CN102485808B - Polymerizable composition, backlight module and liquid crystal display - Google Patents
Polymerizable composition, backlight module and liquid crystal display Download PDFInfo
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- CN102485808B CN102485808B CN201010578955.7A CN201010578955A CN102485808B CN 102485808 B CN102485808 B CN 102485808B CN 201010578955 A CN201010578955 A CN 201010578955A CN 102485808 B CN102485808 B CN 102485808B
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Abstract
The invention provides a polymerizable composition, comprising (a) at least a monomer compound selected from a group consisting of compounds represented by formula I and formula II and a (b) photoinitiator. The polymerizable composition can form a brightness enhancement film having a satisfactory luminance. In addition, the invention provides a backlight module having the brightness enhancement film and a liquid crystal display.
Description
Technical field
The present invention relates to field of liquid crystal, particularly a kind of ultraviolet polymerisable compound, and backlight module and the liquid crystal display of utilizing this ultraviolet polymerisable compound to prepare.
Background technology
Liquid crystal display (Liquid Crystal Display, LCD) with light, thin, short, little, low heat consumption, low power consumption, the advantage such as radiationless, progressively replace conventional cathode ray tube display, and be widely used in electroluminescent panel, laptop computer, word processor, both desktop monitors, televisor, video camera etc.Generally speaking, the primary structure of liquid crystal display is comprised of panel and backlight module two large divisions, faceplate part comprises electro-conductive glass, liquid crystal, alignment film, colored filter, polaroid, drive integrated circult etc., and backlight module comprises fluorescent tube, light guide plate and various bloomings etc.Liquid crystal panel itself is not luminous, and therefore the backlight module as brightness source is the significant components of LCD Presentation Function, and wherein, blooming has more been played the part of important role on screen intensity, uniformity coefficient, contrast and visual angle.
Polymerisable compound has determined the efficiency of brightness enhancement film.Thereby, need a kind of novel polymerisable compound can form gratifying brightness enhancement film.
Summary of the invention
Object of the present invention is intended at least solve one of above-mentioned technological deficiency.
For achieving the above object, one aspect of the present invention has proposed a kind of polymerisable compound, and it,, after being subject to ultraviolet ray irradiation, can solidify to form the coating with prism decorative pattern, and this coating can be used as brightness enhancement film, and it has gratifying brightness value.
For this reason, according to embodiments of the invention, disclose a kind of polymerisable compound, it comprises,
(a) at least one monomeric compound, the group that it selects compound that free style I and formula II represent to form:
Formula I
Formula II
Wherein, R
1=H or
R
2=H or
R
3=H or
R
4=H or
Prerequisite is R
1and R
2when different, be H, R
3and R
4when different, be H,
X
1, X
2, X
3and X
4be H or C independently of one another
1-C
5alkyl,
Y
1, Y
2, Y
3, Y
4, Z
1, Z
2, Z
3and Z
4be H ,-OH or C independently of one another
1-C
5alkyl;
M, n, m
1and n
1be selected from independently of one another 1 to 6 integer; With
(b) light trigger.
On the other hand, the invention provides a kind of backlight module, it has the brightness enhancement film being formed by aforementioned polymerizable compositions.The brightness enhancement film of this backlight module has gratifying brightness value, can improve the brightness of liquid crystal display.
Another aspect, the invention provides a kind of liquid crystal display, and it has aforesaid backlight module, thereby has gratifying brightness.
The aspect that the present invention is additional and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Embodiment
Describe embodiments of the invention below in detail, embodiment is exemplary, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
Disclosing below provides many different embodiment or example to be used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the present invention.In addition, the various specific technique the invention provides and the example of material, but those of ordinary skills can recognize the property of can be applicable to of other techniques and/or the use of other materials.In addition, First Characteristic described below Second Characteristic it " on " structure can comprise that the first and second Characteristics creations are for the direct embodiment of contact, also can comprise the embodiment of other Characteristics creation between the first and second features, such the first and second features may not be direct contacts.
On the one hand, according to some embodiments of the present invention, provide a kind of polymerisable compound, it comprises (a) at least one monomeric compound; (b) light trigger.The polymerizable compositions of the embodiment of the present invention, after being subject to ultraviolet ray irradiation, can solidify to form the coating with prism decorative pattern, and this coating can be used as brightness enhancement film, and it has gratifying brightness value.
Respectively monomeric compound of the present invention and light trigger are described below.
Monomeric compound
According to embodiments of the invention, the group that monomeric compound selects compound that free style I and formula II represent to form:
Formula I
Formula II
Wherein, R
1=H or
R
2=H or
R
3=H or
R
4=H or
Prerequisite is R
1and R
2when different, be H, R
3and R
4when different, be H,
X
1, X
2, X
3and X
4be H or C independently of one another
1-C
5alkyl,
Y
1, Y
2, Y
3, Y
4, Z
1, Z
2, Z
3and Z
4be H ,-OH or C independently of one another
1-C
5alkyl;
M, n, m
1and n
1be selected from independently of one another 1 to 6 integer.
Term " the C that used in the present invention
1-C
5alkyl " refer to that carbon number is straight chain or the branched alkyl of 1-5, includes but not limited to: methyl, ethyl, propyl group, isopropyl, normal-butyl, isobutyl, the tert-butyl group, sec-butyl, 1-n-pentyl, 2-n-pentyl, 3-n-pentyl, isopentyl etc.
According to embodiments of the invention R
1and R
2when different, be H, R
3and R
4when different, be H, thereby can be dinaphthalene diacrylate according to the monomeric compound of the embodiment of the present invention, or dinaphthalene mono acrylic ester.
According to embodiments of the invention, monomeric compound can be the compound that a kind of formula I or formula II represent, can be also the combination of the compound that represents of two kinds or more kinds of formula I or formula II.
According to some embodiments of the present invention, monomeric compound can be following at least one:
Formula I
1;
Formula I
2;
Formula II
1;
Formula II
2.
The content of monomeric compound in polymerisable compound is not particularly limited.According to some embodiments of the present invention, the general assembly (TW) based on polymerisable compound, the content of monomeric compound in described polymerisable compound is 5-15 % by weight.According to concrete examples more of the present invention, the general assembly (TW) based on polymerisable compound, the content of monomeric compound in described polymerisable compound is 12-15 % by weight, preferably 12.5-14.5 % by weight.
Light trigger
The term using in the present invention " light trigger " refers to and can produce free radical after UV-irradiation, and passes through the material of the transmission polyreaction of free radical, and it can cause above-mentioned monomeric compound polymerization reaction take place.
The kind of initiating agent does not have specific (special) requirements.According to some embodiments of the present invention, the light trigger of employing is selected from following at least one: benzophenone, diphenylhydroxyethanone, benzil, 1-hydroxy cyclohexyl phenylketone (I184), monoacyl phosphine oxide and two acylphosphine oxides etc.These light triggers are all commercially available.For example, monoacyl phosphine oxide or two acylphosphine oxide light trigger can obtain as follows: with trade name " Lucirin TPO " purchased from 2 of BASF AG's (being positioned at North Carolina, USA Charlotte city), 4,6-trimethylbenzoyl diphenyl phosphine oxide; Ethyl-2 with trade name " Lucirin TPO-L " purchased from BASF AG, 4,6-trimethylbenzoyl phenyl phosphinate (ethyl-2,4,6-trimethylbenzoylphenyl phosphinate); And with trade name " Irgacure 819 " two (2,4,6-the trimethylbenzoyl)-phenyl phosphine oxides purchased from Ciba company.In a concrete example of the present invention, adopt 2-hydroxy-2-methyl-1-phenyl-propyl-1-ketone as light trigger, its can trade name Darocur 1173 purchased from Ciba company.In concrete examples more of the present invention, can use the product of direct market purchase as light trigger, for example Darocur 4265, Irgacure 651, Irgacure 1800, Irgacure 369, Irgacure 1700 and Irgacure 907.In a concrete example, use 1-hydroxy cyclohexyl phenylketone (I184) as light trigger.
According to embodiments of the invention, the content of light trigger is not subject to special restriction.According to concrete example of the present invention, in the general assembly (TW) of polymerisable compound, the content of light trigger is 0.1 % by weight to 6 % by weight.
