WO2011093610A2 - 광학부재 및 그 제조방법 - Google Patents
광학부재 및 그 제조방법 Download PDFInfo
- Publication number
- WO2011093610A2 WO2011093610A2 PCT/KR2011/000350 KR2011000350W WO2011093610A2 WO 2011093610 A2 WO2011093610 A2 WO 2011093610A2 KR 2011000350 W KR2011000350 W KR 2011000350W WO 2011093610 A2 WO2011093610 A2 WO 2011093610A2
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- WIPO (PCT)
- Prior art keywords
- methyl methacrylate
- pmma
- mixture
- lower mold
- mma
- Prior art date
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
- G02B5/045—Prism arrays
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
- G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0065—Manufacturing aspects; Material aspects
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
- G02B6/0041—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided in the bulk of the light guide
Definitions
- the present invention relates to an optical member that can be applied to a display device, and more particularly, to an optical member having a predetermined pattern and a method of manufacturing the same.
- a display device such as a liquid crystal display device (LCD) is a device that emits light to reproduce an image, so that light can effectively travel to the front of the display device while minimizing loss of emitted light.
- LCD liquid crystal display device
- FIG. 1 is a schematic cross-sectional view of a general liquid crystal display.
- the liquid crystal display device includes a liquid crystal panel 10 and a backlight unit 20.
- the liquid crystal panel 10 includes a lower substrate, an upper substrate, and a liquid crystal formed between the lower substrate and the upper substrate, and reproduces an image by controlling light passing through the liquid crystal panel 10 by driving the liquid crystal. Done.
- the backlight unit 20 includes a light source 22, a light guide plate 24, and an optical sheet 26, and the light emitted from the light source 22 is the light guide plate 24 and the optical sheet 26. Through the incident to the inside of the liquid crystal panel 10.
- the light source 22 is disposed at the side of the light guide plate 24 to emit light toward the side of the light guide plate 24.
- the light guide plate 24 serves to guide the light emitted from the light source 22 toward the liquid crystal panel 10.
- the optical sheet 26 serves to uniformly transmit the light guided by the light guide plate 24 toward the liquid crystal panel 10.
- the optical sheet 26 includes a combination of a plurality of sheets such as a diffusion sheet and a prism sheet.
- the light guide plate 24 is formed with a predetermined pattern in order to allow the light incident on its side to travel to its front surface, that is, to change the traveling path of the light, and to constitute the optical sheet 26.
- a diffusion pattern, a prism sheet, and the like are also provided with a predetermined pattern in order to control the light incident from the bottom thereof in a desired form.
- the optical member such as the light guide plate 24 and the optical sheet 26 has a predetermined pattern formed to exhibit its function, and the conventional method for forming such a predetermined pattern uses the light guide plate 24.
- the following is described.
- the light guide plate 24 is formed of a plate of transparent material through which light can be transmitted, and a surface of the plate is formed with a predetermined pattern for changing a path of light.
- Conventional methods for forming the pattern include a laser cutting method and a printing method.
- the laser cutting method is a method of forming a predetermined pattern by forming a groove on one surface of the plate using a laser. This method has the disadvantage of generating a lot of debris and a disadvantage of losing productivity due to a long pattern formation time.
- the printing method is a method of forming a predetermined pattern by applying a special ink to one surface of the plate using a predetermined pattern mask.
- This method has a disadvantage in that the manufacturing cost is increased because the mask must be replaced periodically according to the life of the mask.
- the plate and the ink material patterned thereon are different from each other, a difference in refractive index of light occurs and thus, It is not easy to control and may also cause problems with the adhesion between the plate and the ink material.
- the present invention has been devised to solve the above disadvantages, the present invention can be patterned by a simple method in a relatively short time, and the optical member that does not cause a difference in refractive index and adhesion of light by being made of the same material as a whole It is an object to provide a method for producing the same.
- the present invention in order to achieve the above object, a step of applying a mixture of methyl methacrylate (MMA) and a light diffusing agent in a predetermined pattern on one surface of a substrate made of poly methyl methacrylate (PMMA); Polymerizing the applied methyl methacrylate (MMA) with poly methyl methacrylate (PMMA) to form polymethyl methacrylate (PMMA) in a semi-cured state; And it provides a method for producing an optical member comprising a step of fully curing the semi-cured poly methyl methacrylate (PMMA).
