AVS Forum Special Member
Join Date: Feb 2002
Location: Denver, CO metro area, www.cinemaquestinc.com
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A black surface looks that way because it is not reflecting light. I would suggest a medium, neutral, matte, gray surface. The goal is reflected illumination that is perceived as 10% or less of the peak white produced by the TV after it is calibrated for dark room viewing. The older SMPTE recommendation was 10% of peak white. The recently revised SMPTE standard is 5 nits (candellas per square meter) +/- 0.5 nits. This is not a perceptual percentage but must be measured with a spot luminance meter or spectroradiometer.
The uniform aesthetic appearance of the illumination is not important for achieving the technical benefits of bias lighting. Viewer focus should be on the program being displayed on the TV rather than the surround behind. However, some people like to achieve the uniform appearance out of a sense of aesthetic.
Best regards and beautiful pictures,
G. Alan Brown, President
SMPTE, THX, ISF, Lion AV Consultants
"Advancing the art and science of electronic imaging"