Touch screen calibrating method and system

Abstract

The invention provides a touch screen calibrating method which comprises the steps of switching the work state of a touch screen from the normal touch mode to the calibration mode, conducting regular calibration or deep calibration on a touch spot according to the touch precision change of the touch screen, and switching the work state of the touch screen from the calibration mode to the normal touch mode after the regular calibration or deep calibration is finished. The invention further discloses a touch screen calibrating system. According to the touch screen calibrating method and system, precision deterioration of the touch screen caused by transportation damage or using environment difference can be effectively amended, adaptive capacity is good, and manual operation errors can be removed effectively to realize higher precision.

Description

technical field [0001] The present invention relates to the field of touch technology, in particular to a calibration method and system for a touch screen. Background technique [0002] Since the touch screen and the display screen are not completely fixed and overlapped, the conversion relationship from the physical coordinates of the touch screen to the pixel coordinates of the display screen is not fixed. It is necessary to obtain the conversion relationship between them in order to make the touch point and the display point coincide accurately. This process is the calibration process of the touch screen. At the same time, the physical coordinates come from the information of the optical sensor, so precise conversion parameters of the optical sensor are required to ensure the accuracy of the physical coordinates of the touch screen. [0003] The existing touch screen calibration method has the following defects: [0004] (1) The calibration method uses touch and lift as...

AI Technical Summary

Problems solved by technology

[0004] (1) The calibration method uses touch and lift as mark points. It is difficult to touch the best position in an instant when manually collecting contacts, and it needs to be moved

Ordinary sampling points do not consider this problem, resulting in a decrease in accuracy

[0005] (2) The existing calibration methods do not have fast and easy-to-use optical sensor conversion parameters, and cannot be calibrated under the condition that the position of the optical sensor changes. After long-distance transportation or falling, the accuracy drop caused by small changes in the structure cannot be recovered through calibration

When the production place and the place of use are far away, the changes in thermal expansion and contraction of the structure caused by different climates will also cause the decrease in accuracy and cannot be recovered.

Images