Touch sensing method, touch display apparatus and portable electronic device
A touch sensing method, a touch display apparatus and a portable electronic device thereof are provided. A system, a driving method and an architecture of a provided touch display panel are used for decreasing a resistance value between the ultrathin touch display panel (for example, a combination of an AMOLED display panel and a touch panel) or decreasing an influence of the resistance value, so as to decrease a chance of induction error of the touch event or induction misjudgement.
1. A touch sensing method, adapted to a touch display apparatus, wherein the touch display apparatus comprises a display panel and a touch panel, the display panel comprises an electrode layer, and the touch panel comprises a driving electrode layer, the touch sensing method comprising:
applying a voltage to the driving electrode layer;
setting a system parameter to determine whether an induction event is occurred, if not, obtaining a sensing voltage, and if yes, obtaining a parasitic capacitance voltage corresponding to the induction event; and
determining whether a value obtained by subtracting the sensing voltage from the parasitic capacitance voltage is smaller than a threshold voltage,
if yes, adjusting the system parameter, and determining whether a next induction event is occurred according to the updated system parameter,
if not, determining whether a variation of the sensing voltage is smaller than a threshold,
if not, reporting a touch point,
if yes, adjusting the system parameter, and determining whether a next induction event is occurred according to the updated system parameter.
2. The touch sensing method as claimed in claim 1 , wherein a method for adjusting the system parameter comprises prolonging an induction time.
3. The touch sensing method as claimed in claim 1 , wherein a method for adjusting the system parameter comprises adjusting a time of an initialization phase in a constant current charge-discharge circuit.
4. The touch sensing method as claimed in claim 3 , wherein a method for adjusting the time of the initialization phase comprises prolonging the time of the initialization phase.
5. The touch sensing method as claimed in claim 1 , wherein a method for adjusting the system parameter comprises adjusting a time required for charging or discharging.
6. The touch sensing method as claimed in claim 1 , wherein the touch panel is attached to a surface of the display panel in an on-cell manner.
7. A touch display apparatus, adapted to execute the touch sensing method as claimed in claim 1 , and the touch display apparatus comprising:
a display panel, comprising an electrode layer; and
a touch panel, comprising a driving electrode layer.