WO2005066663A1 - 光拡散フィルム、面光源装置及び液晶表示装置 - Google Patents
光拡散フィルム、面光源装置及び液晶表示装置 Download PDFInfo
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- WO2005066663A1 WO2005066663A1 PCT/JP2004/019620 JP2004019620W WO2005066663A1 WO 2005066663 A1 WO2005066663 A1 WO 2005066663A1 JP 2004019620 W JP2004019620 W JP 2004019620W WO 2005066663 A1 WO2005066663 A1 WO 2005066663A1
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- light
- light diffusion
- light source
- ultraviolet absorber
- source device
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Classifications
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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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—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
- G02B5/0221—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 the surface having an irregular structure
-
- 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
- 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
-
- 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
- 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
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
Definitions
- Light diffusion film, surface light source device and liquid crystal display device are Light diffusion film, surface light source device and liquid crystal display device
- the present invention relates to a light diffusion film having an ultraviolet absorbing function, and more particularly, to a light diffusion film used for a surface light source device such as a liquid crystal display, a surface light source device using the same, and the surface light source device.
- the present invention relates to a liquid crystal display device used.
- Liquid crystal display devices such as personal computers, word processors, and liquid crystal televisions are illuminated from behind by surface light sources (also referred to as backlights) because liquid crystals themselves do not emit light.
- the surface light source device includes an edge light type using a light guide plate and a direct type type in which fluorescent tubes are arranged in order to uniformly illuminate the entire liquid crystal screen.
- edge light method light with a linear light source is incident from the side end surface of the light guide plate, and is converted into surface light emitted by the light guide plate surface force by a light scattering pattern on the back surface of the light guide plate.
- a plurality of linear light sources are arranged immediately below a liquid crystal display device to emit light in a planar manner.
- a surface light source device in order to emit the light from the light source, which is incident, from the light exit surface, further diffuse, condense the light, and make the luminance of the irradiation surface uniform.
- a light diffusion film, a lens film, a protective light diffusion film, and the like are provided.
- liquid crystal display devices have been used for televisions (TV) and the like because of their large screen areas.
- TV televisions
- conventional small screens the brightness of the displayed image is a big problem, but TV is a relatively bright room and requires a wide viewing angle and high brightness to be viewed by many people.
- a light source used for a surface light source device of a liquid crystal display device for TV a direct type using a large output and a plurality of fluorescent lamps is mainly used.
- the power of this light source increases, so does the emission of unwanted ultraviolet radiation as well as the emission of visible light.
- the ultraviolet light degrades optical members such as a light diffusion film, a lens film, and a polarizing film in the surface light source device, causing the optical members to be colored or cracked.
- measures to add an ultraviolet absorber to a lens film, a polarizing film and the like can be considered.
- an optical film such as a polarizing film or a lens film has a desired polarization. It is necessary to obtain optical parameters such as characteristics and refractive index. For this reason, adding impurities such as ultraviolet absorbers is problematic and difficult.
- Patent Document 2 relates to a mat film for preventing adhesion to a polarization separation sheet, which was filed by the present inventors, and has a light diffusion for a backlight for a large TV having a strong light source directly below the present application.
- the film has not been described or suggested.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2001-21706
- Patent Document 2 JP 2001-42108 A
- Patent Document 3 JP-A-2003-50306
- the present invention has been made to solve such a problem.
- the purpose is to use a surface light source device, which has high brightness but also has high output of ultraviolet light together with visible light, in a liquid crystal display device for TV etc. Brightness is high, optical characteristics can be maintained over a long period of time, excellent display images, high environmental reliability, and it does not affect the refractive index (light collecting property) of the lens film and the polarization characteristics of the polarizing film.
- Another object of the present invention is to provide a light diffusing film, a surface light source device, and a liquid crystal display device which can realize a liquid crystal display device in which bleeding of an ultraviolet absorbent hardly occurs.
- the present invention comprises a transparent substrate and a light diffusion layer provided directly or via another layer on at least one surface of the transparent substrate, wherein the light diffusion layer is at least an ionizing radiation-curable resin.
- purple A light diffusing film comprising an external light absorbing agent and having a fine uneven shape exhibiting a light diffusing function on a surface of the light diffusing layer.
- each light diffusion layer contains at least an ionizing radiation-curable resin and an ultraviolet absorber, and a light diffusion function is provided on the surface of each light diffusion layer. It is a light diffusion film characterized by providing a fine uneven shape exhibiting the following.
- the present invention is the light diffusion film, wherein the light diffusion layer is provided on at least one surface of the transparent substrate via a primer layer.
- the present invention is characterized in that the ultraviolet absorber is selected from one or more of a benzotriazole-based ultraviolet absorber, a salicylate-based ultraviolet absorber, and a benzophenone-based ultraviolet absorber. Is a light diffusion film.
- the present invention is the light diffusion film, wherein the ultraviolet absorber further comprises a hindered amine radical scavenger.
- the present invention is applied to a 21-inch (21-inch) surface light source device having a direct-type surface light source unit including 12 light sources consisting of 12 cold cathode ray tube tubes arranged in parallel.
- a *, b * color system based on JIS-Z-8729 at the center of the screen of the surface light source device measured 5,000 hours after the light source was turned on is less than 2.0. It is a light diffusion film characterized by the following.
- the present invention provides a direct-type surface light source unit including a plurality of light sources arranged in parallel, a reflector surrounding the light sources, having an opening on the light emission side, and having a light reflection surface formed on an inner surface.
