Electromagnetic Actuation

A method of producing physical movement using electromagnetic fields generated by electric coils. In accessibility contexts, electromagnetic actuation is used to move tactile elements — such as magnetic markers or braille pins — to create dynamic tactile displays and interfaces for people with visual impairments. Compared to mechanical or piezoelectric actuation methods, electromagnetic actuation using printed circuit board (PCB) manufactured coil arrays offers advantages in cost, scalability, and fabrication simplicity, making it a promising approach for creating affordable large-format dynamic tactile graphics that can represent changing data, map locations, or diagram features.