• Title, Summary, Keyword: Near-Infrared LED

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Desktop-LED lighting for Eye Muscle Movement by Adjusting the Light Illuminance and Color Temperature

  • Kim, Byoung-Chul;Kim, Seon-Jong;Kim, Joo-Man
    • International journal of advanced smart convergence
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    • v.9 no.4
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    • pp.203-208
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    • 2020
  • In this paper, we propose the design and implementation of a desktop LED stand and smart app that automatically adjusts color temperature and illuminance for optimal brightness and eye health by improving the structural problem of the LED stand. It is a tabletop LED stand that supports optimal brightness through color temperature control and heat transfer through infrared LED to relieve eye strain through blood circulation and muscle movement. The LED stand works with the smartphone to automatically adjust the optimal brightness and color temperature for the user's environment. In addition, the brightness of the infrared LED is adjusted to a living frequency of 4Hz to relax the eye muscles and reduce eye strain. This study implemented an effective measured data-based system of previous studies through the color temperature and illumination of LED lighting, and near-infrared rays, and presented meaningful results by conducting an experiment to prove the effect through subjects.

Monitoring of Environmental Arsenic by Cultures of the Photosynthetic Bacterial Sensor Illuminated with a Near-Infrared Light Emitting Diode Array

  • Maeda, Isamu;Sakurai, Hirokazu;Yoshida, Kazuyuki;Siddiki, Mohammad Shohel Rana;Shimizu, Tokuo;Fukami, Motohiro;Ueda, Shunsaku
    • Journal of Microbiology and Biotechnology
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    • v.21 no.12
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    • pp.1306-1311
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    • 2011
  • Recombinant Rhodopseudomonas palustris, harboring the carotenoid-metabolizing gene crtI (CrtIBS), and whose color changes from greenish yellow to red in response to inorganic As(III), was cultured in transparent microplate wells illuminated with a light emitting diode (LED) array. The cells were seen to grow better under near-infrared light, when compared with cells illuminated with blue or green LEDs. The absorbance ratio of 525 to 425 nm after cultivation for 24 h, which reflects red carotenoid accumulation, increased with an increase in As(III) concentrations. The detection limit of cultures illuminated with near-infrared LED was 5 ${\mu}g$/l, which was equivalent to that of cultures in test tubes illuminated with an incandescent lamp. A near-infrared LED array, in combination with a microplate, enabled the simultaneous handling of multiple cultures, including CrtIBS and a control strain, for normalization by the illumination of those with equal photon flux densities. Thus, the introduction of a near-infrared LED array to the assay is advantageous for the monitoring of arsenic in natural water samples that may contain a number of unknown factors and, therefore, need normalization of the reporter event.

Effect of Red and Infrared LED Light Therapy on Allergic Rhinitis (알레르기 비염 환자에서 적색 및 근적외선 LED 광선 치료 효과)

  • Park, Eal Whan
    • Journal of Biomedical Engineering Research
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    • v.40 no.4
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    • pp.125-131
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    • 2019
  • As a non-invasive method for alleviating allergic rhinitis, there has been a recent ongoing research in the treatment of light from light emitting diodes (LEDs) and lasers. A total of 15 subjects diagnosed with allergic rhinitis were selected for this study. Red and near infrared light emitted from LEDs with wavelengths of 660nm and 940nm were illuminated three times daily (three minutes per cycle) for a total of two weeks. The degree of nasal congestion, runny nose, sneezing and nasal itching was evaluated by questionnaires before and after the test. Also, the serum IgE (Immunoglobulin E) was measured and compared before and after the test. As a result, the total score of symptoms of allergic rhinitis was decreased by 67% after the test (P<0.01). The level of IgE was decreased by 17% after the test (P<0.05). In conclusion, the non-invasive LED phototherapy method using red and near-infrared LED light was effective in alleviating symptoms of allergic rhinitis. There were no adverse effects or complications reported during and after the test.

Design of 850 nm Near Infrared and Galvanic Current Based Eyeglass-Type Device for Periorbital Wrinkle Treatment and Verification of Treatment Performance through Image Analysis (850 nm 파장대 근적외선과 갈바닉 전류기반의 눈가 주름 치료기 개발 및 영상 분석을 통한 치료성능 검증)

  • Ahn, Sung Su;Kwon, Ki Jin
    • Journal of Korea Multimedia Society
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    • v.21 no.12
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    • pp.1379-1386
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    • 2018
  • In this paper, we proposed eyeglass type periorbital wrinkle treatment device for reducing and improving periorbital wrinkles using near infrared LED of 850nm wavelength and galvanic current. The proposed periorbital wrinkle treatment device is equipped with a control system based on F-PCB. It consists of eight near-infrared LEDs and four indicator LEDs for treatment of right and left periorbital wrinkles. The eyeglass frame is coated with conductive material, so galvanic current can flow to the skin of periorbital wrinkle contacted to it. One male adult in the mid-40s was allowed to use the device for 10 minutes every day for 4 weeks. After 4 weeks, image analysis using optical equipment for measuring wrinkles indicated that wrinkle indexes were reduced.

A Real-Time Motion Recognition Algorithm for a Rehabilitation Service (재활 훈련 서비스를 위한 실시간 모션인식 알고리즘)

  • Choi, Wan;Lim, Cheol-Su;Kim, Tae-Young
    • Journal of Korea Multimedia Society
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    • v.10 no.9
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    • pp.1143-1152
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    • 2007
  • The objective of this paper is to develop the real time motion recognition method for the rehabilitation program of the people with physical disabilities. Using the infrared ray LED, this method gets the Teal time information of the user's motion and tells the difference between the information we get and the pre-defined information. In order to get the fast recognition and comparison, this method positions the specific coordinates of infrared ray LED in the pre-classified sector which keeps certain distance and angle from the point of origin. The result In our experiment shows the speed over 20 frames per second in every motion, and we are satisfied the rate for the recognition of the motions which is near 98%.

