JP2003215348A - Light guide film - Google Patents
Light guide filmInfo
- Publication number
- JP2003215348A JP2003215348A JP2002013046A JP2002013046A JP2003215348A JP 2003215348 A JP2003215348 A JP 2003215348A JP 2002013046 A JP2002013046 A JP 2002013046A JP 2002013046 A JP2002013046 A JP 2002013046A JP 2003215348 A JP2003215348 A JP 2003215348A
- Authority
- JP
- Japan
- Prior art keywords
- light
- light guide
- film
- guide film
- guided
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Light Guides In General And Applications Therefor (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、導光フィルムに関
し、特に、太陽光を屋内に効率的に導く導光フィルムに
関するものである。
【０００２】
【従来の技術】従来、太陽光を室内に取り込むシステム
としては、
Ａ．キャットウォークのような通りに光反射板を設置し
てその光反射板により太陽光を反射させて取り込むもの
（例えば、特開平１０−２６９８１１号、特開平５−６
０９６４号、特開平１１−２５７２６号）、
Ｂ．天窓より直接太陽光を取り込むもの（例えば、特開
平１１−２１８７２０号）、
Ｃ．光ファイバーを使用するもの（例えば、特開平７−
５７５２５号、特開平７−３３５００４号）、等、が提
案されている。
【０００３】
【発明が解決しようとする課題】しかしながら、上記の
Ａ、Ｂでは任意の場所に太陽光を導いて照明に用いるの
は困難であり、Ｃでは多数の光ファイバーを必要とし、
手軽に安価に設置することは困難であった。
【０００４】本発明は従来技術のこのような問題点に鑑
みてなされたものであり、その目的は、太陽光等を取り
込み任意の場所へ簡便に導くことができる導光フィルム
を提供することである。
【０００５】
【課題を解決するための手段】上記目的を達成する本発
明の導光フィルムは、可撓性を持つ透明フィルムからな
り、該透明フィルムには光導入手段及び光出射手段が設
けられ、該光導入手段から前記透明フィルムに導入され
た光は前記光出射手段に導かれ、前記光出射手段より光
が出射されることを特徴とするものである。
【０００６】本発明によると、光導入手段から透明フィ
ルムに導入された光は光出射手段に導かれ、光出射手段
より光が出射されるので、簡単で安価な構成により任意
の場所に太陽光等の光を効率良く導くことができる。
【０００７】
【発明の実施の形態】本発明の導光フィルムは、可撓性
を持つ透明フィルムを用いて屋外に設置した端部近傍か
ら太陽光を透明フィルム内に取り込み、透明フィルムの
表面での空気との屈折率差を利用して内部に取り込んだ
太陽光を全反射させて屋内に設置した他端部に導き、そ
の他端部近傍から導光された太陽光を放出させて屋内等
の任意の場所を照明するものである。以下、実施例に基
づいて本発明の導光フィルムを説明する。
【０００８】図１は、本発明に基づく１実施例の導光フ
ィルム１０の平面図（ａ）と側面図（ｂ）であり、導光
フィルム１０は、長さＬ、幅Ｗ、厚さｔのＰＥＴ等の樹
脂製の透明フィルム１からなり、その長手方向の両端部
１１と１２のそれぞれ長さＬ 1 、Ｌ2 部分の同じ側面
は、表面平均粗さＲａのサンドブラスト処理面（凹凸
