The Design and Fabrication of Large-Area Under-Screen Fingerprint Sensors with Optimized Aperture and Microlens Structures.

Chih-Chieh Yeh, Teng-Wei Huang, You-Ren Lin, Guo-Dung Su

Abstract read

In one paragraph

Article in Sensors (Basel, Switzerland), 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it

0cells of the map it votes in

1citing papers in PubMed

–field-weighted citation impact

1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

Wide Field of View Under-Panel Optical Lens Design for Fingerprint Recognition of Smartphone.Micromachines · 2024
Article

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Chih-Chieh YehGraduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan.

Teng-Wei HuangGraduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan.

You-Ren LinGraduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan.

Guo-Dung SuGraduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan.

Funding

national science and technology council MOST 111-2221-E-002 -083 -MY3

6 · The paper itself

Abstract

In this paper, we designed and fabricated an optical filter structure applied to the FoD (Fingerprint on Display) technology of the smartphone, which contains the microlens array, black matrix, and photodetector to recognize the fingerprint on a full touchscreen. First, we used optical ray tracing software, ZEMAX, to simulate a smartphone with FoD and a touching finger. We then further discussed how the aperture and microlens influence the fingerprint image in this design. Through numerical analysis and process constraint adjustment to optimize the structural design, we determined that a modulation transfer function (MTF) of 60.8% can be obtained when the thickness of the black matrix is 4 μm, allowing successful manufacturing using photolithography process technology. Finally, we used this filter element to take fingerprint images. After image processing, a clearly visible fingerprint pattern was successfully captured.

Indexed as

absorbanceblack matrixblock layerfingerprint on displayray tracing

Identifiers

PMID37960431

DOI10.3390/s23218731

PMCPMC10648296

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.