CN101503626B - Liquid crystal material and optical compensation flexure type mode liquid crystal display - Google Patents
Liquid crystal material and optical compensation flexure type mode liquid crystal display Download PDFInfo
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- CN101503626B CN101503626B CN200910111111A CN200910111111A CN101503626B CN 101503626 B CN101503626 B CN 101503626B CN 200910111111 A CN200910111111 A CN 200910111111A CN 200910111111 A CN200910111111 A CN 200910111111A CN 101503626 B CN101503626 B CN 101503626B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 159
- 230000003287 optical effect Effects 0.000 title claims abstract description 76
- 239000000463 material Substances 0.000 title claims abstract description 73
- 239000000758 substrate Substances 0.000 claims abstract description 24
- 239000010409 thin film Substances 0.000 claims description 11
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 10
- 125000003545 alkoxy group Chemical group 0.000 claims description 10
- 125000004448 alkyl carbonyl group Chemical group 0.000 claims description 10
- 125000000217 alkyl group Chemical group 0.000 claims description 10
- 229910052731 fluorine Inorganic materials 0.000 claims description 10
- 239000011737 fluorine Substances 0.000 claims description 10
- 229910052739 hydrogen Inorganic materials 0.000 claims description 10
- 239000001257 hydrogen Substances 0.000 claims description 10
- 125000004453 alkoxycarbonyl group Chemical group 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 125000004432 carbon atom Chemical group C* 0.000 claims description 5
- 150000007942 carboxylates Chemical class 0.000 claims description 5
- 125000004185 ester group Chemical group 0.000 claims description 5
- 210000002858 crystal cell Anatomy 0.000 description 9
- 238000005452 bending Methods 0.000 description 6
- 230000035515 penetration Effects 0.000 description 5
- 230000005684 electric field Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000003292 diminished effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The invention relates to a liquid crystal material and an optical compensated bend mode liquid crystal display applying the liquid crystal material, in particular to a liquid crystal material with lower brightness driving voltage and quicker response speed and an optical compensated bend mode liquid crystal display applying the liquid crystal material. The liquid crystal material comprises an optical compensated bend mode liquid crystal molecule and a bend molecule with a novel structure. The optical compensated bend mode liquid crystal display comprises an active component array substrate, a counter substrate and the liquid crystal material, wherein the liquid crystal material comprises the optical compensated bend mode liquid crystal molecule and the bend molecule, the counter substrate is provided with a counter electrode; and the liquid crystal material is configured between the active component array substrate and the counter substrate.
Description
Technical field
The present invention relates to a kind of liquid crystal material and the optical compensation flexure type mode liquid crystal display of using said liquid crystal material, particularly a kind of have lower bright attitude driving voltage and a liquid crystal material and the optical compensation flexure type mode liquid crystal display of using said liquid crystal material of answer speed faster.
Background technology
Because LCD has space availability ratio, the low voltage operating of high image quality, height, the characteristic of radiationless line scattering, so LCD becomes the main flow on the market in recent years gradually.And for according with the demands of the market, LCD develops towards the direction of large scale and wide viewing angle gradually.
In the prior art; In order to meet the demand of wide viewing angle; Usually adopt twisted nematic (Twisted Nematic; TN) (in-plane switching, IPS) type display panels, limit switching (fringe field switching) type display panels and multiple regions perpendicular are arranged (Multi-domain Vertical Alignment, MVA) type display panels for type display panels collocation view film, the switching of horizontal copline.Therefore, display panels is on display panels, to do special design in order to meet the demand of wide viewing angle mostly.But, on display panels, do difficulty and cost of manufacture that special design can increase making.
