An embedded touch screen and its driving method

Abstract

The present disclosure relates to a field of displaying technology, and describes an in-cell touch screen and a method for driving the same. The in-cell touch screen comprises: a substrate; an electrode layer, formed on the substrate; and a touch driving module, wherein multiple rows of electrodes are formed on the electrode layer, and each row of electrodes is configured to drive at least one row of pixel units; the touch driving module comprises a plurality of signal lines corresponding to electrodes in one-to-one correspondence; and during a time period for displaying an image, when the image is to be displayed by the pixel units corresponding to a row of electrodes, the touch driving module is configured to input display driving signals to the row of electrodes and input touch driving signals to the other rows of electrodes simultaneously.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an embedded touch screen and a driving method thereof. Background technique [0002] In the prior art, the embedded touch screen In Cell, as the development direction of the future touch display, has the advantage of being light, thin, integrated and highly integrated. In In Cell products, the touch drive electrodes and the common electrodes of the touch screen share the same electrode, and in order to avoid the mutual interference between the display function and the touch function in the shared electrodes, the current InCell mostly uses separate It is driven in a time-driven manner, and a frame time is divided into two parts within a frame display time, and the touch drive signal is passed to the electrode in a part of the time to make the electrode layer used for the touch function. At this time, the electrode layer cannot be used for display; in another part of the time, a ...

AI Technical Summary

Problems solved by technology

In In Cell products, the touch drive electrodes and the common electrodes of the touch screen share the same electrode, and in order to avoid the mutual interference between the display function and the touch function in the shared electrodes, the current InCell mostly uses separate It is driven in a time-driven manner, and a frame time is divided into two parts within a frame display time, and the touch drive signal is passed to the electrode in a part of the time to make the electrode layer used for the touch function. At this time, the electrode layer cannot be used for display; in another part of the time, a display drive signal is passed to the electrode layer to make the electrode layer used for display function, and the electrode layer cannot be used for touch control at this time

[0003] Although the above method can avoid the mutual interference between the display function and the touch function, at the same time, the above method will greatly reduce the time for the electrodes to realize the touch function and display function in each frame time, so that the electrodes The scanning frequency of the touch signal in the medium should not be too high, thereby sacrificing the touch characteristics and display characteristics of the touch screen, causing design difficulties and degraded image quality to the display, especially the high-definition display, and it is also difficult to improve the touch performance.

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