Patent ID: 8350823
Filing Date: 2013-01-08
Classification: G06F

Abstract:
1. A coordinate detection device comprising: a conductor for locating a point of contact; multiple terminals that are connected to the conductor at mutually different points; a signal output section, which includes a charge storage section to store electrical charge there and which outputs a signal with a voltage value representing the quantity of charge stored in the charge storage section; a setting section for setting a voltage for the charge storage section to a predetermined value; a first switching section for selectively connecting or disconnecting a particular one of the terminals to/from not only the charge storage section but also a first power supply; a control section for controlling the operation of the first switching section, wherein the control section turns the first switching section to change states from a first state in which the particular terminal is connected to the charge storage section but disconnected from the first power supply into a second state in which the particular terminal is connected to the first power supply but disconnected from the charge storage section, and vice versa, a predetermined number of times, wherein after the states have been changed the predetermined number of times, the signal output section outputs the signal, and wherein the control section changes the numbers of times of state transition between the first and second states according to the voltage value of the signal; and a compensator for supplying current, which compensates for current flowing through a parasitic capacitance between the conductor and the first switching section, to the particular terminal, wherein the compensator includes: