Method for Scanning Projective Capacitive Touch Panel, Storage Medium and Apparatus for Scanning Projective Capacitive Touch Panel
First Claim
1. A method for scanning a projective capacitive touch panel, comprising:
- A- scanning each first-axis electrode arranged along a first-axis and each second-axis electrode arranged along a second-axis by a controller, then obtaining the first-axis electrode and the second-axis electrode whose self capacitance changes;
B- detecting mutual capacitance at each intersection between the first-axis electrode and the second-axis electrode which electrodes'"'"' self capacitance changes to determine whether the mutual capacitance changes, then area where the mutual capacitance changes being taken as a touched area.
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Abstract
The present invention relates to a method for scanning a projective capacitive touch panel including: A. scanning each first-axis electrode arranged along a first-axis and each second-axis electrode arranged along a second-axis, then obtaining the first-axis electrode and the second-axis electrode whose self capacitance changes; B. detecting the mutual capacitance at each intersection between the first-axis electrode and the second-axis electrode whose self capacitance changes to determine whether the mutual capacitance changes, then the area where the mutual capacitance changes being taken as a touched area. The present invention also relates to a storage medium storing instructions of implementing above method and an apparatus that implements the above method.
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Citations
15 Claims
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1. A method for scanning a projective capacitive touch panel, comprising:
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A- scanning each first-axis electrode arranged along a first-axis and each second-axis electrode arranged along a second-axis by a controller, then obtaining the first-axis electrode and the second-axis electrode whose self capacitance changes; B- detecting mutual capacitance at each intersection between the first-axis electrode and the second-axis electrode which electrodes'"'"' self capacitance changes to determine whether the mutual capacitance changes, then area where the mutual capacitance changes being taken as a touched area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A storage medium for storing a set of instructions to perform a method for scanning a projective capacitive touch panel, the method comprising:
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A- scanning each first-axis electrode arranged along a first-axis and each second-axis electrode arranged along a second-axis, then obtaining the first-axis electrode and the second-axis electrode whose self capacitance changes; B- detecting mutual capacitance at each intersection between the first-axis electrode and the second-axis electrode whose self capacitance changes to determine whether the mutual capacitance changes, then area where the mutual capacitance changes being taken as a touched area.
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15. A system for scanning a projective capacitive touch panel, comprising:
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a scanning module for detecting self capacitances of first-axis electrodes and second-axis electrodes; a controlling module for determining whether the self capacitances change and controlling the scanning module to detect a mutual capacitance at an intersection between the first-axis electrode and the second-axis electrode if the self capacitance of the first-axis electrode and the second-axis electrode changes and determining a touched area defined by the intersection having a changed mutual capacitance.
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Specification