YC SEPARATION TYPE VIDEO SIGNAL CONVERSION DEVICE AND VIDEO DISPLAY DEVICE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a YC separation type video signal conversion device and a video display device, capable of displaying an optimum image in high contrast and with little flare.;SOLUTION: A PJ1 for RGB outputs an optical signal on the basis of three primary color signals of an image to be displayed from a signal processing apparatus 3 for the YC separation type display. A PJ2 for Y receives a brightness signal Y input from the above apparatus 3 and the three primary color signals F₁(x) input from the PJ1 for RGB, and outputs an optical output F₂(X, Y) obtained by remodulating an optical output proportional to the brightness signal Y by an optical input X(=F₁(x)). The above apparatus 3 corrects the input three primary color signal x₁ of the PJ1 to a 1st signal level expressed by (α/β)^1/2× L^1/2, and corrects the brightness signal to a 2nd signal level expressed by (β/α)^1/2× L^1/2 (where, α and β are flare components in optical outputs of the PJ1, 2).;COPYRIGHT: (C)2008,JPO&INPIT