CN101253543A - Optical sheet for display and manufacturing method thereof - Google Patents

Optical sheet for display and manufacturing method thereof Download PDF

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Publication number
CN101253543A
CN101253543A CNA2006800315274A CN200680031527A CN101253543A CN 101253543 A CN101253543 A CN 101253543A CN A2006800315274 A CNA2006800315274 A CN A2006800315274A CN 200680031527 A CN200680031527 A CN 200680031527A CN 101253543 A CN101253543 A CN 101253543A
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China
Prior art keywords
optical sheet
lens
display
preparation
bonded
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CNA2006800315274A
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Chinese (zh)
Inventor
胜本隆一
永野英男
远藤惠介
中村善贞
竹田明彦
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Fujifilm Corp
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Fujifilm Corp
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Publication of CN101253543A publication Critical patent/CN101253543A/en
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Abstract

In a manufacturing method of the present invention, a diffusion sheet having a flat size of a product size or more is laminated to a front surface and/or back surface of a lens sheet having flat size of the product size or more, and the stack is cut along its periphery into the product size, and the lens sheet and the diffusion sheet are bonded to each other at at least one or more peripheral points thereof. This eliminates a step for individually cutting a number of films (sheets) into a product size, and a step for aligning the number of films (sheets) for lamination. In addition, the method does not cause a problem of waste of protective sheets, but provides advantages in both cost and quality. There is no problem caused in laminating a number of films, or problems caused by different thermal expansions/thermal shrinkages of a plurality of films.

Description

Optical sheet for display and preparation method thereof
Technical field
The present invention relates to a kind of optical display optical sheet and preparation method thereof, particularly, relate to a kind of preferably with than conventional method optical sheet for display and preparation method thereof of the sheet material layered product that in LCD, uses of simple steps and the preparation of lower cost more.
Background technology
In recent years, electronic console is equipped with such as LCD and organic EL: will be from the light diffusing film of light source such as plane optical table, or the lens coating that described light is converged previously to display.
Film is generally comprised within the wherein various bloomings (sheet) of lamination.For example, Japanese Patent Application Publication 2004-184575 (patent documentation 1) provides a kind of anti-(transflective) polarizing coating, in this film, reflective polarizer films, phase retardation film and saturating anti-layer be with not specific order lamination, and further will absorb (adsorptive) polarizing film and be pressed onto on described three layers.According to above-mentioned patent documentation 1, between light supply apparatus and liquid crystal display, insert 5 described contracureent transformation films, and this configuration improved screen intensity, and reduced power consumption.
Japanese Patent Application Publication 7-230001, Japanese patent registration 3123006 and Japanese Patent Application Publication 5-341132 (patent documentation 2 to 4) disclose a kind of film that has the function of light-diffusing film and lens coating simultaneously separately.
Summary of the invention
Yet in the conventional configuration of the film of above-mentioned patent documentation, a plurality of films of lamination need a lot of steps, and complicated step finally causes the increase of production cost.
Planar lens such as biconvex lens or prismatic lens have frangible and easy contaminated surface, and therefore when transporting, such planar lens is coated with screening glass usually to protect.
Yet these screening glass will remove from lens in use, and be dropped.Consider that from the viewpoint of the wasting of resources and production cost increase this is worthless.And this configuration need remove screening glass from planar lens step causes lower throughput rate like this.In addition, screening glass removed from planar lens produced electric charge, these electric charges trend towards pollutant is adhered on the planar lens such as dust and dirt, and consider that from the quality viewpoint this has produced other problem.
When a plurality of films of lamination (sheet), the friction during lamination, because the stress that causes of different thermal expansion/thermal shrinkages, the scratch when handling etc. cause the damage on film surface usually.
If,, need several operations usually, such as the thickness (for example, being used for the increase of rigidity) that increases each film then in order to correct fault owing to thermal expansion/thermal shrinkages different between the film produces fault (distortion, curl etc.).Therefore, the lamination of a plurality of films has disadvantage and is to have limited design, has increased production cost etc.
The present invention carries out in view of above-mentioned background, and an object of the present invention is to provide a kind of optical sheet for display and preparation method thereof, this optical sheet for display is preferably with than the conventional method sheet material layered product that uses in display device such as LCD of the quality preparation of simple steps, lower cost and Geng Gao more.
To achieve these goals, the invention provides a kind of optical sheet for display, it comprises: at least one has the lens of convex lens, described convex lens one axially on orientation, and the arrangement that on the whole surface of described lens, is adjacent to each other usually; And diffusion disk, described diffusion disk are in turn laminated on the front surface and/or rear surface of described lens, wherein said lens and diffusion disk on its at least more than one periphery point by bonded to each other.
In order to prepare above-mentioned optical sheet, the invention provides a kind of preparation method of optical sheet for display, described method comprises: lamination step, the diffusion disk that planar dimension is equal to or greater than product size is laminated on the front surface and/or rear surface of at least one lens, the planar dimension of described lens is equal to or greater than product size, and have convex lens, described convex lens one axially on the orientation and the arrangement that is adjacent to each other on the whole surface at described lens usually; Cutting step cuts into product size with the layered product of diffusion disk and lens along its periphery; And adhesion step, lens and diffusion disk is bonding on its at least more than one periphery point each other.
According to the present invention, the diffusion disk that planar dimension is equal to or greater than product size is laminated on the front surface and/or rear surface of lens that planar dimension is equal to or greater than product size, and this layered product is cut into product size along its periphery, then that lens and diffusion disk is bonded to each other at its at least more than one periphery point.
Therefore, eliminated the step that respectively a plurality of films (sheet) cut into product size and a plurality of films (sheet) are aimed to carry out the step of lamination.Method of the present invention does not produce the problem about screening glass, and the advantage that reduces cost and improve the quality is provided.And, when a plurality of film of lamination without any the problem such as top description problem, or because the caused problem of different heat expansion/thermal shrinkage of a plurality of films.
In view of above-mentioned advantage,, can prepare optical sheet for display with than conventional method more simple steps, lower cost and the quality of Geng Gao according to the present invention.
As using term herein " lens with convex lens, described convex lens one axially on the orientation and the arrangement that is adjacent to each other on the whole surface at described lens usually " comprise biconvex lens and prismatic lens, and diffraction grating etc.
As use herein, the planar dimension that term " planar dimension is equal to or greater than the sheet of product size " is meant lens or diffusion disk is not only greater than product size, and the planar dimension of lens or diffusion disk can be identical with product size.Under latter event, lens or diffusion disk can be no longer along its more than one edge cuts in cutting step.
To achieve these goals, the invention provides a kind of optical sheet for display, it comprises: two lens with convex lens, described convex lens one axially on the orientation and arrangements that be adjacent to each other on the whole surface at each lens usually, described two lens by each other with the direction lamination that spool intersects common right angle of described convex lens; And diffusion disk, described diffusion disk is in turn laminated on the front surface and/or rear surface of lens layered product, wherein said lens and described lens and diffusion disk on its at least more than one periphery point by bonded to each other.
In order to prepare above-mentioned optical sheet, the invention provides a kind of preparation method of optical sheet for display, described method comprises: lamination step, two planar dimensions are equal to or greater than product size and have the lens of convex lens, wherein said convex lens are the arrangement that is adjacent to each other on orientation and the whole surface at lens separately on axially, lamination is being so that axially the intersecting each other on general right angle of the convex lens on each sheet each other, and the diffusion disk that planar dimension is equal to or greater than product size is laminated on the front surface and/or rear surface of lens layered product; Cutting step cuts into product size with the layered product of diffusion disk and lens along its periphery; And adhesion step, lens and lens and diffusion disk is bonded to each other at its at least more than one periphery point.
According to the present invention, two lens are laminated into the front surface and/or the configuration on the rear surface that axially are laminated to described layered product each other with common right angle intersection and with diffusion disk that make at the convex lens on each sheet aforesaid various effect also is provided.Therefore, according to the present invention, can prepare optical sheet for display with than the more easy steps of conventional method, more low-cost and high-quality more.
Be positioned to the common right angle of one-tenth axial intersected with each other of the convex lens on each sheet although described lens by lamination, can slightly regulate described angle, to prevent Moire fringe (Moirefringe).
In the present invention, in adhesion step, preferably that lens and/or diffusion disk is melt bonded each other.Lens and/or diffusion disk can carry out bonding agent bonding (adhesively bonded), but preferred molten is bonding, because it has simplified adhesion step.By using hyperacoustic heat, using the heating of laser beam irradiation etc., can lens and/or diffusion disk is melt bonded.
In the present invention, in adhesion step, it is bonding that lens and/or diffusion disk preferably carry out bonding agent each other.It is bonding that lens and/or diffusion disk can carry out bonding agent by bonding agent and double-sided adhesive band.
In the present invention, cutting step and adhesion step are preferably carried out by the irradiation laser bundle usually simultaneously.Cutting can be passed through machining (for example, shearing (shirring) or punching press) and carry out, but laser beam (especially, the carbon dioxide gas volumetric laser) is suitable for the cutting of resin sheet, and considers from design (layout), also is favourable.In addition, the use of laser beam can make cutting step and adhesion step carry out simultaneously, like this preferred reduced step.
In the present invention, in adhesion step, preferably partly carry out bonding along its at least one peripheral edge lens and diffusion disk.In the present invention, in adhesion step, preferably that lens and lens and diffusion disk is bonding along its at least one peripheral edge part.This bonding of at least one peripheral edge part along layered product makes that layered product is fixed more firmly.
In the present invention, in adhesion step, preferably lens and diffusion disk are partly adhered to each other along its four peripheral edge.In the present invention, in adhesion step, preferably that lens and lens and diffusion disk is bonded to each other along its four peripheral edge parts.This bonding layered product that makes along four peripheral edge parts is fixed more firmly, and prevents that more effectively pollutant from entering into sheet such as dust.
In the present invention, lens and diffusion disk preferably have usually similarly thermal expansivity.Prevent the above-mentioned problem that causes owing to the different heat expansion/thermal shrinkage of film like this.
Particularly, the poor Δ α between the thermal expansivity of lens and the thermal expansivity of diffusion disk is preferably below 2%, more preferably below 1%, most preferably is below 0.05%.
To achieve these goals, the invention provides the optical sheet for display that a kind of wherein lamination has plural optical sheet, described optical sheet is bonded to each other at its at least more than one periphery point.
In order to prepare above-mentioned optical sheet, the invention provides a kind of preparation method of optical sheet for display, described method comprises: lamination step, the optical sheet that plural planar dimension is equal to or greater than the product size is lamination each other; Cutting step cuts into product size with the optical sheet layered product along its periphery; And adhesion step, the optical sheet layered product is bonded to each other at its at least more than one periphery point.
According to the present invention, two above planar dimensions are equaled the optical sheet lamination of product size, and this layered product is cut into product size along its periphery, and bonded to each other at its at least more than one periphery point.
Therefore, eliminated each a plurality of films (sheet) have been cut into the step of product size and the step of a plurality of films (sheet) aligning being carried out lamination.Method of the present invention does not produce the problem about screening glass, and the advantage that reduces cost and improve the quality is provided.And, when a plurality of film of lamination without any the problem such as top description problem, or because the caused problem of different heat expansion/thermal shrinkage of a plurality of films.
In view of above-mentioned advantage,, can prepare optical sheet for display with than conventional method more simple steps, lower cost and the quality of Geng Gao according to the present invention.
As use herein; term " optical sheet (blooming) " can be any sheet with optical function; (for example comprise diffusion disk, chip polarizer (polarizing coating) and various lens; biconvex lens, fly's-eye lens (fry eye lens), prismatic lens), and comprise the screening glass (diaphragm) that is used as optical element hardly.
In order to prepare above-mentioned optical sheet, the invention provides a kind of preparation method of optical sheet for display, described method comprises: at least one has the lens of convex lens, and described convex lens are the arrangement that is adjacent to each other on orientation and the whole surface at lens on axially; Be laminated to the front surface of described lens and/or the optical sheet of rear surface, wherein said lens and optical sheet are bonded to each other at its at least more than one periphery point.
In order to prepare above-mentioned optical sheet, the invention provides a kind of preparation method of optical sheet for display, described method comprises: lamination step, the optical sheet that planar dimension is equal to or greater than product size is laminated at least one planar dimension and is equal to or greater than product size and has on the front surface and/or rear surface of lens of convex lens, described convex lens one axially on the orientation and the arrangement that on the whole surface of lens, is adjacent to each other; Cutting step cuts into product size with the layered product of optical sheet and lens along its periphery; And adhesion step, lens and optical sheet is bonded to each other at its at least more than one periphery point.
According to the present invention, the optical sheet that planar dimension is equal to or greater than product size is laminated on the front surface and/or rear surface of lens that planar dimension is equal to or greater than product size, and this layered product is cut into product size along its periphery, then that lens and optical sheet is bonded to each other at its at least more than one periphery point.
Therefore, eliminated the step that respectively a plurality of films (sheet) cut into product size and a plurality of films (sheet) are aimed to carry out the step of lamination.Method of the present invention does not produce the problem about screening glass, and the advantage that reduces cost and improve the quality is provided.And, when a plurality of film of lamination without any the problem such as top description problem, or because the caused problem of different heat expansion/thermal shrinkage of a plurality of films.
In view of above-mentioned advantage,, can prepare optical sheet for display with than conventional method more simple steps, lower cost and the quality of Geng Gao according to the present invention.
" lens with convex lens, described convex lens are the arrangement that is adjacent to each other on orientation and the whole surface at lens on axially " comprises biconvex lens and prismatic lens as using term herein, and diffraction grating etc.
As using herein, term " planar dimension is equal to or greater than the sheet of product size " is meant the planar dimension of lens not only or optical sheet greater than product size, and the planar dimension of lens or optical sheet can be identical with product size.Under a kind of situation in back, lens or optical sheet can be no longer along its more than one edge cuts in cutting step.
