TW201036991A - Polymer liquid crystal alignment polymer and method for manufacturing liquid crystal display applying the same - Google Patents

Abstract

The invention provides a polymer liquid crystal alignment polymer and a method for manufacturing a liquid crystal display applying the same. The polymer liquid crystal alignment polymer is formed by mutually reacting a first polymerizing monomer and a second polymerizing monomer. The polymer liquid crystal alignment polymer is formed on the corresponding parallel surfaces of two transparent substrates of the liquid crystal display so that liquid crystal molecules between the transparent substrates are aligned. Comparing with an alignment layer must be firstly disposed on the transparent substrate of a conventional liquid crystal display, the invention can effectively simplify the production process and reduce the cost required for the traditional alignment layer.

Description

201036991 VI. Description of the Invention: [Technical Field] The present invention relates to a liquid crystal alignment polymer and a method for manufacturing a liquid crystal display device, and more particularly to a polymer liquid crystal alignment polymer applied to a liquid crystal display and using the same A method of producing a liquid crystal display device from a polymer liquid crystal alignment polymer. [Prior Art] The liquid crystal alignment technology is one of the key technologies for determining the picture quality of a liquid crystal display device. Only a stable and uniform initial arrangement of liquid crystal materials in the liquid crystal display panel can present a high quality picture. Generally, a liquid crystal display device has a thin layer for inducing alignment of liquid crystal ® molecules, which is called liquid crystal alignment layer. In the industrial process, the rubbing method is often used to make the liquid crystal molecules uniformly arranged. The mechanical alignment of the liquid crystal alignment layer, such as a uniformly moving plush cloth, causes the parallel alignment of the micro-grooves on the liquid crystal alignment film. , the orientation of the liquid crystal molecules can be achieved. The liquid crystal alignment layer materials currently used in liquid crystal display devices include polystyrene, polyamidiamine, polyvinyl alcohol, polyester, epoxy resin, polyurethane, polydecane, and the like. Among them, the most common and commonly used is polyimide. Since the molecule of polyimine has an extremely high rigidity and strong intermolecular force due to its imide, it has excellent homogeneity and durability. Sex, so it is suitable for use with the friction process. The use of the mechanical friction method has the advantages of low cost, stable process, good alignment uniformity, and easy control of the pretilt angle, and is widely used in the manufacture of liquid crystal panels. In the conventional process of manufacturing a liquid crystal display device, the substrate on the liquid crystal display device is first subjected to liquid crystal alignment processing. After the substrate is cleaned, the surface of the substrate is treated with a liquid crystal alignment layer material, and finally the county method is used. Complete the liquid crystal alignment process. After the liquid crystal alignment treatment, the substrate ’ can be further assembled, _, liquid crystal injection, and the like. That is to say, the substrate on the display device can have the alignment capability, and it needs to be processed by the complicated method of 201036991, which takes considerable time and processing cost. Further, when the liquid crystal alignment layer is processed by the rubbing method, static electricity and fine dust are generated, and the thin crystal transistor is destroyed or contamination is caused, and the quality of the liquid crystal display device is lowered. A multi-vertical alignment type liquid crystal display device (Multi_domain) has been developed

Vertically Aligned Liquid Crystal Display (MVA-LCD) is a combination of a negatively-induced anisotropic liquid crystal and a vertical alignment layer to achieve vertical alignment. Such a liquid crystal display device has excellent contrast and a wide viewing angle, and its alignment layer can be processed without being subjected to the aforementioned rubbing method, and is simpler in manufacturing, and is widely accepted by the industry. However, 'the liquid crystal display device still needs to be provided with an alignment layer of a polyimine or the like'. In addition to the inability to reduce the complexity of the manufacturing process, the high price of polyimine makes the cost of manufacturing such a liquid crystal display device ineffective. . SUMMARY OF THE INVENTION The main object of the present invention is to reduce the manufacturing process of a liquid crystal display device and to reduce the cost of fabrication. In order to achieve the above object, the present invention provides a polymer liquid crystal alignment polymer obtained by polymerizing a polymerization monomer and a second polymerization monomer with each other, wherein the first polymerization monomer may be the following formula (I). a compound of formula (H), formula (m) or formula (IV):

