# US 12,604,644 B2 · Display panel and display device

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- Number: US 12,604,644 B2
- Document ID: US12604644B2
- Status: Granted
- Kind: B2
- Application number: 18/039,267
- Filed: 2022-06-30
- Published: 2024-12-26
- Granted: 2026-04-14
- Earliest claimed: 2022-06-30
- Assignees: Chengdu Boe Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd.
- Applicants: Chengdu BOE Optoelectronics Technology Co., Ltd.; BOE Technology Group Co., Ltd.
- Inventors: Ming Hu; Bo Shi; Du Chen; Taofeng Xie; Qixiao Wu
- Web page: https://patentgrep.com/patent/US12604644B2

## CPC

- H10K 59/879: {comprising refractive means, e.g. lenses}
- H10K 50/80: Constructional details
- H10K 50/81: Anodes
- H10K 59/00: Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K 59/122: Pixel-defining structures or layers, e.g. banks
- H10K 59/878: {comprising reflective means}
- H10K 59/38: comprising colour filters or colour changing media [CCM]
- H10K 59/8792: {comprising light absorbing layers, e.g. black layers}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A display panel includes a substrate, a light emitting layer, a packaging layer, a plurality of lens elements and a transparent layer. The transparent layer is disposed on the side of the packaging layer away from the light emitting layer, at least a portion of the transparent layer is disposed between adjacent lens elements, and a projection of the transparent layer on the substrate overlaps at least partially with a projection of the light emitting unit on the substrate. The lens element has a side surface in contact with the transparent layer, and a refractive index of the lens element at the side surface is smaller than a refractive index of the transparent layer.

## Claims

### Claim 1

A display panel comprising:
a substrate;
a light emitting layer on a side of the substrate, comprising a plurality of light emitting units spaced apart, with a pixel definition layer among the light emitting units;
a packaging layer on a side of the light emitting layer away from the substrate;
lens elements on a side of the packaging layer away from the light emitting layer, wherein a projection of a lens element of the lens elements on the substrate overlaps at least partially with a projection of the pixel definition layer on the substrate, the lens element comprises a first lens and a second lens stacked in layers, the first lens is adjacent to the packaging layer, and the second lens is on a side of the first lens away from the packaging layer;
a transparent layer on the side of the packaging layer away from the light emitting layer, wherein at least a portion of the transparent layer is between the lens elements, and a projection of the transparent layer on the substrate overlaps at least partially with a projection of a light emitting unit of the light emitting units on the substrate; wherein the transparent layer directly contacts sidewalls of both of the first lens and the second lens;
wherein the lens element has a side surface in contact with the transparent layer, and a refractive index of the lens element at the side surface is smaller than a refractive index of the transparent layer.

### Claim 2 (depends on 1)

The display panel of claim 1, further comprising a first reflective layer on a surface of the lens element adjacent to the packaging layer, a second reflective layer on a surface of the lens element away from the packaging layer, and wherein the first reflective layer and the second reflective layer are face to face.

### Claim 3 (depends on 2)

The display panel of claim 2, further comprising a protrusion between the lens element and the packaging layer, wherein the protrusion has a bottom surface adjacent to the packaging layer and a top surface adjacent to the lens element, the top surface is convex towards the lens element, and the first reflective layer is disposed on the top surface.

### Claim 4 (depends on 3)

The display panel of claim 3, wherein the protrusion comprises a photosensitive material.

### Claim 5 (depends on 3)

The display panel of claim 3, wherein the first reflective layer is in a polyline or an arc shape, and a distance between the first reflective layer and the packaging layer decreases from a center to an edge.

### Claim 6 (depends on 2)

The display panel of claim 2, wherein the first reflective layer and/or the second reflective layer each comprise silver.

### Claim 7 (depends on 2)

The display panel of claim 2, further comprising a black matrix block on a side of the lens element away from the packaging layer, wherein a projection of the black matrix block on the substrate overlaps at least partially with a projection of the lens element on the substrate;
wherein the black matrix block has a lower surface adjacent to the lens element and an upper surface away from the lens element, and the second reflection layer is in contact with the lower surface.

### Claim 8 (depends on 7)

The display panel of claim 7, wherein the second reflective layer is in a polyline or an arc shape, and a distance between the second reflective layer and the packaging layer increases from a center to an edge.

### Claim 9 (depends on 2)

The display panel of claim 2, wherein a slope angle between the side surface and the packaging layer is larger than or equal to 45 degrees and smaller than 90 degrees.

### Claim 10 (depends on 2)

The display panel of claim 2, wherein a refractive index of the transparent layer is 1.65 to 1.7, and a refractive index of the lens element is 1.45 to 1.5.

### Claim 11 (depends on 2)

The display panel of claim 2, wherein the transparent layer is a flattened layer filled between adjacent lens elements;
wherein the display panel further comprises a filter layer on a side of the transparent layer and the lens element away from the packaging layer.

### Claim 12 (depends on 11)

The display panel of claim 11, wherein a portion of the filter layer is filled between the lens elements as the transparent layer, and another portion of the filter layer is on a side of the transparent layer and the lens element away from the packaging layer.

### Claim 13 (depends on 12)

The display panel of claim 12, wherein the filter layer comprises a red filter layer, a green filter layer, and a blue filter layer;
the side surface of the lens element is in contact with the filter layer, and a slope angle between the side surface and the packaging layer is larger than or equal to 45 degrees but smaller than 90 degrees;
slope angles formed by different side surfaces in contact with different color filter layers are not equal to one another.

### Claim 14 (depends on 13)

The display panel of claim 13, wherein a slope angle formed by the side surface in contact with the red filter layer is larger than or equal to 65 degrees and smaller than or equal to 70 degrees;
a slope angle formed by the side surface in contact with the green filter layer is larger than or equal to 55 degrees and smaller than or equal to 60 degrees;
a slope angle of the side surface in contact with the blue filter layer is larger than or equal to 45 degrees and smaller than or equal to 50 degrees.

### Claim 15 (depends on 2)

The display panel of claim 2, wherein a material of the first lens is the same as that of the second lens, and a contact surface between the first lens and the second lens is a plane.

### Claim 16 (depends on 2)

The display panel of claim 2, wherein a width of the lens element decreases in a direction away from the packaging layer.

### Claim 17 (depends on 1)

The display panel of claim 1, wherein a surface of the second lens away from the first lens is a light output surface that allows light to pass through.

### Claim 18 (depends on 17)

The display panel of claim 17, wherein the light output surface of the second lens is in a polyline or an arc shape; and wherein from a center of the light output surface to an edge of the light output surface, a distance between the light output surface and the packaging layer increases or decreases.

### Claim 19 (depends on 17)

The display panel of claim 17, wherein the lens element further comprises a third lens on a side of the second lens or the first lens away from the packaging layer, and wherein a refractive index of the third lens is larger than that of the first lens or the second lens.

### Claim 20 (depends on 1)

A display device comprising a display panel of claim 1.