CN1903826A - Monomer and method of manufacturing liquid crystal display panel using same - Google Patents
Monomer and method of manufacturing liquid crystal display panel using same Download PDFInfo
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- CN1903826A CN1903826A CN 200610110760 CN200610110760A CN1903826A CN 1903826 A CN1903826 A CN 1903826A CN 200610110760 CN200610110760 CN 200610110760 CN 200610110760 A CN200610110760 A CN 200610110760A CN 1903826 A CN1903826 A CN 1903826A
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Abstract
The present invention relates to a monomer. Said invention also provides its chemical structural formula. Besides, said invention also provides a method for making liquid crystal display panel by using said monomer.
Description
Technical field
The present invention relates to a kind of monomer and use the method that it makes display panels, and particularly relate to and a kind ofly can and use the method that it makes display panels with the easier blended monomer of liquid crystal molecule.
Background technology
In the epoch now that development in science and technology is maked rapid progress, display panels has been widely used in electronics and has shown on the product, as TV, computer screen, mobile computer, mobil phone or personal digital assistant etc.Especially using polymer stable alignment (polymer-stabilized alignment, PSA) many display fields orientation (multi-domain alignment) type display panels of being prepared from of technology, it has fast response time, wide viewing angle, high aperture, high to advantages such as processing procedure when are simple, is the technology that always is subjected to the suitable attention of industry.
In the middle of the PSA technology, in preparation display panel process, in the liquid crystal layer that inserts and puts between first, second substrate, add the reactive monomer (reactive monomer) of trace earlier, liquid crystal molecule is mixed with reactive monomer.Then, when applying voltage and UV rayed in first, second substrate, reactive monomer can with liquid crystal molecule generation phenomenon of phase separation, and reactive polymeric becomes polymkeric substance on the surface of first, second substrate.When polymkeric substance when liquid crystal layer is piled up at the interface of first, second substrate pile up because polymkeric substance with the interaction force of liquid crystal molecule between, makes polymkeric substance to arrange along the liquid crystal molecule direction.Therefore, liquid crystal molecule has tilt angle (pre-tile angle) on certain orientation.
Yet, because the traditional reactive monomer and the mutual solubility of liquid crystal molecule are not fine, when making liquid crystal molecule and reactive monomer on one of them substrate that drops in first, second substrate through the liquid crystal drop-method, reactive monomer all only can be distributed in the peripheral or surperficial of liquid crystal pearl.That is to say that reactive monomer is not to mix or be distributed in the liquid crystal layer with liquid crystal molecule very equably.Therefore, when the corresponding assembling of first, second substrate (assemble) pressing, cause reactive monomer different with the diffusion length of liquid crystal molecule.And reactive monomer is pushed to the border of liquid crystal pearl by liquid crystal molecule easily, and causing between the brilliant pearl of two dropping liquids has the reactive monomer of higher concentration to exist.So, tilt angle on the border of liquid crystal drop can increase greatly because of reactive monomer institute polymeric polymer concentration, and then cause display panels to produce white cancellate lattice imperfection (lattice mura), have a strong impact on the display quality of display panels.
Summary of the invention
Therefore, the purpose of this invention is to provide a kind of monomer and use the method that it makes display panels.Monomer whose can produce hydrogen bond with liquid crystal molecule or monomer whose can have close moment of dipole size with liquid crystal molecule, can be so that monomer and liquid crystal molecule mix more equably.Thus, can avoid display panels to produce, and promote the display quality of display panels widely because of monomer and the bad lattice imperfection problem that causes of liquid crystal molecule mutual solubility.
According to purpose of the present invention, the one side that is proposed provides a kind of monomer, represents with chemical formula [1]:
Wherein, R1 and R2 are the substituting groups that is selected from hydrogen, alkyl, aryl or aforesaid combination, and n is 0～5 integer, and A is selected from chemical formula [2], [3], [4], [5] or above-mentioned combination;
Wherein, X and Y are selected from hydroxyl (OH), methylol (CH
2OH), the substituting group of halogens or aforesaid combination, Z is the substituting group that is selected from hydrogen, halogens or aforesaid combination, T is selected from halogens.U, V and W are the substituting groups that is selected from hydroxyl, methylol, hydrogen or aforesaid combination, and among U, V and the W one is different with other two.