Wherein 'A is an alkyl or a functional alkyl group, γ is selected from the group consisting of a hydroxyl group, an alkyl group, an ammonium group, and a hydrogen group, and X is as in the formula (1) or (2) Functional group: 201036991

CD

Hf (2)

OL is a thio or alkoxy group of C21 ' Ri is a hydrogen group or a methyl group; the second polymerizable monomer may be selected from the group consisting of formula (V) to formula (VIII): P 2 2 ^ ~ c~ C— 〇-[ ch2]- B (V) h2c =c— ch2— of ch7|- bo r2 h2c =4-cf 〇-ch2— ch2]- 0- B (VII)II 〇(VI) o h2c CH2 -f 0- ch2- ch2]- b (VIII) wherein o is an integer of 21, R 2 is a methyl or hydrogen group, and B is selected from the group consisting of a hydroxyl group, a decyl group, and a hydrogen group. group. In addition, the present invention further provides a method for manufacturing a liquid crystal display device by using the polymer liquid crystal alignment polymer, comprising the steps of: ❿ a) providing two corresponding parallel transparent substrates, and forming a liquid crystal accommodating space between the two transparent substrates b) sealing the liquid crystal material and the first polymerizable monomer and the second polymerizable monomer in the liquid crystal accommodating space; c) polymerizing the first polymerizable monomer and the second polymerizable monomer, corresponding to the transparent substrate . A polymer liquid crystal alignment polymer is formed on the surface of the liquid crystal accommodating space. In another embodiment of the present invention, the method has a step of applying a voltage between the step b) and the step e) to deflect the liquid crystal material and the first polymerization monomer dimer monomer to In the direction, the first polymerization monomer is polymerized through step c) and the first polymerization precursor of the 201036991 forms a vertical alignment to enhance the anchoring force. Wherein the liquid crystal composition in step b) is sealed in the liquid crystal accommodating space by an infusion method or a drop drop (ODF). In the step 〇, the polymerization system of the formula 1 and the formula (II) is subjected to polymerization by ultraviolet light irradiation. In the present invention, the first polymerization monomer and the second polymerization single system are polymerized by energy irradiation, and the energy light is visible light or ultraviolet light. The first polymerized monomer and the second polymerized monomer are subjected to a polymerization reaction in a weight ratio of between 1:2.5 and 1:50. In order to increase the efficiency of the polymerization reaction, a curing initiator may be added before the polymerization of the first polymerization monomer and the second polymerization monomer; the weight percentage of the curing initiator to the liquid crystal material is 0.01% to 1 % added amount. f) The polymer liquid crystal alignment polymer of the present invention and a method for producing a liquid crystal display device using the polymer liquid crystal alignment polymer, thereby simplifying the manufacturing process of the liquid crystal display device. Compared with the manufacturing method of the conventional liquid crystal display, it is not necessary to apply the alignment layer on the substrate first, and it is not necessary to perform the rubbing process on the ruthenium alignment layer, thereby reducing the time required for manufacturing and the material cost of the alignment layer, such as polytheneamine. In addition, the present invention can also avoid the problem that the use of the friction method may cause a decrease in the yield of the product. [Embodiment] The detailed description and technical contents of the present invention will now be described as follows: The present invention is a polymer liquid crystal alignment polymer in which a first polymerizable monomer and a second polymerizable monomer are polymerized with each other. The reaction is obtained, wherein the first polymerizable monomer may be a compound of the following formula 1, formula (II), formula (III) or formula (IV):

6 201036991 wherein Α is an alkyl or haloalkyl group of C21, such as (III) HI JL· "1 • c LI n or 1 H ch3 1 3 1 -c- | ch3. Ο an equivalent functional group, h is 21 Odd; otherwise, A may be a hydroxyl group, an alkyl group, an ammonium group or a hydrogen group; and further, Y may be a C1 to C6 linear or branched alkyl group; and X is Is a functional group such as formula (1) or formula (2):

Ri (I) '—C-0~L II 0 (2) L is an alkyl or alkoxy group of C21, and 1 is a hydrogen group or a fluorenyl group; more precisely, the L may be

