Yellow-ring measurement of white LED in various lighting environments

被引：15

作者：

Yang, Ching-Ching ^{[1
]}

Tsai, Hsin-Yi ^{[1
]}

Huang, Kuo-Cheng ^{[1
]}

机构：

[1] Natl Appl Res Labs, Instrument Technol Res Ctr, Hsinchu 30076, Taiwan

来源：

OPTICAL REVIEW | 2013年 / 20卷 / 02期

关键词：

yellow-ring; white LED; BRUCKE HUE-SHIFT;

D O I：

10.1007/s10043-013-0042-1

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

White LEDs (WLEDs) have various yellow-ring (YR) effects when projected onto differing backgrounds. These effects are determined by the material that the WLED is projected onto. In our previous study, the YR phenomenon was expressed as the yellow-ring index (YRI), which comprises yellow light intensity (Y) and light intensity (I), and the maximum value of the YRI curve is a crucial optical parameter for determining the degree of the YR phenomenon. This study presents a modified evaluation model using YR degree and four YR diagrams (the YRIs are less than 5, 5 to 10, 10 to 15, and greater than 15) as the criterion for WLED quality control.

引用

页码：232 / 235

页数：4

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