CN101131510A - LCD material combination and LCD device containing the same - Google Patents
LCD material combination and LCD device containing the same Download PDFInfo
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- CN101131510A CN101131510A CNA2007101637040A CN200710163704A CN101131510A CN 101131510 A CN101131510 A CN 101131510A CN A2007101637040 A CNA2007101637040 A CN A2007101637040A CN 200710163704 A CN200710163704 A CN 200710163704A CN 101131510 A CN101131510 A CN 101131510A
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Abstract
This invention discloses a kind of liquid material compounding, includes a liquid (11) and a polymerizable monomer (13), the liquid has the following character: (I) the dielectric guidance quality Delta epsi which is minus 2.5 to minus 5; (II) the expansion elastic coefficient K11 which is 1.1 multiply 10 to the power minus 11 Newton to 1.6 multiply 10 to the power minus 11 Newton; (III) the bend elastic coefficient which is 1.1 multiply 10 to the power minus 11 Newton to 1.6 multiply 10 to the power minus 11 Newton; and (IV) Delta epsi, K11(Newton) accord with the upper formula; the liquid material compounding can be applied to the liquid display device LCD, provides a LCD with good penetrate rate.
Description
Technical Field
The present invention relates to a liquid crystal material composition that can be used in a Liquid Crystal Display (LCD). In particular, it relates to a liquid crystal material composition for polymer assisted alignment (PSA) LCD.
Background
Among various display devices, the LCD is the most sophisticated and popular display device, and compared with a conventional Cathode Ray Tube (CRT) display, the LCD has the advantages of light weight, power saving, portability, no radiation, and the like, and is widely used in 3C products such as mobile phones, digital cameras, notebook computers, and desktop displays.
When assembling an LCD, the liquid crystal material is an indispensable material, and its properties have a critical influence on the performance of the LCD. Generally, in terms of dielectric anisotropy (Δ ∈), liquid crystal materials can be classified into two types, namely, positive type liquid crystal (i.e., Δ ∈ > 0) and negative type liquid crystal (i.e., Δ ∈ < 0). Among them, the positive type liquid crystal is generally used for a Parallel Alignment (PA) mode LCD, and the negative type liquid crystal is used for a Vertical Alignment (VA) mode LCD.
In order to improve the performance of LCD, a technique for assisting liquid crystal alignment is proposed to generate a pretilt angle for liquid crystal molecules, so as to assemble LCD with the advantages of fast response and high contrast. One of the auxiliary liquid crystal alignment technologies is to add a polymerizable monomer into the liquid crystal material, and the monomer can make liquid crystal molecules generate a pretilt angle after polymerization, so as to achieve the effect of auxiliary liquid crystal alignment and improve the optical performance of the liquid crystal material. LCDs using such liquid crystal materials doped with polymerizable monomers are generally referred to as Polymer Sustained Alignment (PSA) LCDs.
However, as the LCD pixel structure becomes more complex, such as multi-domain pixel structure (multi-domain pixel structure), the LCD (especially PSA-LCD) is faced with the problem of reduced liquid crystal transmittance. In summary, due to the development of the multi-domain pixel structure, the equivalent electric field (effective electric field) under the same driving voltage is smaller and smaller, which causes the transmittance of the liquid crystal to decrease more and more when other conditions are maintained the same, thereby affecting the optical performance of the LCD.
In view of the above problems, the inventors of the present invention have found that by selecting a liquid crystal having specific parameter conditions and using a polymerizable monomer, a suitable liquid crystal material composition can be provided, which exhibits a desired transmittance when used in an LCD.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a liquid crystal material composition, wherein liquid crystal with specific parameter conditions is selected, and the use of polymerizable monomers is matched to improve the transmittance of LCD.
Another object of the present invention is to provide a liquid crystal display device comprising the above liquid crystal material combination.
