Abstract: A digest variable speed reproducing apparatus for a video cassette recorder (VCR) including a system controller for supplying a desired variable speed data; a control signal detector for detecting a control signal written onto a VCR tape together with an audio signal during digest variable speed reproduction, from the VCR tape; a variable speed controller for supplying A/D conversion execution signal and D/A conversion execution signal and for supplying write control signal or read control signal only when a control pulse is detected by the control signal detector, in response to the variable data from the system controller; an A/D converter for converting a reproduced analog audio signal into a digital signal with a sampling rate corresponding to the variable speed data in response to the A/D conversion execution signal; a D/A converter for reconverting the digital signal read from a memory into an analog audio signal in response to the D/A conversion execution signal; and a memory for writing variable speed

Abstract: Electron guns for color picture tube capable of strengthening the refracting action of electrostatic prisms and of overcoming possible distortion of three electron beams at about the periphery of a screen due to strong nonuniform magnetic field are disclosed. The electron guns has variable asymmetric electrostatic lenses, which lenses include first and second focusing electrodes, a first electrostatic deflection electrode mounted to the first focusing electrode, a second electrostatic deflection electrode mounted to the second focusing electrode, and an accelerating electrode placed in front of the second focusing electrode. In another embodiment, the variable asymmetric electrostatic lenses of the electron guns includes electrostatic deflection means placed between the first and second focusing electrodes.

Abstract: A rotary head drum of a magnetic recording/playback apparatus having a back yoke integrated with a ring collar. The head drum includes a rotatable shaft, an upper rotary drum and a lower stationary drum which are mounted on upper and lower parts of the rotatable shaft, respectively. The back yoke integrated with the ring collar is mounted about the rotatable shaft under the lower stationary drum. The ring collar maintains a predetermined gap between a motor stator and a motor rotor. The motor stator is mounted about the rotatable shaft under the back yoke and the motor rotor is mounted on a lower surface of the ring collar. The motor housing is mounted on a lower surface of the lower stationary drum and made of a plastic material for absorbing a vibration.

Abstract: A Video Tape Recorder (VTR) with a liquid crystal display (LCD) projector free from a radiating blower is disclosed. The VTR with LCD projector includes a plurality of fins positioned on a top surface of a rotary head drum for generating air currents during rotation of a rotary head drum of a VTR part. A polarizing plate of the LCD projector part is cooled by the air currents generated by the fins. The VTR with LCD projector achieves compactness and reduction of cost, in keeping with the recent market trend.

Abstract: A device for simply and precisely fixing a deflection yoke to a Braun tube in such a manner that it does not permanently affix the yoke to the Braun tube but permits the location and fixing angle of the yoke with respect to the Braun tube be easily changed as required. The device includes a holder, coupled to a separator, and a plurality of wedge type cams rotatably mounted on the holder. The holder is provided with a plurality of mounts for rotatably supporting the wedge type cams respectively, a plurality of releasable fixing members for fixing the cams at their adjusted angles, and connection bands extending between the mounts for connecting the mounts together. The wedge type cams not only adjust the yoke fixing angle for compensation of mis-alignment of electron gun but also releasably affix the deflection yoke to the Braun tube. In another embodiment, the wedge type cams may be substituted by pulley type cams which are rotatably mounted on the holder.

Abstract: This invention relates to automatic tracking devices of digital VCRs which is provided to have a capability of precise control of the tracking by detecting rate of error due to variation of tracking of a rotating head.

Abstract: A serial transfer system for performing serial data transfer between transmission and reception stages which have phase locked loops for generating reference clock signals. The serial transfer system has a transmission circuit and a reception circuit. The a transmission circuit converts parallel data from the transmission stage into a serial data signal at the same time that it appends a data marker to the parallel data in response to the reference clock signals from the phase locked loop of the transmission stage and transmits the converted serial data signal through a coaxial cable. The reception circuit receives the serial data signal from the transmission circuit through the coaxial cable, converts the received serial data signal into the original parallel data using its appended data marker and the reference clock from the phase locked loop of the reception stage and outputs the converted parallel data to the reception stage.

Abstract: This invention relates to a magnetic card for use in public telephones or public traffic such as subway, which includes a blank card, a magnetic layer formed on the blank card for recording variable information indicating amount of available money left according to amount used of the card, and an optical recording layer formed on the magnetic layer for recording invariable information marking card price. It is possible to prevent the magnetic cards from deterioration of the record like erasure of record of money due to mis-handling in everyday life and has the advantage of high response speed because of utilization of light.

