Patent ID: 7732809

Claim:
Light emitting displays provided with a plurality of light-emitting devices arranged in a matrix each constituting a pixel, each light-emitting device having a light-emitting thin-film layer and a light reflective surface or a reflective electrode working also as a light reflective surface in this order on the back side, and a circularly polarized light reflective layer which separates incident light into two types of circularly polarized components, one being reflected and the other transmitted by the reflective layer, a quarter-wave plate and a polarizer in this order on the front side, wherein each of the displays has at least a blue pixel, a red pixel and a green pixel; the light-emitting thin-film layer keeps a state of polarization of light transmitted thereby essentially unchanged, the light reflective surface reflects most of at least circularly polarized light entering at a right angle to the surface after reversing its rotational direction while keeping it circularly polarized, the circularly polarized light reflective layer has a wavelength range which selectively reflects a blue wavelength light, the circularly polarized light reflective layer has only a single principal reflection wavelength range which includes a part of the wavelength range of light radiated from at least one of a plurality of the light-emitting devices each constituting a pixel and also has a wavelength width of 130 nm or less, and an optical compensation layer is provided between the polarizer and the light-emitting device to serve as an optical indicatrix having little refractive index distribution in the in-plane direction and having a refractive index in the thickness direction different from that in the in-plane direction, wherein the relationships n x =n y and n cx =n cy are substantially satisfied, and the following relationship is also satisfied: |1.2·( n x −n z )· d |≧|( n cx −n cz )· d c |≧|( n x −n z )· d|, wherein, d: thickness, n z : refractive index in the thickness direction, n x and n y : principal refractive index in the in-plane direction perpendicular to the thickness direction, all of the circularly polarized light reflective layer; d c : thickness, n cz : refractive index in the thickness direction, n cx and n cy : principal refractive index in the in-plane direction perpendicular to the thickness direction, all of the optical compensation layer and wherein the single wavelength range of the principal reflection of the circularly polarized light reflective layer is only in a wavelength range corresponding to blue having a wavelength of 510 nm or less for each of the blue pixel, the red pixel and the green pixel.