CN101718927B - Liquid crystal alignment layer and manufacturing method thereof - Google Patents
Liquid crystal alignment layer and manufacturing method thereof Download PDFInfo
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- CN101718927B CN101718927B CN2009103103899A CN200910310389A CN101718927B CN 101718927 B CN101718927 B CN 101718927B CN 2009103103899 A CN2009103103899 A CN 2009103103899A CN 200910310389 A CN200910310389 A CN 200910310389A CN 101718927 B CN101718927 B CN 101718927B
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- liquid crystal
- silicon dioxide
- organic material
- crystal alignment
- material layer
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Abstract
The invention relates to a liquid crystal alignment layer and a manufacturing method thereof. The liquid crystal alignment layer comprises an organic material layer and a plurality of silicon dioxide particles, wherein the plurality of silicon dioxide particles are formed on the organic material layer, and each silicon oxide particle contains at least one amino group (-NH2). The liquid crystal alignment layer can effectively improve the response time of the liquid crystal display.
Description
Technical field
The invention relates to a kind of liquid crystal alignment layer, particularly relevant for a kind of liquid crystal alignment layer of optical-compensation bent.
Background technology
In recent years, the correlation technique of flat-panel screens industry, (Liquid Crystal Display, maturation has been driven in development LCD) like LCD.Only manage LCD because of having advantages such as low radiation property and volume be compact, but when the user watched LCD from different perspectives, along with the increase at visual angle, its contrast (contrast ratio) can be successively decreased but, and produce the restriction at visual angle.In addition, the speed of answering of present liquid crystal indicator on the market still dislikes not enough slightly, makes and in the demonstration of dynamic image, often is detained obfuscation because of image.
Therefore; A kind of use optical compensation pattern (optically compensated birefringence; OCB) liquid crystal indicator is developed out, and it can increase the visual angle of LCD and speed its reaction velocity, to promote the quality of image of LCD.Therefore generally speaking, under the operator scheme of OCB, the optical compensation mode display device has advantages such as high reaction rate and wide visual angle, has high expansionary.
Yet in the following time of operator scheme of OCB, the each driving all must prepared one section Preset Time and let liquid crystal molecule be torqued into the bending status (bend mode) of correct position, ability operate as normal from divergence attitude (splay mode).Therefore, in order to let liquid crystal molecule be torqued into the bending status of correct position from the transition of divergence attitude, it must expend certain driving voltage, and its answer speed that therefore can slow down a little makes the liquid crystal indicator of optical compensation pattern have the effect of retardation reaction to produce.
Summary of the invention
In view of this, in order to address the above problem, the present invention provides a kind of liquid crystal alignment layer, and it can improve the answer speed of LCD.
In addition, the present invention provides a kind of manufacturing approach of liquid crystal alignment layer of the answer speed that improves LCD in addition.
For reaching above-mentioned purpose of the present invention; The present invention provides a kind of liquid crystal alignment layer; Comprise an organic material layer and a plurality of silicon dioxide granule, wherein a plurality of silicon dioxide granules are formed on this organic material layer, and each silicon dioxide granule contains at least one amino (NH2) group.
Among the foregoing invention embodiment, described organic material layer is to be a polyimide (Polyimide) layer.
Among the foregoing invention embodiment, described organic material layer is the functional group who comprises a polyamic acid (polyamic acid).
Among the foregoing invention embodiment, described silicon dioxide granule is Si ((NH
2R) SiO
3)
4, wherein R is that carbon number is 1 ~ 6 alkyl.
Among the foregoing invention embodiment, described silicon dioxide granule is to be formed on this organic material layer via a rotary coating mode.
Among the foregoing invention embodiment, described liquid crystal alignment layer can be applicable to the liquid crystal indicator of an optical compensation curved arrange type (OCB).
The present invention provides a kind of manufacturing approach of liquid crystal alignment layer in addition, comprises the following steps.At first, on a glass substrate, form an organic material layer; Afterwards, a plurality of silicon dioxide granules are formed on this organic material laminar surface, wherein respectively this silicon dioxide granule contains at least one amino (NH2) group.
