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A method for recognizing the movement direction of a touch screen touch track

A technology of touch track and motion direction, which is applied in the input/output process of data processing, instruments, electrical digital data processing, etc. It can solve the problems of touch screen touch accuracy reduction and easy rollback, etc., to achieve reasonable design and small amount of calculation , easy-to-achieve effects

Inactive Publication Date: 2017-12-15
BEIJING UNITOP NEW TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is the technical problem that in the prior art, due to the influence of various factors, during the movement of the touch point, the movement direction of the identified touch track tends to back off, resulting in a decrease in the touch accuracy of the touch screen, thereby providing a Method for recognizing the movement direction of a touch track on a touch screen that can restore real touch tracks and improve touch accuracy

Method used

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  • A method for recognizing the movement direction of a touch screen touch track

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Embodiment 1

[0034] This embodiment provides a flow chart of a method for identifying the movement direction of a touch track on a touch screen, as figure 1 As shown, it includes the following steps:

[0035] S1 collects multiple frames of scan data of the touch screen, and outputs touch trajectories according to the collected multiple frames of scan data. The touch points on a touch trajectory are separated by a preset distance L 0 The touch points are selected and the coordinates of the selected touch points are stored in the buffer in a stack in a sequence. The preset separation distance L 0 The value is 2mm≤L 0 ≤4mm, the factors affecting the infrared light density of the infrared touch screen include the lamp distance between each infrared emitting tube and the infrared receiving tube, the scanning method of infrared light, product grade, product accuracy, etc. The above factors are technology in the art Factors that affect the intensity of infrared light well known to persons. In this...

Embodiment 2

[0051] As a preferred embodiment, this embodiment provides a flow chart of a method for recognizing the movement direction of a touch track on a touch screen as follows: figure 1 As shown, it includes the following steps:

[0052] S1: Collect multi-frame scan data of the touch screen, and output a touch trajectory according to the collected multi-frame scan data. The touch points on a touch trajectory are separated by a preset distance L 0 The touch points are selected and the coordinates of the selected touch points are stored in the buffer in a stack in a sequence. Among them, the preset interval distance L 0 It is 3mm.

[0053] S2: When the number of touch points stored in the buffer is equal to 50, scan the collected point A(X) for the current frame on the touch track A ,Y A ), calculate the point A(X A ,Y A ) And the point B (X B ,Y B ) Displacement vector

[0054] S3: Find the point C(X C , Y C ), calculate the point B(X B ,Y B ) And the point C(X C , Y C ) Displacement vect...

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Abstract

The method for identifying the moving direction of a touch track on a touch screen according to the present invention comprises the steps of: selecting a touch point on a track according to a preset interval distance L0 and storing them in a buffer in a sequential manner; scanning and collecting the current frame on the touch track Point A, calculate the displacement vector from point B to point A that is last stored in the buffer in the buffer; find point C from the buffer that is closest to the preset interval distance L1 from point B, and calculate the displacement between point B and point C Vector; Calculate the angle θ between the displacement vector from point B to point A and the displacement vector from point C to point B, compare the size of θ and θ0, if θ≤θ0, point A does not fall back, and output the coordinates of point A; otherwise, After correction, the coordinates of point A are output until all the touch points of the touch track are identified. The above method effectively avoids the technical problem that, due to various factors, during the touch process, the movement direction of the identified touch track tends to fall back, resulting in a decrease in the touch accuracy of the touch screen.

Description

Technical field [0001] The invention relates to a method for identifying the movement direction of a touch track of a touch screen, and belongs to the technical field of touch control. Background technique [0002] With the development of touch technology, touch screens have been widely used as a simple and convenient human-computer interaction device. At present, the types of touch screens mainly include resistive touch screens, capacitive touch screens, surface acoustic wave touch screens, optical touch screens and infrared touch screens. In various applications of touch control technology, users often hope that the computer can understand various touch operations of the user, so that it can understand the user's intention and quickly respond accordingly, thereby providing users with more convenient and intelligent services. It is a common touch operation for the user to slide a touch object such as a finger or stylus on the touch detection surface. In this case, the computer ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/041G06F3/042
Inventor 满庆奎郭洪峰刘新斌管健
Owner BEIJING UNITOP NEW TECH CO LTD