WO2007086245A1 - 光拡散性シート - Google Patents
光拡散性シート Download PDFInfo
- Publication number
- WO2007086245A1 WO2007086245A1 PCT/JP2007/050017 JP2007050017W WO2007086245A1 WO 2007086245 A1 WO2007086245 A1 WO 2007086245A1 JP 2007050017 W JP2007050017 W JP 2007050017W WO 2007086245 A1 WO2007086245 A1 WO 2007086245A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light diffusing
- light
- diffusing sheet
- acrylic resin
- acrylic
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
-
- 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
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0226—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures having particles on the surface
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
-
- 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
- Y10T428/254—Polymeric or resinous material
Definitions
- the present invention relates to a light diffusing sheet that is suitably used as a member constituting a knocklight device that is suitably used for applications such as a liquid crystal display.
- a light diffusing sheet is used to make the light diffusion pattern of the light guide plate invisible or to increase the luminance in the front direction.
- a light diffusing sheet a light diffusing sheet or the like in which a light diffusing layer containing a transparent binder resin and plastic beads is provided on one side of a support is generally used.
- Patent Document 1 JP-A-8-75909 (Claims)
- an object of the present invention is to provide a light diffusive sheet that can improve the front luminance without requiring a complicated design and prevent the occurrence of curling.
- the light diffusive sheet of the present invention that solves the above problems has a light diffusible layer on a support, and the light diffusible layer comprises at least acrylic resin particles, styrene-acryl copolymer resin resin vine. Acrylic resin binder having a binder and glass transition temperature of 30 ° C or less is also formed.
- the weight ratio of the styrene-acrylic copolymer resin binder to the acrylic resin binder is in the range of 1: 4 to 4: 1.
- the light diffusing layer is composed of acrylic resin particles, styrene-acrylic copolymer resin binder, and acrylic resin binder having a glass transition temperature of 30 ° C or less.
- the support can be used without particular limitation as long as it has light permeability.
- a support for example, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyethylene, polypropylene, polystyrene, triacetyl cellulose, acrylic, polyvinyl chloride, and the like are used. be able to.
- a polyethylene terephthalate film having a stretched process, particularly a biaxially stretched film is preferable in that it has excellent mechanical strength and dimensional stability.
- a surface subjected to corona discharge treatment or provided with an easy adhesion layer is also preferably used.
- the thickness of the support is usually about 20 to 400 / ⁇ ⁇ .
- the practical lower limit of thickness is about 50 m from the viewpoint of preventing the generation of force, but in the present invention, the force thickness depending on the composition of the light diffusive layer is 50 m. Even with the following thin support, curling can be prevented.
- the light diffusing layer of the light diffusing sheet comprises at least acrylic resin particles, a styrene acrylate copolymer resin binder, and an acrylic resin binder having a glass transition temperature of 30 ° C or lower. It is formed from scratch. By configuring the light diffusive layer in such a manner, a light diffusable sheet that can improve the front luminance and the anti-curl property can be obtained.
- the acrylic resin particles form irregularities on the surface of the light diffusing layer to generate external haze, and also generate internal haze due to a difference in refractive index from the binder resin, and the action of these external haze and internal haze. Therefore, it has a role of improving the front luminance and light diffusibility.
- the acrylic resin particle is not particularly limited as long as it is a particle formed from a material strength containing a resin usually referred to as an acrylic resin, but polymethylmethacrylate. It is preferable to use true spherical particles.
- the acrylic resin particles are preferably those crosslinked with dibulebenzene or the like in terms of heat resistance, solvent resistance, and heat stability.
- the average particle size of the acrylic resin particles is usually about 5 to 40 ⁇ m. In general light diffusing sheets, a light diffusing agent having an average particle size of about 10 to 15 m is used. In the present invention, curling is prevented even for large particles having an average particle size of 15 ⁇ m or more. can do. It is preferable to determine the average particle size of the acrylic resin particles in consideration of the thickness of the support. When the thickness of the support is 50 m or less, the average particle size is 5 ⁇ m to 15 m. When the thickness of the support preferably exceeds 50 m, the average particle diameter is preferably 15 ⁇ m or more and 22 ⁇ m or less. By setting such a range, the balance between front luminance and anti-curl property can be improved.
