WO2005109045A1 - プリズム一体型光拡散板及びその製造方法 - Google Patents
プリズム一体型光拡散板及びその製造方法 Download PDFInfo
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- WO2005109045A1 WO2005109045A1 PCT/JP2005/008138 JP2005008138W WO2005109045A1 WO 2005109045 A1 WO2005109045 A1 WO 2005109045A1 JP 2005008138 W JP2005008138 W JP 2005008138W WO 2005109045 A1 WO2005109045 A1 WO 2005109045A1
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- WIPO (PCT)
- Prior art keywords
- prism
- sheet
- light
- light diffusion
- diffusion plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
-
- 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
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
Definitions
- the present invention relates to a prism-integrated light diffusion plate, particularly to a prism-integrated light diffusion plate used for a liquid crystal backlight device or a lighting device having a light source such as a fluorescent tube, an LED, and an EL.
- the present invention relates to a prism-integrated light diffusion plate that combines both performances of a diffusion plate and achieves uniform diffusion light and improved brightness.
- a light diffusing plate is first installed to turn off a lamp image of a light source (fluorescent tube) of a knock light unit.
- This light diffusing plate is required to have a property of dispersing transmitted light at a wide angle with respect to the straight traveling direction.
- At least one prism sheet is usually interposed between the light diffusion plate and the liquid crystal unit with the light diffusion plate as a support.
- This prism sheet condenses and diffuses light within a range of angles effective for improving luminance.
- a light-diffusing prism sheet formed with fine ridges having a sawtooth cross section has been proposed.
- Patent Document 1 Japanese Patent Document 1
- Patent Document 1 Japanese Patent Application Laid-Open No. 9 304606
- the present invention provides a prism-integrated light diffuser plate that combines the performance of both a prism sheet and a light diffuser plate to achieve uniform diffusion light and to improve the brightness of an illumination cover and a large screen liquid crystal knock light. The task is to do so.
- the inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, by performing prism transfer onto a light diffusion sheet in a certain transmittance region in which the diffusivity of transmitted light is suppressed, diffusion diffusion and collection sufficient for practical use are performed.
- the inventors have found that a prism-integrated light diffusion plate having a function can be obtained, and have completed the present invention.
- the present invention provides:
- a plurality of convexes that also have a prismatic force on at least one side of a light diffusing sheet made of a transparent resin material containing a light diffusing agent and having a thickness of 0.5 to 3 mm and a total light transmittance of 60 to 95%.
- a prism-integrated light diffusion plate wherein a prism-shaped portion formed by forming a stripe portion is provided;
- the light diffusing agent consists of at least one selected from thermoplastic acrylic resin, polystyrene resin, crosslinked acrylic resin, crosslinked polystyrene resin, silicone resin, fluorine resin, silica, and quartz.
- a prism-integrated light diffusion plate according to claim 1 When light is incident perpendicular to the anti-prism surface, the ratio (dispersion degree) of the transmitted light intensity received in the 20 degree direction to the transmitted light intensity in the vertical direction is 0.02-0.7.
- the light diffusion sheet is superimposed on the surface of the embossing plate on which the prism pattern is formed, and the embossing plate and the light diffusion sheet are pressed by a pair of rolls arranged on the front and back sides of the embossing plate.
- a transfer step of transferring the embossed pattern to the diffusion sheet, a transfer step of transferring the embossed plate and the transfer-receiving sheet after transfer by an endless belt wound around at least one of the pair of rolls, and the transfer step A method for producing a prism-integrated light diffusion plate as described in 4 above, further comprising:
- a transparent resin sheet is inserted between the surface of the embossing plate on which the prism pattern is formed and the light diffusion sheet, and the embossing plate and the light are separated by a pair of rolls arranged on the front and back sides of the embossing plate. Pressing the diffusion sheet to transfer the emboss pattern to the transparent resin sheet and fusing the sheet to the light diffusion sheet; and winding the roll on at least one of the pair of rolls It is characterized by comprising a transport step of transporting the embossed plate and the sheet to be fused after transfer by an endless belt, and a peeling step of peeling the sheet to be fused with the emboss plate after the transport step.
- FIG. 1 is an explanatory view of one embodiment of a transfer device for producing a prism-integrated light diffusion plate of the present invention.
- FIG. 2 is an explanatory diagram for measuring a radius of a prism-integrated light diffusion plate of the present invention.
