Showing papers by "Panasonic published in 1981"

Image display apparatus of liquid crystal valve projection type

Abstract: A liquid crystal light valve projection type image display apparatus comprises an electro-optic element and a Schlieren optical system. The electro-optic element has a liquid crystal layer having a dielectric and optical anisotropy. An electric field having a spatial intensity distribution according to an image signal is applied to said liquid crystal at a spatial period, so that a spatially phase-modulated phase diffraction grating is formed in the liquid crystal layer. Thus, a projected image in enlarged form is obtained. The fact that the electric field with a spatial period is applied to the liquid crystal leads to a constant light diffraction angle, and the modulation of the diffraction light intensity in the applied electric field enables an image corresponding to the input image signal to be projected at high light utilization.

Complementary channel type MOS transistor exclusive OR/NOR logic gate circuit

Abstract: The present invention relates to logic gate circuits of digital integrated circuits, particularly for the purpose of constituting gate circuits for realizing XNOR (Exclusive NOR) or XOR (Exclusive OR) circuits composed of CMOS (Complementary MOS), it is to offer complementary gate circuits in which the number of included transistors is reduced largely from that of conventional circuits.

Optical information reading device

Abstract: An optical information reading device adapted to apply a light beam from a light source to an information carrier having information recorded thereon as convexities and concavities or variations in a light reflecting factor, and to receive the light reflected from the information carrier, thereby to read the information. A specific arrangement of optical elements such as a beam splitter, lens, and reflecting mirror enables the information reading device as a whole to be reduced in size particularly in length in the direction perpendicular to the plane of the information carrier.

Solid-state color-image sensor and process for fabricating the same

Abstract: In a step for bonding a color filter to a solid-state color-image sensor chip with an adhesive which is curable not only by light or more particularly ultraviolet-ray irradiation but also by heating, pre-curing or partial curing is effected by irradiating light rays after the color filter and the chip has been pressed against each other and correctly aligned with each other in a bonding device and then the chip with the partially-bonded color filter is removed from the bonding device and complete curing of the adhesive is accomplished by heating. According to one embodiment of the present invention the bonding step is carried out in an atmosphere containing the oxygen so that the adhesive which has been squeezed out from the space between the color filter and the chip may be prevented from being cured and subsequently removed in a simple manner. According to a further embodiment of the present invention, prior to the bonding step, the color filter and chip are covered with protective layers or films so that surface flaws may be avoided. Thus, the color filters can be bonded to the chips with a higher degree of accuracy and a higher degree of adhesive strength and the mass production of solid-state color-image sensors can be much facilitated.

Oral cavity cleaner

Abstract: An oral cavity cleaner including a pump unit for supplying a pulsating stream of high-pressure fluid, and a toothbrush unit connected thereto via a flexible conduit. The toothbrush unit includes an actuating member responsive to the pressure of the pulsating stream of fluid to provide a reciprocatory movement, a toothbrush connected to the actuating member, a valve section brought to an open position when the movement of the actuating member has exceeded a predetermined value, and an operating member for operating the valve section. The toothbrush can be automatically given a reciprocatory movement, and the high-pressure fluid can be ejected through the toothbrush or its ejection can be stopped as desired by manipulating the operating member while the toothbrush is being moved with a reciprocatory movement.

Liquid atomizer including vibrator

Abstract: An apparatus for atomizing a large quantity of liquid such as water, liquid fuels, lotions or the like, comprises an atomizer including a body having a pressurization cavity for containing a liquid. A nozzle base, mounted on the body, has a plurality of orifices communicating with the pressurization cavity. An electric vibrator, mounted on the body, responds to an alternating voltage derived from an electric circuit. The vibrator is vibrated back and forth, to expel successively a large quantity of liquid droplets of small and uniform diameter out of the orifices.

Voltage-dependent resistor

Abstract: A voltage dependent resistor which has a zinc oxide sintered body which itself has voltage dependent properties. The resistor is made by the steps of: (1) providing a formed body of a powder mixture having, as a major part, zinc oxide and additive; (2) coating on the side surfaces of the formed body a paste having as the solid ingredient composition, at least one member selected from the group of (a) more than 50 mole % of silicon dioxide (SiO2), and less than 50 mole % of bismuth oxide (Bi2O3), (b) the same composition as that of said additive, (c) more than 30 mole % of antimony oxide (Sb2O3) and less than 70 mole % of bismuth oxide (Bi2O3), and (d) more than 50 mole % of indium oxide (In2O3) and less than 50 mole % of bismuth oxide (Bi2O3), (3) sintering the coated body; and (4) applying electrodes to opposite surfaces of the sintered body.

