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公开(公告)号：US3777638A
公开(公告)日：1973-12-11
申请号：US3777638D
申请日：1972-10-30
Applicant: MINOLTA CAMERA KK
CPC classification number: G03B7/083
Abstract: In an electrical exposure control device for a single lens reflex camera in which the scene light of objects to be photographed which passes through the objective lens of the single lens reflex camera is received by light receiving elements the output thereof is detected by the compression circuit as a voltage proportional to the value of logarithm of the brightness of said light, said potential is stored in the storage means, the timing circuit is actuated, at the time of exposure, by the current anti-logarithmically converted from the stored voltage, and the activation circuit for terminating the exposure is included; there is disclosed that said device comprises a constant current generating circuit for preventing variation of current resulting from fluctuation of voltage in the power source, said voltage being impressed to the compression circuit; a circuit to which the current generated at the constant current generating circuit is fed, said circuit including photoconductive elements and resistors, and generating a voltage proportional to a value of logarithm of illumination of light receiving surfaces; a compression circuit connected in series to the secondlymentioned circuit and including a bias voltage generating circuit depending upon a set value of film speed and a set value of diaphragm aperture, said compression circuit photographically calculating voltage of both circuits which is developed by output current of said constant current generating circuit and producing output voltage proportional to a value of logarithm of duration of exposure; a storage means for storing output voltage of said compression circuit through a switch prior to exposure; a timing circuit for producing an anti-logarithmically converted current from the stored voltage of said storage means simultaneously with the exposure, the thus produced current being impressed thereto; and an activation circuit being actuated by said timing circuit and terminating the exposure, said device being free from error which may be introduced due to a variation of characteristics of P-N functions in these circuits depending upon a variation of temperature, and part of these circuits being of an integrated circuit.
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2.发明授权
公开(公告)号：US3815148A
公开(公告)日：1974-06-04
申请号：US27569872
申请日：1972-07-27
Applicant: MINOLTA CAMERA KK
CPC classification number: G03B7/083
Abstract: In an electrical exposure control device for use with reflex type photographic cameras, the voltage stored in a storage device is accurately retained after the light has been detected by a light receptive element and prior to the use of the stored voltage for purposes of exposure control by structure which ensures that the required switching of the stored voltage is coincidentally timed with the actual movement of the shutter mechanism to initiate an exposure, thereby eliminating unwanted decay between operation of a change-over switch and actual movement of the shutter mechanism.
Abstract translation: 在用于反射型照相机的电曝光控制装置中，存储在存储装置中的电压在光被光接收元件检测到之后并且在使用所存储的电压之前被准确地保持，以便通过 结构，其确保所存储的电压的所需切换与快门机构的实际移动一致地开始曝光，从而消除转换开关的操作和快门机构的实际移动之间的不必要的衰减。
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公开(公告)号：US3810208A
公开(公告)日：1974-05-07
申请号：US37577273
申请日：1973-07-02
Applicant: MINOLTA CAMERA KK
CPC classification number: G03B7/083
Abstract: In a photographic camera wherein a shutter is controlled or a shutter speed is indicated by output signals generated according to a quantity of scene light received by light receptive elements and a film sensitivity setting, and, in addition thereto if necessary, a diaphragm aperture setting, an electric circuit is responsive only to signals relating to the scene brightness for indicating whether the scene brightness is lower or higher than a predetermined critical level.
Abstract translation: 在照相机中，其中控制快门或者快门速度由根据由光接收元件接收的场景光量和胶片感光度设置而产生的输出信号指示，并且除此之外还需要光圈孔径设定， 电路仅响应与场景亮度相关的信号，用于指示场景亮度是否低于或高于预定临界水平。
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公开(公告)号：US3831040A
公开(公告)日：1974-08-20
申请号：US30531772
申请日：1972-11-10
Applicant: MINOLTA CAMERA KK
CPC classification number: G05F3/30
Abstract: A temperature-dependent current supplier specially suitable for application to an integrated circuit is characterized as follows. The base of a first transistor is connected to a connecting point between two resistors which are connected in series to each other in a collector circuit of said transistor, the voltage between the base and the collector of said transistor being selected at about kT/q where the charge quantity is q, the Boltzmann''s constant is k and the absolute temperature is T; and the base of a second transistor is connected to the collector of said first transistor, respective temperature coefficients of the baseemitter voltages of said first and second transistors being selected to differ from each other; and also current-outputs of the quantity proportional to the absolute temperature is taken out from the collector circuit of said second transistor.
