CN102220140A - Liquid crystal alignment composition and method for manufacturing liquid crystal display device - Google Patents
Liquid crystal alignment composition and method for manufacturing liquid crystal display device Download PDFInfo
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- CN102220140A CN102220140A CN2010101521652A CN201010152165A CN102220140A CN 102220140 A CN102220140 A CN 102220140A CN 2010101521652 A CN2010101521652 A CN 2010101521652A CN 201010152165 A CN201010152165 A CN 201010152165A CN 102220140 A CN102220140 A CN 102220140A
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Abstract
The invention provides a liquid crystal alignment composition and a method for manufacturing a liquid crystal display device through the liquid crystal alignment composition. The liquid crystal alignment composition mainly comprises a heterocycle monomer and an acrylic monomer, wherein the heterocycle monomer and the acrylic monomer mutually react and polymerize to form a liquid crystal alignment layer on the two corresponding surfaces of a base plate, and the two corresponding surfaces of the base plate are positioned in a liquid crystal accommodating space. Accordingly, when the liquid crystal display device is manufactured, the alignment layer does not need to be firstly arranged on the base plate, so that the manufacturing procedure and the cost can be effectively reduced.
Description
Technical field
The present invention relates to a kind of LCD alignment composition, relate in particular to a kind of LCD alignment composition with heterocyclic monomer.The invention still further relates to a kind of method of making liquid crystal indicator.
Background technology
The LCD alignment technology is the gordian technique that determines a shown image quality of liquid crystal indicator.The liquid crystal material that has only in the display panels has stable and uniform initial arrangement, just can present high-quality picture.Have the thin layer that is used for inducing the arrangement of liquid crystal molecular orientation in the general liquid crystal indicator, be called liquid crystal alignment layer (alignment layers).
On industrial processes, it is evenly distributed often to utilize friction method (rubbing method) that liquid crystal molecule is able to, earlier with liquid crystal alignment layer through the mechanicalness friction, as the TWEED that evenly moves etc., make little groove that generation is arranged in parallel on the liquid crystal orienting film, can reach the orientation of liquid crystal molecule.The liquid crystal alignment layer material that is used in liquid crystal indicator at present comprises polystyrene, polyimide, polyvinyl alcohol, polyester, Resins, epoxy, polyurethane, polysilane etc.Wherein, the most common and that generally be used is polyimide (polyimide).Because the molecule of polyimide is because of having imide (imide), make high polymer main chain have very high stiffness (rigidity) and very strong Intermolecular Forces, and possess extremely excellent uniformity and weather resistance, therefore look good with the use of friction method technology.Use that the processing of mechanicalness friction method has with low cost, process stabilizing, the orientation uniformity coefficient is good and control advantage such as tilt angle easily, be widely used in the manufacturing of liquid crystal panel.
Tradition is made the process of liquid crystal indicator, needing earlier the substrate on the liquid crystal indicator to be carried out LCD alignment handles, after respectively two substrates being cleaned, carry out again the surface of this substrate is handled with liquid crystal alignment layer material, finish the LCD alignment operation with the friction method at last.Substrate after handling through LCD alignment could be organized operations such as upright, cutting, liquid crystal injection again.That is to say to have the orientation ability, need just to be used through complicated formality works earlier, expend suitable time and tooling cost for making the substrate on the liquid crystal indicator.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 a kind of multiple vertical alignment liquid crystal display device (Multi-domain Vertically Aligned Liquid Crystal Display at present, MVA-LCD), its utilization has and negative lures the both alignment layers of electric anisotropy type liquid crystal and vertical direction to make up mutually to reach the effect of vertical orientation.This kind 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, and is more simple at manufacture view, extensively accepted by industry.Yet this liquid crystal indicator still need dispose the both alignment layers of kinds such as polyimide, and the complicated degree in manufacturing process can't reduce, the polyimide of high price made the cost of making this type of liquid crystal indicator effectively to reduce.
Summary of the invention
Main purpose of the present invention, the operation that is to reduce liquid crystal indicator, and reduce and make required cost.For achieving the above object, the invention provides a kind of LCD alignment composition, it is characterized in that, comprising:
Heterocyclic monomer just like following formula (I):
Wherein, R
1, R
2, R
3Be selected from the group that the functional group of following formula (I-a), formula (I-b), formula (I-c) and formula (I-d) is formed respectively:
Wherein, n is 〉=0 integer, and m is 〉=1 integer, X
1Be hydrogen base or methyl; And
Acryl monomer just like following formula (II):
Wherein, l is 〉=1 integer, this X
2Be hydrogen base or methyl.
The monomeric mixed weight of this heterocyclic monomer and acryl is than between 1: 2.5 and 1: 50.In addition, this LCD alignment composition also can have a sclerosis initiator.
