The sub-pixel DR and the analysis sub-pixel TR are different in size in plan view but the same in structure. The sub-pixel DG and the analysis sub-pixel TG are also different in size in plan view but the same in structure. Moreover, the sub-pixel DB and the analysis sub-pixel TB are also different in size in plan view but the same in structure.

A base material 12 may be either a glass substrate, or a flexible substrate including a resin film such as polyimide. The flexible substrate may include: two resin films; and an inorganic insulating film sandwiched between the two resin films. A film made of, for example, polyethylene terephthalate may be attached to a lower surface of the base material 12. When the base material 12 is a flexible substrate, the display device 1 can be formed to be flexible.

A barrier layer 3 prevents such foreign objects as water and oxygen from reaching a thin-film transistor (TFT) layer 4 and a light-emitting element layer 5. An example of the barrier layer 3 includes a silicon oxide film, a silicon nitride film, or a silicon oxide nitride film formed by the chemical-vapor deposition (CVD), or a multilayer film including those films.