CN113428005B - Automobile full-liquid crystal instrument panel with high reliability - Google Patents
Automobile full-liquid crystal instrument panel with high reliability Download PDFInfo
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- CN113428005B CN113428005B CN202110635700.8A CN202110635700A CN113428005B CN 113428005 B CN113428005 B CN 113428005B CN 202110635700 A CN202110635700 A CN 202110635700A CN 113428005 B CN113428005 B CN 113428005B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 39
- 150000001875 compounds Chemical class 0.000 claims abstract description 51
- 239000000203 mixture Substances 0.000 claims abstract description 22
- 239000012769 display material Substances 0.000 claims abstract description 13
- 239000000654 additive Substances 0.000 claims abstract description 12
- 230000000996 additive effect Effects 0.000 claims abstract description 11
- LMBFAGIMSUYTBN-MPZNNTNKSA-N teixobactin Chemical compound C([C@H](C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CO)C(=O)N[C@H](CCC(N)=O)C(=O)N[C@H]([C@@H](C)CC)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CO)C(=O)N[C@H]1C(N[C@@H](C)C(=O)N[C@@H](C[C@@H]2NC(=N)NC2)C(=O)N[C@H](C(=O)O[C@H]1C)[C@@H](C)CC)=O)NC)C1=CC=CC=C1 LMBFAGIMSUYTBN-MPZNNTNKSA-N 0.000 claims abstract description 4
- 125000004432 carbon atom Chemical group C* 0.000 claims description 55
- 125000003545 alkoxy group Chemical group 0.000 claims description 27
- 125000000217 alkyl group Chemical group 0.000 claims description 27
- 125000003342 alkenyl group Chemical group 0.000 claims description 16
- 239000000758 substrate Substances 0.000 claims description 13
- 239000004642 Polyimide Substances 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 238000005286 illumination Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 8
- 210000004027 cell Anatomy 0.000 description 7
- 238000002834 transmittance Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000004990 Smectic liquid crystal Substances 0.000 description 2
- 210000002858 crystal cell Anatomy 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 101100112111 Caenorhabditis elegans cand-1 gene Proteins 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/42—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
- C09K19/54—Additives having no specific mesophase characterised by their chemical composition
- C09K19/542—Macromolecular compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Liquid Crystal Substances (AREA)
Abstract
The invention discloses an automobile full-liquid crystal instrument panel, which comprises a liquid crystal box, wherein the liquid crystal box is filled with a VA-mode display material and consists of a main mixture and an additive; the host mixture comprises at least one compound of formula I, a compound of formula II, a compound of formula III, a compound of formula IV, and a compound of formula V; the additive is selected from the group consisting of compounds of formula VIII. The instrument panel has better low-temperature stability and shorter low-temperature response time; and meanwhile, the device has high reliability for ultraviolet illumination.
Description
Technical Field
The invention belongs to the technical field of intelligent instrument panels, and particularly relates to an automobile full-liquid crystal instrument panel with high reliability.
Background
With the rapid development of economy and the improvement of the living standard of people, automobiles have become the main transportation means of ordinary families. As a device for reflecting the operation conditions of various systems of an automobile, an automobile instrument panel is one of the most commonly contacted automobile parts. Conventionally, the rotation speed, the water temperature, the oil quantity and the speed per hour are displayed by a mechanical instrument panel. The mechanical instrument panel has the characteristics of stable technology, maturity and reliability.
However, in recent years, due to the rapid development of automobile, communication and display technologies, more intuitive and modern display devices are required to meet the demands of instant messaging, navigation and entertainment of people, so that all-liquid-crystal dashboards are desired. The novel instrument panel is applied to automobiles to replace the traditional mechanical instrument panel by the characteristics of light weight, low power consumption and colored flowers, realizes a digital display function and is used for displaying the average oil consumption, the instantaneous oil consumption, the outdoor temperature, the average speed, the driving time, the driving mileage, the navigation and the multimedia entertainment of the automobiles. The full liquid crystal instrument panel is safer in driving; the display effect is better, and the sense of science and technology is stronger.