The present invention also provides a kind of method of making liquid crystal indicator, it is characterized in that, comprises step:
A) provide two corresponding parallel substrates, and between these two substrates, form a liquid crystal accommodation space;
B) sealing one liquid crystal material and LCD alignment composition in this liquid crystal accommodation space, this LCD alignment composition comprise the heterocyclic monomer of formula (I) as described above and the acryl monomer of formula (II) as described above; And
C) with this LCD alignment composition polymerization on corresponding two surfaces that are positioned at this liquid crystal accommodation space of this substrate to form a liquid crystal alignment layer.
In another embodiment of the present invention, this method also has a step that applies a voltage to this liquid-crystal composition between step b) and step c), make this liquid crystal material, this heterocyclic monomer and this acryl monomer all deflect to a pre-determined direction, form vertical orientation through the step c) polymerization again, strengthen anchorage force (anchoring force).
Wherein, in step b), this liquid-crystal composition is that (One Drop Fill ODF) is sealed in this liquid crystal accommodation space with perfusion (Injection) or liquid crystal drop laxative remedy.And in step c), the polymerization single polymerization monomer shown in this heterocyclic monomer and this acryl monomer carries out polyreaction for the energy rayed, and this energy light is visible light or UV-light.
As known from the above, the method for LCD alignment composition of the present invention and manufacturing liquid crystal indicator is compared to the beneficial effect that prior art reaches:
One, in the present invention, this heterocyclic monomer has three functional groups, can promote the grappling ability, can improve panel luminance and contrast, reaches the reaction of quick liquid crystal vertical orientation.
Two, substrate needn't carry out LCD alignment earlier and handles and just to be used, and has significantly reduced must in advance the polyimide layer material be arranged at substrate and carry out the needed time of friction method.
Three, in addition, the present invention also avoids using the friction method may cause the problem of product fine rate decline.
Four, the present invention has also omitted the setting of polyimide layer, except saving needed machinery of processing or consumables cost, also effectively reduces the cost of manufacture of liquid crystal indicator.
Description of drawings
Fig. 1-1 is the work flow synoptic diagram of preferred embodiment of the method for manufacturing liquid crystal indicator of the present invention to Fig. 1-4.
The drawing reference numeral explanation
10a, 10b............. substrate
11a, 11b............. Polarizer
12a, 12b............. conductive layer
13............. liquid crystal accommodation space
20............. liquid crystal material
30............. liquid crystal alignment layer
31............. formula (I) heterocyclic monomer
32............. formula (II) acryl monomer
Embodiment
Relevant detailed description of the present invention and technology contents now are described as follows with regard to conjunction with figs.:
The invention discloses a kind of LCD alignment composition, comprise just like the heterocyclic monomer of following formula (I) and just like the acryl monomer of following formula (II);
The heterocyclic monomer of this formula (I):
Wherein, R
1, R
2, R
3Be selected from the group that the functional group of following formula (I-a), formula (I-b), formula (I-c) and formula (I-d) is formed respectively, this R
1, R
2, R
3Can be functional group identical, that phase XOR part is identical:
Wherein, n is 〉=0 integer, and m is 〉=1 integer, X
1Be hydrogen base or methyl; And
The acryl monomer of this formula (II):
Wherein, l is 〉=1 integer, this X
2Be hydrogen base or methyl.
The monomeric mixed weight of aforementioned formula (I) heterocyclic monomer and formula (II) acryl is than between 1: 2.5 and 1: 50.
This formula (I) heterocyclic monomer and formula (II) acryl monomer utilize the mutual polymerization of energy rayed to form a kind of LCD alignment polymkeric substance, and this energy light can be visible light or UV-light, this energy rayed intensity 〉=0.1mj/cm
2For quickening polyreaction, this formula (I) heterocyclic monomer and formula (II) acryl monomer carry out also can adding a sclerosis initiator before the polyreaction, especially a kind of ultraviolet light photopolymerization initiator or visible light sclerosis initiator.
In addition, the present invention also provides a kind of method of using foregoing liquid crystal orientation composition to make liquid crystal indicator, be widely used in the plurality of liquid crystals display unit, as MVA (Multi-domain Vertical Alignment), ASV (Advanced Super-V), PVA (Patterned Vertical Alignment), PSA wide viewing angle liquid crystal display devices such as (Polymer Stable Alignment).The method of this manufacturing liquid crystal indicator comprises step:
A) provide two corresponding parallel substrates, and between these two substrates, form a liquid crystal accommodation space;
B) sealing one liquid crystal material and LCD alignment composition be in this liquid crystal accommodation space, and this LCD alignment composition comprises the heterocyclic monomer of formula (I) as described above and the acryl monomer of formula (II) as described above; And
C) this LCD alignment composition of polymerization on corresponding two surfaces that are positioned at this liquid crystal accommodation space of this substrate to form a liquid crystal alignment layer.
