Display device

Inventors: Ji Seong Yang (Suwon-si, KR); Min-Hee Kim (Ansan-si, KR); Tae Hoon Kim (Suwon-si, KR); Joon-Hyung Park (Seoul, KR); Simbum Yuk (Hwaseong-si, KR); Kang Seob Jeong (Hwaseong-si, KR)

Assignee: Samsung Display Co., Ltd.

H10H20/8514 H10H20/841 H10H20/853 H10H20/857 H10W90/00

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Quick Facts

Patent No.: US 12677510
App. No.: 17/975,812
Granted: Jul 7, 2026
Kind: B2

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Abstract

Provided is a display device including a substrate, light emitting diodes disposed on the substrate, a first encapsulation layer disposed on the light emitting diodes, a bank disposed on the first encapsulation layer to define openings and a well; a color conversion layer and a transmission layer individually disposed within the openings, and a reflective layer disposed within the well and disposed between the color conversion layer and the transmission layer.

Claims (37)

1 . A display device comprising:

a substrate;

a plurality of light emitting diodes disposed on the substrate;

a first encapsulation layer disposed on the light emitting diodes;

a bank disposed on the first encapsulation layer configured to define openings and a well;

a color conversion layer or a transmission layer disposed in each of the openings; and

a reflective layer disposed within the well and disposed between the color conversion layer and the transmission layer.

2 . The display device of claim 1 , wherein each of the color conversion layer and the transmission layer overlaps one of the light emitting diodes, and the reflective layer does not overlap any of the light emitting diodes.

3 . The display device of claim 1 , wherein a height of the reflective layer is lower than a height of the color conversion layer or the transmission layer in a thickness direction.

4 . The display device of claim 1 , further comprising a second encapsulation layer disposed on the bank, the color conversion layer, the transmission layer, and the reflective layer,

wherein the second encapsulation layer includes a low refractive index layer.

5 . The display device of claim 4 , further comprising:

a first color filter disposed on the second encapsulation layer to overlap the color conversion layer and the reflective layer; and

a second color filter disposed on the second encapsulation layer to overlap the transmission layer and the reflective layer.

6 . The display device of claim 1 , wherein a lower surface of the bank is in contact with an upper surface of the first encapsulation layer.

7 . The display device of claim 1 , wherein a lower surface of the color conversion layer and a lower surface of the transmission layer are in contact with an upper surface of the first encapsulation layer.

8 . The display device of claim 1 , wherein a lower surface of the reflective layer is in contact with an upper surface of the first encapsulation layer.

9 . The display device of claim 1 , wherein the well is formed in a form of a groove in the bank.

10 . The display device of claim 1 , wherein an area of the well is smaller than an area of each of the openings.

11 . The display device of claim 1 , wherein the well is partitioned into a plurality of portions by the bank, and the plurality of portions include a first portion disposed at a central portion and at least four second portions surrounding the first portion at each vertex.

12 . The display device of claim 1 , wherein the bank has surface energy of 25 dyne/cm or less.

13 . The display device of claim 1 , wherein the bank is transparent.

14 . The display device of claim 1 , wherein the reflective layer is formed by curing white ink.

15 . The display device of claim 1 , wherein the color conversion layer includes quantum dots and scatterers, and the transmission layer and the reflective layer include scatterers.

16 . A display device comprising

a substrate;

first, second, and third transistors disposed on the substrate;

an insulating layer disposed on the first, second, and third transistors;

first, second, and third light emitting diodes disposed on the insulating layer and electrically connected to the first, second, and third transistors, respectively;

an encapsulation layer disposed on the first, second, and third light emitting diodes to include an inorganic layer and an organic layer;

a bank disposed on the encapsulation layer to define first, second, and third openings and a well;

a first color conversion layer, a second color conversion layer, and a transmission layer disposed in first, second, and third openings to overlap the first, second, and third light emitting diodes, respectively; and

a reflective layer disposed within the well and disposed between the first color conversion layer or the second color conversion layer and the transmission layer.

17 . The display device of claim 16 , wherein a height of the reflective layer is lower than a height of the first color conversion layer, the second color conversion layer, or the transmission layer.

18 . The display device of claim 16 , wherein the bank has surface energy of 25 dyne/cm or less.

19 . The display device of claim 16 , wherein the first and second color conversion layers include quantum dots and scatterers, and the transmission layer and the reflective layer include scatterers.

20 . The display device of claim 16 , wherein each of the bank, the first color conversion layer, the second color conversion layer, and the transmission layer is in contact with the encapsulation layer.