CN1802574A - Microstructured optical film and production process thereof - Google Patents

Microstructured optical film and production process thereof Download PDF

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Publication number
CN1802574A
CN1802574A CNA2004800156071A CN200480015607A CN1802574A CN 1802574 A CN1802574 A CN 1802574A CN A2004800156071 A CNA2004800156071 A CN A2004800156071A CN 200480015607 A CN200480015607 A CN 200480015607A CN 1802574 A CN1802574 A CN 1802574A
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China
Prior art keywords
blooming
microstructure
reflectance coating
reflection
image display
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Chinese (zh)
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佐野兴一
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3M Innovative Properties Co
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3M Innovative Properties Co
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
    • G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
    • B29C43/222—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length characterised by the shape of the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B29C59/022—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing characterised by the disposition or the configuration, e.g. dimensions, of the embossments or the shaping tools therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B29C59/026—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing of layered or coated substantially flat surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
    • B29C59/046—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts for layered or coated substantially flat surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/02—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G02B5/045—Prism arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/12—Reflex reflectors
    • G02B5/136—Reflex reflectors plural reflecting elements forming part of a unitary body
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0827—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using UV radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B29C59/022—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing characterised by the disposition or the configuration, e.g. dimensions, of the embossments or the shaping tools therefor
    • B29C2059/023—Microembossing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0002—Condition, form or state of moulded material or of the material to be shaped monomers or prepolymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2011/00—Optical elements, e.g. lenses, prisms
    • B29L2011/0083—Reflectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2551/00—Optical elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/02—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
    • B32B37/025—Transfer laminating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/06—Embossing

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Human Computer Interaction (AREA)
  • Laminated Bodies (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Liquid Crystal (AREA)
  • Position Input By Displaying (AREA)

Abstract

To provide an optical film (10) which is improved in visibility without the adhesive of a fingerprint and the deterioration of the contrast, is capable of resisting a scratch or the like, and is useful particularly for a touch panel or an image display device. The optical film (10) comprises a transparent reflection film (2) on the surface of which a plurality of surface reflection distribution areas (A) each containing at least one microstructure are provided.

Description

Microstructured optical film and production method thereof
Technical field
The present invention relates to blooming, specifically, have high visual blooming when relating on being adhered to input-output apparatus such as touch panel or graphic panel.The invention still further relates to the method that is easy to the such high-performance optics film of made with high precision.The invention still further relates to image display, on its picture display face, be provided with such blooming.
Background technology
Known electronic console comprises LCD (LCD), EL (electroluminescence) display, plasma display etc., and can be used to large-scale or the compact image display device.Many application all utilize input-output apparatus, such as touch panel that has electronic console or graphic panel.For example, touch panel is widely used in bank ATM (Automatic Teller Machine), because the visuality of display panels is improved recently.When using ATM, bank customer can directly be carried out input operation with his/her finger touch touch panel with the form of question and answer.Touch panel also is widely used in PDA (personal digital assistant).PDA comprises those commodity that (for example) sold, and the commodity of each company are by name: " Visor " of " Cassiopeia " of " Zaurus " of Sharp Corp, " Newton " of Apple, Casio computer company limited and Handspring company.When using PDA, the user can be by carrying out input operation with writing pencil (stylus pen) contact touch panel like a cork.And graphic panel is used to display device, instrument etc. in industrial setting.The operator of factory or user can monitor the device that is presented on the graphic panel, instrument etc. and control factory by the display surface that directly touches graphic panel with his/her finger or writing pencil.
As mentioned above, the performance of touch panel, graphic panel or other input-output apparatus depends on the visuality of display panels deeply.Yet, there is a problem, owing to cause display panels can not keep stable visuality for a long time by carrying out the I/O operation with the picture display face (hereinafter referred to as " contact I/O face ", " contact input face " or " surface of contact ") of finger or straight contact input-output apparatus.Because finger or pen with the user contact I/O face and repeatedly carry out various operations, light reflection owing to contact I/O face reduces with regard to the transparency that caused whole contact I/O face for this, and the visuality that therefore contacts I/O face reduces.And, when having light reflection as mentioned above, the into contact I/O face that can be reflected around the contact I/O face, visual thus the reduction.
Usually, for the visuality that prevents the I/O face that contacts reduces, contact I/O face has been provided with relief pattern.For example, a kind of hyaline membrane substrate production method has been suggested to be used to produce the hyaline membrane substrate of the contact side that places touch panel, wherein to be roughened into center line average roughness be 0.05 to 0.8 μ m to the contact input face side of substrate, and this uneven surface is coated with transparent metallic compound or synthetic resin (the open No.10-172377 of Japanese unexamined patent publication No.).
And, to have proposed to adopt molding such as lens, it is not to be target with the visuality of improving touch panel, but can prevent kopiopia by reducing the light reflection, and wears feel good (the open No.5-123378 of Japanese unexamined patent publication No.).On the surface of this molding, formed transparent coating, it comprises fine particulate dead matter of being made up of one or more concrete metal oxides and the polymeric silicon compound of being made up of one or more concrete organo-silicon compound.
Summary of the invention
One aspect of the present invention provides a kind of blooming that comprises transparent reflectance coating, is provided with a plurality of reflection distributive province on the surface of this reflectance coating, and each described distributive province all comprises at least one microstructure.
Described transparent reflectance coating can be used individually, that is, and and no substrate support, or can be supported by substrate.In the later case, described blooming preferably comprises the transparent sheet-like substrate and is formed on the transparent reflectance coating (being also referred to as " reflection horizon " in this manual) of this substrate one side.
