Driving system and method of touch display panel

Abstract

The invention discloses a driving system of a touch display panel. The driving system comprises a panel and a grid driving circuit; the panel is provided with an active area and a plurality of touch electrodes arranged on the active area in a matrix mode. the grid driving circuit is connected with a plurality of grid lines which are sequentially arranged on the active region so as to provide grid driving voltage for driving; at least one grid line which is not covered by the touch electrode exists in the gate lines which are positioned in a range formed by the upper and lower adjacent touch electrodes; and the grid lines which are not covered by the touch electrodes, at least one gate line in front of the grid lines and at least one grid line behind the grid lines are selected as grid lines influencing coupling. When the grid lines influencing coupling are driven, the grid driving circuit enables the interval between the opening time of at least one grid line in the grid lines influencing coupling and the opening time of the previous grid line to be larger than a preset interval, and the distance between the opening time of each of the remaining grid lines influencing coupling and the opening time of the previous grid line is equal to the preset distance.

Description

technical field [0001] The present invention relates to a driving system and method of a touch display panel, in particular to a driving system and method of a touch display panel capable of avoiding horizontal stripes caused by gaps between touch point electrodes. Background technique [0002] The structure of the existing in-cell touch display panel is to cut the common electrode layer (VCOM) which was originally covered by the whole layer into multiple touch electrodes, such as figure 1 As shown, because the cutting of the common electrode layer 12 is a plurality of touch electrodes 11, the common electrode layer 12 that was originally fully covered must be cut to form a region that does not cover the common electrode layer 12. This region will cause The difference in the load of the pixels of the touch display panel, when driving the gate lines (Gate Lines), the gate lines (such as G[i]) not covered by the common electrode layer 12 and still covered by the common electro...

AI Technical Summary

Problems solved by technology

[0002] The structure of the existing in-cell touch display panel is to cut the common electrode layer (VCOM) which was originally covered by the whole layer into multiple touch electrodes, such as figure 1 As shown, because the cutting of the common electrode layer 12 is a plurality of touch electrodes 11, the common electrode layer 12 that was originally fully covered must be cut to form a region that does not cover the common electrode layer 12. This region will cause The difference in the load of the pixels of the touch display panel, when driving the gate lines (Gate Lines), the gate lines (such as G[i]) not covered by the common electrode layer 12 and still covered by the common electrode layer 12 Different gate lines (such as G[i-1], G[i+1], etc.) will have different coupling amounts, resulting in differences in the amount of coupling between the divided common electrode layers 12, thereby forming the phenomenon of Mura

Especially for GOA (Gate driver On Array) touch display panel, such as figure 2 As shown, the gate driving method is fixed-pitch scanning, so that the front and rear gate lines are successively turned on and the opening time differs by a preset interval (1H). Since the output width of the gate driving voltage of the gate line is relatively long ( 8H), resulting in a large amount of coupling to the common electrode layer of the panel in the adjacent gate line, so when the area that does not cover the common electrode layer is encountered, it is easier to cause the display to be different from other areas that cover the common electrode layer. difference

[0003] Therefore, the current touch display panel design cannot avoid the horizontal stripes caused by cutting the common electrode layer into multiple touch electrodes, and it is necessary to improve it.

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