JP6900673B2

JP6900673B2 - Dimming member

Info

Publication number: JP6900673B2
Application number: JP2016254350A
Authority: JP
Inventors: 誠山木; 川島　朋也; 朋也川島
Original assignee: Dai Nippon Printing Co Ltd
Current assignee: Dai Nippon Printing Co Ltd
Priority date: 2016-12-27
Filing date: 2016-12-27
Publication date: 2021-07-07
Anticipated expiration: 2036-12-27
Also published as: JP2018105055A

Description

本発明は調光部材に関する。 The present invention relates to a dimming member.

従来、例えば窓に貼り付けて外来光の透過を制御する調光部材に関する工夫が種々に提案されている（特許文献１、２）。このような調光部材の１つに、液晶を利用したものがある。液晶を利用した調光部材は、透明電極を作製した透明基材によって液晶層を挟持して液晶セルが作製され、この液晶セルを直線偏光板により挟持して作成される。そして、液晶に印加する電界を変化させることにより液晶の配向を変化させて外来光の透過が制御される。
このような調光部材は、液晶層に二色性色素を加えて、ゲストホスト方式により駆動してもよく、この場合、直線偏光板は省略することが可能である。 Conventionally, various devices have been proposed for dimming members that are attached to windows to control the transmission of external light (Patent Documents 1 and 2). One of such dimming members uses a liquid crystal. A dimming member using a liquid crystal is produced by sandwiching a liquid crystal layer with a transparent base material on which a transparent electrode is produced to produce a liquid crystal cell, and sandwiching the liquid crystal cell with a linear polarizing plate. Then, by changing the electric field applied to the liquid crystal, the orientation of the liquid crystal is changed and the transmission of external light is controlled.
Such a dimming member may be driven by a guest host method by adding a dichroic dye to the liquid crystal layer, and in this case, the linear polarizing plate can be omitted.

特開平０３−４７３９２号公報Japanese Unexamined Patent Publication No. 03-47392 特開平０８−１８４２７３号公報Japanese Unexamined Patent Publication No. 08-184273

しかし、ゲストホスト方式を採用して直線偏光板を省略すると、液晶層には直線偏光板を介さずに外光が入射する。そうすると、液晶を配向させる配向膜、液晶及び／又は二色性色素が劣化する可能性がある。
本発明は、配向膜、液晶及び／又は二色性色素等の劣化が生じにくい調光部材を提供することを目的とする。 However, if the guest host method is adopted and the linear polarizing plate is omitted, external light is incident on the liquid crystal layer without passing through the linear polarizing plate. Then, the alignment film that orients the liquid crystal, the liquid crystal, and / or the dichroic dye may be deteriorated.
An object of the present invention is to provide a dimming member in which deterioration of an alignment film, a liquid crystal and / or a dichroic dye is unlikely to occur.

上記課題を解決するために、本発明は以下のものを提供する。
（１）第１透明電極と、第２透明電極と、液晶材料及び二色性色素を含み、前記第１透明電極と前記第２透明電極との間の電位差によって光の透過率が変動する液晶層と、前記液晶層の少なくとも一方の側に配置され、且つ紫外線を吸収する透明基材と、を含む調光部材。 In order to solve the above problems, the present invention provides the following.
(1) A liquid crystal containing a first transparent electrode, a second transparent electrode, a liquid crystal material, and a dichroic dye, and the light transmittance varies depending on the potential difference between the first transparent electrode and the second transparent electrode. A dimming member including a layer and a transparent base material arranged on at least one side of the liquid crystal layer and absorbing ultraviolet rays.

（２）（１）において、前記透明基材が、芳香族ポリエステル材料で形成されている調光部材。 (2) In (1), the dimming member in which the transparent base material is made of an aromatic polyester material.

（３）（１）または（２）において、前記透明基材が、３１３ｎｍの紫外線を吸収する調光部材。 (3) In (1) or (2), the dimming member in which the transparent base material absorbs ultraviolet rays of 313 nm.

（４）（１）から（３）のいずれかにおいて、前記液晶層には、該液晶層の間隔を規定する、光硬化型樹脂で製造されたスペーサが設けられ、前記透明基材は、前記光硬化型樹脂を硬化させる紫外線を透過する調光部材。 (4) In any of (1) to (3), the liquid crystal layer is provided with a spacer made of a photocurable resin that defines the spacing between the liquid crystal layers, and the transparent base material is the transparent base material. A dimming member that transmits ultraviolet rays that cures photocurable resins.

（５）（１）から（４）のいずれかにおいて、前記透明基材が、ポリエチレンテレフタレートで製造されている調光部材。 (5) In any of (1) to (4), the dimming member in which the transparent base material is made of polyethylene terephthalate.

（６）（１）または（２）において、前記透明基材が、ポリエチレンナフタレートで製造されている調光部材。 (6) In (1) or (2), the dimming member in which the transparent base material is made of polyethylene naphthalate.

（７）（１）から（６）のいずれかにおいて、前記第１透明電極又は前記第２透明電極は、前記透明基材に形成されている調光部材。 (7) In any of (1) to (6), the first transparent electrode or the second transparent electrode is a dimming member formed on the transparent base material.

（８）（１）から（６）のいずれかにおいて、前記透明基材は、記第１透明電極又は前記第２透明電極が形成された基材よりも外側に配置されている調光部材。 (8) In any of (1) to (6), the transparent base material is a dimming member arranged outside the base material on which the first transparent electrode or the second transparent electrode is formed.

（９）（１）から（８）のいずれかにおいて、前記透明基材よりも外側に防湿層を備える調光部材。 (9) In any of (1) to (8), a dimming member having a moisture-proof layer on the outside of the transparent base material.

（１０）（１）から（９）のいずれかにおいて、前記透明基材よりも外側に赤外線カットフィルムを備える調光部材。 (10) In any one of (1) to (9), a dimming member provided with an infrared cut film on the outside of the transparent base material.

本発明によると、配向膜、液晶及び／又は二色性色素等の劣化が生じにくい調光部材を提供することができる。 According to the present invention, it is possible to provide a dimming member in which deterioration of an alignment film, a liquid crystal and / or a dichroic dye is unlikely to occur.

本発明の第１実施形態に係る調光部材１を示す断面図である。It is sectional drawing which shows the dimming member 1 which concerns on 1st Embodiment of this invention. ＰＥＴの吸収スペクトルを示す図である。It is a figure which shows the absorption spectrum of PET. 調光部材に紫外線を照射した後の画像で、（ａ）は本実施形態、（ｂ）及び（ｃ）は比較形態である。In the image after irradiating the dimming member with ultraviolet rays, (a) is the present embodiment, and (b) and (c) are comparative forms. 本発明の第２実施形態に係る調光部材２０１を示す概略断面図である。It is a schematic cross-sectional view which shows the dimming member 201 which concerns on 2nd Embodiment of this invention. 本発明の第３実施形態に係る調光部材３０１を示す概略断面図である。It is a schematic sectional drawing which shows the dimming member 301 which concerns on 3rd Embodiment of this invention. 本発明の第４実施形態に係る調光部材４０１を示す概略断面図である。It is the schematic sectional drawing which shows the dimming member 401 which concerns on 4th Embodiment of this invention. 本発明の第５実施形態に係る調光部材５０１を示す概略断面図である。It is a schematic cross-sectional view which shows the dimming member 501 which concerns on 5th Embodiment of this invention. 本発明の第６実施形態に係る調光部材６０１を示す概略断面図である。It is a schematic cross-sectional view which shows the dimming member 601 which concerns on 6th Embodiment of this invention. 本発明の第７実施形態に係る調光部材７０１を示す概略断面図である。It is a schematic cross-sectional view which shows the dimming member 701 which concerns on 7th Embodiment of this invention. 本発明の第８実施形態に係る調光部材８０１を示す概略断面図である。It is a schematic cross-sectional view which shows the dimming member 801 which concerns on 8th Embodiment of this invention. 本発明の第９実施形態に係る調光部材９０１を示す概略断面図である。It is a schematic cross-sectional view which shows the dimming member 901 which concerns on 9th Embodiment of this invention. 本発明の第１０実施形態に係る調光部材１００１を示す概略断面図である。It is a schematic cross-sectional view which shows the dimming member 1001 which concerns on 10th Embodiment of this invention. 本発明の第１１実施形態に係る調光部材１１０１を示す概略断面図である。It is a schematic cross-sectional view which shows the dimming member 1101 which concerns on 11th Embodiment of this invention.

