Organic light-emitting display device

An organic light-emitting display (OLED) device, comprising:

• a red organic light-emitting diode having a first optical distance comprising:
• a first anode electrode;
• a red organic emission layer on the first anode electrode;
• and
• a cathode electrode on the red organic emission layer;
• a green organic light-emitting diode having a second optical distance shorter than the first optical distance comprising:
• a second anode electrode;
• a green organic emission layer on the second anode electrode;
• and
• the cathode electrode on the green organic emission layer;
• and
• a blue organic light-emitting diode having a third optical distance shorter than the second optical distance comprising:
• a third anode electrode;
• a blue organic emission layer on the third anode electrode;
• and
• the cathode electrode on the blue organic emission layer;
• wherein the first optical distance is a distance between a top surface of the first anode electrode and a bottom surface of the cathode electrode, the first optical distance is determined by a half of a value of a photoluminescence (PL) spectrum of the red organic emission layer (R_PLλmax),
• wherein the second optical distance is a distance between a top surface of the second anode electrode and the bottom surface of the cathode electrode, the second optical distance is determined by a half of a value of a PL spectrum of the green organic emission layer (G_PLλmax), and
• wherein the third optical distance is a distance between a top surface of the third anode electrode and the bottom surface of the cathode electrode, the third optical distance is adjusted more than 40 Å from a half of a value of a peak of a PL spectrum of the blue organic emission layer (B_PLλmax),
• wherein a difference (ΔLB) between the peak of the PL spectrum of the blue organic emission layer (B_PLλmax) and a peak of an EL spectrum of the blue organic light-emitting diode (B_ELλmax) is between 4 nm and 8 nm.