WO2013159400A1 - 液晶介质组合物、使用其的液晶显示器及其制作方法 - Google Patents
液晶介质组合物、使用其的液晶显示器及其制作方法 Download PDFInfo
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- WO2013159400A1 WO2013159400A1 PCT/CN2012/075267 CN2012075267W WO2013159400A1 WO 2013159400 A1 WO2013159400 A1 WO 2013159400A1 CN 2012075267 W CN2012075267 W CN 2012075267W WO 2013159400 A1 WO2013159400 A1 WO 2013159400A1
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- 0 *C(CC1)CCC1c1ccc(*)cc1 Chemical compound *C(CC1)CCC1c1ccc(*)cc1 0.000 description 1
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- 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
- C09K19/32—Non-steroidal liquid crystal compounds containing condensed ring systems, i.e. fused, bridged or spiro ring systems
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- 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
- C09K19/32—Non-steroidal liquid crystal compounds containing condensed ring systems, i.e. fused, bridged or spiro ring systems
- C09K19/322—Compounds containing a naphthalene ring or a completely or partially hydrogenated naphthalene ring
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- 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
- C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
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- 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
- C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
- C09K19/54—Additives having no specific mesophase characterised by their chemical composition
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- 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
- C09K2019/0425—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit characterized by a specific unit that results in a functional effect
- C09K2019/0437—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit characterized by a specific unit that results in a functional effect the specific unit being an optically active chain used as linking group between rings or as end group
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- 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
- C09K2019/0444—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit characterized by a linking chain between rings or ring systems, a bridging chain between extensive mesogenic moieties or an end chain group
- C09K2019/0448—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit characterized by a linking chain between rings or ring systems, a bridging chain between extensive mesogenic moieties or an end chain group the end chain group being a polymerizable end group, e.g. -Sp-P or acrylate
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- 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
- G02F1/13775—Polymer-stabilized liquid crystal layers
Definitions
- Liquid crystal medium composition Liquid crystal medium composition, liquid crystal display using the same, and manufacturing method thereof
- the present invention relates to liquid crystal display technology, and more particularly to a liquid crystal medium composition, a liquid crystal display using the same, and a method of fabricating the same. Background technique
- PSVA Polymer stabilized vertical alignment
- Negative liquid crystal material is used. When no electric field is applied, the liquid crystal molecules are arranged perpendicular to the surface of the substrate. A certain amount of monomer which can be polymerized under ultraviolet light is added to the liquid crystal material, and the cylinder is called RM. After the liquid crystal is added to the substrate for combination, a signal of a suitable frequency, waveform, and voltage is applied to the panel to cause the liquid crystal molecules to be tilted in a predetermined direction, and the panel is irradiated with ultraviolet light to polymerize the RM to form a polymer deposited in the panel.
- the surface of the two substrates which is a polymer bump, can make the liquid crystal molecules have a certain pretilt angle without applying voltage, thereby accelerating the response speed of the liquid crystal molecules.
- Relative friction (Rubbing) can only be aligned in a single direction.
- the advantage of this method is that multi-angle alignment (producing pretilt angle) can be achieved in different areas in the panel.
- the photoreactive groups contained in RM (Reactive Mesogene Reactive Mesogen) used in PSVA technology are generally methacrylate groups, acrylate groups, vinyl groups, vinyloxy groups, as disclosed in U.S. Patent No. 7,169,449, et al. Epoxy groups and the like, among which the most commonly used are methacrylate groups.
- RM Reactive Mesogene Reactive Mesogen
- direct use of UV light causes some problems in these RM reactions:
- the main wavelength range of photopolymerization of RM containing such groups is 200-300 nm, and ultraviolet light having a wavelength exceeding 300 nm can also react with RM.
- the efficiency is low, the speed is very slow, and there is no good mass production.
- the use of light sources below 300 nm will bring many disadvantages and difficulties to the fabrication of the panel:
- the ultraviolet light below 300 nm has higher energy, which will cause the price of the alignment layer material polyimide (Polyimide) and liquid crystal molecules to be destroyed.
