Mobilizing Skin Care: Measuring and Tracking External Conditions with Light Emitting Diodes

Light emitting diode (LED) technology allows users to monitor their indoor and outdoor environments while engaged in various tasks. LED has long been touted for its direct benefits to the skin; now, new LED technology is monitoring many external conditions that directly relate to human skin and respiratory health. My Skin Track UV, from La Roche Posay, is an integrated near-field communication (NFC) app. The light emitting diode (LED) acts as a detector to capture UV light. The battery-free, water-proof LED is worn on clothing and the energy is read by transferring data from the sensor to a smartphone via NFC technology. Based on one’s UV exposure and other environmental factors, the app uses a closed-loop, proprietary algorithm to issue a notification when environmental exposure is at a level that contributes to the users’ specific skin concerns. Skin cancer is the most common form of cancer in the United States and is the easiest to prevent. My Skin Track UV measures UVA and UVB exposure, noting the maximum percentage of sun-stock – the recommended maximum daily allowance of UV based on skin tone and the UV index. It also tracks pollen, pollution, temperature, and humidity. This paper discusses application of LED and NFC technology and reviews similar skin care applications and health education, including uses and gratifications. The associated paper features background technological research behind the evolution of smart-phone UV skin monitoring. The paper also includes results from product demonstration.

Download Full-text

A GaN UV Light Emitting Diode

IEEE/LEOS 1995 Digest of the LEOS Summer Topical Meetings. Flat Panel Display Technology ◽

10.1109/leosst.1995.763984 ◽

2005 ◽

Author(s):

A.I. Akinwande ◽

B.L. Goldenberg ◽

R.D. Horning ◽

J. King

Keyword(s):

Uv Light ◽

Light Emitting Diode ◽

Light Emitting

Download Full-text

Investigation of Uniform Illumination of Near-Field Targets Using a Conic Light-Emitting Diode Array

Acta Optica Sinica ◽

10.3788/aos20103010.3039 ◽

2010 ◽

Vol 30 (10) ◽

pp. 3039-3043 ◽

Cited By ~ 2

Author(s):

黄启禄 Huang Qilu ◽

吴逢铁 Wu Fengtie

Keyword(s):

Light Emitting Diode ◽

Near Field ◽

Diode Array ◽

Uniform Illumination ◽

Light Emitting

Download Full-text

Suppression of “volcano” morphology and parasitic defect luminescence in AlGaN-based deep-UV light-emitting diode epitaxy

Results in Physics ◽

10.1016/j.rinp.2019.102285 ◽

2019 ◽

Vol 13 ◽

pp. 102285 ◽

Cited By ~ 1

Author(s):

Chia-Yen Huang ◽

Tsung-Yen Liu ◽

Shih-Ming Huang ◽

Kai-Hsiang Chang ◽

Tsu-Ying Tai ◽

...

Keyword(s):

Uv Light ◽

Light Emitting Diode ◽

Light Emitting ◽

Deep Uv ◽

Defect Luminescence

Download Full-text

Chromaticity Study of Curcumin Dye Extracted from Curcuma longa L. Using for UV Light down Conversion for White Light Emitting Diode

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.290.183 ◽

2019 ◽

Vol 290 ◽

pp. 183-189

Author(s):

Mahmood Al Shafouri ◽

Naser Mahmoud Ahmed ◽

Zainuriah Hassan ◽

Munirah Abdullah Almessiere

Keyword(s):

White Light ◽

Uv Light ◽

Light Emitting Diode ◽

Curcuma Longa ◽

Color Temperature ◽

Light Emitting ◽

Chromaticity Coordinates ◽

Major Factors ◽

Color Rendering ◽

Down Conversion

In thus study, Turmeric phosphor dye was extracted from Curcuma Longa L. via a simple technique using silica gel. The phosphor was used for light down-conversion of UV light for the manufacture white light emitting diode (WLED). The UV-LED was analyzed over 395nm wavelengths. The characteristics of the white light chromaticity were controlled by tuning the current and phosphor concentration. An optimum color rendering index (CRI) value of 63.4 was obtained. The chromaticity coordinates (CIE) and correlated color temperature (CCT) were measured for various currents and phosphor concentrations. The white phosphor exhibited CIE value of 0.355,0.338 and CCT of 4567 K. The concentration of phosphor and amount of applied current were confirmed to be major factors that control the intensity of white light emitted from the sample, where CIE and CRI of the emitted light steadily increased with the concentration of phosphor and current. Thus, phosphor concentration has a critical effect on conversion efficiency. Key words: Turmeric, phosphor, WLED, curcumin

Download Full-text

High Sensitivity of NO Gas Sensors Based on Novel Ag-Doped ZnO Nanoflowers Enhanced with a UV Light-Emitting Diode

ACS Omega ◽

10.1021/acsomega.8b01882 ◽

2018 ◽

Vol 3 (10) ◽

pp. 13798-13807 ◽

Cited By ~ 17

Author(s):

You-Ting Tsai ◽

Shoou-Jinn Chang ◽

Liang-Wen Ji ◽

Yu-Jen Hsiao ◽

I-Tseng Tang ◽

...

