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 thereby being integrated as a touch display frame in which a first touch driving signal is provided substantially close to a first display driving signal and a last touch driving signal is substantially close to a last display driving signal, and sequence of providing the touch driving signal to the N touch driving lines in a J-th touch display frame is different from that in a (J+1)-th touch display frame;
wherein, in the J-th touch display frame, the touch driving signal is sequentially provided, starting from an i-th touch driving line and, in the (J+1)-th touch display frame, the touch driving signal is sequentially provided, starting from an (i+1)-th touch driving line, where J and i are positive integers respectively and i=2 to N.
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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.
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Citations
14 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 thereby being integrated as a touch display frame in which a first touch driving signal is provided substantially close to a first display driving signal and a last touch driving signal is substantially close to a last display driving signal, and sequence of providing the touch driving signal to the N touch driving lines in a J-th touch display frame is different from that in a (J+1)-th touch display frame; wherein, in the J-th touch display frame, the touch driving signal is sequentially provided, starting from an i-th touch driving line and, in the (J+1)-th touch display frame, the touch driving signal is sequentially provided, starting from an (i+1)-th touch driving line, where J and i are positive integers respectively and i=2 to N. - View Dependent Claims (2, 3, 4, 5, 6)
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7. 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 a display frame 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 the touch frame and the display frame are synchronous and have the same time width thereby being integrated as a touch display frame in which a first touch driving signal is provided substantially close to a first display driving signal and a last touch driving signal is substantially close to a last display driving signal, and a sequence of providing the touch driving signal to the N touch driving lines in a J-th touch display frame is different from that in a (J+1)-th touch display frame; wherein, in the J-th touch display frame, the touch driving signal is sequentially provided, starting from an i-th touch driving line and, in the (J+1)-th touch display frame, the touch driving signal is sequentially provided, starting from an (i+1)-th touch driving line, where J and i are positive integers and i=2 to N. - View Dependent Claims (8, 9)
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10. A driving method for 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, 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, wherein K, L, N, M are each a positive integer, 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 by an integrated touch display controller 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 by the integrated touch display controller 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 thereby being integrated as a touch display frame in which a first touch driving signal is provided substantially close to a first display driving signal and a last touch driving signal is substantially close to a last display driving signal and, each touch display frame has different sequences of providing the touch driving signal to the N touch driving lines; wherein, in a J-th touch display frame, the touch driving signal is sequentially provided, starting from an i-th touch driving line and, in a (J+1)-th touch display frame, the touch driving signal is sequentially provided, starting from an (i+1)-th touch driving line, where J and i are positive integers respectively and i=2 to N. - View Dependent Claims (11, 12, 13, 14)
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Specification