KR20210116614A - 고분자 네트워크 액정 스마트 윈도우 장치 및 이의 제조 방법 - Google Patents
고분자 네트워크 액정 스마트 윈도우 장치 및 이의 제조 방법 Download PDFInfo
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- KR20210116614A KR20210116614A KR1020217026570A KR20217026570A KR20210116614A KR 20210116614 A KR20210116614 A KR 20210116614A KR 1020217026570 A KR1020217026570 A KR 1020217026570A KR 20217026570 A KR20217026570 A KR 20217026570A KR 20210116614 A KR20210116614 A KR 20210116614A
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- liquid crystal
- optical shutter
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- polymer network
- electric field
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Images
Classifications
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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
- G02F1/13718—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 based on a change of the texture state of a cholesteric liquid crystal
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
- E06B2009/2464—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds featuring transparency control by applying voltage, e.g. LCD, electrochromic panels
-
- 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
- G02F2202/00—Materials and properties
- G02F2202/36—Micro- or nanomaterials
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Abstract
Description
도 1b는 본 개시내용의 개념에 따른 광학적으로 불투명한 포컬 코닉 상태의 광 셔터를 도시하는 광 셔터의 단면도이다.
도 2는 본원에 기재된 광 셔터의 자가-방전 및 이의 투명에서 불투명한 광학 상태로의 전이를 나타내는 그래프이다.
도 3은 본원에 기재된 광 셔터의 초저 소비 전력을 위해 역 극성의 간헐적 DC 펄스를 사용한 전기 구동 방식을 나타내는 그래프이다.
도 4는 외부 전원 공급의 부재 하에 불투명한 및 투명한 광학 상태의, 본원에 기재된, 광 셔터 장치의 사진이다.
도 5는 본원에 기재된 광 셔터 장치의 헤이즈 수준 측정을 도시하는 그래프이다.
도 6은 본원에 기재된 광 셔터 장치의 소비 전력을 결정하는 데 필요한 인가된 AC 전압 및 생성된 전류의 측정을 나타내는 그래프이다.
Claims (21)
- 광 셔터(light shutter)로서,
전극면을 획정하는 한 쌍의 대향하는 투명 전극;
포컬 코닉 상태(focal conic state)의 액정 및 전극면에 수직으로 배향된 복수의 고분자 네트워크 도메인을 포함하는 고분자 네트워크를 포함하는 고분자 복합재를 포함하며,
고분자 복합재는 투명 전극 사이에 배치되고 투명 전극과 전기적으로 연통되며, 고분자 복합재는 적어도 하나의 액정 화합물, 키랄 도펀트 및 적어도 하나의 반응성 메조겐(reactive mesogen) 조성물을 포함하며;
여기서 고분자 복합재에 대한 전기장의 인가는 액정을 포컬 코닉 상태에서 수직방향으로 배향된 투명한 상태로 전환시키는, 광 셔터. - 제1항에 있어서, 포컬 코닉 상태 액정이 약 0.38 μm 내지 한 쌍의 대향하는 투명 전극 사이의 갭의 길이의 약 절반의 콜레스테릭 피치(cholesteric pitch)를 갖는, 광 셔터.
- 제1항에 있어서, 반응성 메조겐 조성물이 적어도 하나의 반응성 메조겐 및 광-개시제를 포함하는, 광 셔터.
- 제1항에 있어서, 한 쌍의 대향하는 투명 전극과 전기적으로 연통되는 전원을 추가로 포함하는, 광 셔텨.
- 제1항에 있어서, 적어도 하나의 배향막(alignment layer)을 추가로 포함하는, 광 셔터.
- 제1항에 있어서, 유전막(dielectric layer)을 추가로 포함하는, 광 셔터.
- 제6항에 있어서, 유전막이 투명성 무기 물질을 포함하는, 광 셔터.
- 제1항에 있어서, 약 50분 내지 약 70분의 RC 시상수(τ)를 갖는, 광 셔터.