面、粗面）２に加工されており、他方の面は平滑面とな
っている。また、その両端部１１と１２の間の長さＬ3
の部分１３は両面共平滑面となっている。なお、導光フ
ィルム１０の材料は、ＰＥＴだけでなく、アクリル樹
脂、ポリカーボネート等の他の透明樹脂でも可能であ
り、ガラスでもよい。また、凹凸面２は、熱転写、成形
（射出成形、押出成形等）の熱可塑性樹脂に型を接触さ
せて作成したり、微細ビーズをバインダーに添加して表
面に塗布したり、レジストにて形成する等、種々の方法
を採用して作成することが可能である。
【０００９】導光フィルム１０はこのような構成であ
り、一端部１１は光導入部、中間部１３は導光部、他端
部１２は光出射部として機能するもので、光導入部１１
の片面の凹凸面２に入射した光はそこで透明フィルム１
内に散乱され、大部分の散乱光は透明フィルム１の両面
に空気の屈折率と透明フィルム１の屈折率の差で決まる
臨界角以上の角度で入射して全反射され、透明フィルム
１内で多重反射されて導光される光に変換され、その導
光光は導光部１３を経て他端の光出射部１２へと導か
れ、その片面の凹凸面２に入射した光はそこで大部分透
明フィルム１外に散乱されて出射し、照明光等として利
用可能になる。
【００１０】ここで、光導入部１１の端面１４、光出射
部１２の端面１５に入射した光は外部に出てしまい、有
効に利用されない。そこで、少なくともこれら端面１
４、１５には、Ａｇ，Ａｌ，Ａｕ，Ｐｔ，Ｃｕ等の光反
射金属、白色塗料等の光反射層３を施して、それら端面
１４、１５に入射した導光光を反対側に反射させて有効
に利用できるようにすることが望ましい。さらには、導
光フィルム１０の長手方向に沿う両端面１６、１７に
も、同様に、金属コート等の光反射面を施して導光され
る光が外に漏れるのを防止するようにするのが望まし
い。
【００１１】ここで、光導入部１１及び光出射部１２の
片面に形成される凹凸面２の表面平均粗さＲａとして
は、０．１〜１０００μｍの範囲に選ぶことが効率的に
光を導入するのに好ましく、さらには１〜１００μｍの
範囲に選ぶことがより好ましく、その範囲が２〜５０μ
ｍの範囲に選ぶことが最も好ましい。
【００１２】本発明のこのような導光フィルム１０は、
図２に模式的に示すように、家屋Ｈの屋根上にその光導
入部１１の凹凸面２が天空を向くように設置し、その光
導入部１１に続く導光部１３を任意に曲げて家屋Ｈの屋
内に光出射部１２の凹凸面２が下方を向くように光出射
部１２を設置することにより、太陽Ｓからの太陽光を光
導入部１１の凹凸面２により導光フィルム１０内に導入
し、その太陽光を導光部１３を経て光出射部１２に導
き、その光出射部１２の凹凸面２から導光フィルム１０
外に出射させて屋内の照明に利用できる。
【００１３】このように太陽光を屋内に効率的に導く導
光フィルム１０としては、光導入部１１と光出射部１２
の長さＬ1 、Ｌ2 は例えば１ｍに、導光部１３の長さＬ
3 は例えば２ｍに、また、その幅Ｗは５０ｃｍに選ばれ
るが、もちろんこれらの寸法は種々に変更できる。
【００１４】さらに、導光フィルム１０の厚さｔとして
は、１０〜２００００μｍの範囲に選ぶことが好まし
い。この範囲の厚さより薄すぎると、その強度が低下し
すぎ、また、光の導光効率が低下してしまう。厚すぎる
と、設置時にフレキシブルに曲げることが困難となる。
また、材料費も高価となる。この厚さｔの範囲は、１０
０〜１００００μｍの範囲がさらに好ましく、１５０〜
５０００μｍの範囲が特に好ましく、２００〜２０００
μｍの範囲が最も好ましい。
【００１５】ところで、図２のように、太陽光を家屋Ｈ
の屋内に導くためにその屋根と屋内間に本発明の導光フ
ィルム１０を設置するとき、屋根と屋内をつなぐ導光部
１３の一部は、図に示すように曲率半径Ｒで曲げられる
が、その曲げ部の上面の最も低い位置の高さと屋内への
導入部の上面の高さとの間が、曲げ部の高さが導入部の
の高さよりｄだけ低くなるように設置することが、この
