Patent ID: 8026872

Claim:
An electroluminescent display, comprising: an electroluminescent panel having a plurality of sub-pixels and at least one illumination surface, wherein the plurality of sub-pixels comprise a plurality of red sub-pixels, green sub-pixels and blue sub-pixels, and the sub-pixels having the same color are arranged in the same direction; and at least one brightness enhanced film having a plurality of micro lenses, disposed on the at least one illumination surface, wherein each of the plurality of micro lenses has a width smaller than half of the minimum width of each of the plurality of sub-pixels, the micro lens has a major axis direction and a minor axis direction substantially intersected to the major axis direction, a projection shape of each of the plurality of micro lenses projected on the illumination surface has two straight sides opposite to each other, a cross-sectional shape of each of the plurality of the micro lens along the minor axis direction is a semicircular shape, and the major axis direction is substantially parallel to the arranged direction of the sub-pixels having the same color, wherein a distance exists between two adjacent micro lenses.