Patent ID: 9601067
Date: 2017-03-21
CPC Classifications: G06F,G09G

Claim:
1. An in-cell multi-touch display panel system, comprising: a touch liquid crystal display (LCD) panel, including: a thin film transistor (TFT) layer, having K gate driving lines in a second direction, L source driving lines in a first direction, and a plurality of thin film transistors, each being arranged at an intersection of one gate driving line and one source driving line and connected to the intersected gate driving line and source driving line where K and L are each a positive integer; a conductive electrode layer, having M first conduct lines in the first direction for detecting an external object based on a touch driving signal, where M is a positive integer; and a common-voltage and touch-driving layer, having N second conduct lines in the second direction, for receiving a common voltage signal in the display operation and receiving a touch-driving signal in touch detection, where N is a positive integer and K>N, wherein the conductive electrode layer and the common-voltage and touch-driving layer are on the same side of the TFT layer, and the N second conduct lines are intersected with the M first conduct lines; and a touch display control subsystem, connected to the TFT layer, the conductive electrode layer, and the common-voltage and touch-driving layer, for providing display driving signal sequentially to the K gate driving lines and turn on the corresponding thin film transistors, providing display pixel signal to the L source driving lines thereby performing a display operation, and providing the touch driving signal to the N second conduct lines and sampling touch voltages from the M first conduct lines to detect if there is the external object or not; wherein the K gate driving lines are divided into N groups corresponding to the N second conduct lines, respectively, and when one group of gate driving lines has the display driving signal, the second conduct line corresponding to the group of gate driving lines is connected to the common voltage, and wherein the touch display control subsystem does not provide the touch driving signal to the i-th second conduct line when the display driving signal is provided to one group of gate driving lines corresponding to the i-th second conduct line, wherein i is a positive integer and 2≦i≦N, and provides the touch driving signal to the i-th second conduct line in a display period when the display driving signal is not provided to one group of gate driving lines corresponding to the i-th second conduct line; wherein the touch display control subsystem provides the touch driving signal to the (i−1)-th second conduct line and the display driving signal to the i-th group of gate driving lines corresponding to the i-th second conduct line at the same time.