導光フィルム１０を伝わって雨水が屋内に浸入しないよ
うにする上で重要である。屋内への導入後の光出射部の
高さを曲げ部の高さより低くしても、このような構成に
より雨水が屋内に浸入することはない。
【００１６】また、屋根と屋内をつなぐ導光部１３の一
部は曲率半径Ｒで曲げられるが、その曲率半径Ｒは、１
〜１０００ｍｍの範囲になるように選ぶことが好まし
い。この範囲より曲率半径Ｒが小さすぎると、導光光が
導光フィルム１０の外に逃げてしまい光の導光効率が低
下してしまう。曲率半径Ｒがその範囲より大きすぎる
と、導光フィルム１０の設置の自由度が低下して実用性
が低くなってしまう。この曲率半径Ｒの範囲は、２〜５
００ｍｍの範囲がさらに好ましく、５〜２００ｍｍの範
囲が特に好ましく、１０〜１００ｍｍの範囲が最も好ま
しい。
【００１７】図３は、本発明による導光フィルム１０の
別の形態のものを家屋Ｈの屋根上に設置して屋内の２か
所に導く例を示す図であり、この場合、導光フィルム１
０の光導入部１１の凹凸面２が透明フィルム１の端部で
なく略中央部に天空を向くように設けられ、その光導入
部１１に続く両側に導光部１３を設け、その導光部１３
を任意に曲げて屋内に光出射部１２の凹凸面２が下方を
向くように透明フィルム１の両端に光出射部１２を設け
ることにより、太陽Ｓからの太陽光を光導入部１１の凹
凸面２により導光フィルム１０内に導入し、その太陽光
を光導入部１１の両側の導光部１３を経て２か所の光出
射部１２に導き、その光出射部１２の凹凸面２から導光
フィルム１０外に出射させて屋内の２か所の照明に利用
するものである。この例から明らかなように、光導入部
１１、光出射部１２は導光フィルム１０の端部に限ら
ず、中間部に設けてもよく、また、それぞれ１個に限ら
ず複数設けてのよい。
【００１８】以上、本発明の導光フィルムを実施例に基
づいて説明してきたが、本発明はこれら実施例に限定さ
れず種々の変形が可能である。また、その導光フィルム
としても、太陽光の屋内への導入に限らず他の用途にも
使用できる。例えば、液晶表示装置において、バックラ
イトの補助として外光を液晶表示装置の照明光として導
くのに本発明の導光フィルムを利用することができる。
【００１９】以上の本発明の導光フィルムは、例えば次
のように構成することができる。
【００２０】〔１〕 可撓性を持つ透明フィルムからな
り、該透明フィルムには光導入手段及び光出射手段が設
けられ、該光導入手段から前記透明フィルムに導入され
た光は前記光出射手段に導かれ、前記光出射手段より光
が出射されることを特徴とする導光フィルム。
【００２１】〔２〕 前記光導入手段と前記光出射手段
が凹凸面からなることを特徴とする上記１記載の導光フ
ィルム。
【００２２】〔３〕 少なくとも前記透明フィルムの両
端の端面に光反射層が設けられていることを特徴とする
上記１又は２記載の導光フィルム。
【００２３】〔４〕 太陽光を任意の場所に導くのに用
いられることを特徴とする上記１から３の何れか１項記
載の導光フィルム。
【００２４】〔５〕 太陽光を屋外から屋内に導くのに
用いられることを特徴とする上記１から３の何れか１項
記載の導光フィルム。
【００２５】〔６〕 屋外に位置する部分の少なくとも
一部の高さが屋内に導入する部分の高さより低くなるよ
うに設置されていることを特徴とする上記５記載の導光
フィルム。
【００２６】
【発明の効果】以上の説明から明らかなように、本発明
の導光フィルムにおいては、光導入手段から透明フィル
ムに導入された光は光出射手段に導かれ、光出射手段よ
り光が出射されるので、簡単で安価な構成により任意の
場所に太陽光等の光を効率良く導くことができる。DETAILED DESCRIPTION OF THE INVENTION
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light guide film.
