CN1361228A - High polymer liquid crystal for liquid crystal display device - Google Patents
High polymer liquid crystal for liquid crystal display device Download PDFInfo
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- CN1361228A CN1361228A CN 00137432 CN00137432A CN1361228A CN 1361228 A CN1361228 A CN 1361228A CN 00137432 CN00137432 CN 00137432 CN 00137432 A CN00137432 A CN 00137432A CN 1361228 A CN1361228 A CN 1361228A
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- Prior art keywords
- liquid crystal
- polymer
- strong dielectricity
- crystal display
- strong
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 159
- 239000005264 High molar mass liquid crystal Substances 0.000 title 1
- 229920000642 polymer Polymers 0.000 claims abstract description 60
- 239000000203 mixture Substances 0.000 claims description 20
- 239000000975 dye Substances 0.000 claims description 17
- 239000000126 substance Substances 0.000 claims description 8
- JHPBZFOKBAGZBL-UHFFFAOYSA-N (3-hydroxy-2,2,4-trimethylpentyl) 2-methylprop-2-enoate Chemical compound CC(C)C(O)C(C)(C)COC(=O)C(C)=C JHPBZFOKBAGZBL-UHFFFAOYSA-N 0.000 claims description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 2
- 239000000178 monomer Substances 0.000 claims description 2
- 238000006116 polymerization reaction Methods 0.000 claims description 2
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical group OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 abstract description 17
- 238000002156 mixing Methods 0.000 abstract description 11
- 230000003287 optical effect Effects 0.000 abstract description 5
- 239000002131 composite material Substances 0.000 abstract 2
- 229920000058 polyacrylate Polymers 0.000 abstract 1
- 229920000193 polymethacrylate Polymers 0.000 abstract 1
- 238000002425 crystallisation Methods 0.000 description 7
- 230000008025 crystallization Effects 0.000 description 7
- 230000008021 deposition Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- SAPGBCWOQLHKKZ-UHFFFAOYSA-N 6-(2-methylprop-2-enoyloxy)hexyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCCCCCOC(=O)C(C)=C SAPGBCWOQLHKKZ-UHFFFAOYSA-N 0.000 description 6
- 239000004988 Nematic liquid crystal Substances 0.000 description 6
- DAKWPKUUDNSNPN-UHFFFAOYSA-N Trimethylolpropane triacrylate Chemical compound C=CC(=O)OCC(CC)(COC(=O)C=C)COC(=O)C=C DAKWPKUUDNSNPN-UHFFFAOYSA-N 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000000007 visual effect Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000002834 transmittance Methods 0.000 description 5
- 230000010287 polarization Effects 0.000 description 4
- 230000002269 spontaneous effect Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000004040 coloring Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- YCLAMANSVUJYPT-UHFFFAOYSA-L aluminum chloride hydroxide hydrate Chemical compound O.[OH-].[Al+3].[Cl-] YCLAMANSVUJYPT-UHFFFAOYSA-L 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 210000002858 crystal cell Anatomy 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000010748 Photoabsorption Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Liquid Crystal Substances (AREA)
- Liquid Crystal (AREA)
Abstract
The polymer composite liquid crystal for LCD consists of strong dielectric or-non-dielectric liquid crystal in 40% or below and polymer in 60% or over, and the polymer is urethane-acrylate oligomer, polyacrylate or polymethacrylate. The polymer composite liquid crystal had reduced liquid crystal mixing ratio, fast response, high optical stability and high contrast.
Description
The present invention relates to a kind of polymer built-up type liquid crystal (PALC:Polymer Assemble Liquid Crystal) that is used for liquid-crystal display.In more detail, be that strong dielectricity liquid crystal of a kind of use and non-strong dielectricity liquid crystal reduce high molecular liquid crystal ratio of mixture, the polymer built-up type liquid crystal that response speed is fast, optical stability is high, contrast gradient is better.
