Liquid crystal composition and display panel

Abstract

The embodiment of the present application discloses a liquid crystal composition and a display panel, the liquid crystal composition comprises at least one first compound represented by general formula (I), at least one second compound selected from general formula (II) and at least one third compound selected from general formula (III-1) to general formula (III-3), the present application improves the performance of the liquid crystal composition in the aspects of clearing point, rotational viscosity, dielectric anisotropy and optical anisotropy by adding the first compound, the second compound and the third compound in the liquid crystal composition, thereby improving the display effect and product quality of the display panel using the liquid crystal composition.

Description

Technical Field

[0001] This invention relates to the field of displays, and more specifically to a liquid crystal composition and a display panel. Background Technology

[0002] Liquid crystal display (LCD) panels utilize the application of voltage to the liquid crystal layer to control the optical properties of the materials within it, thereby enabling the display function. The physical properties of the liquid crystal materials (such as viscosity, clearing point, dielectric anisotropy, and optical anisotropy) directly affect the display quality and overall performance of the LCD panel. Currently, the performance of materials used in liquid crystal layers still requires improvement, hindering the enhancement of display quality and overall product performance.

[0003] Therefore, there is an urgent need for a liquid crystal composition and display panel to solve the above-mentioned technical problems. Summary of the Invention

[0004] This invention provides a method to alleviate the technical problem that makes it difficult to improve the display effect and product quality of display panels due to the need to improve the material properties in the liquid crystal layer.

[0005] This invention provides a liquid crystal composition comprising at least one first compound represented by general formula (I), at least one second compound selected from general formula (II), and at least one third compound selected from general formulas (III-1) to (III-3):

[0006]

[0007]

[0008] Among them, X1 and X2 are independently selected from O or S;

[0009] A1 and A2 are each independently selected from single bonds, -O-, -S-, substituted or unsubstituted alkylene groups having 1-7 carbon atoms, substituted or unsubstituted alkoxy groups having 1-7 carbon atoms, substituted or unsubstituted alkenyl groups having 2-7 carbon atoms, substituted or unsubstituted alkenyloxy groups having 2-7 carbon atoms, substituted or unsubstituted alkynyl groups having 2-7 carbon atoms, and substituted or unsubstituted alkynyloxy groups having 2-7 carbon atoms. At least one H in A1 or A2 is substituted by any atom of F, Cl, Br, I, or H.

[0010] W1, W2, as well as Selected independently from single bonds,

[0011]

[0012] W1, W2, as well as At least one H atom in the atom is replaced by any one of F, Cl, Br, I, or H.

[0013] n is independently selected from 0, 1, or 2;

[0014] Z is independently selected from single bonds, -O-, -S-, -SO2-, -CO-, -C(O)O-, -OC(O)-, -OC(O)O-, -CF2O-, -OCF2-, -CH2CH2-, -CF2CF2-, -CF2CH2-, -(CH2)3-, -CH2CF2-, -CHF-CHF-, -CH2O-, -OCH2-, -CF=CH-, -CH=CF-, -CF=CF-, -CH=CH- or -C≡C-, and at least one H in Z is substituted by any atom from F, Cl, Br, I, H;

[0015] R1, R2, R3, R4, R5, and R6 are each independently selected from H, F, Cl, Br, I, CN, SCN, NCS, SF5, substituted or unsubstituted alkyl groups having 1-15 carbon atoms, substituted or unsubstituted alkoxy groups having 1-15 carbon atoms, substituted or unsubstituted alkenyl groups having 2-15 carbon atoms, substituted or unsubstituted alkenyloxy groups having 2-15 carbon atoms, substituted or unsubstituted alkynyl groups having 2-15 carbon atoms, and substituted or unsubstituted alkynyloxy groups having 2-15 carbon atoms.

[0016] Preferably, the terminal groups of R1, R2, R3, R4, R5 and R6 are independently monosubstituted by H, CN or CF3;

[0017] In particular, one or more of the -CH2- atoms in R1, R2, R3, R4, R5, and R6 are independently replaced by -O-, -S-, -SO2-, -CO-, -C(O)O-, -OC(O)-, -OC(O)O-, -CF2O-, -OCF2-, -CH2-CH2-, -(CH2)3-, -CF2-CF2-, -CF2-CH2-, -CH2-CF2-, -CHF-CHF-, -CH2O-, -OCH2-, -CF=CH-, -CH=CF-, -CF=CF-, -CH=CH-, or -C≡C-, and the heteroatoms directly bonded to C are not directly bonded to each other. At least one H atom in R1, R2, R3, R4, R5, and R6 is replaced by any atom in F, Cl, Br, I, or H.

[0018] Preferably, the first compound has a structure as shown in at least one of the general formulas (I-1) to (I-12):

[0019]

[0020] Preferably, the third compound has a structure as shown in at least one of the general formulas (Ⅲ-1-1) to (Ⅲ-1-10), (Ⅲ-2-1) to (Ⅲ-2-4), or (Ⅲ-3-1) to (Ⅲ-3-2):

[0021]

[0022]

[0023] Preferably, the liquid crystal composition further comprises at least one fourth compound represented by general formula (Ⅳ):

[0024]

[0025] R7 and R8 are independently selected from alkyl groups having 1-10 carbon atoms, alkoxy groups having 1-10 carbon atoms, alkenyl groups having 2-10 carbon atoms, alkenyloxy groups having 2-10 carbon atoms, alkynyl groups having 2-10 carbon atoms, and alkynyloxy groups having 2-10 carbon atoms, respectively, and at least one H in R7 or R8 is substituted by any atom from F, Cl, Br, I, and H.

