Touch display device

Patent metadata

Field	Value
Publication number	US-11985848-B2
Application number	US-202217718036-A
Country	US
Kind code	B2
Filing date	Apr 11, 2022
Priority date	Dec 5, 2019
Publication date	May 14, 2024
Grant date	May 14, 2024

Abstract

A touch display device exhibiting low reflectivity is disclosed. The touch display device includes a light-blocking stack composed of at least two light-blocking color layers overlapping a plurality of touch electrodes disposed on an encapsulation unit, and a low-reflection layer disposed on the light-blocking stack, thereby absorbing external light without a separate polarizing plate, thus exhibiting low reflectivity.

First claim

What is claimed is:

1. A touch display device, comprising:
a substrate;
a light-emitting element on the substrate;
an encapsulation unit on the light-emitting element;
a plurality of touch electrodes on the encapsulation unit;
red, green, and blue color filters overlapping the light-emitting element,
a light-blocking stack disposed on the plurality of touch electrodes and having at least two color filters stacked among the red, green, and blue color filters, light-blocking stack overlapping the plurality of touch electrodes; and
a low-reflection layer on the light-blocking stack,
wherein the low-reflection layer covers an upper surface and a side surface of the light-blocking stack, and
wherein the low-reflection layer overlaps the plurality of touch electrodes.

2. The touch display device according to claim 1 , wherein the at least two color filters realize different colors from each other.

3. The touch display device according to claim 1 , further comprising:
wherein the light-blocking stack includes:
a first light-blocking color layer formed of either a same or substantially the same material as one of the red and green color filters; and
a second light-blocking color layer on the first light-blocking color layer and formed of either a same or substantially the same material as the blue color filter.

4. The touch display device according to claim 1 ,
wherein the light-blocking stack includes:
a first light-blocking color layer formed of either a same or substantially the same material as the red color filter;
a second light-blocking color layer formed of either a same or substantially the same material as the green color filter; and
a third light-blocking color layer formed of either a same or substantially the same material as the blue color filter.

5. The touch display device according to claim 1 , wherein the low-reflection layer is formed in either a single-layered or multi-layered structure using at least one of TiOx, CuNx, CuMg, CuS, AlON, AlTiN, MoTaOx, or MoTiON.

6. The touch display device according to claim 1 , further comprising:
a routing line electrically connected to the touch electrodes and disposed along a side surface of the encapsulation unit; and
a touch pad electrically connected to the routing line.

7. The touch display device according to claim 6 , further comprising:
a touch protective film on the low-reflection layer and on the substrate in a region spaced apart from the touch pad.

8. The touch display device according to claim 6 , wherein at least one of the light-blocking stack or the low-reflection layer overlaps the routing line.

9. The touch display device according to claim 6 , wherein the encapsulation unit includes a plurality of inorganic encapsulation layers and at least one organic encapsulation layer.

10. The touch display device according to claim 9 , wherein at least one of the plurality of inorganic encapsulation layers extends more toward the touch pad than the at least one organic encapsulation layer.

11. The touch display device according to claim 1 , further comprising:
a bank disposed under the encapsulation unit,
wherein the low-reflection layer overlaps with the bank.

12. The touch display device according to claim 1 , further comprising:
a touch planarization layer disposed between the touch electrode and the light-blocking stack and disposed on the substrate in a region spaced apart from the touch pad.

13. The touch display device according to claim 1 , wherein the low-reflection layer is formed of a low-reflection material having reflectivity having a single-digit percentage (%).

14. The touch display device according to claim 1 , wherein:
the at least two color filters of the light-blocking stack include a first light-blocking color layer and a second light-blocking color layer stacked on the first light-blocking color layer,
the second light-blocking color layer has a first surface and a second surface extending from the first surface, and
the low-reflection layer covers the first and second surfaces of the second light-blocking color layer.

15. The touch display device according to claim 1 , wherein the low-reflection layer is directly connected to a surface of the light-blocking stack.

Assignees

• Lg Display Co Ltd

Inventors

• Oh Jae-Young
• Kim Tae-Hwan

Classifications

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title

• H10K59/8731

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• H10K50/865 Primary

  comprising light absorbing layers, e.g. light-blocking layers · CPC title

• G06F3/0446 Primary

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title