Hyouk Kwon et al 2008 J. Micromech. Microeng. 18 065003 doi:10.1088/0960-1317/18/6/065003
Hyouk Kwon1, Youngjoo Yee1, Chi-Hwan Jeong1, Hyo-Jin Nam1 and Jong-Uk Bu2
Show affiliationsThis paper reports a novel high-sag microlens array (MLA) film with a full fill factor and presents its application to organic light emitting diodes (OLEDs) for the purpose of improving their outcoupling efficiency. A gapless hexagonal MLA film having a high sag ratio is proposed and fabricated by a simple micromachining process including trench formation and the conformal vapor phase deposition of a polymer. By applying the MLA films to OLED panels, the outcoupling efficiency was increased by a maximum of 48% without any apparent color shift. A high-sag MLA film with a full fill factor is expected to impart remarkable optical efficiency to various display or lighting applications with flat panel light sources including OLEDs.
85.60.Jb Light-emitting devices
Issue 6 (June 2008)
Received 22 January 2008, in final form 20 March 2008
Published 25 April 2008
Hyouk Kwon et al 2008 J. Micromech. Microeng. 18 065003
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