As a liquid crystal display device of an automobile instrument panel, display modes such as TN (twisted nematic), STN (super twisted nematic) and VA (vertical alignment) are more commonly used. The TN and STN display modes have short response times and wide operating temperatures, but the contrast and viewing angle are not ideal. VA display mode has the characteristics of a wide viewing angle and a high contrast ratio, but is easy to crystallize or to develop a smectic phase at a low temperature, while the low temperature response time is slightly long.
On the other hand, the VA display mode display material is required to meet certain reliability requirements, especially reliability against ultraviolet light, which is closely related to the service life of the automobile instrument panel.
Accordingly, there is a strong need to provide an automobile all-liquid-crystal instrument panel with high reliability against the above-mentioned drawbacks of the prior art.
Disclosure of Invention
The invention aims to provide an automobile full-liquid crystal instrument panel with high reliability. Compared with the prior art, the automobile full-liquid-crystal instrument panel has better low-temperature stability and shorter low-temperature response time; and meanwhile, the device has high reliability for ultraviolet illumination.
In order to solve the technical problems, the invention adopts the following technical scheme: an automobile full-liquid crystal instrument panel comprises an upper substrate, a lower substrate and a liquid crystal box clamped between the upper substrate and the lower substrate, wherein polyimide PI alignment layers are arranged on the inner surfaces of the upper substrate and the lower substrate, and the liquid crystal box is filled with a display material in a VA mode; wherein the display material consists of a main mixture and an additive; the host mixture comprises at least one compound of formula I, at least one compound of formula II, at least one compound of formula III, at least one compound of formula IV, and at least one compound of formula V,
wherein R is 1 And R is 2 Each independently represents an alkyl or alkoxy group of 1 to 8 carbon atoms, preferably 1 to 6 carbon atoms;
wherein R is 3 Represents alkenyl of 2 to 8 carbon atoms, preferably 2 to 6 carbon atoms; r is R 4 Represents alkyl or alkoxy groups of 1 to 8 carbon atoms, preferably 1 to 6 carbon atoms;
wherein R is 5 And R is 6 Each independently represents an alkyl or alkoxy group of 1 to 8 carbon atoms, preferably 1 to 6 carbon atoms;
wherein R is 7 Represents alkenyl of 2 to 8 carbon atoms, preferably 2 to 6 carbon atoms; r is R 8 Represents alkyl or alkoxy groups of 1 to 8 carbon atoms, preferably 1 to 6 carbon atoms;
wherein R is 9 And R is 10 Each independently represents an alkyl or alkoxy group of 1 to 8 carbon atoms, preferably 1 to 6 carbon atoms;
the additive is selected from the group consisting of compounds of formula X,
wherein m is an integer of 6 to 10.
In the present invention, alkenyl groups are defined as one or more non-adjacent CH' s 2 Alkyl substituted with ch=ch.
The full liquid crystal instrument panel of the automobile, according to the invention, comprises 4-10%, preferably 6-8% of the compound of formula I; the content of the compound of formula II is 2-10%, preferably 4-8%; the content of the compound of formula III is 4-12%, preferably 6-10%; the content of the compound of formula IV is 10-18%, preferably 12-16%; the content of the compounds of the formula V is 4 to 10%, preferably 6 to 8%; based on the total weight of the host mixture.
The full liquid crystal instrument panel of the automobile according to the invention, wherein it further comprises a compound of formula VI,
wherein R is 11 Represents alkenyl of 2 to 8 carbon atoms, preferably 2 to 6 carbon atoms; r is R 12 Represents alkyl or alkoxy groups of 1 to 8 carbon atoms, preferably 1 to 6 carbon atoms; ring A represents
The full liquid crystal instrument panel of the automobile according to the invention, wherein the content of the compound of formula VI is 6-12%, preferably 8-10%; based on the total weight of the host mixture.
The full liquid crystal instrument panel for automobiles according to the present invention, wherein it further comprises a compound of formula VII,
wherein R is 13 Represents alkyl or alkoxy groups of 1 to 8 carbon atoms, preferably 1 to 6 carbon atoms; r is R 14 Represents alkenyl of 2 to 8 carbon atoms, preferably 2 to 6 carbon atoms.
