Patent ID: 8111231
Filing Date: 2012-02-07
Classification: G09G,H04N

Abstract:
1. A liquid crystal display, comprising: a liquid-crystal cell array having a plurality of sets, the sets being configured by pixels and TFTs for driving the pixels respectively; a data-line drive circuit that scans data lines connected to the TFTs to supply video signals including a black-level signal and a pre-charge level signal in a horizontal blanking period; and a row drive circuit that scans gate lines connected to the TFTs to supply a drive signal, thereby writing the video signals to the pixels, wherein: the data-line drive circuit supplies the black level signal to all the data lines simultaneously in a first period of the horizontal blanking period, supplies the pre-charge level signal to all the data lines simultaneously in a second period of the horizontal blanking period, and successively supplies the image signals excluding the black level and the pre-charge level signals in a horizontal period after the horizontal blanking period; the row drive circuit includes a first row selection circuit and a second row selection circuit; the first row selection circuit scans the gate lines, writes the black-level signal to all the pixels in the scanned lines simultaneously and then writes the pre-charge level signal to all the pixels in the scanned lines simultaneously, and successively writes the image signals excluding the black-level and the pre-charge level signals to the pixels in the scanned lines; and the second row selection circuit starts to scan the gate lines with delay of a predetermined time relative to the first row selection circuit, scans the gate lines only in a time corresponding to the first period of the horizontal blanking period, and writes the black-level signal to all the pixels in the scanned lines simultaneously in the first period of the horizontal blanking period.