WO2006051804A1 - 白色フイルムおよびそれを用いたバックライト - Google Patents
白色フイルムおよびそれを用いたバックライト Download PDFInfo
- Publication number
- WO2006051804A1 WO2006051804A1 PCT/JP2005/020510 JP2005020510W WO2006051804A1 WO 2006051804 A1 WO2006051804 A1 WO 2006051804A1 JP 2005020510 W JP2005020510 W JP 2005020510W WO 2006051804 A1 WO2006051804 A1 WO 2006051804A1
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- WO
- WIPO (PCT)
- Prior art keywords
- film
- white
- backlight
- white film
- liquid crystal
- Prior art date
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Classifications
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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
- G02B6/005—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
- G02B6/0055—Reflecting element, sheet or layer
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/26—Reflecting filters
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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
-
- 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
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
- C09K2323/03—Viewing layer characterised by chemical composition
- C09K2323/035—Ester polymer, e.g. polycarbonate, polyacrylate or polyester
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
- C09K2323/06—Substrate layer characterised by chemical composition
-
- 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
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
-
- 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
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
-
- 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
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249976—Voids specified as closed
-
- 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
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249978—Voids specified as micro
-
- 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
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249987—With nonvoid component of specified composition
-
- 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
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249987—With nonvoid component of specified composition
- Y10T428/249991—Synthetic resin or natural rubbers
-
- 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
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249987—With nonvoid component of specified composition
- Y10T428/249991—Synthetic resin or natural rubbers
- Y10T428/249992—Linear or thermoplastic
-
- 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
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31786—Of polyester [e.g., alkyd, etc.]
Definitions
- the present invention relates to a white film that reflects light such as a cold cathode tube of a backlight used in a display such as a liquid crystal display, and a backlight using the white film.
- a backlight for illuminating a liquid crystal cell is used in a liquid crystal display, and an edge light type backlight is used in one liquid crystal monitor, and a direct backlight is used in a liquid crystal television.
- a porous white film formed by bubbles is generally used (refer to the claims of JP-A-8-262208).
- JP-A-8-262208 As the reflective film for backlight, a porous white film formed by bubbles is generally used (refer to the claims of JP-A-8-262208).
- JP-A-8-262208 As the reflective film for backlight, a porous white film formed by bubbles is generally used (refer to the claims of JP-A-8-262208).
- JP-A-8-262208 As the reflective film for backlight, a porous white film formed by bubbles is generally used (refer to the claims of JP-A-8-262208).
- JP-A-8-262208 As the reflective film for backlight, a porous white film formed by bubbles is generally
- the porous white film 1 has been used by being bonded to the back plate (rear chassis) 4 made of an aluminum plate or SUS plate with heat-bonding adhesive 4.
- the white film 1 is attached to the back plate 4 with adhesive tape 6, or the reflective film is partially attached to the back plate with hooks etc.
- a new method for forming a light reflector is being studied.
- Patent Document 1 JP 2001-166295 (Claims)
- Patent Document 2 JP 2002-90515 (Claims)
- Patent Document 3 JP 2002-333511 ([0037] lines 6-9)
- the present invention assembles the front and back of the white film at the time of assembling, as described above, the deformation of undulation or the floating of the end, the film for the reflector of the backlight, and preferably the white film. Provide a white film that is less likely to happen.
- the white film of the present invention has the following constitution.
- a white film comprising a polymer film having a thermal shrinkage in the longitudinal direction of 90 ° C. and in the width direction of 0.2% or more and 0.5% or less.
- the backlight for a liquid crystal display of the present invention has the following configuration.
- the white film of the present invention does not cause problems such as undulation and edge lift even after long-term use, a backlight for a liquid crystal display using the white film can be used for a long time.
- the white film of the present invention is composed of a polymer film having a thermal shrinkage rate in the longitudinal direction of 90 ° C. and in the width direction of not less than 0.2% and not more than 0.5%.
