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CN108239546B - Liquid crystal display device having a plurality of pixel electrodes - Google Patents

Liquid crystal display device having a plurality of pixel electrodes Download PDF

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Publication number
CN108239546B
CN108239546B CN201611203756.1A CN201611203756A CN108239546B CN 108239546 B CN108239546 B CN 108239546B CN 201611203756 A CN201611203756 A CN 201611203756A CN 108239546 B CN108239546 B CN 108239546B
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liquid crystal
fluorinated
carbon atoms
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compounds
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CN108239546A (en
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刘云云
姚利芳
陈昭远
韩文明
丁文全
贺笛
张鹤鸣
杨亚非
王莉
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Jiangsu Hecheng Display Technology Co Ltd
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    • 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
    • C09K19/44—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40 containing compounds with benzene rings directly linked
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
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    • G02F1/13439—Electrodes characterised by their electrical, optical, physical properties; materials therefor; method of making

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Abstract

A liquid crystal display device comprises an upper substrate, a lower substrate, a color filter, an upper electrode, a lower electrode, an upper orientation film, a lower orientation film and a liquid crystal material, wherein the liquid crystal material layer is clamped between the upper orientation film and the lower orientation film, the lower electrode is a pixel electrode formed by a low-temperature polycrystalline silicon material, liquid crystal molecules in the liquid crystal material are oriented to be generally parallel relative to the upper substrate and the lower substrate when no voltage is applied, the liquid crystal material is a nematic liquid crystal composition, the liquid crystal display device comprises the liquid crystal material with proper refractive index and dielectric anisotropy, lower viscosity and lower threshold voltage, and the liquid crystal display device has the advantages of higher brightness, higher resolution, lower power consumption and better reliability.

Description

Liquid crystal display device having a plurality of pixel electrodes
Technical Field
The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device including low-temperature polysilicon as a pixel electrode layer.
Background
In the field of application of thin film transistor technology (TFT-LCD), although the market has been very large in recent years and the technology has become mature, the demand for display technology has been continuously increasing, particularly in terms of achieving fast response, lowering the driving voltage to reduce power consumption, and the like. The liquid crystal material is one of important photoelectronic materials for liquid crystal displays, and plays an important role in improving the performance of the liquid crystal displays.
There are three major thin film transistor technologies used in liquid crystal screens: Alpha-Si (a-Si, amorphous silicon), IGZO (indium gallium zinc oxide), LTPS (low temperature polysilicon).
Polysilicon (Poly-Si TFT) and amorphous silicon (a-Si TFT) differ in transistor characteristics. The arrangement state of the molecular structure of the polysilicon in one Grain (gain) is neat and directional, so that the electron mobility is 200-300 times faster than that of the disordered amorphous silicon; the TFT-LCD is generally called amorphous silicon, has mature technology and is the mainstream product of the LCD. The polysilicon products mainly include High Temperature Polysilicon (HTPS) and Low Temperature Polysilicon (LTPS). The LTPS-TFT LCD has the advantages of high resolution, high reaction speed, high brightness, high aperture ratio and the like, and in addition, because the silicon crystal arrangement of the LTPS-TFT LCD is ordered compared with a-Si, the electron mobility is relatively higher by more than 100 times, peripheral driving circuits can be simultaneously manufactured on a glass substrate, the goal of system integration is achieved, and the space and the cost of driving an IC are saved. Meanwhile, as the drive IC circuit is directly manufactured on the panel, the external contact points of the assembly can be reduced, the reliability is increased, the maintenance is simpler, the assembly process time is shortened, the EMI characteristic is reduced, and further the design time course of an application system is reduced and the design freedom degree is expanded.
