Liquid crystal panel and liquid crystal display device comprising same

Abstract

The invention discloses a liquid crystal panel and a liquid crystal display device comprising the same. The liquid crystal panel comprises an array substrate, a color film substrate and a liquid crystal layer, the array substrate and the color film substrate are in box alignment, the liquid crystal layer is arranged between the array substrate and the color film substrate, the surface of the side, making contact with the liquid crystal layer, of the array substrate is coated with a polyimide orientation layer, and the surface of the side, making contact with the liquid crystal layer, of the color film substrate is not coated with the polyimide orientation layer. The liquid crystal layer is prepared from a liquid crystal composition, and the liquid crystal composition comprises one or more compounds shown in the formula I and one or more polar compounds. A liquid crystal layer formed by a specific liquid crystal composition is arranged in a liquid crystal panel, especially a single-sided anchoring FFS panel, and a polyimide orientation layer is only arranged between an array substrate and the liquid crystal layer, so that the liquid crystal panel has high light transmittance, low dark state brightness and low driving voltage, and is suitable for a liquid crystal display device. I

Description

Technical Field

[0001] This invention relates to the field of liquid crystal materials technology. More specifically, it relates to a liquid crystal panel and a liquid crystal display device comprising the same. Background Technology

[0002] In the field of liquid crystal display technology, the Fringe Field Switching (FFS) mode has attracted much attention due to its superior overall performance. Compared to TN, VA, and IPS modes, FFS technology achieves a wider viewing angle, higher contrast, and better color performance through precise control of the edge electric field. Its unique liquid crystal molecule arrangement not only improves display uniformity but also significantly enhances dynamic response speed, making it an ideal choice for high-end mobile display devices. Furthermore, the excellent touch compatibility of the FFS mode provides crucial technical support for the large-scale application of modern smart terminals, fully demonstrating its significant value in the development of liquid crystal display technology.

[0003] As mobile devices increasingly demand longer battery life and display panels trend towards higher brightness and greater energy efficiency, FFS technology faces new challenges. Especially in competition with emerging display technologies, optimizing electrode structures and improving material properties to increase transmittance and reduce power consumption have become key issues for the future development of FFS technology.

[0004] To further improve transmittance and reduce power consumption, ZA-FFS (Zero Anchoring Fringe Field Switching) mode panels have been developed. These panels are characterized by replacing the liquid crystal alignment layer on the color filter substrate (CF side) with a thin film of extremely low anchoring energy, while the array substrate (TFT side) still has a liquid crystal alignment layer with strong anchoring properties coated on it. On one hand, because the CF side is not constrained by the alignment layer, it can be freely aligned solely through the edge electric field effect, reducing molecular rotational resistance. Liquid crystal molecules respond faster on the CF side, requiring a lower electric field strength, thus further reducing the driving voltage and energy consumption. On the other hand, the absence of an alignment layer on the CF side reduces light absorption and scattering losses, further improving light transmittance.

[0005] However, precisely because of the extremely low anchoring energy of the CF-side substrate, abnormal liquid crystal alignment frequently occurs in practical applications, ultimately leading to a situation where the dark state brightness of the liquid crystal panel is higher than expected, i.e., light leakage in the dark state, and the contrast is low. Therefore, it is necessary to develop liquid crystal compositions with strong anchoring properties based on matching the surface characteristics of the CF-side substrate of the liquid crystal panel. Summary of the Invention

[0006] Based on the above facts, the object of the present invention is to provide a liquid crystal panel and a liquid crystal display device comprising the same. By setting a liquid crystal layer formed of a specific liquid crystal composition in the liquid crystal panel, especially a single-sided anchored FFS panel, and providing a polyimide alignment layer only between the array substrate and the liquid crystal layer, the aforementioned technical defects can be effectively solved. This liquid crystal panel has high light transmittance, low dark-state brightness, and low driving voltage, making it suitable for use in liquid crystal display devices.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: On one hand, the present invention provides a liquid crystal panel, the liquid crystal panel comprising an array substrate and a color filter substrate of opposite cells, and a liquid crystal layer disposed between the array substrate and the color filter substrate, wherein the surface of the array substrate in contact with the liquid crystal layer is coated with a polyimide alignment layer, and the surface of the color filter substrate in contact with the liquid crystal layer is not coated with a polyimide alignment layer. The liquid crystal layer is prepared from a liquid crystal composition, wherein the liquid crystal composition contains: One or more compounds represented by Formula I, Ⅰ Wherein, R1 and R2 each independently represent an alkyl group having 1-10 carbon atoms or an alkenyl group having 2-10 carbon atoms, wherein one or more unconnected -CH2- groups may optionally be substituted with cyclopropylene, cyclopentylene, or cyclobutylene; and One or more polar compounds.

[0008] In another aspect, the present invention provides a liquid crystal display device, the liquid crystal display device comprising the liquid crystal panel as described in the first aspect above.

[0009] The beneficial effects of this invention are as follows: The liquid crystal panel provided by this invention utilizes a liquid crystal layer formed from the liquid crystal composition of this invention, achieving high transmittance, low driving voltage, and low dark-state brightness. This liquid crystal panel can be used to develop displays with high brightness, low power consumption, and high contrast. Furthermore, the liquid crystal composition comprising the compound shown in Formula I, which forms the liquid crystal layer in the liquid crystal panel provided by this invention, possesses strong anchoring properties and is well-matched with the liquid crystal panel provided by this invention. Attached Figure Description

[0010] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0011] Figure 1 The diagram shows a comparison of the dark-state brightness of the display panels prepared from the liquid crystal compositions shown in Example 11 and Comparative Example 7.

