CN102902094B - TN-typed liquid crystal display panel and manufacturing method thereof - Google Patents
TN-typed liquid crystal display panel and manufacturing method thereof Download PDFInfo
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- CN102902094B CN102902094B CN201210371760.4A CN201210371760A CN102902094B CN 102902094 B CN102902094 B CN 102902094B CN 201210371760 A CN201210371760 A CN 201210371760A CN 102902094 B CN102902094 B CN 102902094B
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Abstract
The embodiment of the invention discloses a TN-typed liquid crystal display panel and a manufacturing method thereof, belonging to the technical field of displaying, and solving the technical problem of poor angle of view in the conventional TN-typed liquid crystal display. The TN-typed liquid crystal display panel comprises an array base plate and a color film base plate; liquid crystal mixture is arranged between the array base plate and the color film base plate; and the liquid crystal mixture contains disc-like liquid crystal with liquid crystal branched chain and nematic phase liquid crystal. The method for manufacturing the TN-shaped liquid crystal display panel comprises the following steps of: stirring uniformly the disc-like liquid crystal with liquid crystal branched chain and nematic phase liquid crystal based on a certain ratio to form the liquid crystal mixture; conducting defoaming on the liquid crystal mixture; dropwise adding the liquid crystal mixture onto an array base plate; and matching the array base plate and the color film base plate to form a liquid crystal panel. The invention is applicable to the angle of view of an enlarged TN-shaped liquid crystal display panel.
Description
Technical field
The invention belongs to display technique field, be specifically related to a kind of TN type liquid crystal panel and manufacture method thereof.
Background technology
Twisted-nematic (Twisted Nematic, TN) type liquid crystal display is a kind of common liquid crystal display.Under the condition that liquid crystal is not powered up, the longer axis parallel of the nematic liquid crystal molecule in liquid crystal panel in panel, and from array base palte to color membrane substrates distortion half-twist gradually; Under the condition powered up liquid crystal, nematic liquid crystal molecule rotates under voltage driven, and the long axis normal of nematic liquid crystal molecule arranges in plate face.Because alignment films is to the grappling effect of liquid crystal, nematic liquid crystal molecule near alignment films can not perpendicular to panel array, now from front viewing liquid crystal panel, the absorption axle of upper polarizer and lower polaroid is orthogonal, but from vergence direction viewing liquid crystal panel, the absorption axle of upper polarizer and lower polaroid is not orthogonal, causes light leakage phenomena, causes the visual angle of TN type liquid crystal display poor.
Because the nematic liquid crystal molecule near alignment films can not perpendicular to substrate arrangement, therefore there is the technical matters of subtense angle in existing TN type liquid crystal display.
Summary of the invention
Embodiments provide a kind of TN type liquid crystal panel and manufacture method thereof, solve the technical matters of existing TN type visual angle of liquid crystal display difference.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of TN type liquid crystal panel, comprises array base palte and color membrane substrates, is provided with liquid crystal compound between described array base palte and described color membrane substrates, and described liquid crystal compound comprises discotic mesogenic with liquid crystal liquid crystal property side chain and nematic liquid crystal.
Embodiments of the invention additionally provide the manufacture method of above-mentioned TN type liquid crystal panel, comprising:
Stir with the discotic mesogenic (Discotic Liquid Crystals, DLC) of liquid crystal liquid crystal property side chain and nematic liquid crystal by a certain percentage, form liquid crystal compound;
Deaeration process is carried out to described liquid crystal compound;
Described liquid crystal compound is added drop-wise on array base palte;
Described array base palte and color membrane substrates are carried out box, forms liquid crystal panel.
