Infrared touch screen and multi-touch positioning method thereof
An infrared touch screen and touch screen technology, applied in the direction of instruments, electrical digital data processing, data processing input/output process, etc., can solve the problem of inability to multi-touch, inability to distinguish multi-touch coordinate points, and single-point touch screen hardware structure Invariant and other problems, to achieve the effect of wide applicability and high reliability
Active Publication Date: 2014-06-11
中航华东光电有限公司
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Problems solved by technology
However, most of the multi-point infrared touch screens now keep the hardware structure of the single-point touch screen unchanged, and use the method of writing and scanning to eliminate false points to realize the recognition of multi-point touches. This method cannot really distinguish the real coordinate points of multi-point touches. In principle, it is not possible to truly realize multi-touch
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[0021] The specific implementation manner of the present invention will be described in further detail below by describing the best embodiment with reference to the accompanying drawings.
[0022] Such as figure 1 As shown, the infrared light touch screen includes a touch screen body, and infrared light emitting devices are arranged on two adjacent sides of the touch screen body, TH1, TH2, ..., TH17, TH18, TV1, TV2, ..., TV15, TV16; install the infrared light receiving device on the other adjacent side of the touch screen body at the position facing the infrared light emitting device, RH1, RH2,..., RH17, RH18, RV1, RV2,..., RV15, RV16, while installing The reflected light infrared receiving device is installed on the side of the infrared emitting device, HFR1, HFR2,..., HFR16, HFR17, VFR1, VFR2,..., VFR14, HFR15, these reflected light infrared receiving devices are arranged at intervals with the infrared emitting device, and reflect The distance from the optical infrared rece...
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The invention discloses an infrared touch screen and a multi-touch positioning method thereof. The infrared touch screen comprises a touch screen body. Two adjacent edges of the touch screen body are provided with infrared transmitting devices. The other two adjacent edges of the touch screen body are provided with infrared receiving devices. The two adjacent edges on the touch screen body, which are provided with the infrared transmitting devices, are provided with reflected light infrared receiving devices for receiving infrared light reflected by a touch object. The reflected light infrared receiving devices and the infrared transmitting devices are arranged at intervals. The distance from each reflected light infrared receiving device to the edge of the touch screen body is shorter than the distance from the corresponding infrared transmitting device to the edge of the touch screen body. The multi-touch positioning method of the infrared touch screen comprises six steps. In the invention, the strength of the light reflected by the touch object is utilized to really distinguish the position of the actual touch object and the multi-touch positioning of the infrared touch screen is really realized. The invention has the advantages of high reliability and wide application range.
Description
technical field [0001] The invention relates to a touch screen, in particular to an infrared touch screen and a multi-touch positioning method thereof. Background technique [0002] As a branch of touch screen, infrared touch screen is gradually widely used in various fields due to its advantages of convenient use, strong anti-knock performance, high light transmittance, and high reliability. After more than 20 years of development, single-point infrared touch screen technology has become increasingly mature, and its recognition accuracy, anti-strong light interference and other technologies have made major breakthroughs, and its stability and reliability have been greatly improved. With the advancement of computer technology, people's needs are increasing. More and more, people are no longer satisfied with single-touch, but put forward the demand for multi-touch with stronger functions and more convenient use, so as to complete functions such as zooming in and out, rotating...
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IPC IPC(8): G06F3/042
Inventor 郎立国康涛沈威涂娟
Owner 中航华东光电有限公司