Color signal processing apparatus and method

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

1 . A color display apparatus comprising,
 a light source to emit light; and   a color wheel to separate the emitted light into a plurality of primary colors,   wherein free controllable additional light generated by the color wheel from the emitted light of the light source adjusts at least one of the plurality of primary colors to generate at least one target primary color.   
     
     
         2 . The color display apparatus of  claim 1 , wherein the color display apparatus produces an output video based on the plurality of target primary colors, the output video having a higher brightness than an output video based on original primary colors produced from original primary color light of the plurality of primary colors. 
     
     
         3 . The color display apparatus of  claim 1 , wherein the color display apparatus produces an output video based on the at least one target primary color, the output video having a higher contrast than an output video based on original primary colors produced from the original primary color light of the plurality of primary colors. 
     
     
         4 . The color display apparatus of  claim 1 , wherein the color wheel includes a plurality of spokes to generate the free controllable additional light from the emitted light of the light source. 
     
     
         5 . The color display apparatus of  claim 1 , further comprising:
 a target primary color calculator to calculate a target color gamut including color signal values of each pixel of an input video and to calculate the at least one target primary color corresponding to the calculated target color gamut;   a primary color reconstructor to produce the calculated at least one target primary color by controlling the operation of the color wheel; and   a video data converter to convert the color signal values of each pixel of the input video so that the color signal values match the calculated target color gamut defined by the calculated at least one target primary color.   
     
     
         6 . The color display apparatus of  claim 5 , further comprising: a color coordinates converter that corrects non-linear color signals to standard linear color signals, if an input video includes non-linear color signals. 
     
     
         7 . A method of displaying an output video, the method comprising:
 emitting light with a light source; and   separating the emitted light into a plurality of primary colors with a color wheel;   wherein free controllable additional light generated by the color wheel from the emitted light of the light source adjusts at least one of the plurality of primary colors to generate at least one target primary color.   
     
     
         8 . The method of  claim 7 , further comprising:
 producing the output video based on the plurality of target primary colors, the output video having a higher brightness than an output video based on original primary colors produced from original primary color light of the plurality of primary colors.   
     
     
         9 . The method of  claim 7 , further comprising:
 producing the output video based on the at least one target primary color, the output video having a higher contrast than an output video based on original primary colors produced from the original primary color light of the plurality of primary colors.   
     
     
         10 . The method of  claim 7 , wherein the free controllable additional light from the emitted light of the light source is generated by a plurality of spokes of the color wheel. 
     
     
         11 . The method of  claim 7 , further comprising:
 calculating a target color gamut including color signal values of each pixel of an input video and to calculate the at least one target primary color corresponding to the calculated target color gamut with a target primary color calculator;   producing the calculated at least one target primary color with a primary color reconstructor by controlling the operation of the color wheel; and   converting the color signal values of each pixel of the input video so that the color signal values match the calculated target color gamut defined by the calculated at least one target primary color with a video data converter.   
     
     
         12 . The method of  claim 7 , further comprising: correcting non-linear color signals to standard linear color signals with a color coordinates converter when an input video includes non-linear color signals.