Optional member
According to embodiments of the invention, polymerisable compound of the present invention can also contain other optional compositions, so that composition of the present invention can have additional effect, improves physics or the chemical property of this polymerisable compound.
According to embodiments of the invention, the optional member that can add comprises crosslinking chemical, thinning agent, inorganic filler, antistatic agent etc.Be described respectively below.
Crosslinking chemical
According to embodiments of the invention, can adopt and there is at least two (methyl) acrylate-based monomer as crosslinking chemical.It can make the large molecule of line style or slight branched chain type form tridimensional network, improves film hardness, temperature tolerance, wearing quality etc.According to embodiments of the invention, the crosslinking chemical using includes but not limited to acrylic ester compound, such as polyester acrylate, epoxy acrylate, Epoxy Phenolic Acrylates, hexanediol diacrylate, three (methyl) acrylic acid pentaerythritol ester, four (methyl) acrylic acid pentaerythritol ester, trimethylolpropane tris (methyl) acrylate, ethoxylated trimethylolpropane three (methyl) acrylate, three (methyl) acrylic acid glyceride and propoxylation three (methyl) acrylic acid pentaerythritol ester etc.Certainly, a kind of crosslinking chemical can be used, or the combination of two kinds or more kinds of crosslinking chemicals can be used.According to embodiments of the invention, use functionality to be at least 2 crosslinking chemical.In addition, inventor's discovery, methacrylate based reactivity is lower than acrylate-based reactivity, and therefore according to embodiments of the invention, crosslinking chemical is containing methacrylate functional.
According to embodiments of the invention, the content of crosslinking chemical is not particularly limited.In one embodiment of the invention, the total amount based on polymerisable compound, the content of crosslinking chemical is 2 % by weight-25 % by weight.Content of crosslinking agent too much can cause refractive index to reduce.
Thinning agent
In addition, can also add thinning agent for avoiding the molecular weight of polymerisable compound too high, the viscosity of generation is too large, so that operability variation, has the shortcomings such as levelability is bad while being easy to be coated with, and affects the performance after its film-forming.According to embodiments of the invention, operable thinning agent includes but not limited to: (methyl) acrylate, 2-phenoxyethyl acrylate, adjacent phenyl benzene ethoxyethyl group acrylate, trimethylolpropane triacrylate, 2-(p-cumenyl-phenoxy group)-ethyl propylene acid esters (cumyl phenoxyl ethyl acrylate), the third oxidation neopentylglycol diacrylate, ethoxyquin trimethylolpropane triacrylate, the third oxidation trimethylolpropane triacrylate, dipentaerythritol acrylate (DPHA), and their combination in any.According to a concrete example of the present invention, described thinning agent is adjacent phenyl benzene ethoxyethyl group acrylate.
According to embodiments of the invention, the content of thinning agent is not particularly limited.In one embodiment of the invention, the total amount based on polymerisable compound, the content of thinning agent is 25 % by weight to 80 % by weight.
Inorganic filler
Add inorganic filler and can improve the hardness of solidifying rear coating that composition forms, also there is the effect that promotes panel of LCD briliancy (brightness).According to embodiments of the invention, operable inorganic filler includes but not limited to: titania (TiO
2), silicon dioxide (SiO
2), zinc paste (ZnO), barium sulphate (BaSO
4), calcium carbonate (CaCO
3), zirconia (ZrO
2) and their combination in any.According to embodiments of the invention, adopt silicon dioxide, zirconia, titania as inorganic filler.According to embodiments of the invention, the particle diameter of inorganic filler is approximately 0.01 micron to 200 microns.In concrete example, described particle diameter is 0.02 micron to 100 microns.
Antistatic agent
In addition, can also in polymerisable compound, add antistatic agent, make it have anlistatig effect, thereby improve operation yield.According to embodiments of the invention, spendable antistatic agent includes but not limited to: ethoxy fatty acid glyceride, quaternary ammonium compound, aliphatic amine derivative, epoxy resin (as polyethylene oxide), siloxane or other alcohol derivatives (as PVOH ester or polyglycol ether) and combination in any thereof.
