Abstract: The present invention provides with a black matrix, a phosphor screen, and a method of manufacturing thereof. For a method of manufacturing the black matrix formed on the inner surface of a panel of a color CRT, a photoresist is not used, but a wet electrophotographic method was employed, using graphite for a main component of the black matrix materials, and forming a phosphor screen by a dry electrophotographic method to improve the quality of a color cathode-ray-tube.

Abstract: A swiveling device that can be used in a stand supporting LCD monitors is disclosed. The swiveling device uses combinations of flanges and ribs to prevent the concentration of eccentric load forces on central connectors. This increases the reliability and the corresponding market competitiveness of monitors using this swiveling device as well as preventing the inefficiencies created by monitor failure in the work place.

Abstract: A refrigerator has an evaporator to discharge cold air into a food storage chamber by rotation of a fan as the cold air is generated during circulation of a coolant, and a temperature detecting unit to detect the temperature of the evaporator and generate a signal related to the evaporator temperature. The fan is controlled to initially rotate at a low speed (when the evaporator is warmest) and then at a progressively increasing speed. The increasing speed is independent of the temperature of the food storage chamber. The speed could be increased in response to detected decreases in the evaporator temperature. Alternatively, the speed could increase automatically for a predetermined time period.

Abstract: A phase locked loop for synchronizing decoding clocks with encoding clocks in a Moving Picture Experts Group (MPEG) system. The phase-locked loop circuit includes a voltage controlled oscillator for converting a decoding clock into an encoding clock, a register unit for storing multiplexing program clock reference signals, each input with a desired number of bits, a counter being initialized by a first program clock reference signal output from the register unit, thereby generating a local program clock reference signal, and a phase error control unit for combinationally operating the program clock reference signal stored in the register unit and the local program clock reference signal, thereby generating a phase error signal for controlling the voltage controlled oscillator.

Abstract: An optical pickup adopting a multi-coated polarization holographic optical element (HOE).

Abstract: A pre-focus electrode system in an electron gun for a color cathode ray tubes disclosed, the color cathode ray tube including, in successive arrangement, a three electrode part having a plurality of cathodes each for emitting electron beams, a control electrode for controlling emission of the electron beams, an accelerating electrode for accelerating the electron beams, at least two pre-focus electrodes for pre-focusing the electron beams, and a focusing electrode and an anode for forming a main lens for focusing the electron beams on a screen. The focusing electrode has two electrodes provided by dividing the focusing electrode into two to form a first dynamic four polar lens part with one of the two electrode applied of a static voltage and the other electrode applied of a dynamic voltage synchronous to a deflection current.

Abstract: A lens device which can be used as an objective lens in an optical pickup apparatus includes an objective lens provided along a light path facing a disc and having a predetermined effective diameter, and light controlling means provided along the light path for controlling the light in an intermediate region between near and far axes of an incident light beam, thus providing a simplified and inexpensive device for using discs of differing thickness in a single disc drive, by reducing the spherical aberration effect.

Abstract: An improved CMOS current source circuit capable of constantly generating a certain reference voltage irrespective of an analog supplying voltage, a substrate temperature, and a temperature variation, which includes a start unit for driving the CMOS current source circuit in accordance with a start signal; a bias current generating unit driven by the start unit for generating a bias current in accordance with an analog voltage, a substrate voltage, and a temperature variation; a current input unit for inputting a bias current; and a current compensation unit for receiving a bias current through the current input unit and for compensating the bias current in accordance with an analog voltage, a substrate voltage, and a temperature variation and for generating a reference current.

Abstract: The present invention relates to a metal silicon field effect transistor (MOSFET), and more particularly to a MOSFET, using a Si or SiGe channel to effectively adjust threshold voltage. The transistor according to the present invention can solve the problems, such as the punch-through caused by the short distance between the source region and the drain region, the decrease of the breakdown voltage between the source region and the drain region and the leakage current flowing into the bulk region beneath the channel due to the drain-induced barrier lowering. Furthermore, because the source region and the drain region are isolated from the semiconductor substrate by the lower insulation layer, the removal of the parasite junction capacitor speed up the transistor.

Abstract: A method of developing a screen of a cathode ray tube includes the steps of establishing an uniform electrostatic charge on selected areas of an inner surface of a panel with a predetermined pattern, rotating a nozzle to a predetermined angle with respect to the inner surface of a panel, and moving the rotated nozzle backwards and forwards while spraying a dry-powdered and electrically charged screen structure material on the selected areas of the inner surface of the panel.

Abstract: The invention relates to a method for manufacturing a super self-aligned heterojunction bipolar transistor which is capable of miniaturizing an element, simplifying the process step thereof by employing a selective collector epitaxial growth process without using a trench for isolating between elements. According to the invention, isolation between elements is derived by using a mask defining an emitter region and a second spacer. The base layer has multi-layer structure being made of a Si, an undoped SiGe, a SiGe doped a p-type impurity in-situ and Si. Also, the selective epitaxial growth for a base is not required. Thus, it can be less prone to a flow of leakage current or an emitter-base-collector short effect.

