School of Mechanical Engineering, Tianjin University, China.
Faculty of Industrial Design Engineering, Delft University of Technology, The Netherlands.
Work. 2021;68(s1):S209-S221. doi: 10.3233/WOR-208018.
The contrast between a bright computer screen and a dark ambient environment may influence comfort of the users, especially on their eyes.
The objective of this research is to identify the optimal desktop lighting for the comfortable use of the computer screen in a dark environment.
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.
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.
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.
明亮的电脑屏幕与昏暗的环境之间的对比可能会影响用户的舒适度，尤其是对他们的眼睛。
本研究旨在确定在昏暗环境中使用计算机屏幕的最佳桌面照明。
设计了一项实验，其中为用户引入了七种照明设置，以在计算机屏幕上执行他们的休闲任务。十五名健康受试者参加了实验。在每次会话中，通过眼动追踪器记录用户的眨眼、注视和扫视持续时间。他/她的颈部和躯干运动也通过运动跟踪系统记录。使用舒适度/不舒适度问卷、局部姿势不舒适度问卷、NASA 任务负荷指数和计算机用户问卷分别记录整体舒适度/不舒适度、局部感知身体不舒适度、认知工作量以及一般/眼睛健康问题。
主观和客观测量结果表明，用户在使用计算机屏幕时，高强度暖色灯光感觉更舒适。我们还发现，眼睛注视持续时间以及计算机用户问卷中的两个问题的得分与舒适度呈显著负相关。另一方面，眨眼持续时间以及计算机用户问卷中的三个问题的得分与不舒适度显著相关。
暖色（3000K）和高强度（1500 勒克斯）的灯光减少了用户的视觉和认知疲劳，从而提高了用户在使用计算机屏幕时的舒适度。
