Pixel for an organic light-emitting diode microscreen

US11031438B2 · kind B2 · utility

Assignee

• COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR

Inventors

• Laurent Mollard · Grenoble, FR
• Tony Maindron · Grenoble, FR
• Myriam TOURNAIRE · Grenoble, FR

Key dates

• Filing date: Aug 20, 2019
• Grant date: Jun 8, 2021
• Expiry date: Aug 20, 2039

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K2102/3026

Abstract

A pixel includes, successively a substrate; a reflector that is reflective in the visible spectrum; a spacing layer; a first, transparent electrode; a stack of organic light-emitting layers that is configured to emit a white light; a second, semitransparent electrode that is formed on the stack, the second electrode and the reflector forming an optical resonator; the spacing layer having first, second and third portions, the thicknesses of which are adjusted such that the optical resonator allows, respectively, the transmission of red, green and blue light; noteworthy in that the first and second portions of the spacing layer each include lateral edges that are covered with a material that is reflective in the visible spectrum.