公开(公告)号：JP2006144024A

公开(公告)日：2006-06-08

申请号：JP2005368894

申请日：2005-12-21

Applicant: Displaytech Inc ,  Hoechst Ag ,  ディスプレイテック,インコーポレイテッドDisplaytech, Incorporated ,  ヘキスト・アクチェンゲゼルシャフトHoechst Aktiengesellschaft

Inventor： WAND MICHAEL D ,  HANDSCHY MARK ,  ESCHER CLAUS ,  VOHRA ROHINI T

IPC: C09K19/02 ,  C07C69/92 ,  C07D213/30 ,  C07D213/64 ,  C07D213/65 ,  C07D239/26 ,  C07D239/34 ,  C07D239/38 ,  C07D303/24 ,  C07D405/12 ,  C09K19/04 ,  C09K19/12 ,  C09K19/20 ,  C09K19/34 ,  C09K19/54 ,  C09K19/58 ,  G02F1/13 ,  G02F1/1337 ,  G02F1/141

CPC classification number: C07C69/92 ,  C07D213/30 ,  C07D213/64 ,  C07D213/65 ,  C07D239/26 ,  C07D239/34 ,  C07D239/38 ,  C07D303/24 ,  C07D405/12 ,  C09K19/0225 ,  C09K19/04 ,  C09K19/126 ,  C09K19/2021 ,  C09K19/3441 ,  C09K19/586 ,  C09K19/588 ,  G02F1/141 ,  G02F2001/1414

Abstract: PROBLEM TO BE SOLVED: To provide fast response, high contrast distorted helix ferroelectric liquid crystal devices, and to provide ferroelectric liquid crystal compositions useful therein. SOLUTION: In a distorted helix ferroelectric liquid crystal cell in which a ferromagnetic liquid crystal layer having a known thickness is disposed between electrodes at least whose one is transparent or semi-transparent, the optical anisotropy of the device is changed by applying an electric voltage to the electrodes through the later. The ferroelectric liquid crystal having the layer exhibits a ferroelectric phase, and further exhibits a chiral nematic phase at higher temperatures than temperatures exhibiting the ferroelectric phase. Since the natural helix pitch of the ferroelectric liquid crystal is sufficiently shorter than the thickness of the ferroelectric liquid crystal layer of the device in the ferroelectric phase, the ferroelectric liquid crystal has a helix-arranged vector structure and does not have a stable surface. Since the natural helix pitch of the ferroelectric liquid crystal is sufficiently longer than the thickness of the ferroelectric liquid crystal layer of the device in the nematic phase, the ferroelectric liquid crystal layer of the device is easily arranged. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：提供快速响应，高对比度变形的螺旋铁电液晶器件，并提供其中有用的铁电液晶组合物。 解决方案：在其中具有已知厚度的铁磁性液晶层至少设置为透明或半透明的电极之间的扭曲螺旋铁电液晶单元中，通过施加光学各向异性 通过电极对电极的电压。 具有该层的铁电液晶呈现铁电相，并且在比显示铁电相的温度高的温度下还显示手性向列相。 由于铁电液晶的自然螺旋线距离铁电体相中的器件的铁电液晶层的厚度充分短，所以铁电液晶具有螺旋排列的矢量结构，不具有稳定的表面。 由于铁电液晶的自然螺旋间距比在向列相中的器件的铁电液晶层的厚度充分长，因此容易布置该器件的铁电液晶层。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2006079110A

公开(公告)日：2006-03-23

申请号：JP2005285568

申请日：2005-09-29

Applicant: Displaytech Inc ,  Hoechst Ag ,  ディスプレイテック,インコーポレイテッドDisplaytech, Incorporated ,  ヘキスト・アクチェンゲゼルシャフトHoechst Aktiengesellschaft

Inventor： WAND MICHAEL D ,  HANDSCHY MARK ,  ESCHER CLAUS ,  VOHRA ROHINI T

IPC: G02F1/141 ,  C07C69/92 ,  C07D213/30 ,  C07D213/64 ,  C07D213/65 ,  C07D239/26 ,  C07D239/34 ,  C07D239/38 ,  C07D303/24 ,  C07D405/12 ,  C09K19/02 ,  C09K19/04 ,  C09K19/12 ,  C09K19/20 ,  C09K19/34 ,  C09K19/54 ,  C09K19/58 ,  G02F1/13 ,  G02F1/1337

