Signal processing device for liquid crystal display panel and liquid crystal display including the signal processing device

A liquid crystal display comprising:

• a signal processing device that receives a previous image data of a previous frame and a present image data of a present frame and sequentially outputs a first compensation image data and a second compensation data;
• a data driver that outputs the first compensation data voltage in response to the first compensation image data during a first sub-frame of the present frame and outputs the second compensation data voltage in response to the second compensation image data during a second sub-frame of the present frame;
• a gate driver that outputs a gate signal;
• and
• a liquid crystal display panel that sequentially displays a first sub-image corresponding to the first compensation data voltage and a second sub-image corresponding to the second compensation data voltage in response to the gate signal,
• wherein the signal processing device comprises:
• a motion interpolator that calculates a motion vector using the previous image data of the previous frame and the present image data of the present frame and generates an intermediate image data based on the motion vector;
• a look-up table that stores a plurality of reference gray scales, transposes a target gray scale of the intermediate image data into a first reference gray scale based on a combination of the previous image data and the intermediate image data, and outputs the first reference gray scale as a first transposed image data, the first reference gray scale corresponding to an image displayed on the liquid crystal display panel by the intermediate image data;
• a memory that stores the present image data and the first transposed image data and sequentially outputs the first transposed image data and the present image data during the present frame;
• and a data compensator that receives the first transposed image data and the present image data from the memory, compensates the first transposed image data to generate the first compensation image data, compensates the present image data to generate the second compensation image data, and compensates response characteristics of the liquid crystal display panel based on the first and second compensation image data,
• wherein the present frame comprises the first sub-frame and the second sub-frame that are successive in time, and the memory outputs the first transposed image data during the first sub-frame and outputs the second transposed image data during the second sub-frame, and
• wherein the look-up table receives the present image data, transposes the gray scale of the present image data into a second reference gray scale based on the combination of the present image data and the intermediate image data, and outputs the second reference gray scale as a second transposed image data.