- a light diffusion film disposed on the light exit side of the direct-type surface light source section, and a lens film disposed on the light exit side of the light diffusion film, wherein the light diffusion film comprises a transparent base material and at least a transparent base material.
- a light diffusion layer provided directly or via another layer on one surface, the light diffusion layer containing at least an ionizing radiation-curable resin and an ultraviolet absorber, and having a light diffusion layer on the surface of the light diffusion layer.
- This is a surface light source device provided with a fine uneven shape exhibiting a function.
- each light diffusion layer contains at least an ionizing radiation-curable resin and an ultraviolet absorber, and a light diffusion function is provided on the surface of each light diffusion layer.
- This is a surface light source device characterized by providing fine irregularities that exhibit the following.
- the ultraviolet absorbent may be a benzotriazole-based ultraviolet absorbent, a salicylate-based A surface light source device selected from an ultraviolet absorber and a benzophenone-based ultraviolet absorber.
- the present invention is the surface light source device, wherein the ultraviolet absorber further contains a hindered amine-based radical scavenger.
- the present invention is the surface light source device, wherein the light diffusion layer is provided on at least one surface of the transparent substrate via a primer layer.
- the direct-type surface light source unit includes 12 cold cathode ray tubes arranged in parallel as a light source, the surface light source device has a 21-inch (21-inch) shape, and a light-diffusing film.
- the L *, a *, b * color system based on JIS-Z-8729 at the center of the screen of the surface light source device was measured immediately after the wire was inserted into the light source device and after 5000 hours of lighting of each light source.
- the present invention relates to a liquid crystal display device including a surface light source device and a liquid crystal display panel arranged on the light exit side of the surface light source device, wherein the surface light source device includes a plurality of light sources arranged in parallel, And a light-diffusing film disposed on the light-emitting side of the direct-type surface light source section, including a reflector surrounding the light source and having an opening on the light-emitting side and a light reflection surface formed on the inner surface. And a lens film disposed on the light-emitting side of the light-diffusing film.
- the light-diffusing film comprises: a transparent base; and a light-diffusion provided directly or through another layer on at least one surface of the transparent base.
- a light diffusion layer comprising at least an ionizing radiation-curable resin and an ultraviolet absorber, and having a fine uneven shape exhibiting a light diffusion function on the surface of the light diffusion layer. It is.
- a light diffusion film which is hardly colored, has high transparency, can maintain optical characteristics for a long period of time, has excellent display images, and has high environmental reliability.
- a surface light source device which is hardly colored and has high transparency and can maintain optical characteristics for a long period of time even on a large screen such as a direct type TV having a plurality of light sources.
- a liquid crystal display device for a high-brightness TV or the like which can be viewed by a large number of people in a relatively bright room.
- FIG. 1 is a diagram showing a surface light source device and a liquid crystal display device according to the present invention.
- FIG. 2 is a cross-sectional view of a light diffusion film according to the present invention.
- FIG. 3 is a view showing a manufacturing process of the light diffusion film according to the present invention.
- FIG. 4 is a view showing an apparatus for manufacturing a light diffusion film according to the present invention.
- FIG. 1 shows a surface light source device and a liquid crystal display device according to the present invention
- FIG. 2 shows a light diffusion film according to the present invention.
- the liquid crystal display device 60 includes a surface light source device 50 and a liquid crystal display panel 30 arranged on the light emission side of the surface light source device 50.
- the surface light source device 50 includes a plurality of light sources 21 arranged in parallel with the power of a cold cathode ray tube, a lower side (opposite to the liquid crystal display panel) and a side surface of the light source 21 and a light emitting side (liquid crystal display panel side). ), A reflection plate 27 having an opening 27b, a light diffusion film 1 disposed on the light exit side of the reflection plate 27 (opening 27b side), and a lens film 40 disposed on the light exit side of the light diffusion film 1. And a protective light diffusion film 1B disposed as necessary on the light exit side of the lens film 40.
- the plurality of light sources 21 and the reflector 27 constitute a direct-type surface light source section 21a.
- a light reflection surface 27a is formed on the inner surface of the reflection plate 27 of the direct-type surface light source portion 21a, and the light reflection surface 27a returns light from the light source 21 to the lower side and the side surface to the opening 27b side. ing. Then, all of the light from the light source 21 is directed toward the liquid crystal display panel 30 from the opening 27b of the reflection plate 27 and emitted.
- the liquid crystal display panel 30 is provided on the light emission side of the surface light source device 50, and includes a lower substrate 35, an upper substrate 33, and a liquid crystal layer 31 sandwiched between the lower substrate 35 and the upper substrate 33. I have.
- the surface light source device 50 is a backlight that illuminates the liquid crystal display panel 30 from the back.
- the light diffusing film 1 of the present invention has a transparent substrate 11 and a light diffusing layer provided on both surfaces of the transparent substrate 11 via a primer layer 13.
- the light diffusion layer 15 has an ionizing radiation-curable resin composition and an ultraviolet absorber contained in the ionizing radiation-curable resin composition, and is cured by irradiation with ionizing radiation. has been cured.
- the light diffusion layers 15 are provided on both surfaces of the transparent substrate 11, but the light diffusion layers 15 may be provided on only one surface of the transparent substrate 11.
- the thickness of the light diffusion layers 15 is increased to enhance the ultraviolet absorption performance as compared with the case where the light diffusion layers 15 are provided only on one side.