Another aspect of the present invention provides a kind of blooming production method, and described method comprises that wherein each described distributive province all comprises at least one microstructure by through shifting a plurality of reflection distributive province being appended to the step that hyaline membrane one side is made reflectance coating.
In this blooming generation method, described reflectance coating can be made into not have the form of self-holding film of substrate or the form of the transparent reflecting layer supported by the transparent sheet-like substrate.
And the described transfer of described reflection distributive province can be undertaken by adopting stamping technique, or by with curable or coagulablely be used for that molded material is inserted mould and curable or coagulablely be used for molded material and harden and carry out to this.
Another aspect of the present invention provides a kind of image display, and it comprises and places its image
On the picture display face of display panel according to blooming of the present invention.
Description of drawings
Fig. 1 is the planimetric map according to the preferred embodiment of blooming of the present invention.
Fig. 2 is the sectional view that blooming II-II along the line shown in Figure 1 intercepts.
Fig. 3 is the sectional view according to another preferred embodiment of blooming of the present invention.
Fig. 4 is the sectional view according to another preferred embodiment of blooming of the present invention.
Fig. 5 is the sectional view according to another preferred embodiment of blooming of the present invention.
Fig. 6 is the partial enlarged view of blooming shown in Figure 5.
Fig. 7 is the skeleton view that is bonded with according to the PDA of blooming of the present invention.
Fig. 8 is the sectional view that PDA VIII-VIII along the line shown in Figure 7 intercepts.
Fig. 9 is the production that shows the in order sectional view according to the method for optimizing of blooming of the present invention.
Figure 10 shows the synoptic diagram of producing according to another method for optimizing of blooming of the present invention.
Detailed Description Of The Invention
As stated in the Background Art, although adopt existing method can reduce light reflection on the surface of contact and the reflection that enters the periphery of surface of contact, but still exist some by the concavo-convex problem that causes on the touch panel surface of contact.For example because relief pattern is formed on the surface of contact randomly, so the light that reflects on the surface of contact diffusion can take place and damage the contrast of surface of contact, thereby reduced the visuality of surface of contact.And with regard to the touch panel of his/her its surface of contact of finger contact, the marking such as finger mark also damages described visuality with regard to the user.
And with regard to the touch panel of writing pencil contact, hand-written quality also becomes problem with regard to the user.When surface of contact is smooth, writing pencil will skid on this face.When forming randomly on surface of contact as mentioned above when concavo-convex, moving of writing pencil may affect adversely, thereby causes poor performance and wrong input.In addition, surface of contact also may be a problem through the writing pencil scraping.
The objective of the invention is to solve the technical matters of above-mentioned existence.
That is, an object of the present invention is to provide a kind of visual blooming that improves, it prevents to damage the impression of the hand that shows contrast, but and scratch-resistant.Particularly, the invention provides a kind of blooming, this blooming can be adhered on input-output apparatus such as touch panel or the graphic panel, and the I/O face of providing.
Another object of the present invention provides a kind of method that is easy to made with high precision according to blooming of the present invention.
Another object of the present invention provides a kind of image display that can utilize according to the above-mentioned feature of blooming of the present invention.
Above-mentioned purpose with other of the present invention will become from following detailed description and be easy to understand.
As mentioned above, the present invention relates to blooming, blooming production method and image display, this image display comprise be bonded on its picture display face according to blooming of the present invention.Below with reference to accompanying drawings the preferred embodiment of the invention is described.Yet the present invention is not limited to specific embodiments as described below.
Can be arranged to control oneself film or the form of the film supported by substrate according to blooming of the present invention.Fig. 1 and Fig. 2 show the embodiment of the blooming of being supported by substrate.Fig. 2 is the sectional view that blooming 10 II-II along the line shown in Figure 1 intercept, and finds out easily that from Fig. 2 blooming 10 comprises transparent sheet-like substrate 1 and the transparent reflecting layer 2 that is formed in the substrate 1 at least.And blooming 10 comprises a plurality of lip-deep reflection distributive province A that are positioned at reflection horizon 2, and all is formed with microstructure 12 (for example, the prism-shaped microstructure of quadrangular pyramid shape) in each distributive province.If desired, can in each face reflection distributive province A, form two or more microstructures 12, but not shown.Preferably, the microstructure 12 on reflection horizon 2 has predetermined shape and height with the pattern form setting of rule, and presses the predetermined density distribution.
In blooming of the present invention, by being set, transparent microstructures (preferred prism-shaped microstructure) comes face reflection distributive province to be set being formed on the suprabasil reflection horizon of transparent sheet-like, the shape of described microstructure, height and distribution density are in check, can be reflected along all directions by the surface of microstructure thereby be incident on the lip-deep light of blooming, and can prevent from this plane to the strong direct reflection of a certain concrete direction.As a result, even strain (being attached to the surface of blooming such as impression of the hand) takes place, and this strain is not very remarkable, and the infringement of display performance also is suppressed and visual the raising thus.
" microstructure " refers to very small face pattern in this manual, and with the naked eye can not see its existence basically.That is, microstructure is a structure small on the microcosmic, when visually all can not clearly recognizing when its any one face is observed.Term " microcosmic " refers to the little feature of size: to such an extent as to size is enough little of need be equipped with the optics supplementary instrument to determine its shape to naked eyes when any viewing plane is observed.Can find a standard in 1996 on the 104-105 page or leaf by " contemporary optics engineering " book of McGraw-Hill publication what W.J.Smith write, wherein visual acuity is " angular dimension according to distinguishable minimal characteristic defines and measures ".Situation when normal visual acuity thinks that 5 arcs divide on the corresponding retina of minimum distinguishable feature angle is high.Under the general work distance of 250mm (10 inches), this lateral dimension that can draw this object features is 0.36mm (0.0145 inch).
