IP Library Granted Patent US 11,075,253
Granted Patent B2
US 11,075,253 · App. 16/196,903 · Granted Jul 27, 2021

Organic light-emitting display device

Inventors: In-Yeong Kong (Seoul, KR); Jong-Sin Park (Seoul, KR); Dong-Yoon Lee (Seoul, KR)
Assignee: LG DISPLAY CO., LTD.
H01L27/3246G09G3/3225H01L27/322H01L27/3272H01L51/5206H01L27/3211
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 11,075,253
App. No.
16/196,903
Granted
Jul 27, 2021
Kind
B2
Abstract

The present disclosure relates to an organic light-emitting display device capable of preventing threshold voltage variation in a thin film transistor. In the organic light-emitting display device according to the present disclosure, an upper light-shielding layer overlying a pixel driving circuit which drives a light-emitting element is disposed on the same plane as an anode electrode and a bank is disposed to cover the sides of the upper light-shielding layer, and thus light input to the sides and the upper surface of an active layer can be blocked.

Claims (34)

1. An organic light-emitting display device, comprising:

light-emitting elements disposed on a substrate, each light-emitting element including an anode electrode;

pixel driving circuits, each pixel driving circuit connected to a corresponding light-emitting element of the light-emitting elements;

an upper light-shielding layer overlying the pixel driving circuits, the upper light-shielding layer including sides;

a bank layer providing emission areas in which the light-emitting elements are arranged, and the bank layer disposed to cover the sides of the upper light-shielding layer; and

a transparent conductive layer that is overlapping with the upper light-shielding layer and is non-overlapping with the anode electrode,

wherein an area of the upper light-shielding layer is smaller than an area of the anode electrode,

wherein the transparent conductive layer is disposed under the upper light-shielding layer, the transparent conductive layer being formed of a same material as the anode electrode, the transparent conductive layer is electrically connected to the anode electrode,

wherein the upper light-shielding layer is formed of an opaque conductive layer disposed on the transparent conductive layer, the upper light-shielding layer in contact with the transparent conductive layer,

wherein the bank layer is disposed overlaid in a pixel contact hole that the sides of the upper light-shielding layer are separated from an organic layer, and

wherein each pixel driving circuit includes a driving transistor connected to the corresponding light-emitting element, and the upper light-shielding layer is disposed on a drain electrode of the driving transistor in the pixel contact hole.

2. The organic light-emitting display device according to claim 1 , wherein the transparent conductive layer and the anode electrode are disposed on a planarization layer.

3. The organic light-emitting display device according to claim 1 , wherein the anode electrode is disposed in one of the emission areas, and the anode electrode contacts with the drain electrode in a boundary area of a driving circuit area and the one of the emission areas, and

the anode electrode extends to the driving circuit area to form the transparent conductive layer.

4. The organic light-emitting display device according to claim 1 , further comprising a plurality of sub-pixels, wherein each sub-pixel of the plurality of sub-pixels corresponds to a respective emission area of the emission areas in which the corresponding light-emitting element is arranged, wherein each sub-pixel further includes a transmission area, and wherein thin films formed of transparent materials are disposed between the bank layer and a portion of the substrate corresponding to a transparent area.

5. The organic light-emitting display device according to claim 1 , wherein each pixel driving circuit includes a storage capacitor connected to the driving transistor, and

wherein the upper light-shielding layer is overlying the storage capacitor.

6. An organic light-emitting display device comprising:

a substrate having an emission area and a driving circuit area;

at least one light emitting element disposed at the emission area, each light-emitting element having an anode electrode;

at least one transistor element disposed at the driving circuit area, the at least one transistor element being connected with the at least one light emitting element;

an upper light-shielding layer overlying the least one transistor element, the upper light-shielding layer including sides;

a bank layer providing the emission area in which the at least one light-emitting elements is arranged, and the bank layer disposed to cover the sides of the upper light-shielding layer; and

a transparent conductive layer that is overlapping with the upper light-shielding layer and is non-overlapping with the anode electrode,

wherein an area of the upper light-shielding layer is smaller than an area of the anode electrode,

wherein the transparent conductive layer is disposed under the upper light-shielding layer, the transparent conductive layer being formed of a same material as the anode electrode, the transparent conductive layer is electrically connected to the anode electrode,

wherein the upper light-shielding layer is formed of an opaque conductive layer disposed on the transparent conductive layer, the upper light-shielding layer being in contact with the transparent conductive layer,

wherein the bank layer is disposed overlaid in a pixel contact hole that the sides of the upper light-shielding layer are separated from an organic layer, and

wherein each of the least one transistor element includes a driving transistor connected to a respective light-emitting element of the least one light-emitting element, the upper light-shielding layer is disposed on a drain electrode of the driving transistor in the pixel contact hole.

7. The organic light-emitting display device according to claim 6 , wherein the transparent conductive layer and anode electrode are disposed on a planarization layer.

8. The organic light-emitting display device according to claim 6 , wherein the at least one transistor element includes a switching transistor.

9. The organic light-emitting display device according to claim 6 , wherein the light emitting area further includes a transmission area, and thin films formed of transparent materials are disposed at an area between the bank layer and a portion of the substrate corresponding to the transmission area.

10. The organic light-emitting display device according to claim 6 , further comprising a storage capacitor disposed in the driving circuit area, and

wherein the upper light-shielding layer is on the storage capacitor.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 7, 2018
From: KONG, IN-YEONG; PARK, JONG-SIN; LEE, DONG-YOON
To: LG DISPLAY CO., LTD.
Reel/Frame 047702/0812 →
Priority Claims (1)
KR 10-2017-0163237 · Nov 30, 2017 · national
Continuity (1)
Related Publication 20190165065A1 · May 30, 2019
Cited By (1)
US 12,200,982