Abstract: The invention provides a photosensitive device with locally adjustable exposure time, wherein means provide local modification of the integration time, for some detectors, as a function of the lighting received by each detector. In FIG. 1, these means are formed by a shift register with a series input and parallel outputs, by MOS transistors and by charge removal diodes.
Abstract: A focus detecting device comprises an image sensor; sharpness detecting means for detecting the sharpness of an image from image signals obtained from the image sensor; in-focus state identifying means for identifying an in-focus state of the image on the image sensor by comparing plural values of sharpness detected in different focus states; and focus state control means for varying the focus state during a period t at an interval T, wherein t<T, and maintaining a fixed focus state during a period T-t.
Abstract: A compact cellular telephone for motor vehicles whose outer case is a vehicle sun visor. Operating controls for placing, receiving and processing incoming and outgoing calls are large and within the driver's normal field of vision so that the invention may be operated without distracting a driver's attention from the road. Controls for placing outgoing calls are positioned in a linear arrangement across the front surface of the lower case. Controls for selecting functions, also in a linear arrangement, are positioned on the lower surface of the case in parallel relationship to the outgoing call controls. All electronic components and circuitry of the telephone are mounted on a single printed circuit board in the interior of the case. An input jack is provided on the lower surface of the case for the optional use of a driver's headset in lieu of a microphone and speaker which are mounted in the interior of the case.
Abstract: A streak tube device for electrically slitting the image of an object provided by an optical system. The streak tube device includes a streak tube body having a photoelectric conversion device for receiving the object image and producing a corresponding electron image. The streak tube device further includes focusing apparatus for focusing the electron image, electrical slitting apparatus for transmitting a selected portion, that is, slit images of the electron image, apparatus for controlling the electrical slitting apparatus, and focusing apparatus for focusing slit images on a fluorescent surface included within the streak tube body. The electrical slitting apparatus of the streak tube device includes a slit member having a slit which extends across the streak tube body, shift electrodes for vertically shifting the transmitted electron image, and a circular collimator for collimating the shifted electron image and transmitting the collimated electron image through the slit to form a slit image.
Abstract: A camera for sensing image information and accurately and quickly reducing such information to a plurality of black and white analog voltages corresponding to pixels of a line image scan. A sensor of the CCD type generates a plurality of electron packets which are read out as two analog voltages. After d.c. restoration and normalization, the analog voltages are promptly converted to gray scale digital values to preserve maximum image information for subsequent processing. Thereafter, the digital signals are reordered to correspond to the physical ordering of the photocells of the sensor and applied to a hybrid digital filter for rapid hybrid (analog/digital filter) image enhancement.
Abstract: Deleterious effects of high capacitance in large area raster scanner image tubes, especially when employed in video cameras, can be overcome by employing the following features: (1) a plurality of transparent stripe signal electrodes; (2) a unique, multiple layer, solid state structure designed to provide a Displaced Electron Layer-Sensor-Target for imaging (hereinafter DELST), with and without; (3) photoconductive gain in the DELST structure; and (4) with and without intensifier gain in the DELST structure, the proper combination of these four features makes possible the construction of video sensor devices of extraordinarily large capacitance, having rasters generated by "low or high" velocity scanning electron beams, or a laser scanning ray. The invention provides a generic approach for the selection of features and their combination with the type of scanner best suited to any one application.
Abstract: A method for reading out image information with a storage type photoelectric conversion element which operates in response to clock pulses in the mode cycle of photoelectric conversion/storage, transfer, holding, and reading out. In the photoelectric conversion/storage mode, the mode of the photoelectric conversion/storage alone is continued for a predetermined number of clock pulses and conversion tables corresponding to the output signal from the storage type photoelectric conversion element are switched in correspondence with the predetermined number of clock pulses so as to thereby obtain image information of an image having a wide dynamic range. This allows the obtaining of image information with a simple structure and at a relatively high processing speed and with a high resolution.
Abstract: The sensor 12 of a telecine projector is a charge coupled device and comprises a line of photo-sensitive elements 42 and a line of associated storge elements 44. An image form cinematographic film generates packets of charge in the elements 42 when focussed on the sensor. The charge packets may be transferred to the storage elements 44. The packets may then be shifted along the line of storage elements for reading (in serial form) by control circuitry 24. Reading takes place through an output port 26 at the end of the line.A switch 28 enables the two halves of the line to be disconnected, so that signals from only the lower half of the array can be read through the port 26, the signals from the upper half being discarded into a current sink. This reduces the clock frequency necessary to read out the signals in a set time, and enables the array to cope with normal, wide angle or anamorphic film stock.
Abstract: The transducer diaphragm includes a folded sheet of thin film material, having printed circuit conductors formed thereon in a Greek or serpentine pattern. The Greek pattern includes an odd number of spaced, parallel, printed conductor lines formed into longitudinal and transverse groups, with return conductors extending around the perimeter of the pattern to complete loops of a voice coil. The sheet is folded to form a plurality of rearwardly extending projections, with the folding being along the center lines of each of the longitudinal groups. In the preferred form of the invention, each one of the projections is generally channel-shaped throughout its length, and has a bight portion interconnecting a pair of leg portions, with a longitudinal conductor in the center of the bight and other conductors in the longitudinal group opposite each other on the leg portions.