CH 2 or CH.-h 0- π functional group, m, η is an integer m of 21 In the present invention, the second polymerizable monomer may be selected from the group consisting of formula (V) to formula (VIII): I r ! Γ H2c —C—C— of CH2j- B (V) H2c =C— CH2 〇- CH,

B (VI) H2C =C —C—· 0 — CH^— CH?·]— 0 — 6 (Vll) H2c =c— 0— CH2— CH2]- B (VHI) 7 201036991 Its +, 〇 is An integer of d, R2 is a methyl group or a hydrogen group, and B is selected from the group consisting of a hydroxyl group, a methyl group, and a hydrogen group. And the second polymerization monomer and the second polymerization monomer are subjected to a polymerization reaction at a weight ratio of 1:25 to 1:50. The first polymerization monomer and the second polymerization single system are subjected to polymerization by monthly light irradiation to form a polymer liquid crystal alignment polymer, and the energy light may be visible light or ultraviolet light. In order to accelerate the polymerization, a human-hardening initiator may be added before the polymerization of the first polymerization monomer and the second polymerization monomer, which is an ultraviolet light curing initiator or a visible light curing initiator. The present invention provides a method for manufacturing a liquid crystal display device by using a molecular liquid crystal alignment polymer, comprising the steps of: a) providing two corresponding parallel transparent substrates, and forming a liquid crystal accommodating space between the two transparent substrates; b) sealing a liquid crystal material and the first polymerizable monomer and the second polymerizable monomer in the liquid crystal accommodating space; c) polymerizing the first polymerizable monomer and the second polymerizable monomer in the transparent substrate phase A polymer liquid crystal alignment polymer is formed on the surface corresponding to the shai liquid crystal space. Referring to FIG. 1-1 to FIG. 1-4, a schematic diagram of a processing flow of a preferred embodiment of the method for manufacturing a liquid crystal display device of the present invention is shown. As shown in FIG. M, first, two corresponding transparent substrates 10a and 10b are disposed in parallel, and the plurality of spherical particles or support columns (not shown) are separated between the substrates 10a and 10b to form a plurality of transparent substrates 10a and 10b. A liquid crystal housing space 12. The opposite surfaces of the transparent substrate 10a, 10b located in the liquid crystal accommodating space 12 are respectively provided with at least one electrode 11a, lib electrically connected to the thin film transistor (not shown). The transparent substrate 10a, 10b may be a transparent material such as glass, quartz or soft plastic (such as PET). The liquid day and day display device applied by the month t» of the present invention includes MVA (Multi-domain Vertical Alignment), AS V (Advanced Super-V) > PVA (Pattemed Vertical 201036991)

