Multi-point touch identification method and device

Abstract

The invention provides a multi-point touch identification method which comprises the following steps: (1) calculating the coordinates of the intersection point of the center line of blocking lines on the longitudinal and transverse directions according to infrared scanned data on the longitudinal and transverse directions of a touch screen; (2) calculating the width of an oblique blocking line according to the oblique infrared scanned data of the touch screen; and (3) judging the coordinates of a touch point according to the coordinates of the intersection point and the width of the oblique blocking line. The invention also provides a multi-point touch identification device. By utilizing the technology provided by the invention, the coordinates of the touched object are correctly judged, and the identification accuracy of the touch point is improved; and moreover, the data processing capacity is small, the operation process is simple, the touch response speed is greatly increased, thecoordinates of the touch point can be calculated on a bottom layer, and the cost of multi-point touch identification is lowered.

Description

technical field [0001] The invention relates to touch screen technology, in particular to a multi-point touch recognition method and device. Background technique [0002] The emergence of touch technology has brought great convenience to people, especially the application of multi-touch technology has brought a qualitative leap in touch experience. [0003] At present, the multi-touch recognition method mainly adds one or more scans in the oblique direction on the basis of scanning in the vertical and horizontal directions, and obtains multi-dimensional occlusion information by vertical scanning and oblique scanning. Find the coordinates of the touch point at the intersection point of the midline, which can easily lead to misjudgments, such as figure 1 As shown, there are three scanning directions, but the intersecting points A, B, and C of the midlines R1, R2, and R3 of the shielding width line are all intersections of the midlines of the two shielding lines. At this time,...

AI Technical Summary

Problems solved by technology

[0003] At present, the multi-touch recognition method mainly adds one or more scans in the oblique direction on the basis of scanning in the vertical and horizontal directions, and obtains multi-dimensional occlusion information by vertical scanning and oblique scanning. Find the coordinates of the touch point at the intersection point of the midline, which can easily lead to misjudgments, such as figure 1 As shown, there are three scanning directions, but the intersecting points A, B, and C of the midlines R1, R2, and R3 of the shielding width line are all intersections of the midlines of the two shielding lines. At this time, the coordinate position of the touching object cannot be correctly judged. With the increase of touch points, the amount of calculation will increase exponentially, and the calculation speed will also slow down

[0004] In addition, in order to avoid the above-mentioned problem that the coordinate position of the touch object cannot be correctly judged, there is a technology that forms color lines of different colors with corresponding widths from the occlusion width lines of different angles, and then reads the color value of the intersection point of the color lines, Judging whether it is a touch point and calculating the coordinates of the touch point, but the technology needs to process a large amount of data and the calculation process is complicated, which greatly affects the touch response speed, and the data processing must be completed by the upper computer, and the touch point cannot be calculated at the bottom layer coordinate

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