To achieve these goals, the invention provides a kind of optical sheet for display, it comprises: two lens with convex lens, described convex lens are the arrangement that is adjacent to each other on orientation and the whole surface at lens separately on axially, described two lens each other lamination make convex lens on each sheet axially intersect each other into common right angle; And being laminated on the front surface of lens layered product and/or the optical sheet on the rear surface, wherein said two lens and lens and optical sheet are bonded to each other at its at least more than one periphery point.
In order to prepare above-mentioned optical sheet, the invention provides a kind of preparation method of optical sheet for display, described method comprises: lamination step, two planar dimensions are equal to or greater than product size and have the lens of convex lens, wherein said convex lens one axially on the orientation and the arrangement that is adjacent to each other on the whole surface at lens separately usually, what lamination made convex lens on each sheet each other axially intersects each other into common right angle, and the optical sheet that planar dimension is equal to or greater than product size is laminated on the front surface and/or rear surface of lens layered product; Cutting step cuts into product size with optical sheet and lens along its periphery; And adhesion step, lens and lens and optical sheet are bonded together on its at least more than one periphery point.
According to the present invention, two lens are laminated into the front surface and/or the configuration on the rear surface that axially are laminated to described layered product each other with common right angle intersection and with optical sheet that make at the convex lens on each sheet aforesaid various effect also is provided.Therefore, according to the present invention, can prepare optical sheet for display with than the more easy steps of conventional method, more low-cost and high-quality more.
Although described the common right angle of one-tenth axial intersected with each other that lens is laminated into convex lens on each sheet, can slightly regulate described angle, to prevent Moire fringe.
In the present invention, in adhesion step, preferably that lens and/or optical sheet is melt bonded each other.It is bonding that lens and/or optical sheet can carry out bonding agent, but preferred molten is bonding, because it has simplified adhesion step.By using hyperacoustic heat, using the heating of laser beam irradiation etc., lens and/or optical sheet can carry out melt bonded.
In the present invention, in adhesion step, it is bonding that lens and/or optical sheet preferably carry out bonding agent each other.It is bonding that lens and/or optical sheet can carry out bonding agent by bonding agent and double-sided adhesive band.
In the present invention, cutting step and adhesion step are preferably carried out by the irradiation laser bundle usually simultaneously.Cutting can be passed through machining (for example, shearing or punching press) and carry out, but laser beam (especially, the carbon dioxide gas volumetric laser) is suitable for the cutting of resin sheet, and considers from design, also is favourable.In addition, the use of laser beam can make cutting step and adhesion step carry out simultaneously, like this preferred reduced step.
In the present invention, in adhesion step, preferably partly carry out bonded to each other along its at least one peripheral edge optical sheet.In the present invention, in adhesion step, preferably that lens and optical sheet is bonding along its at least one peripheral edge part.
In the present invention, in adhesion step, preferably that lens and lens and optical sheet is bonded to each other along its at least one peripheral edge part.This bonding of at least one peripheral edge part along layered product makes that layered product is fixed more firmly.
In the present invention, in adhesion step, preferably that optical sheet is bonding along its four peripheral edge parts.In the present invention, in adhesion step, preferably that lens and optical sheet is bonding along its four peripheral edge parts.In adhesion step, preferably that lens and lens and optical sheet is bonding along its four peripheral edge parts.This bonding layered product that makes along four peripheral edge parts is fixed more firmly, and prevents that more effectively pollutant from entering such as dust.
In the present invention, lens and optical sheet preferably have usually similarly thermal expansivity.Prevent the above-mentioned problem that causes owing to the different heat expansion/thermal shrinkage of film like this.
Particularly, the poor Δ α between the thermal expansivity of lens and the thermal expansivity of optical sheet is preferably below 2%, more preferably below 1%, most preferably is below 0.05%.
In order to realize above-mentioned optical sheet, the invention provides a kind of optical sheet for display, it comprises: at least one lens, described lens planar dimension is equal to or greater than product size and has convex lens, described convex lens have usually similarly shape and usually on the whole surface of lens with the matrix form arrangement that is adjacent to each other; And optical sheet, the planar dimension of this optical sheet is equal to or greater than product size, and is in turn laminated on the front surface and/or rear surface of at least one lens, and wherein said lens and optical sheet are bonded to each other at its at least more than one periphery point.
In order to prepare above-mentioned optical sheet, the invention provides a kind of preparation method of optical sheet for display, described method comprises: lamination step, promptly, the optical sheet that planar dimension is equal to or greater than product size is laminated to planar dimension and is equal to or greater than product size and has on the front surface and/or rear surface of at least one lens of convex lens, described convex lens have usually similarly shape, and usually on the whole surface of lens with the matrix form arrangement that is adjacent to each other; Cutting step cuts into product size with the layered product of optical sheet and lens along its periphery; And adhesion step, optical sheet and lens is bonded to each other at its at least more than one periphery point.
According to the present invention, the optical sheet that planar dimension is equal to or greater than product size is laminated on the front surface and/or rear surface of lens that planar dimension is equal to or greater than product size, and layered product is cut into product size along its periphery, then with bonded to each other on its at least more than one periphery point of lens and optical sheet.
Therefore, eliminated each a plurality of films (sheet) have been cut into the step of product size and the step of a plurality of films (sheet) aligning being carried out lamination.Method of the present invention does not produce the problem about screening glass, and the advantage that reduces cost and improve the quality is provided.And, when a plurality of film of lamination without any the problem such as top description problem, or because the caused problem of different heat expansion/thermal shrinkage of a plurality of films.
In view of above-mentioned advantage,, can prepare optical sheet for display with than conventional method more simple steps, lower cost and the quality of Geng Gao according to the present invention.
As use herein; term " optical sheet (blooming) " can be any sheet with optical function; (for example comprise diffusion disk, chip polarizer (polarizing coating) and various lens; biconvex lens, fly's-eye lens (, prismatic lens), and comprise hardly screening glass (diaphragm) as optical element.
As use herein, term " optical sheet with convex lens, described convex lens have usually similarly shape usually and usually in the arrangement that is adjacent to each other with matrix form on the whole surface of lens " can be the lens that for example has the lens of semisphere fly's-eye lens or have conical convex lens on it on it.
In the present invention, convex lens preferably have coniform shape.Conical convex lens provide excellent optical property.As use herein, term " coniform shape " is meant the part in the space that is centered on by curved surface (or several flat surface), and comprise cone and pyramid, described curved surface by along each point of in the plane closed curve (or broken line) and in the plane the line between the point of fixity of side limit.
Therefore, the same with coniform shape, frustum-shaped also is preferred in the present invention.Frustum-shaped is meant by taking cone away obtain three dimensions along the plane cutting of the lower surface that is parallel to this cone and with the cutting part that this cone has its summit.For example, the rectangle frustum is meant by taking the quadrilateral pyramid away obtain three dimensions along the plane cutting of the lower surface that is parallel to this quadrilateral pyramid and the cutting part of cone that will have a summit of this quadrilateral pyramid.
In the present invention, optical sheet is preferably diffusion disk.Optical sheet for display with diffusion disk and said lens sheet will provide preferred optical property.
As using herein, the planar dimension that term " planar dimension is equal to or greater than the sheet of product size " is meant lens or diffusion disk not only can be greater than product size, and the planar dimension of lens or diffusion disk can be identical with product size.Under latter event, lens or diffusion disk can no longer cut along its more than one edge in cutting step.
In the present invention, in adhesion step, preferably that lens and/or optical sheet is melt bonded each other.It is bonding that lens and/or optical sheet can carry out bonding agent, but preferred molten is bonding, because it has simplified adhesion step.By using hyperacoustic heat, using the heating of laser beam irradiation etc., can carry out lens and/or optical sheet melt bonded.
In the present invention, in adhesion step, it is bonding that lens and/or optical sheet preferably carry out bonding agent each other.It is bonding that lens and/or optical sheet can carry out bonding agent by bonding agent and double-sided adhesive band.
In the present invention, cutting step and adhesion step are preferably carried out by the irradiation laser bundle usually simultaneously.Cutting can be passed through machining (for example, shearing or punching press) and carry out, but laser beam (especially, the carbon dioxide gas volumetric laser) is suitable for the cutting of resin sheet, and considers from design, also is favourable.In addition, the use of laser beam can make cutting step and adhesion step carry out simultaneously, like this preferred reduced step.
In the present invention, in adhesion step, preferably partly carry out bonding along its at least one peripheral edge lens and/or optical sheet.This bonding of at least one peripheral edge part along layered product makes that layered product is fixed more firmly.
In the present invention, in adhesion step, preferably that lens and/or optical sheet is bonded to each other along its four peripheral edge parts.This bonding layered product that makes along four peripheral parts is fixed more firmly, and prevents that more effectively pollutant from entering between the sheet such as dust.
In the present invention, lens and/or optical sheet preferably have usually similarly thermal expansivity.Prevent the above-mentioned problem that causes owing to the different heat expansion/thermal shrinkage of film like this.
Particularly, the poor Δ α between the thermal expansivity of lens and the thermal expansivity of optical sheet is preferably below 2%, more preferably below 1%, most preferably is below 0.05%.
Advantage of the present invention
As mentioned above, according to the present invention, can prepare optical sheet for display with than the more easy steps of conventional method, more low-cost and higher quality.
The accompanying drawing summary
Fig. 1 is the cross-sectional view that an embodiment of optical sheet for display is shown, and this optical sheet for display is by according to preparation method's preparation of the optical sheet for display of first aspect present invention;
Fig. 2 is the cross-sectional view of demonstration according to another embodiment of the optical sheet of first aspect present invention;
Fig. 3 is the cross-sectional view of demonstration according to another embodiment of the optical sheet of first aspect present invention;
Fig. 4 is the cross-sectional view of demonstration according to another embodiment of the optical sheet of first aspect present invention;
Fig. 5 is the cross-sectional view of demonstration according to another embodiment of the optical sheet of first aspect present invention;
Fig. 6 is the cross-sectional view of demonstration according to another embodiment of the optical sheet of first aspect present invention;
Fig. 7 is the figure that shows the configuration of the production line that is used for optical sheet for display, and described optical sheet for display has adopted the first, the 7th and the 13 preparation method;
Fig. 8 is the figure that shows the configuration of the production line that is used for optical sheet for display, and described optical sheet for display has adopted the second, the 8th and the 14 preparation method;
Fig. 9 is the figure that shows the configuration of the production line that is used for optical sheet for display, and described production line is applied to the 3rd, the 9th and the 15 preparation method;
Figure 10 is the figure that shows the configuration of the production line that is used for optical sheet for display, and described production line is applied to the 4th, the tenth and the 16 preparation method;
Figure 11 is the figure that shows the configuration of the production line that is used for optical sheet for display, and described production line is applied to the 5th, the 11 and the 17 preparation method;
Figure 12 is the figure that shows the configuration of the production line that is used for optical sheet for display, and described production line is applied to the 6th, the 12 and the 18 preparation method;
Figure 13 A and 13B illustrate that layered product is impacted the figure of the planar configuration of the sheet that in the first, the 7th and the 13 preparation method;
Figure 14 A and 14B illustrate that layered product is impacted the figure of the planar configuration of the sheet that in the second to the 6th, the the 8th to the 12 and the 14 to the 18 preparation method;
Figure 15 is the figure that shows the composition of the resin solution be used to prepare prismatic lens;
Figure 16 is the figure that shows the configuration of the device be used to prepare prismatic lens;
Figure 17 is the cross-sectional view that an embodiment of optical sheet for display is shown, and this optical sheet for display is by according to preparation method's preparation of the optical sheet for display of second aspect present invention;
Figure 18 is the cross-sectional view of demonstration according to another embodiment of the optical sheet of second aspect present invention;
Figure 19 is the cross-sectional view of demonstration according to another embodiment of the optical sheet of second aspect present invention;
Figure 20 is the cross-sectional view of demonstration according to another embodiment of the optical sheet of second aspect present invention;
Figure 21 is the cross-sectional view of demonstration according to another embodiment of the optical sheet of second aspect present invention;
Figure 22 is the cross-sectional view that an embodiment of optical sheet for display is shown, and this optical sheet for display is by according to preparation method's preparation of the optical sheet for display of third aspect present invention;
Figure 23 is the cross-sectional view of demonstration according to another embodiment of the optical sheet of third aspect present invention;
Figure 24 is the cross-sectional view of demonstration according to another embodiment of the optical sheet of third aspect present invention.
[description of Reference numeral]
10,20,30, the 40... optical sheet for display
12... first diffusion disk
14... first prismatic lens
16... second prismatic lens
18... second diffusion disk
110,120, the 130... optical sheet for display
112... first optical sheet
114... prismatic lens
116... second optical sheet
118... screening glass
210,220, the 230... optical sheet for display
212... first diffusion disk
214... prismatic lens
216... second diffusion disk
218... optical sheet
Implement best mode of the present invention
[first aspect]
Now, a first aspect of the present invention will be described with reference to the accompanying drawings.At first, to explain the several exemplary optical sheet for display (first to the 6th embodiment) for preparing by preparation method, will explain several preparation methods (first to the 6th preparation method) of these optical sheet for display then according to optical sheet for display of the present invention.
[embodiment of first aspect]
(first embodiment)
Fig. 1 is the cross-sectional view of a kind of configuration (first embodiment) that optical sheet for display is shown, and this optical sheet for display is by according to preparation method's preparation of optical sheet for display of the present invention.
Optical sheet for display 10 is assemblies of optical sheet, comprises: by the order that begins from the bottom, and first diffusion disk 12, first prismatic lens 14, second prismatic lens 16 and second diffusion disk 18 of lamination each other.
First diffusion disk 12 and second diffusion disk 18 are all made by hyaline membrane (substrate) separately, and have predetermined light diffusion character, and the surface of described hyaline membrane (substrate) (one of surface) is fixed with bead thereon by bonding agent.First diffusion disk 12 and second diffusion disk 18 have the bead of diameter that differs from one another (particle mean size) and different light diffusion character thereon.