- the acrylic resin particles preferably have a coefficient of variation of particle size distribution of 10 to 40%.
- the coefficient of variation is a value indicating the dispersion state of the particle size distribution, which is a value obtained by dividing the standard deviation of the particle size distribution (square root of unbiased dispersion) by the arithmetic average value (average particle size) of the particle size. Percentage.
- the content of the acrylic resin particles varies depending on the average particle diameter of the particles depending on the thickness of the light diffusing layer, and cannot be generally stated, but is about 50 to 270 parts by weight with respect to 100 parts by weight of the resin binder. Degree. In the present invention, curling can be prevented even when 200 parts by weight or more of acrylic resin particles are added to 100 parts by weight of the resin binder.
- Acrylic resin It is preferable to determine the content of the particles in consideration of the thickness of the support, etc. When the thickness of the support is preferably over 50 parts by weight, it is more preferred to be 200 parts by weight or more and 250 parts by weight or less with respect to 100 parts by weight of the resin binder. By setting it as such a range, the balance between front luminance and anti-curl property can be improved.
- the styrene-acrylic copolymer resin binder can be obtained by copolymerizing an acrylic monomer (or acrylic resin) and a styrene monomer (or styrene resin).
- an acrylic monomer or acrylic resin
- a styrene monomer or styrene resin
- acrylic monomer examples include methacrylate monomers such as methyl methacrylate and ethyl methacrylate, acrylate monomers such as methyl acrylate and ethyl acrylate, hydroxy shetyl methacrylate, Acrylamide and the like can be exemplified as typical examples, and styrene-based monomers can be exemplified as styrene, (X-methylstyrene, butyltoluene and the like. In addition, these monomers are necessary as main components for copolymerization. Depending on the case, other monomers can be copolymerized.
- the ratio of the styrene component to the acrylic component in the styrene-acrylic copolymer resin binder is preferably 1: 4 to 4: 1 by weight. By setting it as such a range, the front brightness
- the styrene-acrylic copolymer resin binder preferably has a glass transition temperature of 40 ° C or higher, more preferably a glass transition temperature of 70 ° C or higher.
- a resin binder having a glass transition temperature of 40 ° C. or higher the front luminance and light diffusibility of the light diffusing sheet can be improved.
- the glass transition temperature can be adjusted by appropriately changing the degree of polymerization of the resin, the ratio of the acrylic component and the styrene component in the resin.
- the glass transition temperature of styrene homopolymer is 100 ° C
- the glass transition temperature can be adjusted by selecting an acrylic monomer to be copolymerized therewith.
- acrylic monomers are known to have glass transition temperatures from 0 ° C or lower to 100 ° C or higher
- the glass transition temperature can be adjusted by selecting the type of acrylic component.
- the degree of polymerization of the resin the ratio of the acrylic component and the styrene component in the resin.
- the glass transition temperature of styrene homopolymer is 100 ° C
- acrylic monomers are known to have glass transition temperatures from 0 ° C or lower to 100 ° C or higher
- the glass transition temperature can be adjusted by selecting the type of acrylic component.
- An acrylic resin binder having a glass transition temperature of 30 ° C or lower is added to improve the curling prevention property of the light diffusing layer.
- a styrene-acrylic copolymer resin binder can improve the front luminance, but has the property of easily curling the light diffusing sheet.
- by covering an acrylic resin binder with a glass transition temperature of 30 ° C or less it is possible to improve the anti-curl property without lowering the front brightness improved by the styrene-acrylic copolymer resin binder. can do.
- the glass transition temperature of the acrylic resin binder is more preferably 20 ° C or lower.
- Examples of the acrylic resin resin having a glass transition temperature of 30 ° C or lower include the same monomers as the acrylic monomer of the styrene-acrylic copolymer resin described above.
- the glass transition temperature can be adjusted to 30 ° C or lower by appropriately changing the ratio of the monomer.
