摘要:
A photographing information display circuit for a camera which performs digital computation of information relative to exposure, etc. and displays the computed digital values. The display of the digital value computed is effected through an analog display circuit such as a meter circuit by an extremely simplified circuit arrangement, without using any D-A conversion circuit such as a ladder circuit or the like. The invented display circuit arrangement minimizes the electric power requirement for display to solve the problem of electric power consumption for display in small-sized camera.
摘要:
In the disclosed photographic display circuit, a counter counts pulses from a pulse generator and the exposure information to be entered is stepped while the content of the counter and that of the light measuring circuit are used to obtain an exposure value. When the data is being entered only the entered data is displayed. After entry, the resulting exposure data is displayed.
摘要:
A camera exposure control circuit performs exposure control and a series of photographic functions digitally by means of digital operation process circuits and a sequence control circuit. In the sequence control circuit a random logic circuit is used to control the camera in an efficient way and to minimize the number of the components of the camera itself.
摘要:
An apparatus for providing a digital display representative of photographic information which is visible in the viewfinder of a camera. Since the photographic information is comprised of a number of factors, a number of symbols or signs are displayed in association with the digital display so that the photographer can identify multidigit numbers displayed. The structure of the digital display is simplified by using an arrangement of connections between display and display driver which allows for further reduction in size of the camera.
摘要:
The present invention relates to an exposure control system for a camera with both priority modes in which the photographic information of either the shutter time or the aperture value and the photographic information including the measured value of the brightness of the object to be photographed are processed so as to obtain a proper exposure value. The system is characterized in that either an optional shutter time or an optional aperture value is set by a common set means, for example, a dial in such a manner that the output of the set means is put in the operation means so as to control the exposure amount. Further, the condition showing whether the value set by the common set means is the aperture value or the shutter value is clearly indicated.
摘要:
At the side of the camera body, switches for treating the totally opened F value information of the photographic lens as coded digital information of a certain determined number of bits are connected to the digital exposure operation circuit. At the side of each of the photographic lens which is made interchangeable for the camera body, a signal pin is arranged for indicating the totally opened F value proper to the photographic lens as coded digital information of the above mentioned determined number of bits in such a manner that at the time of mounting the photographic lens on the camera body, the switches at the side of the camera body are closed in selected combination in accordance with the totally opened F value of the lens. Accordingly the totally opened F value of the photographic lens is put into the digital exposure operation circuit.
摘要:
Most of the elements constituting this camera system consists of digital circuits, whereby a central processing unit is built in this camera system in such a manner that various kinds of photographic modes are possible without increasing the number of the elements.
摘要:
Most of the elements constituting this camera system consists of digital circuits, whereby a central processing unit is built in this camera system in such a manner that various kinds of photographic modes are possible without increasing the number of the elements.
摘要:
The present invention relates to a control device for camera, so designed as to sequentially control the photographing period, the release time and the release frequency in an automatic way and to print the data information on the film. The eventual abrupt change of photographic conditions is detected so as to carry out the releasing independently of the sequential control, stopping the sequential control and automatically controlling the starting time or the determination time of the sequential control.
摘要:
A printed circuit unit for a camera, comprisingA photo-sensing means to measure brightness of an object,An integrated exposure operation circuit means to conduct exposure operation based on the photo-sensing output from said photo-sensing means and other exposure factors for determining a proper exposure value (an exposure time value or an exposure aperture value),An electro-optical display means to digitally display in an optical manner the exposure value (the exposure time value and/or the exposure aperture value) within a field of view finder of the camera, andA flexible printed circuit sheet having electrically conductive paths to electrically connect said photo-sensing means and said display means to said exposure operation circuit means,And in said printed circuit unit, said photo-sensing means, said display means and said integrated exposure operation circuit means are mounted on said flexible printed circuit sheet, and an opening is formed at a part of said printed circuit sheet to allow the image light beam from a photo-taking lens system to impinge on a film,And said printed circuit unit is so made that said photo-sensing means and said display means are so placed as closely facing a part of the optical assembly of the camera, and the opening at said printed circuit sheet matches with a photographing picture frame of camera, so that it is mounted in a very limited space within said camera.