Color-Matching LCD를 위한 형광체 전환효율의 측정과 분석
Measurement and Analysis of Phosphor Conversion Efficiency for Color-Matching LCDs
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초록
고효율 color-matching LCD (liquid crystal display)에 적용하기 위하여, 445 nm의 청색 여기광을 사용하여 적색 및 녹색 형광체 의 전환효율과 양자효율을 측정 분석하였다. 투명한 기판 및 표면이 반사처리된 기판에 각각 두께 50 μm의 적색, 녹색 형광체를 코팅하고, 적분구를 사용하여 형광의 세기를 측정하였다. 적색 형광체 및 녹색 형광체에 대해서 전환효율은 각각 41.4%과 46%였 으며, 양자효율은 각각 60.4%와 53.5%였다. 제조사의 제원과의 차이점에 대해서 검토되었다.
Abstract
Power conversion efficiency of the red and green phosphors was measured and analyzed. Two different samples of phosphorsof thickness 50 µm were prepared: one was the phosphor layer coated on the transparent substrate and the other was preparedon the reflective substrate. The 445 nm blue laser diode beam was used as the exciting beam. The conversion efficiencies ofthe red and green phosphor layers were 41.4% and 46%, respectively. The quantum efficiencies of the red and green phosphorswere 60.4% and 53.5%, respectively.
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