RELATIONSHIP BETWEEN DISCOMFORT GLARE AND ELECTROENCEPHALOGRAPHY DURING WORKING IN FRONT OF A WINDOW

Abstract

It is important to consider discomfort glare in designing comfortable office environment. Architectural Institute of Japan has set UGR and PGSV as design criteria for discomfort glare, but those indicators do not completely reflect the needs for lighting environments due to differences in work behavior. For example, when performing a task that requires concentration, worker may prefer a glare environment to increase one's level of alertness. From the subjective glare and the degree of awakening during work behavior, it is considered necessary to examine the method of indicators that are more suited to actions. Therefore, we focused on the relationship between discomfort glare and EEG, and conducted two experiments with different presentation luminance range. The number of subjects was 10 (5 males and 5 females) in both Experiments 1 and 2, and the age were 21-24 in Experiment 1 and 22-25 in Experiment 2. The experiments were conducted in a space with simulated windows, assuming an office space. The experimental factors were luminance levels of the window and subject' conditions ("Task" is the task of looking at the monitor and doing the calculation work, and "No task" is a task to view the monitor without doing anything). In Exp. 1, luminance levels of the window were 2000, 8000, 14000, 20000 cd/m2, and in Exp. 2, 2000, 5000, 8000, 14000 cd/m2. The measurement indexes were EEG, GSV, and subjective evaluations.