The electroluminescent device successively comprises a cathode, an electroluminescent layer, a transparent electrode layer, an evanescent light-scattering layer comprising a matrix composed of a low-refractive material containing light-scattering particles, and a transparent sheet/plate. Such an electroluminescent...http://www.google.co.uk/patents/US20060049745?utm_source=gb-gplus-sharePatent US20060049745 - Electroluminescent device