- the VHR (voltage holding ratio) of the panel is lowered, the image sticking becomes severe, and the RA (reliability analysis) results are deteriorated.
- the glass used to fabricate the TFT-LCD substrate generally has a certain absorption effect on ultraviolet light below 300 nm, which causes the illumination efficiency of the light source to decrease.
- the liquid crystal material itself has a strong absorption effect on ultraviolet light below 300 nm.
- Ultraviolet light with a wavelength below 300 nm cannot pass through the liquid crystal material at all, that is to say, most of the ultraviolet light from the light source is absorbed by the liquid crystal material (destructive action), and only a small part is absorbed by the RM to cause polymerization, which occurs.
- this In the extremely shallow position on the light entrance side, this in turn causes unevenness in the reaction between the light incident side and the backlight side RM, and the alignment effect of the panel is lowered.
- the 380 nm ultraviolet light has a strong absorbing sensitizer, and the sensitizer shifts the reaction wavelength of the polymerizable monomer to a long wavelength, and the polymerization efficiency is high and the polymer uniformity is good.
- Another object of the present invention is to provide a liquid crystal display and a method for fabricating the same, wherein the liquid crystal medium composition can be irradiated with ultraviolet light having a wavelength of 300-380 nm, avoiding the absorption band of the liquid crystal material, and reducing the ultraviolet light to the liquid crystal material. And the destruction of the alignment material PI (polyimide), and the polymerization efficiency and uniformity of the polymerizable monomer are improved, and the alignment effect of the panel is improved, thereby improving the quality and life of the panel.
- the alignment material PI polyimide
- the present invention provides a liquid crystal medium composition
- a liquid crystal medium composition comprising the components: a liquid crystal material, a polymerizable monomer, a stabilizer, and a sensitizer, the sensitizer for ultraviolet light having a wavelength in the range of 300 to 380 nm. It has strong absorption, and its structure is composed of a fused ring aromatic hydrocarbon composed of a plurality of benzene rings and a substituent attached to the aromatic ring.
- the sensitizer is one or more of the following molecular structural formulas:
- X represents a substituent group attached to the ring structure
- n is an integer of 1-4
- a plurality of n in any of the above formulas are the same or different, and if ⁇ >1, it means that the same ring structure has a plurality of substituents.
- Group X which are the same or different, and the substituent groups represented by X are: -H, -F, -Cl, -Br, -I, -CN, -N0 2 , -R , -OR , -CO-R , - OCO-R, -COO-R, or -(OCH 2 CH 2 ) nl CH 3 , R represents a linear or branched alkyl group of 1 to 12 carbon atoms, and nl is an integer of 1-5.
- the sensitizer is added in an amount of 5 ppm to 1000 ppm based on the total weight of the liquid crystal medium composition.
- the liquid crystal material comprises at least one liquid crystal molecule having the following structural formula:
- X represents a substituent group attached to the ring structure
- ⁇ is an integer of 1-4
- the phase between ⁇ on different ring structures Same or different, if ⁇ >1 , it means that the same ring structure has a plurality of substituent groups X, which are the same or different, and the substituent groups represented by X are: -H, -F, -Cl, -Br, -1, - CN, or -N0 2
- Y 2 are -R, -0-R, -CO-R, -OCO-R, -COO-R, or -(OCH 2 CH 2 ) nl CH 3
- R represents 1- A linear or branched alkyl group consisting of 12 carbon atoms, and nl is an integer of 1-5, which is the same or different from Y 2 .
- the polymerizable monomer comprises at least one polymerizable molecule having the following structural formula:
- P 2 represents a polymerizable group which is the same or different and is a methacrylate group, an acrylate group, a vinyl group, a vinyloxy group or an epoxy group; and a linking group with L 2 represents the same Or different, is a carbon-carbon single bond, -0-, -COO-, -OCO-, -CH 2 0-, -
- X represents a substituent group attached to the ring structure
- ⁇ is an integer of 1-4
- a plurality of ⁇ in any formula are the same or different, and if 11>1, it means that the same ring structure has a plurality of substituent groups X.
- substituent group represented by X is: -H, -F, -Cl, -Br, -1, -CN or -N0 2 .
