Patent ID: 8803838
Filing Date: 2014-08-12
Classification: G06F

Abstract:
1. A display, comprising: an electro-optical material arranged between first and second planes facing each other; a first substrate arranged on the first plane and including a conductor that affords an electrical signal to the electro-optical material; a second substrate arranged on the second plane and including a first electrically conductive film that affords an electrical signal to the electro-optical material; a second electrically conductive film arranged outside an area sandwiched between a plane of the first substrate, on which the electro-optical material is not arranged, and a plane of the second substrate, on which the electro-optical material is not arranged; a current detection circuit that detects a current on the second electrically conductive film; a control circuit that, during a first time period the current is detected by the current detection circuit, applies a voltage with substantially the same amplitude and phase as that applied to the second electrically conductive film to one of the conductor extending from inside to outside of a viewing area and the first electrically conductive film, and sets the other in a floating state, or applies a voltage with substantially the same amplitude and phase as that applied to the second electrically conductive film to both the conductor extending from inside to outside of a viewing area and the first electrically conductive film; and a detecting unit that detects, based on the current detected by the current detection circuit, whether or not touch has been made by a finger or a pointer and where the touch has been made, wherein the floating means that an impedance value between the conductor extending from inside to outside of a viewing area and a voltage source connected thereto during the first time period is higher than that during a second time period other than the first time period, or an impedance value between the first electrically conductive film and a voltage source connected thereto during the first time period is higher than that during the second time period.