- FIG. 3 is an enlarged cross-sectional view of one embodiment of a prism-integrated light diffusion plate of the present invention.
- FIG. 4 is an embodiment of a triangular pyramid-shaped prism of the present invention.
- FIG. 5 (a) and (b) are one embodiment of the prism of the quadrangular pyramid shape of the present invention.
- FIG. 6 is an embodiment of the linear Fresnel-shaped prism of the present invention.
- the transparent resin constituting the transparent resin material of the present invention is not particularly limited as long as it has a light transmittance of 80% or more, preferably 85% or more. Therefore, polycarbonate resins, cyclopolyolefin resins, acrylic resins, polysulfone resins, polyarylate resins, polyethersulfone resins, etc., having a glass transition temperature or secondary transition temperature of 100 ° C or more are preferably used. You.
- polycarbonate resin acrylic resin and cyclopolyolefin resin are preferred.
- Examples of the transparent resin sheet (prism sheet) used in the present invention include a sheet obtained using the above-mentioned transparent resin.
- the thickness of the sheet is 0.5 to 3 mm, preferably 0.6 to 2 mm.
- the light diffusing agent used in the present invention is at least one selected from crosslinked acrylic resin, crosslinked polystyrene resin, silicone resin, fluorine resin, silica, quartz, titanium oxide, and zinc oxide. Is used.
- the light diffusing agent has an average particle diameter of 1 to 200 ⁇ m, preferably 3 to: LOO ⁇ m particles (beads, powder) and Z or its fiber length Z fiber diameter (LZD) 2 to: about L00 Are preferred.
- thermoplastic acrylic resin particles When a polycarbonate resin is used as the transparent resin, a combination of thermoplastic acrylic resin particles, crosslinked acrylic resin particles, and quartz fibers is particularly preferable as the light diffusing agent.
- the transparent resin material used in the light diffusion sheet in the present invention is a transparent resin and its transparent resin. It contains 0.1 to 20 parts by mass, preferably 0.5 to 15 parts by mass of the light diffusing agent with respect to 0 parts by mass.
- the thickness of the light diffusion sheet is preferably 0.5 to 3 mm, more preferably 0.6 to 2 mmfe.
- the thickness of the light diffusion sheet is 0.5 mm or more, the rigidity is appropriate, and when incorporated in a direct backlight, the flatness is maintained without bending due to its own weight.
- the thickness of the light diffusion sheet is 3 mm or less, the optical characteristics do not decrease and the lightness is maintained.
- the total light transmittance of this light diffusion sheet is 60 to 95%, preferably 65 to 93%.
- the total light transmittance is within the above range, a prism-integrated light diffusion plate that is practically usable can be obtained.
- the amount of the light diffusing agent should be selected by adjusting the light diffusing function according to the optical characteristics of the prism-shaped portion formed on the surface layer of the light diffusing sheet.
- the shape of the prism formed on the surface layer of the light diffusion sheet is not particularly limited as long as it is formed on the light diffusion sheet so that the incident light of the light source power is condensed and diffused, thereby improving luminance and reducing luminance unevenness. Absent.
- a prism having a shape of linear, triangular pyramid, quadrangular pyramid or the like, a Fresnel lens, a lenticular lens shape, or the like can be given.
- the prism-integrated light diffusion plate of the present invention has a ratio (dispersion degree) of the transmitted light intensity received in the 20-degree direction to the transmitted light intensity in the vertical direction when light is incident perpendicularly to the anti-prism surface.
- the force is 0.02 to 0.7, preferably 0.1 to 0.6.
- the integration of the prism improves the brightness and the diffusivity.
- the transmitted light intensity ratio is less than 0.02, the diffusivity is too low and the luminance unevenness increases.
- a preferred embodiment of the method for producing a light diffusing sheet in the present invention will be described in detail below with a polycarbonate resin as a representative example of the transparent resin.
- a transparent resin material obtained by blending a polycarbonate resin with a light diffusing agent is dried, extruded by an extruder with a devolatilizer, and formed into a sheet.
- the drying conditions are preferably 120 to 140 ° C. and 2 to LO time, and more preferably 120 to 140. C, 4 to 10 hours.
- the drying treatment can be generally performed in an atmosphere such as heated air, dry air, or under vacuum.
- a devolatilizing device is required for an extruder for forming a sheet.
- This devolatilizer can reduce the pressure to below atmospheric pressure in a molten state, and usually reduces the pressure to 8 kPa or less, preferably 4 kPa or less during extrusion.