- MMA methyl methacrylate
- PMMA polymethyl methacrylate
- the step of applying the mixture of methyl methacrylate (MMA) and the light diffusing agent in a predetermined pattern, the step of applying the mixture to the entire surface of the substrate, and the step of contacting the mold of the predetermined pattern to the applied mixture Can be made.
- the process of applying the mixture of methyl methacrylate (MMA) and the light diffusing agent in a predetermined pattern may be performed by applying the mixture to a mold having a predetermined pattern, and laminating the substrate on the mixture.
- MMA methyl methacrylate
- the present invention also comprises the steps of forming a sealing member on the edge of the lower mold; Mounting a substrate made of poly methyl methacrylate (PMMA) on the lower mold inside the sealing member; Preparing an upper mold provided with a predetermined pattern, and fixing the upper mold on the sealing member with the predetermined pattern directed toward the lower mold; Injecting a mixture of methyl methacrylate (MMA) and a light diffusing agent between the lower mold and the upper mold to apply the mixture onto the substrate; Polymerizing the methyl methacrylate (MMA) with poly methyl methacrylate (PMMA) to form polymethyl methacrylate (PMMA) in a semi-cured state; And it provides a method for producing an optical member comprising a step of fully curing the semi-cured poly methyl methacrylate (PMMA).
- PMMA poly methyl methacrylate
- the process of injecting the mixture between the lower mold and the upper mold the process of injecting the mixture through an injection hole provided on one side of the sealing member formed between the lower mold and the upper mold, wherein, Air between the lower mold and the upper mold may be discharged through the air outlet provided on the other side.
- the process of injecting the mixture between the lower mold and the upper mold, the lower mold and the upper mold is carried out while maintaining the vertical, wherein the air outlet may be provided on the upper side of the sealing member.
- the present invention also comprises the steps of forming a sealing member on the edge of the lower mold; Mounting a substrate made of poly methyl methacrylate (PMMA) on the lower mold inside the sealing member; Dropping a mixture of methyl methacrylate (MMA) and a light diffusing agent onto the substrate; Preparing an upper mold provided with a predetermined pattern, and fixing the upper mold on the sealing member with the predetermined pattern directed toward the lower mold; Polymerizing the methyl methacrylate (MMA) with poly methyl methacrylate (PMMA) to form polymethyl methacrylate (PMMA) in a semi-cured state; And it provides a method for producing an optical member comprising a step of fully curing the semi-cured poly methyl methacrylate (PMMA).
- PMMA poly methyl methacrylate
- the step of polymerizing the methyl methacrylate (MMA) with poly methyl methacrylate (PMMA) and the step of fully curing the semi-cured poly methyl methacrylate (PMMA) may be carried out in a container containing a predetermined liquid. It may be made of a process of immersing the lower mold and the upper mold sealed by the sealing member. In this case, the step of immersing the lower mold and the upper mold, the end of the air discharge port provided in the sealing member may be so that the air between the lower mold and the upper mold is discharged.
- the process of polymerizing the methyl methacrylate (MMA) with poly methyl methacrylate (PMMA) may be performed by heating for 60 to 120 minutes at a temperature range of 30 to 100 °C.
- the process of completely curing the polymethyl methacrylate (PMMA) in the semi-cured state may be a process of heating for 3 to 10 minutes in the temperature range of 55 ⁇ 120 °C.
- the light diffusing agent may be formed of a bead structure.
- the invention also provides a substrate comprising poly methyl methacrylate (PMMA); And a predetermined pattern layer formed on one surface of the substrate and made of a mixture of a light diffusing agent and poly methyl methacrylate (PMMA).
- PMMA poly methyl methacrylate
- the light diffusing agent may be formed of a bead structure.
- the optical member may be a light guide plate, a diffusion sheet, or a prism sheet.
- the optical member manufactured by the present invention is composed of polymethyl methacrylate (PMMA), which is the same material as a whole, so that a difference in refractive index and adhesion of light do not occur between the substrate and the pattern layer, thereby enabling precise control of the light.
- PMMA polymethyl methacrylate
- the present invention manufactures an optical member having a predetermined pattern by using a predetermined mold, it is possible to manufacture an optical member having a desired pattern by a simple method in a relatively short time.
- the present invention has the effect that the light transmittance is improved because the light diffusing agent is included in the pattern layer.
- FIG. 1 is a schematic cross-sectional view of a general liquid crystal display device.
- FIGS. 2A to 2D are cross-sectional views schematically showing a manufacturing process of the optical member according to the first embodiment of the present invention.
