Abstract
An organic light-emitting device (OLED) is coupled with inorganic LEDs to
strengthen the OLED's weak point (i.e., low luminous intensity). To this
end, side-view LED bars are deployed on the sides of the glass substrate of
OLED. To extract not only OLED light but also LED light from the glass
substrate, a microlens array (MLA) film is attached to the outer surface of
the glass substrate. It is found by experiments that the LED light intensity
from the emission area of OLED is relatively low, compared with the OLED
light intensity. Moreover, the LED light distribution is shown to be highly
non-uniform. To tackle those problems, we introduce a scattering layer at
the outer surface of the glass substrate. It is demonstrated by simulations
that the luminous intensity and spatial uniformity of the LED light can be
significantly enhanced with the aid of the scattering layer configuration
where the scattering particle density is stepwisely varied.
© 2011 IEEE
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