High-transmittance liquid crystal composition containing dibenzo derivative and display device thereof

Abstract

The invention relates to a high-transmittance liquid crystal composition containing a dibenzo derivative and a display device of the high-transmittance liquid crystal composition, and belongs to the field of liquid crystal materials. The high-transmittance liquid crystal composition comprises at least one compound with a structure as shown in a general formula I, at least one compound as shown in a general formula II, at least one compound as shown in a general formula C, at least one compound as shown in a general formula N and at least one compound as shown in a general formula F. The liquid crystal composition disclosed by the invention has relatively good transmittance; the liquid crystal composition has good contrast and fast response speed, and has high application value in liquid crystal displays in TN, IPS or FFS display modes.

Description

Technical Field

[0001] This invention relates to a high-transparency liquid crystal composition and its application, specifically to a high-transparency liquid crystal composition containing dibenzo derivatives and its display device, belonging to the field of liquid crystal materials. Background Technology

[0002] Since their discovery, liquid crystal molecules, with their unique optical and electrical properties, have been widely used in various display modes. By applying different voltages, the rotation angle of the liquid crystal molecules can be controlled, thereby obtaining different transmittances. Transmittance is an important indicator for evaluating liquid crystal display devices. Especially in recent years, as people's requirements for the performance of liquid crystal display devices have continued to increase, so have their requirements for resolution and other aspects. With the continuous development of technologies such as 4K and 8K, the requirements for the transmittance of liquid crystal display devices are constantly increasing, especially for large-size display devices and gaming displays, where the requirements are even higher.

[0003] Due to differences in driving methods and liquid crystal molecule characteristics, traditional liquid crystal displays (LCDs) often suffer from low transmittance, high threshold voltage, and slow response time, leading to driving difficulties and image ghosting. This is particularly noticeable for gaming displays with stringent response time requirements, thus necessitating a liquid crystal material with high transmittance and rapid response. For positive FFS and IPS modes, transmittance is directly proportional to the ε⊥ / Δε ratio. Currently, there are two main methods to improve transmittance: one is to increase the vertical dielectric ε⊥ while keeping Δε constant, thereby increasing the ε⊥ / Δε ratio and thus improving transmittance; the other method is to increase the elastic constant of the liquid crystal composition, improving the system's order and reducing light leakage, thus increasing transmittance. Currently, the main technology for increasing ε⊥ is by adding negative dielectric monomers to positive dielectric liquid crystal components. However, adding negative monomers slows down the response speed and reduces reliability. In currently available data, either ε⊥ is not large enough, or when ε⊥ is large, the K value is not large enough, making it difficult to meet the required response speed. Summary of the Invention

[0004] In view of some shortcomings of current high-transmittance liquid crystal compositions, the present invention provides a liquid crystal composition doped with negative monomers, which has the advantages of large ε⊥, large K value and high transmittance.

[0005] To address the shortcomings of existing technologies, this invention provides a liquid crystal composition and a liquid crystal display device comprising dibenzo-derived and dioxane-derived compounds, wherein the compound represented by general formula I has a dibenzofuran / dibenzothiophene main structure, exhibits high dielectric negativity and a large K value, and also possesses -O(CH2). a (CF2) b (CH2)c The OR2 end group further enhances the dielectric properties of the compound and reduces its rotational viscosity, thereby lowering the rotational viscosity of the liquid crystal mixture. Simultaneously, it exhibits good miscibility with dioxane derivatives in the system, increasing the low-temperature stability of the compound in the liquid crystal mixture. The liquid crystal composition, while maintaining appropriate optical anisotropy, a suitable clearing point, appropriate dielectric anisotropy, and an appropriate low-temperature storage time, also possesses a large vertical dielectric, a large vertical dielectric to dielectric ratio, a large elastic constant, good transmittance, and a short response time. Liquid crystal display devices containing this composition are particularly suitable for TN, IPS, or FFS liquid crystal display modes.

