Radiation from Visual Display Unit

2nd International Conference on Science and Sustainable Development "The Role of Science in Novel Research and Advances in Technology"

自然科学;经济学

Usikalu, M.R.^1 ; Babarimisa, I.O.^1 ; Akinwumi, S.A.^1 ; Akinyemi, M.L.^1 ; Adagunodo, T.A.^1 ; Ayara, W.A.^1

Department of Physics, Covenant University, P.M.B 1023, Ota, Ogun State, Japan^1

关键词: Cell sensor;    Extremely low frequencies;    Liquid crystal display(LCD);    Mean values;    Projector;    Visual display unit;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/173/1/012039/pdf
DOI  :  10.1088/1755-1315/173/1/012039

学科分类：自然科学（综合）

来源: IOP

【 摘 要 】

The radiation from different types of Visual Display Units (VDU) (that is, Liquid Crystal Display (LCD) and Cathode Ray Tube (CRT)), projector and interactive screen were examined using a Cell Sensor Extremely Low Frequency (ELF) detection meter. The study revealed that ELF radiation in CRT VDUs is eight (8) times greater than in LCD VDUs. The mean ELF obtained from interactive screen at 30 cm was 1.6 mG and 1.9 mG at start-up and after 3 hours of use respectively with a mean value of 1.03 mG for a distance of 100 cm at start up. The mean ELF radiation from the projector screen at a distance of 10 cm is 0 mG, while that of interactive screen is 2.4 mG at the same distance. Thus, the study suggested that, projector and screen is better than interactive screen when making presentation considering the closeness of user to the interactive screen throughout the course of presentation.