摘要:
In a camera system effective use of a single microcomputer for both automatic exposure control and automatic focus control is made possible by designing the microcomputer so that it repeats calculation for the automatic exposure control during time period for charge accumulation in a CCD focus detection sensor and during lens focusing movement and so that it performs calculation for the automatic focus control while interrupting the calculation for the automatic exposure control upon the ending of the charge accumulation in the CCD focus detection sensor and upon shifting of the lens by an amount predetermine based on the result of the calculation for the automatic focus control.
摘要:
In a data transmission system for a camera, a central processing unit (CPU) for controlling operation of the camera communicates with various circuit arrangements using data signals in a serial form under control of a clock signal selected in dependence upon which the circuit arrangement is the communication designation of the CPU at the time. Some of the circuit arrangements are provided in the camera while the other of the circuit arrangements are provided in accessories attachable to the camera. The CPU communicates with the circuit arrangements provided in the camera under control of a clock signal having a higher frequency for increasing the data communication speed while it communicates with the circuit arrangements provided in the accessories under control of a clock signal having a slower frequency for improving the accuracy of the data communication.
摘要:
A display system for a camera which can provide an efficient display of information with a reduced entire area for display. The display system for a camera comprises first and second display means for displaying various kinds of information on the outside of a body and within a finder of the camera. Display controlling means controls the first and second display means such that information of a sensitivity of a film loaded in the camera and information regarding feeding of the film are displayed only on the outside of the camera while information of an exposure time and information of a diaphragm aperture value are displayed only within the finder of the camera.
摘要:
A camera with a barrier wherein a photograph with proper exposure can be produced without taking anything into consideration so far as the barrier is closed and change-over of an operation mode of the camera can be effected automatically in response to a position or a motion of the barrier. The barrier is mounted for movement between an open position in which an operable member operable for reflecting intention of a photographer on exposure is exposed to allow operation of the operable member and a closed position in which the barrier covers the operable member. When the barrier is in the open position, an exposure controlling mode in which intention of a photographer is reflected on exposure can be selected, but when the barrier is in the closed position, the intention of the photographer is prevented from being reflected on exposure. The barrier has a further position at which a controlling circuit for the camera exposure is held inoperative, and when the barrier is moved between adjacent ones of the positions, the controlling circuit is rendered operative.
摘要:
A photo signal processing apparatus which comprises a light receiving unit of charge accumulation type for outputting a data corresponding to a condition of light received thereby, a data processor for applying a predetermined processing to the data outputted from the light receiving unit, an accumulation initiating device for causing the light receiving unit to initiate a charge accumulating operation, an accumulation interrupting device for interrupting the charge accumulating operation of the light receiving unit, a counter for counting a time passed during a period subsequent to the start of the charge accumulating operation of the light receiving unit and until the termination of the charge accumulating operation of the light receiving unit, and a control unit for activating the accumulation initiating device at a timing required to interrupt the charge accumulating operation of the light receiving unit at the time of termination of the data processing performed by the data processor.
摘要:
A camera control system is provided having a plurality of microcomputers, each microcomputer operating in conjunction with a respective clock which generates clock pulses at a respective frequency. A first microcomputer controls a second microcomputer after the second microcomputer has stabilized after initial start up. The first microcomputer controls the overall camera operation, and the second microcomputer controls the camera display operation. When a battery is loaded into the camera, both microcomputers are reset.
摘要:
A photo signal processing apparatus which comprises a light receiving unit of charge accumulation type for outputting a data corresponding to a condition of light received thereby, a data processor for applying a predetermined processing to the data outputted from the light receiving unit, an accumulation initiating device for causing the light receiving unit to initiate a charge accumulating operation, an accumulation interrupting device for interrupting the charge accumulating operation of the light receiving unit, a counter for counting a time passed during a period subsequent to the start of the charge accumulating operation of the light receiving unit and until the termination of the charge accumulating operation of the light receiving unit, and a control unit for activating the accumulation initiating device at a timing required to interrupt the charge accumulating operation of the light receiving unit at the time of termination of the data processing performed by the data processor.
摘要:
A control device for use in a camera for driving two electric motors has a simple circuit arrangement in which one of three serial circuits having series connected transistors is commonly used for selectively driving the two electric motors in turns. In addition, for driving electromagnets and motors, the control device includes a CPU for generating m bits control data and a decoder driver IC for decoding the n bits control data into a m bit signals which selectively drive the electromagnets and the motors, wherein n is smaller than m, so that the number of control signal lines needed for the transmission of the control data from the CPU to the decoder driver IC can be reduced.
摘要:
A control device for use in a camera system makes it possible for the camera system to effect a high speed consecutive photographing only by repeated depression of a shutter release button. The control device also makes it possible for the camera system to effect a low speed consecutive photographing when the shutter release button is kept depressed.
摘要:
A photographic camera having a photographic operating device including a focus detecting circuit, a shutter control circuit, a light measuring circuit and a light emission control circuit, an adjustment data memory for storing adjustment data based on functional characteristics of the respective circuits of the photographic operating device and an adjustment circuit for adjusting the respective circuits by using adjustment data read from the adjustment data memory. The adjustment data memory is consituted by an EEPROM for making it possible to conveniently and readily rewrite the adjustment data. The adjustment data is calculated from a linear function expression established between a design value and an actual value for avoiding trial-and-error preparatory operations for the adjustment.