CN101802654B - Multifunctional optical film - Google Patents
Multifunctional optical film Download PDFInfo
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- CN101802654B CN101802654B CN2008801058214A CN200880105821A CN101802654B CN 101802654 B CN101802654 B CN 101802654B CN 2008801058214 A CN2008801058214 A CN 2008801058214A CN 200880105821 A CN200880105821 A CN 200880105821A CN 101802654 B CN101802654 B CN 101802654B
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- optical film
- multifunctional optical
- film
- diffusion layer
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Classifications
-
- 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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- 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
- G02B5/04—Prisms
-
- 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
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- 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
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Disclosed is a multifunctional optical film for a liquid crystal display, which can uniformly diffuse light emitted from a light guide plate and a diffusion plate, improve brightness, have a prism layer that can be easily formed on the light diffusion layer, exhibit excellent shielding performance, and reduce light loss, thereby remarkably reducing manufacturing processes and manufacturing costs, and can realize a thinner liquid crystal display than a conventional configuration consisting of separate films such as a light diffusion film and a prism film. The multifunctional optical film can prevent light loss and damage of a film sheet due to light interference, scattering or absorption caused by using a plurality of films.
Description
Technical field
The present invention relates to a kind of multifunctional optical film that is used for LCD.
Background technology
Along with modern industrial society developed towards the advanced information age, as showing that the electronic console with transmitting various information medias becomes more and more important.In the past, (Cathode RayTube CRT) once by extensive employing, but faces sizable restriction from the angle of installation footprint to bulky cathode-ray tube (CRT), thereby is difficult to the bigger CRT of manufacturing dimension.Therefore, CRT is just replaced by various flat-panel screens now, comprises LCD (LCD), plasma scope (PDP), Field Emission Display (FED) and display of organic electroluminescence etc.In these flat-panel screens, LCD is technology-intensive product particularly, and it is from the combination of liquid crystal and semiconductor technology, and has advantage, because they are frivolous and power consumption is low.Therefore, just continuing to carry out about the research and development of its structure and manufacturing technology.Now; The display of desktop computer, and the LCD in the field of Portable, personal communication device (PDA(Personal Digital Assistant) and mobile phone) have been applied to such as notebook computer; Also just with bigger size manufacturing; Thereby can LCD be applied to the large scale TV, such as high definition (High Definition, HD) TV.Therefore, LCD is gazed at as replacing the new-type display that was once belonging to the pronominal CRT of display.
With regard to LCD, because liquid crystal itself can not be luminous, thus to establish a light source in addition at its back side, so that the light intensity that liquid crystal is passed through in control in each pixel is to realize contrast.More specifically, LCD serves as the electrical property that utilizes liquid crystal material to regulate the device of transmittance, and its emission is from the light of an illuminator that is installed on its back side; Let the light that is sent through multiple functional prism film or sheet material again, thereby make light evenly reach orientation, thereafter; Let so controlled light through an optical filter; Thereby realization redness, green and blueness (R, G, B).In addition, LCD belongs to indirect emission type, and the contrast of controlling each pixel through electrical method realizes image.In this connection, the light-emitting device that is provided with light source is regarded as the key factor that decision comprises the LCD picture quality of brightness and uniformity coefficient.
The main instance of this light-emitting device is exactly a back light unit.Fig. 1 has shown general back light unit.Usually, back light unit uses luminous such as the light source 1 of cold-cathode fluorescence lamp (CCFL), makes issued light successively through LGP 3, diffusion sheet 4 and prismatic lens 5, thus arrive at liquid crystal panel 6.The function of LGP 3 is to transmit the light that light source 1 is sent; So that it is distributed on the whole front surface of liquid crystal panel 6 on plane; 4 of diffusion sheets are realized uniform light intensity on the whole front surface of screen; And have shielding function simultaneously, make and can not see the device that is installed on diffusion sheet 4 belows, such as light source 1 from front surface.The function of prismatic lens 5 is control light paths, makes along the light of a plurality of directions through diffusion sheet 4, is changed in the view angle theta scope that is fit to let the beholder can see image.In addition, the below of LGP 5 is provided with a reflector plate 2, does not arrive at liquid crystal panel 6 and the light outside light path with reflection, makes such light be utilized once again, thereby increases the service efficiency of light source.