- warping and tarling due to a difference in swelling / shrinkage ratio between the transparent base material 11 and the light diffusion layer 15 are unlikely to occur.
- the primer layer 13 when the primer layer 13 is interposed between the transparent base material 11 and the light diffusion layer 15, when the base material 11 and the light diffusion layer 15 are directly bonded with sufficient strength, the primer layer 13 can be omitted.
- the light diffusing film 1 of the present invention does not substantially contain a light diffusing agent, and utilizes the light diffusing action due to the uneven shape of the surface of the light diffusing layer 15. Therefore, even if an ultraviolet absorber is added to the light diffusion layer, the light diffusion performance is not affected.
- transparent substrate As the material of the transparent substrate 11, various materials such as transparent resin can be used as long as they have the conditions of use, transparency, insulation, heat resistance, mechanical strength, and the like that can withstand production. it can.
- the transparent resin include polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, terephthalic acid / isophthalic acid / ethylene glycol copolymer, and terephthalic acid / cyclohexanedimethanol / ethylene glycol copolymer
- Polyester resin such as nylon 6, polyamide resin such as nylon 6, polyolefin resin such as polypropylene and polymethylpentene, acrylic resin such as polymethyl (meth) acrylate, ABS resin, polystyrene, styrene Sheets, films, plates, and the like made of resins such as styrene resins such as acrylonitrile copolymer, cellulose resins such as triacetyl cellulose, im
- the transparent base material 11 made of the transparent resin may be a copolymer resin containing these resins as a main component, a mixture (including alloys), or a laminate of a plurality of layers. good.
- the transparent substrate may be a stretched film or an unstretched film, but is preferably a film stretched in a uniaxial or biaxial direction for the purpose of improving strength.
- the thickness of the transparent substrate is usually about 12-IOO / zm, but 50-700 ⁇ m is preferable, and 100-500 ⁇ m is optimal. It is. At thicknesses less than this, mechanical Insufficient strength causes warpage, sagging, breakage, etc. Above this, excessive performance results in waste of cost.
- polyester resin films such as polyethylene terephthalate and polyethylene naphthalate are preferably used because they are transparent, have good heat resistance and are inexpensive, and are not easily broken, and are lightweight and easy to mold.
- Biaxially oriented polyethylene terephthalate is optimal. The higher the transparency, the better, but preferably the visible light transmittance is 80% or more.
- the surface of the transparent base material may be subjected to an easy-adhesion treatment prior to the formation of the light diffusion layer.
- Typical examples of the easy-adhesion treatment include application of a primer (also called an anchor coat, an adhesion promoter, and an easy-adhesive).
- a primer also called an anchor coat, an adhesion promoter, and an easy-adhesive
- corona discharge treatment, plasma treatment, ozone treatment, flame treatment, pre-heat treatment, removal Dust treatment, vapor deposition treatment, alkali treatment and the like can be mentioned.
- an additive such as a filler, a plasticizer, and an antistatic agent may be added to the transparent base material.
- an ultraviolet absorber can be added to the transparent substrate.
- FIG. 2 shows an example in which primer layers 13 are provided on both surfaces of a transparent base film 11.
- the light diffusion layer 15 has a fine unevenness 17 on the surface and exerts an appropriate light diffusion property, and the light diffusion layer 15 is made of a known ionizing radiation-curable resin composition. It consists of a cured product obtained by dissolving or dispersing an ultraviolet absorber in a product and irradiating it with ionizing radiation. Basically, it does not include light diffusing agents such as silica particles and resin beads.
- (meth) acrylates of polyfunctional compounds such as polyhydric alcohols (hereinafter referred to as atalylate and meta-atalylate in this specification)
- a strong known substance such as a monomer such as (meth) acrylate, or an oligomer (or a prepolymer) or a photopolymerization initiator or a photosensitizer can be applied.
- An ultraviolet absorber is dissolved or dispersed in the ionizing radiation-curable resin composition, and is irradiated with ionizing radiation to cure while shaping the fine irregularities 17.
- At least one of the above monomers and oligomers (or prepolymers) has three or more functional groups. It is preferable to include the above-mentioned components so as to form a cured product in which molecules are cross-linked three-dimensionally. By doing so, it is possible to prevent bleeding (bleeding) of the ultraviolet absorber over time, and to improve the scratch resistance of the light diffusion layer.
- trifunctional or higher functional monomer examples include trimethylolpropane tri (meth) atalylate, pentaerythritol hexa (meth) acrylate, dipentaerythritol hexa (meth) atalylate, and pentaerythritol penta (meth) Athalylate, dipentaerythritol penta (meth) atalylate, dipentaerythritol hexa (meth) atalylate, etc.
- trifunctional or higher functional prepolymer trifunctional or higher functional polyester (meth) acrylate, urethane (meth) acrylate And epoxy (meth) acrylate.
- Examples of the monomer such as monofunctional monomer include ethyl (meth) acrylate, ethyl hexyl (meth) acrylate, styrene, and N-vinylpyrrolidone.
- Examples of the functional monomer include tripropylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, and the like.
- Examples of the photopolymerization initiator include acetophenones and benzophenones, and examples of the photosensitizer include n-butylamine, triethylamine, and tri-n-butylphosphine, which are used as a mixture.
- the light diffusion layer 15 is formed using the above-mentioned materials.
