Abstract
In this paper, we evaluated quantitative changes
in the luminance and the color on the light-exit plane of an LED edge-lit
backlight unit (BLU) by systematically controlling the optical properties
of individual white LEDs. We placed a light absorbing film and red-green-blue
filters to control the white intensity and the color of an individual
LED string, respectively. Impacts of this ‘defect’ LED's
optical properties were systematically monitored across the light-exit
plane in terms of local distribution of the luminance and the color,
overlaying prism films and diffusion film on a light guiding plate
(LGP). The roles of prism films and diffusion film were also experimentally
analyzed to assess their homogenizing capability for the luminance
and the color with respect to the defect-like LEDs.
© 2015 IEEE
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