LIQUID CRYSTAL MATERIAL AND LIQUID CRYSTAL DISPLAY PANEL

Abstract

A liquid crystal material and a liquid crystal display panel are provided. The liquid crystal material includes liquid crystal molecules, a polymerizable monomer, and an auxiliary alignment agent. A structural formula of the auxiliary alignment agent comprises at least one A group, at least one Sp group, at least one Z group, at least one R group, and at least one L group.

Claims

1. A liquid crystal material, comprising: liquid crystal molecules, a polymerizable monomer, and an auxiliary alignment agent; wherein a structural formula of the auxiliary alignment agent comprises at least one A group, at least one Sp group, at least one Z group, at least one R group, and at least one L group; wherein the A group is a composition comprising at least one oxygen atom, at least one nitrogen atom, or at least one oxygen atom and at least one nitrogen atom, wherein the A group is one composition selected from the group consisting of: ##STR00039## and any combination thereof; wherein the Sp group is a (CH.sub.2).sub.n group, or a substituted group thereof obtained by substituting one or more CH.sub.2 groups in the (CH.sub.2).sub.n group with one or more groups selected from O, S, CO, COO, OCO, OCOO, OCH.sub.2, CH.sub.2O, CHCH, CFCF, CC, CHCHCOO or OCOCHCH, and n is an integer between 1 and 8; wherein the Z group is one composition selected from: ##STR00040## and any combination thereof, and the ##STR00041## is a phenyl group, a substituted group thereof obtained by substituting one or more hydrogen atoms on the phenyl group with F, Cl, Br, I, CN, NO.sub.2 or C(O)H, or a cycloalkyl group; wherein the R group is a straight or branched first alkyl group containing 5 to 20 carbon atoms, a first group obtained by substituting one CH.sub.2 group in the first alkyl group with phenyl, cycloalkyl, CONN, COO, OCO, S, CO or CHCH, a second group obtained by substituting one of hydrogen atoms in the first alkyl group with an iron atom or a chlorine atom, or a third group obtained by substituting one of hydrogen atoms in the first group with an iron atom or a chlorine atom; and wherein the L group is a polymerizable group attached to the Z group, the L group is one or more than one of compositions selected from: ##STR00042## and any combination thereof.

2. The liquid crystal material according to claim 1, wherein the auxiliary alignment agent comprises one A group, two Sp groups, one Z group, one R group, and one L group, and the structural formula of the auxiliary alignment agent is: ##STR00043##

3. The liquid crystal material according to claim 1, wherein the structural formula of the auxiliary alignment agent is represented by one of formulas selected from: ##STR00044## ##STR00045## ##STR00046##

4. The liquid crystal material according to claim 1, wherein the polymerizable monomer includes one selected from the group consisting of an acrylate, an acrylate derivative, a methacrylate, a methacrylate derivative, styrene, a styrene derivative, an epoxy resin, and any combination thereof.

5. A liquid crystal display panel, comprising: an array substrate, a color filter substrate disposed opposite to the array substrate, and a liquid crystal material disposed between the array substrate and the color filter substrate; wherein the liquid crystal material comprises liquid crystal molecules, a polymerizable monomer, and an auxiliary alignment agent; wherein a structural formula of the auxiliary alignment agent comprises at least one A group, at least one Sp group, at least one Z group, at least one R group, and at least one L group; wherein the A group is a composition comprising at least one oxygen atom, at least one nitrogen atom, or at least one oxygen atom and at least one nitrogen atom; wherein the Sp group is a (CH.sub.2).sub.n group, or a substituted group thereof obtained by substituting one or more CH.sub.2 groups in the (CH.sub.2).sub.n group with one or more groups selected from O, S, CO, COO, OCO, OCOO, OCH.sub.2, CH.sub.2O, CHCH, CFCF, CC, CHCHCOO or OCOCHCH, and n is an integer between 1 and 8; wherein the Z group is one composition selected from: ##STR00047## and any combination thereof, and the ##STR00048## is a phenyl group, a substituted group thereof obtained by substituting one or more hydrogen atoms on the phenyl group with F, Cl, Br, I, CN, NO.sub.2 or C(O)H, or a cycloalkyl group; wherein the R group is a straight or branched first alkyl group containing 5 to 20 carbon atoms, a first group obtained by substituting one CH.sub.2 group in the first alkyl group with phenyl, cycloalkyl, CONN, COO, OCO, S, CO or CHCH, a second group obtained by substituting one of hydrogen atoms in the first alkyl group with an iron atom or a chlorine atom, or a third group obtained by substituting one of hydrogen atoms in the first group with an iron atom or a chlorine atom; and wherein the L group is a polymerizable group attached to the Z group, the L group is one composition selected from: ##STR00049## and any combination thereof.