According to another object of the present invention, the manufacture method that provides a kind of display panels on the other hand that is proposed.At first, provide first substrate with first electrode and second substrate with second electrode.Then, folder is established liquid crystal layer between first substrate and second substrate, and liquid crystal layer is between first electrode and second electrode.Liquid crystal layer has a plurality of liquid crystal molecules and a plurality of monomer, and each monomer is represented with chemical formula [1]:
Wherein, R1 and R2 are the substituting groups that is selected from hydrogen, alkyl, aryl or aforesaid combination, and n is 0～5 integer, and A is selected from chemical formula [2], [3], [4], [5] or above-mentioned combination;
Wherein, X and Y are the substituting groups that is selected from hydroxyl, methylol, halogens or aforesaid combination, and Z is the substituting group that is selected from hydrogen, halogens or aforesaid combination, and T is selected from halogens.U, V and W are the substituting groups that is selected from hydroxyl, methylol, hydrogen or aforesaid combination, and among U, V and the W one is different with other two.
According to another purpose of the present invention, the another aspect that is proposed provides a kind of precursor, and it comprises as the described monomer of above-mentioned chemical formula [1].Monomer has and is essentially 0～5 debye (Debye, moment of dipole D).Wherein, 1 debye equals 3.33564 * 10
-30Coulomb * rice (C*m).
According to a further object of the present invention, the another aspect that is proposed provides a kind of precursor, and it comprises as the described monomer of above-mentioned chemical formula [1].Monomer has the moment of dipole that is essentially 0～3 debye.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, carry out following detailed description.
Description of drawings
Fig. 1 is the schema of demonstration according to the manufacture method of the display panels of the preferred embodiments of the present invention.
Fig. 2 A～2D is the processing procedure sectional view of demonstration according to the manufacture method of the display panels of the first embodiment of the present invention.
Fig. 3 A～3D is the processing procedure sectional view of demonstration according to the manufacture method of the display panels of the second embodiment of the present invention.
Fig. 4 is the synoptic diagram that shows the state when monomer according to the preferred embodiments of the present invention is with liquid crystal molecule generation hydrogen bond.
The primary clustering nomenclature
21: the first substrates
21a; First electrode
21b: first alignment film
22: the second substrates
22a: second electrode
22b: second alignment film
23: liquid crystal layer
23a: liquid crystal molecule
24: monomer
24a: polymer layer
25: UV-light
26a, 26b: display panels
30: hydrogen bond
V: voltage
Embodiment
The present invention is in order to solve the problem that traditional reactive monomer and liquid crystal molecule are difficult to mix, and proposes a kind of monomer that can produce hydrogen bond or have close moment of dipole (dipole moment) size with liquid crystal molecule with liquid crystal molecule especially.Thus, can avoid display panels to produce, and promote the display quality of display panels widely because of monomer and the bad lattice imperfection problem that causes of liquid crystal molecule mutual solubility.As for monomer of the present invention and use its method of making display panels and will illustrate as follows.
Please be simultaneously with reference to Fig. 1 and Fig. 2 A～2D, Fig. 1 is the schema of demonstration according to the manufacture method of the display panels of embodiments of the invention, Fig. 2 A～2D is the processing procedure sectional view of demonstration according to the manufacture method of the display panels of the first embodiment of the present invention.
At first, in step 11, shown in Fig. 2 A, provide first substrate 21 and second substrate, 22, the first substrates 21 and second substrate 22 to have the first electrode 21a and the second electrode 22a respectively.Then, enter in the step 12, and for example shown in Fig. 2 A, folder is established liquid crystal layer 23 between first substrate 21 and second substrate 22.In other words, liquid crystal layer 23 is between the first electrode 21a and the second electrode 22a.Wherein, liquid crystal layer 23 has a plurality of liquid crystal molecule 23a and a plurality of monomer 24.Each monomer 24 can be the sensing optical activity monomer, and its chemical structure is represented with chemical formula [1]:
In addition, R1 and R2 are the substituting groups that is selected from hydrogen, alkyl, aryl or aforesaid combination.For example, the selected substituting group of R1 and R2 can be identical or different, and can be all the substituting group of hydrogen, methyl, phenyl or aforesaid combination.N can be 0～5 integer.For example, n can be 0～3 integer.A can be intercalated nucleus (hard core) and is selected from chemical formula [2], [3], [4], [5] or above-mentioned combination;
That is to say that the chemical structure of monomer 24 also can be shown in chemical formula [6], [7], [8] or [9], and illustrate as follows.