Being used for each hyaline membrane (substrate) of first diffusion disk 12 and second diffusion disk 18 can be resin molding.Resin molding can be made by known materials, described known materials is such as tygon, polypropylene, Polyvinylchloride, poly-inclined to one side vinylidene chloride, polyvinyl acetate, polyester, polyolefin, acryl (acryl), polystyrene, polycarbonate, polyamide, PET (polyethylene terephthalate), biaxial stretch-formed polyethylene terephthalate, PEN, polyamidoimide, polyimide, aromatic poly amide, acrylic fibre element, cellulose triacetate, cellulose-acetate propionate and cellulose diacetate.In these, especially preferred polyester, acrylic fibre element, acryl, polycarbonate and polyolefin.
It is the bead that 100 μ m are following and preferred 25 μ m are following that first diffusion disk 12 and second diffusion disk 18 should have diameter.For example, can to have diameter be the bead of 17 μ m in preset range and the particle mean size of 7 to 38 μ m for first diffusion disk 12 and second diffusion disk 18.
First prismatic lens 14 and second prismatic lens 16 are the lens with convex lens, described convex lens one axially on the orientation and the arrangement that is adjacent to each other on the whole surface at lens separately usually.For example, lens can have the height of recessed-male structure of spacing, 25 μ m of 50 μ m and 90 ° drift angle (right angle).
Axially intersect each other into common right angle with what first prismatic lens 14 and second prismatic lens 16 were positioned to convex lens (prism) on each sheet.In other words, in Fig. 1, the axle of the convex lens on first prismatic lens 14 extends on the direction vertical with respect to paper, and the axle of the convex lens on second prismatic lens 16 extends on the horizontal direction with respect to paper.Yet in Fig. 1, the convex lens on second prismatic lens 16 show with the direction different with actual direction, make to can be understood as the xsect that second prismatic lens 16 has convex lens shape.
First prismatic lens 14 and second prismatic lens 16 can be made by any known preparation method by any known material.For example, can use the preparation method of resin sheet, in the method, resin material is extruded from die head, and this material is pushed between transferring roller (have pattern in its surface, this pattern is the opposite pattern of prismatic lens) and mip rolls, made the lip-deep pattern of transferring roller be transferred on the resin material, described transferring roller is with the speed rotation identical usually with the extruded velocity of resin material, and described mip rolls is with the transferring roller positioned opposite and with identical speed rotation.
Alternatively, can use the preparation method of resin sheet, in the method, the template (pressing mold) that will have pattern (this pattern is the opposite pattern of prismatic lens) in its surface is laminated on the resin plate by hot pressing, by hot transfer printing, this pattern pushed be formed on the resin plate.
The resin material that uses in these preparation methods can be thermoplastic resin, such as plexiglass (PMMA), polycarbonate resin, polystyrene resin, MS resin, AS resin, acrylic resin, polyvinyl resin, pet resin, Corvic (PVC), thermoplastic elastomer, and their multipolymer, and cyclic olefin polymer.
Alternatively, can use the preparation method of resin sheet, in the method, use recessed-protruding roller (to have pattern in its surface, this pattern is the opposite pattern of prismatic lens) recessed-convex pattern that will be in its surface is transferred on the surface of hyaline membrane (for example polyester, acrylic fibre element, acryl, polycarbonate, polyolefin), and the class types of the type of this hyaline membrane and the film that is used for first diffusion disk 12 and second diffusion disk 18 is seemingly.
More specifically, can use the preparation method of recessed-lug, in the method, bonding agent and resin are applied on the surface of hyaline membrane in turn, to obtain to have two films of adhesive phase and resin bed (for example UV cured resin) with the upper strata, and recessed-protruding roller that this hyaline membrane continues to move with around rotation is reeled, make the lip-deep recessed-convex pattern at recessed-protruding roller be transferred on the resin bed, and when reeling around recessed-protruding roller, resin bed is solidified (for example, by UV irradiation).Can not use bonding agent.
The preparation method of first prismatic lens 14 and second prismatic lens 16 is not limited to above-described those methods, can use on the surface of sheet, can form required recessed-other method of convex form.
As shown in Figure 1, at the right-hand member and the left end of optical sheet for display 10, form bonding zone 10A to connect described layer.In adhesion step, by formation bonding zone 10A such as carbon dioxide laser irradiations.
Optical sheet for display 10 for example is used for being arranged between the light supply apparatus and liquid crystal cells, forms liquid crystal indicator thus as a whole.Use under the situation of optical sheet for display 10, except various advantages recited above (can with than conventional method more simple steps, more low-cost and more high-quality prepare optical sheet for display), another kind of advantage also is provided, promptly can quite easily assembles this liquid crystal indicator.
(second embodiment)
Then, the another kind of optical sheet for display of preparing by preparation in accordance with the present invention (second embodiment) will be explained.Fig. 2 is the cross-sectional view that the configuration of optical sheet for display 20 is shown.Or similar elements identical with the element of Fig. 1 (first embodiment) uses similar Reference numeral to indicate in Fig. 2, and below will explain no longer in detail.
Optical sheet for display 20 comprises, by the order that begins from the bottom, and diffusion disk 12, first prismatic lens 14 and second prismatic lens 16 of lamination each other.Optical sheet for display 20 does not comprise second diffusion disk 18, because do not need to be similar to the diffusive properties that is used for wide zone of optical sheet for display 10.
As in the first embodiment, optical sheet for display 20 for example is used for being arranged between the light supply apparatus and liquid crystal cell, forms liquid crystal indicator thus as a whole.
(the 3rd embodiment)
Then, another optical sheet for display (the 3rd embodiment) of preparing by preparation in accordance with the present invention will be explained.Fig. 3 is the cross-sectional view that the configuration of optical sheet for display 30 is shown.Or similar elements identical with the element of the element of Fig. 1 (first embodiment) and Fig. 2 (second embodiment) uses similar Reference numeral to indicate in Fig. 3, and below will explain no longer in detail.
Optical sheet for display 30 comprises, with the order that begins from the bottom, and first diffusion disk 12 of lamination, prismatic lens 14 and second diffusion disk 18 each other.
Optical sheet for display 30 does not comprise second prismatic lens 16 because do not need to be similar to optical sheet for display 10 perpendicular to the diffusive properties on the direction of the paper of Fig. 2.
As in the first embodiment, optical sheet for display 30 for example is used for being arranged between the light supply apparatus and liquid crystal cell, forms liquid crystal indicator thus as a whole.
(the 4th embodiment)
Then, another optical sheet for display (the 4th embodiment) of preparing by preparation in accordance with the present invention will be explained.Fig. 4 is the cross-sectional view that the configuration of optical sheet for display 40 is shown.Or similar elements identical with the element of Fig. 1 (first embodiment), Fig. 2 (second embodiment) etc. uses similar Reference numeral to indicate in Fig. 4, and below will explain no longer in detail.
Optical sheet for display 40 comprises, with the order that begins from the bottom, and the diffusion disk 12 of lamination and prismatic lens 14 each other.Optical sheet for display 40 does not comprise second diffusion disk 18, because do not need to be similar to the diffusive properties that is used for wide zone of optical sheet for display 10, and it does not comprise second prismatic lens 16 because do not need to be similar to optical sheet for display 10 perpendicular to the diffusive properties on the direction of the paper of Fig. 4.
As in the first embodiment, optical sheet for display 40 for example is used for being arranged between the light supply apparatus and liquid crystal cell, forms liquid crystal indicator thus as a whole.
(the 5th embodiment)
Then, another optical sheet for display (the 5th embodiment) of preparing by preparation in accordance with the present invention will be explained.Fig. 5 is the cross-sectional view that the configuration of optical sheet for display 50 is shown.Or similar elements identical with the element of Fig. 1 (first embodiment), Fig. 2 (second embodiment) etc. uses similar Reference numeral to indicate in Fig. 5, and below will explain no longer in detail.
Optical sheet for display 50 comprises, with the order that begins from the bottom, and first prismatic lens 14, second prismatic lens 16 and the diffusion disk 18 of lamination each other.Optical sheet for display 50 does not comprise first diffusion disk 12, because do not need to be similar to the diffusive properties that is used for wide zone of optical sheet for display 10.
As in the first embodiment, optical sheet for display 50 for example is used for being arranged between the light supply apparatus and liquid crystal cell, forms liquid crystal indicator thus as a whole.
(the 6th embodiment)
Then, another optical sheet for display (the 6th embodiment) of preparing by preparation in accordance with the present invention will be explained.Fig. 6 is the cross-sectional view that the configuration of optical sheet for display 60 is shown.Or similar elements identical with the element of Fig. 1 (first embodiment), Fig. 2 (second embodiment) etc. uses similar Reference numeral to indicate in Fig. 6, and below will explain no longer in detail.
Optical sheet for display 60 comprises, with the order that begins from the bottom, and first prismatic lens 14 and the diffusion disk 18 of lamination each other.Optical sheet for display 60 does not comprise first diffusion disk 12, because do not need to be similar to the diffusive properties that is used for wide zone of optical sheet for display 10, and it does not comprise second prismatic lens 16 because do not need to be similar to optical sheet for display 10 perpendicular to the diffusive properties on the direction of the paper of Fig. 6.
As in the first embodiment, optical sheet for display 60 for example is used for being arranged between the light supply apparatus and liquid crystal cell, forms liquid crystal indicator thus as a whole.
[according to the preparation method of first aspect]
Now, several preparation methods (first to the 6th preparation method) that explanation are used for optical sheet for display.These preparation methods can be generally used for optical sheet for display 10 to 60, but for the purpose of simplifying the description, only describe the embodiment (first embodiment) of the optical sheet for display that wherein preparation method is applied to comprise four laminate layers.
(first preparation method)
Fig. 7 is the figure of configuration that shows the production line 11 of the optical sheet for display be applied to first preparation method.To reel around roller 12B, 14B, 16B and 18B respectively at first diffusion disk 12, first prismatic lens 14, second prismatic lens 16 and second diffusion disk 18 shown in Figure 1 at the left end of Fig. 7.
Roller 12B, 14B, 16B and 18B are supported by the turning axle of feedway (not shown) separately, and first diffusion disk 12, first prismatic lens 14, second prismatic lens 16 and second diffusion disk 18 can be supplied with by roller 12B, 14B, 16B and 18B respectively with identical generally speed.
After the supply, first diffusion disk 12, first prismatic lens 14, second prismatic lens 16 and second diffusion disk 18 are supported by deflector roll G respectively, with they in the upstream of laser head 24 lamination each other, described laser head 24 will below (lamination step) explanation.
Laser head 24 is included in the laser generator, and this device can be YAG laser irradiating device, the semiconductor laser irradiation device with 355 to 1064nm wavelength, the carbon dioxide laser irradiating device with 9 to 11 mum wavelengths etc.Laser can carry out irradiation with continuous laser beam or pulse laser beam, but when cutting simultaneously usually when melt bonded, uses the spot welding of pulse laser beam that excellent finished product (finish) is provided, thereby be preferred.
Normally cut the power of (cutting step) and melt bonded (adhesion step) needed laser beam and the size of frequency simultaneously and depend on the charging rate of sheet material, the sweep velocity of laser beam, the thickness of sheet material etc., but normally, under the condition of power that uses 2 to 50 W and the frequency below the 100kHz, can obtain good result.
Laser head 24 be installed to can X drive machines people (robot) that directions X (along the direction of sheet width) go up to move or can axle the XY drive machines people who moves on X and the Y direction on, and can be arranged on any position and can move along any track.Laser head 24 itself can move corresponding to the irradiation pattern of laser, but is separated to be provided with under the situation of (fix) at laser head 24, and only laser beam can be carried out waveguide by optical fiber, the feasible movement mechanism that can be reduced on the XY direction.
Can settle the known mechanisms (for example, aspiration device) that is used for the sucking-off cigarette, the generation the time of described cigarette by laser head 24 cutting and melt bonded described.
Laser head 24 with laser beam irradiation in the cutting and stick portion of the periphery of sheet layered product, and move irradiation hot spot on layered product with constant speed, so that layered product independent (along) can be cut into product size along its periphery, and simultaneously can be melt bonded along its periphery.
After above-mentioned steps is finished, formation optical sheet for display 10 (referring to, Fig. 1).Cutting and bonding optical sheet for display 10 are transported to conveyer 26, and sheet 10 is held in conveyer 26.The optical sheet for display 10 that is maintained on the conveyer 26 is held by horizontal transfer device 28, and piles up one by one on piling apparatus 32.
The layered product 34 that is stamped out from optical sheet for display 10 by laser head 24 is winding on the take up roll 36 of collecting device (not having to show in detail).
Preparation method (first preparation method) according to optical sheet for display obtains following effect 1 to 3.
1) effect of reduction damage and fault
Because the lensing of lens self, any damage on the preceding and rear surface of lens (first prismatic lens 14, second prismatic lens 16) all is obviously to lack (deficit).On the contrary, because only diffusion is therefore in the lip-deep any damage of the back of the body of diffusion disk (first diffusion disk 12, second diffusion disk 18) all not too obvious.Therefore, preventing of damaging on lens provides the damage that reduces optical sheet and the effect of fault.In the processing after the processing of lens, the damage on the lens often takes place, but in the combination of lens and diffusion disk, diffusion disk plays a part screening glass, reduces because of damaging caused fault like this.Especially, realize better in optical sheet for display 30 (see figure 3)s of this optical sheet for display 10 (see figure 1)s that act on first embodiment and the 3rd embodiment that in these two embodiments, lens does not expose as front surface.
2) effect of reduction number of assembling steps number
For example, in the assembling of liquid crystal indicator, under the situation of the optical sheet for display 10 that uses first embodiment, only need to settle a step of optical sheet for display 10, and under the situation of using conventional goods, need 8 steps: (i) installation of first diffusion disk; (ii) the back of the body screening glass of first lens peels off; (iii) the preceding screening glass of first lens peels off; The (iv) installation of first lens; (v) the back of the body screening glass of second lens peels off; (vi) the preceding screening glass of second lens peels off; (the vii) installation of second lens; (viii) and the installation of second diffusion disk.Therefore,, can significantly reduce the number of assembling steps number, reduce final production cost like this according to first preparation method.
