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11. 发明专利

AU1248088A ULTRAVIOLET RADIATION DETECTOR 未知
公开(公告)号：AU1248088A
公开(公告)日：1988-09-14
申请号：AU1248088
申请日：1988-02-09
申请人： SECR DEFENCE BRIT
发明人： MCDONNELL DAMIEN GERARD , BONNETT PAUL , RAWLE ALAN FREDERICK
IPC分类号： G01J1/58

12. 发明专利

GB2347006B Liquid crystal device 未知
公开(公告)号：GB2347006B
公开(公告)日：2000-10-04
申请号：GB0012180
申请日：1996-07-26
申请人： SHARP KK , SECR DEFENCE BRIT
发明人： BRADSHAW MADELINE JOAN , JONES JOHN CLIFFORD , SAGE IAN CHARLES , MCDONNELL DAMIEN GERARD , GASS PAUL ANTONY
IPC分类号： G02F1/1333 , G02F1/1339 , G02F1/1341 , G02F1/141
摘要： A liquid crystal device is provided with a pair of substrates (12, 16) containing a liquid crystal material (22). A wall structure comprising, for example, a plurality of walls (14) is provided between the two substrates. The wall structure provides mechanical strength to the device and resistance to flow of liquid crystal material which can cause deterioration in the device performance. The walls may extend in two mutually different directions (Fig. 8, 40) to provide mechanical strength and resistance to flow in two directions while the device can still be readily filled. The device is particularly applicable to a ferroelectric liquid crystal device.

13. 发明专利

GB2294046B Discotic compounds for use in liquid crystal mixtures 未知
公开(公告)号：GB2294046B
公开(公告)日：1998-01-07
申请号：GB9525136
申请日：1993-06-16
申请人： SECR DEFENCE BRIT
发明人： GOODBY JOHN WILLIAM , HIRD MICHAEL , BEATTIE DAVID RICHARD , HINDMARSH PAUL , GRAY GEORGE WILLIAM , MCDONNELL DAMIEN GERARD , JONES JOHN CLIFFORD , PHILLIPS TIMOTHY JONATHAN
IPC分类号： G02F1/13 , C07C43/20 , C07C43/205 , C07C43/215 , C07C43/225 , C07C69/00 , C07C69/76 , C07C69/773 , C07C69/92 , C07C255/54 , C07C255/55 , C07C255/57 , C09K19/32
摘要： PCT No. PCT/GB93/01291 Sec. 371 Date Feb. 28, 1996 Sec. 102(e) Date Feb. 28, 1996 PCT Filed Jun. 16, 1993 PCT Pub. No. WO94/29263 PCT Pub. Date Dec. 22, 1994 (I) (II) Liquid crystal compounds have been synthesized of general formula (I) and may be mixed with other liquid crystal compounds to give useful liquid crystal mixtures which may then be used in liquid crystal devices. Such devices include linear and non-linear electrical, optical and electro-optical devices, magneto-optical devices and devices providing responses to stimuli such as temperature changes and total or partial pressure changes. Formula (I) where each Z1-6 is given by formula (II), where Y for each of Z1-6 is independently COO, OCO, CH2O and OCH2, m defines the number of substituents on each of Z1-6 and is independently 0-5,and X is independently for each substituent on each of Z1-6 alkyl (straight chain, branched and chiral), alkoxy (straight chain, branched or chiral), alkanoyl (straight chain, branched or chiral), alkenyl (straight chain, branched or chiral), halogen, halogenoalkyl (straight chain, branched or chiral) and CN, provided that at least one of Z-61 has at least one substituent X, and excluding where m is 1 for each of Z1-6, Y is COO for each of Z1-6 and X is n-alkyl or n-alkoxy positioned para to Y for each of Z1-6 and also where M is 5 for each of Z1-6, Y is COO for each of Z1-6 and for each Z1-6 X is selected as n-alkoxy positioned para to Y and fluoride for all other substituents.

