KR100673805B1 - 스멕틱 액정 고콘트라스트 스위칭 또는 디스플레이 장치 - Google Patents
스멕틱 액정 고콘트라스트 스위칭 또는 디스플레이 장치 Download PDFInfo
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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
- G02F1/139—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 orientation effects in which the liquid crystal remains transparent
- G02F1/141—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 orientation effects in which the liquid crystal remains transparent using ferroelectric liquid crystals
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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
- G02F1/133—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
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- G—PHYSICS
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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
- G02F1/139—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 orientation effects in which the liquid crystal remains transparent
- G02F1/141—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 orientation effects in which the liquid crystal remains transparent using ferroelectric liquid crystals
- G02F1/1416—Details of the smectic layer structure, e.g. bookshelf, chevron, C1 and C2
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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
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
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Abstract
Description
능동 매트릭스 LCD는 통상 TN(트위스티드 네마틱), ECB(전기적으로 조절된 복굴절), VA(수직 정렬), IPS(평면내 스위칭) 또는 OCB(광학 보상된 굴곡) 모드의 네마틱 액정으로 작동한다. 각각의 경우, 능동 매트릭스는 각각의 화소에 대한 개별 강도의 전기장을 생성시켜 정렬 변화 및 복굴절 변화를 생성시키며, 이는 편광에서 광학적으로 가시화된다. 이들 공정의 심각한 단점은 비디오 성능이 불량하다는 점이다. 즉, 네마틱 액정의 응답 시간이 지나치게 느리다. 특히, 네막틱 LCD는, 예를 들면, 스에오카 등의 문헌[참조: K. Sueoka, H. Nakamura and Y. Taira, SIA 1997, p.203-206, ISSN 1083-1312/97/1701-0203]에 기재된 바와 같이 급격한 이동 화면을 표시할 수 없다.
이러한 이유와 기타 이유로, 강유전성 액정 재료와 능동 매트릭스 부재의 조합을 토대로 하는 액정 디스플레이가, 예를 들면, WO 97/12355와 문헌[참조: in Ferroelectrics 1996, 179, 141-152; 및 by W.J.A.M. Hartmann(IEEE Trans. Electron. Devices 1989, 36, 9; Pt. 1, pp. 1895-9, and Dissertation, Eindhoven, The Netherland, 1990]에 제안되지만, 제한된 온도 범위와 스멕틱 텍스쳐의 재현 곤란으로 인해 실용화되지 못했다.
하트만(Hartmann)이 실질적으로 연속적인 그레이 스케일을 디스플레이하는 반면, 니토(Noto) 등은, 문헌(참조: Journal 08 the SID, 1/2, 1993, pp. 163-169)에서 단안정성 FLC 지오메트리를 제안하고 있는데, 당해 지오메트리에서는 단 하나의 안정성 위치가 초래되도록 비교적 높은 전압을 사용하여 FLC 물질을 정렬시키는데, 이에 따라 후속적으로 박막 트랜지스터에 의해 전기장을 인가하면 다수의 중간 상태가 발생한다. 이러한 중간 상태들은 셀 지오메트리가 교차된 편광자들 사이에서 매칭되는 경우의 다수의 상이한 휘도 값(그레이 스케일)에 상응한다.
