Intelligent dead point recognition and self-adaptation compensation method for infrared touch screen

Abstract

The invention relates to an automatic fault detection and compensation method for an infrared touch screen, in particular to an intelligent dead point recognition and self-adaptation compensation method used for conducting recognition and self-adaption compensation on dead points caused due to the fact that infrared transmitting tubes and infrared receiving tubes in the infrared touch screen are damaged or foreign bodies enter a touch area, and accordingly shielding is caused. According to the intelligent dead point recognition and self-adaptation compensation method for the infrared touch screen, the dead points (including those caused by infrared damage or foreign body shielding) of the touch screen can be recognized in real time, and self-adaptation compensation measures are taken, so that it is guaranteed that the infrared touch screen can still work at a normal resolution when the dead points exist, stability of the infrared touch screen is improved, and the service life of the infrared touch screen is prolonged. Besides, the normal work state of the infrared touch screen can be restored in real time after the dead points are repaired or the foreign bodies are removed.

Description

technical field [0001] The invention relates to an automatic fault detection and compensation method for an infrared touch screen, in particular to intelligent identification and self-adaptive compensation for touch dead spots in the infrared touch screen caused by damage to infrared emitting tubes and infrared receiving tubes or obstruction caused by foreign matter entering the touch area. Background technique [0002] With the further improvement of the demand for human-computer interaction, the application of touch screen technology is becoming more and more extensive. The touch screen is intuitive and flexible, which can provide a more friendly user interface and make the operation more convenient and quick. According to the different technologies used, touch screens can be divided into infrared touch screens, resistive touch screens, capacitive touch screens, surface acoustic wave touch screens, etc. Among them, the infrared touch screen using infrared technology is th...

AI Technical Summary

Problems solved by technology

[0006] Among them, CN101369201A only proposes a method of judging the faulty tube by the voltage value of the infrared receiving tube. This method cannot determine whether the infrared transmitting tube is damaged or the infrared receiving tube is damaged, and when there is continuous touch or foreign matter blocking, this method will not be able to determine whether the faulty tube is damaged or not. Normal touch or faulty tube; the fault self-check circuit proposed by CN203117378U can quickly detect whether the infrared emitting tube is damaged or the infrared receiving tube is damaged, and can prevent the normal touch from being misjudged as a faulty tube, but the infrared touch screen needs to be changed to the hardware , the installation of an array of infrared emission tubes controlled separately will increase the cost and will increase the frame size of the infrared touch screen and the difficulty of hardware circuit design and software design to a certain extent; the method for eliminating abnormal contact interference proposed by CN102662533A performs abnormal Normal contact detection and shielding of abnormal contact areas, other touch areas can be used normally

However, in the normal operation of the infrared touch screen, a foreign object suddenly entering the touch area will not be detected, and when the abnormally contacted foreign object moves away from the touch area, the shielding cannot be canceled in real time, and it can only be judged and shielded when it is turned on again.

In addition to the above-mentioned shortcomings, none of the above three patents mentioned how to perform real-time adaptive compensation after the failure tube is determined, so that the infrared touch screen can ensure the accuracy and resolution and continue to work normally, so as to ensure the touch screen when the touch dead point occurs. High precision and resolution, improve the working stability of the infrared touch screen, prolong its service life

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