Touch panel device and multi-point touch locating method

Abstract

The utility model discloses a touch screen device and a positioning method for the multi-point touch. The infrared touch sensing circuits of the infrared components are distributed along the horizontal and the vertical directions, so as to constitute the infrared touch detection grid which is used to ascertain the possible positions of a plurality of the touch points in the detection area. The pick-up head apparatus is arranged at the position which is paralleled with the plane of the infrared touch examination grid, so that the entire detection area can be shot to ascertain the position of a plurality of the touch points in the detection area. The data computing element can respectively receive the data as obtained by the infrared touch sensing circuit and the pick-up head apparatus. After the comparative analysis, the accurate position coordinates of the defined touch points are transferred to the computer. The utility model has the advantages of simple structure and wide range of use, so that the touch screen device can realize the multi-point touch positioning as well as the single-point touch and the multi-point touch simultaneously. Therefore, the touch screen device can be used in more fields and occasions. Also, the multi-point positioning can be conveniently achieved and the calculation of the touch point position coordinates can achieve the convenience, the accuracy and the reliability.

Description

technical field [0001] The invention relates to a touch screen, in particular to a touch screen capable of distinguishing multiple touch points and operating simultaneously and a multi-point touch positioning method thereof. Background technique [0002] As a relatively simple and mature human-computer interaction device, touch screen has been widely used in many fields. Existing touch screen technologies mainly include resistance, capacitance, camera, infrared and other forms. As an interactive device with simple production process and low production cost, infrared touch screen has been developed rapidly. The basic structure of the infrared touch screen is to install several pairs of infrared emitting and infrared receiving elements in a certain order on the periphery of a display surface. These transmitting and infrared receiving elements form a transmitting and receiving pair in a one-to-one correspondence, forming a mutually perpendicular transmitting and receiving arra...

AI Technical Summary

Problems solved by technology

[0004] Due to the above reasons, the existing touch screen technology will fail in some occasions that need to use multi-touch, such as multiple people playing games at the same time, multiple people writing and drawing at the same time, etc., which greatly limits the field of use of the touch screen.

At present, there are some solutions, such as identifying multiple touch points by detecting the sequence of touch events, but it is easy to occur when there is no relative movement between multiple touch points, and there is no shape and size value of the touch point to refer to. Misjudgment

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