JP2016024260A

JP2016024260A - Panel member

Info

Publication number: JP2016024260A
Application number: JP2014146616A
Authority: JP
Inventors: 鈴木　裕行; Hiroyuki Suzuki; 裕行鈴木; 谷口　幸夫; Yukio Taniguchi; 幸夫谷口
Original assignee: Dai Nippon Printing Co Ltd
Current assignee: Dai Nippon Printing Co Ltd
Priority date: 2014-07-17
Filing date: 2014-07-17
Publication date: 2016-02-08

Abstract

PROBLEM TO BE SOLVED: To provide a panel member that blocks light incident from a predetermined angle and prevents light pollution generated by the emission of the light.SOLUTION: A panel member 1 comprises: a reflection sheet 2 on at least one surface of which a reflection surface 2a for reflecting light is formed; a prism sheet 3 placed on the side of the reflection surface 2a of the reflection sheet 2 and having a refractive index greater than 1; a plurality of prism arrays 4 that have prismatic shapes extending in a first X axis direction, are placed on the opposite side of the reflection sheet 2 with respect to the prism sheet 3, have refractive indexes greater than 1, and are arrayed in a second Y axis direction orthogonal to the first X axis direction; and a shielding part 5 for shielding light.SELECTED DRAWING: Figure 1

Description

本発明は、所定の角度から入射した光を遮るパネル部材に関するものである。 The present invention relates to a panel member that blocks light incident from a predetermined angle.

従来、シート状のレンチキュラーレンズを用いて、見る角度によって絵柄が変化するレンチキュラーレンズ表示物がある（特許文献１）。 Conventionally, there is a lenticular lens display object that uses a sheet-like lenticular lens and whose pattern changes depending on the viewing angle (Patent Document 1).

特許文献１に記載されたレンチキュラーレンズを用いた光学システムは、例えば、下方の所定の角度から観察者は画像を見ることができ、上方の所定の角度からは太陽光がソーラーパネルに到達するような構成となっている。 In the optical system using the lenticular lens described in Patent Document 1, for example, an observer can see an image from a predetermined angle below, and sunlight reaches the solar panel from a predetermined angle above. It has become a structure.

特表２００９−５２４７９４号公報Special table 2009-524794 gazette

しかしながら、特許文献１に開示された光学システムでは、例えば壁面等に光学システムを設置した場合、その下方の近接した位置に存在する人が、ソーラーパネルで反射した太陽光及び紫外線等をあびてしまい、眩しさや暑さから不快に感じてしまうおそれがあった。 However, in the optical system disclosed in Patent Document 1, for example, when an optical system is installed on a wall surface or the like, a person who is present in the lower vicinity of the optical system is exposed to sunlight and ultraviolet rays reflected by the solar panel. There was a risk of feeling uncomfortable due to dazzling or hot weather.

本発明は、所定の角度から入射する光を遮り、該光が射出することによって生じる光害を抑制するパネル部材を提供する。 The present invention provides a panel member that blocks light incident from a predetermined angle and suppresses light damage caused by the emission of the light.

上記目的を達成する本発明にかかるパネル部材は、
少なくとも一方に光を反射させる反射面が形成された反射シートと、
前記反射シートの反射面側に設置され、１より大きい屈折率を有するプリズムシートと、
第１の軸方向に延びる角柱形状であって、前記プリズムシートに対して前記反射シートとは反対側に設置され、１より大きい屈折率を有し、前記第１の軸方向に直交する第２の軸方向に配列される複数のプリズムアレイと、
前記プリズムシートの内部で前記プリズムアレイに対応して前記第２の軸方向に配列され、光を遮蔽する複数の遮蔽部と、
を備える
ことを特徴とする。 The panel member according to the present invention that achieves the above object is
A reflection sheet on which a reflection surface that reflects light is formed on at least one of the surfaces;
A prism sheet installed on the reflective surface side of the reflective sheet and having a refractive index greater than 1,
A prismatic shape extending in the first axial direction, and is disposed on the opposite side of the reflecting sheet with respect to the prism sheet, has a refractive index greater than 1, and is perpendicular to the first axial direction. A plurality of prism arrays arranged in the axial direction of
A plurality of shielding portions arranged in the second axial direction corresponding to the prism array inside the prism sheet and shielding light;
It is characterized by providing.

