Patent ID: 8907917
Filing Date: 2014-12-09
Classification: G06F

Abstract:
1. A liquid crystal display device comprising: a first substrate and a second substrate formed to face each other; a plurality of gate lines and data lines formed to cross each other on the first substrate to define pixel regions; a pixel transistor formed on each of crossed portions of the gate lines and data lines data and a pixel electrode formed at each of the pixel regions; a common electrode formed on an entire surface of the second substrate; a liquid crystal layer filled between the first and second substrates; a liquid crystal capacitor formed between the pixel electrode and the common electrode; a storage line formed on the first substrate; a switching line formed in parallel to the gate line; a read out line parallel to the data line; a first storage capacitor formed between the storage line and the pixel transistor; a second storage capacitor and a sensing capacitor formed in series between the switching line and the common electrode; a switching transistor having a gate electrode connected to a contact point of the second storage capacitor and the sensing capacitor, and a drain electrode connected to the read out line; and a resistor formed between the switching line and the gate electrode of the switching transistor in parallel to the second storage capacitor, wherein a time constant is defined with a resistance value of the resistor and capacitance values of the second storage capacitor, the sensing capacitor and the switching transistor, the time constant is smaller than one frame time period and greater than an on-time period of a high signal applied to the switching line.