Open AccessHigh SNR fingerprinting structure for LC displays
Author(s) -
Kaixuan Huang,
Zhikang Zhu,
Hongzhou Zhang,
Jiangang Lu
Publication year - 2020
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.393706
Subject(s) - backlight , optics , fingerprint (computing) , liquid crystal display , interference (communication) , materials science , collimated light , fingerprint recognition , wavelength , ridge , computer science , physics , laser , telecommunications , artificial intelligence , channel (broadcasting) , paleontology , biology
An optical fingerprinting solution with a switchable backlight is demonstrated for liquid crystal displays (LCDs). In fingerprinting mode, the collimated infrared light is applied to improve the signal-noise ratio (SNR) between the valley and ridge of the fingerprint. Compared with the conventional backlight, the proposed structure can effectively improve the SNR. Furthermore, the fingerprinting mode and the display mode may work at the same time without interference because of the different wavelengths and light paths. It shows the great potential application of LCD-based optical fingerprints.