また、本発明にかかるパネル部材では、
前記プリズムアレイは、
前記第１の軸方向と前記第２の軸方向に直交する第３の軸方向と前記第２の軸方向とを含む断面における形状が直角三角形の三角柱であって、
前記第２の軸方向に向かうにつれて前記プリズムシートに近づくように所定の傾斜角度で設置される第１の面と、
前記プリズムシートに対して直角に設置される第２の面と、
を有する
ことを特徴とする。 In the panel member according to the present invention,
The prism array is
The shape in a cross section including the first axial direction, the third axial direction orthogonal to the second axial direction, and the second axial direction is a triangular prism having a right triangle,
A first surface installed at a predetermined inclination angle so as to approach the prism sheet toward the second axial direction;
A second surface installed at a right angle to the prism sheet;
It is characterized by having.

また、本発明にかかるパネル部材では、
前記プリズムシートと前記プリズムアレイは、一体に形成される
ことを特徴とする。 In the panel member according to the present invention,
The prism sheet and the prism array are integrally formed.

また、本発明にかかるパネル部材では、
前記遮蔽部は、前記プリズムシートの内部において、前記第２の方向に向かうにつれて前記反射面から離れるように傾斜して設置される
ことを特徴とする。 In the panel member according to the present invention,
The shielding portion is installed inside the prism sheet so as to be inclined away from the reflecting surface as it goes in the second direction.

また、本発明にかかるパネル部材は、
前記プリズムアレイから入射する入射光及び前記反射シートで反射する反射光が以下の条件式（１）及び（２）を満足する
ことを特徴とする。
ｈ／tanθ2 ＋Ｈ／tanθ2 ＞Ｄ（１）
θs ＜ θ2 （＝９０°＋θ1 −θp ）（２）
ここで、
θ2 ＝９０°＋θ1 −θp 、
sinθ1 ＝（ｎ0 ／ｎ1 ）sinθ0 、
Ｈ＝Ｓtanθs 、
である。
ただし、
θ0 は、前記入射光と前記プリズムアレイの前記斜面の法線がなす角度（境界条件：前記入射光と前記反射面のなす角度が９０°）、
θ1 は、前記斜面から前記プリズムシートに入射した前記入射光と前記斜面の法線がなす角度、
θ2 は、前記プリズムシートに入射した前記入射光が前記反射面で反射する角度、
θp は、前記斜面と前記反射面がなす角度、
θs は、前記遮蔽部と前記反射面がなす角度、
ｈは、前記プリズムシートの厚み、
Ｓは、前記遮蔽部の長さ、
Ｈは、前記遮蔽部の端点から前記反射面までの距離、
Ｄは、前記プリズムアレイの間隔及び前記遮光部の間隔、
ｎ0 は、空気の屈折率、
ｎ1 は、前記プリズムシート及び前記プリズムアレイの屈折率、
である。 Moreover, the panel member concerning this invention is
The incident light incident from the prism array and the reflected light reflected by the reflecting sheet satisfy the following conditional expressions (1) and (2).
h / tanθ2 + H / tanθ2> D (1)
θs <θ2 (= 90 ° + θ1-θp) (2)
here,
θ2 = 90 ° + θ1−θp,
sinθ1 = (n0 / n1) sinθ0,
H = Stanθs,
It is.
However,
θ0 is an angle formed by the incident light and a normal line of the inclined surface of the prism array (boundary condition: an angle formed by the incident light and the reflecting surface is 90 °),
θ1 is an angle formed by the incident light incident on the prism sheet from the inclined surface and the normal of the inclined surface,
θ2 is an angle at which the incident light incident on the prism sheet is reflected by the reflecting surface,
θp is the angle formed by the slope and the reflecting surface,
θs is an angle formed by the shielding portion and the reflecting surface,
h is the thickness of the prism sheet,
S is the length of the shielding part,
H is the distance from the end point of the shielding part to the reflecting surface,
D is an interval between the prism arrays and an interval between the light shielding portions,
n0 is the refractive index of air,
n1 is the refractive index of the prism sheet and the prism array,
It is.