The full liquid crystal instrument panel of the automobile according to the invention, wherein the content of the compound of formula VII is 22-34%, preferably 26-30%; based on the total weight of the host mixture.
The full liquid crystal instrument panel for automobiles according to the present invention, wherein it further comprises a compound of formula VIII,
wherein R is 15 Represents alkenyl of 2 to 8 carbon atoms, preferably 2 to 6 carbon atoms; r is R 16 Represents alkyl or alkoxy groups of 1 to 8 carbon atoms, preferably 1 to 6 carbon atoms.
The full liquid crystal instrument panel of the automobile according to the invention, wherein the content of the compound of formula VIII is 9-18%, preferably 11-15%; based on the total weight of the host mixture.
The full liquid crystal instrument panel for automobiles according to the present invention, wherein it further comprises a compound of formula IX,
wherein R is 17 And R is 18 Each independently represents an alkyl or alkoxy group of 1 to 8 carbon atoms, preferably 1 to 6 carbon atoms.
The full liquid crystal instrument panel of the automobile according to the invention, wherein the compound of formula IX has a content of 4-12%, preferably 6-9%; based on the total weight of the host mixture.
The automobile full liquid crystal instrument panel according to the invention, wherein the additive is added in an amount of 0.005-0.2%, preferably 0.01-0.1%; based on the total weight of the host mixture.
In a further preferred embodiment, the display material according to the invention advantageously consists of the compounds of the formulae I to X described above.
The inventors have found that the combination of different monomers in specific proportions and in specific structures, in particular specific cyclic units and side groups, gives a host mixture which is then mixed with additives in the corresponding proportions to give a display material for an all-liquid-crystal dashboard of a motor vehicle, which fills the liquid-crystal cell of the all-liquid-crystal dashboard of a motor vehicle. Compared with the prior art, the liquid crystal box of the automobile full-liquid crystal instrument panel has better low-temperature stability and shorter low-temperature response time; and meanwhile, the device has high reliability for ultraviolet illumination.
Detailed Description
The invention is further described below in conjunction with the detailed description.
It should be understood that the description of the specific embodiments is merely illustrative of the principles and spirit of the invention, and not in limitation thereof. Further, it should be understood that various changes, substitutions, omissions, modifications, or adaptations to the present invention may be made by those skilled in the art after having read the present disclosure, and such equivalent embodiments are within the scope of the present invention as defined in the appended claims.
In the present invention, all parts are parts by weight unless otherwise specified; all percentages are by weight; cp represents a clearing point in degrees Celsius.
Δn represents the optical anisotropy value at 25℃and 589 nm.
Delta epsilon represents the dielectric anisotropy values obtained for a 6 μm thick VA test cell at 25℃and 1 kHz.
γ1 represents the rotational viscosity (mPas) measured at 25 ℃.
In the present invention, each monomer compound is represented by a three-stage abbreviation of (cyclic unit+linker) +left side group+right side group. Wherein,
linking and pendant groups:
n(O)-＝C n H 2n+1 (O)-；
-(O)n＝-(O)C n H 2n+1 ；
Vn-＝CH 2 ＝CHC n H 2n -；
-nV＝-C n H 2n CH＝CH 2 ；
-V＝-CH＝CH 2 ；
-V-＝-CH＝CH-；
-T-＝-C≡C-；
-1O-＝-CH 2 O-；
-Q-＝-CF 2 O-；
n＝C n H 2n+1 ；
n=natural number;
o represents an oxygen atom.
A ring unit:
(trans configuration).
EXAMPLE 1 host mixture
Δn＝0.103；Δε＝-4.5；Cp＝82.1；γ1＝82。
EXAMPLE 2 host mixture
EXAMPLE 3 host mixture
Further, in order to test the low temperature stability of example 1, a 6 μm thick VA test cell (having polyimide PI alignment layers on the inner surfaces of the upper and lower substrates) for an automobile all-liquid-crystal instrument panel was filled with the host mixture, and it was placed in a refrigerator at-20 ℃ to observe whether crystallization or smectic phase occurred in the VA test cell at regular intervals, and the duration of the low temperature stability, that is, the last time the phase stability was observed (LTS, h) was determined.