[0012] Figure 2The VT curves of a single-sided anchored FFS panel prepared using the liquid crystal composition shown in Example 11 and a conventional FFS panel are shown at 25°C. Detailed Implementation

[0013] To more clearly illustrate the present invention, the following description, in conjunction with preferred embodiments and accompanying drawings, further explains the invention. Similar components in the drawings are indicated by the same reference numerals. Those skilled in the art should understand that the specific description below is illustrative rather than restrictive and should not be construed as limiting the scope of protection of the present invention.

[0014] According to a specific embodiment of the present invention, a liquid crystal panel is provided, the liquid crystal panel comprising an array substrate and a color filter substrate of paired cells, and a liquid crystal layer disposed between the array substrate and the color filter substrate, wherein the surface of the array substrate in contact with the liquid crystal layer is coated with a polyimide alignment layer, and the surface of the color filter substrate in contact with the liquid crystal layer is not coated with a polyimide alignment layer. The liquid crystal layer is prepared from a liquid crystal composition, wherein the liquid crystal composition contains: One or more compounds represented by Formula I, Ⅰ Wherein, R1 and R2 each independently represent an alkyl group having 1-10 carbon atoms or an alkenyl group having 2-10 carbon atoms, wherein one or more unconnected -CH2- groups may optionally be substituted with cyclopropylene, cyclopentylene, or cyclobutylene; and One or more polar compounds.

[0015] In some more specific examples, the compound represented by Formula I is selected from the group consisting of compounds represented by Formulas I-1 to I-9 below. Ⅰ-1 Ⅰ-2 Ⅰ-3 I-4 Ⅰ-5 Ⅰ-6 Ⅰ-7 I-8 Ⅰ-9.

[0016] In some more specific examples, the compound represented by Formula I is preferably selected from at least one of the compounds represented by Formulas I-2, I-4, I-6, I-8 and I-9.

[0017] In some examples, the content of the compound represented by Formula I in the liquid crystal composition, by weight percentage, includes, but is not limited to, 1-50%.

[0018] In some preferred embodiments, the content of the compound represented by Formula I in the liquid crystal composition, by mass percentage, includes, but is not limited to, 1-30%. Under these conditions, the basic parameters of the liquid crystal composition, such as γ1, Δε, and low-temperature storage temperature, can better meet the requirements of the terminal for the response speed, driving voltage, and low-temperature storage and operating temperature of the liquid crystal display.

[0019] In some specific examples, the lower limit content of the compound represented by Formula I in the liquid crystal composition, by mass percentage, is selected from 1%, 5%, 10%, 15%, 20%, and the upper limit content of the compound represented by Formula I is selected from 10%, 15%, 20%, 30%, 40%, 50%.

[0020] In some more specific examples, the content of the compound represented by Formula I in the liquid crystal composition, by mass percentage, includes, but is not limited to, 5-30%, 5-20%, 5-15%, 5-10%, 10-30%, 10-20%, 10-15%, 15-30%, 15-20%, 20-30%, etc.

[0021] In some examples, the liquid crystal composition further comprises one or more compounds represented by Formula II. II R3 and R4 each independently represent an alkyl group with 1-10 carbon atoms or an alkenyl group with 2-10 carbon atoms.

[0022] In some examples, the lower limit content of the compound represented by Formula II in the liquid crystal composition, by mass percentage, includes 0, 1%, 10%, 20%, and 30%, and the upper limit content of the compound represented by Formula II is selected from 20%, 30%, 40%, 50%, and 60%.

[0023] In some specific examples, the content of the compound represented by Formula II in the liquid crystal composition, by mass percentage, includes, but is not limited to, 0-60%, 1-60%, 1-50%, 1-40%, 1-30%, 1-20%, 10-50%, 10-40%, 10-30%, 10-20%, 20-50%, 20-40%, 20-30%, 30-50%, 30-40%, etc.

[0024] In some examples, the liquid crystal composition further comprises one or more compounds represented by Formula III. III in, express , , , or ; R5 and R6 each independently represent an alkyl group having 1-10 carbon atoms, an alkoxy group having 1-10 carbon atoms, or an alkenyl group having 2-10 carbon atoms, wherein one or more unconnected -CH2- groups may optionally be substituted with cyclopropyl, cyclopentyl, or cyclobutyl. X1 and X2 can each independently represent H or F, but X1 and X2 cannot both represent F at the same time; m represents 1, 2, or 3; when m represents 2 or 3... They are either the same or different independently; n represents 0 or 1.

[0025] In some more specific examples, the compound represented by Formula III is selected from the group consisting of the compounds shown below III-1 to III-10. Ⅲ-1 Ⅲ-2 Ⅲ-3 Ⅲ-4 Ⅲ-5 Ⅲ-6 Ⅲ-7 Ⅲ-8 Ⅲ-9 Ⅲ-10.

[0026] In some more specific examples, the compound represented by formula III is preferably selected from at least one of the compounds represented by formulas III-1, III-2, III-3, III-4, III-5 and III-6.

