Anti-interference key touch capacitive screen

Abstract

The invention discloses an anti-interference key touch capacitive screen which comprises a substrate, a transparent conducting layer is plated on the front face of the substrate, a plurality of key induction areas are arranged on the transparent conducting layer, the part, except the key induction areas, of the transparent conducting layer is a key shielding area, and the key induction areas and the key shielding area are separated through etching belts; key lead-out wires are printed on the back surface of the substrate, a plurality of lead-out wire lap joint parts in one-to-one correspondence with the key induction areas are arranged on wires in the key lead-out wires, substrate via holes are formed in the positions, corresponding to the lead-out wire lap joint parts, of the substrate, and the key induction areas and the lead-out wire lap joint parts are in conduction connection through conductive silver paste poured into the substrate via holes; and a ground wire in the key lead out wire is connected with the key shielding area in a conducting manner. The key shielding area can serve as a shielding layer, and capacitive screen key false triggering caused by large-area contact of a human body is avoided.

Description

technical field [0001] The invention relates to the technical field of capacitive screens, in particular to an anti-interference button touch capacitive screen. Background technique [0002] With the popularization of capacitive touch screen applications, the application of various button touch capacitive screens has gradually become common. Compared with traditional mechanical buttons, button touch capacitive screens have the advantages of more sensitivity, more reliability, longer life, and more beautiful appearance. There are more and more applications of button touch capacitive screens replacing mechanical buttons, especially in the application of household appliances such as washing machines and microwave ovens. On the existing large-size touch capacitive screens like washing machine control panels, the touch buttons far away from the control chip The conductive line is very long. When this long line is touched with fingers, there will be no false touch interference. Ho...

AI Technical Summary

Problems solved by technology

There are more and more applications of button touch capacitive screens replacing mechanical buttons, especially in the application of household appliances such as washing machines and microwave ovens. On the existing large-size touch capacitive screens like washing machine control panels, the touch buttons far away from the control chip The conductive line is very long. When this long line is touched with a finger, there will be no false touch interference. However, when the palm, arm, leg and other parts touch the capacitive screen with a large area, there is a possibility of false touch of the key.

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