CN102127457A - Alignment layer material, alignment layer and preparation method thereof, and birefringent liquid crystal film and preparation method thereof - Google Patents
Alignment layer material, alignment layer and preparation method thereof, and birefringent liquid crystal film and preparation method thereof Download PDFInfo
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- CN102127457A CN102127457A CN2010106161719A CN201010616171A CN102127457A CN 102127457 A CN102127457 A CN 102127457A CN 2010106161719 A CN2010106161719 A CN 2010106161719A CN 201010616171 A CN201010616171 A CN 201010616171A CN 102127457 A CN102127457 A CN 102127457A
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Abstract
The invention provides an alignment layer material which is used for preparing an alignment layer. The alignment layer material comprises a polymer of which the molecular structural formula is disclosed in the specification. The invention also provides an alignment layer and a preparation method thereof, and a birefringent liquid crystal film and a preparation method thereof. Compared with the prior art, the film formation of the alignment layer, birefringent liquid crystal film and alignment layer material provided by the invention is not restricted to temperature; the alignment layer, birefringent liquid crystal film and alignment layer material are suitable for mass coating, and have high permeability; and the special groove structure and the polar force of molecular bonds can improve the alignment with the liquid crystals. Meanwhile, the preparation methods of the alignment layer and the birefringent liquid crystal film are simple, and the alignment film can be cured at low temperature, so the invention is beneficial to increasing yield and lowering cost, and is convenient for implementing mass production technique by liquid crystal film technology.
Description
Technical field
The present invention relates to the display panels field, relate in particular to alignment layer material, both alignment layers, birefringence liquid crystal film and manufacture method thereof.
Background technology
Along with the digital network development of science and technology, in each aspect in daily life, liquid-crystal display (Liquid Crystal Display, LCD) the panel industry is except originally with notebook computer (Notebook, NB), more use development with all strength towards the market that comprises directions such as liquid crystal screen display, Portable consumption-orientation video and audio product, mobile telephone and liquid crystal TV set as outside the core application.
Since the different market requirements, the also corresponding raising of requirement of present visual angle, contrast gradient, show uniformity etc. to display panels self.For addressing the above problem, industry constantly proposes new scheme to the manufactured materials and the manufacturing process of display panels.And in display panels, relevant to the improvement of the direct and above-mentioned problem of the research of LCD alignment control techniques, both alignment layers assessment technology, therefore, the production control technology of both alignment layers is extremely important.
Generally speaking, the Liquid Crystal Molecules Alignment mode mainly is divided into long axis of liquid crystal molecule and is parallel to both alignment layers, is called Homogeneous Alignment; Major axis is called Hetergeneous or Vertical Alignment perpendicular on the both alignment layers; But in the application of liquid crystal screen display, the inclination that liquid crystal molecule and alignment layer surface are a certain angle (is tilt angle, PretiltAngle), so just can reaches the effect of homogeneous orientation.This tilt angle depends primarily on the materialization reactive force of both alignment layers, as hydrogen bond, (Hydrogenbond), Fan Dewali (vanderWaals force), Dipole-dipoleforce and mechanical force effect, i.e. groove (Groove) or alignment layer surface kenel.
In display panels, liquid crystal molecule must be arranged towards a certain specific direction, just can reach display effect, arrange the LCD alignment technology that depends on and desire to make liquid crystal molecule to produce stable homogeneous, because the interface of liquid crystal layer and both alignment layers has very strong adhesive power, close the back liquid crystal at electric field and rely on this adhesive power and return to original arrangement.
The main mode of manufacturing both alignment layers in the LCD alignment technology comprises ionic fluid orientation, evaporation silicon oxide and friction matching technology etc.Wherein, mode such as ionic fluid orientation and evaporation silicon oxide all exists manufacturing process volume production difficulty, problem that cost is high.
Summary of the invention
The scheme that the present invention solves the problems of the technologies described above has provided a kind of both alignment layers, birefringence liquid crystal film and alignment layer material and manufacture method.