In blooming of the present invention, the transparent sheet-like substrate can be adopted the various material of different-thickness.Usually, sheet form base preferably has the thickness of character such as not influencing visuality, permanance at least, when being bonded on the picture display face of image display when considering sheet form base to be used for image display, this sheet form base has enough flexibilities to adhesive.And, be used for input-output apparatus (such as touch panel) and under the bonding situation on it in this blooming intention, need have enough hardness and permanance and point or writing pencil institute applied pressure, and have enough flexibilities so that pressure is accurately transferred to input-output apparatus to stand.
Preferred sheet form base includes, but is not limited to the plastic foil made by the polypropylene of polyethylene terephthalate (PET), PEN (PEN), orientation, polycarbonate, triacetate etc. in enforcement of the present invention.Particularly, the PET film can be used as substrate.For example, polyester film is such as Tetron TMFilm, MELINEX TMFilm (can obtain from DuPont Teijin company) etc. can be used as substrate.These plastic foils are usually as monofilm, but if desired, two or more in these films are capable of being combined as composite membrane or stacked film.
And sheet form base can adopt various thickness according to the layer structure of blooming, concrete use etc., and the thickness that adopts usually be about 10 μ m to about 500 μ m, be preferably about 50 μ m to about 300 μ m.
In blooming of the present invention, the microstructure in its reflection horizon can be formed in the various forms in the scope of purpose of the present invention and effect, is preferably the prism-shaped microstructure because the prism-shaped microstructure can be on a plurality of directions dispersed light to prevent dazzle.An indefiniteness embodiment of prism-shaped microstructure comprises those microstructures of shapes such as depicted in figs. 1 and 2 quadrangular pyramid shape, triangular pyramidal, truncated cone shape.For example, Fig. 3 shows an embodiment of blooming 10, and wherein reflection horizon 2 is formed on the sheet form base 1, forms the prism-shaped microstructure of four jiaos of truncated cone shapes in each face reflection distributive province A in reflection horizon 2.If desired, can form, perhaps can under the situation of omitting sheet form base, make the reflection horizon be configured to reflectance coating, and produce the blooming (blooming of controlling oneself) of no substrate in the sheet form base below making microstructure and be positioned under the situation of omitting reflection horizon 2.
Microstructure can form various sizes.For example, when imagination was rectangle in the face reflection distributive province that wherein is provided with microstructure downwards when eminence is observed, a side length of rectangle was typically about 10 μ m to about 500 μ m, is preferably about 50 μ m to about 300 μ m.Although whether the height of microstructure is cut according to microstructure and change a little, the height of microstructure is typically about 10 μ m to about 500 μ m, is preferably about 50 μ m to about 300 μ m.
It is unrestricted such as the material in the reflection horizon of prism-shaped microstructure to be provided with microstructure thereon, but this material depends on preferred visible transparency.Glass, various plastic materials etc. can be used for forming the reflection horizon, and it is favourable using plastic material from processibility.
The same with sheet form base recited above, according to the layer structure of blooming, desired use etc., the reflection horizon also can be made into different-thickness by various plastic materials.The plastic material that is fit to includes, but is not limited to the potpourri of acryl resin, polycarbonate resin, vibrin, urethane resin, epoxy resin, polystyrene resin etc. and these resins.Representational plastic material can be suitably waits and selects according to viscosity (influencing operability), the refractive index of optical characteristics such as these resins.PET etc. are suitable as reflector material.
When being not easy to form, suggestion is by formation microstructures such as dubbing methods as described below when microstructure is very tiny.In this case, the reflection horizon is preferably formed by the sclerosis goods of curable or coagulable resin material.That is, the reflection horizon can be the film of making by this way, that is, form curable or coagulable resin material membranaceous and make its sclerosis by apply heat, light or other energy to it then.Therefore, curable or coagulable resin material is preferably heat cured resin material or photocurable resin material or thermoplastic resin material.Particularly, the resin material of photocurable (for example, can solidify through UV) need not big and long stove and forms the reflection horizon and can be cured in the short time relatively, and therefore this resin material of great use.Photocurable resin material preferably includes photocurable monomer and oligomer, preferably also comprises (partially) acrylate monomer and oligomer, that is, and and acrylate or methacrylate monomers and oligomer.
More particularly, the acrylate monomer that is suitable for forming the reflection horizon includes, but is not limited to urethane acrylate, polyester acrylate, polyether acrylate, acrylamide, vinyl cyanide, acrylic acid, acrylate etc.The acrylate oligomer that is suitable for forming the reflection horizon includes, but is not limited to urethane acrylate oligomer, epoxy acrylate oligomer etc.Particularly, urethane acrylate and oligomer thereof can the speed more much higher than all other acrylate be cured into the goods with flexible and toughness, therefore help to improve the throughput rate of blooming.In addition, when using such acrylate monomer or oligomer, can obtain the optical clear reflection horizon.These acrylate monomers and oligomer can be used alone or use with the form of two or more optional combination in them.Although as above concrete described be the feature etc. of acrylate monomer and oligomer, methacrylate monomers and oligomer also have similar feature etc.
