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.
Claims20
An electroluminescence display device comprising:
- a thin film transistor;
- a planarization layer on the thin film transistor;
- a first bank layer on a surface of the planarization layer facing in a first direction, the thin film transistor disposed between the planarization layer and the first bank layer, the first bank layer having a higher refractive index than the planarization layer;
- a second bank layer on a surface of the first bank layer facing in the first direction, the second bank layer having a higher refractive index than the first bank layer;
- and
- a light emitting layer between a first electrode on the planarization layer and a second electrode on the second bank layer.
An electroluminescence display device comprising:
- 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 between the first electrode and the second electrode, the bank layer including a first bank layer and a second bank layer, the second bank layer including a black pigment, the first bank layer closer to the first electrode than the second bank layer, the first bank layer having a lower permittivity than the second bank layer.
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.
Dependencies are inferred from the claim text.