Patent ID: 11943985
Assignee: LG DISPLAY CO., LTD.
Field: nan (nan)
Classification: CPC H | IPC H

Claim 9:
10. A light-emitting display device comprising:
a substrate having a first subpixel, a second subpixel and a third subpixel;
an anode at each of the first to third subpixels;
a cathode over the first to third subpixels;
a charge generation layer between the anode and the cathode;
a first emissive layer between the anode and the charge generation layer in the first subpixel, the first emissive layer having a first host and a first fluorescent dopant;
a first sub emissive layer between the charge generation layer and the cathode in the first subpixel, the first sub emissive layer having a second host and a second fluorescent dopant; and
a second sub emissive layer abutting the first sub emissive layer, the second sub emissive layer having a third host and a non-fluorescent dopant,
wherein the first sub emissive layer and the second sub emissive layer overlap the first emissive layer,
wherein each of the first fluorescent dopant, the second fluorescent dopant, and the non-fluorescent dopant has an emission peak at a wavelength of approximately 435 nm to 490 nm, and
wherein the second host has a photoluminescence (PL) spectrum that overlaps a PL spectrum of the second fluorescent dopant, and the second host has a higher triplet state than that of the non-fluorescent dopant.