- 3A to 3D are cross-sectional views schematically showing a manufacturing process of the optical member according to the second embodiment of the present invention.
- 4A to 4F are cross-sectional views schematically showing a manufacturing process of the optical member according to the third embodiment of the present invention.
- 5A to 5F are cross-sectional views schematically showing a manufacturing process of the optical member according to the fourth embodiment of the present invention.
- FIG. 6A is a cross-sectional view illustrating a process of injecting a mixture of methyl methacrylate (MMA) and a light diffusing agent according to one embodiment of the present invention
- FIG. 6B is methyl methacrylate (MMA) according to another embodiment of the present invention.
- MMA 7 is a cross-sectional view showing a curing process of methyl methacrylate (MMA) according to one embodiment of the present invention.
- FIGS. 2A to 2D are cross-sectional views schematically illustrating a manufacturing process of the optical member according to the first embodiment of the present invention.
- a substrate 100 consisting of poly methyl methacrylate (PMMA), methyl methacrylate (MMA) on the entire surface of the substrate 100
- PMMA poly methyl methacrylate
- MMA methyl methacrylate
- Polymethyl methacrylate (PMMA) constituting the substrate 100 may be suitably used as an optical member because of its excellent transmittance as a polymer in a solid state.
- the light diffusing agent 210 serves to enhance light transmittance by diffusing light and may be formed of a bead-shaped structure.
- an oxide such as SnO 2 , TiO 2 , ZnO 2 , SiO 2 , CeO 2, or the like may be used.
- the methyl methacrylate (MMA) 220 is a low molecule in the liquid state.
- the mixture 200a of methyl methacrylate (MMA) 220 and the light diffusing agent 210 is applied to the entire surface of the substrate 100 using a method known in the art, such as a nozzle method. do. If necessary, additives such as a polymerization initiator and a curing agent may be further included in the mixture 200a.
- the mold 300 having a predetermined pattern is prepared, and the mold 300 having a predetermined pattern is brought into contact with the mixture 200a applied to the substrate 100. Then, the mixture 200a of the light diffusing agent 210 and the methyl methacrylate (MMA) 220 is patterned to correspond to the pattern of the mold 300.
- MMA methyl methacrylate
- the pattern of the mold 300 is formed in consideration of the pattern of the optical member to be finally obtained, the pattern may be changed in various ways, such as a triangle, a circle, an oval, the cross section, the pattern having such a cross-section It may be variously modified to form, matrix, "+”, "X", "T".
- the curing process is a step of polymerizing the methyl methacrylate (MMA) with poly methyl methacrylate (PMMA) to form a polymethyl methacrylate (PMMA) in the semi-cured state, and the poly methyl meta in the semi-cured state It consists of a process of fully curing methacrylate (PMMA). Therefore, the pattern layer 200 made of a mixture of poly methyl methacrylate (PMMA) 230 and the light diffusing agent 210 is formed by the curing process.
- the methyl methacrylate (MMA) is a low molecular liquid
- the methyl methacrylate (MMA) is first polymerized with poly methyl methacrylate (PMMA) to be semi-cured into a gel state, and then the semi-cured gel To completely cure the polymethyl methacrylate (PMMA) in the state.
- the semi-cured means a gel state that is not completely cured and maintains a predetermined viscosity.
- the step of polymerizing the methyl methacrylate (MMA) to poly methyl methacrylate (PMMA) is preferably made of a step of heating for 60 to 120 minutes in a temperature range of 30 ⁇ 100 °C. If the polymerization process is less than 30 °C polymerization process is not made smoothly and takes a long time to polymerize, if it exceeds 100 °C due to the rapid polymerization reaction may cause a difference in the degree of polymerization may not exhibit uniform optical properties , Warping of polymethyl methacrylate (PMMA) may occur. If the polymerization process is less than 60 minutes, the polymerization may not be completed completely, if more than 120 minutes, productivity is reduced, the bending of poly methyl methacrylate (PMMA) may occur.
- Completely curing the semi-cured poly methyl methacrylate (PMMA) is preferably made of a step of heating for 3 to 10 minutes in the temperature range of 55 ⁇ 120 °C.
- the complete curing process is less than 55 °C curing time may take a long time and the curing may not be completed completely, if it exceeds 120 °C due to rapid curing may not express uniform optical properties, poly methyl methacrylate ( Warping of PMMA) may occur.
- the complete curing process is less than 3 minutes, curing may not be completed completely, and when more than 10 minutes, productivity is reduced, and the bending of polymethyl methacrylate (PMMA) may occur.