The invention provides a kind of alignment layer material, this alignment layer material is used to make both alignment layers, and alignment layer material comprises a kind of polymkeric substance, and polymkeric substance has following molecular structural formula:
According to a preferred embodiment of the invention, polymkeric substance is that multiple compound forms through polyreaction, wherein this multiple compound comprises: Hydroxyethyl acrylate, 3-isocyanic ester methylene-3,5,5-3-methyl cyclohexanol based isocyanate, bis-phenol base propane and 1.4-cyclohexanediol.
According to a preferred embodiment of the invention, Hydroxyethyl acrylate, 3-isocyanic ester methylene-3,5, the mol ratio of 5-3-methyl cyclohexanol based isocyanate, bis-phenol base propane and 1.4-cyclohexanediol is 2: 16: 12: 3.
According to a preferred embodiment of the invention, this alignment layer material also comprises photosensitizers, and the concentration of photosensitizers in alignment layer material is massfraction 0.1%-1%.
According to a preferred embodiment of the invention, this alignment layer material also comprises initiator.
According to a preferred embodiment of the invention, initiator is selected from 2-hydroxy-2-methyl-1-phenyl-acetone, 1-hydroxy-cyclohexyl phenyl ketone and 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio group) phenyl]-in the 1-acetone one or more.
The present invention also provides a kind of both alignment layers, and both alignment layers comprises a kind of alignment layer material, and this alignment layer material is used to make both alignment layers, and alignment layer material comprises a kind of polymkeric substance, and this polymkeric substance has following molecular structural formula:
The present invention also provides a kind of birefringence liquid crystal film, it comprises both alignment layers and liquid crystal monomer, both alignment layers is oppositely arranged, liquid crystal monomer is arranged between the both alignment layers, both alignment layers comprises a kind of alignment layer material, this alignment layer material is used to make both alignment layers, and alignment layer material comprises a kind of polymkeric substance, and this polymkeric substance has following molecular structural formula:
The present invention also provides a kind of manufacture method of both alignment layers, and the manufacture method of both alignment layers may further comprise the steps: a. provides a base material and alignment layer material, and this alignment layer material comprises a kind of polymkeric substance, and polymkeric substance has following molecular structural formula:
B. alignment layer material is applied to a surface of base material; C. solidify the alignment layer material that is coated on substrate surface; D. adopt alignment technique that the alignment layer material after solidifying is carried out orientation, form both alignment layers.
According to a preferred embodiment of the invention, adopt UV-irradiation to solidify the alignment layer material that is coated on substrate surface among the step c.
According to a preferred embodiment of the invention, the wavelength energy of the UV-light that adopts among the step c is 100*10
6J/cm
2-1000*10
6J/cm
2
According to a preferred embodiment of the invention, the alignment technique in the steps d is the friction matching technology.
According to a preferred embodiment of the invention, described base material is the PET material.
The present invention also provides a kind of manufacture method of birefringence liquid crystal film, and the manufacture method of this birefringence liquid crystal film may further comprise the steps: a. provides both alignment layers, and this both alignment layers comprises a kind of polymkeric substance, and polymkeric substance has following molecular structural formula:
B. coating of liquid crystalline monomer between two layers of both alignment layers; And c. adopts UV-irradiation to solidify liquid crystal monomer.
Compared to prior art, both alignment layers of the present invention, birefringence liquid crystal film and alignment layer material film forming thereof are not subjected to the restriction of temperature, be suitable for a large amount of coatings, and have high-permeability, groove structure that it is special and molecular linkage polar forces can increase its orientation to liquid crystal.The manufacturing approach craft of this both alignment layers of the present invention, birefringence liquid crystal film is simple simultaneously, is beneficial to volume production and cost is lower, and is convenient to the liquid crystal film technology and realizes manufacture craft in enormous quantities.
Description of drawings
Fig. 1 is the macro molecules structural representation of the polymkeric substance in the alignment layer material of one embodiment of the invention;
Fig. 2 is the manufacture method schema of the both alignment layers of one embodiment of the invention;
Fig. 3 is an apparatus for coating synoptic diagram in the both alignment layers manufacture method shown in Figure 2;
Fig. 4 is the synoptic diagram of HEA crosslinking method in the polymkeric substance of both alignment layers shown in Figure 1;
Fig. 5 is a friction matching process schematic representation in the both alignment layers manufacture method shown in Figure 2;
Fig. 6 is the manufacture method schema of the birefringence liquid crystal film of one embodiment of the invention;
Fig. 7 is a birefringence liquid crystal side surface of thin film synoptic diagram in the manufacture method of birefringence liquid crystal film shown in Figure 6; And
Fig. 8 is the detection method synoptic diagram of the TN box opticity of one embodiment of the invention.