Curable or coagulable resin material can comprise optional adjuvant.For example, be in the situation of photocurable resin material at curable resin material, photo-induced polymerization initiator is suitable for the adjuvant as them.For example, can select compound according to the kind of curable resin materials as suitable photo-induced polymerization initiator.Representational compound comprises acrylic acid phenoxy ethyl, 2-hydroxy-2-methyl-1-phenyl-third-1-ketone, two (2,4,6-trimethylbenzene acyl group)-phenyl phosphine oxides etc.These photo-induced polymerization initiators can use separately or use with their two kinds and the form of multiple combination.
Various different-thickness can be adopted according to the layer structure of blooming, desired use etc. in the reflection horizon on sheet form base.The thickness in reflection horizon is typically about 5 μ m to about 1000 μ m, is preferably about 10 μ m to about 100 μ m.
Except sheet form base and reflection horizon, blooming also can comprise optional element.
Fig. 4 is the sectional view according to another blooming of the present invention, and described blooming is to obtain by on the above-mentioned blooming of describing with reference to Fig. 2 extra play being set.Blooming 10 shown in Fig. 4 also comprises transparent thin protective finish 3, and it forms on the reflection horizon 2 that is formed on the side of sheet form base 1.If desired, protective finish 3 can form hard conating.Release liner 5 is bonded on the back side of sheet form base 1 by adhesive phase 4.Can make blooming 10 be adhered to touch panel etc. like a cork by release liner 5 is peeled off.
When protective finish formed the top layer of blooming with the form of shallow layer, it made blooming have soil resistance, favorable durability and high strength.Protective finish can be made by the optional layer manufacturing method that is coated with by various materials, from preventing to adhere to the angle of dust or analog, is preferably made by low-viscosity compound.The low viscous compound that is suitable for making protective finish includes, but is not limited to fluorochemicals, silicon-containing compound etc.Particularly, it is because they have good transparency and viscosity for being positioned at following reflection horizon that fluorochemicals is fit to, and can form by the form of shallow layer, and can not damage the lip-deep microstructure in reflection horizon.The fluorochemicals that is suitable for making protective finish is included in the compound of perfluoro-polyether group and alkoxysilane groups in the molecule.Such fluorochemicals is commercially available on market as the fluorine containing silane coupling agent, comprises the fluorine containing silane coupling agent that for example following chemical formula provides:
Solid: (in product, accounting for 20 weight %)
F-(CF 2CF 2CF 2O) n-Si (OMe) 3: 80 moles of %
F-(CF 2CF 2CF 2O) n-CF 2CF 3: 20 moles of %
The Me=methyl group
Solvent: (in product, accounting for 80 weight %)
(CF 3) 2-CFCF 2CF 2CF 3(perfluor isohexane)
This coupling agent can be called the product of " Optool DSX " available from the commodity that Daikin company produces.
Protective finish can form all thickness, and is preferably thin as far as possible when considering from reproducing aspects such as microstructure.The thickness of protective finish is typically about 0.1 to about 200nm, is preferably about 0.5 to about 100nm.
When blooming 10 comprised described with reference to Figure 4 adhesive phase 4, in considering aspect such as operability, adhesive phase 4 preferably was stripped from lining and is covered.As release liner and be used for release liner is connected to the adhesive phase of sheet form base, can use release liner and adhesive phase respectively with the routine that can choose thickness wantonly.
Generally speaking, advantageously, release liner can adopt various base stocks to constitute.The base stock that is suitable for making release liner comprises: paper; Plastic material such as tygon, polypropylene, polyester, cellulose acetate, Polyvinylchloride and polyvinylidene fluoride; And be coated with such as plastic material or be bonded with paper and other material of such plastic material thereon.Release liner can not treatedly be used according to former state ground, preferably handles to use after improving its peel property by siloxane treated method or other method at it.The thickness of release liner is generally (but non-being limited to) about 25 μ m to about 200 μ m.
And adhesive phase can be made by various bonding agents such as contact adhesive (PSA).The contact adhesive that can be used for making adhesive phase includes, but is not limited to acryloid cement, tackifier rubber, tackifier synthetic rubber, ethylene-vinyl acetate, siloxane etc.
A kind of like this bonding agent can be in being dispensed into water or solvent dry then or can be randomly further crosslinked after be painted on polymkeric substance on the release liner again.When adopting solvent or aqueous pressure-sensitive adhesive composition, making adhesive phase needs dried to remove all or most of solvent or water.Bonding agent can be a hotmelt.In addition, have that low-molecular-weight adhesive composition can be applied on the release liner and form such as heat, UV or electron beam polymerization by emittance then.
The thickness of adhesive phase can change in wide range according to many factors, and described factor comprises the composition of (for example) bonding agent, the structure of blooming and the thickness of release liner.Usually, the thickness of adhesive phase is that about 10 μ m are to about 50 μ m.
Fig. 5 shows the embodiment of the self-holding blooming of no substrate support.Blooming 41 is above-mentioned a kind of variants that comprise support and apply the blooming in reflection horizon on support, and has many microstructures 42 (the tiny prism-shaped microstructures of four jiaos of truncated cone shapes) on the surface of blooming 41, and is shown in Figure 6 as the view that amplifies.Blooming 41 can be made optional thickness by plastic material, and is similar to above-mentioned sheet form base and reflection horizon.The thickness of blooming 41 is typically about 10 μ m to about 1000 μ m.The spacing of microstructure 42 (p) changes between about 160 μ m and about 254 μ m usually, and their height changes between about 15 μ m at about 10 μ m usually.
And blooming 41 as shown in Figure 5 has adhesive phase 44 and in the release liner 45 at its back side.Adhesive phase 44 and release liner 45 can be respectively made by the adhesive phase 4 and release liner 5 identical materials of the blooming of describing with reference Fig. 4 10, and can be respectively make with the thickness identical with adhesive phase 4 and release liner 5.
