MANHASSET, NY ó DuPont claims to have achieved record performance in printed
organic light emitting diode (OLED) displays.
The company said the results are sufficient for future OLED televisions.
DuPont has applied its advances in materials science to a scalable
manufacturing process where an OLED television operating eight hours per day
would last over 15 years, according to the company. (This feat assumes typical
30 percent duty cycle, running video).
"The current high-cost of manufacturing with evaporated materials has limited
market adoption, and constrained OLED manufacturing for larger size
displays,"said David B. Miller, president, DuPont Electronics &
Communications, in a statement.
"Now, with DuPont printed OLED materials and process technology, fabrication
costs can be significantly reduced, and manufacturing can be scaled to
accommodate TV-size displays."
Printed devices using the DuPont process have reliably achieved lifetimes to
50 percent of initial luminance of 29,000 hours for red, 110,000 hours for green
and 34,000 hours for blue at typical television brightness levels.
These results have been obtained under the following constraints:
Lifetime is T50 adjusted display lifetime (based on accelerated lifetime
testing), at 100 percent duty cycle, at the individual sub-pixel luminances
required for 200 nits front-of-screen brightness, at 40 percent aperture ratio,
46 percent transmission circular polarizer, white color (0.31, 0.33)
The data are reported at 20 degrees C.
The printed red device has a demonstrated current efficiency of 15 cd/A with
color coordinates of (0.65, 0.35); green devices a current efficiency of 22 cd/A
and color coordinates of (0.26, 0.64); and blue devices a current efficiency of
6 cd/A and color coordinates of (0.14, 0.14).