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CN107577068A - 一种变色调光液晶器件及其光调节方法 - Google Patents

一种变色调光液晶器件及其光调节方法 Download PDF

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CN107577068A
CN107577068A CN201710714176.7A CN201710714176A CN107577068A CN 107577068 A CN107577068 A CN 107577068A CN 201710714176 A CN201710714176 A CN 201710714176A CN 107577068 A CN107577068 A CN 107577068A
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liquid crystal
crystal device
dichroic dye
light
discoloration
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周国富
詹媛媛
迪克·杨·波尔
刘丹青
阿尔伯特·斯凯宁
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Shenzhen Guohua Optoelectronics Co Ltd
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Shenzhen Guohua Optoelectronics Co Ltd
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Priority to CN201710714176.7A priority Critical patent/CN107577068A/zh
Publication of CN107577068A publication Critical patent/CN107577068A/zh
Priority to PCT/CN2018/094857 priority patent/WO2019033871A1/zh
Priority to US16/481,083 priority patent/US20200133036A1/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
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    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
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    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133738—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers for homogeneous alignment
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    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133742—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers for homeotropic alignment
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    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/13706—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering the liquid crystal having positive dielectric anisotropy
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    • G02—OPTICS
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    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/13712—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering the liquid crystal having negative dielectric anisotropy
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    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
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    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/13756—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering the liquid crystal selectively assuming a light-scattering state
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Abstract

本发明公开了一种变色调光液晶器件及其光调节方法，在相对设置的基板之间填充有主体液晶和二色性染料，在未通电状态下，主体液晶在取向层的诱导下发生特定的排列取向，在通电状态下，主体液晶发生再取向，二色性染料分子伴随着主体液晶的再取向发生转动，从而散射可见光波段的入射光，宏观上由透光状态转变为光散射状态，呈现出二色性染料在主体液晶中的颜色，进而实现光线的调节。本发明提供的变色液晶调光器件由于不含聚合物网络的存在，不需要聚合过程且不存在聚合物老化现象，降低了生产成本，增加了调光液晶器件的使用寿命。