Among the foregoing invention embodiment, described organic material layer is to be a polyimide (Polyimide) layer.
Among the foregoing invention embodiment, described organic material layer is the functional group who comprises a polyamic acid (polyamic acid).
Among the foregoing invention embodiment, described silicon dioxide granule is Si ((NH
2R) SiO
3)
4, wherein R is that carbon number is 1 ~ 6 alkyl.
Among the foregoing invention embodiment, described silicon dioxide granule is to be formed on this organic material layer via a rotary coating mode.
Among the foregoing invention embodiment, described liquid crystal alignment layer can be applicable to the liquid crystal indicator of an optical compensation curved arrange type (OCB).
For letting the above-mentioned feature and advantage of the present invention can be more obviously understandable, hereinafter is special lifts some embodiment, and cooperates appended graphicly, elaborates as follows.
Description of drawings
Fig. 1 is the partial structure synoptic diagram of the liquid crystal indicator of one embodiment of the invention.
[primary clustering symbol description]
10 liquid crystal indicators
20 glass substrates
21 liquid crystal alignment layers
30 liquid crystal layers.
Embodiment
Please refer to Fig. 1, Fig. 1 is the partial structure synoptic diagram of the liquid crystal indicator of one embodiment of the invention.Liquid crystal indicator 10 comprises a glass substrate 20, a liquid crystal alignment layer 21 and a liquid crystal layer 30; Wherein glass substrate 20 has a surface; Liquid crystal alignment layer 21 is to be formed on the surface of glass substrate 20, and wherein liquid crystal alignment layer 21 is for containing the organic material layer of a plurality of silicon dioxide granules.
In detail; These silicon dioxide granules are on being formed on the surface of organic material layer; Because these silicon dioxide granules contain at least one amino (NH2) group; Therefore amino group can carry out crosslinkedly with the polyamic acid (Polyamic acid) on the organic material layer, and these silicon dioxide granules are formed on the organic material layer.
Above-mentioned organic material layer can be a polyimide (Polyimide) layer, and silicon dioxide granule be for can be expressed as Si ((NH
2R) SiO
3)
4, wherein R is that carbon number is 1 ~ 6 alkyl, for instance, silicon dioxide granule can be Si ((NH
2C
3H
6) SiO
3)
4, like general formula (1) institute formula.
The generation type of silicon dioxide granule can see through the mode shown in the chemical formula (1), synthesizes to contain the amino (NH2) silicon dioxide granule of group.What need to specify is, be synthesized contain amino (NH2) silicon dioxide granule of group, its size be between 1 how rice to 999 scopes of rice how.
Chemical formula (1)
Contain amino (NH2) after the silicon dioxide granule of group when synthesizing; As long as (NH2) silicon dioxide granule of group and the polyamic acid on the organic material layer (Polyamic acid) react will to contain amino; Because amino (NH2) group meeting and polyamic acid (Polyamic acid) carry out cross-linking reaction; Therefore can these silicon dioxide granules be formed on the organic material layer, obtain liquid crystal alignment layer of the present invention.
The manufacturing approach of liquid crystal alignment layer of the present invention mainly comprises the following steps: at first, on a glass substrate 20, forms an organic material layer.Organic material layer described here can be general common polyimide (Polyimide) layer, or contains other organic material layer of polyamic acid (polyamic acid) functional group.Afterwards, (NH2) silicon dioxide granule of group and organic material laminar surface carry out crosslinkedly, promptly accomplish the manufacturing of liquid crystal alignment layer 21 with the above-mentioned amino that contains that is synthesized.
In detail, (NH2) silicon dioxide granule of group and organic material laminar surface carry out crosslinked process, can form like following described method to contain amino.At first, the silicon dioxide granule that is synthesized is utilized ultrasonic concussion, silicon dioxide granule is evenly disperseed.Simultaneously, utilize the mode of a rotary coating on a glass substrate 20, to be coated with the last layer organic material layer.Afterwards; The silicon dioxide granule that will be scattered in the ethanol utilizes the mode of a rotary coating to coat on the organic material layer; Because silicon dioxide granule contains amino (NH2) group; Therefore can carry out cross-linking reaction with the polyamic acid (Polyamic acid) on the organic material layer,, accomplish the manufacturing of liquid crystal alignment layer 21 so can these silicon dioxide granules be formed on the organic material layer.
