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Study of preferred background luminance in watching computer screen in children

摘要:

Background In recent years,computers have been intensively used at home.In contrast to paper-based books and documents,computer screen is self-illuminated with larger screen-background luminance difference,which greatly induces visual discomfort.To compensate for that,one effective solution is to offer an additional background luminance.In this study,we investigated whether and to what extent additional background lighting is needed in looking at a computer display comfortably.Methods In this study,60 healthy children aged from 9 to 12 years and 58 adults aged from 21 to 39 years participated in the experiments.They were asked to choose their most preferred background luminance intensities at three screen luminance levels.The data were analyzed by Matlab (R2012b) and SPSS 20.0.Results Both children and adult participants selected a non-dark background as their comfortable lighting condition when watching a computer display (children:t (59)=22.0,P <0.01,adults:t (57)=15.5,P <0.01).Comparatively,children preferred brighter background in general (F (1,116)=7.0,P <0.01).More importantly,participants' preferred background luminance levels were linearly correlated with screen luminance intensities (children:slope=0.97,R2=0.98; adults:slope=0.38,R2=1.00).Conclusion These results indicate that varying background luminance to maintain screen-background luminance ratio is beneficial to human visual comfort.

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作者单位: Department of Ophthalmology, Eye and Ear, Nose and Throat Hospital, Fudan University, Shanghai 200031, China [1] Philips Research China, Shanghai 200233, China [2]
期刊: 《中华医学杂志(英文版)》2014年127卷11期 2073-2077页 SCIMEDLINEISTICCSCDBP
栏目名称: ORIGINAL ARTICLES
DOI: 10.3760/cma.j.issn.0366-6999.20133232
发布时间: 2014-06-30
基金项目:
This study was supported by a grant from the Key Project of Science and Technology of Shanghai
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