[0006] The liquid crystal composition of this invention, containing compounds of general formulas I, II, and C, also includes dibenzo-derived compounds, dioxane derivatives, and dicyclohexane compounds. The liquid crystal composition of this invention exhibits high clearing point, large optical anisotropy, large dielectric anisotropy, low rotational viscosity, high dielectric constant ε⊥ perpendicular to the molecular axis, a high ratio of perpendicular dielectric to dielectric constant ε⊥ / Δε, and a high average elastic constant Kave. This solves the problems of low transmittance and slow response in liquid crystal displays, resulting in high transmittance and fast response.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A high-transmittance liquid crystal composition comprising a dibenzo-derived compound, comprising at least one compound with the structure shown in general formula I:

[0009]

[0010] Wherein, R1 represents an alkyl group with 1-12 carbon atoms, an alkoxy group with 1-12 carbon atoms, an alkenyl group with 2-12 carbon atoms, or an alkenyloxy group with 2-12 carbon atoms;

[0011] R2 indicates an alkyl group with 1-12 carbon atoms;

[0012] j, k, and m represent integers from 1 to 8 respectively;

[0013] Y1 and Y2 can be independently represented as F, -CF3, or -OCF3;

[0014] X represents O or S;

[0015] At least one compound represented by general formula II shall be used as the second component:

[0016]

[0017] In this context, rings B1 and B2 are represented independently of each other.

[0018] R B1 Represents an alkyl group with 1-12 carbon atoms, an alkoxy group with 1-12 carbon atoms, or an alkenyl group with 2-12 carbon atoms; R B2 It represents alkyl with 1-12 carbon atoms, alkoxy with 1-12 carbon atoms, alkenyl with 2-12 carbon atoms, -F, -CF3 or -OCF3;

[0019] L B1 , L B2 , L B3 , L B4 Each can be represented independently as H, F, Cl, CH3, or CF3;

[0020] Z B1 , Z B2 , Z B3 Each can independently represent -CH2CH2-, -CH=CH-, -CF2O-, -OCF2-, -CH2O-, -OCH2-, -CO-O-, -C2F4-, -CF=CF-, or CC single bonds;

[0021] a and b each represent 0 or 1 independently;

[0022] At least one compound represented by general formula C serves as the third component:

[0023]

[0024] Among them, R C1 R C2 Each of the following can be independently represented as an alkyl group with 1-12 carbon atoms, an alkoxy group with 1-12 carbon atoms, or an alkenyl group with 2-12 carbon atoms;

[0025] At least one compound represented by general formula N serves as the fourth component:

[0026]

[0027] Among them, R N1 R N2 Each of the following can be independently represented as an alkyl group with 1-12 carbon atoms, an alkoxy group with 1-12 carbon atoms, or an alkenyl group with 2-12 carbon atoms;

[0028] Independent representations of rings N1, N2, and N3 and At most one H can be replaced by F;

[0029] Z N1 , Z N2Each can independently represent a C / C single bond, -CH2CH2-, -CF2O-, -OCF2-, -CH2O-, -OCH2-, -CO-O-, -C2F4-, or -CF=CF-;

[0030] f and g each independently represent 0, 1, or 2;

[0031] And at least one compound represented by general formula F as the fifth component:

[0032]

[0033] In this context, rings A1 and A2 are represented independently of each other. One or more H's on the surface can be replaced by F;

[0034] R 21 R represents an alkyl group with 1-12 carbon atoms, an alkoxy group with 1-12 carbon atoms, or an alkenyl group with 2-12 carbon atoms. 22 The following can represent alkyl groups with 1-12 carbon atoms, alkoxy groups with 1-12 carbon atoms, alkenyl groups with 2-12 carbon atoms, F, Cl, OCF3, or CF3;

[0035] L 21 , L 22 Each can be represented independently as F, Cl, CH3, or CF3;

[0036] Z 21 This indicates a C / C single bond, -CH2CH2-, -CF2O-, -OCF2-, -CH2O-, -OCH2-, -CO-O-, -C2F4-, or -CF=CF-;

[0037] h represents 0, 1, or 2.