- the stabilizer comprises at least one molecule having the following structural formula:
- the formula represents a straight or branched alkyl group having 1 to 9 carbon atoms, and n is an integer of 1 to 4, and if 11>1, it means that the same benzene ring structure has a plurality of substituent groups R l which are the same or different; R 2 represents a linear or branched alkyl group having 1 to 36 carbon atoms; L is a carbon-carbon single bond, -0-, -COO-, -OCO-, -CH 2 0-, -OCH 2 0-, -0(CH 2 ) 2 0-, -COCH 2 - or methylene.
- the present invention also provides a liquid crystal display comprising: an upper substrate and a lower substrate disposed opposite to each other, and a liquid crystal medium composition disposed between the upper substrate and the lower substrate, the liquid crystal medium composition comprising a component: a liquid crystal material a polymerizable monomer, a stabilizer, and a sensitizer, the sensitizer having strong absorption to ultraviolet light having a wavelength in the range of 300 to 380 nm, and the structure thereof is composed of a plurality of benzene rings
- n are the same or different. If ⁇ >1, it means that the same ring structure has a plurality of substituent groups X, which are the same or different, and the substituent groups represented by X are: -H, -F, -Cl , -Br , - I , -CN , -N0 2 , -R , -OR , -CO-R , -OCO-R , -COO-R , or - (OCH 2 CH 2 ) nl CH 3 , R represents 1 A linear or branched alkyl group consisting of -12 carbon atoms, and nl is an integer of 1-5.
- the polymerization reaction occurs under ultraviolet light irradiation of 380 nm; the sensitizer is added in an amount of 5 ppm to 1000 ppm based on the total weight of the liquid crystal medium composition.
- the liquid crystal material comprises at least one liquid crystal molecule having the following structural formula:
- X represents a substituent group attached to the ring structure
- ⁇ is an integer of 1-4
- ⁇ between different ring structures is the same or different
- ⁇ >1 it means that the same ring structure has a plurality of substituent groups X, They are the same or different, and the substituent group represented by X is: -H, -F, -Cl, -Br, -1, -CN, or -N0 2
- Y 2 is -R, -OR, -CO-R , -OCO-R, -COO-R, or -(OCH 2 CH 2 ) nl CH 3
- R represents a linear or branched alkyl group of 1 to 12 carbon atoms
- nl is an integer of 1-5, The same or different between Y 2 and Y 2 .
- the polymerizable monomer comprises at least one polymerizable molecule having the following structural formula:
- P 2 represents a polymerizable group which is the same or different and is a methacrylate group, an acrylate group, a vinyl group, a vinyloxy group or an epoxy group
- a linking group with L 2 represents the same Or different, is a carbon-carbon single bond, -0-, -COO-, -OCO-, -CH 2 0-, - OCH 2 0-, -0(CH 2 ) 2 0-, -COCH2- or methylene
- X represents the core group,
- X represents a substituent group attached to the ring structure
- n is an integer of 1-4
- a plurality of n in any formula are the same or different, and if 11>1, it means that the same ring structure has a plurality of substituent groups X.
- substituent group represented by X is: -H, -F, -Cl, -Br, -1, -CN or -N0 2 .
- the stabilizer comprises at least one molecule having the following structural formula:
- the formula represents a straight or branched alkyl group having 1 to 9 carbon atoms, and n is an integer of 1 to 4, and if 11>1, it means that the same benzene ring structure has a plurality of substituent groups R l which are the same or different; R 2 represents a linear or branched alkyl group having 1 to 36 carbon atoms; L is a carbon-carbon single bond, -0-, -COO-, -OCO-, -CH 2 0-, -OCH 2 0-, -0(CH 2 ) 2 0-, -COCH 2 - or methylene.
- the upper substrate includes an upper glass substrate and a black matrix disposed on one side of the lower substrate, R, G, and B pixels, a substrate pitch support and a common electrode
- the lower substrate includes a lower glass substrate and is disposed on the surface thereof
- the TFT array, the ITO pixel electrode and the common electrode on one side of the substrate are coated with an alignment layer on the surface opposite to the upper and lower substrates, and the alignment layer is formed of an alignment material polyimide.