Abstract: A flat-panel display apparatus including a variable flat-panel display unit for multi-directional display of images in accordance with a supplied video signal; a stand unit for supporting the variable flat-panel display unit; and a balancing element of a predetermined mass in the stand unit, for maintaining stability in the apparatus. The balancing element is mounted to the bottom cover of the stand unit and is made of a metal having a high density.

Abstract: An optical pickup capable of compatibly adopting disks of different formats which are placed in an optical player includes a first optical source for emitting light having a predetermined wavelength, a second optical source for emitting light having a wavelength different from that of light emitted from the first optical source, an objective lens for focusing light emitted from the respective first and second optical sources on a recording medium placed in the optical player, a light path changing unit disposed on a light path between the first and second optical sources and the objective lens for changing the traveling path of incident light, a first optical detector for receiving light emitted from the first optical source and is incident via the recording medium and the light path changing unit, and a second optical detector for receiving light emitted from the second optical source and is incident via the recording medium and the light path changing unit.

Abstract: A symmetrical proof-mass accelerometer with a self-diagnosis capability and its fabrication method are disclosed. The accelerometer has symmetrical mass distribution with respect to the plane of the cantilever beam with an offset between upper and lower masses, so as to minimize cross-axis sensitivity and facilitate self-diagnostic resistor installation. This accelerometer can be applied to automobile electronics systems, consumer electronics, and industrial electrical measurement systems, in which the measurements of displacement, velocity, vibration, acceleration, angular acceleration and their changes are required.

Abstract: This invention relates to a stabilized isothiazolone solution and more particularly, to a stabilized isothiazolone solution comprising isothiazolone expressed by the following formula (I), stabilizer expressed by the following formula (II), and organic solvent diffusing these compounds effectively: ##STR1## In these formulae, n, R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 have the same definitions as defined in the detailed description of this application, respectively.

Abstract: A segment-based contour encoding method is provided. A motion compensation of an object in a current image with respect to a reference image is performed to obtain a motion-compensated image. The contour contained in the image motion-compensated is compared with a contour of an object in a current image, to divide the whole contour of the object in the current image into a global motion compensated (GMC) segments and a global motion compensation failure (GMF) segments. Each GMF segments is divided into a local motion compensated (LMC) segment and a local motion compensation failure (LMF) segment. The GMC segments and the LMC segments are motion-compensation-encoding and the LMF segments are encoded using only pixel information constituting each LMF segment. The contour encoding method can reduce the number of the LMF segments and can perform an efficient encoding operation for motion compensation encoding.

Abstract: An optical pickup device which is capable of reproducing and recording information from at least two discs having different thicknesses includes a light source, an objective lens provided along the light path from the light source facing the plane of a disc and having a predetermined effective diameter, a beam splitter provided between the objective lens and the light source, a photodetector for detecting the beam split from the light splitter and reflected from the disc, and light controller provided along the light path facing the photodetector lens for controlling the light of the intermediate region between near- and far axis regions of an incident light beam. The optical pickup device is simplified and the manufacturing cost therefor is low. Also, by reducing the spherical aberration effect for the light, discs having different thicknesses can be used in a single disc drive.

Abstract: There is disclosed a method of manufacturing a silicon/silicon germanium heterojunction bipolar transistor having a good conformity and an improved speed characteristic, which includes the steps of sequentially laminating an underlying nitride film, an oxide film, a polycrystalline silicon film and an upper nitride on a semiconductor substrate on which devices are separated and a collector is formed; sequentially etching said upper nitride film and said polycrystalline silicon film using the emitter as a mask, and then forming a side wall nitride film; selectively wet-etching said oxide film to form a side base linker opening; burying said base linker opening with a polycrystalline silicon; oxidizing said polycrystalline silicon film buried into said base linker opening and then removing said oxide film by means of the selective wet-etch process; removing said upper nitride and then forming a silicon/silicon germanium film as a base film on the exposed thereof; and forming an emitter said silicon/silicon germ

Abstract: A mold for encapsulating semiconductor device packages provides improved reliability by reducing air traps in the encapsulant. The mold has an upper mold die and a lower mold die which together form a cavity where the package is encapsulated by the molding compound. Air traps are reduced by equipping the lower mold die with projections formed along edges of the cavity extending in the direction of the molding compound flow. The mold allows a reduction of the formation air traps around or at the positions where the lead frame and chip are located so that the reliability of the resulting package is improved.

Abstract: A biaxially extended polyester film which comprises a polyester resin having ethylene A biaxially oriented polyester film comprises a polyester resin having ethylene terephthalate and ethylene isophthalate repeating units in a weight ratio of 90:10 to 75:25; 0.02 to 0.06 weight % of an organic phosphite or phosphate ester; and 0.01 to 0.05 weight % of a hindered phenol compound, wherein the film possesses good thermal stability, processability, and thermal adhesive strength to a metal surface and is useful in forming the inner laminate layer of a metal container.