[0038] The content of the compound represented by formula I is 1-20% by mass percentage, the content of the compound represented by formula II is 1-20%, the content of the compound represented by formula C is 1-60%, the content of the compound represented by formula N is 1-60%, and the content of the compound represented by formula F is 1-60%.

[0039] Furthermore, the liquid crystal compound represented by general formula I is preferably a compound with the structural formula of general formula IA and / or IB:

[0040]

[0041] Where j, k, and m represent integers from 1 to 5, and other groups are the same as in general formula I.

[0042] Furthermore, the liquid crystal compound represented by general formula IA is preferably one or more of the following compounds IA-1 to IA-21:

[0043]

[0044]

[0045]

[0046] The liquid crystal compound represented by general formula IB is preferably one or more of the following compounds IB-1 to IB-21:

[0047]

[0048]

[0049]

[0050] In some embodiments of the present invention, the compound represented by general formula I accounts for 1-20% of the total weight of the liquid crystal composition, for example 1%, 2%, 4%, 6%, 8%, 10%, 12%, 14%, 16%, 18%, 20%, etc.

[0051] In some embodiments of the present invention, the compound represented by general formula II is selected from one or more of the group consisting of compounds II-A to II-G:

[0052]

[0053] Furthermore, compound II is selected from one or more of the following compounds II-1 to II-28:

[0054]

[0055]

[0056] In the liquid crystal composition of the present invention, the lower limit of the weight percentage of the compound represented by general formula II is 1%, 1.5%, 2%, 3% or 4%; the upper limit of the weight percentage of the compound represented by general formula II is 20%, 18%, 16%, 14%, 12%, 10%, 8% or 6%.

[0057] In some embodiments of the present invention, preferably, the compound represented by general formula C is selected from one or more of the following compounds C-1 to C-18:

[0058]

[0059] In the liquid crystal compositions of the present invention, the lower limit of the weight percentage of the compound represented by general formula C is 1%, 1.5%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 12%, 14%, 16%, 20%, 22%, 24%, or 26%; and the upper limit of the weight percentage of the compound represented by general formula C is 60%, 58%, 56%, 54%, 52%, 50%, 48%, 45%, 40%, 38%, 35%, 30%, 28%, 26%, 24%, 20%, 18%, 16%, 15%, 14%, 12%, or 10%.

[0060] Furthermore, the compound represented by general formula N is selected from one or more of the following compounds N-1 to N-60:

[0061]

[0062]

[0063]

[0064] In the liquid crystal compositions of the present invention, the lower limit of the weight percentage of the compound represented by general formula N is 1%, 1.5%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 12%, 14%, 16%, 20%, 22%, 24%, or 26%; and the upper limit of the weight percentage of the compound represented by general formula N is 60%, 58%, 56%, 54%, 52%, 50%, 48%, 45%, 40%, 38%, 35%, 30%, 28%, 26%, 24%, 20%, 18%, 16%, 15%, 14%, 12%, or 10%.

[0065] Furthermore, the compound represented by general formula F is selected from one or more of the following compounds F-1 to F-30:

[0066]

[0067]

[0068]

[0069]

[0070]

[0071] In the liquid crystal compositions of the present invention, the lower limit of the weight percentage of the compound represented by general formula F is 1%, 1.5%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 12%, 14%, 16%, 20%, 22%, 24%, or 26%; and the upper limit of the weight percentage of the compound represented by general formula F is 60%, 58%, 56%, 54%, 52%, 50%, 48%, 45%, 40%, 38%, 35%, 30%, 28%, 26%, 24%, 20%, 18%, 16%, 15%, 14%, 12%, or 10%.

[0072] Furthermore, one or more compounds represented by general formula E are added to the liquid crystal mixture:

[0073]

[0074] Among them, R E1 R E2 Each represents C1-C independently. 12 Alkyl or C1-C 12 alkoxy groups; wherein, C1-C 12 Alkyl or C1-C 12 At least one hydrogen atom in the alkoxy group can be independently substituted by a halogen, C1-C 12 Alkyl or C1-C 12 One of the -CH2- or at least two non-adjacent -CH2- groups in the alkoxy group can be independently replaced by -O-, -CH=CH-, -C≡C-, -CO-O- or -O-CO- in a non-directly connected manner;

[0075] X1 and X2 each represent -F or -CF3 independently;

[0076] The content of the compound represented by general formula E, by mass percentage, is 1-10% of the total liquid crystal mixture.