In order to overcome the problems referred to above, develop a kind of optical compensation flexure type mode liquid crystal display (Optical Compensated Bend Mode Liquid Crystal Display, OCB Mode LCD) in recent years.Optical compensation flexure type mode liquid crystal display is when showing; The optical compensation flexure type mode liquid crystal molecule that it had is arranged in parallel at the upper and lower surfaces of glass substrate, and the optical compensation flexure type mode liquid crystal molecule between glass substrate then is to present case of bending (bend) in same plane inner bending arrangement.This kind pattern of rows and columns can overcome in the prior art larger part at the visual angle of LCD, because of the changes in optical properties that caused by liquid crystal molecules tilt.Therefore, optical compensation flexure type mode liquid crystal display has the advantage of wide viewing angle, and does not need on display panels, to do special design, so the processing procedure of applicable general LCD and can not cause burden to cost of manufacture.
Yet; When optical compensation flexure type mode liquid crystal display is closed condition (the optical compensation flexure type mode liquid crystal molecule is when the state of no electric field); The optical compensation flexure type mode liquid crystal molecule is extended configuration (splay), and just the optical compensation flexure type mode liquid crystal molecule all is parallel to panel.Therefore, when driving optical compensation flexure type mode liquid crystal display, needs are than long preset time or higher bright attitude driving voltage is so that the optical compensation flexure type mode liquid crystal molecule converts case of bending to by extended configuration at every turn.Also therefore, reduce the optical compensation flexure type mode liquid crystal molecule and convert needed preset time of case of bending or bright attitude driving voltage to, become the primary at present problem that solves by extended configuration.
Summary of the invention
The object of the present invention is to provide a kind of liquid crystal material, needed bright attitude driving voltage was lower when this liquid crystal material converted case of bending to by extended configuration, and had answer speed faster.
Another object of the present invention is to provide a kind of optical compensation flexure type mode liquid crystal display, this LCD has lower bright attitude driving voltage and answer speed faster.
For realizing goal of the invention, the present invention proposes a kind of liquid crystal material, comprising: an optical compensation flexure type mode liquid crystal molecule and a flexure type molecule.Wherein, the flexure type molecule has the represented structure of formula (1):
Formula (1)
And in formula (1), A represents following wherein a part formula:
Wherein, L represents hydrogen or fluorine, and the r value is 1,2,3, and 4,5,6,7 or 8.In addition, X represents ester group (COO), and B then represents following wherein a part formula:
Wherein, L represents hydrogen or fluorine, and the r value is 1,2,3, and 4,5,6,7 or 8.In addition, C represents alkyl (alkyl), alkoxy (alkoxyl), alkyl carbonyl (alkylcarbonyl) or has the carboxylate crowd (alkoxycarbonyl group) of 1～12 carbon atom.
For realizing another goal of the invention, the present invention has also disclosed a kind of optical compensation flexure type mode liquid crystal display, comprising: an active assembly array base plate, a subtend substrate and a liquid crystal material.Wherein, the subtend substrate has a subtend electrode, and liquid crystal material configurations is between active assembly array base plate and subtend substrate.Liquid crystal material comprises an optical compensation flexure type mode liquid crystal molecule and a flexure type molecule.Wherein, the flexure type molecule has the represented structure of formula (1):
Formula (1)
Wherein, the following wherein a part formula of A representative:
Wherein, L represents hydrogen or fluorine, and the r value is 1,2,3, and 4,5,6,7 or 8.In addition, X represents ester group (COO), and B then represents following wherein a part formula:
Wherein, L represents hydrogen or fluorine, and the r value is 1,2,3, and 4,5,6,7 or 8.In addition, C represents alkyl (alkyl), alkoxy (alkoxyl), alkyl carbonyl (alkylcarbonyl) or has the carboxylate crowd (alkoxycarbonyl group) of 1～12 carbon atom.
Said subtend substrate more comprises a chromatic filter layer, and chromatic filter layer is disposed at the below of counter electrode.
Said active assembly array base plate comprises multi-strip scanning line, many data lines, a plurality of thin film transistor (TFT) and a plurality of pixel electrodes.Wherein, an one scan line and a data line electrically connect each thin film transistor (TFT) respectively with wherein.Each pixel electrode then electrically connects with a thin film transistor (TFT) wherein respectively.
