Abstract
To further improve the luminous efficiency of LED lightings, this
Letter proposes a chip-on-board (COB) device by combining diced staggered
V-shaped patterns and remote phosphors. The results show that the V-shaped
patterned COB (V-COB) with vertex angles from 120º to 150º can achieve a
∼17% output power increase (OPI) compared to the conventional COB. V-COB
remote phosphor devices (RPDs) are then manufactured and tested. The
luminous efficiency of the proposed RPD represents an 11.6% increase at
the correlated color temperature of ∼3000 K. Such an improvement can be
attributed to both the decreases of total internal reflections and
phosphor backscatterings.
© 2017 Chinese Laser Press
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