Abstract: This invention relates to a microwave oven which can generate and transfer maximum microwave power to food being cooked irrespective of the weight and size of that food being cooked, thereby shortening cooking time and improving the efficiency of cooking. The microwave oven includes a sensor for sensing the food load on a turntable in a heating chamber, a microcomputer for controlling the oven in response to key signals input by the user and in response to the load sensor, a power supply for supplying power to a magnetron to operate the magnetron under the control of the microcomputer, an impedance matching device for matching impedance by moving a reflector in a waveguide fixed to the heating chamber, a match driver for controlling the impedance matching device under the control of the microcomputer, a variable vane mounted in an opening of the heating chamber, and a variable vane driving means for rotating the variable vane under the control of the microcomputer.

Abstract: A method of reproducing a video signal in a digital video cassette recorder, comprising the step of performing intra-frame coding at an interval of a predetermined number of frames of the video signal to compress the video signal and recording the compressed video signal on a video tape, and the step of varying a travelling speed of the video tape according to a desired one of normal, still, fast forward, fast reverse, slow forward and slow reverse playback modes to reproduce the video signal recorded on the video tape in the desired playback mode. The travelling speed of the video tape is varied by combining speeds of the normal, still, fast forward jump and fast reverse jump modes according to the desired playback mode. The intra-frame coding is performed at an interval of L frames, where L is a natural number greater than or equal to 2, and first slice data of the coded Lth frame becomes first video data of a transmitted data field.

Abstract: A circuit and a method for generating a caption signal in a video signal processing system such as a video cassette recorder or a camcorder availably connected to a caption television. The circuit comprises a caption data storage unit for storing caption data into which a message to be displayed as a caption on a screen is coded, a caption microcomputer for reading the caption data from the caption data storage unit and generating a plurality of control signals, a caption code encoder for encoding the read caption data from the caption microcomputer into the caption signal under the control of the caption microcomputer and generating a caption region signal designating a region of a video signal into which the caption signal is to be combined, and a mixing unit for combining the caption signal from the caption code encoder into the video signal when the caption region signal from the caption code encoder is high.

Abstract: This invention relates to a chargeable fan heater capable of operation without external power supply, having a burner for burning fuel to produce hot combustion gas, a sterling engine having a shaft and for producing shaft works by the thermal energy from the hot combustion gas, a fan for discharging the hot combustion gas to spaces to be heated, a combined motor-generator connected to the sterling engine and for supplying shaft works to the shaft in starting of the fan heater and generating electricity by the shaft works of the sterling engine during normal operation of the fan heater after starting, a battery for supplying power to the combined motor-generator and being charged by the electricity generated in the combined motor-generator, and a control box for controlling the supply of power to the electric parts of the fan heater necessary for operation of the fan heater, burning of the burner and, the combined motor-generator to act as a motor in starting and as a generator after starting, of the fan heat

Abstract: A device for converting image signal frame format including a motion compensator for restoring image signals by carrying out motion compensations employing motion information, variable length decoding, inverse multiplex conversion, displaced frame difference, inverse quantization, and inverse discrete cosine conversion. A first frame ratio convertor is used for classifying areas by pixels and converting frame ratios of image signals received from the motion compensator according to the classified areas. The device provides users with the advantage of natural display pictures having good picture quality by carrying out classification of the corresponding pixel areas and subsequent interpolation utilizing various informations applied from an image signal decoder.

Abstract: An improved white-balance adjusting apparatus and a method thereof for a video camera capable of automatically varying a white-balance trace region in accordance with a change in color temperatures of a light source and of performing an automatic white-balance adjusting operation.

Abstract: A color electroluminescence(EL) display element and the manufacturing method thereof which can improve an RC-time delay phenomenon and the contrast of the EL display element. According to the EL display element, an auxiliary metal electrode is formed on a transparent electrode. The auxiliary metal electrode is formed by forming on the transparent electrode a metal film having a high melting point and a low resistivity, such as molybdenenum, with a thickness of about 1000 .ANG., and then by selectively etching the metal film so that it remains on the boundary between each of R, G, and B color filters with a width of about 5 to 30 .mu.m. The color filters are formed on a circular polarizing plate and sealed up with the auxiliary metal electrode, and thus the circular polarizing plate absorbs an external light incident to and reflected from a metal electrode.