Positive-temperature-coefficient thermistor heating device

Abstract: A positive-temperature-coefficient (PTC) thermistor heating element in which joints between metal heat radiating means and the electrodes on a positive-temperature-coefficient thermistor element are attained only with an electrically insulative adhesive in such a way that prior to and during the curing step, the heat radiating means are pressed against the electrodes to establish thereby electrical contacts at least partially between them. The heat radiating means also function as current paths to and out, respectively, of the thermistor element. The PTC thermistor heating device is simple in construction and easy to fabricate at less cost yet has a high and stable thermal output.

Deep Impurity Levels in InP LEC Crystals

Abstract: Deep impurity levels in InP LEC single crystals have been investigated by deep-level transient spectroscopy (DLTS) and photoluminescence (PL) measurements. The effects of heat treatment on DLTS and PL signals have been investigated, the results indicating that a deep impurity level whose emission activation energy is 0.42 eV is closely related to the well-known PL emission band at 1.1 eV. It seems that these DLTS and PL signals originate from a certain complex including P vacancies and defects, since some behaviours of these signals can be well explained by a configuration-coordinate model. Two other deep levels with emission activation energies of 0.31 and 0.60 eV have also been observed. The origin of these deep impurity levels might be due to native defects in the InP LEC crystals.

Arc scan transducer array having a diverging lens

Abstract: An ultrasonic transducer array for arc scan imaging systems comprises a plurality of elongated piezoelectric transducers arranged successively to define a convexed energy radiating surface A plano-concave acoustic diverging lens is attached to the convexed surface to diverge the acoustic energy transmitted from the transducers in an increased steering angle The transducers are assembled on an impedance matching layer which defines the convexed radiating surface The acoustic impedance of the diverging lens is substantially equal to the acoustic impedance of the human body, while the acoustic impedance of the impedance matching layer is greater than that of the human body

Method of and apparatus for manufacturing ultrafine particle film

Abstract: A method and apparatus for manufacturing an ultrafine particle film which has great practical utility when deposited on an appropriate substrate. The particle film is produced from various ultrafine particles of, for example, metals, oxides, nitrides and carbides, and is produced uniformly, effectively and efficiently with a high degree of reproducibility. According to a first method, an atmosphere at a gas of a reduced pressure is formed in a vessel, and a forced flow of the gas is formed unidirectionally from an evaporation source to the substrate, so that the evaporated matters from the evaporation source are forced to move together with the forced flow of the gas, so that ultrafine particles which are formed through interaction between the evaporated matters and the gas deposited on the substrate thereby forming the ultrafine particle film. According to a second method, the evaporation source is disposed within a vessel of having a reduced gas pressure as well as a cylinder surrounded by a high-frequency coil. As the coil is energized, the gas in the cylinder is excited. The evaporated matters are forced to flow through the excited gas atmosphere so that ultrafine particles formed by an interaction between the evaporated matters and the excited gas are deposited on the substrate thereby forming the ultrafine particle layer. A third method is a combination of the first and second methods.

Optical disk having an index mark

Abstract: In an optical recording disk having groove-like guide tracks, a rotation index mark is provided to indicate a rotation starting point where the rotation index mark is constructed of a grooved-like phase structure. The rotation index mark may be formed in a track which is located separated from the information recording tracks, and may be detected optically without using a laser light beam. The rotation index mark is used to control the rotation of the disk as well as writing and reading operation of an optical disk recording/reproducing apparatus so that various information, such as video signals, can be accurately recorded and reproduced. In the case of recording digital signals, the guide tracks may be divided into a plurality of sector regions, and sector index marks corresponding to respective sector regions may also be formed together with the rotation index mark. Furthermore, an address index mark indicative of the position of track address region radially formed in the guide tracks may also be added.

Apparatus and method for recording, reproducing and erasing on optical recording discs

Abstract: An apparatus for recording, reproducing and erasing for an optical recording disc capable of recording information data with a high density, and capable of recording new information data and simultaneously erasing the previously recorded information data.

Microwave oven having controllable frequency microwave power source

Abstract: OF THE DISCLOSURE A microwave oven comprising a heating cavity, a controllable frequency microwave power source, a detector for detecting the intensity of electric field in the cavity and control means for setting the microwave power source at the frequency as determined by the intensity of electric field. The frequency at which the loaded cavity is energized is selected by the control means to store high power in the cavity. The cavity has the dimensions for generating only the TEm?p mode at the frequency of the microwave power source being limited to 915 + 13 MHz, where ? is the mode index in the direction of height of the cavity.

Induction heating cooking appliance

Abstract: An induction heating type cooking appliance is adapted to heat a pan by induction heating. An input unit includes touch control keys and has a timer function so that the power supply is turned on only when at least two keys are actuated properly within a given length of time. Alarms are operatively associated with the timer function so as to alert the operator automatically when the pan is shifted or the appliance is operated under a no-load condition. Such an induction heating type cooking appliance therefore enjoys a high degree of safety.