6. The liquid crystal display panel according to claim 5, wherein the auxiliary alignment agent comprises one A group, two Sp groups, one Z group, one R group, and one L group, and the structural formula of the auxiliary alignment agent is: ##STR00050##

7. The liquid crystal display panel according to claim 5, wherein the A group comprises one composition selected from the group consisting of: ##STR00051## and any combination thereof.

8. The liquid crystal display panel according to claim 5, wherein the structural formula of the auxiliary alignment agent is represented by one of formulas selected from: ##STR00052## ##STR00053## ##STR00054##

9. The liquid crystal display panel according to claim 5, wherein the polymerizable monomer includes one selected from the group consisting of an acrylate, an acrylate derivative, a methacrylate, a methacrylate derivative, styrene, a styrene derivative, an epoxy resin, and any combination thereof.

10. A liquid crystal material, comprising: liquid crystal molecules, a polymerizable monomer, and an auxiliary alignment agent; wherein a structural formula of the auxiliary alignment agent comprises at least one A group, at least one Sp group, at least one Z group, at least one R group, and at least one L group; wherein the A group is a composition comprising at least one oxygen atom, at least one nitrogen atom, or at least one oxygen atom and at least one nitrogen atom; wherein the Sp group is a (CH.sub.2).sub.n group, or a substituted group thereof obtained by substituting one or more CH.sub.2 groups in the (CH.sub.2).sub.n group with one or more groups selected from O, S, CO, COO, OCO, OCOO, OCH.sub.2, CH.sub.2O, CHCH, CFCF, CC, CHCHCOO or OCOCHCH, and n is an integer between 1 and 8; wherein the Z group is one composition selected from: ##STR00055## and any combination thereof, and the ##STR00056## is a phenyl group, a substituted group thereof obtained by substituting one or more hydrogen atoms on the phenyl group with F, Cl, Br, I, CN, NO.sub.2 or C(O)H, or a cycloalkyl group; wherein the R group is a straight or branched first alkyl group containing 5 to 20 carbon atoms, a first group obtained by substituting one CH.sub.2 group in the first alkyl group with phenyl, cycloalkyl, CONH, COO, OCO, S, CO or CHCH, a second group obtained by substituting one of hydrogen atoms in the first alkyl group with an iron atom or a chlorine atom, or a third group obtained by substituting one of hydrogen atoms in the first group with an iron atom or a chlorine atom; and wherein the L group is a polymerizable group attached to the Z group, the L group is one or more than one of compositions selected from: ##STR00057## and any combination thereof.

11. The liquid crystal material according to claim 10, wherein the auxiliary alignment agent comprises one A group, two Sp groups, one Z group, one R group, and one L group, and the structural formula of the auxiliary alignment agent is: ##STR00058##

12. The liquid crystal material according to claim 10, wherein the structural formula of the auxiliary alignment agent is represented by one of formulas selected from: ##STR00059## ##STR00060## ##STR00061##

13. The liquid crystal material according to claim 10, wherein the polymerizable monomer includes one selected from the group consisting of an acrylate, an acrylate derivative, a methacrylate, a methacrylate derivative, styrene, a styrene derivative, an epoxy resin, and any combination thereof.

Description

DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings used in the embodiments. Obviously, the drawings in the following description merely show some of the embodiments of the present invention. As regards one of ordinary skill in the art, other drawings can be obtained in accordance with these accompanying drawings without making creative efforts.

[0045] FIG. 1 is a flow chart of a manufacturing process of an auxiliary alignment agent in a liquid crystal material according to a preferred embodiment of this disclosure.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0046] This description of the exemplary embodiments is intended to be read in connection with the accompanying drawings, which are to be considered part of the entire written description. In the description, terms such as lower, upper, horizontal, vertical, above, below, up, down, top, and bottom, as well as derivatives thereof, should be construed to refer to the orientation as then described or as shown in the drawing under discussion. These terms are for convenience of description and do not require that the apparatus be constructed or operated in a particular orientation, and do not limit the scope of the disclosure. Referring to the drawings of the disclosure, similar components are labeled with the same number.

[0047] The disclosure provides a liquid crystal material. The liquid crystal material comprises liquid crystal molecules, a polymerizable monomer, and an auxiliary alignment agent.

[0048] The polymerizable monomer includes one selected from the group consisting of an acrylate, an acrylate derivative, a methacrylate, a methacrylate derivative, styrene, a styrene derivative, an epoxy resin, and any combination thereof.

[0049] A structural formula of the auxiliary alignment agent comprises at least one A group, at least one Sp group, at least one Z group, at least one R group, and at least one L group.