- Examples of commercially available acrylic resins having a glass transition temperature of 30 ° C or lower include, for example, the product name Ataridick A811 (Tg: 19 ° C) of Dainippon Ink and Co., Ltd., and the product name Ataridick 49-394IM. (Tg: 16 ° C), trade name Atari Dick 52-614 (Tg: 16 ° C), trade name Atari Dick 48-261 (Tg: 30 ° C), and the like.
- the weight ratio of the styrene-acrylic copolymer resin binder and the acrylic resin binder having a glass transition temperature of 30 ° C or lower in the light diffusing layer may be in the range of 1: 4 to 4: 1. Preferably, the range is 1: 3 to 3: 1.
- the light diffusing layer may contain other resin binder.
- the total ratio of the fat binder is preferably 60% or more, more preferably 70% or more, based on the total fat binder of the light diffusing layer. By setting it in such a range, the front luminance and curl prevention property of the light diffusing sheet can be improved.
- resin binders curing agents such as isocyanate compounds and melamine compounds can be used.
- the thickness of the light diffusing layer is not particularly limited, but is usually about 8 to 50 ⁇ m, and is preferably determined in consideration of the thickness of the support. Specifically, when the thickness of the support is 50 m or less, it is preferable that the thickness of the light diffusing layer is 8 ⁇ m or more and 20 ⁇ m or less, and the thickness of the support exceeds 50 m. In such a case, the thickness of the light diffusing layer is preferably 20 m or more and 35 m or less. By setting it in such a range, the balance between the front luminance and the anti-curl property can be improved. In the present invention, curling can be prevented even when the thickness of the light diffusing layer is 20 ⁇ m or more.
- the haze (JIS K7136: 2000) and the total light transmittance (JIS ⁇ 736 1-1: 1997) of the light diffusing sheet are preferably 85% or more and 90% or more of the total light transmittance. More preferably, the haze is 90 to 99% and the total light transmittance is 95% or more.
- additives such as surface active agents such as leveling agents and defoaming agents, antioxidants, and UV absorbers, and other additives, as long as the above-described performance is not impaired. Fats may be added.
- the light diffusing layer is formed by applying a coating solution obtained by dissolving a material such as the resin particles constituting the layer in a suitable solvent onto the support by a known coating method such as a bar coating method. However, it can be formed by drying.
- the light diffusive sheet of the present invention is a surface on which the light diffusive layer is formed in order to prevent adhesion with other members (light guide plate, etc.) in the device when incorporated in a backlight device or the like.
- the opposite surface is subjected to a fine matte treatment or anti-reflection treatment to improve the light transmittance. May be applied.
- a back coat layer having a thickness of about 5 ⁇ m or less may be provided on the surface of the support opposite to the light diffusing layer.
- the back coat layer is provided to prevent adhesion with other members such as a light guide plate when the light diffusive sheet of the present invention is incorporated in a backlight device or the like.
- the ability to suppress the occurrence of curling by providing a knock coat layer In the light diffusive sheet of the present invention even if the back coat layer is thin as described above, or the back coat layer is not formed. Also, the occurrence of curling can be prevented.
- the light diffusing sheet of the present invention described above is mainly used as a part of a backlight device constituting a light source of a liquid crystal display, an electric signboard, a scanner or a copying machine.
- Examples of the knock light device include a so-called edge light type and a direct type! /.
- the edge light type backlight device includes, for example, a light guide plate in which a light source is disposed at least at one end, a light exit surface being a surface substantially orthogonal to the one end, and a light exit surface of the light guide plate. And an optical member.
- the direct type backlight device has a configuration including a light source, a light diffusing material disposed on one side of the light source, and an optical member disposed on the side of the light diffusing material different from the light source. .
- the light diffusing sheet of the present invention can be used as an optical member of such an edge light type direct under type backlight.
- a prism sheet or the like may be used in combination as the optical member.
- the direction of the light diffusing layer in the backlight device is not limited, but it is preferable that the light diffusing layer is disposed on the light emitting side.
- a light diffusing layer coating solution a having the following composition is applied to a substrate made of a polyester film with a thickness of 50 m (Lumirror T60: Toray Industries, Inc.) by the bar coating method and dried so that the thickness after drying is 10 m. Thus, a light diffusing layer was formed, and the light diffusing sheet of Example 1 was obtained.
