JP6152399B2 - High contrast bistable scattering type liquid crystal light valve - Google Patents
High contrast bistable scattering type liquid crystal light valve Download PDFInfo
- Publication number
- JP6152399B2 JP6152399B2 JP2015074791A JP2015074791A JP6152399B2 JP 6152399 B2 JP6152399 B2 JP 6152399B2 JP 2015074791 A JP2015074791 A JP 2015074791A JP 2015074791 A JP2015074791 A JP 2015074791A JP 6152399 B2 JP6152399 B2 JP 6152399B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- voltage
- azobenzene
- light valve
- cholesteric liquid
- 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.)
- Active
Links
Landscapes
- Liquid Crystal (AREA)
Description
本発明は、高コントラスト双安定散乱型液晶ライトバルブに関し、特に、透明／散乱型スマートウィンドウ（Transparent/scattering Smart Window）関連分野の技術に応用し、その特徴は、印加電圧の振幅を固定すれば、低周波又は直流電圧の印加により、液晶光バルブの散乱状態を得ることができ、且つ印加電圧をオフにした後も該散乱状態を持続維持することができ、高周波電圧の印加により、液晶光バルブに透過状態を呈させることができ、電圧の印加をオフにした後も透過状態を維持することができる。一方で、選定された周波数が低いほど、散乱状態に切り換えるのに要する電圧振幅が低くなり、選定された周波数が高いほど、透過状態に切り換えるのに要する電圧振幅が低くなることにある。この技術は、エネルギーの消耗を大幅に節減することができ、実用性が極めて良好な発明である。 The present invention relates to a high-contrast bistable scattering type liquid crystal light valve, and in particular, it is applied to a technology related to a transparent / scattering type smart window (Transparent / scattering Smart Window). The scattering state of the liquid crystal light valve can be obtained by applying a low frequency or a DC voltage, and the scattering state can be continuously maintained even after the applied voltage is turned off. The valve can be made transparent, and the transparent state can be maintained even after the voltage application is turned off. On the other hand, the lower the selected frequency, the lower the voltage amplitude required to switch to the scattering state, and the higher the selected frequency, the lower the voltage amplitude required to switch to the transmissive state. This technology can greatly reduce energy consumption, and is an extremely practical invention.
液晶光バルブ中の液晶が指すのは、液晶であり、液体の流動性及び結晶体の規則的配列性を兼ね備える材料であり、従って、液体結晶体と称される。液晶光バルブは、液晶分子材料が基本要素であり、この白濁の液晶分子を配向処理した２枚のガラス板の間に挟み、現在主流であり、人々の日常生活に関連する液晶光バルブに組み合わせることができ、即ち、液晶表示器の技術に応用される。この固体と液体の間に介する中間体分子は、液体の外力の作用を受け易い流動の特性を有するだけでなく、結晶体特有の光学異方性を有するので、印加電場を利用して液晶の配列状態をその他の指向へ変化させることができ、光線が液晶層を透過する時の光学特性に変化を発生させ、これは、印加する電場を利用して光の変調現象を発生させることであり、液晶の光電効果と称される。この効果を利用して、各式の液晶表示器、例えば、ツイストネマティック液晶表示器、超ツイストネマティック液晶表示器、薄膜トランジスタ液晶表示器等を製造することができる。 The liquid crystal in the liquid crystal light valve refers to a liquid crystal, which is a material having both the fluidity of liquid and the regular alignment of crystals, and is therefore referred to as a liquid crystal. The liquid crystal light valve is basically composed of liquid crystal molecular material, and this cloudy liquid crystal molecule is sandwiched between two glass plates that have been subjected to alignment treatment. The liquid crystal light valve is currently mainstream and can be combined with liquid crystal light valves related to people's daily life. That is, it can be applied to the technology of liquid crystal displays. The intermediate molecule interposed between the solid and the liquid not only has a flow characteristic that is easily affected by the external force of the liquid, but also has an optical anisotropy specific to the crystal, so that an applied electric field is used for the liquid crystal. The alignment state can be changed to other orientations, causing a change in the optical characteristics when light rays pass through the liquid crystal layer, which is to generate a light modulation phenomenon using the applied electric field. This is called the photoelectric effect of liquid crystal. By utilizing this effect, liquid crystal displays of various types, for example, twisted nematic liquid crystal displays, super twisted nematic liquid crystal displays, thin film transistor liquid crystal displays, and the like can be manufactured.