14. 发明专利

CA2212722A1 LIQUID CRYSTAL DEVICE ALIGNMENT 未知
公开(公告)号：CA2212722A1
公开(公告)日：1996-08-15
申请号：CA2212722
申请日：1996-01-22
申请人： SECR DEFENCE BRIT
发明人： MCDONNELL DAMIEN GERARD , BROWN CARL VERNON , BRYAN-BROWN GUY PETER
IPC分类号： G02F1/1337
摘要： A liquid crystal display cell comprises two cell walls spaced apart to enclose a layer of liquid crystal material. The cell walls carry electrode structures, e.g. arranged in rows and columns to give an x,y matrix of addressable elements or pixels. The liquid crystal material is aligned by a grating (grooved) structure on one or both cell walls. This grating structure is a bigrating with one symmetrical grating and an asymmetric grating which may be orthogonal to the symmetric grating. The grooves of the asymmetric grating varying their depth or asymmetry along the lengths to give a locally varying pretilt whose longer range average provides a pretilt in a preferred range, e.g. about 2-24~.

15. 发明专利

CA2198716A1 FERROELECTRIC LIQUID CRYSTAL DEVICES 未知
公开(公告)号：CA2198716A1
公开(公告)日：1996-03-07
申请号：CA2198716
申请日：1995-08-30
申请人： SECR DEFENCE BRIT
发明人： MASON IAN ROBERT , MCDONNELL DAMIEN GERARD , JONES JOHN CLIFFORD , BRYAN-BROWN GUY PETER
IPC分类号： G02F1/1333 , C09K19/02 , C09K19/38 , C09K19/54 , G02F1/1334 , G02F1/137 , G02F1/141 , G02F1/133
摘要： In order to reduce the effects of impact on liquid crystal devices a polymer network is introduced into ferroelectric liquid crystal cells. A liquid crystal device comprises two spaced cell walls each bearing electrode structures and treated on at least one facing surface with an alignment layer, a layer of a smectic liquid crystal material enclosed between the cell walls, characterised in that the liquid crystal material contains a small amount of monomer. The liquid crystal material may also contain a photoinitiator. The monomer material may be cured to produce the polymer network; the curing may be carried out in the presence of an electric or magnetic field. Further, the monomer may be cured in an isotropic or liquid crystal phase.

16. 发明专利

CA2182962A1 BISTABLE NEMATIC LIQUID CRYSTAL DEVICES 未知
公开(公告)号：CA2182962A1
公开(公告)日：1995-08-17
申请号：CA2182962
申请日：1995-01-30
申请人： SECR DEFENCE BRIT
发明人： BRYAN-BROWN GUY PETER , MCDONNELL DAMIEN GERARD , TOWLER MICHAEL JOHN , BANCROFT MARTIN STUART
IPC分类号： G02F1/1337 , G02F1/1339 , G02F1/139
摘要： The invention provides a nematic liquid crystal device with two bistable switched states. The device comprises two cell walls carrying electrodes structures and enclosed a layer of a nematic liquid crystal material. The cell walls are treated to provide a bigrating on one or both walls. The bigrating is a shaped surface that permits liquid crystal molecules at a surface to lie in two different angular directions, e.g. 45.degree. or 90.degree. apart, in contrast with conventional surface alignments which align liquid crystal molecules in a single direction at a surface. For a cell with bigratings on both walls the two alignment direction on both walls are in register. Polarisers are arranged in front and behind the cell with their optical axes orthogonal and with the optical axis of one polariser parallel to one of the switched alignments. In this example, as the material is switched between the two alignment states the polariser transmits or blocks light. The bigratings may be symmetric or asymmetric, in which later case an amount of surface tilt is obtained. Appropriate surface tilt on both cell walls may give a splayed molecular configuration in both switched states. For splayed configurations, the device may be electrically switched using flexoelectric coupling. For other configurations the device may be switched by use of dc pulses in combination with chiral ions in the liquid crystal material. The bigratings may be produced by interferography, photolithography, embossing, ruling, or transferred from a carrier layer. A bigrating on one cell wall may be combined with a conventional monograting or e.g. rubbing alignment treatment on the other cell wall. In this case the material is twisted in both its switched states.

