Abstract: A power supply circuit arrangement for electrical equipment, such as a loudspeaker with an integral power amplifier, which can be switched between an operational mode and a standby mode in response to a detected on/off signal, provides a desirable isolation of the main supply voltage from the detector. The arrangement comprises a transformer, having a primary winding and a secondary winding, and a switched impedance device between the transformer and the power supply input. The switched impedance device is switchable between high and low impedance states in response to the detected on/off signal. A control circuit for detecting the on/off signal and switching the variable impedance states is connected in common with a main circuit of the equipment to the secondary winding of the transformer, so that their respective supply voltages are both switched, in common, by switching of the impedance device. The control circuit and variable impedance device isolate the detector from the power supply.

Abstract: An injection molding apparatus for a resin structure uses gas injection. The apparatus includes a resin supply that feeds more than one resin to a mold, a gas exhaust that discharges gas supplied to the resin in order to closely contact the resin to the mold, and a supply selector that selectively opens and closes the resin supply using the pressure of the discharged gas to supply a different kind of resin onto the inner surface of a previously supplied resin.

Abstract: The present invention relates to a brushless direct current motor which includes a second magnet mounted on an inner part of the motor bush in such a way so as to allow an attractive engaging force between the bearing bush and the second magnet. Also, the BLDC motor further includes a third magnet mounted on a lower surface of a rotor yoke inserted at an upper part of the motor bush, and a fourth magnet mounted on an upper surface of a rotor yoke. This separate second magnet is provided for attractively engaging the main base for preventing any separation of the rotor unit from the main base even when the motor is flipped over or overturned, thus allowing feasible adjustment of the magnet size according to the motor requirement conditions. Additionally, head noise due to the magnetic leakage flux, needed for attractively engaging the magnet to the main base, which influences the head and other circuitry, can be effectively reduced.

Abstract: According to the invention, an electronic device mounted on a substrate is encapsulated using a standard two-piece mold. A novel degating region is formed on a surface of the substrate to allow removal of excess encapsulant formed on the surface during molding without damaging the remainder of the device. The material of the degating region that contacts the encapsulant forms a weak bond with the encapsulant, relative to the bond formed between the encapsulant and the substrate, so that the encapsulant can be peeled away from the degating region without damaging the substrate or other portion of the device. The degating region is provided without introducing additional steps into the process for forming the device. The presence of the degating region eliminates the necessity of using a three-piece or modified two-piece mold to achieve top gating in order to degate without damaging the device. In one embodiment, the degating region is made of gold.

Abstract: The radiation shielded and packaged integrated circuit semiconductor device includes a lid secured to a base to enclose the integrated circuit die within, wherein the lid and the base are each constructed from a high-Z material to prevent radiation from penetrating therethrough. Another embodiment includes a die attach slug constructed from a high-Z material disposed between the integrated circuit die and a base, in combination with a high-Z material lid to substantially block incident radiation.

Abstract: A printer providing time coded heating energy applications to printhead resistors to provide variable volmetric densities. Variable densities can also be provided through integrating dithering with the varying of volumetric densities. The printer can provide either one of two kinds of printing technologies by selection.

Abstract: A deflection waveform correction signal generator comprises a multiplying circuit for generating a pincushion correction signal. A horizontal frequency ramp is generated by a clipped retrace pulse. The ramp generator has an output coupled to an integrating circuit for generating a parabolic shaped signal. The ramp generator and ramp integrator are reset at a horizontal rate by reset pulses of differing duration. The different duration of reset pulses results in the parabolic signal having regions of non-parabolic shape. The parabolic shaped signal is coupled to an input of the multiplying circuit. A control circuit is coupled to the parabolic shaped signal for maintaining a peak amplitude thereof by controllable coupling to the ramp generator. A control loop is coupled to the integrator for controlling an integrator input bias current to generate the parabolic shaped signal at a predetermined time interval.

Abstract: A digital filter (20,30) separates an M-bit (12) chrominance component (C12) from an N-bit (8) digital composite video signal (CV) supplied thereto, M (12) being greater than N (8) due to arithmetic operations (24,44,46,50) required for the separation. The separated M bit chrominance component is reduced to N-bits and subtracted from the composite video signal to provide a separated luminance component. For bit reduction, the separated chrominance component (C12) is subjected to symmetrical rounding (100A or 100B and 104) and limiting (104). Advantageously, symmetrical rounding of the chrominance component provides reduces a tendency for the luminance component to exhibit contouring when displayed.