See also Fig. 1-1 to shown in Fig. 1-4, be the preferred embodiment work flow synoptic diagram of the method for manufacturing liquid-crystal display of the present invention.
At first, as Figure 1-1, prepare two corresponding parallel substrate 10a, 10b, be separated by with a plurality of spherical particles or pillar stiffener (not shown) between this substrate 10a, the 10b, to form a liquid crystal accommodation space 13.Corresponding two surfaces that are positioned at this liquid crystal accommodation space 13 on this substrate 10a, the 10b are provided with conductive layer 12a, 12b and are electrically connected at the thin film transistor (not shown) respectively; The outside of this substrate 10a, 10b then is provided with Polarizer 11a, 11b.Moreover shown in Fig. 1-2, sealing one liquid-crystal compositions in the liquid crystal accommodation space between this substrate 10a, the 10b 13, this liquid-crystal composition comprise liquid crystal material 20 and suc as formula the heterocyclic monomer 31 of (I) and the acryl monomer 32 of formula (II).This liquid-crystal composition can perfusion (Injection) or the liquid crystal drop laxative remedy (One Drop Fill ODF) is sealed in this liquid crystal accommodation space 13.Wherein, this liquid crystal material 20 can be the vertical orientation liquid crystal material; The weight percent of 31 pairs of liquid crystal materials 20 of heterocyclic monomer of this formula (I) is 0.1% to 2% addition, and the weight percent of 32 pairs of liquid crystal materials 20 of acryl monomer of this formula (II) is 0.5% to 5% addition.
After the acryl monomer 32 of the heterocyclic monomer 31 of liquid crystal material 20, formula (I) and formula (II) is sealed in this liquid crystal accommodation space 13, can utilize this conductive layer 12a, 12b to impose voltage in this liquid-crystal composition, make the heterocyclic monomer 31 of this liquid crystal material 20, formula (I) and the acryl monomer 32 of formula (II) all deflect to a pre-determined direction, as Figure 1-3.At last, the acryl monomer 32 of the heterocyclic monomer 31 of this formula (I) and formula (II) is carried out polyreaction, be positioned at formation liquid crystal alignment layer 30 (shown in Fig. 1-4) on corresponding two surfaces of this liquid crystal accommodation space 13 at this substrate 10a, 10b.In the present invention, the heterocyclic monomer 31 of this formula (I) utilizes the mutual polymerization of energy rayed to form a kind of LCD alignment polymkeric substance with the acryl monomer 32 of formula (II), and this energy light is visible light or UV-light, this energy rayed intensity 〉=0.1mj/cm
2If desire shortens the polymerization reaction time of this formula (I) heterocyclic monomer 31 and formula (II) acryl monomer 32, before carrying out polyreaction, this formula (I) heterocyclic monomer 31 and formula (II) acryl monomer 32 also can add a sclerosis initiator (not shown) to promote polyreaction, this sclerosis initiator can be ultraviolet light photopolymerization initiator or visible light sclerosis initiator, and this sclerosis initiator is 0.01% to 1% addition to the weight percent of liquid crystal material 20.
In sum, the method for LCD alignment composition of the present invention and manufacturing liquid crystal indicator is compared to the beneficial effect that prior art reaches:
One, wherein heterocyclic monomer has three functional groups, and stronger anchorage force is provided, and to improve panel luminance and contrast, reaches the reaction of quick liquid crystal vertical orientation.
Two, compared to the technology of traditional liquid crystal indicator, the present invention is undertaken directly forming a liquid crystal alignment layer after the polyreaction on substrate by this formula (I) heterocyclic monomer and this formula (II) acryl monomer, make this liquid crystal material be reached the purpose of orientation, simplified in the past and must earlier substrate have been carried out the program that orientation is handled, except reduction is made liquid crystal indicator the needed time, also, saved high material cost because traditional polyimide alignment layer need be set.
Three, because of not using mechanicalness orientations such as friction method to handle, can not produce static and micronic dust, improve the good rate of product relatively.
Below the present invention is described in detail, only the above person only is a preferred embodiment of the present invention, when not limiting scope of the invention process.Be that all equalizations of doing according to the present patent application scope change and modify etc., all should still belong in the patent covering scope of the present invention.
Claims (18)
1. a LCD alignment composition is characterized in that, comprising:
Heterocyclic monomer just like following formula (I):
Wherein, R
1, R
2, R
3Be selected from the group that the functional group of following formula (I-a), formula (I-b), formula (I-c) and formula (I-d) is formed respectively:
Wherein, n is 〉=0 integer, and m is 〉=1 integer, X
1Be hydrogen base or methyl; And
Acryl monomer just like following formula (II):
Wherein, l is 〉=1 integer, X
2Be hydrogen base or methyl.
