# US 12,181,742 B2 · Display device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,181,742 B2
- Document ID: US12181742B2
- Status: Granted
- Kind: B2
- Application number: 18/277,980
- Filed: 2021-02-23
- Published: 2024-04-18
- Granted: 2024-12-31
- Earliest claimed: 2021-02-23
- Assignees: Hefei Boe Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd.
- Applicants: Hefei BOE Optoelectronics Technology Co., Ltd.; BOE Technology Group Co., Ltd.
- Inventors: Hu Li; Tingfei Wang; Liangliang Zheng; Hai Kang; Douqing Zhang; Zhao Dong; Xuemei Zhao
- Web page: https://patentgrep.com/patent/US12181742B2

## CPC

- G02F 1/133504: {Diffusing, scattering, diffracting elements (associated to illuminating devices G02F1/133606)}
- G02F 1/133606: {including a specially adapted diffusing, scattering or light controlling members}
- G02F 1/1335: Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F 1/1336: {Illuminating devices}
- G02F 1/133331: {Cover glasses}
- 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

## Abstract

A display device, including a backlight module (1). The backlight module (1) includes an optical film layer (2), the optical film layer (2) includes at least two diffusers (21) stacked in sequence, and the haze of each diffuser (21) is 80%-99%. The backlight module (1) further includes an LED light source (3), and the optical band of the LED light source (3) is greater than 455 nm. The display device further includes a cover plate (5) and at least one anti-reflection layer (7), the cover plate (5) is provided with an atomization layer (51), and the anti-reflection layer (7) is located on the side of the cover plate (5) facing away from a display panel (4).

## Claims

### Claim 1

A display device, comprising a backlight module;
wherein the backlight module comprises an optical film layer,
the optical film layer comprises at least two diffusers stacked in sequence, and
a haze of each of the at least two diffusers ranges from 80% to 99%;
wherein the display device further comprises a display panel and a cover plate; wherein the cover plate is located at a side, facing away from the backlight module, of the display panel;
wherein the cover plate comprises an atomization layer; wherein the atomization layer is located at a light-emitting side of the cover plate, and a haze of the atomization layer ranges from 5% to 70%; wherein the atomization layer is formed through an etching process;
or, wherein the display device further comprises at least one anti-reflection layer; wherein the at least one anti-reflection layer is located at a side, facing away from the display panel, of the cover plate; a refractive index of each of the at least one anti-reflection layer falls between a refractive index of the cover plate and a refractive index of air; and in a case that the display device comprises two or more anti-reflection layers, refractive indexes of the two or more anti-reflection layers decrease sequentially in a direction away from the cover plate.

### Claim 2 (depends on 1)

The display device according to claim 1, wherein the optical film layer comprises three diffusers.

### Claim 3 (depends on 1)

The display device according to claim 1, wherein the haze of each of the at least two diffusers is 98%.

### Claim 4 (depends on 1)

The display device according to claim 1, wherein the backlight module further comprises a light emitting diode (LED) light source, and an optical band of the LED light source is greater than 455 nm.

### Claim 5 (depends on 4)

The display device according to claim 4, wherein the optical band of the LED light source is 460 nm.

### Claim 6 (depends on 1)

The display device according to claim 1, wherein each of corners of two ends of a bezel of a side, close to an integrated circuit chip, of each of the display panel and the backlight module is arranged as a chamfer.

### Claim 7 (depends on 6)

The display device according to claim 6, wherein the chamfers at the two ends of the display panel and the chamfers at the two ends of the backlight module are aligned; and
a chamfer amount of each of the chamfers at the two ends of each of the display panel and the backlight module ranges from 0.5 mm to 5 mm.

### Claim 8 (depends on 1)

The display device according to claim 1, wherein the haze of the atomization layer is 35%.

### Claim 9 (depends on 1)

The display device according to claim 1, comprising six anti-reflection layers.

### Claim 10 (depends on 1)

The display device according to claim 1, comprising one anti-reflection layer, wherein the refractive index of the anti-reflection layer is 1.25.