Touch area identification method and system of infrared touch screen and electronic equipment

Abstract

The invention discloses a touch area identification method and system of an infrared touch screen, electronic equipment and a medium, and the method comprises the following steps: obtaining all shielding lines; selecting a shielding line which is not selected as a first shielding line, determining all cross points of the first shielding line, determining a focus of the first shielding line, and repeating the operation until the focuses of all the shielding lines are obtained; and selecting the focus which belongs to the shielding lines at the same time and has the largest number as a common focus, obtaining other focuses in an adjacent area of the common focus, determining a touch area according to the other focuses and the common focus, and repeating the operation on the remaining focuses of which the touch areas are not determined until all the touch areas are obtained. According to the method, the calculation efficiency and accuracy of touch area recognition can be effectively improved.

Description

technical field [0001] The present invention relates to the field of touch technology, in particular to a method, system, electronic device and computer-readable storage medium for identifying a touch area of ​​an infrared touch screen. Background technique [0002] Infrared touch screens usually include a number of infrared emitting units and a number of infrared receiving units and their driving circuits installed on the surrounding borders of the touch screen. Under the action of the driving circuit, each infrared emitting unit will Infrared rays are emitted, and each infrared receiving unit receives corresponding infrared rays, thereby forming an infrared light network on the screen surface of the touch screen. When a touch-operated object (such as a finger) touches the surface of the screen, some infrared rays in the infrared light network will be blocked, and the blocked infrared rays are the blocking lines. The infrared light received by the infrared receiving unit co...

AI Technical Summary

Problems solved by technology

Most of the existing multi-touch touch area recognition methods select the area where several occlusion lines intersect as the touch area, but in fact, due to the existence of multiple infrared light path directions, some occlusion lines will cross when there are multiple touch points. The area is not the real touch area, so it is necessary to extract the intersection area exceeding a certain number of occlusion lines as the touch area by setting the threshold threshold. In this way, larger contacts can be extracted, while smaller contacts (such as thin pen) due to the small number of intersecting occlusion lines, they cannot be extracted at the same time as the larger contacts. After extracting the larger contacts, it is necessary to judge whether all the occlusion lines have passed through the larger contacts, such as If there are still some occlusion lines that do not pass through the larger touch points, the smaller touch points can only be extracted by readjusting the threshold. Point recognition is less computationally efficient

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