Liquid-crystal display is a kind ofly to inject liquid crystal material between one group of mutually corresponding glass substrate, and applies voltage from the outside, utilizes the display unit of the electron-optical properties show image of liquid crystal.The kind of liquid-crystal display comprises the torsional mode liquid crystal (twistnematic that utilizes nematic liquid crystal (nematic crystal), TN), super torsional mode liquid crystal (super twist nematic, STN), voltage control double refraction (ECB:electrically controllable birefringence) liquid-crystal display (LCD), membrane transistor (TFT) LCD, and utilize liquid crystal dispersive polymer in polymer to disperse formula LCD.
Utilize in the conventional liquid-crystal display of nematic liquid crystal,, all be to use two Polarizers, so the consume of light source is many, cause the problem of luminance shortage no matter be widely used TN LCD or STN LCD.More because liquid crystal can be toward the certain orientation orientation, so narrow viewing angle.
On the other hand, form tiny liquid crystal in the parent of polymer substance, these liquid crystal produce response to the voltage that the outside applied, under the kenel of scattering of light or photoabsorption, use polymer to disperse the liquid-crystal display of formula liquid crystal to use the liquid-crystal display of nematic liquid crystal different with other, it does not use Polarizer, sufficient brightness can be omitted grinding step, and technical process is simple.
But, conventional polymer disperses the poor contrast of formula liquid crystal, and literal shows difficulty, and when liquid crystal content was low, the characteristic of liquid crystal was poor, the characteristic degradation of indicating meter, and when liquid crystal and polymer mixed, liquid crystal must be more than 50% or 50%.Therefore, liquid crystal content is quite a lot of and can be aging immediately because of ultraviolet ray, and this is the fatal shortcoming of indicating meter, when using with the room light irradiation, is restricted in the use.
Conventional polymer disperses the formula liquid crystal to use nematic liquid crystal when the outside applies voltage, and liquid crystal can be arranged and printing opacity along with the direction of voltage, because the molecule of nematic liquid crystal can not arrange toward certain orientation on characteristic regularly, so can't effectively intercept light source.
For solving the problem of above-mentioned routine techniques, the present invention uses strong dielectricity and non-strong dielectricity liquid crystal to reduce the liquid crystal usage quantity, reduce the ratio of mixture of polymer substance simultaneously, response speed is fast, the optical stability height is a kind of liquid-crystal display polymer built-up type liquid crystal (PALC) that promotes contrast gradient.
For achieving the above object, the invention provides strong dielectricity liquid crystal and the non-strong dielectricity liquid crystal and the polymer substance blended polymer built-up type liquid crystal of a kind of spontaneous polarization that has permanent dipole, slightly looks (basic spontaneous polarization).
Strong dielectricity liquid crystal and non-strong dielectricity response speed of liquid crystal are fast, and molecular arrangement is stable, mix with polymer built-up type liquid crystal below 40% or 40% and 60% or 60% above polymer substance.
At this moment, in order not allow the crystallization deposition of strong dielectricity liquid crystal and non-strong dielectricity liquid crystal, must carefully mix with certain ratio.The weight percent that strong dielectricity liquid crystal and non-strong dielectricity liquid crystal account for whole polymer built-up type liquid crystal preferably 15%～30% to 5%～10%.
The present invention can use following two kinds strong dielectricity liquid crystal:
(R is C in the following formula
8～C
12Alkyl)
(R in the following formula
1Be C
7～C
10Alkyl)
Non-strong dielectricity liquid crystal can be selected for use from following three kinds:
(R in the following formula
1Be C
7～C
10Alkyl)
Polymer substance can be formed by the monomer polymerization of polyurethane-acrylate (urethane acrylate) oligomerisation multipolymers such as CN972 (Japanese SARTOMER corporate system), EB4827 (Japanese RADCURE corporate system), Aronix (Japanese East Asia synthetic chemistry society system) and acrylate such as EHA, HDDMA, TMPTA, DPETA or methacrylic ester.
The present invention can also add dyestuff in strong dielectricity liquid crystal and non-strong dielectricity liquid crystal.At this moment, with strong dielectricity liquid crystal below 40% or 40% and non-strong dielectricity liquid crystal ratio of mixture, a small amount of interpolation is dissolved in the liquid crystal.