[0026] Preferably, the liquid crystal composition further comprises at least one fifth compound represented by general formula (V):

[0027]

[0028] Among them, R9 and R 10 Each of the following is independently selected from alkyl groups having 1-10 carbon atoms, alkoxy groups having 1-10 carbon atoms, alkenyl groups having 2-10 carbon atoms, alkenyloxy groups having 2-10 carbon atoms, alkynyl groups having 2-10 carbon atoms, alkynyloxy groups having 2-10 carbon atoms, R9, or R 10 At least one H in the substance is replaced by any one of F, Cl, Br, I, or H atoms.

[0029] Preferably, the liquid crystal composition further comprises at least one sixth compound represented by general formula (VI):

[0030]

[0031] Among them, R 11 and R 12 Each of the following is independently selected from alkyl groups having 1-10 carbon atoms, alkoxy groups having 1-10 carbon atoms, alkenyl groups having 2-10 carbon atoms, alkenyloxy groups having 2-10 carbon atoms, alkynyl groups having 2-10 carbon atoms, and alkynyloxy groups having 2-10 carbon atoms, R11 Or R 12 At least one H in the substance is replaced by any one of F, Cl, Br, I, or H atoms.

[0032] Preferably, in the liquid crystal composition, when the third compound is selected from compounds represented by general formula (Ⅲ-1), the mass fraction of the first compound is 1% to 30%, the mass fraction of the second compound is 1% to 75%, and the mass fraction of the third compound is 1% to 70%; or,

[0033] In the liquid crystal composition, when the third compound is selected from compounds represented by general formula (Ⅲ-2), the mass fraction of the first compound is 1% to 30%, the mass fraction of the second compound is 1% to 75%, and the mass fraction of the third compound is 1% to 50%; or,

[0034] In the liquid crystal composition, when the third compound is selected from compounds represented by general formula (Ⅲ-3), the mass fraction of the first compound is 1% to 30%, the mass fraction of the second compound is 1% to 75%, and the mass fraction of the third compound is 1% to 30%.

[0035] Preferably, in the liquid crystal composition, when the third compound is selected from compounds represented by general formula (Ⅲ-1), the mass fraction of the first compound is 1% to 20%, the mass fraction of the second compound is 10% to 70%, and the mass fraction of the third compound is 5% to 65%; or,

[0036] In the liquid crystal composition, when the third compound is selected from compounds represented by general formula (Ⅲ-2), the mass fraction of the first compound is 1% to 20%, the mass fraction of the second compound is 10% to 70%, and the mass fraction of the third compound is 1% to 40%; or,

[0037] In the liquid crystal composition, when the third compound is selected from compounds represented by general formula (Ⅲ-3), the mass fraction of the first compound is 1% to 20%, the mass fraction of the second compound is 10% to 70%, and the mass fraction of the third compound is 1% to 20%.

[0038] The present invention also provides a display panel, comprising a first substrate, a second substrate located on the first substrate, and a liquid crystal layer located between the first substrate and the second substrate;

[0039] The liquid crystal layer comprises the liquid crystal composition as described above.

[0040] The present invention improves the performance of a liquid crystal composition in terms of clearing point, rotational viscosity, dielectric anisotropy, and optical anisotropy by adding a first compound, a second compound, and a third compound to the liquid crystal composition, thereby improving the display effect and product quality of the display panel using the liquid crystal composition. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a flowchart of a method for preparing a liquid crystal composition according to an embodiment of the present invention;

[0043] Figure 2 This is a schematic diagram of a display panel provided in an embodiment of the present invention. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present invention and are not intended to limit the present invention. In the present invention, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0045] Currently, due to the need to improve the performance of liquid crystal layer materials, there are problems with the display effect and product quality of liquid crystal display panels.

[0046] This invention provides a liquid crystal composition comprising at least one first compound represented by general formula (I), at least one second compound selected from general formula (II), and at least one third compound selected from general formulas (III-1) to (III-3):

[0047]

[0048] Among them, X1 and X2 are independently selected from O or S;

[0049] A1 and A2 are each independently selected from single bonds, -O-, -S-, substituted or unsubstituted alkylene groups having 1-7 carbon atoms, substituted or unsubstituted alkoxy groups having 1-7 carbon atoms, substituted or unsubstituted alkenyl groups having 2-7 carbon atoms, substituted or unsubstituted alkenyloxy groups having 2-7 carbon atoms, substituted or unsubstituted alkynyl groups having 2-7 carbon atoms, and substituted or unsubstituted alkynyloxy groups having 2-7 carbon atoms. At least one H in A1 or A2 is substituted by any atom of F, Cl, Br, I, or H.

[0050] W1, W2, as well as Selected independently from single bonds,

[0051]

[0052] W1, W2, as well as At least one H atom in the atom is replaced by any one of F, Cl, Br, I, or H.