Description

一种变色调光液晶器件及其光调节方法
技术领域
本发明涉及显示技术领域，具体涉及一种变色调光液晶器件及其光调节方法。
背景技术
电致变色智能窗，是通过电压控制玻璃透光率，并使其颜色发生快速变化，该项技术在节能环保等领域具有良好的应用前景。现有彩色智能窗技术大都基于聚合物分散液晶(PDLC)或聚合物稳定液晶(PSLC)体系的，这两种体系都是通过将二色性染料分子添加至主体液晶及光引发剂等混合物中后聚合所得的聚合物网络，体系中二色性染料分子的排列在聚合过程中易受到反应单体分子迁移带来的影响，导致后期分子排列不规整，故染料分子在通电前处于呈现较明显的散射状态，与通电后的颜色对比度不大。由于其所用的聚合物材料成本较高，故智能窗的价格相对而言一直居高不下，其价格目前为每平方米数千元人民币，同时由于存在聚合反应等过程，故制备过程耗时久，且由于有机聚合物的老化现象，大大减少了智能窗的使用寿命。
发明内容
本发明所要解决的技术问题是提供一种变色调光器件，已解决现有技术中因使用含有聚合物网络体系导致的通电前后颜色对比度不大、制备过程耗时久、生产成本高、使用寿命低的问题。
本发明所采取的技术方案是：
本发明提供一种变色调光液晶器件，包括相对设置的两块基板，所述基板包括由外到内依次设置的透光基板、导电层和取向层，两块所述基板的取向层相对设置，在两块所述基板之间形成调节区，所述调节区内填充有液晶混合物，所述液晶混合物包括主体液晶与二色性染料，所述主体液晶具有介电各向异性。
在一些实施例中，所述主体液晶为负性液晶，所述取向层为垂直取向层。
在另一些实施例中，所述主体液晶为正性液晶，所述取向层为平行取向层。
优选地，所述取向层为聚酰亚胺取向层。
优选地，所述液晶混合物包括90.0wt％-99.99wt％的主体液晶和0.01wt％-10.0wt％的二色性染料。
优选地，所述二色性染料为荧光绿、紫色二色性染料、橘色二色性染料中的至少一种。
优选地，所述调节区的高度为5μm～50μm。
优选地，所述调节区还填充有用于支撑所述调节区高度的间隔子。
优选地，还包括电源组件，所述电源组件的两极分别与两个所述导电层电性连接。
进一步地，所述电源组件的工作电压为7V～50V。
进一步地，所述电源组件的工作频率为50Hz～1000Hz。
本发明还提供一种上述的变色调光液晶器件的光调节方法，通过施加的交流电压控制主体液晶由一种特定的取向排列转变成另一种取向排列，发生再取向，液晶混合物本身含有的杂质离子及所述变色调光液晶器件在交流电场中产生的离子在基板之间来回运动打乱了主体液晶的取向排列，使二色性染料与液晶分子发生转动，进而调节可见光的透射与散射，从而实现光线的调节。
本发明的有益效果是：
本发明提供一种变色调光液晶器件，填充有主体液晶和二色性染料，在未通电状态下，主体液晶在取向层的诱导下呈特定取向排列，在通电状态下，主体液晶发生再取向排列，二色性染料分子伴随着主体液晶的再取向发生转动，同时二色性染料和主体液晶中含有的极少量杂质也能够伴随着主体液晶再取向排列发生电动力学不稳定现象，取向层被电场激发形成的离子也能参与到电动力学不稳定现象中，进而使得二色性染料分子呈现混乱排列，从而散射可见光波段的入射光，呈现出二色性染料在主体液晶中的颜色，进而实现光线的调节。本发明提供的变色调光液晶器件在达到光调节的前提下，由于体系中没有聚合物网络的存在，直接将主体液晶与二色性染料混合后灌入液晶盒中即可，制备过程简单，不需要利用反应单体，不需要聚合过程且不存在聚合物老化现象，降低了生产成本，增加了调光液晶器件的使用寿命。
附图说明
图1为未通电状态时，变色调光液晶器件的结构示意图；
图2为通电状态时，变色调光液晶器件的结构示意图。
具体实施方式
以下将结合实施例和附图对本发明的构思、具体结构及产生的技术效果进行清楚、完整地描述，以充分地理解本发明的目的、特征和效果。显然，所描述的实施例只是本发明的一部分实施例，而不是全部实施例，基于本发明的实施例，本领域的技术人员在不付出创造性劳动的前提下所获得的其他实施例，均属于本发明保护的范围。
实施例1
本发明提供一种变色调光液晶器件，其结构示意图如图1所示，包括相对设置的基板一和基板二，所述基板一包括依次设置的透明玻璃基板一10、ITO导电层一11和聚酰亚胺垂直取向层一12，所述基板二包括依次设置有透明玻璃基板二20、ITO导电层二21和聚酰亚胺垂直取向层二22，所述基板一的聚酰亚胺垂直取向层12与所述基板二的聚酰亚胺垂直取向层22相对设置，所述基板一与基板二之间形成调节区3，所述基板调节区的高度为50μm，所述调节区3内填充有液晶混合物，所述液晶混合物包括负性液晶4和荧光绿5，所述液晶混合物中荧光绿5的质量分数为0.01％，在未通电电状态下，所述负性液晶4在聚酰亚胺垂直取向层的诱导下发生垂直于透明玻璃基板的取向排列，可见光6能够从透明玻璃基板中透射出来，从而呈现透光状态。
本发明还提供一种上述变色调光液晶器件的光调节方法，参见图2，ITO导电层一11与ITO导电层二21之间接入电源组件，所述电源组件的工作电压为7V，工作频率为50Hz，通过电压控制负性液晶4发生再取向，由未通电状态时垂直于基板的取向排列转变为平行于基板的取向排列，同时填充的荧光绿5分子在形成的交流电场中伴随着负性液晶的再取向发生转动，同时随着体系中杂质离子的快速运动呈现无规则运动，当接入的电压达到一定值以后，液晶混合物会发生类似“湍流”的运动模式，宏观上由透光状态转变为光散射状态，呈现出荧光绿5在负性液晶4中的颜色，进而实现光线的调节。由于填充的液晶混合物由于只有小分子，因此本发明提供的变色调光液晶器件的驱动电压要比基于聚合物网络的器件要小，采用生活中家用电器的交流电即可，不需要特殊频率的设备进行驱动，方便投入到家用。本实施例以荧光绿为例进行说明，实际填充的二色性染料为荧光绿、紫色二色性染料、橘色二色性染料中的至少一种，填充二色性染料的混合混合物时可以通过调节不同染料的配比使制备出的变色调光液晶器件呈现出不同的颜色。
实施例2
本实施例提供一种变色调光液晶器件，其结构与实施例1相同，不同之处在于：所述调光区之间的高度为5μm，所述取向层为聚酰亚胺平行取向层，所述液晶混合物为正性液晶和紫色二色性染料，本实施例中使用的紫色二色性染料型号为RL013，所述液晶混合物中紫色二色性染料的质量分数为10％，所述取向层为聚酰亚胺平行取向层，所述变色调光液晶器件接入电压为25V频率为50Hz的电源组件而处于通电状态。本实施例提供的变色调光液晶器件在未通电状态下，正性液晶在聚酰亚胺平行取向层的诱导作用下发生平行于基板的取向排列，在接入电源组件而处于通电状态时，通过施加的交流电压控制正性液晶发生再取向，由平行于透明玻璃基板的取向排列转变成垂直于透明玻璃基板的取向排列，紫色二色性染料伴随着正性液晶的再取向发生转动，同时正性液晶和二色性染料中含有的极少量杂质也能够伴随着正性液晶再取向排列发生电动学不稳定现象，进而使得二色性染料分子呈现混乱排列，取向层被电场激发形成的离子也能参与到电动学不稳定现象中，进而加剧了正性液晶由特定取向排列转变成无规则排列，从而控制可见光的透过与散射，实现光线的调节。
实施例3
本实施例提供一种变色调光液晶器件，其结构与实施例1相同，不同之处在于：所述调光区之间的高度为25μm，所述液晶混合物为负性液晶和橘色二色性染料，本实施例中使用的橘色二色性染料的型号为RL002，所述液晶混合物中橘色二色性染料的质量分数为5％，所述变色调光液晶器件接入电压为50V频率为1000Hz的电源组件而处于通电状态。
实施例4
本实施例提供一种变色调光液晶器件，其结构与实施例1相同，不同之处在于：所述调光区之间的高度为40μm，所述液晶混合物为负性液晶、紫色二色性染料RL013和橘色二色性染料RL002，所述液晶混合物中紫色二色性染料RL013和橘色二色性染料RL002的混合染料的质量分数为8％，所述变色调光液晶器件接入电压为10V频率为500Hz的电源组件而处于通电状态。

