JP2011191595A5

JP2011191595A5 -

Info

Publication number: JP2011191595A5
Application number: JP2010058749A
Authority: JP
Filing date: 2010-03-16
Publication date: 2013-04-11
Anticipated expiration: 2030-03-16

Description

本発明に係る表示装置において、光射出点群のピッチＰｐとレンズのピッチＬｐが次式（２）を満たすことが好ましい。
Ｌｐ／Ｐｐ＝（Ｆｆ−Ｆ）／Ｆｆ・・・（２）
但し、
Ｆｆは前記複数のレンズと前記光射出点群の像との距離、
Ｆは前記複数のレンズの焦点距離、
である。 In the display device according to the present invention, it is preferable that the light emission point group pitch Pp and the lens pitch Lp satisfy the following expression (2).
Lp / Pp = (Ff−F) / Ff (2)
However,
Ff is the distance between the plurality of lenses and the image of the light exit point group,
F is the focal length of the plurality of lenses,
It is.

本発明に係る表示ユニットにおいて、開口群のピッチＰｐとレンズのピッチＬｐが次式（３）を満たすことが好ましい。
Ｌｐ／Ｐｐ＝（Ｆｆ−Ｆ）／Ｆｆ・・・（３）
但し、
Ｆｆは前記複数のレンズと前記光射出点群の像との距離、
Ｆは前記複数のレンズの焦点距離、
である。 In the display unit according to the present invention, it is preferable that the pitch Pp of the aperture group and the pitch Lp of the lens satisfy the following expression (3).
Lp / Pp = (Ff−F) / Ff (3)
However,
Ff is the distance between the plurality of lenses and the image of the light exit point group,
F is the focal length of the plurality of lenses,
It is.

また、レンズ１０２は、眼のレンズ１０３により、網膜１０５の近傍１０５’に結像される。具体的には、レンズ１０２の点１０２ａは、光線１０７ａ、１０８ａ、１０７ｃ、１０８ｃで示されるように、近傍１０５ａに結像する。また、レンズ１０２の点１０２ｂは、光線１０７ｂ、１０８ｂ、１０７ｄ、１０８ｄで示されるように、近傍１０５ｂに結像する。このように、網膜１０５の近傍１０５’に、レンズ１０２の像１０６が形成される。
レンズ１０２と光射出点群の像との距離をＦｆ、レンズ１０２と光射出点１０１との距離をＦｂとする。レンズ２の焦点距離をＦとすると、次式（４）が成り立つ。
１／Ｆｆ＋１／Ｆｂ＝１／Ｆ・・・（４） The lens 102 is imaged in the vicinity 105 ′ of the retina 105 by the eye lens 103. Specifically, the point 102a of the lens 102 forms an image in the vicinity 105a as indicated by light rays 107a, 108a, 107c, and 108c. Further, the point 102b of the lens 102 forms an image in the vicinity 105b as indicated by light rays 107b, 108b, 107d, and 108d. Thus, the image 106 of the lens 102 is formed in the vicinity 105 ′ of the retina 105.
The distance between the lens 102 and the light emission point group image is Ff, and the distance between the lens 102 and the light emission point 101 is Fb. When the focal length of the lens 2 is F, the following expression (4) is established.
1 / Ff + 1 / Fb = 1 / F (4)

図１において、隣り合う光射出点１０１ａ、１０１ｂ、１０１ｃ（或いは後述する光射出点群）のピッチ（繰返しの間隔）をＰｐ、隣り合うレンズ１０２ａ、１０２ｂ、１０２ｃ（後述するマイクロレンズアレイのレンズに相当する）のピッチをＬｐとすると、これらは次式（５）を満たす。
Ｌｐ／Ｐｐ＝Ｆｆ／（Ｆｆ＋Ｆｂ）＝（Ｆｆ−Ｆ）／Ｆｆ・・・（５） In FIG. 1, the pitch (repetitive interval) of adjacent light exit points 101a, 101b, 101c (or a light exit point group described later) is Pp, and adjacent lenses 102a, 102b, 102c (to the lenses of a micro lens array described later). These pitches satisfy the following formula (5).
Lp / Pp = Ff / (Ff + Fb) = (Ff−F) / Ff (5)

