CAMBRIDGE, England, Aug. 27, 2007 (PRIME NEWSWIRE) -- Cambridge Display Technology (CDT) (Nasdaq:OLED) and Sumation® are pleased to announce substantially improved lifetime data for green and red P-OLED materials.

Data from spin coated devices using a common cathode and interlayer material demonstrate lifetimes(1) for recently developed solution-processable green and red P-OLED materials of 78,000 hours and 67,000 hours, respectively, from an initial luminance of 1000 candelas per square meter, or cd/m2. This is equivalent(2) to approximately 445,000 hours and 420,000 hours from an operating brightness of 400cd/m2 for these materials. These latest lifetimes represent a 60% and 280% increase in performance for green and red materials over results that were announced in May and March of this year, respectively.

Chief Executive Officer of CDT, Dr. David Fyfe commented, "Once again, we are reporting tremendous progress on materials developed at Sumation and tested at CDT's facilities. Rapid material development continues unabated and is a testament to the excellent collaboration between Sumation's research centers in the U.K. and Japan."

President and Chief Executive Officer of Sumation, Susumu Miyazaki added, "We continue to make rapid progress on all colors and these results are the latest in a series of accomplishments that we anticipate will continue for the foreseeable future."

Notes to editors:

1) 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 a full color 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.

2) Acceleration factors to convert lifetime from one brightness to another have been determined for green and red materials using various initial luminances between 6000 cd/m2 and 800 cd/m2 and found to be equal to 1.9 for green and 2 for red. These acceleration factors were used to predict lifetimes at 400 cd/m2. It should be noted that due to the long lifetimes at 400 cd/m2, lifetime predictions at this brightness are susceptible to greater errors than the lifetimes quoted at 1,000 cd/m2.

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, U.K. 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

About Sumation 
Sumation is a 50:50 joint venture between Cambridge Display Technology Ltd. and Sumitomo Chemical Co. Ltd. Sumation was formed in November of 2005 and is headquartered in Tokyo, Japan. Sumation develops, manufactures and sells P-OLED materials to the display and lighting industry. More information on Sumation can be found at: www.sumation.co.uk