WO2012064124A2 - 입체영상표시장치용 광학필터 및 이를 포함하는 입체영상표시장치 - Google Patents
입체영상표시장치용 광학필터 및 이를 포함하는 입체영상표시장치 Download PDFInfo
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- WO2012064124A2 WO2012064124A2 PCT/KR2011/008558 KR2011008558W WO2012064124A2 WO 2012064124 A2 WO2012064124 A2 WO 2012064124A2 KR 2011008558 W KR2011008558 W KR 2011008558W WO 2012064124 A2 WO2012064124 A2 WO 2012064124A2
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- optical filter
- alignment layer
- liquid crystal
- alignment
- display device
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/30—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving parallax barriers
- G02B30/31—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving parallax barriers involving active parallax barriers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/22—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type
- G02B30/25—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type using polarisation techniques
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/201—Filters in the form of arrays
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13363—Birefringent elements, e.g. for optical compensation
Definitions
- Optical filter for stereoscopic image display device and stereoscopic image display device including same
- the present invention relates to an optical filter for a stereoscopic image display device and a stereoscopic image display device including the same. More specifically, the pattern line width and the thickness of the liquid crystal layer can be easily adjusted, and the stereoscopic image display has excellent optical characteristics because there is no liquid crystal layer.
- the 3D image display device is a device that implements a 3D image similar to an image that a person actually sees and feels by inputting different images to the left eye and the right eye, respectively.
- the cause of the three-dimensional three-dimensional feeling of the human being is because the right eye and the left eye recognize objects with parallax.
- the human eyes are spaced apart by about 65 mm apart, the images are viewed in slightly different directions, and the stereoscopic sense is recognized by the binocular parallax generated at this time. Therefore, the stereoscopic image may be implemented by inputting parallax images to both eyes of the observer.
- the conventional stereoscopic image display apparatus can be divided into a method of using glasses (glasses method) and a method of not using glasses (glasses method), among which a stereoscopic image display device of glasses type is different from the display device.
- the left eye image and the right eye image having polarization characteristics are emitted, and a polarizing plate having a different transmission axis is attached to the glasses so that only the left eye image is projected on the left eye lens, and the right eye image is projected only on the left eye lens. It's the way you feel.
- This glasses method has the disadvantage of having to wear glasses, but has a relatively low viewing angle constraint and has the advantage of easy manufacturing.
- the three-dimensional image display apparatus of the spectacle type generally includes a display panel for generating left eye image light and right eye image light, and attached to the display panel to the left eye image light and the right eye image light. It consists of a polarization separator which gives different polarization states.
- the polarization separating unit is manufactured by patterning the polarizing plate itself or by attaching a phase difference plate (optical filter) patterned to the left and right eyes for the polarizing plate.
- the method of patterning the polarizing plate itself has a problem that the manufacturing process is complicated and the production cost is high because a chemical etching process is required. Recently, a method of attaching a patterned retardation plate (optical filter) to the polarizing plate has been widely used. .
- a method of patterning a retardation plate a method of forming a retardation layer on a substrate and then partially removing the retardation layer through laser etching, or selectively printing an alignment layer and a liquid crystal layer on the substrate using a printing method, etc. Is being used.
- laser etching there is a problem in that the phase difference layer damage or deformation due to heat is easy to be known and the defect rate is high.
- the optical filter can be formed by a relatively simple process, but the contact printing method Because of this, surface contamination is liable to occur during printing, and there is a problem in that it is not suitable for small quantity production of many kinds because a new printing plate must be used for line width adjustment.
- the pattern of the optical filter should have the same line width as the pixels of the display device. In the case of the optical filter manufactured by a conventional method, the pixels of the display device and the pattern of the optical filter are formed to exactly match. Difficult to do
- problems such as the liquid crystal layer stacked on the alignment layer flow down the side of the alignment layer to reduce the thickness of the liquid crystal layer, and the adjacent liquid crystal layers are mixed with each other, causing the liquid crystal layer not to contact the alignment layer, resulting in an unaligned portion. This occurs, and there is a limit in implementing high quality stereoscopic images.
- the present invention is to solve the above problems, it is easy to adjust the pattern line width and the thickness of the liquid crystal layer, the manufacturing process is simple, the three-dimensional image display device optical for separating the left eye image and the right eye image excellent optical characteristics A filter and a stereoscopic image display device including the same are provided.