The TFT-LCD is constructed of three layers-two glass substrates sandwiching a layer of liquid crystal: the upper glass substrate is attached to the color filter, and the lower glass substrate is embedded with the thin film transistor. The working principle of the liquid crystal screen is as follows: when the current passes through the transistor on the lower glass substrate, the electric field changes to cause the liquid crystal molecules to deflect, so as to change the polarization of the light, and then the light and shade states of the pixels are determined by utilizing the polaroid. In addition, the upper layer glass is attached to the color filter to form three colors of red, blue, green and the like of each pixel, and the pixels emitting the red, the blue, the green and the like form a video picture on the panel. Common abbreviations such as IPS, TN, VA and the like are not materials of the liquid crystal panel, but an arrangement mode of liquid crystal molecules in a middle layer of a three-layer sandwich of the panel, a visual angle of a liquid crystal screen, a color gamut coverage area and response time of the panel (whether a picture has a smear or not). In the prior art, due to the limitation of carrier mobility, the amorphous silicon tft lcd hardly meets the requirements of lightness, thinness, power saving and high image quality, and the low temperature polysilicon lcd has the advantages of fast image refreshing speed, high brightness, high definition, and the like, so the low temperature polysilicon lcd is becoming the mainstream product of the lcd.
Because the amorphous silicon (a-Si) TFT has physical obstacles such as low resolution and slow response speed, and cannot completely meet the performance requirements of terminal application systems such as car navigation systems, liquid crystal televisions, digital cameras, and the like, the amorphous silicon (a-Si) TFT is also mainly applied to large-size display devices mainly including displays at present. As liquid crystal displays have been developed to have a large capacity, high brightness and high definition, the pixel size has become smaller and the charging time of unit pixels has become shorter, which requires a larger on-state current. In addition, in order to solve the difficulty of high-density wiring, the display region and the peripheral driving circuit must be integrated, which cannot be realized by the conventional process. Compared with amorphous silicon (a-Si TFT), the low-temperature polysilicon (LTPS) screen has higher aperture ratio and electron mobility, namely, higher brightness, higher resolution, lower power consumption and good reliability. Therefore, LTPS-TFT is a necessary development technology for the new generation of LCD.
Disclosure of Invention
The invention aims to provide a liquid crystal display device which comprises a liquid crystal material with proper refractive index and dielectric anisotropy, lower viscosity and lower threshold voltage and has the advantages of higher brightness, higher resolution, lower power consumption and better reliability.
In order to accomplish the above object of the present invention, the present invention provides a liquid crystal display device comprising: the liquid crystal display panel comprises an upper substrate, a lower substrate, a color filter, an upper electrode, a lower electrode, an upper orientation film, a lower orientation film and a liquid crystal material; the liquid crystal display panel comprises a lower electrode, a lower alignment film, a color filter, a pixel electrode, a liquid crystal material and a liquid crystal material, wherein the lower electrode is positioned on a lower substrate, the lower alignment film is positioned on the lower electrode, the liquid crystal material is clamped between the upper alignment film and the lower alignment film, the upper electrode is positioned on the upper alignment film, the color filter is positioned on the upper electrode, the lower electrode is a pixel electrode formed by a low-temperature polycrystalline silicon material, the orientation of liquid crystal molecules in the liquid crystal material is approximately parallel relative to the upper substrate and the lower substrate when no voltage is applied, and the liquid crystal material is a nematic phase liquid crystal composition;
the nematic liquid crystal composition comprises:
1-30% of one or more compounds of formula I based on the total weight of the liquid crystal composition
Figure GDA0001223480560000021
One or more compounds with a general formula II accounting for 1-40% of the total weight of the liquid crystal composition
Figure GDA0001223480560000022