Following special comparing embodiment and the embodiment of lifting; Relatively (NH2) (NH2) silicon dioxide granule of group is discussed its influence for response time and transition voltage and threshold voltage to the silicon dioxide granule of group with having variable concentrations amino when not having amino with liquid crystal alignment layer 21.
In following examples: the liquid crystal kind is an example with pure optical-compensation bent liquid crystal ZCE-5096; And organic material layer sees through the mode of a rotary coating machine and coats on the glass substrate 20; Wherein the composition of organic material layer is a polyimide layer (PIA-5580) and thinning agent (NBG-776) is the ratio of 3:1, and the precure condition of organic material layer is 110 ° of C, 30 minutes (min); 220 ° of C, 10 minutes (min).
And silicon dioxide granule coats that the mode on the organic material layer is a rotary coating mode on the organic material layer, and the slaking condition of its silicon dioxide granule is 110 ° of C, 20 minutes (min), 220 ° of C, 60 minutes (min).Here; Can be coated with the silicon dioxide granule of variable concentrations on the organic material layer; And the meaning of indication variable concentrations is here: be scattered in the concentration of the silicon dioxide granule in the alcohol solvent, below the silicon dioxide granule of enumerating 0%, 0.01%, 0.05%, 0.1% and 0.5% respectively be scattered in the experimental result in the ethanol.
At last, in the embodiment that contains different silicon dioxide granule concentration, inject liquid crystal ZCU-5096 respectively, by this, observe the response time and the transition voltage of liquid crystal.
Please refer to following table one and table two, wherein table one is for adding the transition voltage result of different proportion silicon dioxide granule, and table two is for adding the response time result of different proportion silicon dioxide granule.Result by table one and table two can learn that the blending top condition of silicon dioxide granule is concentration 0.1 %.When the silicon dioxide granule addition is a concentration when being 0.1%, its response time never 5.79 milliseconds (ms) of blending silicon dioxide granule speeds to 4.84 milliseconds (ms); Its transition voltage is reduced to 2.45 volts (V) by 3.50 volts (V) of blending silicon dioxide granule not.Therefore, the liquid crystal indicator that the silicon dioxide granule of interpolation low concentration is formed can effectively improve answer speed, reduces driving voltage.
Table one: the transition voltage that adds the OCB liquid crystal cell of different proportion silicon dioxide granule
| OCB cell | ? Cell gap (μm) | Vcr (V) |
| OCB cell without SiO 2 | 3.6 | 3.50 |
| OCB cell with 0.01 wt% SiO 2 | 3.6 | 2.80 |
| OCB cell with 0.05wt% SiO 2 | 3.7 | 2.45 |
| OCB cell with 0.1 wt% SiO 2 | 3.7 | 2.45 |
| OCB cell with 0.5 wt% SiO 2 | 3.7 | 2.39 |
Table two: the response time of adding the OCB liquid crystal cell of different proportion silicon dioxide granule
| ? | ? τon (ms) | τoff ? (ms) | ?τtotal (ms) |
| OCB cell without SiO 2 | 1.83 | 3.96 | 5.79 |
| OCB cell with 0.01 wt% SiO 2 | 1.84 | 3.98 | 5.82 |
| OCB cell with 0.05wt% SiO 2 | 1.78 | 3.91 | 5.69 |
| OCB cell with 0.1 wt% SiO 2 | 1.23 | 3.21 | 4.84 |
| OCB cell with 0.5 wt% SiO 2 | 1.34 | 3.56 | 4.90 |
Liquid crystal alignment layer of the present invention and its manufacturing approach utilize silicon dioxide granule and organic material layer surface reaction how to form Mi Peixiang, to reach answer speed and the driving voltage that improves optical compensation curved arrange type liquid crystal indicator.