Abstract: Multipurpose projector having a detachable projecting unit including a body having a sheet of transparent glass disposed in the top part thereof and an attaching recess at one side of an optical system region therein; a projecting unit attachable into the attaching recess or disposable right over the transparent glass by means of rotatable post attached to the body at the user's option; a liquid crystal display projector part having a light source disposed movably in a vertical direction in rear part of the optical system in the body, a first focusing lens for focusing the light emitted from the light source, a liquid crystal panel for receiving light focused by the first focusing lens, and a zoom lens; an overhead projector part disposed in the optical system in the body having a second focusing lens, a plurality of total reflection mirrors for deflecting a path of the light focused by the second focusing lens at a right angle from a horizontal direction to a vertical direction, and a Fresnel lens detachably

Abstract: Disclosed is a passive, highly efficient, low noise coupling device that includes a balun and noise reduction circuitry uniquely configured for converting an unbalanced video signal on a 75 ohm transmission line or connector to a balanced signal on a 100 ohm transmission line or connector and vice versa. The device efficiently allows use of a 100 ohm unshielded twisted pair, such as a conventional telephone cable, for multiplex transmission of video signals or the like in the frequency range of 50 to 500 megahertz. The preferred embodiment has a circuit board with a 75 ohm unbalanced side and a 100 ohm balanced side separated by a balun having a toroid core with a very high permeability. A common mode choke for noise rejection is inserted in the balanced side. The choke has a dual toroid core, one core of high permeability and one of low permeability, and has windings with a 100 ohm characteristic impedance. A common mode toroid shunt on the device's balanced side provides further noise reduction.

Abstract: A high speed teleconferencing apparatus and method, the apparatus including interface means for receiving a first analog signal and outputting a first digital signal, encoding means for encoding and compressing the first digital signal to produce a first compressed encoded signal, multiplexing/demultipexing means for receiving and splitting the first compressed encoded signal into at least two split compressed encoded signals, at least two converting means for receiving a respective one of the at least two split first compressed encoded signals and respectively producing at least two first synchronous signals, and at least two CCIT units for receiving a respective one of the at least tow synchronous signals and respectively outputting at least two high speed first synchronous signals to a high speed data link.

Abstract: Disclosed is an audio transmission device for mounting in a monitor of a computer system and including a pair of symmetric frameworks mounted behind a front frame of the monitor at two lower or upper corners thereof so that a distance left between the pair of frameworks is about a width of a system board disposed inside the monitor. The framework each further includes a fixing arm formed at an inner side with a longitudinal groove which has a width slightly larger than a thickness of the system board to clamp the same between the pair of frameworks, a connecting arm extended from one side of the fixing arm, a resonant cabinet connected to the fixing arm via the connecting arm, and shock-absorbing arms extended from two side walls of the resonant cabinet for locking to the front frame of the monitor. The resonant cabinet is partitioned inside it to form a high-tone and a low-tone guide paths. The high-tone guide path is formed at a base portion with supporting grooves for a speaker to mount thereon.

Abstract: A shielded modular adapter adapts one type of connector to another and provides electromagnetic shielding therein in order to reduce radio frequency interference and adjacent signal line interference. The shielded modular adapter may include electromagnetic filters to further reduce electromagnetic radiation. Additionally, the shielded modular adapter is user programmable or selectable by inserting pins into the appropriate holes within a connector and snapping the connector in place.

Abstract: In a compressor for adjusting a cooling power such that a piston integrally formed with an oscillator according to the oscillation of said oscillator adjusts the amount of refrigerant absorbed into a cylinder, a cooling power controller for the compressor which can control the cooling power by varying the power itself to change the operation state of the compressor for controlling the temperature of a refrigerator or an air conditioner, includes a power source for varying input alternate power to output the same through a plurality of secondary ports, an applied voltage controller for selecting the secondary port voltage of the power source to control the cooling power of the compressor, and a comparator for comparing a predetermined temperature with the actual temperature of an heat exchanger to control the applied voltage controller.

