探討LED眩光程度與色溫對於辦公室人員的影響

The Effects of Glare and Correlated Color Temperature of LED Lightings on the Office Worker

王昱婷(Yu-Ting Wang)

指導教授 ： 林瑞豐

元智大學/工程學院/工業工程與管理學系/碩士(2012年)

https://doi.org/10.6838/YZU.2012.00206

摘要

根據過去相關文獻顯示，我們發現大部分研究著重於傳統照明中照度、色溫或顯色指數對於人內心感受或工作之影響，而鮮少學者研究LED照明與眩光、色溫兩者對人工作績效的影響，且LED照明影響人生理反應方面之探討仍相當欠缺，因此本研究主要目的為探討在LED照明下眩光程度與色溫對於辦公室人員之影響。有鑑於此，本研究擬定進行下列兩項實驗，分別使用三種眩光等級(Unified Glare Rating, UGR)和四種色溫值(Correlated Color Temperature, CCT)作為探討因子。兩項實驗皆使用LED作為環境照明，並將實驗場景設為一般辦公室。此外，眩光與色溫實驗分別招募男性大學生九位及八位為受測對象，受測者於實驗過程中將執行一般辦公室作業，除了工作表現與問卷調查外，也同時測量人體的生理參數，其中心跳、皮膚導電反應以及皮膚溫度等參數是為了評估人的覺醒與舒適程度，而閃光融合閾值、眨眼與凝視參數則是用以評估人的眼睛疲勞程度。
研究結果顯示，首先眩光與色溫兩者對於工作表現(包括錯誤率與完成度)、問卷(包括眼睛疲勞、環境感受與工作滿意度)皆無顯著影響。其次，雖然眩光等級增加會使人的警覺程度提高，但壓力與眼睛的疲勞程度也會隨之增加。接著，色溫研究結果顯示，雖然於任何色溫下眼睛皆呈現疲勞，但相較於其他色溫值，色溫為4000 K時，人所承受之壓力最小，且最感到舒適。最後，照明觀感之問卷調查顯示，受測者偏好色溫4000與7000 K的照明環境。此外，透過本研究之結果將有助於改善人類的工作環境和提高照明品質，並提供開發設計LED健康照明之參考。

關鍵字

LED照明 ； 眩光 ； 色溫 ； 工作績效

並列摘要

The most previous of studies considered the effects of illumination, color temperature or color rendering index of traditional lightings on peoples’ feeling of lighting and performance. However, less research studied the effects of glare and color temperature of LED lightings on work performance. Also, the investigations of LED lightings effects on physiological responses ware scarcely. For above reasons, the purpose of this research was to explore the effect of glare and color temperature of LED lightings on the office worker. To achieve this purpose, we developed two experiments that used three different types Unified Glare Rating (UGR) levels and four Correlated Color Temperature (CCT) values as experimental variables, respectively. Both the two experiments were conducted in an office-like experimental room under the LED lightings. Furthermore, we recruited nine male college students as participants in the UGR study, and eight male college students as participants in the CCT study.
In the experiments, participants were asked to execute office-like tasks. The collected data included participants’ measurements of work performance, and questionnaires. Physiological measurements, comprising Heart Rate (HR), Galvanic Skin Response (GSR), Skin Temperature, Critical Fusion Frequency (CFF), Blink Duration, Blink Frequency, Fixation Duration and Fixation Frequency, were used to evaluate participants’ arousal and comfort. And, questionnaires were used to evaluate participants’ eye fatigue, environmental feeling, task satisfaction and lighting impression.
The results of this research showed: First, both UGR and CCT had no significant effects on work performance. Second, even though the higher glare level caused the increased participants’ arousal level it also increased eye fatigue and pressure. Third, the result of the CCT study showed that participants had eyes fatigue under every CCT level. Participants felt less stress and more comfortable while CCT was set at 4000 K than CCT was set at 3000, 5000 and 7000 K. And, the result of questionnaire showed that participants preferred the light set at 4000 and 7000 K. Finally, our research findings would help improve the working environment, lighting quality, and further design healthy LED lightings.

並列關鍵字

work performance ； LED lighting ； glare ； UGR ； color temperature ； CCT

參考文獻

Baron, R. A., Rea, M. S., & Daniels, S. G. (1992). Effects of indoor lighting (illuminance and spectral distribution) on the performance of cognitive tasks and interpersonal behaviors: The potential mediating role of positive affect. Motivation and Emotion, 16(1), 1-33.

Belichambers, H., & Godby, A. (1972). Illumination, colour rendering and visual clarity. Lighting Research and Technology, 4(2), 104-106.

Bodmann, H. (1967). Quality of interior lighting based on luminance. Transactions of the Illuminating Engineering Society, 32, 22-40.

Boyce, P. (1977). Investigations of the subjective balance between illuminance and lamp colour properties. Lighting Research and Technology, 9(1), 11-24.

Boyce, P., & Cuttle, C. (1990). Effect of correlated colour temperature on the perception of interiors and colour discrimination performance. Lighting Research and Technology, 22(1), 19-36.