- the present invention includes a substrate, an alignment layer formed in a predetermined pattern on the substrate and having a partition portion formed at an edge thereof, and a liquid crystal layer formed on the alignment layer, wherein the partition portion is 2 to 10 times the thickness of the center portion of the alignment layer.
- An optical filter for a stereoscopic image display device having a height of and separating a left eye image and a right eye image is provided.
- the partition wall of the alignment film has a height of 3 to 7 times the thickness of the center portion of the alignment film, and most preferably has a height of 5 to 6 times.
- the central thickness of the alignment film is preferably 20 to 500nm.
- the alignment layer is 1 to 5% by weight of a norbornene monomer substituted with fluorine or cinnamate group; 1 to 6% by weight of the acrylic monomer; 0.1 to 2 wt% photoinitiator; It may be made of a composition for forming an alignment film containing the remaining solvent.
- the composition for forming the alignment film has a boiling point of 13 CTC to 180 ° C and a viscosity of 4 to 20 cp.
- composition for forming the alignment layer is preferably having a drying rate of 1 to 40% by weight, the weight percent reduced after drying 3 minutes when dried at 50 to 150 ° C, it has a drying rate of 2 to 20% by weight More preferred, most preferably having a drying rate of 4 to 10% by weight.
- the present invention provides a stereoscopic image display device including the optical filter for a stereoscopic image display device as described above.
- the present invention (a) by printing the alignment film composition on a substrate and dried to form an alignment film formed in a predetermined pattern and the partition portion is formed at the edge step; And (b) forming a liquid crystal layer on the alignment layer to provide an optical filter manufacturing method for a stereoscopic image display device that separates a left eye image and a right eye image.
- the drying is preferably made for 1 minute to 5 minutes at a temperature of 5CTC to 150 ° C.
- the partition wall is formed at the edge of the alignment layer, and the liquid crystal layer does not flow to the side of the alignment layer, the pattern line width is increased or the liquid crystal layer is not overlapped so that unaligned portions do not occur. Can be implemented.
- a desired phase difference value can be sufficiently realized.
- the optical filter for a stereoscopic image display device of the present invention uses the inkjet method, which is a non-contact printing method, surface contamination does not occur, and line width control is free.
- 1 is a view showing the shape of the alignment layer and the liquid crystal layer formed in a conventional manner.
- 2 is a view showing an embodiment of the form of the alignment layer and the liquid crystal layer of the present invention.
- 3 is a view showing an embodiment of an optical filter for a stereoscopic image display device of the present invention.
- FIG. 4 is a view showing another embodiment of an optical filter for a stereoscopic image display device of the present invention.
- FIG. 5 is a view showing another embodiment of an optical filter for a stereoscopic image display device of the present invention.
- Example 6 is a view showing the shape of the alignment layer of Example 1 of the present invention.
- FIG. 7 is a view showing the shapes of the alignment layer and the liquid crystal layer of Example 1 of the present invention.
- FIG. 8 is a view showing the shape of the alignment layer of Comparative Example 1 of the present invention.
- 9 is a view showing the shape of the alignment layer and the liquid crystal layer of Comparative Example 1 of the present invention.
- 10 is a view showing the shape of the alignment film of Comparative Example 2 of the present invention.
- FIG. 11 is a view showing the shapes of the alignment layer and the liquid crystal layer of Comparative Example 2 of the present invention.
- FIG. 12 and 13 are views showing the shape of the alignment layer of Comparative Example 3 of the present invention.
- an optical filter for a stereoscopic image display device that separates a left eye image and a right eye image as an aspect of the present invention.
- an optical filter for a stereoscopic image display device includes a substrate 110, an alignment layer 120, and a liquid crystal layer 130.
- the said base material 110 should just be a transparent base material excellent in light transmittance, and is not specifically limited.
- the alignment layer 120 is formed in a predetermined pattern on the substrate 110, and the partition 126 is formed at an edge thereof.
- the alignment layer used in the conventional optical filter is formed as shown in Figure 1, in this case, if the liquid crystal layer 30 is formed on the alignment layer 20, the liquid crystal layer is placed next to the alignment layer As it is lowered, it covers the alignment layer.
- the thickness of the liquid crystal layer becomes thin, and thus, the desired phase difference value is not sufficiently realized, and the line width of the pattern is increased, so that the liquid crystal layer is mixed with the neighboring pattern so that the alignment is not performed properly.
- the performance is degraded and the quality of the stereoscopic images is degraded.