The flexure type molecular structure that is applicable to above-mentioned liquid crystal material and optical compensation flexure type mode liquid crystal display simultaneously have the represented structure of following formula (2)～formula (6) at least one of them:
The part by weight of flexure type molecule and optical compensation flexure type mode liquid crystal molecule is between 0.01%～5%.
The part by weight of flexure type molecule and optical compensation flexure type mode liquid crystal molecule is 0.5%.
In sum, the flexure type molecule of liquid crystal material of the present invention can effectively reduce the bright attitude driving voltage of liquid crystal material, and can improve the answer speed of liquid crystal material.
Below in conjunction with accompanying drawing and specific embodiment the present invention is done further detailed description.
Description of drawings
Fig. 1 is the sectional view of the optical compensation flexure type mode liquid crystal display of one embodiment of the invention.
Fig. 2 is the top view of active assembly array base plate among Fig. 1.
Embodiment
The present invention proposes the optical compensation flexure type mode liquid crystal display of a kind of liquid crystal material and a kind of application of aforementioned liquid crystal material, and wherein liquid crystal material comprises optical compensation flexure type mode liquid crystal molecule and flexure type molecule.When this kind liquid crystal material was applied in optical compensation flexure type mode liquid crystal display, the flexure type molecule can help this kind liquid crystal material to have lower bright attitude driving voltage and answer speed faster.
The liquid crystal material of one embodiment of the invention comprises an optical compensation flexure type mode liquid crystal molecule and a flexure type molecule.Wherein, the flexure type molecule has the represented structure of formula (1):
Formula (1)
And in formula (1), A represents following wherein a part formula:
Wherein, L represents hydrogen or fluorine, and the r value is 1,2,3, and 4,5,6,7 or 8.X represents ester group (COO), and X can be connected on 1,3 position of A, so that the flexure type molecule has crooked molecular structure.B represents following wherein a part formula:
Wherein, L represents hydrogen or fluorine, and the r value is 1,2,3, and 4,5,6,7 or 8.C then represents alkyl (alkyl), alkoxy (alkoxyl), alkyl carbonyl (alkylcarbonyl) or has the carboxylate crowd (alkoxycarbonyl group) of 1～12 carbon atom.
Particularly, the flexure type molecular structure for example be the represented structure of following formula (2)～formula (6) at least one of them:
So the invention is not restricted to this, that is flexure type molecule of the present invention can also be other flexure type molecule with the represented structure of formula (1).
The part by weight of flexure type molecule and optical compensation flexure type mode liquid crystal molecule can be between 0.01%～5%, so the invention is not restricted to this.In a preferred embodiment, the part by weight of flexure type molecule and optical compensation flexure type mode liquid crystal molecule is 0.5%.
When below introduction becomes of the present invention liquid crystal material with the optical compensation flexure type mode liquid crystal molecule with the Different Weight percentage mix with flexure type molecule of the present invention, bright attitude driving voltage and answer speed that liquid crystal material had.
In present embodiment; Be that the flexure type molecule of formula (2), formula (3), formula (4), formula (5) or formula (6) is mixed to form liquid crystal material with 0wt%, 0.1wt%, 0.5wt%, 1wt% or five kinds of different ratios of 5wt% and optical compensation flexure type mode liquid crystal molecule (for example adopt the ZCE-5096 liquid crystal molecule, Merck & Co., Inc. produces).Then, liquid crystal material is injected in the liquid crystal cell with both alignment layers (U.S. phase company, the liquid crystal cell spacing is 4.25 μ m).Then, liquid crystal cell is alternately applied positive and negative 10 volts voltage, make the liquid crystal material in the liquid crystal cell remain on case of bending about 3 minutes.Afterwards; Reduce the voltage that puts on liquid crystal cell gradually, and write down the light penetration of the voltage and the corresponding liquid crystal cell that put on liquid crystal cell, when the light penetration of liquid crystal cell reaches maximum; The voltage that put on liquid crystal cell this moment is bright attitude driving voltage, and experimental result is as shown in table 1.The flexure type molecule that table 1 is listed out formula (2), formula (3), formula (4), formula (5) and formula (6) mixes with the optical compensation flexure type mode liquid crystal molecule with 0wt%, 0.1wt%, 0.5wt%, 1wt% or five kinds of different ratios of 5wt% and the bright attitude driving voltage of the liquid crystal material that forms.