- a film has a thin film-like form and generally refers to what is called a film, but has a thickness exceeding 500 zm and includes what is generally called a sheet.
- the polymer is an organic polymer, and the type thereof is not particularly limited, but a thermoplastic resin that can be melt-molded is more preferable.
- a thermoplastic resin that can be melt-molded is more preferable.
- polyethylene terephthalate polyethylene naphthalate, polycyclohexylenedimethylene terephthalate, etc.
- Polyolefins such as polyesters, polyethylenes, polypropylenes, polycyclohexanedimethanols, polyamides, polyurethanes, and polyethylene sulfides.
- these may be copolymers, and various additives such as heat stabilizers, antioxidants, lubricants, organic, inorganic fine particles, light-resistant agents, antistatic agents, nucleating agents, etc. May be added to such an extent that the physical properties of the film are not adversely affected.
- additives such as heat stabilizers, antioxidants, lubricants, organic, inorganic fine particles, light-resistant agents, antistatic agents, nucleating agents, etc. May be added to such an extent that the physical properties of the film are not adversely affected.
- organic polymers polyethylene terephthalate is particularly preferable, among which polyester resins having good mechanical stability and low visible light absorption are more preferable.
- the film longitudinal heat shrinkage measured at 90 ° C. means that a high-molecular film sump nore having a certain size is prepared, and the longitudinal direction (extrusion direction during production) is prepared at room temperature. Measure a certain length (L), leave it for 30 minutes in a constant temperature bath holding the sampnore at 90 ° C,
- the length of the part corresponding to the L is measured, and the length (L) and the initial value are measured.
- the heat shrinkage in the width direction of the film at 90 ° C is a value measured in the same manner as the longitudinal direction of the polymer film in the width direction of the polymer film (perpendicular to the extrusion direction during production). .
- the thermal contraction rate in the longitudinal direction and the width direction at 90 ° C is not less than 0.2% and not more than 0.5%, preferably not less than 0.1. . is 3% or less, more ⁇ this preferably f or one 0.05 to 0.25 0/0, and most preferably f or one 0.05 to 0.15. 90.
- the thermal contraction rate in the longitudinal direction or width direction of C is outside the range of 0.2% or more and 0.5% or less, deformation is observed when used as a reflective film for a backlight.
- the film has a uniform and uniform heat shrinkage rate in the longitudinal direction of the polymer film, and has a high mechanical strength even if it is thin, and the heat shrinkage rate in the width direction can be lowered in the film forming process.
- a biaxially stretched film is excellent in terms of points. Among them, a biaxially stretched film of polyethylene terephthalate is excellent as the polymer film of the present invention.
- the white color of the white film of the present invention has an average reflectance at a wavelength of 400 nm to 700 nm.
- the method for increasing the visible light reflectance is not particularly limited, but it is preferable to include bubbles inside the film.
- these white films include, but are not limited to, porous unstretched or biaxially stretched polypropylene films, porous unstretched or stretched polyethylene terephthalate films. . These production methods and the like are described in detail in JP-A-8-262208, [0034 ⁇ [0057], JP-A-2002-90515, [0007]-[0018], JP-A-2002-138150, [0008]-[0034], and the like. Is disclosed. Among them, the porous white biaxially stretched polyethylene terephthalate film disclosed in JP-A-2002-90515 is particularly preferable as the polymer film of the present invention for the reasons described above.
- the white film may be deteriorated by light emitted from a lamp such as a cold-cathode tube during use, particularly ultraviolet rays (for example, optical deterioration such as yellowing or degradation deterioration that lowers the molecular weight). It is preferable to provide an ultraviolet absorbing layer on at least one side of the molecular film.
- the ultraviolet absorbing layer is not particularly limited, but inorganic ultraviolet absorbers such as TiO and ZnO , A resin containing an organic ultraviolet absorber such as benzotriazole or benzophenone, a resin obtained by copolymerizing a benzotriazole-based or benzophenone-based reactive monomer, and a hindered amine-based reactive monomer.