- the addition amount of styrene-acrylic copolymer resin in light diffusing layer coating solution a of Example 1 is 120 parts, the addition amount of acrylic resin having a glass transition temperature of 30 ° C. or less is 40 parts, and an isocyanate hardened resin.
- a light diffusing sheet of Example 2 was obtained in the same manner as Example 1 except that the addition amount of the agent was changed to 34 parts.
- Example 3 42 parts of the styrene acrylic copolymer resin in the light diffusing layer coating solution a of Example 1, 42 parts, 126 parts of the acrylic resin having a glass transition temperature of 30 ° C. or less, and the isocyanate hardener A light diffusing sheet of Example 3 was obtained in the same manner as Example 1 except that the addition amount was changed to 27 parts.
- Example 5 28 parts of the styrene-acrylic copolymer resin in the light diffusing layer coating solution a of Example 1 and 140 parts of the acrylic resin having a glass transition temperature of 30 ° C. or less, an isocyanate hardener.
- a light diffusing sheet of Example 5 was obtained in the same manner as in Example 1 except that the amount of addition was changed to 26 parts.
- the polyester film of Example 1 was changed to a polyester film having a thickness of 188 ⁇ m, and the acrylic resin particles of the light diffusing layer coating solution a were changed to acrylic resin particles (polymethyl methacrylate true spherical particles, average particle size 18 ⁇ m, coefficient of variation 22%, addition amount 220 parts) and the light diffusing sheet of Example 6 was obtained in the same manner as Example 1 except that the thickness of the light diffusing layer was changed to 25 m. It was.
- Example 1 The polyester film of Example 1 was changed to a polyester film having a thickness of 25 ⁇ m, and the acrylic resin particles of the light diffusing layer coating solution a were changed to acrylic resin particles (polymethylmetatalate true spherical particles, average particle size 8 m, the coefficient of variation was changed to 18%), and a light diffusing sheet of Example 7 was obtained in the same manner as Example 1.
- Example 1 Excluding acrylic resin having a glass transition temperature of 30 ° C. or less from the light diffusing layer coating solution a in Example 1, the addition amount of styrene-acrylic copolymer resin is 156 parts, and the addition amount of isocyanate curing agent is 37.
- a light diffusing sheet of Comparative Example 1 was obtained in the same manner as in Example 1 except that the part was changed to the part.
- the styrene-acrylic copolymer resin is removed from the light diffusing layer coating solution a in Example 1, and the addition amount of 172 parts of acrylic resin having a glass transition temperature of 30 ° C. or less is 23.
- the addition amount of isocyanate curing agent is 23
- a light diffusing sheet of Comparative Example 2 was obtained in the same manner as in Example 1 except that the part was changed to the part.
- Comparative Example 2 the acrylic resin particles of the light diffusing layer coating solution a were changed to acrylic resin particles ( Comparative example 2 except that polymethylmethalate true spherical particles, average particle size 18 m, coefficient of variation 22%, addition amount 2 20 parts) and the light diffusing layer thickness was changed to 25 m Thus, a light diffusing sheet of Comparative Example 3 was obtained.
- Example 6 an acrylic resin having a glass transition temperature of 30 ° C. or less was removed from the light diffusing layer coating solution a, and the amount of styrene-acrylic copolymer resin added was 156 parts, an isocyanate hardener.
- the light diffusing sheet of Comparative Example 4 was prepared in the same manner as in Example 6 except that the amount of addition was changed to 37 parts.
- Example 6 the styrene-acrylic copolymer resin was removed from the light diffusing layer coating solution a, the amount of acrylic resin having a glass transition temperature of 30 ° C. or less was 172 parts, and the isocyanate hardened resin.
- a light diffusing sheet of Comparative Example 5 was obtained in the same manner as Example 6 except that the addition amount of the agent was changed to 23 parts.
- the curl is completely curled, and “ ⁇ ” indicates that the sheet is slightly curled so that the light diffusing layer side is recessed.
- the layer was curled violently so that the layer side was recessed, and the item was “X”.
- BE prism sheet
- the light diffusive sheets of Examples 1 to 7 were not curled or hardly caused any problem.
