# US 11,029,563 B2 · Color conversion substrate and related display device

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- Number: US 11,029,563 B2
- Document ID: US11029563B2
- Status: Granted
- Kind: B2
- Application number: 16/161,006
- Filed: 2018-10-15
- Published: 2019-10-10
- Granted: 2021-06-08
- Earliest claimed: 2018-04-09
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Seung Jin Chu; Yeo Geon Yoon; Won Tae Kim; Hoon Kim; Hee Keun Lee
- Web page: https://patentgrep.com/patent/US11029563B2

## CPC

- G02F 1/133617: {Illumination with ultraviolet light; Luminescent elements or materials associated to the cell}
- G02F 1/133514: {Colour filters}
- G02F 1/133528: {Polarisers}
- G02F 1/133621: {providing coloured light (G02F1/133617, G02F1/133533 take precedence)}
- G02F 1/133614: {using photoluminescence, e.g. phosphors illuminated by UV or blue light}
- G02F 2201/121: common or background
- 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

## Abstract

A color conversion substrate for displaying a first color, a second color, and a third color may include a base substrate, a first light-blocker, a second light-blocker, a pattern layer, a first color converter, and a second color converter. The first light-blocker contacts a surface of the base substrate and may block first light of the third color. The second light-blocker contacts the surface of the base substrate and may block second light of the third color. The pattern layer is disposed on the first light-blocker and the second light-blocker and includes an optical pattern that includes protrusions. The first color converter overlaps the first light-blocker and may convert a first portion of incident light into light of the first color. The second color converter overlaps the second light-blocker and may convert a second portion of the incident light into light of the second color.

## Claims

### Claim 1

A color conversion substrate for displaying a first color, a second color, and a third color, the color conversion substrate comprising:
a base substrate;
a first light-blocking portion disposed on a surface of the base substrate and configured to block first light of the third color;
a second light-blocking portion disposed on the surface of the base substrate and configured to block second light of the third color;
a first pattern layer disposed on the first light-blocking portion and the second light-blocking portion and comprising a first optical pattern, wherein the first optical pattern comprises first-set protrusions;
a first color conversion layer overlapping the first light-blocking portion and configured to convert a first portion of incident light into light of the first color; and
a second color conversion layer overlapping the second light-blocking portion and configured to convert a second portion of the incident light into light of the second color,
wherein a first-set protrusion of the first-set protrusions protrudes into a recess of the first color conversion layer in a direction perpendicular to the surface of the base substrate, and wherein the recess of the first color conversion layer does not include any portion which does not overlap the first light-blocking portion in the direction perpendicular to the surface of the base substrate.

### Claim 2 (depends on 1)

The color conversion substrate of claim 1, wherein the first light-blocking portion, the second light-blocking portion, and the first pattern layer are made of a same material, and
wherein the first-set protrusion of the first-set protrusions completely overlaps the first color conversion layer and the first light-blocking portion in the direction perpendicular to the surface of the base substrate.

### Claim 3 (depends on 1)

The color conversion substrate of claim 1, wherein the first light-blocking portion is a first color filter configured to transmit the light of the first color, wherein the second light-blocking portion is a second color filter configured to transmit the light of the second color, wherein the first pattern layer comprises a first pattern portion and a second pattern portion, wherein the first pattern portion is made of a same material as the first color filter and overlaps the first color filter, and wherein the second pattern portion is made of a same material as the second color filter and overlaps the second color filter.

### Claim 4 (depends on 1)

The color conversion substrate of claim 1, wherein the first pattern layer is made of a light-transmitting organic material, and
wherein the first-set protrusion of the first-set protrusions completely overlaps the first color conversion layer and the first light-blocking portion in the direction perpendicular to the surface of the base substrate.

### Claim 5 (depends on 1)

The color conversion substrate of claim 1, wherein a width of the first-set protrusion of the first-set protrusions is greater than 0 μm and is equal to or less than 5 μm, wherein a height of the first-set protrusion is greater than 0 μm and is equal to or less than 1.5 μm, and wherein a distance between two immediately adjacent protrusions of the first-set protrusions is greater than 0 μm and is equal to or less than 10 μm.

### Claim 6 (depends on 1)

The color conversion substrate of claim 1, further comprising:
a light-transmitting layer overlapping the base substrate, wherein the second color conversion layer is positioned between the first color conversion layer and the light-transmitting layer.

