# US 11,906,839 B2 · Display device and electronic equipment

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- Number: US 11,906,839 B2
- Document ID: US11906839B2
- Status: Granted
- Kind: B2
- Application number: 16/981,602
- Filed: 2020-08-04
- Published: 2023-04-20
- Granted: 2024-02-20
- Earliest claimed: 2020-07-01
- Assignees: Huizhou China Star Optoelectronics Technology Co., Ltd.
- Applicants: Huizhou China Star Optoelectronics Technology Co., Ltd.
- Inventors: Bo Hai
- Web page: https://patentgrep.com/patent/US11906839B2

## CPC

- G02F 1/133531: {characterised by the arrangement of polariser or analyser axes}
- G02B 5/3083: {Birefringent or phase retarding elements (G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001)}
- G02F 1/133638: {Waveplates, i.e. plates with a retardation value of lambda/n}
- G02F 1/133635: {Multifunctional compensators}
- G02F 2202/28: Adhesive materials or arrangements
- G02F 2413/01: Number of plates being 1
- H10K 50/86: Arrangements for improving contrast, e.g. preventing reflection of ambient light
- 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
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

The present disclosure provides a display device and an electronic equipment. The display device includes: a display module, the display module having a light emitting side; a phase retarder, the phase retarder is disposed on the light emitting side of the display module; wherein a range of a compensation value of the phase retarder is [λ/16, λ/4), (λ/4, 7λ/16], [9λ/16, 3λ/4) or (3λ/4, 15λ/16], where λ is a wavelength of light emitted by the display module.

## Claims

### Claim 1

A display device, comprising:
a display module, the display module having a light emitting side;
a phase retarder, the phase retarder is disposed on the light emitting side of the display module; wherein,
a range of a compensation value of the phase retarder is [λ/16, λ/4), (λ/4, 7λ/16], [9λ/16, 3λ/4) or (3λ/4, 15λ/16], where λ is a wavelength of light emitted by the display module.

### Claim 2 (depends on 1)

The display device according to claim 1, wherein the range of the compensation value of the phase retarder is [λ1/16, λ1/4), (λ1/4, 7λ1/16], [9λ1/16, 3λ1/4), and (3λ1/4, 15λ1/16)];
the λ1 is a wavelength of light with the highest brightness from the light emitted by the display module.

### Claim 3 (depends on 1)

The display device according to claim 1, wherein a protective layer is disposed on a surface of the phase retarder away from the display module.

### Claim 4 (depends on 1)

The display device according to claim 1, wherein the phase retarder has a hardened surface, and the hardened surface is a surface of the phase retarder away from the display module.

### Claim 5 (depends on 1)

The display device according to claim 1, wherein the display device is a liquid crystal display device, and the display module includes:
a first polarizer;
a liquid crystal display panel, the liquid crystal display panel being disposed on the first polarizer;
a second polarizer, the second polarizer being disposed on the liquid crystal display panel;
a backlight module, the backlight module being disposed on the second polarizer;
wherein,
the phase retarder is disposed on a side of the first polarizer away from the liquid crystal display panel.

### Claim 6 (depends on 5)

The display device according to claim 5, wherein the display device further includes an adhesive layer, and the phase retarder is attached to a surface of the first polarizer away from the liquid crystal display panel by the adhesive layer.

### Claim 7 (depends on 5)

The display device according to claim 5, wherein an included angle between a slow axis of the phase retarder and a transmission axis of the first polarizer is 45 degrees or 135 degrees.

### Claim 8 (depends on 7)

The display device according to claim 7, wherein an included angle between the transmission axis of the first polarizer and a horizontal center line of the liquid crystal display panel is 45 degrees or 135 degrees; an included angle between the phase retarder and the horizontal center line of the liquid crystal display panel is 90 degrees or 180 degrees.

### Claim 9 (depends on 7)

The display device according to claim 7, wherein an included angle between the transmission axis of the first polarizer and a horizontal center line of the liquid crystal display panel is 0 degrees or 90 degrees; an included angle between the phase retarder and the horizontal center line of the liquid crystal display panel is 45 degrees or 135 degrees.

### Claim 10 (depends on 1)

The display device according to claim 1, wherein the display module includes:
an OLED display panel;
a third polarizer, the third polarizer being disposed on the OLED display panel;
wherein,
the phase retarder is disposed on a side of the third polarizer away from the OLED display panel.

### Claim 11 (depends on 1)

The display device according to claim 1, wherein the phase retarder is a wave plate or a birefringent film.

### Claim 12

An electronic equipment, comprising a display device, the display device comprising:
a display module, the display module having a light emitting side;
a phase retarder, the phase retarder is disposed on the light emitting side of the display module; wherein,
a range of a compensation value of the phase retarder is [λ/16, λ/4), (λ/4, 7λ/16], [9λ/16, 3λ/4) or (3λ/4, 15λ/16], where λ is a wavelength of light emitted by the display module.

### Claim 13 (depends on 12)

The electronic equipment according to claim 12, the range of the compensation value of the phase retarder is [λ1/16, λ1/4), (λ1/4, 7λ1/16], [9λ1/16, 3λ1/4), and (3λ1/4, 15λ1/16)];
the λ1 is a wavelength of light with the highest brightness from the light emitted by the display module.

### Claim 14 (depends on 12)

The electronic equipment according to claim 12, wherein the phase retarder has a hardened surface, and the hardened surface is a surface of the phase retarder away from the display module.

### Claim 15 (depends on 12)

The electronic equipment according to claim 12, wherein the display device is a liquid crystal display device, and the display module includes:
a first polarizer;
a liquid crystal display panel, the liquid crystal display panel being disposed on the first polarizer;
a second polarizer, the second polarizer being disposed on the liquid crystal display panel;
a backlight module, the backlight module being disposed on the second polarizer;
wherein,
the phase retarder is disposed on a side of the first polarizer away from the liquid crystal display panel.

### Claim 16 (depends on 15)

The electronic equipment according to claim 15, wherein the display device further includes an adhesive layer, and the phase retarder is attached to a surface of the first polarizer away from the liquid crystal display panel by the adhesive layer.

### Claim 17 (depends on 15)

The electronic equipment according to claim 15, wherein an included angle between a slow axis of the phase retarder and a transmission axis of the first polarizer is 45 degrees or 135 degrees.

### Claim 18 (depends on 17)

The electronic equipment according to claim 17, wherein an included angle between the transmission axis of the first polarizer and a horizontal center line of the liquid crystal display panel is 45 degrees or 135 degrees; an included angle between the phase retarder and the horizontal center line of the liquid crystal display panel is 90 degrees or 180 degrees.

### Claim 19 (depends on 17)

The electronic equipment according to claim 17, wherein an included angle between the transmission axis of the first polarizer and a horizontal center line of the liquid crystal display panel is 0 degrees or 90 degrees; an included angle between the phase retarder and the horizontal center line of the liquid crystal display panel is 45 degrees or 135 degrees.

### Claim 20 (depends on 12)

The electronic equipment according to claim 12, wherein the display module includes:
an OLED display panel;
a third polarizer, the third polarizer being disposed on the OLED display panel;
wherein,
the phase retarder is disposed on a side of the third polarizer away from the OLED display panel.