- the present inventors have found that by forming a barrier rib at the edge of the alignment layer, the present inventors can solve the above problems by preventing the liquid crystal layer from flowing down to the side of the alignment layer.
- the partition wall portion 126 of the alignment layer 120 is formed so that its height is 2 to 10 times, preferably 3 to 7 times, and most preferably 5 to 6 times the thickness of the center portion 128 of the alignment layer 120. desirable. If the height of the partition portion 126 is less than twice the thickness of the center portion 128 of the alignment layer 120, the height of the partition portion is too low relative to the center portion, so that liquid crystals having a thick thickness are not raised thereon, and the height of the partition portion 126 is higher. If the thickness exceeds 10 times the thickness of the center portion 128 of the alignment layer 120, the partition wall portion is so high that the width corresponding to the partition wall portion increases, thereby increasing the portion where the liquid crystal does not rise, resulting in deterioration of optical characteristics.
- the alignment film 120 preferably has a central thickness of 20 to 500 nm of the alignment film. This is because if the thickness of the center portion of the alignment layer is too thin, the alignment may not be performed. If the thickness of the center portion of the alignment layer is too thick, not only the alignment force may be lowered, but also waste of unnecessary materials.
- the thickness of the center portion of the alignment layer is 30 to 300nm, it is more preferable because it has an advantageous effect in terms of implementing the alignment characteristics of the liquid crystal, and in the case of 50 to 200nm, the alignment characteristics of the liquid crystal and the margin of the inkjet process It is most preferable because it is effective in easily implementing a linear pattern by optimizing.
- the optimization of the inkjet process margin may be due to the shape formed due to the difference in thickness between the alignment layer partition wall portion 126 and the alignment layer center portion 126. It means that the positional accuracy of the ink dropped by this is optimized.
- the height of the partition wall portion 126 is 40 to 5000 nm, more preferably 60 to 3000 nm, and most preferably 100 to 2000 nm, with respect to the thickness of the central portion of the alignment film.
- the alignment layer is a norbornene monomer; Acrylate monomers; Photoinitiator; And it is preferable that it consists of a composition for orientation film formation containing a remainder solvent.
- the norbornene monomer is used as a photo-alignment material, it is preferably substituted with a fluorine or cinnamate group. This is because the bloso or cinnamate group included in norbornene gives polarity to the photo-alignment polymer material to assist the alignment of the liquid crystal.
- the content is preferably 1 to 5% by weight, more preferably 2 to 4% by weight. This is because when the norbornene monomer is less than 1% by weight, a problem in that the alignment of the liquid crystal is not properly generated, and when it is more than 5% by weight, a problem of insufficient adhesion to the substrate occurs.
- the acrylate monomer is used as a crosslinking agent, the content is preferably 1 to 6% by weight, more preferably 2 to 4% by weight. This is because when the acrylate monomer is less than 1% by weight, there is a problem that the film is not cured, and when the acrylate monomer is greater than 6% by weight, a problem of deteriorating the performance of orienting the liquid crystal occurs.
- the photoinitiator Irgacure 365 or Irgacure 907 may be used, the content is preferably 0.1 to 2% by weight.
- the solvent is not particularly limited as long as the boiling point of the alignment film composition is 130 to 18 C C.
- aromatic solvents such as toluene and xylene, cyclopentanone, cyclonucleanone, and the like may be used alone or in combination. Can be.
- the content of the solvent should be included so that the total content of the alignment film composition is 100% by weight, specifically, it is preferable that the content is 87% by weight to 97.9% by weight.
- an additive such as a thickener, a crosslinking agent, a photoinitiator, a surfactant, or the like may be further added to the composition for forming an alignment film within a range that does not impair physical properties.
- the boiling point is preferably as low as about 13C C to 18CTC, more preferably 150 ° C to 180 ° C.
- the drying rate of the edge of the alignment layer during drying after printing is faster than the drying rate of the center portion, so that the solids are driven to the edges and the thickness of the edges becomes relatively thick, thereby forming partition walls at the edges.
- the height and thickness of the barrier rib formation is affected by the drying rate.
- the boiling point is higher than 18CTC, the barrier rib formation is hardly achieved due to the low drying rate.
- the boiling point of the composition for forming the alignment film is low.
- the drying speed is too high, and in particular, drying occurs in the inkjet nozzle, so that it is difficult to stably perform the inkjet process.
