Abstract: A two-way wireless personal video/audio communication system comprises a video mode switch for selecting a desired one of X, N, and R modes, and a video signal control circuit for transferring a video signal from a camera circuit to a display circuit in the N mode, a video signal from a remote terminal to the display circuit in the R mode and the video signal from the camera circuit to the display circuit and a video transmission/reception circuit in the X mode. The display circuit applies an output video signal from the video signal control circuit to a display to reproduce an image picked up by a camera. The camera circuit converts an image incident on a camera lens into an electrical video signal and outputs the electrical video signal to the video signal control circuit.

Abstract: The present invention discloses a field emission display including: a monitoring emitter applied to a constant voltage wherein the monitoring emitter is installed at an outer portion of an active area of a cathode plate; and a current measuring electrode applied to a constant voltage to measure the current flowing to the monitoring emitter wherein the current measuring electrode is disposed at an outer portion of an active area of an anode plate. In addition, a method for measuring a vacuum degree of a field emission display, includes the steps of: measuring current variations of a monitoring emitter by electron emission of a display emitter, when the vacuum degree is changed by gas molecules outgassed from a panel of the FED; and monitoring variations of the vacuum degree in the panel of the FED according to the variations of the measured anode current.

Abstract: This invention provides a method for managing navigation data for a rewritable recording medium, which are referred to for control of recording, editing, and reproduction. This method enables access to each information table in the navigation data directly by referring to the start address, which is kept in the first information table in the navigation data. Management data, which are relevant to the data to be recorded to the rewritable recording medium and are created and written to the relevant information tables, are accessed directly based on the start addresses. When data on the recording medium are reproduced, the information tables which contain management data required for reproduction of the requested data are located directly by the start addresses. Subsequently, the data are read out from the rewritable recording medium and reproduced in reference to the management data.

Abstract: Disclosed is a portable multimedia player comprising: a portable phone section having a modem adapted to communicate with an external device; a multimedia control section adapted to perform a control of the overall operation of the portable multimedia player and including a CPU, a control logic circuit, a memory having a predetermined storage capacity and adapted to store a music file and a moving picture file downloaded by way of online communications, and a system ROM adapted to store predetermined control program; a CD player section adapted to drive a CD-ROM driver to reproduce a CD media; a key input section having a plurality of function keys and adapted to input a control signal for controlling each of the elements of the portable multimedia player; a MPEG data processing section adapted to process a MPEG-1 video signal and a MP3 audio signal from a file stored in the CD player section or the multimedia control section and to convert the MP3 audio digital signal into an analog signal to output the conv

Abstract: The present invention discloses a method of forming a p-n junction on a ZnO thin film and a p-n junction thin film. The object of the present invention is to provide a method of forming a p-n junction on a ZnO thin film and a p-n junction thin film which deposits Zn3P2 on a ZnO thin film and forms a p-type material constituting a device by using thermal diffusion for the Zn3P2 in order to fabricate an effective p-type material. The method of forming a p-n junction on a ZnO thin film, in a light emitting device having a sapphire substrate as a base substrate, comprises the steps of: cladding the sapphire substrate with a n-type ZnO thin film; depositing a Zn3P2 thin film on the n-type ZnO thin film; forming a p-type ZnO thin film by irradiating a laser on the upper surface of the Zn3P2 thin film, decomposing the Zn3P2 thin film and diffusing the same on the n-type ZnO thin film; and forming an electrode on the n-type ZnO thin film and the p-type ZnO thin film respectively.

Abstract: A contamination preventing device of an optical head for near field recording includes a slider being supported by a suspension in a deck and having a collective hole vertically penetrated though which a light source is transmitted; a collective lens being installed at a lower portion of the collective hole of the slider, collecting light generated from the light source and forming a spot at an upper surface of a recording medium; and a lens contaminant removing means removing a foreign substance clung to the collective lens. When the surface of the collective lens mounted at the slider is exposed to contaminant substances while performing interaction with the surface of the recording medium in the near field optical recording or reproducing, the lens surface can be easily cleansed to remove the contaminant of the surface of the lens immediately.

Abstract: The present invention relates to a plasma display panel, and more particularly, to a method for operating a plasma display panel (PDP), in which a pulse applied to an electrode in the PDP is controlled according to a gray scale of a picture to be displayed. The method for operating a PDP having three electrodes, the PDP for displaying one frame which includes a plurality of sub-fields each having a reset period, an addressing period, and a sustain period in view of time, the method including the steps of applying a fixed number of pulses in a fixed frequency in each period for displaying an image of a particular grey scale, and adjusting a number of pulses and/or a frequency applied in each period for displaying an image having a grey scale different from the particular grey scale.

Abstract: A method for producing nano-sized titanium dioxide (TiO2) ultrafine powder from titanium tetrachloride (TiCl4) in the vapor phase by the gas phase oxidation reaction using flames, in which the method comprises: simultaneously introducing titanium tetrachloride (TiCl4), vapor, argon, oxygen, hydrogen and air into a five-piped flame reactor to form a flame having a temperature of greater than 1,000° C.; and producing nano-sized titanium dioxide ultrafine powder having an average particle size of less than 50 nm.

Abstract: The present invention, which relates to a roller type hyperthermo-radiative apparatus, is designed to minimize friction resistance upon horizontal movement thereof. The roller type hyperthermo-radiative apparatus includes a backing plate with wheels fixedly supported at four corners thereof. A plurality of pairs of supporting mechanisms is mounted on the backing plate. Roller type rotating members are rotatably installed between respective pairs of the supporting mechanism and include cylindrical empty spaces formed therein. Heating members are inserted into the empty spaces of the rotating members from both ends of the spaces. Bearing members fixedly support the heating members to the supporting means and rotatably couple the rotating members thereto. Socket portions are connected to the heating members for supplying external electric power. The roller type hyperthermo-radiative apparatus is preferably mounted on a mat for hot compress and acupressure.

