IP Library Granted Patent US 11,385,749
Granted Patent B2
US 11,385,749 · App. 17/136,449 · Granted Jul 12, 2022

Touch display device

Inventors: Seung-Hyun Youk (Paju-si, KR); Min-Joo Kim (Seoul, KR); Sang-Hyuk Won (Gimpo-si, KR)
Assignee: LG DISPLAY CO., LTD.
G06F3/0445G06F3/0412G06F3/0448H01Q1/2266G06F2203/04103G06F2203/04112
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Quick Facts
Patent No.
US 11,385,749
App. No.
17/136,449
Granted
Jul 12, 2022
Kind
B2
Abstract

Discussed is a touch display device having an antenna disposed in a panel, thereby improving product reliability while reducing manufacturing cost. The touch display device includes a display unit including a plurality of pixels disposed in an active area, an encapsulation unit disposed on the display unit, the encapsulation unit being configured to seal the plurality of pixels, a touch sensor unit including a plurality of touch sensors disposed on the encapsulation unit, an antenna pattern disposed at an edge on the touch sensor unit in the state in which a planarization layer is interposed therebetween, the antenna pattern not overlapping a touch electrode and a touch routing line included in the touch sensor unit, and a ground plane disposed in an identical layer to any one metal layer belonging to the display unit, the ground plane overlapping the antenna pattern.

Claims (35)

1. A touch display device comprising:

a display unit comprising a plurality of pixels disposed in an active area;

an encapsulation unit disposed on the display unit, the encapsulation unit being configured to seal the plurality of pixels;

a touch sensor unit comprising a plurality of touch sensors disposed on the encapsulation unit;

an antenna pattern disposed at an edge on the touch sensor unit in a state in which a planarization layer is interposed therebetween, the antenna pattern not overlapping a touch electrode and a touch routing line included in the touch sensor unit; and

a ground plane disposed in an identical layer to any one metal layer belonging to the display unit, the ground plane overlapping the antenna pattern,

wherein the antenna pattern comprises:

a plurality of radiation patterns disposed in the active area on the planarization layer so as to be spaced apart from the touch electrode by a minimum distance; and

a feeding unit disposed on the planarization layer in a bezel area adjacent to the active area, the feeding unit being commonly connected to the plurality of radiation patterns, and

the feeding unit overlaps the ground plane disposed in the bezel area in the display unit.

2. The touch display device according to claim 1 , wherein the touch sensor unit comprises a plurality of touch electrodes disposed in the active area,

a touch electrode adjacent to the antenna pattern, among the plurality of touch electrodes, is a different-shaped touch electrode having a different shape from other touch electrodes, and

the different-shaped touch electrode comprises an upper touch electrode and a lower touch electrode connected to each other via a contact hole.

3. The touch display device according to claim 2 , wherein each of the plurality of radiation patterns has a mesh pattern shape overlapping non-emissive areas of the plurality of pixels in the active area of the display unit.

4. The touch display device according to claim 2 , wherein the plurality of radiation patterns are individually spaced apart from a plurality of different-shaped touch electrodes adjacent to the bezel area in the active area.

5. A touch display device comprising:

a display unit comprising a plurality of pixels disposed in an active area;

an encapsulation unit disposed on the display unit, the encapsulation unit being configured to seal the plurality of pixels;

a touch sensor unit comprising a plurality of touch sensors disposed on the encapsulation unit:

an antenna pattern disposed at an edge on the touch sensor unit in a state in which a planarization layer is interposed therebetween, the antenna pattern not overlapping a touch electrode and a touch routing line included in the touch sensor unit; and

a ground plane disposed in an identical layer to any one metal layer belonging to the display unit, the ground plane overlapping the antenna pattern,

wherein the planarization layer is disposed only between the touch sensor unit and the antenna pattern.

6. The touch display device according to claim 2 , wherein the touch sensor unit comprises a touch buffer layer, a bridge metal layer, a touch insulating layer, a sensor metal layer, and a touch passivation layer sequentially stacked on the encapsulation unit,

the sensor metal layer comprises first and second touch electrodes constituting each touch sensor, a second bridge electrode configured to interconnect adjacent second touch electrodes, the upper touch electrode of the different-shaped touch electrode, and a plurality of touch routing lines connected to the first and second touch electrodes,

the bridge metal layer comprises a first bridge electrode configured to interconnect adjacent first touch electrodes and the lower touch electrode of the different-shaped touch electrode,

the first bridge electrode partially overlaps the second touch electrode or the second bridge electrode in a state in which the touch insulating layer is interposed therebetween, and

the first touch electrode, the second touch electrode, the different-shaped touch electrode, and at least one of the first bridge electrode and the second bridge electrode have a mesh pattern shape overlapping the non-emissive areas of the plurality of pixels.

7. The touch display device according to claim 6 , wherein the plurality of touch routing lines are disposed in bezel areas other than a bezel area in which the antenna pattern is located.

8. The touch display device according to claim 6 , wherein a plurality of insulating layers at least comprising the touch passivation layer and the planarization layer are located between the ground plane and the antenna pattern in the bezel area.

9. The touch display device according to claim 6 , wherein the upper and lower touch electrodes are connected to each other via a contact hole formed in the touch insulating layer, and

the lower touch electrode is connected to the first bridge electrode.

10. The touch display device according to claim 3 , wherein each of the plurality of radiation patterns comprises at least two edges opposite two edges of the different-shaped touch electrode, and

the at least two edges of each of the plurality of radiation patterns are disposed so as to be parallel to or so as not to be parallel to the two edges of the different-shaped touch electrode.

11. The touch display device according to claim 10 , wherein a minimum distance between each of the plurality of radiation patterns and the different-shaped touch electrode is approximately 550 μm or more, and is less than a diagonal length of each of other touch electrodes.

12. The touch display device according to claim 11 , wherein a width of each of the plurality of radiation patterns is greater than the minimum distance, and is greater than a width of the different-shaped touch electrode.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 20, 2021
From: YOUK, SEUNG-HYUN; KIM, MIN-JOO; WON, SANG-HYUK
To: LG DISPLAY CO., LTD.
Reel/Frame 054967/0212 →
Priority Claims (1)
KR 10-2019-0179869 · Dec 31, 2019 · national
Continuity (1)
Related Publication 20210200379A1 · Jul 1, 2021
Cited By (1)
US 12,422,959