For the light that will launch so as previously mentioned is sent to liquid crystal panel effectively, a plurality of films with multiple function need be set.Yet, use a plurality of films to cause the generation of the interference of light, comprise the Newton ring phenomenon, in addition, when light during through said a plurality of film, light can suffer significant loss because of scattering or absorption.In addition, film also can be impaired because of the contact of to each other physics, thus bring undeservedly throughput rate low with the high problem of cost.In addition, with regard to the prism film of routine, except the layers of prisms of substrate layer and formation prism film, have the instance that the light granule proliferation is set at the another side of substrate layer.Yet this instance is disadvantageous, because limited aspect effective diffusion of light, and therefore the light at the interface through the light granule proliferation must still light loss can take place earlier through substrate layer before arriving at layers of prisms.
Equally in this example,, cause shielding function to reduce, cause still need using diffusion sheet to obtain screening performance owing to, as if fully do not pay close attention to the shielding function of diffusion sheet for the loss that reduces light too focuses in the improvement of transparency.
Summary of the invention
Therefore; The inventor has designed a kind of multifunctional optical film; It is adhered to each other and is formed by the film of lesser amt; But can demonstration and the conventional blooming identical functions that constituted of optical diffusion film, prism film and diaphragm trilamellar membrane, solve the problem of using a plurality of film to cause thus, and can reduce manufacture process and manufacturing cost significantly.
Therefore, the present invention provides a kind of multifunctional optical film, and wherein layers of prisms can easily be formed on the light diffusion layer, through the adhesive resin of control light diffusion layer and the refractive index difference between its light granule proliferation, shows remarkable screening performance.
In addition, the present invention provides a kind of multifunctional optical film, has appropriate brightness and good visual angle.
In addition, the present invention provides a kind of back light unit assembly, can avoid producing the problem because of using a plurality of films to cause, and represents remarkable screening performance and appropriate brightness and visual angle simultaneously.
According to a preferred embodiment of the invention, multifunctional optical film can comprise: the transparent substrates layer; Be formed on the surface of transparent substrates layer and have the light diffusion layer of adhesive resin and light granule proliferation, wherein the refractive index difference between light granule proliferation and the adhesive resin is greater than 0.05; And be formed at the layers of prisms on the light diffusion layer.
In the multifunctional optical film according to the embodiment of the invention, light diffusion layer can comprise the adhesive resin of 100 weight portions, and the particle diameter of 10 to 500 weight portions is the light granule proliferation of 1 to 50 μ m.
Multifunctional optical film according to the embodiment of the invention also can comprise: the bottom of adhesive resin and particle is gone up and is had on another surface that is formed at the transparent substrates layer.
In the multifunctional optical film according to the embodiment of the invention, the particle of bottom can be identical or different with the light granule proliferation of light diffusion layer.
In the multifunctional optical film according to the embodiment of the invention, the refractive index of the adhesive resin of the comparable light diffusion layer of refractive index of layers of prisms is high by 0.01 to 0.2.
In the multifunctional optical film according to the embodiment of the invention, layers of prisms can have the linearity or the non-linear array pattern of any structure that is selected from polygonal wimble structure, conical structure, hemispherical dome structure and non-spherical structure.
According to another preferred embodiment of the invention, the back light unit assembly can comprise said multifunctional optical film; And be arranged at the arbitrary lip-deep optical diffusion film of said multifunctional optical film.
According to another preferred embodiment of the invention, the back light unit assembly can comprise said multifunctional optical film; And be arranged at the arbitrary lip-deep prism film of said multifunctional optical film.
According to another preferred embodiment of the invention, the back light unit assembly can comprise said multifunctional optical film; And be arranged at the arbitrary lip-deep diaphragm of said multifunctional optical film.
According to the present invention, multifunctional optical film can represent remarkable screening performance, spreads the light that sends from LGP or diffusion sheet simultaneously equably, and improves brightness.
In addition; According to the present invention, multifunctional optical film can represent appropriate brightness and visual angle, thereby reduces manufacture process and cost thereof significantly; Compared to the traditional structure of forming by independent films such as optical diffusion film sheet, prism diaphragm and protection diaphragms, also can realize a kind of thinner LCD.
