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Optical Engineering

Methods of estimating luminous flux of the backlight module by luminance measurement
Author(s): Rong-Fong Fung; Liang-Kang Chang; Chi-Feng Lin
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Paper Abstract

We present several different estimation methods to calculate the total luminous flux and luminous efficiency of a backlight module by using the measurement data from a luminance meter. We used the integrating sphere to measure a backlight module and found the luminous efficiency as 72.232%. With this result as a reference, we compared total luminous efficiencies obtained by five estimation methods, which are based on the luminance distributions along the x axis and y axis and measured by a luminance meter. In addition to these experimental results, we discussed the effect of dividing the luminous region into small areas on faster computations of total luminous flux of a backlight module.

Paper Details

Date Published: 1 January 2007
PDF: 5 pages
Opt. Eng. 46(1) 016402 doi: 10.1117/1.2430501
Published in: Optical Engineering Volume 46, Issue 1
Show Author Affiliations
Rong-Fong Fung, National Kaohsiung First Univ. of Science and Technology (Taiwan)
Liang-Kang Chang, National Kaohsiung First Univ. of Science and Technology (Taiwan)
Chi-Feng Lin, National Ctr. for High-Performance Computing (Taiwan)

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