Embodiment
The present invention is described in detail below in conjunction with accompanying drawing.
The invention provides a kind of alignment layer material, this alignment layer material is used to make both alignment layers, this alignment layer material comprises a kind of polymkeric substance, this polymkeric substance is that multiple compound forms through polyreaction, wherein this multiple compound comprises: Hydroxyethyl acrylate (HEA), 3-isocyanic ester methylene-3,5,5-3-methyl cyclohexanol based isocyanate (IPDI), bis-phenol base propane (BPA) and 1.4-cyclohexanediol (Cyclohexanediol).In a preferred embodiment of the present invention, the Hydroxyethyl acrylate that adopts in this polyreaction, 3-isocyanic ester methylene-3,5, the mol ratio of 5-3-methyl cyclohexanol based isocyanate, bis-phenol base propane and 1.4-cyclohexanediol is 2: 16: 12: 3.
This polymkeric substance has following molecular structural formula, the about 6000-8000 of its molecular-weight average:
This polymkeric substance has following molecular chain:
HEA-IPDI-BPA-IPDI-Cyclohexanediol-IPDI-BPA-IPDI-BPA-IPDI-BPA-IPDI-BPA-IPDI-BPA-IPDI-BPA-IPDI-BPA-IPDI-BPA-IPDI-BPA-IPDI-BPA-IPDI-BPA-IPDI-Cyclohexanediol-IPDI-BPA-HEA。
Fig. 1 shows the macro molecules structural representation of this polymkeric substance.
This alignment layer material can further include additive, and this additive comprises dyestuff, flow agent, softening agent, photosensitizers, initiator and defrother etc.Wherein, the concentration of photosensitizers in alignment layer material can reach massfraction 0.1%-1%, and initiator then can be selected from 2-hydroxy-2-methyl-1-phenyl-acetone, 1-hydroxy-cyclohexyl phenyl ketone and 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio group) phenyl]-in the 1-acetone one or more.
The present invention also provides a kind of both alignment layers, and this both alignment layers comprises alignment layer material of the present invention.
The present invention also provides a kind of birefringence liquid crystal film, and this birefringence liquid crystal film comprises both alignment layers and liquid crystal monomer, and both alignment layers comprises alignment layer material of the present invention.
The present invention also provides a kind of manufacture method of both alignment layers, and as shown in Figure 2, the manufacture method of this both alignment layers may further comprise the steps:
Step S11 provides a base material and alignment layer material.Particularly, provide a base material, this base material can be the rectangle glass plate in order to the manufacturing display panels of a surfacing, and it comprises a coating surface.The base material of alignment films can be the PET material.
Alignment layer material is provided, and this alignment layer material is alignment layer material as described in the present invention, and comprises a kind of polymkeric substance as described in the present invention, and this polymkeric substance has following molecular structural formula:
Step S12 is applied to alignment layer material on one surface of base material.
Particularly, adopt apparatus for coating as shown in Figure 3, adopt roller printing coating process to be coated with the coating surface of this alignment layer material in this base material, coating thickness≤0.1 micron makes this alignment layer material be homogeneous layered setting.Certainly in the present embodiment, the coating of this alignment layer material can also be passed through technologies realizations such as rotary coating, rolling coating, dip coated, spraying coating or intaglio plate coating.
Step S13 solidifies the alignment layer material that is coated on substrate surface.
