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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.
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.