Self-Aligned Organic Light-Emitting Diodes with Color Changing by Ink-Jet Printing Dots

The self-aligned color-changeing organic light-emitting diodes with the ink-jet printing (IJP) dots have been investigated, and we have studied a device structure of a micro-area color-changeing method involving the IJP emission of dots and their periphery, where a side-coupling emission mode and double-area emission mode were used. The distance of the side-coupling emission from emission dot was estimated to be 10 µm. The brightnesses of the dots and their periphery at 100 mA/cm2 were 1,300 and 380 cd/m2, respectively.