- the composition for forming the alignment film is not limited thereto, but the viscosity thereof is preferably about 4 to 20 cps, more preferably about 8 to 15 cps.
- the viscosity of the composition for forming an alignment film is less than 4 cps, drops are unstable during inkjet printing, resulting in satellite, poor straightness, difficult pattern formation, and viscosities exceeding 20 cps. This is because problems such as clogging of the printing nozzle may occur.
- the viscosity of the alignment film composition is in the range of 8 to 15cp, it is preferable because there is an advantage in that it is possible to continuously maintain a stable jetting conditions in the process of performing the inkjet process.
- the composition for forming the alignment layer preferably has a drying rate of 1 to 40% by weight when the weight percent reduced after drying for 3 minutes when dried at 50 to 15CTC.
- Drying of the composition for forming an alignment film is based on the premise that 10 g of the alignment film composition is placed in a glass plate having a diameter of 90 mm at a depth of about 4 mm, placed on a hot plate installed in a laboratory exhaust hood, and dried.
- the drying rate is affected by the boiling point and the drying temperature of the composition for forming the alignment film, it is preferable to control the boiling point, drying temperature and the like of the composition for forming the alignment film having a drying rate in the above-described range.
- the composition for forming an alignment layer when drying at 50 to 15 CTC, more preferably has a drying rate of 2 to 20% by weight, which is reduced by weight after 3 minutes drying, drying of 4 to 10% by weight It is most desirable to have a speed. This is because the alignment film edge thickness is suitable to have 3 to 7 times and 5 to 6 times the thickness of the center portion of the alignment film when the weight% reduced when drying at the temperature is within the above range.
- the alignment layer may be formed in a predetermined pattern, for example, a stripe pattern, a checkerboard pattern, or the like.
- the alignment layer pattern may be formed to be formed in the pixel portion of the display panel.
- the line width of the alignment layer is preferably formed to be the same as the pixel width of the display panel in order to increase the consistency with the display panel.
- the alignment layer patterned as described above may be formed through an inkjet printing method. Since the inkjet printing method is a non-contact printing method, there is little surface contamination at the time of printing, and various line widths can be realized by changing the position of the inkjet nozzle, which is suitable for producing small quantities of various types. In addition, since the alignment film can be formed only at a desired position, there is an advantage of less waste of material and a low production cost. Inkjet printing method The alignment film forming method is, for example, by laminating a composition for forming an alignment film in an inkjet printer, and then using the same to print an alignment film for a left eye image or a right eye image on a substrate at regular intervals, and then drying and then performing an alignment treatment method. Can be.
- the composition for forming the alignment film may be secondarily printed in a region where the alignment film is not formed, dried, and then subjected to alignment treatment.
- the alignment treatment may be performed by rubbing alignment or photo alignment according to the type of the alignment layer forming composition.
- the alignment treatment between the alignment layer formed primarily and the alignment layer formed secondary may be different from each other. It is preferable to carry out to have an orientation direction perpendicular to each other. This is because the crosstalk between the left eye image and the right eye image can be minimized because the polarization directions realized by the alignment of the liquid crystals are exactly perpendicular to each other.
- the drying is preferably made of low temperature drying of 50 to 15CTC, more preferably so to locrc. If the drying temperature is less than 50 ° C. drying is not performed properly, if it exceeds 15 CTC, the base film may be damaged.
- the liquid crystal layer 130 is formed thereon.
- the liquid crystal layer 130 is used to generate a phase difference, and the phase difference value depends on the thickness of the liquid crystal layer 130. Therefore, it is important to keep the thickness of the liquid crystal layer 130 uniform.
- the thickness of the liquid crystal layer 130 may vary depending on the phase difference value and the liquid crystal layer material to be implemented, but is generally 1 to 4, more preferably 1 to 3, most preferably 1 to 2 desirable.
- the thickness of the liquid crystal layer is less than 1, the distance through which the light passes through the liquid crystal is reduced, so that the polarization characteristics necessary for the optical filter are not exhibited in an even manner.
- the liquid crystal layer exceeds 4 // m, the alignment of the liquid crystal is not uniformly made to the upper layer. Because it does not.
- the liquid crystal layer 130 is supported by the partition wall portion 126 of the alignment film so that the alignment film The film is stably formed on the alignment film without being lowered laterally. Therefore, it is possible makol because not only can prevent the liquid crystal layer (13 0), reduction in thickness due to the articulated down, the liquid crystal layer 130 is accurately formed on the alignment film, a phenomenon that a pattern line width increased.