Abstract: This invention relates to an adhesive composition, comprising: (A) at least one multifunctional epoxy; and (B) the composition derived from (B-1) at least one difunctional epoxy resin and (B-2) at least one compound represented by the formulaR--(G).sub.n (1)wherein in Formula (I): R is an aromatic, alicyclic or heterocyclic group; G is a functional group selected from the group consisting of COOH, OH, SH, NH.sub.2, NHR.sup.1, (NHC(.dbd.NH)).sub.m NH.sub.2, R.sup.2 COOH, R.sup.2 OH, R.sup.2 SH, R.sup.2 NH.sub.2 and R.sup.2 NHR.sup.1, wherein R.sup.1 is a hydrocarbon group, R.sup.2 is an alkylene or alkylidene group and m is a number in the range of 1 to about 4; and n is a number ranging from 3 up to the number of displaceable hydrogens on R; with the proviso that when at least one G is NH.sub.2 or R.sup.2 NH.sub.2, n is a number ranging from 2 up to the number of displaceable hydrogens on R, and when at least one G is (NHC(.dbd.NH)).sub.m NH.sub.

Abstract: A VCR or laserdisc player includes circuitry for detecting a code provided by VCR tapes, tape cassettes, or laser videodiscs, which indicates that the material recorded on the videotape or videodisc has been recorded in a compressed fashion to enable proper playback on a 16.times.9 television receiver. In response to detection of this code, the VCR or laserdisc player applies a DC signal to the chrominance output terminal of its S-Video connector. Circuitry in the television receiver detects the DC signal on the chrominance terminal of its S-Video input connector, and controls a wide-screen processor to expand the image by displaying it over the entire width of the 16.times.9 display screen.

Abstract: A highly integrated semiconductor package having a light and compact construction and heat dissipating means suitable to effectively dissipate heat generated from the package during the operation of the package is disclosed. The semiconductor package has a lower heat sink for dissipating heat generated from a semiconductor chip of the package. The package also has a tape attached to the top of a plurality of inner leads of the package. The inner leads are attached to the top surface of the lower heat sink. The package further has a heat dissipating means for dissipating heat generated from the inner leads. The heat dissipating means has a heat bar attached to the tape. An upper heat sink may be integrated with the heat bar so as to form the heat dissipating means.

Abstract: An interconnect between a conductor and a transistor body above a gate electrode is established by forming a conductor separated and alongside a gate electrode. Both the conductor and the gate electrode are coated with a dielectric material such as silicon dioxide. The silicon dioxide layer is subsequently coated with a thin layer of polysilicon and a contact hole is photolithographically etched through the polysilicon layer and through the silicon dioxide layer to establish a contact hole to said conductor. The polysilicon layer protects the silicon dioxide layer from impurities in the photolithography process. After the photolithographic mask is removed, a second layer of polysilicon is deposited on the first layer of polysilicon, coating the polysilicon layer and partially filling the contact hole, establishing a contact between the combined polysilicon layers and the conductor.

Abstract: There is disclosed a two-wire (series connectable) delay-on-release timer apparatus for air conditioner compressor motors or the like which is connectable in series in one side of the alternating current circuit with a low voltage alternating current source, a thermostat switch with a shunt resistor acting as an anticipator heater and a relay, or other control, for applying power from the power main to an air conditioner compressor or the like. The timer includes a full-wave rectifier circuit with output connected to an adjustable time delay digital timer and also connected to a gated thyristor whereby turning the thyristor on greatly reduces electrical impedance between the input terminals of the rectifier circuit. A digital timer IC is provided with circuit elements for sensing the difference between thermostat switch closed and thermostat switch open conditions.

Abstract: An on-screen display suitable for a graphic on-screen display is disclosed. The on-screen display method according to the present invention includes: step of graphically displaying OSD menus by generating font addresses for the graphic to be displayed after initializing the rows and columns constituting the graphic, upon inputting of the menu key; step of inversely displaying the relevant block by designating the address through the user's selection of the position control keys; and step of accessing to the menu work area for the relevant menu by inputting an enter key after the designation of the block, thereby performing the operation of the menu selected by the user.