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CN102219876B - Macromolecular liquid crystal alignment polymer and method for manufacturing liquid crystal display device by utilizing same - Google Patents

Macromolecular liquid crystal alignment polymer and method for manufacturing liquid crystal display device by utilizing same Download PDF

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Publication number
CN102219876B
CN102219876B CN201010148713.4A CN201010148713A CN102219876B CN 102219876 B CN102219876 B CN 102219876B CN 201010148713 A CN201010148713 A CN 201010148713A CN 102219876 B CN102219876 B CN 102219876B
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liquid crystal
polymerization monomer
single polymerization
polymerization single
polymerization
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CN102219876A (en
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王玲惠
杨凯能
李道鸿
林昱祯
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Jiangsu Hecheng Display Technology Co Ltd
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TONGYANG ENTERPRISE CO Ltd
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Abstract

The invention provides macromolecular liquid crystal alignment polymer and a method for manufacturing a liquid crystal display device by utilizing the same. The macromolecular liquid crystal alignment polymer is prepared from a first polymerization monomer and a second polymerization monomer through polymerization reaction, and is formed on relatively parallel surfaces of two transparent substrates of the liquid crystal device, so that liquid crystal molecules positioned between the transparent substrates can be aligned. Compared with a method that an alignment layer is needed to be arranged on the transparent substrate first in the conventional liquid crystal display, the method has the advantages that: the production process is effectively simplified, and the cost of the conventional alignment layer is reduced.