A wide viewing angle liquid crystal display device such as Alignment) or PSA (P〇lymer stable Alignment). Further, as shown in FIG. 1-2, a liquid crystal material 20 and the first polymerizable monomer 31 and the second polymerized single body are sealed in the liquid crystal accommodating space 12 between the transparent substrates 10a and 10b. 32 in the liquid crystal accommodating space 12; wherein the liquid crystal material 20 can be a vertical alignment liquid crystal material, the liquid crystal material 20, and the first and second polymerizable monomers 31, 32 can be infused (injection) or liquid crystal drop The method of sealing the Dropne Drop Fill (ODF) in the liquid crystal accommodating space 12 is in the present invention, and whether the electrode 11a, lib is driven by the thin film transistor to apply a voltage to the transparent substrate 10a, 10b. When a voltage is applied, the liquid crystal material 20 and the first and second polymerizable monomers 31, 32 can be correspondingly deflected to a predetermined direction according to the voltage direction, as shown in FIG. 1-3, reaching a multi-directional line. The purpose of the arrangement. In this way, the vertical alignment capability of the liquid crystal display can be increased. If no voltage is applied to the transparent plates l〇a, l〇b, and the liquid crystal display produced by the liquid crystal pre-alignment method, the improvement of the contrast ability is not obvious. Finally, a step of polymerizing the first polymerization monomer 31 and the second polymerization monomer 32 is carried out. In the present invention, the first polymerization monomer 31 and the second polymerization monomer 32 are irradiated with the energy light 40 to form a transparent substrate i〇a, i〇b corresponding to the surface of the liquid crystal accommodating space 12 The polymer liquid crystal alignment polymer 30 is as shown in "Fig. 1-4". The energy light 40 used to carry out the polymerization reaction is visible or ultraviolet light. If the polymerization time of the first polymerization precursor 31 and the first polymerization precursor 32 is shortened, in step b), a curing initiator (not shown) may be further sealed to the liquid crystal capacitor. The space 12 is provided to promote the polymerization efficiency of the first polymerizable monomer 31 and the second polymerizable monomer 32; the weight percentage of the hardening initiator to the liquid crystal material 20 is 0.01% to 1%, and the hardening The initiator can be an ultraviolet light curing initiator or a visible light curing initiator. In summary, the polymer liquid crystal alignment polymer of the present invention and the method for manufacturing a liquid crystal display device using the polymer liquid crystal alignment polymer are compared with the process of the conventional liquid crystal display device, by the first polymerization monomer and the second After the polymerization monomer is polymerized, a polymer liquid crystal alignment polymer is formed directly on the substrate of the 201020101, so that the crystallographic material can achieve the alignment. Simplify the process of applying the alignment layer to the plate on the plate in the past, in addition to reducing the time required for the chemical liquid to read, and because there is no need to set expensive liquid crystal alignment layer materials (such as poly-branched amine). Save on high material costs. Further, since the present invention does not require the use of a mechanical alignment treatment such as a rubbing method, static electricity and fine dust are not generated, and the yield of the product is relatively improved. Therefore, the present invention is highly progressive and conforms to the requirements of the invention patent application, and the application is filed in accordance with the law. The invention has been described in detail above, but the foregoing is only a preferred embodiment of the invention, and is not intended to limit the scope of the invention. That is, the equivalent changes and modifications made by the scope of the present application should remain within the scope of the patent of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1-4 is a schematic view showing a processing flow of a preferred embodiment of a method for manufacturing a liquid crystal display device of the present invention. [Main component symbol description] 10a, 10b. 11a ' lib · 12 ·-. -20 · . ·. 30 · ·.. 31 ·-.. 32·..· 40 · . ··..Transparent Substrate • · · ·Electrode ··••Liquid accommodating space... Liquid crystal material• ···South molecular liquid crystal alignment polymer....first polymerization monomer....second polymerization monomer•·••Energy light

Claims (1)