In addition, X and Y are selected from hydroxyl (OH), methylol (CH
2OH), the substituting group of halogens or aforesaid combination.For example, X and Y can be fluorine.
Moreover Z is the substituting group that can be selected from hydrogen, halogens or aforesaid combination, and T can be selected from halogen atom.For example, the selected substituting group of Z and T can be identical or different, and can be all fluorine.In addition, U, V and W are the substituting groups that is selected from hydroxyl, methylol, hydrogen or aforesaid combination, and two the selected substituting groups of a selected substituting group and other among U, V and the W are different.In other words, the selection mode of U, V and W can comprise that U is the substituting group that is selected from hydroxyl, methylol or aforesaid combination, and V and W comprise hydrogen; Perhaps, V is the substituting group that is selected from hydroxyl, methylol or aforesaid combination, and U and W comprise hydrogen; Perhaps, W is the substituting group that is selected from hydroxyl, methylol or aforesaid combination, and U and V comprise hydrogen.
Then, enter in the step 13, shown in Fig. 2 B, apply voltage V between the first electrode 21a and the second electrode 22a, liquid crystal molecule 23a is rotated, and allow liquid crystal molecule 23a and monomer 24 mix more.Wherein, also can increase the disturbance of liquid crystal molecule 23a and monomer 24, but can not cause monomer 24 to produce complete polymerization, and make monomer 24 formation polymer layers by one of them mode of thermal source heating and light source irradiation.Change bag and talk about, one of them mode of thermal source that is applied and light source irradiation can make monomer produce the prepolymerization effect or can not make monomer 24 produce complete polymerization.Certainly, need to prove this moment,, also can apply the voltage gradation if the voltage V size that applied can't allow liquid crystal molecule 23a rotate when smooth.For example, apply voltage for the first time earlier, then, apply voltage for the second time again, and for the first time voltage and the position of voltage for the second time accurate (accurate position, potential) identical or different, but the accurate summation in voltage and the position of voltage for the second time is that the position of former voltage V when applying a time is accurate for the first time.Or, apply voltage for the first time earlier, then, apply voltage for the second time again, and voltage is accurate identical or different with the position of voltage for the second time for the first time, but the accurate summation in voltage and the position of voltage for the second time is accurate greater than the position of former voltage V when applying a time for the first time.Moreover, must it should be noted that apply that one of them step of voltage or heating and irradiation can be carried out simultaneously or different time under carry out in regular turn.For example, one of them of present embodiment described execution earlier heating and irradiation then, applies voltage again.Perhaps, apply voltage earlier, then, carry out one of them of heating and irradiation again.Or, one of them of heating and irradiation and apply voltage and carry out simultaneously.In addition, the second electrode 22a can divide into several zones again, and the voltage that each zone applied can be identical or different, and the voltage that is applied comprises direct current, alternating-current or above-mentioned combination.Wherein, the first electrode 21a and the second electrode 22a for example are respectively common electrode and pixel electrode.
Then, enter in the step 14, shown in Fig. 2 C, these monomers 24 of polymerization when applying this voltage V.That is to say, apply voltage V during, carry out the polymerization of these monomers 24.For example, based on monomer 24 is the sensing optical activity monomer, can be outside second substrate, 21 upper surfaces, can cause monomer 24 polymeric light source irradiation liquid crystal layers 23 with UV-light 25 or other, make these monomers 24 become polymer layer 24a, in order to use as the alignment film on first substrate 21 and second substrate 22 at the surface aggregate of the first electrode 21a and the second electrode 22a.Must it should be noted that, in the time can causing monomer 24 polymeric light source irradiation liquid crystal layers 23 with UV-light 25 or other, can full illumination or subregion irradiating liquid crystal layer 23.And when subregion irradiating liquid crystal layer 23, the irradiation energy in each district can be identical or inequality, and the energy summation during subregion irradiating liquid crystal layer 23 can the energy when full illumination liquid crystal layer 23 identical or inequality.Must it should be noted that the voltage V that step 13 and step 14 applied also can be identical or inequality, according to arrangement situation or other requirement of liquid crystal molecule 23a.