3) effect of minimizing screening glass
Lens have usually adhere to before it and the lip-deep screening glass of the back of the body to prevent damage.After lens is installed, screening glass is abandoned, this is the huge waste of resource.In optical sheet for display according to the present invention, diffusion disk is used as screening glass, thereby has saved screening glass.
Particularly; in optical sheet for display 60 (see figure 6)s of optical sheet for display 40 (see figure 4)s of the 4th embodiment and the 6th embodiment, can save 1 screening glass; in optical sheet for display 30 (see figure 3)s of the 3rd embodiment, can save 2 screening glass; in optical sheet for display 50 (see figure 5)s of optical sheet for display 20 (see figure 2)s of second embodiment and the 5th embodiment, 3 screening glass can be saved, and in optical sheet for display 10 (see figure 1)s of first embodiment, 4 screening glass can be saved.
(second preparation method)
Now, the another kind of preparation method (second preparation method) of optical sheet for display will be explained.Fig. 8 is the figure of configuration that the production line 21 of the optical sheet for display that is applied to second preparation method is shown.Or similar elements identical with element in the production line 11 (first preparation method) of optical sheet for display in Fig. 7 uses similar Reference numeral to indicate in Fig. 8, and below will no longer describe in detail.
The production line 21 of optical sheet for display is equipped with divider 42,44 and 46 and decompressor 48, to replace the laser head 24 in the production line 11 of optical sheet for display.
Divider 42,44 and 46 is respectively from the supply of its each far-end releasing adhesive.Divider 42 is fed to bonding agent on the front surface of first diffusion disk 12, so that first diffusion disk 12 and first prismatic lens 14 are bonded together, divider 44 is fed to bonding agent the front surface of first prismatic lens 14, so that first prismatic lens 14 and second prismatic lens 16 are bonded together, and divider 46 is fed to the front surface of second prismatic lens 16 with bonding agent, so that second prismatic lens 16 and second diffusion disk 18 are bonded together.
The type that preferably under the help of heat or catalyzer, works of bonding agents from divider 42,44 and 46 supplies.Particularly, common bonding agent be can use, silicon adhesive, polyurethane binder, polyester binder, epoxy adhesive, cyanoacrylate adhesive and acrylic adhesives comprised.
Because optical sheet for display 10 to 60 may use at high temperature, so bonding agent is stable in the temperature of room temperature to 120 ° scope preferably.In those that enumerate, epoxy adhesive is preferably used because of their excellent in strength and thermotolerance in the above.Therefore cyanoacrylate adhesive is optimized for the efficient preparation of optical sheet for display owing to the snap action and the intensity of their excellences.Polyester binder is because their excellent in strength and processibility and preferred especially.
Bonding agent roughly can be divided three classes: heat curing class, hot melt class and binary liquid mixtures class, preferably use the bonding agent of heat curing class or hot melt class, because their allow the production and processing of continued operation.Regardless of the kind of employed bonding agent, the coating thickness of bonding agent all is preferably 0.5 μ m to 50 μ m.
Preferably, at the pressure roller (deflector roll G) of the arranged downstream of divider before, be provided for the drying mode of dry adhesive.Drying mode can be any known dry approach, does not have concrete restriction, such as with the drying of warm air or hot-air, with the drying of dehumidified air etc.
In the divider 42,44 and 46 each all be installed to can X drive machines people that directions X (along the direction of sheet width) go up to move or can axle the XY drive machines people who moves on X and the Y direction on, and can be arranged on any position and can move along any track.
Divider 42,44 and 46 is fed to the peripheral part of bonded layered product with bonding agent, so that layered product is when carrying, the pressure roller in divider 42,44 and 46 downstreams (deflector roll G) makes the peripheral part of layered product bonding.
Decompressor 48 is positioned at the downstream of divider 42,44 and 46, and layered product is cut into product size along its periphery.Decompressor 48 has cutting edge, and this cutting edge is placed into the center of the bonding peripheral part of layered product, impacting slice (optical sheet for display 10 to 60), thereby can obtain wherein in all sides only marginal portion or its bonded composite sheet in any selecteed side.
(the 3rd preparation method)
Now, explain another preparation method (the 3rd preparation method) of optical sheet for display.Fig. 9 is the figure of configuration that the production line 31 of the optical sheet for display that is applied to the 3rd preparation method is shown.In Fig. 9 with the production line 11 (first preparation method) of optical sheet for display in Fig. 7 and in Fig. 8 the identical or similar elements of the element in the production line 21 (second preparation method) of optical sheet for display use similar Reference numeral to indicate, and below will no longer describe in detail.
Be equipped with adhesive tape distributor 52,54 and 56 on the production line 21 of optical sheet for display, to replace the divider 42,44 and 46 in the production line 21 of optical sheet for display.Adhesive tape distributor 52,54 and 56 is respectively from its each far-end supply double sticky tape.
Adhesive tape distributor 52 is supplied to double sticky tape the front surface of first diffusion disk 12, so that first diffusion disk 12 and first prismatic lens 14 are bonded together, adhesive tape distributor 54 is fed to double faced adhesive tape the front surface of first prismatic lens 14, so that first prismatic lens 14 and second prismatic lens 16 are bonded together, and adhesive tape distributor 56 is fed to the front surface of second prismatic lens 16 with double sticky tape, so that second prismatic lens 16 and second diffusion disk 18 are bonded together.
All have separately by the double sticky tapes of adhesive tape distributor 52,54 and 56 supplies and to be coated with the preceding of glue reagent and back of the body surface.For example, the glue reagent that is used for double sticky tape can be the acrylic copolymer resin of high adherence matter, and the glue reagent of silica-based, natural rubber based, synthetic rubber base, and from comprising thermotolerance and considerations such as anti-wriggling, cost, integrated optimization acrylic compounds glue reagent.
The adhesive tape distributor 52,54 and 56 that is used to supply double sticky tape can be any general adhesive tape dispenser that is purchased.Adhesive tape distributor 52,54 and 56 is installed in the single shaft travel mechanism separately, and can change the position placing double sticky tape corresponding to impacting pattern, and described single shaft travel mechanism can move to the optional position in directions X (along the direction of sheet width).
Adhesive tape distributor 52,54 and 56 is all fixed by the fixed part with hinge mechanism separately, each adhesive tape distributor 52,54 that described hinge mechanism changes and the sheet charging rate is synchronous and 56 position are to be placed on double sticky tape on the direction with respect to the inclination of adhesive tape mobile route.
Decompressor 48 is positioned at the downstream of adhesive tape distributor 52,54 and 56, and layered product is cut into product size along its periphery.Decompressor 48 has cutting edge, and this cutting edge is placed into the center of the bonding peripheral part of layered product, impacting slice (optical sheet for display 10 to 60), thereby can obtain wherein in all sides only marginal portion or its bonded composite sheet in any selecteed side.
(the 4th preparation method)
Now, explain another preparation method (the 4th preparation method) of optical sheet for display.Figure 10 is the figure of configuration that the production line 41 of the optical sheet for display that is applied to the 4th preparation method is shown.In Figure 10 with the production line 11 (first preparation method) of optical sheet for display in Fig. 7, in Fig. 8 optical sheet for display production line 21 (second preparation method) and in Fig. 9 the identical or similar elements of the element in the production line 31 (the 3rd preparation method) of optical sheet for display use similar Reference numeral to indicate, and below will no longer describe in detail.
The production line 21 of optical sheet for display is equipped with ultrasonic amplitude transformer (ultrasonic homs) 62,64 and 66, to replace the divider 42,44 and 46 in the production line 21 of optical sheet for display.In the ultrasonic amplitude transformer 62,64 and 66 each all is positioned at the downstream of pressure roller (deflector roll G).
Ultrasonic amplitude transformer 62,64 and 66 makes plural laminate melt bonded each other.Ultrasonic amplitude transformer 62 makes first diffusion disk 12 and first prismatic lens 14 melt bonded each other, ultrasonic amplitude transformer 64 makes first prismatic lens 14 and second prismatic lens 16 melt bonded each other, and ultrasonic amplitude transformer 66 makes second prismatic lens 16 and second diffusion disk 18 melt bonded each other.
Those that have the ultrasonic amplitude transformer (ultrasonic bonds device) of the cylinder that is used to promote the luffing bar or have the servomotor that is used to promote the luffing bar are known in the prior art, but ultrasonic amplitude transformer 62,64 and 66 can be can when sheet applies load by apply the ultrasonic bonds device that ultrasonic vibration makes the melt bonded each other any type of this sheet to sheet.
When sheet is impacted with the horizontal mode with respect to the sheet feedstock direction, control ultrasonic amplitude transformer 62,64 and 66 is to change their positions on the sheet Width, and when sheet is hit with the vergence direction with respect to the sheet feedstock direction, ultrasonic amplitude transformer 62,64 and 66 need to be installed the mechanism that can swing to change the moving direction of each ultrasonic amplitude transformer 62,64 and 66, makes to move on the sheet Width with the synchronous mode of sheet displacement.
Ultrasonic amplitude transformer 62,64 and 66 can be provided under any condition works, short of stick portion gets final product because of heat fused ftractures, and when needing, can settle cooling body, with after sheet connects, by connection (melt bonded) part of cooling fins such as blowing.
Decompressor 48 is positioned at the downstream of ultrasonic amplitude transformer 62,64 and 66.Decompressor 48 has cutting edge, and this cutting edge is placed into the center of the bonding peripheral part of layered product, impacting slice (optical sheet for display 10 to 60), thereby can obtain wherein in all sides only marginal portion or its bonded composite sheet in any selecteed side.
(the 5th preparation method)
Now, explain another preparation method (the 5th preparation method) of optical sheet for display.Figure 11 is the figure of configuration that the production line 51 of the optical sheet for display that is applied to the 5th preparation method is shown.In Figure 11, with the production line 11 (first preparation method) of optical sheet for display in Fig. 7, the identical or similar elements of production line 21 (second preparation method), the element in Fig. 9 in the production line 31 (the 3rd preparation method) etc. of optical sheet for display of optical sheet for display uses similar Reference numeral to indicate in Fig. 8, and below will no longer describe in detail.
The production line 51 of optical sheet for display is equipped with laser head 72,74 and 76, to replace the ultrasonic amplitude transformer 62,64 and 66 in the production line 41 of optical sheet for display.Similar with ultrasonic amplitude transformer 62,64 and 66, laser head 72,74 and 76 lays respectively at the downstream of pressure roller (deflector roll G).
Also similar with ultrasonic amplitude transformer 62,64 and 66, laser head 72,74 and 76 makes plural laminate melt bonded each other.That is, laser head 72 makes first diffusion disk 12 and first prismatic lens 14 melt bonded each other, and laser head 74 makes first prismatic lens 14 and second prismatic lens 16 melt bonded each other, and the laser head 76 and second prismatic lens 16 and second diffusion disk 18 are melt bonded each other.
Different with the laser head 24 in the production line 11 (first preparation method) of optical sheet for display in Fig. 7,72,74 and 76 of laser heads use in adhesion step, and decompressor 48 uses in cutting step.Yet laser head 72,74 and 76 keystone specification and peripheral structure and in first preparation method those are similar usually.
Laser head 72,74 and 76 can be provided under any condition works, short of stick portion gets final product because of heat fused ftractures, and when needing, can settle cooling body, with after sheet connects, by connection (melt bonded) part of cooling fins such as blowing.
Decompressor 48 is positioned at the downstream of laser head 72,74 and 76.Decompressor 48 has cutting edge, and this cutting edge is placed into the center of the bonding peripheral part of layered product, impacting slice (optical sheet for display 10 to 60), thereby can obtain wherein in all sides only marginal portion or its bonded composite sheet in any selecteed side.
(the 6th preparation method)
Now, another preparation method (the 6th preparation method) of optical sheet for display will be explained.Figure 12 is the figure of configuration that the production line 61 of the optical sheet for display that is applied to the 6th preparation method is shown.In Figure 12 with the production line 11 (first preparation method) of optical sheet for display in Fig. 7, in Fig. 8 optical sheet for display production line 21 (second preparation method) and in Fig. 9 the identical or similar elements of the element in the production line 31 (the 3rd preparation method) etc. of optical sheet for display use similar Reference numeral to indicate, and below will no longer describe in detail.
The production line 61 of optical sheet for display is equipped with 1 laser head 78, to replace three laser heads 72,74 and 76 in the production line 51 of optical sheet for display.Laser head 78 is positioned at the downstream of pressure roller (deflector roll G).
Laser head 78 makes plural laminate melt bonded each other.That is it is melt bonded that, laser head 78 makes the layered product of first diffusion disk 12, first prismatic lens 14, second prismatic lens 16 and second diffusion disk 18.
Different with the laser head 24 in the production line 11 of optical sheet for display in Fig. 7,78 of laser heads use in adhesion step, and and decompressor 48 in cutting step, use.Yet the keystone specification of laser head 78 and peripheral structure and in first preparation method those are similar usually.
Laser head 78 can be provided under any condition and work, and short of stick portion gets final product because of heat fused ftractures, and when needing, can settle cooling body, with after sheet connects, by connection (melt bonded) part of cooling fins such as blowing.
Decompressor 48 is positioned at the downstream of laser head 78.Decompressor 48 has cutting edge, and this cutting edge is placed into the center of the bonding peripheral part of layered product, impacting slice (optical sheet for display 10 to 60), thereby can obtain wherein in all sides only marginal portion or its bonded composite sheet in any selecteed side.
Then, the planar configuration of impacting the sheet (optical sheet for display 10 to 60) that from the layered product of first diffusion disk 12, first prismatic lens 14, second prismatic lens 16 and second diffusion disk 18 will be explained.
Figure 13 A and 13B are that explanation is impacted the figure of the planar configuration of the sheet (optical sheet for display 10 to 60) that by the layered product in first preparation method, and Figure 14 A and 14B are the figure that is impacted the planar configuration of the sheet (optical sheet for display 10 to 60) that by the layered product in second to the 6th preparation method.
