CPC G06F 3/04184 (2019.05) [G06F 3/0446 (2019.05)] | 21 Claims |
1. A method for operating a touch sensing panel, the method comprising:
determining, by a touchscreen controller, a first plurality of excitation signals in accordance with a first plurality of codes, wherein a sum of the first plurality of codes is a sequence of numbers having a same absolute value and signs alternating between adjacent numbers in the sequence of numbers, wherein the first plurality of codes are vectors of length L, L being a positive integer, wherein elements of the vectors are either a positive value “X” or a negative value “−X”;
transmitting, by the touchscreen controller, each of the first plurality of excitation signals to a respective transmitting (TX) touch sensor of the touch sensing panel simultaneously during a first time frame, wherein L divided by a period of the first time frame is larger than a flicker fusion threshold; and
determining, by the touchscreen controller, touch strengths in accordance with a first plurality of output signals received by a plurality of receiving (RX) touch sensors of the touch sensing panel during the first time frame.
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