Single-layer multi-point capacitive touch screen

Abstract

The invention discloses a single-layer multi-point capacitive touch screen which comprises a plurality of drive electrodes formed on a same electrode layer, lead-out wires, and a plurality of induction electrodes which are complementary with the drive electrodes but are wirelessly connected and mutually isolated, wherein each drive electrode and the induction electrode complementary with the drive electrode form a repeated electrode unit; each drive electrode is composed of a plurality of first strip electrodes whose upper parts are connected, and the appearance of each first strip electrode is similar to a plurality of Chinese characters 'zhong' connected up and down; the induction electrodes in the same column of repeated electrode units are directly connected so as to form a plurality of columns of induction electrodes, and the drive electrodes in the same row of repeated electrode units are connected through the lead-out wires on a flexible circuit board or a printed circuit board, thereby forming a plurality of rows of drive electrodes. Mutual-capacitance change is formed between the lateral walls of the drive electrodes and the induction electrodes before and after the detection, so as to determine a touch position.

Description

Technical field: [0001] The invention relates to a touch screen, in particular to the structure of a mutual capacitance active touch screen. Background technique: [0002] In the current touch screen field, there are mainly resistive touch screens, photoelectric touch screens, surface acoustic wave touch screens and capacitive touch screens. [0003] Resistive touch screen is still the leading product in the market at present, but the structure of the double-layer substrate of the resistive touch screen makes the touch screen and the display panel overlapped and used together, the reflection of the touch screen greatly affects the display brightness, contrast, color saturation, etc. The quality of the entire display will be greatly reduced, and increasing the brightness of the backlight of the display panel will also increase the power consumption; the analog resistive touch screen has the problem of positioning drift, which needs to be calibrated frequently; in addition, th...

AI Technical Summary

Problems solved by technology

[0008] However, the double-sided ITO capacitive touch screen needs to form two ITO coating layers on the insulating medium and etch them separately. The manufacturing process is more, which also makes the production cost higher.

However, the single-sided ITO bridging capacitive touch screen needs to bridge the electrodes on the same plane, and the complexity of the bridging process also makes the production cost higher.

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