Light-emitting element and display device using same

A display device having a plurality of light-emitting elements that construct picture elements aligned on a substrate in a formation of a matrix, wherein the light-emitting element comprises:

• a light-emitting device having a flat surface portion and including a light-emitting layer, an anode and a cathode;
• a driver element connected with the light-emitting element;
• an insulation layer having a contact hole formed over the driver element;
• wherein the anode is formed on the insulation layer and connected to the driver element via the contact hole;
• and
• a tilted reflective surface is provided in a peripheral area surrounding the flat surface portion of the light-emitting device and has a tilt angle against the flat surface portion of the light-emitting device;
• wherein the tilted reflective surface is provided on a surface of a slope of a bank that is provided on the substrate,
• wherein the bank is formed to cover the contact hole;
• wherein a width of a cross section of the bank becomes smaller as the cross section comes farther away from a surface of the substrate;
• wherein an optical waveguide layer is overlaid in an area surrounded by the tilted reflective surface on the light emitting device;
• and
• wherein the optical waveguide layer is optically isolated from each of the picture elements.