In addition, according to the present invention, multifunctional optical film can prevent also can prevent the damage of film owing to the light loss that the interference of light, scattering or absorption caused that a plurality of films cause is installed.
In addition, according to the present invention, owing to have remarkable screening performance and appropriate brightness and visual angle, the back light unit assembly can prevent to produce the problem because of using a plurality of films to cause.
Description of drawings
Fig. 1 is the synoptic diagram of the conventional back light unit of explanation.
Reference numeral:
1 light source, 2 reflector plates
3 LGPs, 4 diffusion sheets
5 prismatic lenses, 6 liquid crystal panels
Embodiment
Below will be elaborated to the present invention.
According to the present invention, the structure of multifunctional optical film by the transparent substrates layer, be formed at a lip-deep light diffusion layer of this transparent substrates layer, and the layers of prisms that is formed on this light diffusion layer constitutes.
The instance of transparent substrates layer comprises the polyethylene terephthalate film, polycarbonate membrane, polypropylene screen, polyethylene film, polystyrene film and gather epoxy (polyepoxy) film.What especially be suitable for is polyethylene terephthalate film or polycarbonate membrane.The thickness of transparent substrates layer can be set in the scope of 10 to 1000 μ m, is preferably 15 to 400 μ m, showing excellent physical strength, thermal stability and pliability, and prevents the loss of transmitted light.
A lip-deep light diffusion layer that is formed at the transparent substrates layer forms through the light granule proliferation is dispersed in the adhesive resin.In the present invention, the refractive index difference between adhesive resin and the light granule proliferation is controlled in more than 0.05, with the screening performance of guaranteeing to cause because of the refractive index difference between these two kinds of materials.
The adhesive resin of light diffusion layer comprises a kind of resin that can fully be adhered to the transparent substrates layer and have excellent compatibility with the light granule proliferation that is scattered in wherein; For example; A kind of light granule proliferation that can make is dispersed in it, makes the resin that they do not separate or deposit.The instantiation of such resin has: comprise unsaturated polyester (UP), methyl methacrylate, Jia Jibingxisuanyizhi, isobutyl methacrylate, n-BMA; Methacrylic acid normal-butyl methyl esters, acrylic acid, methacrylic acid, hydroxyethyl methacrylate; Hydroxy propyl methacrylate, hydroxy-ethyl acrylate, acrylic amide, NMA; GMA, ethyl acrylate, isobutyl acrylate, n-butyl acrylate; With homopolymer, multipolymer or the trimer of 2-EHA at interior acryl resin, amido formate resin, epoxy resin, and melamine resin.
The light granule proliferation that is contained in the light diffusion layer can the single or multiple lift form disperse, and particle diameter is preferably 1 to 50 μ m.Based on the adhesive resin of 100 weight portions, the consumption of light granule proliferation is 10 to 500 weight portions.When the light granule proliferation with aforementioned particle size uses with aforementioned quantities, the gonorrhoea that can prevent particle with separate, and can realize suitable light diffusion effect.
The light granule proliferation comprises multiple organic or inorganic particle.The instance of organic granular has: comprise methyl methacrylate, acrylic acid, methacrylic acid, hydroxyethyl methacrylate; Hydroxy propyl methacrylate, acrylic amide, NMA; GMA, ethyl acrylate, isobutyl acrylate; The homopolymer of n-butyl acrylate and 2-EHA or multipolymer in interior acrylic particles, comprise tygon, polystyrene; With polypropylene at interior alkene particle, propylene-olefin-copolymerization composition granule, and through forming earlier one deck homopolymer pellets, form one deck monomer on it again and the multilayer multi component particle for preparing.In addition, the instance of inorganic particle comprises monox, aluminium oxide, titanium dioxide, zirconia, and magnesium fluoride.These organic and inorganic particles only are used for explanation, are not limited to cited instance, as long as can realize fundamental purpose of the present invention and other known materials that obviously can know for those skilled in the art, all can replace.The situation that changes material category also falls into technical scope of the present invention.
