Multipoint infrared touch screen and touch positioning method thereof

A touch screen, infrared technology, applied in the input/output process of instruments, electrical digital data processing, data processing, etc., can solve the problem of uneven infrared coverage and scan dead spots, and achieve the effect of accurate position

Inactive Publication Date: 2011-03-30
厦门信烨联动传媒有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-point infrared touch screen with uniform coverage of infrared rays and no scanni

Method used

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  • Multipoint infrared touch screen and touch positioning method thereof
  • Multipoint infrared touch screen and touch positioning method thereof
  • Multipoint infrared touch screen and touch positioning method thereof

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Embodiment Construction

[0044] Combine the following Figure 1-Figure 13 The present invention is further described.

[0045] Such as figure 1 Infrared receiving units 201, 202, 203, 204 and infrared emitting units 101, 102, 103, 104 are arranged in a certain order on the border around the surface of the multi-point infrared touch screen to form a vertical corresponding relationship.

[0046] The same number of infrared emitting units 101 and infrared receiving units 201 are arranged on the upper frame at the same time, and the upper frame is divided into the same two equal parts, one of which is the infrared emitting unit 101, the other is the infrared receiving unit 201, and the lower The frame corresponds to an infrared receiving unit 203 and an infrared emitting unit 103 , the receiving unit 203 corresponds to the emitting unit 101 , and the receiving unit 201 corresponds to the emitting unit 103 . The same number of infrared emitting units 104 and infrared receiving units 204 are simultaneousl...

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Abstract

The invention relates to a multipoint infrared touch screen. A plurality of infrared receiving units and infrared emission units are arranged on frames around the display surface of the multipoint infrared touch screen according to a certain sequence so as to form a vertically corresponding relation. The method for implementing the positioning of multipoint touch comprises the following steps of: starting the emission units on two opposite frames and finishing normalization of the receiving units; judging whether the touch screen generates touch deflection or not; switching the infrared emission units and three infrared receiving units corresponding to the emission units on in turn, and storing all values of a scanning receiving unit; reading a scanning value vertical to the scanning receiving unit, and comparing the scanning value with a normalized value; judging whether a touch point can be determined or not; further judging a possible touch point which is not accurately judged by using an infrared scanning record value which has a negative 45-degrees inclination angle; further judging uncertain individual touch points which are not accurately judged in the preceding step by using an infrared scanning record value which has a positive 45-degrees inclination angle; and finishing one scanning judgment cycle, and repeatedly starting a new cycle of multipoint touch judgment. The method has the advantages of uniform infrared coverage, clear inclination angle and no scanning dead angle.

Description

technical field [0001] The invention relates to a multi-point infrared touch screen, in particular to a multi-point infrared touch screen capable of accurately judging multiple simultaneously operated touch points and a touch positioning method thereof. Background technique [0002] At present, with the improvement of the economic level and the continuous breakthrough of science and technology, the demand for multi-point infrared touch screens from all walks of life is also increasing. The development of multi-touch technology is bound to promote the development of other industries. Multi-point infrared touch screen, as a new means of simulating ordinary mouse and keyboard to realize human-device interaction, is widely used in mobile phones, telecommunication inquiry, conference display, etc. The infrared-based multi-point touch screen can be said to be a touch interaction device with simple production process and low cost. [0003] Application No. 200710028616.X and Publi...

Claims

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Application Information

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IPC IPC(8): G06F3/042
Inventor 柳景
Owner 厦门信烨联动传媒有限公司
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