本発明によれば、所定の角度から入射する光を遮り、該光が射出することによって生じる光害を抑制するパネル部材を提供することが可能となる。 ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the panel member which interrupts the light which injects from a predetermined angle, and suppresses the light damage which arises when this light inject | emits.

本実施形態のパネル部材１の概略斜視図を示す。The schematic perspective view of the panel member 1 of this embodiment is shown. 本実施形態のパネル部材１の断面の一部を示す。A part of section of panel member 1 of this embodiment is shown. 本実施形態のパネル部材１の遮蔽部５の設置方法を示す。The installation method of the shielding part 5 of the panel member 1 of this embodiment is shown. 本実施形態のパネル部材１と入射光Ｌ及び反射光Ｌｒ、並びに各パラメーターを示す。The panel member 1 of this embodiment, the incident light L, the reflected light Lr, and each parameter are shown.

以下、図面を参照にして本発明にかかるパネル部材について説明する。 Hereinafter, a panel member according to the present invention will be described with reference to the drawings.

図１は、本実施形態のパネル部材１の概略斜視図を示す。図２は、本実施形態のパネル部材１の断面の一部を示す。なお、図１における第１方向Ｘ、第２方向Ｙ、及び第３方向Ｚは、それぞれ第１の軸方向、第２の軸方向、及び第３の軸方向に対応する。 FIG. 1 is a schematic perspective view of the panel member 1 of the present embodiment. FIG. 2 shows a part of a cross section of the panel member 1 of the present embodiment. Note that the first direction X, the second direction Y, and the third direction Z in FIG. 1 correspond to the first axial direction, the second axial direction, and the third axial direction, respectively.

本実施形態のパネル部材１は、本実施形態のパネル部材１は、少なくとも一方に光を反射させる反射面２ａが形成された反射シート２と、反射シート２の反射面２ａ側に設置され、１より大きい屈折率を有するプリズムシート３と、Ｘ軸方向に延びる角柱形状であって、プリズムシート３に対して反射シート２とは反対側に設置され、１より大きい屈折率を有し、Ｘ軸方向に直交するＹ軸方向に配列される複数のプリズムアレイ４と、プリズムシート３の内部でプリズムアレイ４に対応してＹ軸方向に配列され、光を遮蔽する複数の遮蔽部５と、を備える。 The panel member 1 of the present embodiment is installed on the reflective surface 2a side of the reflective sheet 2 on which the reflective surface 2a for reflecting light is formed on at least one of the panel members 1 of the present embodiment. A prism sheet 3 having a larger refractive index and a prismatic shape extending in the X-axis direction, and disposed on the opposite side of the reflecting sheet 2 with respect to the prism sheet 3 and having a refractive index larger than 1, the X-axis A plurality of prism arrays 4 arranged in the Y-axis direction orthogonal to the direction, and a plurality of shielding portions 5 arranged in the Y-axis direction corresponding to the prism array 4 inside the prism sheet 3 and shielding light. Prepare.

反射シート２は、プリズムシート３側に反射面２ａを有し、第１方向Ｘ及び第２方向Ｙを含む平面で広がる部材であって、薄いフィルム状の部材でも、多少厚みのある板状の部材でもよい。また、反射シート２は、入射した光をすべて反射させる必要はなく、一部を透過し、一部を反射させる構造でもよい。例えば、太陽電池等の機能を有するものでもよい。 The reflection sheet 2 is a member that has a reflection surface 2a on the prism sheet 3 side and spreads in a plane including the first direction X and the second direction Y, and even a thin film-like member has a somewhat thick plate shape. It may be a member. Moreover, the reflection sheet 2 does not need to reflect all the incident light, and may have a structure in which a part is transmitted and a part is reflected. For example, what has functions, such as a solar cell, may be used.

