发生电路的同时输出使门装置接通时，通常关闭的门被导通，以启动时钟脉冲的计数，并且开始引导快门盲目以开始曝光。
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公开(公告)号：US4060788A
公开(公告)日：1977-11-29
申请号：US711362
申请日：1976-08-03
申请人： Saburo Numata , Shinichiro Fujino
发明人： Saburo Numata , Shinichiro Fujino
摘要： A resistor having a high resistance and a resistor having a low resistance are arranged in parallel to each other in side by side relation. A pair of input terminals are fixed to both ends of the resistor of low resistance. A movable contact is provided in slidable contact with the resistor of high resistance moving along the edge of the resistor of low resistance which is in contact with an edge of the resistor of high resistance.
摘要翻译： 具有高电阻的电阻器和具有低电阻的电阻器并排布置成彼此并联。 一对输入端固定在低电阻电阻的两端。 提供可动触头，该触点与高电阻电阻器沿着与电阻器的高电阻边缘接触的低电阻边缘移动。
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