Patent ID: 8754857

Claim:
A display apparatus comprising: a display block having a plurality of picture pixel elements; a switch arranged inside said display block and configured to be closed by an external pressure; a detection block configured to detect whether said switch is closed based on a comparison between a signal supplied from said switch and a reference signal; a precharge block configured to give a precharge potential to a wire conducting with one of electrodes of said switch before detection is executed in said detection block; and a detection block potential supply block configured to give a predetermined potential to a wire conducting with the other electrode of said switch before detection is executed in said detection block, and further wherein the switch is selectively connected to a pixel electrode signal line, and wherein the switch is selectively connected to the pixel electrode signal line via a transistor that is controlled with a signal from a gate signal line and the gate signal line also controls application of a data signal to a corresponding picture element.