[0077] In some embodiments of the present invention, the compound represented by general formula E is selected from one or more of the following compounds E-1 to E-40:

[0078]

[0079]

[0080]

[0081] In the liquid crystal composition of the present invention, the weight percentage of the compound represented by general formula E is preferably 1-6%, more preferably 1-5%.

[0082] Furthermore, the liquid crystal mixture also contains one or more dielectric negative compounds represented by general formula M:

[0083]

[0084] Among them, R M1 R M2 Each of the three elements (M1, M2, and M3) independently represents an alkyl group or an alkoxy group with 1-12 carbon atoms; each of the three rings (M1, M2, and M3) independently represents...

[0085] Z M1 , Z M2 Each can independently represent a C / C single bond, -CH2CH2-, -CF2O-, -OCF2-, -CH2O-, -OCH2-, -CO-O-, -C2F4-, or -CF=CF-;

[0086] r, s, and t represent 0, 1, or 2.

[0087] The compound represented by general formula M accounts for 1-20% of the total liquid crystal mixture by mass percentage.

[0088] Compounds of general formula M are selected from one or more of the following compounds:

[0089]

[0090] Among them, R M1 R M2 Each of the above can be independently represented as an alkyl group or an alkoxy group with 1-12 carbon atoms.

[0091] In the liquid crystal composition of the present invention, the lower limit of the weight percentage of the compound of general formula M is 1%, 1.5%, 2%, 3%, 4%, 5%, 6%, 7%, 8% or 10%; and the upper limit of the weight percentage of the compound of general formula M is 20%, 18%, 16%, 15%, 14%, 12% or 11%.

[0092] On the other hand, the liquid crystal composition provided by the present invention also contains one or more additives known to those skilled in the art and described in the literature, such as stabilizers. One or more stabilizers may also be added to the liquid crystal mixture, wherein the stabilizer content is 0.001-5% by mass.

[0093] For example, one or more stabilizers with the following structures can be added to the liquid crystal mixture of the present invention:

[0094]

[0095]

[0096]

[0097]

[0098] Preferably, the stabilizer is selected from one or more stabilizers with the following structures:

[0099]

[0100] In stabilizers, n represents an integer from 1 to 8.

[0101] In embodiments of the present invention, the stabilizer accounts for 0.001-5% of the total weight of the liquid crystal composition; more preferably, the stabilizer accounts for 0.001-1% of the total weight of the liquid crystal composition; as a particularly preferred embodiment, the stabilizer accounts for 0.01-0.2% of the total weight of the liquid crystal composition.

[0102] Another aspect of the invention provides a liquid crystal composition that further comprises one or more additives known to those skilled in the art and described in the literature. For example, 0.001-15% by weight of multicolor dyes and / or chiral dopants may be added.

[0103] The following are possible dopants that are preferably added to the mixture according to the invention:

[0104]

[0105]

[0106] The liquid crystal composition of the present invention can be used to prepare liquid crystal display devices, including ECB, TN, IPS, and FFS mode liquid crystal display devices. The liquid crystal composition of the present invention is more preferably used to prepare IPS and FFS mode liquid crystal display devices.

[0107] Advantages of this invention:

[0108] This invention provides a liquid crystal composition doped with a negative monomer, the liquid crystal composition having ε ⊥ It has the advantages of large K value and high transmittance. The liquid crystal composition of the present invention has good low-temperature miscibility, shortened response time, and good high-temperature reliability.