More particularly, blooming 41 can comprise the optical clear PET film with 50 μ m thickness, and adhesive phase 44 that to be provided with thickness be 25 μ m is made by acryloid cement and the polyester that is coated with silicon remover (not shown) (PET) release liner 45 with 35.5 μ m thickness.The PET film is MELINEX TMFilm.Blooming 41 profiles are a plurality of four jiaos of truncated cone shape microstructures 42, form by aforesaid pattern, and this pattern has in the spacing that changes between the 160 and 254 μ m and the degree of depth that changes between 10 and 15 μ m.
Microstructure 42 can form at an easy rate by the PET film being arranged on the mode that hot steel rider (mould) is gone up and use flame stamping technique (flame embossing technique) impresses.The height of four jiaos of truncated cone shape microstructures is along with the increase of their density (along with their spacing reduces) and reduce.
The optical characteristics that blooming 41 is measured is transmissivity, light haze value and transparency.The light haze value of blooming increases and increases along with pattern density, but transmissivity and transparency are not measured tangible change substantially.
Blooming according to the present invention can be used for various image displays, and it is bonded on the picture display face of each image display in the mode of the reflection horizon side that exposes blooming usually.The image display that is fit to includes, but is not limited to LCD equipment, EL display device, plasma display panel device etc.If desired, blooming can be adhered on the equipment or goods that is different from image display.For example, blooming can be suitable as display device, comprises graphic films, photography plate (photograph plate), billboard etc.
Particularly, blooming of the present invention can be advantageously be used in combination with the mode of the image display with input-output apparatus (such as touch panel or graphic panel) with the surface of contact that is bonded in input-output apparatus, even because carry out input operation by the reflection horizon of pen or finger contact optical film, the peculiar various characteristics of blooming does not have weakened, and the infringement of blooming, pollution etc. can be reduced or avoid basically.The image display that input-output apparatus is installed includes, but is not limited to the Automatic Teller Machine (ATM) of touch panel type car navigation system, bank and personal digital assistant (PDA) etc.
Therefore, the invention still further relates to a kind of image display, it comprises the above-mentioned blooming on the picture display face that places its image display panel.And, can be advantageously implement according to image display of the present invention with various forms, preferably on its image display panel, have input-output apparatus (such as touch panel) and on input-output apparatus, have according to blooming of the present invention.In fact, do not get rid of image display, such as portable TV, display instrument, portable game machine and car navigation system with input-output apparatus (such as touch panel) according to image display of the present invention.
Fig. 7 is the skeleton view that has according to the PDA of typical image display device of the present invention.Its structure can be understood from Fig. 8, and Fig. 8 is the sectional view along the line VIII-VIII intercepting of Fig. 7.PDA 30 is constructed as follows: liquid crystal display 35 is contained in the shell 36, and touch panel 31 places on the picture display face of liquid crystal display 35, and blooming 41 according to the present invention is bonded on the touch panel 31.Shown in attention Fig. 7 is that blooming 41 is bonded to the state on the touch panel 31.
Shown in PDA 30 in, blooming 41 has with reference to Fig. 5 and the illustrated structure of Fig. 6.Blooming 41 comprises MELINEX TMFilm, it is optical clear polyester (PET) film, has the thickness of 50 μ m, is formed with microstructure (four jiaos of truncated cone shape microstructures) (not shown) in its surface.And, before blooming 41 used herein is bonded to touch panel 31, be that the acryloid cement layer of 25 μ m is that the PET release liner of 35.5 μ m is bonded on the back side of this blooming 41 with thickness by thickness, as described in reference Fig. 5.In enforcement of the present invention, the thickness of blooming 41 grades should not be subject to the foregoing description.For example, usually, the thickness of blooming is in about 10 to 100 mu m ranges, and the thickness of acryloid cement layer is the thickness of about 5 to 50 μ m, and the thickness of PET release liner is in about 20 to 200 mu m ranges.
Shown in PDA 30 in, blooming 41 can be adhered on the touch panel 31 like a cork.For example, when plastic cards etc. as posting device, the trouble such as air entrapment (bubble is captured) can not take place.Employed acryloid cement has other bounding force of controlled stage so that blooming can not spontaneously be peeled off, and can be removed when upgrading blooming and do not stay any rubber cement material basically.And, can on blooming, apply thin hard conating so that strengthen the ability of scratch-resistant in the regular period.
But the image displaying part of blooming 41 temporary protection PDA.When blooming is damaged owing to dust accretions and/or scraping, can renew.Yet, when blooming uses, can not peel off, and the user of PDA can fully trust it.
And; except scratch-resistant; blooming 41 can also protect the screen of PDA to exempt from dust and dirt influence in the air; when carrying out input operation with 37 pairs of touch panels of writing pencil; writing pencil can not skid on this touch panel, thus input operation can continue at an easy rate to carry out and have stability and good writing quality.That is, because its lip-deep microstructure has surfaceness to a certain degree, therefore has the feel that exactly likes in paper according to blooming of the present invention.Yet, wish that employed little copying pattern is made into to make that transmissivity, mist degree and the sharpness of diaphragm and display are not endangered basically, and the sensitivity that the writing pencil of writing on screen carries out the sensor of sensing can not weakened basically.
And because blooming 41 has the microstructure that forms with regular pattern in its surface, reflection of light can be effectively controlled by optimizing pattern dimension and distribution density, and can reduce the dazzle etc. of screen thus.
