Stylus pen

Abstract

The invention discloses a stylus pen, comprising a penholder, a writing point and an elastic element, wherein, the penholder and the writing point are connected into a carrier which can transmit the induction current of human bodies; the writing point comprises a first pen point and a second pen point which connects the penholder and the first pen point, and the first pen point is thinner than the second pen point; one end of the first pen point is provided with a first writing surface; one end of the second pen point is provided with a second writing surface the touch screen of which generates capacitance; the second pen point forms a cavity along the axis of the stylus pen for the first pen point to pass through flexibly; and the elastic element is arranged in the cavity between the penholder and the first pen point. The stylus pen can be accurately located on the touch screen through the first pen point, can be retracted into the second pen point through the retractable first pen point to lead the writing surface of the first pen point and the writing surface of the second pen point to form a complete writing surface, so as to increase the capacitance between the stylus pen and the touch screen, thus the touch screen system can detect touch events to realize handwritten input.

Description

technical field [0001] The invention relates to a stylus, in particular to a stylus used on electronic products with capacitive touch screens. Background technique [0002] As an input device, capacitive touch screen has been widely used in various electronic products. Its working principle is that when the user touches an object such as a finger to touch the screen, due to the electric field of the human body, the finger and the surface of the touch screen form a coupling capacitor. For high-frequency current, the capacitor is a direct conductor, so the finger absorbs a small current from the touch point. This current flows from the electrodes on the four corners of the touch screen respectively, and the current flowing through these four electrodes is proportional to the distance from the finger to the four corners. The controller accurately calculates the position of the touch point by calculating the ratio of the four currents. Therefore, the capacitive touch screen req...

AI Technical Summary

Problems solved by technology

However, the material requirements for this kind of pen head are relatively strict, and the process of restoring the original shape of the pen head after picking up the pen is slow, which is not conducive to switching between various operations such as writing and quickly clicking menu buttons, and cannot satisfy the user's operating experience

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