CAMBRIDGE, United Kingdom, Nov. 15, 2006 (PRIMEZONE) -- Just two months after announcing a significant improvement in blue polymer lifetimes, Cambridge Display Technology (CDT) (Nasdaq:OLED) and Sumation(r) announced another lifetime milestone for blue light emitting polymers.
Data from devices produced using these latest, solution processable, fluorescent materials show lifetime(1) of 25,000 hours from an initial luminance of 400cd/m-squared, equivalent to 400,000 hours from 100cd/m-squared.
This represents a 25% improvement over the lifetime results announced in September.
Production of video capable OLED displays requires a full color range of red, green and blue with long lifetime and good efficiency. The efficiency of this fluorescent blue material is approximately 9cd/A, and the color coordinates are: (CIEx=0.14, y=0.21).
"We are pleased to announce yet another substantial achievement in the development of our blue polymers," commented Dr. David Fyfe, Chairman and CEO of CDT. "These achievements further enhance the business value proposition for the use of P-OLEDs in display applications and reemphasize the positive benefits being derived from our Sumation joint venture with Sumitomo Chemical. We are very pleased with the pace of improvement in material lifetimes as we increasingly comprehend the fundamental mechanisms."
(1) Note to editors: When "lifetime" is discussed here, it refers
to the time taken for the display/pixel to fall to half its
initial stated luminance. Lifetime estimates are based on
accelerated testing of simple test devices at several very
high initial luminance levels, and use of these data to
calculate predicted lifetimes at lower brightness levels.
Translation of this single pixel data into performance in an
RGB display system depends on a number of factors and requires
a complex calculation and knowledge of the precise system
design parameters such as aperture ratio, brightness, ink
formulation and relative pixel areas.
About CDT
Cambridge Display Technology is a pioneer in the development of polymer organic light emitting diodes (P-OLEDs) and their use in a wide range of electronic display products used for information management, communications and entertainment.
P-OLEDs are part of the family of OLEDs, which are thin, lightweight and power efficient devices that emit light when an electric current flows. P-OLEDs offer an enhanced visual experience and superior performance characteristics compared with other flat panel display technologies such as liquid crystal displays, and have the key advantage that they can be applied in solution using printing processes. Founded in 1992, the company is headquartered in Cambridge, UK, and listed on the U.S. NASDAQ Global Market under the symbol "OLED." In 2005, CDT and Sumitomo Chemical established a joint venture called Sumation(r) which develops, manufactures and sells P-OLED materials to the display industry.
More information on CDT can be found at: www.cdtltd.co.uk