Table 1
At this, the bright attitude driving voltage that more records simple optical compensation flexure type mode liquid crystal molecule with identical condition is 1.9 volts.Can know by table 1; The flexure type molecule of hybrid (2), formula (3), formula (4), formula (5) or formula (6) and the bright attitude driving voltage of the formed liquid crystal material of optical compensation flexure type mode liquid crystal molecule are all less than 1.9 volts; Thereby the optical compensation flexure type mode liquid crystal molecule sneaked into after the flexure type molecule, its bright attitude driving voltage has diminished really.So, the flexure type molecule of provable liquid crystal material of the present invention can effectively reduce the bright attitude driving voltage of liquid crystal material.
In addition, in present embodiment, also measure the response time of liquid crystal material.Just liquid crystal material is continuously applied one first generating positive and negative voltage, the penetration that makes liquid crystal material is a minimum value.Then, liquid crystal material is applied one second generating positive and negative voltage, and make the penetration of liquid crystal material be transformed into maximal value by minimum value.Then, once more liquid crystal material is applied first generating positive and negative voltage, make the penetrance of liquid crystal material change minimum value into by maximal value.Foregoing liquid crystal material penetration is transformed into maximal value by minimum value, and required T.T. of process is response time by what maximal value changed minimum value into.The flexure type molecule that table 2 is listed out formula (2), formula (3), formula (4), formula (5) or formula (6) mixes with the optical compensation flexure type mode liquid crystal molecule with 0.1wt%, 0.5wt%, 1wt% or four kinds of different ratios of 5wt% and the response time of the liquid crystal material that forms.
Table 2
At this, the response time that also records simple optical compensation flexure type mode liquid crystal molecule with identical condition is 4.57 milliseconds.Can know by table 2; The flexure type molecule of hybrid (2), formula (3), formula (4), formula (5) or formula (6) and the response time of the formed liquid crystal material of optical compensation flexure type mode liquid crystal molecule all are lower than 4.57 seconds, thereby the response time that has added the optical compensation flexure type mode liquid crystal molecule of flexure type molecule has shortened really.Just, the answer speed of liquid crystal material of the present invention is fast than the answer speed of optical compensation flexure type mode liquid crystal molecule.So, the flexure type molecule of provable liquid crystal material of the present invention can effectively promote the answer speed of liquid crystal material.
Hold the above, the flexure type molecule of liquid crystal material of the present invention can effectively reduce the bright attitude driving voltage of liquid crystal material and promote the answer speed of liquid crystal material.
Fig. 1 is the sectional view of the optical compensation flexure type mode liquid crystal display of one embodiment of the invention, and Fig. 2 is the top view of active assembly array base plate among Fig. 1.Please with reference to Fig. 1, optical compensation flexure type mode liquid crystal display 100 comprises an active assembly array base plate 110, a subtend substrate 120 and a liquid crystal material 130.Wherein, subtend substrate 120 has a subtend electrode 122.Liquid crystal material 130 is disposed between active assembly array base plate 110 and the subtend substrate 120.It should be noted that liquid crystal material 130 is identical with the foregoing liquid crystal material.