In particular, it is a light guide film that efficiently guides sunlight indoors.
It is related.
[0002]
Conventionally, a system for taking sunlight into a room
as,
A. Install a light reflector on the street like a catwalk
Reflecting and capturing sunlight by the light reflector
(For example, JP-A-10-269811, JP-A-5-6
0964, JP-A-11-25726),
B. Taking sunlight directly from the skylight (for example, JP
Hei 11-218720),
C. Using an optical fiber (for example, JP-A-7-
57525, JP-A-7-33004), etc.
It has been proposed.
[0003]
However, the above-mentioned problem is
A and B are used for lighting by directing sunlight to any place.
Is difficult, C requires a large number of optical fibers,
It was difficult to install easily and inexpensively.
The present invention is based on such problems of the prior art.
The purpose is to take sunlight and so on.
Light guide film that can be easily guided to any place
Is to provide.
[0005]
The present invention achieves the above object.
The light guide film is made of a transparent film that is flexible.
The transparent film is provided with light introducing means and light emitting means.
Introduced into the transparent film from the light introducing means.
The light is guided to the light emitting means and light is emitted from the light emitting means.
Is emitted.
According to the present invention, a transparent film is introduced from the light introducing means.
The light introduced into the rum is guided to the light emitting means, and the light emitting means
Since more light is emitted, it is optional with a simple and inexpensive configuration
It is possible to efficiently guide light such as sunlight to the place.
[0007]
The light guide film of the present invention is flexible.
Near the edge installed outdoors using a transparent film with
From the sunlight into the transparent film.
Using the difference in refractive index with air on the surface, it was taken inside
The sunlight is totally reflected and led to the other end installed indoors.
Indoors, etc. by emitting sunlight guided from the other end of the
It is intended to illuminate any place. Hereinafter, based on the examples
Next, the light guide film of the present invention will be described.
FIG. 1 shows a light guide frame of an embodiment according to the present invention.
It is the top view (a) and side view (b) of film 10, and is light guide
The film 10 is made of PET such as PET having a length L, a width W, and a thickness t.
Consisting of a transparent film 1 made of fat, both ends in the longitudinal direction
Length L of 11 and 12 respectively 1, L2The same side of the part
Is a sandblasted surface with an average surface roughness Ra (unevenness
Surface, rough surface) 2 and the other surface is a smooth surface.
ing. Also, the length L between the end portions 11 and 12Three
The part 13 is a smooth surface on both sides. In addition, light guide
The material of the film 10 is not only PET but also acrylic tree
Other transparent resins such as fat and polycarbonate are also possible.
Or glass. Also, the uneven surface 2 is formed by thermal transfer or molding.
The mold is in contact with the thermoplastic resin (injection molding, extrusion molding, etc.)
Or by adding fine beads to the binder
Various methods such as coating on the surface or forming with resist
It is possible to adopt and create.
The light guide film 10 has such a structure.
The one end 11 is a light introducing portion, the intermediate portion 13 is a light guiding portion, and the other end
The part 12 functions as a light emitting part, and the light introducing part 11.
The light incident on the uneven surface 2 on one side of the transparent film 1
Most of the scattered light is scattered on both sides of the transparent film 1
Is determined by the difference between the refractive index of air and the refractive index of the transparent film 1
Transparent film that is incident at a critical angle or more and totally reflected.
1 is converted into light that is multiple-reflected and guided within
The light is guided to the light emitting part 12 at the other end via the light guiding part 13.
The light incident on the uneven surface 2 on one side is mostly transmitted there.
Scattered and emitted from the bright film 1 and used as illumination light
Become available.
Here, the end face 14 of the light introducing portion 11, the light emission.
The light incident on the end face 15 of the portion 12 exits to the outside and
It is not used effectively. Therefore, at least these end faces 1
4 and 15 include optical reactions such as Ag, Al, Au, Pt, and Cu.