According to a further aspect in the invention, also provide backlight module, on it, be formed with brightness enhancement film.Described brightness enhancement film is formed by above-mentioned polymerisable compound.Can for example, by being coated on according to the polymerisable compound of the embodiment of the present invention on base material (can be polyethylene terephthalate (PET)), by ultraviolet rays, irradiate and form the coating with prism decorative pattern, can obtain the brightness enhancement film that polymerisable compound forms.And then, by with comprise fluorescent tube, light guide plate and various other known optical films etc. and prepare backlight module in interior conventional foresight combination.According to embodiments of the invention, the thickness of brightness enhancement film is 15-25 micron, and according to a concrete example, the thickness of brightness enhancement film is 20 microns.In the present invention, the condition that ultraviolet ray is irradiated is not particularly limited, as long as can form brightness enhancement film.According to one embodiment of present invention, by dosage, be 300J/m
2ultraviolet rays irradiate and form the coating with prism decorative pattern.The brightness enhancement film forming thus has gratifying brightness value, can improve the brightness of liquid crystal display.
According to another aspect of the invention, the invention provides a kind of liquid crystal display, it has aforesaid backlight module.On this backlight module, be formed with brightness enhancement film, described brightness enhancement film is formed by above-mentioned polymerisable compound.The brightness enhancement film forming thus has gratifying brightness value, can improve the brightness of liquid crystal display.Thereby, according to the liquid crystal display of the embodiment of the present invention, there is gratifying brightness.
Embodiment 1
The material using in this embodiment is as follows:
(a): formula (I
1) compound
(b): light trigger I184
(c): crosslinking aid S R351
(d): thinning agent (adjacent phenyl benzene ethoxyethyl group acrylate)
According to table 1, prepare raw material, above-mentioned raw materials is mixed, and be stirred in 50 ℃ of heating the colloidal polymer that forms a kind of homogeneous transparent.The above-mentioned colloidal state polymer preparing is coated on polyethylene terephthalate (PET) base material, irradiates the coating that solidify to form tool prism decorative pattern with ultraviolet rays, the thickness that obtains being formed by this polymerisable compound is the brightness enhancement film of 20 microns.
Table 1
Brightness enhancement film prepared by above-mentioned each experimental example is placed in backlight module, utilizes BM-7 brightness photometer to carry out briliancy test.The brightness enhancement film of the tool prism decorative pattern that the polymerisable compound that the refractive index that consequently Dehua provides is simultaneously 1.56 forms is as positive control example 4.Test result is as shown in table 2.
Table 2
| Experimental example/reference examples | Briliancy |
| 1 | 3595 |
| 2 | 3646 |
| 3 | 3683 |
| 4 (reference examples) | 3586 |
Embodiment 2
The material using in this embodiment is as follows:
(a): formula (I
2) compound
(b): light trigger I184
(c): crosslinking aid S R351
(d): thinning agent (adjacent phenyl benzene ethoxyethyl group acrylate)
According to table 3, prepare raw material, prepare brightness enhancement film and backlight module, and carry out briliancy test according to the identical method of embodiment 1, result is as shown in table 4.
Table 3
Table 4
| Experimental example/reference examples | Briliancy |
| 5 | 3611 |
| 6 | 3637 |
| 7 | 3668 |
| 4 (reference examples) | 3586 |
Embodiment 3
The material using in this embodiment is as follows:
(a): formula (II
1) compound
(b): light trigger I184
(c): crosslinking aid S R351
(d): thinning agent (adjacent phenyl benzene ethoxyethyl group acrylate)
According to table 5, prepare raw material, prepare brightness enhancement film and backlight module, and carry out briliancy test according to the identical method of embodiment 1, result is as shown in table 6.
Table 5
Table 6
| Experimental example/reference examples | Briliancy |
| 8 | 3605 |
| 9 | 3655 |
| 10 | 3685 |
| 4 (reference examples) | 3586 |
Embodiment 4
The material using in this embodiment is as follows:
(a): formula (II
2) compound
(b): light trigger I184
(c): crosslinking aid S R351
(d): thinning agent (adjacent phenyl benzene ethoxyethyl group acrylate)
According to table 7, prepare raw material, prepare brightness enhancement film and backlight module, and carry out briliancy test according to the identical method of embodiment 1, result is as shown in table 8.
