Patent ID: 8884860

Claim:
A liquid crystal display comprising: a pixel; an image signal modifier generating a modified signal based on a first image signal of a first frame, a second image signal of a second frame, and a lookup table; and a data driver converting the modified signal into a data voltage and supplying the data voltage to the pixel, wherein the lookup table stores a plurality of reference modified signals for a plurality of reference first image signals and a plurality of reference second image signals, and the lookup table includes: a first lookup table in which a difference between the reference first image signals and the reference second image signals is equal to x, wherein x is a natural number; and a second lookup table in which a difference between the reference first image signals and the reference second image signals is equal to y, wherein y is a natural number greater than x, wherein the second lookup table has larger gradations between entries than does the first lookup table, wherein a gray level of the reference first image signals is less than N in the first lookup table, wherein N is a natural number, and a gray level of the reference first image signals is greater than N in the second lookup table, and wherein when the gray level of the first image signal is less than N, the image signal modifier generates the modified signal based on the first lookup table and not the second lookup table, and when the gray level of the first image signal is not less than N, the image signal modifier generates the modified signal based on the second lookup table and not the first lookup table.