Abstract: A method of processing an image signal includes: converting a source image signal into an image signal corresponding to a color space for a color gamut mapping; reducing a color gamut of the image signal; and mapping the image signal corresponding to colors within the reduced color gamut into an image signal corresponding to colors within a display color gamut, wherein the colors of the display color gamut are displayed by a display panel.

Abstract: A color signal processing apparatus calculates a target color gamut including color signal values of each pixel of an input video, and calculates target primary colors corresponding to the calculated target color gamut. The color signal processing apparatus produces the calculated target primary colors by mixing primary colors in an input color gamut of the input video, and converts and outputs the color signal values of each pixel of the input video to match the calculated target color gamut defined by the calculated target primary colors. Since it is possible to adaptively transform the input color gamut of the input video, the input video that is reproduced has an increased light quantity and an enhanced contrast.

Abstract: A method of processing an image signal includes: converting a source image signal into an image signal corresponding to a color space for a color gamut mapping; reducing a color gamut of the image signal; and mapping the image signal corresponding to colors within the reduced color gamut into an image signal corresponding to colors within a display color gamut, wherein the colors of the display color gamut are displayed by a display panel.

Abstract: A color signal processing apparatus calculates a target color gamut including color signal values of each pixel of an input video, and calculates target primary colors corresponding to the calculated target color gamut. The color signal processing apparatus produces the calculated target primary colors by mixing primary colors in an input color gamut of the input video, and converts and outputs the color signal values of each pixel of the input video to match the calculated target color gamut defined by the calculated target primary colors.

Abstract: Provided are an apparatus using ambient light as backlight and a method for correcting colors in the apparatus. The apparatus includes a color correction matrix generator and a color corrector. The color correction matrix generator generates a first color correction matrix for correcting a second color conversion matrix when ambient light is used as backlight into a third color conversion matrix for the original backlight. The color corrector corrects colors using the first color correction matrix.

Abstract: A display device including: a main body through which external light is transmitted, the main body having a display panel on which an image is formed; and a cover slidably coupled to the main body, wherein external light is supplied to the main body when the cover is slid to expose the main body. Accordingly, the display device can display an image by selectively using external light such as sunlight or illumination light, or a backlight unit.

Abstract: An intelligent color gamut management method. The intelligent color gamut management method performs a saturation mapping and a luminance mapping separately according to a characteristic of a target device, thereby enabling the target device to represent a natural color image. Accordingly, it is possible to reduce color reproduction distortion of an image between different color devices having different color gamuts and also reproduce a natural color image, and also, secondary CMY colors, which vary depending on a color temperature, can be adjusted to be more natural. Since the color gamut boundary can be easily obtained, a memory capacity can be saved a freedom of algorithm can be increased.

Abstract: A display device using external light and including: a light guide panel guiding light; an internal light source disposed on at least one side of the light guide panel and supplying internal light to the light guide panel; an optical filter disposed on a rear surface of the light guide panel to be exposed to the outside, and reflecting light with specific wavelengths and transmitting light with wavelengths other than the specific wavelengths among the internal light emitted from the internal light source and external light; and a display panel forming an image using the internal light and the external light which are illuminated through the light guide panel and the optical filter. The display device improves visibility using both external light and internal light by simply adding the optical filter to an existing display device.

Abstract: A digital image processing apparatus and a method thereof. The apparatus includes a CCD to photoelectrically transform an optical image which is imaged through a lens part, using a mosaic color filter array pattern, a buffer to store a color data output from the CCD by a pixel, in a predetermined unit, and an ADSE logic to color-interpolate a spatially missing color data by adaptively applying a luminance significance element value to a certain color interpolation method, the luminance significance element value indicating contribution of each color to an entire luminance with respect to each pixel color data stored in the buffer.

Abstract: A spoke-processing apparatus usable with sequential color display devices using spokes depending on a color saturation and a luminance of an input color signal.

Abstract: A scene adaptive power control device using a plurality of input images as consecutive input images and controlling a power level of a light source used in displaying the third input image. The scene adaptive power control device including a histogram analysis unit to analyze the second input image and detect a first maximum brightness value of the second input image, a determination unit to detect brightness values matching a first threshold as a predetermined frequency value in the generated histogram and determining a second maximum brightness value, a generation unit generating a power control signal to control the power level of the light source by a value obtained by dividing the second maximum brightness value by the first maximum brightness value, and a compensation unit increasing a brightness of the third input image inversely proportional to the power level of the light source reduced by the power control signal.