- the optical filter of the present invention maintains the pattern line width and the liquid crystal layer thickness stably, and thus exhibits excellent optical characteristics without deteriorating optical performance due to the increase in the line width and the decrease in the liquid crystal layer thickness.
- the liquid crystal layer 130 is preferably formed by the inkjet printing method similarly to the alignment film. Since the inkjet printing method can precisely adjust, using the inkjet printing method at the time of forming the liquid crystal layer has an advantage of precisely adjusting the thickness of the liquid crystal layer. More specifically, the liquid crystal layer 130 may be prepared by laminating a liquid crystal layer forming composition on an inkjet printer, applying a liquid crystal composition on an alignment layer through an inkjet nozzle, and then drying the liquid crystal composition.
- the liquid crystal composition may include a semi-ungwoong liquid crystal monomer and a solvent.
- the semi-ungwoong liquid crystal monomer refers to a composition which is polymerized while polymerizing with the surrounding monomers by light or heat.
- one or more kinds of monomers having an acrylate group, which is a semi-unggi group may be used. More specifically, Merck's RM (Reactive Mesogen) commercially available, BASF's LC242, etc. can be used.
- the solvent may vary depending on the liquid crystal composition used, in general, an aromatic solvent such as toluene, xylene, and acetate-based solvents such as Propylene Glycol Methyl Ether Acetate (PGMEA) may be used alone or in combination.
- acetate-based solvents such as Propylene Glycol Methyl Ether Acetate (PGMEA)
- PMEA Propylene Glycol Methyl Ether Acetate
- additives such as thickeners, crosslinkers, photoinitiators, surfactants, and the like may be further added to the liquid crystal composition, as necessary, as long as the physical properties are not impaired.
- the liquid crystal composition is not limited thereto, but the viscosity is 4 to
- the viscosity of the liquid crystal composition is less than 4 cp, the drop during inkjet printing This is because it is difficult to produce a satellite due to instability, poor straightness, and difficult to form a pattern. When the viscosity exceeds 20 cps, a print nozzle may be clogged. On the other hand, when the viscosity of the alignment film composition is in the range of 8 to 15cp, it is preferable because there is an advantage in that the stable jetting conditions can be continuously maintained in the process of performing the inkjet process.
- the liquid crystal composition is not limited thereto, but the boiling point is preferably about 13CTC to 200 ° C.
- the drying may proceed rapidly during jetting, which may cause nozzle clogging, and when the boiling point exceeds 20I C, the drying may not be performed properly.
- the drying after coating the liquid crystal composition is made of low temperature drying of 50 to 15CTC. If the dry silver is less than 5CTC, the drying is not performed properly, and if the dry silver is more than 15CTC, the base film may be damaged. In addition, the drying is preferably performed about 1 to 5 minutes.
- 3 to 5 illustrate various embodiments of an optical filter for a stereoscopic image display device according to an embodiment of the present invention. According to one embodiment, the optical filter for a stereoscopic image display device according to an aspect of the present invention, as shown in FIG. 3, an alignment layer 222 having different alignment directions on the substrate 210.
- the liquid crystal layer 230 may be alternately formed, and the liquid crystal layer 230 may be formed thereon.
- the alignment directions of the alignment layers 222 and 224 may be perpendicular to each other, and each of the alignment layers 222 and 224 may include a partition 226 having a higher edge height than the central portion 228.
- the liquid crystal layer 230 is aligned in accordance with the alignment direction of the lower alignment layer (222, 224), will have a different orientation.
- the liquid crystal layers 232 and 234 having different alignment directions may be formed to have phase difference values of ⁇ / 4 and ⁇ / 4.
- the alignment layer 320 and the liquid crystal layer 330 are disposed only on a portion of the substrate 310. It may be in the form formed.
- the alignment layer 320 is similar to the optical filter for the stereoscopic image display device of FIG.
- the retardation value of the liquid crystal layer is preferably ⁇ / 2.
- the retardation value of the liquid crystal layer is preferably ⁇ / 2.
- the left eye image and the right eye image pass through the retardation layer, and the image passing through the retardation layer has a retardation value delayed by ⁇ / 2 from the original.
- the left eye image and the right eye image become polarized states perpendicular to each other, thereby realizing a stereoscopic image.
- the alignment layer 420 and the liquid crystal layer 430 are disposed on a portion of one surface of the substrate 410.
