IP Library › Granted Patent US 12707785

Granted Patent B2

US 12707785 · App. 18/394,900 · Granted Aug 11, 2026

Display device with overlapping connection electrodes

Inventors: Hyun Deok Im (Yongin-si, KR); Jong Hyuk Kang (Yongin-si, KR); Buem Joon Kim (Yongin-si, KR); Soo Jo Ock (Yongin-si, KR)

Assignee: Samsung Display Co., Ltd.

H10H20/857 H10W90/00

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Quick Facts

Patent No.: US 12707785
App. No.: 18/394,900
Granted: Aug 11, 2026
Kind: B2

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Abstract

A includes electrodes comprising a first electrode, a second electrode, and a third electrode extending in a first direction and spaced in a second direction crossing the first direction, a first light emitting element, a second light emitting element, a third light emitting element, and a fourth light emitting element on the electrodes spaced in the second direction, a first connection electrode on the first electrode and connected to one end of the first light emitting element, a second connection electrode on the second electrode and connected to one end of the fourth light emitting element, a third connection electrode on the first electrode and the third electrode, and connected to an other end of the first light emitting element and one end of the second light emitting element, a fourth connection electrode, and a fifth connection electrode.

Claims (52)

1 . A display device, comprising:

electrodes comprising a first electrode, a second electrode, and a third electrode extending in a first direction and spaced in a second direction crossing the first direction;

a first light emitting element, a second light emitting element, a third light emitting element, and a fourth light emitting element on the electrodes spaced in the second direction;

a first connection electrode on the first electrode and connected to one end of the first light emitting element;

a second connection electrode on the second electrode and connected to one end of the fourth light emitting element;

a third connection electrode on the first electrode and the third electrode, and connected to an other end of the first light emitting element and one end of the second light emitting element;

a fourth connection electrode on the first electrode and the second electrode, and connected to an other end of the second light emitting element and one end of the third light emitting element;

a fifth connection electrode on the first electrode and the third electrode, and connected to an other end of the third light emitting element and an other end of the fourth light emitting element; and

an insulating layer between the third connection electrode and the fourth connection electrode,

wherein the third connection electrode and the fourth connection electrode overlap each other having the insulating layer disposed therebetween.

2 . The display device of claim 1 , wherein the third connection electrode comprises a first extension portion extending in the first direction, a second extension portion parallel to the first extension portion, and a first connection portion connecting the first extension portion and the second extension portion, and

3 . The display device of claim 2 , wherein the first connection portion of the third connection electrode and the second connection portion of the fourth connection electrode extend in the second direction, and

wherein the second extension portion of the third connection electrode and the second connection portion of the fourth connection electrode overlap each other.

4 . The display device of claim 2 , further comprising a bank layer on the first electrode, the second electrode, and the third electrode to divide an emission area where the first light emitting element, the second light emitting element, the third light emitting element, and the fourth light emitting element are located, and a sub-area other than the emission area.

5 . The display device of claim 4 , wherein the first connection portion of the third connection electrode and the second connection portion of the fourth connection electrode are in the sub-area, and

wherein the first connection portion and the second connection portion do not overlap each other in the sub-area.

6 . The display device of claim 4 , wherein the first extension portion, the second extension portion, the third extension portion, and the fourth extension portion cross the bank layer to extend to the sub-area.

7 . The display device of claim 4 , wherein the fourth connection electrode comprises a fifth extension portion extending in the first direction, and a third connection portion connecting the fifth extension portion and the fourth extension portion, and

wherein the third connection portion extends in the second direction and is in the emission area.

8 . The display device of claim 7 , wherein the fifth connection electrode comprises a sixth extension portion extending in the first direction, a seventh extension portion parallel to the sixth extension portion and a fourth connection portion connecting the sixth extension portion and the seventh extension portion, and

wherein the fourth connection portion extends in the second direction and is in the sub-area.

9 . The display device of claim 8 , wherein the fifth extension portion of the fourth connection electrode is connected to the one end of the third light emitting element, the sixth extension portion of the fifth connection electrode is connected to the other end of the third light emitting element, the seventh extension portion of the fifth connection electrode is connected to the one end of the fourth light emitting element, and the second connection electrode is connected to the other end of the fourth light emitting element.

