Methods of estimating luminous flux of the backlight module by luminance measurement

Rong-Fong Fung; Liang-Kang Chang; Chi-Feng Lin

doi:10.1117/1.2430501

1 January 2007 Methods of estimating luminous flux of the backlight module by luminance measurement

Rong-Fong Fung, Liang-Kang Chang, Chi-Feng Lin

Author Affiliations +

Optical Engineering, Vol. 46, Issue 1, 016402 (January 2007). https://doi.org/10.1117/1.2430501

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.

©(2007) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Rong-Fong Fung, Liang-Kang Chang, and Chi-Feng Lin "Methods of estimating luminous flux of the backlight module by luminance measurement," Optical Engineering 46(1), 016402 (1 January 2007). https://doi.org/10.1117/1.2430501

Published: 1 January 2007

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