Self-oriented material, self-oriented liquid crystal material and manufacturing method of liquid crystal panel

Abstract

The invention provides a self-oriented material, a self-oriented liquid crystal material and a manufacturing method of the liquid crystal panel. The self-oriented material provided by the invention can be used for carrying out alignment on liquid crystal molecules, and a polyimide alignment layer is not required to be arranged in the liquid crystal panel when the self-oriented material is added into the liquid crystal material. The self-oriented liquid crystal material disclosed by the invention contains the self-oriented material, the self-oriented material can be used for carrying out alignment on liquid crystal molecules, therefore a polyimide alignment layer is not required to be arranged in the liquid crystal panel. According to the manufacturing method of the liquid crystal panel, the orientation of the liquid crystal molecules is realized by utilizing the self-oriented material in the self-oriented liquid crystal material, and the polyimide alignment layer does not need to be manufactured, so that the process for manufacturing the polyimide alignment layer is saved, and the production cost is reduced.

Claims

1. A self-oriented material, comprising one or more of a compound conforming to the general formula (I): ##STR00014## a part except sixteen R groups in the general formula is defined as a dendritic structure body; wherein the sixteen R groups are selected from one or two of the following general formula (II) and the general formula (III): ##STR00015## the plural ##STR00016## in the structural general formula (II) and the general formula (III) are aromatic rings or cycloalkanes; SP1 and SP2 are chemical bonds, (CH.sub.2).sub.n or (CH.sub.2).sub.nO; n is an integer from 1 to 6 in the (CH.sub.2).sub.n or (CH.sub.2).sub.nO, wherein one or more of the (CH.sub.2) can be replaced with O, S, CO, COO, OCO, OCOO, OCH.sub.2, CH.sub.2O, CHCH, CFCF, or CC; P is an alkyl group with 3 8 C atoms connected with a polymerizable group at the tail end, wherein one or more CH.sub.2 of the alkyl groups can be substituted with O, CONH, COO, OCO, CO, or CHCH group, one or more H atoms in the alkyl group can be replaced by F or CL atoms; X is a substituted group selected from F, Cl, Br, CH.sub.3, CN, and an alkyl group with two to eight C atoms; one or more non-adjacent CH.sub.2 in the alkyl group can be replaced by O or S; m is the number of the substituent groups X connected to the same; ##STR00017## m is an integer from zero to four; R is a hydrogen atom or an alkyl or alkenyl group having one to eight C atoms, wherein the alkyl group and the alkenyl group are in a straight chain shape; R selected from the structural general formula (II) or the structural general formula (III) is connected with the dendritic structure main body in the general formula (I) through the tail end of the P group.

2. The self-oriented material according to claim 1, wherein the aromatic ring comprises a benzene ring, and the SP1 and the SP2 are the same or different; wherein the polymerizable group at the tail end of the P group comprises one of a methacrylate group, an acrylic ester group, a vinyl group and an ethyleneoxy group.

3. The self-oriented material according to claim 1, wherein sixteen R groups of the general formula (I) are selected from one or more of the following structural formulas: ##STR00018##

4. A self-oriented liquid crystal material, comprising a liquid crystal material and the self-oriented material as claimed in claim 1, wherein the liquid crystal material comprises liquid crystal molecules.

5. The self-oriented liquid crystal material according to claim 4, wherein the mass percent of the self-oriented material in the self-oriented liquid crystal material is 0.1%-2%.