Then, enter in the step 15, shown in Fig. 2 D, remove this voltage V, and remove UV-light 25 subsequently or be removed together simultaneously, display panels 26a finishes.At this moment, polymer layer 24a helps liquid crystal molecule 23a and topples over toward at least one specific direction in order to the tilt angle of liquid crystal molecule 23a with respect to the surface tilt of the first electrode 21a and the second electrode 22a (pre-tilt angle) to be provided.Generally speaking, tilt angle is less than 90 degree, preferably less than 60 degree.Therefore, based on foregoing, the disclosed monomer 24 of present embodiment can be applicable to that (polymer-stabilized alignment, PSA) technology prepares in the process of display panels with polymer-stabilized alignment.
Please refer to Fig. 3 A～3D, it is the processing procedure sectional view of demonstration according to the manufacture method of the display panels of the second embodiment of the present invention.Refer again to Fig. 1, at first, in step 11, as shown in Figure 3A, provide first substrate 21 and second substrate, 22, the first substrates 21 and second substrate 22 to have the first electrode 21a and the second electrode 22a respectively.Wherein, have the first alignment film 21b and the second alignment film 22b on the surface of the first electrode 21a and the second electrode 22a respectively.Then, enter in the step 12, again as shown in Figure 3A, folder is established liquid crystal layer 23 between first substrate 21 and second substrate 22, and liquid crystal layer 23 is between the first electrode 21a and the second electrode 22a.That is to say that liquid crystal layer 23 is between the first alignment film 21b and the second alignment film 22b.Wherein, liquid crystal layer 23 has a plurality of liquid crystal molecule 23a and a plurality of monomer 24, the first alignment film 21b and second alignment film 22b usefulness so that liquid crystal molecule 23a tilts or arrangement toward a specific direction.Each monomer 24 can be the sensing optical activity monomer, and its chemical structure is represented with chemical formula [1].
Then, enter in the step 13, shown in Fig. 3 B, apply voltage V between the first electrode 21a and the second electrode 22a, liquid crystal molecule 23a is rotated, and allow liquid crystal molecule 23a and monomer 24 mix more.Wherein, also can increase the disturbance of liquid crystal molecule 23a and monomer 24, but can not cause monomer 24 to produce complete polymerization, and make monomer 24 formation polymer layers by one of them mode of thermal source heating and light source irradiation.In other words, one of them mode of thermal source that is applied and light source irradiation can make monomer produce the prepolymerization effect or can not make monomer 24 produce complete polymerization.Certainly, need to prove this moment,, also can apply the voltage gradation if the voltage V size that applied can't allow liquid crystal molecule 23a rotate when smooth.For example, apply voltage for the first time earlier, then, apply voltage for the second time again, and voltage is accurate identical or different with the position of voltage for the second time for the first time, but the accurate summation in voltage and the position of voltage for the second time is that the position of former voltage V when applying a time is accurate for the first time.Or, apply voltage for the first time earlier, then, apply voltage for the second time again, and voltage is accurate identical or different with the position of voltage for the second time for the first time, but the accurate summation in voltage and the position of voltage for the second time is accurate greater than the position of former voltage V when applying a time for the first time.Moreover, must it should be noted that apply that one of them step of voltage or heating and irradiation can be carried out simultaneously or different time under carry out in regular turn.For example, one of them of present embodiment described execution earlier heating and irradiation then, applies voltage again.Perhaps, apply voltage earlier, then, carry out one of them of heating and irradiation again.Or, one of them of heating and irradiation and apply voltage and carry out simultaneously, and the voltage that is applied comprises direct current, alternating-current or above-mentioned combination.In addition, the second electrode 22a can divide into several zones again, and the voltage that each zone was applied in can be identical or different.Wherein, the first electrode 21a and the second electrode 22a for example are respectively common electrode and pixel electrode.
Then, enter in the step 14, shown in Fig. 3 C, these monomers 24 of polymerization when applying this voltage V.That is to say, apply voltage V during, carry out the polymerization of these monomers 24.For example, based on monomer 24 is the sensing optical activity monomer, can outside the upper surface of second substrate 21, can cause monomer 24 polymeric light source irradiation liquid crystal layers 23, make these monomers 24 become polymer layer 24a at the surface aggregate of the first alignment film 21b and the second alignment film 22b with UV-light 25 or other.Must it should be noted that, can cause the monomer 24 polymeric light source irradiation liquid crystal layers 23 can full illumination or subregion irradiating liquid crystal layer 23 with UV-light 25 or other.And when subregion irradiating liquid crystal layer 23, the irradiation energy in each district can be identical or inequality, and the energy summation during subregion irradiating liquid crystal layer 23 can the energy when full illumination liquid crystal layer 23 identical or inequality.Must it should be noted that the voltage V that step 13 and step 14 applied also can be identical or inequality, according to arrangement situation or other requirement of liquid crystal molecule 23a.
