Dynamic configuration of driven shield BGA balls of a capacitive sensor array
AssigneeMicrochip Touch Solutions Limited
InventorsRichard P. Collins, Tor Erik Leistad
Life of this patent
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Abstract
An apparatus may include a capacitive touch controller, a ball grid array package, firmware, and a driven shield driver circuitry. The ball grid array package may comprise a plurality of balls arranged in multiple concentric rings. The firmware may dynamically select a driven shield pattern based on a received aspect ratio input corresponding to a capacitive sensor array. The driven shield driver circuitry may activate the driven shield balls according to the dynamically selected driven shield pattern to electrically isolate drive balls from sense balls.
Claims26
An apparatus comprising:
- a capacitive touch controller;
- a ball grid array package comprising a plurality of balls arranged in multiple concentric rings;
- firmware to dynamically select a driven shield pattern based on a received aspect ratio input corresponding to a capacitive sensor array;
- and
- driven shield driver circuitry to activate the driven shield balls according to the dynamically selected driven shield pattern to electrically isolate drive balls from sense balls.
A method for dynamically configuring driven shield balls in a capacitive touch sensing system comprising:
- receiving, at a capacitive touch controller, an aspect ratio input corresponding to a capacitive sensor array coupled to the system;
- retrieving, from firmware, a driven shield pattern corresponding to the received aspect ratio input;
- configuring ball functions of a ball grid array package according to the retrieved driven shield pattern;
- and
- activating configured driven shield balls to electrically isolate drive balls from sense balls within the ball grid array.
Dependencies are inferred from the claim text.