Embedded type touch display panel

Abstract

The invention provides an embedded type touch display panel. A third metal layer is added to a TFT substrate, the third metal layer is adopted as a driving electrode and an induction electrode, the induction electrode comprises a plurality of parallel first vertical parts and a plurality of first horizontal parts perpendicularly connected with the first vertical parts, and the driving electrode comprises a plurality of parallel second vertical parts and a plurality of second horizontal parts perpendicularly connected with the second vertical parts; the multiple second vertical parts and the multiple first vertical parts are staggered and distributed in the longitudinal direction; every two adjacent second vertical parts of the driving electrode are connected through bridging wiring in a second metal layer, the mutual capacitance touch function is achieved, the coupling length between the driving electrode and the induction electrode can be increased to increase lateral capacitance between the driving electrode and the induction electrode, the integration level of a display panel is increased, charge gathering caused at the bridging position of the driving electrode is lowered whilethe number of touch signal wires is decreased, the touch performance and the user experience are improved, and the signal to noise ratio is increased.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to an embedded touch display panel. Background technique [0002] With the development of display technology, liquid crystal displays (Liquid Crystal Display, LCD) and other flat display devices are widely used in mobile phones, televisions, personal Various consumer electronic products such as digital assistants, digital cameras, notebook computers, and desktop computers have become the mainstream of display devices. [0003] Most of the liquid crystal displays currently on the market are backlight liquid crystal displays, which include a liquid crystal display panel and a backlight module. The working principle of the liquid crystal display panel is to pour liquid crystal molecules between the thin film transistor array substrate (ThinFilm Transistor Array Substrate, TFT Array Substrate) and the color filter (ColorFilter, CF) substrate, and apply a driving voltage on the...

AI Technical Summary

Problems solved by technology

[0005] like figure 1 As shown, it is an existing touch display panel, which includes: a plurality of driving electrodes 1 distributed in an array at intervals, and a plurality of sensing electrodes 2 arranged alternately and insulated from the plurality of driving electrodes 1 . Two adjacent sensing electrodes 2 are connected and two adjacent driving electrodes 1 are spaced apart. The two adjacent driving electrodes 1 are connected through a metal wire 3 insulated from the sensing electrodes 2 as a bridge, and mutual capacitance is used to realize contact In the prior art, the shape of the driving electrode 1 and the sensing electrode 2 are both diamond-shaped and the driving electrode 1 and the sensing electrode 2 are formed by cutting the common electrode layer, so that when the metal trace 3 overlaps with the driving electrode 1, the contact impedance is too high large, resulting in charge accumulation problems

With the development of touch display technology, terminal equipment puts forward higher requirements for touch LCD panels. The thickness of touch display panels needs to be made thinner and the display resolution is higher. Therefore, the signal transmission required There are more and more lines, and at the same time, in the case of continuous development of full screens, higher requirements are placed on the width of the border area of ​​the touch display panel. Although Chip-On-Film (COF ) scheme can narrow the border, but there are certain restrictions on the number of processes and signal transmission lines

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