[0053] n is independently selected from 0, 1, or 2;

[0054] Z is independently selected from single bonds, -O-, -S-, -SO2-, -CO-, -C(O)O-, -OC(O)-, -OC(O)O-, -CF2O-, -OCF2-, -CH2CH2-, -CF2CF2-, -CF2CH2-, -(CH2)3-, -CH2CF2-, -CHF-CHF-, -CH2O-, -OCH2-, -CF=CH-, -CH=CF-, -CF=CF-, -CH=CH- or -C≡C-, and at least one H in Z is substituted by any atom from F, Cl, Br, I, H;

[0055] R1, R2, R3, R4, R5, and R6 are each independently selected from H, F, Cl, Br, I, CN, SCN, NCS, SF5, substituted or unsubstituted alkyl groups having 1-15 carbon atoms, substituted or unsubstituted alkoxy groups having 1-15 carbon atoms, substituted or unsubstituted alkenyl groups having 2-15 carbon atoms, substituted or unsubstituted alkenyloxy groups having 2-15 carbon atoms, substituted or unsubstituted alkynyl groups having 2-15 carbon atoms, and substituted or unsubstituted alkynyloxy groups having 2-15 carbon atoms.

[0056] The addition of the first compound helps to improve the clearing point, optical anisotropy value, and absolute value of dielectric constant anisotropy of the liquid crystal composition, thereby improving the performance of the liquid crystal composition.

[0057] The second compound helps to reduce the rotational viscosity of the liquid crystal composition, thereby improving the response time when the liquid crystal composition is applied to a display panel.

[0058] When the third compound is selected from compounds represented by general formula (Ⅲ-1), it is beneficial to increase the absolute value of the dielectric constant anisotropy of the liquid crystal composition, thereby reducing the driving voltage required to drive the liquid crystal composition and reducing the power consumption of the liquid crystal display panel using the liquid crystal composition.

[0059] When the third compound is selected from the compound represented by (Ⅲ-2), it is beneficial to improve the clearing point of the liquid crystal composition and adjust the optical anisotropy value of the liquid crystal composition, thereby improving the high temperature resistance of the liquid crystal composition and adjusting the light transmittance of the liquid crystal composition.

[0060] When the third compound is selected from compounds represented by (Ⅲ-3), it is beneficial to improve the absolute value of the optical anisotropy value and the dielectric constant anisotropy value of the liquid crystal composition, thereby improving the light transmittance of the liquid crystal composition and reducing the driving voltage required to drive the liquid crystal composition.

[0061] The present invention improves the performance of a liquid crystal composition in terms of clearing point, rotational viscosity, dielectric anisotropy, and optical anisotropy by adding a first compound, a second compound, and a third compound to the liquid crystal composition, thereby improving the display effect and product quality of the display panel using the liquid crystal composition.

[0062] In this embodiment, A1, A2, W1, W2, as well as In the optional groups, "-" indicates the linking site.

[0063] In some embodiments, the terminal groups of R1, R2, R3, R4, R5, and R6 are independently monosubstituted by H, CN, or CF3, respectively.

[0064] In particular, one or more of the -CH2- atoms in R1, R2, R3, R4, R5, and R6 can be independently replaced by -O-, -S-, -SO2-, -CO-, -C(O)O-, -OC(O)-, -OC(O)O-, -CF2O-, -OCF2-, -CH2-CH2-, -(CH2)3-, -CF2-CF2-, -CF2-CH2-, -CH2-CF2-, -CHF-CHF-, -CH2O-, -OCH2-, -CF=CH-, -CH=CF-, -CF=CF-, -CH=CH-, or -C≡C-, and the heteroatoms directly bonded to C are not directly bonded to each other. At least one H atom in R1 or R2 is replaced by any atom from F, Cl, Br, I, or H.

[0065] In some embodiments, R1, R2, R3, R4, R5, and R6 are each independently selected from H, F, Cl, Br, substituted or unsubstituted alkyl groups having 1-7 carbon atoms, substituted or unsubstituted alkoxy groups having 1-7 carbon atoms, substituted or unsubstituted alkenyl groups having 2-7 carbon atoms, substituted or unsubstituted alkenyloxy groups having 2-7 carbon atoms, substituted or unsubstituted alkynyl groups having 2-7 carbon atoms, and substituted or unsubstituted alkynyloxy groups having 2-7 carbon atoms.

[0066] In some embodiments, R1, R2, R3, R4, R5, and R6 are each independently selected from H, F, alkyl groups having 1-7 carbon atoms, alkoxy groups having 1-7 carbon atoms, alkenyl groups having 2-7 carbon atoms, alkenoxy groups having 2-7 carbon atoms, alkynyl groups having 2-7 carbon atoms, and alkynoxy groups having 2-7 carbon atoms.

[0067] In some embodiments, when R1, R2, R3, R4, R5, and R6 are each independently selected from alkyl, alkenyl, or alkynyl groups, the alkyl, alkenyl, and alkynyl groups are aliphatic hydrocarbon groups.

[0068] Wherein, when R1, R2, R3, R4, R5 and R6 are each independently selected from alkyl groups, the alkyl group can be a straight-chain alkyl group or a branched alkyl group, preferably a straight-chain alkyl group; more preferably, R1 and R2 are each independently selected from straight-chain alkyl groups having 1 to 7 carbon atoms, such as: methyl, ethyl, propyl, butyl, pentyl, hexyl or heptyl.

