Luminous display element
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Abstract
In a luminous display element, a retro-reflector is provided on the back side of an organic EL layer which includes an emission layer whose state changes between an emission state and a non-emission state. The retro-reflector includes a corner cube array, and reflects incident light in the same direction as an incident direction. A unit structure of the corner cube array is a form of a triangular pyramid which is made up of rectangular equilateral triangles having three faces, and a light shielding process is performed on the periphery of a base angle of the rectangular equilateral triangle. Thus, it is possible to prevent an image from being reflected, so that it is possible to provide the luminous display element whose contrast ratio and the utilization efficiency of emission are high.
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Citations
24 Claims
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1-18. -18. (Canceled)
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19. A luminous display element comprising:
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a retro-reflector;
an emission layer;
a metal electrode for applying a voltage to the emission layer; and
a transparent electrode for applying a voltage to the emission layer, wherein the retro-reflector, the metal electrode, the emission layer and the transparent electrode are provided in this order. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification