Abstract: A display method and apparatus for a camera wherein when there is a possibility of achieving an optimal exposure for a preset aperture by closing or opening a diaphragm, a warning is displayed, so that the operator is informed of the fact that an optimal exposure can be obtained if he resets the aperture.

Abstract: A camera comprises means for dividing a field to be photographed into a plurality of metering sections and metering the metering sections in a photometry menner to produce a plurality of metering outputs respectively corresponding to the metering sections, and means for operation processing said plurality of metering outputs to produce a value corresponding to a desired proper brightness value, the value being used to control exposure in the camera. The camera comprises means for discriminating the type of a lens mounted, means for producing an output signal indicative of photometry mode, means for operation processing said value corresponding to the proper brightness value, and means for changing said operation processing in accordance with said output signal indicative of said photometry mode.

Abstract: A camera in which the exposure of a film is controlled includes means for making a digital signal, converting means for converting the digital signal from the making means into an analog signal and putting out the analog signal, means for detecting the brightness of an object to be photographed and producing an analog brightness signal indicative of the detected brightness of the object to be photographed, means for comparing the analog signal from the converting means with the brightness signal, the means being adapted to put out a comparison signal when the analog signal from the converting means and the brightness signal assume a predetermined relation, the making means putting out to the converting means a digital signal indicative of exposure information concerned in the control of the exposure of the film on the basis of the digital signal made by the making means when the comparison signal is put out, the converting means converting the digital signal indicative of the exposure information into an anal

Abstract: A camera for exposing an object on a film and storing therein data in bits is disclosed. The camera comprises a terminal for the input of a determined signal, means for generating a synchronizing signal, means for detecting the input of the determined signal to the input terminal and generating a detection signal when the input is detected, means for generating a signal having one of two different levels in response to the detection signal, means for generating the data bit by bit serially in response to the signal having the one level and in synchronism with the synchronizing signal, and an output terminal electrically connected with the data generating means to output the data generated from the data generating means. A system for testing the camera is also disclosed.

Abstract: An exposure control apparatus for a camera of light intensity feedback metering system calculates an aperture to be closed, generates a correction value in accordance with a calculation result, and determines an exposure in accordance with the correction value.

Abstract: An exposure control method and apparatus for camera enables to carry out TTL light intensity feedback metering based on the output of light-measurement even when the output has a value not within a predetermined range of arithmetic operation for exposure control. In the method and apparatus, the luminance of an object field formed by the light transmitted through a taking-lens is metered to generate photometric outputs. The photometric outputs are arithmetically processed to generate arithmetic outputs while inhibiting those of the photometric outputs from being arithmetically processed which are outside of a predetermined range of output value, the aperture value is controlled in accordance with the photometric outputs.

Abstract: A metering device of a camera comprises first metering means for effecting metering while dividing an object into a plurality of areas and producing a first metering output which determines the exposure of the object on the basis of a plurality of photoelectric outputs corresponding to the areas, second metering means for metering the central partial area of the object and producing a second metering output corresponding to the partial area, an operating member operated by the operator to stop down the stop of a photo-taking lens which is in its open condition to a preset aperture value, and change-over means including means responsive to the operating member and selecting the first metering output when the stop of the photo-taking lens is in its open condition and selecting the second metering output when the stop has been stopped down to the preset aperture value.

Abstract: A multi-metering device comprises division of an object field into a plurality of areas and metering said plurality of areas and generating a plurality of photoelectric outputs corresponding to said plurality of areas, a binary circuit for standardizing said plurality of photoelectric outputs by the average output of said plurality of photoelectric outputs, and a classifying circuit for classifying the object field on the basis of said standardized outputs and operating and extracting a proper metering output by the classifying output.

Abstract: A simplified multi-light measuring device in a photographic system capable of measuring an object field divided into plural areas. The device comprises register means (e.g. 100-500) comprising plural registers for storing plural photoelectric output signals from the plural areas as digital data; reference output generating means (e.g. 60) for generating a reference output signal for determining digital data to be stored in the register means; comparator means (e.g. 21-25) for comparing each of the plural photoelectric output signals with the reference output signal and providing a corresponding output signal; and retaining means for retaining, in response to the output signal from the comparator means, digital data stored in a corresponding register of the register means.

