Object positioning and detecting device and p method of capacitance type touchpad

Abstract

The invention relates to an object positioning and detecting method of a capacitance type touchpad, which is characterized by comprising the following steps of: (A) detecting the values of basic capacitances of a plurality of capacitance induction assemblies positioned on the capacitance type touchpad to find induction points; and (B) when a plurality of induction points are detected, detecting the values of side capacitances of the plurality of induction points to find the position of the object. An object positioning and detecting device and the object positioning and detecting method of the capacitance type touchpad have the advantages of distinguishing a real touch position and a ghost point of the object.

Description

technical field [0001] The invention relates to a capacitive touch panel, in particular to an object positioning detector and method for a capacitive touch panel. Background technique [0002] figure 1 It is a layout of a traditional two-dimensional capacitive touch panel 10 , which includes a plurality of capacitive sensing elements TX1 - TXN in the X-axis direction and a plurality of capacitive sensing elements TY1 - TYM in the Y-axis direction. The traditional object location method is to detect the basic capacitance value of each capacitive sensing component TX1-TXN and TY1-TYM, and the position where the maximum value is located is the position touched by the object. However, this method can only locate a single object, and cannot correctly locate the position of objects in multi-object applications. For example figure 2 As shown in the two-finger touch, two fingers touching the positions 20 and 22 at the same time will cause the basic capacitance value of the capac...

AI Technical Summary

Problems solved by technology

However, this method can only locate a single object, and cannot correctly locate the position of an object in a multi-object application

E.g figure 2 As shown in the two-finger touch, two fingers touching the positions 20 and 22 at the same time will cause the basic capacitance value of the capacitive sensing components TX1, TX2, TY1 and TY2 to change, so there will be four sensing points, except the fingers 20 and 22 are really Outside the positions (TX1, TY2) and (TX2, TY1), there will be two ghost points at positions (TX1, TY1) and (TX2, TY2) 24 and 26, which makes the capacitive touch panel 10 unable to correctly judge out real finger positions 20 and 22

[0003] Therefore, there are above-mentioned inconveniences and problems in the object positioning method of the known capacitive touch panel.

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