Patent ID: 8723813

Claim:
A flat panel display device comprising: a first face; a frame comprising a conductive face and a portion that is substantially perpendicular to the conductive face, the frame supporting the first face; a cushion member interposed between the first face and the conductive face and formed of a dielectric material, wherein a thickness of the cushion member varies depending on an externally applied pressure; a conductive film interposed between the first face and the cushion member; and a sensor unit electrically connected to the conductive face and the conductive film respectively, which calculates and senses a variation in capacitance of a capacitor comprising the conductive face, the cushion member, and the conductive film, wherein the cushion member is configured to contact the conductive face and the conductive film when the thickness of the cushion member is at a maximum, and wherein the cushion member is spaced from the portion of the frame that is substantially perpendicular to the conductive face.