Patent ID: 7161292

Claim:
An electroluminescent light emission device suitable for use as a white light source, comprising: a transparent substrate formed as a diffusing screen; at least one first transparent electrode layer applied to the substrate; a plurality of electroluminescent light emitter layers arranged laterally next to one another on the at least first transparent electrode layer and from whose emission radiation white light can be generated by additive color mixing; at least one second electrode layer applied to the plurality of light emitter layers; the lateral extent and/or a lateral distance of the light emitter layers amounting to at least 100 μm; and the diffusing screen being an opal glass screen or a plastic substrate with embedded scattering centers and its thickness being a multiple of the average scattering length of the radiation beams to be mixed of the light emitter layers and being at least as large as the distance between the light emitter layers, whereby the radiation beams emitted by the light emitter layers are at least partly superposed on a light exit surface of the substrate.