[0109] Compared with the prior art, the liquid crystal composition provided by the present invention, while maintaining appropriate optical anisotropy, appropriate clearing point, appropriate dielectric anisotropy, and appropriate low-temperature storage time, also has a larger vertical dielectric, a larger ratio of vertical dielectric to dielectric, a larger elastic constant, better transmittance, and shorter response time. This makes the liquid crystal display device containing the liquid crystal composition have better transmittance, better contrast, and faster response speed while maintaining an appropriate operating temperature range and appropriate low-temperature storage stability. It has high application value in liquid crystal displays of TN, IPS, or FFS display modes. Detailed Implementation

[0110] For ease of explanation, in the following embodiments, the group structures of the liquid crystal compositions are represented by the codes listed in Table 1.

[0111] Table 1. Group structure codes of liquid crystal compounds

[0112]

[0113]

[0114] Take the following compound as an example:

[0115]

[0116] Represented by the code in Table 1, it is 3PGP2.

[0117] For example:

[0118]

[0119] It is represented as 3CPWO2.

[0120] The abbreviated codes for the test items in the following examples are as follows:

[0121] Cp (°C): Clearing point (nematic-isotropic phase transition temperature);

[0122] Δn: Refractive index anisotropy (589 nm, 25 °C);

[0123] Δε: Dielectric anisotropy (1kHz, 25℃);

[0124] γ1: Represents the rotational viscosity [mPa·s] measured at 25℃;

[0125] Where, Δε=ε || -ε ⊥ , where ε || ε is the dielectric constant parallel to the molecular axis, and ε⊥ is the dielectric constant perpendicular to the molecular axis. Test conditions: 25℃, 1KHz;

[0126] K11: Warp elastic constant;

[0127] K33: Bending elastic constant;

[0128] Kave: Average value of elastic constant.

[0129] Comparative Example 1: Mixture D1 was prepared according to the compounds and weight percentages listed in Table 2. It was filled between the two substrates of the liquid crystal display for performance testing. The composition and test data of mixture D1 are shown in Table 2 below.

[0130] Table 2 Composition and properties of mixture D1

[0131]

[0132]

[0133] Example 1:

[0134] Mixture M1 was prepared according to the compounds and weight percentages listed in Table 3. It was filled between the two substrates of the liquid crystal display for performance testing. The composition and test data of mixture M1 are shown in Table 3 below.

[0135] Table 3 Composition and properties of mixture M1

[0136]

[0137] Comparative Example 2: Mixture D2 was prepared according to the compounds and weight percentages listed in Table 4. It was filled between the two substrates of the liquid crystal display for performance testing. The composition and test data of mixture D2 are shown in Table 4 below.

[0138] Table 4 Composition and properties of mixture D2

[0139]

[0140]

[0141] Example 2:

[0142] Mixture M2 was prepared according to the compounds and weight percentages listed in Table 5. It was filled between the two substrates of the liquid crystal display for performance testing. The composition and test data of mixture M2 are shown in Table 5 below.

[0143] Table 5 Composition and properties of mixture M2

[0144]

[0145] Comparative Example 3: Mixture D3 was prepared according to the compounds and weight percentages listed in Table 6. It was filled between the two substrates of the liquid crystal display for performance testing. The composition and test data of mixture D3 are shown in Table 6 below.

[0146] Table 6 Composition and properties of mixture D3

[0147]

[0148]

[0149] Example 3:

[0150] Mixture M3 was prepared according to the compounds and weight percentages listed in Table 7. It was then filled between the two substrates of the liquid crystal display for performance testing. The composition and test data of mixture M3 are shown in Table 7 below.

[0151] Table 7 Composition and properties of mixture M3

[0152]

[0153] Example 4:

[0154] Mixture M4 was prepared according to the compounds and weight percentages listed in Table 8. It was filled between the two substrates of the liquid crystal display for performance testing. The composition and test data of mixture M4 are shown in Table 8 below.

[0155] Table 8 Composition and properties of mixture M4

[0156]

[0157] Example 5:

[0158] Mixture M5 was prepared according to the compounds and weight percentages listed in Table 9. It was filled between the two substrates of the liquid crystal display for performance testing. The composition and test data of mixture M5 are shown in Table 9 below.

