A stylus system

Abstract

The invention provides a touch-control pen system, comprising a conductor tip and a connection, wherein the connection is used for connecting the conductor tip with a first node of a drive circuit. According to the system, the problem of the sensing of a touch-control pen can be solved, and the problem of differentiation for a signal of the system from other signals can be relatively and perfectly solved; and moreover, the scheme provided by the invention is low in cost, and convenient for large-scale popularization.

Description

technical field [0001] The invention relates to a touch pen system, in particular to a capacitive touch pen system matched with a capacitive touch device. Background technique [0002] A capacitive touch screen generally includes an electrode group or electrode network and a circuit (such as a touch control circuit) for sensing or detecting changes in capacitance on the electrodes. When a finger approaches the electrodes some capacitance is introduced so that the finger can be sensed and located. When operating with one finger, it will obviously lead to a larger induction amount of the larger finger, because the larger finger has a larger contact area; another factor is that the fingertips of the human hand are soft and will spread out on the contact surface. form a larger contact area. Therefore, a finger on an excellent touch panel can generate a large amount of capacitance change, which can be easily detected. In general, a typical finger contact will form a circular s...

AI Technical Summary

Problems solved by technology

But when the stylus slides on the screen, there are two problems. First, the tip diameter of the stylus is very small, usually only 2mm in diameter. In addition, the material of the tip is generally hard.

The stylus is produced for a more comfortable writing feel and more precise operation, but its own conditions are contradicted by the larger contact area required by the capacitive screen

The small amount of capacitance change produced by the stylus (the signal generated by the pen) often makes it difficult for the touch circuit to distinguish it from the noise signal of the measurement system itself, which is the problem of signal-to-noise ratio

Another problem worth mentioning is how to separate the signal generated by the pen from the signal generated by the finger.

There are two situations here. First, the small signal generated by the stylus will be confused with the small signal generated when the finger is far away from the touch screen or touchpad. The other situation is when the hand holding the stylus touches the When touching a touch screen or trackpad, it will also be sensed, which makes it more difficult to detect and track the signal generated by the stylus

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