GB2575579A - Light modulation element - Google Patents
Light modulation element Download PDFInfo
- Publication number
- GB2575579A GB2575579A GB1915019.2A GB201915019A GB2575579A GB 2575579 A GB2575579 A GB 2575579A GB 201915019 A GB201915019 A GB 201915019A GB 2575579 A GB2575579 A GB 2575579A
- Authority
- GB
- United Kingdom
- Prior art keywords
- light modulation
- modulation element
- element according
- diyl
- substrates
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims abstract 2
- 239000000758 substrate Substances 0.000 claims 8
- 239000007788 liquid Substances 0.000 claims 6
- -1 piperidine-1 ,4-diyl Chemical group 0.000 claims 6
- 125000000217 alkyl group Chemical group 0.000 claims 2
- 125000004432 carbon atom Chemical group C* 0.000 claims 2
- 229910052760 oxygen Inorganic materials 0.000 claims 2
- 125000004955 1,4-cyclohexylene group Chemical group [H]C1([H])C([H])([H])C([H])([*:1])C([H])([H])C([H])([H])C1([H])[*:2] 0.000 claims 1
- 125000001140 1,4-phenylene group Chemical group [H]C1=C([H])C([*:2])=C([H])C([H])=C1[*:1] 0.000 claims 1
- 239000004990 Smectic liquid crystal Substances 0.000 claims 1
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 125000003545 alkoxy group Chemical group 0.000 claims 1
- 125000004453 alkoxycarbonyl group Chemical group 0.000 claims 1
- 125000004448 alkyl carbonyl group Chemical group 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 238000004140 cleaning Methods 0.000 claims 1
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 claims 1
- 238000005520 cutting process Methods 0.000 claims 1
- 230000005684 electric field Effects 0.000 claims 1
- 229910052736 halogen Inorganic materials 0.000 claims 1
- 125000005843 halogen group Chemical group 0.000 claims 1
- 229910052739 hydrogen Inorganic materials 0.000 claims 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims 1
- 239000004973 liquid crystal related substance Substances 0.000 claims 1
- 229910052757 nitrogen Inorganic materials 0.000 claims 1
- 125000004430 oxygen atom Chemical group O* 0.000 claims 1
- 230000010287 polarization Effects 0.000 claims 1
- 238000000926 separation method Methods 0.000 claims 1
- 230000002269 spontaneous effect Effects 0.000 claims 1
- 229910052717 sulfur Inorganic materials 0.000 claims 1
- 239000005262 ferroelectric liquid crystals (FLCs) Substances 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/02—Liquid crystal materials characterised by optical, electrical or physical properties of the components, in general
- C09K19/0225—Ferroelectric
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/34—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring
- C09K19/3441—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having nitrogen as hetero atom
- C09K19/3444—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having nitrogen as hetero atom the heterocyclic ring being a six-membered aromatic ring containing one nitrogen atom, e.g. pyridine
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/34—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring
- C09K19/3441—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having nitrogen as hetero atom
- C09K19/345—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having nitrogen as hetero atom the heterocyclic ring being a six-membered aromatic ring containing two nitrogen atoms
- C09K19/3458—Uncondensed pyrimidines
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/34—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring
- C09K19/3491—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having sulfur as hetero atom
- C09K19/3497—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having sulfur as hetero atom the heterocyclic ring containing sulfur and nitrogen atoms
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Liquid Crystal (AREA)
Abstract
The invention provides a defect-free light modulation element utilizing the vertically aligned deformed helix ferroelectric liquid crystal (VADHFLC) mode. Further, the present invention relates to a method of production of such light modulation element, to the use of such light modulation element in an electro-optical device, i.e. in a LC display device, and to an electro- optical device comprising the light modulation element according to the present invention.
Claims (7)
1. Light modulation element comprising a pair of transparent substrates, a pair of polarizers, a liquid crystal medium capable of forming a chiral smectic C phase in homeotropic orientation that is located in between the pair of substrates, and an electrode structure which generates an electric field in directions parallel to the substrates main plane, characterized in that the electrode structure is formed by at least two electrodes protruding toward the interior of the formed cell.
The light modulation element according to claim 1 , wherein substrates are arranged with a separation from 1 Î1⁄4Î¹Ï Î¹ up to 20 Î1⁄4Î¹Ï Î¹ from another.
The light modulation element according to claim 1 or 2, wherein the gap between to electrodes is in a range of 500 nm to 150 Î1⁄4Î¹Ï Î¹.
The light modulation element according to one or more of claims 1 to 3, wherein at least one homeotropic alignment layer is provided on the inner side of at least one substrate.
The light modulation element according to one or more of claims 1 to 4, wherein the liquid crystalline media exhibit a spontaneous polarization (Ps) of 100 nC/cm2 or more.
The light modulation element according to one or more of claims 1 to 5, wherein the liquid-crystalline medium liquid crystalline medium is selected from liquid crystalline media wherein where nave is the effective average refractive index of the liquid crystalline media and P is the chiral pitch of the liquid crystalline media.
