Nobuhiko Shinoda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
Abstract: In the camera exposure control apparatus disclosed, a light sensor produces a first analog signal corresponding to the brightness of an object to be photographed. This signal is compared to a gradually varying second analog signal. The variation of the second analog signal is discontinued when the first and second signals reach a predetermined relationship and the second analog signal is stored. As the aperture of the camera's diaphragm is varied, the stored signal is compared with an analog signal corresponding to the diaphragm opening to produce a control signal that inhibits aperture variation when the latter compared signals reach a predetermined relationship.
September 28, 1976
Date of Patent:
May 16, 1978
Canon Kabushiki Kaisha
Nobuhiko Shinoda, Tadashi Ito, Soichi Nakamoto, Fumio Ito
Abstract: 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.
Abstract: An exposure control apparatus for a photographic camera wherein various exposure control parameters after being digitized are applied to a computer. The computer then derives an exposure value based on digital computation. The apparatus is provided with combined means for converting the preselected exposure control parameters to corresponding mechanical displacements and for converting the displacements directly to corresponding numbers of pulses, whereby the computer is made responsive to the numbers of pulses.
Abstract: An apparatus for setting an exposure control factor into a camera in the form of a digital signal without using a code plate or a plurality of switches. A pulse train is fed to a binary counter through an AND circuit which, upon selective receipt of gating-on and gating-off signals, operates to initiate and terminate flow of pulses therethrough respectively. When the counter has counted the selected number of pulses, the photographer who is viewing a digital display unit cooperative with the counter to detect this pulse number may actuate a button to produce the gating-off signal, thereby a corresponding desired value of the exposure control factor is set into the camera as a function of the number of pulses counted.
Abstract: The present invention relates to a camera with a displacement means for controlling the exposure amount as the function of the mechanical displacement position. The displacement means are so designed that a brush is slid over a comb-shaped conductive pattern mechanically linked with the displacement means so as to convert the displacement position of the displacement means into a pulse number.
Abstract: The present invention relates to a counter circuit for a camera in which an exposure information is converted into a number of pulses in accordance with the exposure information while a brush is moved sliding on conductor contacts, particularly to a counter circuit so designed that the influence of the pulses generated due to the chattering at the time of the contact of the brush with the conductor contacts upon the counter circuit is prevented.
Abstract: A data control device for use in recording sales transactions in regard to one or more different items which are subject to various classifications. The device includes data input registers, each of which stores a preset value for a particular item, and a data register into which a desired value for an item not frequently encountered may be entered on a manual keyboard. Selected data from the input registers are successively added and stored in an accumulator except when the keyboard is activated, whereupon data entered on the keyboard is added to the contents of the accumulator.
Abstract: A number of separate comparators compare respective analog inputs to a single reference waveform and turn off respective gates when the analog voltages achieve predetermined relationships to reference wave form. The gates pass pulses from a common source from the beginning of the reference wave form until the respective gates are shut off. In one version the analog signals represent photographic data such as diaphragm aperture and shutter speed in a camera, and are digitized for display within the camera.
Abstract: A device for preventing erroneous handling of a camera capable of dual type automatic exposure control including shutter time preference and diaphragm preference, wherein the device senses whether the camera is set at a diaphragm preference position or at a diaphragm automatic adjusting position with regard to the diaphragm setting means, and whether the shutter time preference position or the shutter time automatic adjusting position is selected for the shutter time setting means. The camera is rendered inoperative when both the diaphragm setting means and the shutter time setting means are set in their respective preference positions.
Abstract: This invention relates to photographic cameras, and more particularly to an exposure control circuit of the type in which an analog output representative of the object brightness level is converted to a digital signal which is factored into an exposure value, and the period of actuation of the camera shutter is controlled in accordance with this exposure value. Still more particularly, it relates to an improvement over this conventional type exposure control with respect to the A-D conversion. The prior art converts a voltage representative of the object brightness to a digital form by the use of an A-D converter such as of the follow comparison type which is characterized by the lack of integrating aspect in converting the input voltage to the corresponding digital signal.
Abstract: The present invention relates to an equipment which converts various data, including exposure setting data, for a photograph into codes so as to be stored in a register in order that the data stored in the register is later decoded and registered on the film. The equipment comprises a decoder for reading out and decoding the stored data in accordance with a signal corresponding to the feeding of the film and a plural number of registering heads operated by means of the output of the decoder, whereby the stored data is registered on the film in general indications such as letters or figures.
Abstract: The present invention relates to a system for exposure measurement and/or focus detection by means of image senser such as photo diode array (MOS image senser), CCD (charge coupled devices) consisting of a plural number of adjacently disposed respectively integrated fine light sensing elements whereby the image pattern of the object is scanned purely electrically in such a manner that the then obtained output of each light sensing element is converted into a digital value one after another for processing.
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: A camera in which an exposure control member is digitally controlled so as to control the exposure amount to the film plane comprising a compensating means provided for compensating the error of the exposure amount due to the response error of the operation of the exposure control member at the time of controlling the exposure control member so that the error of the exposure amount is compensated by the compensating means at the time of controlling the exposure control member.
Abstract: This invention relates to a digital exposure meter in which brightness information is digitized and exposure factors such as film sensitivity are converted to digital values to perform digital computation. Accordingly, an exposure value, average exposure value, aperture value or shutter time is derived while a computer having various operation functions being controlled in sequence by sequence control means.
Abstract: A display system for a camera of the type having shutter preselection and diaphragm preselection automatic exposure control modes which are selectively operative by a switch is provided with a single array of decimal digit display elements for displaying the numerical values of the preselected shutter speed or diaphragm aperture and of the computed result representing the effective aperture or exposure time respectively at a time in combination with control means cooperative with the mode select switch for controlling relative display arrangement of the numerical values and/or display color change, thereby it being made possible for the photographer looking the display to insure that the camera operates in the intentionally selected exposure control mode.