HIGH-SENSITIVITY SELF-CAPACITANCE IN-CELL TOUCH DISPLAY PANEL DEVICE

摘要

A high-sensitivity self-capacitance in-cell touch display panel device includes a sensing electrode layer having plural sensing electrodes, a display control circuit, a touch sensing control circuit, and an amplifier with gain greater than zero. The display control circuit is powered by a first power source and connected to a first ground. The touch sensing control circuit is coupled to the sensing electrodes for performing a touch sensing. The touch sensing control circuit is powered by a second power source and connected to a second ground, wherein the first power source and the first ground are different from the second power source and the second ground. The amplifier is connected to the touch sensing control circuit and a common voltage layer. The touch sensing control circuit applies a sensing signal sensed by at least one sensing electrode to the amplifier for being amplified and applied to the common voltage layer.

主权项

1. A high-sensitivity self-capacitance in-cell touch display panel device, comprising:
a first substrate; a second substrate parallel to the first substrate; a display material layer configured between the first substrate and the second substrate; a common voltage layer disposed between the first substrate and the display material layer; a sensing electrode layer disposed between the first substrate and the common voltage layer, and having a plurality of sensing electrodes; a plurality of sensing electrode selection switches, each corresponding to at least one sensing electrode; a display control circuit for controlling the high-sensitivity self-capacitance in-cell touch display panel device to display image, wherein the display control circuit is powered by a first power source and is connected to a first ground; a touch sensing control circuit connected to the plurality of sensing electrode selection switches for controlling the at least one sensing electrode corresponding to each sensing electrode selection switch so as to perform a touch sensing, wherein the touch sensing control circuit is powered by a second power source and is connected to a second ground; and an amplifier with gain greater than zero connected to the touch sensing control circuit and the common voltage layer, wherein the first power source and the first ground are different from the second power source and the second ground and, in detection, the touch sensing control circuit applies a sensing signal sensed by the at least one sensing electrode corresponding to a sensing electrode selection switch to the amplifier with gain greater than zero for being amplified so as to generate an in-phase copied sensing signal that is applied to the common voltage layer, thereby reducing the capacitance effect between the common voltage layer and the at least one sensing electrode corresponding to the sensing electrode selection switch.