Then, enter in the step 15, shown in Fig. 3 D, remove this voltage V, and remove UV-light 25 subsequently or be removed together simultaneously, display panels 26b finishes.At this moment, polymer layer 24a helps liquid crystal molecule 23a and topples over toward at least one specific direction in order to liquid crystal molecule 23a to be provided the tilt angle with respect to the surface tilt of the first electrode 21a and the second electrode 22a.Because, before forming polymer layer 24a, the specific direction of the existing first alignment film 21b and the second alignment film 22b, so, when forming polymer layer 24a, can make that the pre-dumping direction of liquid crystal molecule is more remarkable.
How to be located between first substrate 21 and second substrate 22 as for the liquid crystal layer in the foregoing description 23, to be simply described as follows at this.Establish liquid crystal layer 23 before between first substrate 21 and second substrate 22 at folder, need that the non-display area (not shown) of a substrate be coated with upper ledge glue in first substrate 21 and second substrate 22.Then, folder is established liquid crystal layer 23 between first substrate 21 and second substrate 22 again.At this moment, press from both sides the method for establishing liquid crystal layer 23 following several mode is arranged.
In first kind of mode, at first, corresponding assembling first substrate 21 and second substrate 22.Wherein, the frame glue between first substrate 21 and second substrate 22 has liquid crystal injection opening (not shown).Then, the liquid crystal that sees through frame glue injects opening, injects between liquid crystal layer 23 to first substrates 21 and second substrate 22.This kind elder generation assembling two substrates then injects the mode of liquid crystal layer between two substrates and is referred to as liquid crystal injection method (liquid crystal injection method).
In the second way, at first, the non-display area (not shown) of a substrate in first substrate 21 and second substrate 22 is coated with upper ledge glue.Then, splash on the surface of the substrate of liquid crystal layer 23 in first substrate 21 with frame glue and second substrate 22, promptly splash into liquid crystal layer 23 in substrate upper ledge glue institute area surrounded.Then, corresponding assembling first substrate 21 and second substrate 22, establish liquid crystal layer 23 between first substrate 21 and second substrate 22 with folder, this kind splash into earlier liquid crystal layer on a substrate, then assemble the mode of two substrates be referred to as the liquid crystal drop-method (one drop fill method, ODF).
Please refer to Fig. 4, it is the synoptic diagram that shows the state when monomer according to embodiments of the invention is with liquid crystal molecule generation hydrogen bond.As shown in Figure 4, liquid crystal molecule 23a can be negative type liquid crystal molecule or eurymeric liquid crystal molecule.Be preferably the negative type liquid crystal molecule, then liquid crystal molecule 23a for example has fluorine (F) on the direction of molecule minor axis.One of the X of monomer 24, Y and U, V and W are the substituting groups that is selected from hydroxyl, methylol or aforesaid combination, and for example the V of chemical formula [9] is selected from hydroxyl, and V and W are selected from hydrogen.When liquid crystal molecule 23a mixes with monomer 24, because the fluorine of liquid crystal molecule 23a is a hydrogen bond receptor, and the hydroxyl on the intercalated nucleus of monomer 24 is a hydrogen bond donor, the reactive force of liquid crystal molecule 23a and monomer 24 hydrogen bond 30 that can utilize between fluorine and the hydroxyl to be produced and make that mutual solubility each other can be better then, that is to say that liquid crystal molecule 23a and monomer 24 blended are more even.And, can be so that liquid crystal molecule 23a be the same with the translational speed and the velocity of diffusion of monomer 24 on the first electrode 21a and the second electrode 22a, shown in Fig. 2 A～2B.Perhaps, make that liquid crystal molecule 23a is the same with the translational speed and the velocity of diffusion of monomer 24 on the first vertical orientation film 21b and the second vertical orientation film 22b, and for example shown in Fig. 3 A～3B.In the present embodiment, at least one of X and Y and Z and T can be selected from halogens, makes the structural similitude of monomer 24 and liquid crystal molecule 23a, and the big or small direction of molecular dipole moment (dipole moment) is also similar.In addition, monomer 24 itself also has the mesomorphic phase with liquid crystal molecule 23a identical type, for example is the reactive liquid crystalline molecule of minus, is similar to the approximate thing (mimicker) of liquid crystal molecule 23a.Therefore, by the structure of similar rerum natura and voltinism, can help the mutual solubility of liquid crystal molecule 23a and monomer 24 to improve.
