| Title |
Occupants' Visual Sensitivity According to the Illuminance Fluctuations of the Office Space |
| Authors |
류지혜(Ryu, Ji-Hye) ; 김성경(Kim, Sung-Kyung) ; 김인혜(Kim, In-Hye) ; 홍원화(Hong, Won-Hwa) |
| DOI |
https://doi.org/10.5659/JAIK.2023.39.4.183 |
| Keywords |
Office Space; Illuminance Fluctuations; Perceived Brightness; Visual Sensitivity; Visual Comfort |
| Abstract |
From the perspective of a lighting user, changes in illuminance can be recognized and visual fatigue increases as the range of change
increases while visual satisfaction decreases. In this study, when the indoor illuminance level was controlled with four set illuminance levels
of 300lx, 400lx, 500lx, and 700lx, the visual comfort of lighting users was analyzed as it relates to the measured illuminance value,
illuminance preference, eye fatigue, and sensibility based on the brightness questionnaire. Visual sensitivity was derived from the change in
the perceived brightness response of a lighting user according to the change in illuminance. As a result of the visual comfort analysis, the
illuminance preference desired by occupants differed according to the set illuminance. The lower the setting illuminance, the clearer the
tendency to prefer bright illuminance. There was a difference in the degree of eye fatigue affected by various factors. In the case of
perceived brightness, it was investigated that as the set illuminance was higher, the perceived brightness at the same overall illuminance was
relatively dark. In the case of the set illuminance 700lx, it was found that the illuminance was intuitively perceived as bright. As a result of
the occupant's sensitivity analysis according to the change in illuminance, it revealed an illuminance change of 74.9lx (300lx), illuminance
change of 63lx (400lx), illuminance change of 111.7lx (500lx), and illuminance change of 51.2lx (700lx). In this case, it was found that the
lighting user could visually perceive the change in brightness for the first time. As a result of deriving visual sensitivity through regression
analysis, it revealed that the higher the setting illuminance, the lower the visual sensitivity. |