光射出点群１２１ａ、１２１ｂ、１２１ｃは、レンズ１０２ｂによってそれぞれ投影される。これにより、光射出点群像１２２ａ、１２２ｂ、１２２ｃが、それぞれ形成される（図４）。また、レンズ１０２ａによって、光射出点群１２１ａは光射出点群像１２２ｂの位置に投影され、光射出点群１２１ｂは、光射出点群像１２２ｃの位置に投影される。また、レンズ１０２ｃによって、光射出点群１２１ｂは光射出点群像１２２ａの位置に投影され、光射出点群１２１ｃは光射出点群像１２２ｂの位置に投影される。なお、本実施形態の表示装置においても、レンズ１０２ａ、１０２ｂ、１０２ｃによって、瞳１０３ａに、光射出点１２３ａ、１２３ｂ、１２３ｃの像が重なるように投影される。また、レンズ１０２ａ、１０２ｂ、１０２ｃについては、眼のレンズ１０３によって網膜上にこれらの投影像１２４ａ、１２４ｂ、１２４ｃが形成される。光射出点群１２１ａ、１２１ｂ、１２１ｃ間のピッチＰｐとレンズ１０２ａ、１０２ｂ、１０２ｃのピッチＬｐの関係も、次式（５）を満たす。
Ｌｐ／Ｐｐ＝Ｆｆ／（Ｆｆ＋Ｆｂ）＝（Ｆｆ−Ｆ）／Ｆｆ・・・（５）
Ｆｆは、レンズ１０２ｂから光射出点群の像１２２ｂまでの距離、
Ｆｂは、光射出点群１２１ｂとレンズ１０２ｂとの距離、
Ｆは、レンズ１０２ｂの焦点距離、
である。
なお、光射出点群１２１ａ、１２１ｂ、１２１ｃをＲ（赤）、Ｇ（緑）、Ｂ（青）にそれぞれ対応させれば、観察者はカラー画像を観察できる。なお、光射出点群の間に隙間があるように描かれているが、説明の便宜上のもので、実際には不必要な隙間が無いのは、言うまでもない。 The light emission point groups 121a, 121b, and 121c are respectively projected by the lens 102b. Thereby, the light emission point group images 122a, 122b, and 122c are respectively formed (FIG. 4). Further, the lens 102a projects the light exit point group 121a onto the position of the light exit point group image 122b, and the light exit point group 121b projects onto the position of the light exit point group image 122c. The lens 102c projects the light exit point group 121b onto the position of the light exit point group image 122a, and the light exit point group 121c projects onto the position of the light exit point group image 122b. In the display device of this embodiment, the images of the light exit points 123a, 123b, and 123c are projected on the pupil 103a by the lenses 102a, 102b, and 102c so as to overlap each other. For the lenses 102a, 102b, and 102c, these projection images 124a, 124b, and 124c are formed on the retina by the eye lens 103. The relationship between the pitch Pp between the light emission point groups 121a, 121b, and 121c and the pitch Lp of the lenses 102a, 102b, and 102c also satisfies the following equation (5).
Lp / Pp = Ff / (Ff + Fb) = (Ff−F) / Ff (5)
Ff is the distance from the lens 102b to the image 122b of the light exit point group,
Fb is the distance between the light exit point group 121b and the lens 102b,
F is the focal length of the lens 102b,
It is.
If the light emission point groups 121a, 121b, and 121c correspond to R (red), G (green), and B (blue), the observer can observe a color image. In addition, although it is drawn so that there is a gap between the light emission point groups, it is for convenience of explanation, and it is needless to say that there is actually no unnecessary gap.

マイクロレンズアレイ１２７の各レンズ間のピッチＬｐｘ、Ｌｐｙは、光射出点群１２１ａ、１２１ｂ、１２１ｃ（通常情報画素に相当する）のピッチをＰｐｘ、Ｐｐｙとして、次の式（９）及び式（１０）を満たす。
Ｌｐｘ＝ＰｐｘＦｆ／（Ｆｆ＋Ｆｂ）＝Ｐｐｘ（Ｆｆ−Ｆ）／Ｆｆ・・・（９）
Ｌｐｙ＝ＰｐｙＦｆ／（Ｆｆ＋Ｆｂ）＝Ｐｐｙ（Ｆｆ−Ｆ）／Ｆｆ・・・（１０）
ここで、
Ｆｆは、レンズ１０２ｂから光射出点群の像１２２ｂまでの距離、
Ｆｂは、光射出点群１２８とレンズ１２７’との距離、
Ｆは、レンズ１０２ｂの焦点距離、
である。 The pitches Lpx and Lpy between the lenses of the microlens array 127 are expressed by the following formulas (9) and (10) where the pitches of the light emission point groups 121a, 121b, and 121c (corresponding to normal information pixels) are Ppx and Ppy. Is satisfied.
Lpx = PpxFf / (Ff + Fb) = Ppx (Ff−F) / Ff (9)
Lpy = PpyFf / (Ff + Fb) = Ppy (Ff−F) / Ff (10)
here,
Ff is the distance from the lens 102b to the image 122b of the light exit point group,
Fb is the distance between the light exit point group 128 and the lens 127 ′,
F is the focal length of the lens 102b,
It is.

Ｌｐｘ＝ＰｐｘＦｆ／（Ｆｆ＋Ｆｂ）＝Ｐｐｘ（Ｆｆ−Ｆ）／Ｆｆ・・・（９）
Ｌｐｙ＝ＰｐｙＦｆ／（Ｆｆ＋Ｆｂ）＝Ｐｐｙ（Ｆｆ−Ｆ）／Ｆｆ・・・（１０）
上式（９）、（１０）より、短冊状のレンズの大きさは５９．４×１７８．２μｍとなる。短冊状のレンズによって投影される光射出点１３３の光束径は、回折によって広がり、約２．７８ｍｍとなる。この広がりは、通常の眼の瞳径３ｍｍよりも小さいので被写界深度の拡大効果がある。 Lpx = PpxFf / (Ff + Fb) = Ppx (Ff−F) / Ff (9)
Lpy = PpyFf / (Ff + Fb) = Ppy (Ff−F) / Ff (10)
From the above equations (9) and (10), the size of the strip-shaped lens is 59.4 × 178.2 μm. The light beam diameter of the light exit point 133 projected by the strip-shaped lens is expanded by diffraction and becomes about 2.78 mm. Since this spread is smaller than the normal eye pupil diameter of 3 mm, there is an effect of expanding the depth of field.

