Assessing retinal hazardous effects from phosphor converted Light Emitting Diode (LED) lighting with different Correlated Color Temperature (CCT)

Yu Man Shang, Li Ling Lee, Jung Min Hwang, Gen Shuh Wang, Chin Pao Cheng

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

3 Citations (Scopus)

Abstract

Due to the rapid growth in the use of blue-light-based electrical panels and much brighter lighting environments, the socioeconomic impact by retinal light injury is critical. Understanding the material property and mechanisms underlying this hazard is important for both effective and user-friendly product development. The InGaN based blue LED has been applied to excite the yellow phosphor (Y3Al5O12:Ce3+) for white light generation. In this study, custom-made phosphor-converted white light emitting diode (pc-WLED) with correlated color temperature (CCT) ranging from 2700K to 6500K were used for exposure treatments to assess the potential retinal injury. We examined LED induced retinal neuronal cell damage in a rat model through functional and histopathological measurements. Electroretinography (ERG), hematoxylin and eosin (H&E) staining, and transmission electron microscopy (TEM) were used for pathological examinations. The experimental results indicate that blue-rich-LED light could induce more photochemical injury to the retina after the exposure. The results of this study suggest that retinal injury is mainly induced by photosensitizer- and photopigment-mediated oxidative stress with color temperature dependent effect, and users should be more aware of this effect before switching to LED lamps for domestic lighting.

Original languageEnglish
Title of host publicationInnovative Materials
Subtitle of host publicationEngineering and Applications II
EditorsJung Kyu Ahn
PublisherTrans Tech Publications Ltd
Pages112-118
Number of pages7
ISBN (Print)9783038357834
DOIs
Publication statusPublished - 2017 Jan 1
EventInternational Conference on Material Engineering and Application, ICMEA 2016 - Tin Shui Wai, Hong Kong
Duration: 2016 Aug 192016 Aug 21

Publication series

NameKey Engineering Materials
Volume730 KEM
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Other

OtherInternational Conference on Material Engineering and Application, ICMEA 2016
CountryHong Kong
CityTin Shui Wai
Period16/8/1916/8/21

Keywords

  • Phosphor-converted LED
  • Retinal effects
  • Wavelength dependency
  • YAG:Ce

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Assessing retinal hazardous effects from phosphor converted Light Emitting Diode (LED) lighting with different Correlated Color Temperature (CCT)'. Together they form a unique fingerprint.

  • Cite this

    Shang, Y. M., Lee, L. L., Hwang, J. M., Wang, G. S., & Cheng, C. P. (2017). Assessing retinal hazardous effects from phosphor converted Light Emitting Diode (LED) lighting with different Correlated Color Temperature (CCT). In J. K. Ahn (Ed.), Innovative Materials: Engineering and Applications II (pp. 112-118). (Key Engineering Materials; Vol. 730 KEM). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/KEM.730.112