Abstract: Disclosed are an outer ring for an oil pump having an increased number and size of open pores in a surface of a molded article and a method for manufacturing the outer ring.

Abstract: Disclosed are an image quality improvement device and method. The image quality improvement device includes a filter which separates an input video signal into a luminance signal and a chrominance signal, and a noise reduction unit which detects a motion in the input video signal by using the luminance signal separated by the filter, and thereby performing different filtering operations according to the existence of the motion.

Abstract: Disclosed are a display apparatus, a system and a method for outputting data, the display apparatus including: a video signal processor which processes a video signal; a display unit which displays an image based on the processed video signal; an encoder which encodes data into binary data; a light emitting diode (LED) unit which outputs a visible ray signal corresponding to the binary data; and a controller which controls the encoder to encode the data into the binary data, and controls the LED unit to flicker to output the visible ray signal based on the binary data to an outside in response to a request for an output of the data. Accordingly, the existing LED unit mounted to the display apparatus can be used for wireless communication based on visible ray, thereby enhancing economical efficiency.

Abstract: Disclosed are an image quality improvement device and method. The image quality improvement device includes a filter which separates an input video signal into a luminance signal and a chrominance signal, and a noise reduction unit which detects a motion in the input video signal by using the luminance signal separated by the filter, and thereby performing different filtering operations according to the existence of the motion.

Abstract: A black/white stretching system using R, G, B information and a method thereof. The black/white stretching system includes a first transformer to transform a luminance value and a color difference value of an input image to R, G, B values of each pixel, a histogram estimator to estimate a histogram distribution by accumulating each of the transformed R, G, B values of each pixel of the input image with a same weight, a mapper to generate mapped R?, G?, B? values by mapping the transformed R, G, B values according to a mapping function generated based on the estimated histogram distribution, and a second transformer to generate an output image by reverse-transforming the mapped R?, G?, B? values from the mapper to an updated luminance signal and an updated color difference signal. Therefore, the black/white stretching system prevents color distortion generated in a primary color image using only luminance information.