Dyestuff can use D5, D35 (Britain BDH corporate system), L-dye (Switzerland Russell Co., Ltd system) or G209, G168, G165, G224, G232 (Japanese photopigment institute system).
When electric field is closed, use the indicating meter liquid crystal of polymer built-up type liquid crystal of the present invention and high molecular specific refractory power inconsistent, cause the light source scattering, present the state that turns white, when applying electric field, liquid crystal is consistent with high molecular specific refractory power, presents vitreous state.
When adding dyestuff, since the Guest-Host effect, the color of demonstration dyestuff during the light source scattering, and state shows transparency during the specific refractory power unanimity.
Polymer built-up type liquid crystal of the present invention sees through has the spontaneous polarization of slightly looking strong dielectricity liquid crystal and non-strong dielectricity liquid crystal quickening response speed, increases the blocking-up selectivity characteristic that light source sees through, and improves the contrast gradient when opening or closing.And see through high saturating passband and keep wide visual angle, promote whole optical characteristics.
For these reasons, polymer built-up type liquid crystal of the present invention is that usage quantity is few, also can regulate the course of light, even if reduce the ratio of mixture of liquid crystal, also can produce indicating meter, and not only manufacturing expense is low, can also control catabiosis.
Below describe the present invention in detail with specific embodiment.[embodiment 1]
Use 30% strong dielectricity liquid crystal
(R is C in the following formula
8～C
12Alkyl) and 10% non-strong dielectricity liquid crystal,
After heating mixes under the side's of grade property (isotropy) mesomorphic state, slowly cool off with normal temperature, allow crystallization be unlikely deposition.
With mixed liquid crystal and polyurethane-acrylate (urethane acrylate) and TMPTA mixing, can obtain the polymer built-up type liquid crystal of forming by the last 40% dielectricity liquid crystal, non-strong dielectricity liquid crystal and 60% polymer (being polymerized) by urethane acrylate and TMPTA.[embodiment 2]
Use the material identical with embodiment 1, with with a kind of method manufacturing, but the ratio of mixture of liquid crystal is reduced to 20% by 40%, the ratio of mixture of strong dielectricity liquid crystal and non-strong dielectricity liquid crystal is kept 3: 1 ratio, can obtain the polymer built-up type liquid crystal of being made up of the last 20% dielectricity liquid crystal, non-strong dielectricity liquid crystal and 80% polymer (being polymerized by urethane acrylate and TMPTA).[embodiment 3]
Use 30% strong dielectricity liquid crystal
(R in the following formula is C
8～C
12Alkyl) and 10% non-strong dielectricity liquid crystal,
After heating mixes under the side's of grade property mesomorphic state, slowly cool off with normal temperature, allow crystallization be unlikely deposition.
With mixed liquid crystal and urethane acrylate and EHA mixing, can obtain the polymer built-up type liquid crystal of forming by the last 40% dielectricity liquid crystal, non-strong dielectricity liquid crystal and 60% polymer (being polymerized) by urethane acrylate and EHA.[embodiment 4]
Use the material identical with embodiment 3, with with a kind of method manufacturing, but the ratio of mixture of liquid crystal is reduced to 20% by 40%, the ratio of mixture of strong dielectricity liquid crystal and non-strong dielectricity liquid crystal is kept 3: 1 ratio, can obtain the polymer built-up type liquid crystal of being made up of the last 20% dielectricity liquid crystal, non-strong dielectricity liquid crystal and 80% polymer (being polymerized by urethane acrylate and EHA).[embodiment 5]
Use 30% strong dielectricity liquid crystal
(R in the following formula is C
7～C
10Alkyl) and 10% non-strong dielectricity liquid crystal,
(the R in the following formula
1Be C
7～C
10Alkyl)
After heating mixes under the side's of grade property mesomorphic state, slowly cool off with normal temperature, allow crystallization be unlikely deposition.
