DRIVING METHOD FOR REDUCING DISPLAY INTERFERENCE IN IN-CELL MULTI-TOUCH PANEL AND SYSTEM USING THE SAME
First Claim
1. A driving method for reducing display interference in an in-cell multi-touch panel having a thin film transistor (TFT) layer, a sensing electrode layer, and a common voltage and touch driving layer, wherein the TFT layer having K gate lines and L source lines, the sensing electrode layer having M sensing lines, the common voltage and touch driving layer having N touch driving lines, where K, L, N, M are positive integers respectively, the driving method comprising:
- providing a display driving signal to the K gate lines and a display pixel signal to the L source lines so as to drive corresponding transistors and capacitors in a display frame for displaying an image; and
providing a touch driving signal to the N touch driving lines and receiving touch signals from the M sensing lines so as to detect touch point positions of an external object in a touch frame,wherein the touch frame and the display frame are synchronous and have the same time width and, sequence of providing the touch driving signal to the N touch driving lines are different for the touch frames respectively.
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Abstract
In a driving method for reducing display interference in in-cell multi-touch panel, a display driving signal is provided to K gate lines and a display image signal is provided to L source lines so as to drive corresponding transistors and capacitors in a display frame for displaying an image. The method also provides a touch driving signal to N touch driving lines and receives touch signals from M sensing lines to thereby detect one or more touch point positions of an external object in a touch frame based on the touch driving signal. In each touch frame, a sequence of providing the touch driving signal to N touch driving lines is different.
23 Citations
13 Claims
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1. A driving method for reducing display interference in an in-cell multi-touch panel having a thin film transistor (TFT) layer, a sensing electrode layer, and a common voltage and touch driving layer, wherein the TFT layer having K gate lines and L source lines, the sensing electrode layer having M sensing lines, the common voltage and touch driving layer having N touch driving lines, where K, L, N, M are positive integers respectively, the driving method comprising:
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providing a display driving signal to the K gate lines and a display pixel signal to the L source lines so as to drive corresponding transistors and capacitors in a display frame for displaying an image; and providing a touch driving signal to the N touch driving lines and receiving touch signals from the M sensing lines so as to detect touch point positions of an external object in a touch frame, wherein the touch frame and the display frame are synchronous and have the same time width and, sequence of providing the touch driving signal to the N touch driving lines are different for the touch frames respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for reducing display interference in in-cell multi-touch panel, comprising:
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a touch display panel, having a thin film transistor (TFT) layer, a sensing electrode layer, and a common voltage and touch driving layer, wherein the TFT layer having K gate lines and L source lines, the sensing electrode layer having M sensing lines to sense an approaching external object based on a touch driving signal, the common voltage and touch driving layer having N touch driving lines to receive a common voltage on displaying and to receive the touch driving signal on touch sensing, where K, L, M and N are positive integers respectively and K>
N; anda touch display control subsystem, having a touch controller and a display driver such that the display driver provides a display driving signal to the K gate lines and a display pixel signal to the L source lines for driving corresponding transistors and capacitors in the display frames respectively for displaying an image, and the touch controller provides a touch driving signal to the N touch driving lines and receives touch signals from the M sensing lines for detecting touch point positions of the approaching external object in a touch frame, wherein a sequence of providing the touch driving signal to the N touch driving lines is different in the touch frames respectively. - View Dependent Claims (10, 11, 12, 13)
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Specification