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2014 11th China International Forum on Solid State Lighting (SSLCHINA)最新文献

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Lighting for projector use in school classrooms to improve visibility 用于学校教室投影仪的照明，以提高能见度
2014 11th China International Forum on Solid State Lighting (SSLCHINA) Pub Date : 1900-01-01 DOI: 10.1109/SSLCHINA.2014.7127209
Sheng Peng, Yawen Chen, X. Tang, I. Heynderickx
{"title":"Lighting for projector use in school classrooms to improve visibility","authors":"Sheng Peng, Yawen Chen, X. Tang, I. Heynderickx","doi":"10.1109/SSLCHINA.2014.7127209","DOIUrl":"https://doi.org/10.1109/SSLCHINA.2014.7127209","url":null,"abstract":"Projectors have become very popular in school classrooms in China. However traditional lighting design does not consider lighting influence on the visibility of projection screen. The aim of this study was to investigate the current lighting conditions in classrooms when watching a projection screen, and then to search for lighting conditions providing better visibility. A survey was carried out to collect desk illuminance, projection screen luminance and contrast from eight schools in four cities in China. Based on the survey, an experiment was designed and performed with three ambient illumination conditions (i.e., 0lux, 300lux, daylight), five different projection screen luminance levels (i.e., 50, 100, 150, 200, 260 cd/m2), and five seating positions. The results indicate that the ambient illumination, the projection screen luminance, and the seating position all have a significant influence on the visibility of gratings on the projection.","PeriodicalId":361141,"journal":{"name":"2014 11th China International Forum on Solid State Lighting (SSLCHINA)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134290490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The effect of spacing between luminaires on visual comfort 灯具间距对视觉舒适度的影响
2014 11th China International Forum on Solid State Lighting (SSLCHINA) Pub Date : 1900-01-01 DOI: 10.1109/SSLCHINA.2014.7127228
Fan Lu, Y. Tu, Jihuang Zhang, Lu Liu, Lili Wang, Sheng Peng, I. Heynderickx
{"title":"The effect of spacing between luminaires on visual comfort","authors":"Fan Lu, Y. Tu, Jihuang Zhang, Lu Liu, Lili Wang, Sheng Peng, I. Heynderickx","doi":"10.1109/SSLCHINA.2014.7127228","DOIUrl":"https://doi.org/10.1109/SSLCHINA.2014.7127228","url":null,"abstract":"Using luminaires with high luminance efficiency may reduce the required number of luminaire installations in the ceiling, and as such effectively decrease the cost and save energy. However, it may also result in a negative effect on visual comfort. In this paper, we describe a subjective experiment to investigate the effect of spacing between luminaires on visual comfort. Results show that it's possible to arrange luminaires with high luminance efficiency at a larger spacing, while still achieving lighting of comparable comfort and of similar perceived space brightness, when controlling the average horizontal illuminance of the lighting on the working area.","PeriodicalId":361141,"journal":{"name":"2014 11th China International Forum on Solid State Lighting (SSLCHINA)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133798076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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