Method and driving apparatus for identifying sensing value of touch panel

A driving apparatus of a touch panel, comprising:

• a selector, connected to a plurality of electrodes of the touch panel, wherein an electrode Si denotes an ith electrode of the electrodes of the touch panel;
• a sensing circuit, connected to the selector, wherein the sensing circuit senses the electrodes one by one through a switching operation of the selector, and obtains raw data and baseline data of each electrode Si;
• and
• a controller, connected to the sensing circuit, wherein the controller calculates a sensing value of the electrode Si in accordance with the raw data and the baseline data of the electrode Si;
• when sensing values of all the electrodes Si are smaller than a threshold value, the controller updates the baseline data of the electrode Si in accordance with the raw data of the electrode Si;
• and when a sensing value of any one electrode Si of the electrodes is larger than the threshold value, the controller suspends updating the baseline data of the electrodes.

A method for identifying a sensing value of a touch panel, wherein two opposite side edges of the touch panel along a first axial direction are a first side and a second side respectively, the touch panel comprises a plurality of electrode pairs, the electrode pairs respectively comprise a first electrode and a second electrode, the first electrodes are disposed at the first side of the touch panel, and the second electrodes are disposed at the second side of the touch panel, the method comprising:

• sensing the electrode pairs of the touch panel to obtain raw data and baseline data of each electrode, wherein an electrode Si denotes one of the first electrodes and the second electrodes of the touch panel;
• calculating a sensing value of the electrode Si in accordance with the raw data and the baseline data of the electrode Si;
• when a sum of a sensing value of a first electrode and a sensing value of a second electrode of the electrode pairs is smaller than a threshold value, updating the baseline data of the electrode Si in accordance with the raw data of the electrode Si;
• and
• when the sum of the sensing value of the first electrode and the sensing value of the second electrode of any one of the electrode pairs is larger than the threshold value, suspending updating the baseline data of the electrode pairs.