Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

IR Frequency Region: Fingerprint Region

IR Frequency Region: Fingerprint Region

IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Mechanism guided near-infrared determination of soluble solids content in whole European plum based on optical properties and Monte Carlo simulation.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy·2026

Same author

Corrosion Behavior of Ni-P/Cu Catalyst in Optimization of Electroplating Process Inside the NaBH<sub>4</sub> Seawater Fuel Cell.

Materials (Basel, Switzerland)·2026

Same author

Correction: A new criterion for defining tunnel portal failure using the strength reduction method.

PloS one·2026

Same author

The effect of yttrium addition on the ratcheting behavior of magnesium.

PloS one·2026

Same author

A novel flexible composite polymer electrolyte with robust interfaces and synergistic ion channels for solid-state sodium metal batteries.

Journal of colloid and interface science·2026

Same author

A new criterion for defining tunnel portal failure using the strength reduction method.

PloS one·2026

Search research articles

Related Experiment Video

Updated: Dec 14, 2025

A Guide to Structured Illumination TIRF Microscopy at High Speed with Multiple Colors

A Guide to Structured Illumination TIRF Microscopy at High Speed with Multiple Colors

Published on: May 30, 2016

High SNR fingerprinting structure for LC displays.

Kai Huang, Zhikang Zhu, Hongzhou Zhang

|July 19, 2020

Summary

This study introduces an optical fingerprinting solution using switchable backlights for liquid crystal displays (LCDs). The new method enhances fingerprint signal-noise ratio (SNR) for improved security applications.

Area of Science:

Optoelectronics
Display Technology
Biometrics

Background:

Traditional fingerprint sensors face limitations in integration and signal quality.
Liquid Crystal Displays (LCDs) offer a potential platform for integrated sensing solutions.

Purpose of the Study:

To demonstrate an optical fingerprinting solution integrated with a switchable backlight for LCDs.
To enhance the signal-noise ratio (SNR) for clearer fingerprint detection.

Main Methods:

Utilized a switchable backlight system for LCDs.
Employed collimated infrared light in fingerprinting mode.
Analyzed the signal-noise ratio (SNR) between fingerprint ridges and valleys.

Main Results:

More Related Videos

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Published on: May 29, 2018

Multiplex Chemical Imaging Based on Broadband Stimulated Raman Scattering Microscopy

Multiplex Chemical Imaging Based on Broadband Stimulated Raman Scattering Microscopy

Published on: July 25, 2022

Related Experiment Videos

Last Updated: Dec 14, 2025

A Guide to Structured Illumination TIRF Microscopy at High Speed with Multiple Colors

A Guide to Structured Illumination TIRF Microscopy at High Speed with Multiple Colors

Published on: May 30, 2016

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Published on: May 29, 2018

Multiplex Chemical Imaging Based on Broadband Stimulated Raman Scattering Microscopy

Multiplex Chemical Imaging Based on Broadband Stimulated Raman Scattering Microscopy

Published on: July 25, 2022

The proposed switchable backlight structure significantly improved the SNR compared to conventional backlights.
Simultaneous operation of fingerprinting and display modes was achieved without interference due to distinct wavelengths and light paths.
Demonstrated effective optical fingerprint detection using LCD technology.

Conclusions:

The developed LCD-based optical fingerprinting solution shows high potential for integrated biometric security.
The switchable backlight design offers a promising approach for enhancing SNR in optical fingerprint sensing.
This technology paves the way for multifunctional displays with embedded security features.