Active capacitive pens, capacitive touch panels and touch devices

Abstract

The invention provides an active capacitance pen, which is used for operating on a capacitance touch panel (200). The active capacitance pen comprises a communication unit (1), a control processing unit (2) and a sending unit (5), wherein the communication unit (1) is connected with a capacitance pen (100) and the capacitance touch panel (200) and is used for receiving a synchronizing signal synchronous with a measurement signal sent by the capacitance touch panel (200); the control processing unit (2) is communicated with the communication unit (1) and is used for generating a high-voltage signal synchronous with the measurement signal according to the received synchronizing signal; the sending unit (5) sends the high-voltage signal to the capacitance touch panel (200) to enable the capacitance touch panel (200) to obtain the touch information and / or position information of the capacitance pen (100). According to the capacitance pen provided by the invention, the synchronizing high-voltage signal is sent to enhance the induction signal of the touch panel, the touch panel can be used for sensing a small-area electric conductor, the function of the pen is expanded on the basis of finger touch, and the user experience is greatly improved.

Description

technical field [0001] The invention relates to touch technology, in particular to an active capacitive pen 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 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 capacitive screen is detected th...

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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