- This vacuum devolatilization not only removes water and volatile reaction by-products remaining in the transparent resin material, but also removes secondary volatile reaction by-products generated by extrusion molding. it can.
- the die temperature is usually 200-260. C, preferably 200-250. C, more preferably 200-240 ° C.
- the die temperature exceeds 260 ° C, the polycarbonate resin is liable to be thermally degraded, causing yellowing of the sheet and causing poor light transmittance and poor appearance.
- the temperature of the cooling roll during sheet forming is about 120 to 180 ° C, preferably 120 to 170 ° C.
- the rigidity of the melt of the transparent resin material is so high that sizing between nip rolls is difficult, and the uniformity of the surface state in the width direction and longitudinal direction can be maintained.
- uneven diffusion in the light diffusion sheet is likely to occur.
- At least one surface of the light diffusion sheet has a plurality of protrusions that also have a prismatic force.
- the method of forming the ridge portion and providing the prism-shaped portion There is no particular limitation on the method of forming the ridge portion and providing the prism-shaped portion. For example, (1) a method in which the prism-shaped portion is directly formed on the light diffusion sheet, and A method of fusing a transparent resin sheet to form the prism-shaped portion is preferably used.
- a method of providing a prism-shaped portion a method of forming a prism-shaped portion by injection molding or press molding using a mold having a prism formed therein, or a method of forming an acrylic transparent thermoset on a mold having a prism formed therein. Apply or inject fat and paste a diffusion plate on it, then irradiate electron beam, radiation, ultraviolet rays, etc. from the diffusion plate side or heat to cure the curable resin into prism shape Then, there is a method of obtaining a prism-shaped light diffusion plate by peeling off in a state of being bonded to the diffusion plate.
- the light diffusion sheet is superimposed on the surface of the embossing plate of the sheet on which the prism pattern is formed, and the embossing is performed by a pair of rolls arranged on the front and back sides of the embossing plate.
- a method including a transporting step of transporting the transfer sheet and, after the transporting step, a peeling step of peeling off the transfer-receiving sheet by the embossing plate force is used.
- the transfer device shown in FIG. 1 can be used.
- FIG. 1 is an explanatory view showing one embodiment of a transfer device for producing a prism-integrated light diffusion plate of the present invention in which a prism-shaped portion is provided on a light diffusion sheet.
- This device 10 includes a pair of transfer rolls. There is a heating roll 1 and a rubber roll 2, and a pre-heating roll 3 and a cooling roll 4 for cooling after transfer are arranged.
- it is constituted by an endless belt 6 around which a heating roll 1 side of a transfer roll, a preliminary heating roll 3, a cooling roll 4, and a transport roller 5 are wound.
- a transparent resin sheet is interposed between the light diffusion sheet and the surface of the sheet embossing plate on which the prism pattern is formed, and the front and back sides of the embossing plate are The embossing plate and the light diffusion sheet are sandwiched by a pair of rolls arranged at the same time to transfer the emboss pattern to the transparent resin sheet and to light-expand this film.
- the transfer device shown in FIG. 1 can be used.
- the obtained prism-integrated light diffusion plate When the obtained prism-integrated light diffusion plate is incorporated in a knock light, it is arranged immediately above a fluorescent tube as a light source.
- PC Teflon FN1700A manufactured by Idemitsu Petrochemical
- PMMA MB X-20 manufactured by Sekisui Plastics, average particle size m
- the pellets were extruded through a T-die forming die using a vented extruder to obtain a light diffusion sheet having a wall thickness of t force S2mm.
- the obtained light diffusion sheet was transferred to a transfer device shown in FIG. 1 with a transfer roll temperature of 210 ° C., a height h of 25 ⁇ m for a bottom width d of 0 ⁇ m, and a convex peak angle of ⁇ .
- the light diffusion sheet having a thickness of 2 mm obtained in Example 1 was transferred to the transfer device of Example 1 at a transfer roll temperature of 160 ° C. and a height h force of 0.8 with respect to a bottom width d force of 0 ⁇ m. ⁇ m fine
- a fine regular triangular pyramid shape was formed to obtain a prism-integrated light diffusion plate (see Fig. 4).
- the light diffusion sheet having a thickness of 2 mm obtained in Example 1 was transferred to the transfer device of Example 1 at a transfer roll temperature of 160 ° C and a height h of 25 ⁇ m for a bottom width d force of 0 ⁇ m.
- a diffusion plate was obtained.