（調光部材の構成）
図１は、本発明の第１実施形態に係る調光部材１を示す断面図である。調光部材１は、例えば、建築物の窓ガラス、ショーケース、屋内の透明パーテーション、車両のサンルーフ等の調光を図る部位に、粘着剤層等により貼り付けて使用され、電圧を変化させて透過光を制御する。 (Structure of dimming member)
FIG. 1 is a cross-sectional view showing a dimming member 1 according to the first embodiment of the present invention. The dimming member 1 is used by being attached with an adhesive layer or the like to a dimming part such as a window glass of a building, a showcase, an indoor transparent partition, or a sunroof of a vehicle, and changes the voltage. Control transmitted light.

調光部材１は、フィルム状の第１積層体５Ｄと第２積層体５Ｕとで液晶層８を挟持し、液晶層８への電界を変化させて透過光を制御するゲストホスト方式による調光部材１である。
第１積層体５Ｄは、透明フィルム材である第１透明基材６に、第１透明電極１１、スペーサ１２及び第１配向膜１３が配置されて形成されている。第２積層体５Ｕは、透明フィルム材である第２透明基材１５に、第２透明電極１６及び第２配向膜１７が配置されて形成されている。
第２積層体５Ｕ及び第１積層体５Ｄに設けられた第１透明電極１１及び第２透明電極１６の駆動により、液晶層８内の電界の強さが変化する。 The dimming member 1 is dimmed by a guest host method in which the liquid crystal layer 8 is sandwiched between the film-shaped first laminated body 5D and the second laminated body 5U, and the electric field to the liquid crystal layer 8 is changed to control the transmitted light. It is a member 1.
The first laminated body 5D is formed by arranging a first transparent electrode 11, a spacer 12, and a first alignment film 13 on a first transparent base material 6, which is a transparent film material. The second laminated body 5U is formed by arranging a second transparent electrode 16 and a second alignment film 17 on a second transparent base material 15 which is a transparent film material.
The strength of the electric field in the liquid crystal layer 8 is changed by driving the first transparent electrode 11 and the second transparent electrode 16 provided on the second laminated body 5U and the first laminated body 5D.

（基材）
第１透明基材６及び第２透明基材１５については、後に説明する。 (Base material)
The first transparent base material 6 and the second transparent base material 15 will be described later.

（透明電極）
第１透明電極１１及び第２透明電極１６は、この種のフィルム材に適用される各種の電極材料を適用することができ、本実施形態ではＩＴＯ（ＩｎｄｉｕｍＴｉｎＯｘｉｄｅ）による透明電極材により形成される。 (Transparent electrode)
Various electrode materials applied to this kind of film material can be applied to the first transparent electrode 11 and the second transparent electrode 16, and in the present embodiment, the first transparent electrode 11 and the second transparent electrode 16 are formed of a transparent electrode material made of ITO (Indium Tin Oxide). To.

（スペーサ）
スペーサ１２は、液晶層８の厚みを規定するために設けられ、各種の樹脂材料を広く適用することができるが、本実施形態ではフォトレジストにより作製され、第１透明電極１１が作製された第１透明基材６の上に、フォトレジストを塗工して露光、現像することにより作製される。
なおスペーサ１２は、第２積層体５Ｕに設けてもよく、第２積層体５Ｕ及び第１積層体５Ｄの双方に設けてもよい。またスペーサ１２は、いわゆるビーズスペーサを適用してもよい。 (Spacer)
The spacer 12 is provided to define the thickness of the liquid crystal layer 8, and various resin materials can be widely applied. However, in the present embodiment, the spacer 12 is made of a photoresist and the first transparent electrode 11 is made. 1 It is produced by coating a photoresist on a transparent base material 6, exposing and developing it.
The spacer 12 may be provided on the second laminated body 5U, or may be provided on both the second laminated body 5U and the first laminated body 5D. Further, a so-called bead spacer may be applied to the spacer 12.

（配向膜）
第１配向膜１３及び第２配向膜１７は、液晶層８に係る液晶材料に対して配向規制力を発現可能な各種の構成を適用することができる。本実施形態では光配向膜により作製するが、ラビング処理、研磨処理による微細なライン状凹凸形状を賦型処理により作製して形成してもよい。 (Alignment film)
As the first alignment film 13 and the second alignment film 17, various configurations capable of exhibiting an orientation regulating force can be applied to the liquid crystal material related to the liquid crystal layer 8. In the present embodiment, it is produced by a photoalignment film, but a fine line-shaped uneven shape formed by a rubbing treatment or a polishing treatment may be produced and formed by a shaping treatment.

光配向膜である第１配向膜１３及び第２配向膜１７は、直線偏光紫外線を高分子膜上に照射することによって、偏光方向の高分子鎖を選択的に反応させ、これによって異方性を発生させて液晶配向能を付与することにより形成される。
光配向膜の場合、光配向の手法を適用可能な各種の材料を適用することができるが、本実施形態では二量化型の材料を適用する。この光二量化型の材料については、「Ｍ．Ｓｃｈａｄｔ，Ｋ．Ｓｃｈｍｉｔｔ，Ｖ．ＫｏｚｉｎｋｏｖａｎｄＶ．Ｃｈｉｇｒｉｎｏｖ：Ｊｐｎ．Ｊ．Ａｐｐｌ．Ｐｈｙｓ．，３１，２１５５（１９９２）」、「Ｍ．Ｓｃｈａｄｔ，Ｈ．ＳｅｉｂｅｒｌｅａｎｄＡ．Ｓｃｈｕｓｔｅｒ：Ｎａｔｕｒｅ，３８１，２１２（１９９６）」等に開示されている。 The first alignment film 13 and the second alignment film 17, which are photo-alignment films, selectively react the polymer chains in the polarization direction by irradiating the polymer film with linearly polarized ultraviolet rays, thereby anisotropy. Is formed by giving the liquid crystal alignment ability.
In the case of a photo-alignment film, various materials to which the photo-alignment method can be applied can be applied, but in the present embodiment, a dimerized material is applied. For this photodimerized material, see "M. Schadt, K. Schmitt, V. Kozinkov and V. Chigrinov: Jpn. J. Appl. Phys., 31, 2155 (1992)", "M. Schadt, H. Seeberle and A. Schuster: Nature, 381, 212 (1996) and the like.

（シール材）
調光部材１は、液晶層８を囲むように、シール材１９が配置され、このシール材１９により第２積層体５Ｕ、第１積層体５Ｄが一体に保持され、液晶材料の漏出が防止される。
シール材１９は、本実施形態では光硬化型の材料を用いる。本実施形態において光硬化型の材料は、３２０ｎｍ程度より大きい波長の紫外線で硬化する。 (Seal material)
A sealing material 19 is arranged so as to surround the liquid crystal layer 8 in the dimming member 1, and the second laminated body 5U and the first laminated body 5D are integrally held by the sealing material 19 to prevent leakage of the liquid crystal material. To.
As the sealing material 19, a photocurable material is used in this embodiment. In the present embodiment, the photocurable material is cured by ultraviolet rays having a wavelength larger than about 320 nm.

（液晶層）
液晶層８は、液晶材料と二色性色素とを含みゲストホスト方式で駆動される。
（液晶材料）
液晶材料は、例えばネマティック液晶が用いられる。
（二色性色素）
二色性色素は、分子の長軸方向における吸光度と、短軸方向における吸光度とが異なる色素である。調光部材１に印加される電圧の変化によって、液晶分子の配向状態が変化すると、液晶分子の配向状態の変化に応じて二色性色素の配向状態も変化する。 (Liquid crystal layer)
The liquid crystal layer 8 contains a liquid crystal material and a dichroic dye, and is driven by a guest host method.
(Liquid crystal material)
As the liquid crystal material, for example, nematic liquid crystal is used.
(Dichroic pigment)
A dichroic dye is a dye in which the absorbance in the major axis direction and the absorbance in the minor axis direction of the molecule are different. When the orientation state of the liquid crystal molecules changes due to the change in the voltage applied to the dimming member 1, the orientation state of the dichroic dye also changes according to the change in the orientation state of the liquid crystal molecules.

