A kind of identification method of infrared touch screen touch point

Abstract

The invention discloses a method for identifying a touch point on an infrared touch screen, which includes the following steps: a. Sending a control signal to the slave microcontroller through the master microcontroller, so that when the master microcontroller controls the X-axis infrared emitting unit to scan, The slave microcontroller also simultaneously controls the Y-axis infrared emitting unit to scan; b, when the slave microcontroller drives the Y-axis infrared emitter unit to complete a scan, the slave microcontroller transmits the scanning information on the Y-axis to the main microcontroller After the main microcontroller drives the X-axis infrared emitting unit to complete a scan, the main microcontroller obtains the scanning information on the X-axis; c, the main microcontroller performs scanning information on the X-axis and the scanning information on the Y-axis Identification, after the identification is completed, the master microcontroller sends a control signal to the slave microcontroller again to start the next scan. The present invention achieves the purpose of quickly confirming the coordinates of the touch point by simultaneously controlling the X-axis infrared emitting unit and the Y-axis infrared emitting unit to scan.

Description

technical field [0001] The invention relates to a touch screen, in particular to a method for identifying touch points of an infrared touch screen. Background technique [0002] In the prior art, an infrared touch screen is mainly composed of a microcontroller, a light guide column, a touch screen body, an X-axis infrared emitting unit, an X-axis infrared receiving unit, a Y-axis infrared emitting unit, a Y-axis infrared receiving unit and an infrared emitting circuit. For example, Chinese Patent No. "201220662044.7" disclosed an infrared touch screen on June 19, 2013. The technical solution is that the infrared touch screen includes a touch screen body, a light guide column, and a circuit board. The receiving tube, the touch screen body is located above the platform of the light guide column, the circuit board is located below the platform of the light guide column, and the infrared emitting tube and the infrared receiving tube on the circuit board are located inside the pl...

AI Technical Summary

Problems solved by technology

[0003] In the actual use process, the prior art represented by the above-mentioned patent documents all use a single microcontroller to control the X-axis infrared emission tube and the Y-axis infrared emission tube to emit infrared rays sequentially during work, that is, to wait for the X-axis infrared emission tube to emit infrared light. After the infrared emission tubes in the emission unit are scanned in sequence, the infrared emission tubes in the Y-axis infrared emission unit are controlled to scan in sequence; however, with the development of society and the advancement of infrared touch technology, more and more industries are applicable to infrared touch screens. The size of the infrared touch screen is also getting larger and larger. The structure that a single microcontroller controls the X-axis and Y-axis infrared emitting tubes to emit infrared rays sequentially will lead to an increase in the single scan time of the infrared touch screen, especially for infrared touch screens with a size larger than 42 inches. It is said that this will cause defects such as touch delay and line breakage on the infrared touch screen, which will seriously reduce the touch accuracy of the infrared touch screen.

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