- organic ultraviolet absorbing resin containing a copolymerized resin or the like or a resin containing an inorganic ultraviolet absorbing agent and an organic ultraviolet absorbing agent.
- organic UV-absorbing resins including resins that are copolymerized with benzotriazole-based and benzophenone-based reactive monomers, as well as resins that are copolymerized with hindered amine-based reactive monomers, have a thin layer and have an ultraviolet absorbing effect. Higher than preferred.
- the white film is laminated with a UV absorbing layer that is white on both sides, it is difficult to distinguish between the front and back.
- the case of setting to the) side is considered.
- the printing layer is not particularly limited, and it is preferable to apply (print) a normal dye or a resin (ink) containing a pigment. It is more preferable to provide a printing layer partially rather than to cover the entire surface of the film, since the adhesion increases when the white film and the back plate (rear chassis) are attached to each other with an adhesive tape or the like.
- Fig. 1 shows a schematic cross-sectional view of a white film of an example of the present invention in which an ultraviolet absorbing layer and a print layer are provided on a white film
- Fig. 2 shows a schematic plan view of the white film as viewed from above.
- the UV absorbing layer 2 is provided on the top surface (side surface of the lamp (not shown)) of the white film 1 by coating, and the bottom surface (side surface of the back plate (not shown)) Is provided with a printing layer 3.
- the printing layer 3 is partially printed by forming a pattern on one surface of the white film.
- the method of setting the thermal shrinkage rate of the polymer film of the present invention at 90 ° C in the film longitudinal direction and the width direction to -0.2% or more and 0.5% or less is not particularly limited.
- the heat shrinkage rate in the longitudinal direction and width direction of 90 ° C is targeted by heat treatment mainly in the molding process by controlling the heat treatment temperature, the film tension in the heat treatment zone, and the running speed of the film.
- the value can be It is also possible to pass the polymer film through the heat oven of the coating apparatus and heat-treat by adjusting mainly the heat oven temperature, the film tension in the heat oven, and the film traveling speed. It is also possible to set the heat shrinkage rate in the film longitudinal direction and width direction to the target values.
- the drying and curing process in a thermal oven is performed mainly in the temperature and in the thermal oven.
- heat treatment can be performed at the same time that the coating layer or printing layer is provided, and the heat shrinkage rate in the longitudinal direction and width direction of 90 ° C is the target value. This is a better method because it can be
- the white film of the present invention By using the white film of the present invention, even if the white film is bonded to the back plate (rear chassis) by a method that does not have a strong fixing force such as adhesive tape, it is fused to the conventional aluminum plate during use.
- a high-quality backlight can be produced in which the white film does not wave and the edges do not peel off, similar to those bonded with an adhesive.
- the strength of the backlight area is large S, and when using the white film of the present invention, it can be easily bonded to a large area, and even in a large area, it has good quality that does not wavy or peel off during use. Can produce a simple backlight.
- the size of the liquid crystal display (rectangular diagonal length) is 76.2 cm (30 inches) or more, preferably 88.9 cm (35 inches) or more, more preferably 101.6 cm (40 inches) or more, Most preferably it is 127 cm (50 inches) or more.
- the straight line connecting the two gauge points is flat on the long side.
- Film longitudinal heat shrinkage (%) ⁇ (L — L) / L ⁇ X 100
- the measurement is performed in the same manner as the longitudinal heat shrinkage measurement method except that the width direction of the polymer film is the long side and the long side is the short side.
- a white film is applied to the rear chassis of the LCD TV backlight unit with a display size of 60.96cm (24 inches) and 132.08cm (52 inches) with a double-sided adhesive tape to form a reflector, and the backlight unit is incorporated into an LCD TV. Turn on the power continuously for 3 months, remove the backlight unit from the LCD TV after continuous use, and visually observe the state of the white film on the reflector. The observation result is judged by the following A, B, C, and if it is A, it is acceptable.
