Patent ID: 8427413
Filing Date: 2013-04-23
Classification: G02F,G09G

Abstract:
1. An active-matrix liquid crystal display device, including scanning signal lines extending in a row direction, data signal lines extending in a column direction, and pixels provided so as to respectively correspond to intersections of the scanning signal lines and the data signal lines, the liquid crystal display device comprising: a scanning signal driving section for sequentially applying gate-on pulses on the scanning signal lines, each of the gate-on pulses causing a scanning signal line to be in a selected state; and a data signal driving section for applying data signals on the data signal lines such that a polarity of a data signal is inverted with respect to plural number of horizontal periods in one frame period, the scanning signal driving section is configured to apply the gate-on pulses such that a second period is longer than a first period, the first period and the second period being defined in such a manner that among gate-on pulses applied before a moment of polarity inversion of a data signal, when a last end of a gate-on pulse nearest to the moment of the polarity inversion is earlier than an end time of a horizontal period during which the gate-on pulse is applied, the first period starts at the last end of the gate-on pulse and ends at the end time of the horizontal period, and the second period starts at the moment of the polarity inversion and ends at a moment of an application start of a gate-on pulse nearest to the moment of the polarity inversion among gate-on pulses applied after the polarity inversion wherein the scanning signal lines are divided into one or more blocks, and scanning signal lines included in each block are divided into plural groups, the scanning signal driving section is configured to sequentially scan blocks of scanning signal lines and sequentially scan groups of scanning signal lines in each block such that the scanning signal lines in each block are interlace-scanned, and the data signal driving section is configured to apply data signals on the data signal lines such that a polarity of a data signal is inverted at a moment of switching groups of scanning signal lines to be scanned, the number of the blocks of scanning signal lines is two or more, scanning signal lines included in each block are divided into a first group including odd scanning signal lines and a second group including even scanning signal lines, the scanning signal driving section is configured to scans such that when a secondly scanned group of scanning signal lines in a firstly scanned block of adjacent two blocks of scanning signal lines is the first group, a firstly scanned group of scanning signal lines in a secondly scanned block of the adjacent two blocks is the first group, and when a secondly scanned group of scanning signal lines in a firstly scanned block of adjacent two blocks of scanning signal lines is the second group, a firstly scanned group of scanning signal lines in a secondly scanned block of the adjacent two blocks is the second group, and the data signal driving section is configured to inverts a polarity of a data signal when groups of scanning signal lines to be scanned in each block are switched, and not invert a polarity of a data signal when adjacent two blocks of scanning signal lines to be scanned are switched.