In order to achieve the above object, the present invention provides a liquid crystal material composition comprising a liquid crystal and a polymerizable monomer, wherein the liquid crystal has the following properties:
(i) -a dielectric anisotropy (Δ ∈) from 2.5 to-5;
(ii)1.1×10 -11 newton to 1.6 x 10 -11 Newton's modulus of elasticity for expansion (K) 11 )；
(iii)1.1×10 -11 Newton to 1.6 x 10 -11 Newton's bending modulus of elasticity (K) 33 ) (ii) a And
(iv)Δε、K 11 (Newton) and K 33 (newtons) conform to the formula:
further, to achieve the above object, the present invention provides a liquid crystal display device comprising:
a first substrate;
a second substrate; and
a liquid crystal material assembly as described above sealed between the first substrate and the second substrate.
The invention is convenient to use by selecting the appliance K 11 、K 33 And delta epsilon, the penetration rate of the LCD is effectively improved.
The basic spirit and other objects of the present invention, as well as the technical means and preferred embodiments adopted by the present invention, will be readily understood by those skilled in the art after referring to the accompanying drawings and the embodiments described later.
Drawings
FIG. 1 is a diagram illustrating the comparison of transmittance with driving voltage by changing the parameters of liquid crystal material under the same LCD device structure conditions;
FIG. 2 is a schematic diagram of a first embodiment of a liquid crystal display device according to the present invention;
FIG. 3 is a schematic view of a second embodiment of a liquid crystal display device according to the present invention;
FIG. 4 is a schematic view of a third embodiment of a liquid crystal display device according to the present invention; and
FIG. 5 is a schematic view of a fourth embodiment of a liquid crystal display device according to the present invention.
Wherein, the reference numbers:
11: liquid crystal display device
13: polymerizable monomer
20, 30, 40, 50: liquid crystal display device having a plurality of pixel electrodes
23: cell gap
27: alignment structure
29: alignment film
211: first substrate
213: second substrate
251: a first electrode
253: second electrode
Detailed Description
It was found that, regardless of the parameters of the liquid crystal material used, the transmittance exhibited started to reach saturation after the driving voltage was increased to a certain level (about 10 volts). However, as mentioned above, due to the practical limitations of the current panels, the driving voltage that can be used is often not large enough to achieve the full transmittance of the liquid crystal. The foregoing phenomenon can be further explained by the graph of transmittance versus driving voltage of fig. 1. Under the condition of the same pixel structure and measurement mode, respectively for pixels with different K 11 、K 33 And a liquid crystal material LC1 (K) combining Delta epsilon properties 11 ＝K 33 ＝1.33×10 -11 Newton,. DELTA.. Epsilon. = -3.5) and LC2 (K) 11 ＝K 33 ＝1.33×10 -11 Newton, Δ ∈ = -3.1), it was found that the ratio of the transmittance of the two liquid crystal materials with the voltage rise was significantly different. In which, for a common driving voltage of 7.5 volts, the transmittance of LC2 is significantly higher than that of LC1 under the same driving voltage. Further research has revealed that the key parameter affecting the transmittance of liquid crystal material at the same driving voltage is K 11 、K 33 And Δ ε.
Accordingly, the present invention provides a liquid crystal material composition comprising a liquid crystal and a polymerizable monomer, whichWherein the liquid crystal has specific properties. In particular, the liquid crystal material of the present invention comprises a liquid crystal having a parameter K 11 、K 33 And Δ ε satisfies the following condition:
(i) Δ ε is-2.5 to-5:
(ii)K 11 is 1.1X 10 -11 Newton to 1.6 x 10 -11 Newton;
(iii)K 33 is 1.1X 10 -11 Newton to 1.6 x 10 -11 Newton; and
(iv)Δε、K 11 (Newton) and K 33 (newton) the relationship of the three conforms to the following formula:
according to the present invention, any liquid crystal having the above-mentioned properties can be used in conjunction with a polymerizable monomer in an LCD to provide a convenient transmittance, without any particular limitation. For example, but not limited thereto, the liquid crystal comprised by the combination of the invention may be selected from the group consisting of compounds having the following formulae (III), (IV), (V) or (VI):
wherein
R 1 、R 2 、R 3 、R 4 And R 6 Is independently an alkyl group having 1 to 12 carbon atoms, 1 or 2 non-adjacent CH's thereof 2 The groups may be substituted with-O-, -CH = CH-, -CO-, -OCO-, or-COO-and the oxygen atoms are not directly bonded to each other;
R 5 is alkenyl having 2 to 8 carbon atoms;
d is 0 or 1;
And
is independently as
In addition to liquid crystals, the liquid crystal material composition of the present invention also includes a polymerizable monomer. The amount of polymerizable monomer used can be selected by those skilled in the art as desired. Generally, the polymerizable monomer is used in an amount of 0.01 to 5 wt% based on the weight of the liquid crystal. Typically, the polymerizable monomers employed in the combinations of the present invention comprise photopolymerizable monomers, thermally polymerizable monomers, or combinations of the foregoing. For example, but not limited thereto, the polymerizable monomer may be selected from the group consisting of compounds having the following formula (I) or (II):
wherein
P 1 Independently a polymerizable group such as acrylate or methacrylate;
Sp 1 independently a spacer group (spacer), such as a straight carbon chain comprising at least one carbon;
X 1 independently of one another, -O-, -S-, -OCH 2 -、-CO-、-COO-、-OCO-、-CO-NR-、-NR-CO-、 -OCH 2 -、-SCH 2 -、-CH 2 S-, -CH = CH-COO-, -OCC-CH = CH-, or a single bond;
l is independently fluorine, chlorine, cyano, or an alkyl, alkylcarbonyl, alkoxycarbonyl, or alkylcarbonyloxy group having 1 to 7 carbon atoms, and m is not less than 1; when L is an alkyl, alkylcarbonyl, alkoxycarbonyl or alkylcarbonyloxy group having 1 to 7 carbon atoms, one or more hydrogen atoms therein may be replaced by fluorine atoms or chlorine atoms;
r is independently-H, -F, -Cl, -CN, -SCN, -SF 5 H、-NO 2 A single-or branched-chain alkyl group having 1 to 12 carbon atoms, or-X 2 -Sp 2 -P 2 (ii) a Wherein X 2 Independently of one another, -O-, -S-, -OCH 2 -、-CO-、 -COO-、-OCO-、-CO-NR-、-NR-CO-、-SCH 2 -、-CH 2 S-, -CH = CH-COO-, -OOC-CH = CH-, or a single bond; sp 2 Independently a spacer group, such as a straight carbon chain comprising at least one carbon.
In a preferred embodiment of the liquid crystal material composition of the invention, the liquid crystal is usedNumber K 11 、K 33 And Δ ε satisfies the following condition:
(i) Δ ε is-3 to-5;
(ii)K 11 is 1.1X 10 -11 Newton to 1.55 x 10 -11 Newton;
(iii)K 33 is 1.1X 10 -11 Newton to 1.55 x 10 -11 Newton; and
(iV)Δε、K 11 (Newton) and K 33 The relationship between the three (Newton) accords with the following formula:
in another preferred embodiment of the liquid crystal material composition of the invention, the parameter K of the liquid crystal is 11 、 K 33 And Δ ε satisfies the following condition:
(i) Δ ε is-3 to-5;
(ii)K 11 is 1.37X 10 -11 Newton to 1.6 x 10 -11 Newton;
(iii)K 33 is 1.37X 10 -11 Newton to 1.6 x 10 -11 Newton; and
(iv)Δε、K 11 (Newton) and K 33 The relationship between (newton) and (newton) corresponds to the following formula:
as mentioned above, the present invention provides a method for determining the values of the parameters (Δ ε, K) 11 And K 33 ) The selection of the combined liquid crystal provides a convenient combination of liquid crystal materials that, when applied to an LCD, enhances the optical performance of the LCD.
Based on this, the present invention also relates to a liquid crystal display device, especially a Polymer Sustained Alignment (PSA) liquid crystal display device. The liquid crystal display device of the present invention will be further described with reference to the accompanying drawings, wherein like reference numerals have the same meaning.
