Juhn Suk Yoo

10.1: Invited Paper: Wearable 4‐Inch QVGA Full Color Video Flexible AMOLEDs for Rugged Applications

We present our work on the worlds first wrist worn communication device built upon a flexible low power consumption full color AMOLED using phosphorescent materials. The device offers the wearer the ability to see high information content video rate information in a thin and rugged form factor 4-inch QVGA display, conformed around a human wrist.

Full color flexible displays on thin metal foil with reduced bending radius

We have developed Full color flexible AM-OLED and AM-EPD displays using a thin metal foil, allowing them to recover their original shape after being bent as well as to produce vivid color images. The key development technologies including a-Si TFT fabrication on thin stainless steel foil and integrated driver electronics in the display panel are described along with improved display performance in a curvature of 5cm bending radius.

Recent progress of flexible AMOLED displays

Significant progress has been made in recent years in flexible AMOLED displays and numerous prototypes have been demonstrated. Replacing rigid glass with flexible substrates and thin-film encapsulation makes displays thinner, lighter, and non-breakable - all attractive features for portable applications. Flexible AMOLEDs equipped with phosphorescent OLEDs are considered one of the best candidates for low-power, rugged, full-color video applications. Recently, we have demonstrated a portable communication display device, built upon a full-color 4.3-inch HVGA foil display with a resolution of 134 dpi using an all-phosphorescent OLED frontplane. The prototype is shaped into a thin and rugged housing that will fit over a users wrist, providing situational awareness and enabling the wearer to see real-time video and graphics information.