Touch controller, touch display system and method for synchronizing touch display
AssigneeShenzhen Weitongbo Technology Co., Ltd.
InventorsYung-Fu Lin, Cheng-Chung Hsu
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Abstract
The present disclosure provides a touch controller, which includes, a monitoring circuit, configured to configured to detect a sensing signal generated via a touch sensor when a display panel is driven, and obtain at least one synchronizing signal according to the sensing signal; and a touch detecting circuit, configured to output a touch driving signal to the touch sensor according to the synchronizing signal. The touch controller provided by the present disclosure reduces the signal interference between the touch controller and the display driving circuit by using a touch sensor to obtain the synchronizing signal from the display panel.
Claims20
A touch controller, comprising:
- an analog front end circuit;
- an analog-to-digital converter, coupled to the analog front end circuit;
- a monitoring circuit, coupled to the analog-to-digital converter, wherein the monitoring circuit is configured to detect a sensing signal generated via a touch sensor, the analog front end circuit and the analog-to-digital converter sequentially when a display panel is driven, and obtain at least one synchronizing signal according to the sensing signal, and the sensing signal is related to a scan line of the display panel and unrelated to a data line of the display panel;
- and
- a touch detecting circuit, configured to output a touch driving signal to the touch sensor according to the synchronizing signal.
A touch display system, comprising:
- a display driving circuit, configured to drive a display panel;
- and
- a touch controller, wherein the touch controller is configured to detect a touch operation sensed by a touch sensor, and the touch controller includes:
- an analog front end circuit;
- an analog-to-digital converter, coupled to the analog front end circuit;
- a monitoring circuit, coupled to the analog-to-digital converter, wherein the monitoring circuit is configured to detect a sensing signal generated via the touch sensor, the analog front end circuit and the analog-to-digital converter sequentially when the display panel is driven by the display driving circuit, and obtain at least one synchronizing signal according to the sensing signal, and the sensing signal is related to a scan line of the display panel and unrelated to a data line of the display panel;
- and
- a touch detecting circuit, configured to output a touch driving signal to the touch sensor according to the synchronizing signal.
A method for synchronizing a touch display for use in a touch display system, wherein in touch display system includes a display panel, a display driving circuit, a touch sensor, a monitoring circuit and a touch controller, and the method comprises:
- using the display driving circuit to drive the display panel to generate a sensing signal, wherein the sensing signal is related to a scan line of the display panel and unrelated to a data line of the display panel;
- using the monitoring circuit to detect the sensing signal, and generate at least one synchronizing signal according to the sensing signal;
- and
- using the touch controller to output a touch driving signal to synchronize with the display panel according to the at least one synchronizing signal.
Dependencies are inferred from the claim text.