CPC classification number: C07C69/92 ,  C07D213/30 ,  C07D213/64 ,  C07D213/65 ,  C07D239/26 ,  C07D239/34 ,  C07D239/38 ,  C07D303/24 ,  C07D405/12 ,  C09K19/0225 ,  C09K19/04 ,  C09K19/126 ,  C09K19/2021 ,  C09K19/3441 ,  C09K19/586 ,  C09K19/588 ,  G02F1/141 ,  G02F2001/1414

Abstract: PROBLEM TO BE SOLVED: To provide a distorted helix effect electro-optic device having fast response and high contrast and to provide a ferroelectric liquid crystal composition used therefor. SOLUTION: A distorted helix ferroelectric liquid crystal cell is provided with a ferroelectric liquid crystal layer with well-known thickness held between a plurality of electrode plates at least one of which is transparent or semi-transparent, wherein the optical anisotropy of the device is varied by applying a voltage onto the electrode plates through the ferroelectric liquid crystal layer. The ferroelectric liquid crystal having the layer exhibits a ferroelectric phase and exhibits a chiral nematic phase at a temperature higher than the temperature of the ferroelectric phase. The natural helix pitch of the ferroelectric liquid crystal in the ferroelectric phase is sufficiently tighter than the thickness of the ferroelectric liquid crystal layer of the device, the ferroelectric liquid crystal has a helical director structure and is not surface-stabilized. In the nematic phase, the natural helix pitch of the ferroelectric liquid crystal is sufficiently greater than the thickness of the ferroelectric liquid crystal layer to facilitate alignment of the ferroelectric liquid crystal layer in the device. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：提供具有快速响应和高对比度的扭曲的螺旋效应电光装置，并提供用于其的铁电液晶组合物。 解决方案：扭曲的螺旋铁电液晶单元设置有铁电液晶层，具有公知的厚度保持在多个电极板之间，其中至少一个电极板是透明或半透明的，其中光学各向异性 通过铁电液晶层在电极板上施加电压来改变器件。 具有该层的铁电液晶呈现铁电相，并且在比铁电相的温度高的温度下显示手性向列相。 铁电相中铁电液晶的天然螺旋线距离装置的铁电液晶层的厚度足够紧，铁电液晶具有螺旋导向器结构并且不是表面稳定的。 在向列相中，强电介质液晶的天然螺旋螺距足够大于强电介质液晶层的厚度，以便于强电介质液晶层在器件中的取向。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2004318172A

公开(公告)日：2004-11-11

申请号：JP2004178960

申请日：2004-06-16

Applicant: Displaytech Inc ,  Hoechst Ag ,  ディスプレイテック,インコーポレイテッドDisplaytech, Incorporated ,  ヘキスト・アクチェンゲゼルシャフトHoechst Aktiengesellschaft

Inventor： WAND MICHAEL D ,  HANDSCHY MARK ,  ESCHER CLAUS ,  VOHRA ROHINI T

IPC: C07C69/92 ,  C07D213/30 ,  C07D213/64 ,  C07D213/65 ,  C07D239/26 ,  C07D239/34 ,  C07D239/38 ,  C07D303/24 ,  C07D405/12 ,  C09K19/02 ,  C09K19/04 ,  C09K19/12 ,  C09K19/20 ,  C09K19/34 ,  C09K19/54 ,  C09K19/58 ,  G02F1/13 ,  G02F1/1337 ,  G02F1/141

CPC classification number: C07C69/92 ,  C07D213/30 ,  C07D213/64 ,  C07D213/65 ,  C07D239/26 ,  C07D239/34 ,  C07D239/38 ,  C07D303/24 ,  C07D405/12 ,  C09K19/0225 ,  C09K19/04 ,  C09K19/126 ,  C09K19/2021 ,  C09K19/3441 ,  C09K19/586 ,  C09K19/588 ,  G02F1/141 ,  G02F2001/1414

