JP2016224364A5

JP2016224364A5 -

Info

Publication number: JP2016224364A5
Application number: JP2015113032A
Authority: JP
Filing date: 2015-06-03
Publication date: 2017-06-01
Anticipated expiration: 2035-06-03

Description

本発明は、以下のような解決手段により、前記課題を解決する。なお、理解を容易にするために、本発明の実施形態に対応する符号を付して説明するが、これに限定されるものではない。
第１の発明は、複数配列された画素領域から映像光（Ｌ）を出射する映像源（１１）と、前記映像光を拡大して観察者側へ出射するレンズ（１２）と、前記映像源及び前記レンズ間、又は、前記レンズの観察者側に配置される光学シート（２０）とを備え、前記光学シートは、少なくとも２層以上の光学層（２１、２２、２３）を有し、各前記光学層間の界面に微細な凸形状（２１ａ、２３ａ）が複数形成されていること、を特徴とする表示装置（１）である。
第２の発明は、第１の発明の表示装置において、互いに隣接する前記光学層の屈折率の差Δｎが、０．００５≦Δｎ≦０．１を満たすこと、を特徴とする表示装置である。
第３の発明は、第１の発明又は第２の発明の表示装置において、前記光学シートの半値角αが、０．０５°≦α≦０．２°を満たすこと、を特徴とする表示装置である。
第４の発明は、第１の発明から第３の発明までのいずれか１項の表示装置において、最大輝度が１／２０となる前記光学シートの視野角βが、β≦５×αを満たすこと、を特徴とする表示装置である。
第５の発明は、第１の発明から第４の発明までのいずれかの表示装置（１）において、前記凸形状（２１ａ、２３ａ）は、前記光学シート（２０）の厚み方向（Ｙ方向）に直交するシート面（ＸＺ面）内の第１の方向（Ｚ方向、Ｘ方向）に延在し、前記シート面内の前記第１の方向に交差する第２の方向（Ｘ方向、Ｚ方向）に配列され、前記光学シートの厚み方向に平行であって前記第２の方向に平行な断面における断面形状が略円弧状に形成されていること、を特徴とする表示装置である。
第６の発明は、複数配列された画素領域から映像光（Ｌ）を出射する映像源（１１）と、前記映像光を拡大して観察者側へ出射するレンズ（１２）と、前記映像源及び前記レンズ間、又は、前記レンズの観察者側に配置される光学シート（２０）とを備え、前記光学シート（２０）は、３層以上の光学層を有し、各前記光学層間の各界面に凸形状が複数形成されており、各前記凸形状は、前記光学シートの厚み方向に直交するシート面内に延在し、各前記凸形状の前記シート面（ＸＺ面）内における延在方向（Ｚ方向、Ｘ方向）は、前記光学シートの厚み方向（Ｙ方向）から見て交差していること、を特徴とする表示装置である。
第７の発明は、第６の発明の表示装置において、互いに隣接する前記光学層の屈折率の差Δｎが、０．００５≦Δｎ≦０．１を満たすこと、を特徴とする表示装置である。
第８の発明は、第６の発明又は第７の発明の表示装置において、前記光学シートの半値角αが、０．０５°≦α≦０．２°を満たすこと、を特徴とする表示装置である。
第９の発明は、第６の発明から第８の発明までのいずれか１項の表示装置において、最大輝度が１／２０となる前記光学シートの視野角βが、β≦５×αを満たすこと、を特徴とする表示装置である。 The present invention solves the above problems by the following means. In addition, in order to make an understanding easy, although the code | symbol corresponding to embodiment of this invention is attached | subjected and demonstrated, it is not limited to this.
According to a first aspect of the present invention, there is provided an image source (11) for emitting image light (L) from a plurality of arranged pixel regions, a lens (12) for enlarging and emitting the image light to an observer side, and the image source And an optical sheet (20) disposed between the lenses or on the viewer side of the lens, and the optical sheet has at least two optical layers (21, 22, 23 ) , the possible fine convex at the interface between the optical layer (21a, 23a) is formed with a plurality of a display device according to claim (1).
A second invention is the display device according to the first invention, wherein a difference Δn in refractive index between adjacent optical layers satisfies 0.005 ≦ Δn ≦ 0.1. .
According to a third aspect of the present invention, in the display device of the first or second aspect, the half-value angle α of the optical sheet satisfies 0.05 ° ≦ α ≦ 0.2 °. It is.
According to a fourth invention, in the display device according to any one of the first invention to the third invention, the viewing angle β of the optical sheet at which the maximum luminance is 1/20 satisfies β ≦ 5 × α. This is a display device characterized by the above.
According to a fifth invention, in any one of the display devices (1) from the first invention to the fourth invention , the convex shape (21a, 23a) is a thickness direction (Y direction) of the optical sheet (20). A second direction (X direction, Z direction) that extends in a first direction (Z direction, X direction) in the sheet surface (XZ plane) orthogonal to the first plane and intersects the first direction in the sheet surface The cross-sectional shape in a cross section parallel to the thickness direction of the optical sheet and parallel to the second direction is formed in a substantially arc shape.
According to a sixth aspect of the present invention, there is provided an image source (11) that emits image light (L) from a plurality of arranged pixel regions, a lens (12) that expands the image light and emits the image light to an observer side, and the image source and between the lens, or an optical sheet (20) disposed on the viewer's side of the lens, the optical sheet (20) has three or more layers of optical layers, between each of said optical layer A plurality of convex shapes are formed on each interface , and each convex shape extends in a sheet surface orthogonal to the thickness direction of the optical sheet, and extends in the sheet surface (XZ surface) of each convex shape. The present invention is a display device characterized in that the present direction (Z direction, X direction) intersects when viewed from the thickness direction (Y direction) of the optical sheet.
A seventh invention is the display device according to the sixth invention, wherein a difference Δn in refractive index between the optical layers adjacent to each other satisfies 0.005 ≦ Δn ≦ 0.1. .
According to an eighth aspect of the present invention, in the display device according to the sixth or seventh aspect, the half-value angle α of the optical sheet satisfies 0.05 ° ≦ α ≦ 0.2 °. It is.
According to a ninth invention, in the display device according to any one of the sixth invention to the eighth invention, the viewing angle β of the optical sheet at which the maximum luminance is 1/20 satisfies β ≦ 5 × α. This is a display device characterized by the above.