- the optical member 1 according to the present invention is composed of the polymethyl methacrylate (PMMA), the substrate 100 and the pattern layer 200 is made of the same material as a whole between the substrate 100 and the pattern layer 200 The adhesion problem does not occur.
- the optical member 1 according to the present invention includes the light diffusing agent 210 in the pattern layer 200, the light transmittance is improved.
- 3A to 3D are cross-sectional views schematically illustrating a manufacturing process of the optical member according to the second embodiment of the present invention.
- a mold 300 having a predetermined pattern is prepared, and a mixture 200a of methyl methacrylate (MMA) 220 and a light diffusing agent 210 is formed on the mold 300. ) Is applied. Then, the mixture 200a of the light diffusing agent 210 and the methyl methacrylate (MMA) 220 is patterned to correspond to the pattern of the mold 300.
- MMA methyl methacrylate
- a substrate 100 made of polymethyl methacrylate (PMMA) is laminated on the mixture 200a coated on the mold 300.
- the curing process is a step of polymerizing the methyl methacrylate (MMA) with poly methyl methacrylate (PMMA) to form a polymethyl methacrylate (PMMA) in the semi-cured state, and the poly methyl meta in the semi-cured state It consists of a process of fully curing methacrylate (PMMA).
- a pattern layer 200 made of a mixture of poly methyl methacrylate (PMMA) 230 and a light diffusing agent 210 is formed.
- 4A to 4F are cross-sectional views schematically illustrating a manufacturing process of an optical member according to a third exemplary embodiment of the present invention.
- the sealing member 450 is formed on the edge of the lower mold (410).
- the lower mold 410 is made of a flat plate, the sealing member 450 may be fixed to the edge of the lower mold 410 by a predetermined adhesive.
- the substrate 100 made of poly methyl methacrylate (PMMA) is mounted on the lower mold 410 inside the sealing member 450.
- PMMA poly methyl methacrylate
- the upper mold 430 having a predetermined pattern is prepared, and the upper mold 430 is formed on the sealing member 450 in a state in which the predetermined pattern is directed toward the lower mold 410. 430).
- the pattern of the upper mold 430 is formed in consideration of the pattern of the optical member to be finally obtained. As such, the lower mold 410 and the upper mold 430 are fixed to each other by the sealing member 450 to form a sealed inner space.
- the process of injecting the mixture 200a between the lower mold 410 and the upper mold 430 may be performed by forming a predetermined injection hole in the sealing member 450, which is illustrated in FIGS. 6A and 6B. Referring to the following.
- FIG. 6A is a cross-sectional view illustrating a process of injecting a mixture of methyl methacrylate (MMA) and a light diffusing agent 200a according to an embodiment of the present invention.
- the sealing member 450 includes An injection hole 452 is provided at one side of the mixture 200a, and an air discharge port 454 is provided at the other side of the mixture 200a.
- the inlet 452 and the air outlet 452 are formed at a higher position than the substrate 100.
- the mixture 200a through the injection hole 452 provided in the sealing member 450 while keeping the lower mold 410 and the upper mold 430 fixed by the sealing member 450 horizontally.
- the mixture 200a is applied onto the substrate 100 by injecting the mixture, and the air between the lower mold 410 and the upper mold 430 is injected into the mixture 200a and the air outlet 454. It is discharged to the outside through.
- FIG. 6B is a perspective view illustrating a process of injecting a mixture of methyl methacrylate (MMA) and a light diffusing agent according to another embodiment of the present invention.
- the sealing member 450 is injected into the sealing member 450.
- an air outlet 454 is provided on the other side. Therefore, by injecting the mixture through the injection hole 452 provided in the sealing member 450 while maintaining the lower mold 410 and the upper mold 430 fixed by the sealing member 450 vertically
- the mixture see 200a in FIG. 4d
- the substrate see 100 in FIG. 4d
- the mixture see 200a in FIG. 4d
- Air is discharged to the outside through the air outlet 454.
- the mixture (see 200a of FIG. 4D) is injected while the lower mold 410 and the upper mold 430 are maintained in a vertical state, and the air outlet 454 is sealed. Since it is formed on the upper side of the member 450, the injected mixture (200a of FIG. 4d) is less likely to leak through the air outlet 454, and the process control is easier.
- the mixture of the predetermined pattern (see 200a of Figure 4d) is cured.