[0069] When R1, R2, R3, R4, R5, and R6 are each independently selected from alkenyl groups, the alkenyl group can be a straight-chain alkenyl group or a branched alkenyl group, and the alkenyl group can be an E-configuration or a Z-configuration isomer, and has at least one carbon-carbon double bond, preferably a straight-chain alkenyl group having 2-7 carbon atoms, more preferably vinyl, propenyl, propenyl, butenyl, butenyl, butenyl, butenyl, pentenyl, pentyl -2-enyl, pent-3-enyl, pent-4-enyl, hex-1-enyl, hex-2-enyl, hex-3-enyl, hex-4-enyl, hex-5-enyl, hept-1-enyl, hept-2-enyl, hept-3-enyl, hept-4-enyl, hept-5-enyl, hept-6-enyl, etc.; further preferably prop-2-enyl, but-2-enyl, but-3-enyl, pent-2-enyl, pent-3-enyl, pent-4-enyl.

[0070] When R1, R2, R3, R4, R5, and R6 are each independently selected from alkynyl groups, the alkynyl group can be a straight-chain alkynyl group or a branched-chain alkynyl group, and has at least one carbon-carbon triple bond. Preferably, it is a straight-chain alkynyl group with 2-7 carbon atoms, more preferably ethynyl, prop-1-alkynyl, prop-2-alkynyl, but-1-alkynyl, but-2-alkynyl, but-3-alkynyl, pent-1-alkynyl, pent-2-alkynyl, pent-3-alkynyl Alynyl, penta-4-ynyl, hex-1-ynyl, hex-2-ynyl, hex-3-ynyl, hex-4-ynyl, hex-5-ynyl, hep-1-ynyl, hep-2-ynyl, hep-3-ynyl, hep-4-ynyl, hep-5-ynyl, or hep-6-ynyl; more preferably prop-2-ynyl, but-2-ynyl, but-3-ynyl, penta-2-ynyl, penta-3-ynyl, or penta-4-ynyl.

[0071] In some embodiments, the first compound has a structure as shown by at least one of general formulas (I-1) to (I-12):

[0072]

[0073] In some embodiments, W1 and W2 are each independently preferred from a single bond,

[0074] In some embodiments, A1 and A2 are each independently preferred from an alkeneoxy group having 1-2 carbon atoms.

[0075] In some embodiments, the first compound is selected from compounds shown below:

[0076]

[0077] In some embodiments, R3 and R4 are each independently preferred from H, F, an alkyl group having 1-3 carbon atoms, or an alkenyl group having 1-3 carbon atoms.

[0078] In some embodiments, the second compound is selected from compounds shown below:

[0079]

[0080] In some embodiments as well as Each independently selects from

[0081] In some embodiments, Z is independently preferred from single bonds, -O-, -CH2O-, -OCH2-, and -CH2-CH2-.

[0082] In some embodiments, R5 and R6 are each independently preferred from H, F, an alkyl group having 1-5 carbon atoms, an alkoxy group having 1-5 carbon atoms, or an alkenyl group having 1-5 carbon atoms.

[0083] In some embodiments, the third compound has a structure as shown in at least one of the general formulas (Ⅲ-1-1) to (Ⅲ-1-10), (Ⅲ-2-1) to (Ⅲ-2-4), or (Ⅲ-3-1) to (Ⅲ-3-2):

[0084]

[0085] In some embodiments, the third compound is selected from compounds listed below:

[0086]

[0087] In some embodiments, the liquid crystal composition further includes at least one fourth compound represented by general formula (Ⅳ):

[0088]

[0089] R7 and R8 are independently selected from alkyl groups having 1-10 carbon atoms, alkoxy groups having 1-10 carbon atoms, alkenyl groups having 2-10 carbon atoms, alkenyloxy groups having 2-10 carbon atoms, alkynyl groups having 2-10 carbon atoms, and alkynyloxy groups having 2-10 carbon atoms, respectively, and at least one H in R7 or R8 is substituted by any atom from F, Cl, Br, I, and H.

[0090] The fourth compound is beneficial for increasing the absolute value of the dielectric constant anisotropy and the optical anisotropy of the liquid crystal composition, as well as increasing the clearing point and reducing the rotational viscosity of the liquid crystal composition, thereby improving the performance of the liquid crystal composition.

[0091] In some embodiments, R7 and R8 are each independently preferred from an alkyl group having 1-7 carbon atoms, an alkoxy group having 2-7 carbon atoms, an alkenyl group having 1-7 carbon atoms, an alkenyl group having 2-7 carbon atoms, an alkynyl group having 2-7 carbon atoms, and an alkynyl group having 2-7 carbon atoms.

[0092] In some embodiments, R7 and R8 are respectively independently preferred from an alkyl group having 1-4 carbon atoms and an alkenyl group having 1-4 carbon atoms.

[0093] In some embodiments, the fourth compound is selected from compounds listed below:

[0094]

[0095] In some embodiments, the liquid crystal composition further includes at least one fifth compound represented by general formula (V):

[0096]

[0097] Among them, R9 and R 10 Each of the following is independently selected from alkyl groups having 1-10 carbon atoms, alkoxy groups having 1-10 carbon atoms, alkenyl groups having 2-10 carbon atoms, alkenyloxy groups having 2-10 carbon atoms, alkynyl groups having 2-10 carbon atoms, alkynyloxy groups having 2-10 carbon atoms, R9, or R 10 At least one H in the substance is replaced by any one of F, Cl, Br, I, or H atoms.

[0098] The fifth compound is beneficial for improving the clearing point of the liquid crystal composition and adjusting the optical anisotropy value of the liquid crystal composition, thereby improving the high temperature resistance of the liquid crystal composition and adjusting the light transmittance of the liquid crystal composition.