0-30% of one or more compounds of formula III based on the total weight of the liquid crystal composition
Figure GDA0001223480560000031
One or more compounds of the general formula IV accounting for 20-80% of the total weight of the liquid crystal composition
Figure GDA0001223480560000032
Wherein,
the R is1、R4、R5、R6And R7The same or different, each independently represents the number of carbon atoms1-7 fluorinated or non-fluorinated alkyl, 1-7 fluorinated or non-fluorinated alkoxy, or 2-7 fluorinated or non-fluorinated alkenyl;
the R is2represents-F, a fluorinated or non-fluorinated alkyl group having 1 to 7 carbon atoms, a fluorinated or non-fluorinated alkoxy group having 1 to 7 carbon atoms, or a fluorinated or non-fluorinated alkenyl group having 2 to 7 carbon atoms;
the R is3represents-H, a fluorinated or non-fluorinated alkyl group having 1 to 7 carbon atoms, a fluorinated or non-fluorinated alkoxy group having 1 to 7 carbon atoms, or a fluorinated or non-fluorinated alkenyl group having 2 to 7 carbon atoms;
said L1、L3、L4、L5、L6、L7Or L9The same or different, each independently represents-H or-F;
said L8Independently represent-F, -CF3or-OCF3
The ring
Figure GDA0001223480560000033
Independently represent
Figure GDA0001223480560000034
The ring
Figure GDA0001223480560000035
And ring
Figure GDA0001223480560000036
Are the same or different and each independently represents
Figure GDA0001223480560000037
Figure GDA0001223480560000038
Figure GDA0001223480560000039
The above-mentioned
Figure GDA00012234805600000310
One or more of H may be substituted by F;
the ring
Figure GDA00012234805600000311
And ring
Figure GDA00012234805600000312
Are the same or different and each independently represents
Figure GDA00012234805600000313
Figure GDA00012234805600000314
The above-mentioned
Figure GDA00012234805600000315
One or more of H may be substituted by F;
the ring
Figure GDA00012234805600000316
Ring (C)
Figure GDA00012234805600000317
Ring (C)
Figure GDA00012234805600000318
And ring
Figure GDA00012234805600000319
Are the same or different and each independently represents
Figure GDA0001223480560000041
Z is1And Z2The same or different, each independently represents a single bond, -COO-or-CH2O-；
Said a represents 0, 1 or 2, and when a is 2, 2 rings
Figure GDA0001223480560000042
May be the same or different;
d and e are the same or different and each independently represents 0 or 1.
The upper substrate and the lower substrate are independently a rigid transparent substrate or a flexible transparent substrate.
In some embodiments of the present invention, the upper substrate and the lower substrate are independently rigid transparent substrates.
The upper electrode is an indium gallium oxide electrode.
The upper orientation layer and the lower orientation layer are both horizontal orientation layers.
In some embodiments, preferably, the compound of formula I comprises 1-25% by weight of the total liquid crystal composition; the compound of the general formula II accounts for 5-40% of the total weight of the liquid crystal composition; the compound of the general formula III accounts for 0 to 25 percent of the total weight of the liquid crystal composition; the compound of the general formula IV accounts for 20-75% of the total weight of the liquid crystal composition.
In some embodiments, it is further preferred that the compound of formula I comprises from 1 to 20% by weight of the total liquid crystal composition; the compound of the general formula II accounts for 10-40% of the total weight of the liquid crystal composition; the compound of the general formula III accounts for 0 to 25 percent of the total weight of the liquid crystal composition; the compound of the general formula IV accounts for 30-70% of the total weight of the liquid crystal composition.
In some embodiments, it is further preferred that the compound of formula I comprises from 1 to 20% by weight of the total liquid crystal composition; the compound of the general formula II accounts for 15-40% of the total weight of the liquid crystal composition; the compound of the general formula III accounts for 1-25% of the total weight of the liquid crystal composition; the compound of the general formula IV accounts for 30-70% of the total weight of the liquid crystal composition.
In some embodiments, the compound of formula i is selected from one or more of the following structures:
Figure GDA0001223480560000043
Figure GDA0001223480560000051
wherein,
the R is1And R2The same or different, each independently represents a fluorinated or non-fluorinated alkyl group having 1 to 7 carbon atoms, a fluorinated or non-fluorinated alkoxy group having 1 to 7 carbon atoms, or a fluorinated or non-fluorinated alkenyl group having 2 to 7 carbon atoms.
