WO2006121040A1 - 液晶および液晶ディスプレイ - Google Patents
液晶および液晶ディスプレイ Download PDFInfo
- Publication number
- WO2006121040A1 WO2006121040A1 PCT/JP2006/309317 JP2006309317W WO2006121040A1 WO 2006121040 A1 WO2006121040 A1 WO 2006121040A1 JP 2006309317 W JP2006309317 W JP 2006309317W WO 2006121040 A1 WO2006121040 A1 WO 2006121040A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- liquid crystal
- crystal compound
- compound
- group
- chain
- Prior art date
Links
Classifications
-
- 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
- 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
-
- 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
-
- 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
- C09K19/02—Liquid crystal materials characterised by optical, electrical or physical properties of the components, in general
- C09K19/0266—Antiferroelectrics
-
- 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
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/22—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and nitrogen atoms as chain links, e.g. Schiff bases
-
- 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
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
-
- 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
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
- C09K2323/03—Viewing layer characterised by chemical composition
-
- 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
- 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
-
- 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
- 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
- G02F1/1412—Antiferroelectric liquid crystals
-
- 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
- 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
- G02F1/1418—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 using smectic liquid crystals, e.g. based on the electroclinic effect
Definitions
- the present invention relates to a novel liquid crystal.
- the present invention also relates to a novel liquid crystal display using this liquid crystal.
- ferroelectric liquid crystals Compared to nematic liquid crystals used in conventional liquid crystal displays, ferroelectric liquid crystals have a response speed of several tens to several hundred times faster when an electric field is applied, and are attracting attention as a new display-type material. The research is still underway.
- Ferroelectric liquid crystals were discovered in 1976 by American Meyer. In this system, asymmetric carbon was introduced into a compound that expresses smectic C, and the chirality of the system was reduced by using a chiral smectic C phase to develop ferroelectricity.
- Patent Document 1 Japanese Patent Laid-Open No. 9-221456
- Patent Document 2 Japanese Patent Laid-Open No. 11-256163
- Patent Document 3 Japanese Patent Laid-Open No. 2002-161277
- Non-Patent Document 1 J. Watanabe, T. Izumi, T. Niori, M. Zennyoji, Y. Takanishi, H. Takez oe., Mol. Cryst. Liq. Cryst., 346, 77 (2000)
- the ferroelectric smectic liquid crystal phase formed by the conventional banana-type liquid crystal has a tilted structure with respect to the normal direction of the smectic liquid crystal layer.
- the problem was that three liquid crystal phases (+) chiral, (1) chiral, and racemic would coexist.
- the present invention has been made in view of such problems, and an object thereof is to provide a novel liquid crystal.
- Another object of the present invention is to provide a novel liquid crystal display using this liquid crystal.
- the liquid crystal of the present invention is characterized by including a first liquid crystal compound having a bent structure and another second liquid crystal compound. .
- the liquid crystal phase formed by the first liquid crystal compound may be a ferroelectric or antiferroelectric material.
- the liquid crystal compound formed by the second liquid crystal compound can be used without exhibiting ferroelectricity and antiferroelectricity.
- the second liquid crystal compound having a bent structure can be used.
- the first liquid crystal compound and the second liquid crystal compound can have the same structure except for the terminal chain length.
- a smectic liquid crystal phase formed by the first liquid crystal compound has a tilt structure
- a smectic liquid crystal phase formed by the second liquid crystal compound can be used without a tilt structure.
- the first liquid crystal compound and the second liquid crystal compound are represented by the general formula A—M—X—BX—M.
- A (where A is the terminal chain, M and M are mesogenic groups, X and X are linking groups, and B is bent.
- the bending chain B is one (CH) — (n is an integer), one ((CH) -0-) — (
- the carbon number of chain A is in the range of 12-20, and the carbon number of terminal chain A of the second liquid crystal compound is in the range of 1-7.
- a compound in which 1 2 is at least one group selected from the group consisting of Chemical 2 can be used. It is possible to use those in which the linking group X is --COO and the linking group X is --OCO.
- first liquid crystal compound and the second liquid crystal compound have the general formula A — M -X-B-Y-M
- a and A are terminal chains, M and M are mesogen groups, and X and Y are linking groups.
