Abstract
White light LEDs are playing a more and more important role
in display in various structures. Here, a new modeling algorithm is
proposed for use in phosphor-converted white light-emitting diodes
(pcW-LEDs); the algorithm can be used to accurately simulate color
appearances, potentially enabling optical designers to remove yellowish/bluish
spots in LED lighting. The proposed modeling method was applied to
simulate a pcW-LED without an encapsulation lens, and subsequently,
a pcW-LED with a hemispherical lens. Both simulations accurately predicted
the blue and yellow light distribution. The model was further verified
by applying a total internal reflector lens to the pcW-LED. In the
midfield region, the blue and yellow light distribution exhibited
large variations as the observation distance changed; this varying
light pattern for both the blue and yellow lights can be accurately
predicted using the proposed model. The developed optical model should
facilitate designing a pcW-LED that features high-quality illumination
and increased color uniformity.
© 2014 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription