Abstract: The present invention relates to a high-density optical disk having thin film layer made from a thermochromic polymer with a red-shift which exhibits self-focusing and optical bleaching. After an incident light beam passes through the polymer medium, not only can the spot size of the beam be reduced but also transmittance can be enhanced due to these kinds of third-order nonlinear optical response. Thus, a high-density disk structured according to the present invention is capable of the signal reproduction resolution beyond the diffraction limit with an efficient reflectivity. Accordingly, data recording density of a high-density disk can be improved greatly.

Abstract: Disclosed is a method of driving a plasma display panel enabling to improve an overall contrast characteristic of the plasma display panel by reducing a voltage difference between scan and sustain electrodes Y and Z to decrease an emission amount of light generated by a discharge between the scan and sustain electrodes Y and Z. The present invention includes a first step of applying a reset pulse to the scan electrode to form predetermined wall charges on the electrodes for a set-up period and a second step of applying a pulse of a predetermined level to the sustain electrode to reduce a voltage difference between the scan and sustain electrodes while the reset pulse is applied.

Abstract: The present invention relates to an accessory tool mounting device for a vacuum cleaner by which accessory tools S can be detachably mounted on a main body 50 of the vacuum cleaner. The accessory tool mounting device according to the present invention is used with a vacuum cleaner including a suction means installed therein, a plurality of wheels installed at an end of the bottom thereof, and exhaust portions for filtering out foreign substances contained in air drawn by the suction means and exhausting the filtered air.

Abstract: An apparatus including a first mixer, a second mixer, an oscillator, and a frequency divider. The oscillator is coupled to the first mixer, for processing a signal of a first communication protocol. The frequency divider comprises an input and an output. The input of the divider is coupled to the oscillator and the output of the divider is coupled to the second mixer. The second mixer is for processing a signal of a second communication standard. The embodiments of the present invention are advantageous, as a single oscillator can be utilized for driving both a first mixer and second mixer at different frequencies. Accordingly, separate oscillators are not needed for the first mixer and the second mixer. These embodiments simplify the circuit structure of a tri-mode mobile terminal and consequently allow for tri-mode mobile terminals to have a smaller size and weight.

Abstract: A method for adjusting data transmission speed in a VOD (video on demand) service system, wherein video data from a VOD server is transmitted to a mobile communication terminal in accordance with a VOD service request is provided. In accordance with one aspect of the invention, the method comprises analyzing power control information transmitted between a base station and a mobile communication terminal, wherein the base station provides the means of communication between the mobile communication terminal and a VOD server. The transmission speed of video data transmitted to the mobile communication terminal from the VOD server is then adjusted based on the power control information.

Abstract: A forward-link power control method is disclosed. The forward power control is performed by receiving at least one reverse link channel that informs channel quality information of a forward link, and determining a power of a channel to be transmitted to the forward link according to the channel quality information.

Abstract: A video processing method and apparatus for displaying a signal input in an analog form in a digital TV is disclosed. The present invention eliminates an interference between signals by unifying a flow of analog video signals having different formats, and several signal formats are processed without change through a basic construction of the hardware. Also, the efficiency is increased by utilizing an ADC, a clock and a clamp pulse generation in common for signals based on different formats. Furthermore, a stable interface operation is executed by reconstructing a horizontal synchronization with a constant width in a clock base, and performing a combination and a separation of digital signals on the basis of such construction.

Abstract: A clamping device of a disk drive including a driving source, a driving member rotated by the driving force of the driving source; a clamping member for clamping a disk while being ascended and descended by virtue of a rotation movement of the driving member; a clamping member ascending and descending unit for switching the rotation movement of the driving source to ascending and descending movement of the clamping member, and elastically supporting the disk on a turntable while the disk is being mounted on the turntable; and an elastic press member installed on the upper surface of the driving member, for pressing the clamping member in the direction where the disk is positioned. The elastic support arm, which is thin and has a desirable restoring force, is driven by the rotation movement of the clamp driving member, thereby ascending and descending the clamper. Thus, the overall construction is thin, light and small as well as ensuring the firm and reliable clamping of the disk.

Abstract: A linear power amplifying apparatus is disclosed. In case where the phases of the signal amplified in the main amplifier and of the input signal are compared, the amplified signal and the input signal are distributed and then coupled with a predetermined phase difference, thereby reducing the error component and widening the tolerance band which can attenuate the carrier as much as desired, so that the phase controlling for carrier attenuation is facilitated. In addition, in case where the phase of the error signal amplified in the error amplifier and that of the input signal amplified in the main amplifier are compared, the error signal and the input signal are distributed and then coupled with a predetermined phase difference, thereby reducing the error component and widening the tolerance band which can attenuate the error as much as desired, so that the phase controlling for error attenuation is facilitated.

Abstract: There is provided a method for preparing an anatase type titanium dioxide photocatalyst having a particle size of nano level without a need of the sintering process at high temperature, and an anatase type titanium dioxide photocatalyst having a particle size nano level. The method for preparing an anatase type titanium dioxide photocatalyst having a particle size of nano level includes adding a titanium-based starting material to a selected solvent and adding an acid or base catalyst to the resulting aqueous solution. Next, subjecting the catalyst-containing aqueous solution to heat treatment at about 80±20° C. to activate peptization thereby preparing an anatase type titanium dioxide sol solution. Finally, the anatase type titanium dioxide sol solution is coated onto a support to complete the preparation of the photocatalyst.

Abstract: In a deflection yoke for a braun tube deflecting an electron beam radiated from an electron gun to a screen and including a horizontal deflection coil, a vertical deflection coil and a ferrite core, the horizontal deflection coil is installed inside a funnel, the ferrite core is installed outside of the funnel, the vertical deflection coil is installed inside or outside of the funnel, accordingly the convergence and deflection sensitivity of an electron beam can be easily compensated, the deflection sensitivity of a braun tube can improve, and the degree of freedom in designing the deflection yoke and an electron gun related to enlarging a diameter of the electron gun can increase.

