A team of researchers at Shizuoka University is hitching a ride on Japan's bullet train technology, aiming to transmit targeted advertising at high speeds.
Using a groundbreaking technique called high-speed suggestive particle mapping (HS-SPAM), the system relies on embedded arrays of microscopic LEDs that flash subliminal messages. The initial tests, conducted in 2015, confirmed that images could be effectively transmitted and recognized by viewers.
Not long after they released their research, the team was approached by JR Tokai about deploying its HS-SPAM tech as an advertising medium for next-generation magnetic levitation trains.