Infrared touch screen with strong light irradiation resistance

Abstract

The invention discloses an infrared touch screen with strong light irradiation resistance. The circuit board comprises a rectangular circuit board, the plurality of infrared transmitting tubes and theplurality of infrared receiving tubes are arranged on the rectangular circuit board and are used for correspondingly transmitting and receiving; wherein the main control unit, the sampling circuit, the emission control circuit, the analog-to-digital conversion circuit and the receiving control circuit are arranged on the rectangular circuit board. The emission control circuit is electrically connected with the infrared emission tube; wherein the receiving control circuit is electrically connected with the infrared receiving tubes, the infrared receiving tubes, the sampling circuit and the analog-to-digital conversion circuit are electrically connected in sequence, the main control unit is electrically connected with the transmitting control circuit, the receiving control circuit and the analog-to-digital conversion circuit, the infrared transmitting tubes or the infrared receiving tubes on the same side are arranged on the rectangular circuit board at oblique angles, and every two infrared transmitting tubes or infrared receiving tubes are mirror images. By the adoption of the technical scheme, when sunlight can only irradiate the lamps at the angles which are mirror images of oneanother, the lamps at one angle cannot irradiate the lamps at the same time, and therefore the touch precision can still meet the touch requirement under the limit condition.

Description

technical field [0001] The invention relates to an infrared touch screen device, in particular to an infrared touch screen capable of resisting strong light interference. Background technique [0002] It is the development trend of digital information products to replace inconvenient with convenience and complex human-computer interaction with simplicity. With the high popularity of computers and the continuous improvement of users' requirements for human-computer interaction technology, touch technology has emerged as the times require, and gradually forms a brand-new industry. Because infrared touch screen technology, infrared touch screen is not affected by current, voltage and static electricity, and is suitable for harsh environmental conditions, experts and industry insiders agree that the combination of infrared touch technology and display is the ultimate development trend of touch products, because infrared touch screen is an optical touch screen , so it needs to h...

AI Technical Summary

Problems solved by technology

When this design is exposed to strong sunlight, one side may not be able to judge the light source and be "illuminated". When one side is "illuminated", only one axis can calculate the coordinates, and there will also be a problem of large calculation errors.

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