| CPC G06F 3/04184 (2019.05) [G06F 3/04164 (2019.05); G09G 3/2096 (2013.01); G09G 2330/06 (2013.01)] | 6 Claims |
|
1. A driver circuit, configured to drive a display panel to perform a display function and a touch function, the driver circuit comprising:
a plurality of pads, coupled to the display panel and grouped into several pad groups, wherein a synchronization driving signal is applied to the pad groups in a touch sensing phase, and the synchronization driving signal has a first level; and
a switch circuit, coupled to the pads and configured to receive a common signal and a system voltage signal, and output the common signal and the system voltage signal to the pad groups in a time division manner, wherein the common signal has a second level, and the system voltage signal has a third level,
wherein voltage levels of the pad groups are changed from the second level to the first level in different times, and the second level is smaller than the first level,
wherein the switch circuit comprises:
a plurality of first switches, configured to receive the common signals, and output the common signals to the pad groups when the first switches are conducted; and
a plurality of second switches, configured to receive the system voltage signals, and output the system voltage signals to the pad groups when the second switches are conducted,
wherein when the display panel enters a touch sensing phase, the first switches are sequentially conducted first, and then the second switches are sequentially conducted after the first switches are sequentially conducted; and
when the display panel prepares to leave the touch sensing phase, the second switches are sequentially conducted first, and then the first switches are sequentially conducted after the second switches are sequentially conducted.
|