Optical touch system and method for determining positions of objects using the same

Abstract

The invention provides an optical touch system and a method for determining the positions of objects using the same. The optical touch system at least includes a depth image sensor and a touch plane, the depth image sensor having a sensing area covering the touch plane. First, when an object is detected by the depth image sensor, image information is obtained by using the depth image sensor, wherein the image information includes angle information and depth information related to the depth image sensor for the object. Thereafter, it is determined whether a position of the object is located at the inside or the outside of the touch plane according to the angle information and the depth information. The optical touch system and the method for determining positions of objects of the present invention can utilize depth information provided by the depth image sensor and matched with simple side limits, thereby without side bar technique can be achieved, so, its touch plane has no need to be installed with additional side bars, thus reducing cost and making product assembling more easier. Moreover, side bars are not needed for the touch plane, and thus free of side bar shed or distorted problems.

Description

technical field [0001] The present invention relates to an optical touch system and a method for judging the position of an object thereof, in particular to an optical touch system applicable to a touch plane without side bars and a method for judging the position of an object thereof. Background technique [0002] In recent years, since more and more devices can use touch input operation instructions, in some electronic devices, such as smart phones (smart phones), personal digital assistants (PDAs), tablet computers (Tablet PCs) or ultra-portable computers ( UMPC, Ultra Mobile PC, etc., are all equipped with a touch screen that can be directly touched, and can be used as a main input device in a touch operation mode. The touch display device incorporates an optical touch system with a touch surface including at least one-dimensional sensors for detecting contact and movement of objects such as fingers or stylus on the surface. Currently, there are two common types of opti...

AI Technical Summary

Problems solved by technology

[0003] However, the aforementioned two optical touch systems must use side bars, which not only increases the cost, but also increases the complexity of assembly

Furthermore, the edge fixing technology is mostly glued to the touch surface at present, so it is easy to cause the problem of edge falling or skewing, which affects the judgment of the position of the object

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