[0099] In some embodiments, R9 and R 10 They are each independently preferred from alkyl groups having 1-7 carbon atoms, alkoxy groups having 2-7 carbon atoms, alkenyl groups having 1-7 carbon atoms, alkenyl groups having 2-7 carbon atoms, alkynyl groups having 2-7 carbon atoms, and alkynyl groups having 2-7 carbon atoms.

[0100] In some embodiments, R9 and R 10 Each is independently selected from alkyl groups having 1-3 carbon atoms.

[0101] In some embodiments, the fifth compound is selected from the following compounds:

[0102]

[0103] In some embodiments, the liquid crystal composition further includes at least one sixth compound represented by general formula (VI):

[0104]

[0105] Among them, R 11 and R 12 Each of the following is independently selected from alkyl groups having 1-10 carbon atoms, alkoxy groups having 1-10 carbon atoms, alkenyl groups having 2-10 carbon atoms, alkenyloxy groups having 2-10 carbon atoms, alkynyl groups having 2-10 carbon atoms, and alkynyloxy groups having 2-10 carbon atoms, R 11 Or R 12 At least one H in the substance is replaced by any one of F, Cl, Br, I, or H atoms.

[0106] The sixth compound is beneficial for improving the optical anisotropy value of the liquid crystal composition and reducing the rotational viscosity of the liquid crystal composition, thereby improving the performance of the liquid crystal composition.

[0107] In some embodiments, R 11 and R 12 They are each independently preferred from alkyl groups having 1-7 carbon atoms, alkoxy groups having 2-7 carbon atoms, alkenyl groups having 1-7 carbon atoms, alkenyl groups having 2-7 carbon atoms, alkynyl groups having 2-7 carbon atoms, and alkynyl groups having 2-7 carbon atoms.

[0108] In some embodiments, R 11 and R 12 They are independently preferred from alkyl groups having 1-5 carbon atoms and alkenyl groups having 1-5 carbon atoms, respectively.

[0109] In some embodiments, the sixth compound is selected from the following compounds:

[0110]

[0111] In this embodiment, when the third compound is selected from compounds represented by general formula (Ⅲ-1), the mass fraction of the first compound is 1% to 30%, the mass fraction of the second compound is 1% to 75%, and the mass fraction of the third compound is 1% to 70%.

[0112] Preferably, in the liquid crystal composition, when the third compound is selected from compounds represented by general formula (Ⅲ-1), the mass fraction of the first compound is 1% to 20%, the mass fraction of the second compound is 10% to 70%, and the mass fraction of the third compound is 5% to 65%.

[0113] More preferably, in the liquid crystal composition, when the third compound is selected from compounds represented by general formula (Ⅲ-1), the mass fraction of the first compound is 1% to 15%, the mass fraction of the second compound is 20% to 60%, and the mass fraction of the third compound is 15% to 60%.

[0114] In this embodiment, when the third compound is selected from compounds represented by general formula (Ⅲ-2), the mass fraction of the first compound is 1% to 30%, the mass fraction of the second compound is 1% to 75%, and the mass fraction of the third compound is 1% to 50%.

[0115] Preferably, in the liquid crystal composition, when the third compound is selected from compounds represented by general formula (Ⅲ-2), the mass fraction of the first compound is 1% to 20%, the mass fraction of the second compound is 10% to 70%, and the mass fraction of the third compound is 1% to 40%.

[0116] More preferably, in the liquid crystal composition, when the third compound is selected from compounds represented by general formula (Ⅲ-2), the mass fraction of the first compound is 1% to 15%, the mass fraction of the second compound is 20% to 60%, and the mass fraction of the third compound is 1% to 25%.

[0117] In this embodiment, when the third compound is selected from compounds represented by general formula (Ⅲ-3), the mass fraction of the first compound is 1% to 30%, the mass fraction of the second compound is 1% to 75%, and the mass fraction of the third compound is 1% to 30%.

[0118] Preferably, in the liquid crystal composition, when the third compound is selected from compounds represented by general formula (Ⅲ-3), the mass fraction of the first compound is 1% to 20%, the mass fraction of the second compound is 10% to 70%, and the mass fraction of the third compound is 1% to 20%.

[0119] More preferably, in the liquid crystal composition, when the third compound is selected from compounds represented by general formula (Ⅲ-3), the mass fraction of the first compound is 1% to 15%, the mass fraction of the second compound is 20% to 60%, and the mass fraction of the third compound is 1% to 15%.

[0120] In some embodiments, the optical anisotropy value of the liquid crystal composition at 25°C is greater than or equal to 0.06, and the optical anisotropy value of the liquid crystal composition at 25°C is less than or equal to 0.22, for example: 0.07, 0.08, 0.09, 0.1, 0.105, 0.11, 0.115, 0.12, 0.125, 0.15, 0.175, 0.2, 0.21, etc., so that the optical anisotropy value of the liquid crystal composition is within a suitable range, thereby improving the light transmittance of the liquid crystal composition, ensuring that the light transmittance of the liquid crystal composition is within a suitable range, and avoiding the optical anisotropy value of the liquid crystal composition from affecting the optical performance of the liquid crystal composition.

