Patent ID: 8553013
Filing Date: 2013-10-08
Classification: G02F,G06F,H01L

Abstract:
1. A liquid crystal display comprising: a liquid crystal layer interposed between upper and lower substrates; a plurality of pixels, respectively formed in pixel regions of the lower substrate, each of the plurality of pixels including a pixel electrode and a common electrode applying a horizontal electric field to the liquid crystal layer, a pixel thin film transistor connected with a gate line and a data line to drive the pixel electrode, and a common thin film transistor connected with the gate line and a common line to drive the common electrode; touch sensors, each forming a sensing capacitor between an object touching the upper substrate and the common electrode to sense touch and then to output a sensing signal; sensor power lines to supply sensing driving voltage to the respective touch sensors; readout lines to output the sensing signal from the respective touch sensors; and sensor gate lines formed parallel with gate lines, wherein each of the touch sensors includes: the common electrode formed in plural pixels; a first sensor thin film transistor to charge the common electrode with the sensing driving voltage from the corresponding sensor power line in response to control of the previous sensor gate line; and a second sensor thin film transistor to output the sensing signal from the common electrode to the corresponding readout line in response to control of the current sensor gate line.