6. A manufacturing method of the liquid crystal panel comprising the following steps: providing a first substrate, a second substrate and the self-oriented liquid crystal material as claimed in claim 4; dripping or ink-jet printing the self-oriented liquid crystal material on the first substrate or the second substrate, and attaching the first base plate and the second base plate to each other in a aligned manner; the self-oriented liquid crystal material between the first substrate and the second substrate forming a liquid crystal layer, the self-oriented material in the liquid crystal layer being adsorbed on the surface of the first substrate and the surface of the second substrate by virtue of the dendritic structure body, and the self-oriented material being perpendicular to the surface of the first substrate and the surface of the second substrate, so that the liquid crystal molecules being guided to be perpendicular to the first substrate and the second substrate; applying voltage to the two sides of the liquid crystal layer, so that the liquid crystal molecules being deflected, carrying out ultraviolet irradiation on the liquid crystal layer while voltage being applied, the self-oriented material being subjected to polymerization reaction, forming a first polymer layer and a second polymer layer on the surface of the first substrate and the surface of the second substrate respectively; removing the voltage on the two sides of the liquid crystal layer, and under the action of the first polymer layer and the second polymer layer, the liquid crystal molecules in the liquid crystal layer generating a pre-inclination angle.

7. The manufacturing method of the liquid crystal panel according to claim 6, wherein a first electrode is arranged on the first substrate, and a second electrode is arranged on the second substrate; when the first substrate is in alignment fit with the second substrate, the first electrode is arranged towards the second substrate, and the second electrode is arranged towards the first substrate; voltage is formed between the first electrode and the second electrode, and therefore voltage is applied to the two sides of the liquid crystal layer.

8. The manufacturing method of the liquid crystal panel according to claim 6, further comprising steps of coating frame glue and curing frame glue; and the step of coating frame glue occurs before the alignment of the first substrate and the second substrate is carried out, wherein the step of coating frame glue comprises: coating a frame glue on the periphery of the second substrate or the first substrate corresponding to the self-oriented liquid crystal material; the step of curing the frame glue occurs before the voltage is applied to the two sides of the liquid crystal layer, wherein the step of curing the frame glue comprises at least one of UV curing and thermal curing.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The specific embodiments of the present invention are described in detail with reference to the accompanying drawings, which clearly shows the technical scheme of the invention and other beneficial effects are obvious.

(2) In the drawings:

(3) FIG. 1 is a flow chart of a manufacturing method of a liquid crystal panel according to the present invention;

(4) FIG. 2 is a schematic diagram of a step S2 of a manufacturing method of a liquid crystal panel according to the invention;

(5) FIG. 3 is a schematic diagram of a step S3 of a manufacturing method of a liquid crystal panel according to the invention;

(6) FIG. 4 is a schematic diagram of a step S4 of a method for manufacturing a liquid crystal panel according to the present invention and a structure diagram of the liquid crystal panel according to the present invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

(7) In order to further expel the technical means adopted by the present invention and the effect thereof, the present invention is described in detail with reference to preferred embodiments of the present invention and the accompanying drawings.

(8) Referring to FIG. 2, a self-oriented material 42 is provided, which includes one or more of compounds conforming to the following structural general formula (I):

(9) ##STR00006##

(10) The part except sixteen R groups in the structural general formula is defined as a dendritic structure body.

(11) The sixteen R groups are selected from one or two of the structural following general formula (II) and the general formula (III):

(12) ##STR00007##

(13) In the structural general formula (II) and the structural general formula (III),

(14) ##STR00008##
are aromatic rings or cycloalkanes.

(15) Specifically, the aromatic ring includes a benzene ring.

(16) SP1 and SP2 are chemical bonds (CH.sub.2).sub.n or (CH.sub.2).sub.nOn is an integer from 1 to 6 in the (CH.sub.2).sub.n or (CH.sub.2).sub.nO, wherein one or more of the (CH.sub.2) can be replaced with O, S, CO, COO, OCOO, OCOO, OCH.sub.2, CH.sub.2O, CHCH, CFCF, or CC.

(17) Specifically, the SP1 and the SP2 can be the same or different.

(18) P is an alkyl group with 3 8 C atoms connected with a polymerizable group at the tail end. The alkyl group is in a straight chain shape or a branched chain shape. One or more CH.sub.2 of the alkyl groups can be substituted with O, CONH, COO, OCO, CO, or CHCH group. One or more H atoms in the alkyl group can be replaced by F or CL atoms.