Abstract: An exposure control device of a camera comprises first metering means for effecting metering while dividing an object into a plurality of metering areas and for generating a first metering output determining the exposure of the entire object on the basis of a plurality of photoelectric outputs corresponding to said areas, second metering means for generating a second metering output corresponding to the object light passed through the aperture of a phototaking lens, first operational means for generating a first operation output including information on the difference between the first metering output and the second metering output, second operational means for synthesizing the second metering output during the stop-down of said aperture and the first operation output and generating a second operation output, and blocking means for blocking the stop-down when the second operation output and an output corresponding to a preset shutter speed assume a predetermined relation.

Abstract: Exposure control apparatus has a multimetering system in which an object plane is divided into a plural areas to produce a plural number of photometric outputs. From the outputs one photometric output is selected as a reference output for determining the exposure value. The reference value is further changed according to the characteristic of the object field in such manner as to provide the most optimum exposure for it.

Abstract: An exposure control device for use in a camera can judge, in response to information from light-measuring means on the luminance of natural light illumination in the object field and to information from a flash unit whether a flash light is required for the photographing of said object field, whether said photographing is made in the normal flash exposure mode or in the daylight flash exposure mode.

Abstract: A metering device for metering an object field by dividing it into a plurality of areas and producing a plurality of metering outputs corresponding to the brightnesses of said areas includes means for extracting from the plurality of metering outputs a plurality of reference outputs different in level from one another, means for evaluating the level of at least one of the reference outputs, and means responsive to the evaluating means to select and put out one of the reference outputs.

Abstract: An exposure display device for a camera including a metering device for effecting metering while dividing a phototaking picture plane into a plurality of areas and for emitting a plurality of photoelectric conversion signals corresponding to those areas and processing circuitry for operating and emitting a proper exposure signal from the output signals of the metering device comprises comparing circuitry for comparing the plurality of photoelectric conversion signals with the proper exposure signal and emitting the result of the comparison, and a display device for displaying the comparison results emitted by the comparing circuitry while causing the comparison result to correspond to the divided areas.

Abstract: An improved exposure control apparatus for camera comprises a metering circuit, exposure operational circuit, correction value calculating circuit and correction operational circuit. The metering circuit meters a plural number of divisional sections of the field of an object and generates a plural number of photoelectric outputs corresponding to the respective sections of the field. The exposure operational circuit calculates an exposure value from the plural number of photoelectric outputs. The correction value calculating circuit calculates correction values for correcting the distribution characteristics of said photometric outputs relative to the distribution characteristics of illumination on the focal plane of the photographing lens of the camera at the time of photographing, the correction values corresponding to the sections of the field respectively.

Abstract: In a device for driving an electro-optical display element having a memorizing property and which produces color upon the application of a first polarity voltage thereto and loses color upon application thereto of a voltage of opposite polarity the coloration and the color-extinction taking place in response to a display command signal applied as an input to the device, there is provided means for detecting the quantity of charge stored in the display element and for generating a detection signal when the detected value of stored charge is beyond a predetermined range, means for continuously generating a pulse signal, and drive means having switch means adapted to be closed in synchronism with the pulse signal when the display command signal and the detection signal are applied as inputs, the drive means applying a voltage to the display element upon closing of the switch means.

Abstract: A metering device of a camera comprises a first photoelectric device provided with a light-receiving surface divided into a plurality of light-receiving portions each having a predetermined configuration, a second photoelectric device provided with a light-receiving surface divided into a plurality of light-receiving portions having configurations corresponding to the plurality of light-receiving portions of the first photoelectric device, and optical means for forming an object field image on the light-receiving surfaces of the first and second photoelectric devices so that metering areas metered by the light-receiving surfaces of the first and second photoelectric devices partly overlap each other on a phototaking picture and that the entire phototaking picture is substantially covered by the metering areas.

Abstract: An improved exposure control apparatus for camera comprises a metering circuit, exposure operational circuit, correction value calculating circuit and correction operational circuit. The metering circuit meters a plural number of divisional sections of the field of an object and generates a plural number of photoelectric outputs corresponding to the respective sections of the field. The exposure operational circuit calculates an exposure value from the plural number of photoelectric outputs. The correction value calculating circuit calculates correction values for correcting the distribution characteristics of said photometric outputs relative to the distribution characteristics of illumination on the focal plane of the photographing lens of the camera at the time of photographing, the correction values corresponding to the sections of the field respectively.