Liquid crystal display, and device and method of modifying image signal for liquid crystal display

An image signal modifying method of a liquid crystal display, comprising:

• receiving a first image signal, a second image signal and a third image signal during three continuous frames;
• decoding compressed information stored in a memory, in which a three-dimensional (3-D) lookup table is coded, to generate a restored 3-D lookup table;
• generating a modified signal based on the first image signal, the second image signal, the third image signal and the restored 3-D lookup table;
• and
• converting the modified signal into a data voltage and supplying the data voltage to a pixel.

An image signal modifying device for a liquid crystal display, comprising:

• a memory which stores compressed information in which a three-dimensional (3-D) lookup table is coded;
• and
• an image signal modifying unit which decodes the compressed information to generate a restored 3-D lookup table, and generates a modified signal based on a first image signal of a first frame, a second image signal of a second frame, a third image signal of a third frame and the restored 3-D lookup table,
• wherein the 3-D lookup table includes a plurality of two-dimensional (2-D) lookup tables corresponding to a plurality of reference first image signals, and
• wherein a plurality of 2-D lookup tables include a plurality of reference modified signals corresponding to a plurality of reference second image signals and a plurality of reference third image signals.