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Study on the MTTF of Multi Wave Lengths IR and NIR LEDs Module (다파장 IR과 NIR 모듈의 평균 수명 예측에 관한 연구)

  • Kim, Dong Pyo;Kim, Kyung Seob
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.34 no.1
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    • pp.44-49
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    • 2021
  • Recently, infrared (IR) and near-infrared (NIR) light-emitting diodes (LEDs) were widely used for home medical applications owing to its low output power and wide exposed area for curing. For deep penetration of the light under the skin, multiple LEDs with wavelengths of 700~10,000 nm were located on a flexible printed circuit board. When multiple wavelengths of LEDs were soldered on a circuit board, the lifetime of LED module highly depends on LEDs with a short lifetime. The mean time to failure (MTTF) was able to calculate with the experimental results under high temperature and the Arrhenius model. The results of this study could help companies to approve the warranty of LED modules and its product.

The Role of SPICA/FPC in the SPICA System

  • Jeong, Woong-Seob;Matsumoto, Toshio;Lee, Dae-Hee;Pyo, Jeong-Hyun;Park, Sung-Joon;Moon, Bong-Kon;Ree, Chang-Hee;Park, Young-Sik;Han, Won-Yong;Lee, Hyung-Mok;Im, Myung-Shin;SPICA/FPC Team, SPICA/FPC Team
    • The Bulletin of The Korean Astronomical Society
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    • v.37 no.1
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    • pp.64.2-64.2
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    • 2012
  • The SPICA (SPace Infrared Telescope for Cosmology & Astrophysics) project is a next-generation infrared space telescope optimized for mid- and far-infrared observation with a cryogenically cooled 3m-class telescope. It will achieve the high resolution as well as the unprecedented sensitivity from mid to far-infrared range. The FPC (Focal Plane Camera) is a Korean-led near-infrared instrument as an international collaboration. The FPC-S and FPC-G are responsible for the scientific observation in the near-infrared and the fine guiding, respectively. The FPC-G will significantly reduce the alignement and random pointing error through the observation of guiding stars in the focal plane. We analyzed the pointing requirement from the focal plane instruments. The feasibility study was performed to achieve the requirements. Here, we present the role of SPICA/FPC as a fine guiding camera.

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A Rehabilitation Training System Using the infrared LED based Motion Analysis (적외선 LED 기반 모션 분석을 통한 재활훈련 시스템)

  • Choi, Wan;Lim, Chul-Su;Kim, Tae-Young
    • Journal of the Korea Computer Graphics Society
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    • v.13 no.4
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    • pp.29-36
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    • 2007
  • The objective of this paper is to develop the motion recognition method for the rehabilitation program of the people with physical disabilities. Using the infrared ray LED, this method gets the information of the user's motion and tells the difference between the information we get and the pre-defined information. In order to get the fast recognition and comparison, this method positions the specific coordinates of infrared ray LED in the pre-classified sector which keeps certain distance and angle from the point of origin. The result in our experiment shows the speed over 20 frames per second in every motion, and we are satisfied the rate for the recognition of the motions which is near 98%.

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A Study on PWM Control of Near-Infrared Fluorescence Imaging System (근적외선 형광 영상시스템의 PWM 제어에 관한 연구)

  • Lee, Byeong-Ho;Pan, Sung Bum
    • The Journal of Korean Institute of Information Technology
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    • v.16 no.11
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    • pp.115-121
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    • 2018
  • Fluorescent images using near-infrared light have no worry about radioactivity, and images can be checked in real time during surgery. Therefore experiments using fluorescent images for monitoring lymph node biopsy are actively under way. Fluorescent imaging equipment uses high heat-generating components such as LED and camera, thus uses water-cooling system as a stable heating suppression means. However in the fluorescent image equipment, the water cooling system takes a large volume which is a disadvantage in terms of miniaturization of the equipment. Even if the air cooling system is used for miniaturizing the equipment, heat generation is a problem. In this paper, we have experimented with the air cooling method using PWM control for the miniaturization of the equipment, and confirmed the constant quality of the fluorescent image and the suppression of the heat generation without any problems even when the equipment is used for a long time.

Development of Night Vision Imaging System Green A Compatible LED for Avionic Applications (항공전자 응용을 위한 NVIS (Night Vision Imaging System) Green A 호환 LED 개발)

  • Kim, Tae Hoon;Yu, Chang Han;Yoon, Hyeon Ju;Kim, Min Pyung;Yoon, Ho Shin
    • Journal of the Semiconductor & Display Technology
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    • v.19 no.4
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    • pp.1-5
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    • 2020
  • By adapting black body leadflame and thin film type Green A filter, we successfully demonstrated night vision imaging system (NVIS) Green A compatible LED. Fabricated NVIS compatible LEDs show small form factor compared to that of commercialized NVIS compatible LED. Especially, NVIS radiance and chromaticity of MIL-STD-3009 specification can be satisfied simultaneously and easily by controlling the color temperature of the white LED as well as the concentration of the Green A dye and the thickness of the Green A filter. The optimal dye concentration of the NVIS Green A filter is expected to be about 1 wt%. The results of this study are expected to contribute to miniaturization, weight reduction and localization of avionic display and lighting devices.

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