プリズムシート３は、屈折率が１より大きい材料からなり、第１方向Ｘ及び第２方向Ｙを含む平面で広がる部材であって、薄いフィルム状の部材でも、多少厚みのある板状の部材でもよい。プリズムシート３は、反射シート２の反射面側に設置される。 The prism sheet 3 is made of a material having a refractive index larger than 1, and is a member that spreads in a plane including the first direction X and the second direction Y. The prism sheet 3 may be a thin film-like member or a somewhat thick plate-like member. Good. The prism sheet 3 is installed on the reflection surface side of the reflection sheet 2.

プリズムシート３は、反射シート２とは反対側に複数のプリズムアレイ４を有する。複数のプリズムアレイ４は、図２に示すように、第１方向Ｘと第２方向Ｙに直交する第３方向Ｚと第２方向Ｙとを含む鉛直断面が直角三角形の三角柱であって、第１の面としての斜面４ａを反射シート２とは反対側に向け、直角部分が下方に設置される。すなわち、プリズムアレイ４の斜面４ａは、第２方向Ｙに向かうにつれてプリズムシート３に近づくように所定の傾斜角度で設置され、プリズムアレイ４の第２の面としての底面４ｂは、プリズムシート３に対して直角に設置される。なお、プリズムシート３とプリズムアレイ４は、一体に形成されてもよい。 The prism sheet 3 has a plurality of prism arrays 4 on the side opposite to the reflection sheet 2. As shown in FIG. 2, the plurality of prism arrays 4 are triangular prisms having a vertical cross section including a third direction Z and a second direction Y perpendicular to the first direction X and the second direction Y, The inclined surface 4a as a surface of 1 is directed to the side opposite to the reflection sheet 2, and the right-angled portion is installed below. That is, the inclined surface 4 a of the prism array 4 is installed at a predetermined inclination angle so as to approach the prism sheet 3 in the second direction Y, and the bottom surface 4 b as the second surface of the prism array 4 is formed on the prism sheet 3. It is installed at a right angle to it. The prism sheet 3 and the prism array 4 may be integrally formed.

遮蔽部５は、光を反射せず、遮蔽する細長い長方形状の部材であって、薄いフィルム状の部材でも、多少厚みのある板状の部材でもよい。遮蔽部５は、プリズムシート３の内部において、第２方向Ｙに向かうにつれて反射面２ａから離れるように傾斜して設置される。本実施形態の遮蔽部５は、上方に向かうにつれて反射シート２から離れ、プリズムアレイ４に近づくように傾斜して設置される。 The shielding part 5 is an elongated rectangular member that does not reflect light and shields it, and may be a thin film member or a plate member having a certain thickness. The shielding part 5 is installed inside the prism sheet 3 so as to be inclined away from the reflecting surface 2a in the second direction Y. The shielding unit 5 of the present embodiment is installed so as to be separated from the reflection sheet 2 and approach the prism array 4 as it goes upward.

図３は、本実施形態のパネル部材１の遮蔽部５の設置方法を示す。 FIG. 3 shows the installation method of the shielding part 5 of the panel member 1 of this embodiment.

まず、図３（ａ）に示すように、透明樹脂を成型することにより、プリズムシート３の元となる成型物３０を成型する。成型は、熱溶融押出加工や射出成型等を採用することができる。得られた成型物３０はプリズムシート３のうち、遮蔽部５が設置される部分が切欠部３１として削り取られた形状となっている。本実施形態のパネル部材１では、切欠部３１は、一例として直角三角形に形成される。 First, as shown to Fig.3 (a), the molding 30 used as the origin of the prism sheet 3 is shape | molded by shape | molding transparent resin. For the molding, hot-melt extrusion processing, injection molding, or the like can be employed. The obtained molded product 30 has a shape in which the portion of the prism sheet 3 where the shielding part 5 is installed is cut off as the notch 31. In the panel member 1 of this embodiment, the notch part 31 is formed in a right triangle as an example.

