The invention provides a display unit which can improve emission efficiency of
lights for image display, and assure luminance of display images. The display unit
comprises micro prisms which are arranged in the positions corresponding to organic
EL devices, and which have a high refraction index to refract a light, and auxiliary
prisms with a low refraction index which are embedded in voids between each micro
prism. A light volume of the light viewed as an image in the direction facing an
organic EL display (facing direction) is a total of a light volume of a light essentially
emitted from the organic EL device in the facing direction, and lights which are
directed in the facing direction by utilizing refraction phenomenon based on differences
of refraction index between the micro prism and the auxiliary prism. Compared to
the case wherein the micro prisms and the auxiliary prisms are not provided, an
emission volume of the light in the facing direction is increased by the light
volumes of the lights.