公开(公告)号：USRE29776E

公开(公告)日：1978-09-19

申请号：US590690

申请日：1975-06-26

Applicant: Yutaka Kohtani

Inventor： Yutaka Kohtani

IPC: G03B7/093

CPC classification number: G03B7/093

Abstract: In the exposure control apparatus disclosed, a photo-electric element converts light to which it is exposed to an electrical quantity. A pulse entry circuit responds to the photo-electric element and enters a sequence of sets of pulses into a memory. Each set of pulses corresponds in number to the electric quantity and erases the previous set. A timing clock responds to a signal from a shutter opening member and keeps reading out the content of the memory until the memory is empty at which time the circuit, in conjunction with the memory, produces a shutter closing signal.

公开(公告)号：US4089012A

公开(公告)日：1978-05-09

申请号：US738994

申请日：1976-11-04

Applicant: Masahiro Kawasaki

Inventor： Masahiro Kawasaki

IPC: G03B7/00 ,  G01J1/42 ,  G01J1/44 ,  G03B7/093 ,  G03B17/18 ,  G03B17/20 ,  G03B7/08

CPC classification number: G03B7/093 ,  G01J1/4214 ,  G03B17/20

Abstract: A digital exposure time indicating system for a camera includes a light meter whose analog output is proportional to exposure time as a function of preset film sensitivity and aperture opening values, and the measured brightness level. The meter output is fed to a comparator, together with an analog signal from a D/A converter coupled to a counter which accumulates the pulses generated by an oscillator. When the converter output reaches the meter output the comparator signal, acting through a logic circuit, causes the counter signals to be set into a latch, whose outputs are fed through a B/D converter to an LED display.The latching is performed a half cycle after a comparison, whereby transients are allowed to settle out. Provision is also made for over scale and under scale indications when the meter output is outside of the normal comparison range, and a gate circuit causes the LEDs to flicker when the battery is low.

Abstract translation: 用于照相机的数字曝光时间指示系统包括一个光度计，其模拟输出与曝光时间成比例，作为预设胶片感光度和光圈开度值以及所测亮度水平的函数。 仪表输出与来自耦合到累加由振荡器产生的脉冲的计数器的D / A转换器的模拟信号一起馈送到比较器。 当转换器输出达到仪表输出时，通过逻辑电路作用的比较器信号使计数器信号设置为锁存器，其输出通过B / D转换器馈送到LED显示屏。

公开(公告)号：US4080611A

公开(公告)日：1978-03-21

申请号：US701680

申请日：1976-07-01

Applicant: Walter Bletz ,  Werner Holle

Inventor： Walter Bletz ,  Werner Holle

IPC: G03B7/093 ,  G03B7/095 ,  G03B9/62 ,  G03B7/08

CPC classification number: G03B7/093 ,  G03B7/095

Abstract: Apparatus for storing a voltage analogous to an exposure parameter in photographic cameras with an electronic timer and with electric exposure measurement, having the characteristics that an analog-to-digital converter is provided as the storage unit, containing a digital-to-analog converter, the output voltage of which is fed to a comparator wherein this output voltage is compared with the voltage delivered by the exposure meter part. The signal obtained at the comparator output in the case of voltage identity stops the analog-to-digital converter and the voltage remaining at the output of the digital-to-analog converter controls the respective exposure parameter in the camera.

Abstract translation: 用于将电子计时器和具有电曝光测量的照相机中类似于曝光参数的电压存储为具有模数转换器作为存储单元的特征的装置，其包含数模转换器， 其输出电压被馈送到比较器，其中该输出电压与由曝光计部件输送的电压进行比较。 在电压同步的情况下，在比较器输出端获得的信号会停止模数转换器，并且数模转换器输出端剩余的电压控制相机中的相应曝光参数。

公开(公告)号：US4058816A

公开(公告)日：1977-11-15

申请号：US632195

申请日：1975-11-17

Applicant: Tsukumo Nobusawa

Inventor： Tsukumo Nobusawa

IPC: G03B7/093

CPC classification number: G03B7/093

Abstract: This invention provides apparatus for producing a command signal used to control the closing of a camera shutter. Before the shutter opens, a photo-responsive portion of the apparatus generates a number of serially occurring data pulses. After the shutter opens, a timing pulse generator portion produces a number of serially occurring timing pulses. A memory portion, including a plurality of registers, accumulates a decimal count of the serially occurring data pulses with each register storing a respective one of unit and higher decimal place portions of the decimal count. The memory forms part of a comparison circuit arrangement which responds to the data pulses and the timing pulses to produce the command signal.

