Electromagnetic pen and control method thereof

Abstract

The invention discloses an electromagnetic pen and a control method thereof. The control method comprises the steps that the electromagnetic pen transmits a digital signal of a fixed frequency through a control assembly module therein, and modulates and codes to obtain electromagnetic pen pressure data information, wherein the control assembly module sends the digital signal through a micro control unit; the control assembly module sends the obtained electromagnetic pen pressure data information to a signal transmission module, and then the signal transmission module transmits a pulse signal through an induction coil. The electromagnetic pen and the control method thereof of the invention solves the problem in the prior art that electromagnetic pen chirography is obtained through an analog signal manner, resulting in that the process of obtaining pen pressure information always suffers from environmental external electromagnetic interfering signals, and an frequency acquisition error or occurrence of differences or even frequency jittering is prone to occur.

Description

technical field [0001] The invention relates to the technical field of wireless communication and touch control, in particular to an electromagnetic pen and a control method thereof. Background technique [0002] With the rapid development of information technology, portable mobile electronic devices are more and more closely related to people's life. Such a portable mobile electronic device can receive user input, and implement functions required by the user according to the input. The electromagnetic induction stylus is a common pen-type electronic input device, which is usually used with an electronic board. Its working principle is to simulate the writing track or other operations of the pen through electromagnetic induction technology. [0003] In the current electromagnetic stylus technology, the handwriting position of the electromagnetic pen is obtained through analog signals, and the pen pressure information is obtained through frequency changes generated by analog...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an electromagnetic pen and its control method, to solve the problem that currently the handwriting of the electromagnetic pen is obtained through an analog signal, and the process of obtaining the pen pressure information is often subjected to external electromagnetic interference signals from the environment, which is easy There is a problem of frequency acquisition error or discrepancy or even frequency jitter

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