Abstract: Disclosed are a deinterlacing method and apparatus based on a motion-compensated interpolation (MCI) and an edge-directional interpolation (EDI). The disclosed deinterlacing method and apparatus are characterized in that the deinterlacing of a video is conducted using both the MCI and EDI schemes in a single deinterlacing system. An input video signal of an interlaced scan format passes through an MCI block, an EDI block, and a line averaging interpolation (LAI) block, respectively. Respective resultant video signals outputted from the MCI and EDI blocks then pass through MCI and EDI side-effect checking blocks. Based on the checking results outputted from the side-effect checking blocks, a decision and combination block selects a desired one of the MCI, EDI, LAI pixel indices. The decision and combination block selects an output from the MCI block when MCI is superior whereas it selects an output from the EDI block when EDI is superior.

Abstract: A method and apparatus for focus control of an optical disk drive is disclosed. The method for focus control in accordance with the present invention changes focus servo loop characteristics when the optical pickup moves rapidly to perform track search operations so that the vibration of the objective lens is effectively attenuated, thereby allowing stable focus control and high-speed access capability.

Abstract: The present invention relates to a method for determining an optimum recording power of an optical disk. The present invention is capable of improving accuracy of an OPC result by minimizing error between the optimum recording power and reference recording power due to writing method difference and manufacture difference of each manufacturer by dividing a certain region for the test recording into a power scan region for searching the optimum recording power and a compensation region for compensating the rotating elements of the optical disk when data is recorded on the optical disk, determining the optimum recording power reflected influence by the rotating elements of the optical disk, storing it on a memory and using it in the next OPC operation.

Abstract: Method for fabricating a cathode in a cathode ray tube, the cathode having a cathode sleeve with a heat radiative coating layer formed on an inside wall thereof for emission of thermal electrons, the heat radiative coating layer being formed by a method including the steps of (a) coating a material of the heat radiative coating layer on a surface of a metal wire provided separately, (b) inserting the metal wire having the heat radiative coating layer coated thereon, to pass through an opening the cylindrical cathode sleeve, and (c) heating the metal wire by providing a power thereto, to deposit the material of the heat radiative coating layer coated on the metal wire on the inside wall of the cathode sleeve, whereby permitting to coat many number of cathode sleeves at a time, and to form a film of uniform composition and even thickness to enhance electron emission.

Abstract: The present invention relates to a frame for a color CRT having a square framework includes a plurality of beads for strengthening stiffness of the frame formed on the framework including corner portions in order to prevent distortion of the shadow mask. The beads formed on the corner portions are stepped beads having at least two steps. The present invention is capable of strengthening the stiffness of the frames, and increasing an impact character and a vibration character by improving shapes of the beads on the corner portions where stress is concentrated.

Abstract: A plasma display apparatus having a structure capable of improving a light efficiency is disclosed. The reflecting mirror plane or a metal reflecting film is formed on a back surface of a back plate of the plasma display apparatus, so that the back face light is reflected more than 95%, and thus, the light loss due to the back face light can be minimized, so that the light efficiency of the plasma display apparatus can be heightened. Especially, by forming the reflecting film having almost the same diameter as that of the discharge cell and a predetermined curvature at the positions corresponding to the discharge cells on the rear plate of the plasma display apparatus, the light interference between the discharge cells due to the reflected light can be prevented. Also, since the reflecting film serves as a high frequency blocking film, the loss of high frequency of the high frequency plasma display apparatus can be prevented.

Abstract: A color CRT having an inner shield being mounted at a frame inside a panel and a funnel to shield an earth magnetic field, in which the inner shield comprises: a vertical portion formed in parallel to the central axis of the CRT and mounted at the frame, a slope portion extended slanted against the central axis of the CRT at a rear side of the vertical portion and a notch with its central portion formed concave at the end portion of the slope portion, the opposite of the frame; and on the assumption that the entire height of the inner shield constructed with the vertical portion and the slope portion is ‘V’, a height (V1) of the vertical portion satisfies the relational expression of 0.18≦V1/V≦0.25, and on the assumption that the shortest height from a starting point of the vertical portion to the notch is V2, the height V1 of the vertical portion satisfies a relational expression of 0.40≦V1/V2≦0.54.

Abstract: The present invention relates to a DCT operator for compressing image data through dividing the image data into various frequency components by using a spatial correlation on a screen, particularly to be fit with a low-power required mobile video terminal. Therefore, the present invention provides a DCT operator, in which a range of DCT coefficients for a calculation is controllable among an entire DCT region, and also provides, in another embodiment, a 2D DCT device including a first 1D DCT operator for executing a 1D DCT operation in rows about input image data; a transposition memory for temporarily storing a result of the 1D DCT operator; a second 1D DCT operator for executing a 1D DCT operation in columns about the resultant data processed by the 1D DCT operation in rows and stored in the transposition memory; and a timing control logic unit for controlling operation of the first and second 1D DCT operators and the transposition memory according to a DCT block size control signal given from outside.

Abstract: Disclosed is a manufacturing apparatus for a plasma display panel (PDP) to form a fluorescent material film in the PDP, the apparatus comprising a lower table; a lower rail formed on the lower table; a panel mounting portion operated on the lower rail for mounting a panel detachably; an upper fixation plate installed above the lower table; and a plurality of fluorescent material ink spread units fixed to the upper fixation plate and having a plurality of nozzle holes corresponding to non-applied rows for forming fluorescent material on the fluorescent material film of the panel, wherein a sophisticated spread of the fluorescent material is performed more efficiently.