Applying a light reflecting layer 3 such as a metallic metal or white paint, the end faces
Effective by reflecting the light guided to 14 and 15 to the opposite side
It is desirable to be able to use it. Furthermore, guiding
On both end faces 16 and 17 along the longitudinal direction of the optical film 10
Similarly, it is light-guided with a light reflecting surface such as a metal coat.
To prevent the light from leaking outside
Yes.
Here, the light introduction part 11 and the light emission part 12
As the surface average roughness Ra of the uneven surface 2 formed on one side
Is effectively selected within the range of 0.1 to 1000 μm
Preferred for introducing light, more preferably 1-100 μm
It is more preferable to select the range, and the range is 2 to 50 μm.
Most preferably, it is selected in the range of m.
Such a light guide film 10 of the present invention comprises:
As schematically shown in FIG. 2, the light on the roof of the house H
Installed so that the uneven surface 2 of the entrance 11 faces the sky.
The house of the house H by arbitrarily bending the light guide part 13 following the introduction part 11
Light is emitted so that the concavo-convex surface 2 of the light emitting portion 12 faces downward.
By installing the part 12, the sunlight from the sun S is lighted.
Introduced into the light guide film 10 by the uneven surface 2 of the introduction part 11
Then, the sunlight is guided to the light emitting part 12 through the light guiding part 13.
The light guide film 10 from the uneven surface 2 of the light emitting portion 12.
It can be emitted outside and used for indoor lighting.
In this way, the light is efficiently guided indoors.
As the optical film 10, a light introducing part 11 and a light emitting part 12.
Length L1, L2For example, the length L of the light guide 13 is 1 m.
ThreeFor example 2m, and its width W is chosen to be 50cm
Of course, these dimensions can be varied.
Furthermore, as the thickness t of the light guide film 10,
Is preferably selected in the range of 10-20000 μm
Yes. If the thickness is too thin, the strength will decrease.
Moreover, the light guide efficiency of light will fall. Too thick
And it becomes difficult to bend flexibly at the time of installation.
In addition, the material cost is expensive. The range of this thickness t is 10
The range of 0 to 10000 μm is more preferable, 150 to
A range of 5000 μm is particularly preferred, 200-2000.
The range of μm is most preferable.
By the way, as shown in FIG.
The light guide film of the present invention is installed between the roof and the indoor space to guide the indoor space.
When installing the film 10, the light guide that connects the roof and the indoor
A part of 13 is bent with a radius of curvature R as shown in the figure.
However, the height of the lowest position on the upper surface of the bend and the indoor
The height of the bent part is between the height of the upper surface of the introduction part and the height of the introduction part.
It should be installed so that it is lower by d than the height of
Rainwater does not enter indoors through the light guide film 10
It is important in doing so. Of the light emitting part after indoor installation
Even if the height is lower than the height of the bent part,
More rainwater will not enter indoors.
In addition, one of the light guides 13 connecting the roof and the indoors.
The part is bent with a radius of curvature R, and the radius of curvature R is 1
It is preferable to choose to be in the range of ~ 1000mm
Yes. If the curvature radius R is too small than this range, the guided light is not
Light escapes out of the light guide film 10 and the light guiding efficiency is low
I will defeat. The radius of curvature R is too larger than the range
And the degree of freedom of installation of the light guide film 10 is reduced and practical
Will be lower. The range of this radius of curvature R is 2-5.
A range of 00 mm is more preferred, and a range of 5 to 200 mm.
Surrounding is particularly preferred, with a range of 10-100 mm being most preferred
That's right.
FIG. 3 shows a light guide film 10 according to the present invention.
Another type is installed on the roof of house H,
It is a figure which shows the example led to the place, In this case, the light guide film 1
The uneven surface 2 of the light introducing portion 11 of 0 is the end of the transparent film 1
It is installed so that it faces the sky almost in the center, and its light introduction
The light guide part 13 is provided on both sides following the part 11, and the light guide part 13
The concave / convex surface 2 of the light emitting part 12 is lowered downward indoors
Light emitting parts 12 are provided at both ends of the transparent film 1 so as to face
The sun light from the sun S
It is introduced into the light guide film 10 by the convex surface 2 and its sunlight.
