A balancing strategy and implementation of current equalizer for high power LED backlighting

Chang Hua Lin; Tsung You Hung; Chien Ming Wang; Kai Jun Pai

doi:10.1109/PEDS.2007.4487925

A balancing strategy and implementation of current equalizer for high power LED backlighting

Chang Hua Lin^*, Tsung You Hung, Chien Ming Wang, Kai Jun Pai

^*Corresponding author for this work

Undergraduate Program of Vehicle and Energy Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

28 Citations (Scopus)

Abstract

This paper presents a current equalizer to balance the driving currents for high power LEDs (light emitting diode). The proposed strategy combined PWM strategy and digital dimming control to achieve the same illumination for each driven diodes. To obtain the same average current, the duty cycle of LEDs is modulated according to its current amplitude instead of traditional current amplitude adjusting. Complete mathematical analysis and design considerations are detailed. The experimental results are close to the theoretical predictions, and the measured tolerance errors are all below 4%.

Original language	English
Title of host publication	7th International Conference on Power Electronics and Drive Systems, PEDS 2007
Pages	1613-1617
Number of pages	5
DOIs	https://doi.org/10.1109/PEDS.2007.4487925
Publication status	Published - 2007
Event	7th International Conference on Power Electronics and Drive Systems, PEDS 2007 - Bangkok, Thailand Duration: 2007 Nov 27 → 2007 Nov 30

Publication series

Name	Proceedings of the International Conference on Power Electronics and Drive Systems

Conference

Conference	7th International Conference on Power Electronics and Drive Systems, PEDS 2007
Country/Territory	Thailand
City	Bangkok
Period	2007/11/27 → 2007/11/30

Keywords

Backlighting
Balancing strategy
Current equalizer
High power LED

ASJC Scopus subject areas

Electrical and Electronic Engineering

Access to Document

10.1109/PEDS.2007.4487925

Cite this

Lin, C. H., Hung, T. Y., Wang, C. M., & Pai, K. J. (2007). A balancing strategy and implementation of current equalizer for high power LED backlighting. In 7th International Conference on Power Electronics and Drive Systems, PEDS 2007 (pp. 1613-1617). Article 4487925 (Proceedings of the International Conference on Power Electronics and Drive Systems). https://doi.org/10.1109/PEDS.2007.4487925

A balancing strategy and implementation of current equalizer for high power LED backlighting. / Lin, Chang Hua; Hung, Tsung You; Wang, Chien Ming et al.
7th International Conference on Power Electronics and Drive Systems, PEDS 2007. 2007. p. 1613-1617 4487925 (Proceedings of the International Conference on Power Electronics and Drive Systems).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Lin, CH, Hung, TY, Wang, CM & Pai, KJ 2007, A balancing strategy and implementation of current equalizer for high power LED backlighting. in 7th International Conference on Power Electronics and Drive Systems, PEDS 2007., 4487925, Proceedings of the International Conference on Power Electronics and Drive Systems, pp. 1613-1617, 7th International Conference on Power Electronics and Drive Systems, PEDS 2007, Bangkok, Thailand, 2007/11/27. https://doi.org/10.1109/PEDS.2007.4487925

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title = "A balancing strategy and implementation of current equalizer for high power LED backlighting",

abstract = "This paper presents a current equalizer to balance the driving currents for high power LEDs (light emitting diode). The proposed strategy combined PWM strategy and digital dimming control to achieve the same illumination for each driven diodes. To obtain the same average current, the duty cycle of LEDs is modulated according to its current amplitude instead of traditional current amplitude adjusting. Complete mathematical analysis and design considerations are detailed. The experimental results are close to the theoretical predictions, and the measured tolerance errors are all below 4%.",

keywords = "Backlighting, Balancing strategy, Current equalizer, High power LED",

author = "Lin, {Chang Hua} and Hung, {Tsung You} and Wang, {Chien Ming} and Pai, {Kai Jun}",

year = "2007",

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language = "English",

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N2 - This paper presents a current equalizer to balance the driving currents for high power LEDs (light emitting diode). The proposed strategy combined PWM strategy and digital dimming control to achieve the same illumination for each driven diodes. To obtain the same average current, the duty cycle of LEDs is modulated according to its current amplitude instead of traditional current amplitude adjusting. Complete mathematical analysis and design considerations are detailed. The experimental results are close to the theoretical predictions, and the measured tolerance errors are all below 4%.

AB - This paper presents a current equalizer to balance the driving currents for high power LEDs (light emitting diode). The proposed strategy combined PWM strategy and digital dimming control to achieve the same illumination for each driven diodes. To obtain the same average current, the duty cycle of LEDs is modulated according to its current amplitude instead of traditional current amplitude adjusting. Complete mathematical analysis and design considerations are detailed. The experimental results are close to the theoretical predictions, and the measured tolerance errors are all below 4%.

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KW - Balancing strategy

KW - Current equalizer

KW - High power LED

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A balancing strategy and implementation of current equalizer for high power LED backlighting

Abstract

Publication series

Conference

Keywords

ASJC Scopus subject areas

Access to Document

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