- the present invention further provides a method of fabricating the above liquid crystal display, comprising the steps of:
- Step 1 Providing upper and lower substrates and the liquid crystal medium composition
- Step 2 dropping a liquid crystal medium composition onto the lower substrate
- Step 3 the upper substrate is relatively parallel to the lower substrate and the lower substrate, so that the liquid crystal medium composition is disposed between the upper and lower substrates to form a panel;
- Step 4 The ultraviolet light having a wavelength of 300-380 nm is used to illuminate the panel from the direction of the upper substrate, and the polymerizable monomer of the liquid crystal dielectric composition is subjected to polymerization reaction under the ultraviolet light of the wavelength of 300-380 nm to achieve the purpose of alignment.
- Step 1 further includes the step of preparing the upper and lower substrates: providing an upper glass substrate and a lower glass substrate, and providing a black matrix, R, G, and B pixels on the upper glass substrate, the substrate spacing support, the common electrode, and the coating alignment layer Forming an upper substrate; providing a TFT array and an ITO image on the lower glass substrate
- the element electrode, the common electrode and the coating alignment layer form a lower substrate; and the alignment layers are each formed of an alignment material polyimide.
- the 380 nm ultraviolet light has a strong absorbing sensitizer, and the sensitizer can interact with the polymerizable monomer to form an exciplex, which can transfer the absorbed energy to the polymerizable monomer to cause polymerization thereof.
- the reaction wavelength of the polymerizable monomer is shifted to a long wavelength (300-380 nm), the polymerization efficiency is high, and the polymer uniformity is good.
- the liquid crystal display produced by using the liquid crystal medium composition can be irradiated with ultraviolet light having a wavelength of 300-380 nm, avoiding the absorption band of the liquid crystal material, reducing the damage effect of the ultraviolet light on the liquid crystal material and the alignment material PI, and improving the polymerizable single sheet.
- the polymerization efficiency and uniformity of the body improve the alignment effect of the panel, thereby improving the quality and life of the panel, achieving stable mass production, and the obtained liquid crystal display has high reliability.
- the liquid crystal medium composition provided by the present invention comprises components: a liquid crystal material, a polymerizable monomer, a stabilizer and a sensitizer, and the sensitizer has strong absorption to ultraviolet light having a wavelength in the range of 300-380 nm,
- the sensitizer forms an exciplex with the polymerizable monomer, transfers the absorbed energy to the polymerizable monomer, and initiates polymerization of the polymerizable monomer.
- the structure of the sensitizer is composed of a fused ring aromatic hydrocarbon composed of a plurality of benzene rings and a substituent attached to the aromatic ring.
- the sensitizer may be one or more of the following molecular structural formulas:
- X represents a substituent group attached to the ring structure
- n is an integer of 1-4, as shown by the molecular structural formula, wherein (X) n is attached to the ring by a non-fixed connection, indicating (X) n
- the position on the ring is any position on the ring that can be connected, and the number is not limited to one, and one or more of the equal positions may contain (X)n.
- Any of the formulas represented by Formula I to Formula IX may be the same or different between a plurality of n, and if ⁇ >1, it means that the same ring structure has a plurality of substituent groups X, and a plurality of Xs may be the same or different.
- the substituent group represented by X may be: -H, -F, -Cl, -Br, -1, -CN, -N0 2 , -R, -0-R, -CO-R, -OCO-R, - COO-R, or -(OCH 2 CH 2 ) nl CH 3 , R represents a linear or branched alkyl group consisting of 1 to 12 carbon atoms, and nl is an integer of 1 to 5.
- the sensitizers have similar chemical structures and all have a large ⁇ -conjugated system. Generally, the larger the conjugated system is, the longer the absorption wavelength is.
- a material having a larger conjugated system such as tea has a strong absorption spectrum at 240-320 nm, and a strong absorption spectrum at 300-360 nm.
- the sensitizer is added in an amount of 5 ppm to 1000 ppm based on the total weight of the liquid crystal medium composition, and the sensitizer may be used singly or in combination of plural kinds.