The light is emitted from two places through the light guides 13 on both sides of the light introduction part 11.
Guided to the projecting portion 12 and guided from the uneven surface 2 of the light emitting portion 12
The light is emitted outside the film 10 and used for two indoor lighting.
To do. As is clear from this example, the light introduction part
11, the light emitting portion 12 is limited to the end portion of the light guide film 10.
It may be provided in the middle part, and each is limited to one.
A plurality of them may be provided.
As described above, the light guide film of the present invention is based on the examples.
However, the present invention is not limited to these examples.
However, various modifications are possible. Also, its light guide film
However, it is not limited to the introduction of sunlight indoors but for other purposes
Can be used. For example, in a liquid crystal display device, a backlight
As an aid to the LCD screen, external light is guided as illumination light for the liquid crystal display device.
In particular, the light guide film of the present invention can be used.
The light guide film of the present invention described above is, for example, as follows.
It can be configured as follows.
[1] From a transparent film having flexibility.
The transparent film is provided with light introducing means and light emitting means.
Introduced into the transparent film from the light introducing means.
The light is guided to the light emitting means and light is emitted from the light emitting means.
Is emitted, a light guide film.
[2] Light introducing means and light emitting means
2. The light guide film as described in 1 above, wherein
Film.
[3] At least both of the transparent films
A light reflecting layer is provided on the end face of the end.
3. The light guide film as described in 1 or 2 above.
[4] Used to direct sunlight to an arbitrary place
Any one of items 1 to 3 above, characterized in that
The light guide film.
[5] To guide sunlight from the outside to the inside
Any one of items 1 to 3 above, wherein
The light guide film described.
[6] At least the part located outdoors
Some heights will be lower than the height of the parts to be introduced indoors
The light guide according to 5 above, wherein the light guide is installed
the film.
[0026]
As is apparent from the above description, the present invention.
In the light guide film, transparent film is introduced from the light introduction means
The light introduced into the system is guided to the light emitting means, and the light emitting means
Since the light is emitted, it is possible to use any configuration with a simple and inexpensive configuration.
Light such as sunlight can be efficiently guided to a place.
【図面の簡単な説明】
【図１】本発明に基づく１実施例の導光フィルムの平面
図（ａ）と側面図（ｂ）である。
【図２】本発明の適用例を模式的に示す図である。
【図３】本発明の別の適用例を模式的に示す図である。
【符号の説明】
１…透明フィルム
２…凹凸面（サンドブラスト処理面、粗面）
３…光反射層
１０…導光フィルム
１１…光導入部
１２…光出射部
１３…導光部
１４…光導入部の端面
１５…光出射部の端面
１６、１７…導光フィルムの長手方向に沿う端面
Ｈ…家屋
Ｓ…太陽BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view (a) and a side view (b) of a light guide film of one embodiment according to the present invention. FIG. 2 is a diagram schematically showing an application example of the present invention. FIG. 3 is a diagram schematically showing another application example of the present invention. DESCRIPTION OF SYMBOLS 1 ... Transparent film 2 ... Uneven surface (sandblasted surface, rough surface) 3 ... Light reflection layer 10 ... Light guide film 11 ... Light introduction part 12 ... Light emission part 13 ... Light guide part 14 ... Light introduction End face 15 of the part ... End faces 16 and 17 of the light emitting part ... End face H along the longitudinal direction of the light guide film ... House S ... Sun
Claims (1)
透明フィルムには光導入手段及び光出射手段が設けら
れ、該光導入手段から前記透明フィルムに導入された光
