Smartphone-Driven Low-Power Light-Emitting Device
| Autor: | Kyoung-Jun Park, Nam-Gyun Kim, Kyung-Won Kim, Hea-Ja An, Mun-Ho Ryu, Han-Yeong Oh |
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| Rok vydání: | 2017 |
| Předmět: |
Engineering
lcsh:Medical technology Article Subject Biomedical Engineering Control unit Health Informatics USB law.invention 030207 dermatology & venereal diseases 03 medical and health sciences 0302 clinical medicine law Calibration Electronic engineering Humans Low-Level Light Therapy Inflammation lcsh:R5-920 business.industry Equipment Design 030206 dentistry Laser Power (physics) Intensity (physics) lcsh:R855-855.5 Surgery Smartphone lcsh:Medicine (General) business Pulse-width modulation Light emitting device Research Article Biotechnology |
| Zdroj: | Journal of Healthcare Engineering Journal of Healthcare Engineering, Vol 2017 (2017) |
| ISSN: | 2040-2309 2040-2295 |
| DOI: | 10.1155/2017/5076965 |
| Popis: | Low-level light (laser) therapy (LLLT) has been widely researched in the recent past. Existing LLLT studies were performed based on laser. Recently, studies using LED have increased. This study presents a smartphone-driven low-power light-emitting device for use in colour therapy as an alternative medicine. The device consists of a control unit and a colour probe. The device is powered by and communicates with a smartphone using USB On-The-Go (OTG) technology. The control unit controls emitting time and intensity of illumination with the configuration value of a smartphone application. Intensity is controlled by pulse width modulation (PWM) without feedback. A calibration is performed to resolve a drawback of no feedback. To calibrate, intensity is measured in every 10 percent PWM output. PWM value is linearly calibrated to obtain accurate intensity. The device can control the intensity of illumination, and so, it can find application in varied scenarios. |
| Databáze: | OpenAIRE |
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