By Rob Scott
November 18, 2011
- The promise of super-thin and colorful OLED (Organic Light Emitting Diode) technology for TVs has yet to be realized, even though the industry has been regularly impressed with prototypes and limited editions.
- According to Electronic House, “OLED TVs are poised to make a comeback, or a debut, or a comeback debut.” Researchers predict that AMOLED (Active Matrix OLED) will appear in a number of devices, including TVs.
- LG, for example, is planning a 55-inch OLED TV in 2012, and one of the larger Asian manufacturers has a deal with DuPont to use the company’s “printing-based process that it says will reduce manufacturing costs for large-display AMOLED TVs.”
- “Current manufacturing technology doesn’t scale up to TVs,” says Bill Feehery, global business director for DuPont Electronics & Communications. “Today OLED material is heated up and evaporated, then they use a screen to create the pixels on the display. Our goal was to use an ink-jet printer-like technology to print it.”
- Feehery suggests the hefty premiums of early units will come down in cost once mass manufacturing of AMOLED TVs begins in 2014.
- “AMOLED is already used in mobile phones and can deliver vivid colors, higher contrast, faster response and a wider viewing angle than traditional LCDs, while consuming less power,” reports Electronic House.
By Rob Scott
September 2, 2011
- Engineers at UCLA have created the first fully stretchable organic light-emitting diode (OLED), taking the development of bendable devices to the next level.
- “Stretchable electronics promise video displays that could be rolled up and tucked into a shirt pocket, or cell phones that could swell or shrink,” reports MIT’s Technology Review. “Electronic sheets that could be draped like cloth would be a boon for robotic skin and embedded medical devices.”
- In order to create the stretchable OLED display, UCLA’s team “sandwiched two layers of the carbon nanotube electrode around a plastic that emits light when a current runs through it. The team used an office laminating device to press the final, layered device together tightly, pushing out any air bubbles and ensuring that the circuit would be complete when electricity was applied.” The result is a small polymer that can stretch up to 45 percent on one axis while emitting a colored light.
- The two-centimeter square proof-of-concept unit is a ways off from making it into CE devices, but is a significant breakthrough. “We are still some ways off from having high-performance, really robust, intrinsically stretchable devices,” says Stanford professor of chemical engineering Zhenan Bao who works on stretchable solar cells, but “with this work and those from others, we are getting closer and closer to realizing this kind of sophisticated and multifunctional electronic skin.”