# US 10,768,470 B2 · Color conversion panel and display device including the same

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- Number: US 10,768,470 B2
- Document ID: US10768470B2
- Status: Granted
- Kind: B2
- Application number: 16/185,385
- Filed: 2018-11-09
- Published: 2019-10-03
- Granted: 2020-09-08
- Earliest claimed: 2018-03-29
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Kyoungwon Park; Soodong Kim; Minki Nam; Sungwoon Kim
- Web page: https://patentgrep.com/patent/US10768470B2

## CPC

- G02F 1/133514: {Colour filters}
- G02B 5/201: {in the form of arrays}
- G02F 1/133516: {Methods for their manufacture, e.g. printing, electro-deposition or photolithography}
- G02F 1/133553: {Reflecting elements (associated to illuminating devices G02F1/133605)}
- G02F 2/02: Frequency-changing of light, e.g. by quantum counters
- H10K 59/38: comprising colour filters or colour changing media [CCM]
- 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
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A color conversion panel includes a color base substrate including a first transmissive area, a second transmissive area and a third transmissive area; a light blocking pattern on the color base substrate and defining the first transmissive area, the second transmissive area, and the third transmissive area; a first color filter in the first transmissive area and the second transmissive area; a first color conversion layer on the first color filter at the first transmissive area; a second color conversion layer on the first color filter in the second transmissive area; and a second color filter on the first transmissive area, the second transmissive area, and the third transmissive area. The first color conversion layer and the second color conversion layer are each between the first color filter and the second color filter.

## Claims

### Claim 1

A color conversion panel, comprising:
a color base substrate having a first transmissive area, a second transmissive area, and a third transmissive area;
a light blocking pattern on the color base substrate and defining the first transmissive area, the second transmissive area, and the third transmissive area;
a first color filter in the first transmissive area and the second transmissive area;
a first color conversion layer on the first color filter in the first transmissive area;
a second color conversion layer on the first color filter in the second transmissive area; and
a second color filter in the first transmissive area, the second transmissive area, and the third transmissive area,
wherein the first color conversion layer and the second color conversion layer are each between the first color filter and the second color filter.

### Claim 2 (depends on 1)

The color conversion panel as claimed in claim 1, wherein the first color filter includes a yellow dye and a gray dye.

### Claim 3 (depends on 1)

The color conversion panel as claimed in claim 1, wherein the second color filter is over an entire surface of the color base substrate.

### Claim 4 (depends on 1)

The color conversion panel as claimed in claim 1, wherein a height of the second color filter is different in the first transmissive area and the third transmissive area.

### Claim 5 (depends on 1)

The color conversion panel as claimed in claim 1, wherein the second color filter has substantially a same height in the first transmissive area, the second transmissive area, and the third transmissive area.

### Claim 6 (depends on 1)

The color conversion panel as claimed in claim 1, further comprising a transmissive layer on the second color filter.

### Claim 7 (depends on 6)

The color conversion panel as claimed in claim 6, wherein the transmissive layer includes a scattering element.

### Claim 8 (depends on 6)

The color conversion panel as claimed in claim 6, wherein a thickness of the transmissive layer is different in the first transmissive area, the second transmissive area, and the third transmissive area.

### Claim 9 (depends on 6)

The color conversion panel as claimed in claim 6, wherein the transmissive layer has substantially a same thickness in the first transmissive area, the second transmissive area, and the third transmissive area.

### Claim 10 (depends on 1)

The color conversion panel as claimed in claim 1, further comprising a yellow light absorbing layer on a surface of the color base substrate.

### Claim 11 (depends on 10)

The color conversion panel as claimed in claim 10, wherein the yellow light absorbing layer is between the color base substrate and the second color filter.

### Claim 12 (depends on 1)

The color conversion panel as claimed in claim 1, wherein:
the first color conversion layer includes red quantum dots or red quantum rods, and
the second color conversion layer includes green quantum dots or green quantum rods.

### Claim 13 (depends on 1)

The display device as claimed in claim 1, wherein a color of the first color filter is different from a color of the second color filter.

### Claim 14

A display device, comprising:
a display panel including a plurality of pixels; and
a color conversion panel having a first transmissive area, a second transmissive area, and a third transmissive area;
wherein the color conversion panel includes:
a color base substrate;
a light blocking pattern on the color base substrate and defining the first transmissive area, the second transmissive area, and the third transmissive area;
a first color filter in the first transmissive area and the second transmissive area;
a first color conversion layer on the first color filter in the first transmissive area;
a second color conversion layer on the first color filter in the second transmissive area; and
a second color filter in the first transmissive area, the second transmissive area, and the third transmissive area, wherein:
each pixel includes an organic light emitting element having a first electrode, an organic light emitting layer, and a second electrode, and is in one of the first to third transmissive areas,
the first color conversion layer and the second color conversion layer are each between the first color filter and the second color filter,
the first color conversion layer overlaps the first electrode, the organic light emitting layer, and the second electrode in the first transmissive area, and
the second color conversion layer overlaps the first electrode, the organic light emitting layer, and the second electrode in the second transmissive area.

### Claim 15 (depends on 14)

The display device as claimed in claim 14, wherein the first color filter includes a yellow dye and a gray dye.

### Claim 16 (depends on 14)

The display device as claimed in claim 14, wherein the second color filter is disposed over the entire surface of the color base substrate.

### Claim 17 (depends on 14)

The display device as claimed in claim 14, further comprising a transmissive layer on the second color filter.

### Claim 18 (depends on 17)

The display device as claimed in claim 17, wherein the transmissive layer includes a scattering element.

### Claim 19 (depends on 14)

The display device as claimed in claim 14, further comprising a yellow light absorbing layer on a surface of the color base substrate.

### Claim 20 (depends on 19)

The display device as claimed in claim 19, wherein the yellow light absorbing layer is between the color base substrate and the second color filter.

### Claim 21 (depends on 14)

The display device as claimed in claim 14, wherein:
the first color conversion layer includes red quantum dots or red quantum rods, and
the second color conversion layer includes green quantum dots or green quantum rods.