[0121] In some embodiments, the rotational viscosity of the liquid crystal composition at 25°C is greater than or equal to 10 mPa·s, and the rotational viscosity of the liquid crystal composition at 25°C is less than or equal to 200 Pa·s, for example: 20 Pa·s, 30 Pa·s, 40 Pa·s, 50 Pa·s, 60 Pa·s, 70 Pa·s, 72 Pa·s, 75 Pa·s, 78 Pa·s, 80 Pa·s, 82 Pa·s, 85 Pa·s, 90 Pa·s, 100 Pa·s, 110 Pa·s, 120 Pa·s, 130 Pa·s, 140 Pa·s, 150 Pa·s, 160 Pa·s, 170 Pa·s, 180 Pa·s, 190 Pa·s, etc., so that the rotational viscosity of the liquid crystal composition is within a suitable range, thereby increasing the rotational speed of the liquid crystal composition, ensuring that the response time of the liquid crystal composition is within a suitable range, and avoiding the influence of the rotational viscosity of the liquid crystal composition on the performance of the liquid crystal composition.

[0122] In some embodiments, the flexural elasticity coefficient of the liquid crystal composition is greater than or equal to 10, and the flexural elasticity coefficient of the liquid crystal composition is less than or equal to 25, for example: 12, 13, 14, 15, 18, 20, 22, 24, etc.; and / or, the flexural elasticity coefficient of the liquid crystal composition is greater than or equal to 10, and the flexural elasticity coefficient of the liquid crystal composition is less than or equal to 25, for example: 12, 13, 14, 15, 18, 20, 22, 24, etc.; the flexural elasticity coefficient and / or the flexural elasticity coefficient of the liquid crystal composition being within the above ranges is beneficial to improving the light transmittance of the liquid crystal composition and improving the response time of the liquid crystal composition, ensuring that the light transmittance and response time of the liquid crystal composition are within a suitable range.

[0123] In some embodiments, the dielectric constant anisotropy value of the liquid crystal composition at 25°C is greater than or equal to -10, and the dielectric constant anisotropy value of the liquid crystal composition at 25°C is less than or equal to 15, for example: -8, -6, -5, -4.2, -4.1, -4, -3.8, -3.7, -3, -2, 2, 4, 5, 8, 10, 12, etc., which is beneficial to reducing the driving voltage required to drive the liquid crystal composition, thereby reducing the driving voltage of the liquid crystal display panel using the liquid crystal composition and reducing the power consumption of the liquid crystal display panel using the liquid crystal composition.

[0124] In some embodiments, the clearing point of the liquid crystal composition is preferably between 60°C and 135°C. For example, the clearing point of the liquid crystal composition can be 62°C, 65°C, 68°C, 70°C, 75°C, 78°C, 80°C, 82°C, 84°C, 88°C, 90°C, 92°C, 95°C, 100°C, 110°C, 115°C, 120°C, 125°C, 130°C, etc., to avoid the liquid crystal composition's high-temperature resistance being reduced due to an excessively low clearing point.

[0125] Please see Figure 1 An exemplary method for preparing the liquid crystal composition provided by the present invention is as follows:

[0126] The method for preparing the liquid crystal composition includes:

[0127] S100: Weigh and mix the first compound, the second compound, and the third compound in a first order by mass percentage to obtain a first mixture.

[0128] The preferred order is that the first compound, the second compound, and the third compound are weighed and mixed in order of increasing melting point.

[0129] S200: Stir the first mixture at a first heating temperature to ensure that the first compound, the second compound, and the third compound in the first mixture are fully mixed.

[0130] The first heating temperature is preferably 60°C to 100°C.

[0131] S300: Cool the first mixture to room temperature and encapsulate it to obtain the liquid crystal composition.

[0132] Exemplary configurations of the liquid crystal composition of the present invention are shown in Exemplary Embodiments 1 to 9 below.

[0133] Example 1

[0134] The structural formulas and mass fractions of each compound in the liquid crystal composition selected in this embodiment are shown in Table 1:

[0135] Table 1: Components of the Liquid Crystal Composition

[0136]

[0137]

[0138] The liquid crystal composition obtained in Example 1 has the following performance parameters: Tni: 80℃, γ 1: 75mPa·sΔn:0.122,ne:1.738,Δε:-4.2,ε⊥ 8.3, K 11 / K 33 :14.5 / 15.2, no crystal precipitation occurred after the liquid crystal composition was placed at -20℃ for 480h. Wherein, Tni represents the clearing point of the liquid crystal composition; γ1 represents the rotational viscosity of the liquid crystal composition at 25℃; Δn represents the optical anisotropy value of the liquid crystal composition at 25℃; ne represents the refractive index of the liquid crystal composition for unusual light; Δε represents the dielectric constant anisotropy value of the liquid crystal composition at 25℃; ε ⊥ K represents the dielectric constant of the liquid crystal composition in the direction perpendicular to the long axis of the liquid crystal molecules. 11 / K 33 The ratio representing the elastic property constant of the liquid crystal composition, where K 11 K represents the flexural elasticity coefficient of the liquid crystal composition. 33 This represents the stretch elastic coefficient of the liquid crystal composition.

[0139] Example 2

[0140] The structural formulas and mass fractions of each compound in the liquid crystal composition selected in this embodiment are shown in Table 2:

[0141] Table 2: Components of the Liquid Crystal Composition

[0142]

[0143]

[0144] The liquid crystal composition obtained in Example 2 has the following performance parameters: Tni: 78℃, γ 1: 74mPa·sΔn:0.123,ne:1.757,Δε:-4.1,ε ⊥ 7.7, K 11 / K 33 :14.4 / 15.5, no crystals precipitated after the liquid crystal composition was placed at -20°C for 480 hours.

