Electroluminescent display device
AssigneeLG Display Co., Ltd.
InventorsWonJin Choi, GeeSung Chae, JiGon Kim
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Abstract
Disclosed herein is an electroluminescent display device. The electroluminescent display device includes: a substrate; a plurality of anodes disposed on the substrate; a bank disposed over the substrate and the plurality of anodes, the bank comprising a plurality of openings each exposing a part of the respective anodes, and one or more holes formed between the openings; a plurality of emission layers on each of the anodes; and a plurality of cathodes on each of the emission layers. It is possible to suppress the color mixing occurring when light emitted from a electroluminescent element is reflected to another emission area for representing a different color rather than its emission area.
Claims20
An electroluminescent display device comprising:
- a substrate;
- a planarization layer disposed on the substrate;
- a plurality of anodes disposed on the planarization layer;
- a bank disposed over the planarization layer and the plurality of anodes, wherein the bank has a plurality of openings each exposing a part of each anode, and one or more holes formed between the plurality of openings and exposing a part of the planarization layer;
- an emission layer on each of the plurality of anodes;
- and
- a cathode disposed on the emission layer and the bank,
- wherein the cathode, which is disposed along the shape of the one or more holes and the bank, come in contact with the part of the planarization layer in the one or more holes.
An electroluminescent display device comprising:
- a plurality of emission areas defined over a substrate;
- a planarization layer disposed on the substrate;
- a plurality of electroluminescent elements each disposed on the planarization layer corresponding to each of the plurality of emission areas, each of the electroluminescent elements including an anode, an emission layer on the anode, and a cathode on the emission layer;
- a bank disposed to cover the planarization layer and a part of the anode, defining the plurality of emission areas and having a plurality of first patterns;
- an encapsulation layer covering the plurality of electroluminescent elements and including an inorganic layer and an organic layer alternatively stacked, the encapsulation layer having a plurality of second patterns on an upper surface thereof;
- and
- a cover glass disposed on the encapsulation layer,
- wherein the plurality of first patterns has one or more holes to suppress color mixing between the plurality of emission areas and exposing a part of the planarization layer, and
- wherein the cathode, which is disposed along the shape of the plurality of first patterns and the bank, come in contact with the part of the planarization layer in the one or more holes.
An electroluminescent display device, comprising:
- a plurality of emission areas defined on a substrate and each emitting single color light;
- a planarization layer disclosed on the substrate;
- an electroluminescent element corresponding to each of the plurality of emission areas;
- a color mixing inhibiting trench surrounding the electroluminescent element preventing the emitted single color light from being mixed with other single color light emitted from adjacent emission areas;
- and
- a total reflection prevention layer disposed over the color mixing inhibiting trench and exposing a part of the planarization layer, wherein the total reflection prevention layer making light incident on the total reflection prevention layer exit at an angle greater than an incidence angle,
- wherein the electroluminescent element has a cathode disposed on the color mixing inhibiting trench,
- wherein the cathode is disposed along the shape of the color mixing inhibiting trench,
- wherein the electroluminescent element and the color mixing inhibiting trench are disposed on the planarization layer, and
- wherein the cathode come in contact with the part of the planarization layer in the total reflection prevention layer.
Dependencies are inferred from the claim text.