[0159] Table 9 Composition and properties of mixture M5

[0160]

[0161] Example 6:

[0162] Mixture M6 was prepared according to the compounds and weight percentages listed in Table 10. It was filled between the two substrates of the liquid crystal display for performance testing. The composition and test data of mixture M6 are shown in Table 10 below.

[0163] Table 10 Composition and properties of mixture M6

[0164]

[0165] Example 7:

[0166] Mixture M7 was prepared according to the compounds and weight percentages listed in Table 11. It was filled between the two substrates of the liquid crystal display for performance testing. The composition and test data of mixture M7 are shown in Table 11 below.

[0167] Table 11 Composition and properties of mixture M7

[0168]

[0169]

[0170] As can be seen from the comparison between Comparative Examples 1-3 and Examples 1-7, compared with the prior art's technical solution of using conventional negative liquid crystal compounds to improve the transmittance of positive liquid crystal compositions, the compound containing the dibenzo derivative shown in General Formula I of the present invention and the liquid crystal compound containing dioxane shown in General Formula II have a higher dielectric constant ε⊥ perpendicular to the molecular axis and a higher ratio of perpendicular dielectric to dielectric ε⊥ / Δε, while maintaining the optical anisotropy Δn, clearing point Cp, and dielectric anisotropy Δε at a stable level. Therefore, a significant improvement is achieved in terms of transmittance. In addition, the liquid crystal composition of the present invention also has a lower rotational viscosity γ1, thus simultaneously possessing the technical effects of fast response and high contrast.

[0171] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A high-transmittance liquid crystal composition comprising a dibenzo-p-derived compound, characterized in that: Compounds comprising at least one structure of general formula I: Wherein, R1 represents an alkyl group with 1-12 carbon atoms, an alkoxy group with 1-12 carbon atoms, an alkenyl group with 2-12 carbon atoms, or an alkenyloxy group with 2-12 carbon atoms; R2 indicates an alkyl group with 1-12 carbon atoms; j, k, and m represent integers from 1 to 8 respectively; Y1 and Y2 can be independently represented as F, -CF3, or -OCF3; X represents O or S; At least one compound represented by general formula II: In this context, rings B1 and B2 are represented independently of each other. R B1 Represents an alkyl group with 1-12 carbon atoms, an alkoxy group with 1-12 carbon atoms, or an alkenyl group with 2-12 carbon atoms; R B2 It represents alkyl with 1-12 carbon atoms, alkoxy with 1-12 carbon atoms, alkenyl with 2-12 carbon atoms, -F, -CF3 or -OCF3; L B1 L B2 L B3 L B4 Each can be represented independently as H, F, Cl, CH3, or CF3; Z B1 Z B2 Z B3 Each can independently represent -CH2CH2-, -CH=CH-, -CF2O-, -OCF2-, -CH2O-, -OCH2-, -CO-O-, -C2F4-, -CF=CF-, or CC single bonds; a and b each represent 0 or 1 independently; At least one compound represented by general formula C: Among them, R C1 R C2 Each of the following can be independently represented as an alkyl group with 1-12 carbon atoms, an alkoxy group with 1-12 carbon atoms, or an alkenyl group with 2-12 carbon atoms; At least one compound represented by general formula N: Among them, R N1 R N2 Each of the following can be independently represented as an alkyl group with 1-12 carbon atoms, an alkoxy group with 1-12 carbon atoms, or an alkenyl group with 2-12 carbon atoms; Independent representations of rings N1, N2, and N3 and At most one H can be replaced by F; Z N1 Z N2 Each can independently represent a C / C single bond, -CH2CH2-, -CF2O-, -OCF2-, -CH2O-, -OCH2-, -CO-O-, -C2F4-, or -CF=CF-; f and g each independently represent 0, 1, or 2; And at least one compound represented by general formula F: In this context, rings A1 and A2 are represented independently of each other. One or more H's on the surface can be replaced by F; R 21 R represents an alkyl group with 1-12 carbon atoms, an alkoxy group with 1-12 carbon atoms, or an alkenyl group with 2-12 carbon atoms. 22 The following can represent alkyl groups with 1-12 carbon atoms, alkoxy groups with 1-12 carbon atoms, alkenyl groups with 2-12 carbon atoms, F, Cl, OCF3, or CF3; L 21 L 22 Each can be represented independently as F, Cl, CH3, or CF3; Z 21 This indicates a C / C single bond, -CH2CH2-, -CF2O-, -OCF2-, -CH2O-, -OCH2-, -CO-O-, -C2F4-, or -CF=CF-; h represents 0, 1, or 2; The content of the compound represented by formula I is 1-20% by mass percentage, the content of the compound represented by formula II is 1-20%, the content of the compound represented by formula C is 1-60%, the content of the compound represented by formula N is 1-60%, and the content of the compound represented by formula F is 1-60%.