With mixed liquid crystal and urethane acrylate and HDDMA mixing, can obtain the polymer combination of liquid crystals of forming by the last 40% dielectricity liquid crystal, non-strong dielectricity liquid crystal and 60% polymer (being polymerized) by urethaneacrylate and HDDMA.[embodiment 6]
Use the material identical with embodiment 5, with with a kind of method manufacturing, but the ratio of mixture of liquid crystal is reduced to 20% by 40%, the ratio of mixture of strong dielectricity liquid crystal and non-strong dielectricity liquid crystal is kept 3: 1 ratio, can obtain the polymer built-up type liquid crystal of being made up of the last 20% dielectricity liquid crystal, non-strong dielectricity liquid crystal and 80% polymer (being polymerized by urethane acrylate and HDDMA).[embodiment 7]
Use strong dielectricity liquid crystal and the non-strong dielectricity liquid crystal material of embodiment 1, after heating mixes under the side's of grade property mesomorphic state, slowly cool off, allow crystallization be unlikely deposition with normal temperature.D5 (Britain BDH corporate system) dyestuff is added in the liquid crystal on a small quantity and dissolves, allow the ratio of mixture of liquid crystal compound and dyestuff be 40%.
Liquid crystal and the urethane acrylate and the TMPTA mixing of mixing colouring agent will be contained, the polymer built-up type liquid crystal of forming by the last 40% dielectricity liquid crystal, non-strong dielectricity liquid crystal, dyestuff and 60% polymer (being polymerized) can be obtained by urethane acrylate and TMPTA.
Be dissolved in dyestuff in the liquid crystal when imposing voltage, the Guest-Host effect Show Color that can arrange according to liquid crystal.[embodiment 8]
Use strong dielectricity liquid crystal and the non-strong dielectricity liquid crystal material of embodiment 3, after heating mixes under the side's of grade property mesomorphic state, slowly cool off, allow crystallization be unlikely deposition with normal temperature.L-dye (Switzerland Russell Co., Ltd system) dyestuff is added in the liquid crystal on a small quantity and dissolves, allow the ratio of mixture of liquid crystal compound and dyestuff be 40%.
Liquid crystal and the urethane acrylate and the EHA mixing of mixing colouring agent will be contained, the polymer built-up type liquid crystal of forming by the last 40% dielectricity liquid crystal, non-strong dielectricity liquid crystal, dyestuff and 60% polymer (being polymerized) can be obtained by urethane acrylate and EHA.[embodiment 9]
Use strong dielectricity liquid crystal and the non-strong dielectricity liquid crystal material of embodiment 5, after the mixing of heating under the side's of grade property mesomorphic state, slowly cool off, allow crystallization be unlikely deposition with normal temperature.G209 (Japanese photopigment institute system) dyestuff is added in the liquid crystal on a small quantity and dissolves, allow the ratio of mixture of liquid crystal compound and dyestuff be 40%.
Liquid crystal and the urethane acrylate and the HDDMA mixing of mixing colouring agent will be contained, the polymer built-up type liquid crystal of forming by the last 40% dielectricity liquid crystal, non-strong dielectricity liquid crystal, dyestuff and 60% polymer (being polymerized) can be obtained by urethane acrylate and HDDMA.[comparative example]
In order to compare with polymer built-up type liquid crystal of the present invention, nematic liquid crystal with 60% and 40% polymer mix, and allow uviolizing, can obtain conventional polymer and disperse formula liquid crystal (PDLC).
Polymer built-up type liquid crystal of the present invention is injected by the formed a pair of substrate of transparency electrode, and the sealing back makes liquid crystal cell.
In 20 to 30 meters projection sources of distance liquid crystal cell, and impose the driving voltage test.Table 1 is listed with the measured light transmittance of 20V driving voltage, response speed, contrast gradient and visual angle value.
