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Study of image improvement for an organic light emitting diode using an iodide-polarizer

WEN JENG LAN1, HO SHING WU1,*

Affiliation

  1. Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan, 32003, Taiwan

Abstract

An Organic Light Emitting Diode (OLED) can reduce visual reflective sensitivity and improve the contrast ratio, color saturation and view angle chromatism from ambient light. The presented application uses a mature and convenient method to examine the image improvement of an Organic Light Emitting Diode, which is an iodide-polarizer utilized on the panel of an OLED. In Flat Panel Displays (FPDs), many key vision indexes indicate the image performance including visual reflective sensitivity, contrast ratio, color saturation, view angle, pixel solution, brightness, response time and so on. In this study, an iodide-polarizer was applied to the panel of an OLED and experiments were conducted to examine the visual reflective sensitivity, contrast ratio, color chromatism and color saturation for the above relative key indexes of image performance. The results clearly show the excellent performance in reducing visual reflective sensitivity by 91.2% in the best sensitivity region of human eyes (525~580nm), improving the contrast ratio of the image 5.1 and 6.1 times in a simulated indoor ambience (490 cd/m2 ) and a simulated outdoor ambience (1375 cd/m2 ), retarding color chromatism decay from 48% to 27.5% in the simulated indoor ambient light (490 cd/m2 ) and color chromatism decay from 69.9% to 38.1% in the simulated outdoor ambient light (1375 cd/m2 ), and achieving 24% and 42.5% more color saturation when tilting a large degree view angle (at 70o ) for a simulated indoor ambience (490 cd/m2 ) and a simulated outdoor ambience (1375 cd/m2 ), respectively..

Keywords

Organic light emitting diode, Iodide-polarizer, Visual reflective sensitivity, Contrast ratio, Color Saturation, View Angle.

Submitted at: Aug. 9, 2010
Accepted at: May 25, 2011

Citation

WEN JENG LAN, HO SHING WU, Study of image improvement for an organic light emitting diode using an iodide-polarizer, Journal of Optoelectronics and Advanced Materials Vol. 13, Iss. 5, pp. 497-504 (2011)