Abstract: An apparatus for locating a remote control transmitter which controls an electronic or electric device, such as a TV, VCR, or air conditioner. The apparatus includes two detecting units disposed at different angles, and the different infrared signal strengths received according to directivity of the location detecting units is transformed into a time value from which the accurate location of the remote control transmitter can be obtained. The apparatus is simple and the detecting operation of the remote control transmitter is reliable and precise.

Abstract: A low frequency vibration type washing machine having at least one horizontally reciprocating disk is disclosed. The disk is provided on the side wall of the washing tub and horizontally vibrates in a direction perpendicular to the direction of gravity of the multi-phase washing medium, thus to generate the resonance phenomena in the washing medium inside the washing tub while saving disk drive energy. The multi-phase washing medium is made of water, detergent and air. The washing machine also includes an actuator which is coupled to the disk for driving this disk. In an embodiment, two disks are provided on the side wall of the washing tub in such a manner that they face each other. In this case, the disks may vibrate so as to form vibrational waves of the same phase or of different phases. The vibrational waves of the disks may have a phase difference larger than -.pi./2 and less than .pi./2.

Abstract: A control apparatus and method for a microwave oven capable of fixing an optimum thawing time, coping with unexpected voltage variation of an input AC source. According to the aforesaid apparatus and method, a weight factor corresponding to an input source voltage variation is found, a thawing time proportional to weight of a food item to be thawed is determined, and as a result a final optimum thawing time is determined by multiplying the weight factor and the thawing time together.

Abstract: A chaos processor which is able to gain a dynamic of a dynamics system and to determine whether the dynamic is gained by a random noise or by the meaningful information.

Abstract: An apparatus for recording and reproducing digital/analog video signals including a single head drum attached with heads for processing analog video signals and heads for processing digital video signals, and switches performing switching operations on the basis of the kind of input video signals. The head drum is variable in speed, depending on the kind of input video signals. In accordance with the apparatus, both analog and digital signals can be recorded and reproduced by a single recording unit and a single reproducing unit both capable of varying in characteristic, based on a video signal received thereto. This provides a reduction in manufacture cost and a light, thin, simple and compact construction of the existing VCRs.

Abstract: An electron gun for a color cathode-ray tube for providing a passage for a plurality of electron beams, each beam representing a color component for forming a color image. The electron gun of the present invention includes a pair of electrodes substantially symmetrical to one another with respect to the horizontal direction and coaxial with the tube in the axial direction. Each electrode has a common opening. Each common opening faces the other and is spaced from the other at a given distance in the axial direction. According to an embodiment of the present invention, each electrode includes first and second electrode member. The first electrode member inside the electrode is spaced at a given distance from the common opening of the electrode in the axial direction. The first electrode member includes a plurality of openings in cascade in the horizontal direction, and these openings partially overlap one another and communicate to one another collectively to form a singly aperture.

Abstract: This invention relates to a circuit for solving a vertical interlace phenomenon generated by the instability of servo control when a mode of VCR operation is fast or still, comprising a vertical pulse delay 101 for delaying a vertical pulse inputted from a vertical and horizontal oscillator 100 for the time of a certain horizontal lines, a vertical driving part which transforms the vertical pulse delayed from the vertical pulse delay 101 into a vertical a tooth wave pulse, and amends the transformed vertical a tooth wave pulse according to the vertical position signal inputted to be made relayed as a feedback, a vertical deflection amplifying part for amplifying the amended a tooth wave pulse inputted from the vertical driving part 102, a vertical position detecting part 105 for detecting a vertical position of a picture from the signal inputted from the vertical deflection amplifying part 103 through a vertical deflection coil 104, a Micom 106 for controlling an operation of the vertical pulse delay 101 and

Abstract: Optical pick-up system and method for accurately reading information recorded on an optical disc. The invention makes it possible to determine the kind of an error occurring upon reading information recorded on an optical disc by light beams from a light source, by using error detectors, and to correct accurately the error by driving a focusing lens, thereby capable of rapidly correcting errors such as tracking/focusing errors, providing a light and compact construction and improving a reliance, so as to solve problems of a high sensitivity to variations, a poor assembling ability, a bulky construction and a degraded reliance, encountered in optical devices which have been generally used for reading information recorded on optical discs.