このようにゲストホスト方式により調光材を作製する場合には、直線偏光板を省略することが可能となる。このため、本実施形態では直線偏光板は配置されていない。しかし、直線偏光板が配置されずに液晶層８に外光が直接到達すると、外光に含まれる紫外線により液晶層８等が劣化し、また、シール材１９を硬化させる紫外線によっても液晶層８等が劣化してしまう可能性がある。 When the light control material is produced by the guest host method in this way, the linear polarizing plate can be omitted. Therefore, the linear polarizing plate is not arranged in this embodiment. However, if the external light directly reaches the liquid crystal layer 8 without the linear polarizing plate being arranged, the liquid crystal layer 8 or the like is deteriorated by the ultraviolet rays contained in the external light, and the liquid crystal layer 8 is also deteriorated by the ultraviolet rays that cure the sealing material 19. Etc. may deteriorate.

そこで、本実施形態では液晶層８を挟持する第１積層体５Ｄの第１透明基材６と、第２積層体５Ｕの第２透明基材１５とを、紫外線を吸収する材料で製造する。
紫外線を吸収する材料としては、例えば芳香族ポリエステル材料あり、本実施形態では、その中のＰＥＴ（ポリエチレンテレフタレート）を用いる。
なお、本実施形態では、第１積層体５Ｄの第１透明基材６と、第２積層体５Ｕの第２透明基材１５とを、紫外線を吸収する材料で製造するが、これに限らない。例えば、調光部材１を、建築物の窓ガラス、ショーケース、屋内の透明パーテーション、車両のサンルーフ等に貼着する場合、第１透明基材６と第２透明基材１５とのうちの、内側となる透明基材は必ずしも紫外線を吸収する材料で製造されていなくてもよい。 Therefore, in the present embodiment, the first transparent base material 6 of the first laminated body 5D sandwiching the liquid crystal layer 8 and the second transparent base material 15 of the second laminated body 5U are manufactured of a material that absorbs ultraviolet rays.
As a material that absorbs ultraviolet rays, for example, there is an aromatic polyester material, and in the present embodiment, PET (polyethylene terephthalate) in the material is used.
In the present embodiment, the first transparent base material 6 of the first laminated body 5D and the second transparent base material 15 of the second laminated body 5U are manufactured with a material that absorbs ultraviolet rays, but the present invention is not limited to this. .. For example, when the dimming member 1 is attached to a window glass of a building, a showcase, an indoor transparent partition, a sunroof of a vehicle, or the like, of the first transparent base material 6 and the second transparent base material 15, The transparent base material on the inside does not necessarily have to be made of a material that absorbs ultraviolet rays.

図２はＰＥＴの吸収スペクトルを示す図である。ＰＥＴは、３５０ｎｍ付近より波長が短くなるほど透過率が低下し、特に３２０ｎｍ以下の光は、透過率がほぼ０％である。
したがって、本実施形態のようにＰＥＴを用いると、少なくとも３２０ｎｍ以下の紫外線はＰＥＴで吸収される。そうすると、３２０ｎｍ以下の光は、配向膜１７，１３、液晶層８（液晶分子、二色性色素）及びシール材１９に到達しない。
しかし、シール材１９は、本実施形態において上述のように３２０ｎｍ以上の紫外線で硬化するので、ＰＥＴを透過した光であっても、シール材１９を硬化することができる。 FIG. 2 is a diagram showing an absorption spectrum of PET. The transmittance of PET decreases as the wavelength becomes shorter than that of around 350 nm, and the transmittance of light of 320 nm or less is almost 0%.
Therefore, when PET is used as in the present embodiment, ultraviolet rays having a thickness of at least 320 nm or less are absorbed by PET. Then, the light of 320 nm or less does not reach the alignment films 17 and 13, the liquid crystal layer 8 (liquid crystal molecule, dichroic dye) and the sealing material 19.
However, since the sealing material 19 is cured by ultraviolet rays of 320 nm or more as described above in the present embodiment, the sealing material 19 can be cured even with light transmitted through PET.

なお、本実施形態では、シール材１９は光硬化型樹脂を用いたがこれに限定されず、熱硬化型の樹脂を用いても良い。その場合、例えば３２０ｎｍより長い波長のシール材１９の硬化用の紫外線も吸収するようなＰＥＮ（ポリエチレンナフタレート）を第１透明基材６や第２透明基材１５に用いることができる。ＰＥＮを用いると、ＰＥＴの３２０ｎｍ程度より波長の長い紫外線も吸収するので、より紫外線吸収効果が高い。 In the present embodiment, the sealing material 19 uses a photocurable resin, but the present invention is not limited to this, and a thermosetting resin may be used. In that case, for example, PEN (polyethylene naphthalate) that also absorbs ultraviolet rays for curing the sealing material 19 having a wavelength longer than 320 nm can be used for the first transparent base material 6 and the second transparent base material 15. When PEN is used, ultraviolet rays having a wavelength longer than about 320 nm of PET are also absorbed, so that the ultraviolet absorbing effect is higher.

本実施形態によると以下の効果を有する。
（１）まず、比較形態として、第１積層体５Ｄの第１透明基材６と、第２積層体５Ｕの第２透明基材１５とが、ＰＥＴやＰＥＮ以外の、例えば、波長が３２０ｎｍ以下において透過率が減少しない基材である場合について説明する。
この比較形態の場合、３２０ｎｍ以下の波長の短い光も、光配向膜である第１配向膜１３及び第２配向膜１７に到達する。したがって、これらの光配向膜である第１配向膜１３及び第２配向膜１７が劣化する可能性がある。
光配向膜は上述のように、紫外線を高分子膜上に照射することによって、偏光方向の高分子鎖を選択的に反応させ、これによって異方性を発生させて液晶配向能を付与する。本実施形態のように二量化型の材料を適用すると、配向した後においては、紫外線の照射によって比較的配向が変化しにくい。しかし、特に波長の短い紫外線が照射されつづけると、光配向膜が劣化する可能性がある。光配向膜が劣化すると、液晶分子が配向しにくくなるので、液晶分子が電界をかけても倒れなくなる可能性がある。
しかし、本実施形態では特に波長の短い紫外線を遮断することができるので、光配向膜である第１配向膜１３及び第２配向膜１７の劣化が低減される。 According to this embodiment, it has the following effects.
(1) First, as a comparative form, the first transparent base material 6 of the first laminated body 5D and the second transparent base material 15 of the second laminated body 5U are other than PET and PEN, for example, the wavelength is 320 nm or less. The case where the base material does not decrease the transmittance will be described.
In the case of this comparative form, short light having a wavelength of 320 nm or less also reaches the first alignment film 13 and the second alignment film 17, which are photo-alignment films. Therefore, these photo-alignment films, the first alignment film 13 and the second alignment film 17, may deteriorate.
As described above, the photoalignment film selectively reacts the polymer chains in the polarization direction by irradiating the polymer film with ultraviolet rays, thereby generating anisotropy and imparting liquid crystal alignment ability. When a dimerized material as in the present embodiment is applied, the orientation is relatively unlikely to change due to irradiation with ultraviolet rays after the orientation. However, the photoalignment film may deteriorate, especially when it is continuously irradiated with ultraviolet rays having a short wavelength. When the photoalignment film deteriorates, it becomes difficult for the liquid crystal molecules to be oriented, so that the liquid crystal molecules may not collapse even when an electric field is applied.
However, in the present embodiment, since ultraviolet rays having a particularly short wavelength can be blocked, deterioration of the first alignment film 13 and the second alignment film 17, which are photo-alignment films, is reduced.

（２）また、液晶層８も、紫外線が照射されると、液晶分子に分解等が生じて劣化する可能性がある。しかし、本実施形態では特に波長の短い紫外線を遮断することができるので、液晶の劣化が低減される。 (2) Further, when the liquid crystal layer 8 is also irradiated with ultraviolet rays, the liquid crystal molecules may be decomposed and deteriorated. However, in the present embodiment, since ultraviolet rays having a particularly short wavelength can be blocked, deterioration of the liquid crystal is reduced.