- a white film made of porous biaxially stretched polyethylene terephthalate with a thickness of 188 / im was coated with 5 ⁇ m of resin containing an organic UV absorber on one side, and UV resistant white.
- a film was manufactured ("LUMIRROR” E60V manufactured by Toray Industries, Inc.). The UV-resistant white film is passed through a coating apparatus and heated at an oven temperature of 160. In C, the film tension in the heat oven was 49 NZm, and the film was heat treated at a film running speed of 1 OmZmin.
- a polka dot pattern having a diameter of 10 mm was printed on the surface opposite to the surface provided with the ultraviolet absorbing layer of the heat-treated film using a light blue ink at intervals of 50 mm vertically and horizontally, and printed on a printing machine.
- Example 3 A white Finolem was obtained under the same conditions as in Example 1 except that the film tension in the heat oven was changed to 68.6 N / m. [0029] ⁇ Example 3>
- a white film was obtained under the same conditions as in Example 1 except that the film tension in the heat oven was 98 N / m.
- a coating device on one side of a white film made of porous biaxially stretched polyethylene terephthalate with a thickness of 250 ⁇ m ("Lumirror” E6SL manufactured by Toray Industries, Inc.) Apply the film to a thickness of 5 ⁇ m, and set the film tension in the hot air oven (90 ° C oven, 150 ° C oven, 120 ° C oven sequentially) to 147 N / m, dried and scraped while controlling the film running speed to 20mZmin.
- the hot air oven 90 ° C oven, 150 ° C oven, 120 ° C oven sequentially
- a circle having a diameter of 5 mm was printed on the surface opposite to the surface on which the ultraviolet absorbing layer was provided, using a blue ink at 20 mm intervals in the vertical and horizontal directions, and printed on a printing machine to produce a white Finolem.
- a coating device on one side of a white film made of porous biaxially stretched polyethylene terephthalate with a thickness of 250 ⁇ m ("Lumirror” E6SL manufactured by Toray Industries, Inc.) The film was applied to a thickness of 5 ⁇ m, and the film tension in the hot air oven (temperature in the oven: controlled from 90 to 150 to 120 in the oven) was 147 N / m, film speed was controlled to 20 m / min and dried and scraped.
- the film was run under the above oven conditions, and heat treatment was performed.
- a circular film having a diameter of 5 mm was printed on a surface opposite to the surface provided with the ultraviolet absorbing layer of the film using a blue ink at 20 mm intervals in the vertical and horizontal directions to produce a white film.
- Example 2 Except that the film tension in the heat oven was 29.4 N / m, the same conditions as in Example 1 were used. A white Finolem was created.
- a white vinylome was prepared under the same conditions as in Example 1 except that the film tension in the heat oven was 166.6 N / m.
- the polka-dot printed white film of Examples:! To 3 and Comparative Examples 2 and 3 can be applied to the adhesive tape. It was possible to paste them together in a shorter time than the need to carefully identify the front and back sides.
- Table 1 shows the evaluation results.
- the white films of Examples 1 to 3 did not change significantly in the shape before and after the evaluation, but the white film of Comparative Example 1 was a wave and the part of the edge part was peeled off from the adhesive tape.
- the white films of Comparative Examples 2 and 3 had a wave throughout. Further, the white film of Comparative Example 1 did not have an ultraviolet absorbing layer, so the surface was faintly yellowish due to ultraviolet rays.
