To enhance light extraction of OLED devices by multi-optic layers including a micro lens array

Abstract

In recent years, OLED has advantages including that larger light area, thinner thickness, excellent light uniformity, and can be as a flexible light source. Many display panel and lighting have been started to use the OLED due to OLED without back light system, thus how to make and employ light extracting layer could be important issue to enhance OLED brightness. The purpose of this study is to enhance the light extraction efficiency and light emitting area of OLED, so the micro lens array and the prism reflection layer were provided to enhance the surface light extracting efficiency of OLD. Finally the prism layer and diffusing layer were used to increase the uniformity of emitting area of OLED, which the efficiency of 31% increasing to compare with the OLED without light extracting film.

P-112: To Enhance Light Lumination of OLED Lighting by Film Included Fish Scales

“…The optical film attached to the OLED surface could increase light extraction efficiency of OLED and light color rendering [4]. Kuo [5] et.al used PDMS, which was being used to fabricate micro-lens array include diffusion, prism and the reflection of structure film, was attached to the OLED emitting surface to increase the efficiency of OLED light up to 33%. PDMS, which was used as an optical film base material, which doped two kinds of micro metal oxide particles to enhance light extraction efficiency up to 80% [6].…”