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RISS 인기검색어
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- 저자 : 임수현(S. H. Lim) (검색결과 10 건)
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RGB형 LED Backlight의 전류 및 온도 변화에 따른 특성 분석
임수현(S.H. Lim),임정규(J.G. Lim),신휘범(H.B. Shin),정세교(S.K. Chung),신민재(M.J Shin),손승걸(S.G. Sohn) 전력전자학회 2007 전력전자학술대회 논문집 Vol.- No.-
The LCD backlight technique using light-emitting diode(LED) has been studied in the recent backlight market. The white light is need for LCD backlight and it is generally implemented by combining the RGB-LEDs to obtain the high brightness. However, RGB-LEDs have different color characteristics for the current and temperature variations, which results in the color shift problem. The color shift characteristics of RGB-LEDs for the current and temperature variations are investigated in this paper. This result can be used to control the color of backlight system using RGB-LEDs.
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항공기 디스플레이용 LED Backlight의 광대역 Dimming Controller 구현
임수현(S.H. Lim),임정규(J.G. Lim),신휘범(H.B. Shin),정세교(S.K. Chung),신민재(M.J. Shin),손승걸(S.G. Sohn) 전력전자학회 2007 전력전자학술대회 논문집 Vol.- No.-
This paper describes an implementation of a wide-range dimming controller of a LED backlight for Avionics applications such as the control data unit(CDU) and multi-function display(MFD). A feedback controller using a light sensor is proposed to control the brightness in the low dimming range. The proposed controller provides an improved control performance in the wide dimming range of 1:3000 even under the temperature variations. The experimental results are provided to show the effectiveness of the proposed control system.
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김현준,주상규,임수현,변미경,한상휘,허웅 明知大學校 産業技術硏究所 2007 産業技術硏究所論文集 Vol.26 No.-
As medical technology develops and the interest of health increases, diagnostic study for diseases and development of medical treatments are actively progressing. However, development of oriental diagnosis equipments leave much too be desired. In this paper, we developed a system to objectify mac-I in on this score. The RSP signals are detected by using a thermistor which detects temperature variation of nasal air flows, the PPG signals are detected by using reflected volume of light through transmitting light at the blood vessel, and EEG signals are detected by using disposable Ag-AgC1 electrode. Besides we classified frequency components of EEG signal through acquired signals, we measured the number of pulse per one respiration. In this study, as the result of experimets among subjects using the developed system, we could acquire proper waveforms of biomedical signals to detect the number of pulse per one respiration.
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