# US 2021/0242433 A1 · Display panel and display device

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- Number: US 2021/0242433 A1
- Document ID: US20210242433A1
- Status: Published application
- Kind: A1
- Application number: 17/237,158
- Filed: 2021-04-22
- Published: 2021-08-05
- Earliest claimed: 2020-12-29
- Assignees: Hubei Yangtze Industrial Innovation Center Of Advanced Display Co., Ltd.
- Applicants: Hubei Yangtze Industrial Innovation Center of Advanced Display Co., Ltd
- Inventors: Ai XIAO
- Web page: https://patentgrep.com/patent/US20210242433A1

## CPC

- H10K 59/38: comprising colour filters or colour changing media [CCM]
- H10K 59/877: {comprising scattering means}
- H10K 59/879: {comprising refractive means, e.g. lenses}
- H10K 59/8792: {comprising light absorbing layers, e.g. black layers}
- H10K 2102/351: {Thickness}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A display panel and a display device are provided. The display panel includes a light-emitting device layer located at a side of the substrate; and a color resist layer located at a side of the light-emitting device layer facing away from the substrate and including color resist units arranged in an array, each color resist unit including a first portion and a second portion; a projection of the second portion on the substrate is located at a projection of the first portion on the substrate, a projection of the first portion on the light-emitting device layer is located in a pixel aperture, and a thickness of the first portion of at least one of the color resist units in the first direction is larger than or equal to a thickness of the second portion in the first direction.

## Claims

### Claim 1

A display panel, comprising:
a substrate;
a light-emitting device layer located at a side of the substrate, wherein the light-emitting device layer comprises pixel apertures arranged in an array and light-emitting devices one-to-one corresponding to the pixel apertures, and each of the light-emitting devices is located in a respective one pixel aperture of the pixel apertures; and
a color resist layer located at a side of the light-emitting device layer facing away from the substrate, wherein the color resist layer comprises color resist units arranged in an array, each of the color resist units comprises a first portion and a second portion, a projection of the second portion on the substrate is located outside a projection of the first portion on the substrate, and a projection of the first portion on the light-emitting device layer is located in a respective one pixel aperture of the pixel apertures,
wherein a thickness of the first portion of at least one of the color resist units in a first direction is larger than or equal to a thickness of the second portion of the at least one of the color resist units in the first direction, where the first direction is a direction in which light exits from the display panel.

### Claim 2 (depends on 1)

The display panel according to claim 1, further comprising:
a light-shielding layer located at a side of the color resist layer close to the substrate, wherein a projection of the light-shielding layer on the light-emitting device layer is located between adjacent pixel apertures of the pixel apertures; and
an auxiliary layer located between the light-shielding layer and the color resist layer, wherein a projection of the auxiliary layer on the substrate covers a projection of at least one of the color resist units on the substrate.

### Claim 3 (depends on 2)

The display panel according to claim 2, wherein
the auxiliary layer comprises at least one first auxiliary unit;
the light-emitting devices comprises first-color light-emitting units, second-color light-emitting units, and third-color light-emitting units, a center wavelength of light emitted by each of the first-color light-emitting units is λ1, a center wavelength of light emitted by each of the second-color light-emitting units is λ2, and a center wavelength of light emitted by each of the third-color light-emitting units is λ3, where λ1>λ2>λ3;
the color resist units comprise first-color resist units, which one-to-one correspond to the first-color light-emitting units in the first direction; and
a projection of each of the at least one first auxiliary unit on the substrate covers a projection of a respective one of the first-color resist units on the substrate.

### Claim 4 (depends on 3)

The display panel according to claim 3, wherein
a first groove is formed at a surface of each of the at least one first auxiliary unit facing away from the substrate;
the light-shielding layer comprises first apertures arranged in an array, the first apertures one-to-one correspond to the pixel apertures, and a number of the first apertures is equal to a number of the pixel apertures; and
a projection of each first groove on the light-shielding layer overlaps with a projection of a respective one of the first-color resist units on the light-shielding layer.

### Claim 5 (depends on 4)

The display panel according to claim 4, wherein the projection of the first groove on the light-shielding layer at least covers a respective one first aperture of the first apertures.

### Claim 6 (depends on 3)

The display panel according to claim 3, wherein a maximum thickness of each of the at least one first auxiliary unit in a direction perpendicular to the substrate is larger than or equal to a thickness of the light-shielding layer in the direction perpendicular to the substrate.

### Claim 7 (depends on 3)

The display panel according to claim 3, wherein a refractive index of each of the at least one first auxiliary unit is smaller than a refractive index of each of the first-color resist units.

### Claim 8 (depends on 3)

The display panel according to claim 3, wherein
a surface of each of the at least one first auxiliary unit facing the color resist layer comprises a first region and a second region, wherein along the first direction, the first region corresponds to the first portion of a respective one of the at least one first-color resist unit, and the second region corresponds to the second portion of the respective one of the at least one first-color resist unit; and the first region has greater hydrophilicity than the second region.