Table 7
Table 8
| Embodiment/reference examples | Briliancy |
| 11 | 3608 |
| 12 | 3649 |
| 13 | 3678 |
| 4 (reference examples) | 3586 |
To sum up, according to the result shown in table 2,4,6 and 8, utilize the brightness value of brightness enhancement film prepared by the polymerisable compound of the embodiment of the present invention and backlight module will be much larger than the brightness value of positive control example 4.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is by claims and be equal to and limit.
Claims (11)
1. a polymerisable compound, it comprises,
(a) at least one monomeric compound, it is formula I
2the compound representing, or formula I
2the combination of the compound representing with formula II:
Wherein,
R
3=H or
R
4=H or
Prerequisite is R
3and R
4when different, be H,
X
3and X
4be H or C independently of one another
1-C
5alkyl,
Y
3, Y
4, Z
3and Z
4be H ,-OH or C independently of one another
1-C
5alkyl;
M
1and n
1be selected from independently of one another 1 to 6 integer; With
(b) light trigger.
2. polymerisable compound according to claim 1, wherein, the content of described monomeric compound is at least 0.5 % by weight of described polymerisable compound general assembly (TW).
3. polymerisable compound according to claim 1, wherein, described monomeric compound is selected from:
4. polymerisable compound according to claim 1, wherein, the content of described light trigger is 0.1 % by weight to 6 % by weight of described polymerisable compound general assembly (TW).
5. polymerisable compound according to claim 1, wherein, described light trigger is to be selected from following at least one: benzophenone, diphenylhydroxyethanone, benzil, 1-hydroxy cyclohexyl phenylketone, monoacyl phosphine oxide, two acylphosphine oxide.
6. polymerisable compound according to claim 5, wherein, described light trigger is 1-hydroxy cyclohexyl phenylketone.
7. polymerisable compound according to claim 1, wherein, also contains crosslinking chemical.
8. polymerisable compound according to claim 1, wherein, the content of described crosslinking chemical is the 2-25 % by weight of described polymerisable compound general assembly (TW).
9. polymerisable compound according to claim 1, wherein, also contains and is selected from following at least one: thinning agent, inorganic filler, antistatic agent.
10. a backlight module, it has the brightness enhancement film that the polymerisable compound by claim 1-9 any one forms.
11. 1 kinds of liquid crystal display, it has backlight module claimed in claim 10.
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|---|---|---|---|
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|---|---|---|---|
| CN201010578955.7A CN102485808B (en) | 2010-12-02 | 2010-12-02 | Polymerizable composition, backlight module and liquid crystal display |
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| CN102485808B true CN102485808B (en) | 2014-12-10 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1844986A (en) * | 2005-04-08 | 2006-10-11 | 长兴化学工业股份有限公司 | Polymerizable composition with high refractive index and uses thereof |
| CN1902246A (en) * | 2003-12-30 | 2007-01-24 | 3M创新有限公司 | Polymerizable composition for optical articles |
| CN101792500A (en) * | 2009-10-09 | 2010-08-04 | 长兴化学工业股份有限公司 | Polymerizable composition and optical film comprising same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100053275A (en) * | 2008-11-12 | 2010-05-20 | 동우 화인켐 주식회사 | Uv curable resin composition, prism sheet of the same, and backlight unit and liquid crystal display device using the sheet |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1902246A (en) * | 2003-12-30 | 2007-01-24 | 3M创新有限公司 | Polymerizable composition for optical articles |
| CN1844986A (en) * | 2005-04-08 | 2006-10-11 | 长兴化学工业股份有限公司 | Polymerizable composition with high refractive index and uses thereof |
| CN101792500A (en) * | 2009-10-09 | 2010-08-04 | 长兴化学工业股份有限公司 | Polymerizable composition and optical film comprising same |
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Address after: 518119 Guangdong province Shenzhen City Dapeng new Kwai town Yanan Road No. 1 building experimental Byd Co Patentee after: Shenzhen helitai photoelectric Co., Ltd Address before: 518119 Guangdong province Shenzhen City Dapeng new Kwai town Yanan Road No. 1 building experimental Byd Co Patentee before: SHENZHEN BYD ELECTRONIC COMPONENT Co.,Ltd. |