は前記光出射手段に導かれ、前記光出射手段より光が出
射されることを特徴とする導光フィルム。What is claimed is: 1. A transparent film having flexibility, wherein the transparent film is provided with light introducing means and light emitting means, and light introduced from the light introducing means into the transparent film. Is guided to the light emitting means, and light is emitted from the light emitting means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002013046A JP2003215348A (en) | 2002-01-22 | 2002-01-22 | Light guide film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002013046A JP2003215348A (en) | 2002-01-22 | 2002-01-22 | Light guide film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003215348A true JP2003215348A (en) | 2003-07-30 |
Family
ID=27650093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002013046A Pending JP2003215348A (en) | 2002-01-22 | 2002-01-22 | Light guide film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003215348A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101634746B (en) * | 2008-07-23 | 2010-11-10 | 台湾基材科技股份有限公司 | Sunlight collecting device |
| JP2011018459A (en) * | 2009-07-07 | 2011-01-27 | Nippon Light Metal Co Ltd | Lighting device and roof structure with lighting device using the same |
| US8615925B2 (en) | 2010-02-16 | 2013-12-31 | Fujifilm Corporation | Light guiding film and plant growing method using the light guiding film |
| JP5556938B1 (en) * | 2013-03-29 | 2014-07-23 | 大日本印刷株式会社 | Solar lighting system |
| KR20190084572A (en) * | 2018-01-08 | 2019-07-17 | 김현 | Transmission Apparatus Of Solar Light |
| US10718479B2 (en) | 2016-11-03 | 2020-07-21 | Basf Se | Daylighting illumination system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63162301U (en) * | 1987-04-13 | 1988-10-24 | ||
| JPS63310010A (en) * | 1987-06-11 | 1988-12-19 | Mitsubishi Rayon Co Ltd | Sunray tracking equipment |
| JPH04249203A (en) * | 1991-01-25 | 1992-09-04 | Lumitex Inc | Panel illuminator |
| JPH06160843A (en) * | 1992-05-11 | 1994-06-07 | Meitaku Syst:Kk | Back light sheet |
| JPH11329042A (en) * | 1998-05-12 | 1999-11-30 | Fuji Photo Film Co Ltd | Flat surface light source, exposing element and flat surface display device |
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2002
- 2002-01-22 JP JP2002013046A patent/JP2003215348A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63162301U (en) * | 1987-04-13 | 1988-10-24 | ||
| JPS63310010A (en) * | 1987-06-11 | 1988-12-19 | Mitsubishi Rayon Co Ltd | Sunray tracking equipment |
| JPH04249203A (en) * | 1991-01-25 | 1992-09-04 | Lumitex Inc | Panel illuminator |
| JPH06160843A (en) * | 1992-05-11 | 1994-06-07 | Meitaku Syst:Kk | Back light sheet |
| JPH11329042A (en) * | 1998-05-12 | 1999-11-30 | Fuji Photo Film Co Ltd | Flat surface light source, exposing element and flat surface display device |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101634746B (en) * | 2008-07-23 | 2010-11-10 | 台湾基材科技股份有限公司 | Sunlight collecting device |
| JP2011018459A (en) * | 2009-07-07 | 2011-01-27 | Nippon Light Metal Co Ltd | Lighting device and roof structure with lighting device using the same |
| US8615925B2 (en) | 2010-02-16 | 2013-12-31 | Fujifilm Corporation | Light guiding film and plant growing method using the light guiding film |
| JP5556938B1 (en) * | 2013-03-29 | 2014-07-23 | 大日本印刷株式会社 | Solar lighting system |
| US10718479B2 (en) | 2016-11-03 | 2020-07-21 | Basf Se | Daylighting illumination system |
| US10794557B2 (en) | 2016-11-03 | 2020-10-06 | Basf Se | Daylighting panel |
| US11209142B2 (en) | 2016-11-03 | 2021-12-28 | Skynative UG | Daylighting illumination system |
| KR20190084572A (en) * | 2018-01-08 | 2019-07-17 | 김현 | Transmission Apparatus Of Solar Light |
| KR102030654B1 (en) * | 2018-01-08 | 2019-10-10 | 김현 | Transmission Apparatus Of Solar Light |
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