- the thickness of the support was 50 / z m.
- the light diffusing sheet of Example 7 was as thin as 25 ⁇ m, curling could be prevented.
- the light diffusing sheet of Example 6 was able to prevent curling despite the large particle size of the acrylic resin particles in the light diffusing layer and the large addition amount.
- the light diffusive sheets of Examples 1 to 5 and 7 are the compositions of the light diffusive layer other than the compositions of the light diffusable sheet and the resin binder of Comparative Examples 1 to 2 (average of acrylic resin particles)
- the particle diameter, the added amount of acrylic resin particles, the thickness of the light diffusing layer, etc.) are the same, but the front brightness of Comparative Examples 1 to 2 or more is present, and the force is also anti-curl. It was.
- the light diffusing sheet of Example 6 is the same as the light diffusing sheet of Comparative Examples 3 to 5 and the composition of the light diffusing layer other than the composition of the resin binder Comparative Example 3 It had a front brightness of ⁇ 5 or more and anti-curl property.
- the light diffusing layer contains three kinds of materials: acrylic resin particles, styrene acrylic copolymer resin binder, and acrylic resin binder having a glass transition temperature of 30 ° C or lower.
- This light diffusive sheet can prevent the occurrence of curling while improving the front luminance as compared with the light diffusive sheets of Comparative Examples 1 to 5 which do not contain these three kinds of materials.
- Comparative Examples 1 and 4 the resin binder strength of Examples 1 and 6 was also obtained by removing the acrylic resin binder having a glass transition temperature of 30 ° C. or less, and the occurrence of curling was observed.
- Example 2 the resin binder strength of Example 1 is also styrene-acrylic copolymer. Excluding the fat binder, it was inferior in frontal brightness compared to that in Example 1.
- Comparative Example 3 the thickness of the light diffusing layer in Comparative Example 2 is increased, and the amount of the acrylic resin particles in the light diffusing layer is increased, and the amount added is thereby increased.
- the front luminance was slightly improved, but curling occurred.
- the front luminance of the acrylic resin particles is larger than that of the acrylic resin particles even though the light diffusing layer is thick and the acrylic resin particles are large in average particle size.
- the thickness of the light diffusing layer with a small particle size and a small amount of acrylic resin particles added was thin, and the thickness was the same as or less than that of Examples 1 to 5 and 7.
- Example 5 the resin binder strength of Example 6 was also obtained by removing the styrene-acrylic copolymer resin binder, and the front luminance was inferior to that of Example 6. . Moreover, although the average particle diameter of acrylic resin particles is large, the amount of added acrylic resin particles is large, and the thickness of the light diffusing layer is thick, the front luminance is higher than the average particle size of acrylic resin particles. The thickness of the light diffusing layer having a small diameter and a small amount of added acrylic resin particles was the same as or less than that of Examples 1 to 5 and 7.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Optical Elements Other Than Lenses (AREA)
- Laminated Bodies (AREA)
Abstract
Description
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007555880A JP5270171B2 (ja) | 2006-01-24 | 2007-01-05 | 光拡散性シート |
KR1020087017619A KR101297012B1 (ko) | 2006-01-24 | 2007-01-05 | 광확산성 시트 |