In addition, on one of them surface of light diffusion layer, be formed with layers of prisms.
The instance of layers of prisms material therefor has: the fluoropolymer resin that comprises ultraviolet curable resin or heat reactive resin.What especially be suitable for is a kind of very transparent, and can form the resin combination of the crosslink bond that is suitable for keeping the optical texture shape.The instance of this resin has: epoxy resin-lewis acid or poly-hydroxyethyl, unsaturated polyester (UP)-styrene is with the acrylic or methacrylic acid esters.Very transparent acrylate resin or the methacrylate resin of suitable especially use.The instance of this resin has: comprise acrylic acid polyurethane or methacrylic acid polyurethane; Acrylic acid epoxy ester or methacrylic acid epoxy-ester; With acrylic polyester or methacrylic acid polyester at interior oligomer, and can use separately or use with a kind of acrylic monomers or methacrylic acid monomer dilution back with multiple functional radical or monofunctional.
In the present invention, layers of prisms can have linearity or the non-linear array pattern that is selected from any structure in polygonal wimble structure, conical structure, hemispherical dome structure and the non-spherical structure.
According to one embodiment of present invention, the refractive index of the adhesive resin of the refractive index ratio light diffusion layer of layers of prisms is high by 0.01 to 0.2, thereby reduces the total reflection of light, thereby reduces light loss.
Generally speaking, when the refractive index of layers of prisms was higher, the angle that light penetrates can narrow down towards the direction of advancing, and increasing front surface brightness, but the total reflection of light can further increase, and increases the loss of light undeservedly.
Simultaneously, on another surface of transparent substrates layer, that is, the transparent substrates layer with have on the surperficial facing surfaces of light diffusion layer, can be further through particle dispersion be formed bottom in adhesive resin.The adhesive resin of bottom comprises a kind of resin that can fully be adhered to the transparent substrates layer and have excellent compatibility with the particle that is scattered in wherein, that is a kind of uniform particles that can make is scattered in wherein, makes the resin that they do not separate or deposit.The instantiation of this resin can be identical with the adhesive resin of light diffusion layer.The particle that is contained in the bottom comprises organic or inorganic particle, and their instance can be identical or different with the light granule proliferation that contained in the light diffusion layer.
Based on the adhesive resin of 100 weight portions, when the consumption of the particle in the bottom is 0.01 to 30 weight portion, can brings into play required preventing and damage effect.With regard to organic granular, the brightness of front surface can reduce owing to the light diffusion; With regard to inorganic particle, light may or be absorbed from the particle surface reflection, thereby reduces the brightness of front surface, reduces the service efficiency of light undeservedly.Therefore the unsuitable excessive use of particle.
In addition; Bottom comprises by the formed surface of particle that is scattered in the adhesive resin outstanding; During loading or storing the assembly of blooming or blooming and other parts, play and reduce and the surface of contact of process apparatus, or with the effect of the contact area of another blooming placed on it; Thereby prevent because of being divided into indivedual films, transport or assemble the surface distress that possibly cause because of them.
According to the present invention; When two blooming pieces use with the stratiform form in back light unit; Can realize preventing the effect of surface distress through structure: wherein minimizing of the contact area between the blooming and particle have buffer action; Preventing damage to the prism top on surface with prism, or to the damage of surperficial facing surfaces with prism.
Therefore, multifunctional optical film according to the present invention has advantage, because evenly spread by the light granule proliferation of light diffusion layer through the light of transparent substrates layer, directly passes through layers of prisms then, thereby enlarges markedly the service efficiency of light.Therefore, compare with regular situation, light loss significantly reduces.In addition, the refractive index difference between the adhesive resin of light diffusion layer and the light granule proliferation increases, thereby guarantees its screening performance.Past separately makes to have the film of light diffusion function, screening performance and increase brightness function; Can wholely simultaneously make in the present invention; And can obtain to use optical diffusion film, prism film and diaphragm to be close to identical brightness with separating, thereby reduce manufacture process and manufacturing cost.In addition, because can reduce the diaphragm quantity that in the optical sheet assembly of back light unit, is provided with, the present invention can prevent owing to the problem of using a plurality of diaphragms to produce.