Abstract translation: 本发明提供了用于产生用于控制相机快门关闭的命令信号的装置。 在快门打开之前，设备的光响应部分产生多个串行发生的数据脉冲。 在快门打开之后，定时脉冲发生器部分产生多个串行发生的定时脉冲。 包括多个寄存器的存储器部分累积串行发生的数据脉冲的十进制计数，每个寄存器存储十进制计数的单位和更小的小数部分的相应一个。 存储器形成响应于数据脉冲和定时脉冲以产生命令信号的比较电路装置的一部分。

公开(公告)号：US4054888A

公开(公告)日：1977-10-18

申请号：US712424

申请日：1976-08-06

Applicant: Susumu Kozuki ,  Toshikazu Ichiyanagi ,  Yoshiaki Watanabe ,  Takashi Uchiyama ,  Akio Sunouchi

Inventor： Susumu Kozuki ,  Toshikazu Ichiyanagi ,  Yoshiaki Watanabe ,  Takashi Uchiyama ,  Akio Sunouchi

IPC: G03B7/08 ,  G03B7/0805 ,  G03B7/093 ,  G03B17/40 ,  G03B17/42 ,  G03B19/12 ,  G03B1/18

CPC classification number: G03B17/425 ,  G03B19/12 ,  G03B7/093

Abstract: A motor driven photographing control circuit for a double preference type automatic exposure control camera which is used for continuous photographing with a motor drive device attached thereto. When a sum of the shutter time computed by a shutter time computing circuit and the length of time required for a winding operation become longer than a preset photographing cycle in carrying out such continuous photographing, an alarm is displayed giving a warning that photographing in the preset cycle is not possible. Concurrently with this, a stop preference mode of photographing is shifted to a shutter preference mode and the shutter is controlled to be operated at a preset length of time, so that continuous photographing can be accomplished in a set cycle.

Abstract translation: 一种用于双重偏好型自动曝光控制摄像机的电动机驱动拍摄控制电路，其用于连接其上的电动机驱动装置的连续拍摄。 当由快门时间计算电路计算出的快门时间之和和进行这种连续拍摄时所需的时间长度比预设拍摄周期长的时候，显示警报，指示在预设中进行拍摄 循环是不可能的。 与此同时，停止偏好拍摄模式被切换到快门偏好模式，并且快门被控制为以预设的时间长度操作，使得可以在设定的周期中完成连续拍摄。

公开(公告)号：US4047189A

公开(公告)日：1977-09-06

申请号：US666944

申请日：1976-03-15

Applicant: Walter Bletz ,  Werner Holle

Inventor： Walter Bletz ,  Werner Holle

IPC: G03B7/093 ,  G03B7/08

CPC classification number: G03B7/093

Abstract: An electronic device for storing and indicating illumination parameters and for controlling the exposure time for photographic cameras having an exposure meter and a timer. The exposure meter includes an analog/digital converter with a digital storage part having a plurality of binary stages. These various stages correspond to different intensities of illumination of an object. The timer includes a combination of binary ratio reducers and logic gates and these are adapted to be selected by the analog/digital converter or by manual adjustment. A generator produces impulses which control the timer.

Abstract translation: 一种用于存储和指示照明参数并用于控制具有曝光计和定时器的照相机的曝光时间的电子设备。 曝光表包括具有数字存储部分的具有多个二进制级的模拟/数字转换器。 这些各个阶段对应于物体的不同的照明强度。 定时器包括二进制比减速器和逻辑门的组合，并且它们适于由模拟/数字转换器或通过手动调整来选择。 发生器产生控制定时器的脉冲。

公开(公告)号：US4037233A

公开(公告)日：1977-07-19

申请号：US606572

申请日：1975-08-21

Applicant: Nobuhiko Shinoda ,  Tadashi Ito ,  Fumio Ito ,  Yukio Mashimo ,  Nobuaki Sakurada

Inventor： Nobuhiko Shinoda ,  Tadashi Ito ,  Fumio Ito ,  Yukio Mashimo ,  Nobuaki Sakurada

IPC: G03B7/091 ,  G03B7/093 ,  G03B7/08

CPC classification number: G03B7/093

Abstract: An exposure control device is disclosed which has an extremely high accuracy as compared with the prior art, the error range being within a one-eighth step. For such a highly accurate control of exposure time, a value of exposure time to be determined is converted to a binary code of n bits, of which the lowest one bit is weighed one-eighth step. Based on the decimal number corresponding to the upper m bits of the binary code, the frequency of the control signal is adjusted and is used in reading out the lower (n - m) bits of the same binary code, whereby the period of actuation of the shutter is determined.