201036991 VII. Patent application scope: 1. A polymer liquid crystal alignment polymer obtained by polymerizing a first polymerization monomer and a second polymerization monomer with each other, wherein The first polymerizable monomer may be selected from the group consisting of formula (I) to formula (IV): (IV) wherein A is an alkyl or a dentate alkyl group of C21, and Y is selected from the group consisting of a hydroxyl group, an alkyl group, an ammonium group, and a hydrogen group, and X is as in formula (1) or Functional group of formula (2): (1) H^ = C-L (2) L is an alkyl or alkoxy group of C21, which is a hydrogen group or a mercapto group; the second polymerizable monomer may be selected from the group consisting of formula (V) to formula (VIII): H2C=CC-〇-{cH2|-B (V) H2c =C- CH2- Of CH,f- B (VI) II Λ ' j H2c 0- CH plant CH2]~ Ο— B (VII) H2C =c — ch2~^ o— ch2— CH2: — B (VIII) o where o is an integer of gl, R 2 is a decyl or hydrogen group, and B is selected from an oxy group, a methyl group, and a hydrogen group. The group consisting of. 11 201036991 2. The polymer liquid crystal alignment polymer according to claim 1, wherein ch3 - ο ι is a CH3 functional group. 3. The polymer liquid crystal alignment polymer according to item 1 of the patent application, wherein: 1 1 1 -C-1" — — • C - The A system is an F or Η functional group, and the h system is an odd number of 21. 4. The polymer liquid crystal alignment polymer according to claim 1, wherein the Y system is a C1 to C6 alkyl group. 5. The polymer liquid crystal alignment polymer according to claim 1, wherein the L system is a number 0 CH+ or a book (3) hepta(7) functional group, and the tn'η system is a whole 6 as in the patent application scope. The polymer liquid crystal alignment polymer, wherein the first polymerized fluorene monomer and the second polymerizable monomer are polymerized in a weight ratio of between 1:2.5 and 1:50. The polymer liquid crystal alignment polymer according to claim 1, wherein the first polymerization monomer and the second polymerization monomer are further subjected to a curing initiator before being polymerized. The polymer liquid crystal alignment polymer according to claim 1 or 7, wherein the first polymerization monomer and the second polymerization unit system are subjected to polymerization by energy light irradiation. 9. The polymer liquid crystal alignment polymer according to claim 8, wherein the energy light system 12 201036991 is visible light or ultraviolet light. 10. A method for manufacturing a liquid crystal display device using the polymer liquid crystal alignment polymer according to claim 1, comprising the steps of: providing two corresponding parallel transparent substrates, and forming a liquid crystal capacitance between the two transparent substrates a space for sealing a liquid crystal material, a first polymerizable monomer, and a second polymerizable monomer in the liquid crystal accommodating space, wherein the first polymerizable monomer may be selected from the group consisting of Formula 1 to Formula (IV) Group: Wherein A is an alkyl group or a haloalkyl group of C21, and Y is selected from the group consisting of a hydroxyl group, an alkyl group, an ammonium group, and a hydrogen group, and X is a formula (1) or a formula (2). Functional group: Ri Ri 11 11 H^C=C—L (1) 〇_(_ (2) L is a Cg 1 alkyl or alkoxy group, R! is a hydrogen group or a fluorenyl group; The body may be selected from the group consisting of formula (V) to formula (Yin): H2C =C-CH2~[ O-CH2-CH2f- B (VIII) 13 201036991 wherein 0 is an integer of 21, R 2 is a methyl or hydrogen group, and B is selected from a hydroxyl group, a decyl group, and a group consisting of hydrogen groups; and polymerizing the first polymerizable monomer and the second polymerizable monomer to form a polymer liquid crystal alignment polymer on a surface of the transparent substrate corresponding to the liquid crystal accommodating space. 11. The method of manufacturing a liquid crystal display device according to claim 10, further comprising the step of applying a voltage. 12. The method of manufacturing a liquid crystal display device according to claim 10, wherein the liquid crystal composition is sealed in the liquid crystal accommodating space by a potting method. 13. The method of manufacturing a liquid crystal display device according to claim 10, wherein the liquid crystal composition is sealed in the liquid crystal accommodating space by a liquid crystal dropping method. 14. The method of producing a liquid crystal display device according to claim 10, wherein the lanthanide is an m 3 functional group. 15. The method of manufacturing a liquid crystal display device according to claim 10, wherein F Η I I — C — — C — I h I h wherein the A system is an F or H functional group, and h is an odd number. 16. The method of manufacturing a liquid crystal display device according to claim 10, wherein the L system is an η-ten chy-o- or L n"r functional group, and the m and η are integers of 21 . The method of producing a liquid crystal display device according to the first aspect of the invention, wherein the γ is a C1-C6 alkyl group. 18. The method of manufacturing a liquid crystal display device according to claim 10, wherein the first polymerizable monomer and the second polymerizable monomer are carried out in a weight ratio of between 1:2.5 and 1:50. Polymerization. 19. The method of producing a liquid crystal display device according to claim 1, wherein the first polymerization monomer and the second polymerization monomer are further subjected to a curing initiator before the polymerization reaction. A method of producing a liquid crystal display device according to the invention of claim 15 wherein the weight percentage of the hardening initiator to the liquid crystal material is 〇1% to 1% by weight. The method of manufacturing a liquid crystal display device according to claim 1, wherein the first polymerization monomer and the second polymerization single system are subjected to polymerization by energy light irradiation. The method of manufacturing a liquid crystal display device according to claim 21, wherein the energy light system is visible light or ultraviolet light. The method of manufacturing a liquid crystal display device according to claim 10, wherein the liquid crystal material is a vertical alignment liquid crystal material. 15