[0027] In some examples, the lower limit content of the compound represented by Formula III in the liquid crystal composition, by mass percentage, is selected from 0, 1%, 5%, 10%, 20%, and the upper limit content of the compound represented by Formula III is selected from 10%, 20%, 25%, 30%, 40%, 50%.

[0028] In some examples, the content of the compound represented by Formula III in the liquid crystal composition, by mass percentage, includes, but is not limited to, 0, 1-25%, 1-20%, 1-10%, 10-30%, 10-20%, etc.

[0029] In some examples, the polar compound is selected from the group consisting of compounds represented by Formula IV and Formula V. IV V in, and Each represents independently , , , , , , , , , or ; and Each represents independently , , , or ; R7, R8, and R9 each independently represent an alkyl group having 1-10 carbon atoms, an alkoxy group having 1-10 carbon atoms, or an alkenyl group having 2-10 carbon atoms, wherein one or more unconnected -CH2- groups may optionally be substituted with cyclopropyl, cyclopentyl, or cyclobutyl. Y1 represents -F, -Cl, -CF3, -CHF2, or -OCF3; Z1 indicates a single bond. CH2CH2 , CF2O , OCF2 , CH2O , OCH2 , COO or OCO ; Z2 indicates a single bond. CH2CH2 , CH2O , OCH2 , COO or OCO ; p and q can each independently represent 1, 2, or 3; when p represents 2 or 3, They are independently the same or different; when q represents 2 or 3, They are either the same or different independently; x and y can each independently represent 0, 1, or 2; when x represents 2, They are independently the same or different; when y represents 2, They are either the same or different independently.

[0030] In some specific examples, the compound represented by Formula IV is selected from the group consisting of compounds represented by Formulas IV-1 and IV-2 below. IV-1 IV-2 and Each represents independently , , , , , , , , or ; express , , , or ; express , , or ; X3 and X4 each independently represent H or F; Z3 indicates a single bond. CH2CH2 , CH2O , OCH2 , COO or OCO ; 'a' represents 1, 2, or 3; when 'a' represents 2 or 3... They are either the same or different independently; b and c can each independently represent 1 or 2; when b represents 2, Each can be independently the same or different; when c represents 2, They are either the same or different independently; d represents 0 or 1.

[0031] In some more specific examples, the compound represented by formula IV-1 is selected from the group consisting of compounds represented by formulas IV-1-1 to IV-1-19. IV-1-1 IV-1-2 IV-1-3 IV-1-4 IV-1-5 IV-1-6 IV-1-7 IV-1-8 IV-1-9 IV-1-10 IV-1-11 IV-1-12 IV-1-13 IV-1-14 IV-1-15 IV-1-16 IV-1-17 IV-1-18 Ⅳ-1-19.

[0032] In some more specific examples, the compound represented by formula IV-2 is selected from the group consisting of compounds represented by formulas IV-2-1 to IV-2-25. IV-2-1 IV-2-2 IV-2-3 IV-2-4 IV-2-5 IV-2-6 IV-2-7 IV-2-8 IV-2-9 IV-2-10 IV-2-11 IV-2-12 IV-2-13 IV-2-14 IV-2-15 IV-2-16 IV-2-17 IV-2-18 IV-2-19 IV-2-20 IV-2-21 IV-2-22 IV-2-23 IV-2-24 IV-2-25.

[0033] In some examples, the lower limit content of the compound represented by Formula IV in the liquid crystal composition, by mass percentage, is selected from 0, 1%, 5%, 10%, 20%, and the upper limit content of the compound represented by Formula IV is selected from 5%, 10%, 20%, 30%.

[0034] In some more specific examples, the content of the compound represented by Formula IV in the liquid crystal composition, by mass percentage, includes, but is not limited to, 0, 1-30%, 1-20%, 1-10%, 1-5%, 5-30%, 5-20%, 10-30%, 20-30%, etc.

[0035] In some examples, the compound represented by formula V is selected from the group consisting of compounds represented by formulas V-1 to V-16. V-1 V-2 V-3 V-4 V-5 V-6 V-7 V-8 V-9 V-10 V-11 V-12 V-13 V-14 V-15 V-16.

[0036] In some examples, the lower limit content of the compound represented by Formula V in the liquid crystal composition, by mass percentage, is selected from 0, 1%, 10%, 20%, 30%, 40%, 45%, 50%, and the upper limit content of the compound represented by Formula V is selected from 10%, 20%, 30%, 40%, 60%, 80%.

[0037] In some examples, the content of the compound represented by Formula V in the liquid crystal composition, by mass percentage, includes, but is not limited to, 0, 1-80%, 1-60%, 1-30%, 1-20%, 1-10%, 10-80%, 10-60%, 10-30%, 10-20%, 20-80%, 20-60%, 30-60%, 45-60%, etc.

