A method for measuring the light output of video advertising reproduced by LED billboards. (May 2019)

• Record Type: Journal Article
• Authors: Fiorentin, Pietro; Boscaro, Federico
• Is Part Of: Measurement. Volume 138(2019)
• Page Start: 25
• Page End: 33
• Publication Date: 2019-05
• Subjects: Light-emitting diode displays -- Photometry -- Video recording -- Image analysis -- CCD image sensors -- Luminance -- Glare; Weights and measures -- Periodicals; Measurement -- Periodicals; Measurement; Weights and measures; Periodicals; 530.8
• DOI: 10.1016/j.measurement.2019.02.021
• Languages: English
• ISSNs: 0263-2241

Abstract

Highlights: Method for luminance measurement on LED billboards playing advertising video clips. Experimental results on real billboard and advertising video clips. Advertising videos have an average luminance around 11% of the maximum billboard luminance. Advertising videos have a peak luminance of about 35% of the maximum billboard luminance. Information for billboard manufacturers, regulatory and control bodies for road safety. Abstract: Improving knowledge of the light output of digital billboards is important to better assess their effect on driver distraction when they are installed along roads. In this work the emission of an LED based billboard is measured when playing advertising video-clips. In particular the average and the maximum values of the luminance are evaluated. The same video-clips are also analyzed when shown on an LCD monitor, aiming at separating the variability of the videos and of the playing device. The results allow to evaluate an utilization factor of the billboard: the videos have an average luminance around 11% and a peak luminance of 35% of the maximum luminance obtainable from the billboard. The power consumption of the billboard is measured, aside the photometric analysis. The luminance of the device are found linearly dependent on both the power and the effective current absorbed by the device from the grid, with a discrepancy within 6%. It could be a useful information for billboard manufacturers to qualify their product when they do not own photometric instruments.