- Example 1 49. 0 0. 0 One 0. 1 Yes Yes AB
- Example 2 68. 6 0. 2 0. 0 Yes Yes AB
- Example 3 98. 0 0. 5 0. 0 Yes Yes AB
- Example 4 1 47. 0 0. 1 5 1 0. 05 Yes Yes AA
- Example 5 1 47. 0 0. 08 0. 01 Yes Yes AA Comparative Example 1 0. 7 0. 2 CC Comparative Example 2 29. 4 -0.3 0. 3 Yes Yes BC Comparative Example 3 1 66. 6 0. 6 0. 2 Yes Yes BC
- the white film of the present invention has less undulations and less lifted edges, it can be used as a reflective film for backlights for liquid crystal displays having particularly large sizes. Further, since the backlight for liquid crystal displays of the present invention can be used for a long period of time, it can be used for liquid crystal displays of various electric / electronic devices.
- FIG. 1 is a schematic sectional view of a white film of the present invention.
- FIG. 2 is a schematic plan view seen from the printed layer side of the present invention.
- FIG. 3 is a schematic cross-sectional view of a backlight reflector produced by a new forming method.
- FIG. 4 is a schematic cross-sectional view of a backlight reflector produced by a conventional forming method.
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- Laminated Bodies (AREA)
- Liquid Crystal (AREA)
- Optical Elements Other Than Lenses (AREA)
- Planar Illumination Modules (AREA)
- Optical Filters (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006544908A JPWO2006051804A1 (ja) | 2004-11-12 | 2005-11-09 | 白色フイルムおよびそれを用いたバックライト |
US11/665,078 US8067082B2 (en) | 2004-11-12 | 2005-11-09 | White film and backlight using same |
CN2005800384636A CN101057163B (zh) | 2004-11-12 | 2005-11-09 | 白色薄膜和使用该白色薄膜的背光源 |
KR1020137032314A KR101527777B1 (ko) | 2004-11-12 | 2005-11-09 | 백색필름 및 이를 사용한 백라이트 |
KR1020127022502A KR101400067B1 (ko) | 2004-11-12 | 2005-11-09 | 백색필름 및 이를 사용한 백라이트 |
EP19191546.1A EP3584612A1 (en) | 2004-11-12 | 2005-11-09 | White film and backlight using same |
EP05806176.3A EP1811320A4 (en) | 2004-11-12 | 2005-11-09 | WHITE FILM AND BACKLIGHT USING THE SAME |
US13/272,355 US8557370B2 (en) | 2004-11-12 | 2011-10-13 | White film and backlight using same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004328719 | 2004-11-12 | ||
JP2004-328719 | 2004-11-12 |
Related Child Applications (2)
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US11/665,078 A-371-Of-International US8067082B2 (en) | 2004-11-12 | 2005-11-09 | White film and backlight using same |
US13/272,355 Division US8557370B2 (en) | 2004-11-12 | 2011-10-13 | White film and backlight using same |
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WO2006051804A1 true WO2006051804A1 (ja) | 2006-05-18 |
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PCT/JP2005/020510 WO2006051804A1 (ja) | 2004-11-12 | 2005-11-09 | 白色フイルムおよびそれを用いたバックライト |
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US (2) | US8067082B2 (ja) |
EP (2) | EP3584612A1 (ja) |
JP (6) | JPWO2006051804A1 (ja) |
KR (3) | KR101527777B1 (ja) |
CN (1) | CN101057163B (ja) |
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Cited By (3)
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JP2009129705A (ja) * | 2007-11-22 | 2009-06-11 | Sony Corp | バックライト装置及び液晶表示装置 |
JP2011018682A (ja) * | 2009-07-07 | 2011-01-27 | Konica Minolta Medical & Graphic Inc | 有機圧電材料、超音波振動子、その製造方法、超音波探触子、及び超音波医用画像診断装置 |