- Terminal chain A A is one 0 (CH) CH (n is an integer
- the number of carbon atoms of the terminal chains A and A of the first liquid crystal compound is in the range of 12 to 20,
- the terminal chain A of the liquid crystal compound (2) has a carbon number in the range of 1 to 7
- a compound in which the aromatic compound group B is at least one group selected from the group consisting of Chemical formula 4 can be used.
- the liquid crystal display of the present invention is characterized by using a first liquid crystal compound having a bent structure and a liquid crystal having another second liquid crystal compound force.
- a liquid crystal having a ferroelectric or antiferroelectric property formed by the first liquid crystal compound can be used.
- the liquid crystal compound formed by the second liquid crystal compound can be used without exhibiting ferroelectricity and antiferroelectricity.
- the second liquid crystal compound is bent The thing which has can be used.
- the first liquid crystal compound and the second liquid crystal compound can have the same structure except for the terminal chain length.
- a smectic liquid crystal phase formed by the first liquid crystal compound has a tilt structure
- a smectic liquid crystal phase formed by the second liquid crystal compound can be used without a tilt structure.
- first liquid crystal compound and the second liquid crystal compound force General formula A— M -X -B-X M
- the bending chain B is one (CH) — (n is an integer), one ((CH) -0-) — (
- the carbon number of chain A is in the range of 12-20, and the carbon number of terminal chain A of the second liquid crystal compound is in the range of 1-7.
- a compound in which 1 2 is at least one group selected from the group consisting of Chemical 2 can be used. It is possible to use those in which the linking group X is --COO and the linking group X is --OCO.
- first liquid crystal compound and the second liquid crystal compound have the general formula A — M -X-B-Y-M
- a and A are terminal chains, M and M are mesogen groups, and X and Y are linking groups.
- Terminal chain A A is one 0 (CH) CH (n is an integer
- the number of carbon atoms of the terminal chains A and A of the first liquid crystal compound is in the range of 12 to 20,
- the terminal chain A of the liquid crystal compound (2) has a carbon number in the range of 1 to 7 Can. At least one selected from the group consisting of mesogenic groups M and M
- a compound in which the aromatic compound group B is at least one group selected from the group consisting of Chemical formula 4 can be used.
- the present invention has the following effects.
- the present invention includes the first liquid crystal compound having a bent structure and the other second liquid crystal compound, a novel liquid crystal can be provided.
- the present invention uses a liquid crystal composed of a first liquid crystal compound having a bent structure and another second liquid crystal compound, a novel liquid crystal display can be provided.
- FIG. 1 is a diagram showing an example of a liquid crystal display of the present invention.
- FIG. 2 is a graph showing the relationship between the number of carbon atoms in the terminal chain and the phase structure of a compound having a bent structure.
- FIG. 3 is a diagram showing S S , S f , and S b phase structures.
- FIG. 4 is a graph showing changes in the layer spacing with respect to the content of 160AM5AM016.
- FIG. 5 is a diagram showing an apparatus used for structure observation, polarization reversal current measurement, and extinction potential reversal measurement for liquid crystal.
- FIG. 6 is a diagram showing an equivalent circuit of the apparatus shown in FIG.
- FIG. 7 is a diagram showing a waveform when a triangular wave voltage is applied to the liquid crystal.
- FIG. 8 is a diagram showing a waveform when a rectangular wave voltage is applied to the liquid crystal.
- the liquid crystal of the present invention comprises a first liquid crystal compound having a bent structure and another second liquid crystal Includes compound.
- the first liquid crystal compound has a bent structure.
- Liquid crystals having a bent structure are called banana-type liquid crystals or bent-type liquid crystals, and have a bent molecular force.
- the liquid crystal phase formed by the first liquid crystal compound exhibits ferroelectricity or antiferroelectricity.
- a ferroelectric liquid crystal is a liquid crystal in which molecules have spontaneous polarization and the direction of spontaneous polarization is aligned in one direction as a whole of the liquid crystal phase, and the direction of spontaneous polarization is directed to the direction of electric field application when an electric field is applied.