[0038] In some examples, the liquid crystal composition further comprises one or more compounds of formula VI. VI; and / or The liquid crystal composition further comprises one or more compounds of formula VII. VII; and / or The liquid crystal composition further comprises one or more compounds of formula VIII. VIII; and / or in, , , and Each represents independently , , , , or ; R 10 R 11 Each of the following can independently represent an alkyl group having 1-10 carbon atoms, an alkoxy group having 1-10 carbon atoms, or an alkenyl group having 2-10 carbon atoms, wherein one or more unconnected -CH2- groups may optionally be substituted with cyclopropyl, cyclopentyl, or cyclobutyl groups. R 12 R 15 Each of the following can independently represent an alkyl group having 1-10 carbon atoms, an alkenyl group having 2-10 carbon atoms, or an alkoxy group having 1-10 carbon atoms, wherein one or more unconnected -CH2- groups may optionally be substituted with cyclopropyl, cyclopentyl, or cyclobutyl, and any one or more hydrogen atoms may optionally be substituted with fluorine atoms. R 13 and R 16Each can independently represent H, F, alkyl with 1-10 carbon atoms, alkoxy with 1-10 carbon atoms, or alkenyl with 2-10 carbon atoms; R 14 and R 17 Each of the following can independently represent H, F, an alkyl group having 1-10 carbon atoms, an alkoxy group having 1-10 carbon atoms, or an alkenyl group having 2-10 carbon atoms, wherein any one or more hydrogen atoms may be optionally substituted with fluorine atoms; Z2 indicates a single bond. CH2CH2 , CH2O , OCH2 , COO or OCO ; W1 represents -O-, -S-, -CH2O-, or -CH=CH-; W2 and W3 each independently represent -O- or -S-.

[0039] In some more specific examples, the compound represented by formula VI is selected from the group consisting of compounds represented by formulas VI-1 to VI-14 below. VI-1 VI-2 VI-3 VI-4 VI-5 VI-6 VI-7 VI-8 VI-9 VI-10 VI-11 VI-12 VI-13 VI-14.

[0040] In some examples, the lower limit content of the compound represented by Formula VI in the liquid crystal composition, by mass percentage, is selected from 0, 1%, and 2%, and the upper limit content of the compound represented by Formula VI is selected from 10% and 20%.

[0041] In some examples, the content of the compound represented by Formula VI in the liquid crystal composition, by mass percentage, includes, but is not limited to, 0%, 1-20%, 1-10%, 2-10%, etc.

[0042] In some more specific examples, the compound represented by formula VII is selected from the group consisting of compounds represented by formulas VII-1 to VII-12 below. VII-1 VII-2 VII-3 VII-4 VII-5 VII-6 VII-7 VII-8 VII-9 VII-10 VII-11 VII-12.

[0043] In some examples, the lower limit content of the compound represented by Formula VII in the liquid crystal composition, by mass percentage, is selected from 0, 1%, and 2%, and the upper limit content of the compound represented by Formula VII is selected from 12% and 15%.

[0044] In some examples, the content of the compound represented by formula VII in the liquid crystal composition, by mass percentage, includes, but is not limited to, 0%, 1-15%, 2-12%, etc. In some more specific examples, the compound represented by formula VIII is selected from the group consisting of compounds represented by formulas VIII-1 to VIII-4 below. VIII-1 VIII-2 VIII-3 VIII-4.

[0045] In some examples, the lower limit content of the compound represented by Formula VIII in the liquid crystal composition, by mass percentage, is selected from 0, 1%, and 2%, and the upper limit content of the compound represented by Formula VIII is selected from 5%, 10%, and 15%.

[0046] In some specific examples, the content of the compound represented by formula VIII in the liquid crystal composition, by mass percentage, includes, but is not limited to, 0%, 1-15%, 1-10%, 1-5%, etc.

[0047] In some preferred embodiments, the liquid crystal composition comprises, by weight percentage: 1-30% of one or more compounds represented by Formula I, 1-50% of one or more compounds represented by formula II, 20-60% of one or more compounds represented by formula V, and / or 1-20% of one or more compounds of formula VI.

[0048] In some preferred embodiments, the liquid crystal composition comprises, by weight percentage: 1-30% of one or more compounds represented by Formula I, 1-50% of one or more compounds represented by formula II, 1-40% of one or more compounds represented by formula III, 20-60% of one or more compounds represented by formula V, and / or 1-20% of one or more compounds of formula VI.

[0049] In some preferred embodiments, the liquid crystal composition comprises, by weight percentage: 1-30% of one or more compounds represented by Formula I, 1-50% of one or more compounds represented by formula II, 1-50% of one or more compounds represented by formula III, 5-30% of one or more compounds represented by formula IV, and / or 1-15% of one or more compounds represented by formula VII, and / or 1-15% of one or more compounds represented by formula VIII.

[0050] In some preferred embodiments, the liquid crystal composition comprises, by weight percentage: 1-30% of one or more compounds represented by Formula I, 1-50% of one or more compounds represented by formula II, 1-40% of one or more compounds represented by formula III, 1-10% of one or more compounds represented by formula IV, 20-60% of one or more compounds represented by formula V, and / or 1-20% of one or more compounds of formula VI.

[0051] In some preferred embodiments, the liquid crystal composition comprises, by weight percentage: 1-30% of one or more compounds represented by Formula I, 1-50% of one or more compounds represented by formula II, 1-50% of one or more compounds represented by formula III, 5-30% of one or more compounds represented by formula IV, and / or 1-20% of one or more compounds of formula V, and / or 1-10% of one or more compounds of formula VI.

[0052] Various functional additives may be added to the liquid crystal composition provided in this embodiment, wherein the mass percentage of each additive is relative to the total mass of all liquid crystal compounds excluding the additives. The mass percentage of exemplary additives is preferably between 0.01-2 wt%. These additives are mainly chiral agents, antioxidants, light stabilizers, polymerizable monomers, self-aligning agents, etc.

[0053] Exemplary antioxidant and light stabilizer additives are selected from the following compounds:

[0054]

[0055] Exemplary polymerizable monomer additives are selected from the following compounds:

[0056]

[0057] .