As for the measurement of the moment of dipole of monomer 24, experimentize and write down the result shown in following three tables according to chemical formula [6], [7] and [8].Wherein, need to prove that the moment of dipole of monomer 24 is on its molecule minor axis, and the unit of moment of dipole is that (Debye, D), and 1 debye equals 3.33564 * 10 in the debye
-30Coulomb * rice (C*m).
With chemical formula [6], the measurement of its moment of dipole is as shown in table 1:
Table 1
| X | n | R1，R2 | Moment of dipole (D) |
| | 0 | Hydrogen | 0.93 |
| Methyl | 1.13 | ||
| Phenyl | 1.25 | ||
| 3 | Hydrogen | 2.09 | |
| Methyl | 1.64 | ||
| Phenyl | 1.45 |
With chemical formula [7], the measurement of its moment of dipole is as shown in table 2:
Table 2
| Y | n | R1，R2 | Moment of dipole (D) |
| | 0 | Hydrogen | 1.50 |
| Methyl | 1.93 | ||
| Phenyl | 1.99 | ||
| 3 | Hydrogen | 2.82 | |
| Methyl | 2.28 | ||
| Phenyl | 2.13 |
With chemical formula [8], the measurement of its moment of dipole is as shown in table 3:
Table 3
| T | Z | n | R1，R2 | Moment of dipole (D) | |
| | Hydrogen | 0 | Hydrogen | 2.97 | |
| Methyl | 2.46 | ||||
| Phenyl | 2.02 | ||||
| Fluorine | 3 | Hydrogen | 4.61 | ||
| Methyl | 3.01 | ||||
| Phenyl | 2.92 |
Size for the moment of dipole of monomer 24 need be controlled between about 0～about 5.0, preferably between about 0～about 3.0.This is because the moment of dipole of liquid crystal molecule 23a probably also is about about 3.0, therefore can increase the mutual solubility of liquid crystal molecule 23a and monomer 24.In addition, the moment of dipole of monomer 24 should not be too big or too small, in order to avoid influence the orientation to liquid crystal molecule 23a of the electric field that produced when being applied in voltage V between the first electrode 21a and the second electrode 22a.
So the monomer 24 of present embodiment is the importing by halogens (for example being fluorine) on intercalated nucleus, can be so that the structure of monomer 24 has bigger dipole moment to produce in the part of its molecule minor axis, as 0～5.0.Thus, in the electric field that is produced when applying voltage V between the first electrode 21a and the second electrode 22a, monomer 24 has consistence with direction of motion and the velocity of diffusion of liquid crystal molecule 23a.In addition, the moment of dipole interphase interaction (dipole-dipoleinteraction) between monomer 24 and the liquid crystal molecule 23a can make its two mutual solubility increase.
The intercalated nucleus kind has absolute influence to the quality that whole application PSA technology prepares many display fields orientation (Multi-domainalignment) type display panels, so present embodiment has designed three kinds of different intercalated nucleus especially for A, for example be similar structures such as benzene, naphthalene and biphenyl.If when present embodiment was done the intercalated nucleus similar structures with benzene, the desirable number of benzene was to be 2～3 in its chemical formula [2].If when present embodiment was done the intercalated nucleus similar structures with naphthalene or biphenyl, the desirable number of naphthalene or biphenyl was to be 1 in its chemical formula [3], [4] and [5].The number of intercalated nucleus is too much unsuitable, in order to avoid cause polymkeric substance 24a excessive to the orientation power of liquid crystal molecule, and then influence the orientation of liquid crystal molecule 23a.
Moreover R1 and R2 are the substituting groups that can be hydrogen, methyl or aforesaid combination, and the soft end functional group that is connected in the intercalated nucleus two ends of monomer 24 is can be by (CH
2)
n, methacrylic ester (methylacrylate), acrylate or similar soft end functional group form.The n value is controlled between 0～5, preferably between 0～3.(CH
2)
nThe adjustment of carbochain length can regulate and control the mutual solubility of monomer 24 and liquid crystal molecule 23a, but (CH
2)
nCarbochain unsuitable oversize, in order to avoid impact polymer 24a is for the orientation power of liquid crystal molecule 23a.In addition, monomer 24 can absorb one of them of luminous energy and heat energy and aggregate into polymer layer 24a apace by methacrylic ester or this type of functional group of acrylate, makes liquid crystal molecule 23a have tilt angle.Therefore, monomer 24 can aggregate into polymer layer 24a by the condensation polymerization effect of soft end functional group (functional groups such as methacrylic ester or acrylate are for example arranged) each other.