Claims

A plurality of light emission point groups;
In a display device comprising a plurality of lenses that project the light emission point group,
The light emission point group has at least one light emission point;
Each of the lenses is arranged so as to project the image of the light emission point group,
The overlapping of the light emission points in the light emission point group projected and overlapped by the lens is made incident on the pupil of the observer's eye, thereby generating a projected image of the plurality of lenses on the retina of the observer's eye. ,
A display device, wherein a size of a light exit point projected by the lens is smaller than a pupil diameter of an observer's eye.

The display device according to claim 1, wherein a pitch Pp of the light emission point group and a pitch Lp of the lens satisfy the following expression (2) .
Lp / Pp = (Ff−F) / Ff (2)
However,
Ff is the distance between the plurality of lenses and the image of the light exit point group,
F is the focal length of the plurality of lenses,
It is.

The display device according to claim 1 or claim 2 distance between the image and the lens of the light emission point group Ff is to satisfy the following equation (1).
-L / 2 ≦ Ff ≦ ∞ (1)
However,
L is the distance between the lens and the lens of the observer's eye,
It is.

The display device according to claim 1, wherein the plurality of lenses are configured by a microlens array.

5. The display device according to claim 1, further comprising a light emission point that emits light of at least three colors.

6. The apparatus according to claim 1, further comprising an information pixel including sub-information pixels of different colors, and a lens provided corresponding to the sub-information pixel. Display device.

2. The light emission point group is formed by a plurality of sub information pixels so that the light emission points of sub information pixels of different colors overlap with each other in a projected image, and correspond to one lens. Display device.

The display device according to claim 5, wherein the three colors include red, green, and blue.

7. The display device according to claim 6, wherein the information pixels are composed of sub-information pixels of the same repeating three colors, and the number of sub-information pixels forming the light emission point group is two or four. .

The display device according to claim 6, wherein the information pixel is composed of sub-information pixels of three colors in different orders, and the number of sub-information pixels forming the light emission point group is three.

The display device according to claim 4, wherein an effective dimension of the microlens array is equal to or larger than a display dimension of a display device having the display pixel.

The display device according to claim 6, wherein a shape of the sub information pixel is a strip shape.

The display device according to claim 6, wherein one lens is provided for the two sub information pixels.

The display device according to claim 6, wherein one lens is provided for the three sub information pixels.

The display device according to claim 6, wherein one lens is provided for the four sub information pixels.

The display device according to any one of claims 12 to 15, wherein an image size of the light emission point is 0.5 to 2.8 mm.

The display device according to claim 16, wherein the plurality of lenses includes a microlens array, and the diameter of the lenses is 50 μm or more.

The display device according to claim 6, wherein a liquid crystal display device is used for the information pixel.

The display device according to claim 18, wherein a light source of the liquid crystal device is an LED or an LD.

18. The display device according to claim 6, wherein an organic EL device is used for the information pixel.

A plurality of aperture groups;
In a display unit comprising a plurality of lenses that project the aperture group,
The aperture group has at least one aperture;
Each of the lenses is arranged to project an image of the aperture group,
A projection image of the plurality of lenses is generated on the retina of the viewer's eye by causing the overlap of the apertures in the aperture group projected and overlapped by the lens to enter the pupil of the viewer's eye. Display unit to be used.

The display unit according to claim 21, wherein the pitch Pp of the aperture group and the pitch Lp of the lens satisfy the following expression (3).
Lp / Pp = (Ff−F) / Ff (3)
However,
Ff is the distance between the plurality of lenses and the image of the light exit point group,
F is the focal length of the plurality of lenses,
It is.

The display unit according to claim 21 or 22, wherein the plurality of lenses constitute a microlens array.

The display unit according to claim 23, wherein the aperture group is formed integrally with the microlens array.

The display unit according to claim 24, wherein a size of the lens of the microlens array is 50 µm or more.

26. The display unit according to claim 24, wherein the aperture group is formed by printing on one surface of the microlens array.

An electronic apparatus comprising the display device according to any one of claims 1 to 20.

A portable electronic device comprising the display device according to any one of claims 1 to 20.

A mobile phone comprising the display device according to any one of claims 1 to 20.

The mobile phone according to claim 28, comprising a mail function.

30. The mobile phone according to claim 29, comprising a camera function.

An imaging apparatus comprising the display device according to any one of claims 1 to 20.

33. The imaging apparatus according to claim 32, further comprising a switch for setting photographing conditions.