2. LCD alignment composition according to claim 1 is characterized in that, the monomeric mixed weight of described heterocyclic monomer and acryl is than between 1: 2.5 and 1: 50.
3. LCD alignment composition according to claim 1 is characterized in that, also comprises a sclerosis initiator.
4. according to claim 1 or 3 described LCD alignment compositions, it is characterized in that described heterocyclic monomer and acryl monomer utilize the energy rayed to carry out polyreaction.
5. LCD alignment composition according to claim 4 is characterized in that, described energy light is visible light or UV-light.
6. LCD alignment composition according to claim 4 is characterized in that, the exposure intensity 〉=0.1mj/cm of described energy light
2
7. a method of making liquid crystal indicator is characterized in that, comprises step:
Two corresponding parallel substrates (10a, 10b) are provided, and between described two substrates (10a, 10b), form a liquid crystal accommodation space (13);
Sealing one liquid crystal material (20) and a LCD alignment composition in described liquid crystal accommodation space (13), described LCD alignment composition comprises:
Heterocyclic monomer (31) just like following formula (I):
Wherein, R
1, R
2, R
3Be selected from the group that the functional group of following formula (I-a), formula (I-b), formula (I-c) and formula (I-d) is formed respectively:
Wherein, n is 〉=0 integer, and m is 〉=1 integer, X
1Be hydrogen base or methyl; And
Acryl monomer (32) just like following formula (II):
Wherein, l is 〉=1 integer, X
2Be hydrogen base or methyl; And
With the polymerization of described LCD alignment composition on corresponding two surfaces that are positioned at described liquid crystal accommodation space (13) of described substrate (10a, 10b) to form a liquid crystal alignment layer (30).
8. the method for manufacturing liquid crystal indicator according to claim 7 is characterized in that, also has a step that applies a voltage to described liquid-crystal composition.
9. the method for manufacturing liquid crystal indicator according to claim 7 is characterized in that, described liquid crystal material (20) and described LCD alignment composition are sealed in the described liquid crystal accommodation space (13) by perfusion.
10. the method for manufacturing liquid crystal indicator according to claim 7 is characterized in that, described liquid crystal material (20) and described LCD alignment composition are sealed in the described liquid crystal accommodation space (13) by the liquid crystal drop laxative remedy.
11. the method for manufacturing liquid crystal indicator according to claim 7 is characterized in that, described liquid crystal material (20) is the vertical orientation liquid crystal material.
12. the method for manufacturing liquid crystal indicator according to claim 7 is characterized in that, described heterocyclic monomer (31) is 0.1% to 2% addition to the weight percent of liquid crystal material (20).
13. the method for manufacturing liquid crystal indicator according to claim 7 is characterized in that, described acryl monomer is 0.5% to 5% addition to the weight percent of liquid crystal material (20).
14. the method for manufacturing liquid crystal indicator according to claim 7 is characterized in that, also adds a sclerosis initiator before the described LCD alignment composition of polymerization.
15. the method for manufacturing liquid crystal indicator according to claim 14 is characterized in that, described sclerosis initiator is 0.01% to 1% addition to the weight percent of liquid crystal material (20).
16. the method according to claim 7 or 14 described manufacturing liquid crystal indicators is characterized in that, described heterocyclic monomer (31) utilizes the energy rayed to carry out polyreaction with acryl monomer (32).
17. the method for manufacturing liquid crystal indicator according to claim 16 is characterized in that, described energy light is visible light or UV-light.
18. the method for manufacturing liquid crystal indicator according to claim 16 is characterized in that, the exposure intensity 〉=0.1mj/cm of described energy light
2
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| CN2010101521652A CN102220140A (en) | 2010-04-16 | 2010-04-16 | Liquid crystal alignment composition and method for manufacturing liquid crystal display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105137661A (en) * | 2015-10-09 | 2015-12-09 | 京东方科技集团股份有限公司 | Alignment film production method |
| JP6132123B1 (en) * | 2015-06-19 | 2017-05-24 | Dic株式会社 | Liquid crystal display element and manufacturing method thereof |
-
2010
- 2010-04-16 CN CN2010101521652A patent/CN102220140A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6132123B1 (en) * | 2015-06-19 | 2017-05-24 | Dic株式会社 | Liquid crystal display element and manufacturing method thereof |
| CN105137661A (en) * | 2015-10-09 | 2015-12-09 | 京东方科技集团股份有限公司 | Alignment film production method |
| CN105137661B (en) * | 2015-10-09 | 2018-03-27 | 京东方科技集团股份有限公司 | One kind orientation film manufacturing method |
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Application publication date: 20111019 |