Abstract: Provided are a method and apparatus for generating a wide color gamut signal in an image capturing device, which can simplify a calculation process and minimize color distortion therein. The apparatus includes a gamma-correction unit gamma-correcting a picked-up image signal by using gamma curve information predetermined according to an output format; an interpolation unit interpolating the gamma-corrected image signal as a linear image signal which is to be expressed on a display; a color gamut conversion unit converting the interpolated image signal into a standard RGB signal by using a color conversion matrix; a color expansion unit expanding the standard RGB signal to a wide color gamut signal by using a gamut conversion matrix; and a signal correction unit correcting the wide color gamut signal by a predetermined correction gain value.

Abstract: An image pickup apparatus and a method for extending a dynamic range thereof are provided. The image pickup apparatus includes a luminance and chrominance signal generator which generates a luminance signal and a chrominance signal; and a dynamic range extender which extends and outputs dynamic ranges for both the luminance signal and the chrominance signal, which are generated by the luminance and chrominance signal generator, based on current frame data and previous frame data. Therefore, a dynamic range for an image signal having a low gray level can be extended while an increase in noise can be prevented, by increasing the power of an output signal using current frame data and previous frame data.

Abstract: A method of converting a video signal and an apparatus therefor are provided. According to the method, a type of film to be referred to in order to convert a video signal is selected, and by referring to the characteristic of the selected type of the film, an input video signal is converted.

Abstract: An apparatus for color compensation includes a chroma deflection generation unit to calculate a chroma deflection based on an input chroma signal and a predetermined first reference value, a hue deflection generation unit to calculate a hue deflection based on an input hue signal and a predetermined second reference value, a chroma deflection function generation unit to calculate a luminance deflection based on an input luminance signal and a predetermined third value, and a tone mapping function generation unit to output the chroma signal, hue signal and luminance signal after individually compensating these signals based on the chroma deflection, hue deflection and luminance deflection. According to the present invention, when color is distorted due to transmission flaws, the color can be compensated to be an appropriate color.

Abstract: A 3-dimensional image is generated from an input 2-dimensional image based upon illuminative characteristics of the input image by filtering the 2-dimensional input image with filters of different orientations, outputting base shading images corresponding to the filters, extracting positive pixel values for each base shading image, calculating a difference between the pixel values of the input image and the extracted positive pixel values, calculating a median value of the calculated difference, selecting the filter to output a base shading image of smallest median, outputting a shading image by filtering the input image with the selected filter, combining the input image with the shading image and outputting the 3-dimensional image based upon the combined image. A previously selected filter for a preceding image can be considered when selecting a filter for a current image, enabling generation of 3-dimensional moving pictures.

Abstract: Provided are an apparatus using ambient light as backlight and a method for correcting colors in the apparatus. The apparatus includes a color correction matrix generator and a color corrector. The color correction matrix generator generates a first color correction matrix for correcting a second color conversion matrix when ambient light is used as backlight into a third color conversion matrix for the original backlight. The color corrector corrects colors using the first color correction matrix.

Abstract: Provided are an image display apparatus with a frame rate conversion function and a frame-rate conversion method thereof. The image displaying apparatus includes a frame rate conversion (FRC) part which converts and outputs a frame rate of an input image signal depending on a motion of an image, and a display which processes the input image signal that is output from the FRC part to display on a screen. Therefore, a motion judder can be decreased so that an image quality can be enhanced and power consumption can be reduced.

Abstract: A method of enhancing a color temperature of a color image includes calculating gains for input image signals based on a predetermined gain function. A first offset value corresponding to a change in a pedetermined color temperature of output signals is calculated. A second offset value is calculated based on the gains and the first offset value. The second offset value is added to a B signal of the output signals. A compensation gain is calculated in consideration of intensity of the B signal to which the second offset value is added. The compensation gain is added to a G signal. Thus, a desired color temperature can be obtained regardless of the intensities of R, G, and B signals.

Abstract: A display device using external light and including: a light guide panel guiding light; an internal light source disposed on at least one side of the light guide panel and supplying internal light to the light guide panel; an optical filter disposed on a rear surface of the light guide panel to be exposed to the outside, and reflecting light with specific wavelengths and transmitting light with wavelengths other than the specific wavelengths among the internal light emitted from the internal light source and external light; and a display panel forming an image using the internal light and the external light which are illuminated through the light guide panel and the optical filter. The display device improves visibility using both external light and internal light by simply adding the optical filter to an existing display device.