Lighting for projector use in school classrooms to improve visibility

Sheng Peng, Yawen Chen, Xiaodan Tang, Ingrid Heynderickx

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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.

Original languageEnglish
Title of host publication2014 11th China International Forum on Solid State Lighting, SSLCHINA 2014
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Pages9-13
Number of pages5
ISBN (Electronic)978-1-4799-6697-4
ISBN (Print)978-1-4799-6696-7
DOIs
Publication statusPublished - 1 Jan 2014
Event2014 11th China International Forum on Solid State Lighting, SSLCHINA 2014 - Guangzhou, China
Duration: 6 Nov 20148 Nov 2014

Conference

Conference2014 11th China International Forum on Solid State Lighting, SSLCHINA 2014
CountryChina
CityGuangzhou
Period6/11/148/11/14

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