Key New Patents Allowed in Printable OLED Display Technology
CAMBRIDGE, England, March 14 /PRNewswire-FirstCall/ -- Cambridge Display Technology (CDT) (Nasdaq: OLED - News) has had a number of key, new patents allowed in the United States, Europe and Canada, further expanding its extensive portfolio of intellectual property (IP) in the field of organic light emitting diodes (OLEDs) used for display and lighting applications.
Among the patents now allowed in the US is a patent relating to OLEDs which comprise hole transport, electron transport and emissive components, using type II interfaces, contained in the same molecule. This is believed to be of considerable importance in the context of the printing of OLED devices. Molecules containing 'type II' interfaces are believed to be important in achieving high efficiency display devices.
Other new US patents allowed include a patent relating to the use of a dielectric barrier layer over the key emissive layer to protect it from damage due to sputtering of a conductive layer. This is expected to have important application in top emitting devices in which the light does not have to pass between the transistors but, more efficiently, through a transparent cathode structure.
Another allowed patent is jointly owned with Seiko Epson Corporation and covers certain solvents used in ink formulations for ink jet printing of polymer OLEDs.
These patents are the result of work carried out over the last few years by CDT into all areas of P-OLEDs, including materials development, device optimisation and manufacturing process development.
The ability of manufacturers to print displays is seen as key to the ability to produce lower cost, ever-larger display sizes e.g. for OLED televisions. The use of ink jet printing is seen by many companies as the best current approach to the challenges of manufacture of OLED displays.
As at February 2005, CDT had over 160 published or unpublished families of patents and patent applications. It has exclusive control of further patents held by the Universities of Oxford, Cambridge and St. Andrews. It holds sub- licensing rights to the extensive portfolio of patents relating to P-OLED devices belonging to the Seiko Epson Corporation.
About CDT
Cambridge Display Technology is a pioneer in the development of light emitting polymers (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 organic light emitting diodes, or 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. Founded in 1992, the company is headquartered in Cambridge, UK and listed on the US Nasdaq stock exchange under the symbol 'OLED'.
More information can be found at: cdtltd.co.uk |