In addition, according to one embodiment of present invention, the back light unit assembly comprises said multifunctional optical film and the optical diffusion film or the prism film that on its arbitrary surface, form, thereby compares further increase brightness when only using multifunctional optical film.
According to another embodiment of the present invention; The back light unit assembly comprises said multifunctional optical film and the diaphragm that on its arbitrary surface, forms; Thereby separately use optical diffusion film in replacement; In the scope of prism film and diaphragm, realize screening performance and appropriate brightness, and reduce the quantity of its required diaphragm.
Therefore, when multifunctional optical film according to the present invention is applied to back light unit, can realize a kind of back light unit assembly with suitable brightness and visual angle.
Can obtain the present invention is better understood through the following example, said embodiment is used for explanation, shall not be construed as restriction scope of the present invention.
< embodiment 1 >
The 60 parts by weight of acrylic acid resins (52-666 that Aekyung Chemical company sells) and the binder combination of 40 weight portion high refractive index resins are diluted in the methyl ethyl ketone of 100 weight portions and the toluene of 50 weight portions; Regulating the solvent ratios in total component, be 1.55 adhesive resin to prepare a kind of refractive index.Amount with this adhesive resin is a benchmark then, and the mean grain size of mixing 130 weight portions is that 20 μ m and refractive index are 1.49 spherical poly methyl methacrylate particle (MH20F that Kolon company sells), uses muller to disperse then.
Then use intaglio plate coating machine (gravure coater) this spreading agent to be coated on the surface of transparent substrates layer; Particularly; Coat thickness and be on the surface of ultra transparent polyethylene terephthalate film (FHSS that Kolon company sells) of 188 μ m; Under 120 ℃ temperature conditions, solidified for 60 seconds then, promptly form the light diffusion layer that dried thickness is 20 to 25 μ m (refractive index is 1.55).
In addition, on a surface of the light diffusion layer that solidifies, be coated with a kind of 80 weight portion high index of refraction acrylic acid that contain; 15 weight portion methacrylic acid 2-phenyl chlorocarbonates; 3 parts by weight of acrylic acid-1, the photosensitive composition of 6-hexanediol ester and 2 weight portion BAPO base light trigger; To coat the upper surface that said photosensitive composition on the light diffusion layer is applied to the framework of prismatic roller again; Then to the outside surface irradiating ultraviolet light (Fusion company, 300watts per square inch) of this transparent substrates layer, form linear array with triangular prism and refractive index thus and be 1.60 layers of prisms.
< embodiment 2 >
Except that the non-linear array that on the one side of light diffusion layer, forms a kind of triangular prism with wave pattern and refractive index are 1.60 layers of prisms, according to making multifunctional optical film with embodiment 1 identical mode.
< embodiment 3 >
Except that ultra transparent polyethylene terephthalate film with have that to form dried thickness on the surperficial facing surfaces of layers of prisms be the bottom of 1 to 3 μ m, according to making multifunctional optical film with embodiment 1 identical mode.Wherein, Said bottom forms through following method: with the methyl ethyl ketone of 200 weight portions and the dilution with toluene 100 parts by weight of acrylic resins of 150 weight portions; The mean grain size that adds 20 weight portions based on the amount of adhesive resin is the spherical poly methyl methacrylate particle (MH10F that Kolon company sells) of 11.5 μ m; Use muller to disperse said particle, under 120 ℃ temperature conditions, solidified for 60 seconds then.
< embodiment 4 >
Except that ultra transparent polyethylene terephthalate diaphragm with have that to form dried thickness on the surperficial facing surfaces of layers of prisms be the bottom of 1 to 3 μ m, according to making multifunctional optical film with embodiment 2 identical modes.Wherein, Said bottom forms through following method: with the methyl ethyl ketone of 200 weight portions and the dilution with toluene 100 parts by weight of acrylic resins of 150 weight portions; The mean grain size that adds 20 weight portions based on the amount of adhesive resin is the spherical poly methyl methacrylate particle (MH10F that Kolon company sells) of 11.5 μ m; Use muller to disperse said particle, under 120 ℃ temperature conditions, solidified for 60 seconds then.