また、現在の科学技術の発展により、液晶技術が日増しに成熟し、多種の液晶散乱光バルブ技術の成功した研究があり、ＰＤＬＣ(polymer dispersed liquid crystals、ポリマー分散型液晶)のようであり、その多数は、ＵＶ光又は加熱を利用して液晶及びポリマーに相分離を発生させ、電圧を印加することにより散乱状態及び透過状態の切り換えを得ることができ、一般の散乱型光バルブは、電圧の印加を持続して初めてその光バルブの透過度を切り換えることができ、この方式の供給は、エネルギー上の消費を招き易い。更に、液晶光バルブは、コレステリック液晶であり、それは、電圧の印加を利用して、散乱状態、透過状態、反射状態の間で相互に切り換えるが、その切り換えに必要な電圧が相対して高く、且つ切り換え過程において、透過度が容易に安定度不足の現象を発生し、中華民国専利公告第Ｉ４３９７７３号『反射式液晶表示器及びその製造方法』は、第１基板、第２基板、液晶層、第１配向層、及び第２配向層を含む。第１基板及び第２基板は、相対設置され、液晶層が第１基板及び第２基板の間に設置される。液晶層は、複数の液晶分子を含み、一部の波長の光を反射させ、一部の波長の光透過を透過させることに用いられる。第２配向層は、第１基板の第２基板に向き合う内側に設置され、液晶層を透過した光線を吸収し、液晶分子に対して配向することに用いられる。 In addition, with the development of current science and technology, liquid crystal technology has matured day by day, and there have been successful studies of various liquid crystal scattering light valve technologies, like PDLC (polymer dispersed liquid crystals), Many of them use UV light or heating to cause phase separation in liquid crystals and polymers, and can be switched between a scattering state and a transmission state by applying a voltage. The transmittance of the light valve can be switched only after the application of the light is applied, and this type of supply tends to cause energy consumption. Furthermore, the liquid crystal light valve is a cholesteric liquid crystal, which uses voltage application to switch between the scattering state, the transmission state, and the reflection state, but the voltage required for the switching is relatively high, In addition, in the switching process, the transparency easily causes a phenomenon of insufficient stability, and the Chinese exclusive patent notice No. I439773 “Reflective liquid crystal display and manufacturing method thereof” includes the first substrate, the second substrate, the liquid crystal layer, A first alignment layer and a second alignment layer are included. The first substrate and the second substrate are disposed relative to each other, and the liquid crystal layer is disposed between the first substrate and the second substrate. The liquid crystal layer includes a plurality of liquid crystal molecules, and is used for reflecting light having some wavelengths and transmitting light having some wavelengths. The second alignment layer is disposed on the inner side of the first substrate facing the second substrate, and is used to absorb the light transmitted through the liquid crystal layer and align it with respect to the liquid crystal molecules.
上記に列挙する『反射式液晶表示器及びその製造方法』の特徴は、黒色液晶配向層により透過光を吸収し、対比及び色飽和度を向上し、同時に工程を簡易化する目的を達成するが、それが必要な操作の電圧が相対して高くなり、且つ大きな面積の光バルブが透過及び散乱状態の間の切り換えが比較的安定せず、従って、コレステリック液晶は、現在の天窓、自動車のガラス、投影スクリーン等の関連製品の応用に適合しない。 The characteristics of the above-mentioned “reflective liquid crystal display and its manufacturing method” are to achieve the purpose of absorbing the transmitted light by the black liquid crystal alignment layer, improving the contrast and color saturation, and simultaneously simplifying the process. The operation voltage it requires is relatively high, and the large area light valve is relatively unstable in switching between transmission and scattering states, so cholesteric liquid crystals are used in current skylights, automotive glass Not suitable for application of related products such as projection screens.