- Antiferroelectric liquid crystal is a molecule in which the molecules are spontaneously polarized and the direction of the spontaneous polarization in the same layer is aligned, but the spontaneous polarization direction of the adjacent layer is in the opposite direction, and the entire liquid crystal phase is spontaneously polarized.
- the smectic liquid crystal phase formed by the first liquid crystal compound has a tilt structure.
- a smectic liquid crystal phase is a liquid crystal phase that is a kind of liquid crystal and has a layer structure.
- the tilt structure refers to a structure in which the molecules are tilted or tilted with respect to the layer normal in the smectic liquid crystal phase.
- the second liquid crystal compound has a bent structure.
- the liquid crystal phase formed by the second liquid crystal compound does not exhibit ferroelectricity or antiferroelectricity.
- the first liquid crystal compound and the second liquid crystal compound have the same structure except for the terminal chain length.
- the smectic liquid crystal phase formed by the second liquid crystal compound has a tilt structure.
- Examples of the first liquid crystal compound and the second liquid crystal compound include those having the structure i.
- Examples of the first liquid crystal compound and the second liquid crystal compound include liquid crystals having the following general formula. Togashi.
- A is the terminal chain
- M and M are mesogenic groups
- X and X are linking groups
- B is bent
- the mesogenic groups M and M and the linking groups X and X are centered on the bent chain B, respectively.
- Bending chain B is — (CH) — (n is an integer), — ((CH) — O—) — (CH) — (m,
- the number of carbon atoms of the bent chain B is preferably in the range of 3 to 9. Further, the number of carbon atoms of the bent chain B is more preferably in the range of 5-7.
- the terminal chain A is either -0- (CH) CH (n is an integer) or (CH) CH (n is an integer)
- Power is one group.
- the terminal chain A of the first liquid crystal compound preferably has 12 to 20 carbon atoms. Further, the carbon number of the terminal chain A of the first liquid crystal compound is more preferably in the range of 12-18.
- the carbon number of the terminal chain A of the second liquid crystal compound is preferably in the range of 1-7.
- the carbon number of the terminal chain A of the second liquid crystal compound is in the range of 4-6.
- the mesogenic groups M 1 and M 2 are at least one group selected from the group consisting of Chemical Formula 2.
- the skeleton of these mesogen groups may be partially substituted with a substituent such as cyan group, halogen group, methoxy group, or methyl group.
- the linking group X is —COO, and the linking group X is —OCO group.
- Examples of the first liquid crystal compound and the second liquid crystal compound include liquid crystals represented by the following general formula.
- a and A are terminal chains
- M and M are mesogen groups
- X and Y are linking groups.
- Each independently COO-or OCO-, and B is an aromatic compound group.
- the terminal chain A 1, ⁇ is 1 0 (CH 2) CH (n is an integer), 1 (CH 2) CH (n is an integer),
- the terminal chain A of the first liquid crystal compound has a carbon number in the range of 12 to 20
- the terminal chain A of the first liquid crystal compound has a carbon number of 12 to 18
- the terminal chain A of the second liquid crystal compound has a carbon number in the range of 1-7.
- the carbon number of the terminal chains A and A of the second liquid crystal compound is in the range of 4-6.
- the mesogenic groups M 1 and M 2 are at least one group selected from the group consisting of
- the skeleton of these mesogen groups may be partially substituted with a substituent such as a cyano group, a halogen group, a methoxy group, or a methyl group.
- the aromatic compound group B is at least one group selected from the group consisting of: In addition,
- the skeleton of these aromatic compound groups may be partially substituted with substituents such as cyan groups, halogen groups, methoxy groups, and methyl groups.
- the content of the first liquid crystal compound is preferably in the range of 20 to 85 mol%. Further, the content of the first liquid crystal compound is more preferably in the range of 25 to 80 mol%.
- a liquid crystal having ferroelectricity or antiferroelectricity but having a bent structure in which molecules form a liquid crystal phase inclined with respect to the normal direction of the smectic liquid crystal layer is ferroelectric.
- the molecule is formed by the smectic layer method according to the blend ratio.