（３）二色性色素も、紫外線が照射されると劣化する可能性がある。しかし本実施形態では特に波長の短い紫外線を遮断することができるので、二色性色素の劣化が低減される。 (3) The dichroic pigment may also be deteriorated when irradiated with ultraviolet rays. However, in the present embodiment, since ultraviolet rays having a particularly short wavelength can be blocked, deterioration of the dichroic dye is reduced.

（実施例１）
図３（ａ）は、実際にＰＥＴ製の第１透明基材６及び第２透明基材１５を用いて製造した本実施形態の調光部材１において、図示する点線領域Ｓに紫外線を照射し、その後、第１透明電極１１及び第２透明電極１６間の電圧を調整して液晶層８の透過率を最小にした状態（もっとも暗い状態）の画像である。紫外線は３１３ｎｍ及び３６５ｎｍにピークを持つ高圧水銀ランプを用いて５００ｍＪの強さで照射した。
図示するように、紫外線を照射した部分と他の部分とにおいて透過率の差は見られず、全体的に均一な黒さを示した。すなわち、調光部材１の外観に劣化は見られなかった。 (Example 1)
In FIG. 3A, in the dimming member 1 of the present embodiment actually manufactured by using the first transparent base material 6 and the second transparent base material 15 made of PET, the dotted line region S shown in the figure is irradiated with ultraviolet rays. After that, the image is in a state where the voltage between the first transparent electrode 11 and the second transparent electrode 16 is adjusted to minimize the transmittance of the liquid crystal layer 8 (the darkest state). Ultraviolet rays were irradiated at an intensity of 500 mJ using a high-pressure mercury lamp having peaks at 313 nm and 365 nm.
As shown in the figure, no difference in transmittance was observed between the portion irradiated with ultraviolet rays and the other portions, and the blackness was uniform as a whole. That is, no deterioration was observed in the appearance of the dimming member 1.

（比較例１）
図３（ｂ）の比較例１は、ＣＯＰ（シクロオレフィンポリマー）基材を第１透明基材、第２透明基材として用いた調光部材に、実施例１と同様に紫外線を照射し、その後、電極間の電圧を調整して液晶層の透過率を最小にした際の画像である。
比較例１によると、図示するように、紫外線を照射した部分の液晶セルの外観に劣化がみられた。具体的には、透過率が他の部分と比べて減少せず、他の部分と比較すると、白い画像となった。 (Comparative Example 1)
In Comparative Example 1 of FIG. 3B, a dimming member using a COP (cycloolefin polymer) base material as the first transparent base material and the second transparent base material was irradiated with ultraviolet rays in the same manner as in Example 1. After that, it is an image when the transmittance between the electrodes is adjusted to minimize the transmittance of the liquid crystal layer.
According to Comparative Example 1, as shown in the figure, deterioration was observed in the appearance of the liquid crystal cell in the portion irradiated with ultraviolet rays. Specifically, the transmittance did not decrease as compared with the other parts, and the image became white when compared with the other parts.

（比較例２）
図３（ｃ）の比較例２は、ＰＣ（ポリカーボネート）基材を第１透明基材、第２透明基材として用いた調光部材に、実施例１と同様に紫外線を照射し、その後、電極間の電圧を調整して液晶層の透過率を最小にした際の画像である。
図示するように、紫外線を照射した部分の液晶セルの外観に劣化がみられた。透過率が他の部分と比べて減少せず、他の部分と比較すると、白い画像となった。 (Comparative Example 2)
In Comparative Example 2 of FIG. 3C, a dimming member using a PC (polycarbonate) base material as the first transparent base material and the second transparent base material was irradiated with ultraviolet rays in the same manner as in Example 1, and then, This is an image when the voltage between the electrodes is adjusted to minimize the transmittance of the liquid crystal layer.
As shown in the figure, deterioration was observed in the appearance of the liquid crystal cell in the portion irradiated with ultraviolet rays. The transmittance did not decrease compared to the other parts, and the image became white when compared with the other parts.

以上に示すように、本実施形態の実施例１によると、比較例１及び比較例２と異なり、実施例１のようにＰＥＴ製の第１透明基材６及び第２透明基材１５を用いて調光部材１を製造した場合、液晶層８の劣化を低減することができることが確認できた。 As described above, according to Example 1 of the present embodiment, unlike Comparative Example 1 and Comparative Example 2, the first transparent base material 6 and the second transparent base material 15 made of PET are used as in Example 1. It was confirmed that when the dimming member 1 was manufactured, the deterioration of the liquid crystal layer 8 could be reduced.

（第２実施形態）
図４は本発明の第２実施形態に係る調光部材２０１を示す概略断面図である。図示するように第２実施形態の調光部材２０１は、それぞれが第１実施形態の調光部材１と類似の構成を有する第１液晶セル２０４と第２液晶セル２３４とが２層重なった形状を有する。
第１液晶セル２０４と第２液晶セル２３４とは、間に配置された透明粘着層２３０により互いに貼着されている。
第２実施形態においては、第１液晶セル２０４の透明基材２１５，２０６、第２液晶セル２２４の透明基材２２５，２３６のうちの、互いに対向していない透明基材２１５，２３６、すなわち、調光部材２０１の最も外側に配置されている２つの透明基材２１５，２３６が、ＰＥＴで製造され、紫外線吸収効果を有している。 (Second Embodiment)
FIG. 4 is a schematic cross-sectional view showing the dimming member 201 according to the second embodiment of the present invention. As shown in the figure, the dimming member 201 of the second embodiment has a shape in which a first liquid crystal cell 204 and a second liquid crystal cell 234 each having a configuration similar to that of the dimming member 1 of the first embodiment are stacked in two layers. Has.
The first liquid crystal cell 204 and the second liquid crystal cell 234 are attached to each other by a transparent adhesive layer 230 arranged between them.
In the second embodiment, of the transparent base materials 215 and 206 of the first liquid crystal cell 204 and the transparent base materials 225 and 236 of the second liquid crystal cell 224, the transparent base materials 215 and 236 that do not face each other, that is, The two transparent base materials 215 and 236 arranged on the outermost side of the dimming member 201 are manufactured of PET and have an ultraviolet absorbing effect.

本実施形態においても、透明基材２１５，２３６にＰＥＴを用いているので、少なくとも３２０ｎｍ以下の紫外線は透明基材２１５，２３６で吸収される。そうすると、３２０ｎｍ以下の光は、配向膜２１７，２１３，２２７，２２３、液晶層２０８，２３８（液晶分子、二色性色素）に到達しない。したがって、配向膜２１７，２１３，２２７，２２３、液晶層２０８，２３８（液晶分子、二色性色素）の紫外線による劣化が低減される。
なお、本実施形態においても、透明基材２１５，２３６のうちの、内側となる透明基材は必ずしも紫外線を吸収する材料で製造されていなくてもよい。 Also in this embodiment, since PET is used for the transparent base materials 215 and 236, ultraviolet rays having a thickness of at least 320 nm or less are absorbed by the transparent base materials 215 and 236. Then, the light of 320 nm or less does not reach the alignment film 217, 213, 227, 223 and the liquid crystal layer 208, 238 (liquid crystal molecule, dichroic dye). Therefore, deterioration of the alignment films 217, 213, 227, 223 and the liquid crystal layers 208, 238 (liquid crystal molecules, dichroic dye) due to ultraviolet rays is reduced.
Also in this embodiment, the inner transparent base material among the transparent base materials 215 and 236 does not necessarily have to be manufactured of a material that absorbs ultraviolet rays.