(19) Specifically, the polymerizable group at the tail end of the P group includes one of the methacrylate group, the acrylic ester group, the vinyl group and the ethyleneoxy group.

(20) X is a substituted group selected from F, Cl, Br, CH.sub.3, CN, and an alkyl group with two to eight C atoms. The alkyl group is in a straight chain shape or a branched chain shape. One or more non-adjacent CH.sub.2 in the alkyl group can be replaced by O or S. The m is the number of the substituent groups X connected to the same

(21) ##STR00009##
and m is an integer from zero to four.

(22) Specifically, when in is greater than 1, m substituent groups x can be the same or different.

(23) R is a hydrogen atom or an alkyl or alkenyl group having one to eight C atoms, and the alkyl group and the alkenyl group are in a straight chain shape.

(24) R selected from the structural general formula (III) or the structural general formula (III) is connected with the dendritic structure main body in the general formula (I) through the tail end of the P group.

(25) Specifically, the nitrogen (N) in the dendritic structure body of the self-oriented material 42 can form the hydrogen bond or intermolecular force between the atoms and the electrode layer on the surface of the substrate. The self-oriented material 42 is thus anchored to its surface. The plural nitrogen atoms are contained in the dendritic structure main body, so that a relatively strong interaction force can be formed with the surface of the substrate. Therefore, the self-oriented material 42 is firmly anchored on the surface of the substrate, and the alignment effect of the liquid crystal molecules is improved.

(26) Specifically, in the structural general formula (II) and the structural general formula (III), the p group is a polymerizable group, and can be mutually polymerized under ultraviolet light irradiation, which lead to the self-oriented material 42 be cross-linked to form a polymer. The R group is a flexible tail chain, and the group

(27) ##STR00010##
which is located between the P group and the R group is a rigid group. In the alignment process of the liquid crystal molecules 41, the R group with flexible tail chain and the rigid group connected with the R group of the flexible tail chain are used for guiding the arrangement of the liquid crystal molecules 41.

(28) Preferably, sixteen R groups in the structure general formula are selected from one or more of the following structural formulas,

(29) ##STR00011##

(30) The self-oriented material 42 can be used for aligning the liquid crystal molecules 41, and when the self-oriented material 42 is added into the liquid crystal material, the polyimide alignment layer is not required to he arranged in a liquid crystal panel. Therefore, the process for manufacturing the polyimide alignment layer can be saved, the production cost is reduced, and the alignment effect of the liquid crystal molecules 41 is better.

(31) Based on the self-oriented material 42, the present invention further provides a self-oriented liquid crystal material including a liquid crystal material and the self-oriented material 42. The liquid crystal material includes liquid crystal molecules 41.

(32) Specifically, the mass percent of the self-oriented material 42 in the self-oriented liquid crystal material is 0.1%-2%, preferably 0.4% or 1%.

(33) Specifically, in the self-oriented liquid crystal material, the liquid crystal material and the self-oriented material 42 are uniformly mixed so as to ensure that when the self-oriented liquid crystal material is irradiated by ultraviolet light, the self-oriented material 42 is polymerized to form a thin film with a uniform thickness in the process of manufacturing the liquid crystal panel.

(34) The self-oriented liquid crystal material contains the self-oriented material 42. The self-oriented material 42 can be used for carrying out alignment on the liquid crystal molecules 41, so that the polyimide alignment layer does not need to he arranged in the liquid crystal panel. The process for manufacturing the polyimide alignment layer is saved, the production cost is reduced, and the alignment effect of the liquid crystal molecules 41 is better.

(35) Please refer to FIG. 1, based on the self-oriented liquid crystal material, the present invention further provides a manufacturing method of the liquid crystal panel. The manufacturing method includes the following steps.

