Protective film, touch display screen and making method of touch display screen

Abstract

The invention discloses a protective film, a touch display screen and a making method of the touch display screen. Specifically, the protective film comprises a first release layer, a second release layer and a functional layer located between the first release layer and the second release layer, the functional layer comprises a first adhesive layer, a polyimide layer and a second adhesive layer,the protective film is provided with a plurality of mutually spaced protective layer pattern areas and pattern gap areas located at the peripheries of the protective layer pattern areas, the polyimidelayer is only correspondingly arranged in each protective layer pattern area, and the polyimide layer is not arranged at positions corresponding to the pattern gap areas; the protective film protectsa touch electrode layer from being damaged and polluted in the follow-up making process, no residual glue is left during tearing, and the touch electrode layer is not damaged during tearing, the touch electrode layer is made before assembly into box, the performance of the touch electrode layer, a frame glue and liquid crystals are optimized, and the making steps of the touch display screen are simplified.

Description

technical field [0001] The present invention relates to the field of display technology, and more specifically to a protective film, a touch display screen and a method for manufacturing the touch display screen. Background technique [0002] With the development of the information age, touch technology is widely used in display devices due to humanized design; according to the working principle of the touch display and the medium for transmitting information, the touch display can be divided into four categories, respectively It is a resistive touch display, a capacitive sensing touch display, an infrared touch display, and a surface acoustic wave touch display. For capacitive touch screens, On-Cell Touch technology has become a mainstream touch product due to its low cost and multi-touch capability. [0003] Please refer to figure 1 , shows the structure of a touch display screen with On-Cell Touch structure in the prior art. In the existing manufacturing method of the ...

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Problems solved by technology

[0006] 3. The insulating layer should be baked and cured at a low temperature, such as lower than 130°C, to avoid adverse effects on the materials of the frame glue 16 and liquid crystal 17, but the low-temperature baking makes the hardness of the insulating layer not meet the requirements, and Some components cannot be completely driven out, causing outgas problems in the subsequent process, and low-temperature and long-term baking still cannot avoid adverse effects on the frame glue 16 and liquid crystal 17

Please refer to figure 2 In order to prevent the touch electrode layer 12 from being polluted or damaged in the subsequent process, it is necessary to cover the touch electrode layer 12 with an OC protective layer 13. The commonly used OC protective layer 13 needs to be grown at 70-80°C with high-concentration lye. It can only be removed after soaking for a while. In order to prevent the touch electrode layer 12 from being damaged by lye, a SiNx protective layer 14 is required to isolate the touch electrode layer 12 and the OC protective layer 13. The steps are cumbersome. May also cause cutting abnormalities

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