Electroluminescence Display Device
AssigneeLG Display Co., Ltd.
InventorsYeongyun YANG, Bonggeum LEE, WonKeun PARK, Sohee YU, Hanyoung CHO
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Abstract
Embodiments disclosed herein relate to an electroluminescence display device including a first electrode, a second electrode facing the first electrode, an emission layer between the first electrode and the second electrode, and a bank layer defining the emission layer. The bank layer may be disposed between the first electrode and the second electrode. The bank layer may include a first bank layer and a second bank layer. The second bank layer may include a black pigment. The first bank layer may be closer to the first electrode than the second bank layer, and the first bank layer may have a lower permittivity than the second bank layer.
Claims11
An electroluminescence display device comprising:
- a thin film transistor on a surface of a substrate facing in a first direction;
- a planarization layer on the surface of the substrate, the planarization layer covering the thin film transistor, the thin film transistor disposed between the planarization layer and the substrate, the planarization layer having a first area having a first thickness along the first direction and a second area having a second thickness along the first direction, the first thickness smaller than the second thickness;
- a first electrode on the first area of the planarization layer, the first electrode electrically connected to the thin film transistor;
- a bank layer on a portion of the second area of the planarization layer, the bank layer including a black pigment;
- an emission structure including a transport layer and a light emitting layer on a surface of the first electrode facing in the first direction;
- and
- a second electrode on a surface of the emission structure facing in the first direction.
A display apparatus, comprising:
- a substrate including an upper surface and a lower surface;
- a thin film transistor on the upper surface of the substrate;
- a planarization layer covering the thin film transistor and the upper surface of the substrate, the planarization layer including a first portion having a first thickness and a second portion having a second thickness, the first thickness smaller than the second thickness;
- a first electrode on the planarization layer, the first electrode being at the first portion of the planarization layer and electrically connected to the thin film transistor;
- a bank layer on the planarization layer, the bank layer being at the second portion of planarization layer and including a black pigment;
- an emission structure on the first electrode, the emission structure including a transport layer and a light emitting layer;
- and
- an second electrode on the emission structure, the emission structure between the first electrode and the second electrode.
Dependencies are inferred from the claim text.