# US 12,016,233 B2 · Display device

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- Number: US 12,016,233 B2
- Document ID: US12016233B2
- Status: Granted
- Kind: B2
- Application number: 17/356,190
- Filed: 2021-06-23
- Published: 2022-03-31
- Granted: 2024-06-18
- Earliest claimed: 2020-09-28
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Inok Kim; Youyoung Jin; Yousik Shin; Keunchan Oh; Gak Seok Lee; Sungjoon Cho; Sun-Kyu Joo
- Web page: https://patentgrep.com/patent/US12016233B2

## CPC

- G02F 1/133617: {Illumination with ultraviolet light; Luminescent elements or materials associated to the cell}
- H10K 59/38: comprising colour filters or colour changing media [CCM]
- H10K 59/879: {comprising refractive means, e.g. lenses}
- G02F 1/133514: {Colour filters}
- G02F 1/133603: {with LEDs}
- G02F 2202/36: Micro- or nanomaterials
- H10K 2102/331: {Nanoparticles used in non-emissive layers, e.g. in packaging layer}
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A display device may include a substrate, a first color conversion layer on the substrate, a low refractive layer on the first color conversion layer and including low refractive structures, a planarization layer on the low refractive layer, and a first color filter on the planarization layer. The planarization layer may also be between the low refractive structures.

## Claims

### Claim 1

A display device comprising:
a substrate;
a first color conversion layer on the substrate;
a low refractive layer on the first color conversion layer and comprising low refractive structures;
a planarization layer on the low refractive layer; and
a first color filter on the planarization layer,
wherein the planarization layer comprises a first portion forming a layer separated from the low refractive structures and positioned between the first color filter and the low refractive structures, and a second portion between the low refractive structures.

### Claim 2 (depends on 1)

The display device of claim 1, further comprising:
a second color conversion layer and a compensation layer, each being on the substrate and on a same layer as the first color conversion layer is on.

### Claim 3 (depends on 2)

The display device of claim 2, wherein the low refractive layer is also on the second color conversion layer.

### Claim 4 (depends on 2)

The display device of claim 2, wherein the low refractive layer is also on each of the second color conversion layer and the compensation layer.

### Claim 5 (depends on 2)

The display device of claim 2, wherein the first color conversion layer, the second color conversion layer, and the compensation layer are separated from each other by a partition wall.

### Claim 6 (depends on 2)

The display device of claim 2, further comprising:
a second color filter and a third color filter, each being on the planarization layer,
wherein the first color filter overlaps the first color conversion layer, the second color filter overlaps the second color conversion layer, and the third color filter overlaps the compensation layer.

### Claim 7 (depends on 1)

The display device of claim 1, wherein at least some of the low refractive structures are different from the remaining low refractive structures in index of refraction.

### Claim 8 (depends on 1)

The display device of claim 1, wherein a shell of at least some of the low refractive structures and a shell of the remaining low refractive structures are different from each other in thickness.

### Claim 9 (depends on 1)

The display device of claim 1, wherein the low refractive structures comprise a silica-based material.

### Claim 10 (depends on 1)

The display device of claim 1, wherein the planarization layer comprises an organic material.

### Claim 11 (depends on 1)

The display device of claim 1, wherein the planarization layer comprises an inorganic material.

### Claim 12

A display device comprising:
a substrate;
a first color conversion layer on the substrate;
a low refractive layer above the first color conversion layer and comprising low refractive structures, a plurality of the low refractive structures being arranged above, and overlapping with, the first color conversion layer; and
a first color filter above the low refractive layer,
wherein the first color filter also permeates between the plurality of the low refractive structures.

### Claim 13 (depends on 12)

The display device of claim 12, further comprising:
a second color conversion layer and a compensation layer, each being on the substrate and on a same layer as the first color conversion layer is on.

### Claim 14 (depends on 13)

The display device of claim 13, wherein the low refractive layer is also on the second color conversion layer.

### Claim 15 (depends on 13)

The display device of claim 13, wherein the low refractive layer is also on each of the second color conversion layer and the compensation layer.

### Claim 16 (depends on 13)

The display device of claim 13, wherein the first color conversion layer, the second color conversion layer, and the compensation layer are separated from each other by a partition wall.

### Claim 17 (depends on 13)

The display device of claim 13, further comprising:
a second color filter and a third color filter, each being on the low refractive layer,
wherein the first color filter overlaps the first color conversion layer, the second color filter overlaps the second color conversion layer, and the third color filter overlaps the compensation layer, and
wherein the second color filter and the third color filter are each between the low refractive structures.

### Claim 18 (depends on 12)

The display device of claim 12, wherein at least some of the low refractive structures are different from the remaining low refractive structures in index of refraction.

### Claim 19 (depends on 12)

The display device of claim 12, wherein a shell of at least some of the low refractive structures and a shell of the remaining low refractive structures are different from each other in thickness.

### Claim 20 (depends on 12)

The display device of claim 12, wherein the low refractive structures comprise a silica-based material.

### Claim 21

A display device comprising:
a substrate;
a first color conversion layer on the substrate;
a low refractive layer above the first color conversion layer and comprising low refractive structures; and
a first color filter above the low refractive layer,
wherein the first color filter also permeates between the low refractive structures, and
wherein the low refractive structures are spherical low refractive structures.