- Ferroelectric liquid crystals and antiferroelectric liquid crystals can be created that have a slanted structure that is inclined with respect to the line direction. Without tilt structure ⁇ The tilt is suppressed by blending the compound that forms liquid crystal, and only one type of liquid crystal is formed from three types of mixtures. Can do.
- the liquid crystal according to the present invention can be used as a liquid crystal display.
- liquid crystal displays that can be used include ferroelectric liquid crystal displays for in-plane switching (IPS) mode and anti-ferroelectric liquid crystal displays.
- the display for the in-plane switching (IPS) mode is a conventional type of LCD (TN mode) where liquid crystal molecules are sandwiched between two electrodes, whereas IPS has two electrodes on one side of the substrate. It has a structure with When no voltage is applied, unlike the TN mode, the liquid crystal molecules are not twisted. However, when a voltage is applied to the electrode in parallel with the glass substrate, the liquid crystal molecules are aligned horizontally with the glass substrate. As a result, liquid crystal molecules are aligned horizontally on the glass substrate, eliminating the narrow viewing angle problem inherent to LCDs.
- the response speed becomes slow, in the present invention, since the ferroelectric liquid crystal or the antiferroelectric liquid crystal is used as the liquid crystal material, the response speed can be improved.
- FIG. 1 is a diagram showing an example of the liquid crystal display of the present invention.
- a first liquid crystal compound having a bent structure and a liquid crystal having a second liquid crystal compound force are used.
- the direction of the molecule coincides with the direction of the polarizer when no electric field is applied. Arrange so that. This realizes a normal dark field (normally black). Since the direction of the molecule is 45 ° tilted with respect to the polarizer, the electric field application direction is 45 ° tilted with respect to the polarizer. Since the molecules are aligned in the direction of electric field application, when the electric field is applied to the polarizer at an angle of 45 °, the display becomes brighter and higher contrast can be obtained.
- a liquid crystal composed of a first liquid crystal compound having a bent structure and another second liquid crystal compound is used.
- a liquid crystal display can be provided.
- FIG. 2 is a diagram showing the relationship between the number of terminal chain carbon atoms and the phase structure of a compound having a bent structure (Non-Patent Document 1).
- Figure 3 shows the S S , S f , and S b phase structures of a compound with a bent structure.
- the compound represented by Chemical formula 9 has a structure in which two mesogen groups forming a liquid crystal are contained in one molecule and they are connected by a bent chain.
- the force that all mesogens are normally oriented in the same direction.
- the liquid crystal structure formed has the effect of the linked alkyl chain. Receive strongly.
- the linked alkyl chain usually has an all-trans structure. In this case, if the number of carbon atoms in the linked alkyl chain is an odd number, the two mesogens are inclined in opposite directions and linked alkyl. If the carbon number is even, the two mesogens are arranged in parallel.
- the compound represented by Chemical formula 9 has two mesogen groups that form liquid crystals in one molecule.
- this molecule forms a smectic liquid crystal phase, it basically tries to form a smectic layer in which mesogens are arranged at regular intervals.
- the mesogens are bent to form evenly spaced layers.
- An S phase is formed in which the chain and end chain are randomly compatible.
- This structure is called a single layer smectic layer because each mesogen forms a layer, and it is expressed as S s by taking s of single-layer.
- Smectic layer spacing in S s is molecular
- the bent chain length is very different from the terminal chain length, specifically, when the number of carbons of the terminal chain is 12 or more with respect to the number of carbons of the bent chain, the bent chain and the end chain are no longer compatible with each other at random. S phase is formed in which they cause micro-layer separation. This is mesogen
- the pack layer spacing is approximately the same as the molecular length.
- the X-ray diffraction measurement results show a slightly shorter value than the calculated molecular length, suggesting that the molecule has a tilt structure that is inclined with respect to the smectic layer normal.
- s b all mesogens in the same layer face the same direction. Therefore, the dipole moment of each mesogen is not canceled in each layer and has a strong! ⁇ dipole moment (also called spontaneous polarization) in each layer.
- This spontaneous polarization is directed in the same direction in the liquid crystal phase, and the liquid crystal that appears to force molecules in the direction of electric field application by applying an electric field is a ferroelectric liquid crystal, and the spontaneous polarization in each layer is directed in the same direction.