- the liquid crystal material comprises at least one liquid crystal molecule having the following structural formula:
- X represents a substituent group attached to the ring structure
- n is an integer of 1-4
- n of different ring structures may be the same or different, and if ⁇ >1, it means that the same ring structure has a plurality of substituent groups X, They may be the same or different, and the substituent group represented by X may be: -H, -F, -Cl, -Br, -1, -CN, or -N0 2 , Y!
- Y 2 are -R, -0- R, -CO-R, -OCO-R, -COO-R, or -(OCH 2 CH 2 ) nl CH 3
- R represents a linear or branched alkyl group of 1 to 12 carbon atoms
- nl is 1 An integer of -5, where ⁇ and Y 2 may be the same or different.
- the polymerizable monomer comprises at least one polymerizable molecule having the following structural formula:
- P 2 represents a polymerizable group, which may be the same or different, and is a methacrylate group, an acrylate group, a vinyl group, a vinyloxy group or an epoxy group; and a linking group with L 2 represents The same or different, a carbon-carbon single bond, -0-, -C00-, -0C0-, -CH 2 0-, - OCH 2 0-, -0(CH 2 ) 2 0-, -COCH2- or sub Methyl;
- X represents a core group,
- X represents a substituent group attached to the ring structure
- n is an integer of 1-4, and a plurality of n in any formula may be the same or different, and if 11>1, it means that the same ring structure has a plurality of substituent groups.
- X which are the same or different, and the substituent group represented by X is: -H, -F, -Cl, -Br, -1, -CN or -N0 2 .
- the stabilizer comprises at least one molecule having the following structural formula:
- the formula represents a straight or branched alkyl group having 1 to 9 carbon atoms, and ⁇ is an integer of 1 to 4, and if 11>1, it means that the same benzene ring structure has a plurality of substituent groups R l which may be the same or different ;
- R 2 represents a straight or branched alkyl group having 1 to 36 carbon atoms;
- L is a carbon-carbon single bond, -0-, -COO-, - OCO-, -CH 2 0-, -OCH 2 0- , -0(CH 2 ) 2 0-, -COCH 2 - or methylene.
- Polymerization occurs under irradiation of 300-380 nm ultraviolet light.
- ultraviolet light having a wavelength of 300 to 380 nm may be used, and the ultraviolet light in the wavelength band is little or not absorbed by the liquid crystal material, thereby reducing the damage to the liquid crystal material.
- the sensitizer has a strong absorption effect on the ultraviolet light of the wavelength band, and forms an exciplex with the polymerizable monomer in the wavelength band, and transfers the absorbed energy to the polymerizable monomer to initiate polymerization of the polymerizable monomer.
- the reaction serves to shift the reaction wavelength of the polymerizable monomer to a long wavelength (the reaction wavelength is shifted from 200 to 300 nm to 300 to 380 nm), and the sensitizer itself does not undergo any chemical reaction, and mainly serves only as an energy transfer. Therefore, there is no negative effect on products such as liquid crystal medium compositions and liquid crystal displays.
- the liquid crystal medium composition of the present invention is applicable to a display, and the liquid crystal display using the liquid crystal medium composition of the present invention comprises: an upper substrate and a lower substrate disposed opposite to each other, and a substrate disposed between the upper substrate and the lower substrate Liquid crystal medium composition.
- the upper substrate includes an upper glass substrate and a black matrix disposed on a side facing the lower substrate, R, G, and B pixels, a substrate pitch support and a common electrode
- the lower substrate includes a lower glass substrate and is disposed on the surface
- a data line, a Gate line, a TFT array, an ITO pixel electrode, a common electrode, and the like on one surface of the upper substrate are coated with an alignment layer on the surfaces facing the upper and lower substrates, and the alignment layer is formed of an alignment material polyimide.
- the liquid crystal medium composition is added with the sensitizer, which has a strong absorption effect on ultraviolet light having a wavelength of 300-380 nm, and is irradiated with ultraviolet light (wavelength of 300-380 nm) corresponding to the liquid crystal medium composition.