Abstract: PROBLEM TO BE SOLVED: To provide a distorted helix ferroelectric liquid crystal device with fast response and high contrast and a ferroelectric liquid crystal composition used therefor. SOLUTION: In a distorted helix ferroelectric liquid crystal cell comprising a ferroelectric liquid crystal layer with known thickness disposed between a plurality of electrode plates of which at least one is transparent or translucent, optical anisotropy of the device is varied by applying voltage to the electrode plates via the layer. The ferroelectric liquid crystal constituting the layer exhibits a ferroelectric phase and exhibits a chiral nematic phase at a temperature higher than that at which a ferroelectric phase is exhibited. In the ferroelectric phase, as a natural helical pitch of the ferroelectric liquid crystal is sufficiently tighter than the thickness of the ferroelectric liquid crystal layer in the device, the ferroelectric liquid crystal has a helix orientated vector structure and is not surface-stabilized. In the nematic phase, as the natural helical pitch of the ferroelectric liquid crystal is sufficiently greater than the thickness of the ferroelectric liquid crystal layer to facilitate alignment of the ferroelectric crystal layer in the device. COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：提供具有快速响应和高对比度的扭曲螺旋铁电液晶装置和用于其的铁电液晶组合物。 解决方案：在具有已知厚度的强电介质液晶层的扭曲的铁电液晶单元中，其设置在多个电极板之间，其中至少一个是透明或半透明的，器件的光学各向异性通过施加电压而变化 电极板经过层。 构成该层的铁电液晶呈现铁电相，并且在比显示铁电相的温度高的温度下显示手性向列相。 在铁电相中，由于铁电液晶的天然螺旋间距比装置中的铁电液晶层的厚度充分紧密，所以铁电液晶具有螺旋取向矢量结构，不表面稳定。 在向列相中，由于强电介质液晶的天然螺旋间距足够大于强电介质液晶层的厚度，以便于器件中铁电晶体层的取向。 版权所有（C）2005，JPO＆NCIPI

公开(公告)号：JP2004029717A

公开(公告)日：2004-01-29

申请号：JP2003037499

申请日：2003-02-14

Applicant: Displaytech Inc ,  Hoechst Ag ,  ディスプレイテック,インコーポレイテッドDisplaytech, Incorporated ,  ヘキスト・アクチェンゲゼルシャフトHoechst Aktiengesellschaft

Inventor： WAND MICHAEL D ,  HANDSCHY MARK ,  ESCHER CLAUS ,  VOHRA ROHINI T

IPC: C07C69/92 ,  C07D213/30 ,  C07D213/64 ,  C07D213/65 ,  C07D239/26 ,  C07D239/34 ,  C07D239/38 ,  C07D303/24 ,  C07D405/12 ,  C09K19/02 ,  C09K19/04 ,  C09K19/12 ,  C09K19/20 ,  C09K19/34 ,  C09K19/54 ,  C09K19/58 ,  G02F1/13 ,  G02F1/1337 ,  G02F1/141

CPC classification number: C07C69/92 ,  C07D213/30 ,  C07D213/64 ,  C07D213/65 ,  C07D239/26 ,  C07D239/34 ,  C07D239/38 ,  C07D303/24 ,  C07D405/12 ,  C09K19/0225 ,  C09K19/04 ,  C09K19/126 ,  C09K19/2021 ,  C09K19/3441 ,  C09K19/586 ,  C09K19/588 ,  G02F1/141 ,  G02F2001/1414

Abstract: PROBLEM TO BE SOLVED: To provide a spiral ferroelectric liquid crystal element DHFLC having high responsiveness and high contrast and ferroelectric liquid crystal composition used therefor. SOLUTION: In a spiral ferroelectric liquid crystal cell 10 provided with a ferroelectric liquid crystal layer 15 of known thickness between a plurality of electrodes one of which is at least transparent or semi-transparent, the optical anisotropy of the element is changed by applying voltage across the electrodes via this layer. The layered ferroelectric liquid crystal 15 exhibits a ferroelectric phase, and exhibits a chiral nematic phase at temperatures higher than those at which the ferroelectric phase is exhibited. In the ferroelectric phase, the natural spiral pitch of the ferroelectric liquid crystal is sufficiently shorter than the thickness of the ferroelectric liquid crystal layer 15 of the element, therefore, the ferroelectric liquid crystal has a spirally oriented vector structure and is not stabilized on the surface. In the nematic phase, the natural spiral pitch of the ferroelectric liquid crystal is sufficiently longer than the thickness of the ferroelectric liquid crystal layer 15, therefore, orientation of the ferroelectric liquid crystal layer 15 of the element becomes easy. COPYRIGHT: (C)2004,JPO