[0145] Example 3

[0146] The structural formulas and mass fractions of each compound in the liquid crystal composition selected in this embodiment are shown in Table 3:

[0147] Table 3: Components of the Liquid Crystal Composition

[0148]

[0149]

[0150] The liquid crystal composition obtained in Example 3 has the following performance parameters: Tni: 80℃, γ 1:80mPa·sΔn:0.127,ne:1.782,Δε:-3.8,ε ⊥ 8.0, K 11 / K 33 :14.5 / 15.7, no crystal precipitation occurred after the liquid crystal composition was placed at -20°C for 480 hours.

[0151] Example 4

[0152] The structural formulas and mass fractions of each compound in the liquid crystal composition selected in this embodiment are shown in Table 4:

[0153] Table 4: Components of the Liquid Crystal Composition

[0154]

[0155] The liquid crystal composition obtained in Example 4 has the following performance parameters: Tni: 82℃, γ 1: 79mPa·sΔn:0.123,ne:1.739,Δε:-3.8,ε ⊥ 7.8, K 11 / K 33 :14.6 / 14.9, no crystals precipitated after the liquid crystal composition was placed at -20°C for 480 hours.

[0156] Example 5

[0157] The structural formulas and mass fractions of each compound in the liquid crystal composition selected in this embodiment are shown in Table 5:

[0158] Table 5: Components of the Liquid Crystal Composition

[0159]

[0160]

[0161] The liquid crystal composition obtained in Example 5 has the following performance parameters: Tni: 84℃, γ 1: 86mPa·sΔn:0.125,ne:1.759,Δε:-3.7,ε ⊥ 7.4, K 11 / K 33 :14.9 / 16.1, no crystals precipitated after the liquid crystal composition was placed at -20°C for 480 hours.

[0162] Example 6

[0163] The structural formulas and mass fractions of each compound in the liquid crystal composition selected in this embodiment are shown in Table 6:

[0164] Table 6: Components of the Liquid Crystal Composition

[0165]

[0166]

[0167] The liquid crystal composition obtained in Example 6 has the following performance parameters: Tni: 84℃, γ 1: 83mPa·sΔn:0.119,ne:1.71,Δε:-3.8,ε ⊥ 7.7, K 11 / K 33 :14.7 / 15.4, no crystal precipitation occurred after the liquid crystal composition was placed at -20°C for 480 hours.

[0168] Example 7

[0169] The structural formulas and mass fractions of each compound in the liquid crystal composition selected in this embodiment are shown in Table 7:

[0170] Table 7: Components of the Liquid Crystal Composition

[0171]

[0172]

[0173] The liquid crystal composition obtained in Example 7 has the following performance parameters: Tni: 79℃, γ 1: 75mPa·sΔn:0.122,ne:1.737,Δε:-4.1,ε ⊥ 8.2, K 11 / K 33 :14.3 / 14.9, no crystal precipitation occurred after the liquid crystal composition was placed at -20°C for 480 hours.

[0174] Example 8

[0175] The structural formulas and mass fractions of each compound in the liquid crystal composition selected in this embodiment are shown in Table 8:

[0176] Table 8: Components of the Liquid Crystal Composition

[0177]

[0178]

[0179] The liquid crystal composition obtained in Example 8 has the following performance parameters: Tni: 76℃, γ 1: 75mPa·sΔn:0.124,ne:1.758,Δε:-4.0,ε ⊥ 7.6, K 11 / K 33:14.1 / 15.0, no crystal precipitation occurred after the liquid crystal composition was placed at -20°C for 480 hours.

[0180] Example 9

[0181] The structural formulas and mass fractions of each compound in the liquid crystal composition selected in this embodiment are shown in Table 9:

[0182] Table 9: Components of the Liquid Crystal Composition

[0183]

[0184]

[0185] The liquid crystal composition obtained in Example 9 has the following performance parameters: Tni: 75℃, γ 1: 76mPa·sΔn:0.121,ne:1.712,Δε:-3.8,ε ⊥ 7.9, K 11 / K 33 :13.9 / 14.9, no crystal precipitation occurred after the liquid crystal composition was placed at -20°C for 480 hours.

[0186] The nine liquid crystal compositions provided in Examples 1 to 9 all have a clearing point between 75°C and 84°C, giving them good high-temperature resistance; their rotational viscosity at 25°C is between 74 Pa·s and 86 Pa·s, giving them good rotational speed, which is beneficial for shortening the response time of the liquid crystal compositions; their optical anisotropy value at 25°C is between 0.119 and 0.127, giving them good light transmittance; their dielectric constant anisotropy value at 25°C is between -4.2 and -3.7, which is beneficial for driving the liquid crystal compositions at lower driving voltages, thereby reducing the power consumption of display panels using the liquid crystal compositions; and their flexural elasticity coefficient is between 13.9 and 14.9, and their stretch elasticity coefficient is between 14.9 and 16.1, which is beneficial for improving the light transmittance of the liquid crystal compositions and improving their response time.

[0187] Please see Figure 2 This invention also provides a display panel 100, which includes a first substrate 101, a second substrate 102 located on the first substrate 101, and a liquid crystal layer 103 located between the first substrate 101 and the second substrate 102. The liquid crystal layer 103 includes the liquid crystal composition described above.

