# US 10,481,435 B2 · Horizontal alignment-type liquid crystal display device

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- Number: US 10,481,435 B2
- Document ID: US10481435B2
- Status: Granted
- Kind: B2
- Application number: 15/822,610
- Filed: 2017-11-27
- Published: 2018-03-22
- Granted: 2019-11-19
- Earliest claimed: 2015-05-28
- Assignees: FUJIFILM Corporation
- Applicants: FUJIFILM Corporation
- Inventors: Makoto Kamo
- Web page: https://patentgrep.com/patent/US10481435B2

## CPC

- G02F 1/13363: Birefringent elements, e.g. for optical compensation
- G02B 5/30: Polarising elements (light-modulating devices with active elements G02F1/00)
- G02F 1/133305: {Flexible substrates, e.g. plastics, organic film}
- G02F 1/133528: {Polarisers}
- G02F 1/133634: {the refractive index Nz perpendicular to the element surface being different from in-plane refractive indices Nx and Ny, e.g. biaxial or with normal optical axis}
- G02F 1/133562: {on the viewer side}
- G02F 1/133567: {on the back side}
- G02F 1/133738: {for homogeneous alignment}
- G02F 2201/501: Blocking layers, e.g. against migration of ions
- G02F 2413/02: Number of plates being 2
- G02F 2413/06: Two plates on one side of the LC cell
- 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

## Abstract

The present invention provides a horizontal alignment-type liquid crystal display device including a viewing-side polarizing plate; a liquid crystal cell; a backlight-side polarizing plate; and a backlight, in this order, the liquid crystal cell includes a liquid crystal layer held between two substrates, at least any one of the substrates is a resin substrate, the polarizing plate provided on the resin substrate side includes a gas barrier film including a phase difference layer and an inorganic layer, and a polarizer, and the gas barrier film is on the resin substrate side with respect to the polarizer. In the horizontal alignment-type liquid crystal display device according to the present invention, thinning based on the use of the resin substrate is effectively realized, and a liquid crystal cell can be sealed.

## Claims

### Claim 1

A horizontal alignment-type liquid crystal display device in an in-plane switching mode comprising:
a viewing-side polarizing plate;
a liquid crystal cell;
a backlight-side polarizing plate; and
a backlight, in this order,
wherein the liquid crystal cell includes a liquid crystal layer held between two substrates,
wherein at least any one of the substrates is a polyimide resin substrate,
wherein at least one of the viewing-side polarizing plate or the backlight-side polarizing plate provided on the polyimide resin substrate side includes a gas barrier film including a phase difference layer and an inorganic layer, and a polarizer,
wherein the gas barrier film is on the polyimide resin substrate side with respect to the polarizer,
wherein retardation of the polyimide resin substrate in a thickness direction at a wavelength 550 nm is 50 nm or greater,
wherein in-plane retardation of the polyimide resin substrate at a wavelength of 550 nm is −10 nm to 10 nm,
wherein the polyimide resin substrate is on the viewing-side polarizing plate side with respect to the liquid crystal layer,
wherein a first phase difference layer satisfying nx>nz>ny is included as the phase difference layer,
wherein a second phase difference layer satisfying nz>nx=ny is further included as the phase difference layer, and
wherein a slow axis of the first phase difference phase is orthogonal to the absorption axis of the polarizer.

### Claim 2 (depends on 1)

The horizontal alignment-type liquid crystal display device in an in-plane switching mode according to claim 1,
wherein a substrate on the backlight-side polarizing plate side with respect to the liquid crystal layer is a glass substrate.

### Claim 3 (depends on 1)

The horizontal alignment-type liquid crystal display device in an in-plane switching mode according to claim 1,
wherein retardation of the polyimide resin substrate in a thickness direction at a wavelength of 550 nm is 70 nm or greater.

### Claim 4 (depends on 1)

The horizontal alignment-type liquid crystal display device in an in-plane switching mode according to claim 1,
wherein an inside haze of the phase difference layer is 0.01% to 0.2%.

### Claim 5 (depends on 1)

The horizontal alignment-type liquid crystal display device in an in-plane switching mode according to claim 1,
wherein the inorganic layer includes at least one inorganic compound selected from the group consisting of silicon nitride, silicon oxide, silicon oxynitride, and aluminum oxide.

### Claim 6

A horizontal alignment-type liquid crystal display device in an in-plane switching mode comprising:
a viewing-side polarizing plate;
a liquid crystal cell;
a backlight-side polarizing plate; and
a backlight, in this order,
wherein the liquid crystal cell includes a liquid crystal layer held between two substrates,
wherein at least any one of the substrates is a polyimide resin substrate,
wherein at least one of the viewing-side polarizing plate or the backlight-side polarizing plate provided on the polyimide resin substrate side includes a gas barrier film including a phase difference layer and an inorganic layer, and a polarizer,
wherein the gas barrier film is on the polyimide resin substrate side with respect to the polarizer,
wherein retardation of the polyimide resin substrate in a thickness direction at a wavelength 550 nm is 50 nm or greater,
wherein in-plane retardation of the polyimide resin substrate at a wavelength of 550 nm is −10 nm to 10 nm,
wherein a first phase difference layer satisfying nz≥nx>ny is included as the phase difference layer,
wherein a slow axis of the first phase difference layer is parallel to an absorption axis of the polarizer, and
wherein a second phase difference layer satisfying any one of nz>nx=ny or nx=ny>nz is further included as the phase difference layer.

### Claim 7

A horizontal alignment-type liquid crystal display device in an in-plane switching mode comprising:
a viewing-side polarizing plate;
a liquid crystal cell;
a backlight-side polarizing plate; and
a backlight, in this order,
wherein the liquid crystal cell includes a liquid crystal layer held between two substrates,
wherein at least any one of the substrates is a polyimide resin substrate,
wherein at least one of the viewing-side polarizing plate or the backlight-side polarizing plate provided on the polyimide resin substrate side includes a gas barrier film including a phase difference layer and an inorganic layer, and a polarizer,
wherein the gas barrier film is on the polyimide resin substrate side with respect to the polarizer,
wherein retardation of the polyimide resin substrate in a thickness direction at a wavelength 550 nm is 50 nm or greater,
wherein in-plane retardation of the polyimide resin substrate at a wavelength of 550 nm is −10 nm to 10 nm,
wherein the polyimide resin substrate is on the viewing-side polarizing plate side with respect to the liquid crystal layer,
wherein a first phase difference layer satisfying nz≥nx>ny is included as the phase difference layer,
wherein a slow axis of the first phase difference layer is parallel to an absorption axis of the polarizer, and
wherein a second phase difference layer satisfying any one of nz>nx=ny or nx=ny>nz is further included as the phase difference layer.