上記状況に鑑み、本発明者は、多くの時間を関連知識の研究に投入し、各項の優劣を比較し、関連製品の研究及び開発を行い、多数回の実験及び試験を経て、上記欠陥を改善し、大衆が必要とする使用に適合する『高いコントラスト双安定散乱型液晶光バルブ』をようやく開発している。 In view of the above situation, the inventor has invested a lot of time in research of related knowledge, compared the superiority of each item, researched and developed related products, and after many experiments and tests, We have finally developed a “high-contrast bistable liquid crystal light valve” that meets the needs of the general public.
本発明の目的は、印加電圧の進入及び除去後に何れも内部に形成される散乱状態又は透過状態を維持することができ、エネルギー上の過度の消耗を減少するとともに、高コントラスト、低操作電圧及び双安定の特性を維持し、周知技術が列挙する欠陥を改善することにある。 The object of the present invention is to maintain the scattering state or transmission state formed inside both after entering and removing the applied voltage, reducing excessive energy consumption, high contrast, low operating voltage and The aim is to maintain the bistable characteristics and to improve the deficiencies listed in the known art.
本発明の高コントラスト双安定散乱型液晶光バルブは、２つの基板と、前記２つの基板の間に設置され、それぞれ前記基板に貼合される透明な電極層と、前記電極層の間に挟持される中間層であって、該中間層は、複数のギャップと、複数のネマティック液晶及びキラルアゾベンゼン分子と相互にドープ混合されたアゾベンゼンコレステリック液晶と、を含む中間層と、各前記電極層と前記中間層との間に塗布される垂直配向膜と、を含み、そのうち、前記アゾベンゾコレステリック液晶の添加によって、異なる周波数の高さの印加電圧を前記電極層から注入後に前記アゾベンゾコレステリック液晶の透過度を変化させ、且つ前記印加電圧を除去した後に散乱状態又は透過状態を安定して維持し、エネルギーの消耗を大幅に減少することができる。 The high-contrast bistable scattering type liquid crystal light valve of the present invention is provided between two substrates, a transparent electrode layer that is installed between the two substrates, and is bonded to the substrate, and is sandwiched between the electrode layers. An intermediate layer comprising a plurality of gaps, a plurality of nematic liquid crystals and an azobenzene cholesteric liquid crystal mixed with a chiral azobenzene molecule, and each of the electrode layers and the intermediate layer. A vertical alignment film applied between the intermediate layer and the transmission of the azobenzocholesteric liquid crystal after injecting an applied voltage of different frequency from the electrode layer by adding the azobenzocholesteric liquid crystal. It is possible to maintain the scattering state or the transmission state stably after removing the applied voltage and greatly reduce the energy consumption. That.
本発明の更なる技術特徴として、該印加電圧は、低周波電圧を該電極層に電気接続するものである。 As a further technical feature of the present invention, the applied voltage electrically connects a low frequency voltage to the electrode layer.
本発明の更なる技術特徴として、該印加電圧は、高周波電圧を該電極層に電気接続するものである。 As a further technical feature of the present invention, the applied voltage electrically connects a high frequency voltage to the electrode layer.
本発明の更なる技術特徴として、該印加電圧は、直流電圧を該電極層に電気接続するものである。 As a further technical feature of the present invention, the applied voltage electrically connects a DC voltage to the electrode layer.
本発明の高コントラスト双安定散乱型液晶光バルブは、印加電圧の進入及び除去後に何れも内部に形成される散乱状態又は透過状態を維持することができ、エネルギー上の過度の消耗を減少するとともに、高コントラスト、低操作電圧及び双安定の特性を維持し、周知技術が列挙する欠陥を改善する。 The high-contrast bistable scattering type liquid crystal light valve of the present invention can maintain the scattering state or the transmission state formed inside both after entering and removing the applied voltage, reducing excessive energy consumption. Maintains the characteristics of high contrast, low operating voltage and bistable, and improves the defects enumerated by known techniques.
