TOUCH SENSING DEVICE AND 2D SENSING INFORMATION UPDATE METHOD USED IN SAME

摘要

A touch sensing device and 2D sensing information update method used therein is disclosed. Before updating the 2D sensing information for use as a reference 2D sensing information, the processor determines the touch sensing panel is under an abnormal condition if any flatness index is smaller than a predetermined flatness index negative reference value or larger than a predetermined flatness index positive reference value, and will then keep measuring the capacitive coupling amount at each sensing point and getting respective flatness indexes, and will then update the 2D sensing information for use as a reference 2D sensing information when all the flatness indexes are in the range between the predetermined flatness index negative reference value and the predetermined flatness index positive reference value.

主权项

1. A touch sensing device 2D sensing information update method used in a touch sensing device comprising a touch sensing panel having arranged therein a plurality of driving lines extending along a first axis in a parallel manner and a plurality of sensing lines extending along a second axis in a parallel manner and crossed over the driving lines to form a plurality of sensing points, a driving and sensing circuit electrically connected with the driving lines and the sensing lines and adapted for measuring a capacitive coupling amount at each the sensing point, a processor electrically connected with the driving and sensing circuit, and a memory electrically connected to the processor, the touch sensing device 2D sensing information update method comprising the steps of:
(A01) the driving and sensing circuit measuring the capacitive coupling amount of each of all the sensing points, and then integrating each measured capacitive coupling amount and the respective coordinate data of all the sensing points into a 2D sensing information, and then processing the 2D sensing information to create multiple local 2D sensing information by integrating each predetermined number of adjacent the sensing points of all the sensing points and the respective capacitive coupling amounts; (A02) the processor computing from all the created the local 2D sensing information to get respective flatness indexes, and then integrating the flatness indexes and the respective coordinate data of the local 2D sensing information to create a flatness index information; (A03) the processor comparing each the flatness index of the flatness index information with a predetermined flatness index negative reference value and a predetermined flatness index positive reference value to check whether or not every flatness index is in the range between the predetermined flatness index negative reference value and the predetermined flatness index positive reference value, and then proceeding to step (204) if positive, or step (205) if negative; (A04) the processor determining that the touch sensing panel is under the normal condition, and then updating the 2D sensing information for use as a reference 2D sensing information; (A05) the processor determining that the touch sensing panel is under an abnormal condition, and then returning to step (A01).