Patent ID: 8227976

Claim:
A display apparatus comprising: an organic electroluminescent element that emits blue light; an organic electroluminescent element that emits green light; and an organic electroluminescent element that emits red light, wherein each organic electroluminescent element has a first electrode, a light-emitting layer, and a second electrode, wherein light emitted from each organic electroluminescent element is output from the second electrode, wherein a first optical adjustment layer having a thickness d 1 is provided on the second electrode of the organic electroluminescent element that emits red light, and wherein the thickness d 1 of the first optical adjustment layer satisfies the following mathematical expression A: (4 m 1 −2φ 1 /π−3)λ 1 /(8 n 1 )< d 1 <(4 m 1 −2φ 1 /π−1)λ 1 /(8 n 1 ) (A) where: λ 1 denotes a maximum peak wavelength of a spectrum of light emitted from the organic electroluminescent element that emits red light, n 1 denotes a refractive index of the first optical adjustment layer at the maximum peak wavelength λ 1 , φ 1 denotes a phase shift of the light output from the organic electroluminescent element that emits red light when the light is reflected at an interface of the first optical adjustment layer that is opposite to the second electrode, and m 1 denotes a positive integer.