本発明が採用する技術、手段及びその効果について、好適実施例を挙げ、図面を合わせて詳細を説明した後、本発明の上記の目的、構造及び特徴を深く、具体的に理解できると考える。以下に好適実施形態により説明するが、本発明に対して如何なる形式上の制限を加えるものでもなく、図１〜図６に示すように、本発明の高コントラスト双安定散乱型液晶光バルブは、２つの基板１と、それぞれ該２つの基板１の相対する一側に設置され、それぞれ各該基板１に貼合する２つの透明な電極層２と、該２つの電極層２の間に挟持される中間層３であって、該中間層３は、複数のギャップ３１と、複数のネマティック液晶及びキラルアゾベンゼン分子と相互にドープ混合されたアゾベンゼンコレステリック液晶３２と、を含む中間層３と、それぞれ各該電極層２及び該中間層３の間に塗布される２つの垂直配向膜４と、を含み、そのうち、該アゾベンゾコレステリック液晶３２の添加によって、異なる周波数の高さの印加電圧を該２つの電極層から注入後に該アゾベンゾコレステリック液晶の透過度を変化させ、且つ該印加電圧を除去した後に散乱状態又は透過状態を安定して維持し、エネルギーの消耗を大幅に減少することができる。 The technology, means and effects adopted by the present invention will be described in detail with reference to the preferred embodiments and the drawings, and then the above objects, structures and features of the present invention will be understood in detail. The present invention will be described below with reference to preferred embodiments. However, the present invention does not impose any formal limitation. As shown in FIGS. 1 to 6, the high-contrast bistable scattering type liquid crystal light valve of the present invention includes: Two substrates 1 and two transparent electrode layers 2 that are respectively installed on opposite sides of the two substrates 1 and bonded to the substrates 1 are sandwiched between the two electrode layers 2. Each of the intermediate layers 3 including a plurality of gaps 31 and a plurality of nematic liquid crystals and an azobenzene cholesteric liquid crystal 32 mixed with chiral azobenzene molecules. Two vertical alignment films 4 applied between the electrode layer 2 and the intermediate layer 3, and among them, by applying the azobenzocholesteric liquid crystal 32, an applied voltage having a different frequency can be applied. It is possible to change the transmittance of the azobenzocholesteric liquid crystal after injection from two electrode layers, and to stably maintain the scattering state or the transmission state after removing the applied voltage, thereby greatly reducing energy consumption. .
現在、市場の液晶光バルブにおいて、一般的に内部の材料は、ただ液晶を使用するか、液晶ドープの一般のキラル分子又は重合体を使用するが、その結果は、何れも該電圧印加後に散乱型又は透過型（いわゆる散乱型及び透過型は該分野の周知の技術名詞であり、ここでは、詳細を説明しない）を得ることができるが、印加電圧除去後、液晶光バルブ内部に形成される散乱及び透過状態は、維持できず、外部電圧の供給を持続して初めて散乱及び透過状態に保持することができ、このように、膨大なエネルギー上の損耗をもたらすだけであり、従って、本発明の該中間層３内において、該アゾベンゼンコレステリック液晶３２の注入により、そのうち、キラルドーパント(chiral dopant)は、液晶分子螺子構造の材料を提供し、ネマティック液晶をコレステリック液晶(cholesterics)に変換させることができ、アゾベンゼンキラル分子は、元のキラル分子内にアゼンゼン(Azobenzol)を添加し、アゾベンゼンは、最も簡単な芳香族アゾ化合物であり、多くのアゾ染料の母体構造であり、そのうち、２つのベンゼン基は、それぞれアゾ基-N=N-の両端が互いに接続された構造を含む。 Currently, in a liquid crystal light valve on the market, the internal material generally uses only liquid crystal or a general chiral molecule or polymer doped with liquid crystal. A type or transmission type (so-called scattering type and transmission type are well-known technical nouns in the field and will not be described in detail here), but is formed inside the liquid crystal light valve after removing the applied voltage. The scattering and transmission states cannot be maintained and can only be maintained in the scattering and transmission state after the external voltage supply has been sustained, thus only resulting in enormous energy wear and thus the present invention. In the intermediate layer 3, by injection of the azobenzene cholesteric liquid crystal 32, a chiral dopant provides a material of a liquid crystal molecular screw structure, and nematic liquid crystal Azobenzene chiral molecules can be converted into cholesteric liquid crystals, with the addition of Azobenzol within the original chiral molecule, azobenzene is the simplest aromatic azo compound, and the base of many azo dyes Among them, two benzene groups each include a structure in which both ends of an azo group —N═N— are connected to each other.