2. The high-transmittance liquid crystal composition containing dibenzo-p-derived compounds according to claim 1, characterized in that: The liquid crystal compound represented by general formula I is a compound with the structural formula of general formula IA and / or IB: Where j, k, and m represent integers from 1 to 5 respectively.

3. The high-transmittance liquid crystal composition containing dibenzo-p-derived compounds according to claim 2, characterized in that: The liquid crystal compound represented by general formula IA is one or more of compounds IA-1 to IA-21: The liquid crystal compound represented by the general formula IB is one or more of compounds IB-1 to IB-21:

4. The high-transmittance liquid crystal composition containing dibenzo-p-derived compounds according to claim 1, characterized in that: The compound represented by general formula II is selected from one or more compounds II-A to II-G:

5. The high-transmittance liquid crystal composition containing dibenzo-p-derived compounds according to claim 1, characterized in that: The liquid crystal mixture further comprises one or more compounds represented by general formula E: Among them, R E1 R E2 Each represents C1-C independently. 12 Alkyl or C1-C 12 alkoxy groups; wherein, C1-C 12 Alkyl or C1-C 12 At least one hydrogen atom in the alkoxy group can be independently substituted by a halogen, C1-C 12 Alkyl or C1-C 12 One of the -CH2- or at least two non-adjacent -CH2- groups in the alkoxy group can be independently replaced by -O-, -CH=CH-, -C≡C-, -CO-O- or -O-CO- in a non-directly connected manner; X1 and X2 each represent -F or -CF3 independently; The content of the compound represented by general formula E is 1-10% by mass percentage.

6. The high-transmittance liquid crystal composition containing dibenzo-p-derived compounds according to claim 1 or 5, characterized in that: The liquid crystal mixture further comprises one or more dielectric negative compounds represented by general formula M: Among them, R M1 R M2 Each of the above can be independently represented as an alkyl group or an alkoxy group with 1-12 carbon atoms; The rings M1, M2, and M3 are each represented independently of each other. Z M1 Z M2 Each can independently represent a C / C single bond, -CH2CH2-, -CF2O-, -OCF2-, -CH2O-, -OCH2-, -CO-O-, -C2F4-, or -CF=CF-; r, s, and t represent 0, 1, or 2. The content of the compound represented by general formula M is 1-20% by mass percentage.

7. The high-transmittance liquid crystal composition comprising dibenzo-p-derived compounds according to claim 6, characterized in that: Compounds of general formula M are selected from one or more of the following compounds: Among them, R M1 R M2 Each of the above can be independently represented as an alkyl group or an alkoxy group with 1-12 carbon atoms.

8. The high-transmittance liquid crystal composition comprising dibenzo-derived compounds according to any one of claims 1-7, characterized in that: The liquid crystal mixture further comprises one or more stabilizers, wherein the stabilizer content is 0.001-5% by mass.

9. The high-transmittance liquid crystal composition comprising a dibenzo-derived compound according to any one of claims 1-7, characterized in that: The liquid crystal composition further comprises 0.001-15% by mass of multicolor dyes and / or chiral dopants.

10. A liquid crystal display device, characterized in that: The liquid crystal display device is prepared using the high-transmittance liquid crystal composition containing dibenzo derivatives as described in any one of claims 1-9; the liquid crystal display device includes liquid crystal display devices in ECB, TN, IPS and FFS modes.

Images