Referring first to FIG. 2, an embodiment of a liquid crystal display device 20 according to the present invention has a first substrate 211, a second substrate 213, and a liquid crystal material combination (including liquid crystal 11 and polymerizable monomer 13) sealed therebetween. Meanwhile, a first electrode 251 and a second electrode 253 are respectively disposed on the surfaces of the first substrate 211 and the second substrate 213 opposite to each other to provide an electric field for turning the liquid crystal 13. In fig. 2, the first electrode 251 may have an alignment structure 27 thereon for assisting alignment of the liquid crystal 11. It should be noted that, the alignment structure 27 may be disposed on the first electrode 251, the second electrode 253, or both the first electrode 251 and the second electrode 253 as required; the number of the arrangements is not particularly limited, and may be adjusted as necessary depending on the conditions of the panel and the desired quality. In addition, the alignment structure 27 may have any suitable shape, such as a trapezoid, a triangle, or a cone, when viewed in cross section. In the case of the triangular and pyramidal alignment structures 27, see the liquid crystal display devices 40 and 50 shown in FIG. 4 and FIG. 5, respectively. Of course, the present invention does not exclude the case where the alignment structure 27 is not used.
Referring to fig. 2, a liquid crystal material assembly composed of a liquid crystal 11 and a polymerizable monomer 13 is sealed between a first substrate 211 and a second substrate 211, which are separated by a predetermined distance, i.e., a cell gap (cell gap) 23. Generally, the size of the cell gap 23 is in the range of 2.5 microns to 10 microns.
According to the present invention, an alignment film may be optionally disposed to assist in alignment of the liquid crystal, as shown in FIG. 3. In fig. 3, the lcd device 30 further includes an alignment film 29 in addition to the first substrate 211, the second substrate 213, the liquid crystal material combination (including the liquid crystal 11 and the polymerizable monomer 13) sealed therebetween, the first electrode 251, and the second electrode 253. Here, the alignment film 29 may also coexist with the alignment structure 27 in fig. 2 in the liquid crystal display panel, if necessary. In addition, the alignment film 29 may be optionally disposed on the first electrode 251 and/or the second electrode 253. One commonly used alignment film material is Polyimide (PI).
In order to make the advantages and features of the present invention more apparent to those skilled in the art, the following examples are provided for further illustration.
Example 1
The liquid crystal materials 1 to 5 were selected and used for simulation of transmittance for vertical alignment mode LCD, and the expansion elastic coefficient (K) was observed 11 ) Torsional elastic modulus (K) 22 ) Bending modulus of elasticity (K) 33 ) The effect of parameters such as dielectric anisotropy (. DELTA.. Di-elect cons.) and viscosity coefficient (. Gamma.) on the permeability is shown in Table 1.
TABLE 1
| Liquid crystal display device | 1 | 2 | 3 | 4 | 5 |
| K 11 And K 33 (10 -11 Newton) | 1.5 | 1.1 | 1.5 | 1.5 | 1.5 |
| K 22 (10 -11 Newton) | 0.8 | 0.8 | 0.8 | 0.8 | 0.5 |
| Gamma (poise) | 0.11 | 0.11 | 0.11 | 0.14 | 0.11 |
| Δε | -3 | -3 | -3.5 | -3.5 | -3 |
| Penetration at 7 volts (%) | 24.1 | 23.9 | 24.1 | 24.0 | 24.0 |
| 4.2V lower garmentTransmittance (%) | 18.1 | 24.6 | 21.6 | 21.6 | 18.1 |
The results in Table 1 show that K is a comparative example 22 And gamma, K 11 、K 33 And delta epsilon can reflect the key parameter of the penetration rate of the liquid crystal material. In detail, from the results of the liquid crystals 1 and 5, it is known that K is the ratio 11 And K 33 Gamma and delta epsilon are constant values and have different Ks 22 Liquid crystal 1 and liquid crystal 5 (K) 22 0.8 and 0.5, respectively) at penetration (%) at 7 volts of 24.1 and 24.0, respectively; the penetration (%) at 4.2 volts was 18.1) and there was no substantial difference. From the results of the liquid crystals 3 and 4, it can be seen that K is the ratio 11 And K 33 、K 22 And Δ ∈ is constant, the liquid crystals 3 and 4 having different γ (γ is 0.11 and 0.14, respectively) exhibited no substantial difference in transmittance (%) at 7 volts is 24.1 and transmittance (%) at 4.2 volts is 21.6, respectively). In contrast, the liquid crystal display deviceComparison of 1 with liquid crystal 2 shows that if K 22 Gamma and delta epsilon are constant values with different Ks at low drive voltages (e.g., 4.2 volts) 11 And K 33 The liquid crystal 1 and the liquid crystal 2 have obvious difference in transmittance (%) of 18.1 and 24.6, respectively, and the liquid crystal 2 has better transmittance. In addition, according to the comparison between liquid crystal 1 and liquid crystal 3, if K is 11 And K 33 、K 22 And gamma is constant, the transmittance (%) of the liquid crystal 1 and the liquid crystal 3 (respectively-3 and-3.5) having different values of delta epsilon are substantially different at a low driving voltage (for example, 4.2 volts), respectively, 18.1 and 21.6, and the liquid crystal 3 exhibits a higher transmittanceIt is preferred.