Comparison sheet 1 and table 2 result learn; LCD alignment of the present invention; Really more general optical compensation curved arrange type liquid crystal indicator has reaction velocity faster, thus, can significantly reduce optical compensation tangent bend type liquid crystal indicator and when initial driving, be converted to required time of bending status and power supply supply from the divergence attitude; And can eliminate the wild effect between divergence attitude to the bending status, obtain than traditional liquid crystal indicator response effect faster.
Though the present invention discloses as above with some embodiment; Right its is not in order to limit the present invention; Has common knowledge the knowledgeable in the technical field under any; Do not breaking away from the spirit and scope of the present invention, when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.
Claims (8)
1. a liquid crystal alignment layer is characterized in that comprising: an organic material layer; And a plurality of silicon dioxide granules, be formed on this organic material layer, wherein respectively this silicon dioxide granule contains at least one amino (NH2) group; Wherein this organic material layer is the functional group who comprises a polyamic acid (polyamic acid).
2. liquid crystal alignment layer according to claim 1 is characterized in that: wherein this organic material layer is to be a polyimide (Polyimide) layer.
3. liquid crystal alignment layer according to claim 1 is characterized in that: wherein respectively this silicon dioxide granule is Si ((NH
2R) SiO
3)
4, wherein R is that carbon number is 1 ~ 6 alkyl; Described silicon dioxide granule is to be formed on this organic material layer via a rotary coating mode.
4. liquid crystal alignment layer according to claim 1 is characterized in that: wherein this liquid crystal alignment layer can be applied to the liquid crystal indicator of an optical compensation curved arrange type (OCB).
5. the manufacturing approach of a liquid crystal alignment layer is characterized in that comprising: on a glass substrate, form an organic material layer; And a plurality of silicon dioxide granules are formed on this organic material laminar surface, wherein respectively this silicon dioxide granule contains at least one amino (NH2) group; Wherein this organic material layer is the functional group who comprises a polyamic acid (polyamic acid).
6. the manufacturing approach of liquid crystal alignment layer according to claim 5 is characterized in that: wherein this organic material layer is to be a polyimide (Polyimide) layer.
7. the manufacturing approach of liquid crystal alignment layer according to claim 5, it is characterized in that: wherein respectively this silicon dioxide granule is Si ((RNH
2) SiO
3)
4, wherein R is that carbon number is 1 ~ 6 alkyl; Said silicon dioxide granule is to be formed on this organic material layer via a rotary coating mode.
8. the manufacturing approach of liquid crystal alignment layer according to claim 5, it is characterized in that: wherein this liquid crystal alignment layer can be applied to the liquid crystal indicator of an optical compensation curved arrange type (OCB).
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|---|---|---|---|
| CN2009103103899A CN101718927B (en) | 2009-11-25 | 2009-11-25 | Liquid crystal alignment layer and manufacturing method thereof |
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|---|---|---|---|
| CN2009103103899A CN101718927B (en) | 2009-11-25 | 2009-11-25 | Liquid crystal alignment layer and manufacturing method thereof |
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|---|---|
| CN101718927A CN101718927A (en) | 2010-06-02 |
| CN101718927B true CN101718927B (en) | 2012-06-13 |
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| CN103539811B (en) | 2012-07-12 | 2016-01-20 | 北京京东方光电科技有限公司 | Induce the compound of liquid crystal arrangement, method, display panels and display unit |
| CN102898833B (en) * | 2012-10-11 | 2014-09-17 | 京东方科技集团股份有限公司 | Alignment film material, alignment film and preparation method of alignment film, and liquid display device |
| JP6375774B2 (en) * | 2013-11-15 | 2018-08-22 | Jsr株式会社 | Method for manufacturing liquid crystal alignment film, substrate for liquid crystal display element and method for manufacturing the same, and liquid crystal display element |
| US9921442B2 (en) * | 2016-01-14 | 2018-03-20 | Omnivision Technologies, Inc. | Method for forming an alignment layer of a liquid crystal display device and display device manufactured thereby |
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Owner name: CHINA PROJECTION TUBE CO., LTD. Free format text: FORMER OWNER: FUZHOU HUAYING VIDEO + TELECOM CO., LTD. Effective date: 20130607 Free format text: FORMER OWNER: CHINA PROJECTION TUBE CO., LTD. Effective date: 20130607 |
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