Abstract: A microwave oven having a heater and a wall structure, includes a heater cover disposed between the heater and the wall structure and a plurality of protruding portions formed on the heater cover and on a depressed portion of the wall structure, respectively. The heater cover includes a bent portion formed at its peripheral edge, and a hanger, for hanging the heater, is fixed to the heater cover to prevent the heat transfer in every direction from the heater. In addition, the protruding portions are brought into contact with each other and are fixed by rivets. The microwave oven further includes an air conduit for guiding an air flow produced by a fan to a space between the wall structure and the heater cover.

Abstract: An elastic member for supporting the shadow mask of a color picture tube comprises a fixing portion having a welding point which is moved from the bottom end to the center or closer to the top end thereof, so that the fixing portion is fixed to the frame of the color picture at the welding point, a sliding portion and a connecting portion to be attached to the panel pin of a face panel through a connecting hole.

Abstract: The present invention relates to non-magnetic ceramic substrate material for magnetic head having similar thermal expansivity to the metal magnetic thin film, abrasion resistance during contact traveling of the magnetic tape and good processability and thus increasing lifetime by preventing exfoliation and crack of the magnetic thin film. The material comprises 10-35 mol % of CaO, 10-40 mol % of TiO.sub.2, 10-60 mol % of NiO and 10-50 mol % of CoO.

Abstract: A Galois field multiplication method for a set of a finite number of elements which enables four arithmetical operations including an addition, a deduction, a multiplication and a division, and a multiplier utilizing the multiplication method are disclosed. The Galois field multiplication method easily realizes various Galois field multipliers by ANDing respective items of a multiplicand with a corresponding one of the items of a multiplier factor in a stepwise manner, rotating left values resulted from the AND operation at the previous step, exclusively ORing the respective values resulted from the rotation with the respective corresponding values resulted from the AND operation at the current step, and operating on the highest polynomial term generated at the previous step in accordance with a generated polynomial.

Abstract: A jog device for magnetic recording and reproducing apparatus. The jog device temporarily rotates a clutch gear of the tape supply reel clutch during a mode conversion from a normal-direction reproducing mode into a reverse-direction reproducing mode. The jog device includes a clutch gear rotating unit, a rotating unit drive member, and a returning unit. The rotating unit includes a jog lever and a gear lever cooperating with the jog lever and selectively rotating the clutch gear. The drive member is a cam gear having a pinion gear gearing into and cooperating with a rack gear of a mode conversion function plate. The cam gear has a cam slot cooperating with a cam pin of the rotating unit. The returning unit includes a coiled torsion spring fitted over a shaft of the rotating unit and a pair of spring arm stoppers.

Abstract: The present invention relates to a method for fabricating an amorphous-silicon thin film transistor, which comprises the steps of forming a gate electrode having sloped edges on a substrate, depositing a silicon oxide film as a gate insulation film on the substrate on which the gate electrode is formed, performing a nitrogen plasma treatment process on the surface of the silicon oxide film to form a silicon nitride film at the surface of the gate insulation film and thus to form the gate insulation film completely, depositing an amorphous silicon film on the gate insulation film to form an active layer, depositing a n+ type amorphous silicon film over the entire exposed surface of the resulting structure to form an ohmic layer, etching the n+ type amorphous silicon film and the amorphous silicon film in this order to leave the n+ type amorphous silicon film and the amorphous silicon film only on a portion of the gate insulation layer, forming a source region and a drain region respectively only on portions of

Abstract: A method of displaying time of a VCR including steps for checking whether current time data is received, determining states of the received current time data corresponding to a duty cycle at times when the current time data is received and converting the determined logic states of the current time data to current time. The current time is then displayed, The current time is superimposed on a video signal and a resultant superimposed signal is displayed. The resultant superimposed signal is recorded when the user requires recording of the current time together with the video signal.

Abstract: A caption display controlling device and the method thereof for displaying, on a screen, captions for several scenes sequentially scrolled-up. The device includes a caption controller that decodes caption data extracted from an input composite video signal according to selection of a caption mode, a text mode or a scroll caption mode, and controls captions for several scenes to be sequentially scrolled up on the screen in the scroll text mode. According to the invention, words for previous scenes and words for the current scene are displayed scrolled up on the screen, so that the contents of the captions can be more easily understood and accordingly convenience and efficiency in watching a captioned video for language study can be improved.