Automatic temperature control device for an electric appliance such as an electric blanket

Abstract: The automatic temperature control device for an electric appliance such as an electric blanket comprises a heater element, a sensor made of a thermosensitive material having an impedance, which changes as the temperature varies, for detecting the temperature of the heater element, switching means for regulating the supply of electric power to the heater element, and a plurality of electric circuits for driving the switching means in response to the output signal from the sensor. The plurality of electric circuits function to prevent the sensor from being polarized and to detect a temperature signal by applying thereto an alternating current, to detect a failure occurring in the electric circuits in synchronism with zero-crossing pulses, and to detect a failure occurring in the switching means, thereby assuring a safe operation of the automatic temperature control device against the occurrence of any failure.

Sound reproducing system having sonic image localization networks

Abstract: In a sound reproduction system having two loudspeakers (1,1b) located in front of a listener, an input audio signal is divided into a plurality of channel signals which are respectively applied through voltage adjusting devices (3) to the front loudspeakers and also to additional speakers (1c, 1d) or localization networks (15) to generate additional real or phantom sound sources at ±90 degrees to the normal to the listener. The additional sound sources and the front loudspeakers are located symmetrically with respect to the listener. By manual operation of the adjusting devices a sonic image can be localized at any point in the front half plane. Continual operation of the adjusting devices causes the localized sonic image to be moved continuously within the localizable area.

Method of manufacturing artificial wood veneer

Abstract: A method of manufacturing artificial wood veneers comprises a step in which an artificial flitch formed of laminated material veneers respectively cut out of a certain kind of inexpensive natural wood is sliced in the direction of obtaining straight grain pattern to obtain a collected veneer in which mutual joining surfaces of the material veneers extend in parallel with each other and in the thickness direction, and a step in which many of the collected veneers thus obtained and material veneers cut out of another kind of natural wood are laminated, pressed and collected to form another artificial flitch which is sliced in a direction of obtaining a flat or flowered grain pattern which is very similar to that of a high grade natural wood.

Optical disk, high density optical disk system, and high density recording/reproducing method using the optical disk

Abstract: An optical disk recording and reproducing system which uses an optical disk at least one side of which is formed with a spiral groove which has a V-shaped or inverted-trapezoid-shaped cross sectional configuration. Both the radially inward and outward sloped faces of the groove are used as recording tracks which are tracked or scanned with the spot of a light beam in the case of recording or reproduction.

Air pressure shock absorber

Abstract: An air pressure shock absorber for smoothly stopping a moving object reciprocated by a rod in an air pressure cylinder. The shock absorber absorbs and reduces the internal pressure of a chamber in the cylinder to smoothly stop the moving object by the communication of air compressed in the chamber to the atmosphere through a bypass passage formed in a cylinder wall. The air pressure is released to the atmosphere after the piston has moved through a predetermined stroke.

Display processor for superimposed-picture display system

Abstract: A display processor for a raster-display type system comprising a display memory with the capacity of storing at least one page of video information to be displayed over the screen of a cathode-ray tube and a cathode-ray tube (CRT) control circuit which divides the frequency of the externally applied clock pulse to generate the address signal and the vertical and horizontal sync signals, the address signal being applied to the display memory while the vertical and horizontal sync signals are applied to the CRT display device. The present invention further adds a comparator which compares the external vertical synchronizing signal with the internal vertical sync signal and a sync circuit which responds to the output from the comparator to permit or inhibit the passage of the external clock pulse to the CRT control circuit. A plurality of such display processors are used and can be synchronized in operation so that a plurality of pages of video information can be displayed in mutually superimposed relationship on the same face of a cathode-ray tube, whereby versatile displays can be presented.

Magnetic recording and/or reproducing system for television and audio signal

Abstract: A two speed or multi-speed video tape recorder of the conventional helical scan type in which the audio signal is capable of being recorded as a time compressed signal at one end of each helical video scan, or alternatively, in conventional longitudinal fashion by means of a stationary magnetic head engaging one edge of the tape. At low tape transport speeds, improved bandwidth (and therefore sound fidelity) is obtained by use of the time compression technique; while at higher transport speeds, there are advantages in utilizing the stationary audio head. Circuitry is provided to automatically utilize the time compression technique at lower tape transport speeds and the stationary head longitudinal recording technique at higher tape transport speeds. A pilot or cue signal is recorded on the tape, to automatically control the reproduction circuitry so that both types of recording methods can be interchanged on the same magnetic tape, with the reproducing circuitry switching accordingly between the two modes, as required.

