| 摘要 |
PROBLEM TO BE SOLVED: To prevent drop in brightness even if the height of irregularities is sufficiently made high and surly prevent the occurrence of an interference fringe by forming a transparent layer of irregularities comprising resin and flake transparent fillers in the front of a light transmitting substrate. SOLUTION: An EL layer is formed in the back of a light transmitting substrate such as a transparent film 1a, and a transparent layer of irregularities prepared by dispersing flake transparent fillers 7 in resin is formed in the front so as to have sufficient height of the irregularities. The flake fillers prevent the occurrence of an interference fringe without drop in brightness. Preferably, the recessed and projecting height of the transparent layer is made 10μm or more, the ratio of the flake transparent fillers to the resin in the transparent layer is made 10-50 wt.%, and the thickness of the layer is made 13-40μm, and the transparent layer is formed in the form of a pattern on the light transmitting substrate to constitute an electroluminescence lamp. Since the transparent layer has an effect on enhancement of brightness in the surface direction by the stacking shape of the transparent fillers, the thickness of the transparent layer can be made thick.
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