Capacitive pen, capacitive touch panel and touch device

Abstract

The present invention provides a capacitive pen for operating on a capacitive touch panel (200), which includes: a sending unit (1), which sends a high-voltage AC signal to the capacitive touch panel (200); the capacitive pen controls A processing unit (2), which generates the high-voltage AC signal, and sends the high-voltage signal to the capacitive touch panel (200) through the sending unit (1), so that the capacitive touch panel (200 ) measuring the position information of the capacitive pen (100) according to the high voltage AC signal. The capacitive stylus provided by the present invention sends a high-voltage AC signal to the capacitive touch panel so that the capacitive touch panel can be positioned according to the high-voltage AC signal. Since the high-voltage AC signal is strong, the signal-to-noise ratio and positioning accuracy can be improved.

Description

technical field [0001] The invention relates to touch technology, in particular to a capacitive pen, a capacitive touch panel and a touch device. Background technique [0002] At present, because the capacitive touch screen is easy to operate and has high sensitivity, it has become the first choice for touch devices at this stage. Capacitive touch screens used in capacitive touch screens are generally made of transparent conductive ITO (indium tin oxide) films in glass or other transparent materials to form a criss-cross structure of conductive films, which can be used as sending electrodes and receiving electrodes. When a finger taps the screen, it will form a coupling capacitance with both the sending electrode and the receiving electrode, and absorb part of the current from the contact point, thereby causing the signal of the receiving electrode to change. That is, when the conductor touches the capacitive touch screen, the touch position of the conductor on the capaciti...

AI Technical Summary

Problems solved by technology

[0003] However, if a capacitive touch screen is operated with a thin pen tip made of conductive material, although the pen tip will also absorb part of the current from the contact point, because the pen tip is very thin, the absorption current has little effect on the receiving electrode and is difficult to detect, making the capacitive touch screen impossible. determine touch position

In order to have a greater impact on the receiving electrode, the tip of the capacitive pen must be very thick in addition to its conductive properties, which makes the pen have problems such as poor writing fluency, difficulty in precise clicking, and no pressure-sensitive characteristics, so it cannot achieve the purpose of writing and drawing. Effect

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