Patent ID: 8063863

Claim:
A picture display apparatus for displaying a picture corresponding to an input picture signal via a liquid crystal display surface, comprising: a driving level correction unit for correcting a driving level based on said input picture signal; a converter for converting the grayscale level of a signal supplied thereto into a plurality of correction levels for expressing said grayscale level by synthesis of transmittances of a plurality of temporally consecutive fields; and a driving unit for driving said liquid crystal display surface by a driving signal generated via said driving level correction unit and said converter; said converter generating said correction levels so that each picture image of said input picture signal includes at least a first field and a second field, said first field having transmittance converted to a transmittance corresponding to the grayscale level of said input picture signal added by a positive correction value; said second field having transmittance converted to a transmittance corresponding to the grayscale level of said input picture signal added by a negative correction value; said driving level correction unit performing driving level correction of signal values of said first field or said second field or both, depending on effective response characteristics of the liquid crystal driven by said driving unit, in case time changes of the grayscale level have occurred at the same spatial position of said input picture signal; and said driving level correction unit computing the correction value of said driving level in accordance with (i) a first computing process when at least each of signal values of at least three consecutive fields representing a temporally previous grayscale level and a next grayscale level at a spatial position is less than a predetermined level, and (ii) a second computing process when the signal value of one of the at least three consecutive fields is larger than the predetermined level, wherein in the first computing process, a determination is made whether a signal value of a field of the at least three consecutive fields which is a temporally first field representing the previous grayscale level is not greater than a signal value of a field of the at least three consecutive fields which is a temporally first field representing the next grayscale level.