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A multi-point portable optical touch screen and its positioning method

An optical touch screen, portable technology, applied in the field of computer vision and human-computer interaction, can solve the problems of high price, high price, large size, etc., and achieve the effect of convenient maintenance and replacement, light and space-consuming, and good expandability

Inactive Publication Date: 2016-03-02
狒特科技(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the resistive touch screen is cheap, the outer film is easily scratched and the touch screen is unusable, and the multi-layer structure will cause a lot of light loss
Capacitive screen is currently the most popular touch screen. Its disadvantages are: it is easy to cause misoperation in wet weather; it can only be touched by hand or a special touch pen; it is prone to drift; it is expensive and not suitable for making large-area touch screens.
The optical multi-touch screen represented by Surface is bulky and expensive
The infrared touch screen has the disadvantages that it is difficult to realize multi-touch and unstable under lighting conditions

Method used

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  • A multi-point portable optical touch screen and its positioning method
  • A multi-point portable optical touch screen and its positioning method
  • A multi-point portable optical touch screen and its positioning method

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Embodiment Construction

[0065] figure 1 The detailed structure of the image acquisition device and the image processing chip 2 in one embodiment are shown. The image acquisition device includes a camera 11, a curved mirror 12, and a housing bracket 13, all of which are independent structures. The curved surface of the curved reflector 12 is a curved surface of revolution, for example, a paraboloid of revolution or a hemispherical surface, and a hemispherical reflector is used as an example in the figure. The optical axis GW of the camera 11 coincides with the rotation axis HM of the curved mirror 13, the image processing chip and the image acquisition device are in a one-to-one relationship, and the image processing chip only processes the image collected by its corresponding image acquisition device, so the image The processing chip can be placed in the image acquisition device.

[0066] Since the height WM of the camera 11 needs to ensure that the camera can capture a 360-degree image above the t...

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Abstract

The invention provides a multipoint portable optical touch screen which comprises an image acquisition device, image processing chips, a processor, a touch ring and an edge frame, wherein the image acquisition device is used for acquiring an image above a touch surface; each image processing chip is used for processing the image, identifying a touch object and calculating relevant information of the object; the processor is used for correcting a touch screen, processing information provided by two or more image processing chips, calculating a touch point and subsequently transmitting touch point information to upper computer software; the touch ring is an annular object which can emit light, is sleeved on a finger or the top end of another touch object in special situations and is used for improving the touch quality; and the edge frame is a foldable outer frame, and is used for limiting the acquisition range of the image acquisition device in special situations, and preventing a moving object outside the touch surface from interfering the normal touch operation. By utilizing the multipoint portable optical touch screen, the problem of ghost focus is effectively solved, and the multipoint portable optical touch screen has the advantages of being low in cost, portable, easy to use, easy to maintain and easy to expand, and the like, thus being applied to multiple situations, and the like; and the sensing range of the touch screen can be adjusted in software.

Description

technical field [0001] The invention relates to computer vision and human-computer interaction technology, in particular to a multi-point portable optical touch screen and a positioning method thereof. Background technique [0002] The touch screen has a more friendly and intuitive human-computer interaction interface than traditional input devices, so it is gradually replacing traditional input devices. [0003] Traditional touch screens include capacitive and resistive touch screens. Although the resistive touch screen is cheap, the outer film is easily scratched, making the touch screen unusable, and the multi-layer structure will cause a lot of light loss. Capacitive screen is currently the most popular touch screen. Its disadvantages are: it is easy to cause misoperation in wet weather; it can only be touched by hand or a special touch pen; it is prone to drift; it is expensive and not suitable for making large-area touch screens. [0004] Optical touch screens have g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/042
Inventor 周恺弟郑晓萌
Owner 狒特科技(北京)有限公司
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