Abstract translation: 特别适用于集成电路的温度依赖型电流供应器的特点如下。 第一晶体管的基极连接到在所述晶体管的集电极电路中彼此串联连接的两个电阻之间的连接点，所述晶体管的基极和集电极之间的电压选择为约kT / q，其中 电荷量为q，玻尔兹曼常数为k，绝对温度为T; 并且第二晶体管的基极连接到所述第一晶体管的集电极，所述第一和第二晶体管的基极 - 发射极电压的相应温度系数被选择为彼此不同; 并且与绝对温度成比例的量的电流输出也从所述第二晶体管的集电极电路中取出。
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Patent Agency Ranking
公开(公告)号：US3813681A
公开(公告)日：1974-05-28
申请号：US34013873
申请日：1973-03-12
Applicant: MINOLTA CAMERA KK
Inventor： SAHARA M
CPC classification number: G03B17/425
Abstract: A motor driven camera having a motor for driving the shutter releasing and film-winding mechanisms and capable of periodically repeating a predetermined cycle of operation is provided with a mechanism for automatically prolonging the cycle of operation when it fails to provide a correct exposure due to insufficient luminosity of a subject which requires a longer exposure time. The mechanism includes a first operating member which initiates the timing in association with shutter release and is actuated when a time corresponding to the predetermined cycle of operation has occurred and a second operating member which is actuated in relation to the completion of the exposure by the shutter, the motor operating the film winding mechanism when both of the first and second operating members are actuated.
Abstract translation: 具有用于驱动快门释放和胶片卷绕机构并且能够周期性地重复预定操作周期的电动机的电动机驱动照相机设置有用于当由于不足而不能提供正确曝光时自动延长操作周期的机构 需要较长曝光时间的被摄体的亮度。 该机构包括第一操作构件，该第一操作构件启动与快门释放相关联的定时，并且当与预定操作周期相对应的时间发生时被致动;以及第二操作构件，其相对于快门完成曝光被致动 当第一操作构件和第二操作构件都被致动时，马达操作薄膜卷绕机构。
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公开(公告)号：US3846814A
公开(公告)日：1974-11-05
申请号：US38139373
申请日：1973-07-23
Applicant: MINOLTA CAMERA KK
CPC classification number: G03B7/083
Abstract: A universal circuit module is adaptable for the automatic exposure control of different types of camera shutter mechanisms. The circuit module includes switching means responsive to input signals for supplying output signals for controlling the excitation of a load connected to output terminals of the module and biasing means for biasing semiconductor switch means within the module for actuating the switch means at one-half of the voltage of a power source.
Abstract translation: 通用电路模块适用于不同类型的相机快门机构的自动曝光控制。 电路模块包括响应于输入信号的开关装置，用于提供用于控制连接到模块的输出端子的负载的激励的输出信号，以及用于偏置模块内的半导体开关装置的偏置装置，用于在半导体装置 电源电压。
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7.发明授权
公开(公告)号：US3756130A
公开(公告)日：1973-09-04
申请号：US3756130D
申请日：1971-04-07
Applicant: MINOLTA CAMERA KK
CPC classification number: G03B7/083
Abstract: First and second output voltages are generated respectively in accordance with the logarithm of the intensity of light and as a function of a manually set exposure condition. A control signal to initiate shutter closing is generated when a signal which changes in proportion to the logarithm of an elapsed time period initiated by shutter release operation plus the second output voltage is substantially equal to the first output voltage. The control device includes a circuit for comparing the voltages. The device may be modified to generate a third output voltage which changes in response to the change of the signal and then comparing the first output voltage with the second plus the third output voltage.
