High SNR fingerprinting structure for LC displays | Zendy

Kai Huang | Zendy; Zhikang Zhu | Zendy; Hongzhou Zhang | Zendy; Jiangang Lü | Zendy

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High SNR fingerprinting structure for LC displays

Author(s) -

Kai Huang,

Zhikang Zhu,

Hongzhou Zhang,

Jiangang Lü

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.

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