The needs of the many A decade ago, OLED was the hot technology of the future: the one to displace the backlit LCD panels that continue to dominate the market for flat-panel displays OLED had the allure of a much better contrast ratio as black really could be guaranteed to be black. The organic molecules that act as the light emitters can be printed onto flexible substrates, implying a lower cost of production once optimised and pointing to displays that the user could roll up to transport. Although flexible displays have come to market as promised, OLEDs face some continuing issues such as production yield and lifetime. Consumers have complained about burn-in problems on large TVs and relatively low yields have kept prices high. While they try to improve OLED yields higher-end manufacturers are keen to find an alternative to conventional LCD panels.