Microlens array diffuser for a light-emitting diode backlight system
Optics Letters, Vol. 31, Issue 20, pp. 3016-3018 (2006)
http://dx.doi.org/10.1364/OL.31.003016
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Abstract
Microlens array (MLA) diffusers for light-emitting diode (LED) backlight systems have been developed. A high fill-factor photoresist mold for the MLA was fabricated using three-dimensional diffuser lithography, and the patterns were transferred to a nickel master mold for UV-curable polymer replication. The fabricated microlens had various paraboloidal profiles, and its aspect ratio was controlled from 1.0 to 2.1. The MLA diffuser showed a batwing radiation pattern with a radiation angle of 150°. The fabricated MLA diffuser may greatly enhance the color-mixing characteristics of LED backlight systems and help reduce the number of LEDs required.
© 2006 Optical Society of America
OCIS Codes
(230.3990) Optical devices : Micro-optical devices
(230.4000) Optical devices : Microstructure fabrication
(350.3950) Other areas of optics : Micro-optics
ToC Category:
Optical Devices
History
Original Manuscript: May 17, 2006
Revised Manuscript: July 16, 2006
Manuscript Accepted: July 20, 2006
Published: September 25, 2006
Citation
Sung-Il Chang, Jun-Bo Yoon, Hongki Kim, Jin-Jong Kim, Baik-Kyu Lee, and Dong Ho Shin, "Microlens array diffuser for a light-emitting diode backlight system," Opt. Lett. 31, 3016-3018 (2006)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-31-20-3016
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