Claims (10)

1.一种变色调光液晶器件，其特征在于，包括相对设置的两块基板，所述基板包括由外到内依次设置的透光基板、导电层和取向层，两块所述基板的取向层相对设置，在两块所述基板之间形成调节区，所述调节区内填充有液晶混合物，所述液晶混合物包括主体液晶与二色性染料，所述主体液晶具有介电各向异性。
2.根据权利要求1所述的变色调光液晶器件，其特征在于，所述主体液晶为负性液晶，所述取向层为垂直取向层。
3.根据权利要求1所述的变色调光液晶器件，其特征在于，所述主体液晶为正性液晶，所述取向层为平行取向层。
4.根据权利要求1所述的变色调光液晶器件，其特征在于，所述液晶混合物包括90.0wt％-99.99wt％的主体液晶和0.01wt％-10.0wt％的二色性染料。
5.根据权利要求1-4任一项所述的变色调光液晶器件，其特征在于，所述二色性染料为荧光绿、紫色二色性染料、橘色二色性染料中的至少一种。
6.根据权利要求1-4任一项所述的变色调光液晶器件，其特征在于，所述调节区的高度为5μm～50μm。
7.根据权利要求1-4任一项所述的变色调光液晶器件，其特征在于，还包括电源组件，所述电源组件的两极分别与两个所述导电层电性连接。
8.根据权利要求7所述的变色调光液晶器件，其特征在于，所述电源组件的工作电压为7V～50V。
9.根据权利要求7所述的变色调光液晶器件方法，其特征在于，所述电源组件的工作频率为50Hz～1000Hz。
10.权利要求1-9任一项所述的变色调光液晶器件的光调节方法，其特征在于，通过施加的交流电压控制主体液晶由一种特定的取向排列转变成另一种取向排列，发生再取向，液晶混合物本身含有的杂质离子及所述变色调光液晶器件在交流电场中产生的离子在基板之间来回运动打乱了主体液晶的取向排列，使二色性染料与液晶分子发生转动，进而调节可见光的透射与散射，从而实现光线的调节。
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