ORGANIC LIGHT EMITTING DISPLAY DEVICE

Provided is an organic light emitting display device (1000) that includes: an organic light emitting element (100) including a cathode (103), an anode (101), and an organic light emitting layer (102), an optical multilayer film (120) on the organic light emitting element (100), wherein the optical multilayer film (120) including a first optical layer (121), a second optical layer (122), and a third optical layer (123) in order on the cathode (103), wherein a refractive index of the first optical layer (121) is larger than that of the cathode (103), and a refractive index of the second optical layer (122) is smaller than those of the first optical layer (121) and the third optical layer (123); and a capping layer (110) between the organic light emitting element (100) and the optical multilayer film (120), wherein a bottom surface of the capping layer (110) is in direct contact with an upper surface of the cathode (103), wherein the organic light emitting element (100) is configured to cause a strong microcavity effect between the anode (101) and the cathode (103); wherein the optical multilayer film (120) is configured to cause a weak microcavity effect between the first optical layer (121) and the cathode (103).