| 摘要 |
A color correction circuit includes a 3D-LUT, an off data generation circuit, an image signal switchover circuit, and an interpolation operation circuit. The off data generation circuit substitutes respective lower (k-n) bits of input R, G, and B signals R 2 , G 2 , and B 2 with a value '0' and outputs processed R, G, and B signals after the substitution as off data Or, Og, and Ob. The off data generation circuit accordingly gives the output equivalent to the output of the 3D-LUT on the assumption that the storage of the 3D-LUT is rewritten to have identical input and output. The image signal switchover circuit alternatively selects and outputs standard data Sr, Sg, and Sb input from the 3D-LUT and the off data Or, Og, and Ob input from the off data generation circuit according to the setting of an externally given correction prohibit signal F. The color correction function of the color correction circuit is thus readily activated and inactivated, in response to the correction prohibit signal F. The arrangement of the invention effectively attains size reduction of the circuit scale and prevents the disturbance of image display due to deviation of the signal transfer timing, while enabling inactivation of the color correction function.
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