We improved biometric authentication security using dual recognition based on fingerprint image detection and skin-temperature-change sensing under quantum dot light-emitting diode (QLED) displays. QLEDs are more advantageous than organic light-emitting diodes (OLEDs) in terms of the contrast classification of patterns such as those in fingerprint recognition, owing to their narrow full-width-half-maximum. In this work, scattered, transmitted, and reflected light was captured from the top of the QLED, improving the digital luminance by 25%, as compared with that of OLEDs, because the electroluminescence spectra of the QLED were sustained, whereas those of the OLED were distorted by the generated noise peaks.
Nature
Korean researchers have found a way to improve biometric sensing mimicking what is essentially a possible measure with a QLED smartphone display. The process is essentially a two-factor authentication method because it prevents fingerprint forgery by having the addition of a sensor to look for the presence of a warm body behind the fingerprint. The research offers a number of interesting ideas: the use of a reduced graphene oxide (rGO) temperature sensor material and the lower full-width-half-maximum (FWHW) of green QLEDs being less prone to reflections from the fingerprint sensor.
Reference
Jung, H., Sim, S. & Lee, H. Biometric authentication security enhancement under quantum dot light-emitting diode display via fingerprint imaging and temperature sensing. Sci Rep 13, 794 (2023). https://doi.org/10.1038/s41598-023-28162-6
