With the change of time, the application of LCD TFT touch screen in the market has shown diversification. Touch screens with different technologies are adapted to different application environments, and infrared touch technology is only one of them, but it also has its own advantages and disadvantages. point. People in the industry are very fond of the advantages of infrared touch technology, and they are also very clear about its shortcomings, and have made unremitting efforts to improve it. So far, infrared touch technology has entered the fifth generation. Judging from some of its characteristics, it is very likely to stand out from various touch technologies and become a trend-setter TFT LCD module in the touch screen market.
The earlier infrared touch screen started in 1992 with a resolution of only 32×32. The first generation of infrared touch technology has low resolution, is prone to malfunction due to environmental interference, and is required to be used in a certain shading environment. Due to these limitations, the infrared touch screen once faded out of the market.
The second-generation infrared touch screen was launched in 1994, with a resolution of 64×64, improved anti-light interference performance, and can adapt to most indoor environments. The third-generation infrared touch screen was launched in 1997, with a resolution of 320 × 240, which can be used in an outdoor environment without direct sunlight; the main contribution of the fourth-generation infrared touch screen is to improve the resolution, reaching 800 × 600, in 1998 roll out. Judging from the development history of infrared touch screen, the main progress is in two aspects: improving resolution and adapting to strong light interference environment, but basically it has not overcome the problems of short product life and easy drift of device characteristic parameters.
The recently launched fifth-generation infrared touch technology not only increases the resolution to 1000×720, but also improves the anti-strong light interference performance so that it can also be used in direct sunlight. More importantly, it has essential features in product life and maintenance-free performance. leap. The fifth-generation infrared touch adopts the guiding ideology of the redundancy distribution of probability function devices, and the lifespan is greater than 7 years in the working environment. That said, when the accompanying monitor reaches the end of its life, the touchscreen itself is still functional.
The improvement in performance indicators of the fifth-generation infrared touch screen is enough to push the application of touch screen to a new level. What used to be unusable in some occasions can now be used. For example, in the past, when the touch screen tracked the movement of the finger, there were many broken strokes, which could not be used for Chinese character recognition. The fifth-generation touch screen can meet the requirements of accuracy, smoothness and tracking speed when tracking the movement of the finger. The user's writing can be converted into an image trajectory very smoothly, and the input of handwriting recognition is fully supported.
The sixth-generation touch screen of LCD Display supports multi-touch to meet the requirements of Windows 7 system.
Infrared touch screen
2022 04/26