Infrared touch vision display realizes interactive recognition through non-contact optical sensor matrix, and its working logic relies on the cross-scanning network composed of infrared transmitting and receiving elements deployed at the edge of the screen. The positioning accuracy of touch events depends on the coordinate solution algorithm when the invisible light screen is blocked. This mechanism has a low-level technology generation gap with the capacitive touch control commonly used in mobile terminals. The physical isolation characteristics make the infrared solution not rely on direct contact with the conductive medium, reducing the sensitivity to the material properties of the operated object.
Infrared touch vision display relies on the detection of microscopic changes in surface charge distribution, requiring the operating body to have a specific dielectric constant to change the electric field distribution. The response mechanism of the infrared system is not absolutely limited by the transmittance of the screen surface material or the covering, allowing the functional integrity to be maintained in the presence of protective glass or special film. The ability to suppress ambient light interference shows opposite trends in the two technologies. Strong direct light may affect the signal stability of the infrared receiver, while the capacitive solution is more susceptible to electromagnetic field disturbances.
The sensor module of infrared touch vision display is physically separated from the display unit, which has a natural redundancy advantage in dealing with mechanical damage or scratches on the screen surface. The sensing layer of the capacitive system is highly integrated with the display module, and local damage may cause regional failure of the touch function. There are also differences in the implementation of multi-touch. The infrared system achieves parallel coordinate tracking by increasing the scanning frequency, while the capacitive solution relies on a higher density electrode grid for signal acquisition.
The continuous scanning mode of the infrared touch vision display generates fixed power consumption in static scenes, while the capacitive system reduces energy consumption through intermittent refresh. In extreme temperature or humidity environments, the performance attenuation curve of the infrared component and the electrolyte stability of the capacitive sensor show different aging characteristics. The preference for industrial application scenarios reflects the trade-off between the two technologies in terms of anti-pollution ability and maintenance costs. This difference promotes the continuous differentiation of touch technology into specialized application scenarios.
