Phase difference element and display unit

Patent metadata

Field	Value
Publication number	US-9304322-B2
Application number	US-201113168008-A
Country	US
Kind code	B2
Filing date	Jun 24, 2011
Priority date	Jun 30, 2010
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

A phase difference element capable of decreasing deterioration of 3D characteristics and a display unit including the phase difference element are provided. The phase difference element includes a phase difference film, and an anti-glare film. The phase difference film has a phase difference layer composed of two or more phase difference regions each having different direction of a slow axis that are regularly arranged in a plane. Retardation of the anti-glare film is 20 nm or less and total haze of the anti-glare film is 30% or less.

First claim

The invention is claimed as follows:

1. A phase difference element comprising:
an anti-glare film;
an alignment film; and
a phase difference film provided between the anti-glare film and the alignment film,
wherein the phase difference film has a phase difference layer composed of two or more phase difference regions each having different direction of a slow axis that are regularly arranged in a plane,
wherein retardation of the anti-glare film is 20 nm or less and total haze of the anti-glare film is 30% or less,
wherein crosstalk of light transmitted through a first one the phase difference regions and crosstalk of light transmitted through a second one of the phase difference regions is 3.5% or less,
wherein the alignment film includes two or more alignment regions, each region having different alignment directions, and
wherein a first alignment region includes grooves extending in a first direction, and a second alignment region includes grooves extending in a second direction that is orthogonal to the first direction.

2. The phase difference element according to claim 1 , wherein the retardation of the anti-glare film is 10 nm or less and the total haze of the anti-glare film is 30% or less.

3. The phase difference element according to claim 2 , wherein the crosstalk of light transmitted through a first one the phase difference regions and the crosstalk of light transmitted through a second one of the phase difference regions is 2.5% or less.

4. A display unit comprising:
a display panel in which a plurality of pixels are arranged in a matrix state; and
a phase difference element attached to the display panel,
wherein the phase difference element includes an anti-glare film, an alignment film, and a phase difference film provided between the anti-glare film and the alignment film and arranged on the display panel side, the anti-glare film being arranged on the side opposite to the display panel with respect to the phase difference film,
the phase difference film has a phase difference layer composed of two or more phase difference regions each having different direction of a slow axis that are regularly arranged in a plane,
wherein retardation of the anti-glare film is 20 nm or less and total haze of the anti-glare film is 30% or less,
wherein crosstalk of light transmitted through a first one the phase difference regions and crosstalk of light transmitted through a second one of the phase difference regions is 3.5% or less,
wherein the alignment film includes two or more alignment regions, each region having different alignment directions, and
wherein a first alignment region includes grooves extending in a first direction, and a second alignment region includes grooves extending in a second direction that is orthogonal to the first direction.

5. The display unit according to claim 4 , wherein the retardation of the anti-glare film is 10 nm or less and the total haze of the anti-glare film is 30% or less.

6. The display unit according to claim 5 , wherein the crosstalk of light transmitted through a first one the phase difference regions and the crosstalk of light transmitted through a second one of the phase difference regions is 2.5% or less.

Assignees

• Inoue Junichi
• Hoshi Mitsunari
• Sony Corp

Inventors

• Inoue Junichi
• Hoshi Mitsunari

Classifications

• G02B5/3016

  involving passive liquid crystal elements (optical properties of liquid crystals G02F1/0063; polarising elements associated with active liquid crystal devices G02F1/133528) · CPC title

• G02B5/32

  Holograms used as optical elements · CPC title

• G02B5/0242

  by means of dispersed particles · CPC title

• G02B30/25 Primary

  using polarisation techniques · CPC title

• G02B5/0226 Primary

  having particles on the surface · CPC title