Back projection type multi-point touch positioning method

Abstract

The invention relates to a back projection type multi-point touch screen device based on SoC and a multi-point touch positioning method. The device comprises a back projection screen or a protection film (104), a multi-point touch control plate (103), a projector (102) and a plurality of active touch pens (105) and (106), wherein the multi-point touch control plate (103) is provided with a sensing SoC capable of detecting and tracking light points. The invention has the advantages that the multi-point touch screen device of the invention has the characteristics of simple and compact structure, convenient debugging and low cost; the functions of distinguishing the belonging users of each touch point or simulating the down pressing action of a left key or a right key of a cursor according to a work model of distinguishing multiple users or not distinguishing multiple users; because the identification function and the tracking function of the touch points are both completed by SoC, so the fault rate is low, the calculation of the position coordinates of the touch points is convenient, accurate and reliable; the touch resolution can be improved through the method of split joint of a plurality of SoCs; and the method can be conveniently used for rebuilding other back projection screens or back projection split joint walls so that the back projection screens or the back projection split joint walls have the multipoint touch function.

Description

technical field [0001] The invention relates to the field of human-computer interaction technology and multi-touch screen, in particular to a new type of human-computer interaction device using a sensor SoC, which can identify and track multiple touch points and support multi-user multi-user rear projection multi-touch screen. Background technique [0002] At present, touch screen technology has been widely used in various electronic devices. In the past two years, several multi-touch screen technologies have also emerged. With the development of human-computer interaction and 3D GIS and other technologies, the requirements for new human-computer interaction equipment are getting higher and higher. Multi-user collaboration on a single-machine platform raises the need for a multi-touch screen technology that supports distinguishing between multiple users. [0003] Most of the multi-touch screen technologies appeared after 2006. Except for Microsoft's surfacecomputer multi-t...

AI Technical Summary

Problems solved by technology

[0006] In addition, the multi-touch screen patent technologies mentioned above do not support distinguishing which user each touch point belongs to, so it cannot support multiple users to complete different operations with their own touch points on the same multi-point touch screen at the same time, and it is difficult to easily support a single user. Multi-user collaborative work on a touch screen; when doing a single touch, it cannot provide the function of simulating the right button of the cursor with an intuitive touch action like the electromagnetic induction single-point touch screen, but can only press and hold the same touch point for a few seconds. Simulate the right-click of the cursor, and cannot complete functions such as double-clicking the right-click of the cursor, such as the function of zooming out the map by using the double-click of the right-click of the cursor in Google Earth or NASA WorldWind

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