続いて、本発明は、該アゾベンゼンコレステリック液晶３２に含まれるアゾベンゼン成分ドーパント重量％が相当いので、キラル分子の旋転力が相当弱く、従って、該印加電圧は、低周波電圧５を該２つの電極層２に接続するものであり、且つ該低周波電圧５を該中間層３内に印加して発生する変化は、コレステリック液晶手形構造３３(fingerprint textures)を生成し、この手形構造の螺旋軸方向は一致せず、故に多くの小さなドメイン(domain)を呈現し、可視光を散乱させるに十分であり、図２、図３に示すように、このように、光線の照射は、可視光を散乱させることができ、即ち、「散乱状態」を形成する；該低周波電圧５以外、もう１つの実施例は、該印加電圧は、高周波電圧６を該２つの電極層２に電気接続するものであり、本発明は、該低周波電圧５の印加を経て、該２つの電極層２上から除去した後、散乱状態を維持し、また、該低周波電圧５を印加し、除去した後、更に該高周波電圧６を印加する場合、該コレステリック液晶手形構造３３の小ドメインを拡大させ、このように、光線を該基板１に直接透過させることができ、即ち、「透過状態」を形成し、図４、図５に示すように、アゾベンゼンキラル分子の添加によってエネルギー上の持続消耗を減少することができる。また、該印加電圧は、直流電圧７であり、該アゾベンゼンコレステリック液晶３２の手形構造を変化させ、その効果は、該低周波電圧５と同一であり、図６を参照し、上記を総合し、それは、印加電圧の振幅の大きさを固定することができ、印加電圧の周波数を変化させて液晶光バルブの透過及び散乱状態を切り換え、そのうち、該低周波電圧５又は該直流電圧７を印加して該２つの電極層２に電気接続し、液晶光バルブを散乱状態に切り換えることができる。印加電圧の周波数を該高周波電圧６に変化させ、液晶光バルブを透過状態に切り換えることができる。そのうち、切り換えに要する周波数は、印加電圧の振幅の大きさにより決定される。印加する振幅を３０Ｖに固定する場合、周波数が２００Ｈｚより低い時、散乱状態を呈し、２００Ｈｚより高い時、周波数の増加に従って透過度を増加し、約３００Ｈｚになる時に最高の透過度に達し、図６、図７、図８に示すとおりである。 Subsequently, according to the present invention, since the azobenzene component dopant weight% contained in the azobenzene cholesteric liquid crystal 32 is considerable, the rotational force of the chiral molecule is considerably weak. Therefore, the applied voltage applies the low frequency voltage 5 to the two electrodes. The change that occurs when the low frequency voltage 5 is applied in the intermediate layer 3 is connected to the layer 2 and produces cholesteric liquid crystal handprint structures 33 (fingerprint textures). Do not match, and thus exhibit many small domains and are sufficient to scatter visible light, and as shown in FIG. 2 and FIG. 3, irradiation of light thus scatters visible light. In other embodiments, other than the low frequency voltage 5, the applied voltage is an electrical connection of the high frequency voltage 6 to the two electrode layers 2. The present invention provides the After removing from the two electrode layers 2 through the application of the frequency voltage 5, the scattering state is maintained, and after the low frequency voltage 5 is applied and removed, the high frequency voltage 6 is further applied. , The small domain of the cholesteric liquid crystal handprint structure 33 can be enlarged, and thus the light beam can be directly transmitted to the substrate 1, that is, form a “transmission state”, as shown in FIGS. By adding an azobenzene chiral molecule, energy consumption can be reduced. The applied voltage is a DC voltage 7, which changes the bill structure of the azobenzene cholesteric liquid crystal 32. The effect is the same as that of the low frequency voltage 5, and referring to FIG. It can fix the magnitude of the amplitude of the applied voltage and change the transmission and scattering state of the liquid crystal light valve by changing the frequency of the applied voltage, of which the low frequency voltage 5 or the DC voltage 7 is applied. Thus, the liquid crystal light valve can be switched to the scattering state by being electrically connected to the two electrode layers 2. By changing the frequency of the applied voltage to the high frequency voltage 6, the liquid crystal light valve can be switched to the transmissive state. Of these, the frequency required for switching is determined by the magnitude of the amplitude of the applied voltage. When the applied amplitude is fixed at 30 V, it exhibits a scattering state when the frequency is lower than 200 Hz, and when it is higher than 200 Hz, the transmittance increases as the frequency increases, and reaches the highest transmittance when the frequency reaches about 300 Hz. 6, FIG. 7, and FIG.