| 혼합물 | [M1] | [B] | 상 서열 |
| 중량% | 상, 온도(℃) | ||
| P | 75 | 25 | C 85.3 A 90.6 N 108 I |
| Q | 66 | 34 | C 85.6 (NAC) 85.6 N 115 I |
| R | 60 | 40 | C 85.6 N 116 I |
| S | 55 | 45 | C 86.5 N 119 I |
| T | 50 | 50 | C 87 N 122 I |
| U | 20 | 80 | C 92.7 N 145 I |
| 혼합물 | 90중량% | 성분 A를 10중량% 포함하는 상 서열 | smA-상의 폭 |
| 상, 온도(℃) | ℃ | ||
| PA | P | C 82.6 A 94.3 N 103 I | 11.7 |
| QA | Q | C 85.5 A 93.0 N 106 I | 7.5 |
| RA | R | C 86.8 A 92.5 N 109 I | 5.7 |
| SA | S | C 88.2 A 90.6 N 112 I | 2.4 |
| TA | T | C 88.5 (NAC) 88.5 N 114 I | 0.0 |
| UA | U | smA 상 없음 | 0.0 |
| 성분 | V | W | X |
| C1 | 14.4% | 7.2% | |
| C2 | 14.4% | 7.2% | |
| C3 | 14.4% | 7.2% | |
| C4 | 14.4% | 21.6% | 28.8% |
| C5 | 14.4% | 21.6% | 28.8% |
| C6 | 14.4% | 21.6% | 28.8% |
| C7 | 10.0% | 10.0% | 10.0% |
| C8 | 3.6% | 3.6% | 3.6% |
| 10V, 60Hz | |||||||||
| 혼합물 | Tc | ΔSa | Ps(nC/cm2), 25℃ | ΘTc-10 | ρ | Σ | Σ/Θ | Δ | w=Δ/Θ |
| V | 62.8 | 1.5 | 3.7 | 19.9 | - | 19.9 | 1.0 | 0 | 0 |
| W | 56.1 | 0 | 4.8 | 23.1 | 3.6 | 13.7 | 0.59 | 9.4 | 0.41 |
| X | 59.2 | 0 | 5.9 | 23.9 | 4 | 12.2 | 0.51 | 11.7 | 0.49 |
| 혼합물 | Tc | ΔSa |
| W | 59 | 4 |
| X | 62 | 2.5 |
| 전압(V) | 혼합물 W의 투과율(%) | 혼합물 X의 투과율(%) |
| 0 | 0 | 0 |
| 0.5 | 2 | 14.8 |
| 1 | 5.4 | 24.2 |
| 1.5 | 12 | 40.2 |
| 2 | 21.4 | 48.4 |
| 2.5 | 38.2 | 53.8 |
| 3 | 48.4 | 57.6 |
| 3.5 | 54 | 60.4 |
| 4 | 59.6 | 63.2 |
| 4.5 | 63.2 | 65 |
| 5 | 65.8 | 66.6 |
| 8 | 71.2 | 69.6 |
| 10 | 72.2 | 70 |
Claims (11)
- 액정 혼합물에서의 경사각(Θ)에 대한, 마찰 방향과 스멕틱 층 법선과의 사이의 각 (Δ)의 비(Δ/Θ)가 0.41 이상임을 특징으로 하거나, 액정 혼합물이 상 서열 I-N-C를 갖고, 마찰 방향과 단안정성 위치 사이의 각(ρ)이 1° 이상임을 특징으로 하거나, 액정 혼합물이 상 서열 I-N-C를 갖고 광학 활성 스멕틱 상의 존재 범위의 상한 온도인 Tc보다 15℃ 낮은 온도에서 측정된 경사각과 Tc보다 5℃ 낮은 온도에서 측정된 경사각의 차가 9.5° 미만임을 특징으로 하는, 키랄성 스멕틱 액정 혼합물을 단안정성 정렬 상태로 포함하는 액정 스위칭 또는 디스플레이 장치.
- 제1항에 있어서, 액정 혼합물이 상 서열 I-N-C를 갖고, 25℃에서의 경사각(Θ)이 19 내지 39°임을 특징으로 하는, 액정 스위칭 또는 디스플레이 장치.
- 제1항 또는 제2항에 있어서, 액정 혼합물의 자발 분극치가 150nC/cm2 미만임을 특징으로 하는, 액정 스위칭 또는 디스플레이 장치.
- 제1항 또는 제2항에 있어서, 능동 매트릭스 또는 수동 매트릭스 디스플레이임을 특징으로 하는, 액정 스위칭 또는 디스플레이 장치.
- 제1항에 있어서, 키랄성 스멕틱 액정 혼합물이,상 서열 I-N-C를 갖고,Tc가 50℃를 초과하며,TNI가 105℃ 미만이고,경사각(25℃)이 19° 초과 39° 미만이고,자발 분극치가 150nC/cm2 미만이고,콜레스테릭 나선 피치가 2㎛를 초과하고,광학 활성 스멕틱 상의 존재 범위의 상한 온도인 Tc보다 15℃ 낮은 온도에서 측정된 경사각과 Tc보다 5℃ 낮은 온도에서 측정된 경사각의 차가 9.5° 미만임을 특징으로 하는, 액정 스위칭 또는 디스플레이 장치.
- 제5항에 있어서, 액정 혼합물 중의 질소 또는 황 함유 헤테로사이클릭 화합물의 총 함량이 20중량% 이상임을 특징으로 하는, 액정 스위칭 또는 디스플레이 장치.
- 제6항에 있어서, 액정 혼합물이 하나 이상의 티오펜 유도체를 함유함을 특징으로 하는, 액정 스위칭 또는 디스플레이 장치.
