Touch display device

Patent metadata

Field	Value
Publication number	US-11329260-B2
Application number	US-202016924017-A
Country	US
Kind code	B2
Filing date	Jul 8, 2020
Priority date	Dec 5, 2019
Publication date	May 10, 2022
Grant date	May 10, 2022

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;
a light-blocking stack including at least two light-blocking color layers overlapping the plurality of touch electrodes;
a low-reflection layer on the light-blocking stack; and
red, green, and blue color filters overlapping the light-emitting element,
wherein the at least two light-blocking color layers include:
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.

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

3. 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;
a light-blocking stack including at least two light-blocking color layers overlapping the plurality of touch electrodes;
a low-reflection layer on the light-blocking stack; and
red, green, and blue color filters overlapping the light-emitting element,
wherein the at least two light-blocking color layers include:
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.

4. 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 TiO x , CuN x , CuMg, CuS, AlON, AlTiN, MoTaO x , or MoTiON.

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

6. The touch display device according to claim 5 , further comprising:
a touch protective film on the low-reflection layer and on the substrate in a region spaced apart from the touch pad.

7. The touch display device according to claim 5 , wherein at least one of the light-blocking stack or the low-reflection layer overlaps the routing line.

8. The touch display device according to claim 5 , wherein the encapsulation unit includes a plurality of inorganic encapsulation layers and at least one organic encapsulation layer.

9. The touch display device according to claim 8 , 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.

10. 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.

11. 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.

12. The touch display device according to claim 3 , further comprising:
a routing line connected to the touch electrodes and disposed along a side surface of the encapsulation unit; and
a touch pad connected to the routing line.

13. The touch display device according to claim 12 , further comprising:
a touch protective film on the low-reflection layer and on the substrate in a region spaced apart from the touch pad.

14. The touch display device according to claim 12 , wherein at least one of the light-blocking stack or the low-reflection layer overlaps the routing line.

15. The touch display device according to claim 3 , further comprising:
a bank disposed under the encapsulation unit,
wherein the low-reflection layer overlaps with the bank.

16. The touch display device according to claim 3 , 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.

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

  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