Moreover, must it should be noted that, to aggregate into the monomer of polymer layer 24a sometimes, still need other polymerization stabilizer or promotor, then comprise these materials person, then be referred to as precursor (precursor).Certainly, precursor also can only comprise more than one the described monomer of the foregoing description or monomer more than two kinds, so that the polymeric polymer layer 24a of institute can provide preferred tilt angle.Certainly, the moment of dipole that monomer had that precursor comprised also need be controlled between about 0～about 5.0 as the size of the described moment of dipole of above-mentioned embodiment, preferably between about 0～about 3.0.
In addition, must it should be noted that, in the above embodiment of the present invention, the disclosed second electrode 22a for the pre-dumping direction that helps liquid crystal molecule 23a or orientation can be more variation, arrange (multi-domain alignment) to form many display fields, so one of them of the second electrode 22a and the first electrode 21a can have a plurality of opening (not shown), form polygonal shape with one of them that causes the second electrode 22a and the first electrode 21a.And shape that these openings form, for example: pectination, branch-like, X-shaped, W shape, V-arrangement or similarly shape or above-mentioned combination.If when the employed material of the second electrode 22a was transparent material, display panels was called the penetrating type display panels.If when the employed material of the second electrode 22a was the reflection material, display panels was called the reflective liquid crystal display panel.If when the employed material of the second electrode 22a was transparent material and mixing use of reflection material or subregion use, display panels was called semi-penetrate through and semi-reflection-type liquid crystal display board.And transparent material comprises indium-zinc oxide, aluminium tin-oxide, indium tin oxide or similarly material or above-mentioned combination.The reflection material comprises the alloy of the nitride of gold and silver, copper, aluminium, titanium, tantalum, molybdenum, neodymium, tungsten, above-mentioned metal, above-mentioned metal or above-mentioned combination.
The disclosed monomer of the above embodiment of the present invention and use the method that it makes display panels, monomer whose can produce hydrogen bond with liquid crystal molecule or monomer whose can have close moment of dipole size with liquid crystal molecule, can be so that monomer and liquid crystal molecule mix more equably.Thus, can avoid display panels to produce, and promote the display quality of display panels widely because of monomer and the bad lattice imperfection problem that causes of liquid crystal molecule mutual solubility.
In sum, though the present invention with embodiment openly as above, it is not in order to limit the present invention.The technician of the technical field of the invention without departing from the spirit and scope of the present invention, can carry out various changes and retouching.Therefore, protection scope of the present invention is with being as the criterion that claims limit.
Claims (20)
1. monomer, represent with chemical formula [1]:
Wherein, R1 and R2 are the substituting groups that is selected from hydrogen, alkyl, aryl or aforesaid combination, and n is 0～5 integer, and A is selected from chemical formula [2], [3], [4], [5] or above-mentioned combination;
Wherein, X and Y are selected from hydroxyl (OH), methylol (CH
2OH), the substituting group of halogens or aforesaid combination, Z is the substituting group that is selected from hydrogen, halogens or aforesaid combination, T is selected from halogens, and U, V and W are the substituting groups that is selected from hydroxyl, methylol, hydrogen or aforesaid combination, and among U, V and the W one is different with other two.
2. the described monomer of claim 1, wherein X, Y, T and Z comprise fluorine.
3. the described monomer of claim 1, wherein R1 and R2 are the substituting groups that is selected from methyl, phenyl or aforesaid combination.
4. the described monomer of claim 1, wherein the selected substituting group of T and Z is identical or different.
5. the described monomer of claim 1, wherein the selected substituting group of R1 and R2 is identical or different.
6. the described monomer of claim 1, wherein the value of n is 0～3.
7. a precursor comprises the described monomer of claim 1, and this monomer has square and is essentially 0～5 debye (Debye, moment of dipole D).
8.. a precursor comprise the described monomer of claim 1, and this monomer has the moment of dipole that is essentially 0～3 debye.
