Calibration method of touch display screen

Abstract

The invention discloses a calibration method of a touch display screen. The method comprises the following steps of a. setting at least two calibration areas on the display screen, and setting at least three preset points in each calibration area; b. using a touch body with a camera shooting function to click the calibration areas on the display screen one by one to obtain the coordinate of the touch body on a touch screen; c. imaging the preset points covered by the touch body and the click positions of the touch body, returning the imaging result back into a calibration controller, and calculating by the calibration controller to obtain the coordinate of the touch body on the display screen; d. using the calibration controller to obtain the calibration parameters according to the coordinate of the touch body on the display screen and the coordinate of the touch body on the touch screen; e. storing the obtained calibration parameters in the controller, and establishing a one-one mapping relationship between the coordinate of the touch body on the touch screen and the coordinate of the touch body on the display screen according to the calibration parameters to complete calibration. The calibration method can rapidly and accurately complete the calibration process, thus simplifying the calibration working procedures and improving the calibration efficiency and the calibration accuracy.

Description

technical field [0001] The invention relates to the technical field of touch screens, in particular to a calibration method for a touch screen. Background technique [0002] The touch display screen includes a touch screen and a display screen. Among them, the touch screen includes a touch detection part, which is used to detect the user's touch position, and is installed in front of the display screen. The display screen is only used to display information, and the information is provided to the customer under the control of the controller. information to operate the touch screen. [0003] Due to the installation error and equipment quality error in the process of installing the touch screen in front of the display screen, this makes the touch screen and the display screen cannot be completely overlapped in the horizontal and vertical directions, that is, the touch screen and the display screen are in different plane coordinate systems. , and the coordinate system of the ...

AI Technical Summary

Problems solved by technology

[0006] However, the existing technology represented by the above-mentioned patent documents still has the following defects in the actual use process: 1. When calibrating, it is necessary to calibrate the controller to control the mechanical arm to drive the touch pen to click the preset point. Using this high-precision calibration Fixtures have the disadvantages of being expensive, not suitable for large-scale production and difficult to maintain; 2. During calibration, the touch pen needs to accurately click the preset point, but there is a mechanical error in the process of clicking with the touch pen and the calibration controller, not only The calibration process is complicated, and there are also defects of poor calibration effect and low calibration efficiency

However, using the above-mentioned patented technology to calibrate the touch screen still has the disadvantages of high calibration cost, low calibration efficiency and poor calibration effect, which is not conducive to customers to seize the market

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