- the retardation plate 440 may be attached to the other surface of the substrate 410.
- the liquid crystal layer 430 preferably has a phase difference value ⁇ / 2 as in FIG. 4, and the phase difference plate attached to the other surface of the substrate is preferably a ⁇ / 4 phase difference plate.
- the ⁇ / 4 phase difference plate may be formed by coating an alignment layer and a liquid crystal layer on one surface of the substrate, or may be formed by attaching a ⁇ / 4 phase difference plate made of a polymer substrate.
- one of the right eye image and the left eye image passes through a ⁇ / 2 phase difference layer made of a liquid crystal layer and has a phase difference value delayed by ⁇ / 2 and does not pass through the liquid crystal layer.
- a method for manufacturing an optical filter for a stereoscopic image display device that separates an image for a left eye and an image for a right eye, includes: (a) forming an alignment film; And (b) forming a liquid crystal layer.
- the forming of the alignment layer (a) refers to a step of forming an alignment layer having a predetermined pattern and a partition wall formed at an edge after printing the composition for forming the alignment layer on the substrate and drying the same.
- the alignment layer is a norbornene monomer; Acrylate monomers; Photoinitiator; And a composition for forming an alignment film including the remainder of the solvent in a predetermined pattern and then dried.
- the norbornene monomer is preferably substituted with a fluorine or cinnamate group, and the content in the composition for forming an alignment film is preferably 1 to 5% by weight.
- the acrylate monomer is used as a crosslinking agent, the content is preferably 1 to 6% by weight.
- the photoinitiator may be used Irgacure 306 or Irgacure 907, the content is preferably 0.1 to 2% by weight.
- the solvent is not particularly limited as long as the boiling point of the alignment layer composition is 130 to 18 CTC, and for example, aromatic solvents such as toluene and xylene, cyclopentanone, cyclonucleanone, and the like may be used alone or in combination. Can be.
- the content of the solvent should be included so that the total content of the alignment layer composition is 100% by weight, specifically, it is preferable that it is 87% by weight to 97.9% by weight.
- the printing may be formed through an inkjet printing method.
- the inkjet printing method is a non-contact printing method, there is little surface contamination at the time of printing, and various line widths can be realized by changing the position of the inkjet nozzle, so that it is suitable for small quantity production of various types.
- the alignment film can be formed only at a desired position, there is an advantage of less waste of material and a low production cost.
- the drying is preferably made of low temperature drying of 50 to 150 ° C, more preferably so to i (xrc).
- the said predetermined pattern means a stripe pattern, a checkerboard pattern, etc., for example.
- the partition wall portion is preferably formed to be 2 to 10 times, preferably 3 to 7 times, most preferably 5 to 6 times the thickness of the center portion of the alignment layer. If the height of the barrier rib portion is less than twice the thickness of the center of the alignment layer, the height of the barrier rib portion is too low compared to the center portion so as not to cover the liquid crystal having a thickness thereon.
- (b) forming the liquid crystal layer refers to forming a liquid crystal layer on the alignment layer.
- the liquid crystal layer is used to generate a phase difference, and the phase difference value depends on the thickness of the liquid crystal layer. Therefore, the liquid crystal layer is preferably uniformly formed, and the thickness thereof is preferably 1 to 4 ⁇ 11.
- the liquid crystal layer is preferably formed by an inkjet printing method similarly to the alignment film. This is because the inkjet printing method can precisely control the thickness of the liquid crystal layer.
- Example 1 Norbornene monomer in which cinnamate group and fluorine are substituted in the side for forming the alignment film
- UV was irradiated to form an alignment film.
- 6 is a result of measuring the shape of the alignment film formed by the above method with an optical measuring device (device name: non-contact 3D profiler, manufacturer: nano-system).
- the X axis represents a cross section of the formed pattern
- the y axis represents a height.
- a liquid crystal composition prepared by dissolving RMM 108 (manufactured by Merck Corporation) in PGMEA (polyethylene glycol methyl ether acetate) and ECA (ethyl carbyol acetate) in an amount of 25 wt% on the alignment layer was printed by inkjet printing. Form a layer.
- the viscosity of the liquid crystal composition is 4.8cp, the boiling point is 182 ° C.
- the drop pitch was patterned to 100, and the liquid crystal composition was jetted between partition walls of the alignment layer so as to be exactly positioned on the alignment layer. Dry at 60 ° C for 2 minutes in Aubon, and cure the liquid crystals by UV irradiation.