（第３実施形態）
図５は本発明の第３実施形態に係る調光部材３０１を示す概略断面図である。図示するように第３実施形態の調光部材３０１は、第１実施形態の調光部材と類似の構成を有する第１液晶セル３０４の一方の透明基材３１５に透明粘着層３２０を介して直線偏光板３２１が貼着されている。そして、第１液晶セル３０４の他方の透明基材３０６がＰＥＴで製造され、紫外線吸収効果を有している。 (Third Embodiment)
FIG. 5 is a schematic cross-sectional view showing a dimming member 301 according to a third embodiment of the present invention. As shown in the figure, the dimming member 301 of the third embodiment is linearly formed on one transparent base material 315 of the first liquid crystal cell 304 having a structure similar to that of the dimming member of the first embodiment via the transparent adhesive layer 320. A polarizing plate 321 is attached. The other transparent base material 306 of the first liquid crystal cell 304 is manufactured by PET and has an ultraviolet absorbing effect.

本実施形態においても、透明基材３０６がＰＥＴを用いているので、少なくとも３２０ｎｍ以下の紫外線はＰＥＴで吸収される。
また、透明基材３０６と逆側の透明基材３１５側は、外側に直線偏光板３２１が配置されている。直線偏光板３２１により紫外線はある程度カットされる。なお、直線偏光板３２１に紫外線吸収材料を含ませることによって、さらに紫外線の透過を低減することができる。
したがって、本実施形態においても、配向膜３１７，３１３、液晶層３０８（液晶分子、二色性色素）の紫外線による劣化が低減される。
なお、透明基材３１５もＰＥＴにより製造し、紫外線吸収効果を向上させてもよい。 Also in this embodiment, since the transparent base material 306 uses PET, ultraviolet rays having a thickness of at least 320 nm or less are absorbed by PET.
Further, on the transparent base material 315 side opposite to the transparent base material 306, a linear polarizing plate 321 is arranged on the outside. Ultraviolet rays are cut to some extent by the linear polarizing plate 321. By including the ultraviolet absorbing material in the linear polarizing plate 321, the transmission of ultraviolet rays can be further reduced.
Therefore, also in this embodiment, deterioration of the alignment films 317 and 313 and the liquid crystal layer 308 (liquid crystal molecules, dichroic dye) due to ultraviolet rays is reduced.
The transparent base material 315 may also be manufactured by PET to improve the ultraviolet absorbing effect.

（第４実施形態）
図６は本発明の第４実施形態に係る調光部材４０１を示す概略断面図である。図示するように第４実施形態の調光部材４０１は、第１実施形態の調光部材１と類似の構成を有する第１液晶セル４０４を含む。第１液晶セル４０４の一方の透明基材４１５の更に外側に透明粘着層４２０を介してＰＥＴで製造された透明基材４２１が貼着されている。さらに、第１液晶セル４０４の他方の透明基材４０６がＰＥＴで製造され、紫外線吸収効果を有する。
ただし、本実施形態は、透明基材４０６が室内側を想定しており、透明基材４０６は必ずしも紫外線を吸収する材料で製造されていなくてもよい。
すなわち、本実施形態は、透明電極４１６が形成された透明基材４１５ではなく、その外側にＰＥＴで製造された透明基材４２１が別途設けられている。 (Fourth Embodiment)
FIG. 6 is a schematic cross-sectional view showing a dimming member 401 according to a fourth embodiment of the present invention. As shown in the figure, the dimming member 401 of the fourth embodiment includes a first liquid crystal cell 404 having a configuration similar to that of the dimming member 1 of the first embodiment. A transparent base material 421 manufactured by PET is attached to the outer side of one of the transparent base materials 415 of the first liquid crystal cell 404 via a transparent adhesive layer 420. Further, the other transparent base material 406 of the first liquid crystal cell 404 is manufactured by PET and has an ultraviolet absorbing effect.
However, in the present embodiment, the transparent base material 406 is assumed to be on the indoor side, and the transparent base material 406 does not necessarily have to be manufactured of a material that absorbs ultraviolet rays.
That is, in this embodiment, instead of the transparent base material 415 on which the transparent electrode 416 is formed, the transparent base material 421 manufactured by PET is separately provided on the outside thereof.

本実施形態においても、透明基材４２１，４０６がＰＥＴを用いているのでと、少なくとも３２０ｎｍ以下の紫外線はＰＥＴで吸収される。そうすると、３２０ｎｍ以下の光は、配向膜に到達しない。したがって、配向膜４１７，４１３、液晶層４０８（液晶分子、二色性色素）の紫外線による劣化が低減される。
なお、透明基材４２１もＰＥＴにより製造し、紫外線吸収効果を向上させてもよい。 Also in this embodiment, since the transparent base materials 421 and 406 use PET, ultraviolet rays having a thickness of at least 320 nm or less are absorbed by PET. Then, the light of 320 nm or less does not reach the alignment film. Therefore, deterioration of the alignment films 417 and 413 and the liquid crystal layer 408 (liquid crystal molecules, dichroic dye) due to ultraviolet rays is reduced.
The transparent base material 421 may also be produced by PET to improve the ultraviolet absorbing effect.

（第５実施形態）
図７は本発明の第５実施形態に係る調光部材５０１を示す概略断面図である。図示するように第５実施形態の調光部材５０１は、第１実施形態の調光部材１と類似の構成を有する第１液晶セル５０４に含まれる透明基材５１５，５０６の更に外側に透明粘着層５２０，５２２を介してＰＥＴ製の透明基材５２１，５２３が貼着されている。
すなわち、本実施形態は、透明電極５１６，５１１が形成された透明基材５１５，５０６ではなく、その外側にＰＥＴで製造された透明基材５２１，５２３が別途設けられている。 (Fifth Embodiment)
FIG. 7 is a schematic cross-sectional view showing a dimming member 501 according to a fifth embodiment of the present invention. As shown in the figure, the dimming member 501 of the fifth embodiment is transparently adhered to the outer side of the transparent base materials 515 and 506 contained in the first liquid crystal cell 504 having a structure similar to that of the dimming member 1 of the first embodiment. Transparent substrates 521 and 523 made of PET are attached via layers 520 and 522.
That is, in this embodiment, instead of the transparent base materials 515 and 506 on which the transparent electrodes 516 and 511 are formed, the transparent base materials 521 and 523 manufactured by PET are separately provided on the outside thereof.

本実施形態においても、透明基材５２１，５２３がＰＥＴを用いているのでと、少なくとも３２０ｎｍ以下の紫外線はＰＥＴで吸収される。そうすると、３２０ｎｍ以下の光は、配向膜５１７，５１３に到達しない。したがって、配向膜５１７，５１３、液晶層５０８（液晶分子、二色性色素）の紫外線による劣化が低減される。
なお、透明基材５１５，５０６もＰＥＴにより製造し、紫外線吸収効果を向上させてもよい。 Also in this embodiment, since the transparent substrates 521 and 523 use PET, ultraviolet rays having a thickness of at least 320 nm or less are absorbed by PET. Then, the light of 320 nm or less does not reach the alignment film 517,513. Therefore, deterioration of the alignment films 517 and 513 and the liquid crystal layer 508 (liquid crystal molecules, dichroic dye) due to ultraviolet rays is reduced.
The transparent base materials 515 and 506 may also be produced by PET to improve the ultraviolet absorbing effect.

（第６実施形態）
図８は本発明の第６実施形態に係る調光部材６０１を示す概略断面図である。図示するように第６実施形態の調光部材６０１は、それぞれが第１実施形態の調光部材１と類似の構成を有する第１液晶セル６０４と第２液晶セル６３４とが２層重なった形状を有する。
第１液晶セル６０４と第２液晶セル６３４とは、間に配置された透明粘着層６３０により互いに貼着されている。
第６実施形態においては、第１液晶セル６０４における第２液晶セル６３４に対向していない側に、透明粘着層６３１を介して透明基材６３２が配置されている。この透明基材６３２がＰＥＴで製造されて紫外線吸収効果を有している。そして、第２液晶セル６３４における第１液晶セル６０４に対向していない透明基材６３６が、ＰＥＴで製造され紫外線吸収効果を有する。ただし、透明基材６３６側が室内側の場合、透明基材６３６は必ずしも紫外線を吸収する材料で製造されていなくてもよい。 (Sixth Embodiment)
FIG. 8 is a schematic cross-sectional view showing a dimming member 601 according to a sixth embodiment of the present invention. As shown in the figure, the dimming member 601 of the sixth embodiment has a shape in which a first liquid crystal cell 604 and a second liquid crystal cell 634 having a configuration similar to that of the dimming member 1 of the first embodiment are stacked in two layers. Has.
The first liquid crystal cell 604 and the second liquid crystal cell 634 are attached to each other by a transparent adhesive layer 630 arranged between them.
In the sixth embodiment, the transparent base material 632 is arranged via the transparent adhesive layer 631 on the side of the first liquid crystal cell 604 that does not face the second liquid crystal cell 634. This transparent base material 632 is manufactured by PET and has an ultraviolet absorbing effect. Then, the transparent base material 636 of the second liquid crystal cell 634 that does not face the first liquid crystal cell 604 is manufactured by PET and has an ultraviolet absorbing effect. However, when the transparent base material 636 side is the indoor side, the transparent base material 636 does not necessarily have to be manufactured of a material that absorbs ultraviolet rays.

