Mutual capacitance type touch screen

Abstract

The invention provides a mutual capacitance type touch screen which comprises a touch substrate, a metal support layer, an insulating layer and at least two transparent conductive film layers, wherein the metal support layer is arranged on the lower portion of the touch substrate and comprises a transverse support and a longitudinal support; the insulating layer is arranged between the transverse support and the longitudinal support; the transparent conductive film layers comprise a transverse transparent conductive film layer and a longitudinal transparent conductive film layer, the transverse support is electrically connected with the transverse transparent conductive film layer to form a transverse electrode, and the longitudinal support is electrically connected with the longitudinal transparent conductive film layer to form a longitudinal electrode; a transverse transparent conductive film is arranged along the transverse support, and the width of the transverse transparent conductive film in the direction vertical to the transverse support is larger than the width of the transverse support. According to the mutual capacitance type touch screen, signal transmission is achieved through the metal support layer, RC loading is reduced, and the transverse transparent conductive film layer and the longitudinal transparent conductive film layer can be manufactured to be larger and can be suitable for a mutual capacitance type touch screen of a large dimension.

Description

technical field [0001] The invention relates to a touch screen, in particular to a mutual capacitive touch screen applicable to large-size screens. Background technique [0002] With the development of science and technology, the display screens of various electronic devices such as computers, mobile phones, digital cameras, and MP3 players have been gradually replaced by touch screens. [0003] In the field of touch screen, it is divided into resistive type, capacitive sensing type, infrared type and surface acoustic wave type. The working principle of the capacitive touch screen is to use the current induction of the human body. When the conductor touches the screen, due to the electric field of the human body, the user and the surface of the touch screen form a coupling capacitance. For high-frequency current, the capacitance is a direct conductor, and the conductor absorbs from the contact point. Take a small current, this current flows out from the electrodes on the fo...

AI Technical Summary

Problems solved by technology

[0004] The traditional capacitive touch screen uses a conductive film layer as the electrode conduction layer. Due to the hardness of the film layer, it is difficult to manufacture a large-sized capacitive touch screen. When the whole is bent and deformed by force, the interface is prone to separation, resulting in electrode disconnection and touch failure. , the touch sensing components are damaged; and the use of metal as the electrode conductive layer brings the defect of decreased light transmittance

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