Improving the image of an organic light‐emitting diode using a dye‐polariser

The present work investigated the image improvement of an organic light‐emitting diode (OLED) by using a dye‐polariser on the panel of an OLED. There are many key vision indexes that can be used to indicate the image performances of flat panel displays (FPDs), such as pixel solution, brightness, view angle, visual reflective sensitivity, contrast ratio, colour saturation and response time. In this study, a dye‐polariser was applied on the panel of an OLED and experiments were conducted to examine the image performances using some relative key vision indexes. The results clearly show the effectiveness of the dye‐polariser used. The OLED showed a reduction in visual reflective sensitivity by 86.6%, improved the contrast ratio of the image to 2.4 and 2.7 times in an indoor (or office) ambience (490 cd/m²) and an outdoor ambience (1375 cd/m²), respectively, increased colour saturation from 59.4% to 66.7%, and reinforced the weaknesses of the red and blue organic fluorescent materials. © 2011 Canadian Society for Chemical Engineering