[0188] The first substrate 101 may be an array substrate, and the second substrate 102 may be a color filter substrate. In some embodiments, when the first substrate 101 is an array substrate, the first substrate 101 includes a first substrate, an active layer on the substrate, a first insulating layer on the active layer, a gate layer on the first insulating layer, a second insulating layer on the gate layer, a source-drain layer on the second insulating layer, and a third insulating layer on the source-drain layer, wherein the source-drain layer includes a source and a drain. The display panel further includes a common electrode layer and a pixel electrode layer, wherein the pixel electrode layer is located on the side of the third insulating layer away from the first substrate, and the pixel electrode layer includes a pixel electrode, which is electrically connected to the source or the drain. The common electrode layer includes a common electrode, which may be disposed on the first substrate 101, located between the pixel electrode layer and the source / drain layer, or located on the side of the pixel electrode layer away from the first substrate; the common electrode layer may also be disposed on the second substrate 102, which includes a second substrate, with the common electrode layer located on the side of the second substrate closer to the liquid crystal layer. The display panel further includes a color filter layer, which may be disposed on the side of the first substrate closer to the liquid crystal layer or on the side of the second substrate closer to the liquid crystal layer.

[0189] The display panel 100 can be a display panel with display modes such as VA (Vertical Alignment), ECB (Electrically Controlled Birefringence), FFS (Fringe Field Switching), or IPS (In-Ilane Iwitching).

[0190] The display panel provided by the present invention improves the performance of the liquid crystal composition in terms of clearing point, rotational viscosity, dielectric anisotropy and optical anisotropy by adding a first compound, a second compound and a third compound as shown in general formula (I) to the liquid crystal composition used in the liquid crystal layer, thereby improving the display effect and product quality of the display panel using the liquid crystal composition.

[0191] This invention discloses a liquid crystal composition and a display panel. The liquid crystal composition includes at least one first compound represented by general formula (I), at least one second compound selected from general formula (II), and at least one third compound selected from general formulas (III-1) to (III-3). By adding the first, second, and third compounds to the liquid crystal composition, this invention improves the performance of the liquid crystal composition in terms of clearing point, rotational viscosity, dielectric anisotropy, and optical anisotropy, thereby improving the display effect and product quality of the display panel using the liquid crystal composition.

[0192] The liquid crystal composition and display panel provided by the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A liquid crystal composition, characterized in that, The liquid crystal composition comprises at least one first compound represented by general formula (I), at least one second compound selected from general formula (II), at least one third compound selected from general formula (III-1), at least one third compound selected from general formula (III-3), at least one fourth compound represented by general formula (IV), and at least one fifth compound represented by general formula (V). (Ⅰ)； (Ⅱ)； (Ⅲ-1)； (Ⅲ-3)； (Ⅳ)； (Ⅴ)； Among them, X1 and X2 are independently selected from O or S; A1 and A2 are independently selected from single bond, -O-, -S-, alkylene group having 1-7 carbon atoms, alkoxy group having 1-7 carbon atoms, alkenyl group having 2-7 carbon atoms, and alkenyl group having 2-7 carbon atoms, respectively. W1 is selected from or ; W2 is selected from single key or ; , Selected independently from single bonds, , , , , , , , , , , , , , ; n is independently selected from 0, 1, or 2; Z is independently selected from single bonds, -O-, -S-, -SO2-, -CO-, -C(O)O-, -OC(O)-, -OC(O)O-, -CF2O-, -CH2CH2-, -CF2CF2-, -CF2CH2-, -CHF-CHF-, -CH2O-, -CF=CH-, -CF=CF-, -CH=CH-, or -C≡C-; R1, R2, R3, R4, R5 and R6 are each independently selected from H, alkyl groups having 1-15 carbon atoms, alkoxy groups having 1-15 carbon atoms, alkenyl groups having 2-15 carbon atoms, and alkenoxy groups having 2-15 carbon atoms. R7, R8, R9 and R 10 Each is independently selected from alkyl groups having 1-10 carbon atoms, alkoxy groups having 1-10 carbon atoms, alkenyl groups having 2-10 carbon atoms, and alkenoxy groups having 2-10 carbon atoms.

2. The liquid crystal composition according to claim 1, characterized in that, The first compound has a structure as shown in at least one of the general formulas (I-1) to (I-12): 。 3. The liquid crystal composition according to claim 1, characterized in that, The third compound has a structure as shown in at least one of general formulas (Ⅲ-1-1) to (Ⅲ-1-10) and a structure as shown in at least one of general formulas (Ⅲ-3-1) to (Ⅲ-3-2): 。 4. The liquid crystal composition according to any one of claims 1 to 3, characterized in that, The liquid crystal composition further includes at least one sixth compound represented by general formula (VI): (Ⅵ)； Among them, R 11 and R 12 Each is independently selected from alkyl groups having 1-10 carbon atoms, alkoxy groups having 1-10 carbon atoms, alkenyl groups having 2-10 carbon atoms, and alkenoxy groups having 2-10 carbon atoms.

5. A display panel, characterized in that, It includes a first substrate, a second substrate located on the first substrate, and a liquid crystal layer located between the first substrate and the second substrate; The liquid crystal layer comprises a liquid crystal composition as described in any one of claims 1 to 4.

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