A method for optimizing pixel signals for a liquid crystal display, wherein the liquid crystal display is a vertical alignment type. comprising: receiving red, R, green, G and blue, B data in an auto color compensator comprising a red look up table for converting the R data, a green look-up table for converting the G data and a blue look up table for converting the B data, to separately adjust the R, G and B data to represent separate R, G and B gamma curves, wherein the red green and blue image data are separately adjusted to represent separate red, green and blue gamma curves; and receiving a first pixel signal for an (n-i)th frame from the auto color compensator in a gray scale data compensating part; receiving a second pixel signal for an (n)th frame from the auto color compensator in the gray scale data compensating part; wherein the first pixel signal and the second pixel signal are a first potential and a second potential respectively corresponding to gray levels of a same pixel for each of red, green and blue data; wherein by, for each of the R, G and B data: determining if the first pixel signal and the second pixel signal meet a first predetermined condition; and compensating the first pixel signal for pre-tilting liquid crystal molecules if the first predetermined condition is satisfied; wherein the first predetermined condition is satisfied if the first potential corresponds to black and the second potential corresponds to a predetermined gray level substantially whiter than black, and the step of compensating the first potential if the first condition is satisfied comprises increasing the first potential for pre-tilting liquid crystal molecules. further comprising: storing the first pixel signal or the compensated first pixel signal; determining if the first pixel signal or the compensated first pixel signal and the second pixel signal satisfy a second predetermined condition; and compensating the second pixel signal only if the second predetermined condition is satisfied, wherein the second predetermined condition is satisfied if the first potential or the compensated first potential correspond to black and the second potential corresponds to a gray level substantially whiter than black or if the first potential is white and the second potential is a gray level substantially darker than white, the step of compensating the second pixel signal if the second predetermined condition is satisfied comprises increasing the second potential if the first potential or the compensated first potential corresponds to black and the second potential corresponds to a gray level substantially whiter than black or decreasing the second potential if the first potential is white and the second potential is a gray level substantially darker than white. receiving red, R, green, G and blue, B data in an auto color compensator comprising a red look up table for converting the R data, a green look-up table for converting the G data and a blue look up table for converting the B data, to separately adjust the R, G and B data to represent separate R, G and B gamma curves, wherein the red green and blue image data are separately adjusted to represent separate red, green and blue gamma curves; and receiving a first pixel signal for an (n-i)th frame from the auto color compensator in a gray scale data compensating part; receiving a second pixel signal for an (n)th frame from the auto color compensator in the gray scale data compensating part; wherein the first pixel signal and the second pixel signal are a first potential and a second potential respectively corresponding to gray levels of a same pixel for each of red, green and blue data; determining if the first pixel signal and the second pixel signal meet a first predetermined condition; and compensating the first pixel signal for pre-tilting liquid crystal molecules if the first predetermined condition is satisfied; wherein the first predetermined condition is satisfied if the first potential corresponds to black and the second potential corresponds to a predetermined gray level substantially whiter than black, and the step of compensating the first potential if the first condition is satisfied comprises increasing the first potential for pre-tilting liquid crystal molecules. storing the first pixel signal or the compensated first pixel signal; determining if the first pixel signal or the compensated first pixel signal and the second pixel signal satisfy a second predetermined condition; and compensating the second pixel signal only if the second predetermined condition is satisfied, wherein the second predetermined condition is satisfied if the first potential or the compensated first potential correspond to black and the second potential corresponds to a gray level substantially whiter than black or if the first potential is white and the second potential is a gray level substantially darker than white, the step of compensating the second pixel signal if the second predetermined condition is satisfied comprises increasing the second potential if the first potential or the compensated first potential corresponds to black and the second potential corresponds to a gray level substantially whiter than black or decreasing the second potential if the first potential is white and the second potential is a gray level substantially darker than white.