7. The light modulation element according to one or more of claims 1 to 6, wherein the liquid crystalline media for the light modulation element according to the present invention comprise one or more compounds selected from formulae I, II or III, R1 -(A 1-Z1 1 )a-A'-(Z12-A12)b-(-Z13-A13)c-R12 I R2 -(A21-Z2 )d-A"-(Z22-A22)e-R22 R31 _ A31 _Z31 )f_Alll_(Z32_A32)g_R32 wherein A1 denotes N-N 7 V A11 denotes X A11 denotes X denotes S or O, 31 denotes F or H, R11 to R32 are each independently a straight-chain or branched alkyl group with 1 to 25 C atoms which may be unsubstituted, mono- or polysubstituted by halogen or CN, it being also possible for one or more non-adjacent Ch groups to be replaced, in each occurrence independently from one another, by -O-, -S-, -NH-, -N(CH3)-, -CO-, -COO-, -OCO-, -O-CO-O-, -S-CO-, -CO-S-, -CH=CH-, -CH=CF-, -CF=CF- or -Câ ¡C- in such a manner that oxygen atoms are not linked directly to one another, Z11 to Z32 are each independently selected from -COO-, -OCO-, -O-CO-O-, -OCH2-, -CH2O-, -CH2CH2-, -(CH2)4-, -CF2CF2-, -CH=CH-,-CF=CF-, -CH=CH-COO-, -OCO-CH=CH-, -Câ ¡C- or a single bond, A11 to A32 are each independently in each occurrence 1 ,4- phenylene, wherein in addition one or more CH groups may be replaced by N, 1 ,4-cyclo-hexylene in which, in addition, one or two non-adjacent CH2 groups may be replaced by O and/or S, 1 ,4-cyclohexenylene, 1 ,4-bicyclo- (2,2,2)-octylene, piperidine-1 ,4-diyl, naphthalene-2,6-diyl, decahydro-naphthalene-2,6-diyl, 1 ,2,3,4-tetrahydro- naphthalene-2,6-diyl, cyclobutane-1 ,3-diyl, spiro[3.3]heptane-2,6-diyl or dispiro[3.1 .3.1 ] decane-2,8- diyl, it being possible for all these groups to be unsubstituted, mono-, di-, tri- or tetrasubstituted with F, CI, CN or alkyl, alkoxy, alkylcarbonyl or alkoxycarbonyl groups with 1 to 7 C atoms, wherein one or more H atoms may be substituted by F or CI, a, b and c are each and independently 0 or 1 , whereby a + b + c > 1 , d and e are each and independently 0 or 1 , whereby d + e > 1 , and f and g are each and independently 0 or 1 , whereby f + g > 1 . Process for the production of a light modulation element according to one or more of claims 1 to 7 comprising the following steps: cutting and cleaning the substrates, coating the substrates with an alignment layer agent, providing at least two trough cell electrodes on the substrates or the alignment layer assembling the cell using a UV curable adhesive, and filling the cell with the liquid-crystalline medium. Use of a light modulation element according to one or more of claims 1 to 7 in an electro-optical device. Electro-optical device comprising the light modulation element according to one or more of claims 1 to 7.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP17162046 | 2017-03-21 | ||
| PCT/EP2018/056785 WO2018172232A1 (en) | 2017-03-21 | 2018-03-19 | Light modulation element |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB201915019D0 GB201915019D0 (en) | 2019-12-04 |
| GB2575579A true GB2575579A (en) | 2020-01-15 |
| GB2575579B GB2575579B (en) | 2022-08-10 |
Family
ID=58398090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1915019.2A Expired - Fee Related GB2575579B (en) | 2017-03-21 | 2018-03-19 | Light modulation element |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB2575579B (en) |
| WO (1) | WO2018172232A1 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080204608A1 (en) * | 2006-03-01 | 2008-08-28 | Yohei Takano | Liquid Crystal Element, Optical Path Deflecting Element, and Image Displaying Apparatus |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6025897A (en) | 1993-12-21 | 2000-02-15 | 3M Innovative Properties Co. | Display with reflective polarizer and randomizing cavity |
| US6099758A (en) | 1997-09-17 | 2000-08-08 | Merck Patent Gesellschaft Mit Beschrankter Haftung | Broadband reflective polarizer |
| DE10241301A1 (en) | 2002-09-04 | 2004-03-18 | Merck Patent Gmbh | Electrooptic light control element and display and medium for television and computer screens has temperature driven control mechanism |
| US9771517B2 (en) | 2012-06-06 | 2017-09-26 | Dic Corporation | Liquid-crystal optical modulation element |
-
2018
- 2018-03-19 WO PCT/EP2018/056785 patent/WO2018172232A1/en active Application Filing
- 2018-03-19 GB GB1915019.2A patent/GB2575579B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080204608A1 (en) * | 2006-03-01 | 2008-08-28 | Yohei Takano | Liquid Crystal Element, Optical Path Deflecting Element, and Image Displaying Apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2575579B (en) | 2022-08-10 |
| GB201915019D0 (en) | 2019-12-04 |
| WO2018172232A1 (en) | 2018-09-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20230319 |