In the present embodiment, can adopt UV-irradiation solidified mode that the alignment layer material on the surface that is coated on base material is cured, also can take other suitable curing modes certainly in another embodiment.Particularly, provide a ultraviolet light source system, this ultraviolet light source system can be a high voltage mercury lamp, and it is in order to send ultraviolet light beam.The wavelength energy of adjusting the ultraviolet light beam of this ultraviolet light source system generation is 100*10
6J/cm
2-1000*10
6J/cm
2, the ultraviolet light beam uniform irradiation to the alignment layer material that is positioned at this substrate surface, is made that this alignment layer material is mutually crosslinked and solidifies.For example, can place the 2kw ultraviolet lamp at distance alignment layer material 20cm place, adopt and solidify energy 1000*10
6J/cm
2Solidify in tens seconds to 5 minutes, to finish the curing flow process.
Because the base material non-refractory of PET material can be out of shape under the pyritous situation, and ultra-violet curing alignment layer material of the present invention can just be finished the curing to alignment films at low temperatures, and is particularly important to the improvement of alignment films processing procedure.
Adopt shorten greatly the set time of ultra-violet curing alignment films, than existing P I alignment films should be by processes such as PI prebake conditions and PI post bakes, there are intensification, constant temperature and 3 processes of cooling to want 1-2 hour at least, the manufacture method of both alignment layers of the present invention has been optimized processing procedure greatly, save the time of whole processing procedure, also saved cost simultaneously.
In this ultraviolet light beam irradiation process, polymerization can take place in the HEA in this alignment layer material under UV-light, makes this alignment layer material under UV-light crosslinking reaction take place.As shown in Figure 4, HEA mainly contains two kinds of crosslinking methods, the parallel way shown in the series system shown in Fig. 4 a and Fig. 4 b.
Step S14 adopts alignment technique that the alignment layer material after solidifying is carried out orientation, forms both alignment layers.
Utilize flannelette roller 1 to carry out forward mechanical type friction of contact, specifically as shown in Figure 5 on the surface of the material layer of this alignment layer material formation.
The present invention also provides a kind of manufacture method of birefringence liquid crystal film, and shown in Fig. 6,7, the manufacture method of birefringence liquid crystal film may further comprise the steps:
Step S21 provides both alignment layers 2,3, and this both alignment layers 2,3 comprises a kind of polymkeric substance, and this polymkeric substance has following molecular structural formula:
The manufacture method of both alignment layers 2,3 repeats no more with step S11 to S14 herein in this step.As shown in Figure 7, form two relative both alignment layers of this birefringence liquid crystal film respectively.
Step S22, coating curable liquid crystal monomer 4, for example RM257 of Merck Ltd between both alignment layers.
On both alignment layers, fill polymerizable liquid-crvstalline monomer 4, need at liquid crystal monomer 4 to make liquid crystal carry out orientation under the temperature of orientation according to the groove of friction.Because 4 distortions have certain reactive force to liquid crystal monomer for the special construction of polymkeric substance and molecular linkage polar forces in the alignment layer material, therefore, simple friction can make liquid crystal monomer 4 carry out orientation according to the groove of friction.The action of the macromolecule surface of the material layer that this both alignment layers of wherein rubbing forms the energy of confession high polymer main chain is forward arranged because of extension, form a plurality of microstructures, reach the effect that makes liquid crystal monomer 4 orientations arrangement.
Step S23 adopts UV-irradiation curable liquid crystal monomer 4.
After orientation finishes, utilize UV-light to solidify liquid crystal monomer 4 once more, thereby obtain the birefringence liquid crystal film.This birefringence liquid crystal film can penetrate the light of liquid crystal No specific refractory power (ordinary light specific refractory power) under the polarized light of its frictional direction, the light that can penetrate liquid crystal Ne specific refractory power (very optical index) under the polarized light of 90 ° of its frictional directions comes, and its orientation time, temperature and transmitance are all good soon than the birefringent film that uses polyimide alignment to make.
Its birefringence liquid crystal film is usually used in the application of 2D/3D switchable type three-dimensional display, as authorizing publication number is: the birefringent lens described in the CN 100360987C.