Abstract translation: 分别根据光强度的对数和手动设定的曝光条件的函数产生第一和第二输出电压。 当通过快门释放操作加上第二输出电压启动的经过时间段的对数变化的信号基本上等于第一输出电压时，产生启动快门关闭的控制信号。 控制装置包括用于比较电压的电路。 可以修改该装置以产生响应于信号变化而变化的第三输出电压，然后将第一输出电压与第二加上第三输出电压进行比较。
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公开(公告)号：US3728946A
公开(公告)日：1973-04-24
申请号：US3728946D
申请日：1971-07-06
Applicant: MINOLTA CAMERA KK
Inventor： KURAMOTO Y , TSUJIMOTO K , YATA K , SAHARA M
CPC classification number: G03B7/083
Abstract: Switching mechanism in an exposure control device for a photoconductive camera reduces unnecessary battery consumption by disconnecting the power source from a light measuring circuit and a mechanism for actuating shutter closing during those times when either the output of the light measuring circuit and/or the actuation of the shutter are not required. Manually operative individual switches respectively interconnect the light measuring circuit and the shutter actuation mechanism with the power source. A button switch movable between first and second positions engages with a locking member to prevent actuation of the shutter release button to prevent interconnection of the shutter actuating mechanism with the power source when an exposure time setting member is set to an automatic exposure position and the button switch is in the first position for opening the switch interconnecting the light measuring circuit with the battery source. Rotation of the exposure time setting member to any one of a number of positions rotates the locking member enabling the release button to be depressed and the interconnection of the shutter actuating mechanism with the battery source.
Abstract translation: 用于感光摄像机的曝光控制装置中的切换机构通过在光测量电路的输出和/或致动的光照测量电路的输出期间断开电源和光测量电路以及用于致动快门关闭的机构来减少不必要的电池消耗 不需要快门。 手动操作的各个开关分别将光测量电路和快门致动机构与电源互连。 可在第一位置和第二位置之间移动的按钮开关与锁定构件接合以防止快门释放按钮的致动，以防止当曝光时间设定构件被设置为自动曝光位置时快门致动机构与电源的互连，并且按钮 开关处于用于打开将光测量电路与电池源互连的开关的第一位置。 将曝光时间设定部件旋转到多个位置中的任何一个位置使锁定部件旋转，使得释放按钮被压下并且快门致动机构与电池源的互连。
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公开(公告)号：US3714543A
公开(公告)日：1973-01-30
申请号：US3714543D
申请日：1971-11-22
Applicant: MINOLTA CAMERA KK
CPC classification number: G05F3/225 , B06B2201/55 , G05F3/265
Abstract: A constant current transistor circuit employs a pair of PNP transistors disposed adjacent to each other on a single monolithic integrated circuit. Also included are a pair of NPN transistors disposed adjacent to each other on the same monolithic integrated circuit, with respective ones of the PNP transistors and the NPN transistors being connected to each other to form first and second combined transistor circuits. In each of the combined transistor circuits, the emitter of the PNP transistor is connected to the collector of the NPN transistor, while the collector of the PNP transistor is connected to the base of the NPN transistor, the respective bases of each PNP transistor also being connected directly to each other. Also provided is a third NPN transistor to provide constant current, the collector of which is connected to the emitter of the NPN transistor of one of the combined transistor circuits, while a diode is connected between the connected bases of the PNP transistors of the two combined transistor circuits and the collector of the third NPN transistor, while a DC power source is connected in series with a load and is provided across the third NPN transistor and said combined transistor circuits.
Abstract translation: 恒流晶体管电路采用在单个单片集成电路上彼此相邻配置的一对PNP晶体管。 还包括在同一单片集成电路上彼此相邻布置的一对NPN晶体管，其中相应的PNP晶体管和NPN晶体管彼此连接以形成第一和第二组合晶体管电路。 在每个组合晶体管电路中，PNP晶体管的发射极连接到NPN晶体管的集电极，而PNP晶体管的集电极连接到NPN晶体管的基极，每个PNP晶体管的基极也是 彼此直接相连。 还提供了第三NPN晶体管，其提供恒定电流，其集电极连接到组合晶体管电路之一的NPN晶体管的发射极，而二极管连接在两个组合的PNP晶体管的连接基极之间 晶体管电路和第三NPN晶体管的集电极，而DC电源与负载串联连接，并且跨越第三NPN晶体管和所述组合晶体管电路。
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