Touch display apparatus and fabrication method therefor

Abstract

Embodiments of the invention disclose a touch display apparatus and a fabrication method therefor. The touch display apparatus comprises a display substrate, a first touch electrode layer, a second touch electrode layer, an upper polarizer and a cover plate, wherein the display substrate comprises an array substrate and a color filter substrate that are arranged oppositely, and a liquid crystal layer sandwiched between the array substrate and the color filter substrate; the first touch electrode layer is located on a second surface, far away from the array substrate, of the color filter substrate; the first touch electrode layer comprises a plurality of first electrodes extending in a first direction; the upper polarizer is located at the upper part of the first touch electrode layer; the cover plate is located at the upper part of the upper polarizer and has an upper surface and a lower surface opposite to the upper surface; the second touch electrode layer is located on the lower surface, facing to the upper polarizer, of the cover plate; and the second touch electrode layer comprises a plurality of second electrodes extending in a second direction. According to the touch display apparatus and the fabrication method therefor, the touch display apparatus is simple to fabricate and the product yield can be increased.

Description

technical field [0001] The present invention relates to the technical field of touch display, in particular to a touch display device and a manufacturing method thereof. Background technique [0002] The touch technologies of the existing touch display devices mainly include plug-in type, single glass touch type (One Glass Solution, OGS), in-cell (Incell) and out-embedd (Once) and other technologies. Since the touch screen and the display panel are set independently of each other, the plug-in touch display device has a large thickness and cannot meet the ultra-thin requirements of some handheld devices and portable devices, and has been gradually eliminated. The touch display device of OGS integrates the touch sensing layer and the protective glass and then attaches it to the display panel through optical glue. It has the advantages of high touch sensitivity and is one of the current mainstream touch technologies. The main disadvantages It is not strong enough and fragile. ...

AI Technical Summary

Problems solved by technology

Both the first touch electrode layer 13a and the second touch electrode layer 13b need to be coated. At present, the materials used for coating are usually transparent conductive materials such as indium tin oxide (IndiumTinOxides, ITO). After the first layer of film is coated, Etching and cleaning are required to form the first touch electrode layer 13a. After cleaning, a second layer of film is coated on the surface of the first layer of film, and the second layer of film is etched and cleaned to form the second touch electrode layer 13b, and here At least 4 illuminations are required in the process, and the cost is relatively high; if it is a multi-layer touch sensing layer 13, multiple coatings are required

In addition, the above touch display device needs to etch and clean the two superimposed films, which will increase the risk of circuit breakage in the touch sensing layer 13, so the yield rate is very low

If the wiring of one layer of touch sensing layer 13 breaks, it will cause the entire display device to be defective.

In addition, if the etching and cleaning are not clean, it will also affect the touch sensing function, which will also make the product defective, resulting in an increase in cost

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