- the above-mentioned ionizing radiation-curable resin composition contains an ultraviolet absorber and is cured, and is provided with ultraviolet resistance due to the ultraviolet absorption of the ultraviolet absorber. Due to the ultraviolet light resistance, even if it is irradiated with ultraviolet light, it is highly transparent and can maintain optical properties for a long period of time, is excellent in display image, and has high environmental reliability.
- an ultraviolet absorber when added to an ionizing radiation-curable resin having a polymer structure in which monomers, prepolymers, and the like are three-dimensionally crosslinked, the ultraviolet absorber is added by the three-dimensional crosslinked structure of the polymer. A good product without bleed can be obtained.
- the hue change due to coloring is represented by hue b * (b star value) in the L *, a *, b * color system based on JIS-Z-8729.
- the light-diffusing film of the present invention was incorporated into a 21-inch (21-inch diagonal line) surface light source device having a light source in which 12 cold cathode ray tubes were arranged in parallel, and measured immediately after incorporation and 5000 hours after lighting.
- the hue change (b *) at the center of the screen of the surface light source device is 2.0 Or less, preferably 1.0 or less. Exceeding this range will greatly affect the transparency and color purity. When the hue change (b *) is 2.0 or less, the effect is small. When the hue change (b *) is 1.0 or less, no practical hue change is observed.
- the correlation of b * with an ultraviolet absorbent will be described in detail in Examples.
- the ultraviolet absorber is not particularly limited, and may be a benzotriazole-based ultraviolet absorber, a salicylate-based ultraviolet absorber, a benzophenone-based ultraviolet absorber, a cyanoacrylate-based ultraviolet absorber, A triaryltriazine-based ultraviolet absorber can be used.
- the use of the ultraviolet absorber has an effect of preventing coloring of the light diffusion layer.
- a hindered amine radical scavenger is added in addition to the ultraviolet absorber. Note that the hindered amine radical scavenger has no substantial ultraviolet ray absorbing effect, but has an effect of inhibiting a reaction in which the resin to which it is added is deteriorated by ultraviolet rays.
- the light diffusion film 15 is used to prevent the deterioration of the ultraviolet light of the light diffusion film 1 itself, and the light diffusion layer 15 is used to absorb the ultraviolet light in order to prevent the deterioration of the other members placed thereon. Additives are required.
- hindered amine radical scavenger examples include, for example, 2,2,6,6-tetramethyl-4 piberidyl stearate, 1,2,2,6,6-pentamethyl-4-piberidyl stearate, 2, 2,6,6-tetramethyl-4-piperidyl benzoate, bis (2,2,6,6-tetramethinole 4-piperidyl) sebacate, bis (1,2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis ( 1 Otatoxy 2,2,6,6-tetramethyl-4-piperidyl) sebacate, tetrakis (2,2,6,6-tetramethyl-4-piperidyl) -1,2,3,4 butanetetracarboxylate, tetrakis ( 1,2,2,6,6-pentamethyl-4-piperidyl) -1,2,3,4-butane tetracarboxylate, bis (2,2,6,6-tetramethyl-4-piperidyl)
- Examples of the benzotriazole-based ultraviolet absorber include 2- (2'-hydroxy-5'-methylphenyl) benzotriazole, 2- (2'-hydroxy-3 ', 5'-di-tert-butylphenyl). -5) benzobenzotriazole, 2- (2, -hydroxy-3, -tert-butyl-5,1-methylphenyl) -5-benzobenzotriazole, 2- (2, -hydroxy-5, -tert-octylphen) -Le) benzotriazole, 2- (2-hydroxy-3,5, dicumylphenol) benzotriazole, 2,2-methylenebis (4 tert-octyl-6- (benzotriazolyl) phenol), 2- (2 , Hydroxy-3,1-tert-butyl-5,1-carboxyphenyl) benzotriazole.
- Preferred are 2- (5-methyl-2-hydroxyphenyl) benzotriazole and 2- [2, -hydroxy-3 ', 5'bis ( ⁇ ,
- salicylate-based ultraviolet absorber examples include phenol salicylate, resorcinol monobenzoate, 2,4-di-tert-butylphenol 3,5-di-tert-butyl-4-hydroxybenzoate, and 2,4- Benzoates such as di-tert-amylphenol 3,5-di-tert-butyl-4-hydroxybenzoate, hexadecyl-3,5-di-tert-butyl-4-hydroxybenzoate; 2-ethyl-2, ethoxyxalide, 2 Ethoxy 4, dodecylokiza Lido and others.
- Examples of the benzophenone-based ultraviolet absorber include 2-hydroxy-4-methoxybenzophenone, 2,2, dihydroxy-4-methoxybenzophenone, 2-hydroxy-4n-octyl, and xybenzophenone. , 2'-dihydroxy-4-methoxybenzophenone, 2,4-dihydroxybenzophenone, 2-hydroxy-4 octoxybenzophenone, 5,5'-methylenebis (2-hydroxy-4-methoxybenzophene Non).
- Examples of the cyanoacrylate-based ultraviolet absorber include ethinolate ⁇ -cyano j8, ⁇ -diphenyl atalylate, and methyl-2-cyano 3-methyl-3- ( ⁇ -methoxyphenyl) acrylate.