Description

High molecule liquid crystal orientation polymkeric substance and manufacture the method for liquid crystal indicator with it
Technical field
A kind of method that the present invention relates to LCD alignment polymkeric substance and manufacture liquid crystal indicator, relates in particular to a kind of method that is applied to the high molecule liquid crystal orientation polymkeric substance of liquid-crystal display and uses this high molecule liquid crystal orientation polymers manufacturing liquid crystal indicator.
Background technology
LCD alignment technology is the gordian technique that determines a shown image quality of liquid crystal indicator.Have liquid crystal material in display panels only and there is stable and uniform initial arrangement, just can present high-quality picture.In general liquid crystal indicator, there is the thin layer for inducing liquid crystal molecular orientation to arrange, be called liquid crystal alignment layer (alignment layers).
In industrial processes, often utilize friction method (rubbing method) that liquid crystal molecule is able to evenly distributed, first by liquid crystal alignment layer through mechanicalness friction, as the TWEED of even movement etc., make to produce the micro-groove being arranged in parallel on liquid crystal orienting film, can reach the orientation of liquid crystal molecule.The liquid crystal alignment layer material that is used at present liquid crystal indicator includes polystyrene, polyimide, polyvinyl alcohol, polyester, epoxy resin, polyurethane, polysilane etc.Wherein, the most common and that generally used is polyimide (polyimide).Because the molecule of polyimide is because having imide (imide), make high polymer main chain there is very high rigidity (rigidity) and very strong Intermolecular Forces, and possess extremely excellent uniformity and weather resistance, therefore look good with the use of friction method operation.Use the processing of mechanicalness friction method has with low cost, operation stable, orientation uniformity coefficient is good and easily control the advantages such as tilt angle, be widely used in the manufacture of liquid crystal panel.
Tradition is manufactured the process of liquid crystal indicator, need first the substrate on liquid crystal indicator to be carried out to LCD alignment processing, after respectively two substrates being cleaned, then carry out the surface of this substrate to process with liquid crystal alignment layer material, finally with friction method, complete LCD alignment operation.Substrate after LCD alignment is processed, could organize again stand, the operation such as cutting, Liquid crystal pour.That is to say, for making the substrate on liquid crystal indicator there is orientation ability, need be first through complicated formality method, just be used, in the reasonable time of expending and tooling cost.In addition, when rubbing method treatment solution crystal alignment, can produce static and micronic dust, and destroy thin type transistor or pollute etc., and reduce the quality of liquid crystal indicator.
Developed at present a kind of multiple vertical alignment liquid crystal display device (Multi-domain Vertically Aligned Liquid Crystal Display, MVA-LCD), for utilizing, there is the effect that the negative both alignment layers that lures electric anisotropy type liquid crystal and vertical direction combines to reach vertical orientation mutually.This kind of liquid crystal indicator has excellent contrast gradient and wide viewing angle, and its both alignment layers can carry out the processing of aforementioned friction method, more simple at manufacture view, extensively by industry, accepted.Yet this liquid crystal indicator still needs to configure the both alignment layers of the kinds such as polyimide, the complicated degree in manufacturing process cannot reduce, the polyimide of high price cannot effectively reduce the cost of manufacturing this type of liquid crystal indicator.
Summary of the invention
Main purpose of the present invention is to reduce liquid crystal indicator operation, and reduces and make required cost.For reaching above-mentioned purpose, the invention provides a kind of high molecule liquid crystal orientation polymkeric substance, it is mutually to carry out polyreaction gained with the first polymerization single polymerization monomer and the second polymerization single polymerization monomer, it is characterized in that, this first polymerization single polymerization monomer can be following formula (I), formula (II), formula (III) or formula (IV) compound:
Wherein, the alkyl that A is C >=1 or alkylhalide group, Y can be selected from the group that hydroxy, alkyl, ammonium root and hydrogen base form, and X is the functional group suc as formula (1) or formula (2):
L is alkyl or the alkoxyl group of C>=1, R 1for hydrogen base or methyl;
The optional group from forming to formula (VIII) suc as formula (V) of this second polymerization single polymerization monomer:
Wherein, the integer that o is>=1, R 2for methyl or hydrogen base, B can be selected from the group that hydroxy, methyl and hydrogen base form.
In addition, the present invention also provides a kind of method of application of aforementioned high molecule liquid crystal orientation polymers manufacturing liquid crystal indicator, it is characterized in that, comprises that step has:
A) provide two corresponding parallel transparency carriers, and form a liquid crystal accommodation space between these two transparency carriers;
B) liquid crystal material and aforementioned the first polymerization single polymerization monomer and the second polymerization single polymerization monomer are sealed in this liquid crystal accommodation space; And