Can advantageously produce according to blooming of the present invention by the whole bag of tricks.Especially favourable production method is a transfer method.Transfer method can be implemented by variety of way.Single blooming can be made and be cut into to the blooming of long size continuously in downstream process, perhaps blooming can singly or become several ground to make.
And transfer method can adopt stamping technique to implement, or by with curable or coagulablely be used for molded material and insert the mode that mould hardens then and implement.Mould comprises metal pattern, sheet mould etc.
The preferred embodiments of the invention are that a kind of production comprises the transparent sheet-like substrate reaches the blooming of the transparent reflecting layer that forms on a side of this substrate method, this method comprises: after forming sheet form base, by shifting the step that forms the reflection horizon with a plurality of reflection distributive province on a side of substrate, wherein each distributive province comprises at least one microstructure.
Can preferably implement according to the method for blooming of the present invention with branch mode production according to the following step.
The making step of mould:
Making has support and the mould of the layer (hereinafter being also referred to as " shape extra play ") that is shaped, wherein be shaped to be placed on the support and to have microstructure on the shaping laminar surface and duplicate groove pattern, described groove has microstructure corresponding shape, height and the distribution density with face reflection distributive province.
The filling step that is used for molded material:
With curable or coagulablely be used for molded material arrangements in sheet form base be shaped between the layer and will be used for molded material and insert microstructure and duplicate groove.
The making step of blooming:
To be used for the sclerosis of molded material and comprise the blooming in sheet form base and reflection horizon, on the surface in this reflection horizon, be provided with the microstructure that is coupled integratedly with sheet form base with formation.
Step under the moving of blooming:
From mould, move down blooming.
Sheet form base can be supplied continuously or can supply singly from a volume substrate.
Blooming can be made by batch system, or the mode that the large-scale optics pad of being made up of many bloomings by making earlier then is cut into single blooming is made.
More particularly, aforesaid blooming production method can advantageously be implemented according to flow process shown in Figure 9 length by length.
At first, the mould 20 of preparation shown in Fig. 9 (A).Mould 20 has support 21 and the layer 22 that is shaped, the layer 22 that is shaped places on the support 21, and have microstructure and duplicate recessed poor 25 pattern on layer 22 surface that are shaped, described groove has microstructure corresponding shape, height and the distribution density with face reflection distributive province.For example, mould 20 can be made according to the following step:
Photocurable resin material is adhered on the metal die (duplicate of objective optics film), and the protrusion pattern of this mould has pattern corresponding shape and the size with the groove of mould 20, to form photocurable resin material layer;
To be attached to by the transparent support that plastic foil is formed on the metal die, to form the laminate of forming by metal die, photocurable resin material layer and support;
The support side of light from laminate is applied on the laminate, so that photocurable resin material layer solidifies; And
From mould, will move down with support by the shaping layer that photocurable resin material layer is solidified to form.
Transparent sheet-like substrate 1 is set on the pressing plate (not shown), and Rou Xing mould 20 is disposed in the precalculated position in the substrate 1 then, and carries out the calibration between substrate 1 and the mould 20.
Then, stacked roller 23 is placed on the end of mould 20.Stacked roller 23 is preferably rubber rollers.
At this moment, this end of mould 20 preferably is fixed in the substrate 1, because can prevent moving between calibrated substrate 1 and the mould 20.
Next, the free end of mould 20 is moved upwards up to stacked roller 23, lifts to expose substrate 1 with the support (not shown) simultaneously.At this moment, the stretching that can prevent mould 20 is to prevent that mould 20 is wrinkling and to keep aligning in mould 20 and the substrate 1.
After this, the plastic material (photocurable resin) that is used to make the necessary scheduled volume in reflection horizon is provided to substrate 1.For the presentation mode of plastic material, for example, can use the slurry loading hopper of band nozzle.
When the production method shown in implementing, plastic material 12 is not supplied in the whole substrate 1 equably.Plastic material 12 can only offer in the substrate 1 shown in Fig. 9 (A) part near stacked roller 23 because when following step with stacked roller 23 on mould 20 when mobile, plastic material 12 can evenly be laid in the substrate 1.In this situation, the viscosity of plastic material preferably is adjusted to and is suitable for such laying.The viscosity of plastic material is typically about 20,000cps or still less.And the method for supplying with plastic material is not limited to described method.For example, plastic material can be coated on the whole surface of substrate, and this is not illustrated.
Next, the rotary electric machine (not shown) is driven, and at a predetermined velocity stacked roller 23 is moved on mould 20, shown in Fig. 9 (A) arrow.During stacked roller 23 was so driven, by the weight of stacked roller 23, pressure was applied on the mould from the mould end to end continuously, and plastic material is laid between substrate 1 and the mould 20, and plastic material 12 is received in the groove 25 of mould 20.
And, shown in production method in, the groove of mould serves as the passage of air, so that captive air can be discharged into the outside of mould or on every side effectively by above-mentioned applied pressure in groove.As a result, in this production method,, can prevent that also bubble from remaining in the groove under atmospheric pressure even plastic material has been received in the groove.
Then, plastic material is hardened.In this step, because photocurable resin is used as the material of making the reflection horizon, the laminate of being made up of substrate 1 and mould 20 is placed in the ray radiation equipment (not shown), then light such as ultraviolet light (UV) is applied to plastic material 12 by substrate 1 and mould 20 and with its curing.Thus, obtain the microstructure 12 made by photocurable resin.At last, when the microstructure 12 that obtains is held when being adhered to substrate 1, substrate 1 and mould 20 are taken out from ray radiation equipment, and mould 20 is stripped from then, shown in Fig. 9 (C).In order to simplify, the blooming 10 of acquisition is shown as the state that microstructure 12 is adhered to sheet form base 1 integratedly, but in fact blooming 10 comprises by the reflection horizon made from microstructure 12 identical materials.And in the method that illustrates, blooming 10 is made by batch system, but they are also made or made by other method by the sheet form base 1 that provides from roller serially.