本実施形態においても、調光部材６０１の外側に配置された透明基材６３２及び６３６がＰＥＴを用いているので、少なくとも３２０ｎｍ以下の紫外線はＰＥＴで吸収される。そうすると、３２０ｎｍ以下の光は、配向膜６１７，６１３，６２７，６２３、液晶層６１８，６２８（液晶分子、二色性色素）に到達しない。
したがって、配向膜６１７，６１３、６２７，６２３、液晶層６１８，６２８（液晶分子、二色性色素）の紫外線による劣化が低減される。
なお、透明基材６１５もＰＥＴにより製造し、紫外線吸収効果を向上させてもよい。 Also in this embodiment, since the transparent substrates 632 and 636 arranged on the outside of the dimming member 601 use PET, ultraviolet rays of at least 320 nm or less are absorbed by PET. Then, the light of 320 nm or less does not reach the alignment film 617, 613, 627, 623 and the liquid crystal layer 618, 628 (liquid crystal molecule, dichroic dye).
Therefore, deterioration of the alignment films 617, 613, 627, 623 and the liquid crystal layers 618, 628 (liquid crystal molecules, dichroic dyes) due to ultraviolet rays is reduced.
The transparent base material 615 may also be manufactured by PET to improve the ultraviolet absorbing effect.

（第７実施形態）
図９は本発明の第７実施形態に係る調光部材７０１を示す概略断面図である。図示するように第７実施形態の調光部材７０１は、それぞれが第１実施形態の調光部材１と類似の構成を有する第１液晶セル７０４と第２液晶セル７３４とが２層重なった形状を有する。
第１液晶セル７０４と第２液晶セル７３４とは、間に配置された透明粘着層７３０により互いに貼着されている。
第７実施形態においては、第１液晶セル７０４における第２液晶セル７３４に対向していない側の外側に透明粘着層７３１を介して配置されている透明基材７３２が、ＰＥＴで製造されて紫外線吸収効果を有する。
さらに、第２液晶セル７３４における第１液晶セル７０４に対向していない側の外側に透明粘着層７３３を介して配置されている透明基材７３５が、ＰＥＴで製造されて紫外線吸収効果を有する。 (7th Embodiment)
FIG. 9 is a schematic cross-sectional view showing a dimming member 701 according to a seventh embodiment of the present invention. As shown in the figure, the dimming member 701 of the seventh embodiment has a shape in which two layers of a first liquid crystal cell 704 and a second liquid crystal cell 734 each having a configuration similar to that of the dimming member 1 of the first embodiment are overlapped. Has.
The first liquid crystal cell 704 and the second liquid crystal cell 734 are attached to each other by a transparent adhesive layer 730 arranged between them.
In the seventh embodiment, the transparent base material 732 arranged via the transparent adhesive layer 731 on the outside of the first liquid crystal cell 704 on the side not facing the second liquid crystal cell 734 is produced by PET and is subjected to ultraviolet rays. Has an absorption effect.
Further, the transparent base material 735 arranged on the outside of the second liquid crystal cell 734 on the side not facing the first liquid crystal cell 704 via the transparent adhesive layer 733 is manufactured by PET and has an ultraviolet absorbing effect.

本実施形態においても、透明基材７３２，７３５がＰＥＴを用いているので、少なくとも３２０ｎｍ以下の紫外線はＰＥＴで吸収される。そうすると、３２０ｎｍ以下の光は、配向膜７１７，７１３、７２７，７２３、液晶層７１８，７２８（液晶分子、二色性色素）に到達しない。
したがって、配向膜７１７，７１３、７２７，７２３、液晶層７１８，７２８（液晶分子、二色性色素）の紫外線による劣化が低減される。
なお、透明基材７１５、７３６もＰＥＴにより製造し、紫外線吸収効果を向上させてもよい。 Also in this embodiment, since the transparent base materials 732 and 735 use PET, ultraviolet rays having a thickness of at least 320 nm or less are absorbed by PET. Then, the light of 320 nm or less does not reach the alignment film 717, 713, 727, 723, the liquid crystal layer 718, 728 (liquid crystal molecule, dichroic dye).
Therefore, deterioration of the alignment films 717, 713, 727, 723 and the liquid crystal layers 718, 728 (liquid crystal molecules, dichroic dye) due to ultraviolet rays is reduced.
The transparent substrates 715 and 736 may also be produced by PET to improve the ultraviolet absorbing effect.

（第８実施形態）
図１０は本発明の第８実施形態に係る調光部材８０１を示す概略断面図である。
第８実施形態の調光部材８０１は、第１実施形態の調光部材と類似の構成を有する液晶セル８０４の一方の透明基材８１５に透明粘着層８２０を介して直線偏光板８２１が貼着されている。
そして、さらにその外周側に、透明粘着層８２２を介して配置された透明基材８２３が、ＰＥＴで製造され、紫外線吸収効果を有している。
また、液晶セル８０４の他方の透明基材８０６がＰＥＴで製造され、紫外線吸収効果を有しているが透明基材８０６が内側となる場合、透明基材８０６は必ずしも紫外線を吸収する材料で製造されていなくてもよい。 (8th Embodiment)
FIG. 10 is a schematic cross-sectional view showing a dimming member 801 according to an eighth embodiment of the present invention.
In the dimming member 801 of the eighth embodiment, a linear polarizing plate 821 is attached to one transparent base material 815 of the liquid crystal cell 804 having a structure similar to that of the dimming member of the first embodiment via a transparent adhesive layer 820. Has been done.
Further, a transparent base material 823 arranged via a transparent adhesive layer 822 on the outer peripheral side thereof is manufactured by PET and has an ultraviolet absorbing effect.
Further, when the other transparent base material 806 of the liquid crystal cell 804 is manufactured by PET and has an ultraviolet absorbing effect, but the transparent base material 806 is on the inside, the transparent base material 806 is not necessarily manufactured by a material that absorbs ultraviolet rays. It does not have to be.

本実施形態においては、調光部材８０１の一方は、直線偏光板８２１が配置され、さらにＰＥＴで製造された透明基材８２３が配置されているので、紫外線の透過がより低減される。
調光部材８０１の他方の透明基材８０６が、ＰＥＴで製造されているので、紫外線が吸収効果を有している。
したがって、３２０ｎｍ以下の紫外線は、配向膜８１７，８１３、液晶層８０８（液晶分子、二色性色素）に到達しない。
したがって、配向膜８１７，８１３、液晶層８０８（液晶分子、二色性色素）の紫外線による劣化が低減される。
なお、透明基材８１５、８２１もＰＥＴにより製造し、紫外線吸収効果を向上させてもよい。 In the present embodiment, since the linear polarizing plate 821 is arranged on one of the dimming members 801 and the transparent base material 823 manufactured by PET is further arranged, the transmission of ultraviolet rays is further reduced.
Since the other transparent base material 806 of the dimming member 801 is manufactured of PET, ultraviolet rays have an absorbing effect.
Therefore, ultraviolet rays of 320 nm or less do not reach the alignment films 817, 813 and the liquid crystal layer 808 (liquid crystal molecules, dichroic dye).
Therefore, deterioration of the alignment films 817, 813 and the liquid crystal layer 808 (liquid crystal molecules, dichroic dye) due to ultraviolet rays is reduced.
The transparent substrates 815 and 821 may also be produced by PET to improve the ultraviolet absorbing effect.

