Patent ID: 7081765
Filing Date: 2006-07-25
Classification: G06K

Abstract:
1. An electrostatic capacitance detection device that reads surface contours of a target object through detection of electrostatic capacitance which changes according to a distance from the target object, comprising: output lines and power-supply lines; M number of row lines and N number of column lines arranged in a matrix of M rows and N columns; and an electrostatic capacitance detecting element formed at an intersection of a row line and a column line, the electrostatic capacitance detecting element including a signal detection element, a signal amplifying element, a column selecting element, and a row selecting element, the signal detection element having a capacity detecting electrode, a capacity detecting dielectric layer, and a reference capacitor, the reference capacitor being constituted by a reference capacitor first electrode, a reference capacitor dielectric layer, and a reference capacitor second electrode, the signal amplifying element, the column selecting element, and the row selecting element being coupled in series and arranged between the output line and the power-supply line, and the reference capacitor first electrode and the column line being electrically coupled.