- the molecules are tilted with respect to the normal direction of the smectic layer, and (+) chiral, (1) chiral, and racemic liquid crystal species are mixed depending on the tilt direction.
- S f Smectic liquid crystal, called S f is formed in the region.
- the structure of S f is shown in Fig. 3.
- the center As shown in the center. Basically, it is a two-dimensional structure that forms a bi-layer structure, but also includes a structure in which several units are one unit and a unit is shifted by a half cycle. Spontaneous polarization generated in one unit can be canceled by an adjacent unit due to a half cycle shift. That is, the two-dimensional structure of S f is different from the anti-ferroelectric structure of S b .
- the structure is for the purpose of canceling spontaneous polarization in the whole system, and is a structure of dissipation of spontaneous polarization (frustration). So frustration! 3 ⁇ 4 takes S f . S f is different from S b
- the liquid crystal molecules When applied, the liquid crystal molecules form a two-dimensional lattice and the direction in which the electric field is applied to each block is derived from the dielectric anisotropy of the paraelectric liquid crystal, and the response speed is very slow.
- the liquid crystal compound of [9] is employed as the first liquid crystal compound and the second liquid crystal compound.
- a method for producing a mixed sample will be described.
- the first liquid crystal compound and the second liquid crystal compound are prepared in a specified molar ratio between the screws, and the mixture is dissolved and mixed in a black mouth form. Stir the solution thoroughly. This mixed solution was left in an oven at 50 ° C. to evaporate the black mouth form to obtain a mixed sample.
- the number of moles of the first liquid crystal compound to the total number of moles of the first liquid crystal compound and a second liquid crystal compound 0 mole 0/0, 25.1 mol%, 49.8 mole 0/0, 68. 1 mole 0/0, 80 mole 0/0, 90 mole 0/0, to produce a 100 mole 0/0 LCD
- a polarizing microscope (BX50, Olympus) was used. Set the sample sandwiched between the slide glass and the cover glass in a hot stage (FP-90, manufactured by METTLER), and set it on a rotating stage between the microscope polarizer and the easy-to-transmit axis of the analyzer. To do. By observing the sample structure while changing the temperature in the hot stage, the type of liquid crystal phase and the phase transition temperature were confirmed. The specific phase transition temperature is determined using the peak temperature in DSC (Differential Thermal Scanning Calorimetry) measurement. In addition, the detailed liquid crystal structure was determined by combining the X-ray diffraction measurement results and the polarization microscope observation results when an electric field was applied.
- DSC Different Thermal Scanning Calorimetry
- a specific phase transition temperature was measured by differential thermal scanning calorimetry.
- the differential thermal scanning calorimetry is performed by injecting 3 to 5 mg of sample into a metal pan for a suggested thermal scanning calorimeter and entering anything. The amount of heat required to lower the temperature and raise / lower the sample was measured.
- the temperature at the peak top of the exothermic peak derived from the isotropic phase-liquid crystal phase transition or liquid crystal phase-crystal phase transition of the sample during the temperature lowering process was defined as the transition temperature of the sample.
- the measurement results are shown in the column of phase transition behavior in Table 1. For the phase transition behavior, the peak temperature observed by DSC measurement is described.
- An X-ray apparatus (RINT200, manufactured by RIGAKU) was used. A sample subjected to alignment treatment was used for determining the liquid crystal structure, and a non-aligned sample using silicon as a reference was used for determining the layer spacing.
- a liquid crystal sample is placed on the glass for measuring an oriented sample at its isotropic phase temperature.
- An aligned liquid crystal state can be obtained by setting the glass on a hot stage (FP-90) and lowering the temperature more slowly than the isotropic phase temperature.
- a liquid crystal alignment pattern was obtained by irradiating the aligned liquid crystal sample with X-rays.
