Patent ID: 8410686

Claim:
A display device comprising: (A) a plurality of light-emitting devices comprising a first electrode, a second electrode, and an organic layer including a light-emitting layer therebetween and configured to resonate light generated in said light-emitting layer between a first interface defined by an interface between said first electrode and said organic layer and a second interface defined by an interface between said second electrode and said organic layer; and (B) a transparent upper substrate having a first side facing said second electrode and a second side located on an opposite side of said first side, and fixed above said second electrode, wherein: said display device satisfies the below-described equations (1-1), (1-2), (1-3) and (1-4), lens portions are provided on said first side of said transparent upper substrate such that a portion of said light generated in said light-emitting layer is allowed to pass through said lens portions, and the number of lens portions provided for each light-emitting device is set as the integer part of a coefficient α, where α is an aspect ratio of a planar shape of a light-emitting region of the light-emitting device, 0.7{−Φ 1 /(2Π)+ m 1 }≦2× OL 1 /λ≦1.2{−Φ 1 /(2Π)+ m 1 } equation (1-1) 0.7{−Φ 2 /(2Π)+ m 2 }≦2× OL 2 /λ≦1.2{−Φ 2 /(2Π)+ m 2 } equation (1-2) L 1 <L 2 equation (1-3) m 1 <m 2 equation (1-4) where, L 1 is a distance from a maximum light-emitting position of said light-emitting layer to said first interface, OL 1 is an optical distance from said maximum light-emitting position of said light-emitting layer to said first interface, L 2 is a distance from said maximum light-emitting position of said light-emitting layer to said second interface, OL 2 is an optical distance from said maximum light-emitting position of said light-emitting layer to said second interface, m 1 , m 2 are integers, λ is a wavelength of a maximum peak in a spectrum of light generated in said light-emitting layer, Φ 1 is a phase shift of reflected light occurred at said first interface (unit: radian), with a proviso of −2Π<Φ 1 ≦0, and Φ 2 is a phase shift of reflected light occurred at said second interface (unit: radian), with a proviso of −2Π<Φ 2 ≦0, wherein said plurality of light-emitting devices are arrayed in stripes, and more than one of said lens portions are arranged per each light-emitting device.