一般に、コレステリック液晶は、アゾベンゼン旋光性材料を添加する時、アゾベンゼン旋光物質の光異性化効果を利用し、その旋光性を低減させ、ＵＶ露光エネルギー量を制御し、異なる選択的反射光波帯機能を呈現する。紫外光の照射時、アゾベンゼンtrans-cis光異性化行為は、コレステロール相及び等方性相の相転移を変化させ、光学現象上、光透過状態を発生させ、且つ熱源を加えるか、直流電場を印加し、ラビングの効果を達成することができ、回復可能特性を有するので、光読み書き及びラビングの効果を有する。この発明は、垂直配向された液晶ケース内にネガ型液晶ドープアゾベンゼンキラル分子を利用したアゾベンゼンコレステリック液晶３２を注入し、従って、該低周波電圧５、該直流電圧７又は該高周波電圧６の注入及び除去により、該アゾベンゼンコレステリック液晶３２の変化に散乱状態又は透過状態を維持させることができ、これにより、電圧注入の浪費を減少することができ、更に、図７に示すように、本発明の異なる固定周波数で印加電圧を変化して測定される透過比率の説明図において、低周波の印加電圧であるほど、比較的低い振幅の電圧を利用して液晶光バルブを散乱状態に切り換えることができることを明確に理解できる。また、図８に示すように、固定電圧を印加して周波数を変化させる時に測定される透過説明図において、高周波電圧であるほど、透過度が高いことを理解することができる。 In general, cholesteric liquid crystals utilize the photoisomerization effect of azobenzene optically-rotating substances when adding azobenzene optically-rotating materials, reduce their optical rotation, control the amount of UV exposure energy, and have different selective reflected waveband functions. Present. Upon irradiation with ultraviolet light, the azobenzene trans-cis photoisomerization action changes the phase transition of the cholesterol phase and the isotropic phase, causing an optical transmission state and applying a heat source or applying a DC electric field. Applying and rubbing effect can be achieved, and since it has recoverable characteristics, it has optical reading and writing and rubbing effects. The present invention injects an azobenzene cholesteric liquid crystal 32 utilizing negative liquid crystal doped azobenzene chiral molecules into a vertically aligned liquid crystal case, and therefore injection of the low frequency voltage 5, the DC voltage 7 or the high frequency voltage 6 and By removing, the change of the azobenzene cholesteric liquid crystal 32 can be maintained in a scattering state or a transmission state, thereby reducing the waste of voltage injection, and further, as shown in FIG. In the explanatory diagram of the transmission ratio measured by changing the applied voltage at a fixed frequency, the liquid crystal light valve can be switched to the scattering state by using a relatively low amplitude voltage as the applied voltage is lower. Understand clearly. In addition, as shown in FIG. 8, in the transmission explanatory diagram measured when changing the frequency by applying a fixed voltage, it can be understood that the higher the voltage, the higher the transmittance.
また、本発明の該２つの基板１の使用において、ガラス又はプラスチックであることができるが、該２つの基板１の材質は、使用上、上記に制限するものではなく、それは、使用者の要求する使用に応じて、適合する材質を選択することができ、また、該２つの透明な電極層２及び各該ギャップ３１の使用において材質上の使用を制限するものでもなく、且つ該垂直配向膜４は、液晶垂直配向を提供可能な任意の材料により置き換えることもでき、例えば、ポリイミド垂直配向膜、ＤＭＯＡＰ垂直配向膜、液晶中にドープされ、自発的垂直配向のナノボール等を提供する。上記は、ただ本発明の好適実施例を解釈することに用いるだけであり、本発明に対して如何なる形式上の制限をなすことを意図するものでなく、従って、同一の発明精神の下で行われる本発明の任意の修飾又は変更がある場合、その他の実施可能な形態であり、且つ同一効果を有するものは、依然として何れも本発明の保護の範疇内に含まれるべきである。 Further, in the use of the two substrates 1 of the present invention, it can be glass or plastic, but the material of the two substrates 1 is not limited to the above in terms of use, and it is requested by the user. Depending on the use, a suitable material can be selected, and the use of the two transparent electrode layers 2 and the gaps 31 does not limit the use of the material, and the vertical alignment film 4 can be replaced by any material capable of providing liquid crystal vertical alignment, for example, a polyimide vertical alignment film, a DMOAP vertical alignment film, a nanoball with spontaneous vertical alignment doped in a liquid crystal, and the like. The foregoing is only used to interpret the preferred embodiment of the present invention and is not intended to impose any formal limitations on the present invention, and therefore is subject to the same inventive spirit. If there are any modifications or alterations of the present invention, any other possible form and having the same effect should still fall within the scope of protection of the present invention.
