Patent ID: 11861089
Assignee: NOVATEK MICROELECTRONICS CORP.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 14:
15. A display device, comprising:
a touch display panel, comprising a plurality of gate lines, a plurality of data lines, and a plurality of sensor pads, wherein the sensor pads are grouped into active sensor pads and non-active sensor pads;
a gate control circuit, coupled to the gate lines of the touch display panel; and
a driving circuit, configured to drive the touch display panel and comprising:
a signal generating circuit, coupled to the gate lines of the touch display panel via the gate control circuit, and configured to modulate a plurality of voltage signals on a first driving signal and a second driving signal, and provide the modulated first driving signal and the modulated second driving signal to the gate control circuit to drive the gate lines during a sensing period; and
a sensor driving circuit, coupled to the sensor pads of the touch display panel, and configured to modulate the voltage signals on a third driving signal, and drive the sensor pads with the modulated third driving signal during the sensing period,
wherein the signal modulation circuit comprises:
a plurality of third modulation channels, configurable to be coupled to the active and non-active sensor pads, receiving the voltage signals, and modulating the voltage signals on the third driving signal,
wherein the third modulation channels coupled to the non-active sensor pads sequentially transmit the voltage signals to the touch display panel, and
wherein the third modulation channels coupled to the active sensor pads transmit sensing signals to a determination circuit.