- the light-diffusing sheet having a thickness of 2 mm obtained in Example 1 was transferred to the transfer device of Example 1 at a transfer roll temperature of 210 ° C., and the bottom surface was a rectangle of d 50 / zm X d 282 m, and the height was
- h 25 / ⁇ ⁇
- apex angle on the short side ⁇ 90 degrees apex angle on the long side ⁇ power
- a shape (quadrangular pyramid 2, see FIG. 5b) was formed to obtain a prism-integrated light diffusion plate.
- the light-diffusing sheet having a thickness of 2 mm obtained in Example 1 was transferred to the transfer device of Example 1 with a transfer roll temperature of 160 ° C, a pitch d force of 200 / ⁇ , and a focal length F of 30 mm.
- a Fresnel shape (see Fig. 6) was formed, and a linear Fresnel integrated light diffusion plate was obtained.
- L indicates a line light source.
- a prismatic light diffusion plate was obtained in the same manner as in Example 1, except that the light diffusing agent was changed to 3 parts by mass.
- Example 1 a prism-integrated light was used in the same manner as in Example 1 except that 3 parts by mass of crosslinked acrylic resin particles (XX03BZ manufactured by Sekisui Plastics, average particle size 100 m) were used as the light diffusing agent. A diffusion plate was obtained.
- crosslinked acrylic resin particles XX03BZ manufactured by Sekisui Plastics, average particle size 100 m
- Example 1 1 part by mass of crosslinked acrylic resin particles (PMMA: Sekisui Plastics Co., Ltd., MBX-20, average particle size 20 m) as a light diffusing agent and crosslinked acrylic resin particles (PMMA: Sekisui Plastics Co., Ltd.) XX03BZ, average particle size 100 ⁇ m)
- PMMA Sekisui Plastics Co., Ltd.
- XX03BZ average particle size 100 ⁇ m
- PMMA MBX-20, manufactured by Sekisui Plastics Co., Ltd., average particle size: 20 ⁇ m
- Example 1 5 parts by mass of cross-linked acrylic resin particles (PMMA: MBX-5, manufactured by Sekisui Plastics, average particle size: 5 m) were used as a light diffusing agent, and were extruded into a sheet having a thickness of 0.6 mm. Then, a prism-integrated light diffusion plate was obtained in the same manner as in Example 1 except that a light diffusion sheet was obtained.
- PMMA cross-linked acrylic resin particles
- MBX-5 manufactured by Sekisui Plastics, average particle size: 5 m
- Example 1 a prism-integrated light diffusion plate was obtained in the same manner as in Example 6, except that a light diffusion sheet was obtained by extrusion molding into a sheet having a thickness of 1 mm.
- Example 1 a prism-integrated light diffusion plate was obtained in the same manner as in Example 6, except that a light diffusion sheet was obtained by extrusion molding into a sheet having a thickness of 1.5 mm.
- Example 13 a prism-integrated light diffusion plate was obtained in the same manner as in Example 6, except that a light diffusion sheet was obtained by extrusion molding into a sheet having a thickness of 1.5 mm.
- Example 1 On the 2 mm light diffusion sheet of Example 1, a 100 ⁇ m polycarbonate film (Plastic Ace ECG100 made of plastic in a cylinder) was superimposed, and at the same time as lamination, prism transfer was performed in the same manner as in Example 1. A body light diffusion plate was obtained.
- a 100 ⁇ m polycarbonate film (Plastic Ace ECG100 made of plastic in a cylinder) was superimposed, and at the same time as lamination, prism transfer was performed in the same manner as in Example 1. A body light diffusion plate was obtained.
- a 125 ⁇ m polymethyl methacrylate film (PMMA: Atariplane HBS manufactured by Mitsubishi Rayon) was superimposed on the 2 mm light diffusion sheet of Example 1, and simultaneously with lamination, the prism integrated type A light diffusion plate was obtained.
- PMMA Atariplane HBS manufactured by Mitsubishi Rayon
- the pellets were extruded through a T-die forming die using a vent type extruder to obtain a light diffusion sheet having a thickness t of 2 mm.
- the obtained light diffusion sheet was transferred to a transfer device shown in FIG. 1 at a transfer roll temperature of 180 ° C., a height h of 25 ⁇ m for a bottom width d of 0 ⁇ m, and a convex apex angle of ⁇ .
- a fine sawtooth (linear) cross section was formed to obtain a prism-integrated light diffusion plate.