[0050] Preferably, in a preferred embodiment of the disclosure, the auxiliary alignment agent comprises one A group, two Sp groups, one Z group, one R group, and one L group, and the structural formula of the auxiliary alignment agent is:

##STR00021##

[0051] The A group is a composition comprising at least one oxygen atom, at least one nitrogen atom, or at least one oxygen atom and at least one nitrogen atom. In the disclosure, the A group is also referred to as anchor group. The presence of the nitrogen atoms and oxygen atoms of the A group increases an interaction of an additive material with SiNx/PFA, so as to solve problems such as alignment force difference, and display defects of the bright lines and the dark lines due to differences of a pixel electrode. Preferably, the A group is one composition selected from the group consisting of:

##STR00022##

and any combination thereof.

[0052] In a preferred embodiment of the disclosure, the auxiliary alignment agent comprises two Sp groups located between the A group and the Z group, and between the Z group and the R group, respectively. The Sp group is a (CH.sub.2).sub.n group, or a substituted group thereof obtained by substituting one or more CH.sub.2 groups in the (CH.sub.2).sub.n group with one or more groups selected from O, S, CO, OOO, OCO, OCOO, OCH.sub.2, CH.sub.2O, CHCH, CFCF, CC, CHCHCOO or OCOCHCH, and n is an integer between 1 and 8.

[0053] In a preferred embodiment of the disclosure, the auxiliary alignment agent comprises one of the Z groups, the Z group is located between two of the Sp groups. The Z group is one composition selected from:

##STR00023##

and any combination thereof. Preferably, the

##STR00024##

is a phenyl group, a substituted group thereof obtained by substituting one or more hydrogen atoms on the phenyl group with F, Cl, Br, I, CN, NO.sub.2 or C(O)H, or a cycloalkyl group.

[0054] In a preferred embodiment of the disclosure, the auxiliary alignment agent comprises one of the R groups. The R group is linked to the Sp group. The R group is a straight or branched first alkyl group containing 5 to 20 carbon atoms, a first group obtained by substituting one CH.sub.2 group in the first alkyl group with phenyl, cycloalkyl, CONH, COO, OCO, S, CO or CHCH, a second group obtained by substituting one of hydrogen atoms in the first alkyl group with an iron atom or a chlorine atom, or a third group obtained by substituting one of hydrogen atoms in the first group with an iron atom or a chlorine atom.

[0055] In a preferred embodiment of the disclosure, the auxiliary alignment agent comprises one of the L groups. The L group is a polymerizable group attached to the Z group. The L group is one or more than one of compositions selected from:

##STR00025##

[0056] and any combination thereof.

[0057] Preferably, the structural formula of the auxiliary alignment agent is represented by one of formulas selected from:

##STR00026## ##STR00027##

[0058] A following embodiment takes the auxiliary alignment agent (as shown below) as an example for describing a manufacturing process of the auxiliary alignment agent as shown in FIG. 1.

##STR00028##

[0059] In a step S10, first of all, a substance a (0.02 mol) and a substance b (0.02 mol) of are dissolved in toluene (200 mL), and 100 mL of ethanol and 40 mL of Na.sub.2CO.sub.3 solution with a concentration of 1 mol/L are added into the toluene. A rare gas, such as argon, is introduced into the toluene. After 30 minutes, Tetrakis-(triphenylphosphine) palladium (100 mg) was added into the toluene so as to form a mixed solution. The mixed solution is heated to reflux for 60 min. Finally, after separation, a substance c is obtained.

##STR00029##

[0060] In a step S20, the compound c (0.01 mol) is dissolved in 50 mL of a dichloromethane solution and cool to 28 C. Then, 0.02 mol of boron trifluoride was added to the cooled mixed dichloromethane solution, and the cooled mixed dichloromethane solution is stirred at 25 C. for 3 hours while reacting. Finally, under a condition of an ice bath, a NaOH solution (having a substance concentration of 2 mol/L) is added to the mixed dichloromethane solution, and a substance d is obtained after separation and purification.

##STR00030##

[0061] In a step S30, first of all, the compound d (410.sup.3 mol), methacrylic acid (610.sup.3 mol) and 4-(dimethylamino)pyridine (210.sup.4 mol) are dissolved in a dichloromethane solution (25 mL) for forming a mixed dichloromethane solution, and the mixed dichloromethane solution is cooled to 1 C. Secondly, the cooled mixed dichloromethane solution is gradually added dropwise a dichloromethane solution containing carbodiimide (610.sup.3 mol) so as to from a dropping process system. A temperature of the dropping process system is maintained at 14 C. Finally, a reaction of the dropping process system is stirred at a room temperature for 18 hours, and a compound e is obtained after separation and purification.