Compared with prior art, technique scheme tool provided by the present invention has the following advantages: in technical scheme provided by the invention, in nematic liquid crystal, with the addition of discotic mesogenic, and add discotic mesogenic side chain there is liquid crystal liquid crystal property.Because nematic liquid crystal has optics positivity, this kind of discotic mesogenic has optics negativity, and the side chain of this discotic mesogenic has liquid crystal liquid crystal property, so refractive index Nx, the Ny of selected discotic mesogenic plane can be made close with the refractive index Nz of nematic liquid crystal major axis or equal after mixing.The longer axis parallel of such nematic liquid crystal is when the axial direction of discotic mesogenic, refractive index Nx=Ny=Nz after the two combination, achieve the optical compensation of discotic mesogenic to the nematic liquid crystal near alignment films, thus increase the visual angle of TN type liquid crystal display, solve the technical matters of existing TN type visual angle of liquid crystal display difference.
In addition, the discotic mesogenic with liquid crystal liquid crystal property side chain has better dissolubility in nematic liquid crystal, and therefore discotic mesogenic and nematic liquid crystal can realize Homogeneous phase mixing, makes dish fill liquid crystal in nematic liquid crystal, has good optical compensation effect.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The manufacture method process flow diagram of the TN type liquid crystal panel that Fig. 1 provides for embodiments of the invention;
Fig. 2 is the shape appearance figure of discotic mesogenic in embodiments of the invention;
Structural representation when the TN type liquid crystal panel that Fig. 3 a and Fig. 3 b is respectively embodiments of the invention to be provided powers up and do not power up;
Fig. 4 is the schematic diagram of optical compensation in embodiments of the invention;
The visual angle test pattern of the TN type liquid crystal panel that Fig. 5 provides for embodiments of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not paying creative work, all belongs to the scope of protection of the invention.
As shown in Figure 1, the manufacture method of twisted-nematic (Twisted Nematic, TN) the type liquid crystal panel that the embodiment of the present invention provides, comprises the following steps:
S1: stir with the discotic mesogenic of liquid crystal liquid crystal property side chain and nematic phase phase liquid crystal by a certain percentage, forms liquid crystal compound.
Concrete, in this liquid crystal compound, the massfraction of nematic liquid crystal can be chosen between 40-90%, and the massfraction of discotic mesogenic can be chosen between 10-60%.In the present embodiment, the massfraction of nematic liquid crystal is 90%, and the massfraction of discotic mesogenic is 10%.
S2: deaeration process is carried out to liquid crystal compound.
Concrete, liquid crystal compound is put into defoamer, carries out lucifuge deaeration process to it, inclined heated plate is 1-4 hour.
S3: liquid crystal compound is added drop-wise on array base palte.
On the other hand, also need to apply sealed plastic box on color membrane substrates so that afterwards to box technique in use.
S4: by array base palte with coat sealed plastic box color membrane substrates and carry out box, through ultraviolet light irradiation and heating, form liquid crystal panel.
Concrete, utilize vacuum array base palte and color membrane substrates to be carried out becoming liquid crystal cell to box-like to box technique.Then, carry out ultraviolet light irradiation to liquid crystal cell, the time of ultraviolet light irradiation is within 180 minutes, and ultraviolet light irradiation intensity is 0.1-100mW/cm
2, the ultraviolet polymerisable monomer in sealed plastic box is polymerized.Heat again afterwards, the thermal polymerization monomer in sealed plastic box is polymerized, liquid crystal cell is sealed, makes liquid crystal panel.
Preferably, after formation liquid crystal panel, also following steps are carried out:
S5: detect liquid crystal panel, detects liquid crystal panel and whether there is the bad phenomenon such as out-of-flatness, crack, and the index such as the leakproofness of liquid crystal panel.
S6: liquid crystal panel is cut into required size.
The discotic liquid-crystalline molecules that the embodiment of the present invention uses is made up of core and some side chain R.The core of discotic liquid-crystalline molecules can be a phenyl ring, also can for the condensed ring be made up of multiple phenyl ring.Below list the structural formula of the core of four kinds of discotic liquid-crystalline molecules:
The side chain R of discotic liquid-crystalline molecules is by phenyl ring and/or cyclohexyl, and carbochain is formed, and below lists the structural formula of seven kinds of side chain R:
Wherein, n is the integer between 1 to 7; Preferably, n=4.
