Patent ID: 7764258
Filing Date: 2010-07-27
Classification: G09G

Abstract:
1. A liquid crystal display apparatus comprising: synchronization signal extracting means for extracting a vertical synchronization signal from a noninterlace signal; first reversal signal generating means for generating a first polarity reversal signal that causes reversal of polarity of a signal voltage every frame for a switching device associated with each of pixels according to the vertical synchronization signal; reversal control signal generating means for generating a reversal control signal when an odd-numbered frame and an even-numbered frame comprise a predetermined number of pixels or more having a difference in luminance between the odd-numbered frame and the even-numbered frame of the noninterlace signal that exceeds a predetermined threshold value, and the odd-numbered frame and the even-numbered frame are repeatedly inputted to the reversal control signal generating means for a plurality of frames greater than or equal to a predetermined number of times; second reversal signal generating means for outputting a second polarity reversal signal according to the reversal control signal, wherein the second reversal signal generating means outputs the second reversal signal every frame according to a vertical synchronization period in synchronization with the vertical synchronization signal by reversing polarity of the first polarity reversal signal when the reversal control signal is input, and wherein the second reversal control signal generating means outputs the first polarity reversal signal as the second reversal signal when the reversal control signal is not input; and switching device driving means for driving each of switching devices according to the second polarity reversal signal.