Method for positioning capacitance sensor

Abstract

The invention discloses a method for positioning a capacitance sensor. The method comprises the following steps: firstly, gradually and sequentially scanning adjacent positive touch control electrodes or adjacent negative touch control electrodes, and acquiring a capacitance difference of the adjacent positive touch control electrodes or the adjacent negative touch control electrodes to serve as a first group of data; then, gradually and sequentially scanning adjacent electrode groups, and acquiring the capacitance difference of the adjacent electrode groups to serve as a second group of data; and finally, calculating the coordinates of a position X and the coordinates of a position Y by using the first group of data and the second group of data. According to the method, the coordinates of a touch position can be judged just by scanning twice to acquire two groups of data, so that number of scanning times is reduced, scanning time is saved, and the coordinates of the touch position can be judged simply and rapidly.

Description

technical field [0001] The invention relates to a sensor positioning method, in particular to a capacitance sensor positioning method. Background technique [0002] A capacitive sensor uses the principle of capacitance to transmit signals in the X direction and Y direction, which can be an ITO (indium tin oxide) layer, PCB board, keyboard or touch screen, etc., and is usually actuated by a human finger or stylus. A capacitive sensor is usually arranged with multiple rows or columns of touch electrodes, and a finger or a stylus will change the capacitance of the touch electrodes. By scanning each touch electrode, the change amount of each touch electrode is detected. Measure the specific position where the finger or stylus touches the touch screen. The existing scanning method requires multiple scans when determining the X-axis coordinates. When determining the Y-axis coordinates, due to the different configuration of the touch electrodes, another scan is required, and when ...

AI Technical Summary

Problems solved by technology

The existing scanning method requires multiple scans when determining the X-axis coordinates. When determining the Y-axis coordinates, due to the different configuration of the touch electrodes, another scan is required, and when calculating the X-axis coordinates, the Y-axis is not scanned. The results are effectively utilized, the number of scans is high, and the scan time is long

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