On the other hand, the response time (τ, ms) is the sum of the rise time and fall time of the VA test cell at-20deg.C and 6V drive voltage; the former is defined as the time for which the transmittance rises from 10% of the maximum transmittance until 90% is reached; the latter is the time when the transmittance decreases from 90% of the maximum transmittance until reaching 10%.
The results are shown in Table 1.
TABLE 1
| Test box | LTS，h | Response time (τ, ms) |
| Example 1 | >1200h | 12.36 |
It can be seen from Table 1 that the host mixture of example 1 of the present invention not only has better low temperature stability, but also has shorter low temperature response time. On the basis, the liquid crystal cell filled with the host mixture obtained by adding not more than 0.2% of the additive is not substantially changed in the aforementioned properties.
In yet another aspect, the host mixture of example 1 was mixed with the compound of additive formula X (m=8) in an amount of 0.05%, to give the display material of example 1. Then, the display material was filled in the VA test cell described above.
Testing voltage holding ratio VHR at 25℃and 6V voltage, pulse width of 10ms and voltage holding time of 166.7ms ini (%) and the following. In addition, the display material of example 1 was subjected to violet having a wavelength of 365nmThe external lamp was irradiated with 5000mJ energy, and the voltage holding ratio VHR after ultraviolet irradiation was measured uv (％)。
VHR ini And VHR uv The smaller the difference between them, the higher the reliability of the cell filled with display material.
The results are shown in Table 2.
TABLE 2
| Liquid crystal box filled with display material | VHR ini (％) | VHR uv (％) |
| Example 1 | 99.89 | 99.87 |
As can be seen from Table 2, the reliability of the liquid crystal cell of example 1 of the present invention against ultraviolet irradiation is high.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims (3)
1. An automobile full-liquid crystal instrument panel comprises an upper substrate, a lower substrate and a liquid crystal box clamped between the upper substrate and the lower substrate, wherein polyimide PI alignment layers are arranged on the inner surfaces of the upper substrate and the lower substrate, and the liquid crystal box is filled with a display material in a VA mode; wherein the display material consists of a main mixture and an additive; the host mixture comprises at least one compound of formula I, at least one compound of formula II, at least one compound of formula III, at least one compound of formula IV, at least one compound of formula V, at least one compound of formula VI, at least one compound of formulas VII and VIII, and at least one compound of formula IX;
wherein the content of the compound of the formula I is 4-10%; the content of the compound of the formula II is 2-10%; the content of the compound of the formula III is 4-12%; the content of the compound of the formula IV is 10-18%; the content of the compound of formula V is 4-10%; the content of the compound of the formula VI is 6-12%; the content of the compound of formula VII is 22-34%; the content of the compound of formula VIII is 9-18%; the compound of formula IX has a content of 4-12%; the addition amount of the additive is 0.005-0.2%; based on the total weight of the host mixture;
wherein R is 1 And R is 2 Each independently represents an alkyl group of 1 to 8 carbon atoms or an alkoxy group;
wherein R is 3 Represents alkenyl of 2 to 8 carbon atoms; r is R 4 Represents alkyl or alkoxy of 1 to 8 carbon atoms;
wherein R is 5 And R is 6 Each independently represents an alkyl group of 1 to 8 carbon atoms or an alkoxy group;
wherein R is 7 Represents alkenyl of 2 to 8 carbon atoms; r is R 8 Represents alkyl or alkoxy of 1 to 8 carbon atoms;
wherein R is 9 And R is 10 Each independently represents an alkyl group of 1 to 8 carbon atoms or an alkoxy group;
wherein R is 11 Represents alkenyl of 2 to 8 carbon atoms; r is R 12 Represents alkyl or alkoxy of 1 to 8 carbon atoms; ring A represents
Wherein R is 13 Represents alkyl or alkoxy of 1 to 8 carbon atoms; r is R 14 Represents alkenyl of 2 to 8 carbon atoms;
wherein R is 15 Represents alkenyl of 2 to 8 carbon atoms; r is R 16 Represents alkyl or alkoxy of 1 to 8 carbon atoms;
wherein R is 17 And R is 18 Each independently represents an alkyl group of 1 to 8 carbon atomsOr an alkoxy group;
the additive is selected from the group consisting of compounds of formula X,
wherein m is an integer of 6 to 10.
