SYSTEM AND METHOD FOR A TRANSCAPACITIVE PROXIMITY SENSING DEVICE

摘要

A processing system for a transcapacitive input device configured to detect input objects in a sensing region of the input device includes a transmitter module including transmitter circuitry, a receiver module, and a determination module. The transmitter module is configured to simultaneously transmit, using a plurality of transmitter electrodes, a plurality of transmitter signals according to a plurality of significantly non-orthogonal digital codes. At least two codes of the plurality of significantly non-orthogonal digital codes are significantly non-orthogonal. The receiver module is configured to receive, with a plurality of receiver electrodes, a plurality of resulting signals. Each resulting signal of the plurality of resulting signals comprises multiple effects corresponding to multiple transmitter signals of the plurality of transmitter signals. The determination module is configured to determine object information for input in the sensing region using the plurality of resulting signals.

主权项

1. A transcapacitive sensor device comprising:
a plurality of transmitter electrodes; a plurality of receiver electrodes capacitively coupled with the plurality of transmitter electrodes; and a processing system communicatively coupled to the plurality of transmitter electrodes and the plurality of receiver electrodes, the processing system configured to:
transmit, with the plurality of transmitter electrodes, a plurality of transmitter signals in accordance with a plurality of significantly non-orthogonal digital codes, wherein at least two codes of the plurality of significantly non-orthogonal digital codes are significantly non-orthogonal;receive, with the plurality of receiver electrodes, a plurality of resulting signals, each resulting signal of the plurality of resulting signals comprising multiple effects corresponding to multiple transmitter signals of the plurality of transmitter signals; anddetermine one or more positions for input near the pluralities of transmitter and receiver electrodes based on a comparison of the plurality of resulting signals with a family of expected signals by:
determining correlation amounts between the plurality of resulting signals and different members of the family of expected signals, anddetermining, based on the correlation amounts, a highest correlation or a set of correlations exceeding a threshold correlation amount.