C) this first polymerization single polymerization monomer of polymerization and this second polymerization single polymerization monomer form a high molecule liquid crystal orientation polymkeric substance on the surface corresponding to this liquid crystal accommodation space of this transparency carrier.
In another embodiment of the present invention, the method is between step b) and step c) between also have and execute alive step, make this liquid crystal material and aforementioned the first polymerization single polymerization monomer and the second polymerization single polymerization monomer all deflect to a pre-determined direction, pass through again step c) this first polymerization single polymerization monomer of polymerization and this second polymerization single polymerization monomer and form vertical orientation, strengthen anchorage force (anchoring force).
Wherein, at step b), this liquid-crystal composition is sealed in this liquid crystal accommodation space with perfusion (Injection) or liquid crystal drop laxative remedy (One Drop Fill, ODF).And at step c), this formula (I) utilizes UV-irradiation to carry out polyreaction with the polymerization single polymerization monomer shown in formula (II).
In the present invention, this first polymerization single polymerization monomer and this second polymerization single polymerization monomer utilize energy rayed to carry out polyreaction, and this energy light is visible ray or UV-light.This first polymerization single polymerization monomer and this second polymerization single polymerization monomer carry out polyreaction with the weight ratio between 1: 2.5 and 1: 50.For increasing the efficiency of polyreaction, before carrying out polyreaction, this first polymerization single polymerization monomer and this second polymerization single polymerization monomer can add a sclerosis initiator; This sclerosis initiator is 0.01% to 1% addition to the weight percent of liquid crystal material.
Through as known from the above, high molecule liquid crystal orientation polymkeric substance of the present invention and apply the beneficial effect that the method for this high molecule liquid crystal orientation polymers manufacturing liquid crystal indicator reaches compared to prior art and be:
One, the present invention effectively simplifies the manufacturing process of liquid crystal indicator, manufacture method compared to conventional liquid crystal, needn't first both alignment layers be coated on substrate, also operation need not rub this both alignment layers, therefore, be minimized manufacturing lead time and alignment layer material cost, as pi;
Two, the present invention can avoid the problem of using friction method may cause product fine rate to decline.
Accompanying drawing explanation
Fig. 1-1 to Fig. 1-4 are the preferred embodiment work flow schematic diagram of the method for the present invention's one manufacture liquid crystal indicator.
Embodiment
Relevant detailed description of the present invention and technology contents, existing accompanying drawings is as follows:
The present invention is a kind of high molecule liquid crystal orientation polymkeric substance, it is mutually to carry out polyreaction gained with the first polymerization single polymerization monomer and the second polymerization single polymerization monomer, wherein, this first polymerization single polymerization monomer can be following formula (I), formula (II), formula (III) or formula (IV) compound:
Wherein, the alkyl that A is C>=1 or alkylhalide group, as deng functional group, the odd number that h is>=1; Person very, A can be
Y can be hydroxy, alkyl, ammonium root or hydrogen base; Further, Y can be straight chain type or the branch chain type alkyl of C1~C6;
X is the functional group suc as formula (1) or formula (2):
L is alkyl or the alkoxyl group of C>=1, R 1for hydrogen base or methyl; More precisely, this L can be functional group, the integer that m, n are>=1.
In the present invention, the optional group from forming to formula (VIII) suc as formula (V) of this second polymerization single polymerization monomer:
Wherein, the integer that o is>=1, R 2for methyl or hydrogen base, B can be selected from the group that hydroxy, methyl and hydrogen base form.
Wherein, this first polymerization single polymerization monomer and this second polymerization single polymerization monomer carry out polyreaction with the weight ratio between 1: 2.5 and 1: 50.This first polymerization single polymerization monomer and this second polymerization single polymerization monomer utilize energy rayed to carry out polyreaction to form high molecule liquid crystal orientation polymkeric substance, and this energy light can be visible ray or UV-light.For accelerating polyreaction, this first polymerization single polymerization monomer and this second polymerization single polymerization monomer carry out more can adding a sclerosis initiator before polyreaction, especially a kind of ultraviolet light photopolymerization initiator or visible ray sclerosis initiator.
The present invention also provides a kind of method of application of aforementioned high molecule liquid crystal orientation polymers manufacturing liquid crystal indicator, comprises that step has:
A) provide two corresponding parallel transparency carriers, and form a liquid crystal accommodation space between these two transparency carriers;
B) liquid crystal material and aforementioned the first polymerization single polymerization monomer and the second polymerization single polymerization monomer are sealed in this liquid crystal accommodation space; And
C) this first polymerization single polymerization monomer of polymerization and this second polymerization single polymerization monomer form a high molecule liquid crystal orientation polymkeric substance on the surface corresponding to this liquid crystal accommodation space of this transparency carrier.
