Organic light emitting device and display device having the same

An organic light-emitting display device has improved transmittance and UV light reliability by optimizing the thickness and material of a cathode. An organic light-emitting display device comprises an organic light-emitting element on a substrate, the organic light-emitting element including an anode, an organic light emitting layer, and a cathode, an organic layer between the substrate and the organic light-emitting element, and an auxiliary layer adjacent to the cathode and including a material having electron injection ability, such that the influence of UV lights on the OLED device is reduced, thereby improving the efficiency and lifespan of the organic light-emitting element. 种有机发光显示装置，其通过优化阴极的厚度和材料而具有提高的透射率和UV光可靠性。种有机发光显示装置，包括：位于基板上的有机发光元件，所述有机发光元件包括阳极、有机发光层和阴极；位于所述基板与所述有机发光元件之间的有机层；和与所述阴极相邻的辅助层，所述辅助层包括具有电子注入能力的材料，以减小UV光对OLED装置的影响，由此提高有机发光元件的效率和寿命。