# US 10,120,231 B2 · Liquid crystal display

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- Number: US 10,120,231 B2
- Document ID: US10120231B2
- Status: Granted
- Kind: B2
- Application number: 15/393,701
- Filed: 2016-12-29
- Published: 2018-07-05
- Granted: 2018-11-06
- Earliest claimed: 2016-12-29
- Assignees: LG Display Co., Ltd.
- Applicants: LG Display Co., Ltd.
- Inventors: Sangdae Han; Sejeon Park; Gunwoo Lee
- Web page: https://patentgrep.com/patent/US10120231B2

## CPC

- G02F 1/133504: {Diffusing, scattering, diffracting elements (associated to illuminating devices G02F1/133606)}
- G02F 1/133528: {Polarisers}
- G02F 2202/28: Adhesive materials or arrangements
- 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 liquid crystal display (LCD) is disclosed. The liquid crystal display (LCD) comprises an LCD panel, an upper polarization plate over the LCD panel, a lower polarization plate under the LCD panel, an adhesive layer under the lower polarization plate, a diffusion sheet under the adhesive layer, and an irregular air layer between at least part of the adhesive layer and the diffusion sheet.

## Claims

### Claim 1

A liquid crystal display (LCD), comprising:
an LCD panel;
an upper polarization plate over the LCD panel;
a lower polarization plate adhered under the LCD panel;
an adhesive layer under the lower polarization plate;
a diffusion sheet under the adhesive layer; and
an irregular air layer between at least part of the adhesive layer and the diffusion sheet,
wherein the LCD panel, the lower polarization, the adhesive layer, and the diffusion sheet are integrated by laminating the diffusion sheet to a bottom surface of the lower polarization plate through the adhesive layer,
wherein the diffusion sheet includes a base sheet, and a resin layer on the base sheet and configured to have a plurality of engraved patterns, and
wherein the length of an interface between the corresponding engraved pattern and the adhesive layer is smaller than a maximum length of the corresponding engraved pattern.

### Claim 2 (depends on 1)

The LCD of claim 1, wherein each of the plurality of engraved patterns has a globular shape having an upper part cut at an interface with the adhesive layer.

### Claim 3 (depends on 1)

The LCD of claim 1, wherein the air layer is placed within the engraved pattern by an adhesion of the resin layer and the adhesive layer.

### Claim 4 (depends on 1)

The LCD of claim 1, wherein at least one of the plurality of engraved patterns has a length of 1 to 30 μm.

### Claim 5 (depends on 1)

The LCD of claim 1, wherein a difference between lengths of contiguous engraved patterns of the plurality of engraved patterns is at least 1 μm.

### Claim 6 (depends on 1)

The LCD of claim 1, wherein the lower polarization plate comprises at least one polarizer.

### Claim 7 (depends on 6)

The LCD of claim 6, wherein the lower polarization plate further comprises a protection layer under or over the polarizer.

### Claim 8 (depends on 1)

The LCD of claim 1, wherein a top surface of the resin layer contacting the adhesive layer is flat.