TOUCH DISPLAY APPARATUS AND METHOD FOR DETECTING TOUCH POINT THEREOF

摘要

A touch display apparatus and a method for detecting a touch point thereof are provided. The method for detecting a touch point includes the following steps. In a first touch detecting period, a first driving signal is provided sequentially to a plurality of first touch electrodes so that a plurality of first detecting signals are received from a plurality of second touch electrodes, and a first touch reference point is determined accordingly. In a second touch detecting period, when the first touch reference point is detected, capacitance variations of the first touch electrodes and the second touch electrodes are detected to obtain a plurality of second detecting signals and a plurality of third detecting signals, and a first real touch point is determined accordingly.

主权项

1. A touch display apparatus, comprising:
a display apparatus; and a touch apparatus, comprising:
a plurality of first touch electrodes and a plurality of second touch electrodes, interlaced with each other to form a touch area, wherein the touch area overlaps a display area of the display apparatus;a first touch driving circuit coupled to the first touch electrodes; anda touch detecting circuit coupled to the first touch electrodes, the second touch electrodes and the first touch driving circuit, and controlling the first touch driving circuit; wherein in a first touch detecting period, the touch detecting circuit provides a first driving signal sequentially to the first touch electrodes via the first touch driving circuit in order to receive a plurality of first detecting signals from the second touch electrodes, and the touch detecting circuit determines at least one first touch reference point according to timing of provision of the first driving signal and the first detecting signals, in a second touch detecting period, when the touch detecting circuit detects the at least one first touch reference point, the touch detecting circuit detects capacitance variations of the first touch electrodes and the second touch electrodes in order to obtain a plurality of second detecting signals and a plurality of third detecting signals, so as to determine at least one first real touch point according to the second detecting signals, the third detecting signals and the at least one first touch reference point.