Method and system for dynamically adjusting pressure sensitivity

Abstract

The invention provides a method and system for dynamically adjusting pressure sensitivity, and the method comprises the following steps: S1, measuring a pressure value: measuring the pressure at the same time interval T, obtaining N pressure values, and enabling N to be greater than or equal to 3; s2, calculating an average value of N pressure values: performing interference removal processing onthe pressure values to obtain a pressure value average value F; s3, calculating the pressure change speed: measuring the time interval of the (N-1) th measurement and the (N-2) th measurement, and obtaining the pressure change speed V according to the pressure values obtained by the (N-1) th measurement and the (N-2) th measurement; and S4, calculating a pressure sensitive value P by adopting a linear equation. The pressure sensing output is adjusted by combining the pressure and the pressure change speed; in the handwriting input process, the pressure sense needs to be low, the pressure change speed is small, the force adjusting range is wide, drawn lines are finer, and when the pressure change speed is high, the large pressure sense can be achieved with small force, more labor is saved,and the handwriting input efficiency is effectively improved.

Description

【Technical field】 [0001] The invention relates to the field of pressure sensing, in particular to a method and system for dynamically adjusting pressure sensing. 【Background technique】 [0002] A handwriting tablet is an electronic product that uses a special pen or finger to write or draw in a special area. At present, the handwriting tablet generally receives the pressure in a certain area and converts it into a pressure sense for forming lines. When the board leaves the factory, the pressure-pressure-sensitivity curve is set by the software in the product design stage, that is, the relationship between pressure and pressure-sensitivity has a fixed initial conversion coefficient. Specifically, the pressure-sensitivity P is a function of the pressure F, that is, P=f (F), this fixed pressure and pressure-sensitivity conversion method is likely to bring inconvenience to the user. [0003] Due to the different writing habits and drawing habits of each person, their writing re...

AI Technical Summary

Problems solved by technology

figure 1 11 is the pressure-sensitivity curve set at the factory, and 12 is the pressure-sensitivity curve formed by adjusting the conversion coefficient of pressure-sensitivity when the user changes from a heavy line to a light line. 13 is the pressure-sensitivity curve formed by the user needing to constantly adjust the conversion coefficient of pressure-sensitivity when switching from a lighter line to a heavier line. From this, it can be obtained that the conversion coefficient of pressure-sensitivity should be continuously adjusted It will affect the efficiency of drawing without continuously adjusting the conversion coefficient of pressure-sensitivity. Once the conversion coefficient of pressure and pressure-sensitivity is small, the formed drawing line is easy to be inconspicuous. When the conversion coefficient of pressure-sensitivity is large, the The formed drawing line is easy to exceed the maximum range required, and finally increases the frequency of modification and reduces the efficiency of drawing

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