As can be seen from example 1, when the liquid crystal parameter K is fixed 22 Gamma and delta epsilon, liquid crystal parameter K 11 And K 33 The liquid crystal display performance on the transmittance can be influenced; while fixing the liquid crystal parameter K 11 And K 33 、K 22 And gamma, the liquid crystal parameter delta epsilon influences the liquid crystal display performance on the transmittance.
Example 2
The LCD having the structure shown in fig. 3 was tested, with respect to the liquid crystal 11, and the remaining assembly conditions were unchanged.
If liquid crystal 1 is used as liquid crystal 11, and the parameters of liquid crystal 1 are: Δ ε = -3, K 11 ＝1.52×10 -11 Newton, and K 33 ＝1.55×10 -11 Newton, then the assembled LCD was optically measured using a transmittance meter, and the results are shown in table 2 (liquid crystal 1).
If liquid crystal 2 is used as liquid crystal 11, and the parameters of liquid crystal 2 are: delta epsilon = -3, K 11 ＝1.37×10 -11 Newton, and K 33 ＝1.41×10 -11 Newton, then the assembled LCD was optically measured using a transmittance meter, and the results are shown in table 2 (liquid crystal 2).
If liquid crystal 3 is used as liquid crystal 11, and the parameters of liquid crystal 3 are: delta epsilon = -3.5, K 11 ＝1.52×10 -11 Newton, and K 33 ＝1.5×10 -11 Newton's measurements were performed on the assembled LCD using a transmittance meter, and the results are shown in Table 2 (liquid crystal 3).
Table 2:
| LC | liquid crystal 1 | |
|
| Δε | -3 | -3 | -3.5 |
| K 11 | 15.2 | 13.7 | 15.2 |
| K 33 | 15.5 | 14.1 | 15 |
| T(％) | 3.70 | 3.90 | 4.40 |
As shown in Table 2, when Δ ε is fixed, parameter K is calculated by comparing liquid crystal 1 with liquid crystal 2 11 、 K 33 Liquid crystal 2 ratio parameter K of 13.7 and 14.1 respectively 11 、K 33 The liquid crystal 1 of 15.2 and 15.5 respectively had better expression of the transmittance (%), and the transmittance (%) of the liquid crystal 2 was 3.9, but the transmittance (%) of the liquid crystal 1 was 3.7. According to the liquid crystal1 and liquid Crystal 3 comparison, when K is fixed 11 Time, parameter Deltaε, K 33 Liquid crystal 3 ratio parameters Δ ε, K of-3.5 and 15, respectively 33 The liquid crystal 1 of-3 and 15.5 respectively had better expression of the transmittance (%), and the transmittance (%) of the liquid crystal 3 was 4.4, but the transmittance (%) of the liquid crystal 1 was 3.7.
As can be seen from example 2, by selecting an appropriate K 11 、K 33 And delta epsilon, the transmittance of the LCD can be effectively improved.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (10)
1. A liquid crystal material composition comprising a liquid crystal and a polymerizable monomer, wherein the liquid crystal has the following properties:
(i) -a dielectric anisotropy Δ ∈ ranging from 2.5 to-5;
(ii)1.1×10 -11 newton to 1.6 x 10 -11 Newton's coefficient of expansion elasticity K 11 ；
(iii)1.1×10 -11 Newton to 1.6 x 10 -11 Newton bending modulus of elasticity K 33 (ii) a And
(iv)Δε、K 11 and K 33 Conforms to the formula:
2. a liquid crystal material composition according to claim 1 wherein the polymerizable monomer comprises a photopolymerizable monomer, a thermally polymerizable monomer, or a combination thereof.
