ORGANIC LIGHT-EMITTING DISPLAY DEVICE

An organic light-emitting display device with improved light efficiency includes a plurality of pixel electrodes (110R, 110G, 110B) each corresponding one of at least a first (100R), second (100G), or third (100B) pixel; a pixel-defining layer (200) covering an edge and exposing a central portion of the pixel electrodes (110R, 110G, 110B); an intermediate layer (120R, 120G, 120B) over the pixel electrode (110R, 110G, 110B) and including an emission layer; an opposite electrode (130) over the intermediate layer (120R, 120G, 120B); and a lens layer (400) over the opposite electrode (300) and including a plurality of condensing lenses (410) each having a circular lower surface. An area of the portion of the pixel electrode (110R, 110G, 110B) exposed by the pixel-defining layer (200) is A, and an area of the lower surface of the condensing lens (410) is B For the first pixel (100R), a ratio B/A ranges from about 1.34 to about 2.63. For the second pixel (100G), B/A ranges from about 1.43 to about 3.00, For the third pixel (100B), B/A ranges from about 1.30 to about 2.43..