- the non-oriented sample was prepared as follows. In a hot stage, a liquid crystal sample and reference silicon are sandwiched between two thin film glasses, and the temperature of the hot stage is set to a temperature at which the sample becomes a liquid crystal phase. A pattern was obtained. The periodic length of the ordered structure in the liquid crystal structure was determined from the correlation between the reference silicon and liquid crystal patterns. Measurements were performed while changing the temperature, and the periodic length of the ordered structure in the liquid crystal phase and the crystal phase was measured. In general, this value is compared with the molecular length obtained by molecular simulation, and if it is almost the same length, it is judged that there is no tilt structure, and if there is a decrease, it is judged that there is a tilt structure. The tilt structure can also be determined from the structure observation during the measurement of polarization reversal current.
- the horizontal axis represents the blend ratio
- the vertical axis represents the layer spacing
- the molecular length of only the blended sample is connected by a straight line
- the tilt structure depends on whether the layer spacing of the liquid crystal phase is on the straight line. Judging the presence or absence of.
- the crystal value is considered to be the molecular length because the layer spacing of the crystal phase is almost linear. Therefore, it was judged that there was no tilt structure when the layer spacing between the liquid crystal phase and the crystal phase was equal, and that there was a tilt structure when the layer spacing between the liquid crystal phase was shorter than the crystal phase (see Fig. 4).
- FIG. 4 is a diagram showing a change in the layer spacing with respect to the content of the first liquid crystal compound. Where calc is the calculated value (0% and 100% samples only). Cr is the crystal phase, S, S S , S, is the liquid crystal phase is there. S s indicates a half value of the molecular length. S s is one mesogen as shown in Fig. 3 (a).
- Chemical formula 9 has two mesogens in one molecule, and the period length of one mesogen corresponds to half of the molecular length. Therefore, the distance between smectic layers formed by S s is half the molecular length.
- the layer spacing is the layer spacing obtained by X-ray measurement at the temperature indicating each phase of each sample, and the calculated value is the calculated molecular length obtained simply from the software chem3D. .
- the polarization reversal current measurement will be described.
- the polarization reversal current method was used as a method of directly confirming the electric field response of polarization.
- Fig. 5 shows the outline of the equipment and
- Fig. 6 shows the equivalent circuit.
- An alternating current is applied to the liquid crystal cell 4 from the waveform generator 8, and the current flowing through the cell is measured by measuring the potential on the resistor, which is an I—V change 7, with an oscilloscope 9 (WF1945A, manufactured by NF).
- a triangular wave and a rectangular wave were applied as an alternating electric field.
- the applied waveform was measured at a frequency of 1 ⁇ , 5Hz, and 10Hz amplitude ⁇ 10-60V.
- Ferroelectric or antiferroelectric liquid crystal can be determined from the waveform when a triangular wave voltage is applied.
- FIG. 7 shows the waveform of the ferroelectric liquid crystal when a triangular wave is applied.
- ferroelectric liquid crystal is characterized by one peak in a half cycle. In the case of an antiferroelectric liquid crystal, this number of peaks is two in a half cycle, and this peak is not observed in the case of a paraelectric liquid crystal that is neither a ferroelectric liquid crystal nor an antiferroelectric liquid crystal.
- the measurement results are shown in the column of the number of triangular wave peaks in Table 1.
- the number of triangular wave peaks is the number of peaks observed in a half cycle during polarization reversal current measurement with a triangular wave applied.
- Table 1 shows the results of liquid crystal phase determination.
- the determination result of the liquid crystal phase includes the presence / absence of a tilt structure and the determination of ferroelectric or antiferroelectric.
- the presence / absence of the tilt structure was determined by comprehensively judging the measurement result of the layer spacing and the measurement result of the presence / absence of the extinction level inversion.
- the presence or absence of the tilt structure those in which the rotation of the extinction position was observed in the polarization microscope observation at the time of polarization reversal current measurement were immediately judged to have the tilt structure.
- the X-ray measurement shows that the layer spacing in the liquid crystal phase is smaller than the straight line connecting the calculated molecular lengths of the first and second liquid crystal compounds. I used it as a guideline. Specifically, the layer spacing in the crystal phase of each blend compound is much different from the calculated molecular length. However, if the force is also in the crystalline phase, the molecule has a tilt structure, and if the layer spacing in the liquid crystal phase temperature region and the layer spacing in the crystal phase temperature region are different, the liquid crystal structure is tilted. If there was a structure and the values were the same, it was judged that there was no tilt structure. This is because there is a model in which the extinction position does not rotate even if it has a tilt structure. In this example, the layer spacing between the crystal phase and the liquid crystal phase was almost the same for all the 0 to 80% compounds that were confirmed to have no extinction of rotation, and therefore the results of both were determined to be no tilt structure.
