Patent ID: 9019196
Filing Date: 2015-04-28
Classification: G02F,G06F,G09G

Abstract:
1. A liquid crystal display device, comprising: a first substrate; a second substrate having detection electrodes of a touch panel; a liquid crystal held between the first substrate and the second substrate; a plurality of pixels arrayed in a matrix, each having a pixel electrode and a counter electrode divided into a plurality of blocks; and a driver circuit that applies a counter voltage, a scanning voltage, a video voltage and a touch panel scanning voltage to the divided counter electrodes of the respective blocks, wherein the divided counter electrodes of the respective blocks are commonly provided on the respective pixels of a plurality of continuous display lines, wherein the divided counter electrodes of the respective blocks double as scanning electrodes of the touch panel, wherein, in respective horizontal scanning periods, the driver circuit outputs the scanning voltage, the video voltage and the touch panel scanning voltage, wherein, if N is an integer of 2 or larger, the driver circuit sequentially applies the touch panel scanning voltage to the divided counter electrodes of the respective blocks in N horizontal scanning periods while the scanning voltage and the video voltage are not varied, wherein, in N horizontal scanning periods, the driver circuit outputs the scanning voltage periodically, and wherein a drive frequency of the touch panel scanning voltage which is applied to the divided counter electrodes of the respective blocks in the respective periods of the N horizontal scanning periods is different in each of the N horizontal scanning periods.