Consult Fig. 1-1 to shown in Fig. 1-4, for the present invention manufactures the preferred embodiment work flow schematic diagram of the method for liquid crystal indicator.As Figure 1-1, first, be arranged in parallel two corresponding transparency carrier 10a, 10b, be separated by with a plurality of spherical particles or pillar stiffener (not shown) between this substrate 10a and 10b, to form a liquid crystal accommodation space 12.This transparency carrier 10a, 10b is upper and be positioned at this liquid crystal accommodation space 12 corresponding to two surfaces, is at least provided with respectively an electrode 11a, the 11b that is electrically connected at respectively thin film transistor (not shown).Wherein, this transparency carrier 10a, 10b can be the transparent materials such as glass, quartz or soft plastic (as PET).The applicable liquid crystal indicator of the present invention comprises the wide viewing angle liquid crystal display devices such as MVA (Multi-domain Vertical Alignment), ASV (Advanced Super-V), PVA (Patterned Vertical Alignment), PSA (Polymer Stable Alignment).
Moreover, as shown in Figure 1-2, a liquid crystal material 20 and aforementioned the first polymerization single polymerization monomer 31 and the second polymerization single polymerization monomer 32 are sealed in the liquid crystal accommodation space 12 between this transparency carrier 10a and 10b; Wherein, this liquid crystal material 20 can be vertical orientation liquid crystal material, this liquid crystal material 20 and this first, second polymerization single polymerization monomer 31,32 can perfusion (Injection) or liquid crystal drop laxative remedy (One Drop Fill, ODF) be sealed in this liquid crystal accommodation space 12.
In the present invention, can select whether by this thin film transistor, to drive this electrode 11a, 11b to impose voltage in this transparency carrier 10a, 10b.If while applying voltage, this liquid crystal material 20 and this first, second polymerization single polymerization monomer 31,32 can produce and deflect to accordingly a pre-determined direction according to voltage direction, as Figure 1-3, reach the object that multidirectional line is arranged.So, the be increased vertical orientation ability of liquid-crystal display.If no-voltage puts on this transparency carrier 10a, 10b, carry out the liquid-crystal display of liquid crystal pre-arrangement method made, the lifting of its contrast ability is than less obvious.
Finally, carry out the step of this first polymerization single polymerization monomer 31 and these the second polymerization single polymerization monomer 32 polymerizations.In the present invention, this first polymerization single polymerization monomer 31 and this second polymerization single polymerization monomer 32 form a high molecule liquid crystal orientation polymkeric substance 30 after irradiating by energy light 40 on the surface corresponding to this liquid crystal accommodation space 12 of this transparency carrier 10a, 10b, as Figure 1-4.This energy light 40 that is used for carrying out polyreaction is visible ray or UV-light.If wish shortens the polymerization reaction time of this first polymerization single polymerization monomer 31 and this second polymerization single polymerization monomer 32, step b) in, also a sclerosis initiator (not shown) can be sealed in this liquid crystal accommodation space 12 together, and promote the polymerization efficiency of this first polymerization single polymerization monomer 31 and this second polymerization single polymerization monomer 32; The weight percent of this sclerosis initiator and liquid crystal material 20 is 0.01% to 1% addition, and this sclerosis initiator can be ultraviolet light photopolymerization initiator or visible ray sclerosis initiator.
In sum, high molecule liquid crystal orientation polymkeric substance of the present invention and the method for applying this high molecule liquid crystal orientation polymers manufacturing liquid crystal indicator, by the first polymerization single polymerization monomer and this second polymerization single polymerization monomer, undertaken directly on transparency carrier, forming a high molecule liquid crystal orientation polymkeric substance after polyreaction, make this liquid crystal material be reached the object of orientation.The beneficial effect that the present invention reaches compared to prior art is:
One, simplify and must first both alignment layers be coated on to the program on transparency carrier in the past, except the needed time of liquid crystal indicator is manufactured in reduction, also because saved high material cost without expensive liquid crystal alignment layer material (as pi) is set.
Two, in addition, due to the present invention, do not need to use the mechanicalness orientations such as friction method to process, can not produce static and micronic dust, relatively improve the good rate of product.
Below the present invention is described in detail, just the foregoing is only a preferred embodiment of the present invention, and can not limit scope of the invention process.Be that all equalization variations of doing according to the present patent application scope and modification etc. all should still drop in patent covering scope of the present invention.
Diagrammatical symbol explanation
10a, 10b.... transparency carrier 11a, 11b.... electrode
12.... liquid crystal accommodation space 20.... liquid crystal material
30.... high molecule liquid crystal orientation polymkeric substance 31.... the first polymerization single polymerization monomer
32.... the second polymerization single polymerization monomer 40.... energy light.

