# US 10,374,185 B2 · OLED display device having white OLEDs emitting white light to excite quantum dots

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- Number: US 10,374,185 B2
- Document ID: US10374185B2
- Status: Granted
- Kind: B2
- Application number: 16/122,886
- Filed: 2018-09-06
- Published: 2018-12-20
- Granted: 2019-08-06
- Earliest claimed: 2016-06-01
- Assignees: Shenzhen China Star Optoelectronics Technology Co., Ltd.
- Applicants: Shenzhen China Star Optoelectronics Technology Co., Ltd.
- Inventors: Lixuan Chen
- Web page: https://patentgrep.com/patent/US10374185B2

## CPC

- H10K 59/38: comprising colour filters or colour changing media [CCM]
- H10K 50/115: comprising active inorganic nanostructures, e.g. luminescent quantum dots
- H10K 59/8731: {multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers}
- H10K 2102/331: {Nanoparticles used in non-emissive layers, e.g. in packaging layer}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

An OLED display device includes a substrate, an OLED layer located on the substrate, and a quantum dot package layer covering the OLED layer. The quantum dot package layer includes a quantum dot material. Blue light or white light emitting from the OLED layer excites the quantum dot material of the quantum dot package layer to emit light for color displaying with high color gamut.

## Claims

### Claim 1

An Organic Light Emitting Diode (OLED) display device, comprising a substrate, an OLED layer located on the substrate, a quantum dot package layer located on the substrate and the OLED layer and covering the OLED layer, and a color filter located on the quantum dot package layer;
wherein the OLED layer comprises a plurality of white light OLEDs, which are arranged in an array;
the quantum dot package layer comprises a quantum dot material, which is distributed in a region of the quantum dot package layer located above and corresponding to the OLED layer; and
the white light OLEDs emit white light from tops thereof to excite the quantum dot material in the quantum dot package layer to emit light; and
wherein the OLED layer located on the substrate has surfaces exposed outside the substrate and the quantum dot package layer covers the surfaces of the OLED layer that are exposed outside the substrate so that the OLED layer is enclosed between the quantum dot package layer and the substrate.

### Claim 2 (depends on 1)

The OLED display device according to claim 1, wherein the substrate is a thin film transistor (TFT) array substrate.

### Claim 3 (depends on 1)

The OLED display device according to claim 1, wherein the quantum dot package layer comprises a plurality of organic layers and inorganic layers, which alternately stack up; and the quantum dot material is uniformly distributed in a region of at least one of the plurality of organic layers to form units including quantum dots; and
wherein the OLED display device is a flexible display device and further comprises a barrier film located on the color filter.

### Claim 4 (depends on 1)

The OLED display device according to claim 1, wherein the quantum dot package layer comprises an organic insulation layer; and the quantum dot material is uniformly distributed in the organic insulation layer to form units including quantum dots; and
wherein the OLED display device further comprises a package glue material located on the color filter, and a packager cover plate located on the package glue material.

### Claim 5 (depends on 4)

The OLED display device according to claim 4, wherein the units including quantum dots in the quantum dot package layer are manufactured and formed through ink-jet printing.