- Examples of the triaryltriazine-based ultraviolet absorber include 2- (2-hydroxy-4otatoxyl) 4,6bis (2,4-di-tert-butylphenyl) -s-triazine and 2- (2-Hydroxy-4-methoxyphenyl) 4,6-diphenyl-s-triazine, 2- (2-hydroxy-4-propoxy-5-methylphenyl) 4,6-bis (2,4-di-tert-butylphenyl) Le) — s — triazine, etc.
- benzotriazole-based ultraviolet absorbers from the viewpoints of versatility, handling, properties, cost, and ultraviolet absorption characteristics, benzotriazole-based ultraviolet absorbers, salicylate-based ultraviolet absorbers, and benzophenone-based ultraviolet absorbers are preferred. Further, it is more preferable from the viewpoint of imparting ultraviolet light resistance to the light diffusion layer 15 using both the ultraviolet absorber and the hindered amine radical scavenger.
- the amount of calo added to the above-mentioned ultraviolet absorbent is 0.001-10 parts by mass, preferably 0.05-3 parts by mass, per 100 parts by mass of the ionizing radiation-curable resin. If the amount is less than this range, the ultraviolet absorption is small, and the ultraviolet resistance is insufficient.
- This range force may be appropriately selected and used depending on the application.
- ultraviolet rays are selected as the ionizing radiation, it is necessary to minimize absorption of the ultraviolet rays for curing the ionizing radiation-curable resin with an ultraviolet absorber.
- FIG. 3 is a process chart of a manufacturing method showing one embodiment of the present invention.
- FIG. 4 is a schematic cross-sectional view of a part of an apparatus for manufacturing a light diffusing film showing one embodiment of the present invention.
- the light diffusion film of the present invention is a method known in Japanese Patent No. 3233669, US Pat. No. 4,576,850, and the like (referred to by those skilled in the art as a so-called DPS method (drum printing system)) as shown in FIG. . It comprises (a) a filling step 201, (b) a contacting step 202, (c) a curing step 203, (d) a contacting step 204, and (e) a peeling step 205.
- Filling step 201 is a step of rotating a roll intaglio 101 on which a finely embossed mold having light diffusing properties is formed, and filling at least a concave portion 112 of the roll intaglio 101 with an ionizing radiation-curable resin liquid 113. It is.
- the transparent base material 11 running in synchronization with the rotation direction of the roll intaglio 101 is brought into contact with the ionizing radiation-curable resin liquid 113 filled in the roll intaglio 101 in the filling step 201. It is a process.
- the adhesion step 204 is a step of bringing the ionizing radiation-curable resin liquid 113 cured in the curing step 203 into close contact with the transparent substrate 11. It should be noted that the curing step 203 and the adhesion step 204 usually proceed simultaneously.
- the peeling step 205 a fine uneven shape is formed in the curing step 203, and the cured product 113a of the ionizing radiation-curable resin 113 closely adhered in the adhesion step 204, ie, the ionizing radiation-curable resin and the transparent substrate.
- the filling step 201 is performed by a method such as filling with a die 120 having a cavity 122 as shown in FIG. 4A, or directly applying a coating roll to the surface of the roll intaglio 101.
- the concave portion 112 of the roll intaglio 101 is formed in a large rectangular shape for explanation of the process, but in the present invention, the concave and convex shape may be fine.
- the ionizing radiation curable resin 113 supplied from the die 120 to the roll intaglio 101 side is dried by the solvent drying device 121 and cured by the ionizing radiation of the curing device 117a.
- the ionizing radiation-curable material provided on the transparent substrate 11 is used.
- the cured product 113a of the fat liquid is further cured by ionizing radiation from the curing device 117b.
- a plurality of curing devices 117a may be provided above the roll intaglio 101, and the ionizing radiation-curable resin liquid may be sequentially cured by the plurality of curing devices 117a.
- the light diffusion film 1 having the transparent base material 11 and the light diffusion layer 15 provided on the transparent base material 11 and having the fine unevenness 17 formed on the surface is obtained.
- abrasive examples include particles such as silicon carbide, alundum, corundum, alumina, chromium oxide, zirconium oxide, and garnet having an average particle diameter of about 100 / zm, white molten alumina, green silicon carbide, white zircon, and the like. Ceramic beads and glass beads are applicable.
- the fine irregularities have a surface roughness Rz of 0.5 to 20.0 according to JIS-B-0601.
- Ionizing radiation means among electromagnetic waves or charged particle beams, those having energy quanta capable of polymerizing and cross-linking molecules, and ultraviolet rays, electron beams and the like are usually used.
- the curing device 117 in the case of ultraviolet light, at least one wavelength of ultraviolet light of 190 to 380 nm, such as ultra-high pressure mercury lamp, high pressure mercury lamp, low pressure mercury lamp, carbon arc, black light lamp, metal nitride lamp, etc. It is possible to use a light source that contains such ultraviolet rays in the radiation spectrum.
- an electron beam various types of electron beam accelerators such as a Cockloft-Walton type, a bande graph type, a resonance transformer type, an insulating core transformer type, a linear type, a dynamitron type, a high frequency type, etc.
- an electron source having an energy of 50 to 1000 keV, preferably 70 to 300 keV.
- the irradiation dose is usually preferably about 0.5 to 30 Mrad.
- the surface light source device 50 of the present invention includes at least a light source 21 and a reflector for projecting light from the light source in a predetermined direction as shown in FIG. 27 and light diffusion fill 1 and a lens film 40 (the dimensions of the lens are shown in an enlarged and exaggerated manner), and if necessary, other optical films.