- the sensitizer is transferred to the polymerizable monomer after absorbing energy in the wavelength band, and the polymerizable monomer is polymerized, and the reaction effect and the uniformity are high, the polymer is formed uniformly, and the alignment effect of the liquid crystal display panel is improved, thereby improving The quality and longevity of the panel achieve stable mass production, and the resulting liquid crystal display has high reliability.
- the manufacturing method of the liquid crystal display of the present invention comprises the following steps:
- Step 1 Providing upper and lower substrates and a liquid crystal medium composition; the liquid crystal medium composition is the liquid crystal medium composition of the present invention.
- the step further includes the steps of: 1. fabricating the upper and lower substrates: providing an upper glass substrate and a lower glass substrate, and providing a black matrix, R, G, and B pixels on the upper glass substrate, the substrate spacing support, the common electrode, and the coating alignment layer Forming an upper substrate; and providing a Data line, a Gate line, a TFT array, an ITO pixel electrode, a common electrode, a coating alignment layer, and the like on the lower glass substrate, and the alignment layers are each formed of an alignment material polyimide.
- Step 2 The liquid crystal medium composition is dropped onto the lower substrate; the liquid crystal medium composition is dropped onto the lower substrate having the alignment layer by ODF (One Drop Filling).
- ODF One Drop Filling
- a sealant frame is first disposed on the lower substrate, and the liquid crystal medium composition is dropped on the lower substrate. Inside the plastic frame.
- Step 3 the upper substrate is combined with the lower substrate and the lower substrate, so that the liquid crystal medium composition is disposed between the upper and lower substrates to form a panel; when combined, the surface of the upper substrate having the alignment layer is combined with the lower substrate. Therein, a liquid crystal medium composition is combined between the upper and lower substrates, and the sealant frame is cured to reinforce the panel structure formed by the combination.
- Step 4 The ultraviolet light having a wavelength of 300-380 nm is used to illuminate the panel from the direction of the upper substrate, and the polymerizable monomer of the liquid crystal dielectric composition is subjected to polymerization reaction under the ultraviolet light of the wavelength of 300-380 nm to achieve the purpose of alignment.
- ultraviolet light having a wavelength of 310 to 380 nm is preferably used to illuminate the panel.
- the sensitizer absorbs ultraviolet light by the irradiation of ultraviolet light, and the sensitizer forms an exciplex with the polymerizable monomer, and transfers the absorbed energy to the polymerizable monomer, thereby causing the polymerizable monomer to be
- the polymerization reaction occurs in the wavelength range of 300-380 nm, the reaction efficiency is high, the uniformity of the formed polymer is good, and the alignment effect of the panel is improved.
- the wavelength of the ultraviolet light is 300-380 nm, the absorption band of the liquid crystal material is avoided, and the damage of the ultraviolet light on the liquid crystal material and the alignment layer is greatly reduced. Therefore, the quality and life of the liquid crystal display panel can be improved, and stable mass productivity can be achieved, and the liquid crystal display produced by the manufacturing method has high reliability.
- the upper substrate and the lower substrate are formed with a Data line, a Gate line, a TFT array, an ITO pixel electrode, a common electrode, and the like, and the surface of the substrate is coated with an alignment layer; the upper substrate has a black matrix and R, G, and B pixels, and the substrate Pitch support, common electrode, the outermost surface is also coated by the alignment layer; using a negative liquid crystal material, and mixing with a polymerizable monomer, a sensitizer and a stabilizer to obtain a liquid crystal medium combination
- the sensitizer was added in an amount of 70 ppm in the liquid crystal medium composition.
- the surface is irradiated with ultraviolet light having a wavelength of 310 to 380 nm from the upper substrate to polymerize the polymerizable monomer to form a polymer to achieve alignment.
- Example 1 the difference is in the molecular structure and content of the sensitizer, and the wavelength range of the ultraviolet light, as shown in Table 1 below.
- the liquid crystal medium composition of the present invention shifts the reaction wavelength of the polymerizable monomer from 200-300 nm to 300-380 nm by adding a sensitizer, avoids the absorption band of the liquid crystal material, and improves the polymerizability. The reaction efficiency and uniformity of the monomer.