In some embodiments, the compound of formula I-1 comprises 1 to 15% by weight of the total liquid crystal composition.
In some embodiments, preferably, the compound of formula I-1 is selected from one or more of the following structures:
Figure GDA0001223480560000052
Figure GDA0001223480560000061
and
Figure GDA0001223480560000062
in some embodiments, preferably, the compound of formula I-2 is selected from one or more of the following structures:
Figure GDA0001223480560000063
Figure GDA0001223480560000071
Figure GDA0001223480560000081
and
Figure GDA0001223480560000082
in some embodiments, preferably, the compound of formula I-3 is selected from one or more of the following structures:
Figure GDA0001223480560000083
Figure GDA0001223480560000084
and
Figure GDA0001223480560000085
in some embodiments, the compound of formula ii is selected from one or more of the following structures:
Figure GDA0001223480560000091
Figure GDA0001223480560000101
and
Figure GDA0001223480560000102
wherein,
the R is3represents-H, a fluorinated or non-fluorinated alkyl group having 1 to 5 carbon atoms, a fluorinated or non-fluorinated alkoxy group having 1 to 7 carbon atoms, or a fluorinated or non-fluorinated alkenyl group having 2 to 5 carbon atoms.
In some embodiments, the compound of formula II-9 comprises 10 to 25% by weight of the total liquid crystal composition.
In some embodiments, the compound of formula II-11 comprises 5 to 25% by weight of the total liquid crystal composition.
In some embodiments, preferably, the compound of formula ii is selected from one or more of the following structures:
Figure GDA0001223480560000103
Figure GDA0001223480560000111
and
Figure GDA0001223480560000112
wherein,
the R is3represents-H, a fluorinated or non-fluorinated alkyl group having 1 to 5 carbon atoms, a fluorinated or non-fluorinated alkoxy group having 1 to 7 carbon atoms, or a fluorinated or non-fluorinated alkenyl group having 2 to 5 carbon atoms.
In some embodiments, it is particularly preferred that the compound of formula ii is selected from one or more of the following structures:
Figure GDA0001223480560000113
Figure GDA0001223480560000121
and
Figure GDA0001223480560000122
wherein,
the R is3represents-H, carbonA fluorinated or non-fluorinated alkyl group having 1 to 5 carbon atoms, a fluorinated or non-fluorinated alkoxy group having 1 to 7 carbon atoms, or a fluorinated or non-fluorinated alkenyl group having 2 to 5 carbon atoms.
In some embodiments, the compound of formula iii is selected from one or more of the following structures:
Figure GDA0001223480560000123
Figure GDA0001223480560000131
Figure GDA0001223480560000132
and
Figure GDA0001223480560000133
wherein,
the R is5Independently represents a fluorinated or non-fluorinated alkyl group having 1 to 5 carbon atoms, a fluorinated or non-fluorinated alkoxy group having 1 to 5 carbon atoms, or a fluorinated or non-fluorinated alkenyl group having 2 to 5 carbon atoms.
In some embodiments, preferably, the compound of formula III comprises 5 to 25% by weight of the total liquid crystal composition.
In some embodiments, the compound of formula iv is selected from one or more of the group consisting of:
Figure GDA0001223480560000134
Figure GDA0001223480560000141
Figure GDA0001223480560000142
and
Figure GDA0001223480560000143
wherein,
R6and R7The same or different, each independently represents an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkenyloxy group having 2 to 5 carbon atoms.
In some embodiments, preferably, the compound of formula IV-1 comprises 15 to 60% of the total weight of the liquid crystal composition; further preferably; the compound of the general formula IV-1 accounts for 20-55% of the total weight of the liquid crystal composition.
