Local Dimming Method for Mercury Free Flat Fluorescent Lamp with Arc-Like Electrode

WANG Xing-chang; LIU Zhen; HU Wen-bo; LEI Lei

doi:10.3788/YJYXS20112603.0315

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Local Dimming Method for Mercury Free Flat Fluorescent Lamp with Arc-Like Electrode

Device Technology & Physics | 更新时间：2020-08-12

- Local Dimming Method for Mercury Free Flat Fluorescent Lamp with Arc-Like Electrode
- Chinese Journal of Liquid Crystals and Displays Vol. 26, Issue 3, Pages: 315-319(2011)
- 作者机构：
  
  西安交通大学电子物理与器件教育部重点实验室,陕西西安,710049
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20112603.0315
  CLC： TN27;TM923.01
- Received：24 November 2010，
  
  Revised：03 March 2011，
  
  Published Online：20 June 2011，
  
  Published：20 June 2011
- 稿件说明：
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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

WANG Xing-chang, LIU Zhen, HU Wen-bo, LEI Lei. Local Dimming Method for Mercury Free Flat Fluorescent Lamp with Arc-Like Electrode[J]. , 2011,26(3): 315-319
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 DOI： 10.3788/YJYXS20112603.0315.

WANG Xing-chang, LIU Zhen, HU Wen-bo, LEI Lei. Local Dimming Method for Mercury Free Flat Fluorescent Lamp with Arc-Like Electrode[J]. , 2011,26(3): 315-319 DOI： 10.3788/YJYXS20112603.0315.

摘要

为了提高无汞平面光源(FFL)的发光效率和避免放电收缩

设计并制作了一种新型的具有弧形电极结构的无汞平面光源

该结构光源在单极性脉冲作用下具有高亮度、高发光效率以及高工作余度等特性;另外

设计了一种可实现区域调光的电极结构

基于该结构光源

提出了一种调光方法及调光电路;最后

完成了基于81 cm (32 in)无汞平面光源的模型验证。实验结果表明:所设计的平面光源可采用脉冲密度调制或者脉冲频率调制的调光方法来实现亮度的行列可调

在最大亮度时

其功耗为256 W;而当其亮度降低至400 cd/m

时

其功耗降低至15 W

此时FFL有最高发光效率为29 lm/W。采用区域调光方法可以在获得100%~6%宽范围亮度调节的同时

有效降低FFL背光源的功耗。

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/m

and a dimming range about 100%~6% can be achieved by using the proposed method.

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references

Urakabe T, Harada S, Saikatsu T, et al. A flat fluorescent lamp with Xe dielectric barrier discharge[J]. J. Light Vis. Env., 1996, 20(2):20-25.[2] Ikeda Y, Shiga T, Mikoshiba S, et al. Mercury-free, simple-structured flat discharge LCD backlights ranging from 0.5 to 5.2-in diagonals //The SID's Annual International Conference, Symposium, and Exhibition, 2000, Long Beach, USA: SID, 2000:938-941.[3] Ilmer M, Lecheler R, Schweizer H, et al. Hg-free flat panel light source plan on a promising candidate for future LCD backlights //The SID's Annual International Conference, Symposium, and Exhibition, 2000, Long Beach, USA: SID, 2000:931-933.[4] Kwak M G, Han J I. Mercury-free 18-in flat fluorescent lamp with good uniformity[J]. J. SID, 2001, 9(3):165-168.[5] Beleznai S, Mihajlik G, Maros I, et al. Improving the efficiency of a fluorescent Xe dielectric barrier light source using short pulse excitation[J]. J. Phys. D: Appl. Phys., 2008, 41(11):115202(1-3).[6] Sowa W, Lecheler R, Bldb A, et al. Lamp driver concepts for dielectric barrier discharge lamps and evaluation of a 110 W ballast //39th IAS Annual Meeting. Conference Record of the 2004 IEEE, Seattle, USA:IEEE, 2004:1379-1385.[7] 熊博,刘震,胡文波. 介质阻挡放电平面光源的高频高压电源电路研究[J]. 真空电子技术, 2008,(6):8-12.

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Related Institution

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