US 2019/0165320 A1 · ELECTROLUMINESCENT DISPLAY DEVICE

Abstract

An electroluminescent display device includes a thin film transistor disposed on a substrate; a passivation layer disposed on the thin film transistor; a plurality of metallic patterns disposed to be spaced apart from each other on the passivation layer; a reflective electrode disposed conforming to the shapes of the plurality of metallic patterns and a top surface of the passivation layer and including a plurality of protruding portions; an overcoat layer disposed on the passivation layer and the reflective electrode and including an opening configured to expose a top surface of each of the plurality of protruding portions; a first electrode disposed on the reflective electrode and the overcoat layer and electrically connected to the reflective electrode; an light-emitting layer disposed on the first electrode; and a second electrode disposed on the light-emitting layer.

Claims23

Dependent claims

An electroluminescent display device, comprising:

a thin film transistor disposed on a substrate;
a passivation layer disposed on the thin film transistor;
a plurality of metallic patterns disposed spaced apart from each other on the passivation layer;
a reflective electrode disposed conforming to the shape of the plurality of metallic patterns and also to a top surface of the passivation layer and including a plurality of protruding portions;
an overcoat layer disposed on the passivation layer and the reflective electrode and including an opening that exposes a top surface of each of the plurality of protruding portions;
a first electrode disposed on the reflective electrode and the overcoat layer and electrically connected to the reflective electrode;
an light-emitting layer disposed on the first electrode;
and
a second electrode disposed on the light-emitting layer.

6 more elements

An electroluminescent display device, comprising:

a substrate including one or more pixels;
and
a light-emitting structure disposed in each of the pixels, wherein the light-emitting structure comprises a second electrode, a reflective electrode, and a light-emitting layer disposed between the second electrode and the reflective electrode, or comprises a second electrode, a reflective electrode, a light-emitting layer disposed between the second electrode and the reflective electrode, and a first electrode disposed between the light-emitting layer and the reflective electrode,
wherein each of the pixels comprises a plurality of micro cavity areas disposed to be spaced apart from each other and one or more non-micro cavity area disposed between the micro cavity area, a combined thickness in a vertical direction of the light-emitting structure from the reflective electrode to the second electrode has a different value in the micro cavity area from that in the non-micro cavity area, and the light-emitting structure is configured to produce a micro cavity effect, and
wherein each of the second electrode and the reflective electrode is formed to be flat in the micro cavity area and at least one of the second electrode and the reflective electrode is formed to comprise a non-flat surface in the non-micro cavity area or wherein each of the first electrode, the second electrode, and the reflective electrode is formed to be flat in the micro cavity area and at least one of the first electrode, the second electrode, and the reflective electrode is formed to comprise a non-flat surface in the non-micro cavity area.

2 more elements

Dependencies are inferred from the claim text.

Electroluminescent display device

Life of this patent

Electroluminescent display device

Life of this patent

Abstract

Claims23