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KMID : 1159320120140030189
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Korean Journal of Vision Science
2012 Volume.14 No. 3 p.189 ~ p.195
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Effects of Correlated Color Temperature of LED Light Sources and Illumination on Visual Performance at Near
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Jeong Kyeong-In
Lee Cheol-Woo
Son Woo-Jin
Sung Yu-Jin
Sun Jung-Soon
Ryu Geun-Chang
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Abstract
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Purpose : To evaluate the effect of correlated color temperature of LED light sources and illumination on Visual Performance at Near.
Methods : The subjects of this study were 19 male and female college students(23.05±2.25years) with corrected visual acuity 1.0 and they didn’t have any eye surgery history and eye disease. The color temperature of LED light sources used in this study were 3,500K, 5,600K, 7,500K. The accuracy and the required time of each light source on error correction work and reading work were measured. The lux of working surface was 400 lux and 700 lux each.
Result : The time required for reading work has been reduced significantly from both illumination in 7,500K. The required time of error correction work has been reduced for each 400 lux and 700 lux in 5,600K. The accuracy was lowest in 7,500K and it has been shown a reducing tendency on 400 lux compared with 700 lux in every color temperature.
Conclusion : The time and accuracy of error correction work were shown a changing tendency depending on the illumination and color temperature didn’t significantly differ. However the time required for reading work has been reduced significantly from both illumination in 7,500K. Thus, it is necessary to determine the appropriate color temperature of the LED lights for the improvement of visual performance at near.
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KEYWORD
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Illumination, LED, Correlated Color Temperature, Near, Visual Performance
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