Advantageously, the blooming that has microstructure on the surface also can pass through to adopt the flame stamping technique to form.The flame stamping technique is a known little reproduction technology, wherein, the sheet form base of being made up of for example PET film contacts with the warm-up mill that has corresponding to the groove pattern of microstructure, with softening sheet form base and impress the pattern of microstructure in its surface, has so just finished the making of blooming.
The schematically illustrated employing flame of Figure 10 stamping technique is made the method for blooming 41 as shown in Figure 6 continuously.Blooming 41 can be made by be imported between hot padding roller 51 and the rubber roller 53 such mode at a predetermined velocity from sheet form base (for example, PET film) the volume 40 sheet form base films that send.Roller platen 51 is formed from steel and has the pattern of groove 52, and the pattern of groove 52 is corresponding with the pattern that will be attached to blooming 41 lip-deep microstructures 42.When the PET film by roller between the time, it is softened, and the pattern of microstructure 42 is transferred to its surface.
Embodiment
With reference to embodiments of the invention the present invention is described below.It should be noted that the present invention is not limited to these embodiment.
Embodiment 1
In this embodiment, made with reference to the blooming of Fig. 1 and Fig. 2 description.
100 parts of aliphatic urethane acrylate oligomer (Daicel UBC company limited by weight, commodity are called " Ebecryl270 "), 25 parts of acrylic acid phenoxy ethyl (KyoeishaChemical company limiteds, commodity are called " light acrylate PO-A ") and 1.25 parts of 2-hydroxy-2-methyl-1-phenyl-third-1-ketone (photo-induced polymerization initiators, Ciba Specialty Chemicals company, commodity are called " Darocure1173 ") the mixed resin that can solidify through UV that can form microstructure with preparation.
The sheet mould that preparation is made by acrylic resin, its surface engraving have and target prism-shaped microstructure corresponding groove pattern.
Then, the requirement that will be made by above-mentioned steps can and insert in the groove on the mould that the resin-coating that UV solidifies is being prepared.Then, polyester (PET) film that is used as substrate covers this mould.Employed PET film is the PET film (Teijin company, commodity are called " HPE188 ") with 100 μ m thickness in this step.
Next, under the state of the recess that can be received in this mould through the resin that UV solidifies, the fluorescent light that adopts Mitsubishi Electric Osram company limited is that 300 to 400nm light is applied to can be through last 30 second of resin that UV solidifies by the PET film with wavelength.Can be hardened and obtained the reflection horizon through the UV cured resin.Then, the PET film is stripped down from this mould with the reflection horizon, obtain objective optics film as depicted in figs. 1 and 2.In the blooming that obtains, the thickness in reflection horizon is about 300 μ m.The prism-shaped microstructure (quadrangular pyramid shape microstructure) that is formed at the surface, reflection horizon has the spacing (p) of 110 μ m and the height of 63 μ m.
Embodiment 2
In this embodiment, the reflection horizon of the blooming of embodiment 1 is stacked a protective finish.The perfluoro-polyether group that preparation is provided by following chemical formula and the fluorine containing silane coupling agent (Daikin company, commodity are called " Optool DSX ") of alkoxysilane groups are as the material of protective finish.
F-(CF 2CF 2CF 2O) n-Si (OMe) 3: 80 moles of %
F-(CF 2CF 2CF 2O) n-CF 2CF 3: 20 moles of %
The Me=methyl group
20 parts of silane coupling agents are by weight diluted with 80 parts of hydrogen fluorine ethers (3M company, commodity are called " HFE-7100 "), and it is a fluorine-containing reagent, with the preparation coating solution.Next, the blooming of embodiment 1 soaks in the coating solution that obtains, to form the protective finish of being made by silane coupling agent on the side of the reflection horizon of blooming.The thickness of protective finish is about 0.1 μ m, and the protected coating of prism-shaped microstructure on the reflection horizon all covers.
Embodiment 3(evaluation test)
In this embodiment,, (2) degree of reflection visual with regard to (1) to the characteristic of the blooming of embodiment 2 and (3) the easy degree aspect of wiping impression of the hand is estimated.And in order to compare with this blooming, (commodity are called " Tetron for 125 μ m thickness, Teijin company also to have prepared commercially available matt polyester (PET) film TM").
(1) visual test
After blooming (film of the present invention) and PET film (control film) are bonded on the picture display face of commercially available PDA, with these films of finger repeated friction separately the surface so that impression of the hand (sebum) spot be imprinted on these surfaces.
Next, open the PDA power supply, the visuality during the evaluation map picture shows qualitatively then.In the situation of film of the present invention, the light that is incident on film of the present invention surface is reflected along all directions by the surface of some prism-shaped microstructures, and spot such as the impression of the hand that invests film of the present invention surface thus becomes and is difficult to see clearly.That is, in the situation of film of the present invention, the existence of prism-shaped microstructure can suppress to make owing to spot the situation of the reduction of display performance, has therefore improved visuality.On the other hand, in the situation of control film, the spot such as impression of the hand is obvious, and this causes sense of discomfort.
(2) mirrored text
As visual test cases, blooming (film of the present invention) and PET film (control film) are bonded on the picture display face of commercially available PDA.