Abstract: Disclosed is an access floor made using a special transfer paper which is laid on a floor of the interior of a clean room to prevent generation of dusts or bacteria in a factory of and integrated circuit such as a semiconductor, a laboratory for optics, genetic engineering and space engineering, a clinic room and so on, in which a conductive paint is coated on an upper surface of a plate and a special transfer paper with various patterns and colors are deposited and integrated on the conductive paint.

Abstract: The present invention, which relates to a mat for hot compress and acupressure equipped with a roller type hyperthermo-radiative apparatus, is designed to minimize friction resistance upon horizontal movement thereof. The mat includes a mat member foldable at one side thereof and with a longitudinal groove formed in the center thereof. Curved rails are formed at both sides of the central groove on the bottom of the mat member, which has curved portions corresponding to the curvature of the vertebral region of a user. Also, a roller type hyperthermo-radiative apparatus that travels along the curved rails and a conveying mechanism for moving the roller type hyperthermo-radiative apparatus in a horizontal direction are included. Finally, there is a control panel for controlling the conveying mechanism and an operating unit for adjusting a position of the roller type hyperthermo-radiative apparatus.

Abstract: A reciprocating type driving mechanism for use for a bicycle, baby carriage and wheel chair, which can provide convenience in driving to the user and which comprises: a front and rear wheels W1 and W2; a gear box B; a driving and driven gears 20 and 30 and a side gear 31 formed integrally with the driven gear 30; driving members 40 each comprising three links 41, 42 and 43; a pinion 50 adapted for alternate operation of the driving members 40; a head gear 60 in meshed connection with the side gear 31; an intermediate gear 70 positioned below the head gear 60; a relaying gear 81 in meshed connection with the intermediate gear 70; an output gear 82 provided at the bottom part of the driving axle 80 for transmitting the torque; and a hub gear 90 in meshed connection with the output gear 82 (FIG. 1).

Abstract: An illuminating toy figure for use with a conductive surface and an energy source is disclosed. The toy figure includes a structure having means for securing a battery and a first and second terminal, a light source having a third and fourth terminals, a first and second appendages, and a circuit. The circuit provides for an arrangement where the first, second, third and fourth terminals are connected to a first and second conductive plates located in the first and second appendages, respectively, such that when the first and second conductive plates are in electrical contact via the conductive surface, the light source is illuminated. The toy figure further includes magnetic properties in order to adhere to metal surfaces and a plastic structure embodying humanoid qualities.

Abstract: An optical pick-up actuator includes a lens holder suspended in a magnetic field by a suspension wire and having tracking and focusing coils and objective lens, a magnet for generating a magnetic field crossing other magnetic field generated by a electric current along tracking and focusing coils so as to drive the objective lens in focusing and tracking directions in suspended state, a frame for supporting the lens holder by the suspension wire, a yoke for securing the frame by a shaft, pairs of tilting coils mounted at both end portion of the frame for driving the lens holder in suspended state by suspension wires by rotating the frame in a predetermined direction on the axis of the shaft, and pairs of tilting magnets arranged so as to correspondingly face the tilting coils.

Abstract: The present invention relates to a highly efficient searching system using a combination of X ray signal and millimeter wave signal, which allows a practical and effective method for searching human beings in public places where a level of security is required. Millimeter wave and X ray signal emitters and detectors are used to provide a processed image of a detected object, which is then analyzed and compared with objects in a stored database. Flagged objects then signal an alarm to alert security personnel.

Abstract: The invention relates to the technology of applying a coating of powder materials by spraying and can be used for producing a coating of metals; their mechanical mixtures and dielectrics, adding various functional properties to treated surfaces. The proposed method of applying a powder coating comprised as follows: producing a gas-carrier flow, mixing powder with it, accelerating the gas-powder flow in the nozzle, generating its preset profile, further simultaneously generating the second gas-carrier flow, heating it, generating its preset profile and accelerating it in the nozzle, after that superimposing the accelerated gas-powder flow of the preset profile over the gas-carrier flow of the preset profile, and directing the cumulative jet to an article.

Abstract: Disclosed is a method of tracking control for an optical disc recorder and reproducer, which includes the steps of detecting a land/groove switching position, storing tracking error signals for a predetermined time if the land/groove switching position is detected, obtaining a mean value of the stored tracking error signals, and judging whether the mean value is larger than a predetermined permissible tracking level, and if it is judged that the mean value is larger than the predetermined tracking level, determining a direction of a track center, correcting the track center, and compensating for a DC offset.

Abstract: In a glitch free clock multiplexer circuit and a method thereof, the glitch free clock multiplexer circuit includes a delay unit for receiving asynchronous clock signals (Clock A, Clock B) and an external selection signal (Sel) and outputting a delay signal by delaying a clock signal selected by the external selection signal (Sel) for a certain clock cycle, a state region transition generating unit for comparing the delay signal with a count value provided from a user, outputting a first control signal (Sel_clock) according to a comparison value and a second control signal (enable) for controlling the first control signal in a logic low state, and a glitch removal unit for outputting a clock output signal (Clock_out) by performing an AND operation of a temporary clock signal (Temp_clock) selected by the first control signal and a third control signal generated by delaying the second control signal (enable) for a certain clock cycle.