Patent ID: 8487893
Filing Date: 2013-07-16
Classification: G06F,H03G

Abstract:
1. A capacitive touchscreen or touch panel system, comprising: a touchscreen comprising a first plurality of electrically conductive drive electrodes arranged in rows or columns, and a second plurality of electrically conductive sense electrodes arranged in rows or columns arranged at an angle with respect to the rows or columns of the first plurality of electrodes, mutual capacitances existing between the first and second pluralities of electrodes at locations where the first and second pluralities of electrodes intersect to form individual cells, the mutual capacitances changing in the presence of one or more fingers of a user or touch devices brought into proximity thereto; drive circuitry operably connected to the first plurality of drive electrodes; sense circuitry operably connected to the second plurality of sense electrodes and configured to sense input signals corresponding to the individual cells therefrom, and a controller operably connected to the first plurality of drive electrodes and the second plurality of sense electrodes, the controller comprising a central processing unit (CPU) and automatic level control (ALC) circuitry comprising: wherein the CPU is configured to calculate touch position data based on the final output signals corresponding to the positions of the one or more fingers of the user or touch devices.