### Claim 7 (depends on 6)

The color conversion substrate of claim 6, further comprising:
a color filter disposed between the light-transmitting layer and the surface of the base substrate and configured to transmit third light of the third color, wherein the first pattern layer overlaps the color filter.

### Claim 8 (depends on 6)

The color conversion substrate of claim 6, further comprising:
a color filter disposed between the light-transmitting layer and the surface of the base substrate and configured to transmit third light of the third color; and
a second pattern layer disposed on the color filter and comprising a second optical pattern,
wherein the second optical pattern comprises second-set protrusions,
wherein the second pattern layer is made of a same material as the color filter, and
wherein a second-set protrusion of the second-set protrusions completely overlaps the light-transmitting layer and the color filter in the direction perpendicular to the surface of the base substrate.

### Claim 9 (depends on 1)

The color conversion substrate of claim 1, further comprising:
a dichroic reflective layer disposed on the first color conversion layer and the second color conversion layer, configured to transmit the first light of the third color and the second light of the third color, and configured to reflect a portion of the light of the first color and a portion of the light of the second color.

### Claim 10 (depends on 1)

The color conversion substrate of claim 1, further comprising:
a second pattern layer disposed on the first color conversion layer and comprising a second optical pattern, wherein the second optical pattern comprises second-set protrusions; and
a third pattern layer disposed on the second color conversion layer and comprising a third optical pattern, wherein the third optical pattern comprises third-set protrusions,
wherein a second-set protrusion of the second-set protrusions completely overlaps the first color conversion layer and the first light-blocking portion in the direction perpendicular to the surface of the base substrate, and
wherein a third-set protrusion of the third-set protrusions completely overlaps the second color conversion layer and the second light-blocking portion in the direction perpendicular to the surface of the base substrate.

### Claim 11 (depends on 10)

The color conversion substrate of claim 10, wherein the second pattern layer is made of a same material as the first color conversion layer, and wherein the third pattern layer is made of a same material as the second color conversion layer.

### Claim 12 (depends on 10)

The color conversion substrate of claim 10, wherein the second pattern layer and the third pattern layer are made of a light-transmitting organic material.

### Claim 13 (depends on 1)

The color conversion substrate of claim 1, wherein the first color conversion layer and the second color conversion layer include quantum dots.

### Claim 14

A display device comprising:
a display substrate;
a first pixel electrode, a second pixel electrode and a third pixel electrode disposed on the display substrate; and
a color conversion substrate overlapping the display substrate and configured to display a first color, a second color, and a third color,
wherein the color conversion substrate comprises:
a base substrate;
a first light-blocking portion disposed on a surface of the base substrate facing the display substrate, overlapping the first pixel electrode, and configured to block first light of the third color;
a second light-blocking portion disposed on the surface of the base substrate, overlapping the second pixel electrode, and configured to block second light of the third color;
a pattern layer disposed on the first light-blocking portion and the second light-blocking portion and comprising a first optical pattern, wherein the first optical pattern comprises first-set protrusions protruding toward the display substrate;
a first color conversion layer overlapping the first light-blocking portion and configured to convert a first portion of incident light into light of the first color; and
a second color conversion layer overlapping the second light-blocking portion and configured to convert a second portion of the incident light into light of the second color,
wherein a first-set protrusion of the first-set protrusions protrudes into a recess of the first color conversion layer in a direction perpendicular to the surface of the base substrate, and wherein the recess of the first color conversion layer does not include any portion which does not overlap the first light-blocking portion in the direction perpendicular to the surface of the base substrate.

### Claim 15 (depends on 14)

The display device of claim 14, wherein the color conversion substrate further comprises:
a light-transmitting layer overlapping the third pixel electrode, wherein the second color conversion layer is positioned between the first color conversion layer and the light-transmitting layer; and
a third color filter disposed between the surface of the base substrate and the light-transmitting layer and configured to transmit third light of the third color.

### Claim 16 (depends on 14)

The display device of claim 14, further comprising:
a liquid-crystal layer disposed between the display substrate and the color conversion substrate; and
a backlight unit configured to emit the first light of the third color, the second light of the third color, and the third light of the third color, wherein the display substrate is positioned between the liquid-crystal layer and the backlight unit.

### Claim 17 (depends on 16)

The display device of claim 16, further comprising:
a common electrode disposed between the color conversion substrate and the liquid-crystal layer; and
a polarizing layer disposed between the common electrode and the color conversion substrate.