Patent ID: 9013413
Filing Date: 2015-04-21
Classification: G06F,G09G

Abstract:
1. A driving circuit of a liquid crystal display device comprising: a liquid crystal panel comprising a plurality of pixel regions defining a plurality of gate lines and a plurality of data lines, the plurality of pixel regions having first pixel cells and second pixel cells, each of the first pixel cells having only a pixel circuit for displaying data signal and each of the second pixel cells having both of the pixel circuit and a touch sensor circuit, wherein the first pixel cells are aligned in a matrix type corresponding to a full resolution, and the second pixel cells are aligned in a matrix type to have a resolution that is lower than the full resolution in a predetermined ratio; a panel driving unit driving the first and second pixel cells provided in the liquid crystal panel to display images, the panel driving unit converting and outputting touch sensing signals transmitted from the second pixel cells into digital signals; a sensing system calculating touch coordinates from the touch sensing signals detected therein by receiving the touch sensing signals, wherein the touch sensing signals are a sensed line with sharp angles, the sensing system performing a triangle midpoint extracting algorithm according to the touch coordinates and a connection direction of the touch coordinates at least one time to generate at least one compensation coordinate and outputting notation data generated from combining the touch coordinates and the compensation coordinates connected thereto, wherein the at least one compensation coordinate changes the sensed line formed by a user to a gentle curve; and a timing controller controlling the panel driving unit to display the notation data in the liquid crystal panel together with image data input from the outside, wherein the sensing system calculates coordinate values of the second pixel cells by receiving the touch sensing signals, the sensing system extendedly converting the calculated coordinate values of the second pixel cells to correspond to a ratio of an alignment resolution of the touch sensor circuit to the full resolution of the liquid crystal panel, and the sensing system compares and analyzes at least three coordinate values connected adjacent to the calculated coordinate values of the second pixel cells to extract coordinate values of regions having curves formed therein.