JP2017173834A (ja) * | 2004-11-12 | 2017-09-28 | 東レ株式会社 | バックライトの反射板用白色フィルムおよびそれを用いたバックライト |
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JP2009076405A (ja) * | 2007-09-21 | 2009-04-09 | Sony Corp | 光学素子包装体、バックライトおよび液晶表示装置 |
JP5440166B2 (ja) * | 2007-12-11 | 2014-03-12 | 東レ株式会社 | 積層フィルム |
KR101296660B1 (ko) * | 2009-02-11 | 2013-08-14 | 엘지디스플레이 주식회사 | 액정표시장치 및 그 제조방법 |
KR20110051587A (ko) * | 2009-11-10 | 2011-05-18 | 삼성전자주식회사 | 광학 플레이트 및 그 제조 방법 |
ES2537227T3 (es) | 2010-10-01 | 2015-06-03 | Applied Medical Resources Corporation | Instrumento electro-quirúrgico con mordazas y con un electrodo |
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- 2005-11-09 KR KR1020137032314A patent/KR101527777B1/ko active IP Right Grant
- 2005-11-09 KR KR1020077010140A patent/KR20070083962A/ko active Search and Examination
- 2005-11-09 EP EP19191546.1A patent/EP3584612A1/en not_active Withdrawn
- 2005-11-09 JP JP2006544908A patent/JPWO2006051804A1/ja active Pending
- 2005-11-09 KR KR1020127022502A patent/KR101400067B1/ko active IP Right Grant
- 2005-11-09 CN CN2005800384636A patent/CN101057163B/zh not_active Ceased
- 2005-11-09 US US11/665,078 patent/US8067082B2/en active Active
- 2005-11-09 EP EP05806176.3A patent/EP1811320A4/en not_active Ceased
- 2005-11-11 TW TW94139544A patent/TWI383012B/zh active
-
2011
- 2011-09-21 JP JP2011205689A patent/JP2012014193A/ja active Pending
- 2011-10-13 US US13/272,355 patent/US8557370B2/en active Active
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- 2013-07-12 JP JP2013146204A patent/JP6120321B2/ja active Active
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- 2015-12-07 JP JP2015238188A patent/JP6194944B2/ja active Active
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- 2017-04-21 JP JP2017084289A patent/JP6477774B2/ja active Active
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Cited By (3)
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---|---|---|---|---|
JP2017173834A (ja) * | 2004-11-12 | 2017-09-28 | 東レ株式会社 | バックライトの反射板用白色フィルムおよびそれを用いたバックライト |
JP2009129705A (ja) * | 2007-11-22 | 2009-06-11 | Sony Corp | バックライト装置及び液晶表示装置 |
JP2011018682A (ja) * | 2009-07-07 | 2011-01-27 | Konica Minolta Medical & Graphic Inc | 有機圧電材料、超音波振動子、その製造方法、超音波探触子、及び超音波医用画像診断装置 |
Also Published As
Publication number | Publication date |
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US20090027590A1 (en) | 2009-01-29 |
JP2016048397A (ja) | 2016-04-07 |
KR101527777B1 (ko) | 2015-06-12 |
JP2017173834A (ja) | 2017-09-28 |
JP2012014193A (ja) | 2012-01-19 |
KR101400067B1 (ko) | 2014-05-28 |
KR20140015526A (ko) | 2014-02-06 |
JP2019040195A (ja) | 2019-03-14 |
JP6120321B2 (ja) | 2017-04-26 |
KR20120102168A (ko) | 2012-09-17 |
JP6194944B2 (ja) | 2017-09-13 |
US20120033154A1 (en) | 2012-02-09 |
JP6477774B2 (ja) | 2019-03-06 |
EP3584612A1 (en) | 2019-12-25 |
EP1811320A1 (en) | 2007-07-25 |
TW200624478A (en) | 2006-07-16 |
TWI383012B (zh) | 2013-01-21 |
CN101057163B (zh) | 2010-06-16 |
CN101057163A (zh) | 2007-10-17 |
EP1811320A4 (en) | 2014-12-17 |
US8067082B2 (en) | 2011-11-29 |
JP2013235286A (ja) | 2013-11-21 |
JPWO2006051804A1 (ja) | 2008-05-29 |
US8557370B2 (en) | 2013-10-15 |
KR20070083962A (ko) | 2007-08-24 |
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