Interactive flat panel display is a digital interactive terminal that integrates touch sensing and display functions. Its core feature is to achieve direct physical operation of the human-computer interface. This technology ensures the accuracy and naturalness of the writing experience through multiple hardware collaboration.
The surface of the interactive flat panel display is covered with a capacitive or infrared sensor matrix, which detects the contact position through electric field changes or light path blocking. Active pen technology introduces electromagnetic resonance signals to achieve hovering sensing and pressure feedback. The touch sampling frequency determines the continuity of the handwriting, and the path prediction algorithm compensates for the signal delay phenomenon. Passive touch relies on physical contact area positioning, and the pen tip accuracy is limited.
A micro-textured hardened coating is applied to the screen surface, and the friction coefficient is optimized to balance the writing damping and pen tip wear resistance. The response speed of the liquid crystal layer matches the touch sampling cycle to eliminate the handwriting smear phenomenon. However, ordinary touch screens sacrifice coordinate accuracy to reduce the false touch rate, making it difficult to achieve fine stroke restoration.
Layered touch can separate finger and pen shape signals, and the palm suppression algorithm filters body contact interference. The handwriting rendering engine dynamically adjusts the line thickness based on pressure data to simulate the real ink diffusion effect. The formula recognition function in the education scenario relies on trajectory feature analysis and is directly related to the underlying touch performance.
