Pressure detecting capacitance pen

Abstract

The invention relates to a pressure detecting capacitance pen. The capacitance pen comprises a pen body and a pen head which is located at the front end of the pen body, the pen body and the pen head are mutually fixed through an elastic element, a capacitance detecting chip is arranged in the pen body, two induction electrodes and a drive electrode are arranged on the capacitance detecting chip, the two induction electrodes are located in the pen body, the drive electrode is located in the pen head, and when the elastic element is compressed, distances between the drive electrode on the pen head and the two induction electrodes in the pen body respectively change. By means of the pressure detecting capacitance pen, a pen end can induct the changes of pressure without a large force, so that a touch panel can be protected, a user is merely required to slightly slide on the touch panel so as to achieve touch control, the sensitivity of the touch panel is greatly improved, and the anti-interference capability is enhanced.

Description

technical field [0001] The invention relates to a capacitance pen, in particular to a pressure detection capacitance pen. Background technique [0002] With the widespread application of interactive capacitive touch screens, the stylus, which is an important tool for human-computer interaction, has also been widely used. The main function of the stylus is that the writing action triggers the input device of the stylus, which can generate different signals according to different applications. For example, when writing, emit infrared rays and use the optical writing positioning device to complete the positioning of the writing position; when writing, emit ultrasonic waves and use the ultrasonic positioning device to complete the positioning of the writing position; Variety. [0003] At present, the most common application is to complete the writing action through mechanical contact, such as electronic switches, conductive rubber switches, etc. The most common trigger device ...

AI Technical Summary

Problems solved by technology

Since the conductive rubber used in the above technical solution is prone to aging and has defects such as poor conductivity and insufficient elasticity, the reliability of this electronic pen to trigger the writing action is poor and needs further improvement.

[0004] In order to improve the above shortcomings, it has recently been proposed to locate the writing position by detecting the capacitance change from the stylus to the electronic writing device when writing. The tip of the pen is generally thin, so the use of capacitance changes to detect the writing position will receive external interference. In severe cases, it is even difficult to distinguish whether it is a signal from the stylus or an interference signal. Therefore, this capacitive stylus also needs to be developed. Improve

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