The side chain R of discotic liquid-crystalline molecules increases an ester group on the basis of said structure, and concrete structural formula is as follows:
Wherein, n is the integer between 1 to 7; Preferably, n=4.
Fig. 2 is the polarizing microscope photo of discotic mesogenic in the embodiment of the present invention, obviously can find out the plate institutional framework of discotic mesogenic from Fig. 2.
As shown in Figure 3 a and Figure 3 b shows, the embodiment of the present invention additionally provides a kind of TN type liquid crystal panel utilizing above-mentioned manufacture method to make, comprise array base palte and color membrane substrates, illustrate only in Fig. 3 a and Fig. 3 b and be arranged at lower polaroid 11 on array base palte and lower alignment films 12, and the upper polarizer 21 be arranged on color membrane substrates and upper alignment films 22.
Be liquid crystal compound between array base palte and color membrane substrates, liquid crystal compound comprises discotic mesogenic 3 with liquid crystal liquid crystal property side chain and nematic liquid crystal 4.Wherein, the massfraction of nematic liquid crystal 4 is 40-90%, and the massfraction of discotic mesogenic 3 is 10-60%.In the present embodiment, the massfraction of nematic liquid crystal 4 is 80%, and the massfraction of discotic mesogenic 3 is 20%.
In other embodiments, the ratio of discotic mesogenic 3 and nematic liquid crystal 4 can need to carry out proportioning according to both specifications, kind and use, and refractive index Nx, the Ny of selected discotic mesogenic 3 plane are preferably equal with the refractive index Nz of nematic liquid crystal 4 major axis.
As shown in Figure 3 a, when not powering up liquid crystal, the longer axis parallel of the nematic liquid crystal molecule 4 in liquid crystal panel in plate face, and from array base palte to color membrane substrates distortion half-twist gradually.
As shown in Figure 3 b, when powering up liquid crystal, nematic liquid crystal molecule 4 rotates under voltage driven, and the long axis normal of nematic liquid crystal molecule 4 in the arrangement of plate face, but can not arrange perpendicular to plate face near the nematic liquid crystal molecule 4 of alignment films.Discotic liquid-crystalline molecules 3 now in liquid crystal panel just can carry out optical compensation to this part nematic liquid crystal molecule 4, as shown in Figure 4, the longer axis parallel of nematic liquid crystal is when the axial direction of discotic mesogenic, refractive index Nx=Ny=Nz after the two combination, through the optical compensation of discotic mesogenic, during from vergence direction viewing liquid crystal panel, the absorption axle of upper polarizer and lower polaroid is also orthogonal, can not light leak be produced, thus increase the visual angle of TN type liquid crystal display.
Liquid crystal panel visual angle test pattern as shown in Figure 5, can find out that at visual angle when being 45 °, the contrast of liquid crystal panel has all exceeded 50, reaches good viewing angle compensation effect.
In the embodiment of the present invention, in nematic liquid crystal, with the addition of discotic mesogenic, and add discotic mesogenic side chain there is liquid crystal liquid crystal property.Because nematic liquid crystal has optics positivity, this kind of discotic mesogenic has optics negativity, and the side chain of this discotic mesogenic has liquid crystal liquid crystal property, so the refractive index Nx=Ny=Nz after the two combination can be made after mixing, achieve the optical compensation of discotic mesogenic to the nematic liquid crystal near alignment films, thus increase the visual angle of TN type liquid crystal display, solve the technical matters of existing TN type visual angle of liquid crystal display difference.
In addition, during the embodiment of the present invention provides, discotic mesogenic with liquid crystal liquid crystal property side chain has better dissolubility in nematic liquid crystal, and therefore discotic mesogenic and nematic liquid crystal can realize Homogeneous phase mixing, makes dish fill liquid crystal in nematic liquid crystal, has good optical compensation effect.And in the manufacture process of TN type liquid crystal panel, by discotic mesogenic and nematic liquid crystal by a certain percentage mixing and stirring just can form liquid crystal compound, just can drip on array base palte through deaeration process again, so the manufacture method of TN type liquid crystal panel that the embodiment of the present invention provides implement simply, convenient, and cost is very low.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (11)
1. a TN type liquid crystal panel, comprise array base palte and color membrane substrates, it is characterized in that: between described array base palte and described color membrane substrates, be provided with liquid crystal compound, described liquid crystal compound comprises discotic mesogenic with liquid crystal liquid crystal property side chain and nematic liquid crystal, and described discotic mesogenic is used for carrying out optical compensation to described nematic liquid crystal.