10 . The display device of claim 2 , wherein the fourth extension portion of the fourth connection electrode is between the first electrode and the second extension portion of the third connection electrode, and does not overlap the first light emitting element, the second light emitting element, the third light emitting element, and the fourth light emitting element.

11 . The display device of claim 2 , wherein the first connection electrode is connected to the one end of the first light emitting element,

wherein the first extension portion of the third connection electrode is connected to the other end of the first light emitting element,

wherein the second extension portion of the third connection electrode is connected to the one end of the second light emitting element, and

wherein the third extension portion of the fourth connection electrode is connected to the other end of the second light emitting element.

12 . The display device of claim 1 , wherein the first connection electrode, the second connection electrode, and the fourth connection electrode are under the insulating layer, and

wherein the third connection electrode and the fifth connection electrode are on the insulating layer.

13 . A display device, comprising:

electrodes comprising a first electrode, a second electrode, and a third electrode extending in a first direction and spaced in a second direction crossing the first direction;

a first light emitting element, a second light emitting element, a third light emitting element, and a fourth light emitting element on the electrodes spaced in the second direction;

a bank layer on the first electrode, the second electrode, and the third electrode to divide an emission area where the first light emitting element, the second light emitting element, the third light emitting element, and the fourth light emitting element are located and a sub-area other than the emission area;

a first connection electrode on the first electrode and connected to one end of the first light emitting element;

a second connection electrode on the second electrode and connected to one end of the fourth light emitting element;

a third connection electrode on the first electrode and the third electrode, and connected to an other end of the first light emitting element and one end of the second light emitting element;

a fourth connection electrode on the first electrode and the second electrode, and connected to an other end of the second light emitting element and one end of the third light emitting element;

an insulating layer between the third connection electrode and the fourth connection electrode and between the fourth connection electrode and the fifth connection electrode; and

wherein the third connection electrode and the fourth connection electrode overlap each other on the bank layer, and

wherein the fourth connection electrode and the fifth connection electrode overlap each other on the bank layer.

14 . The display device of claim 13 , wherein the third connection electrode comprises a first extension portion extending in the first direction, a second extension portion parallel to the first extension portion, and a first connection portion connecting the first extension portion and the second extension portion,

wherein the fourth connection electrode comprises a third extension portion extending in the first direction, a fourth extension portion parallel to the third extension portion, a fifth extension portion extending in the first direction, a second connection portion connecting the third extension portion and the fourth extension portion, and a third connection portion connecting the fourth extension portion and the fifth extension portion,

wherein the fifth connection electrode comprises a sixth extension portion extending in the first direction, a seventh extension portion parallel to the sixth extension portion, and a fourth connection portion connecting the sixth extension portion and the seventh extension portion.

15 . The display device of claim 14 , wherein, on the bank layer, the first connection portion of the third connection electrode and the second connection portion of the fourth connection electrode overlap each other, and the fifth extension portion of the fourth connection electrode and the fourth connection portion of the fifth connection electrode overlap each other.

16 . The display device of claim 14 , wherein, on the bank layer, the first connection electrode and the first connection portion of the third connection electrode overlap each other, and the second extension portion of the third connection electrode and the second connection portion of the fourth connection electrode overlap each other.

17 . The display device of claim 14 , wherein the second extension portion of the third connection electrode is parallel to the fourth extension portion of the fourth connection electrode and does not overlap each other.

18 . The display device of claim 14 , wherein the second extension portion of the third connection electrode is parallel to the fourth extension portion of the fourth connection electrode and overlap each other.

19 . The display device of claim 18 , wherein the third connection portion of the fourth connection electrode overlaps the seventh extension portion of the fifth connection electrode in the emission area.

20 . The display device of claim 14 , wherein the length of the first connection portion of the third connection electrode is the same as the length of the fourth connection portion of the fifth connection electrode, and

wherein each of the lengths of the first connection portion of the third connection electrode and the fourth connection portion of the fifth connection electrode is greater than the length of the second connection portion.