##STR00031##

[0062] In this embodiment, H.sup.1NMR data for Compound e is as follows: : 0.96 (3H), 1.33 (2H), 1.29 (4H), 1.62 (2H), 2.55 (2H), 7.18 (2H), 7.43 (2H), 7.40 (1H), 6.99 (2H), 5.50 (1H), 3.71 (2H), 6.0 (2H), 5.49 (1H), 5.98 (1H), and 1.93 (1H).

[0063] The disclosure further provides a liquid crystal display panel. The liquid crystal display panel comprises an array substrate, a color filter substrate disposed opposite to the array substrate, and a liquid crystal material disposed between the array substrate and the color filter substrate.

[0064] The liquid crystal material comprises liquid crystal molecules, a polymerizable monomer, and an auxiliary alignment agent.

[0065] The polymerizable monomer includes one selected from the group consisting of an acrylate, an acrylate derivative, a methacrylate, a methacrylate derivative, styrene, a styrene derivative, an epoxy resin, and any combination thereof.

[0066] A structural formula of the auxiliary alignment agent comprises at least one A group, at least one Sp group, at least one Z group, at least one R group, and at least one L group.

[0067] Preferably, in a preferred embodiment of the disclosure, the auxiliary alignment agent comprises one A group, two Sp groups, one Z group, one R group, and one L group, and the structural formula of the auxiliary alignment agent is:

##STR00032##

[0068] The A group is a composition comprising at least one oxygen atom, at least one nitrogen atom, or at least one oxygen atom and at least one nitrogen atom. In the disclosure, the A group is also referred to as anchor group. The presence of the nitrogen atoms and oxygen atoms of the A group increases an interaction of an additive material with SiNx/PFA, so as to solve problems such as alignment force difference, and display defects of the bright lines and the dark lines due to differences of a pixel electrode. Preferably, the A group is one composition selected from the group consisting of:

##STR00033##

and any combination thereof.

[0069] In a preferred embodiment of the disclosure, the auxiliary alignment agent comprises two Sp groups located between the A group and the Z group, and between the Z group and the R group, respectively. The Sp group is a (CH.sub.2).sub.n group, or a substituted group thereof obtained by substituting one or more CH.sub.2 groups in the (CH.sub.2).sub.n group with one or more groups selected from O, S, CO, OOO, OCO, OCOO, OCH.sub.2, CH.sub.2O, CHCH, CFCF, CC, CHCHCOO or OCOCHCH, and n is an integer between 1 and 8.

[0070] In a preferred embodiment of the disclosure, the auxiliary alignment agent comprises one of the Z groups, the Z group is located between two of the Sp groups. The Z group is one composition selected from:

##STR00034##

and any combination thereof. Preferably, the

##STR00035##

is a phenyl group, a substituted group thereof obtained by substituting one or more hydrogen atoms on the phenyl group with F, Cl, Br, I, CN, NO.sub.2 or C(O)H, or a cycloalkyl group.

[0071] In a preferred embodiment of the disclosure, the auxiliary alignment agent comprises one of the R groups. The R group is linked to the Sp group. The R group is a straight or branched first alkyl group containing 5 to 20 carbon atoms, a first group obtained by substituting one CH.sub.2 group in the first alkyl group with phenyl, cycloalkyl, CONN, COO, OCO, S, CO or CHCH, a second group obtained by substituting one of hydrogen atoms in the first alkyl group with an iron atom or a chlorine atom, or a third group obtained by substituting one of hydrogen atoms in the first group with an iron atom or a chlorine atom.

[0072] In a preferred embodiment of the disclosure, the auxiliary alignment agent comprises one of the L groups. The L group is a polymerizable group attached to the Z group. The L group is one or more than one of compositions selected from:

##STR00036##

and any combination thereof.

[0073] Preferably, the structural formula of the auxiliary alignment agent is represented by one of formulas selected from:

##STR00037## ##STR00038##

[0074] the disclosure provides the liquid crystal material and the liquid crystal display panel. The liquid crystal material comprises liquid crystal molecules, a polymerizable monomer, and an auxiliary alignment agent. A structural formula of the auxiliary alignment agent comprises at least one A group, at least one Sp group, at least one Z group, at least one R group, and at least one L group. The presence of the A group in the auxiliary alignment agent enhances the interaction of an additive material with SiNx/PFA, thereby solving the problems of alignment force difference, the drawbacks of the bright lines and the dark lines due to differences of the conventional pixel electrode. Therefore, the liquid crystal display panel can achieve the technical effect of uniform alignment. Moreover, the disclosure also eliminates PI materials and related PI processes and improves process efficiency.

[0075] This disclosure has been described with preferred embodiments thereof, and it is understood that many changes and modifications to the described embodiment can be carried out without departing from the scope and the spirit of the invention.