9. the manufacture method of a display panels comprises:
First substrate with first electrode and second substrate with second electrode are provided; And
Folder is established liquid crystal layer between this first substrate and this second substrate, and this liquid crystal layer is between this first electrode and this second electrode, and this liquid crystal layer has a plurality of liquid crystal molecules and a plurality of monomer, and respectively this monomer is represented with chemical formula [1]:
Wherein, R1 and R2 are the substituting groups that is selected from hydrogen, alkyl, aryl or aforesaid combination, and n is 0～5 integer, and A is selected from chemical formula [2], [3], [4], [5] or above-mentioned combination;
Wherein, X and Y are the substituting groups that is selected from hydroxyl, methylol, halogens or aforesaid combination, Z is the substituting group that is selected from hydrogen, halogens or aforesaid combination, T is selected from halogens, U, V and W are the substituting groups that is selected from hydroxyl, methylol, hydrogen or aforesaid combination, and among U, V and the W one is different with other two.
10. the described method of claim 9 also comprises:
Apply a voltage between this first electrode and this second electrode.
11. the described method of claim 10 also comprises:
These monomers of polymerization when applying this voltage.
12. the described method of claim 11 also comprises:
Remove this voltage.
13. the described method of claim 9, wherein X, Y, T and Z comprise fluorine.
14. the described method of claim 9, wherein R1 and R2 are the substituting groups that is selected from methyl, phenyl, aforesaid combination.
15. the described method of claim 9, wherein the selected substituting group of T and Z is identical or different.
16. the described method of claim 9, wherein the selected substituting group of R1 and R2 is identical or different.
17. the described method of claim 9, wherein the value of n is 0～3.
18. the described method of claim 9 also comprises:
On the surface of this first electrode and this second electrode, form first alignment film and second alignment film respectively.
19. the described method of claim 9 also comprises:
Apply this liquid crystal layer of UV-irradiation, make these monomer polymerizations become polymer layer, and respectively the surface of this liquid crystal molecule and this polymer layer has tilt angle.
20. the described method of claim 9 also comprises:
Apply one of light source and thermal source in this liquid crystal layer, make these liquid crystal molecule disturbances.
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Cited By (6)
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| US8089584B2 (en) | 2009-03-17 | 2012-01-03 | Au Optronics Corp. | Liquid crystal display panel and method for fabricating the same |
| WO2015053233A1 (en) * | 2013-10-07 | 2015-04-16 | 日産化学工業株式会社 | Liquid-crystal display element and method for manufacturing liquid-crystal display element |
| WO2015053232A1 (en) * | 2013-10-07 | 2015-04-16 | 日産化学工業株式会社 | Liquid-crystal alignment agent, liquid-crystal alignment film, and liquid-crystal display element |
| 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 |
| CN107922839A (en) * | 2015-07-31 | 2018-04-17 | 默克专利股份有限公司 | Liquid crystal media and liquid crystal display |
| CN110780490A (en) * | 2019-04-29 | 2020-02-11 | 友达光电股份有限公司 | Display device |
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| 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 |
| US8089584B2 (en) | 2009-03-17 | 2012-01-03 | Au Optronics Corp. | Liquid crystal display panel and method for fabricating the same |
| WO2015053233A1 (en) * | 2013-10-07 | 2015-04-16 | 日産化学工業株式会社 | Liquid-crystal display element and method for manufacturing liquid-crystal display element |
| WO2015053232A1 (en) * | 2013-10-07 | 2015-04-16 | 日産化学工業株式会社 | Liquid-crystal alignment agent, liquid-crystal alignment film, and liquid-crystal display element |
| JPWO2015053233A1 (en) * | 2013-10-07 | 2017-03-09 | 日産化学工業株式会社 | Liquid crystal display element and method for manufacturing liquid crystal display element |
| JPWO2015053232A1 (en) * | 2013-10-07 | 2017-03-09 | 日産化学工業株式会社 | Liquid crystal alignment agent, liquid crystal alignment film, and liquid crystal display element |
| TWI650601B (en) * | 2013-10-07 | 2019-02-11 | 日產化學工業股份有限公司 | Liquid crystal display element and method of manufacturing liquid crystal display element |
| CN107922839A (en) * | 2015-07-31 | 2018-04-17 | 默克专利股份有限公司 | Liquid crystal media and liquid crystal display |
| CN110780490A (en) * | 2019-04-29 | 2020-02-11 | 友达光电股份有限公司 | Display device |
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