Patent ID: 8789968

Claim:
A light-emitting panel comprising: a first light-emitting element: and a second light-emitting element, wherein the first light-emitting element and the second light-emitting element each comprises, between a pair of a reflective film and a semi-transmissive and semi-reflective film, a layer containing a light-emitting organic compound interposed between a pair of electrodes and an optical adjustment layer, wherein the layer containing a light-emitting organic compound in each of the first light-emitting element and the second light-emitting element emits light comprising light with a wavelength greater than or equal to 600 nm and less than 800 nm and light with a wavelength greater than or equal to 400 nm and less than 600 nm, wherein the first light-emitting element has an equal optical path length between the pair of the reflective film and the semi-transmissive and semi-reflective film of N/2 (N is a natural number) of a length greater than or equal to 600 nm and less than 800 nm, wherein a layer transmitting red light is provided over the semi-transmissive and semi-reflective film in the first light-emitting element, and wherein an optical path length between the pair of the reflective film and the semi-transmissive and semi-reflective film in the second light-emitting element is N/2 (N is a natural number) of a length greater than or equal to 400 nm and less than 600 nm.