Figure 13 A is presented to be transferred with respect to this layered product and finishes melt bonded (adhesion step) on the parallel direction of direction and impact (cutting step) layered product afterwards, and Figure 13 B is presented on the vergence direction with respect to the throughput direction of this layered product and finishes melt bonded (adhesion step) and impact (cutting step) layered product afterwards.In Figure 13 A and 13B, be melt bonded point along the point of the peripheral edge of impacting the sheet that by layered product.
Figure 14 A is presented to be transferred with respect to this layered product and finishes melt bonded on the parallel direction of direction or adhere to (adhesion step) layered product afterwards, and Figure 14 B is presented at and finishes melt bonded on the vergence direction with respect to the throughput direction of this layered product or adhere to (adhesion step) layered product afterwards.In Figure 14 A and 14B, be point melt bonded or that adhere to along the point of the peripheral edge of impacting the sheet that by layered product.
As mentioned above, according to first aspect present invention, optical sheet for display can be with than the more quality preparation of simple steps, lower cost and Geng Gao of conventional method.
And, according to first aspect present invention, obtained following effect 1 and 2.
1) by realizing the cost reduction and hanging down section (low profile), increased value of the product
Because optical sheet need be rigidity so that in large-sized liquid crystal display television, use, the thickness that therefore normally is used for the substrate of each sheet is about twice of typical substrates thickness.Yet because the optical sheet according to the present invention compound that is sheet, so optical sheet has sufficient rigidity under the situation of the thickness that does not increase each sheet, and can comprise the lamella that its thickness is lowered.
2) by preventing the reduction of focusing effect, to improve performance
In order to prevent (making not obvious) damage on lens, some products have hacking (mattefinish) back of the body surface.According to optical sheet of the present invention needs blast sanded surface not, thereby reduced production cost, and prevented to have improved performance like this according to optical sheet of the present invention because the caused focusing effect of blast sanded surface reduces.
Although explained according to the preparation method's of the optical sheet for display of first aspect present invention exemplary, should be appreciated that the present invention is not limited to above-mentioned embodiment, and wherein can increase various modifications and variation.
For example, in all above-mentioned embodiments, first prismatic lens 14 and second prismatic lens 16 have supine prism, but first prismatic lens 14 and second prismatic lens 16 can the ventricumbent prisms of lamination.
The layer structure of optical sheet for display is not limited to those in above-mentioned exemplary, and for example, screening glass can be laminated on the top and/or lower surface of sheet.
Optical sheet for display with this structure is operated in the mode identical with above-mentioned embodiment, and produces similar effect.
[second aspect]
Now, will explain a second aspect of the present invention with reference to the accompanying drawings.At first, to explain several exemplary display devices optical sheet (the 7th to the 11 embodiment) for preparing by preparation method, will explain several preparation methods (the 7th to the 12 preparation method) of these optical sheet for display then according to optical sheet for display of the present invention.
[embodiment of second aspect]
(the 7th embodiment)
Figure 17 is the cross-sectional view that shows the optical sheet for display (the 7th embodiment) for preparing by the preparation method according to optical sheet for display of the present invention.
Optical sheet for display 110 is that the assembly of optical sheet comprises, by the order that begins from the bottom, each other by first optical sheet 112 of lamination, prismatic lens 114 and second optical sheet 116.First optical sheet 112 and second optical sheet 116 can be reflecting polarizer, diffusion disk, transparent optical sheet (for example PET, TAC) etc.
Prismatic lens 114 is the lens with convex lens, described convex lens one axially on the orientation and the arrangement that is adjacent to each other on the whole surface at this lens usually.For example, lens can have the spacing of 50 μ m, the convex portion drift angle (right angle) of the height of recessed-male structure of 25 μ m and 90 °.
Axial and this sheet that prismatic lens 114 is positioned to the convex lens (prism) on sheet intersects common right angle.In other words, in Figure 17, the axle of the convex lens on the prismatic lens 114 extends on the direction vertical with respect to paper.
Prismatic lens 114 can be by making with the material of the materials similar of first prismatic lens 14 that is used for first aspect (first embodiment) and second prismatic lens 16, and can use the similar method preparation of method with first prismatic lens 14 and second prismatic lens 16 of first aspect (first embodiment).
As shown in figure 17, at the right-hand member and the left end of optical sheet for display 110, form bonding zone 110A with articulamentum.In adhesion step, by formation bonding zone 110A such as carbon dioxide laser irradiations.
Above-mentioned optical sheet for display 110 for example is used for being arranged between the light supply apparatus and liquid crystal cells, forms liquid crystal indicator thus as a whole.Use under the situation of optical sheet for display 110, except various advantages recited above (can with than conventional method more simple steps, more low-cost and more high-quality prepare optical sheet for display), another kind of advantage also is provided, promptly can quite easily assembles this liquid crystal indicator.
(the 8th embodiment)
Then, explain the another kind of optical sheet for display of preparing by preparation in accordance with the present invention (the 8th embodiment).Figure 18 is the cross-sectional view that the structure of optical sheet for display 120 is shown.Or similar elements identical with the element of Figure 17 (first embodiment) uses similar Reference numeral to indicate in Figure 18, and below will explain no longer in detail.
Optical sheet for display 120 comprises, by the order that begins from the bottom, and second prismatic lens 115 of lamination and first prismatic lens 114 each other.The optical sheet that is used to show 110 as previously described, optical sheet for display 120 comprise second prismatic lens 115, and reason is not only on 1 (X-axis) direction but also need to be used for the diffusive properties in wide zone on another (Y-axis) direction.Can their flat surfaces be faced with each other second prismatic lens 115 and first prismatic lens, 114 back-to-back laminations.
Settle first prismatic lens 114 and second prismatic lens 115, what make convex lens (prism) on each sheet axially intersects each other into common right angle.In other words, in Figure 18, the axle of the convex lens on first prismatic lens 114 extends on the vertical direction with respect to paper, and the axle of the convex lens on second prismatic lens 115 extends on the horizontal direction with respect to paper.Yet in Figure 18, the convex lens on second prismatic lens 115 show with the direction different with actual direction, make to can be understood as the xsect that second prismatic lens 115 has convex lens shape.
As in the 7th embodiment, above-mentioned optical sheet for display 120 for example is used for being arranged between the light supply apparatus and liquid crystal cells, forms liquid crystal indicator thus as a whole.
(the 9th embodiment)
Then, another optical sheet for display (the 9th embodiment) of preparing by preparation in accordance with the present invention will be explained.Figure 19 is the cross-sectional view that the structure of optical sheet for display 130 is shown.
Optical sheet for display 130 comprises, by the order that begins from the bottom, and first diffusion disk 113 of lamination and second diffusion disk 117 each other.
When for the character that replaces the direction diffusion in described optical sheet for display 110 or the optical sheet for display 120 in the above, when needing isotropic diffusion character, use optical sheet for display 130.
First diffusion disk 113 and second diffusion disk, 117 each free hyaline membrane (substrate) are made, and have predetermined light diffusion character, and described hyaline membrane (substrate) has the surface (one of described surface) that bead is arranged by adhesive thereon.First diffusion disk 113 and second diffusion disk 117 have the bead of the diameter (particle mean size) that differs from one another and different light diffusion character thereon.
Being used for each hyaline membrane (substrate) of first diffusion disk 113 and second diffusion disk 117 can be resin molding.Resin molding can be made by known materials, described known materials is such as tygon, polypropylene, Polyvinylchloride, poly-inclined to one side vinylidene chloride, polyvinyl acetate, polyester, polyolefin, acryl, polystyrene, polycarbonate, polyamide, PET (polyethylene terephthalate), biaxial stretch-formed polyethylene terephthalate, PEN, polyamidoimide, polyimide, aromatic poly amide, acrylic fibre element, cellulose triacetate, cellulose-acetate propionate and cellulose diacetate.In these, especially preferred polyester, acrylic fibre element, acryl, polycarbonate and polyolefin.
It is the bead that 100 μ m are following, preferred 25 μ m are following that first diffusion disk 113 and second diffusion disk 117 should have diameter.For example, first diffusion disk 113 and second diffusion disk 117 can have diameter within the preset range of 7 to 38 μ m and particle mean size be the bead of 17 μ m.
As in the 7th embodiment, above-mentioned optical sheet for display 130 for example is used for being arranged between the light supply apparatus and liquid crystal cells, forms liquid crystal indicator thus as a whole.
(the tenth embodiment)
Then, another optical sheet for display (the tenth embodiment) of preparing by preparation in accordance with the present invention will be explained.Figure 20 is the cross-sectional view that the structure of optical sheet for display 140 is shown.
Optical sheet for display 140 comprises, by the order that begins from the bottom, and the diffusion disk 117 of lamination and optical sheet 116 each other.Optical sheet 116 can be polarizer.
As in the 7th embodiment, above-mentioned optical sheet for display 140 for example is used for being arranged between the light supply apparatus and liquid crystal cells, forms liquid crystal indicator thus as a whole.
(the 11 embodiment)
Then, another optical sheet for display (the 11 embodiment) of preparing by preparation in accordance with the present invention will be explained.Figure 21 is the cross-sectional view that the structure of optical sheet for display 150 is shown.
Optical sheet for display 140 comprises, by the order that begins from the bottom, and the prismatic lens 114 of lamination and optical sheet 116 each other.Optical sheet 116 can be polarizer.
As in the 7th embodiment, above-mentioned optical sheet for display 150 for example is used for being arranged between the light supply apparatus and liquid crystal cells, forms liquid crystal indicator thus as a whole.
[preparation method of second aspect]
Now, several preparation methods (the 7th to the 12 preparation method) that explanation are used for optical sheet for display.But these preparation methods can be normally used for optical sheet for display 110 to 150 for the purpose of simplifying the description, will only explain that preparation method wherein is applied to containing the embodiment of the optical sheet for display of four laminate layers.This optical sheet for display that contains four laminate layers can be the optical sheet for display 110 that has added screening glass 118 on (top) surface of for example the 7th embodiment.
(the 7th preparation method)
Fig. 7 is the figure (using Fig. 7 to explain that the production line 111 of optical sheet for display, reason are that production line 111 is constructed in the mode identical with the production line that is used for optical sheet for display 11 of first aspect usually) of structure that the production line 111 of the optical sheet for display that is applied to the 7th preparation method is shown. Roller 112B, 114B, 116B and 118B at Fig. 7 left end will roll at first optical sheet 112 shown in Figure 17, prismatic lens 114, second optical sheet 116 and above-mentioned screening glass 118 respectively.
Roller 112B, 114B, 116B and 118B are supported by the turning axle of feedway (not shown) separately, and first optical sheet 112, prismatic lens 114, second optical sheet 116 and screening glass 118 can be with identical usually speed respectively by roller 112B, 114B, 116B and 118B supplies.
After supplying with, first optical sheet 112, prismatic lens 114, second optical sheet 116 and screening glass 118 are supported by deflector roll G respectively, with they in the upstream of laser head 124 lamination each other, described laser head 124 will below (lamination step) explanation.
Laser head 124 is included in the laser-beam generating apparatus, this device can dispose in the mode identical with the laser head 24 of first aspect, and the preparation process of using this laser-beam generating apparatus to prepare optical sheet for display can be carried out in the mode identical with first aspect.
According to this preparation method (the 7th preparation method) of optical sheet for display, as in first aspect, obtain three advantages (that is, reducing the effect of the effect of damage and fault, the effect that reduces the number of assembling steps number and minimizing screening glass).
For example; for the effect that reduces screening glass; in the optical sheet for display 150 (seeing Figure 21) of the 11 embodiment, can save 1 screening glass that is used for prismatic lens 114; in the optical sheet for display 110 (seeing Figure 17) of the 7th embodiment; can save 2 screening glass that are used for prismatic lens 114; and in the optical sheet for display 120 (seeing Figure 18) of the 8th embodiment, can save 2 screening glass that are used for prismatic lens 114 and 115.
(the 8th preparation method)
Then, will another preparation method (the 8th preparation method) of optical sheet for display be described.Fig. 8 is the figure (using Fig. 8 to explain that the production line 121 of optical sheet for display, reason are that production line 121 is constructed in the mode identical with the production line that is used for optical sheet for display 21 of first aspect usually) of structure that the production line 121 of the optical sheet for display that is applied to the 8th preparation method is shown.Or similar elements identical with element in the production line 111 (the 7th embodiment) of optical sheet for display indicated with similar Reference numeral in the production line 121 of optical sheet for display, and will explain no longer in detail below.
The production line 121 of optical sheet for display is equipped with divider 142,144 and 146 and decompressor 148, to replace the laser head 124 in the production line 111 of optical sheet for display.
Divider 142,144 and 146 is respectively from the supply of its each far-end releasing adhesive.Divider 142 is supplied to bonding agent the front surface of first optical sheet 112; with being bonded together with first optical sheet 112 and prismatic lens 114; divider 144 is supplied to bonding agent the front surface of prismatic lens 114; so that the prismatic lens 114 and second optical sheet 116 are bonded together; divider 146 is supplied to the front surface of second prismatic lens 116 with bonding agent, so that second prismatic lens 116 and screening glass 18 are bonded together.
Production line 121 at the optical sheet for display that is used for having above-mentioned structure can prepare optical sheet for display as first aspect.
(the 9th preparation method)
Then, another preparation method (the 9th preparation method) of optical sheet for display will be explained.Fig. 9 is the figure (using Fig. 9 to explain that the production line 131 of optical sheet for display, reason are that production line 131 is constructed in the mode identical with the production line that is used for optical sheet for display 31 of first aspect usually) of structure that the production line 131 of the optical sheet for display that is applied to the 9th preparation method is shown.Or similar elements identical with element in the production line 121 (the 8th embodiment) of the production line 111 (the 7th embodiment) of optical sheet for display and optical sheet for display indicated with similar Reference numeral in the production line 131 of optical sheet for display, and will explain no longer in detail below.
