Patent ID: 8766946

Claim:
A sensing circuit, comprising: a first substrate; a second substrate facing the first substrate; a layer of dielectric material held between the first substrate and the second substrate; a pixel including a first electrode and a second electrode, the first electrode being disposed between the dielectric material and the first substrate, the second electrode being disposed between the dielectric material and the first substrate, wherein the first electrode is a common electrode of a pixel circuit and the second electrode is a pixel electrode of the pixel circuit; a first sensing electrode, wherein the first sensing electrode and the common electrode of the pixel circuit are formed in a same first layer; a second sensing electrode, wherein the second sensing electrode and the pixel electrode of the pixel circuit are formed in a same second layer; and an electrostatic capacitance detection unit configured to produce a detection signal having an amplitude based on a capacitance formed between the first sensing electrode and the second sensing electrode through the dielectric material.