Abstract: Slide projection apparatus including video tube apparatus arranged for receiving by direct illumination thereon, light passing through a slide and apparatus for transmitting the electrical output from the video tube apparatus to a video display.
Abstract: A distributed privacy oriented telephone extension system having up to three different kinds of privacy circuits of different capacity for coupling a respective extension phone to the telephone line. Selective user configuration of the telephone extension system effects one level of privacy control and spontaneous user control during conversation to disconnect or reconnect other phones effects a second level of user control relating to the extent of privacy achieved.
Abstract: A loudspeaker terminal strip has a generally cup-shaped, semi-cylindrical, extending portion that is press-fit into a hole formed in the wall of a speaker cabinet. The semi-cylindrical extending portion has a flat longitudinal plane formed on the cup-shaped semi-cylindrical portion that extends beyond the extension of the cup-shaped semi-cylindrical portion and acts as a flat guide wall during assembly to align the terminal strip in the hole, both radially and axially. The hole in the cabinet wall is also formed as a partial circle with a chord that corresponds in width to the width of the flat guide wall and which initially engages the flat guide wall during insertion of the terminal strip into the hole.
Abstract: An electrostatic acoustic converter having two parallel, insulating perforated plates, the inner surfaces of which are covered by electrically resistive layers, each having a signal terminal for connection to a source of sound frequency signals. Between the plates there is fixed a flexible plastic diaphragm isolated from the layers and having a terminal for connection to a source of polarizing voltage.
June 19, 1985
Date of Patent:
October 27, 1987
Zavod za Elektronni Preobrazuvatelni Elementi
Abstract: A picture tube designed for providing an electrical output includes a vacuum enclosure provided with a window transparent to the radiation to be converted to an electrical signal and a window transparent to a scanning light beam. The enclosure houses an assembly including a screen and a photocathode having a mosaic of picture storage elements, and an electron-emissive cathode for establishing a reference potential on the photocathode, an anode for collecting signal electrons, a field grid and electron optics. An external light source is used to provide a light beam for scanning the photocathode.
Abstract: Method of automatic focussing of a video pickup device having an objective and producing a digital image. According to the invention, this method comprises analyzing the image, within a window, with the aid of at least one digital operator. The digital operator takes the derivatives, in a given direction, of the contours of the image. Thereafter, the absolute values of these derivatives are computed. Finally, a quality parameter defined by the sum, in the window, of the absolute values of the derivatives is calculated. The position of the objective of the pickup device is controlled so as to maximize the value of the quality parameter.
Abstract: A defect correction apparatus includes a memory having information of image failure of a solid state imaging device, a coincidence detection circuit for detecting a position of pixel having a failure at the time of image pick up, and a failure correction circuit. The failure correction circuit includes structure for producing plural signals for correction of signals of pixels around the pixel having the failure, and structure for selecting an optimum one from the produced plural signals, for correction responding to condition of the image and signals of the pixel therearound, and to use the selected optimum signal for correction by switching for the signal of the failure pixel.
January 31, 1986
Date of Patent:
October 20, 1987
Matsushita Electric Industrial Co., Ltd.
Abstract: A circuit arrangement for suppressing interference signals on the receiving arm of a subscriber line circuit is constructed from electronic components and thus comprises no speech transformers. The receiving arm of the subscriber line circuit (SLIC) is connected to a two-pole filter circuit (ZF) which consists of the parallel arrangement of a parallel--and a series--resonance circuit (LP,CP and LS,CS), the resonance frequency of which corresponds to the frequency of the signals which are fed-in for the transmission of charge pulses and which charge pulses can manifest themselves as interference signals when reflected without the provision of the described measures.
Abstract: An automatic gain control circuit for an output signal of a magnetic earpiece of a hearing aid, which comprises a voltage source, an output amplifier stage having an input connected to the voltage source and an output connected to the magnetic earpiece, the earpiece having a working winding connected between the amplifier stage output and the voltage source, and a control loop for automatic gain control. The control loop includes a rectifier and an additional winding connected in series with the working winding of the earpiece, the windings constituting an autotransformer, the additional winding connecting the rectifier to the output of the amplifier stage and the rectifier being connected to the input of the amplifier stage.
Abstract: An electronic still camera wherein midway through an exposure the charge signals impressed by incident light on an imaging section are transferred to a storage array while the exposure continues. Corresponding signals on the imaging array and the storage arrays are differenced to form error signals which are added to or subtracted from the two original signals before they are combined.
Abstract: Image sensors comprising an alternating array of two or more sets of photoelectric devices provide enhanced detail and reproduction of intermediate illuminances. The sets of photoelectric devices are selected such that each set produces a different level of output in response to the same level of illuminance.