- a curing process is a step of polymerizing the methyl methacrylate (MMA) with poly methyl methacrylate (PMMA) to form a polymethyl methacrylate (PMMA) in the semi-cured state, and polymethyl in the semi-cured state It consists of a process of completely curing methacrylate (PMMA).
- a pattern layer 200 made of a mixture of poly methyl methacrylate (PMMA) 230 and a light diffusing agent 210 is formed.
- the container containing the liquid 550 heated to a predetermined temperature may be immersed in the 500.
- the lower mold see 410 of FIG. 4E
- the upper mold see 430 of FIG. 4E
- the sealing member see 450 of FIG. 4E
- 5A to 5F are cross-sectional views schematically illustrating a manufacturing process of an optical member according to a fourth exemplary embodiment of the present invention. Detailed description of the same configuration as in the above-described third embodiment will be omitted.
- the sealing member 450 is formed at the edge of the lower mold 410.
- the substrate 100 made of poly methyl methacrylate (PMMA) is seated on the lower mold 410 inside the sealing member 450.
- PMMA poly methyl methacrylate
- the upper mold 430 is provided with a predetermined pattern, and the upper mold (top) on the sealing member 450 in a state that the predetermined pattern is directed toward the lower mold (410) 430).
- the mixture (see 200a of Figure 5d) is cured. That is, the methyl methacrylate (MMA) is polymerized with poly methyl methacrylate (PMMA) to form a polymethyl methacrylate (PMMA) in the semi-cured state, and then the poly methyl methacrylate (PMMA) in the semi-cured state Completely cured).
- MMA methyl methacrylate
- PMMA poly methyl methacrylate
- a pattern layer 200 made of a mixture of poly methyl methacrylate (PMMA) 230 and a light diffusing agent 210 is formed.
- the manufacturing method according to the present invention described above can be applied to the manufacture of various optical members, for example, a light guide plate, a diffusion sheet, or a prism sheet.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
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Abstract
Description
Claims (15)
- 폴리 메틸 메타크릴레이트(PMMA)로 이루어진 기판의 일면에, 메틸 메타크릴레이트(MMA) 및 광확산제의 혼합물을 소정 패턴으로 도포하는 공정;상기 도포한 메틸 메타크릴레이트(MMA)를 폴리 메틸 메타크릴레이트(PMMA)로 중합시켜 반경화 상태의 폴리 메틸 메타크릴레이트(PMMA)를 형성하는 공정; 및상기 반경화 상태의 폴리 메틸 메타크릴레이트(PMMA)를 완전경화시키는 공정을 포함하여 이루어진 광학부재의 제조방법.
- 제1항에 있어서,상기 메틸 메타크릴레이트(MMA) 및 광확산제의 혼합물을 소정 패턴으로 도포하는 공정은, 상기 기판의 일면 전체에 상기 혼합물을 도포하는 공정, 및 상기 도포한 혼합물에 소정 패턴의 금형을 접촉시키는 공정으로 이루어진 것을 특징으로 하는 광학부재의 제조방법.
- 제1항에 있어서,상기 메틸 메타크릴레이트(MMA) 및 광확산제의 혼합물을 소정 패턴으로 도포하는 공정은, 소정 패턴의 금형에 상기 혼합물을 도포하는 공정, 및 상기 혼합물 위에 상기 기판을 적층시키는 공정으로 이루어진 것을 특징으로 하는 광학부재의 제조방법.
- 하부금형의 가장자리에 실링부재를 형성하는 공정;상기 실링부재 안쪽의 상기 하부금형 상에 폴리 메틸 메타크릴레이트(PMMA)로 이루어진 기판을 안착시키는 공정;소정 패턴이 구비된 상부금형을 준비하고, 상기 소정 패턴이 상기 하부금형쪽으로 향하도록 한 상태로 상기 실링부재 위에 상기 상부금형을 고정하는 공정;상기 하부금형 및 상부금형 사이로 메틸 메타크릴레이트(MMA) 및 광확산제의 혼합물을 주입하여 상기 기판 상에 상기 혼합물을 도포하는 공정;상기 메틸 메타크릴레이트(MMA)를 폴리 메틸 메타크릴레이트(PMMA)로 중합시켜 반경화 상태의 폴리 메틸 메타크릴레이트(PMMA)를 형성하는 공정; 및상기 반경화 상태의 폴리 메틸 메타크릴레이트(PMMA)를 완전경화시키는 공정을 포함하여 이루어진 광학부재의 제조방법.
