Desktop lighting for comfortable use of a computer screen

Journal Article (2021)
Author(s)

L. Han (Tianjin University)

Hechen Zhang (Tianjin University)

Zhongxia Xiang (Tianjin University)

Jinze Shang (Tianjin University)

S. Anjani (TU Delft - Human Factors)

W. Song (TU Delft - Mechatronic Design)

P. Vink (TU Delft - Materials and Manufacturing)

Research Group
Human Factors
Copyright
© 2021 L. Han, Hechen Zhang, Zhongxia Xiang, J. Shang, S. Anjani, Y. Song, P. Vink
DOI related publication
https://doi.org/10.3233/WOR-208018
More Info
expand_more
Publication Year
2021
Language
English
Copyright
© 2021 L. Han, Hechen Zhang, Zhongxia Xiang, J. Shang, S. Anjani, Y. Song, P. Vink
Research Group
Human Factors
Issue number
s1
Volume number
68
Pages (from-to)
S209-S221
Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Abstract

BACKGROUND: The contrast between a bright computer screen and a dark ambient environment may influence comfort of the users, especially on their eyes. OBJECTIVE: The objective of this research is to identify the optimal desktop lighting for the comfortable use of the computer screen in a dark environment. METHODS: An experiment was designed where seven illumination setups were introduced for the users to perform their leisure tasks on a computer screen. Fifteen healthy subjects participated in the experiments. During each session, durations of the eye blinks, fixations and saccades of the user were recorded by an eye tracker. His/her neck and trunk movements were recorded by a motion tracking system as well. The comfort/discomfort questionnaire, localized postural discomfort questionnaire, NASA task load index and computer user questionnaire were used to record the overall comfort/discomfort, the local perceived physical discomfort, the cognitive workload, and general/eye health problems, respectively. RESULTS: Subjective and objective measurement results indicated that users felt more comfortable with high intensity warm lights using a computer screen. We also identified that the eye fixation durations, as well as the scores of two questions in the computer user questionnaire, have significant negative correlations with comfort. On the other side, the durations of blinks and the scores of three questions in the computer user questionnaire, were significantly correlated with discomfort. CONCLUSION: The warm (3000K) and high intensity (1500 lux) light reduced the visual and cognitive fatigue of the user and therefore improve the comfort of the user during the use of a computer screen.