（第９実施形態）
図１１は本発明の第９実施形態に係る調光部材９０１を示す概略断面図である。
第９実施形態の調光部材９０１は、第１実施形態の調光部材と類似の構成を有する液晶セル９０４の一方の透明基材９１５に透明粘着層９２０を介して直線偏光板９２１が貼着されている。
そして、さらにその外周側に、透明粘着層９２２を介して配置された透明基材９２３が、ＰＥＴで製造され、紫外線吸収効果を有している。
また、液晶セル９０４の他方の透明基材９０６に透明粘着層９３１を介して紫外線吸収材料を含んだ直線偏光板９３２が貼着されている。 (9th Embodiment)
FIG. 11 is a schematic cross-sectional view showing a dimming member 901 according to a ninth embodiment of the present invention.
In the dimming member 901 of the ninth embodiment, the linear polarizing plate 921 is attached to one of the transparent base materials 915 of the liquid crystal cell 904 having a structure similar to that of the dimming member of the first embodiment via the transparent adhesive layer 920. Has been done.
Further, a transparent base material 923 arranged on the outer peripheral side thereof via the transparent adhesive layer 922 is manufactured by PET and has an ultraviolet absorbing effect.
Further, a linear polarizing plate 932 containing an ultraviolet absorbing material is attached to the other transparent base material 906 of the liquid crystal cell 904 via a transparent adhesive layer 931.

本実施形態においては、調光部材９０１の一方は、紫外線吸収材料を含んだ直線偏光板９２１が配置され、さらにＰＥＴで製造された透明基材９２３が配置されているので、紫外線の透過がより低減される。
調光部材９０１の他方は、透明基材９０６に透明粘着層９３１を介して直線偏光板９３２が貼着されている。
したがって、３２０ｎｍ以下の紫外線は、配向膜９１７，９３９、液晶層９０８（液晶分子、二色性色素）に到達しない。
したがって、配向膜９１７，９１３、液晶層９０８（液晶分子、二色性色素）の紫外線による劣化が低減される。
なお、透明基材９１５、９０６もＰＥＴにより製造し、紫外線吸収効果を向上させてもよい。 In the present embodiment, one of the dimming members 901 is arranged with a linear polarizing plate 921 containing an ultraviolet absorbing material, and further arranged with a transparent base material 923 manufactured by PET, so that ultraviolet rays are more transmitted. It will be reduced.
On the other side of the dimming member 901, a linear polarizing plate 932 is attached to a transparent base material 906 via a transparent adhesive layer 931.
Therefore, ultraviolet rays of 320 nm or less do not reach the alignment film 917,939 and the liquid crystal layer 908 (liquid crystal molecules, dichroic dye).
Therefore, deterioration of the alignment films 917 and 913 and the liquid crystal layer 908 (liquid crystal molecules, dichroic dye) due to ultraviolet rays is reduced.
The transparent substrates 915 and 906 may also be produced by PET to improve the ultraviolet absorbing effect.

（第１０実施形態）
図１２は本発明の第１０実施形態に係る調光部材１００１を示す概略断面図である。
第１０実施形態の調光部材１００１は、第１実施形態の調光部材と類似の構成を有する液晶セル１００４の一方の透明基材１０１５に透明粘着層１０２１を介してＰＥＴにより製造された透明基材１０２２が貼着されている。
そして、さらにその外周側に、透明粘着層１０２３を介して配置された防湿層１０２４が貼着されている。防湿層１０２４は、吸水率が低い透明フィルム材であるＣＯＰやガラスで製造されている。
また、液晶セル１００４の他方の透明基材１００６は、ＰＥＴで製造され紫外線吸収効果を有する。 (10th Embodiment)
FIG. 12 is a schematic cross-sectional view showing a dimming member 1001 according to a tenth embodiment of the present invention.
The dimming member 1001 of the tenth embodiment is a transparent group manufactured by PET on one transparent base material 1015 of the liquid crystal cell 1004 having a structure similar to that of the dimming member of the first embodiment via a transparent adhesive layer 1021. Material 1022 is attached.
Further, a moisture-proof layer 1024 arranged via the transparent adhesive layer 1023 is attached to the outer peripheral side thereof. The moisture-proof layer 1024 is made of COP or glass, which is a transparent film material having a low water absorption rate.
Further, the other transparent base material 1006 of the liquid crystal cell 1004 is manufactured by PET and has an ultraviolet absorbing effect.

本実施形態においては、調光部材１００１の一方は、ＰＥＴで製造された透明基材１０２２が配置され、調光部材１００１の他方の透明基材１００６はＰＥＴで製造され、紫外線吸収効果を有する。ただし、透明基材１０２２，１００６のうちの液晶層１００８に対して室内側となる透明基材は必ずしも紫外線を吸収する材料で製造されていなくてもよい。
したがって、３２０ｎｍ以下の紫外線は、配向膜１０１７，１０１３、液晶層１００８（液晶分子、二色性色素）に到達しない。
したがって、配向膜１０１７，１０１３、液晶層１００８（液晶分子、二色性色素）の紫外線による劣化が低減される。
さらに、防湿層１０２４が設けられているので、防湿効果を有する。
したがって、加水分解等による配向膜１０１７，１０１３の劣化が低減される。
なお、透明基材１０１５もＰＥＴにより製造し、紫外線吸収効果を向上させてもよい。 In the present embodiment, one of the dimming members 1001 is arranged with a transparent base material 1022 manufactured by PET, and the other transparent base material 1006 of the dimming member 1001 is manufactured by PET and has an ultraviolet absorbing effect. However, the transparent base material on the indoor side of the liquid crystal layer 1008 of the transparent base materials 1022 and 1006 does not necessarily have to be manufactured of a material that absorbs ultraviolet rays.
Therefore, ultraviolet rays of 320 nm or less do not reach the alignment films 1017, 1013 and the liquid crystal layer 1008 (liquid crystal molecules, dichroic dye).
Therefore, deterioration of the alignment films 1017 and 1013 and the liquid crystal layer 1008 (liquid crystal molecules, dichroic dye) due to ultraviolet rays is reduced.
Further, since the moisture-proof layer 1024 is provided, it has a moisture-proof effect.
Therefore, deterioration of the alignment films 1017 and 1013 due to hydrolysis or the like is reduced.
The transparent base material 1015 may also be manufactured by PET to improve the ultraviolet absorbing effect.

（第１１実施形態）
図１３は本発明の第１１実施形態に係る調光部材１１０１を示す概略断面図である。
第１１実施形態の調光部材１１０１は、第１実施形態の調光部材１と類似の構成を有する液晶セル１１０４の一方の透明基材１１１５に透明粘着層１１２１を介してＰＥＴにより形成された透明基材１１２２が貼着されている。
そして、さらにその外周側に、透明粘着層１１２３を介して配置されたＩＲ（赤外線）カットフィルム１１２４が貼着されている。
また、液晶セル１１０４の他方の透明基材１１０６は、ＰＥＴで製造され紫外線吸収効果を有する。ただし、透明基材１１２２，１１０６のうちの液晶層１１０８に対して室内側となる透明基材は必ずしも紫外線を吸収する材料で製造されていなくてもよい。 (11th Embodiment)
FIG. 13 is a schematic cross-sectional view showing the dimming member 1101 according to the eleventh embodiment of the present invention.
The dimming member 1101 of the eleventh embodiment is transparent formed by PET on one transparent base material 1115 of the liquid crystal cell 1104 having a structure similar to that of the dimming member 1 of the first embodiment via a transparent adhesive layer 1121. The base material 1122 is attached.
Further, an IR (infrared) cut film 1124 arranged via the transparent adhesive layer 1123 is attached to the outer peripheral side thereof.
Further, the other transparent base material 1106 of the liquid crystal cell 1104 is manufactured by PET and has an ultraviolet absorbing effect. However, the transparent base material on the indoor side of the liquid crystal layer 1108 of the transparent base materials 1122 and 1106 does not necessarily have to be manufactured of a material that absorbs ultraviolet rays.

