Dimming Techniques with High Luminous Conversion Efficacy and Optimal Current Transition Control for HBLED Drivers

Shun Chung Wang*, Hung Yu Pai, Yi Hua Liu

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The current-illuminance characteristic curve of most LEDs is nonlinear. Consequently, under the same lighting power, the PWM dimming cannot obtain the best luminous conversion efficiency that is specified. This paper focuses on the further improvement of LED luminous efficiency and studies current dimming techniques with varied current sensing resistance. A prototype constructed for a 115W LED driver is developed with the devised dimming method realized by a digital signal controller (DSC). Experimental results verify the feasibility and performance. Comparing with conventional PWM dimming, under the same illuminance, the driver average output power is reduced by 17.08 %. The improvement in average illuminance under the same output power is 13.66 %.

Original languageEnglish
Title of host publication4th IEEE International Conference on Knowledge Innovation and Invention 2021, ICKII 2021
EditorsTeen-Hang Meen
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages186-189
Number of pages4
ISBN (Electronic)9781665423076
DOIs
StatePublished - 23 07 2021
Externally publishedYes
Event4th IEEE International Conference on Knowledge Innovation and Invention, ICKII 2021 - Taichung, Taiwan
Duration: 23 07 202125 07 2021

Publication series

Name4th IEEE International Conference on Knowledge Innovation and Invention 2021, ICKII 2021

Conference

Conference4th IEEE International Conference on Knowledge Innovation and Invention, ICKII 2021
Country/TerritoryTaiwan
CityTaichung
Period23/07/2125/07/21

Bibliographical note

Publisher Copyright:
© 2021 IEEE.

Keywords

  • dimming method
  • high brightness light-emitting diode (HBLED)
  • luminous conversion efficacy

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