2. liquid crystal panel according to claim 1, is characterized in that: in described liquid crystal compound, and the massfraction of nematic liquid crystal is 40-90%, and the massfraction of discotic mesogenic is 10-60%.
3. liquid crystal panel according to claim 2, is characterized in that: the massfraction of described nematic liquid crystal is 80%, and the massfraction of described discotic mesogenic is 20%.
4. liquid crystal panel according to claim 1, is characterized in that: comprise phenyl ring and/or cyclohexyl in the side chain of described discotic liquid-crystalline molecules, and carbochain.
5. liquid crystal panel according to claim 4, is characterized in that: also comprise ester group in the side chain of described discotic liquid-crystalline molecules.
6. a manufacture method for TN type liquid crystal panel, is characterized in that, comprising:
Stir with the discotic mesogenic of liquid crystal liquid crystal property side chain and nematic liquid crystal by a certain percentage, form liquid crystal compound;
Deaeration process is carried out to described liquid crystal compound;
Described liquid crystal compound is added drop-wise on array base palte;
Described array base palte and color membrane substrates are carried out box, forms liquid crystal panel.
7. manufacture method according to claim 6, is characterized in that: after described formation liquid crystal panel, also comprise:
Described liquid crystal panel is detected;
Described liquid crystal panel is cut.
8. manufacture method according to claim 6, is characterized in that: in described liquid crystal compound, and the massfraction of nematic liquid crystal is 40-90%, and the massfraction of discotic mesogenic is 10-60%.
9. manufacture method according to claim 8, is characterized in that: the massfraction of described nematic liquid crystal is 80%, and the massfraction of described discotic mesogenic is 20%.
10. manufacture method according to claim 6, is characterized in that: comprise phenyl ring and/or cyclohexyl in the side chain of described discotic liquid-crystalline molecules, and carbochain.
11. manufacture methods according to claim 10, is characterized in that: also comprise ester group in the side chain of described discotic liquid-crystalline molecules.
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| CN201210371760.4A CN102902094B (en) | 2012-09-28 | 2012-09-28 | TN-typed liquid crystal display panel and manufacturing method thereof |
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Citations (4)
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| JP2007264065A (en) * | 2006-03-27 | 2007-10-11 | Fujifilm Corp | Phase difference compensating element |
| CN101589049A (en) * | 2007-01-22 | 2009-11-25 | Lg化学株式会社 | Disc liquid-crystal compounds, the blooming that comprises the liquid-crystal composition of this compound and use this liquid-crystal composition |
| CN102211973A (en) * | 2011-04-11 | 2011-10-12 | 北京科技大学 | Orientation-controllable benzophenanthrene disc-shaped liquid crystal molecule and preparation method thereof |
| CN102645778A (en) * | 2012-03-08 | 2012-08-22 | 北京京东方光电科技有限公司 | Liquid crystal display panel and manufacturing method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007264065A (en) * | 2006-03-27 | 2007-10-11 | Fujifilm Corp | Phase difference compensating element |
| CN101589049A (en) * | 2007-01-22 | 2009-11-25 | Lg化学株式会社 | Disc liquid-crystal compounds, the blooming that comprises the liquid-crystal composition of this compound and use this liquid-crystal composition |
| CN102211973A (en) * | 2011-04-11 | 2011-10-12 | 北京科技大学 | Orientation-controllable benzophenanthrene disc-shaped liquid crystal molecule and preparation method thereof |
| CN102645778A (en) * | 2012-03-08 | 2012-08-22 | 北京京东方光电科技有限公司 | Liquid crystal display panel and manufacturing method thereof |
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