US12/087,340 US8059339B2 (en) | 2006-01-24 | 2007-01-05 | Light diffusing sheet with binder of mixed acrylic and styrene-acrylic resins |
CN2007800029972A CN101370655B (zh) | 2006-01-24 | 2007-01-05 | 光扩散片 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006014807 | 2006-01-24 | ||
JP2006-014807 | 2006-01-24 |
Publications (1)
Publication Number | Publication Date |
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WO2007086245A1 true WO2007086245A1 (ja) | 2007-08-02 |
Family
ID=38309044
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/050017 WO2007086245A1 (ja) | 2006-01-24 | 2007-01-05 | 光拡散性シート |
Country Status (7)
Country | Link |
---|---|
US (1) | US8059339B2 (ja) |
JP (1) | JP5270171B2 (ja) |
KR (1) | KR101297012B1 (ja) |
CN (1) | CN101370655B (ja) |
PL (1) | PL386475A1 (ja) |
TW (1) | TWI471221B (ja) |
WO (1) | WO2007086245A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2016124279A (ja) * | 2015-01-08 | 2016-07-11 | 凸版印刷株式会社 | 転写箔、画像保持体、冊子、および、カード |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5013619B2 (ja) * | 2008-12-03 | 2012-08-29 | 協和化学工業株式会社 | 光拡散構造体 |
CN101957462A (zh) * | 2010-08-05 | 2011-01-26 | 长兴化学工业股份有限公司 | 复合光学膜 |
CN101957463B (zh) * | 2010-08-31 | 2013-05-29 | 宁波激智新材料科技有限公司 | 抗刮伤光学扩散薄膜、液晶显示装置及照明装置 |
JP5129379B2 (ja) * | 2010-09-17 | 2013-01-30 | 日東電工株式会社 | 光拡散素子 |
CN101979914A (zh) * | 2010-09-21 | 2011-02-23 | 浙江池禾科技有限公司 | 一种光学扩散薄膜及使用该光学扩散薄膜的背光源模块 |
CN104250325B (zh) * | 2013-06-28 | 2016-12-28 | 积水化成品工业株式会社 | 丙烯酸系树脂粒子、涂料组合物及光学材料 |
CN103412355B (zh) * | 2013-08-19 | 2015-06-24 | 宁波激智科技股份有限公司 | 一种提高可视角度的扩散膜片 |
CN113156559B (zh) * | 2021-03-31 | 2023-03-24 | 常宝新材料(苏州)有限公司 | 一种防止颗粒移位的扩散片及其制备方法 |
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JP2001324608A (ja) * | 2000-05-16 | 2001-11-22 | Kimoto & Co Ltd | 光拡散性シート |
JP2002243921A (ja) * | 2001-02-16 | 2002-08-28 | Fuji Photo Film Co Ltd | 光拡散フイルムの製造方法および光拡散フイルム |
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JP2005202097A (ja) * | 2004-01-15 | 2005-07-28 | Sumitomo Chemical Co Ltd | 多層光拡散板 |
PL386474A1 (pl) * | 2006-01-24 | 2009-04-14 | Kimoto Co., Ltd. | Optyczna błona i podświetlony element wytwarzany przy jej użyciu |
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US20110007494A1 (en) * | 2008-03-18 | 2011-01-13 | Masashi Takai | Optical Member And Backlight Device Using The Same |
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2007
- 2007-01-05 US US12/087,340 patent/US8059339B2/en active Active
- 2007-01-05 KR KR1020087017619A patent/KR101297012B1/ko active IP Right Grant
- 2007-01-05 JP JP2007555880A patent/JP5270171B2/ja active Active
- 2007-01-05 PL PL386475A patent/PL386475A1/pl not_active Application Discontinuation
- 2007-01-05 WO PCT/JP2007/050017 patent/WO2007086245A1/ja active Application Filing
- 2007-01-05 CN CN2007800029972A patent/CN101370655B/zh active Active
- 2007-01-23 TW TW96102527A patent/TWI471221B/zh active
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JP2001324608A (ja) * | 2000-05-16 | 2001-11-22 | Kimoto & Co Ltd | 光拡散性シート |
JP2002243921A (ja) * | 2001-02-16 | 2002-08-28 | Fuji Photo Film Co Ltd | 光拡散フイルムの製造方法および光拡散フイルム |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2016124279A (ja) * | 2015-01-08 | 2016-07-11 | 凸版印刷株式会社 | 転写箔、画像保持体、冊子、および、カード |
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US20090009872A1 (en) | 2009-01-08 |
PL386475A1 (pl) | 2009-04-14 |
TWI471221B (zh) | 2015-02-01 |
KR20080088602A (ko) | 2008-10-02 |
TW200800607A (en) | 2008-01-01 |
JP5270171B2 (ja) | 2013-08-21 |
US8059339B2 (en) | 2011-11-15 |
KR101297012B1 (ko) | 2013-08-14 |
CN101370655B (zh) | 2012-05-30 |
CN101370655A (zh) | 2009-02-18 |
JPWO2007086245A1 (ja) | 2009-06-18 |
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