Open close detection for foldable displays

A method comprising:

• collecting raw data from a first edge of a first touchscreen portion and a second edge of a second touchscreen portion of a foldable touchscreen device over a plurality of frames, the first edge being positioned opposite from the second edge relative to a hinge connecting the first touchscreen portion and the second touchscreen portion of the foldable touchscreen device;
• generating a baseline capacitance based on an average of the collected raw data;
• calculating strength data based on a difference between a current raw data and the average of the collected raw data;
• integrating the strength data over a noise level;
• comparing the integrated strength data with an open/close threshold;
• and
• changing an open/close folding state from a previous open/close folding state when the integrated strength data is greater than or equal to the open/close threshold.

A device comprising:

• a first touchscreen portion;
• a second touchscreen portion;
• a hinge connecting the first touchscreen portion and the second touchscreen portion;
• and
• a touch controller configured to:
• simultaneously drive a plurality of drive channels to measure raw data;
• receive raw data from a first receive channel of the first touchscreen portion and a corresponding second receive channel of the second touchscreen portion, wherein the first receive channel and the second receive channel are perpendicular to the drive channels;
• determine a distance between the first receive channel and the second receive channel;
• generate a baseline capacitance based on the distance between the first receive channel and the second receive channel;
• filter the generated baseline capacitance;
• calculate strength data based on the filtered baseline capacitance and the raw data;
• and
• determine a folding state based on the calculated strength data.