### Claim 9 (depends on 3)

The display panel according to claim 3, wherein each of the at least one first auxiliary unit is doped with scattering particles inside.

### Claim 10 (depends on 1)

The display panel according to claim 1, wherein the projection of the auxiliary layer on the substrate completely covers a projection of the color resist layer on the substrate.

### Claim 11 (depends on 10)

The display panel according to claim 10, wherein
first grooves are formed at a surface of the auxiliary layer facing away from the substrate;
the light-emitting devices comprises first-color light-emitting units, second-color light-emitting units, and third-color light-emitting units, a center wavelength of light emitted by the first-color light-emitting unit is λ1, a center wavelength of light emitted by the second-color light-emitting unit is λ2, and a center wavelength of light emitted by the third-color light-emitting unit is λ3, where λ1>λ2>λ3;
the color resist units comprise first-color resist units, which one-to-one correspond to the first-color light-emitting units in the first direction;
the light-shielding layer comprises first apertures arranged in an array, the first apertures one-to-one correspond to the pixel apertures, and a number of the first apertures is equal to a number of the pixel apertures; and
a projection of each of the first grooves on the light-shielding layer overlaps with a projection of a respective one of the first-color resist units on the light-shielding layer.

### Claim 12 (depends on 11)

The display panel according to claim 11, wherein the projection of the each of the first grooves on the light-shielding layer at least covers a respective one of the first apertures.

### Claim 13 (depends on 11)

The display panel according to claim 11, wherein
second grooves and third grooves are further formed at the surface of the auxiliary layer facing away from the substrate;
the color resist units further comprise second-color resist units and third-color resist units, wherein along the first direction, the second-color resist units one-to-one correspond to the second-color light-emitting units, and the third-color resist units one-to-one correspond to the third-color light-emitting units;
a projection of each of the second grooves on the light-shielding layer overlaps with a projection of a respective one of the second-color resist units on the light-shielding layer; and
a projection of each of the third grooves on the light-shielding layer overlaps with a projection of a respective one of the third-color resist units on the light-shielding layer; and
in a direction perpendicular to the substrate, a depth h1 of each of the first grooves is larger than a depth h2 of each of the second grooves, or the depth h1 of each of the first grooves is larger than a depth h3 of each of the third grooves.

### Claim 14 (depends on 10)

The display panel according to claim 10, wherein a maximum thickness of the auxiliary layer in a direction perpendicular to the substrate is larger than or equal to a thickness of the light-shielding layer in the direction perpendicular to the substrate.

### Claim 15 (depends on 10)

The display panel according to claim 10, wherein a refractive index of the auxiliary layer is smaller than a refractive index of the color resist layer.

### Claim 16 (depends on 10)

The display panel according to claim 10, wherein
the light-emitting devices comprise first-color light-emitting units, second-color light-emitting units, and third-color light-emitting units, a center wavelength of light emitted by each of the first-color light-emitting units is λ1, a center wavelength of light emitted by each of the second-color light-emitting units is λ2, and a center wavelength of light emitted by each of the third-color light-emitting units is λ3, where λ1>λ2>λ3;
the color resist units comprise first-color resist units, which one-to-one correspond to the first-color light-emitting units in the first direction;
a surface of the auxiliary layer facing the substrate comprises a first region and a second region, the second region is located outside of the first region, and along the first direction, the first region corresponds to the first portion of a respective one of the color resist units; and
the first region has greater hydrophilicity than the second region.

### Claim 17 (depends on 10)

The display panel according to claim 10, wherein the auxiliary layer is doped with scattering particles inside, and projections of the scattering particles on the substrate overlap with projections of the first-color resist units on the substrate.

### Claim 18 (depends on 10)

The display panel according to claim 10, wherein
fourth grooves are formed at a surface of the auxiliary layer facing away from the substrate; and
a projection of the light-shielding layer on the auxiliary layer covers the fourth grooves.

### Claim 19 (depends on 18)

The display panel according to claim 18, wherein
fifth grooves are formed at a surface of the light-shielding layer facing away from the substrate; and
in a direction perpendicular to the substrate, each of the fifth grooves overlaps with at least a part of a respective one of the fourth grooves.

### Claim 20

A display device, comprising a display panel, wherein the display panel comprises:
a substrate;
a light-emitting device layer located at a side of the substrate, wherein the light-emitting device layer comprises pixel apertures arranged in an array and light-emitting devices one-to-one corresponding to the pixel apertures, and each of the light-emitting devices is located in a respective one pixel aperture of the pixel apertures; and
a color resist layer located at a side of the light-emitting device layer facing away from the substrate, wherein the color resist layer comprises color resist units arranged in an array, each of the color resist units comprises a first portion and a second portion, a projection of the second portion on the substrate is located outside a projection of the first portion on the substrate, and a projection of the first portion on the light-emitting device layer is located in a respective one pixel aperture of the pixel apertures,
wherein a thickness of the first portion of at least one of the color resist units in a first direction is larger than or equal to a thickness of the second portion of the at least one of the color resist units in the first direction, where the first direction is a direction in which light exits from the display panel.