Jeffrey Glenn Innocenzo

Active matrix OLED using 150ºC a-Si TFT backplane built on flexible plastic substrate

Flexible displays fabricated using plastic substrates have a potential for being very thin, light weight, highly rugged with greatly minimized propensity for breakage, roll-to-roll manufacturing and lower cost. The emerging OLED display media offers the advantage of being a solid state and rugged structure for flexible displays in addition to the many potential advantages of an AM OLED over the currently dominant AM LCD. The current high level of interest in flexible displays is facilitating the development of the required enabling technologies which include development of plastic substrates, low temperature active matrix device and backplane fabrication, and display packaging. In the following we will first discuss our development efforts in the PEN based plastic substrates, active matrix backplane technology, low temperature (150°C) a-Si TFT devices and an AM OLED test chip used for evaluating various candidate designs. We will then describe the design, fabrication and successful evaluation and demonstration of a 64x64 pixel AM OLED test display using a-Si TFT backplane fabricated at 150°C on the flexible plastic substrate.

43.3: Slot Die Coating for OLED Displays

Slot die coating is a cost-effective, scalable process for applying continuous organic layers in OLED displays. Uniform submicron coatings can be obtained on patterned OLED backplanes from low viscosity fluids. Coating and drying defects can be reduced by adjusting fluid properties, e.g., surface tension, viscosity and concentration.

47.2: Plastic Displays - Films for OLED Displays

A plastic display will offer light weight construction, durability, and the potential for flexible product design. Key to achieving these goals is the design of the substrate. This paper will discuss the specifications of a plastic substrate for OLEDs, the development of a substrate that meets the processing requirements, and the results of device testing.

Active-matrix polymer displays made with electroluminescent polymers

Active-matrix organic/polyeric light emitting displays (AMOLEDs/AMPLEDs) are of great potentials for high information content display applications. They offer high brightness, fast response time, high image quality (high contrast, high gray levels and small pixel pitch size) and low power consumption. AMPLEDs are ideal for portable electronic devices such as web-phones, personal data assistants, GPS and handhold computers. AMPLEDs are especially suitable for motion picture applications. Since the image pixels consume power only when they are turned on, and only consume the power necessary for their corresponding brightness, video displays made with AMOLED/AMPLED reduce power consumption and extend display lifetime considerably. Motion picture applications also minimize image retention and optimize display homogeneity. In this presentation, we discuss our recent progress on AMPLEDs and compare their performance with that of AMLCD.