- the pellets are injection-molded using a microfabricated mold under the conditions of a cylinder temperature of 250 ° C and a mold temperature of 80 ° C.
- the height h is ⁇ ⁇ ⁇ ⁇ 5 / ⁇ for a base width d of 50 m. m, convex angle ⁇
- a fine sawtooth (linear) cross section with a 1 1 1 force of S90 ° was formed to obtain a prism-integrated light diffusion plate.
- Polycarbonate resin as transparent resin PC: FN1700A manufactured by Idemitsu Petrochemical
- PC transparent resin
- PMMA Sekisui Plastics MBX20
- the pellets are injection-molded using a microfabricated mold under the conditions of a cylinder temperature of 250 ° C and a mold temperature of 80 ° C.
- the height h is ⁇ ⁇ ⁇ ⁇ 5 / ⁇ for a base width d of 50 m. m, convex angle ⁇
- a fine sawtooth (linear) cross section with a 1 1 1 force of S90 ° was formed to obtain a prism-integrated light diffusion plate.
- the pellets were extruded through a T-die forming die using a vent type extruder to obtain a light diffusion sheet having a thickness t of 2 mm.
- the following ultraviolet-curable resin composition was applied to an aluminum mold having the same prism shape as in Example 1 and the surface thereof was smoothed. After that, the light diffusion sheet was overlaid, and 320 to 390 nm.
- the ultraviolet curable resin composition was cured by irradiating 1000 mj / cm 2 of ultraviolet light at the integrated ultraviolet light amount.
- the mold force was also peeled off to obtain a light diffusion plate with a fine sawtooth-shaped (linear) prism integrated section having a bottom width d of 50 m, a height h force of 5 m, and a convex apex angle of ⁇ .
- Example 2 On one side (anti-prism transfer surface) of the 2 mm light diffusion plate obtained in Example 1, a light stabilizer (Udable UV-G12 manufactured by Nippon Shokubai Co., Ltd.) was added to diacetone alcohol so that the solid content was 20% by mass. Apply the solution diluted with in a bar coater to a coating thickness of 5 ⁇ m. A light-resistant prism-integrated light diffusion plate was obtained on the surface opposite to the coated surface in the same manner as in Example 1.
- a light stabilizer Udable UV-G12 manufactured by Nippon Shokubai Co., Ltd.
- Example 1 a prism was prepared in the same manner as in Example 1 except that 5 parts by mass of crosslinked acrylic resin particles (PMMA: MBX5 manufactured by Sekisui Plastics, average particle size: 5 m) were used as a light diffusing agent. A body-shaped light diffusion plate was obtained.
- PMMA crosslinked acrylic resin particles
- MBX5 manufactured by Sekisui Plastics, average particle size: 5 m
- Example 1 0.5 parts by mass of crosslinked acrylic resin particles (PMMA: XX02BZ manufactured by Sekisui Plastics, average particle size 200 m) was used as a light diffusing agent, and a light diffusing sheet having a thickness t of lmm was used.
- a prism-integrated light diffusion plate was obtained in the same manner as in Example 1 except that the light diffusion plate was obtained.
- Example 1 0.5 parts by mass of crosslinked acrylic resin particles (PMMA: XX02BZ manufactured by Sekisui Plastics Co., Ltd., average particle size 200 m) were used as the light diffusing agent, and the light diffusion with a wall thickness t of 0.2 mm was used.
- a prism-integrated light diffusion plate was obtained in the same manner as in Example 1 except that a sheet was obtained.
- Example 1 a light diffusion sheet having a thickness t of 5 mm was obtained using l parts by mass of crosslinked acrylic resin particles (PMMA: MBX20 manufactured by Sekisui Plastics, average particle size 20 m) as a light diffusion agent. Except for the above, a prism-integrated light diffusion plate was obtained in the same manner as in Example 1.
- PMMA crosslinked acrylic resin particles
- MBX20 manufactured by Sekisui Plastics, average particle size 20 m
- Tables 11 and 12 show the evaluation results of the prism-integrated light diffusion plates obtained in the above Examples and Comparative Examples.
- A belt transfer
- B injection molding
- C transfer to a transparent resin cured layer.