- 스멕틱 A 유도제를, 전체 액정 혼합물을 기준으로 하여, 10중량% 첨가하면, 5.5℃ 미만의 smA 상 범위가 유도되고, 전체 액정 혼합물을 기준으로 하여, 25중량% 첨가하면, 0.1℃ 이상의 smA 상 범위가 유도됨을 특징으로 하는, 상 서열 I-N-C를 갖는 키랄성 스멕틱 액정 혼합물.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19934798.0 | 1999-07-28 | ||
| DE19934798A DE19934798A1 (de) | 1999-07-28 | 1999-07-28 | Smektische Flüssigkristallschalt- oder Anzeigevorrichtung mit hohem Kontrast |
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| Publication Number | Publication Date |
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| KR20020041406A KR20020041406A (ko) | 2002-06-01 |
| KR100673805B1 true KR100673805B1 (ko) | 2007-01-25 |
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| US (1) | US7019811B1 (ko) |
| EP (1) | EP1208182B1 (ko) |
| JP (1) | JP4700244B2 (ko) |
| KR (1) | KR100673805B1 (ko) |
| CN (1) | CN1196767C (ko) |
| DE (2) | DE19934798A1 (ko) |
| WO (1) | WO2001007535A1 (ko) |
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| DE19934799B4 (de) * | 1999-07-28 | 2008-01-24 | Az Electronic Materials (Germany) Gmbh | Chiral-smektische Flüssigkristallmischung und ihre Verwendung in Aktivmatrix-Displays mit hohen Kontrastwerten |
| JP5391538B2 (ja) * | 2006-10-05 | 2014-01-15 | 大日本印刷株式会社 | 液晶表示素子の製造方法 |
| CN104520763B (zh) * | 2012-06-25 | 2017-12-05 | 汉阳大学校产学协力团 | 液晶显示装置 |
| CN103666482B (zh) * | 2012-09-10 | 2016-05-25 | 苏州汉朗光电有限公司 | 一种近晶a相液晶材料 |
| PL240079B1 (pl) * | 2017-10-31 | 2022-02-14 | Wojskowa Akad Tech | Smektyczna mieszanina ciekłokrystaliczna domieszkowana związkami jonowymi, sposób jej otrzymywania oraz jej zastosowanie |
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| US4941736A (en) * | 1985-04-23 | 1990-07-17 | Canon Kabushiki Kaisha | Ferroelectric liquid crystal device and driving method therefor |
| JP2713513B2 (ja) * | 1991-08-29 | 1998-02-16 | シャープ株式会社 | 液晶表示装置 |
| JPH05102227A (ja) * | 1991-10-07 | 1993-04-23 | Seiko Epson Corp | 半導体製造装置 |
| DE69216548T2 (de) * | 1991-10-30 | 1997-07-31 | Canon Kk | Flüssigkristallvorrichtung und Anzeigevorrichtung |
| ATE233800T1 (de) * | 1991-11-22 | 2003-03-15 | Canon Kk | Flüssigkristallzusammensetzung, flüssigkristallvorrichtung und anzeigevorrichtung |
| JPH05216034A (ja) * | 1992-01-31 | 1993-08-27 | Canon Inc | 強誘電性液晶素子 |
| JP2994854B2 (ja) * | 1992-05-15 | 1999-12-27 | キヤノン株式会社 | 液晶組成物およびこれを用いる液晶素子 |
| JP3000504B2 (ja) * | 1992-12-29 | 2000-01-17 | キヤノン株式会社 | 液晶素子 |
| US5629788A (en) * | 1992-12-29 | 1997-05-13 | Canon Kabushiki Kaisha | Liquid crystal device providing tilt angle inclination angle and ps satisfying relationships at 55 degrees |
| US5547605A (en) * | 1993-12-15 | 1996-08-20 | Hoechst Aktiengesellschaft | 2-Aryloxytetrafluoropropionic esters, process for their preparation, and their use in liquid-crystalline mixtures |
| JPH10510066A (ja) | 1995-09-25 | 1998-09-29 | フィリップス エレクトロニクス ネムローゼ フェンノートシャップ | 表示装置 |
| JPH11125843A (ja) * | 1997-10-24 | 1999-05-11 | Canon Inc | 液晶素子及び液晶表示装置 |
| US6577289B1 (en) * | 1999-03-26 | 2003-06-10 | Canon Kabushiki Kaisha | Liquid crystal device and display apparatus including the device |
| JP2001019960A (ja) * | 1999-07-08 | 2001-01-23 | Nec Corp | スメクティック液晶材料及び液晶光学素子 |
-
1999
- 1999-07-28 DE DE19934798A patent/DE19934798A1/de not_active Withdrawn
-
2000
- 2000-07-24 EP EP00951437A patent/EP1208182B1/de not_active Expired - Lifetime
- 2000-07-24 CN CNB008108633A patent/CN1196767C/zh not_active Expired - Fee Related
- 2000-07-24 KR KR1020027001101A patent/KR100673805B1/ko not_active Expired - Fee Related
- 2000-07-24 JP JP2001512807A patent/JP4700244B2/ja not_active Expired - Fee Related
- 2000-07-24 US US10/048,104 patent/US7019811B1/en not_active Expired - Fee Related
- 2000-07-24 WO PCT/EP2000/007075 patent/WO2001007535A1/de not_active Ceased
- 2000-07-24 DE DE50005447T patent/DE50005447D1/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1196767C (zh) | 2005-04-13 |
| CN1364187A (zh) | 2002-08-14 |
| EP1208182A1 (de) | 2002-05-29 |
| US7019811B1 (en) | 2006-03-28 |
| EP1208182B1 (de) | 2004-02-25 |
| DE50005447D1 (de) | 2004-04-01 |
| KR20020041406A (ko) | 2002-06-01 |
| JP4700244B2 (ja) | 2011-06-15 |
| WO2001007535A1 (de) | 2001-02-01 |
| DE19934798A1 (de) | 2001-02-01 |
| JP2003505729A (ja) | 2003-02-12 |
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