Touch sensitive device, system and method thereof
View Patent ↗A touch sensitive detecting method, applicable to a touch panel or screen, comprises: setting a sensing electrode to floating; after the sensing electrode is set to floating, setting at least one non-measuring sensing electrode to a sensing high voltage; measuring the voltage of the sensing electrode; setting the sensing electrode to a ground voltage and stopping measurement; and determining whether an externally conducted object is approximating or touching the touch panel or screen nearby the sensing electrode by comparing a difference between a threshold voltage and the measured voltage of the sensing electrode.
1. A touch sensitive detecting method, applicable to a touch panel or screen, comprising:
setting a sensing electrode to floating;
setting a non-measuring sensing electrode to a sensing high voltage after the sensing electrode is set to floating;
measuring the voltage of the sensing electrode;
setting the sensing electrode to a ground voltage and stopping measurement; and
determining whether an externally conducted object is approximating or touching the touch panel or screen nearby the sensing electrode by comparing a difference between a threshold voltage and the measured voltage of the sensing electrode; and
determining that there is conducted liquid on the touch panel or screen nearby the sensing electrode when the measured voltage of the sensing electrode is higher than the threshold voltage.
2. The method according to claim 1 , further comprising: after the sensing electrode is set to floating, setting a driving electrode to a driving voltage.
3. The method according to claim 2 , wherein the driving voltage is higher than the dummy high voltage.
4. The method according to claim 2 , further comprising: before the sensing electrode is set to floating, setting the driving electrode to a voltage lower than the sensing high voltage and the driving voltage.
5. The method according to claim 2 , further comprising: setting at least one dummy pad nearby the sensing electrode to a voltage lower than the sensing high voltage and the driving voltage.
6. The method according to claim 1 , wherein determining the externally conducted object is approximating or touching the touch panel or screen nearby the sensing electrode if the measured voltage of the sensing electrode is lower than the threshold voltage.
7. A touch sensitive device, applicable to a touch panel or screen, comprising:
a sensing electrode;
at least one non-measuring sensing electrode; and
a processing circuit, electrically connected to the sensing electrode, the at least one non-measuring sensing electrode and the touch panel or screen;
wherein the processing circuit sets the sensing electrode to floating; after the sensing electrode is set to floating, the processing circuit sets the at least one non-measuring sensing electrode to a sensing high voltage; the processing circuit measures the voltage of the sensing electrode; the processing circuit sets the sensing electrode to a ground voltage and stopping measurement; the processing circuit determines whether an externally conducted object is approximating or touching the touch panel or screen nearby the sensing electrode by comparing a difference between a threshold voltage and the measured voltage of the sensing electrode; and the processing circuit determines that there is conducted liquid on the touch panel or screen nearby the sensing electrode when the measured voltage of the sensing electrode is higher than the threshold voltage.
8. The device according to claim 7 , wherein the processing circuit further sets a driving electrode to a driving voltage after the sensing electrode is set to floating.
9. The device according to claim 8 , wherein the driving voltage is higher than the dummy high voltage.
10. The device according to claim 8 , wherein the processing circuit further sets the driving electrode to a voltage lower than the sensing high voltage and the driving voltage before the sensing electrode is set to floating.
11. The device according to claim 8 , wherein the processing circuit further sets at least one dummy pad nearby the sensing electrode to a voltage lower than the sensing high voltage and the driving voltage.
12. The device according to claim 7 , wherein the externally conducted object is determined approximating or touching the touch panel or screen nearby the sensing electrode if the measured voltage of the sensing electrode is lower than the threshold voltage.
13. The device according to claim 7 , wherein conducted liquid is determined on the touch panel or screen nearby the sensing electrode if the measured voltage of the sensing electrode is higher than the threshold voltage.
14. A touch sensitive system, comprising:
a touch panel or screen; and,
a processing circuit, electrically connected to the touch panel or screen;
wherein the processing circuit sets a sensing electrode to floating;
wherein after the sensing electrode is set to floating, the processing circuit sets at least one non-measuring sensing electrode to a sensing high voltage;
wherein the processing circuit measures the voltage of the sensing electrode, and the processing circuit sets the sensing electrode to a ground voltage and stopping measurement; and
wherein the processing circuit determines whether an externally conducted object is approximating or touching the touch panel or screen nearby the sensing electrode by comparing a difference between a threshold voltage and the measured voltage of the sensing electrode, and the processing circuit determines that there is conducted liquid on the touch panel or screen nearby the sensing electrode when the measured voltage of the sensing electrode is higher than the threshold voltage.