- Example 6 FN1700 2 PMMA particle drawn 20 ⁇ 3 80 0.6 93 A 12000 2000 Linear 13500 800 0.5
- Example 8 FN1700 2 88 0.3 90 A 12500 3000 Linear 16000 1500
- Example 9 FN1 700 2 Diameter 10 ⁇ 82 0.3 94 A 12500 1800 Linear 13500 500 ⁇ 0.5 Silica fiber 1
- Example 12 FN1700 1.5 PMMA crosslinked particles 20 ⁇ 3 82 0.5 78 A 13500 3500 Linear 15000 1500 0.6
- Example 14 FN1700 2 PMMA crosslinked particles 20 pm 1 94 0.06 85 A 13000 3000 Linear PMMA film 900
- Example 15 Acrypet V2 PS particles 12 ⁇ 2 90 0.3 85 A 16000 2500 Linear 17800 1000 g 0.5 Zeonor
- Example 16 2 PS Particles 12pm 2 85 0.3 80 B
- Comparative Example 3 the film had a large radius when the backlight was incorporated.
- Comparative Example 4 when the composition was the same as that in Example 1, the light transmittance was reduced due to the thickness of the light diffusion sheet, and the luminance due to the prism transfer was reduced. The power was not improved.
- the thickness of the light diffusion sheet exceeds 3 mm, the mass of the knock light itself increases, and assembling of the knock light requires a lot of manual work at present, which makes it difficult to assemble the knock light.
- the prism-integrated light diffusion plate of the present invention is a thin monolayer in which light diffusion and luminance improvement have been conventionally performed using a plurality of sheets and films without disturbing their functions. Because it is a sheet, the work process can be simplified and the cost can be reduced, and the diffused light is uniform and the effect of improving the brightness of the backlight of a liquid crystal display or the like is great.
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Abstract
Description
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Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/578,550 US7697206B2 (en) | 2004-05-11 | 2005-04-28 | Prism-integrated light-diffusing plate and method of manufacture |
| DE112005000835T DE112005000835T5 (de) | 2004-05-11 | 2005-04-28 | Lichtdiffusionsplatte mit integriertem Prisma und Verfahren zur Herstellung derselben |
| KR1020067023592A KR101118455B1 (ko) | 2004-05-11 | 2006-11-10 | 프리즘 일체형 광확산판 및 그의 제조방법 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004-140838 | 2004-05-11 | ||
| JP2004140838A JP5009491B2 (ja) | 2004-05-11 | 2004-05-11 | 液晶バックライト装置用プリズム一体型光拡散板 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2005109045A1 true WO2005109045A1 (ja) | 2005-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2005/008138 Ceased WO2005109045A1 (ja) | 2004-05-11 | 2005-04-28 | プリズム一体型光拡散板及びその製造方法 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US7697206B2 (ja) |
| JP (1) | JP5009491B2 (ja) |
| KR (1) | KR101118455B1 (ja) |
| CN (1) | CN100578264C (ja) |
| DE (1) | DE112005000835T5 (ja) |
| TW (1) | TW200538766A (ja) |
| WO (1) | WO2005109045A1 (ja) |
Families Citing this family (34)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040207774A1 (en) * | 2003-04-17 | 2004-10-21 | Gothard David L. | Illumination apparatus for LCD/organic displays |
| TWI318172B (en) * | 2005-11-23 | 2009-12-11 | Eternal Chemical Co Ltd | Optical thin sheet |
| JP2008279597A (ja) | 2006-05-10 | 2008-11-20 | Oji Paper Co Ltd | 凹凸パターン形成シートおよびその製造方法、反射防止体、位相差板、工程シート原版ならびに光学素子の製造方法 |
| KR101295551B1 (ko) * | 2006-07-14 | 2013-08-12 | 삼성디스플레이 주식회사 | 광조절 조립체와 이의 제조방법 및 이를 포함하는액정표시장치 |
| KR101262176B1 (ko) * | 2006-11-14 | 2013-05-14 | 삼성디스플레이 주식회사 | 광학부재의 제조방법 |
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Also Published As
| Publication number | Publication date |
|---|---|
| US7697206B2 (en) | 2010-04-13 |
| CN100578264C (zh) | 2010-01-06 |
| CN101103284A (zh) | 2008-01-09 |
| JP2005321681A (ja) | 2005-11-17 |
| KR101118455B1 (ko) | 2012-03-07 |
| DE112005000835T5 (de) | 2007-04-26 |
| JP5009491B2 (ja) | 2012-08-22 |
| TW200538766A (en) | 2005-12-01 |
| US20070195418A1 (en) | 2007-08-23 |
| KR20070015571A (ko) | 2007-02-05 |
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