続いて、図３（ｂ）に示すように、成型物３０の切欠部３１内の斜辺３１ａに、一例としてインクジェット印刷等によって遮蔽部５を形成する。なお、インクジェット印刷に限らず、シート状、フィルム状、又は板状の部材を遮蔽部５として切欠部３１内の斜辺３１ａに設置してもよい。 Subsequently, as shown in FIG. 3B, the shielding portion 5 is formed on the hypotenuse 31a in the cutout portion 31 of the molded product 30 by, for example, ink jet printing. In addition, not only inkjet printing but a sheet-like, film-like, or plate-like member may be installed on the oblique side 31 a in the notch 31 as the shielding part 5.

続いて、図３（ｃ）に示すように、成型物３０の切欠部３１に液状の透明樹脂を充填する。その後、透明樹脂を固化させることにより、プリズムシート３を作製することができる。最後に、プリズムシート３に反射シート２を接合させることによって、図１に示すようにパネル部材１が完成する。 Subsequently, as shown in FIG. 3 (c), a liquid transparent resin is filled into the notch 31 of the molded product 30. Thereafter, the prism sheet 3 can be produced by solidifying the transparent resin. Finally, the reflective sheet 2 is joined to the prism sheet 3 to complete the panel member 1 as shown in FIG.

次に、反射光Ｌｒが遮光部５で遮光される条件と各パラメーターの定義を説明する。 Next, the conditions under which the reflected light Lr is shielded by the light shielding unit 5 and the definition of each parameter will be described.

図４は、パネル部材１と入射光Ｌ及び反射光Ｌｒ、並びに各パラメーターを示す。 FIG. 4 shows the panel member 1, the incident light L, the reflected light Lr, and each parameter.

図４に示すように、入射光Ｌは、斜面４ａからプリズムアレイ４に入射し、プリズムアレイ４を透過して、プリズムシート３に入射し、プリズムシート３を透過して反射シート２の反射面２ａで反射する。この反射面２ａで反射した反射光Ｌｒが遮光部５で遮光されるためには、パネル部材１と入射光Ｌ及び反射光Ｌｒの関係が以下の条件式（１）及び（２）を満足することが好ましい。
ｈ／tanθ2 ＋Ｈ／tanθ2 ＞Ｄ（１）
θs ＜ θ2 （＝９０°＋θ1 −θp ）（２）
ここで、
θ2 ＝９０°＋θ1 −θp 、
sinθ1 ＝（ｎ0 ／ｎ1 ）sinθ0 、
Ｈ＝Ｓtanθs 、
である。
ただし、
θ0 は、入射光Ｌとプリズムアレイ４の斜面４ａの法線Ｎがなす角度（境界条件：入射光Ｌと反射面２ａのなす角度が９０°）、
θ1 は、斜面４ａからプリズムシート３に入射した入射光Ｌと斜面４ａの法線Ｎがなす角度、
θ2 は、プリズムシート３に入射した入射光Ｌが反射面２ａで反射する角度、
θp は、斜面４ａと反射面２ａがなす角度、
θs は、遮蔽部５と反射面２ａがなす角度、
ｈは、プリズムシート３の厚み、
Ｓは、遮蔽部５の長さ、
Ｈは、遮蔽部５の端点５ａから反射面２ａまでの距離、
Ｄは、プリズムアレイ４の間隔及び遮光部５の間隔、
ｎ0 は、空気の屈折率、
ｎ1 は、プリズムシート３及びプリズムアレイ４の屈折率、
である。 As shown in FIG. 4, incident light L enters the prism array 4 from the inclined surface 4 a, passes through the prism array 4, enters the prism sheet 3, passes through the prism sheet 3, and reflects the reflecting surface of the reflecting sheet 2. Reflected at 2a. In order for the reflected light Lr reflected by the reflecting surface 2a to be shielded by the light shielding portion 5, the relationship between the panel member 1, the incident light L, and the reflected light Lr satisfies the following conditional expressions (1) and (2). It is preferable.
h / tanθ2 + H / tanθ2> D (1)
θs <θ2 (= 90 ° + θ1-θp) (2)
here,
θ2 = 90 ° + θ1−θp,
sinθ1 = (n0 / n1) sinθ0,
H = Stanθs,
It is.
However,
θ0 is an angle formed by the incident light L and the normal N of the inclined surface 4a of the prism array 4 (boundary condition: an angle formed by the incident light L and the reflecting surface 2a is 90 °),
θ1 is an angle formed between the incident light L incident on the prism sheet 3 from the inclined surface 4a and the normal line N of the inclined surface 4a,
θ2 is an angle at which the incident light L incident on the prism sheet 3 is reflected by the reflecting surface 2a,
θp is an angle formed by the inclined surface 4a and the reflecting surface 2a,
θs is an angle formed by the shielding portion 5 and the reflecting surface 2a,
h is the thickness of the prism sheet 3,
S is the length of the shielding part 5,
H is the distance from the end point 5a of the shielding part 5 to the reflecting surface 2a,
D is the interval between the prism arrays 4 and the interval between the light shielding portions 5,
n0 is the refractive index of air,
n1 is the refractive index of the prism sheet 3 and the prism array 4;
It is.