(36) In step S1, referring to FIG. 2, a first substrate 10, a second substrate 20 and the self-oriented liquid crystal material are provided.

(37) Specifically, a first electrode 31 is arranged on the first substrate 10, and a second electrode 32 is arranged on the second substrate 20.

(38) Specifically, the first substrate 10 and the second the substrate 20 is the color film substrate and the thin film transistor array substrate respectively. The first electrode 31 and the second electrode 32 are respectively the common electrode and the pixel electrode.

(39) In step S2, please referring to FIG. 2, dripping or ink-jet printing (inkjet) the self-oriented liquid crystal material on the first substrate 10 or the second substrate 20 is used for aligning and laminating the first substrate 10 and the second substrate 20. The self-oriented liquid crystal material between the first substrate 10 and the second substrate 20 forms a liquid crystal layer 40. The self-oriented material 42 in the liquid crystal layer 40 is adsorbed on the surface of the first substrate 10 and the surface of the second substrate 20 through the dendritic structure body, and the self-oriented material 42 is perpendicular to the surface of the first substrate 10 and the surface of the second substrate 20, so that the liquid crystal molecules 41 are guided to be perpendicular to the first substrate 10 and the second substrate 20.

(40) Preferably, a vacuum lamination process (VAS) is adopted for aligning the first substrate 10 with the second substrate 20.

(41) Specifically, when the first substrate 10 and the second substrate 20 are aligned, the first electrode 31 is arranged towards the second substrate 20, and the second electrode 32 faces the first substrate 10.

(42) Specifically, the one drop filling (ODF) process is adopted. The self-oriented liquid crystal material is dripped on the first substrate 10 or the second substrate 20.

(43) In step S3, referring to FIG. 3, voltages are applied to the two sides of the liquid crystal layer 40. After the liquid crystal molecules 41 are deflected, ultraviolet irradiation is carried out on the liquid crystal layer 40 while voltage is applied. The self-oriented material 42 has a polymerization reaction, and the first polymer layer 51 and the second polymer layer 52 are formed on the surfaces of the first substrate 10 and the second substrate 20 respectively.

(44) Specifically, voltage is formed between the first electrode 31 and the second electrode 32, so that voltage is applied to the two sides of the liquid crystal layer 40.

(45) Specifically, the liquid crystal material in the self-oriented liquid crystal material is uniformly mixed with the self-oriented material 42, so that the thickness of the film layer of the first polymer layer 51 and the thickness of the second polymer layer 52 formed by polymerizing the self-oriented material 42 is uniform.

(46) In step S4, referring to FIG. 4, voltages on the two sides of the liquid crystal layer 40 are removed. Under the action of the first polymer layer 51 and the second polymer layer 52, the liquid crystal molecules 41 in the liquid crystal layer 40 generate a pre-inclination angle.

(47) Specifically, a plurality of protrusions (not shown) are arranged on the surfaces of the first polymer layer 51 and the second polymer layer 52, which are capable of maintaining the pre-inclination angle of the liquid crystal molecule 41 in the form of the space stereo banner.

(48) Specifically, the manufacturing method of the liquid crystal panel further includes the steps of coating the frame glue 60 and curing the frame glue 60, The step of coating the frame glue 60 occurs before the alignment of the first substrate 10 and the second substrate 20. The step of coating frame glue 60 includes: coating the frame glue 60 on the second substrate 20 or the first substrate 10 corresponding to the periphery of the self-oriented liquid crystal material. The step of curing the frame glue 60 occurs before the voltage is applied to the two sides of the liquid crystal layer 40. The step of curing the frame glue 60 includes at least one of UV curing and thermal curing.