The production line 131 of optical sheet for display is equipped with adhesive tape distributor 152,154 and 156, to replace the divider 142,144,146 in the production line 121 of optical sheet for display.Adhesive tape distributor 152,154 and 156 is respectively from its each far-end supply double sticky tape.
Adhesive tape distributor 152 is supplied to double sticky tape the front surface of first optical sheet 112; so that first optical sheet 112 and prismatic lens 114 are bonded together; adhesive tape distributor 154 is supplied to double sticky tape the front surface of prismatic lens 114; so that the prismatic lens 114 and second optical sheet 116 are bonded together; and adhesive tape distributor 156 is supplied to the front surface of second optical sheet 116 with double sticky tape, so that second optical sheet 116 and screening glass 118 are bonded together.
Other structure of the production line 131 of optical sheet for display is similar to the structure in the production line 31 of the optical sheet for display of first aspect, thereby below will explain no longer in detail.
In the production line 131 of optical sheet for display, can as in first aspect, prepare optical sheet for display with above-mentioned structure.
(the tenth preparation method)
Then, another preparation method (the tenth preparation method) of optical sheet for display will be explained.Figure 10 is the figure (using Figure 10 to explain that the production line 141 of optical sheet for display, reason are that production line 141 is constructed in the mode identical with the production line that is used for optical sheet for display 41 of first aspect usually) of structure that the production line 141 of the optical sheet for display that is applied to the tenth preparation method is shown.Or similar elements identical with element in the production line 131 (the 9th preparation method) of the optical sheet for display of the production line 121 (the 8th preparation method) of the optical sheet for display of the production line 111 (the 7th preparation method) of the optical sheet for display of Fig. 7, Fig. 8 and Fig. 9 indicated with similar Reference numeral in the production line 141 of optical sheet for display, and will explain no longer in detail below.
The production line 141 of optical sheet for display is equipped with ultrasonic amplitude transformer 162,164 and 166, to replace the divider 142,144 and 146 in the production line 121 of optical sheet for display.In the ultrasonic amplitude transformer 162,164 and 166 each all is positioned at the downstream of pressure roller (deflector roll G).
Ultrasonic amplitude transformer 162,164 and 166 makes plural laminate melt bonded each other.Promptly; ultrasonic amplitude transformer 162 makes first optical sheet 112 and prismatic lens 114 melt bonded each other; ultrasonic amplitude transformer 164 makes prismatic lens 114 and second optical sheet 116 melt bonded each other, and ultrasonic amplitude transformer 166 makes second optical sheet 116 and screening glass 118 melt bonded each other.
Ultrasonic amplitude transformer 162,164 and 166 (ultrasonic bonds device) can be constructed in the mode identical with the ultrasonic amplitude transformer 62,64 and 66 of first aspect.
Decompressor 148 also can be constructed in the mode identical with the decompressor 48 of first aspect.
(the 11 preparation method)
Then, another preparation method (the 11 preparation method) of optical sheet for display will be explained.Figure 11 is the figure (using Figure 11 to explain that the production line 151 of optical sheet for display, reason are that production line 151 is constructed in the mode identical with the production line that is used for optical sheet for display 51 of first aspect usually) of structure that the production line 151 of the optical sheet for display that is applied to the 11 preparation method is shown.In the production line 151 of optical sheet for display with the production line 111 (the 7th preparation method) of the optical sheet for display of Fig. 7 in the production line 121 (the 8th preparation method) of optical sheet for display of element, Fig. 8 in the production line 131 (the 9th preparation method) etc. of optical sheet for display of element, Fig. 9 in identical or similar elements such as element indicate with similar Reference numeral, and will explain no longer in detail below.
The production line 151 of optical sheet for display is equipped with laser head 172,174 and 176, to replace the ultrasonic amplitude transformer 162,164 and 166 in the production line 141 of optical sheet for display.Laser head 172,174 and 176 is positioned at the downstream of pressure roller (deflector roll G) respectively in the mode identical with ultrasonic amplitude transformer 162,164 and 166.
Similar with ultrasonic amplitude transformer 162,164 and 166, laser head 172,174 and 176 makes plural laminate melt bonded each other.That is, laser head 172 makes first optical sheet 112 and prismatic lens 114 melt bonded being in the same place, and laser head 174 makes prismatic lens 114 and second optical sheet, 116 melt bonded being in the same place, and laser head 176 makes second optical sheet 116 and screening glass 118 melt bonded being in the same place.
Other structure of the production line 151 of optical sheet for display is identical with the structure in the production line 51 of the optical sheet for display of first aspect, therefore explanation no longer in detail below.
In the production line 151 of optical sheet for display with above-mentioned structure, can be as in the first aspect, preparing optical sheet for display.
(the 12 preparation method)
Then, another preparation method (the 12 preparation method) of optical sheet for display will be explained.Figure 12 is the figure (using Figure 12 to explain that the production line 161 of optical sheet for display, reason are that production line 161 is constructed in the mode identical with the production line that is used for optical sheet for display 61 of first aspect usually) of structure that the production line 161 of the optical sheet for display of using the 12 preparation method is shown.In the production line 161 of optical sheet for display with the production line 111 (the 7th preparation method) of the optical sheet for display of Fig. 7 in the production line 121 (the 8th preparation method) of optical sheet for display of element, Fig. 8 in the production line 131 (the 9th preparation method) etc. of optical sheet for display of element, Fig. 9 in identical or similar elements such as element indicate with similar Reference numeral, and will explain no longer in detail below.
The production line 161 of optical sheet for display is equipped with 1 laser head 178, to replace three laser heads 172,174 and 176 at the production line 151 of optical sheet for display.Laser head 178 is positioned at the downstream of roller (deflector roll G).
Laser head 178 makes plural laminate melt bonded each other.That is, laser head 178 makes first optical sheet 112, prismatic lens 114, second optical sheet 116 and screening glass 118 melt bonded being in the same place.
Therefore the structure of laser head 178 and decompressor 148 will be explained no longer in detail with similar at the laser head 78 and the structure in the decompressor 48 of first aspect.
In the described in the above second aspect, planar configuration of impacting the sheet (optical sheet for display 110 to 130) that by the layered product of first optical sheet 112, prismatic lens 114, second optical sheet 116 and screening glass 118 and planar configuration similar (seeing Figure 13 A and 13B and Figure 14 A and 14B) at the sheet of first aspect.
As mentioned above, according to a second aspect of the invention, can prepare optical sheet for display with than conventional method more simple steps, lower cost and the quality of Geng Gao.
And, according to a second aspect of the invention, as in first aspect, realized two advantages (that is, reduce and hang down section improving value of the product, and the reduction by preventing focusing effect is to improve performance) by reaching cost.
Although explained according to the preparation method's of the optical sheet for display of second aspect present invention exemplary, should be appreciated that the present invention is not limited to above-mentioned embodiment, and wherein can increase various modifications and variation.
The layer structure of optical sheet for display is not limited to those in above-mentioned exemplary, and for example, screening glass can be laminated on the top and/or lower surface of sheet.
Optical sheet for display with this structure is operated in the mode identical with above-mentioned embodiment, and produces similar effect.
[third aspect]
Now, will explain a third aspect of the present invention with reference to the accompanying drawings.At first, to explain several exemplary display devices optical sheet (the 12 to the 14 embodiment) for preparing by preparation method, will explain several preparation methods (the 13 to the 18 preparation method) of these optical sheet for display then according to optical sheet for display of the present invention.
[embodiment of the third aspect]
(the 12 embodiment)
Figure 22 is the cross-sectional view that shows the optical sheet for display (the 12 embodiment) for preparing by the preparation method according to optical sheet for display of the present invention.
Optical sheet for display 210 is assemblies of optical sheet, comprises, by the order that begins from the bottom, each other by first optical sheet 213 of lamination, prismatic lens 214 and second optical sheet 218.First optical sheet 213 and second optical sheet 218 can be reflecting polarizer, diffusion disk, transparent optical sheet (for example PET, TAC) etc.
Prismatic lens 214 is the lens with convex lens of common analogous shape, and described convex lens are with the matrix form orientation and the arrangement that is adjacent to each other on its whole surface usually.In the convex lens each (unit lenses) can have the xsect of taper shape, frustum, part spherical (for example, semisphere).Convex lens can be with the arranged of grid-shape (grid) pattern, twill pattern etc.For example, when the convex lens with hexagonal pyramid xsect are arranged on the film with twill pattern, can obtain to have the lens of the convex lens of hexagonal pyramid shape, the convex lens of described hexagonal pyramid shape are arranged on the described lens fully, between the lens without any interplanar every.
Particularly, prismatic lens 214 can have the convex lens of rectangular pyramid shape thereon, and described convex lens on X and Y direction, and have the recessed-male structure height of 25 μ m and the protuberance drift angles (right angle) of 90 degree with the spacing arrangement of 50 μ m.
Prismatic lens 214 can be by making with the material of the materials similar of the prismatic lens 114 of first prismatic lens 14 of first aspect (first embodiment) and second prismatic lens 16 and second aspect, and can use the similar method preparation of method with the prismatic lens 114 of first prismatic lens 14 that is used for first aspect (first embodiment) and second prismatic lens 16 and second aspect.
As described in Figure 22, at the right-hand member and the left end of optical sheet for display 210, form bonding zone 210A with articulamentum.In adhesion step, by formation bonding zone 210A such as carbon dioxide laser irradiations.
Optical sheet for display 210 for example is used for being arranged between the light supply apparatus and liquid crystal cells, forms liquid crystal indicator thus as a whole.Use under the situation of optical sheet for display 210, except various advantages recited above (can with than conventional method more simple steps, more low-cost and more high-quality prepare optical sheet for display), another kind of advantage also is provided, promptly can quite easily assembles this liquid crystal indicator.
(the 13 embodiment)
Then, with another optical sheet for display (the 13 embodiment) of explaining by the preparation in accordance with the present invention preparation.Figure 23 is the cross-sectional view that the structure of optical sheet for display 220 is shown.Or similar elements identical with element in Figure 22 (the 12 embodiment) indicated with similar Reference numeral in Figure 23, and followingly no longer carries out detailed explanation.
Optical sheet for display 220 comprises, by the order that begins from the bottom, each other by the diffusion disk 212 of lamination, prismatic lens 214 and second diffusion disk 216.
First diffusion disk 212 and second diffusion disk 216 are all made by hyaline membrane (substrate) separately, and have predetermined light diffusion character, and the surface of described hyaline membrane (substrate) (one of surface) is fixed with bead thereon by bonding agent.First diffusion disk 212 and second diffusion disk 216 have the bead of the diameter (particle mean size) that differs from one another and different light diffusion character thereon.
Be used for each hyaline membrane (substrate) of first diffusion disk 212 and second diffusion disk 216 and can be resin molding.Resin molding can be by making with the material of the materials similar of first diffusion disk 13 of second aspect and second diffusion disk, 17 usefulness.
It is the bead that 100 μ m are following and preferred 25 μ m are following that first diffusion disk 212 and second diffusion disk 216 should have diameter.For example, can to have diameter be the bead of 17 μ m in preset range and the particle mean size of 7 to 38 μ m for first diffusion disk 212 and second diffusion disk 216.
As in the 12 embodiment, above-mentioned optical sheet for display 220 for example is used for being arranged between the light supply apparatus and liquid crystal cell, forms liquid crystal indicator thus as a whole.
(the 14 embodiment)
Then, with another optical sheet for display (the 14 embodiment) of explaining by the preparation in accordance with the present invention preparation.Figure 24 is the cross-sectional view that the structure of optical sheet for display 230 is shown.In Figure 24, indicate with similar Reference numeral, and followingly no longer carry out detailed explanation with or similar elements identical with the element in Figure 23 (the 13 embodiment) at Figure 22 (the 12 embodiment).
Optical sheet for display 230 comprises, by the order that begins from the bottom, each other by first diffusion disk 212 of lamination, prismatic lens 214, second diffusion disk 216 and optical sheet 218.
Optical sheet for display 230 is configured to have the structural optical sheet 218 that is laminated to the similar of optical sheet for display 220 (the 13 embodiment).Optical sheet 218 can be reflecting polarizer, diffusion disk, transparent optical sheet (for example PET, TAC) etc.
As described in the 12 embodiment, above-mentioned optical sheet for display 230 for example is used for being arranged between the light supply apparatus and liquid crystal cells, forms liquid crystal indicator thus as a whole.
[preparation method of the third aspect]
Now, several preparation methods (the 13 to the 18 preparation method) of optical sheet for display will be explained.These preparation methods can be normally used for optical sheet for display 210 to 230, but for the purpose of simplifying the description, will only explain that preparation method wherein is applied to containing the embodiment of the optical sheet for display (the 14 embodiment) of four laminate layers.
(the 13 preparation method)
Fig. 7 is the figure (using Fig. 7 to explain that the production line 211 of optical sheet for display, reason are that production line 211 is constructed in the mode identical with the production line that is used for optical sheet for display 11 of first aspect usually) of structure that the production line 211 of the optical sheet for display that is applied to the 13 preparation method is shown. Roller 212B, 214B, 216B and 218B at Fig. 7 left end will roll at first diffusion disk 212 shown in Figure 24, prismatic lens 214, second diffusion disk 216 and optical sheet 218 respectively.
Roller 212B, 214B, 216B and 218B are supported by the turning axle of feedway (not shown) separately, and first diffusion disk 212, prismatic lens 214, second diffusion disk 216 and optical sheet 218 can be supplied with by roller 212B, 214B, 216B and 218B respectively with identical usually speed.
After supplying with, first diffusion disk 212, prismatic lens 214, second diffusion disk 216 and optical sheet 218 are supported by deflector roll G respectively, with they in the upstream of laser head 224 lamination each other, described laser head 224 will below (lamination step) explanation.
Laser head 224 is included in the laser-beam generating apparatus, this device can dispose in the mode identical with the laser head 124 of the laser head 24 of first aspect and second aspect, and the preparation process of using this laser-beam generating apparatus to prepare optical sheet for display can be carried out in the mode identical with first aspect.
