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"The OLED displays industry is under severe pressure to reduce manufacturing costs in order to compete with LCDs," said William Feehery, global business director, DuPont OLEDs. "We are very excited that our new set of solution-based OLED materials, and the improved uniformity and reliability we've been able to achieve with our printing process, have the ability to overcome the cost barriers the industry has been facing. We believe that larger OLED displays can be manufactured at a cost of up to 30 percent less than today's LCDs."
Using this advanced solution-based materials set, DuPont Displays has also exceeded the reported performance of other solution-based OLED materials. It has measured accelerated lifetimes of the three primary colors that could translate in a display to 20,000 hours of white lifetime (which is extended by as much as 5 times when showing video) at a normal viewing brightness (200 candelas per square meter (cd/m2)). At 1,000 cd/m2, the standard test luminance used in the industry, the DuPont materials have lifetimes (T50–the the time at which 50 percent of brightness is reached) of 14,000 hours for blue with International Commission of Illumination (CIE) 1931 color coordinates of (0.14, 0.16), 230,000 hours for green with color coordinates of (0.29, 0.65), and 46,000 hours for red with color coordinates of (0.66, 0.34).
In a review of widely available reports, these are the longest measured lifetimes for a solution material set with equivalent color coordinates.
Over the last 12 months, DuPont Displays also has made progress with the innovative solution-printing process announced last year. Using this proprietary process and specialized equipment, DuPont OLED materials were printed onto active-matrix thin-film transistor (TFT) backplanes supplied by leading TFT providers, and then protected from environmental degradation with DuPont™ Drylox™ encapsulation technology. DuPont exhibited two different display formats at SID 2007. The 4.3 and 6.1-inch full-color active-matrix displays have print resolution of 128 and 80 ppi respectively, and were fabricated at the DuPont Displays pilot facility in Santa Barbara, California.