- the light diffusion film 1 is disposed immediately above the opening 27b of the reflection plate 27, which is the position where light emitted from the light source 21 is first received.
- the other optical films such as the lens film 40 and the liquid crystal display panel 30 are mounted above the light diffusion film 1, and visible light from which the ultraviolet rays of the light from the light source 21 are removed enters the liquid crystal display panel 30. .
- the light diffusing film 1 is characterized by containing an ultraviolet absorber.
- a plurality of light sources 21 are arranged in order to obtain sufficient luminance required for image display. For example, for a 21-inch (diagonal line) screen, arrange about 12 cold cathode ray tubes.
- the surface light source device 50 of the present invention absorbs and removes the ultraviolet light of the light source light by the light diffusion film 1 which first receives the light emitted from the light source 21. Therefore, it is not necessary to add an ultraviolet absorber to other optical films such as the lens film 40 and the polarizing film located thereon, and the optical function is not affected.
- the liquid crystal display panel 30 is provided on the light exit side of the surface light source device 50 of the present invention.
- the liquid crystal display device 60 may be of various known types, and may be black and white or color (including natural colors). Also, it may display numbers and characters used on the display unit of a clock, an electronic desk calculator, various instruments, a word processor, etc., or may display general images such as for a television or an output monitor of an electronic computer. Good.
- the monitor is a large screen TV or a monitor for displaying notices in public places, which has a direct type surface light source having a strong and plural light sources.
- PET film A4300 (trade name of PET film, manufactured by Toyobo Co., Ltd.) having a thickness of 188 ⁇ m was used.
- PET film A4300 trade name of PET film, manufactured by Toyobo Co., Ltd.
- the DPS method described in the specification was used as a method for forming the light diffusion layer 15.
- the mouth The roller intaglio 101 was rotated, and at least the concave portion 112 of the roll intaglio 101 was filled with an ionizing radiation-curable resin solution having the following composition.
- the transparent substrate 11 (referred to as the front side) running in synchronization with the rotation direction of the roll intaglio 101 was brought into contact. During the contact, 75% of the travel was performed from the side of the transparent substrate 11 to the ionizing radiation-curable resin using two UV lamps D bulb 117a (manufactured by Fusion Co., Ltd., product name of curing device) 240WZcm.
- Ultraviolet rays were irradiated at a speed of 15 mZmin to cure.
- the ionizing radiation-cured resin (cured product 113a), which was cured at the same time as the curing, and the transparent substrate were in close contact with each other, and the fine concave-convex shape of the concave portion 112 was formed.
- the light-diffusing layer 15 was formed on the transparent substrate 11 by peeling off the cured product and the transparent substrate with the roll intaglio force.
- the light diffusion layer 15 was provided also on the rear surface side of the transparent substrate 11 in the same manner as on the front surface side, and the light diffusion film 1 of Example 1 was obtained. On both surfaces of the light diffusion film 1, concave and convex shapes corresponding to the surface shape of the roll intaglio were formed.
- Examples of the ionizing radiation-curable resin liquid of Example 1 include a trifunctional urethane atalylate oligomer (58 parts by mass), tetraethylene glycol diatalate (15 parts by mass), tripropylene glycol diatalate (10 parts by mass), and hydroxyvivalic acid.
- Neopentyl glycol diatalate 10 parts by mass ADK STAB LA-31 (manufactured by Asahi Deni Dakogyo Co., Ltd., benzotriazole ultraviolet absorber) 2 parts by mass, irgacure 184 (manufactured by Ciba Specialty Chemical Co., Ltd. Agent name) 5 parts by mass.
- a light diffusion finolem was obtained in the same manner as in Example 1, except that the following ionizing radiation-curable resin solution was used.
- Examples of the ionizing radiation-curable resin solution of Example 2 include a pentafunctional urethane atalylate oligomer (59 parts by mass), tetraethylene glycol diatalate (15 parts by mass), tripropylene glycol diatalate (10 parts by mass), and hydroxyvivalic acid.
- Example 3 A light diffusion finolem was obtained in the same manner as in Example 1, except that the following ionizing radiation-curable resin solution was used.
- Examples of the ionizing radiation-curable resin solution of Example 3 include: 59.5 parts by mass of a trifunctional urethane atalylate oligomer, 15 parts by mass of tetraethylene glycol diatalylate, 10 parts by mass of tripropylene glycol diatalylate, and hydroxyviva.
- a light diffusion finolem was obtained in the same manner as in Example 1, except that the following ionizing radiation-curable resin solution was used.
- Examples of the ionizing radiation-curable resin liquid of Example 4 include 59.5 parts by mass of a pentafunctional urethane atalylate oligomer, 15 parts by mass of tetraethylene glycol diatalylate, 10 parts by mass of tripropylene glycol diatalylate, and hydroxyviva.
- a light diffusion finolem was obtained in the same manner as in Example 1, except that the following ionizing radiation-curable resin solution was used.
- the ionizing radiation-curable resin liquid of Comparative Example 1 was composed of 60 parts by weight of an urethane atalylate oligomer, 15 parts by weight of tetraethylene glycol diatalate, 10 parts by weight of tripropylene glycol diatalylate, and neopentyl glycol hydroxyvivalate.
- the amount was 10 parts by mass of diatalylate, and 5 parts by mass of Irgacure 184 (trade name of photoinitiator, manufactured by Ciba Specialty Chemicals).