According to this preparation method (the 13 preparation method) of optical sheet for display, as aspect first and second, obtain 1 advantage (to reducing the effect of damage and fault).
For example, for the effect that in the assembling of LCD, reduces the number of assembling steps number, under the situation of the optical sheet for display 230 (seeing Figure 23) that uses the 14 embodiment, only need be used for 1 step of mount display with optical sheet 230, and under the situation of using conventional goods, need 6 steps: the installation of first diffusion disk; Peeling off of the back of the body screening glass of lens; Peeling off of the preceding screening glass of lens; The installation of lens; The installation of second diffusion disk; And the installation of optical sheet.Therefore, in the 13 preparation method, can significantly reduce the number of assembling steps number, reduce the cost of final products like this.
And, can be as aspect first and second, realize reducing the advantage of the effect of screening glass.Particularly; in the optical sheet for display 210 (seeing Figure 22) of the 12 embodiment, can save 2 screening glass that are used for prismatic lens 214; in the optical sheet for display 220 (seeing Figure 23) of the 13 embodiment, 2 screening glass that are used for prismatic lens 214 can be saved, and in the optical sheet for display 230 (seeing Figure 24) of the 14 embodiment, 2 screening glass that are used for prismatic lens 214 can be saved.
(the 14 preparation method)
Then, another preparation method (the 14 preparation method) of optical sheet for display will be explained.Fig. 8 is the figure (using Fig. 8 to explain that the production line 221 of optical sheet for display, reason are that production line 221 is constructed in the mode identical with the production line that is used for optical sheet for display 21 of first aspect usually) of structure that the production line 221 of the optical sheet for display that is applied to the 14 preparation method is shown.Identical or the similar elements of element in the production line 211 (the 13 preparation method) of in the production line 221 of optical sheet for display and optical sheet for display Fig. 7 is indicated with like reference numerals, and below will no longer be made an explanation.
The production line 221 of optical sheet for display is equipped with divider 242,244 and 246 and decompressor 248, to replace the laser head 224 in the production line 211 of optical sheet for display.
Divider 242,244 and 246 is respectively from the supply of its each far-end releasing adhesive.Divider 242 is fed to bonding agent on the front surface of first diffusion disk 212, so that first diffusion disk 212 and prismatic lens 214 are bonded together, divider 244 is fed to bonding agent on the front surface of prismatic lens 214, so that the prismatic lens 214 and second diffusion disk 216 are bonded together, and divider 246 is fed to the front surface of second diffusion disk 216 with bonding agent, so that second diffusion disk 216 and optical sheet 218 are bonded together.
Have the production line that is used for optical sheet for display 221 of above-mentioned structure, optical sheet for display can prepare as aspect first and second.
(the 15 preparation method)
Then, another preparation method (the 15 preparation method) of optical sheet for display will be explained.Fig. 9 is the figure (using Fig. 9 to explain that the production line 231 of optical sheet for display, reason are that production line 231 is constructed in the mode identical with the production line that is used for optical sheet for display 31 of first aspect usually) of structure that the production line 231 of the optical sheet for display that is applied to the 15 preparation method is shown.Identical or the similar elements of element in the production line 221 (the 14 preparation method) of the production line 211 (the 13 preparation method) of in the production line 231 of optical sheet for display and optical sheet for display Fig. 7 and the optical sheet for display of Fig. 8 is indicated with like reference numerals, and below will no longer be made an explanation.
The production line 231 of optical sheet for display is equipped with adhesive tape distributor 252,254 and 256, to replace the divider 242,244 and 246 at the production line 221 that is used for optical sheet for display.Adhesive tape distributor 252,254 and 256 is respectively from its each far-end supply double sticky tape.
Adhesive tape distributor 252 is supplied to double sticky tape the front surface of first diffusion disk 212, so that first diffusion disk 212 and prismatic lens 214 are bonded together, adhesive tape distributor 254 is supplied to double sticky tape the front surface of prismatic lens 214, so that the prismatic lens 214 and second diffusion disk 216 are bonded together, and adhesive tape distributor 256 is supplied to the front surface of second diffusion disk 216 with double sticky tape, so that second diffusion disk 216 and optical sheet 218 are bonded together.
Other structure of the production line 231 of optical sheet for display is similar to the structure in the production line 131 of the optical sheet for display of the production line 31 of the optical sheet for display of first aspect and second aspect, therefore will explain no longer in detail below.
Have the production line that is used for optical sheet for display 231 of above-mentioned structure, optical sheet for display can prepare as aspect first and second.
(the 16 preparation method)
Then, another preparation method (the 16 preparation method) of optical sheet for display will be explained.Figure 10 is the figure (using Figure 10 to explain that the production line 241 of optical sheet for display, reason are that production line 241 is constructed in the mode identical with the production line that is used for optical sheet for display 41 of first aspect usually) of structure that the production line 241 of the optical sheet for display that is applied to the 16 preparation method is shown.Identical or the similar elements of element in the production line 231 (the 15 preparation method) of the production line 221 (the 14 preparation method) of the production line 211 (the 13 preparation method) of in the production line 241 of optical sheet for display and optical sheet for display Fig. 7, the optical sheet for display of Fig. 8 and the optical sheet for display of Fig. 9 is indicated with like reference numerals, and below will no longer be made an explanation.
The production line 241 of optical sheet for display is equipped with ultrasonic amplitude transformer 262,264 and 266, to replace the divider 242,244 and 246 in the production line 221 of optical sheet for display.Ultrasonic amplitude transformer 262,264 and 266 lays respectively at the downstream of pressure roller (deflector roll G).
Ultrasonic amplitude transformer 262,264 and 266 makes plural laminate melt bonded each other.Promptly, ultrasonic amplitude transformer 262 makes first diffusion disk 212 and prismatic lens 214 melt bonded being in the same place, ultrasonic amplitude transformer 264 makes prismatic lens 214 and second diffusion disk, 216 melt bonded being in the same place, and ultrasonic amplitude transformer 266 makes second diffusion disk 216 and optical sheet 218 melt bonded being in the same place.
Ultrasonic amplitude transformer 262,264 and 266 (ultrasonic bonds device) can with the ultrasonic amplitude transformer 62,64 of first aspect and 66 and the same mode of the ultrasonic amplitude transformer 162,164 and 166 of second aspect dispose.
Decompressor 248 also can be to dispose with the same mode of the decompressor 148 of the decompressor 48 of first aspect and second aspect.
(the 17 preparation method)
Then, another preparation method (the 17 preparation method) of optical sheet for display will be explained.Figure 11 is the figure (using Figure 11 to explain that the production line 251 of optical sheet for display, reason are that production line 251 is constructed in the mode identical with the production line that is used for optical sheet for display 51 of first aspect usually) of structure that the production line 251 of the optical sheet for display that is applied to the 17 preparation method is shown.Identical or the similar elements of element in production line 231 (the 15 preparation method) of the production line 221 (the 14 preparation method) of the production line 211 (the 13 preparation method) of in the production line 251 of optical sheet for display and optical sheet for display Fig. 7, the optical sheet for display of Fig. 8 and the optical sheet for display of Fig. 9 etc. is indicated with like reference numerals, and below will no longer be made an explanation.
The production line 251 of optical sheet for display is equipped with laser head 272,274 and 276, to replace the ultrasonic amplitude transformer 262,264 and 266 in the production line 241 of optical sheet for display.Laser head 272,274 and 276 is positioned at the downstream of pressure roller (deflector roll G) respectively in the mode identical with ultrasonic amplitude transformer 262,264 and 266.
Be similar to ultrasonic amplitude transformer 262,264 and 266, laser head 272,274 and 276 makes plural laminate melt bonded each other.That is, laser head 272 makes first diffusion disk 212 and prismatic lens 214 melt bonded being in the same place, and laser head 274 makes prismatic lens 214 and second diffusion disk, 216 melt bonded being in the same place, and laser head 276 makes second diffusion disk 216 and optical sheet 218 melt bonded being in the same place.
Other structure of the production line 251 of optical sheet for display is similar to the structure at the production line that is used for optical sheet for display 151 of the production line that is used for optical sheet for display 51 of first aspect and second aspect, therefore will explain no longer in detail below.
Have the production line that is used for optical sheet for display 251 of above-mentioned structure, optical sheet for display can be as preparing first.
(the 18 preparation method)
Then, another preparation method (the 18 preparation method) of optical sheet for display will be explained.Figure 12 is the figure (using Figure 12 to explain that the production line 261 of optical sheet for display, reason are that production line 261 is constructed in the mode identical with the production line that is used for optical sheet for display 61 of first aspect usually) of structure that the production line 261 of the optical sheet for display that is applied to the 18 preparation method is shown.Identical or the similar elements of element in production line 231 (the 15 preparation method) of the production line 221 (the 14 preparation method) of the production line 211 (the 13 preparation method) of in the production line 261 of optical sheet for display and optical sheet for display Fig. 7, the optical sheet for display of Fig. 8 and the optical sheet for display of Fig. 9 etc. is indicated with like reference numerals, and below will no longer be made an explanation.
The production line 261 of optical sheet for display is equipped with 1 laser head 278, to replace 3 laser heads 272,274,276 in the production line 251 of optical sheet for display.Laser head 278 is positioned at the downstream of roller (deflector roll G).
Laser head 278 makes plural laminate melt bonded each other.That is, laser head 278 makes first diffusion disk 212, prismatic lens 214, second diffusion disk 216 be in the same place with the layered product of optical sheet 218 is melt bonded.
The structure of laser head 278 and decompressor 248 is similar to laser head aspect first and second and the structure in the decompressor, therefore will explain no longer in detail below.
In the above-mentioned third aspect, the planar configuration of impacting the sheet (optical sheet for display 210 to 230) that by the layered product of first diffusion disk 212, prismatic lens 214, second diffusion disk 216 and optical sheet 218 is similar to the structure of the sheet (seeing Figure 13 A and 13B and Figure 14 A and 14B) of first and second aspects.
According to a third aspect of the invention we, can be to prepare optical sheet for display than the more easy steps of conventional method, more low-cost and higher quality.
And, according to a third aspect of the invention we, as in second aspect, realized two advantages (that is, reduce and hang down section improving value of the product, and the reduction by preventing focusing effect is to improve character) by reaching cost.
Although explained according to the preparation method's of the optical sheet for display of third aspect present invention exemplary, should be appreciated that the present invention is not limited to above-mentioned embodiment, and wherein can increase various modifications and variation.
For example, the layer structure of optical sheet for display is not limited to those in above-mentioned exemplary, and screening glass can be laminated on the top and/or lower surface of sheet.
Optical sheet for display with this structure is operated in the mode identical with above-mentioned embodiment, and produces similar effect.
[embodiment]
Now, will explain embodiment below according to first embodiment of the present invention.
[preparation of prismatic lens]
The prismatic lens that is used for first prismatic lens 14 and second prismatic lens 16 is by being prepared as follows.This prismatic lens both had been used as first prismatic lens 14, was used as second prismatic lens 16 again.
● the preparation of resin solution
Compound in Figure 15 is mixed with listed weight ratio, and this potpourri under agitation is heated to 50 ℃, dissolved up to all compounds, thus prepare resin solution.The title and the composition of compound are as follows:
EB3700:Ebecryl 3700, and Dicel UC incorporated company (Dicel UC Co., Ltd.), bisphenol A epoxy acrylate (viscosity: 2200mPas/65 ℃)
BPE200:NK ester BPE-200, and Shin-Nakamura chemistry incorporated company (Shin-Nakamura Chemical Co., Ltd.), the bisphenol-A of oxirane addition
METH acrylate (viscosity: 590mPas/25 ℃) BR-31:New Frontier BR-31, (the Dai-ichi Kogyo Seiyaku Co. of Dai-ichi Kogyo Seiyaku incorporated company, Ltd.), acrylic acid tribromophenoxy ethyl ester (in room temperature is solid, fusing point: more than 50 ℃)
LR8893X:Lucirin LR8893X, from the radical initiator of BASF AG (BASF Corp.), ethyl-2,4,6-trimethyl-benzoyl ethoxyl phenenyl phosphine oxide (osphineoxide)
MEK: methyl ethyl ketone
This prismatic lens uses the prismatic lens with structure shown in Figure 16 to be prepared with preparation facilities.
Sheet W is that width is that 500mm, thickness are clear PET (polyethylene terephthalate) film of 100 μ m.
Knurling rolls 83 are that its length is that 700mm (on the Width of sheet W), diameter are 300mm, and have the circumferential surface of nickel by the roller of S45C preparation.By using the cutting work of diamond (bite) (single-point), on the whole circumference surface across about 500mm of roller, the spacing that is formed on roller axial is the groove of 50 μ m.It is 90 ℃ triangular cross section that groove has drift angle, and groove also to have drift angle be 90 ℃ triangle bottom, and without any flat portions.That is, the width of groove is 50 μ m, and the degree of depth is about 25 μ m.Because groove is a peripheral annular, therefore under the situation of using knurling rolls 83, can on sheet W, form biconvex lens (prismatic lens) with triangular cross section.After groove forms, nickel plating is carried out on the roller surface.
Apparatus for coating 82 is the mould coating machines with extruding type dispense tip 82C.
Coating solution F (resin solution) is according to composition preparation shown in Figure 15.Coating solution F is controlled to supply to dispense tip 82C, so that after the organic solvent drying in wet coating solution F (resin), obtain the film thickness of 20 μ m of this coating solution by feedway 82B.
Drying device 89 is hot air circulate formula drying devices.Air is heated to 100 ℃ temperature.
Mip rolls 84 has the diameter of 200mm, and is mounted with silastic-layer on its circumferential surface, and rubber has the rubber hardness of 90 degree.Under the pressurization pressure (effectively pressurization pressure) of 0.5 Pa, sheet is suppressed between knurling rolls 83 and mip rolls 84.
Use metal halide lamp as resin solidification device 85, its irradiation 1000mJ/cm 2Energy.
Like this, obtain to have on it prismatic lens of recessed-convex pattern.