3. A liquid crystal material composition according to claim 1, characterized in that the polymerizable monomer is used in an amount of 0.01 to 5% by weight, based on the weight of the liquid crystal.
4. A combination of liquid crystal materials according to claim 1, characterized in that Δ ε is-3 to-3.5 and K 11 And K -33 Independently is 1.1X 10 -11 Newton to 1.55 x 10 -11 Newton.
5. A combination of liquid crystal materials according to claim 1, characterized in that Δ ∈ is from-3.0 to-5.
6. A combination of liquid crystal materials according to claim 1, characterized in that K 11 Is 1.37X 10 -11 Newton to 1.6 x 10 -11 Newton.
7. A combination of liquid crystal materials according to claim 1, characterized in that K 33 Is 1.37X 10 -11 Newton to 1.6 x 10 -11 Newton.
8. A liquid crystal display device, comprising:
a first substrate;
a second substrate; and
a liquid crystal material composition according to claim 1 sealed between said first substrate and said second substrate.
9. The liquid crystal display device according to claim 8, wherein the predetermined cell gap between the first substrate and the second substrate is 2.5 to 10 μm.
10. The liquid crystal display device of claim 8, wherein a polymer assisted alignment liquid crystal display device.
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| CNA2007101637040A CN101131510A (en) | 2007-10-11 | 2007-10-11 | LCD material combination and LCD device containing the same |
| CN2008100078104A CN101320155B (en) | 2007-10-11 | 2008-02-19 | Liquid crystal, LCD material combination containing the same and LCD device |
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| CNA2007101637040A CN101131510A (en) | 2007-10-11 | 2007-10-11 | LCD material combination and LCD device containing the same |
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| CN2008100078104A Active CN101320155B (en) | 2007-10-11 | 2008-02-19 | Liquid crystal, LCD material combination containing the same and LCD device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102219876A (en) * | 2010-04-14 | 2011-10-19 | 统炀企业有限公司 | Macromolecular liquid crystal alignment polymer and method for manufacturing liquid crystal display device by utilizing same |
| CN105511131A (en) * | 2015-12-01 | 2016-04-20 | 友达光电股份有限公司 | Liquid crystal display panel |
| CN108034434A (en) * | 2017-12-19 | 2018-05-15 | 深圳市华星光电技术有限公司 | The production method of thermal polymerization auto-orientation liquid crystal material and liquid crystal display panel |
| JP2020067620A (en) * | 2018-10-26 | 2020-04-30 | Dic株式会社 | Vertical alignment liquid crystal display element |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102732265B (en) * | 2012-06-15 | 2014-04-09 | 深圳市华星光电技术有限公司 | Liquid crystal medium composition for liquid crystal display |
| TWI628265B (en) * | 2014-10-08 | 2018-07-01 | 友達光電股份有限公司 | Liquid crystal display panel and manufacturing method thereof |
| US20180282623A1 (en) * | 2015-11-19 | 2018-10-04 | Dic Corporation | Liquid-crystal composition, liquid-crystal display element, and liquid-crystal display |
-
2007
- 2007-10-11 CN CNA2007101637040A patent/CN101131510A/en active Pending
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2008
- 2008-02-19 CN CN2008100078104A patent/CN101320155B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102219876A (en) * | 2010-04-14 | 2011-10-19 | 统炀企业有限公司 | Macromolecular liquid crystal alignment polymer and method for manufacturing liquid crystal display device by utilizing same |
| CN105511131A (en) * | 2015-12-01 | 2016-04-20 | 友达光电股份有限公司 | Liquid crystal display panel |
| CN108034434A (en) * | 2017-12-19 | 2018-05-15 | 深圳市华星光电技术有限公司 | The production method of thermal polymerization auto-orientation liquid crystal material and liquid crystal display panel |
| JP2020067620A (en) * | 2018-10-26 | 2020-04-30 | Dic株式会社 | Vertical alignment liquid crystal display element |
| JP7183697B2 (en) | 2018-10-26 | 2022-12-06 | Dic株式会社 | Vertically aligned liquid crystal display element |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101320155A (en) | 2008-12-10 |
| CN101320155B (en) | 2010-08-18 |
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