Another embodiment of the present invention also provides the method for utilizing alignment layer material of the present invention to make the TN box, and this method may further comprise the steps: the vertical or anti-parallel direction of the glass of friction coating alignment layer material → be coated with fabric width frame glue → sprinklings spacer (Spacer) → according to frictional direction is fitted and be orientated glass → perfusion Merck model is E80 liquid crystal → sealing filling crystalline substance mouth.Finish and detect its opticity according to following method after the TN box is made.As shown in Figure 8,5 is laser beam among Fig. 8, and 6 is first polaroid, and 7 is the TN box, and 8 is second polaroid.Get any 4 positions, angle of rotation is 90 ± 5 degree, and the polarization state of TN box laser beam under parallel polarized light changes as shown in table one, writes down angle of rotation, obtains the mean value (as shown in Table 2) of 4 points.
Table one:
Table two:
| |
|
|
|
Mean value | The | |
| Test | ||||||
| 1 | 92° | 92° | 95° | 93° | 93° | |
| Test | ||||||
| 2 | 95° | 95° | 94° | 92° | 94° | Qualified |
The opticity detected result satisfies the standard of TN box, illustrates that liquid crystal is well arranged in both alignment layers of the present invention.
Compared to prior art, both alignment layers of the present invention, birefringence liquid crystal film and alignment layer material film forming thereof are not subjected to the restriction of temperature, be suitable for a large amount of coatings, and have high-permeability, groove structure that it is special and molecular linkage polar forces can increase its orientation to liquid crystal.The manufacturing approach craft of this both alignment layers of the present invention, birefringence liquid crystal film is simple simultaneously, can be implemented under the low temperature alignment film is cured, and helps the reduction of volume production and cost, and is convenient to the liquid crystal film technology and realizes manufacture craft in enormous quantities.
In the above-described embodiments, only the present invention has been carried out exemplary description, but those skilled in the art can carry out various modifications to the present invention after reading present patent application under the situation that does not break away from the spirit and scope of the present invention.
Claims (14)
1. alignment layer material, described alignment layer material is used to make both alignment layers, it is characterized in that, and described alignment layer material comprises a kind of polymkeric substance, and described polymkeric substance has following molecular structural formula:
2. alignment layer material according to claim 1, it is characterized in that, described polymkeric substance is that multiple compound forms through polyreaction, wherein said multiple compound comprises: Hydroxyethyl acrylate, 3-isocyanic ester methylene-3,5,5-3-methyl cyclohexanol based isocyanate, bis-phenol base propane and 1.4-cyclohexanediol.
3. alignment layer material according to claim 2, it is characterized in that, described Hydroxyethyl acrylate, described 3-isocyanic ester methylene-3,5, the mol ratio of 5-3-methyl cyclohexanol based isocyanate, described bis-phenol base propane and described 1.4-cyclohexanediol is 2: 16: 12: 3.
4. alignment layer material according to claim 1 is characterized in that described alignment layer material also comprises photosensitizers, and the concentration of described photosensitizers in described alignment layer material is massfraction 0.1%-1%.
5. alignment layer material according to claim 1 is characterized in that described alignment layer material also comprises initiator.
6. alignment layer material according to claim 5, it is characterized in that described initiator is selected from 2-hydroxy-2-methyl-1-phenyl-acetone, 1-hydroxy-cyclohexyl phenyl ketone and 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio group) phenyl]-in the 1-acetone one or more.
7. a both alignment layers is characterized in that, described both alignment layers comprises any described alignment layer material of claim 1 to 6.
8. birefringence liquid crystal film, it comprises its both alignment layers and liquid crystal monomer, described birefringence liquid crystal film is to use its described alignment layer material orientation to make, and it is characterized in that described both alignment layers comprises as any described alignment layer material of claim 1 to 6.
9. the manufacture method of a both alignment layers is characterized in that, the manufacture method of described both alignment layers may further comprise the steps:
A., one base material and alignment layer material are provided, and described alignment layer material comprises a kind of polymkeric substance, and described polymkeric substance has following molecular structural formula:
B. described alignment layer material is applied to a surface of described base material;
C. solidify the described alignment layer material that is coated on substrate surface; And
D. adopt alignment technique that the described alignment layer material after solidifying is carried out orientation, form both alignment layers.
10. the manufacture method of both alignment layers according to claim 9 is characterized in that, adopts UV-irradiation to solidify the described alignment layer material that is coated on substrate surface among the described step c.