2. The automobile full liquid crystal dashboard of claim 1, wherein:
the content of the compound of the formula I is 6-8%;
the content of the compound of the formula II is 4-8%;
the content of the compound of the formula III is 6-10%;
the content of the compound of the formula IV is 12-16%;
the content of the compound of formula V is 6-8%;
the content of the compound of the formula VI is 8-10%;
the content of the compound of formula VII is 26-30%;
the content of the compound of formula VIII is 11-15%;
the compound of formula IX has a content of 6-9%;
the addition amount of the additive is 0.01-0.1%;
based on the total weight of the host mixture.
3. The automobile full liquid crystal dashboard of claim 1, wherein:
R 1 and R is 2 Each independently represents an alkyl group of 1 to 6 carbon atoms or an alkoxy group; r is R 3 Represents alkenyl of 2 to 6 carbon atoms;
R 4 represents an alkyl or alkoxy group of 1 to 6 carbon atoms;
R 5 and R is 6 Each independently represents an alkyl group of 1 to 6 carbon atoms or an alkoxy group; r is R 7 Represents alkenyl of 2 to 6 carbon atoms;
R 8 represents an alkyl or alkoxy group of 1 to 6 carbon atoms;
R 9 and R is 10 Each independently representsAlkyl or alkoxy groups of 1 to 6 carbon atoms; r is R 11 Represents alkenyl of 2 to 6 carbon atoms;
R 12 represents an alkyl or alkoxy group of 1 to 6 carbon atoms;
R 13 represents an alkyl or alkoxy group of 1 to 6 carbon atoms;
R 14 represents alkenyl of 2 to 6 carbon atoms;
R 15 represents alkenyl of 2 to 6 carbon atoms;
R 16 represents an alkyl or alkoxy group of 1 to 6 carbon atoms;
R 17 and R is 18 Each independently represents an alkyl group or an alkoxy group of 1 to 6 carbon atoms.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110635700.8A CN113428005B (en) | 2021-06-08 | 2021-06-08 | Automobile full-liquid crystal instrument panel with high reliability |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110635700.8A CN113428005B (en) | 2021-06-08 | 2021-06-08 | Automobile full-liquid crystal instrument panel with high reliability |
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| CN113428005B true CN113428005B (en) | 2023-11-07 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05264976A (en) * | 1992-03-19 | 1993-10-15 | Idemitsu Kosan Co Ltd | Display device for instrument |
| JP2002212563A (en) * | 2001-01-23 | 2002-07-31 | Dainippon Ink & Chem Inc | Liquid crystal composition and liquid crystal display element |
| CN105556380A (en) * | 2013-09-20 | 2016-05-04 | Dic株式会社 | Liquid crystal display element and manufacturing method thereof |
| CN112399928A (en) * | 2018-07-25 | 2021-02-23 | 大众汽车股份公司 | Display and operating device for a motor vehicle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10227468A1 (en) * | 2002-06-20 | 2004-01-15 | Bayerische Motoren Werke Ag | Projection system and method |
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2021
- 2021-06-08 CN CN202110635700.8A patent/CN113428005B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05264976A (en) * | 1992-03-19 | 1993-10-15 | Idemitsu Kosan Co Ltd | Display device for instrument |
| JP2002212563A (en) * | 2001-01-23 | 2002-07-31 | Dainippon Ink & Chem Inc | Liquid crystal composition and liquid crystal display element |
| CN105556380A (en) * | 2013-09-20 | 2016-05-04 | Dic株式会社 | Liquid crystal display element and manufacturing method thereof |
| CN112399928A (en) * | 2018-07-25 | 2021-02-23 | 大众汽车股份公司 | Display and operating device for a motor vehicle |
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