- ferroelectric or antiferroelectricity was concluded from the measurement results of the number of triangular wave peaks and the measurement result of the presence or absence of short-time square wave peaks.
- ferroelectricity, antiferroelectricity, and paraelectricity V first, when measuring the polarization reversal current using a square wave, if a peak is observed in a short time region, the ferroelectric or antiferroelectricity, the peak If it was not observed, it was judged as paraelectric.
- the polarization reversal current measurement using a triangular wave it was judged that if the number of peaks in a half cycle was one, it was ferroelectric, and if it was two, it was antiferroelectric.
- liquid crystal phase is measured in S phase.
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal Substances (AREA)
- Liquid Crystal (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007528284A JP5223141B2 (ja) | 2005-05-09 | 2006-05-09 | 液晶組成物および液晶ディスプレイ |
KR1020077028675A KR101278189B1 (ko) | 2005-05-09 | 2006-05-09 | 액정 및 액정 디스플레이 |
US11/990,081 US7910180B2 (en) | 2005-05-09 | 2006-05-09 | Liquid crystal and liquid crystal display |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005136476 | 2005-05-09 | ||
JP2005-136476 | 2005-05-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006121040A1 true WO2006121040A1 (ja) | 2006-11-16 |
Family
ID=37396548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/309317 WO2006121040A1 (ja) | 2005-05-09 | 2006-05-09 | 液晶および液晶ディスプレイ |
Country Status (5)
Country | Link |
---|---|
US (1) | US7910180B2 (ja) |
JP (1) | JP5223141B2 (ja) |
KR (1) | KR101278189B1 (ja) |
TW (1) | TWI339679B (ja) |
WO (1) | WO2006121040A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014136898A1 (ja) * | 2013-03-07 | 2014-09-12 | Dic株式会社 | 有機薄膜、これを用いた有機半導体デバイスおよび有機トランジスタ |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11256163A (ja) * | 1998-03-16 | 1999-09-21 | Lintec Corp | 強誘電性液晶化合物および組成物 |
JP2001303058A (ja) * | 2000-04-26 | 2001-10-31 | Nippon Mitsubishi Oil Corp | スメクチック液晶組成物および機能性フィルム |
JP2002161277A (ja) * | 2000-11-28 | 2002-06-04 | Rikogaku Shinkokai | 液晶および液晶ディスプレイ |
-
2006
- 2006-05-08 TW TW095116165A patent/TWI339679B/zh active
- 2006-05-09 US US11/990,081 patent/US7910180B2/en not_active Expired - Fee Related
- 2006-05-09 KR KR1020077028675A patent/KR101278189B1/ko not_active IP Right Cessation
- 2006-05-09 WO PCT/JP2006/309317 patent/WO2006121040A1/ja active Application Filing
- 2006-05-09 JP JP2007528284A patent/JP5223141B2/ja not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11256163A (ja) * | 1998-03-16 | 1999-09-21 | Lintec Corp | 強誘電性液晶化合物および組成物 |
JP2001303058A (ja) * | 2000-04-26 | 2001-10-31 | Nippon Mitsubishi Oil Corp | スメクチック液晶組成物および機能性フィルム |
JP2002161277A (ja) * | 2000-11-28 | 2002-06-04 | Rikogaku Shinkokai | 液晶および液晶ディスプレイ |
Non-Patent Citations (2)
Title |
---|
PELZL G. ET AL.: "Banana-Shaped Compounds-A New Field of Liquid Crystals", ADVANCED MATERIALS, vol. 11, no. 9, 1999, pages 707 - 724, XP000851829 * |
WATANABE J. ET AL.: "Smectic Mesophase Properties of Dimeric Compounds. 2. Distinct Formation of Smectic Structures with Antiferroelectric Orderingandrustration", MOL. CRYST. LIQ. CRYST., vol. 346, 2000, pages 77 - 86, XP008072261 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014136898A1 (ja) * | 2013-03-07 | 2014-09-12 | Dic株式会社 | 有機薄膜、これを用いた有機半導体デバイスおよび有機トランジスタ |
US10158087B2 (en) | 2013-03-07 | 2018-12-18 | DIC Corporation (Tokyo) | Organic thin film, and organic semiconductor device and organic transistor using same |
