Patent ID: 8035589

Claim:
A drive method of a liquid crystal display device which drives a liquid crystal cell in a vertical alignment mode by a normally black mode, the method comprising the step of: (i) generating plural sets of output video data supplied to a pixel, in response to each input cycle of inputting input video data to the pixel, said plural sets of output video data being generated for driving the pixel in a lime-sharing fashion, the step (i) including the sub steps of: (I) in case where the input video data indicates luminance lower than a threshold, setting luminance of at least one of said plural sets of output video data to be at a value within a luminance range for dark display, and controlling a time integral value of the luminance of the pixel in periods in which the pixel is driven based on said plural sets of output video data, by increasing or decreasing luminance of at least one of remaining sets of output video data; and (II) in case where the input video data indicates luminance higher than the threshold, setting at least one of said plural sets of output video data to be at a value within a luminance range for light display, and controlling a time integral value of the luminance of the pixel in periods in which the pixel is driven based on said plural sets of output video data, by increasing or decreasing luminance of at least one of the remaining sets of output video data, in the sub step (I), at least one of said plural sets of output video data indicating luminance other than black, when the input video data indicates black, the luminance other than black being less than or equal to about 3% of a maximum luminance for light display.