Induction cooking apparatus having cooling arrangement therefor

Abstract: An induction cooking apparatus having a plurality of induction heating coils disposed in an array for induction-heating a metallic heating load by electromagnetic induction. Air inlet ports are formed at the front end of the appliance to admit cooling air for cooling the interior of the cooking appliance and air outlet ports are formed at the rear end of the appliance. The apparatus ensures comfortable cooking without exposing the user to hot exhaust air and, also, better cooling without drawing in hot exhaust air or hot steam from the food materials. Furthermore, a partition is provided within the appliance for separating the power converter unit from the operating unit for blocking objectionable movement of cooling air and blocking induction radiation from the power converter unit so as to protect the operating unit from the induction radiation from the power converter unit and prevent faulty operation thereof, and a cooling fan is disposed in an orifice in the partition for circulating cooling air within the appliance and ensuring an efficient cooling performance.

Oxygen enriched gas supply arrangement for combustion

Abstract: An oxygen enriched gas supply arrangement for combustion which is so arranged that, by supplying air to a selective air permeating membrane cell, the flow rate and/or oxygen concentration of the oxygen enriched gas passing through the selective gas permeating membrane cell are controlled to predetermined conditions required for the combustion. The arrangement further includes devices for maintaining the humidity in the oxygen enriched gas thus obtained at a constant level and for removing pulsation therefrom, whereby a particularly suitable air supply source for various combustion equipment and apparatuses can be obtained.

Cable television transmission control system

Abstract: A control system for a cable television transmission line which has functions of collecting and controlling data. Information is collected by generating an instruction and transmitting same to a microcomputer by space communication. Furthermore, the operating conditions of a remote cable television line amplifier can be changed by generating an instruction from the microcomputer.

Electroosmotic ink recording apparatus

Abstract: A novel ink printing apparatus utilizes electroosmotic force on a face of dielectric substance substrate 10 between a needle shaped recording electrode 20 and a ring shaped auxiliary electrode 30. When a voltage of a suitable polarity is applied between the electrodes 20 and 30, a fluid ink (of solvent ink) 40 laid on the dielectric substrate 10 to range from the electrodes 30 to 20 travels by the electroosmotic force and makes protrusion 41 on the end tip 20' of the recording electrode 20. By applying a high voltage between a counter electrode 60 behind a recording paper 50 and the recording electrode 20, the fluid ink 41 flies to the recording paper.

Light source intensity control in an optical recording and reproducing apparatus

Abstract: An optical information recording and reproducing apparatus for optically recording and reproducing information on and from a disk-shaped information carrier having a guide track is disclosed. A digital track address prerecorded on the guide track is reproduced and the intensity of a recording laser beam is controlled by the reproduced digital track address so that the exposures of the recording laser beam at an inner periphery and an outer periphery of the disk-shaped information carrier rotated at a constant rotation speed are corrected to enable an optimum recording over an entire surface of the disk-shaped information carrier.

Picture image display apparatus

Abstract: A picture image display apparatus has a flat type vacuum enclosure having a transparent face panel. A row of parallelly disposed linear thermionic cathodes are provided with an electron beam extractor electrode which produces a predetermined number of two dimensionally disposed electron beams out of the electron emission from the linear thermionic cathodes. A row of control electrodes is disposed parallelly in a direction perpendicular to those of the linear thermionic cathodes. A row of vertical deflection electrodes and a row of horizontal deflection electrodes are provided. A phosphor screen formed on the inner force of the face panel has an anode of thin metal film formed on its surface. A horizontal deflection signal generator issues a horizontal deflection signal having, in 1 cycle, a first scanning period wherein voltage increases and a second scanning period of the same length wherein voltage decreases. In both of the first and second scanning periods control signals are applied to the control electrodes to produce image spots in both scanning periods.

Magnetic recording media

Abstract: A magnetic recording medium of the type in which a thin magnetic film mainly comprising Co; Co and Ni; Co and Cr; or Co, Ni and Cr is deposited on a nonmagnetic substrate (1); the thin magnetic film comprises a surface layer adjacent to the native oxidized layer at surface and a deep layer below it; and the average oxygen content in the surface layer is greater than that in the deep layer

Piezoelectric relay with oppositely bending bimorphs

Abstract: The invention relates to a piezoelectric relay in which a bimorph is used as a flexible element. First, second and third relay contacts (14), (14') and (14") are disposed coplanar with the third relay contact sandwiched between the first and second relay contacts. First and second flexible members (11) and (11'), each of which is supported as a cantilever, are displaced in directions opposite to each other when an electric field is applied to one. The first flexible member (11) displaces the first and second relay contacts (14) and (14'), and the second flexible member (11') displaces the third relay contact (14"). Thus, the first and third relay contacts (14) and (14") and the second and the third relay contacts (14') and (14") are turned on or off in response to the different polarities of the applied electric field.