In addition, please be simultaneously with reference to Fig. 1 and Fig. 2, active assembly array base plate 110 comprises multi-strip scanning line 112 and many data lines 114, a plurality of thin film transistor (TFT) 116 and a plurality of pixel electrodes 118.Thin film transistor (TFT) 116 and wherein one scan line 112 and a wherein data line 114 electric connections.Pixel electrode 118 electrically connects with a thin film transistor (TFT) 116 wherein, and pixel electrode 118 therewith a thin film transistor (TFT) 116 can constitute a picture element unit P.In addition, a configurable chip 210 is on active assembly array base plate 110, and chip 210 can electrically connect with sweep trace 112 and data line 114.So, can make pixel electrode 118 have a voltage by the pixel electrode 118 of chip 210 control active assembly array base plates 110.Simultaneously; Also the counter electrode 122 of subtend substrate 120 is switched on; Make counter electrode 122 have another voltage, and then can between active assembly array base plate 110 and subtend substrate 120, form an electric field (just liquid crystal material 130 being applied a voltage), with control liquid crystal material 130.
In addition, subtend substrate 120 also can comprise a chromatic filter layer 124.Wherein, chromatic filter layer 124 is disposed at counter electrode 122 belows.In addition, subtend substrate 120 more can comprise a protective seam 126, and protective seam 126 is between chromatic filter layer 124 and counter electrode 122.
In other embodiment, above-mentioned chromatic filter layer 124 is not one to fix on and be arranged on the subtend substrate 120, and it can also be arranged on the active assembly array base plate 110, and chromatic filter layer 124 can be positioned at picture element unit P above or below.
In other embodiment, optical compensation flexure type mode liquid crystal display also can comprise a backlight module (not illustrating), and is disposed at an active assembly array base plate 110 or a side of subtend substrate 120.
Hold the above, because the liquid crystal material 130 of optical compensation flexure type mode liquid crystal display 100 of the present invention is identical with aforesaid liquid crystal material, therefore, the bright attitude driving voltage of optical compensation flexure type mode liquid crystal display 100 is lower and answer speed is very fast.Thus; Optical compensation flexure type mode liquid crystal display 100 is because required bright attitude driving voltage is lower; Therefore the electronic package (as: thin film transistor (TFT) 116, chip 210 etc.) of optical compensation flexure type mode liquid crystal display 100 will be difficult for when driving, damaging because of bearing high voltage, so can prolong the serviceable life of the electronic package of optical compensation flexure type mode liquid crystal display 100.In addition, because the answer speed of optical compensation flexure type mode liquid crystal display 100 is very fast, therefore when optical compensation flexure type mode liquid crystal display 100 shows dynamic menus, be difficult for having ghost etc. in response to answering speed partially slowly and the problem of generation.
In sum, the flexure type molecule of liquid crystal material of the present invention can effectively reduce the bright attitude driving voltage of liquid crystal material, and can improve the answer speed of liquid crystal material.And when liquid crystal material of the present invention is applied in the optical compensation flexure type mode liquid crystal display, also have identical advantage.Thus; Optical compensation flexure type mode liquid crystal display is because required bright attitude driving voltage is lower; Therefore the electronic package of optical compensation flexure type mode liquid crystal display will be difficult for when driving, damaging because of bearing high voltage, so can prolong the serviceable life of the electronic package of optical compensation flexure type mode liquid crystal display.In addition, because the answer speed of optical compensation flexure type mode liquid crystal display is very fast, therefore when optical compensation flexure type mode liquid crystal display shows dynamic menu, be difficult for having ghost etc. in response to answering speed partially slowly and the problem of generation.
More than be preferred embodiment of the present invention, all changes of doing according to technical scheme of the present invention when the function that is produced does not exceed the scope of technical scheme of the present invention, all belong to protection scope of the present invention.
Claims (10)
1. liquid crystal material comprises:
One optical compensation flexure type mode liquid crystal molecule; And
One flexure type molecule has the represented structure of formula (1):
Formula (1)
Wherein, the following wherein a part formula of A representative:
Wherein, L represents hydrogen or fluorine, and the r value is 1,2,3, and 4,5,6,7 or 8; X represents ester group (COO);
B represents following wherein a part formula:
Wherein, L represents hydrogen or fluorine, and the r value is 1,2,3, and 4,5,6,7 or 8;
C represents alkyl (alkyl), alkoxy (alkoxyl), alkyl carbonyl (alkylcarbonyl) or has the carboxylate crowd (alkoxycarbonyl group) of 1～12 carbon atom.
