Skin Improvement Effect of Tencel Sheet Mask Pack Using Self-luminous LED Light Source

Purpose: This study intends to prove whether the efficacy already proven in the existing light therapy LED mask device is similarly exerted in the self-luminous LED sheet mask that does not require power.Methods: The experimental subjects of this study were women with an average age of 47.9 years, and the effect of improving 24-hour moisturizing lasting, skin elasticity, eye expression wrinkles, and facial (cheek) lifting was studied by prohibiting the use of cosmetics containing active ingredients that could affect the results and making them use an LED sheet type mask pack.Results: As a result of the experiment, the 24-hour moisturizing lasting power was 90.573% immediately after use and 37.384% after 24 hours, so it increased significantly (p<0.05), and skin elasticity was also increased by 7.087% immediately after use. After one week, it was increased significantly (p<0.025) to 11.181%. Expression wrinkles around the eyes were significantly reduced (p<0.05) to 1.621% immediately after use and 4.579% after 1 week of use. In the facial (cheek) lifting experiment, the cheek angle (°) was reduced to 2.065% immediately postuse compared to pre-use. Also, it was significantly decreased (p<0.05) with a result of 3.762% after 1 week of use, thus proving that the light therapy LED sheet mask is also effective for skin improvement.Conclusion: Using this research material as basic data, it is expected that various skincare products will be developed as well as mask packs with a simple and easy structure of effective light therapy.

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Efficacy of blue light imaging using LED light source for diagnosis of early gastric cancer

10.26226/morressier.59a6b346d462b80290b54b7a ◽

2017 ◽

Author(s):

Osamu Dohi

Keyword(s):

Gastric Cancer ◽

Early Gastric Cancer ◽

Light Source ◽

Blue Light ◽

Led Light

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Subcell Operation and Long‐Term Stability Analysis of Perovskite‐based Tandem Solar Cells using a Bichromatic LED Light Source

Solar RRL ◽

10.1002/solr.202100311 ◽

2021 ◽

Author(s):

Marko Jošt ◽

Gašper Matič ◽

Eike Köhnen ◽

Bor Li ◽

Boštjan Glažar ◽

...

Keyword(s):

Solar Cells ◽

Stability Analysis ◽

Light Source ◽

Tandem Solar Cells ◽

Led Light ◽

Term Stability ◽

Long Term Stability

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Analysis on High-Power Seaport LED Luminaire with Uniform Light Distribution Based on Optimized Lens and Heatsink

Applied Sciences ◽

10.3390/app11094035 ◽

2021 ◽

Vol 11 (9) ◽

pp. 4035

Author(s):

Jinsheon Kim ◽

Jeungmo Kang ◽

Woojin Jang

Keyword(s):

Light Source ◽

High Power ◽

Heat Dissipation ◽

Light Emitting Diode ◽

Light Distribution ◽

Light Sources ◽

Led Light ◽

High Power Led ◽

Distribution Requirement ◽

Lighting Application

In the case of light-emitting diode (LED) seaport luminaires, they should be designed in consideration of glare, average illuminance, and overall uniformity. Although it is possible to implement light distribution through auxiliary devices such as reflectors, it means increasing the weight and size of the luminaire, which reduces the feasibility. Considering the special environment of seaport luminaires, which are installed at a height of 30 m or more, it is necessary to reduce the weight of the device, facilitate replacement, and secure a light source with a long life. In this paper, an optimized lens design was investigated to provide uniform light distribution to meet the requirement in the seaport lighting application. Four types of lens were designed and fabricated to verify the uniform light distribution requirement for the seaport lighting application. Using numerical analysis, we optimized the lens that provides the required minimum overall uniformity for the seaport lighting application. A theoretical analysis for the heatsink structure and shape were conducted to reduce the heat from the high-power LED light sources up to 250 W. As a result of these analyses on the heat dissipation characteristics of the high-power LED light source used in the LED seaport luminaire, the heatsink with hexagonal-shape fins shows the best heat dissipation effect. Finally, a prototype LED seaport luminaire with an optimized lens and heat sink was fabricated and tested in a real seaport environment. The light distribution characteristics of this prototype LED seaport luminaire were compared with a commercial high-pressure sodium luminaire and metal halide luminaire.

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Photothermal Therapy Using Gold Nanorods and Near-Infrared Light in a Murine Melanoma Model Increases Survival and Decreases Tumor Volume

Journal of Nanomaterials ◽

10.1155/2014/450670 ◽

2014 ◽

Vol 2014 ◽

pp. 1-8 ◽

Cited By ~ 19

Author(s):

Mary K. Popp ◽

Imane Oubou ◽

Colin Shepherd ◽

Zachary Nager ◽

Courtney Anderson ◽

...

Keyword(s):

Light Source ◽

Gold Nanorods ◽

Photothermal Therapy ◽

Near Infrared ◽

Tumor Volume ◽

Infrared Light ◽

Led Light ◽

Murine Melanoma ◽

Nir Light ◽

Melanoma Model

Photothermal therapy (PTT) treatments have shown strong potential in treating tumors through their ability to target destructive heat preferentially to tumor regions. In this paper we demonstrate that PTT in a murine melanoma model using gold nanorods (GNRs) and near-infrared (NIR) light decreases tumor volume and increases animal survival to an extent that is comparable to the current generation of melanoma drugs. GNRs, in particular, have shown a strong ability to reach ablative temperatures quickly in tumors when exposed to NIR light. The current research tests the efficacy of GNRs PTT in a difficult and fast growing murine melanoma model using a NIR light-emitting diode (LED) light source. LED light sources in the NIR spectrum could provide a safer and more practical approach to photothermal therapy than lasers. We also show that the LED light source can effectively and quickly heatin vitroandin vivomodels to ablative temperatures when combined with GNRs. We anticipate that this approach could have significant implications for human cancer therapy.

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