Granted Patent B2

US 12,334,479 · App. 18/466,436 · Granted Jun 17, 2025

Inventors: Seung Min Lee (Yongin-si, KR); Jin Yeong Kim (Yongin-si, KR); Sang Ho Park (Yongin-si, KR); Tae Hoon Yang (Yongin-si, KR); Sung Jin Lee (Yongin-si, KR); Jin Woo Lee (Yongin-si, KR)

Assignee: SAMSUNG DISPLAY CO., LTD.

H01L25/0753H10H29/142

Abstract

Claims (41)

1. A display device comprising:

a substrate;

a display element layer disposed on a first surface of the substrate and including a light emitting element that emits light, the display element layer including:

a first contact electrode electrically connected to a first end of the light emitting element; and

a second contact electrode electrically connected to a second end of the light emitting element; and

a pixel circuit layer disposed on the display element layer and including a transistor electrically connected to the light emitting element, the pixel circuit layer including:

a reflective layer disposed on the display element layer and overlapping the light emitting element, wherein

one of the first contact electrode and the second contact electrode is electrically connected to the transistor,

the reflective layer reflects the light emitted from the light emitting element toward a second surface of the substrate, and

the display element layer comprises:

banks disposed on and above the substrate and spaced apart from each other with the light emitting element disposed between the banks, each bank extending above the light emitting element disposed; and

a first electrode and a second electrode disposed on the banks and spaced apart from each other with the light emitting element disposed between the first electrode and the second electrode.

2. The display device according to claim 1 , wherein

the first contact electrode is disposed on the first electrode and electrically connected to the first electrode, and

the second contact electrode is disposed on the second electrode and electrically connected to the second electrode.

3. A display device comprising:

a substrate;

a display element layer disposed on a first surface of the substrate and including a light emitting element that emits light, the display element layer including:

a first contact electrode electrically connected to a first end of the light emitting element;

a second contact electrode electrically connected to a second end of the light emitting element;

a first electrode electrically connected to the first contact electrode; and

a second electrode electrically connected to the second contact electrode; and

a pixel circuit layer disposed on the display element layer and including a transistor electrically connected to the light emitting element, wherein

a top surface of the first contact electrode facing the substrate and a top surface of the first electrode facing the substrate directly contact a bottom surface of an insulating layer facing away from the substrate,

one of the first electrode and the second electrode is electrically connected to the transistor, and

the light emitted from the light emitting element is emitted toward a second surface of the substrate.

4. The display device according to claim 3 , wherein

the display element layer includes a second insulating layer disposed on the substrate and including an opening through which a portion of one of the first electrode and the second electrode is exposed, and

the one of the first and the second electrodes is electrically connected to the transistor through the opening.

5. The display device according to claim 3 , wherein

the light emitting element is disposed on the substrate,

the first contact electrode is disposed on the substrate and a first end of the light emitting element, and

the second contact electrode is disposed on the substrate and a second end of the light emitting element.

6. The display device according to claim 3 , wherein the first electrode is disposed on the substrate and the first contact electrode, the second electrode is disposed on the substrate and the second contact electrode, and the first electrode and the second electrode are spaced apart from each other with the light emitting element disposed between the first electrode and the second electrode.

7. The display device according to claim 3 , wherein each of the first electrode and the second electrode is a reflective electrode that reflects the light emitted from the light emitting element toward the second surface of the substrate.

8. The display device according to claim 7 , wherein the display element layer comprises:

banks disposed on the substrate and spaced apart from each other with the light emitting element disposed between the banks, wherein the first electrode and the second electrode are directly disposed on the banks and spaced apart from each other with the light emitting element disposed between the first electrode and the second electrode.

9. The display device according to claim 3 , wherein a side surface of the first contact electrode facing in a direction substantially parallel to the first surface of the substrate directly contacts a side surface of the first electrode facing in the direction substantially parallel to the first surface of the substrate.

10. The display device according to claim 3 , wherein a side surface of the first contact electrode facing in a direction substantially parallel to the first surface of the substrate directly contacts a side surface of the light emitting element facing in the direction substantially parallel to the first surface of the substrate.

11. The display device according to claim 1 , wherein the pixel circuit layer is disposed on the reflective layer.

12. The display device according to claim 1 , wherein the first electrode and the second electrode are disposed directly on the banks, respectively.

Assignments (1)

Priority Claims (1)

Continuity (2)

References Cited (25)