Abstract: The present invention provides a worldwide compatible switching power supply unit of an RCC system in which by reducing the number of components or parts, reduction of cost can be realized and the mounting space can be reduced. In a high input voltage and in a light load, an inductance of a primary winding of a transistor is set high but in the range of not exceeding a rated value of a main switching element, and in a low input voltage and in a heavy load, an inductance of a primary auxiliary winding and values of a control resistor and a capacitor of the main switching element are set low but in the range of not deteriorating the starting characteristics of the main switching element.

Abstract: A video recorder housing has a pivoting gate to open and close the cassette slot of the video recorder. The pivoting gate has a movable hook secure to its rear side. When a video cassette is inserted into the cassette slot to be loaded into the housing, the movable hook partially appears from the lower edge of the pivoting gate, and the pivoting gate remains partially open with the protruding hook resting on the upper surface of the video cassette. The partially open pivoting gate exposes the label of the video cassette to be seen from the outside.

Abstract: Disclosed is an improvement in a tape guide device having an inclined post and a guide roll rising upright on its base for guiding and directing a length of recording tape to the rotary drum on the deck of a video recorder. The base is made of a synthetic resin material, and has an axle hole made therein for press-fitting the axle of the guide roll. The upper end of the axle hole is tapped, and the axle hole has at least one rib projecting inward from its inner circumference. The axle is threadedly engaged with the upper end of the axle hole, and is press-fitted in the axle hole with the rib or ribs pressed and slightly deformed. Thus, the axle can be positively held in the axle hole of the base, preventing the guide roll to shake in the axle hole, still permitting adjustment of the height of the guide roll. Thanks to such ribs the tight insertion of the axle in the axle hole is assured without the necessity of machining or molding with high precision.

Abstract: Disclosed is an improved video recorder housing having a main-and-auxiliary pivoting gate assembly to open and close its front cassette slot. The housing has a chamfered cassette guide extending inward from the lower edge of the cassette slot. The housing has a horizontal pin positioned inside and above the cassette slot. The main gate is attached to rotate about the horizontal pin and is spring-biased toward its closing position. The main gate has a sub-horizontal pin and an inverted “L”-shaped lever both operatively connected to control the degree of opening of the auxiliary gate. The auxiliary gate is spring-biased toward its closing position, and can be rotated about the sub-horizontal pin while the inverted “L”-shaped lever rolls on the ceiling of the housing. With this arrangement, the main gate is kept half open with its lower edge caught by the upper surface of a videocassette loaded inside the video recorder.

Abstract: Disclosed is a reset mechanism for use in an electric device equipped with a microcomputer having a reset circuit associated therewith. An insulating housing of the electric device has a small through hole provided therein, and chassis of the electric device has a small through hole provided therein and in alignment with the small through hole of the insulating housing. A reset terminal of the reset circuit is placed behind the small through hole of the chassis of the electric device. The microcomputer can be reset simply by inserting a metal rod into the two through holes as far as the reset circuit.

Abstract: In a high-speed tape winding operation of a magnetic recording and reproducing apparatus, stable tape-stopping operation without generating any damages of the tape. In addition to the mechanical braking means, a reverse braking force is applied to a drive motor for rotating reels depending on the tape conditions so as to diminish the rotation inertia of the drive motor and dispense with a strict operation timing and precision of the mechanical braking means.

Abstract: Disclosed is a cabinet structure for a magnetic tape recorder having a rear-and-bottom structure to which a deck of the magnetic tape recorder is to be fixed. At least selected part or parts or the whole of the rear-and-bottom structure are of a sheet of metal capable of providing a shielding effect.

Abstract: An in-line electron gun for a colored cathode ray tube has an electronic field correction plates with a central key-hole shaped aperture with two opposite straight lines and two side apertures each with a plurality of vertical and horizontal in addition to a plurality of circular arcs of different radii.

Abstract: The present invention provides a method of manufacturing an electroconductive antireflection film and a glass faceplate having the film of high electroconductivity, excellent antireflection characteristics and electromagnetically shielding characteristic with very high sticking strength and film hardness, etc., and formed at the lower manufacturing cost and in the simple manufacturing method. The method comprises the steps of: dissolving in alcohol an aqueous solution of organic polymer containing polyethylenedioxythiophene which polystyrenesulphonate is doped to; adding silicon alkoxide to the alcoholic solution for reinforcing adhesion; preparing an organic polymeric electroconductive solution by adding pure water and a basic catalyst for hydrolysis; and applying the electroconductive solution on the image display glass plate, thereby forming the polymeric electroconductive film as an antireflective film.

Abstract: An image display faceplate and its manufacturing method wherein an electroconductive organic polymeric transparent anti-static film is formed on the image lay faceplate by the steps of obtaining an aqueous solution by solving electroconductive organic polymers in water, applying the solution and heat-treating the applied faceplate panel at a relatively low temperature, and the solution are disclosed. The aqueous solution is prepared by the steps of: dissolving in alcohol an aqueous solution of polyethylene dioxythiophene which polystyrene sulphonate is doped 3 to; first-adding silicon alkoxide to the alcoholic solution; and second-adding pure water and an inorganic acid catalyst for hydrolysis after the first adding step.

