Patent ID: 8536884

Claim:
A device for correcting position error, comprising: a sensor including a plurality of conductive stripes constituting a plurality of intersecting regions, wherein a pair of depressed conductive stripes intersected in an intersecting region form a contact point due to electrical contact so as to define a depressed intersecting region; a driver for providing a high potential and a low potential; a detector for detecting a signal of at least one conductive stripe; a selector for operatively coupling the conductive stripes with the driver and the detector; a controller for controlling the driver, the detector and the selector to perform at least the following operations: detectring a non-depressed potential at one end of each conductive stripe; detectring a depressed potential at the end of each conductive stripe; and determining a proportion of error at the contact point on each depressed conductive stripe based on the non-depressed potential and the depressed potential; and controlling the driver, the detector, and the selector to perform the following operation of determining the pair of the depressed conductive stripes by determining whether there is a conducting path between the conductive stripes in each intersecting region, wherein the detection of the non-depressed potential is performed before the determination of the depressed conductive stripe.