Abstract translation: 公开了一种与现有技术相比具有极高精度的曝光控制装置，其误差范围在八分之一步骤内。 对于曝光时间的这种高度准确的控制，要确定的曝光时间的值被转换为n位的二进制码，其中最低一位被称重八分之一步。 基于对应于二进制码的高位m位的十进制数，控制信号的频率被调整并用于读出相同二进制码的下位（n-m）位，由此， 确定快门。

公开(公告)号：US4015275A

公开(公告)日：1977-03-29

申请号：US551136

申请日：1975-02-19

Applicant: Walter Bletz

Inventor： Walter Bletz

IPC: G03B7/093 ,  G03B9/58 ,  G03B9/62 ,  G03B7/08

CPC classification number: G03B7/093 ,  G03B9/58

Abstract: Digital timers for the electronic control of a camera shutter having a pulse generator and a number of binary dividers each associated with a resistor, the total of these resistors performing a digital to analog conversion and being connected to a common point. The potential of the common point being representative for the number of the binary dividers being in "1" state. A comparator actuating a shutter solenoid when the potential of the common point reaches a predetermined value. All the resistors having the same conductance so that at those times corresponding to powers of 2 (reference timing series) values of potential are formed, which correspond to the logarithm of the time obtained.

Abstract translation: 用于电子控制具有脉冲发生器和多个与电阻器相关联的多个二进制分频器的照相机快门的数字定时器，这些电阻器的总和执行数模转换并连接到公共点。 共同点的潜力代表二进制分频器处于“1”状态的数量。 当公共点的电位达到预定值时，比较器致动快门螺线管。 形成具有相同电导的所有电阻器，使得在对应于2（参考定时序列）值的电位值的那些时间形成与对应于所获得的时间的对数相对应的电阻。

公开(公告)号：US3999191A

公开(公告)日：1976-12-21

申请号：US499977

申请日：1974-08-23

Applicant: Takeo Saito ,  Youichi Seki

Inventor： Takeo Saito ,  Youichi Seki

IPC: G03B7/093 ,  G03B9/58 ,  G03B17/18 ,  G03B7/08

CPC classification number: G03B7/093 ,  G03B9/58

Abstract: An electronic camera shutter control circuit having a reversible counter for counting a number of pulses proportional to the duration of an exposure time. When the camera shutter is opened pulses are subtracted from the memory content of the reversible counter until the counter content is zero and the exposure is terminated. The reversible counter includes a final stage which does not change state if the number of pulses applied to the counter exceeds the memory capacity of the counter. For this condition the exposure time is first controlled by the charging time of a capacitor until a voltage stored in the capacitor exceeds a certain value whereupon the memory content of the counter is subtracted until it is zero and the exposure is terminated.

Abstract translation: 一种具有可逆计数器的电子照相机快门控制电路，用于对与曝光时间的持续时间成比例的脉冲数进行计数。 当相机快门打开时，从可逆计数器的存储器内容中减去脉冲，直到计数器内容为零并且曝光被终止。 如果施加到计数器的脉冲数超过计数器的存储容量，则可逆计数器包括不改变状态的最后级。 对于这种情况，首先通过电容器的充电时间来控制曝光时间，直到存储在电容器中的电压超过一定值，从而减去计数器的存储器内容直到其为零并且曝光被终止。

公开(公告)号：US3889278A

公开(公告)日：1975-06-10

申请号：US36542773

申请日：1973-05-13

Applicant: YASHIKA CO LTD

Inventor： TAKAHATA HISATOSHI ,  TANIKAWA KOHJI

IPC: G03B7/093 ,  G03B17/18 ,  G03B17/20 ,  G03B7/08

CPC classification number: G03B7/093 ,  G03B17/20

Abstract: An electric shutter control circuit comprising a pulse oscillator producing pulses at a pulse frequency corresponding to photographing conditions such as illumination intensity of the scene and a counting and memorizing means for memorizing and indicating the output of the pulse oscillator prior to the shutter releasing. Upon the subsequent action of opening the shutter pulses at a predetermined pulse frequency are supplied to the counting and memorizing means, and the time required for shifting the con

Abstract translation: 一种电动快门控制电路，包括脉冲振荡器，产生脉冲频率，脉冲频率对应于诸如场景的照明强度的拍摄条件，以及用于在快门释放之前存储和指示脉冲振荡器的输出的计数和存储装置。 当以预定的脉冲频率打开快门脉冲的后续动作被提供给计数和存储装置时，将计数和存储装置的内容移动到其最后阶段所需的时间成为快门时间。 因此，快门时间完全以数字方式进行控制，不受温度影响，也可以指示