A control method for an electromagnetic capacitance dual-mode touch control system

Abstract

The present invention discloses a control method of an electromagnetic capacitance dual-mode touch system. The method comprises the steps that an electromagnetic pen emits a digital signal of a fixed frequency by using a micro control unit, and pen pressure data information is acquired by modulating a code; based on the pen pressure data information, an inductive coil emits an electromagnetic signal; an electromagnetic capacitance dual-mode touch apparatus receives the electromagnetic signal sent by the electromagnetic pen and a capacitance signal of a trigger screen, and a C to L port is set as a low frequency according to a preset time threshold and a time interval; if the C to L port is determined as the low frequency, an L to C port is set as the low frequency, an electromagnetic control module is in a working state, and electromagnetic signal input is detected; and if the C to L port is determined as a high frequency, a capacitance control module is in a working state, and capacitance signal input is detected. In the prior art, when the handwriting of the electromagnetic pen is acquired in a manner of analog signal, the process of acquiring the pen pressure information is usually interfered with an environment external electromagnetic interference signal, consequently, the wrong frequency is acquired or difference even frequency jitter occur. The method solves the above problems.

Description

technical field [0001] The invention relates to the technical fields of wireless communication and touch display, in particular to a control method of an electromagnetic capacitance dual-mode touch system. 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 touch panel. 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 frequenc...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a control method of an electromagnetic capacitive dual-mode touch system to solve the problem that the handwriting of the electromagnetic pen is obtained through an analog signal, and the process of obtaining the pen pressure information is often affected by the external electromagnetic force of the environment. Interference signals are prone to frequency acquisition errors or differences or even frequency jitter problems. At the same time, it solves the problem that in the current electromagnetic capacitive dual-mode touch device, when the electromagnetic data and capacitive data are input, the two data will interfere with each other, resulting in the electromagnetic capacitive touch screen. The problem of error in receiving data

Images