Progressive dimming method for mercury-free flat fluorescent lamp

Author

Zhen Liu ; Wen-Bo Hu ; Hai-Cheng Wei ; Chun-Liang Liu

Author_Institution

Key Lab. of Phys. Electron. & Devices of the Minist. of Educ., Xi´an Jiaotong Univ., Xi´an, China

Volume

57

Issue

3

fYear

2011

fDate

8/1/2011 12:00:00 AM

Firstpage

990

Lastpage

994

Abstract

A progressive dimming circuit and method for 32 inch mercury-free flat fluorescent lamp (FFL) were presented based on a newly developed FFL, which showed a large operating margin, high luminance and high luminous efficacy in the case of unipolar driving. The proposed dimming circuit is simple in structure and the dimming method is easy to fulfill. The prototype of 32 inch FFL was built and verified. The results show that a progressive dimming can be implemented by pulse density modulation (PDM) method or frequency modulation method and the power consumption can be reduced since the light output of FFL can be controlled progressively. A dimming range about 100% to 6% can be achieved by using the proposed method.

Keywords

fluorescent lamps; frequency modulation; FFL; PDM method; frequency modulation method; high luminance efficacy; high luminous efficacy; mercury-free flat fluorescent lamp; progressive dimming method; pulse density modulation method; size 32 inch; unipolar driving; Anodes; Capacitance; Cathodes; Couplings; Discharges; Fluorescent lamps; Mercury-free flat fluorescent lamp; dielectricbarrier discharge; luminousefficacy; progressive dimming method;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/TCE.2011.6018846

Filename

6018846