以上の説明は、本発明の好適な実施形態を示したものであり、本発明を限定するものではない。従って、本発明の主旨を逸脱しない範囲における修飾または変更は、全て、本発明の保護範囲に含まれる。 The above description shows preferred embodiments of the present invention and does not limit the present invention. Accordingly, all modifications or changes within the scope not departing from the gist of the present invention are included in the protection scope of the present invention.
１ 基板
２ 電極層
３ 中間層
３１ ギャップ
３２ アゾベンゼンコレステリック液晶
３３ コレステリック液晶手形構造
４ 垂直配向膜
５ 低周波電圧
６ 高周波電圧
７ 直流電圧
DESCRIPTION OF SYMBOLS 1 Substrate 2 Electrode layer 3 Intermediate layer 31 Gap 32 Azobenzene cholesteric liquid crystal 33 Cholesteric liquid crystal bill structure 4 Vertical alignment film 5 Low frequency voltage 6 High frequency voltage 7 DC voltage
Claims (1)
前記２つの基板の間に設けられ、それぞれ前記基板に貼合される透明の電極層と、
前記電極層の間に挟み設けられ、複数のギャップと、ネマティック液晶及びアゾベンゼンキラル分子が相互にドープ混合された複数のアゾベンゼンコレステリック液晶と、を含む中間層と、
各前記電極層と前記中間層との間に塗布される垂直配向膜と、
を含み、
前記アゾベンゼンコレステリック液晶の添加によって、異なる周波数の高さの印加電圧を前記電極層から注入後に前記アゾベンゼンコレステリック液晶の透過度を変化させ、且つ前記印加電圧を除去した後に散乱状態又は透過状態を維持し、
前記印加電圧として低周波電圧又は直流電圧を前記電極層に印加することで前記アゾベンゼンコレステリック液晶を散乱状態とし、
前記印加電圧として高周波電圧を印加することで前記アゾベンゼンコレステリック液晶を透過状態とする
ことを特徴とする高コントラスト双安定散乱型液晶ライトバルブ。 Two substrates,
A transparent electrode layer provided between the two substrates, each bonded to the substrate;
An intermediate layer provided between the electrode layers, and including a plurality of gaps, and a plurality of azobenzene cholesteric liquid crystals in which nematic liquid crystals and azobenzene chiral molecules are doped and mixed with each other;
A vertical alignment film applied between each of the electrode layers and the intermediate layer;
Including
Maintained by the addition of the azobenzene cholesteric liquid crystal, different frequencies of the height of the applied voltage to change the permeability of the Azoben Zen cholesteric liquid after injection from the electrode layer, and a scattering state or a transmission state after removing the applied voltage And
The azobenzene cholesteric liquid crystal is in a scattering state by applying a low frequency voltage or a direct current voltage to the electrode layer as the applied voltage,
Applying a high frequency voltage as the applied voltage makes the azobenzene cholesteric liquid crystal in a transmissive state.