Claims

An image source for emitting image light from a plurality of arranged pixel regions ;
A lens that magnifies and emits the image light to the viewer side;
An optical sheet disposed between the image source and the lens or on the viewer side of the lens;
The optical sheet has at least two or more layers of optical layers, the interface convex shape of each of said optical layers is formed with a plurality,
Display device according to claim.

  The display device according to claim 1,
  The refractive index difference Δn of the optical layers adjacent to each other satisfies 0.005 ≦ Δn ≦ 0.1;
  A display device.

  The display device according to claim 1 or 2,
  The half-value angle α of the optical sheet satisfies 0.05 ° ≦ α ≦ 0.2 °,
  A display device.

  In the display device according to any one of claims 1 to 3,
  The viewing angle β of the optical sheet having a maximum luminance of 1/20 satisfies β ≦ 5 × α,
  A display device.

In the display device according to any one of claims 1 to 4 ,
The convex shape extends in a first direction in a sheet surface orthogonal to the thickness direction of the optical sheet, and is arranged in a second direction intersecting the first direction in the sheet surface, and the optical The cross-sectional shape in a cross section parallel to the thickness direction of the sheet and parallel to the second direction is formed in a substantially arc shape,
A display device.

An image source for emitting image light from a plurality of arranged pixel regions;
A lens that magnifies and emits the image light to the viewer side;
An optical sheet disposed between the image source and the lens or on the viewer side of the lens;
The optical sheet has three or more optical layers , and a plurality of convex shapes are formed at each interface between the optical layers ,
Each of the convex shapes extends in a sheet plane orthogonal to the thickness direction of the optical sheet,
The extending direction of each convex shape in the sheet surface intersects when viewed from the thickness direction of the optical sheet,
A display device.

  The display device according to claim 6,
  The refractive index difference Δn of the optical layers adjacent to each other satisfies 0.005 ≦ Δn ≦ 0.1;
  A display device.

  The display device according to claim 6 or 7,
  The half-value angle α of the optical sheet satisfies 0.05 ° ≦ α ≦ 0.2 °,
  A display device.

  The display device according to any one of claims 6 to 8,
  The viewing angle β of the optical sheet having a maximum luminance of 1/20 satisfies β ≦ 5 × α,
  A display device.