Patent ID: 11864402
Assignee: SHARP KABUSHIKI KAISHA
Field: nan (nan)
Classification: CPC H | IPC H

Claim 9:
10. A top emitting quantum dot light emitting diode (QLED) apparatus for an emissive display apparatus having a plurality of sub-pixels separated by a bank structure, and each sub-pixel of the plurality of sub-pixels having an emissive region, the top emitting QLED apparatus comprising:
a plurality of emissive layers, each disposed in the emissive region between a plurality of first electrodes and a second electrode, wherein:
each of the plurality of first electrodes comprises a reflective metal that is individually separated by the bank structure;
the second electrode comprises a transparent conductive electrode and an auxiliary electrode;
the bank structure comprises a plurality of sloped portions each surrounding a corresponding emissive region;
the auxiliary electrode comprises a reflective conductive metal configured to cover the plurality of sloped portions;
each of the plurality of sloped portions is configured at an angle, such that the auxiliary electrode reflects internally reflected light out of each of the plurality of sub-pixels in a viewing direction;
the auxiliary electrode further comprises a partially light scattering surface configured to broaden a reflective angle range of the auxiliary electrode; and
the transparent conductive electrode comprises nanoparticles measuring between 20 nm and 100 nm on the plurality of sloped portions, thereby imparting an optically rough surface to the auxiliary electrode for scattering light.