Patent ID: 8810532
Filing Date: 2014-08-19
Classification: G06F

Abstract:
1. A touchscreen controller, comprising: one or more controlling components configured to control operations of a touchscreen or portions thereof by sensing a user input at the touchscreen and providing one or more outputs to a host processor indicative of the user input; and one or more testing components configured to test the touchscreen or elements thereof for faults; wherein the one or more testing components comprise a switch matrix configured to selectively couple and uncouple sense electronics to drive electronics; wherein the one or more controlling components comprise instructions for detecting changes in measurements obtained from electric signals received at the sense electronics and converting the detected changes to user input data and wherein the one or more testing components comprises a test capacitor integrated within the controller; wherein the switch matrix is further configured to selectively couple and uncouple the test capacitor to the sense electronics; wherein the switch matrix is further configured to selectively couple and uncouple the test capacitor to the drive electronics; and wherein the test capacitor is configured to be connected in parallel between a drive line in the drive electronics and a sense line in the sense electronics when corresponding drive line switches and sense line switches in the switch matrix are closed.