An Improved Digital-Dimming Controller for Back-light Module Applying Frequency-Shift Technique

Chang Hua Lin, Liang Rui Chen, Kai Jun Pai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

A novel simple control method to improve the ignition behavior of cold cathode fluorescent lamp in digital-dimming mode is proposed in this paper. The half-bridge resonant inverter is employed in the presented back-light system. To extend the lamp life, we realize a digital-dimming controller with frequency-shift technique (DDC-FST) to reduce the high ignition voltage and to eliminate the ignition current spike. Complete analysis and design considerations are discussed in detail in this paper. Simulation and experimental results are close to the theoretical prediction. The overall efficiency of the system achieved at the rated power is over 91%. The ignition voltage is reduced about 30% without any lamp current spike occurred under digital-dimming operation.

Original languageEnglish
Title of host publicationIECON Proceedings (Industrial Electronics Conference)
Pages496-501
Number of pages6
Volume1
Publication statusPublished - 2003 Dec 1
EventThe 29th Annual Conference of the IEEE Industrial Electronics Society - Roanoke, VA, United States
Duration: 2003 Nov 22003 Nov 6

Other

OtherThe 29th Annual Conference of the IEEE Industrial Electronics Society
CountryUnited States
CityRoanoke, VA
Period03-11-0203-11-06

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All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

Cite this

Lin, C. H., Chen, L. R., & Pai, K. J. (2003). An Improved Digital-Dimming Controller for Back-light Module Applying Frequency-Shift Technique. In IECON Proceedings (Industrial Electronics Conference) (Vol. 1, pp. 496-501)