Data transmission method, system and device between capacitive stylus and touch screen

Abstract

The invention discloses a data transmission method and system between a capacitive stylus and a touch screen, the capacitive stylus and the touch screen. The method comprises the following steps: the capacitive stylus acquires data to be transmitted; the capacitive stylus generates a first excitation signal according to the data to be transmitted and a receiving time sequence of a receiving electrode in the touch screen; and the capacitive stylus emits the first excitation signal to enable the receiving electrode to decode the first excitation signal according to the receiving time sequence to acquire the data to be transmitted. According to the method provided by the embodiment of the invention, when the capacitive stylus generates the first excitation signal, multi-level systems such as a ternary system and a quinary system are adopted for coding, so that the data transmission time is shortened, the data transmission accuracy is improved, and the user experience is improved.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a data transmission method between a capacitive pen and a touch screen, a data transmission system, a capacitive pen and a touch screen. Background technique [0002] Capacitive pens are mainly divided into two types: active and passive. The passive capacitive pen is a common soft-tipped thick-tipped pen in the industry. When the hand holds the pen, the pen and the hand are connected, instead of fingers touching the screen. The capacitance change caused by this passive capacitive pen is small, so it is necessary to use a soft head and a thick head to increase the contact area to increase the capacitance change. But this kind of strokes on the screen does not feel good, and there is no corresponding pressure detection circuit inside, so it is impossible to measure data such as pressure and keys, and it is impossible to realize handwriting recognition and other functions. [...

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned method of transmitting the pressure value or button signal to the host has the following disadvantages: (1) the wired method is simple in technology but inconvenient to use, and the line connected to the pen will affect the feel of use; (2) the built-in wireless The cost of the module is high, the power consumption is high, and the volume is difficult to make small; (3) The method of pen tip transmission and capacitive screen reception has the lowest cost, but it is difficult to realize

Since the sliding speed of the capacitive pen on the touch screen is very fast, the more data bits, the longer the time required for data transmission, the greater the displacement of the capacitive pen on the screen, the higher the error rate of the data received by RX, and thus Affect the user experience

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