[0058] According to yet another embodiment of the present invention, a liquid crystal display device is provided, comprising a liquid crystal panel as described in the first embodiment above.

[0059] Example The technical solution of the present invention will be described below with reference to some specific embodiments.

[0060] In this invention, the preparation methods are all conventional unless otherwise specified, and the raw materials used can be obtained from publicly available commercial sources unless otherwise specified. The reaction process is generally monitored by TLC. The post-reaction treatment generally includes water washing, extraction, drying after combining organic phases, solvent removal under reduced pressure, recrystallization, and column chromatography. Those skilled in the art can implement this invention according to the following description.

[0061] All percentages in this instruction manual refer to mass percentages, and temperatures are in degrees Celsius (°C). The specific meanings of other symbols and test conditions are as follows: Tni represents the liquid crystal clearing point (°C), measured by DSC quantitative method; Δn represents optical anisotropy, Δn = n e -n o , where n oLet n be the refractive index of ordinary light. e The refractive index of unusual light was measured at 25±2℃, 589nm, using an Abbe refractometer. Δε represents dielectric anisotropy, Δε = ε ∥ -ε ⊥ , where ε ∥ ε is the dielectric constant parallel to the molecular axis. ⊥ The dielectric constant is perpendicular to the molecular axis. The test conditions are 25±0.5℃, 20-micron vertical or parallel cell, and INSTEC:ALCT-IR1 test. γ1 represents rotational viscosity (mPa·s), and the test conditions are 25±0.5℃, 20-micron vertical or parallel cell, INSTEC:ALCT-IR1 test; K 11 K is the elastic constant of the development. 33 The bending elastic constant is determined by the following test conditions: 25℃, INSTEC:ALCT-IR1, and a 20-micron vertical or parallel box. The preparation method of the liquid crystal composition is as follows: Weigh each liquid crystal monomer according to a certain ratio and put it into a stainless steel beaker. Place the stainless steel beaker containing each liquid crystal monomer on a magnetic stirrer and heat it to melt. After most of the liquid crystal monomer in the stainless steel beaker has melted, add a magnetic rotor to the stainless steel beaker and stir the mixture evenly. After cooling to room temperature, the liquid crystal composition is obtained.

[0062] The method for fabricating the liquid crystal display device (i.e., a single-sided anchored FFS panel) in the embodiments of the present invention is as follows: A liquid crystal composition is poured into a test cell (the test cell has a polyimide alignment layer on the TFT side and no polyimide alignment layer on the CF side; the cell thickness is 3.3 μm; the substrate surface has ITO electrodes and no passivation layer. The polyimide alignment layer on the TFT side of the test cell undergoes horizontal alignment treatment; the CF side of the test cell does not have a polyimide alignment layer and therefore does not require alignment treatment). Anchoring force test method: The liquid crystal composition is poured into the test cell, and polarizers are attached to both sides. The initial cell twist angle θ1 is tested. After aging at 60℃ for 24 hours, the twist angle θ2 after aging is tested. The magnitude of the change in twist angle (Δθ=θ2-θ1) can measure the strength of the anchoring force. The larger Δθ is, the weaker the anchoring force; the smaller Δθ is, the stronger the anchoring force and the lower the dark state brightness. Test equipment: Optipro.

[0063] Dark-state brightness test method: The liquid crystal composition is poured into the test cell, and polarizers are attached to both sides. The brightness value of the cell without power is measured and recorded at 0V. The alignment effect is evaluated by comparing the dark-state brightness of different liquid crystal compositions. Test equipment: DMS505.

[0064] The liquid crystal monomer structure in the embodiments of the present invention is represented by code. The code representation methods of liquid crystal ring structure, end group and linking group are shown in Table 1 and Table 2 below.

[0065] Table 1. Corresponding codes for ring structures

[0066] Table 2. Correspondence codes between terminal groups and linking groups

[0067] For example: Its code is COY-3-O2; Its code is PP-5-3; Its code is CY-3-O2; Its code is CC-Cp-V1; Its code is PGP-Cpr1-2.

[0068] The following provides different values ​​of Tni, Δn, Δε, and K for liquid crystal compositions with negative dielectric anisotropy. 11 Examples of liquid crystal compositions: Example 1 The formulation and physical properties of the liquid crystal composition in Example 1 are shown in Table 3 below.

[0069] Table 3 Formulation and physical properties of the liquid crystal composition in Example 1

[0070] Example 2 The formulation and physical properties of the liquid crystal composition in Example 2 are shown in Table 4 below.

[0071] Table 4 Formulation and physical properties of the liquid crystal composition in Example 2

[0072] Example 3 The formulation and physical properties of the liquid crystal composition in Example 3 are shown in Table 5 below.

[0073] Table 5 Formulation and physical properties of the liquid crystal composition in Example 3

[0074] Example 4 The formulation and physical properties of the liquid crystal composition in Example 4 are shown in Table 6 below.

[0075] Table 6 Formulation and physical properties of the liquid crystal composition in Example 4

[0076] Example 5 The formulation and physical properties of the liquid crystal composition in Example 5 are shown in Table 7 below.

[0077] Table 7 Formulation and physical properties of the liquid crystal composition in Example 5

[0078] Example 6 The formulation and physical properties of the liquid crystal composition in Example 6 are shown in Table 8 below.

