# US 12,004,370 B2 · Display panels, and display screens

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- Number: US 12,004,370 B2
- Document ID: US12004370B2
- Status: Granted
- Kind: B2
- Application number: 17/151,693
- Filed: 2021-01-19
- Published: 2021-06-24
- Granted: 2024-06-04
- Earliest claimed: 2018-12-14
- Assignees: KunShan Go-Visionox Opto-Electronics Co., Ltd
- Applicants: Kunshan Go-Visionox Opto-Electronics Co., Ltd.
- Inventors: Lixiong Xu
- Web page: https://patentgrep.com/patent/US12004370B2

## CPC

- H10K 59/8792: {comprising light absorbing layers, e.g. black layers}
- H10K 59/122: Pixel-defining structures or layers, e.g. banks
- H10K 59/176: comprising two independent displays, e.g. for emitting information from two major sides of the display
- H10K 59/60: OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
- H10K 59/878: {comprising reflective means}
- H10K 59/8791: {Arrangements for improving contrast, e.g. preventing reflection of ambient light}
- H10K 59/131: Interconnections, e.g. wiring lines or terminals
- H10K 59/179: Interconnections, e.g. wiring lines or terminals
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

The present application relates to a display panel, a display screen and a display terminal, wherein the display panel comprises a substrate, having a first surface for an external light entering therein and a second surface for an external light exiting therefrom; and at least one diffractive relief structure, provided on the second surface of the substrate and used for reducing or eliminating a diffractive light formed on the second surface by the external light passing through the substrate. The diffractive relief structure is arranged on the second surface of the display panel, and can be used to effectively eliminate the positive and negative order diffractive light formed on the second surface of the substrate by the external light entering the first surface of the substrate and exiting from the second surface.

## Claims

### Claim 1

A display panel, comprising:
a substrate, having a first surface for external light entering the display panel and a second surface for the external light exiting from the display panel; and
at least one diffractive relief structure, provided on the second surface of the substrate and used for reducing or eliminating a diffractive light transformed from the external light when the external light passes through the second surface of the substrate;
wherein the diffractive relief structure has a plurality of grooves, and an inner wall of each of the plurality of grooves has a curved surface, and a curved line of a longitudinal section of the curved surface comprises a plurality of curved lines connected with each other and having different curvature radii.

### Claim 2 (depends on 1)

The display panel according to claim 1, wherein
the diffractive relief structure is an absorption layer or a reflection layer.

### Claim 3 (depends on 1)

The display panel according to claim 1, wherein
the diffractive relief structure comprises an absorption layer and a reflection layer, and
the reflection layer is arranged on the absorption layer.

### Claim 4 (depends on 3)

The display panel according to claim 3, wherein
the absorption layer is made of a material having a light absorption rate greater than 70%, and/or
the reflection layer is made of a material having a light reflectivity rate greater than 90%.

### Claim 5 (depends on 1)

The display panel according to claim 1, wherein
a curvature radius of each curved line of the plurality of curved lines connected with each other and having different curvature radii is mainly determined by a diffraction order, a wavelength and an incident direction of the diffractive light.

### Claim 6 (depends on 1)

The display panel according to claim 1, wherein
a curvature radius of the plurality of curved lines connected with each other and having different curvature radii is determined by the following formula:
d
=
k
⁢
λ
2
⁢
sin
⁢
⁢
θ
,
wherein, k represents a diffraction order, λ represents a wavelength of the diffractive light, θ represents a diffraction angle of the diffractive light with k order, d represents a distance from a diffractive surface to a receiving surface, and
the curvature radii of the plurality of curved lines connected with each other and having different curvature radii decrease gradually in a direction from a center of each of the plurality of grooves towards an opening edge of each of the plurality of grooves.

### Claim 7 (depends on 1)

The display panel of claim 1, wherein
the first surface of the substrate is provided with a pixel array, and
the plurality of grooves have a one-to-one correspondence with sub-pixels in the pixel array, and
a width of an opening of each groove is greater than a width of each sub-pixel.

### Claim 8 (depends on 1)

The display panel of claim 1, wherein
the plurality of grooves are connected by a first connecting portion.

### Claim 9 (depends on 8)

The display panel of claim 8, wherein
the first connecting portion has a thickness no more than 10 μm.

### Claim 10 (depends on 1)

The display panel of claim 1, wherein
a material of the second surface of the substrate is exposed at bottoms of the plurality of grooves.