Abstract: The thin film transistor LCD includes, a plurality of gate lines each having a projection part formed spaced in a certain interval on a transparent substrate; a plurality of first data lines each formed covering one side of each of the projection parts of the gate lines for serving as drain electrodes; a plurality of second data lines each formed on the transparent substrate to cross the gate lines at a right angle to the gate lines in parts other than the projection parts but formed discrete so as to be intermittent to each other at parts crossing the gate lines; an insulation layer having at least one contact hole on each of the intermitted pieces of the second data lines formed on all over the surfaces of the first and the second data lines, the gate lines and the transparent substrate; and, a plurality of third data lines formed on the insulation layer to cover the other side of the projection parts and to connect the intermitted pieces of the second data lines through making contact with the contact hole

Abstract: An active matrix for liquid crystal displays having a plurality of picture elements, a plurality of address buses, and a plurality of data buses orthogonal to the address buses. Each address bus includes a pair of address subbuses spaced from one another, and each data bus includes a pair of data subbuses spaced from one another. Each picture element includes a pair of display electrodes, and each data subbus is separated from the other by at least one display electrode. Each picture element of an active matrix liquid crystal display includes a pair of display electrodes wherein the position of the pair of display electrodes representing a color on one row of the picture elements is laterally shifted by at least one display electrode with respect to the position of the pair of display electrodes representing a different color on an adjacent row to form a triangular structure representing the color picture element between the adjacent rows.

Abstract: A two-picture video recording/reproducing apparatus and method automatically edits & records a video signal from an 8 mm video recorder/reproducer onto a VHS video recorder/reproducer, monitors the recording state on a sub-picture, and records an externally input signal by the video recorder/reproducer to monitor it on the sub-picture while watching a TV broadcast signal on a main picture.

Abstract: This invention relates to an inline electron gun for a color cathode ray tube, more particularly to an inline electron gun which can provide high resolution by controlling intensity of electrostatic lenses that controls electron beams according to intensity of current, dynamically.

Abstract: A method and an apparatus for interpolating a scanning line of a TV signal in a TV, wherein a diagonal component of a video signal of the TV signal is considered and there can be prevented a line structure, a line flicker and a vertical resolution insufficiency due to shortage in the number of the scanning lines.

Abstract: A Braun tube for a projection television receiver in which homogeneity of luminance in the peripheral portion of a screen is obtained by setting the screen width-to-length ratio to 16:9 with the curvature radius of the long side is less than that of the short side when the fluorescent surface is viewed from the outer circumference of a panel so that the main axis of the light incident to the peripheral portion of the screen is refracted more toward the center portion of the screen than the other portion thereof.

Abstract: An apparatus and a method for recording/playing back a broadcasting signal wherein the broadcasting signal is separated into a video signal and an audio signal and then written into video and audio signal memories. The video and audio signals are read from the video and audio signal memories if a HISTORY mode key is ON. The operation is ended if a REVIEW key is OFF under the condition that the HISTORY mode key is off. If the REVIEW key is ON the write operation of the video signal into the video signal memory is stopped and it is discriminated whether a JOG key is ON or OFF. A video signalportion of a predetermined previous interval is read from the video signal memory if it is discriminated that the JOG key is OFF. If the JOG key is ON, a read timing signal is generated to read the video signal from the video signal memory according to an operation of the JOG key.

Abstract: This invention relates to a device for correcting DC of a HDTV, which can correct DC(Direct Current) that is liable to cause in mixers, base band amplifiers and ADC(Analog/Digital Converter) for a HDTV receiver. The device includes a non-interference DC detector for detecting DC from digital signals of an I channel and a Q channel applied under non-interference conditions in which an IF signal input has been cut off. An interference DC detector for detecting DC from the digital signals of an I channel and a Q channel applied at every field according to data field synchronization signal applied from outside. A selection part for selecting either one of the DC values received from the non-interference DC detector and the interference DC dectector. And, a D/A conversion part for D/A conversion of the DC value received from the selection part. Whereby, the DC value varying with time can be corrected by using field synchronization data and without turning the switch of IF terminal off.

Abstract: A shelf device for a refrigerator comprising a bracket or a guide rail horizontally mounted on a back wall of a refrigerating chamber, and a shelf assembly coupled to the bracket or the guide rail so that a user can horizontally displace or slide the assembly to a desired position depending upon a size of an object to be stored.

Abstract: An apparatus and a method are provided for rapidly determining, without iteration, a desired value of a time interval between a head switching signal and the next capstan motor stop signal for a slow speed reproduction mode which intermittently stops a capstan motor of a video cassette recorder during a slow speed reproduction mode of a video cassette recorder. The invention allows stop points during a slow speed reproduction mode to be made independent of capstan load.

Abstract: A tuning data sharing apparatus and method for a television/video cassette tape recorder, includes a first tuner for tuning a broadcasting signal, a first memory for storing a plurality of tuning data, a first microcomputer for transferring the plurality of tuning data stored in the first memory, when a command to store same tuning data is input thereto, a second microcomputer for receiving the plurality of tuning data transferred from the first memory, a second memory for storing the plurality of tuning data transferred from the first memory under a control of the second microprocessor so as to store the same plurality of tuning data in the first and second memories prior to a channel selection, and a second turner for tuning a broadcasting signal using the plurality of tuning data stored in the second memory.