In some embodiments of the present invention, preferably, the compound of formula IV-1 is selected from one or more compounds of the group consisting of:
Figure GDA0001223480560000144
Figure GDA0001223480560000151
Figure GDA0001223480560000152
and
Figure GDA0001223480560000153
wherein,
the R is6Represents an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkenyloxy group having 2 to 5 carbon atoms.
In some embodiments of the present invention, it is particularly preferred that the compound of formula IV-1 is selected from one or more compounds of the group consisting of:
Figure GDA0001223480560000154
and
Figure GDA0001223480560000161
wherein,
the R is6Represents an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkenyloxy group having 2 to 5 carbon atoms.
In some embodiments of the present invention, preferably, the compound of formula IV-2 is selected from one or more compounds of the group consisting of:
Figure GDA0001223480560000162
Figure GDA0001223480560000163
and
Figure GDA0001223480560000164
in some embodiments of the present invention, preferably, the compound of formula IV-3 is selected from one or more compounds of the group consisting of:
Figure GDA0001223480560000165
Figure GDA0001223480560000171
Figure GDA0001223480560000172
and
Figure GDA0001223480560000173
in some embodiments of the present invention, preferably, the compound of formula IV-4 is selected from one or more compounds of the group consisting of:
Figure GDA0001223480560000174
Figure GDA0001223480560000181
and
Figure GDA0001223480560000182
in some embodiments of the present invention, preferably, the compound of formula IV-5 is selected from one or more compounds of the group consisting of:
Figure GDA0001223480560000191
and
Figure GDA0001223480560000201
in some embodiments of the present invention, preferably, the compound of formula IV-6 is selected from one or more compounds of the group consisting of:
Figure GDA0001223480560000202
and
Figure GDA0001223480560000203
in some embodiments of the present invention, preferably, the compound of formula IV-7 is selected from one or more compounds of the group consisting of:
Figure GDA0001223480560000204
and
Figure GDA0001223480560000211
in some embodiments of the present invention, preferably, the compound of formula IV-8 is selected from one or more compounds of the group consisting of:
Figure GDA0001223480560000212
Figure GDA0001223480560000213
and
Figure GDA0001223480560000214
in some embodiments of the present invention, preferably, the compound of formula IV-9 is selected from one or more compounds of the group consisting of:
Figure GDA0001223480560000215
Figure GDA0001223480560000216
and
Figure GDA0001223480560000221
in some embodiments of the present invention, preferably, the compound of formula IV-10 is selected from one or more compounds of the group consisting of:
Figure GDA0001223480560000222
and
Figure GDA0001223480560000223
in some embodiments of the present invention, preferably, the compound of formula IV-11 is selected from one or more compounds of the group consisting of:
Figure GDA0001223480560000224
Figure GDA0001223480560000231
and
Figure GDA0001223480560000232
the stabilizers which may be added to the parent liquid crystals according to the invention are mentioned below, for example.
Figure GDA0001223480560000233
Figure GDA0001223480560000241
Figure GDA0001223480560000251
Figure GDA0001223480560000261
Preferably, the stabilizer is selected from the group consisting of the stabilizers shown below.
Figure GDA0001223480560000262
In an embodiment of the present invention, it is preferred that the stabilizer is 0 to 5% by weight of the total weight of the mother liquid crystal; more preferably, the stabilizer accounts for 0-2% of the total weight of the liquid crystal composition; as a particularly preferred embodiment, the stabilizer is 0.001 to 1% by weight based on the total weight of the liquid crystal composition.
Compared with the prior art, the display device provided by the invention uses low-temperature polycrystalline silicon as the pixel electrode layer, and has the advantages of high resolution, high response speed, high brightness, high aperture ratio, low power consumption and the like by combining the composition provided by the invention.
Drawings
FIG. 1 is a schematic view of a liquid crystal display according to the present invention;
Detailed Description
The shorthand codes of the test items in the examples are shown in Table 1:
TABLE 1
Figure GDA0001223480560000263
Figure GDA0001223480560000271
Wherein the optical anisotropy is measured by an Abbe refractometer under a sodium lamp (589nm) light source at 25 ℃; the dielectric test cell is of the VA type, and the thickness of the cell is 6 mu m.
