Touch detection component, touch control device and portable electronic equipment

Abstract

The invention discloses a touch detection component comprising a substrate and a plurality of sensing units. The sensing units are arranged on the substrate without interaction. Each sensing unit comprises a sensing body, a first electrode and a second electrode, wherein the sensing body is provided with a first end and a second end, the first electrode is connected with the first end of the sensing body, the second electrode is connected with the second end of the sensing body, the sensing body is provided with a plurality of hollowed-out portions, the hollowed-out portions are arranged by a preset rule so as to limit a current path portion for increasing resistance between the first electrode and the second electrode on the sensing body, the current path portion extends between the first end and the second end of the sensing body in a curved way, and sectional area of the current path portion on a plane orthogonal with the extending direction is smaller than that of the sensing body on the plane. According to the touch detection component in the embodiment, resistance required by detection accuracy can be obtained, and sensing linearity is improved. The invention further discloses a touch control device and portable electronic equipment.

Description

technical field [0001] The invention relates to the technical field of electronic equipment design and manufacture, and in particular to a touch detection component, a touch control device with the touch detection component, and a portable electronic device. Background technique [0002] Currently, touch detection components (touch screens) are used in electronic devices such as mobile phones, PDAs (Personal Digital Assistants), GPS (Global Positioning System), PMPs (MP3, MP4, etc.), and even tablet computers. The touch screen has the advantages of simple, convenient and humanized touch operation, so the touch screen is expected to become the best interface for human-computer interaction and has been widely used in portable devices. [0003] Capacitive touch detection components are generally classified into two types: self-capacitive and mutual-capacitive. The existing single-layer self-capacitance touch screen has strip-shaped scan electrodes made of ITO (Indium Tin Oxide...

AI Technical Summary

Problems solved by technology

Although the self-capacitive touch detection component has a simple structure, it is not optimized for the capacitive sensing of the screen, and the capacitance change is small, resulting in insufficient signal-to-noise ratio

In addition, since the sensing unit is a triangle, the area does not increase linearly when the finger moves laterally, so the linearity is poor, which leads to the offset of the coordinate calculation, and the linearity is not good enough

[0006] In addition, the capacitance change output by the traditional capacitance sensing unit is very small, reaching the femtofarad level, and the existence of stray capacitance in the cable puts forward higher requirements for the measurement circuit

Moreover, stray capacitance will change with many factors such as temperature, location, internal and external electric field distribution, etc., which will interfere or even submerge the measured capacitance signal

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