< embodiment 5 >
Except that in the forming process of light diffusion layer with the stratiform form dispersed light granule proliferation, according to making multifunctional optical film with embodiment 1 identical mode.
< embodiment 6 >
Except that in the forming process of light diffusion layer with the stratiform form dispersed light granule proliferation, according to making multifunctional optical film with embodiment 2 identical modes.
< embodiment 7 >
Except that ultra transparent polyethylene terephthalate diaphragm with have that to form dried thickness on the surperficial facing surfaces of layers of prisms be the bottom of 1 to 3 μ m, according to making multifunctional optical film with embodiment 5 identical modes.Wherein, Said bottom forms through following method: with the methyl ethyl ketone of 200 weight portions and the dilution with toluene 100 parts by weight of acrylic resins of 150 weight portions; The mean grain size that adds 20 weight portions based on the amount of adhesive resin is the spherical poly methyl methacrylate particle (MH10F that Kolon company sells) of 11.5 μ m; Use muller to disperse said particle, under 120 ℃ temperature conditions, solidified for 60 seconds then.
< embodiment 8 >
Except that ultra transparent polyethylene terephthalate diaphragm with have that to form dried thickness on the surperficial facing surfaces of layers of prisms be the bottom of 1 to 3 μ m, according to making multifunctional optical film with embodiment 6 identical modes.Wherein, Said bottom forms through following method: with the methyl ethyl ketone of 200 weight portions and the dilution with toluene 100 parts by weight of acrylic resins of 150 weight portions; The mean grain size that adds 20 weight portions based on the amount of adhesive resin is the spherical poly methyl methacrylate particle (MH10F that Kolon company sells) of 11.5 μ m; Use muller to disperse said particle, under 120 ℃ temperature conditions, solidified for 60 seconds then.
< embodiment 9 >
Except that in the forming process of light diffusion layer, using mean grain size is the light granule proliferation of 5 μ m, according to making multifunctional optical film with embodiment 2 identical modes.
< embodiment 10 >
A slice optical diffusion film (Kolon company sell LD602) is placed on the outside surface of transparent substrates layer of multifunctional optical film of embodiment 4.
< embodiment 11 >
A slice diaphragm (Kolon company sell LD143) is placed on the outside surface of layers of prisms of multifunctional optical film of embodiment 4.
< comparing embodiment 1 >
Preparation a slice optical diffusion film (LD602 that Kolon company sells).
< comparing embodiment 2 >
Preparation a slice prism film (LC213 that Kolon company sells).
< comparing embodiment 3 >
The prism film of comparing embodiment 2 is placed on the optical diffusion film of comparing embodiment 1.
< comparing embodiment 4 >
(LD143 that Kolon company sells) places on the prism film of comparing embodiment 2 with a slice diaphragm.
< comparing embodiment 5 >
On a diaphragm (LD143 that Kolon company sells), place the optical diffusion film of comparing embodiment 1 and the prism film of comparing embodiment 2 successively.
< comparing embodiment 6 >
Except that use refractive index in the forming process of light diffusion layer is 1.50 the adhesive resin, according to making multifunctional optical film with embodiment 2 identical modes.
Assess the characteristic of the multifunctional optical film of the foregoing description and comparing embodiment by following mode, assessment result is shown in following table 1.
< screening performance >
Each blooming of previous embodiment and comparing embodiment is installed to the back light unit of 17 cun LCD panels, can sees the pattern of LGP when detecting by an unaided eye according to following rule evaluation then:
Visibility: weak ← ◎-zero-△-* → strong
< interference of light >
Two bloomings of previous embodiment and comparing embodiment are placed between the glass substrate, to the glass substrate pressurization, observe thus then because of the caused interference of light of the excessive contact of film (Newton ring phenomenon), then according to following rule evaluation:
Newton ring: not generation ← ◎-zero-△-* → produce
<brightness (Cd/m
2)>
The blooming of previous embodiment and comparing embodiment is installed to the back light unit of 17 cun LCD panels separately or with the stratiform form; And use nitometer (the BM-7 model that Japanese Topcon company sells) to measure the brightness value of 13 random points; Give on average, again according to following rule evaluation:
◎: brightness is at 4500cd/m
2More than
Zero: brightness is more than 3500 and less than 4500cd/m
2
△: brightness is more than 3000 and less than 3500cd/m
2
*: brightness is less than 3000cd/m
2
< visual angle >
Each blooming of previous embodiment and comparing embodiment is installed to the back light unit of 17 cun LCD panels; Be as the criterion with center line again perpendicular to this unit; In the scope of 80 degree towards each limit by the interval of 10 degree, uses nitometer (the BM-7 model that Japanese Topcon company sells) to measure and works as the angle of brightness as high-high brightness one half.