例えば、条件式（１）及び（２）を満足していれば、図４に示すように、反射面２ａに直交する線から仰角９０°の第１の範囲Ａから入射光Ｌが入射した場合、反射光Ｌｒは、遮蔽部５で遮光される。したがって、反射面２ａに直交する線から俯角９０°の第２の範囲Ｂへ反射光Ｌｒが反射することがなく、太陽光の反射を遮り、下方から観察する際の太陽光による光害を抑制することが可能となる。 For example, if the conditional expressions (1) and (2) are satisfied, as shown in FIG. 4, the incident light L is incident from the first range A at an elevation angle of 90 ° from the line orthogonal to the reflecting surface 2a. The reflected light Lr is shielded by the shield 5. Therefore, the reflected light Lr is not reflected from the line perpendicular to the reflecting surface 2a to the second range B having a depression angle of 90 °, so that the reflection of sunlight is blocked and the light damage caused by sunlight when observing from below is suppressed. It becomes possible to do.

以上、本実施形態のパネル部材１は、少なくとも一方に光を反射させる反射面２ａが形成された反射シート２と、反射シート２の反射面２ａ側に設置され、１より大きい屈折率を有するプリズムシート３と、第１方向Ｘに延びる角柱形状であって、プリズムシート３に対して反射シート２とは反対側に設置され、１より大きい屈折率を有し、第１方向Ｘに直交する第２方向Ｙに配列される複数のプリズムアレイ４と、プリズムシート３の内部でプリズムアレイ４に対応して第２方向Ｙに配列され、光を遮蔽する複数の遮蔽部５と、を備えるので、所定の角度から入射する光を遮り、該光が射出することによって生じる光害を抑制することが可能となる。 As described above, the panel member 1 according to the present embodiment includes the reflection sheet 2 formed with the reflection surface 2a that reflects light on at least one side, and the prism that is installed on the reflection surface 2a side of the reflection sheet 2 and has a refractive index greater than 1. The prism 3 has a prismatic shape extending in the first direction X and is disposed on the opposite side of the reflecting sheet 2 with respect to the prism sheet 3 and has a refractive index greater than 1 and is perpendicular to the first direction X. Since the plurality of prism arrays 4 arranged in the two directions Y and the plurality of shielding portions 5 arranged in the second direction Y corresponding to the prism arrays 4 inside the prism sheet 3 and shielding light, It is possible to block light incident from a predetermined angle and suppress light damage caused by the emission of the light.

