Alternating current pointing light pen, multi-light-pen identification device and method of multi-light-pen identification

Abstract

The invention discloses an alternating current pointing light pen, a multi-light-pen identification device and a method of multi-light-pen identification. The shell of the alternating current pointing light pen is internally provided with an alternating light control circuit which is respectively electrically connected with a power supply management circuit and a light source, and a touch switch is close to the switch of the alternating light control circuit. A transmitting device and a receiving device of the multi-light-pen identification device are arranged at the same side of a writing screen or are respectively arranged at the two sides of the writing screen, wherein the transmitting device comprises a first pointing light pen and a second pointing light pen, and the first pointing light pen is an alternating point light pen; the receiving device comprises a camera and a signal processing circuit which are mutually and electrically connected, the lens of the camera aims at the normal of the screen, the signal processing circuit comprises an amplifying circuit, a high-speed comparing circuit and an identification control circuit which are sequentially connected in series, and the identification control circuit comprises a multi-light-pen identification module. The invention has the advantages that firstly, the alternating pointing light pen can be obtained only by increasing the alternating control circuit on the basis of the traditional direct current pointing light pen, thereby the alternating pointing light pen has simple structure; and secondly, the multi-light-pen identification device can quickly identify a plurality of light pens.

Description

technical field [0001] The invention relates to an AC pointing light pen, a multi-light pen recognition device and a multi-light pen recognition method, which can realize accurate distinction when multiple pointing light pens are used at the same time, and the multi-light pen recognition device and multi-light pen recognition method can be applied to multiple pointing pens In a system operated by multiple users at the same time, such as an interactive electronic whiteboard. Background technique [0002] Multi-light pen recognition technology is widely used in many fields. For example, in a large-screen interactive electronic whiteboard system used by multiple users, one of the key technologies is multi-light pen recognition. [0003] With the development of human-computer interaction technology, people pay more and more attention to multi-user operation, and more and more products support multi-user simultaneous operation. For example, in a large-screen command system, it i...

AI Technical Summary

Problems solved by technology

[0004] At this stage, there is no convenient and accurate multi-light pen recognition device, and the present invention fills up the technical vacancy in this respect

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