High contrast bistable scattering-type liquid crystal light valve, characterized in that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015074791A JP6152399B2 (en) | 2015-04-01 | 2015-04-01 | High contrast bistable scattering type liquid crystal light valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015074791A JP6152399B2 (en) | 2015-04-01 | 2015-04-01 | High contrast bistable scattering type liquid crystal light valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2016194627A JP2016194627A (en) | 2016-11-17 |
| JP6152399B2 true JP6152399B2 (en) | 2017-06-21 |
Family
ID=57323657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2015074791A Active JP6152399B2 (en) | 2015-04-01 | 2015-04-01 | High contrast bistable scattering type liquid crystal light valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6152399B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6957944B2 (en) * | 2017-04-05 | 2021-11-02 | 凸版印刷株式会社 | Liquid crystal dimming device and liquid crystal dimming method |
| JP7438505B2 (en) * | 2019-08-08 | 2024-02-27 | 日産自動車株式会社 | display device |
| JP7786177B2 (en) * | 2021-12-10 | 2025-12-16 | Ｔｏｐｐａｎホールディングス株式会社 | Light-adjusting sheet |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50158582A (en) * | 1974-06-12 | 1975-12-22 | ||
| JPS5157188A (en) * | 1974-11-14 | 1976-05-19 | Nippon Telegraph & Telephone | MATORITSUKUSUGATAEKISHOCHIKUZOSOCHI |
| EP0123981A3 (en) * | 1983-04-29 | 1986-12-03 | F. HOFFMANN-LA ROCHE & CO. Aktiengesellschaft | Liquid crystal cell |
| US7771614B2 (en) * | 2007-11-26 | 2010-08-10 | Altierre Corporation | Low power bistable device and method |
| TW201033713A (en) * | 2009-03-03 | 2010-09-16 | Wintek Corp | Reflective color-changing liquid crystal display |
-
2015
- 2015-04-01 JP JP2015074791A patent/JP6152399B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2016194627A (en) | 2016-11-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Sun et al. | Recent advances in polymer network liquid crystal spatial light modulators | |
| Kumar et al. | Advanced bistable cholesteric light shutter with dual frequency nematic liquid crystal | |
| Hu et al. | Liquid crystal gratings based on alternate TN and PA photoalignment | |
| Meng et al. | Normally transparent smart window with haze enhancement via inhomogeneous alignment surface | |
| Xu et al. | Refraction effect in an in-plane-switching blue phase liquid crystal cell | |
| Li et al. | Preparation of highly durable reverse-mode polymer-stabilized liquid crystal films with polymer walls | |
| Goda et al. | Optical switching in guest–host liquid crystal devices driven by photo-and thermal isomerisation of azobenzene | |
| Ren et al. | Gradient polymer network liquid crystal with a large refractive index change | |
| Cheng et al. | Electrically switchable and permanently stable light scattering modes by dynamic fingerprint chiral textures | |
| CN115768849B (en) | Pressure sensitive adhesive and liquid crystal cell | |
| Lin et al. | Mechanism of scattering bistable light valves based on salt-doped cholesteric liquid crystals | |
| JP6152399B2 (en) | High contrast bistable scattering type liquid crystal light valve | |
| Lee et al. | Polarizer-free liquid crystal display with electrically switchable microlens array | |
| Shin et al. | Patterned waveguide liquid crystal displays | |
| Yuan et al. | Low-driving-voltage, polarizer-free, scattering-controllable liquid crystal device based on randomly patterned photo-alignment | |
| Chaudhary et al. | Liquid crystals alignment with PbS nanosculptured thin films | |
| CN101288020B (en) | Liquid crystal display device using nematic liquid crystal | |
| KR20110032216A (en) | Dual mode liquid crystal display and manufacturing method thereof | |
| Eun Jung et al. | Optical property enhancement of dye‐PDLC using active reflector structure | |
| KR20210076532A (en) | Liquid crystal cell | |
| Ahmad et al. | Advancement trends in dye-doped polymer dispersed liquid crystals—a survey review | |
| Jin et al. | An effective way to achieve full color cholesteric liquid crystal displays with single liquid crystal mixture and layer | |
| US7499124B2 (en) | Polymer dispersed liquid crystal device conditioned with a predetermined anchoring energy, a predetermined polymer concentration by weight percent and a predetermined cell gap to enhance phase separation and to make smaller and more uniform liquid crystal droplets | |
| Kim et al. | A vertical-field-driven polymer-stabilized blue phase liquid crystal mode to obtain a higher transmittance and lower driving voltage | |
| JP2002146353A (en) | Liquid crystal optical materials using polymer networks formed from polymerizable disc-shaped monomers |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20160906 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20160914 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20161201 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20170502 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20170529 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 6152399 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |