Touch display device

Patent metadata

Field	Value
Publication number	US-11036325-B2
Application number	US-202016928763-A
Country	US
Kind code	B2
Filing date	Jul 14, 2020
Priority date	Aug 30, 2019
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

Provided is a touch display device. Because a shielding electrode, which is disposed in a non-active area and electrically coupled between a common electrode and a common voltage supply line, is located between a touch routing line and a signal line, the effects of noise caused by the signal line on the touch routing line may be reduced. Further, an encapsulation portion located on the shielding electrode has a planarized structure. The resulting maintenance of a certain distance between the shielding electrode and the touch routing line may reduce noise caused by the signal line from indirectly affecting the touch routing line through the shielding electrode.

First claim

What is claimed is:

1. A touch display device comprising:
an active area in which a plurality of light emitting elements are disposed;
a non-active area defined outside of the active area, in which a plurality of signal lines are disposed;
an encapsulation portion disposed in the active area and the non-active area and located on the plurality of light emitting elements and the plurality of signal lines;
a plurality of touch electrodes disposed in the active area on the encapsulation portion;
a plurality of touch routing lines disposed in the non-active area on the encapsulation portion and electrically coupled to the plurality of touch electrodes;
a shielding electrode located under the encapsulation portion in the non-active area, with at least a part thereof located on the plurality of signal lines, and electrically coupled to a common electrode of the plurality of light emitting elements; and
a common voltage supply line located under the shielding electrode and electrically coupled to the shielding electrode,
wherein at least one of the shielding electrode or the common voltage supply line is disposed in an area including an area in which the plurality of touch routing lines overlap with the plurality of signal lines in the non-active area.

2. The touch display device according to claim 1 , wherein the plurality of signal lines are located between the active area and the common voltage supply line.

3. The touch display device according to claim 1 , wherein at least one of the plurality of signal lines is disposed in an area overlapping with the common voltage supply line.

4. The touch display device according to claim 3 , wherein a width of the common voltage supply line is larger than a width of the at least one of the plurality of signal lines overlapping with the common voltage supply line.

5. The touch display device according to claim 1 , wherein the shielding electrode includes:
a first part located on the plurality of signal lines; and
a second part connected to the first part and located on one side of at least one of the plurality of signal lines.

6. The touch display device according to claim 1 , wherein the shielding electrode is formed of a same material as pixel electrodes of the plurality of light emitting elements.

7. The touch display device according to claim 1 , wherein the common voltage supply line is disposed in a same layer as one of the plurality of signal lines.

8. The touch display device according to claim 7 , wherein the common voltage supply line is disposed in a same layer as a signal line from the plurality of signal lines at a lowest position among the plurality of signal lines.

9. The touch display device according to claim 1 , wherein a part of the plurality of signal lines, disposed in an area other than an area overlapping with the shielding electrode and the common voltage supply line, is disposed in an area other than an area overlapping with the plurality of touch routing lines.

10. The touch display device according to claim 1 , wherein at least a part of the encapsulation portion, disposed in the non-active area, includes an inclined surface, and a part of the plurality of touch routing lines are disposed on the inclined surface.

11. The touch display device according to claim 1 , wherein a top surface of the encapsulation portion overlapping with the shielding electrode in the non-active area is flat.

Assignees

• Lg Display Co Ltd

Inventors

• Lee Yangsik
• Lee Hwideuk
• Jo Jungho

Classifications

• H10K59/873

  Encapsulations · CPC title

• H10K59/40

  OLEDs integrated with touch screens · CPC title

• G06F3/041 Primary

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• H10K59/87

  Passivation; Containers; Encapsulations · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title