Table 1
| Project | Unit | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | |
| Response speed | Ton | ?Msec | ????39.8 | ????68.3 | ????40.8 | ????62.4 | ????39.0 |
| Toff | ????26.0 | ????22.3 | ????26.0 | ????23.2 | ????25.8 | ||
| Contrast gradient | ????100∶1 | ????90∶1 | ????100∶1 | ????95∶1 | ????100∶1 | ||
| Light transmittance | ??％ | ????89.00 | ????88.27 | ????88.82 | ????86.24 | ????89.00 | |
| Maximum visual angle | Degree | ????±50 | ????±50 | ????±50 | ????±45 | ????±50 | |
| Project | Unit | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | |
| Response speed | Ton | ?Msec | ????39.4 | ????44.2 | ????52.4 | ????50.2 | ????139.8 |
| Toff | ????26.0 | ????23.4 | ????24.7 | ????25.8 | ????125.9 | ||
| Contrast gradient | ????90∶1 | ????100∶1 | ????100∶1 | ????95∶1 | ????10∶1 | ||
| Light transmittance | ??％ | ????86.18 | ????89.00 | ????88.36 | ????87.47 | ????70.00 | |
| Maximum visual angle | Degree | ????±50 | ????±50 | ????±50 | ????±45 | ????±40 | |
As above show describedly, the light transmittance of polymer built-up type liquid crystal of the present invention is between 86% to 89%, and response speed is below the 100msec, and contrast gradient is 100: 1, maximum visual angle ± 50 degree, and effect is better than conventional liquid crystal.
Can learn that by above embodiment and comparative example liquid-crystal display of the present invention can effectively solve the problem of routine techniques with polymer built-up type liquid crystal.That is polymer built-up type liquid crystal of the present invention uses strong dielectricity liquid crystal and non-strong dielectricity liquid crystal with spontaneous polarization of slightly looking to accelerate response speed, increases the blocking-up selectivity characteristic that light source penetrates, and improves the contrast gradient when opening or closing.And see through high light transmittance and keep wide visual angle, increase whole optical characteristics.
For these reasons, polymer combination of liquid crystals of the present invention is that usage quantity is few, also can regulate the course of light, even if reduce the ratio of mixture of liquid crystal, also can produce indicating meter, and not only manufacturing expense is low, can also control catabiosis.Therefore, polymer built-up type liquid crystal of the present invention not only has the function of dimmer, can also show character.
Above illustrated embodiment only is used to illustrate the present invention, and is non-in order to the restriction scope of the invention.Modification that all are made on the basis of spirit of the present invention or variation all belong to protection scope of the present invention.
Claims (5)
1. a polymer built-up type liquid crystal that is used for liquid-crystal display comprises strong dielectricity liquid crystal and non-strong dielectricity liquid crystal below 40% or 40%, and 60% or 60% above polymer substance.
2. the polymer built-up type liquid crystal that is used for liquid-crystal display as claimed in claim 1, the ratio of mixture of this polymer substance is between 60% to 80%.
3. the polymer built-up type liquid crystal that is used for liquid-crystal display as claimed in claim 1 or 2, the ratio of mixture of this strong dielectricity liquid crystal is between 15% to 30%.
4. the polymer built-up type liquid crystal that is used for liquid-crystal display as claimed in claim 1, this polymer substance is formed by the monomer polymerization of polyurethane-acrylate oligomerisation multipolymer and acrylate or methacrylic ester.
5. the polymer built-up type liquid crystal that is used for liquid-crystal display as claimed in claim 1 is added with dyestuff in this strong dielectricity liquid crystal and the non-strong dielectricity liquid crystal, and total ratio of mixture is below 40% or 40%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00137432 CN1361228A (en) | 2000-12-29 | 2000-12-29 | High polymer liquid crystal for liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00137432 CN1361228A (en) | 2000-12-29 | 2000-12-29 | High polymer liquid crystal for liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1361228A true CN1361228A (en) | 2002-07-31 |
Family
ID=4597737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00137432 Pending CN1361228A (en) | 2000-12-29 | 2000-12-29 | High polymer liquid crystal for liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1361228A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101542373B (en) * | 2006-11-24 | 2011-07-27 | 大日本印刷株式会社 | Liquid crystal display element |
-
2000
- 2000-12-29 CN CN 00137432 patent/CN1361228A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101542373B (en) * | 2006-11-24 | 2011-07-27 | 大日本印刷株式会社 | Liquid crystal display element |
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