- a liquid crystal display fabricated using the liquid crystal medium composition which uses ultraviolet light having a wavelength of 300-380 nm, avoiding absorption of liquid crystal material
- the receiving band greatly reduces the damage effect of ultraviolet light on the liquid crystal material and the alignment material PI of the liquid crystal display, improves the quality and life of the liquid crystal display panel, and achieves stable mass production, and the obtained liquid crystal display has high reliability.
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Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US13/516,718 US20130286317A1 (en) | 2012-04-28 | 2012-05-10 | Liquid Crystal Medium Composition, Liquid Crystal Display Using Same and Manufacturing Method Thereof |
DE112012006293.0T DE112012006293B4 (de) | 2012-04-28 | 2012-05-10 | Flüssigkristallmediumzusammensetzung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CN201210132934.1A CN102660300B (zh) | 2012-04-28 | 2012-04-28 | 液晶介质组合物、使用其的液晶显示器及其制作方法 |
CN201210132934.1 | 2012-04-28 |
Publications (1)
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WO2013159400A1 true WO2013159400A1 (zh) | 2013-10-31 |
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Cited By (1)
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US10421708B2 (en) | 2015-06-24 | 2019-09-24 | Changzhou Tronly New Electronic Materials Co., Ltd. | Sensitizer for UV-LED photocuring and preparation method and use thereof |
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CN102851037A (zh) * | 2012-09-21 | 2013-01-02 | 深圳市华星光电技术有限公司 | 液晶介质混合物及使用其的液晶显示器 |
CN102863970A (zh) * | 2012-09-21 | 2013-01-09 | 深圳市华星光电技术有限公司 | 液晶介质混合物及使用其的液晶显示器 |
CN102863971A (zh) * | 2012-09-21 | 2013-01-09 | 深圳市华星光电技术有限公司 | 液晶介质混合物及使用其的液晶显示器 |
CN102876336A (zh) * | 2012-09-21 | 2013-01-16 | 深圳市华星光电技术有限公司 | 液晶介质混合物及使用其的液晶显示器 |
US20140085592A1 (en) * | 2012-09-21 | 2014-03-27 | Sheznhen China Star Optoelectronics Technology Co. Ltd. | Mixture for Liquid Crystal Medium and Liquid Crystal Display Using the Same |
CN102876338A (zh) * | 2012-09-21 | 2013-01-16 | 深圳市华星光电技术有限公司 | 液晶介质混合物及使用其的液晶显示器 |
CN102863969B (zh) * | 2012-09-21 | 2014-07-16 | 深圳市华星光电技术有限公司 | 液晶介质混合物及使用其的液晶显示器 |
CN102888230A (zh) * | 2012-09-21 | 2013-01-23 | 深圳市华星光电技术有限公司 | 液晶介质混合物及使用其的液晶显示器 |
US8801965B2 (en) | 2012-10-09 | 2014-08-12 | Shenzen China Star Optoelectronic Technology co., Ltd. | Liquid crystal medium composition and liquid crystal display panel manufactured with same |
CN102851036A (zh) * | 2012-10-09 | 2013-01-02 | 深圳市华星光电技术有限公司 | 液晶介质组合物及使用其制作的液晶显示面板 |
CN103484131B (zh) * | 2013-08-29 | 2016-08-10 | 深圳市华星光电技术有限公司 | 液晶介质组合物 |
CN104155801A (zh) * | 2014-07-29 | 2014-11-19 | 京东方科技集团股份有限公司 | 液晶显示装置 |
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- 2012-05-10 DE DE112012006293.0T patent/DE112012006293B4/de active Active
- 2012-05-10 WO PCT/CN2012/075267 patent/WO2013159400A1/zh active Application Filing
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CN102660300A (zh) | 2012-09-12 |
DE112012006293B4 (de) | 2019-03-07 |
CN102660300B (zh) | 2014-02-12 |
DE112012007302B3 (de) | 2021-04-01 |
DE112012006293T5 (de) | 2015-01-22 |
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