- Light diffusivity haze based on IS-K7361, and total light transmittance was used for transparency.
- the light diffusion and transparency are based on the haze meter HM150 (JIS-K-7361-1). It was measured using Murakami Color Research Laboratory Co., Ltd. (trade name).
- the hue is calculated using the hue b * (b star value) in the L *, a *, b * color system based on JIS-Z-8729 using a color luminance meter BM-7 (trade name, manufactured by Topcon Corporation). It was measured.
- the measurement conditions were as follows: After incorporating the light-diffusing films of Examples and Comparative Examples into a 21-inch (21-inch) surface light source device having a light source with 12 cold cathode ray tubes arranged in parallel, the center of the screen of the surface light source device The hue (b *) of each part was measured immediately after the incorporation and 5000 hours after light emission, and the difference between before and after was used as an index based on the hue change (b *). Table 1 shows the results of the evaluation.
- the light diffusion property (haze) of the examples was good, the transparency was good at 90% or more, and the hue change was 1.0 or less. No yellowing was observed, and discoloration to yellow or the like was suppressed by ultraviolet light from the light source.
- Example 1 Using the light diffusing film of Example 1, a light source having 12 cold cathode tubes arranged in parallel with the configuration shown in FIG. A type (21 inch) surface light source device was obtained.
- the surface light source device had no coloring over the front surface, and had uniform and sufficient luminance. No hue change such as yellowing was observed even after 5000 hours of lighting.
- a transmissive liquid crystal panel was mounted on the surface light source device of Example 5 in a configuration as shown in FIG. 1 to obtain a 21-inch (21-inch) TV monitor (liquid crystal display device). .
- the liquid crystal display device The displayed image was of good image quality. Even after 5000 hours of displaying the image, there was no noticeable change in the image quality or the like.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mathematical Physics (AREA)
- Optical Elements Other Than Lenses (AREA)
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- Planar Illumination Modules (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112004002586T DE112004002586T5 (de) | 2004-01-05 | 2004-12-28 | Lichtstreuungsfilm, Oberflächenlichtquelleneinheit und Flüssigkristallanzeige |
JP2005516857A JPWO2005066663A1 (ja) | 2004-01-05 | 2004-12-28 | 光拡散フィルム、面光源装置及び液晶表示装置 |
US10/583,281 US7497598B2 (en) | 2004-01-05 | 2004-12-28 | Light diffusion film, surface light source unit, and liquid crystal display |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004-000125 | 2004-01-05 | ||
JP2004000125 | 2004-01-05 |
Publications (1)
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WO2005066663A1 true WO2005066663A1 (ja) | 2005-07-21 |
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ID=34746935
Family Applications (1)
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PCT/JP2004/019620 WO2005066663A1 (ja) | 2004-01-05 | 2004-12-28 | 光拡散フィルム、面光源装置及び液晶表示装置 |
Country Status (6)
Country | Link |
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US (1) | US7497598B2 (ja) |
JP (1) | JPWO2005066663A1 (ja) |
KR (1) | KR20060116016A (ja) |
DE (1) | DE112004002586T5 (ja) |
TW (1) | TW200528873A (ja) |
WO (1) | WO2005066663A1 (ja) |
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JP2007059378A (ja) * | 2005-07-25 | 2007-03-08 | Toyoda Gosei Co Ltd | 光源装置 |
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JP2008266409A (ja) * | 2007-04-18 | 2008-11-06 | Goyo Paper Working Co Ltd | 紫外線硬化性樹脂組成物及びこれを用いた複合シート |
JP2010256890A (ja) * | 2009-03-30 | 2010-11-11 | Sumitomo Chemical Co Ltd | 液晶表示装置 |
WO2012046754A1 (ja) * | 2010-10-05 | 2012-04-12 | 日本カーバイド工業株式会社 | 光学シート |
JP5914751B2 (ja) * | 2013-03-28 | 2016-05-11 | リンテック株式会社 | 光拡散フィルム |
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KR20100012666A (ko) * | 2008-07-29 | 2010-02-08 | 엘지전자 주식회사 | 광학 시트 및 이를 구비한 액정표시장치 |
JP5310417B2 (ja) * | 2009-09-10 | 2013-10-09 | ソニー株式会社 | 液晶表示装置および電子機器 |
KR20110054464A (ko) * | 2009-11-17 | 2011-05-25 | 삼성모바일디스플레이주식회사 | 표시 장치 |