Also Published As
Publication number | Publication date |
---|---|
TW200706643A (en) | 2007-02-16 |
KR101278189B1 (ko) | 2013-06-27 |
US20100155663A1 (en) | 2010-06-24 |
JP5223141B2 (ja) | 2013-06-26 |
JPWO2006121040A1 (ja) | 2008-12-18 |
KR20080017341A (ko) | 2008-02-26 |
US7910180B2 (en) | 2011-03-22 |
TWI339679B (en) | 2011-04-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6600255B2 (ja) | ビメソゲン化合物およびメソゲン媒体 | |
Balachandran et al. | Flexoelectric behavior of bimesogenic liquid crystals in the nematic phase–observation of a new self-assembly pattern at the twist-bend nematic and the nematic interface | |
Sebastián et al. | Mesophase structure and behaviour in bulk and restricted geometry of a dimeric compound exhibiting a nematic–nematic transition | |
Kosata et al. | Liquid-crystalline dimers composed of bent-core mesogenic units | |
Zhang et al. | Synthesis of predesigned ferroelectric liquid crystals and their applications in field‐sequential color displays | |
Lee et al. | Hydrogen-Bonding-Mediated Formation of Supramolecular Rod− Coil Copolymers Exhibiting Hexagonal Columnar and Bicontinuous Cubic Liquid Crystalline Assemblies | |
Eremin et al. | Field-induced switching between states of opposite chirality in a liquid-crystalline phase | |
Wang et al. | Helical crystal assemblies in nonracemic chiral liquid crystalline polymers: where chemistry and physics meet | |
Hu et al. | Synthesis, structure, and properties of chiral liquid crystal monomers and polymers based on menthol | |
Yao et al. | A new class of star-shaped cholesteric liquid crystal containing a 1, 3, 5-trihydroxybenzene unit as a core | |
Wu et al. | Thresholdless antiferroelectricity in a novel chiral swallow-tailed liquid crystal | |
WO2006121040A1 (ja) | 液晶および液晶ディスプレイ | |
Rijeesh et al. | Liquid crystal anchoring transitions and weak anchoring interface formation at surfaces created by uniquely designed acrylate copolymers | |
Wang et al. | Synthesis and optical properties of cholesteric liquid‐crystalline oligomers displaying reversible thermochromism | |
Liu et al. | Study on new chiral liquid crystalline monomers and polymers containing menthyl groups | |
TW448228B (en) | A novel chiral swallow-tailed liquid crystal material | |
Umadevi et al. | Odd–even effects in bent-core compounds containing terminal n-alkyl carboxylate groups | |
Tsuji et al. | Chiral liquid crystal trimer exhibiting an optically uniaxial smectic phase with a double-peak polarization | |
JPH0469142B2 (ja) | ||
Wang et al. | Effect of fluorinated nematic mesogens on phase behaviors and optical properties of chiral liquid crystalline polysiloxanes | |
Lesac et al. | Polycatenar bows with single carbon atom elbow | |
JPH07786B2 (ja) | 強誘電性液晶組成物 | |
JP5127011B2 (ja) | 液晶およびその製造方法 | |
CN109072078A (zh) | 双介晶化合物和介晶介质 | |
Chen et al. | Synthesis and thermal properties of ferroelectric side-chain liquid-crystalline polysiloxanes based on naphthyl biphenylcarboxylate mesogenic groups and oligooxyethylene spacers |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020077028675 Country of ref document: KR |
|
NENP | Non-entry into the national phase |
Ref country code: RU |
|
ENP | Entry into the national phase |
Ref document number: 2007528284 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 11990081 Country of ref document: US |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 06746148 Country of ref document: EP Kind code of ref document: A1 |