- Example 7 is a result of measuring the shape of the liquid crystal layer formed by the above method with an optical measuring device (device name: non-contact 3D profiler, manufacturer: nano-system).
- the X axis represents a cross section of the formed pattern
- the y axis represents a height.
- Example 3 An alignment layer was formed in the same manner as in Example 1 except that the viscosity was 12.1 cps and the boiling point was 169 ° C. using diisobutyl ketone as a solvent of the composition for forming an alignment layer. Next, the liquid crystal layer was formed in the same manner as in Example 1.
- Example 3
- FIG. 8 shows the shape of the alignment layer formed by the above method, and is measured by an optical measuring device (device name: non-contact 3D profiler, manufacturer: nanosystem).
- the X axis represents a cross section of the formed pattern
- the y axis represents a height. 8
- the RMM 108 manufactured by Merck Co., Ltd.
- a liquid crystal composition prepared by dissolving PGMEA (polyethylene glycol methyl ether acetate) and ECA (ethyl carbye acetate) was printed by inkjet printing to form a liquid crystal layer.
- the viscosity of the liquid crystal composition is 4.8cp, the boiling point is 182 ° C.
- the drop pitch was patterned at 100 / ⁇ , and the liquid crystal composition was jetted between partition walls of the alignment layer to be positioned exactly on the alignment layer. Dry at 60 ° C for 2 minutes in Aubon, and cure the liquid crystals by UV irradiation.
- FIG. 9 is a view showing the shape of the liquid crystal layer formed by the above method, which is measured by an optical measuring device (equipment name: non-contact 3D profiler, manufacturer: nanosystem).
- the x axis represents a cross section of the formed pattern
- the y axis represents a height.
- FIG. 10 shows the shape of the alignment film formed by the above method, it was measured by an optical measuring device (device name: non-contact 3D profiler, manufacturer: nano-system).
- the X axis represents a cross section of the formed pattern and the y axis represents a height.
- the alignment layer according to Comparative Example 2 has almost no partition wall and thus has a flat shape having a similar thickness to the center portion and the edge.
- a liquid crystal layer was formed on the alignment layer in the same manner as in Comparative Example 1.
- FIG. 11 shows the shape of the liquid crystal layer formed by the above method, and is measured by an optical measuring device (equipment name: non-contact 3D profiler, manufacturer: nanosystem).
- the X axis represents the cross section of the formed pattern and the y axis represents the height.
- Norbornene monomer in which cinnamate group and fluorine are substituted in the side for forming the alignment film A solution was prepared by dissolving 4% by weight, pentaerythritol triacrylate (PETA) and 4% by weight of photoinitiator (Igacure 907) in 91.5% by weight of cyclopentanone.
- PETA pentaerythritol triacrylate
- Igacure 907 photoinitiator
- the viscosity of the composition for forming an alignment film is 9.7 cps, and the boiling point is 130 ° C.
- An alignment layer was formed in the same manner as in Comparative Example 1 except for the rapid drying for 90 seconds at 15CTC after printing.
- FIG. 12 shows the cross-sectional shape of the alignment layer formed by the above method, and is measured by an optical measuring device (equipment name: non-contact 3D profiler, manufacturer: nanosystem).
- the X axis represents a cross section of the formed pattern
- the y axis represents a height.
- Figure 13 is a view showing a three-dimensional shape of the alignment film, it is the result measured by the optical measuring device NS-M100.
- the alignment film according to Comparative Example 3 has a portion where the height of the partition wall is not uniform (see A of FIG. 13), whereby the uniformity of the width and thickness of the alignment film in the linear direction is very poor. A pattern was formed.
- Examples 1 to 3 were reduced (dry) by about 4 -10 weight [)% after 3 minutes of drying as a result of the above-described experimental method, and according to the drying rate, the thickness of the edge of the alignment film Is formed in the range of 2 to 10 times the thickness of the core portion, the liquid crystal composition does not flow to the side of the alignment film, the line width of the pattern is maintained, it can be confirmed that the thickness of the liquid crystal layer is not thin.
- the weight% decreased after 3 minutes of drying is less than 1 weight (wt)%, and it can be confirmed that the partition wall is hardly formed by such a drying rate.
- Comparative Example 3 about 42 weight (wt)% is reduced after 3 minutes of drying, and according to such a drying rate, the drying rate is too fast, so that the height of the partition wall is not uniformly formed, and thus the straightness of the pattern is inferior. .