[0079] Table 8 Formulation and physical properties of the liquid crystal composition in Example 6

[0080] Examples 7-10 The formulations and physical properties of the liquid crystal compositions in Examples 7-10 are shown in Table 9 below.

[0081] Table 9 Comparison of Liquid Crystal Composition Formulations and Physical Properties in Examples 7-10

[0082] Comparative Example 1 The formulation and physical properties of the liquid crystal composition of Comparative Example 1 are shown in Table 10 below.

[0083] Table 10 Comparative Example 1: Liquid Crystal Composition Formulation and Physical Properties

[0084] Comparative Example 2 The formulation and physical properties of the liquid crystal composition of Comparative Example 2 are shown in Table 11 below.

[0085] Table 11 Comparative Example 2: Liquid Crystal Composition Formulation and Physical Properties

[0086] Comparative Example 3 The formulation and physical properties of the liquid crystal composition of Comparative Example 3 are shown in Table 12 below.

[0087] Table 12 Comparative Example 3 Liquid Crystal Composition Formulation and Physical Properties

[0088] Comparative Example 4 The formulation and physical properties of the liquid crystal composition of Comparative Example 4 are shown in Table 13 below.

[0089] Table 13 Comparative Example 4: Liquid Crystal Composition Formulation and Physical Properties

[0090] Comparative Example 5 The formulation and physical properties of the liquid crystal composition of Comparative Example 5 are shown in Table 14 below.

[0091] Table 14 Comparative Example 5 Liquid Crystal Composition Formulation and Physical Properties

[0092] Comparative Example 6 The formulation and physical properties of the liquid crystal composition of Comparative Example 6 are shown in Table 15 below.

[0093] Table 15. Formulation and physical properties of liquid crystal compositions in Comparative Example 6

[0094] The torsion angle variation and dark-state brightness results of the liquid crystal compositions obtained in the above embodiments and comparative examples are shown in Table 16.

[0095] Table 16. Comparison data on the twist angle change and dark-state brightness of the liquid crystal compositions in the examples and comparative examples.

[0096] By comparing the data from Examples 1-6 and Comparative Examples 1-6 above, it can be seen that in liquid crystal compositions with negative dielectric anisotropy, while ensuring that Δε and Δn of the liquid crystal composition remain essentially unchanged, K 11 Under conditions of small fluctuations (thus ensuring that the driving voltage and brightness of the liquid crystal display remain unchanged), the liquid crystal composition provided by the present invention has a small change in twist angle and a low dark state brightness.

[0097] By comparing the data from Examples 1 and 7-10 above, it can be seen that in liquid crystal compositions with negative dielectric anisotropy, while ensuring that Δε and Δn of the liquid crystal composition remain essentially unchanged, K 11 Under conditions of small fluctuations (thus ensuring that the driving voltage and brightness of the liquid crystal display remain unchanged), within a certain range of addition, the more compounds represented by Formula I in the liquid crystal composition, the smaller the change in the twist angle and the lower the dark state brightness.

[0098] For liquid crystal compositions with positive dielectric anisotropy, different values ​​of Tni, Δn, Δε and K are provided. 11 Examples of liquid crystal compositions: Example 11 The formulation and physical properties of the liquid crystal composition in Example 11 are shown in Table 17 below.

[0099] Table 17 Formulation and physical properties of the liquid crystal composition in Example 11

[0100] Example 12 The formulation and physical properties of the liquid crystal composition in Example 12 are shown in Table 18 below.

[0101] Table 18 Formulation and physical properties of the liquid crystal composition in Example 12

[0102] Example 13 The formulation and physical properties of the liquid crystal composition in Example 13 are shown in Table 19 below.

[0103] Table 19 Formulation and physical properties of the liquid crystal composition in Example 13

[0104] Example 14 The formulation and physical properties of the liquid crystal composition in Example 14 are shown in Table 20 below.

[0105] Table 20 Formulation and physical properties of the liquid crystal composition in Example 14

[0106] Example 15 The formulation and physical properties of the liquid crystal composition in Example 15 are shown in Table 21 below.

[0107] Table 21 Formulation and physical properties of the liquid crystal composition in Example 15

[0108] Example 16 The formulation and physical properties of the liquid crystal composition in Example 16 are shown in Table 22 below.

[0109] Table 22 Formulation and physical properties of the liquid crystal composition in Example 16

[0110] Examples 17-20 The formulations and physical properties of the liquid crystal compositions in Examples 17-20 are shown in Table 23 below.

[0111] Table 23 Comparison of Liquid Crystal Composition Formulations and Physical Properties in Examples 17-20

[0112] Comparative Example 7 The formulation and physical properties of the liquid crystal composition of Comparative Example 7 are shown in Table 24 below.

[0113] Table 24 Formulation and physical properties of liquid crystal compositions in Comparative Example 7

[0114] Comparative Example 8 The formulation and physical properties of the liquid crystal composition of Comparative Example 8 are shown in Table 25 below.

[0115] Table 25 Formulation and physical properties of liquid crystal compositions in Comparative Example 8

[0116] Comparative Example 9 The formulation and physical properties of the liquid crystal composition of Comparative Example 9 are shown in Table 26 below.

[0117] Table 26 Formulation and physical properties of the liquid crystal composition of Comparative Example 9

[0118] Comparative Example 10 The formulation and physical properties of the liquid crystal composition of Comparative Example 10 are shown in Table 27 below.