Keyword(s):

Gas Sensors ◽

Uv Light ◽

Light Emitting Diode ◽

High Sensitivity ◽

Light Emitting ◽

Doped Zno

Download Full-text

Visible-Light-Driven Photocatalytic Activity of Magnetic BiOBr/SrFe12O19 Nanosheets

Nanomaterials ◽

10.3390/nano9050735 ◽

2019 ◽

Vol 9 (5) ◽

pp. 735 ◽

Cited By ~ 3

Author(s):

Taiping Xie ◽

Jiao Hu ◽

Jun Yang ◽

Chenglun Liu ◽

Longjun Xu ◽

...

Keyword(s):

Magnetic Properties ◽

Electron Microscope ◽

Visible Light ◽

Uv Light ◽

Light Emitting Diode ◽

Active Species ◽

Composite Catalyst ◽

Light Emitting ◽

Transmission Electron ◽

Visible Light Driven

Magnetic BiOBr/SrFe12O19 nanosheets were successfully synthesized using the hydrothermal method. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), and UV-visible diffused reflectance spectra (UV-DRS), and the magnetic properties were tested using a vibration sample magnetometer (VSM). The as-produced composite with an irregular flaky-shaped aggregate possesses a good anti-demagnetization ability (Hc = 861.04 G) and a high photocatalytic efficiency. Under visible light (λ > 420 nm) and UV light-emitting diode (LED) irradiation, the photodegradation rates of Rhodamine B (RhB) using BiOBr/SrFe12O19 (5 wt %) (BOB/SFO-5) after 30 min of reaction were 97% and 98%, respectively, which were higher than that using BiOBr (87%). The degradation rate of RhB using the recovered BiOBr/5 wt % SrFe12O19 (marked as BOB/SFO-5) was still more than 85% in the fifth cycle, indicating the high stability of the composite catalyst. Meanwhile, after five cycles, the magnetic properties were still as stable as before. The radical-capture experiments proved that superoxide radicals and holes were main active species in the photocatalytic degradation of RhB.

Download Full-text

Changes in Lighting Source Can Produce Inaccurate Assessment of Visual Poultry Doneness and Induce Consumers To Eat Undercooked Ground Turkey Patties

Journal of Food Protection ◽

10.4315/0362-028x.jfp-18-392 ◽

2019 ◽

Vol 82 (3) ◽

pp. 528-534 ◽

Cited By ~ 1

Author(s):

CURTIS MAUGHAN ◽

EDGAR CHAMBERS IV ◽

SANDRIA GODWIN ◽

DELORES CHAMBERS

Keyword(s):

Foodborne Pathogens ◽

Light Emitting Diode ◽

The United States ◽

Extrinsic Factors ◽

Visual Appearance ◽

Light Emitting ◽

End Point ◽

Lighting Conditions ◽

Compact Fluorescent Lamp ◽

End Point Temperature

ABSTRACT Undercooked poultry is a potential source of foodborne pathogens, such as Salmonella and Campylobacter. The best way to avoid eating undercooked poultry is to use a food thermometer during cooking. However, consumers who cook poultry often use visual appearance for determining doneness, which relies on extrinsic factors, including lighting conditions. Because the United States recently mandated changes in lighting to promote energy conservation, this study evaluated the effect of lighting sources on consumer perceptions of doneness and willingness to eat cooked poultry patties. Consumers (n = 104) evaluated validated photographs of turkey patties cooked to different end point temperatures (57 to 79°C) and rated the level of perceived doneness and willingness to eat each sample. Evaluations were conducted under different lighting sources: incandescent (60 W, soft white), halogen (43 W, soft white), compact fluorescent lamp (13 W, soft white), light-emitting diode (LED; 10.5 W, soft white), and daylight LED (14 W). Lighting changed perception of doneness and willingness to eat the patties, with some of the energy-efficient options, such as LED and halogen making samples appear more done than they actually were, increasing the willingness to eat undercooked samples. This poses a risk of consuming meat that could contain bacteria not killed by heat treatment. Recent changes in lighting regulations can affect lighting in homes that affects perceptions of poultry doneness, requiring that educators place extra emphasis on the message that properly using a meat thermometer is the only way to ensure meat is cooked to a safe end point temperature.

Download Full-text