また、本実施形態のパネル部材１は、プリズムアレイ４は、第１方向Ｘと第２方向Ｙに直交する第３方向Ｚと第２方向Ｙとを含む断面における形状が直角三角形の三角柱であって、第２方向Ｙに向かうにつれてプリズムシート３に近づくように所定の傾斜角度で設置される斜面４ａと、プリズムシート３に対して直角に設置される底面４ｂと、を有するので、鉛直方向の上方からの光を反射面２ａに到達させることが可能となる。 Further, in the panel member 1 of the present embodiment, the prism array 4 is a triangular prism whose shape in a cross section including the third direction Z and the second direction Y orthogonal to the first direction X and the second direction Y is a right triangle. In addition, since it has a slope 4a installed at a predetermined inclination angle so as to approach the prism sheet 3 toward the second direction Y and a bottom surface 4b installed at a right angle to the prism sheet 3, Light from above can reach the reflecting surface 2a.

また、本実施形態のパネル部材１は、プリズムシート３とプリズムアレイ４は、一体に形成されるので、界面による影響を低減させることが可能となる。 Further, in the panel member 1 of the present embodiment, the prism sheet 3 and the prism array 4 are integrally formed, so that the influence of the interface can be reduced.

また、本実施形態のパネル部材１では、遮蔽部５は、プリズムシート３の内部において、第２方向Ｙに向かうにつれて反射面２ａから離れるように傾斜して設置されるので、鉛直方向の上方から入射し、反射面２ａで反射した光を遮蔽することが可能となる。 Moreover, in the panel member 1 of this embodiment, since the shielding part 5 is installed in the prism sheet 3 so as to be separated from the reflecting surface 2a toward the second direction Y, the shielding part 5 is viewed from above in the vertical direction. It is possible to shield the incident light reflected by the reflecting surface 2a.

また、本実施形態のパネル部材１は、プリズムアレイ４から入射する入射光及び反射シート２で反射する反射光が以下の条件式（１）及び（２）を満足するので、反射面２ａに直交する線から仰角９０°の第１の範囲Ａから入射光Ｌが入射した場合、反射光Ｌｒは、遮蔽部５で遮光される。したがって、反射面２ａに直交する線から俯角９０°の第２の範囲Ｂへ反射光Ｌｒが反射することがなく、太陽光の反射を遮り、下方から観察する際の太陽光による光害を抑制することが可能となる。
ｈ／tanθ2 ＋Ｈ／tanθ2 ＞Ｄ（１）
θs ＜ θ2 （＝９０°＋θ1 −θp ）（２）
ここで、
θ2 ＝９０°＋θ1 −θp 、
sinθ1 ＝（ｎ0 ／ｎ1 ）sinθ0 、
Ｈ＝Ｓtanθs 、
である。
ただし、
θ0 は、前記入射光と前記プリズムアレイの前記斜面の法線がなす角度（境界条件：前記入射光と前記反射面のなす角度が９０°）、
θ1 は、前記斜面から前記プリズムシートに入射した前記入射光と前記斜面の法線がなす角度、
θ2 は、前記プリズムシートに入射した前記入射光が前記反射面で反射する角度、
θp は、前記斜面と前記反射面がなす角度、
θs は、前記遮蔽部と前記反射面がなす角度、
ｈは、前記プリズムシートの厚み、
Ｓは、前記遮蔽部の長さ、
Ｈは、前記遮蔽部の端点から前記反射面までの距離、
Ｄは、前記プリズムアレイの間隔及び前記遮光部の間隔、
ｎ0 は、空気の屈折率、
ｎ1 は、前記プリズムシート及び前記プリズムアレイの屈折率、
である。 Further, in the panel member 1 according to the present embodiment, the incident light incident from the prism array 4 and the reflected light reflected by the reflection sheet 2 satisfy the following conditional expressions (1) and (2). When the incident light L enters from the first range A having an elevation angle of 90 ° from the line to be reflected, the reflected light Lr is shielded by the shielding unit 5. Therefore, the reflected light Lr is not reflected from the line perpendicular to the reflecting surface 2a to the second range B having a depression angle of 90 °, so that the reflection of sunlight is blocked and the light damage caused by sunlight when observing from below is suppressed. It becomes possible to do.
h / tanθ2 + H / tanθ2> D (1)
θs <θ2 (= 90 ° + θ1-θp) (2)
here,
θ2 = 90 ° + θ1−θp,
sinθ1 = (n0 / n1) sinθ0,
H = Stanθs,
It is.
However,
θ0 is an angle formed by the incident light and a normal line of the inclined surface of the prism array (boundary condition: an angle formed by the incident light and the reflecting surface is 90 °),
θ1 is an angle formed by the incident light incident on the prism sheet from the inclined surface and the normal of the inclined surface,
θ2 is an angle at which the incident light incident on the prism sheet is reflected by the reflecting surface,
θp is the angle formed by the slope and the reflecting surface,
θs is an angle formed by the shielding portion and the reflecting surface,
h is the thickness of the prism sheet,
S is the length of the shielding part,
H is the distance from the end point of the shielding part to the reflecting surface,
D is an interval between the prism arrays and an interval between the light shielding portions,
n0 is the refractive index of air,
n1 is the refractive index of the prism sheet and the prism array,
It is.

