"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Study for visual color improvement for an organic light emitting diode using a dye-circular-polarizer

WEN JENG LAN1, HO SHING WU1,*

Affiliation

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

Abstract

There are many key vision indexes that can be used to indicate the visual performances of Flat Panel Displays (FPDs), such as visual sensitivity, contrast ratio, color saturation, viewing angle chromatism, pixel solution and brightness. An Organic Light Emitting Diode (OLED) will be reduced the visual performances by ambient light, including visual sensitivity, contrast ratio, color saturation and viewing angle chromatism. The present study investigated the visual color performances of an organic light emitting diode which is based on the thin-film reflective simulation and commission international de l’Eclairage (CIE) photopic luminous efficiency curve (visual factor) to choose the adaptive optical film. After the simulation and calculation, the presented application uses a mature and convenient method to examine the image color improvement of an OLED that uses a dye-circular-polarizer on the panel. The results clearly showed the excellent performance in improving visual sensitivity by 79.1% in the visual sensitivity region of human eyes (400~700nm), increasing more 12% color saturation in dark, reinforcing the weaknesses of the red and blue organic fluorescent materials, retarding color-chromatism-decay from 48% to 25.4% in the simulated indoor ambient light (490 cd/m2) and from 69.9% to 45.8% in the simulated outdoor ambient light (1375 cd/m2), improving more 40% and 65% color saturations when tilting at 35o and 70o viewing angle for a simulated indoor ambience (490 cd/m2), and improving 73% and 5% more color saturation when tilting at 35o and 70o viewing angle for a simulated indoor ambience (1375 cd/m2), respectively..

Keywords

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

Submitted at: Nov. 23, 2011
Accepted at: Jan. 22, 2014

Citation

WEN JENG LAN, HO SHING WU, Study for visual color improvement for an organic light emitting diode using a dye-circular-polarizer, Journal of Optoelectronics and Advanced Materials Vol. 16, Iss. 1-2, pp. 130-137 (2014)