[0119] Table 27 Formulation and physical properties of liquid crystal compositions in Comparative Example 10

[0120] Comparative Example 11 The formulation and physical properties of the liquid crystal composition of Comparative Example 11 are shown in Table 28 below.

[0121] Table 28 Formulation and physical properties of liquid crystal compositions in Comparative Example 11

[0122] Comparative Example 12 The formulation and physical properties of the liquid crystal composition of Comparative Example 12 are shown in Table 29 below.

[0123] Table 29 Comparative Example 12: Liquid Crystal Composition Formulation and Physical Properties

[0124] The torsion angle variation and dark state brightness results of the liquid crystal compositions obtained in Examples 11 to 20 and Comparative Examples 7 to 12 are shown in Table 30.

[0125] Table 30. Comparison data on the torsion angle change and dark-state brightness of the liquid crystal compositions in the examples and comparative examples.

[0126] By comparing the data from Examples 11-16 and Comparative Examples 7-12 above, it can be seen that in liquid crystal compositions with positive dielectric anisotropy, while ensuring that Δε and Δn of the liquid crystal composition remain essentially unchanged, K 11 Under conditions of small fluctuations (thus ensuring that the driving voltage and brightness of the liquid crystal display remain unchanged), the liquid crystal composition provided by the present invention has a small change in twist angle and a low dark state brightness.

[0127] By comparing the data from Examples 11 and 17-20 above, it can be seen that in liquid crystal compositions with positive dielectric anisotropy, while ensuring that Δε and Δn of the liquid crystal composition remain essentially unchanged, K 11 Under conditions of small fluctuations (thus ensuring that the driving voltage and brightness of the liquid crystal display remain unchanged), the more compounds represented by Formula I are contained in the technical solution of the present invention, the smaller the change in the twist angle and the lower the dark state brightness.

[0128] The dark-state brightness comparison results of display panels prepared using the liquid crystal composition shown in Example 11 and the liquid crystal composition shown in Comparative Example 7 (two display panels were prepared respectively) are as follows: Figure 1 As shown in the figure, the dark-state brightness of the FFS cell prepared by the technical solution of this invention is significantly lower than that of the comparative example.

[0129] Figure 2 The voltage-transmittance (VT) curves of a conventional double-sided anchored FFS panel and the single-sided anchored FFS panel described in this invention were compared at 25°C. The liquid crystal compositions used with both panels were the liquid crystal compositions shown in Example 11. As the driving voltage increased, the light transmittance of the liquid crystal panel increased, and the light transmittance reached its maximum value (Trmax) when the driving voltage was Vmax.

[0130] from Figure 2 As can be seen, with the same liquid crystal composition, the maximum transmittance (Tr max) of the single-sided anchored FFS panel of the present invention is higher than that of the conventional FFS panel, which is 1.1 times that of the conventional panel; at the same time, the driving voltage Vmax of the single-sided anchored FFS panel of the present invention is 2.5V lower than that of the conventional FFS panel.

[0131] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A liquid crystal panel, the liquid crystal panel comprising an array substrate and a color filter substrate of paired cells, and a liquid crystal layer disposed between the array substrate and the color filter substrate, characterized in that, The surface of the array substrate in contact with the liquid crystal layer is coated with a polyimide alignment layer, while the surface of the color filter substrate in contact with the liquid crystal layer is not coated with a polyimide alignment layer. The liquid crystal layer is prepared from a liquid crystal composition, wherein the liquid crystal composition contains: One or more compounds represented by Formula I, Ⅰ Wherein, R1 and R2 each independently represent an alkyl group having 1-10 carbon atoms or an alkenyl group having 2-10 carbon atoms, wherein one or more unconnected -CH2- groups may optionally be substituted with cyclopropylene, cyclopentylene, or cyclobutylene; and One or more polar compounds.

2. The liquid crystal panel according to claim 1, characterized in that, The liquid crystal composition further comprises one or more compounds represented by Formula II. Ⅱ Wherein, R3 and R4 each independently represent an alkyl group having 1-10 carbon atoms or an alkenyl group having 2-10 carbon atoms; and / or The liquid crystal composition further comprises one or more compounds represented by Formula III. Ⅲ in, express , , , or ; R5 and R6 each independently represent an alkyl group having 1-10 carbon atoms, an alkoxy group having 1-10 carbon atoms, or an alkenyl group having 2-10 carbon atoms, wherein one or more unconnected -CH2- groups may optionally be substituted with cyclopropyl, cyclopentyl, or cyclobutyl. X1 and X2 can each independently represent H or F, but X1 and X2 cannot both represent F at the same time; m represents 1, 2, or 3; when m represents 2 or 3... They are either the same or different independently; n represents 0 or 1.

3. The liquid crystal panel according to claim 1 or 2, characterized in that, The polar compound is selected from the group consisting of compounds represented by Formula IV and Formula V. Ⅳ Ⅴ in, and Each represents independently , , , , , , , , , or ; and Each represents independently , , , or ; R7, R8, and R9 each independently represent an alkyl group having 1-10 carbon atoms, an alkoxy group having 1-10 carbon atoms, or an alkenyl group having 2-10 carbon atoms, wherein one or more unconnected -CH2- groups may optionally be substituted with cyclopropyl, cyclopentyl, or cyclobutyl. Y1 represents -F, -Cl, -CF3, -CHF2, or -OCF3; Z1 indicates a single bond. CH2CH2 , CF2O , OCF2 , CH2O , OCH2 , COO or OCO ; Z2 indicates a single bond. CH2CH2 , CH2O , OCH2 , COO or OCO ; p and q can each independently represent 1, 2, or 3; when p represents 2 or 3, They are independently the same or different; when q represents 2 or 3, They are either the same or different independently; x and y can each independently represent 0, 1, or 2; when x represents 2, They are independently the same or different; when y represents 2, They are either the same or different independently.