Claims (23)

1. a high molecule liquid crystal orientation polymkeric substance, described high molecule liquid crystal orientation polymkeric substance, for mutually to carry out polyreaction gained with the first polymerization single polymerization monomer and the second polymerization single polymerization monomer, is characterized in that,
Described the first polymerization single polymerization monomer can be selected from the group forming to formula (IV) suc as formula (I):
Wherein, the alkyl that A is C >=1 or alkylhalide group, Y is selected from the group that hydroxy, alkyl, ammonium root and hydrogen base form, and X is the functional group suc as formula (1) or formula (2):
L is alkyl or the alkoxyl group of C>=1, R 1for hydrogen base or methyl;
Described the second polymerization single polymerization monomer is selected from the group being formed to formula (VIII) as formula V:
Wherein, the integer that o is>=1, R 2for methyl or hydrogen base, B is selected from the group that hydroxy, methyl and hydrogen base form.
2. high molecule liquid crystal orientation polymkeric substance according to claim 1, is characterized in that, described A is functional group.
3. high molecule liquid crystal orientation polymkeric substance according to claim 1, is characterized in that, described A is or functional group, the odd number that h is>=1.
4. high molecule liquid crystal orientation polymkeric substance according to claim 1, is characterized in that the alkyl that described Y is C1~C6.
5. high molecule liquid crystal orientation polymkeric substance according to claim 1, is characterized in that, described L is or functional group, the integer that m, n are>=1.
6. high molecule liquid crystal orientation polymkeric substance according to claim 1, is characterized in that, described the first polymerization single polymerization monomer and described the second polymerization single polymerization monomer carry out polyreaction with the weight ratio between 1: 2.5 and 1: 50.
7. high molecule liquid crystal orientation polymkeric substance according to claim 1, is characterized in that, described the first polymerization single polymerization monomer and described the second polymerization single polymerization monomer carry out also adding a sclerosis initiator before polyreaction.
8. according to the high molecule liquid crystal orientation polymkeric substance described in claim 1 or 7, it is characterized in that, described the first polymerization single polymerization monomer and described the second polymerization single polymerization monomer utilize energy rayed to carry out polyreaction.
9. high molecule liquid crystal orientation polymkeric substance according to claim 8, is characterized in that, described energy light is visible ray or UV-light.
10. a method for application high molecule liquid crystal orientation polymers manufacturing liquid crystal indicator according to claim 1, is characterized in that, comprises that step has:
Two corresponding parallel transparency carriers (10a, 10b) are provided, and form a liquid crystal accommodation space (12) between described two transparency carriers (10a, 10b);
One liquid crystal material (20), one first polymerization single polymerization monomer (31) and one second polymerization single polymerization monomer (32) are sealed in described liquid crystal accommodation space (12), wherein, described the first polymerization single polymerization monomer (31) is selected from the group forming to formula (IV) suc as formula (I):
Wherein, the alkyl that A is C >=1 or alkylhalide group, Y is selected from the group that hydroxy, alkyl, ammonium root and hydrogen base form, and X is the functional group suc as formula (1) or formula (2):
L is alkyl or the alkoxyl group of C>=1, R 1for hydrogen base or methyl;
Described the second polymerization single polymerization monomer (32) is selected from the group being formed to formula (VIII) as formula V:
Wherein, the integer that o is>=1, R 2for methyl or hydrogen base, B is selected from the group that hydroxy, methyl and hydrogen base form; And
The first polymerization single polymerization monomer (31) and described the second polymerization single polymerization monomer (32) described in polymerization form a high molecule liquid crystal orientation polymkeric substance (30) on the surface corresponding to described liquid crystal accommodation space (12) of described transparency carrier (10a, 10b).
The method of 11. manufacture liquid crystal indicators according to claim 10, is characterized in that, also has and executes alive step.
The method of 12. manufacture liquid crystal indicators according to claim 10, is characterized in that, with perfusion, described liquid-crystal composition is sealed in described liquid crystal accommodation space (12).
The method of 13. manufacture liquid crystal indicators according to claim 10, is characterized in that, with liquid crystal drop laxative remedy, described liquid-crystal composition is sealed in described liquid crystal accommodation space (12).
The method of 14. manufacture liquid crystal indicators according to claim 10, is characterized in that, described A is functional group.
The method of 15. manufacture liquid crystal indicators according to claim 10, is characterized in that, described A is or functional group, the odd number that h is>=1.
The method of 16. manufacture liquid crystal indicators according to claim 10, is characterized in that, described L is or functional group, the integer that m, n are>=1.
The method of 17. manufacture liquid crystal indicators according to claim 10, is characterized in that, the alkyl that described Y is C1~C6.
The method of 18. manufacture liquid crystal indicators according to claim 10, is characterized in that, makes described the first polymerization single polymerization monomer (31) and described the second polymerization single polymerization monomer (32) carry out polyreaction with the weight ratio between 1: 2.5 and 1: 50.
19. manufacture the method for liquid crystal indicator according to claim 10, it is characterized in that, before described the first polymerization single polymerization monomer (31) and described the second polymerization single polymerization monomer (32) carry out polyreaction, also add a sclerosis initiator.
The method of 20. manufacture liquid crystal indicators according to claim 19, is characterized in that, the weight percent of described sclerosis initiator and liquid crystal material (20) is 0.01% to 1% addition.
21. according to the manufacture method of the liquid crystal indicator described in claim 10 or 19, it is characterized in that, utilizes energy light (40) to irradiate and makes described the first polymerization single polymerization monomer (31) and described the second polymerization single polymerization monomer (32) carry out polyreaction.
The manufacture method of 22. liquid crystal indicators according to claim 21, is characterized in that, described energy light (40) is visible ray or UV-light.
The manufacture method of 23. liquid crystal indicators according to claim 10, is characterized in that, described liquid crystal material (20) is vertical orientation liquid crystal material.
CN201010148713.4A 2010-04-14 2010-04-14 Macromolecular liquid crystal alignment polymer and method for manufacturing liquid crystal display device by utilizing same Active CN102219876B (en)

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WO2014061755A1 (en) * 2012-10-19 2014-04-24 シャープ株式会社 Liquid-crystal display device and process for producing liquid-crystal display device
CN102967962B (en) * 2012-11-26 2015-01-14 京东方科技集团股份有限公司 Transparent polymer dispersed liquid crystal display device and manufacturing method and application thereof
CN104375328A (en) * 2014-11-28 2015-02-25 深圳市华星光电技术有限公司 Display panel and manufacturing method of display panel

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JP4122516B2 (en) * 2003-11-12 2008-07-23 Jsr株式会社 Liquid crystal alignment film and manufacturing method thereof
WO2006027076A1 (en) * 2004-09-06 2006-03-16 Merck Patent Gmbh Polymerisable liquid crystal material
CN103113230B (en) * 2007-02-06 2015-11-11 友达光电股份有限公司 Photo-sensitive monomer, liquid crystal material, liquid crystal panel and preparation method thereof, optoelectronic equipment and preparation method thereof
CN101008783B (en) * 2007-02-07 2010-04-14 友达光电股份有限公司 Photosensitive monomer and liquid crystal panel, and manufacture method therefor
CN101131510A (en) * 2007-10-11 2008-02-27 友达光电股份有限公司 LCD material combination and LCD device containing the same

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