Pressure compensation method and system of electromagnetic pen and terminal

Abstract

The invention discloses a pressure compensation method and system of an electromagnetic pen and a terminal. The pressure compensation method comprises steps of sampling different pressure of the standard electromagnetic pen, and generating and storing a pressure-frequency-line width table of the standard electromagnetic pen; performing pressure correction on the electromagnetic pen to be detected, calculating compensation frequency difference, and generating and storing a pressure frequency difference table of standard pressure-corrected frequency range-compensation frequency difference-line width; detecting actual frequency of the electromagnetic pen used by users to perform writing actually, and performing frequency compensation according to the pressure frequency difference table; matrixing the compensated frequency to obtain a corresponding line width value to display right line width. By means of the method and system, writing problems caused by errors of different electromagnetic pen elastic systems are solved, users can write smoothly with the electromagnetic pen in different hardness, and consistency of handwriting and user experience are improved.

Description

technical field [0001] The invention relates to the field of electromagnetic pens, in particular to a pressure compensation method, system and terminal for an electromagnetic pen. Background technique [0002] With the advancement of smart phones, there is now a mobile phone with an electromagnetic screen. Different from the usual resistive and capacitive touch screens, the electromagnetic screen needs to cooperate with the electromagnetic pen to complete the input, and it is the original handwriting input. [0003] The core circuit of the electromagnetic pen is a micropower transmitter with a transmission frequency around 400kHz. An LC oscillator constitutes an oscillating circuit. When writing, the physical displacement of the pen tip and the connected inductance iron core changes the inductance, and finally changes the frequency of the LC oscillator. The role of the electromagnetic screen is similar to the antenna array, which can receive the signal of the electromagneti...

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a handwriting pressure calibration of an electromagnetic pen that can make the handwriting consistent with the same writing force in order to solve the defect that different thicknesses of strokes will appear when using the same writing force with different electromagnetic pens in the prior art method and system

Images