| 摘要 |
<p>The present invention uses linear chromaticity conversion to carry out color reproduction of an LCD compatible with a CRT. According to the invention, an inputted signal is subjected to a similar processing to a conventional case in a signal processing portion which is used in a conventional CRT display. A light source chromaticity conversion processing portion carries out a gamma correction to the signal inputted from the signal processing portion in a gamma operation portion by using gamma 1 = gamma crt of the same nonlinear characteristics as the CRT, and further carries out an operation of a chromaticity conversion matrix in a matrix operation portion.AnLCD inverse gamma correction portion uses gamma 2 establishing gamma _1cd = gamma 1cd/ gamma 2 = 1 to carry out an inverse gamma correction to the inputted signal. An LCD gamma characteristic operation portion carries out a gamma correction using gamma characteristics of an LCD to the signal inputted from the LCD inverse gamma correction portion, outputs a picture signal of a luminance level (X, Y, Z), and causes an image to be displayed on the not-shown LCD. <IMAGE></p> |