Next, PDA is directly placed under the room fluorescence and the place about 2m of this electrical distance, with the naked eye observes fluorescence from vergence direction and reflexes to degree the blooming.In the situation of film of the present invention, the light that is incident on the blooming surface is reflected along all directions by the surface of prism-shaped microstructure, thereby can prevent that fluorescence from reflexing in the film of the present invention.That is, in the situation of film of the present invention, the existence of prism-shaped microstructure can prevent the reduction of the visuality that causes to wherein reflection owing to the object around this film.On the other hand, in the situation of control film, can clearly observe fluorescence and reflect in this film.
(3) wipe the test of the easy degree of impression of the hand
As the situation of visuality test, blooming (film of the present invention) and PET film (control film) are bonded on the picture display face of commercially available PDA.In this test, also with the film of the present invention of the unprotect film of embodiment 1 and control film (on the control film the process according to embodiment 2 form protective finish with about 0.1 μ m thickness) be bonded on the PDA.
Next, be adhered to whole four kinds of sample film surfaces separately on the PDA with the finger repeated friction, so that impression of the hand (sebum) spot is imprinted on these surfaces.Towel off and wipe away each finger mark spot, qualitative evaluation is wiped the easy degree of impression of the hand.Usually can be observed the impression of the hand spot on film of the present invention with protective finish of being made by silane coupling agent and control film can be wiped well.
Next, in order to estimate the easy degree of wiping impression of the hand quantitatively, measure sample film surface energy separately according to contact angle.
Contact angle (number of degrees) adopts contact angle meter (Kyowa Kaimen Kagaku company, commodity are called " contact angle meter ") measured based on the desired method of JIS-R-3257 with the water of 0.05 μ l.Measurement result below obtaining.
The sample film Do not have Diaphragm Have Diaphragm
Blooming (film of the present invention) 105.4° 124.6°
PET film (control film) 70.4° 112.4°
Can understand from above-mentioned measurement result, have in the situation of protective finish at blooming according to the present invention, water resisting property and oil-proofness are improved, and can remove spot effectively such as impression of the hand.
As above describe in detail, the invention provides a kind of blooming, described blooming has improved visuality, and does not have the adhesion of impression of the hand, does not also have the infringement of contrast.This blooming can scratch-resistant etc. also prevents to adhere to dust etc., even and dust etc. adhered on this blooming, also can remove dust etc. very like a cork.Because blooming according to the present invention has characteristic like this, it can be used for various image displays effectively, especially can be advantageously used in input-output apparatus, and such as touch panel and graphic panel, described blooming is bonded on the described equipment.
And, the invention provides a kind of method that is easy to made with high precision according to blooming of the present invention.
And, the invention provides the image display of a kind of utilization according to the good characteristic of blooming of the present invention.

Claims (15)

1. blooming, described blooming comprises transparent reflectance coating, is provided with a plurality of reflection distributive province on the surface of described reflectance coating, and each described distributive province all comprises at least one microstructure.
2. blooming according to claim 1, described blooming comprises the transparent sheet-like substrate and is formed on transparent reflecting layer on described substrate one side, wherein said transparent reflecting layer is described reflectance coating, is provided with a plurality of reflection distributive province on the surface of described reflectance coating.
3. blooming according to claim 1, wherein said microstructure are the prism-shaped microstructure.
4. blooming according to claim 1, wherein said microstructure is arranged on the described reflectance coating with the pattern form of rule, and has reservation shape and predetermined altitude, and distributes with predetermined density.
5. blooming according to claim 1, wherein said reflectance coating is made by plastic material.
6. blooming according to claim 1 wherein forms protective finish on described reflectance coating.
7. blooming according to claim 1, described blooming is adhered on the picture display face of image display in the mode that the described reflectance coating side of this blooming is exposed.
8. blooming according to claim 7 when with pen with when pointing the described reflectance coating side contact described blooming, can directly be imported the input-output apparatus of described image display by described blooming.
9. method of producing blooming, described method comprise that wherein each described reflection distributive province all comprises at least one microstructure by through shifting a plurality of reflection distributive province being appended to the step that hyaline membrane one side is made reflectance coating.
10. method according to claim 9, wherein said reflectance coating are made into the form by the transparent reflecting layer of transparent sheet-like substrate support.
11. method according to claim 9 is wherein carried out the transfer of described reflection distributive province by stamping technique.
12. method according to claim 9 is wherein by with curable or coagulablely be used for molded material and insert mould, and will be described curable or coagulablely be used for molded material and harden and carry out described transfer of reflecting the distributive province.
13. method according to claim 10 said method comprising the steps of:
Preparation has support and the mould of the layer that is shaped, described shaping is placed on the described support and has microstructure on described shaping laminar surface duplicates groove pattern, and described microstructure is duplicated groove and had and described described microstructure corresponding shape, height and distribution density that reflects the distributive province;
With curable or coagulable be used for molded material arrangements between sheet form base and described shaping layer to be used for molded material and to insert described microstructure and duplicate in the groove with described;
Be used for the sclerosis of molded material and comprise the blooming in described sheet form base and reflection horizon described, on the surface in described reflection horizon, be provided with the microstructure that is coupled integratedly with described sheet form base with formation; And
From described mould, move down described blooming.
14. an image display, described image display comprise the blooming that is limited by claim 1 on the picture display face that places its image display panel.
15. image display according to claim 14, wherein said image display panel also comprises the touch panel that places under the described blooming.
CNA2004800156071A 2003-06-06 2004-04-20 Microstructured optical film and production process thereof Pending CN1802574A (en)

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