KR101180747B1 (ko) * | 2010-03-17 | 2012-09-10 | 인산디지켐 주식회사 | 광경화성 조성물, 광확산 시트 및 프리즘 시트를 일체화한 백라이트 유닛용 복합 광학 시트, 및 이의 제조방법 |
DE112016001908B4 (de) * | 2015-11-20 | 2022-12-29 | AGC Inc. | Gekrümmtes Substrat mit Film, Verfahren zu dessen Herstellung und Bildanzeigevorrichtung |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05203939A (ja) * | 1991-11-25 | 1993-08-13 | Seiko Epson Corp | 液晶表示装置及びその製造法 |
US6117919A (en) * | 1997-07-31 | 2000-09-12 | Canon Kasei Kabushiki Kaisha | Anti-fogging article and composition for forming anti-fogging coating film |
JP2001021706A (ja) * | 1999-07-02 | 2001-01-26 | Dainippon Printing Co Ltd | 光拡散フィルム、面光源装置、及び表示装置 |
JP2001159703A (ja) * | 1999-12-03 | 2001-06-12 | Dainippon Printing Co Ltd | 光拡散フィルム、面光源装置及び液晶表示装置 |
WO2003038787A1 (fr) * | 2001-10-31 | 2003-05-08 | Mitsubishi Chemical Corporation | Dispositif d'affichage |
JP2005070253A (ja) * | 2003-08-22 | 2005-03-17 | Toppan Printing Co Ltd | 表示装置背面光源用反射シート |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4576850A (en) * | 1978-07-20 | 1986-03-18 | Minnesota Mining And Manufacturing Company | Shaped plastic articles having replicated microstructure surfaces |
JP3233669B2 (ja) | 1991-12-25 | 2001-11-26 | 大日本印刷株式会社 | 光拡散シートの製造方法 |
JP2001042108A (ja) | 1999-07-29 | 2001-02-16 | Dainippon Printing Co Ltd | マットフィルム、面光源装置、及び液晶表示装置 |
JP3827932B2 (ja) * | 2000-01-31 | 2006-09-27 | 日東電工株式会社 | 光拡散層、光拡散性シート及び光学素子 |
DE60123182T2 (de) * | 2000-02-10 | 2007-09-20 | Teijin Ltd. | Polyesterfolienverbund, Lichtstreuplatte und deren Verwendung |
JP4181794B2 (ja) | 2001-06-01 | 2008-11-19 | ダイセル化学工業株式会社 | 異方性拡散フィルム |
JP2003248218A (ja) * | 2001-12-18 | 2003-09-05 | Mitsubishi Chemicals Corp | ディスプレイ用フィルター及びディスプレイ装置 |
JP4198372B2 (ja) * | 2002-03-22 | 2008-12-17 | 株式会社日立製作所 | 液晶表示装置 |
-
2004
- 2004-12-28 DE DE112004002586T patent/DE112004002586T5/de not_active Withdrawn
- 2004-12-28 US US10/583,281 patent/US7497598B2/en not_active Expired - Fee Related
- 2004-12-28 WO PCT/JP2004/019620 patent/WO2005066663A1/ja active Application Filing
- 2004-12-28 JP JP2005516857A patent/JPWO2005066663A1/ja active Pending
- 2004-12-28 KR KR1020067013082A patent/KR20060116016A/ko not_active Application Discontinuation
- 2004-12-31 TW TW093141785A patent/TW200528873A/zh not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05203939A (ja) * | 1991-11-25 | 1993-08-13 | Seiko Epson Corp | 液晶表示装置及びその製造法 |
US6117919A (en) * | 1997-07-31 | 2000-09-12 | Canon Kasei Kabushiki Kaisha | Anti-fogging article and composition for forming anti-fogging coating film |
JP2001021706A (ja) * | 1999-07-02 | 2001-01-26 | Dainippon Printing Co Ltd | 光拡散フィルム、面光源装置、及び表示装置 |
JP2001159703A (ja) * | 1999-12-03 | 2001-06-12 | Dainippon Printing Co Ltd | 光拡散フィルム、面光源装置及び液晶表示装置 |
WO2003038787A1 (fr) * | 2001-10-31 | 2003-05-08 | Mitsubishi Chemical Corporation | Dispositif d'affichage |
JP2005070253A (ja) * | 2003-08-22 | 2005-03-17 | Toppan Printing Co Ltd | 表示装置背面光源用反射シート |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007059378A (ja) * | 2005-07-25 | 2007-03-08 | Toyoda Gosei Co Ltd | 光源装置 |
JP4640248B2 (ja) * | 2005-07-25 | 2011-03-02 | 豊田合成株式会社 | 光源装置 |
WO2008100058A1 (en) * | 2007-02-16 | 2008-08-21 | Kolon Industries, Inc. | Diffusion plate |
JP2008266409A (ja) * | 2007-04-18 | 2008-11-06 | Goyo Paper Working Co Ltd | 紫外線硬化性樹脂組成物及びこれを用いた複合シート |
JP2010256890A (ja) * | 2009-03-30 | 2010-11-11 | Sumitomo Chemical Co Ltd | 液晶表示装置 |
WO2012046754A1 (ja) * | 2010-10-05 | 2012-04-12 | 日本カーバイド工業株式会社 | 光学シート |
JP5914751B2 (ja) * | 2013-03-28 | 2016-05-11 | リンテック株式会社 | 光拡散フィルム |
US9869803B2 (en) | 2013-03-28 | 2018-01-16 | Lintec Corporation | Composition for light diffusion film, and light diffusion film |
CN107238977A (zh) * | 2017-08-07 | 2017-10-10 | 河源市乐源智能科技有限公司 | 一种高效散热的液晶显示屏 |
JP2019144283A (ja) * | 2018-02-16 | 2019-08-29 | 株式会社サンリッツ | 偏光板および画像表示装置 |
JP7041542B2 (ja) | 2018-02-16 | 2022-03-24 | 住友化学株式会社 | 液晶表示装置 |
Also Published As
Publication number | Publication date |
---|---|
US20070177386A1 (en) | 2007-08-02 |
JPWO2005066663A1 (ja) | 2007-12-20 |
TW200528873A (en) | 2005-09-01 |
KR20060116016A (ko) | 2006-11-13 |
US7497598B2 (en) | 2009-03-03 |
TWI359311B (ja) | 2012-03-01 |
DE112004002586T5 (de) | 2006-11-16 |
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