P‐9.12: Study of Fatigue of SSVEP with Partitioned Backlight LCD Display

Abstract

Integration of interactive functions into display is an important trend of display technology. Brain‐computer interfaces enable human‐machine interaction by interpreting electroencephalogram signals, among which Steady‐State Visual Evoked Potential (SSVEP) based on liquid crystal displays is a promising BCI type. Currently, LCD faces the limitation of a mere 240Hz refresh rate. However, this constraint can be surpassed by partitioned backlighting (PB), which effortlessly achieves a refresh rate of 1kHz. Comparing with traditional LCD‐SSVEP, this article studies the brain fatigue of PB‐SSVEP by conducting experiments to measure ophthalmic parameters and EEG. The results indicate that under specific frequency, size, and color conditions, PB‐SSVEP induces lighter visual and brain fatigue to a certain extent.