Patent ID: 8729533

Claim:
An organic electroluminescent display device, comprising: a first substrate including a display region including a plurality of pixel regions; a first electrode in each pixel region; an organic light emitting layer on the first electrode; a second electrode on the organic light emitting layer and in the display region, wherein the second electrode includes a first metal material having a first work function, and a first sheet resistance, and a second metal material having a second work function less than the first work function, and a second sheet resistance greater than the first sheet resistance, wherein the second electrode has an average light transmittance of about 40% or more at a wavelength of about 460 nm, an average light transmittance of about 35% or more at a wavelength of about 530 nm, and an average light transmittance of about 25% or more at a wavelength of about 620 nm.