Image Quality and Light Efficiency Enhancement of Organic Light-Emitting Devices by Using Microstructure Attachment
Date Issued
2007
Date
2007
Author(s)
Lin, Tsung-Yu
DOI
en-US
Abstract
In this thesis, we set up a simulation model of organic light-emitting devices (OLED) with microstructure attachment. We demonstrated the simulation model and ray tracing analysis with the optical software LightTools TM.
In order to improve the out coupling efficiency, we considered the total internal reflection (TIR) between air and substrate interface is a key place to be modified. We apply the micro-pyramid array to organic light-emitting devices (OLED) to reduce the total internal reflection (TIR) between air and substrate interface. Instead of merely concerning the efficiency for lighting purposes, we must take both the light extraction efficiency and image quality into account for display applications.
In this simulation, we modulate some parameters such as base width, base angle, fill factor and arrangement of perfect micro-pyramid and truncated micro-pyramid, and try to find out the effects on angular intensity distribution, total power enhancement, and blurred image of the OLED. Finally we bring up several new microstructures and arrangement to control the blur effect and increase light extraction efficiency significantly.
Subjects
微透鏡
金字塔
微結構
有機發光元件
mcirolens
micropyramid
OLED
microstructure
Type
thesis
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