4. The liquid crystal panel according to claim 3, characterized in that, The compound represented by Formula IV is selected from the group consisting of compounds represented by Formula IV-1 and Formula IV-2. Ⅳ-1 Ⅳ-2 in, and Each represents independently , , , , , , , , or ; express , , , or ; express , , or ; X3 and X4 each independently represent H or F; Z3 indicates a single bond. CH2CH2 , CH2O , OCH2 , COO or OCO ; 'a' represents 1, 2, or 3; when 'a' represents 2 or 3... They are either the same or different independently; b and c can each independently represent 1 or 2; when b represents 2, Each can be independently the same or different; when c represents 2, They are either the same or different independently; d represents 0 or 1.

5. The liquid crystal panel according to claim 4, characterized in that, The compound represented by formula IV-1 is selected from the group consisting of compounds represented by formulas IV-1-1 to IV-1-19. Ⅳ-1-1 Ⅳ-1-2 Ⅳ-1-3 Ⅳ-1-4 Ⅳ-1-5 Ⅳ-1-6 Ⅳ-1-7 Ⅳ-1-8 Ⅳ-1-9 Ⅳ-1-10 Ⅳ-1-11 Ⅳ-1-12 Ⅳ-1-13 Ⅳ-1-14 Ⅳ-1-15 Ⅳ-1-16 Ⅳ-1-17 Ⅳ-1-18 IV-1-19; and / or The compound represented by formula IV-2 is selected from the group consisting of compounds represented by formulas IV-2-1 to IV-2-25. Ⅳ-2-1 Ⅳ-2-2 Ⅳ-2-3 Ⅳ-2-4 Ⅳ-2-5 Ⅳ-2-6 Ⅳ-2-7 Ⅳ-2-8 Ⅳ-2-9 Ⅳ-2-10 Ⅳ-2-11 Ⅳ-2-12 Ⅳ-2-13 Ⅳ-2-14 Ⅳ-2-15 Ⅳ-2-16 Ⅳ-2-17 Ⅳ-2-18 Ⅳ-2-19 Ⅳ-2-20 Ⅳ-2-21 Ⅳ-2-22 Ⅳ-2-23 Ⅳ-2-24 Ⅳ-2-25。 6. The liquid crystal panel according to claim 3, characterized in that, The compound represented by formula V is selected from the group consisting of compounds represented by formulas V-1 to V-16. Ⅴ-1 Ⅴ-2 Ⅴ-3 Ⅴ-4 Ⅴ-5 Ⅴ-6 Ⅴ-7 Ⅴ-8 Ⅴ-9 Ⅴ-10 Ⅴ-11 Ⅴ-12 Ⅴ-13 Ⅴ-14 Ⅴ-15 Ⅴ-16。 7. The liquid crystal panel according to claim 1 or 2, characterized in that, The liquid crystal composition further comprises one or more compounds represented by formula VI. VI; and / or The liquid crystal composition further comprises one or more compounds represented by formula VII. VII; and / or The liquid crystal composition further comprises one or more compounds represented by formula VIII. Ⅷ in, , , and Each represents independently , , , , or ; R 10 R 11 Each of the following can independently represent an alkyl group having 1-10 carbon atoms, an alkoxy group having 1-10 carbon atoms, or an alkenyl group having 2-10 carbon atoms, wherein one or more unconnected -CH2- groups may optionally be substituted with cyclopropyl, cyclopentyl, or cyclobutyl groups. R 12 R 15 Each of the following can independently represent an alkyl group having 1-10 carbon atoms, an alkenyl group having 2-10 carbon atoms, or an alkoxy group having 1-10 carbon atoms, wherein one or more unconnected -CH2- groups may optionally be substituted with cyclopropyl, cyclopentyl, or cyclobutyl, and any one or more hydrogen atoms may optionally be substituted with fluorine atoms. R 13 and R 16 Each can independently represent H, F, alkyl with 1-10 carbon atoms, alkoxy with 1-10 carbon atoms, or alkenyl with 2-10 carbon atoms; R 14 and R 17 Each of the following can independently represent H, F, an alkyl group having 1-10 carbon atoms, an alkoxy group having 1-10 carbon atoms, or an alkenyl group having 2-10 carbon atoms, wherein any one or more hydrogen atoms may be optionally substituted with fluorine atoms; W1 represents -O-, -S-, -CH2O-, or -CH=CH-; W2 and W3 each independently represent -O- or -S-.

8. The liquid crystal panel according to claim 1, characterized in that, The content of the compound represented by Formula I in the liquid crystal composition is 1-50% by mass percentage.

9. The liquid crystal panel according to claim 2, characterized in that, Based on mass percentage, the liquid crystal composition contains, The content of the compound shown in Formula II is 1-50%, and / or The content of the compound shown in Formula III is 1-50%.

10. A liquid crystal display device, characterized in that, Including the liquid crystal panel as described in any one of claims 1-9.

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