Patent ID: 7839392
Filing Date: 2010-11-23
Classification: G06F

Abstract:
1. A sensing circuit for sensing an externally provided pressure on a panel including a first substrate, a second substrate corresponding to the first substrate to have an opposite electrode, and an insulating layer interposed between the first and second substrates, the sensing circuit comprising: a sensing capacitor including a sensing electrode on the first substrate, the insulating layer and the opposite electrode, the sensing electrode being connected to a first node; a first switching element comprising: a second switching element outputting a second current, the second switching element comprising: a third switching element outputting a third current, the third switching element comprising: wherein a capacitance of the sensing capacitor is increased by the externally provided pressure, and a voltage level of the first node is decreased by the increased capacitance of the sensing capacitor, and wherein an amount of the third current is decreased by the decreased voltage level of the first node.