Patent ID: 8643796
Filing Date: 2014-02-04
Classification: G02F,G09G

Abstract:
1. A liquid crystal display device having a plurality of pixels, comprising: a first substrate including: a second substrate opposing to the first substrate; a liquid crystal layer held between the first and second substrates and including liquid crystal molecules; and a detection circuit to detect change of electrostatic capacitance between the signal lines and the capacitance lines; wherein the capacitance lines include a common electrode arranged in common to the plurality of pixels, and the liquid crystal molecules are switched mainly using a lateral electric field between the common electrode and the pixel electrode; and the detection circuit writes a detection signal into the plurality of capacitance lines simultaneously by grouping the capacitance lines of adjacent rows of pixels during a detection period successive to an image signal write-in period to write the image signal into the pixel electrode, and thereby detects the change of the electrostatic capacitance between the signal lines and the capacitance lines.