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Electrically-controlled digital metasurface device for light projection displays.

ABSTRACT: Light projection displays play an increasingly important role in our modern life. Core projection systems including liquid crystal displays and digital micromirror devices can impose spatial light modulation and actively shape light waves. Recently, the advent of metasurfaces has revolutionized design concepts in nanophotonics, enabling a new family of optical elements with exceptional degrees of freedom. Here, we demonstrate a light projection display technology based on optical metasurfaces, called digital metasurface device (DMSD). Each metasurface pixel in a DMSD is electrically reconfigurable with well-controlled programmability and addressability. The DMSD can not only continuously modulate the intensity of light with high contrast, but also shape the wavefront of light generated by each metasurface pixel and dynamically switch between arbitrary holographic patterns. Our approach will pave an avenue towards the development of customized light projection devices. It will also drive the field of dynamic optical metasurfaces with fresh momentum and inspiring concepts.

SUBMITTER: Li J

PROVIDER: S-EPMC7367846 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature

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Electrically-controlled digital metasurface device for light projection displays.

Li Jianxiong J Yu Ping P Zhang Shuang S Liu Na N

Nature communications 20200717 1

Light projection displays play an increasingly important role in our modern life. Core projection systems including liquid crystal displays and digital micromirror devices can impose spatial light modulation and actively shape light waves. Recently, the advent of metasurfaces has revolutionized design concepts in nanophotonics, enabling a new family of optical elements with exceptional degrees of freedom. Here, we demonstrate a light projection display technology based on optical metasurfaces, c ...[more]

PMID: 32681122

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Project description:ObjectiveTo evaluate whether pelvic floor muscle training using a motion-based digital intravaginal device is more effective than home pelvic floor muscle training for treatment of stress or stress-predominant mixed urinary incontinence (UI).MethodsIn a remote, virtually executed 8-week prospective randomized controlled superiority trial, women with stress or stress-predominant mixed UI were randomized to pelvic floor muscle training using a motion-based digital therapeutic device or a home training program using written and narrated instructions. Primary outcomes were change in UDI-6 (Urogenital Distress Inventory, Short Form) score and stress urinary incontinence (SUI) episodes on a 3-day bladder diary. A sample size of 139 per group (n=278) was planned to meet the power analysis requirements for the UDI-6 score (n=278) and the bladder diary (n=78). Prespecified secondary outcomes included quality-of-life surveys and adherence reporting.ResultsFrom September 2020 to March 2021, 5,353 participants were screened, and 363 were randomized: 182 in the intervention and 181 in the control group. There were no baseline clinicodemographic differences between groups. The mean change in UDI-6 score was significantly greater for the intervention group compared with the control group (18.8 vs 14.7, P=.01). The median (interquartile range) number of SUI episodes on the 3-day bladder diary was significantly reduced from 5 (3-8) and 5 (3-8) episodes to 1 (0-3) and 2 (1-4) (P=.005) in the intervention group compared with control group, respectively. A significantly greater number of participants in the intervention group than in the control group reported they were "much improved" or "very much improved" on the PGI-I (Patient Global Impression of Improvement) (63/143 [44.1% vs 45/156 [28.8%], odds ratio 1.94, 95% CI 1.21-3.15). There were no device-related severe adverse events.ConclusionIn this all-remote, virtually conducted trial, pelvic floor muscle training guided by a motion-based digital therapeutic device resulted in significantly improved UI symptoms and reduction of UI episodes compared with a home training program.Clinical trial registrationClinicalTrials.gov, NCT04508153.Funding sourceRenovia Inc.

Dataset Information

Electrically-controlled digital metasurface device for light projection displays.

Publications

Electrically-controlled digital metasurface device for light projection displays.

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