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Class 396/229 - Digital


Subclass of Class 396 - Photography
Definition: Subject matter in which a counter, a register, or CPU is
No. of patents: 30
Last issue date: 02/15/2011


NumberTitleIssue Date
7890553Information recording apparatus and information recording method
An information recording apparatus recording contents on a recording medium and managing the contents by using a content management file includes a control unit that checks a recording state of the recording medium loaded in the information recording apparatus to de...
02/15/2011
7251057Digital camera
A digital camera includes a CCD imager. When a display-use UYV signal is generated on the basis of an RGB signal of an object image photographed by the CCD imager, a CPU detects a color saturation degree of the RGB signal and reduces dynamic range of a U signal and ...
07/31/2007
6968058Digital evidential camera system for generating alteration detection data using built-in encryption key
A digital evidential camera system is for detecting the alteration of image data obtained by photographing an object. The system comprises the camera and an alteration detection unit. The camera includes an image pickup unit for picking up an image of the object and...
11/22/2005
5742852Photometry system
A photometric system is provided in which the value is obtained when the center-weighted photometric value and the like are determined from a plurality of separate photometric outputs is the same value that is obtained when photometry is accomplished on t...
04/21/1998
5376992Photocurrent charge type exposure measuring apparatus
An output current of a photodiode is charged in a capacitor, and the voltage change of the capacitor is monitored by a plurality of comparators. The time required for the capacitor voltage to reach a predetermined value is counted by using a clock signal ...
12/27/1994
5170205Eliminating camera-shake
An exposure control device of a camera by which an appropriate camera-shake limit shutter speed Tvf can be obtained in accordance with a focal length f of a photographing lens, and by which an arbitrary program diagram can be set on the basis o...
12/08/1992
5097262Analog-to-digital converter for camera
An analog-to-digital converter for a camera has a reference signal generating element, a measurement signal generating element, and pulse output means for generating pulses of pule durations corresponding respectively to signals from the generating elemen...
03/17/1992
5040070Solid-state image sensing apparatus for electronically controlling exposure by employing CCD as solid-state image sensing device and method of driving such CCD
In solid-state image sensing apparatus including a frame transfer type CCD 10 as a solid-state image sensing device, charges stored in a light receiving portion 11 are once discharged externally in each vertical scanning period. Thereafter, newly stored c...
08/13/1991
5006880Programmable shutter
A programmable shutter of the type wherein a shutter blade is opened and closed by means of a stepping motor. The motor is rotated in a forward direction by drive pulses of a predetermined fixed period to gradually open a sector while at the same time a l...
04/09/1991
4710014Control circuit for a programming shutter
A control circuit for a programming shutter includes a light receiving element which is always exposed to light from a subject to be photographed and a logarithmic compression device which logarithmically compresses a photocurrent flowing through the ligh...
12/01/1987
4586029Blur detecting device
A blur detecting device comprises a plurality of photo-electric converter elements which are arranged in different positions to receive light from an object and to convert quantities of light received into quantities of electricity. Electric charge storin...
04/29/1986
4500192Automatic exposure controller for a camera
An automatic exposure controller for a camera comprises an analog-to-digital converter which converts a logarithmically compressed voltage corresponding to the brightness of an object being photographed into a digital value. A central processing unit rece...
02/19/1985
4479707Exposure time reproducing device
In the disclosed exposure time reproducing device, a digitally suppressed exposure time datum is expanded by shifting the decimal part of the datum according to the contents of its integral part. The expanded datum thus obtained is read out by means of pu...
10/30/1984
4465354System and method for calculating a light information value
A system disclosed is for calculating a light information value, such as an f/stop number, which is determined by a number of light sources such as strobes. The system calculates an optimum f/stop number for each of the strobes as the strobes are fired on...
08/14/1984
4408852Automatic exposure controller for camera of TTL direct photometry type
Automatic exposure controller for camera of TTL direct photometry type forms a difference between a photometric value which is obtained by determining a fixed reflection from only a first blind surface at the initiation of running of a first shutter blind...
10/11/1983
4375321Exposure amount control device
An exposure control device for use with a set of shutter blades which form a principal opening through which an exposure is made, includes a member which forms an auxiliary opening of a predetermined aperture before the shutter release starts. Upon releas...
03/01/1983
4353629System and method for calculating a light information value
A system disclosed is for calculating a light information value, such as an f/stop number, which is determined by a number of light sources such as strobes. The system calculates an optimum f/stop number for each of the strobes as the strobes are fired on...
10/12/1982
4324462Exposure time control circuit for camera
A circuit for controlling an exposure time of a camera which operates depending on whether or not an electronic flash used with the camera is charged and ready for operation. An arithmetic operation circuit operates upon signals representing object bright...
04/13/1982
4306785Camera exposure time control circuit
A combined manual and automatic exposure time control circuit for a camera in which automatic exposure data produced through photometric techniques and manual exposure data set manually are coupled through a switching circuit to a time determination circu...
12/22/1981
4255027Exposure control device for photographic camera
In a photographic camera provided with an electric shutter speed control circuit including a light measuring circuit in which scene brightness information is log-compressed and memorized by a memory circuit, the information is log-expanded by use of a dec...
03/10/1981
4229088Exposure time controlling system
An exposure time controlling system includes a circuit for producing an APEX shutter speed signal which is applied to a first discriminator for briefly classifying the APEX shutter speed signal into four classes and also to a second discriminator for sub-...
10/21/1980
4184151Circuit for digitally processing exposure information
A circuit system designed to realize fully digitalized automatic exposure controls is provided in which the read-in brightness information is logarithmically compressed directly into a digital quantity without the aid of any diode element that exhibits a ...
01/15/1980
4139289Exposure computation circuit
The present invention relates to an exposure computation circuit by means of which a computation is carried out with the values inversely proportional to all the exposure factors excepting the diaphragm value of the APEX system so as to obtain computation...
02/13/1979
4125846Electronic exposure control apparatus
An electronic exposure control apparatus for a camera includes a setting means to set the exposure factor, a compression means connected to said setting means, for compressing the above-mentioned exposure factor logarithmically and an analogue-digital con...
11/14/1978
4117499Photographic camera with automatic exposure control
Electronic circuitry for setting or controlling either one of two exposure value factors of a photographic camera, namely, the exposure time (shutter speed) and the diaphragm aperture. The circuitry includes a comparator which receives an input responsive...
09/26/1978
4112439Digital display circuit for a photographic exposure meter
An analog-to-digital converter circuit for a photographic exposure meter includes a plurality of parallel connected transistors 51, 54, 57 and 60 whose bases are connected to the logarithmic output of a light measuring circuit A. The transistor collectors...
09/05/1978
4054887Exposure control device for photographic cameras
Exposure control device for a photographic camera wherein, in a part of the exposure control device, electronic means are provided in order to form, from the luminous density of an object, the film sensitivity, and the preselected time, a voltage analogou...
10/18/1977
4032932Automatic shutter controls for cameras
A camera is provided with a photo-responsive pulse generator for generating pulses the number of which is determined by the logarithmically converted light intensity at an object which is to be photographed. A reference pulse generator is also provided fo...
06/28/1977
3995284Automatic exposure time control circuit
An automatic exposure time control circuit for use with a camera having a shutter. A light measuring circuit for measuring the scene brightness passing through the camera lens produces an electric signal proportional to the logarithm of the scene brightne...
11/30/1976
3988069Automatic control device for cameras
This invention relates to an automatic camera exposure control device comprising a first light measuring circuit including a photoelectric element receiving light through the objective lens of the camera and generating a first output proportional to the l...
10/26/1976
 
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