Cambridge Display Technology (CDT) Limited, based in Cambridge, England, is known for its proprietary polymer light-emitting diode (PLED) technology, which supports the creation of flexible displays and optimized lighting products. The company holds multiple patents on its materials, devices, and processes. PLED technology originally was developed in 1989 at Cambridge University's Cavendish Laboratory. The university launched the firm in 1992. CDT established an ink jet printing joint venture with Seiko-Epson in 1998. The following year, Kelso Investment Associates and Hillman Capital acquired majority interests in CDT. Working with Seiko-Epson, the firm introduced a full-color, active matrix ink jet printed PLED display in 2000. The company acquired Gretag Imaging's Litrex Corporation unit in 2001. The following year, CDT opened its technology development center in Godmanchester, U.K. Also in 2002, the firm and Seiko Epson Corporation launched the Polyink joint venture. In the same year, CDT acquired Opsys Limited. The firm has formed strategic partnerships with Bayer AG, Dow Chemical, Sumitomo Chemical, ST Microelectronics, Tokki Corporation, and other companies worldwide. It licenses its technology to a variety of original equipment manufacturers. The firm provides customers with materials development, device optimization, process development, training, and other services. CDT PLEDs have been integrated into audio mixer, MP3 player, miniature digital camera, watch, computer, television, mobile telephone, automobile instrument panel, and other products. CDT maintains additional offices in Asia and the United States. The firm has won recognition from 'Scientific American,' Deloitte & Touche, the Royal Academy of Engineering, 'Wall Street Journal,' and 'Time Magazine.' The company went public in 2004. It is listed on NASDAQ under the OLED symbol. 14