Table 1
| Classification | Screening performance | Newton ring | Brightness | The visual angle (°) |
| Embodiment 1 | ○ | ○ | ○ | ±53 |
| Embodiment 2 | ○ | ◎ | ○ | ±53 |
| Embodiment 3 | ○ | ○ | ○ | ±53 |
| Embodiment 4 | ○ | ◎ | ○ | ±53 |
| Embodiment 5 | ○ | ○ | ○ | ±53 |
| Embodiment 6 | ○ | ◎ | ○ | ±53 |
| Embodiment 7 | ○ | ○ | ○ | ±53 |
| Embodiment 8 | ○ | ◎ | ○ | ±53 |
| Embodiment 9 | ○ | ◎ | ○ | ±53 |
| Embodiment 10 | ◎ | ◎ | ◎ | ±47 |
| Embodiment 11 | ○ | ◎ | ○ | ±51 |
| Comparing embodiment 1 | ○ | ◎ | △ | ±65 |
| Comparing embodiment 2 | × | △ | ○ | ±55 |
| Comparing embodiment 3 | ○ | △ | ◎ | ±47 |
| Comparing embodiment 4 | ○ | ◎ | △ | ±53 |
| Comparing embodiment 5 | ◎ | ◎ | ◎ | ±44 |
| Comparing embodiment 6 | △ | ◎ | ○ | ±55 |
Obviously visible from the assessment result of above characteristic, the refractive index difference between the particle of the adhesive resin of light diffusion layer and light diffusion layer is higher than among 0.05 the embodiment, and screening performance excellence and brightness and visual angle all are evaluated as proper level.In the multifunctional optical film of comparing embodiment 6, the refractive index difference between its adhesive resin and the light granule proliferation is not higher than 0.05, and screening performance is just good not as other embodiment.
In addition; Brightness, screening performance and the interference of light according to the multifunctional optical film of the embodiment of the invention are good; Reach optical diffusion film, prism film and diaphragm and be the degree of comparing embodiment 5 one on top of another, and to be wider than optical diffusion film, prism film and diaphragm be situation one on top of another at the visual angle.
Therefore; Multifunctional optical film of the present invention and the back light unit assembly that comprises this blooming can show remarkable screening performance really; Prevent the interference of light; And the service efficiency that when reducing light loss, increases light source, thereby realize and the prior art brightness about equally of using optical diffusion film and prism film respectively.In addition, the visual angle broadens, thereby has solved the problem of using a plurality of film to produce, and has reduced manufacture process and manufacturing cost significantly.
Claims (7)
1. multifunctional optical film, it comprises:
The transparent substrates layer;
Light diffusion layer, it is formed on the surface of this transparent substrates layer, and includes adhesive resin and light granule proliferation, and wherein the refractive index difference between this light granule proliferation and this adhesive resin is greater than 0.05; And
Layers of prisms, it is formed on this light diffusion layer,
Wherein, above-mentioned light diffusion layer comprises the said adhesive resin of 100 weight portions and the particle diameter of 10 to 500 weight portions is the said smooth granule proliferation of 1 to 50 μ m; And the refractive index of the adhesive resin of the above-mentioned light diffusion layer of refractive index ratio of above-mentioned layers of prisms is high by 0.01 to 0.2.
2. multifunctional optical film as claimed in claim 1 also comprises bottom, and it is formed at another surface of this transparent substrates layer, and includes adhesive resin and particle.
3. multifunctional optical film as claimed in claim 2, wherein the light granule proliferation of the particle of this bottom and this light diffusion layer is identical or different.