- 제4항에 있어서,상기 하부금형 및 상부금형 사이로 상기 혼합물을 주입하는 공정은, 상기 하부금형 및 상부금형 사이에 형성된 실링부재의 일측에 구비된 주입구를 통해 상기 혼합물을 주입하는 공정으로 이루어지고, 이때, 상기 실링부재의 타측에 구비된 공기배출구를 통해 상기 하부금형 및 상부금형 사이의 공기가 배출되는 것을 특징으로 하는 광학부재의 제조방법.
- 제5항에 있어서,상기 하부금형 및 상부금형 사이로 상기 혼합물을 주입하는 공정은, 상기 하부금형 및 상부금형을 수직으로 유지한 상태에서 수행하고, 이때 상기 공기배출구는 상기 실링부재의 상측에 구비된 것을 특징으로 하는 광학부재의 제조방법.
- 하부금형의 가장자리에 실링부재를 형성하는 공정;상기 실링부재 안쪽의 상기 하부금형 상에 폴리 메틸 메타크릴레이트(PMMA)로 이루어진 기판을 안착시키는 공정;상기 기판 상에 메틸 메타크릴레이트(MMA) 및 광확산제의 혼합물을 적하하는 공정;소정 패턴이 구비된 상부금형을 준비하고, 상기 소정 패턴이 상기 하부금형쪽으로 향하도록 한 상태로 상기 실링부재 위에 상기 상부금형을 고정하는 공정;상기 메틸 메타크릴레이트(MMA)를 폴리 메틸 메타크릴레이트(PMMA)로 중합시켜 반경화 상태의 폴리 메틸 메타크릴레이트(PMMA)를 형성하는 공정; 및상기 반경화 상태의 폴리 메틸 메타크릴레이트(PMMA)를 완전경화시키는 공정을 포함하여 이루어진 광학부재의 제조방법.
- 제4항 또는 제7항에 있어서,상기 메틸 메타크릴레이트(MMA)를 폴리 메틸 메타크릴레이트(PMMA)로 중합시키는 공정 및 상기 반경화 상태의 폴리 메틸 메타크릴레이트(PMMA)를 완전경화시키는 공정은, 소정의 액체가 수용된 용기 내에 상기 실링부재에 의해 밀봉된 하부금형 및 상부금형을 침지시키는 공정으로 이루어진 것을 특징으로 하는 광학부재의 제조방법.
- 제8항에 있어서,상기 하부금형 및 상부금형을 침지시키는 공정은, 상기 실링부재에 구비된 공기배출구의 말단은 침지되지 않도록 하여 상기 하부금형 및 상부금형 사이의 공기가 배출되도록 하는 것을 특징으로 하는 광학부재의 제조방법.
- 제1항 내지 제7항 중 어느 한 항에 있어서,상기 메틸 메타크릴레이트(MMA)를 폴리 메틸 메타크릴레이트(PMMA)로 중합시키는 공정은 30 ~ 100℃의 온도범위에서 60 ~ 120분 동안 가열하는 공정으로 이루어진 것을 특징으로 하는 광학부재의 제조방법.
- 제1항 내지 제7항 중 어느 한 항에 있어서,상기 반경화 상태의 폴리 메틸 메타크릴레이트(PMMA)를 완전경화시키는 공정은 55 ~ 120℃의 온도범위에서 3 ~ 10분 동안 가열하는 공정으로 이루어진 것을 특징으로 하는 광학부재의 제조방법.
- 제1항 내지 제7항 중 어느 한 항에 있어서,상기 광확산제는 비드 구조물로 이루어진 것을 특징으로 하는 광학부재의 제조방법.
- 폴리 메틸 메타크릴레이트(PMMA)로 이루어진 기판; 및상기 기판의 일면에 형성되며, 광확산제 및 폴리 메틸 메타크릴레이트(PMMA)의 혼합물로 이루어진 소정의 패턴층을 포함하여 이루어진 광학부재.
- 제13항에 있어서,상기 광확산제는 비드 구조물로 이루어진 것을 특징으로 하는 광학부재.
- 제13항에 있어서,상기 광학부재는 도광판, 확산시트, 또는 프리즘 시트인 것을 특징으로 하는 광학부재.
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CN2011800001761A CN102388326A (zh) | 2010-01-26 | 2011-01-18 | 光学部件及其制造方法 |
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WO2011093610A3 (ko) | 2011-12-01 |
US20120295020A1 (en) | 2012-11-22 |
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