液晶与显示2011，Vol.26Issue(3)：315-319,5.DOI:10.3788/YJYXS20112603.0315
无汞平面光源区域调光方法的设计与实现
Local Dimming Method for Mercury Free Flat Fluorescent Lamp with Arc-Like Electrode
摘要
Abstract
An electrode structure for local dimming was presented in this article with a newly developed co-planar type mercury free flat fluorescent lamp (FFL), which showed a large operating margin, high luminance and high luminous efficacy in the case of unipolar driving.Furthermore, the dimming circuit and method were presented and a 81 cm (32 in) FFL prototype was built and verified.The experiment results show that a local dimming can be implemented horizontally and vertically with the proposed electrode structure by pulse density modulation (PDM) method or frequency modulation method.It also demonstrates that the power consumption can be reduced since the light output of FFL can be controlled.The power varied with brightness from 100％ of the max power consumption 256 W to 6％ of the max power consumption, the luminous efficacy increased as the luminance decreased, a max system efficiency about 29 lm/W could be obtained when the luminance decreased to 400 cd/m2 and a dimming range about 100％～6％ can be achieved by using the proposed method.关键词
平面光源/区域调光/亮度/发光效率Key words
flat fluorescent lamp/ local dimming/ luminance/ luminous efficacy分类
信息技术与安全科学引用本文复制引用
王兴常,刘震,胡文波,雷磊..无汞平面光源区域调光方法的设计与实现[J].液晶与显示,2011,26(3):315-319,5.基金项目
中央高校基本科研业务费专项资金(No.201061) （No.201061）