以上、パネル部材１をいくつかの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組み合わせ又は変形が可能である。 As mentioned above, although the panel member 1 has been demonstrated based on some Examples, this invention is not limited to these Examples, A various combination or deformation | transformation is possible.

１…パネル部材
２…反射シート
３…プリズムシート
４…プリズムアレイ
５…遮蔽部 DESCRIPTION OF SYMBOLS 1 ... Panel member 2 ... Reflective sheet 3 ... Prism sheet 4 ... Prism array 5 ... Shielding part

Claims

A reflection sheet on which a reflection surface that reflects light is formed on at least one of the surfaces;
A prism sheet installed on the reflective surface side of the reflective sheet and having a refractive power greater than 1,
A prismatic shape extending in the first axial direction, and is disposed on the opposite side of the reflective sheet with respect to the prism sheet, has a refractive power greater than 1, and is perpendicular to the first axial direction. A plurality of prism arrays arranged in the axial direction of
A plurality of shielding portions arranged in the second axial direction corresponding to the prism array inside the prism sheet and shielding light;
A panel member comprising:

The prism array is
The shape in a cross section including the first axial direction, the third axial direction orthogonal to the second axial direction, and the second axial direction is a triangular prism having a right triangle,
A first surface installed at a predetermined inclination angle so as to approach the prism sheet toward the second axial direction;
A second surface installed at a right angle to the prism sheet;
The panel member according to claim 1, comprising:

The panel member according to claim 1, wherein the prism sheet and the prism array are integrally formed.

The said shielding part is installed in the inside of the said prism sheet, inclining so that it may leave | separate from the said reflective surface as it goes to the said 2nd direction. Panel member.

5. The incident light incident from the prism array and the reflected light reflected by the reflecting sheet satisfy the following conditional expressions (1) and (2): 5. Panel member.
h / tanθ2 + H / tanθ2> D (1)
θs <θ2 (= 90 ° + θ1-θp) (2)
here,
θ2 = 90 ° + θ1−θp,
sinθ1 = (n0 / n1) sinθ0,
H = Stanθs,
It is.
However,
θ0 is an angle formed by the incident light and a normal line of the inclined surface of the prism array (boundary condition: an angle formed by the incident light and the reflecting surface is 90 °),
θ1 is an angle formed by the incident light incident on the prism sheet from the inclined surface and the normal of the inclined surface,
θ2 is an angle at which the incident light incident on the prism sheet is reflected by the reflecting surface,
θp is the angle formed by the slope and the reflecting surface,
θs is an angle formed by the shielding portion and the reflecting surface,
h is the thickness of the prism sheet,
S is the length of the shielding part,
H is the distance from the end point of the shielding part to the reflecting surface,
D is an interval between the prism arrays and an interval between the light shielding portions,
n0 is the refractive index of air,
n1 is the refractive index of the prism sheet and the prism array,
It is.