Electronic device with touch sensor and driving method thereof

摘要

An electronic device with a touch sensor comprises: a touch screen including touch sensors defined by Tx lines and Rx lines; a touch sensing circuit that supplies a drive signal to the Tx lines and senses a voltage change in the touch sensors to output sensing data; and a noise filtering unit that profiles the type of noise in the sensing data and compensates the sensing data so that the sensing data is near the maximum threshold or the minimum threshold, which is calculated based on a average value of the previous frame, or within the range between the maximum and minimum thresholds.

主权项

1. An electronic device with a touch sensor, the electronic device comprising:
a touch screen including touch sensors defined by Tx lines and Rx lines; a touch sensing circuit that supplies a drive signal to the Tx lines and senses a voltage change in the touch sensors to output sensing data; and a microcontroller executing program instructions stored in a memory, which is configured to perform noise filtering, which;
profile a type of noise in the sensing data in order to compensate the sensing data so that the compensated sensing data is near a maximum threshold or a minimum threshold which is calculated based on an average value of the sensing data of a previous frame, or within a range between the maximum and the minimum thresholds;compare the average value of the sensing data with a preset touch threshold, determine whether the sensing data is classified as touch or no touch, and set sensing data classified as touch being a first parameter and set sensing data classified as no touch being a second parameter.