4. multifunctional optical film as claimed in claim 1, wherein this layers of prisms has linearity or the non-linear array pattern that is selected from any structure in polygonal wimble structure, conical structure, hemispherical dome structure and the non-spherical structure.
5. back light unit assembly, it comprises:
Like any described multifunctional optical film in the claim 1～4; And
Be arranged at the arbitrary lip-deep optical diffusion film of this multifunctional optical film.
6. back light unit assembly, it comprises:
Like any described multifunctional optical film in the claim 1～4; And
Be arranged at the arbitrary lip-deep prism film of this multifunctional optical film.
7. back light unit assembly, it comprises:
Like any described multifunctional optical film in the claim 1～4; And
Be arranged at the arbitrary lip-deep diaphragm of this multifunctional optical film.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020070090815A KR100988764B1 (en) | 2007-09-07 | 2007-09-07 | Multi-functional optic film |
| KR10-2007-0090815 | 2007-09-07 | ||
| PCT/KR2008/005174 WO2009031806A2 (en) | 2007-09-07 | 2008-09-03 | Multi-functional optical film |
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| CN101802654A CN101802654A (en) | 2010-08-11 |
| CN101802654B true CN101802654B (en) | 2012-05-30 |
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| CN2008801058214A Expired - Fee Related CN101802654B (en) | 2007-09-07 | 2008-09-03 | Multifunctional optical film |
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| KR (1) | KR100988764B1 (en) |
| CN (1) | CN101802654B (en) |
| TW (1) | TW200925729A (en) |
| WO (1) | WO2009031806A2 (en) |
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| US9366800B2 (en) * | 2012-03-30 | 2016-06-14 | Kimoto Co., Ltd. | Edge light-type backlight device and light diffusion member |
| CN103293575A (en) * | 2013-05-10 | 2013-09-11 | 张家港康得新光电材料有限公司 | Diffusion and brightness enhancement film and method for manufacturing same |
| TWI667431B (en) * | 2018-12-19 | 2019-08-01 | 明新學校財團法人明新科技大學 | Laser illumination device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1187639C (en) * | 2001-07-13 | 2005-02-02 | 兴隆发电子股份有限公司 | Optical guide plate and method for making its module core |
| WO2006132048A1 (en) * | 2005-06-06 | 2006-12-14 | Asahi Glass Company, Limited | Light diffusion plate and method for producing same |
| CN1886692A (en) * | 2003-11-26 | 2006-12-27 | 可隆株式会社 | Light diffusion film for LCD back-light unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4010542B2 (en) * | 2002-06-27 | 2007-11-21 | 日東電工株式会社 | Light diffusing sheet, optical element and image display device |
| JP2004045472A (en) * | 2002-07-09 | 2004-02-12 | Dainippon Printing Co Ltd | Light diffusing film, its manufacture method, surface light source device and liquid crystal display device |
| KR100930065B1 (en) * | 2004-01-08 | 2009-12-08 | 에스케이씨하스디스플레이필름(유) | Prism sheet for backlight unit, backlight unit and liquid crystal display device using same |
| KR100909427B1 (en) * | 2005-07-27 | 2009-07-28 | 주식회사 코오롱 | Light control film |
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2007
- 2007-09-07 KR KR1020070090815A patent/KR100988764B1/en active IP Right Grant
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- 2008-09-03 CN CN2008801058214A patent/CN101802654B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1187639C (en) * | 2001-07-13 | 2005-02-02 | 兴隆发电子股份有限公司 | Optical guide plate and method for making its module core |
| CN1886692A (en) * | 2003-11-26 | 2006-12-27 | 可隆株式会社 | Light diffusion film for LCD back-light unit |
| WO2006132048A1 (en) * | 2005-06-06 | 2006-12-14 | Asahi Glass Company, Limited | Light diffusion plate and method for producing same |
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| Publication number | Publication date |
|---|---|
| KR100988764B1 (en) | 2010-10-25 |
| WO2009031806A2 (en) | 2009-03-12 |
| TW200925729A (en) | 2009-06-16 |
| WO2009031806A3 (en) | 2009-05-07 |
| KR20090025736A (en) | 2009-03-11 |
| CN101802654A (en) | 2010-08-11 |
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