Abstract: A structure of barrier ribs in the plasma display panel is provided. The structure of barrier ribs in a plasma display panel is characterized by comprising at least one barrier rib of a half-matrix shape 35 to 37 and 45 to 48 in which protrusions 38, 39 and 49 are formed between the barrier ribs, thereby being capable of complementing the different emission characteristics among the three kinds (R, G, and B) of phosphors to be used in the plasma display panel with improving the whole luminescence and a white balance, simplifying processes of manufacturing it, and enhancing working steadiness and the reliability of the post process.

Abstract: A plasma display panel (PDP) is capable of directly and effectively removing impurities from a discharging space for enhancing the purity of a discharging gas. The PDP has a getter layer formed of at least a portion of a barrier rib. The getter layer is independently formed at an upper portion of each barrier rib with respect to each discharging cell or maybe formed to cross each other at every other cell with respect to the discharging cells formed in a direction in which the barrier ribs extend. The getter material particles are dispersed in an insulation material so that the getter layer has an electrical insulation characteristic.

Abstract: A method of displaying a halftone image on a PDP display unit by using a frame division technique, the method comprising selecting display lines whose number is identical to the total number of said divided subfields, addressing for designating pixels of selected display lines to be displayed and displaying each subfield allocated for the said selected display lines; shifting by a predetermined number of display lines from said selected display lines for at least a sustain pulse period unit, selecting display lines, addressing for designating pixels to be displayed and displaying each subfield allocated for the said selected display lines; and repeating said shifting, said selecting, said addressing and said displaying steps until each of the subfields is completely displayed for all display lines; wherein display lines for which all subfields of one frame have been completely displayed for an idle period.

Abstract: A method of displaying a halftone image on a PDP display unit by using a frame division technique, the method comprising selecting display lines whose number is identical to the total number of said divided subfields, addressing for designating pixels of selected display lines to be displayed and displaying each subfield allocated for the said selected display lines; shifting by a predetermined number of display lines from said selected display lines for at least a sustain pulse period unit, selecting display lines, addressing for designating pixels to be displayed and displaying each subfield allocated for the said display lines; and repeating said shifting, said selecting, said addressing and said displaying steps until each of the subfields is completely displayed for all display lines; wherein display lines for which all subfields of one frame have been completely displayed for an idle period.

Abstract: Disclosed is an improvement in a record player for turning the information stored on a cassette tape or a compact disc back into the original forms including a recording medium loading mechanism and an associated loading motor. It comprises means responsive to insertion of the recording medium for rotating the loading motor, thereby allowing it to generate the counter electromotive force, and a detection-switching device responsive to generation of the counter electromotive force for changing its conductive condition. Then, the loading motor is allowed to start and pull in the cassette or compact disk until it has been put in the loading position.

Abstract: The present invention provides a gray level display AC-type PDP driving method comprising (a) dividing a single image frame into n number of subframes, each of the subframes having predetermined number of sustaining pulses; (b) selecting scan electrodes whose number is identical to the number of said subframes, assigning specific subframes to said selected scan electrodes, sequentially providing scanning pulses having different phases on said selected scan electrodes and applying addressing pulses on said data electrodes in order to designate pixels to be displayed, and alternately supplying the predetermined number of sustaining pulses onto the selected scan electrodes and said data electrodes, to thereby display said assigned subframes for said selected display lines; (c) shifting by one or more than scan electrode(s) from each of said selected scan electrodes; and (d) repeating said shifting of step (c) and displaying of said assigned subframes until each of said divided subframes is displayed for all the

Abstract: There is a driving circuit disclosed for a field emission display which can reduce the power consumption and thus improve the reliability of high voltage elements by reducing the swing width of the driving voltage necessary for driving the gate, cathode and anode lines arranged to the field emission display.

Abstract: A color cathode ray tube having an improved electron gun, includes a quadrupole lens consisting of an independent static electrode having a static voltage applied thereto and a dynamic electrode which is disposed opposite to the independent electrode and having a dynamic voltage applied thereto. A dynamic strong quadrupole lens effect is obtained by applying a modulation voltage or parabola voltage to the dynamic electrode. When electron-beam-passing-apertures in electrodes of a main lens are enlarged, each axial distance between the axes of three electron-beam-passing-apertures of the static electrode opposite to the dynamic electrode in the strong quadrupole lens forming electrodes is offset and the sizes of the opposite side electron-beam-passing-apertures are increased by the offset axial distance.

Abstract: An improved resin layer used in the manufacture of cathode ray tube assemblies incorporates inorganic particles in the resin. The resin layer with particles is coated on a CRT screen prior to coating with aluminum film. The resin layer is volatilizable, so that following applying the aluminum film, the screen is baked to drive off the resin. The inorganic particles in the resin layer create an uneven boundary with the screen, so that during baking, volatilized resin in the form of gases can escape from between the aluminum and screen without forming bubbles or causing swelling.