Abstract: This invention relates to a sensor for detecting ultra-violet rays suitable for mass-production. The sensor for detecting ultra-violet rays includes one that is formed by junction of an upper layer with a lower layer so as to face each other across an air cavity, which lower layer includes a silicon substrate having a cavity, an insulation layer formed on all over the silicon substrate, a photoelectric pole part formed on the insulation layer and a protection layer formed on the photoelectric part, and which upper layer includes a glass substrate having a transmissive characteristic to ultra-violet rays, and an anode part formed on the glass substrate.

Abstract: A simple device for driving a minidisk player. This device carries out, using a common drive motor, both the disk loading/unloading operation and the pickup driving operation of the portable minidisk player. A power transmission gear is rotated by the rotational force of the common drive motor. The power transmission gear engages an idle gear which is moved by the turning motion of a link. This idle gear selectively engages either a disk loading gear or a pick up drive gear, thus to carry out the disk loading/unloading operation and the pickup driving operation. First and second locking units lock the idle gear to one of two predetermined positions so as to let the idle gear be rotated in opposed directions while engaging either the disk loading gear or the pickup drive gear. Each locking unit has a spring-biased turning member having a push projection.

Abstract: A method for mode changing of a deck mechanism suitable for use in a compact cassette tape recorder employs a single cam gear and a single electrically operated solenoid and does not cause overrunning of the tape out of the tape cassette in a mode changing operation. Mode changing is accomplished by moving a mode changing assembly along an outer cam and selectively engaging locking shoulders on the cam to change between a stop mode, play mode, reverse play mode, or reverse record mode.

Abstract: This invention relates to a method for controlling a ventilation motor of a microwave oven which is provided to control the ventilation motor automatically according to a setting time by a user.

Abstract: An audio message storing circuit and a control method thereof in a timer program of a video cassette recorder for recording an audio information simultaneously with the timer program and outputting the stored audio information when the present time is equal to a programmed time. The audio message storing circuit uses a key matrix, a timer, a communication processor, a microphone, a analog/digital converter, a random access memory, a gate and hold circuit, a digital/analog converter, a low band pass filter, an amplifier, and an audio recording circuit coupled to a record/playback head of the video cassette recorder. The method is carried out by the steps of storing the audio information in the random access memory, setting a timer program, and reading the stored information sequentially. The audio signal is outputted to the record/playback head of the recorder when the present time is equal to the programmed time.

Abstract: A method of and an apparatus for controlling seasoning of kimchi, capable of meeting maximally the user's taste, by deriving a seasoning condition by deduction about the load of kimchi to be seasoned, seasoning the kimchi according to the derived seasoning condition, and varying a seasoning time derived based on the user's taste in a small range, are disclosed.

Abstract: A method and an apparatus for controlling scale practice of an electronic musical instrument. The apparatus includes a function select switching section for selecting a desired one of various functions according to a user's selection. The function select switching section is provided with a scale practice switch, a scale select switch, a minor switch, an increment switch, a decrement switch, a random switch and a note hearing test switch. If the scale practice switch and the scale select switch are selected, sequentially varied scales are displayed on a display unit and one thereof is then selected by the user. The selected scale is displayed on the display unit. A minor or major of the selected scale is set if the minor switch is selected. Tunes with sequentially incremented or decremented notes and randomly varied notes are selected if the increment or decrement switch and the random switch are selected. The selected tunes are displayed on the display unit according to the selected scale.

Abstract: A method of automatically thawing a food in a microwave oven, is disclosed. The method of optimally thawing the food and preventing a phenomenon that the food is partially boiled. The method includes by primarily heating the food for a predetermined time where the food is large in amount, turning the primarily heated food and then additionally heating the turned food, while eliminating the step of turning the food where the food is small in amount.

Abstract: A high definition television signal conversion circuit using a side cut mode or a letter box mode.