11. the manufacture method of both alignment layers according to claim 10 is characterized in that, the wavelength energy of the UV-light that adopts among the described step c is 100*10
6J/cm
2-1000*10
6J/cm
2
12. the manufacture method of both alignment layers according to claim 9 is characterized in that, the alignment technique described in the described steps d is the friction matching technology.
13. the manufacture method of both alignment layers according to claim 9 is characterized in that, described base material is the PET material.
14. the manufacture method of a birefringence liquid crystal film is characterized in that, the manufacture method of described birefringence liquid crystal film may further comprise the steps:
A., both alignment layers is provided, and described both alignment layers comprises a kind of polymkeric substance, and described polymkeric substance has following molecular structural formula:
B. friction matching layer, coating of liquid crystalline monomer between described both alignment layers;
C. adopt UV-irradiation to solidify described liquid crystal monomer.
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| CN2010106161719A CN102127457A (en) | 2010-12-30 | 2010-12-30 | Alignment layer material, alignment layer and preparation method thereof, and birefringent liquid crystal film and preparation method thereof |
| TW100110609A TWI453232B (en) | 2010-12-30 | 2011-03-28 | Alignment layer material, alignment layer, birefringent liquid crystal film and manufacturing method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102819145A (en) * | 2012-08-22 | 2012-12-12 | 深圳市华星光电技术有限公司 | Manufacturing method of liquid crystal panel |
| CN105549260A (en) * | 2016-03-08 | 2016-05-04 | 京东方科技集团股份有限公司 | Quantum rod structure and manufacturing method thereof |
| JP2020166288A (en) * | 2017-10-05 | 2020-10-08 | 住友化学株式会社 | Method for manufacturing optical member and manufacturing device |
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| JPH0743726A (en) * | 1993-05-28 | 1995-02-14 | Hoechst Japan Ltd | Liquid crystal display element |
| US6646060B1 (en) * | 1999-05-10 | 2003-11-11 | Teijin Limited | Resin composition containing crystalline polyimide |
| CN1794016A (en) * | 2004-12-22 | 2006-06-28 | 日东电工株式会社 | Hard-coated antiglare film and method of manufacturing the same |
| CN101268168A (en) * | 2005-09-20 | 2008-09-17 | 罗利克有限公司 | Functionalized photoreactive compounds |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009235296A (en) * | 2008-03-28 | 2009-10-15 | Asahi Kasei E-Materials Corp | Low polarity prepolymer and photosensitive resin composition containing it |
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2010
- 2010-12-30 CN CN2010106161719A patent/CN102127457A/en active Pending
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- 2011-03-28 TW TW100110609A patent/TWI453232B/en active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0743726A (en) * | 1993-05-28 | 1995-02-14 | Hoechst Japan Ltd | Liquid crystal display element |
| US6646060B1 (en) * | 1999-05-10 | 2003-11-11 | Teijin Limited | Resin composition containing crystalline polyimide |
| CN1794016A (en) * | 2004-12-22 | 2006-06-28 | 日东电工株式会社 | Hard-coated antiglare film and method of manufacturing the same |
| CN101268168A (en) * | 2005-09-20 | 2008-09-17 | 罗利克有限公司 | Functionalized photoreactive compounds |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102819145A (en) * | 2012-08-22 | 2012-12-12 | 深圳市华星光电技术有限公司 | Manufacturing method of liquid crystal panel |
| WO2014029116A1 (en) * | 2012-08-22 | 2014-02-27 | 深圳市华星光电技术有限公司 | Manufacturing method for liquid crystal panel |
| CN105549260A (en) * | 2016-03-08 | 2016-05-04 | 京东方科技集团股份有限公司 | Quantum rod structure and manufacturing method thereof |
| JP2020166288A (en) * | 2017-10-05 | 2020-10-08 | 住友化学株式会社 | Method for manufacturing optical member and manufacturing device |
| JP7158438B2 (en) | 2017-10-05 | 2022-10-21 | 住友化学株式会社 | OPTICAL MEMBER MANUFACTURING METHOD AND MANUFACTURING APPARATUS |
Also Published As
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|---|---|
| TW201226439A (en) | 2012-07-01 |
| TWI453232B (en) | 2014-09-21 |
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