- 제1항에 있어서, 반대 극성 DC 펄스의 주기적 인가로 인해 투명한 상태를 유지하는, 광 셔터.
- 제1항에 있어서, 60 Hz AC의 주파수 아래에서 3 V/μm에서 약 0.03 W/m2 내지 약 0.04 W/m2를 소비하는, 광 셔터.
- 제1항에 있어서, 투명한 상태가 외부 전기장에 의해 유지되는, 광 셔터.
- 제1항에 있어서, 내부에 저장된 전기장으로 적어도 약 30분 동안 투명한 상태를 유지하는, 광 셔터.
- 제1항에 있어서, 적어도 하나의 액정 화합물이 양의 유전 이방성 액정 화합물인, 광 셔터.
- 제1항에 있어서, 완속 방전 커패시터로서 기능하는, 광 셔터.
- 제1항에 있어서, 적어도 하나의 반응성 메조겐의 농도가 약 0.1 중량% 내지 약 40 중량%인, 광 셔터.
- 제1항에 있어서, 투명도에 영향을 미치기에 충분한 전압의 양이 60 Hz AC의 주파수 아래에서 3 V/μm 미만인, 광 셔터.
- 제1항에 있어서, 고분자 네트워크가 약 0.01 중량% 내지 약 2.0 중량%의 이온-포획 나노입자를 추가로 포함하고; 여기서 이온-포획 나노입자가 NiO 및 TiO2를 포함하고; 여기서 이온-포획 나노입자의 첨가는 광 셔터의 저소비 전력 및 작동 안정성을 유지하는, 광 셔터.
- 제1항 내지 제17항 중 어느 한 항의 광 셔터의 제조 방법으로서,
한 쌍의 대향하는 투명 전극 사이의 미경화 고분자 복합재에 반응성 메조겐 조성물, 적어도 하나의 액정 화합물 및 키랄 도펀트를 배치하는 단계;
60 Hz에서 약 50 mV/μm 내지 약 50 V/μm 범위의 외부 전기장의 존재 하에 고분자 복합재를 중합하여 고분자 네트워크를 형성하는 단계로서, 여기서 적어도 하나의 액정 화합물 및 키랄 도펀트가 콜레스테릭 액정을 형성하는, 단계; 및
경화 후 외부 전기장을 제거하는 단계로서, 여기서 콜레스테릭 액정이 포컬 코닉 산란 상태로 재배향되는, 단계
를 포함하는, 광셔터의 제조 방법. - 제18항에 있어서, 고분자 네트워크가 이온-포획 나노입자를 추가로 포함하고, 여기서 이온-포획 나노입자가 NiO 및 TiO2를 포함하는, 제조 방법.
- 제18항에 있어서, 반응성 메조겐을 중합하는 단계가 경화된 고분자 복합재 내에 고분자 네트워크를 형성하는 것을 포함하는, 제조 방법.
- 제18항에 있어서, 고분자 네트워크를 형성하는 단계가 고분자 네트워크를 인가된 외부 전기장에 평행하게 배향하는 것을 포함하는, 제조 방법.
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PCT/US2020/014654 WO2020154433A1 (en) | 2019-01-22 | 2020-01-22 | Polymer networked liquid crystal smart window device and methods of making the same |
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JP7615526B2 (ja) * | 2019-11-01 | 2025-01-17 | Toppanホールディングス株式会社 | 調光装置 |
US20240338000A1 (en) * | 2021-07-16 | 2024-10-10 | Corning Incorporated | Methods for in situ control of tinted windows and control apparatuses |
JP2025513706A (ja) * | 2022-03-29 | 2025-04-30 | 日東電工株式会社 | メソゲンリガンドを含むポリマーマトリックス及びそれを含む光シャッター |
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US8913215B2 (en) * | 2008-03-24 | 2014-12-16 | Kent State University | Bistable switchable liquid crystal window |
WO2009118909A1 (ja) * | 2008-03-28 | 2009-10-01 | 富士通株式会社 | コレステリック液晶パネルの多階調駆動回路、駆動方法および表示装置 |
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