Experimental Investigation About Visual Comfort Based on Evoked Potentials
- 204 Downloads
This study aims to investigate the effect of light on visual comfort. Experiments had been carried out in a climate chamber. The experiments contained three color temperature levels (3000, 4000 and 5700 K) and three illuminance levels (100, 300 and 500 lx). Sixteen subjects participated in the experiments. Subjects’ visual comfort was evaluated by questionnaires, including brightness, joviality, color authenticity, relaxation, and alertness. Visual evoked potentials were measured to evaluate the transmission of visual nerve pathways. The entropy method was used to determine the weight of the subjective indicators. The results showed that the light environment of 300 lx and 5700 K color temperature is the most comfortable environment. The latency of P100 was minimal when the illuminance was 500 lx under 3000 K, which indicated the nervous system reflects the fastest in this light environment. This study is beneficial to improving indoor environmental workplace satisfaction.
KeywordsLight environment Visual comfort Visual evoked potentials Color temperature Illuminance
The project is supported by National Natural Science Foundation (Number 51778305).
- 2.Van Bommel, W.J.: Non-visual biological effect of lighting and the practical meaning for lighting for work. Appl. Ergon. 37(4), 461–466 (2006)Google Scholar
- 3.Sugimoto, S., Ikeda, I.: Physiological effects of illumination levels in a room (Part 2). Mem. Sagami Inst. Technol. 18(1), 35–40 (1984)Google Scholar
- 4.Sato, M., et al.: Physiological and psychological effects of illuminance in an office space. J. Illum. Eng. Inst. Jpn. 80 (1996)Google Scholar
- 6.Veitch, J.A., Newsham, G.R.: Lighting quality and energy-efficient effects on task performance, mood, health, satisfaction and comfort. J. Illum. Eng. Soc. 27(1), 107–130 (1998)Google Scholar
- 7.Shamsul, M.T.B., et al.: Alertness, visual comfort, subjective preference and task performance assessment under three different light’s colour temperature among office workers. In: Advanced Engineering Forum, pp. 77–82 (2013)Google Scholar
- 10.Fleischer, S., et al.: Effect of brightness distribution and light colours on office staff. In: The Ninth European Lighting Conference, Proceeding Book of Lux Europa, Reykjavik, pp. 77–80 (2001)Google Scholar
- 11.Rautkylä, E., et al.: Effects of Artificial Light Spectrum on Alertness: Vava—Field Study. Report 54, Lighting unit, Helsinki University of Technology (2008)Google Scholar
- 12.Laxhmi, C.S., et al.: Non-visual effects of light on melatonin, alertness and cognitive performance: can blue-enriched light keep us alert? PLoS ONE 6(1), e16429 (2011)Google Scholar
- 13.Halonen, L., et al.: Guidebook on Energy Efficient Electric Lighting for Buildings: Chapter 3: Lighting Quality. Aalto University School of Science and Technology, Finland, pp. 41–56 (2010)Google Scholar
- 14.Viola, et al.: Blue-enriched white light in the workplace improves self-reported alertness, performance and sleep quality. Scand. J. Work Environ. Health, 297–306 (2008)Google Scholar
- 15.Jasper, H.: Report of the committee on methods of clinical examination in electroencephalography. Electroen. Clin. Neuro. 10(2), 370–375 (1958)Google Scholar