公开(公告)号：DE4303335A1

公开(公告)日：1993-08-12

申请号：DE4303335

申请日：1993-02-05

Applicant: DISPLAYTECH INC ,  HOECHST AG

Inventor： DER ERFINDER WIRD NACHTRAEGLICH BENANNT

IPC: C07C69/92 ,  C07D213/30 ,  C07D213/64 ,  C07D213/65 ,  C07D239/26 ,  C07D239/34 ,  C07D239/38 ,  C07D303/24 ,  C07D405/12 ,  C09K19/02 ,  C09K19/04 ,  C09K19/12 ,  C09K19/20 ,  C09K19/34 ,  C09K19/54 ,  C09K19/58 ,  G02F1/13 ,  G02F1/1337 ,  G02F1/141

Abstract: A liquid crystal composition exhibits a ferroelectric phase and a chiral nematic phase at a temperature above that of the ferroelectric phase. The pitch of the natural helix of the chiral nematic phase is at least four times as great as the pitch of the natural helix of the ferroelectric phase. The pitch of the ferroelectric phase is thus sufficiently short to ensure that the liquid crystal has a helical structure when placed between the electrode plates of an electro-optical device while the nematic pitch is sufficiently long to facilitate alignment of the liquid crystal layer. The natural pitch of the ferroelectric phase is preferably less than one tenth of the distance between the electrode plates and the pitch of the nematic phase is preferably eight times the distance between the electrode plates.

公开(公告)号：GB2263982A

公开(公告)日：1993-08-11

申请号：GB9301786

申请日：1993-01-29

Applicant: DISPLAYTECH INC ,  HOECHST AG

Inventor： WAND MICHAEL D ,  HANDSCHY MARK ,  ESCHER CLAUS ,  VOHRA ROHINI

IPC: C07C69/92 ,  C07D213/30 ,  C07D213/64 ,  C07D213/65 ,  C07D239/26 ,  C07D239/34 ,  C07D239/38 ,  C07D303/24 ,  C07D405/12 ,  C09K19/02 ,  C09K19/04 ,  C09K19/12 ,  C09K19/20 ,  C09K19/34 ,  C09K19/54 ,  C09K19/58 ,  G02F1/13 ,  G02F1/1337 ,  G02F1/141 ,  G02F1/137

Abstract: Ferroelectric Liquid Crystals (FLCs) which exhibit a ferroelectric phase and a chiral nematic phase at temperatures above the ferroelectric phase are provided. The natural helix pitch of the FLC in the ferroelectric phase of these materials is sufficiently tighter than the thickness of the FLC layer such that it is not surface-stabilized. The chiral nematic phase has a natural helix pitch sufficiently greater than the cell thickness to facilitate alignment of the FLC in an FLC device to achieve high contrast. The FLCs of this invention are useful in making fast response, high contrast FLC electro-optic devices in which the FLC retains a helical director structure stable to unwinding.

公开(公告)号：GB9300974D0

公开(公告)日：1993-03-10

申请号：GB9300974

申请日：1993-01-19

Applicant: DISPLAYTECH INC

IPC: C07C69/92 ,  C07D213/30 ,  C07D213/64 ,  C07D213/65 ,  C07D239/26 ,  C07D239/34 ,  C07D239/38 ,  C07D303/24 ,  C07D405/12 ,  C09K19/02 ,  C09K19/04 ,  C09K19/12 ,  C09K19/20 ,  C09K19/34 ,  C09K19/54 ,  C09K19/58 ,  G02F1/13 ,  G02F1/1337 ,  G02F1/141

Abstract: Ferroelectric Liquid Crystals (FLCs) which exhibit a ferroelectric phase and a chiral nematic phase at temperatures above the ferroelectric phase are provided. The natural helix pitch of the FLC in the ferroelectric phase of these materials is sufficiently tighter than the thickness of the FLC layer such that it is not surface-stabilized. The chiral nematic phase has a natural helix pitch sufficiently greater than the cell thickness to facilitate alignment of the FLC in an FLC device to achieve high contrast. The FLCs of this invention are useful in making fast response, high contrast FLC electro-optic devices in which the FLC retains a helical director structure stable to unwinding.