VHR (initial) was tested using the TOY06254 type liquid crystal physical property evaluation system; pulse voltage: 5V 6HZ, the testing temperature is 60 ℃, and the testing unit period is 166.7 ms.
Vth test conditions: c/1KHZ, JTSB 7.0.
In the following examples, for the convenience of expression of the respective liquid crystal compounds, the group structures of the liquid crystal compounds are represented by the codes listed in Table 2:
TABLE 2 radical structural code of liquid crystal compounds
Figure GDA0001223480560000272
Figure GDA0001223480560000281
Compounds of the following formula are exemplified:
Figure GDA0001223480560000282
the structural formula is represented by the code listed in Table 2, and can be expressed as: nCGUF, wherein n in the code represents the number of carbon atoms of the left alkyl group, for example, n is "2", that is, the alkyl group is-C2H5(ii) a C in the code represents "cyclohexane group", G in the code represents "2-fluoro-14-phenylene ", U in the code stands for" 2, 5-difluoro-1, 4-phenylene ", and F in the code stands for" fluoro substituent ".
In the liquid crystal composition of the present invention, the liquid crystal composition is a nematic liquid crystal composition, and the various liquid crystal components contained in the liquid crystal composition are all compounds known in the art, and can be synthesized by a conventional method by those skilled in the art.
Device embodiments
A liquid crystal display device of the present invention is shown in fig. 1, and comprises: an upper substrate 1, a lower substrate 2, a color filter 3, an upper electrode 4, a lower electrode 5, an upper alignment film 6, a lower alignment film 7, and a liquid crystal material 8; the lower electrode 5 is positioned on the lower substrate 2, the lower alignment film 7 is positioned on the lower electrode 5, the liquid crystal material 8 is clamped between the upper alignment film 6 and the lower alignment film 7, the upper electrode 4 is positioned on the upper alignment film 6, the color filter 3 is positioned on the upper electrode 4, the lower electrode 5 is a pixel electrode formed by a low-temperature polysilicon material, the liquid crystal molecules in the liquid crystal material 8 are aligned to be approximately parallel to the upper substrate 1 and the lower substrate 2 when no voltage is applied, the liquid crystal material 8 is a nematic phase liquid crystal composition,
example 1
The liquid crystal composition of example 1 was prepared according to the compounds and weight percentages listed in table 3, and filled between two substrates of a liquid crystal display for performance testing, and the test data are shown in the following table:
TABLE 3 composition and compounding ratio of liquid crystal composition
Figure GDA0001223480560000283
Figure GDA0001223480560000291
When the liquid crystal composition described in embodiment 1 is poured into the display device of the present invention, the device has advantages of high resolution, fast response speed, high luminance, high aperture ratio, low power consumption, and the like, and particularly has good high temperature reliability.
Example 2
The liquid crystal composition of example 2 was prepared according to the compounds and weight percentages listed in table 4, and filled between two substrates of a liquid crystal display for performance testing, and the test data are shown in the following table:
TABLE 4 composition and compounding ratio of liquid crystal composition
Figure GDA0001223480560000292
When the liquid crystal composition described in embodiment 2 is poured into the display device of the present invention, the device has advantages of high resolution, fast response speed, high luminance, high aperture ratio, low power consumption, and the like, and particularly has good high temperature reliability.
Example 3
The liquid crystal composition of example 3, prepared according to the compounds and weight percentages listed in Table 5, was filled between two substrates of a liquid crystal display for performance testing, and the test data are shown in the following table
TABLE 5 compositions and compounding ratios of liquid crystal compositions
Figure GDA0001223480560000293
Figure GDA0001223480560000301
When the liquid crystal composition described in embodiment 3 is injected into the display device of the present invention, the device has advantages of high resolution, fast response speed, high luminance, high aperture ratio, low power consumption, and the like, and particularly has good high temperature reliability.
