Patent ID: 8866131

Claim:
An organic light-emitting device comprising: a first substrate; a second substrate; a light drawing-out layer disposed between the first substrate and the second substrate; a transparent electrode disposed between the light drawing-out layer and the first substrate; a reflection electrode disposed between the transparent electrode and the first substrate; and a first light-emitting unit disposed between the transparent electrode and the reflection electrode; wherein the light drawing-out layer includes particles and a binder; wherein the particles have larger refractive index than the transparent electrode has; wherein the first light-emitting unit includes a first light-emitting layer for emitting a first light-emitting color; and wherein relations of equation (1) and equation (2) are satisfied: L 1 ≧λ 2 /4 (1) L 1 cos θ 1 =λ 1 (¼ +n/ 2) (2) where L 1 is an optical length from a first light-emitting point in the first light-emitting layer to the reflection electrode, where λ 2 is a wavelength at the longer wavelength side, having an intensity of 1% of the maximum intensity of a light-emitting spectrum of the first light-emitting color, where λ 1 is a wavelength at the shorter wavelength side, having an intensity of 1% of the maximum intensity of the light-emitting spectrum of the first light-emitting color, where n is an integer not less than 0, and where 0<θ 1 ≦60.