Single-chip type capacitive touch screen

Abstract

A single-chip type capacitive touch screen comprises a transparent substrate and a shielding layer, wherein the inner surface of the shielding layer is connected with the transparent substrate, a cover bottom layer of which the optical density is larger than that of the shielding layer is formed on the outer surface of the shielding layer, the outer side edge of the shielding layer is spaced from the peripheral side edge of the transparent substrate, a shielding enhancement layer of which the optical density is larger than that of the shielding layer is arranged in a position close to the inner side edge of the shielding layer, the shielding enhancement layer is arranged around the inner side periphery of the shielding layer, one part of the shielding enhancement layer is positioned between the shielding layer and the transparent substrate, and the other part of the shielding enhancement layer extends out from the inner side edge of the shielding layer. The side edges cannot have side erosion phenomena. Besides, the light shielding effect of the shielding layer is great, and light leaking phenomena can be prevented from occurring on the inner side edge.

Description

technical field [0001] The invention relates to a touch technology, in particular to a single-chip capacitive touch screen. Background technique [0002] With the rapid development of information industries such as information technology and wireless communication technology, people's demand for electronic products is increasing day by day. In order to make products more convenient for people to operate and use, many electronic products have begun to use touch screens as input devices. The human-computer communication method is more and more widely used in people's life and work because of its vivid and intuitive operation interface and in line with the human body's usage habits. [0003] A traditional capacitive touch screen usually includes a protective cover and a touch sensing module, and the protective cover and the touch sensing module are bonded by OCA glue. The capacitive touch screen with this structure is thicker and has poor light transmission performance; and Th...

AI Technical Summary

Problems solved by technology

[0005] With product users' demand for diversified appearance of touch screens, in recent years, other colors have gradually appeared on the shielding layer of capacitive touch screens, such as white, gold or red capacitive touch screens; due to white, gold or red photoresist or The optical density of the ink material is low. When using these photoresists or inks with low optical density to make the masking layer, in order to achieve a good light-shielding effect, the thickness of the masking layer is usually processed thicker. The thicker masking layer exists The following problems: (1) When the circuit layer is made on the shielding layer of this structure, because the thickness of the shielding layer is thick, it is very easy to cause disconnection in the circuit layer; (2) Due to the low optical density of the shielding layer, such as The process control is not good. After the finished touch screen is bonded to the LCM, the light emitted by the LCM is prone to light leakage on the shielding layer; especially at the inner edge of the shielding layer, due to technological rea

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