Example 4
The liquid crystal composition of example 4 was prepared according to the compounds and weight percentages listed in table 6, and filled between two substrates of a liquid crystal display for performance testing, and the test data are shown in the following table:
TABLE 6 compositions and compounding ratios of liquid crystal compositions
Figure GDA0001223480560000302
The liquid crystal composition described in embodiment 4 is poured into the display device of the present invention, which has advantages of high resolution, fast response speed, high brightness, high aperture ratio, low power consumption, and particularly, has good high temperature reliability.
Example 5
The liquid crystal composition of example 5 was prepared according to the compounds and weight percentages listed in table 7, and filled between two substrates of a liquid crystal display for performance testing, and the test data are shown in the following table:
TABLE 7 compositions and compounding ratios of liquid crystal compositions
Figure GDA0001223480560000303
Figure GDA0001223480560000311
When the liquid crystal composition described in embodiment 1 is poured into the display device of the present invention, the device has advantages of high resolution, fast response speed, high luminance, high aperture ratio, low power consumption, and the like, and particularly has good high temperature reliability.
Example 6
The liquid crystal composition of example 6 was prepared according to the compounds and weight percentages listed in table 8, and filled between two substrates of a liquid crystal display for performance testing, and the test data are shown in the following table:
TABLE 8 compositions and compounding ratios of liquid crystal compositions
Figure GDA0001223480560000312
The liquid crystal composition described in embodiment 6 is poured into the display device of the present invention, which has advantages of high resolution, fast response speed, high luminance, high aperture ratio, low power consumption, and the like, and particularly has good high temperature reliability.
Example 7
The liquid crystal composition of example 7 was prepared according to the compounds and weight percentages listed in table 9, and filled between two substrates of a liquid crystal display for performance testing, and the test data are shown in the following table:
TABLE 9 compositions and compounding ratios of liquid crystal compositions
Figure GDA0001223480560000321
The liquid crystal composition described in embodiment 7 is injected into the display device of the present invention, which has advantages of high resolution, fast response speed, high luminance, high aperture ratio, low power consumption, and particularly, has good high temperature reliability.
Example 8
The liquid crystal composition of example 8 was prepared according to the compounds and weight percentages listed in table 9, and filled between two substrates of a liquid crystal display for performance testing, the test data are shown in the following table:
TABLE 10 compositions and compounding ratios of liquid crystal compositions
Figure GDA0001223480560000322
The liquid crystal composition described in embodiment 8 is injected into the display device of the present invention, which has advantages of high resolution, fast response speed, high luminance, high aperture ratio, low power consumption, and the like, and particularly has good high temperature reliability.
The materials used in the present invention are all commercial materials, and are all commercially available.
The foregoing embodiments have been provided to illustrate the principles and embodiments of the present invention, and the above embodiments are provided only to assist and understand the method and the core idea of the present invention; meanwhile, a person skilled in the art can change the specific mode and the application scope thereof according to the idea of the present invention, and in summary, the information in the description should not be construed as limiting the present invention.

