Differential Touch Sensing Circuit for Sensitivity and Response

The patent segments the measurement process by dividing the measurement period into multiple sub-periods and using multiple electrodes in sequence. Instead of using faster electronics to capture all signals simultaneously, the system uses multiple slower measurement cycles to achieve the same sensitivity, thereby reducing the cost and size requirements of the electronics.

The patent employs periodic action by measuring capacitance values at multiple time points (first measurement period, second measurement period, third measurement period) and using these periodic samples to calculate the final capacitance. This allows the system to achieve high sensitivity through multiple measurements rather than requiring expensive high-speed electronics for a single measurement.

The patent segments the total measurement time into multiple shorter measurement periods (first, second, and third measurement periods) distributed across different electrodes. This allows the system to maintain high sensitivity through multiple measurements while reducing the time required for each individual measurement cycle, thereby improving responsiveness.

The patent ensures continuity of useful action by overlapping the measurement periods across different electrodes. While one electrode is being measured during the first measurement period, other electrodes are prepared for their measurement periods, and the third measurement period begins before the first measurement period ends. This continuous progression through multiple measurement cycles achieves high sensitivity without significant delays in responsiveness.