Abstract: An apparatus and method for eliminating an afterimage state occurring on a liquid crystal display (LCD) panel. The apparatus includes a memory for storing an input video signal, a data comparator for comparing data read from or written into the memory, a controller for outputting a previously stored RGB (red, green, and blue) signal for on screen display (OSD) if it is determined according to the comparison result of the data comparator that the data read from or written into the memory are maintained in the same state for a predetermined time, a signal processing unit for converting the input video signal into a desired format by writing the input video signal into the memory and reading the input video signal from the memory and for outputting a converted video signal, and displaying a moving picture, instead of the converted video signal, on an LCD if the RGB signal for OSD is output from the controller.

Abstract: An apparatus and a method for use in a color display system, for calculating a color temperature. The apparatus for calculating color temperature includes a color temperature selecting portion for selecting a left color temperature and a right color temperature that are most adjacent to a one-dimensional chroma inputted from a mapping table, the mapping table consisting of chroma and color temperature, a distance calculating portion for calculating distance between the selected left color temperature and the inputted one-dimensional chroma, and between the selected right color temperature and the inputted one-dimensional chroma, respectively, and a color temperature calculating portion for calculating a color temperature corresponding to the one-dimensional chroma inputted in accordance with a ratio of the calculated distance. Accordingly, the apparatus and method can be established using little hardware since the color temperature is calculated at a one-dimensional level.

Abstract: A matrix calculator calculates multiplication of two matrices. The matrix calculator includes an element selecting portion for selecting elements from elements of the two matrices that would constitute sub-elements of each element of a multiplication result matrix and sequentially outputs the selected element, a calculating portion for adding products of output from the element selecting portion and sequentially outputs the elements of the result matrix, and a control signal generating portion for generating a control signal that controls a timing of operation of the calculating portion and the storing portion. Since the respective elements of the two matrices are sequentially selected to be multiplied and added, the elements of the multiplication result matrix, which are the sums of the sub-elements, can be calculated sequentially. Accordingly, since the matrix calculator can be constructed of one adder and one multiplier and a control circuit, the size of the circuit is reduced.

Abstract: A video process device includes: a display device rotatable with respect to a center point of a screen; a first screen dividing portion for processing first and second video signals into a double window video signal; a second screen dividing portion for processing the double window video signal and an inputted third video signal into a triple window video signal; and a controller for controlling the second screen dividing portion in order to transform a vertical and horizontal synchronization signal of the first, second and third video signals to correspond to the screen of the display device rotated by 90° when the display device is rotated by 90°. Accordingly, by realizing the triple window in consideration of the aspect ratio of 16.9 of the display device, problems such as image quality deterioration and signal distortion can be solved. Also, the opportunity to watch various broadcasting can satisfy a user's needs.

Abstract: An apparatus and method for eliminating an afterimage state occurring on a liquid crystal display (LCD) panel. The apparatus includes a memory for storing an input video signal, a data comparator for comparing data read from or written into the memory, a controller for outputting a previously stored RGB (red, green, and blue) signal for on screen display (OSD) if it is determined according to the comparison result of the data comparator that the data read from or written into the memory are maintained in the same state for a predetermined time, a signal processing unit for converting the input video signal into a desired format by writing the input video signal into the memory and reading the input video signal from the memory and for outputting a converted video signal, and displaying a moving picture, instead of the converted video signal, on an LCD if the RGB signal for OSD is output from the controller.

Abstract: An apparatus for converting color temperature in a color display system, and a method thereof. A first color temperature converting factor unit has a first color temperature converting factors for converting a first predetermined color temperature to a particular color temperature, and a second color temperature converting factor unit has a first color temperature converting factors for converting the particular color temperature to a second predetermined color temperature. A color temperature converting factor creating unit makes a color temperature converting factor for converting an input color temperature to an aiming color temperature based on a first converting factor selected from the first color temperature converting factors according to the input color temperature and based on a second converting factor selected from the second color temperature converting factors according to the input aiming color temperature.

Abstract: An apparatus and a method for use in a color display system, for calculating a color temperature. The apparatus for calculating color temperature includes a color temperature selecting portion for selecting a left color temperature and a right color temperature that are most adjacent to a one-dimensional chroma inputted from a mapping table, the mapping table consisting of chroma and color temperature, a distance calculating portion for calculating distance between the selected left color temperature and the inputted one-dimensional chroma, and between the selected right color temperature and the inputted one-dimensional chroma, respectively, and a color temperature calculating portion for calculating a color temperature corresponding to the one-dimensional chroma inputted in accordance with a ratio of the calculated distance. Accordingly, the apparatus and method can be established using little hardware since the color temperature is calculated at a one-dimensional level.

Abstract: A matrix calculator calculates multiplication of two matrices. The matrix calculator includes an element selecting portion for selecting elements from elements of the two matrices that would constitute sub-elements of each element of a multiplication result matrix and sequentially outputs the selected element, a calculating portion for adding products of output from the element selecting portion and sequentially outputs the elements of the result matrix, and a control signal generating portion for generating a control signal that controls a timing of operation of the calculating portion and the storing portion. Since the respective elements of the two matrices are sequentially selected to be multiplied and added, the elements of the multiplication result matrix, which are the sums of the sub-elements, can be calculated sequentially. Accordingly, since the matrix calculator can be constructed of one adder and one multiplier and a control circuit, the size of the circuit is reduced.

Abstract: An image reproducing apparatus and method are provide for setting and automatically changing audio and visual settings for a plurality of channels. The image reproducing apparatus which receives broadcasting signals of the plurality of channels comprises a command applying unit for setting user's audio and visual settings in accordance with a selected channel, a memory for storing data of initial audio and visual settings with respect to audio and video signals, and the user's audio and visual settings for each channel. A microprocessor controls the setting of data of the user's audio and visual settings for each channel set by the command applying unit to store the set data in the memory, and reads data of the user's audio and visual settings for a selected channel from the memory to output audio and video signals in accordance with the read data of the user's audio and visual settings.

Abstract: A compressor for compressing a refrigerant includes a discharge outlet, and a valve mechanism for controlling the opening and closing of the outlet. The valve mechanism comprises a reed normally biased to an outlet-closing position by a leaf spring which is yieldable under the pressure of compressed refrigerant applied to the reed to enable the reed to flex and open the outlet. A fixed valve stopper overlies the leaf spring for limiting the extent of travel of the leaf spring and reed when opening the outlet. The valve stopper includes a flat inner section spaced above the outlet by a uniform distance, and a convexly curved outer section extending from the flat section to a free end of the stopper. During a valve opening operation, an inner portion of the leaf spring collides with the flat section, but an outer free end of the leaf spring does not collide with the stopper, because of the curvature of the outer section of the stopper. Thus, potential damage to the outer end of the leaf spring is avoided.

Abstract: A compressor includes a reciprocating piston mounted in a cylinder for sucking-in refrigerant gas during a retraction stroke and then compressing and discharging the gas during a compression stroke. A front wall of the piston includes a through-hole, and carries a spring-biased closure for closing the through-hole. The closure can be opened counter to the spring force by the presence of an excessive pressure in front of the piston, in order to relieve that pressure. The closure projects forwardly beyond the piston front wall so as to also open the through-hole upon contacting an end plate of the cylinder during a compression stroke.