Claims (4)

1. A liquid crystal display device, comprising: the liquid crystal display panel comprises an upper substrate (1), a lower substrate (2), a color filter (3), an upper electrode (4), a lower electrode (5), an upper alignment film (6), a lower alignment film (7) and a liquid crystal material (8); the liquid crystal display panel is characterized in that the lower electrode (5) is positioned on the lower substrate (2), the lower orientation film (7) is positioned on the lower electrode (5), the liquid crystal material (8) is clamped between the upper orientation film (6) and the lower orientation film (7), the upper electrode (4) is positioned on the upper orientation film (6), and the color filter (3) is positioned on the upper electrode (4), the lower electrode (5) is a pixel electrode formed by a low-temperature polycrystalline silicon material, the liquid crystal molecules in the liquid crystal material (8) are oriented to be generally parallel to the upper substrate (1) and the lower substrate (2) when no voltage is applied, and the liquid crystal material (8) is a nematic phase liquid crystal composition;
the nematic liquid crystal composition comprises:
1-20% of one or more compounds of formula I based on the total weight of the liquid crystal composition
Figure FDA0003491744960000011
The compounds of the general formula I include one or more compounds of the formula I-3
Figure FDA0003491744960000012
1-40% by weight of the total liquid crystal composition of one or more compounds selected from the group consisting of compounds of formulae II-1 to II-11
Figure FDA0003491744960000013
Figure FDA0003491744960000021
Figure FDA0003491744960000022
And
Figure FDA0003491744960000023
wherein the compound of the general formula II-11 accounts for 5-25% of the total weight of the liquid crystal composition;
9.5-30% by weight, based on the total weight of the liquid crystal composition, of one or more compounds selected from the group consisting of compounds of formulae III-1 to III-8
Figure FDA0003491744960000024
Figure FDA0003491744960000031
Figure FDA0003491744960000032
And
Figure FDA0003491744960000033
one or more compounds of the general formula IV accounting for 20-80% of the total weight of the liquid crystal composition
Figure FDA0003491744960000034
Wherein,
the R is1、R5、R6And R7The same or different, each independently represents a fluorinated or non-fluorinated alkyl group having 1 to 7 carbon atoms, a fluorinated or non-fluorinated alkoxy group having 1 to 7 carbon atoms, or a fluorinated or non-fluorinated alkenyl group having 2 to 7 carbon atoms;
the R is2represents-F, a fluorinated or non-fluorinated alkoxy group having 1 to 7 carbon atoms, or a fluoroalkenyl group having 2 to 7 carbon atoms;
the R is3represents-H, a fluorinated or non-fluorinated alkyl group having 1 to 5 carbon atoms, a fluorinated or non-fluorinated alkoxy group having 1 to 7 carbon atoms, or a fluorinated or non-fluorinated alkenyl group having 2 to 5 carbon atoms;
said L1represents-H or-F;
the ring
Figure FDA0003491744960000035
To represent
Figure FDA0003491744960000036
The ring
Figure FDA0003491744960000037
Ring (C)
Figure FDA0003491744960000038
Ring (C)
Figure FDA0003491744960000039
And ring
Figure FDA00034917449600000310
Are the same or different and each independently represents
Figure FDA00034917449600000311
Z is1And Z2The same or different, each independently represents a single bond, -COO-or-CH2O-；
D and e are the same or different and each independently represents 0 or 1;
the upper substrate and the lower substrate are independently rigid transparent substrates;
the upper electrode is an indium gallium oxide electrode;
the upper alignment film and the lower alignment film are both horizontal alignment films.
2. The liquid crystal display device of claim 1, wherein the compound of formula i further comprises one or more selected from the following structures:
Figure FDA0003491744960000041
wherein,
the R is1And R2Identical or different, R1Represents a fluorinated or non-fluorinated alkyl group having 1 to 7 carbon atoms, a fluorinated or non-fluorinated alkoxy group having 1 to 7 carbon atoms, or a fluorinated or non-fluorinated alkenyl group having 2 to 7 carbon atoms;
R2represents a fluorinated or non-fluorinated alkoxy group having 1 to 7 carbon atoms or a fluorinated alkenyl group having 2 to 7 carbon atoms.
3. A liquid crystal display device as claimed in claim 1, characterized in that the compound of the general formula iv is selected from one or more compounds of the group consisting of:
Figure FDA0003491744960000042
Figure FDA0003491744960000043
and
Figure FDA0003491744960000051
wherein,
R6and R7The same or different, each independently represents an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkenyloxy group having 2 to 5 carbon atoms.
4. The liquid crystal display device of claim 1, wherein the liquid crystal composition further comprises one or more additives.
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