Production method of touch screen

Abstract

The invention relates to a method for preparing a touch screen, which includes steps as follows: providing a flexible matrix; preparing at least one carbon nano tube film; laying the carbon nano tube film on the surface of the flexible matrix, thereby forming at least one layer of carbon nano tube film covering the surface of the flexible matrix; hot-pressing the flexible matrix with the layer of carbon nano tube film; forming two electrodes at internals at two ends of the layer of carbon nano tube film after hot-pressing or two ends of the flexible matrix, thereby forming an electrode plate taken as a first electrode plate; repeating the steps and preparing another electrode plate taken as a second electrode plate; forming an insulating layer on the periphery of one side of the layer of carbon nano tube film formed by the first electrode plate or the second electrode plate; and covering the insulating layer with another electrode plate to arrange the layer of carbon nano tube film in the first electrode plate and the layer of carbon nano tube film in the second electrode plate in an opposite manner, thereby forming the touch screen.

Description

technical field [0001] The invention relates to a method for preparing a touch screen, in particular to a method for preparing a flexible touch screen. Background technique [0002] In recent years, along with the high performance and diversification of various electronic devices such as mobile phones and touch navigation systems, there has been an increase in the number of electronic devices in which light-transmitting touch panels are mounted on the front of display elements such as liquid crystals. Users of such electronic devices operate by pressing the touch panel with fingers or a pen while visually confirming the display content of the display element located on the back of the touch panel through the touch panel. Thereby, various functions of the electronic device can be operated. [0003] According to different working principles and transmission media of touch screens, existing touch screens are usually divided into four types, namely resistive, capacitive sensing...

AI Technical Summary

Problems solved by technology

As a transparent conductive layer, the ITO layer has disadvantages such as poor mechanical and chemical durability, and cannot be bent. Therefore, the above-mentioned touch screen is only suitable for setting on non-deformable traditional display devices, and cannot be used for flexible display devices.

In addition, the ITO layer is currently mainly prepared by sputtering or evaporation methods. During the preparation process, a relatively high vacuum environment and heating to 200°C to 300°C are required. Therefore, the preparation cost of the ITO layer is relatively high.

Furthermore, using the ITO layer as the transparent conductive layer has the phenomenon of uneven resistance distribution, which leads to problems such as low resolution and low accuracy in the existing resistive touch screen.

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