公开(公告)号：GB2263982B

公开(公告)日：1996-02-28

申请号：GB9301786

申请日：1993-01-29

Applicant: DISPLAYTECH INC ,  HOECHST AG

Inventor： WAND MICHAEL D ,  HANDSCHY MARK ,  ESCHER CLAUS ,  VOHRA ROHINI

IPC: C07C69/92 ,  C07D213/30 ,  C07D213/64 ,  C07D213/65 ,  C07D239/26 ,  C07D239/34 ,  C07D239/38 ,  C07D303/24 ,  C07D405/12 ,  C09K19/02 ,  C09K19/04 ,  C09K19/12 ,  C09K19/20 ,  C09K19/34 ,  C09K19/54 ,  C09K19/58 ,  G02F1/13 ,  G02F1/1337 ,  G02F1/141

Abstract: Ferroelectric Liquid Crystals (FLCs) which exhibit a ferroelectric phase and a chiral nematic phase at temperatures above the ferroelectric phase are provided. The natural helix pitch of the FLC in the ferroelectric phase of these materials is sufficiently tighter than the thickness of the FLC layer such that it is not surface-stabilized. The chiral nematic phase has a natural helix pitch sufficiently greater than the cell thickness to facilitate alignment of the FLC in an FLC device to achieve high contrast. The FLCs of this invention are useful in making fast response, high contrast FLC electro-optic devices in which the FLC retains a helical director structure stable to unwinding.

公开(公告)号：DE69109680D1

公开(公告)日：1995-06-14

申请号：DE69109680

申请日：1991-07-22

Applicant: DISPLAYTECH INC

Inventor： WAND MICHAEL ,  THURMES WILLIAM ,  WALBA DAVID

IPC: C07C43/225 ,  C07C69/76 ,  C07C69/773 ,  C07C69/92 ,  C07D213/30 ,  C07D237/08 ,  C07D239/26 ,  C07D285/12 ,  C09K19/04 ,  C09K19/12 ,  C09K19/20 ,  C09K19/34 ,  C09K19/58 ,  G02F1/13

Abstract: The subject application discloses a chiral nonracemic composition of the general formula: R1-Ar-O-CH2-C*HX-C*HY-CH2-O-R2 wherein R1 is an achiral tail of two to sixteen carbons; Ar is an achiral FLC core of at least two rings; * denotes a chiral carbon; X and Y are halogens; and R2 is one to ten carbon atoms. The -O-CH2-C*HX-C*HY-CH2-O- segment comprises the chiral proximal segment of the chiral tail; the proximal segment is selected from the enantiomers 2R,3R-dihalo and 2S,3S-dihalo. R2 is the distal segment of the chiral tail.

公开(公告)号：CA2088934A1

公开(公告)日：1993-08-08

申请号：CA2088934

申请日：1993-02-08

Applicant: DISPLAYTECH INC ,  HOECHST AG

Inventor： WAND MICHAEL ,  HANDSCHY MARK ,  ESCHER CLAUS ,  VOHRA ROHINI

IPC: C07C69/92 ,  C07D213/30 ,  C07D213/64 ,  C07D213/65 ,  C07D239/26 ,  C07D239/34 ,  C07D239/38 ,  C07D303/24 ,  C07D405/12 ,  C09K19/02 ,  C09K19/04 ,  C09K19/12 ,  C09K19/20 ,  C09K19/34 ,  C09K19/54 ,  C09K19/58 ,  G02F1/13 ,  G02F1/1337 ,  G02F1/141 ,  G02F1/135

Abstract: High-contrast electro-optic device contain non-surface stabilized FLC cells which retain a helical diameter (?) structure and exhibit a change in optical anisotropy as a function of the magnitude of an applied electric field or driving voltage. The FLC cells incorporate chiral ferroelectric liquid crystals which exhibit a ferroelectric phase and a chiral nematic (N*) phase at temperatures above the ferroelectric phase and comprise uniformly spaced electrode-containing plates between which the FLC is aligned. The cell is provided with means for detecting the change in optical anisotropy in the FLC induced by the application of the electric field.