本実施形態においては、調光部材１１０１の一方は、ＰＥＴで製造された透明基材１１２２が配置され、調光部材１１０１の他方の透明基材１１０６はＰＥＴで製造され紫外線吸収効果を有する。
したがって、３２０ｎｍ以下の紫外線は、配向膜１１１７，１１１３、液晶層１１０８（液晶分子、二色性色素）に到達しない。
したがって、配向膜１１１７，１１１３、液晶層１１０８（液晶分子、二色性色素）の紫外線による劣化が低減される。
さらに、ＩＲカットフィルム１１２４が設けられているので、赤外線遮断効果を有する。
したがって、調光部材１１０１に断熱効果機能を付加することができる。 In the present embodiment, one of the dimming members 1101 is arranged with a transparent base material 1122 manufactured by PET, and the other transparent base material 1106 of the dimming member 1101 is manufactured by PET and has an ultraviolet absorbing effect.
Therefore, ultraviolet rays of 320 nm or less do not reach the alignment films 1117 and 1113 and the liquid crystal layer 1108 (liquid crystal molecules, dichroic dye).
Therefore, deterioration of the alignment films 1117 and 1113 and the liquid crystal layer 1108 (liquid crystal molecules, dichroic dye) due to ultraviolet rays is reduced.
Further, since the IR cut film 1124 is provided, it has an infrared ray blocking effect.
Therefore, the heat insulating effect function can be added to the dimming member 1101.

１，２０１，３０１，４０１，５０１，６０１，７０１，８０１，９０１，１００１，１１０１調光部材
５Ｄ第１積層体
５Ｕ第２積層体
６，１５，２０６，２１５，２２５，２３６，３０６，３１５，４０６，４１５，４２１，５０６，５１５，５２１，５２３，６０６，６１５，６２５，６３２，６３６，７０６，７１５，７２５，７３２，７３６，８０６，８１５，８２３，９０６，９１５，９２３，１００６，１０１５，１０２２，１１０６，１１１５，１１２２透明基材
８，２０８，２３８，３０８，４０８，５０８，６１８，６２８，７１８，７２８，８０８，９０８，１００８，１１０８液晶層
１１，１６，４１６，５１１，５１６透明電極
１２スペーサ
１３，１７，２１３，２１７，２２３，２２７，３１３，３１７，４１３，４１７，５１３，５１７，６１３，６１７，６２３，６２７，７１３，７１７，７２３，７２７，８１７，９１３，９１７，９３９，１０１３，１０１７，１１１３，１１１７配向膜
１９シール材
２０４，２２４，２３４，３０４，４０４，５０４，６０４，６３４，７０４，７１４，７２４，７３４，８０４，９０４，１００４，１１０４液晶セル
２３０，３２０，４２０，５２０，５２２，６３０，６３１，７３０，７３１，７３３，８２０，８２２，９２０，９２２，９３１，１０２１，１０２３，１１２１，１１２３透明粘着層
３２１，８２１，９２１，９３２直線偏光板
１０２４防湿層
１１２４ＩＲカットフィルム 1,201,301,401,501,601,701,801,901,1001,1101 Dimming member 5D 1st laminated body 5U 2nd laminated body 6,15,206,215,225,236,306,315 406,415,421,506,515,521,523,606,615,625,632,636,706,715,725,732,736,806,815,823,906,915,923,100,1015 1022, 1106, 1115, 1122 Transparent substrate 8,208,238,308,408,508,618,628,718,728,808,908,1008,1108 Liquid crystal layer 11,16,416,511,516 Transparent electrode 12 Spacers 13,17,213,217,223,227,313,317,413,417,513,517,613,617,623,627,713,717,723,727,817,913,917,939, 1013, 1017, 1113, 1117 Alignment film 19 Sealing material 204,224,234,304,404,504,604,634,704,714,724,734,804,904,1004,1104 Liquid crystal cell 230,320,420 , 520, 522,630,631,730, 731,733,820,822,920,922,931,1021,1023,1121,1123 Transparent adhesive layer 321,821,921,932 Linear polarizing plate 1024 Moisture-proof layer 1124 IR Cut film

Claims

A dimming member in which a first liquid crystal cell and a second liquid crystal cell are laminated.
The first liquid crystal cell is
A first transparent base material and a second transparent base material facing the first transparent base material,
The first transparent electrode formed on one side of the first transparent base material and
A second transparent electrode formed on one side of the second transparent base material and
Includes a liquid crystal material and the dichroic dye, and a first liquid crystal layer whose transmittance of light is varied by the potential difference between the second transparent electrode and the first transparent electrode,
A first alignment film provided between the first transparent electrode and the first liquid crystal layer,
A second alignment film provided between the second transparent electrode and the first liquid crystal layer,
With
The second liquid crystal cell is
A third transparent base material and a fourth transparent base material facing the third transparent base material,
A third transparent electrode formed on one side of the third transparent base material and
The fourth transparent electrode formed on one side of the fourth transparent base material and
A second liquid crystal layer containing a liquid crystal material and a dichroic dye and whose light transmittance varies depending on the potential difference between the third transparent electrode and the fourth transparent electrode.
A third alignment film provided between the third transparent electrode and the second liquid crystal layer,
A fourth alignment film provided between the fourth transparent electrode and the second liquid crystal layer,
With
The second transparent base material of the first liquid crystal cell and the third transparent base material of the second liquid crystal cell are attached by a transparent adhesive layer.
At least one of the first transparent base material and the fourth transparent base material is an ultraviolet absorbing base material that absorbs ultraviolet rays.
Dimming member.

A dimming member in which a first liquid crystal cell and a second liquid crystal cell are laminated.
The first liquid crystal cell is
A first transparent base material and a second transparent base material facing the first transparent base material,
The first transparent electrode formed on one side of the first transparent base material and
A second transparent electrode formed on one side of the second transparent base material and
A first liquid crystal layer containing a liquid crystal material and a dichroic dye, whose light transmittance varies depending on the potential difference between the first transparent electrode and the second transparent electrode.
A first alignment film provided between the first transparent electrode and the first liquid crystal layer,
A second alignment film provided between the second transparent electrode and the first liquid crystal layer,
With
The second liquid crystal cell is
A third transparent base material and a fourth transparent base material facing the third transparent base material,
A third transparent electrode formed on one side of the third transparent base material and
The fourth transparent electrode formed on one side of the fourth transparent base material and
A second liquid crystal layer containing a liquid crystal material and a dichroic dye and whose light transmittance varies depending on the potential difference between the third transparent electrode and the fourth transparent electrode.
A third alignment film provided between the third transparent electrode and the second liquid crystal layer,
A fourth alignment film provided between the fourth transparent electrode and the second liquid crystal layer,
With
The second transparent base material of the first liquid crystal cell and the third transparent base material of the second liquid crystal cell are attached by a transparent adhesive layer.
A fifth transparent base material laminated on the side opposite to the first transparent electrode of the first transparent base material is provided.
The fifth transparent base material is an ultraviolet absorbing base material that absorbs ultraviolet rays.
Dimming member.

The fourth transparent base material is an ultraviolet absorbing base material that absorbs ultraviolet rays.
The dimming member according to claim 2.

A sixth transparent base material laminated on the side opposite to the fourth transparent electrode of the fourth transparent base material is provided.
The sixth transparent base material is an ultraviolet absorbing base material that absorbs ultraviolet rays.
The dimming member according to claim 2.

The ultraviolet absorbing base material is made of an aromatic polyester material.
The dimming member according to any one of claims 1 to 4.

The ultraviolet absorbing base material absorbs ultraviolet rays of 313 nm.
The dimming member according to any one of claims 1 to 5.

Each of the liquid crystal layers is provided with a spacer of a photocurable resin that defines the spacing between the liquid crystal layers.
Each of the transparent substrates transmits ultraviolet rays that cure the photocurable resin.
The dimming member according to any one of claims 1 to 6.

The ultraviolet absorbing base material is made of polyethylene terephthalate.
The dimming member according to any one of claims 1 to 7.

The UV absorbing substrate is made of polyethylene naphthalate.
The dimming member according to any one of claims 1 to 5.

A moisture-proof layer is provided on the outside of the ultraviolet absorbing base material.
The dimming member according to any one of claims 1 to 9.

An infrared cut film is provided outside the ultraviolet absorbing base material.
The dimming member according to any one of claims 1 to 10.