Journal of South China University of Technology (Natural Science Edition) ›› 2015, Vol. 43 ›› Issue (4): 138-142.doi: 10.3969/j.issn.1000-565X.2015.04.020

• Physics • Previous Articles     Next Articles

Effects of LED Lights with Different Colors on Human Electrocardiogram Under Extremely Low Illumination

Zhou Xiao-ming Xu Jia-bin Shao Zhi-dong   

  1. School of Physics//Sate Key Laboratory of Subtropical Building Science，South China University of Technology，Guangzhou 510640，Guangdong，China
  • Received:2014-04-22 Revised:2014-12-03 Online:2015-04-25 Published:2015-03-03
  • Contact: 周晓明(1963-)，男，博士，教授，主要从事物理场生物效应和大学物理实验教学与研究． E-mail:zhouxm@scut.edu.cn
  • About author:周晓明(1963-)，男，博士，教授，主要从事物理场生物效应和大学物理实验教学与研究．
  • Supported by:
    Supported by the Foundation of the State Key Laboratory of Subtropical Building Science(2013KA02) and the Strategic Emerging Industry Special Funds of Guangdong Province(2012A080304015)

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Abstract: On the basis of the biological equivalent theory，the control variable method is used to measure the elec-trocardiograms (ECGs) of testees under low-illumination LED lights with different colors and to explore the corre-sponding non-visual biological effect on human body’s physiological function． The results show that low-illumina-tion light source has certain effect on human electrocardiograms; and that the wavelength of low-illumination light source influences human ECG parameters． For instance，blue light significantly speeds up human heart rate while red and green lights have relatively greater effect on the depolarization and repolarization of the ventricle． Moreover，it is also found that both the depolarization time and the repolarization time increase under the illumination of these three kinds of light sources．

Key words: non-visual biological effect, LED, biological equivalent, wavelength, electrocardiogram