Method for mapping touch screen based on five points calibration

A mapping method and touch screen technology, applied in the input/output process of data processing, instruments, electrical and digital data processing, etc., can solve the problems of touch screen contact offset, inaccuracy, touch screen aging, offset click, etc., and achieve accurate coordinates , Solve the effect of inaccurate patch

Active Publication Date: 2009-01-21
WINGTECH COMM
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art, provide a method that can solve the contact offset caused by the inclination of the touch screen in the horizontal direc

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  • Method for mapping touch screen based on five points calibration
  • Method for mapping touch screen based on five points calibration
  • Method for mapping touch screen based on five points calibration

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Embodiment Construction

[0027] The process of mapping touch screen coordinates to LCD coordinates in the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention cannot be limited by this.

[0028] In this embodiment, the LCD screen of Dijing 1.8 is selected, and the width and height of the LCD are W LCD =128px and H LCD =160px, in order to improve calculation efficiency, the distance between the upper right, upper left, lower right, and lower left points and the edge is L=5px, that is, the preset coordinates of 5 points are (64, 80), (5, 5), (5 , 155), (123, 5), (123, 155), px means the unit is pixel.

[0029] please see Figure 4 , Figure 4 For the touch screen coordinate mapping area obtained after the touch screen in the mobile phone is calibrated by the present invention, this area is determined through the touch screen verification process, and is divided into four area...

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Abstract

The invention relates to a touch screen mapping method based on five point calibration, which uses dynamic ratio to calculate the mapping value from the touch screen coordinate and LCD coordinates according to the different coordinates on the touch screen, to compensate the deformation of trapezium and parallelogram, to resolve the deflection problem of touch points caused by the serious inclination at the horizontal and vertical directions of the touch screen, and uses the coordinates of five points to divide the screen into a plurality of mapping areas one-to-one, to realize accurate coordinates of the touch screen mapped to a LCD screen, to resolve the problem of inaccurate point caused by inaccurate pasting and aging of the touch screen, effectively reduces the problem of traditional algorisms which not consider the fine rotation of the four corner coordinates relative to the center coordinates, to cause the left and right inclination of horizontal strokes and the upper and lower inclination of vertical strokes and resolves the inaccurate point problem of small touch points of small LCD screens (128x160).

Description

technical field [0001] The invention relates to a touch screen mapping method, in particular to a touch screen mapping method based on 5-point calibration. Background technique [0002] Existing handheld devices such as mobile phones usually use LCD screens with touch screens to provide users with convenient and fast input methods. According to the working principle of the touch screen and the medium for transmitting information, the touch screen can be divided into four types, which are resistive, infrared, capacitive induction and surface acoustic wave. Since the resistive touch screen is generally used in mobile phones, the following is only for the resistance The structure and operation principle of the type touch screen are introduced. [0003] The screen part of the resistive touch screen is a multi-layer composite film that is very compatible with the surface of the display (usually an LCD screen). It consists of a layer of glass or plexiglass as the base layer, and ...

Claims

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Application Information

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IPC IPC(8): G06F3/041
Inventor 刘海科
Owner WINGTECH COMM
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