17. 发明专利

DE3685522D1 未知
公开(公告)号：DE3685522D1
公开(公告)日：1992-07-09
申请号：DE3685522
申请日：1986-06-13
申请人： SECR DEFENCE BRIT
发明人： MCDONNELL DAMIEN GERARD , CONSTANT JENNIFER
IPC分类号： C09D11/00 , C09K19/02 , C09K19/30 , C09K19/42 , C09K19/44 , C09K19/46 , G01K11/12 , G02F1/13
摘要： A novel method of preparing thermochromic liquid crystal mixtures is provided in which mixtures which show an injected smectic phase at lower temperatures than theirthermochromic cholesteric phase are prepared, and by following the envelope of the injected smectic - cholesteric transition on the phase diagram a series of thermochromic compositions containing the same components but having a series of working temperature ranges are obtained.Novel thermochromic liquid crystal mixtures prepared using the method are also provided.

18. 发明专利

HK14686A LIQUID CRYSTAL COMPOSITIONS 未知
公开(公告)号：HK14686A
公开(公告)日：1986-03-07
申请号：HK14686
申请日：1986-02-27
申请人： SECR DEFENCE BRIT
发明人： IRVING DEBORAH ANNE LISLE , MCDONNELL DAMIEN GERARD , RAYNES EDWARD PETER
IPC分类号： C09K19/46 , G02F1/13 , G09F9/00 , G09F9/35 , C09K19/30
摘要： A nematic liquid crystal composition suitable for use as the liquid crystal material of a multiplexed twisted nematic electro-optical display comprising a mixture of Components A, B and C as follows: Component A: a high dielectric anisotropy component; Component B: a low dielectric anisotropy component; Component C: a high cleaning component having a clearing point greater than 80 DEG C.; wherein Component A forms from 25% to 50% inclusive by weight of the composition and consists of one or more two ringed compounds having a terminal cyano group and includes at least one compound having formula I as follows Formula I where R1 is an n-alkyl group having up to 7 carbon atoms and represents a trans-1,4 disubstituted cyclohexane ring; wherein Component B forms from 25% to 50% inclusive by weight of the composition and consists of one or more low dielectric anisotropy compounds, at least 50% of Component B being formed by one or more ester compounds having Formula II as follows: Formula II where R2 and R3 are independently n-alkyl groups having up to seven carbon atoms; and wherein Component C forms from 15% to 35% inclusive by weight of the composition and consists of compounds having a clearing point greater than 80 DEG C. and at least 50% by weight of component C is formed by one or more compounds selected from the families whose general formulae are represented by Formulae IV to VII as follows: Formula IV Formula V Formula VI Formula VII Formula VIII where each R is independently n-alkyl having up to seven carbon atoms and represents a trans-1,4-disubstituted cyclohexane ring; the percentages by weight of Components A, B and C adding to 100%.

19. 发明专利

CH639128A5 FLUESSIGKRISTALLMATERIAL. 未知
公开(公告)号：CH639128A5
公开(公告)日：1983-10-31
申请号：CH992877
申请日：1977-08-12
申请人： SECR DEFENCE BRIT
发明人： COATES DAVID , GRAY GEORGE WILLIAM , MCDONNELL DAMIEN GERARD
IPC分类号： C07C43/20 , C07C45/46 , C07C51/29 , C07C51/36 , C07C69/75 , C07C69/90 , C07C69/94 , C07C255/50 , C07C255/51 , C07C255/53 , C09K19/00 , C09K19/30 , C09K19/32 , G02F1/13 , H01B3/42 , C09K3/34

20. 发明专利

CH624705A5 未知
公开(公告)号：CH624705A5
公开(公告)日：1981-08-14
申请号：CH777076
申请日：1976-06-17
申请人： SECR DEFENCE BRIT
发明人： COATES DAVID , GRAY GEORGE WILLIAM , MCDONNELL DAMIEN GERARD
IPC分类号： C09B29/00 , C09B31/00 , C09B31/30 , C09B33/00 , C09B35/00 , C09B43/08 , C09B43/10 , C09B67/44 , C09K19/60 , G02F1/13 , G02F1/137 , C09K3/34 , C09B67/02

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