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Abstract
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US13/884,860 US8879009B2 (en) | 2010-11-11 | 2011-11-10 | Optical filter for a stereoscopic display device comprising one or more alignment layers each having partition wall parts with height greater than that of center part and stereoscopic display device comprising the same |
CN201180054614.2A CN103210340B (zh) | 2010-11-11 | 2011-11-10 | 光学滤波器及包含该光学滤波器的立体显示器 |
JP2013538645A JP5724149B2 (ja) | 2010-11-11 | 2011-11-10 | 立体映像表示装置用の光学フィルター及びこれを含む立体映像表示装置 |
EP11839616.7A EP2639624B1 (en) | 2010-11-11 | 2011-11-10 | Optical filter for a device for displaying stereoscopic images, and device for displaying stereoscopic images comprising same |
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KR10-2010-0111853 | 2010-11-11 | ||
KR20100111853 | 2010-11-11 | ||
KR10-2011-0105504 | 2011-10-14 | ||
KR1020110105504A KR101265314B1 (ko) | 2010-11-11 | 2011-10-14 | 입체영상표시장치용 광학필터 및 이를 포함하는 입체영상표시장치 |
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WO2012064124A2 true WO2012064124A2 (ko) | 2012-05-18 |
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EP (1) | EP2639624B1 (ko) |
JP (1) | JP5724149B2 (ko) |
KR (1) | KR101265314B1 (ko) |
CN (1) | CN103210340B (ko) |
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JP5922292B1 (ja) * | 2015-02-16 | 2016-05-24 | 住友化学株式会社 | 硬化性接着剤組成物及びそれを用いた偏光板 |
EP3368926B1 (en) * | 2015-10-30 | 2024-03-06 | Transitions Optical Ltd. | A method of making an optical article with an inkjet printing device |
KR102590072B1 (ko) * | 2016-07-29 | 2023-10-16 | 롤릭 테크놀로지스 아게 | 액정 폴리머 재료의 상부에 정렬을 생성시키는 방법 |
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JP3957430B2 (ja) * | 1998-09-18 | 2007-08-15 | シャープ株式会社 | 液晶表示装置 |
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KR100961265B1 (ko) * | 2003-06-23 | 2010-06-03 | 엘지디스플레이 주식회사 | 광학 보상 필름 및 이를 이용한 액정표시장치 |
GB2405544A (en) * | 2003-08-30 | 2005-03-02 | Sharp Kk | Light control element for outputting polarised light over different angular ranges. |
US7385660B2 (en) * | 2003-12-08 | 2008-06-10 | Sharp Kabushiki Kaisha | Liquid crystal display device for transflector having opening in a first electrode for forming a liquid crystal domain and openings at first and second corners of the domain on a second electrode |
KR20060015169A (ko) | 2004-08-13 | 2006-02-16 | 삼성전자주식회사 | 액정 표시 장치 및 그 제조 방법 |
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- 2011-10-14 KR KR1020110105504A patent/KR101265314B1/ko active IP Right Grant
- 2011-11-10 TW TW100141047A patent/TWI456260B/zh active
- 2011-11-10 WO PCT/KR2011/008558 patent/WO2012064124A2/ko active Application Filing
- 2011-11-10 EP EP11839616.7A patent/EP2639624B1/en active Active
- 2011-11-10 US US13/884,860 patent/US8879009B2/en active Active
- 2011-11-10 CN CN201180054614.2A patent/CN103210340B/zh active Active
- 2011-11-10 JP JP2013538645A patent/JP5724149B2/ja active Active
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Publication number | Publication date |
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CN103210340A (zh) | 2013-07-17 |
US20130222721A1 (en) | 2013-08-29 |
JP5724149B2 (ja) | 2015-05-27 |
EP2639624B1 (en) | 2020-04-22 |
KR101265314B1 (ko) | 2013-05-16 |
EP2639624A4 (en) | 2017-11-01 |
TWI456260B (zh) | 2014-10-11 |
WO2012064124A3 (ko) | 2012-07-05 |
KR20120050895A (ko) | 2012-05-21 |
CN103210340B (zh) | 2015-09-23 |
EP2639624A2 (en) | 2013-09-18 |
JP2013543992A (ja) | 2013-12-09 |
TW201241479A (en) | 2012-10-16 |
US8879009B2 (en) | 2014-11-04 |
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