Single-layer multi-point capacitive touch screen

Abstract

The invention discloses a single-layer multi-point capacitive touch screen which comprises a plurality of driving electrodes and lead-out wires formed on a same electrode layer, and a plurality of induction electrodes which are complementary with the driving electrodes in shapes, are isolated from each other and are in non-electrical connection, wherein each driving electrode and one induction electrode which is complementary with the driving electrode in shape form a repeated electrode unit; each driving electrode consists of a frame and a K-shaped electrode, wherein the frame is formed by three sides of a rectangle, and the K-shaped electrode is formed by the sides between the other two sides; the induction electrodes positioned in the repeated electrode units in the same column are directly connected so as to form a plurality of columns of induction electrodes; and the driving electrodes in the repeated electrode units in the same row are connected on a flexible printed circuit board or a printed circuit board through the lead-out wires so as to form a plurality of rows of driving electrodes. Mutual capacitance change is formed between side walls of the driving electrodes and the induction electrodes before and after touch detection, so that the touch position is determined.

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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