2. liquid crystal material according to claim 1 is characterized in that: said flexure type molecular structure have the represented structure of following formula (2)～formula (6) at least one of them:
.
3. liquid crystal material according to claim 1 is characterized in that: the part by weight of said flexure type molecule and said optical compensation flexure type mode liquid crystal molecule is between 0.01%～5%.
4. liquid crystal material according to claim 1 is characterized in that: the part by weight of said flexure type molecule and said optical compensation flexure type mode liquid crystal molecule is 0.5%.
5. optical compensation flexure type mode liquid crystal display is characterized in that: comprising:
One active assembly array base plate;
One subtend substrate, said subtend substrate has a subtend electrode; And
One liquid crystal material is disposed between said active assembly array base plate and the said subtend substrate, and said liquid crystal material comprises:
One optical compensation flexure type mode liquid crystal molecule; And
One flexure type molecule has the represented structure of formula (1):
Formula (1)
Wherein, the following wherein a part formula of A representative:
Wherein, L represents hydrogen or fluorine, and the r value is 1,2,3, and 4,5,6,7 or 8; X represents ester group (COO);
B represents following wherein a part formula:
Wherein, L represents hydrogen or fluorine, and the r value is 1,2,3, and 4,5,6,7 or 8;
C represents alkyl (alkyl), alkoxy (alkoxyl), alkyl carbonyl (alkylcarbonyl) or has the carboxylate crowd (alkoxycarbonyl group) of 1～12 carbon atom.
6. optical compensation flexure type mode liquid crystal display according to claim 5 is characterized in that: said flexure type molecular structure have the represented structure of following formula (2)～formula (6) at least one of them:
7. optical compensation flexure type mode liquid crystal display according to claim 5 is characterized in that: the part by weight of said flexure type molecule and said optical compensation flexure type mode liquid crystal molecule is between 0.01%～5%.
8. optical compensation flexure type mode liquid crystal display according to claim 5 is characterized in that: the part by weight of said flexure type molecule and said optical compensation flexure type mode liquid crystal molecule is 0.5%.
9. optical compensation flexure type mode liquid crystal display according to claim 5 is characterized in that: said subtend substrate more comprises a chromatic filter layer, and said chromatic filter layer is disposed at the below of said counter electrode.
10. optical compensation flexure type mode liquid crystal display according to claim 5 is characterized in that: said active assembly array base plate comprises:
Multi-strip scanning line and many data lines;
An one scan line and a data line electrically connect respectively with wherein for a plurality of thin film transistor (TFT)s, said each thin film transistor (TFT); And a plurality of pixel electrodes, said each pixel electrode electrically connects with a thin film transistor (TFT) wherein respectively.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004058002A1 (en) * | 2003-12-17 | 2005-07-21 | Merck Patent Gmbh | Liquid crystal medium with positive dielectric anisotropy, used in electrooptical e.g. twisted nematic, thin film transistor or optically compensated bent display, contains pyranyl-benzene and fluoro-phenyl or -terphenyl or ester compounds |
| CN101133009A (en) * | 2005-03-03 | 2008-02-27 | 智索株式会社 | Chlorofluorobenzene liquid crystal compound, liquid crystal composition, and liquid crystal display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004058002A1 (en) * | 2003-12-17 | 2005-07-21 | Merck Patent Gmbh | Liquid crystal medium with positive dielectric anisotropy, used in electrooptical e.g. twisted nematic, thin film transistor or optically compensated bent display, contains pyranyl-benzene and fluoro-phenyl or -terphenyl or ester compounds |
| CN101133009A (en) * | 2005-03-03 | 2008-02-27 | 智索株式会社 | Chlorofluorobenzene liquid crystal compound, liquid crystal composition, and liquid crystal display device |
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| Title |
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| JP特开2006-160727A 2006.06.22 |
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