(49) In a preferred embodiment of the self-oriented liquid crystal material, the liquid crystal material is a negative liquid crystal material, wherein the Tni is 74 C., the n is 0.0980 (25 C. and 589 nm), and is 3.1 (25 C., and 1 kHz), Tni is a clear point temperature of the liquid crystal material, the n is the optical anisotropy of the liquid crystal material, and the is the dielectric anisotropy of the liquid crystal material. The mass percent of the self-oriented material 42 in the self-oriented liquid crystal material is 1%. R groups in the structural general formula (I) of the self-oriented material 42 are

(50) ##STR00012##

(51) When the liquid crystal panel is manufactured by adopting the self-oriented liquid crystal material of the embodiment, the voltage applied to the two sides of the liquid crystal layer 40 is 13 v, and the frequency of the alternating current voltage is 4 Hz.

(52) In another preferred embodiment of the self-oriented liquid crystal material of the present invention, the mass percent of the self-oriented material 42 in the self-oriented liquid crystal material is 0.4%. R groups in the structural general formula (I) of the self-oriented material 42 are

(53) ##STR00013##

(54) According to the manufacturing method of the liquid crystal panel, the orientation of the liquid crystal molecules 41 is realized by utilizing the self-oriented material 42 in the self-oriented liquid crystal material, and the polyimide alignment layer does not need to be manufactured. So that a process for manufacturing the polyimide alignment layer is saved, the production cost is reduced, and the alignment effect of the liquid crystal molecules 41 is better.

(55) Referring to FIG. 4, the invention further provides a liquid crystal panel based on the manufacturing method of the liquid crystal panel, which includes a first substrate 10 and a second substrate 20 which are oppositely arranged, the first polymer layer 51 arranged on one side facing the second substrate 20 of the first substrate 10, the second polymer layer 52 arranged on one side facing the first substrate 10 of the second substrate 20, and the liquid crystal layer 40 arranged between the first polymer layer 51 and the second polymer layer 52. The liquid crystal layer 40 includes a liquid crystal material, and the liquid crystal material includes liquid crystal molecules 41, wherein the liquid crystal molecule 41 is provided with a pre-inclination angle.

(56) The first polymer layer 51 and the second polymer layer 52 are fanned by polymerizing the self-oriented material 42.

(57) Specifically, the liquid crystal panel further includes the frame 60, which is located between the first substrate 10 and the second substrate 20 and located on the periphery of the liquid crystal layer 40. The first electrode 31 is arranged between the first substrate 10 and the first polymer layer 51, and the second electrode 32 is arranged between the second substrate 20 and the second polymer layer 52

(58) Specifically, the first substrate 10 and the second the substrate 20 are the color film substrate and the thin film transistor array substrate respectively. The first electrode 31 and the second electrode 32 are respectively a common electrode and a pixel electrode.

(59) The liquid crystal panel realizes the alignment of the liquid crystal molecules 41 by utilizing the self-oriented material 42, and the polyimide alignment layer does not need to be arranged. The production cost is low, and the alignment effect of the liquid crystal molecules 41 is better.

(60) In conclusion, the self-oriented material provided by the invention can be used for carrying out alignment on liquid crystal molecules. The self-oriented material is added into the liquid crystal material, and the polyimide alignment layer is not required to be arranged in the liquid crystal panel. The self-oriented liquid crystal material disclosed by the invention contains the self-oriented material, and the self-oriented material can be used for carrying out alignment on liquid crystal molecules. Therefore, the polyimide alignment layer is not required to be arranged in the liquid crystal panel. According to the manufacturing method of the liquid crystal panel in the present invention, the orientation of the liquid crystal molecules is realized by utilizing the self-oriented material in the self-oriented liquid crystal material, and the polyimide alignment layer does not need to be manufactured. So that a process for manufacturing the polyimide alignment layer is saved. The production cost is reduced, and the alignment effect of the liquid crystal molecules is better.

(61) For the ordinary technical personnel in the field, other various corresponding changes and modifications can be made according to the technical scheme and technical ideas of the invention. All such changes and modifications shall fall within the protection scope of the claims of the present invention.