Electromagnetic induction type multi-channel handwriting input system and method

Abstract

The invention discloses an electromagnetic induction type multi-channel handwriting input technical system and method. The electromagnetic induction type multi-channel handwriting input technical system comprises two or more electromagnetic pens, a signal transceiving and selecting module and a signal processing and control module, wherein the electromagnetic pens are wirelessly connected with the signal transceiving and selecting module through continuously variable electromagnetic waves; the signal transceiving and selecting module is connected with the signal processing and control module; the signal processing and control module is connected with a microprocessor. The invention provides the electromagnetic induction type multi-channel handwriting input technical system which can respond to at least more than two electromagnetic signals and a resonant electromagnetic pen input device; the device can provide support for one electromagnetic induction signal processing and control module to allow two or more wireless electromagnetic pens to operate simultaneously, so that a function of synchronous multi-channel handwriting input can be achieved.

Description

technical field [0001] The present invention relates to an electromagnetic induction multi-channel handwriting input technology, in particular to an electromagnetic induction multi-channel handwriting input device and system, and also relates to a technical method based on electromagnetic induction multi-channel handwriting input and touch. Background technique [0002] The prior art electromagnetic induction touch and input technology mainly uses a single electromagnetic pen and matching electromagnetic induction device to complete single touch and single channel handwriting input operations, therefore, it can be called single touch and input. Single-channel handwriting input technology. [0003] In order to realize that two or more electromagnetic pens can simultaneously perform touch and handwriting input operations, an electromagnetic induction multi-touch and input technology has occurred, and the Chinese patent publication number is CN101685366A which is called "with m...

AI Technical Summary

Problems solved by technology

Since this patent adopts a single frequency selection technical solution, although in principle the "simultaneous" operation of two or more electromagnetic pens can be realized, there are certain limitations in practical application. Different electromagnetic pens are set with different transmission center frequencies and bandwidths. When two (or more) electromagnetic pens are used at the same time, the signals of different electromagnetic pens are likely to be superimposed. The frequency selection characteristics of this realization principle are poor. When different electromagnetic pens are operated at the same time, it is easy to generate signal crosstalk and cause misreading; second, when only two electromagnetic pens are used at the same time, if the distance between the two electromagnetic pens is close enough to sense in the same antenna matrix loop, there will be The situation of signal confusion will also affect its normal use; third, the electromagnetic pens used in the same system at the same time must have different transmission frequencies, that is to say, an electromagnetic touch and input system should be equipped with two or more pens. When using electromagnetic pens, these electromagnetic pens must have different specifications, which will affect the convenience of large-scale production, actual use and maintenance of electromagnetic pens, and also reduce their practicability

[0005] Obviously, in the existing electromagnetic induction multi-touch technology, whether it is an active technology or a passive technology, there are still problems such as certain technical limitations and impracticality.

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