[preparation of first diffusion disk 12]
Form following undercoat, back coating and optical diffusion layer by order, prepare first diffusion disk 12 (following diffusion disk).
● undercoat
(linear dimension=#10), the coating solution A that will have a following composition are applied on 1 surface of polyethylene terephthalate film (substrate) that thickness is 100 μ m, and 120 ℃ of dryings 2 minutes, obtaining thickness was the undercoat of 1.5 μ m to use the coiling rod.
(coating solution that is used for undercoat)
Methyl alcohol 4165g
JURYMER SP-50T (Nihonjunyaku incorporated company) 1495g
Cyclohexanone 339g
JURYMER MB-IX (Nihonjunyaku incorporated company) 1.85g
(organic filler: the polymethylmethacrylate of crosslink type, average particle size are the spherical super fine particle of 6.2 μ m)
● back coating
(linear dimension=#10), the coating solution B that will have following composition is applied on another surface of the substrate with described undercoat, and 120 ℃ of dryings 2 minutes, obtaining thickness was the back coating of 2.0 μ m to use the coiling rod.
(coating solution that is used for back coating)
Methyl alcohol 4171g
JURYMER SP-65T (Nihonjunyaku incorporated company) 1487g
Cyclohexanone 340g
JURYMER MB-IX (Nihonjunyaku incorporated company) 2.68g
(organic filler: the polymethylmethacrylate of crosslink type, average particle size are the spherical super fine particle of 6.2 μ m)
● optical diffusion layer
(linear dimension=#22), the coating solution C that will have following composition is applied on the lip-deep undercoat of the substrate with described undercoat and described back coating, and 120 ℃ of dryings 2 minutes, obtains optical diffusion layer to use the coiling rod.As described below, coating solution C is coated with in two ways: coating immediately after coating solution C preparation; And after coating solution C preparation, place and be coated with again in 2 hours.
(coating solution that is used for optical diffusion layer)
Cyclohexanone 20.84g
Disparon PFA-230, solid content 20 quality %, 0.74g
(sagging inhibitor: fatty acid amide, Kusumoto chemistry company limited (Kusumoto Chemicals, Ltd.))
Acryl resin (DIANAL BR-117, Mitsubishi Rayon incorporated company) 20 quality % methyl ethyl ketone solution 17.85g
JURYMER MB-20X (Nihonjunyaku incorporated company) 11.29g
(organic filler: the polymethylmethacrylate of crosslink type, average particle size are the spherical super fine particle of 18 μ m)
F780F (big Japanese ink and chemical company (Dainippon Ink and ChemicalsIncorporated)) 0.03 g
(solution of methyl ethyl ketone 30 quality %)
[preparation of second diffusion disk 18]
Under condition same as described above and identical step, prepare second diffusion disk 18 (top diffusion disk), difference is the JURYMER MB-20X of 1.13g is added in the optical diffusion layer, to replace adding to the JURYMER MB-20X of the 11.29g in first diffusion disk 12.
[preparation of optical sheet for display 10: embodiment]
Use above-mentioned sheet, preparation optical sheet for display 10 (assembly of optical sheet), wherein, by the order that begins from the bottom, with first diffusion disk 12, first prismatic lens 14, second prismatic lens 16 and second diffusion disk 18 lamination each other as shown in Figure 1.
In this preparation, use in the production line that is used for optical sheet for display 11 shown in Figure 7 (first preparation method).Adopt the carbon dioxide laser irradiating device as the laser-beam generating apparatus that is equipped with laser head 24.The laser of irradiation has the wavelength of 10 μ m, the power of 25W and the frequency of 50kHz.
Cutting on four sides of layered product of above-mentioned, and simultaneously that four marginal portions of four sides are bonding by the irradiation laser bundle, thus prepare optical sheet for display 10.
[preparation of optical sheet for display: comparative example]
Use above-mentioned (first diffusion disk 12, first prismatic lens 14, second prismatic lens 16 and second diffusion disk 18), by impacting each sheet of product size one by one, subsequently with described one by one lamination and with described bonded to each other, prepare optical sheet for display.
[evaluation of optical sheet for display]
100 groups of optical sheet for display that prepare in an embodiment and 100 groups of optical sheet for display of preparing in comparative example are installed in the LCD respectively, and the existence of any damage and fault in these devices is estimated.When being observed visually owing to the caused spectral line of emission of damage, this group optical sheet that will have this spectral line is evaluated as unsatisfactory.
As a result, in an embodiment in Zhi Bei 100 groups of optical sheet for display only 1 group be evaluated as unsatisfactoryly, and have 24 groups to be evaluated as and to make us dissatisfied in 100 groups of optical sheet for display that in comparative example, prepare.This shows, uses the optical sheet for display according to the embodiment of the invention, and the damage and the fault that can be implemented in the optical sheet for display significantly reduce.

Claims (40)

1. the preparation method of an optical sheet for display, described method comprises:
Lamination step, the diffusion disk that planar dimension is equal to or greater than product size is laminated on the front surface and/or rear surface of at least one lens, the planar dimension of described lens is equal to or greater than product size, and have convex lens, described convex lens one axially on the orientation and the arrangement that is adjacent to each other on the whole surface at described lens usually;
Cutting step cuts into product size with the layered product of diffusion disk and lens along its periphery; And
Adhesion step, lens and diffusion disk is bonded to each other at its at least more than one periphery point.
2. the preparation method of an optical sheet for display, described method comprises:
Lamination step, two planar dimensions are equal to or greater than product size and have the lens of convex lens, wherein said convex lens one axially on the orientation and the arrangement that is adjacent to each other on the whole surface at lens separately usually, each other lamination so that the convex lens on each sheet axially intersect each other into common right angle, and the diffusion disk that planar dimension is equal to or greater than product size is laminated on the front surface and/or rear surface of layered product of described lens;
Cutting step cuts into product size with the layered product of lens and diffusion disk along its periphery; And
Adhesion step, lens and lens and diffusion disk is bonded to each other at its at least more than one periphery point.
3. according to the preparation method of the optical sheet for display of claim 1 or 2, wherein, in adhesion step, that described lens and/or described diffusion disk is melt bonded each other.
4. according to the preparation method of the optical sheet for display of claim 1 or 2, wherein, in described adhesion step, that described lens and/or bonded to each other dose of described diffusion disk is bonding.
5. according to the preparation method of the optical sheet for display of claim 1 or 2, wherein, described cutting step and described adhesion step are carried out simultaneously by the irradiation laser bundle usually.
6. according to the preparation method of the optical sheet for display of claim 1, wherein, in described adhesion step, that described lens and described diffusion disk is bonded to each other along its at least one peripheral edge part.
7. according to the preparation method of the optical sheet for display of claim 1, wherein, in described adhesion step, that described lens and described diffusion disk is bonded to each other along its 4 peripheral edge parts.
8. according to the preparation method of the optical sheet for display of claim 2, wherein, in described adhesion step, that described lens and lens and described diffusion disk is bonded to each other along its at least one peripheral edge part.
9. according to the preparation method of the optical sheet for display of claim 2, wherein, in described adhesion step, that described lens and lens and described diffusion disk is bonded to each other along its 4 peripheral edge parts.
10. according to the preparation method of the optical sheet for display of claim 1 or 2, wherein, described lens has identical thermal expansivity usually with described diffusion disk.
11. an optical sheet for display, it comprises:
At least one has the lens of convex lens, described convex lens one axially on orientation, and the arrangement that on the whole surface of described lens, is adjacent to each other usually; And
Diffusion disk, described diffusion disk are in turn laminated on the front surface and/or rear surface of described lens,
Wherein said lens and described diffusion disk are bonded to each other at its at least more than one periphery point.
12. an optical sheet for display, it comprises:
Two lens with convex lens, described convex lens one axially on the orientation and the arrangement that is adjacent to each other on the whole surface at each lens usually, described two lens are by lamination each other, and what make described convex lens on each sheet axially intersects each other into common right angle; And
Diffusion disk, described diffusion disk are in turn laminated on the front surface and/or rear surface of lens layered product,
Wherein said two lens and described lens and described diffusion disk are bonded to each other at its at least more than one periphery point.
13. the preparation method of an optical sheet for display, described method comprises:
Lamination step, the optical sheet that plural planar dimension is equal to or greater than product size is lamination each other;
Cutting step cuts into described product size with the layered product of optical sheet along its periphery; And
Adhesion step is bonded together the layered product of optical sheet at its at least more than one periphery point.
14. the preparation method of an optical sheet for display, described method comprises:
Lamination step, the optical sheet that planar dimension is equal to or greater than product size is laminated on the front surface and/or rear surface of at least one lens, the planar dimension of described lens is equal to or greater than product size and described lens has convex lens, described convex lens one axially on the orientation and the arrangement that is adjacent to each other on the whole surface at described lens usually;
Cutting step cuts into described product size with the layered product of described optical sheet and described lens along its periphery; And
Adhesion step, described optical sheet and described lens is bonded to each other at its at least more than one periphery point.
15. the preparation method of an optical sheet for display, described method comprises:
Lamination step, two planar dimensions are equal to or greater than product size and have the lens of convex lens, wherein said convex lens one axially on the orientation and the arrangement that is adjacent to each other on the whole surface at described lens usually, each other lamination so that the described convex lens on each sheet axially intersect each other into common right angle, and the optical sheet that planar dimension is equal to or greater than product size is laminated on the front surface and/or rear surface of layered product of described lens;
Cutting step cuts into described product size with the layered product of described optical sheet and described lens along its periphery; And
Adhesion step, described two lens and described lens and described optical sheet is bonded to each other at its at least more than one periphery point.
16. according to the preparation method of each optical sheet for display in the claim 13 to 15, wherein, in described adhesion step, described lens and/or described optical sheet are melt bonded each other.
17. according to the preparation method of each optical sheet for display in the claim 13 to 15, wherein, in described adhesion step, described lens and/or described optical sheet are glue bound each other.
18. according to the preparation method of each optical sheet for display in the claim 13 to 15, wherein, described cutting step and described adhesion step are carried out simultaneously by the irradiation laser bundle usually.
19. according to the preparation method of the optical sheet for display of claim 13, wherein, in described adhesion step, described optical sheet along its at least one peripheral edge part by bonded to each other.
20. according to the preparation method of the optical sheet for display of claim 13, wherein, in described adhesion step, described optical sheet along its four peripheral edge parts by bonded to each other.
21. according to the preparation method of the optical sheet for display of claim 14, wherein, in described adhesion step, described lens and described optical sheet along its at least one peripheral edge part by bonded to each other.
22. according to the preparation method of the optical sheet for display of claim 14, wherein, in described adhesion step, described lens and described optical sheet along its four peripheral edge parts by bonded to each other.
23. according to the preparation method of the optical sheet for display of claim 15, wherein, in described adhesion step, described lens and described lens and described optical sheet along its at least one peripheral edge part by bonded to each other.
24. according to the preparation method of the optical sheet for display of claim 15, wherein, in described adhesion step, described lens and described lens and described optical sheet along its four peripheral edge parts by bonded to each other.
25. according to the preparation method of each optical sheet for display in the claim 13 to 15, wherein, described lens has identical thermal expansivity usually with described optical sheet.
26. an optical sheet for display, it comprises:
Plural optical sheet, described optical sheet lamination and bonding each other on its at least more than one periphery point.
27. an optical sheet for display, it comprises:
At least one has the lens of convex lens, described convex lens one axially on the orientation and the arrangement that is adjacent to each other on the whole surface at described lens usually; And
Optical sheet, it is in turn laminated on the front surface and/or rear surface of described lens,
Wherein said lens and described optical sheet on its at least more than one periphery point by bonded to each other.
28. an optical sheet for display, it comprises:
Two lens with convex lens, described convex lens one axially on the orientation and the arrangement that is adjacent to each other on the whole surface at described lens usually, described two lens are by lamination each other, make described convex lens on each sheet described axially intersect each other into common right angle; And
Optical sheet, it is in turn laminated on the front surface and/or rear surface of described lens layered product,
Wherein said two lens and lens and described optical sheet on its at least more than one periphery point by bonded to each other.
29. the preparation method of an optical sheet for display, described method comprises:
Lamination step, the optical sheet that planar dimension is equal to or greater than product size is laminated on the front surface and/or rear surface of at least one lens, the planar dimension of described lens is equal to or greater than product size and has convex lens, described convex lens have usually similarly shape, and usually on the whole surface of described lens with the matrix form arrangement that is adjacent to each other;
Cutting step cuts into described product size with the layered product of described optical sheet and lens along its periphery; And
Adhesion step, described optical sheet and described lens is bonded to each other at its at least more than one periphery point.
30. according to the preparation method of the optical sheet for display of claim 29, wherein said convex lens have coniform shape.
31. according to the preparation method of the optical sheet for display of claim 29 or 30, wherein said optical sheet is a diffusion disk.
32. according to the preparation method of the optical sheet for display of claim 29 or 30, wherein in described adhesion step, described lens and/or described optical sheet are by melt bonded each other.
33. according to the preparation method of the optical sheet for display of claim 29 or 30, wherein in described adhesion step, described lens and/or optical sheet are bonded to each other by bonding agent.
34. according to the preparation method of the optical sheet for display of claim 29 or 30, wherein said cutting step and described adhesion step are carried out simultaneously by the irradiation laser bundle usually.
35. according to the preparation method of the optical sheet for display of claim 29 or 30, wherein in described adhesion step, described lens and described optical sheet along its at least one peripheral edge part by bonded to each other.
36. according to the preparation method of the optical sheet for display of claim 29 or 30, wherein in described adhesion step, described lens and described optical sheet along its 4 peripheral edge parts by bonded to each other.
37. according to the preparation method of the optical sheet for display of claim 29 or 30, wherein said lens has identical thermal expansivity usually with described optical sheet.
38. an optical sheet for display, it comprises:
At least one lens, the planar dimension of described lens are equal to or greater than product size and have convex lens, and described convex lens have usually similarly shape, and usually on the whole surface of described lens with the matrix form arrangement that is adjacent to each other; And
Optical sheet, its planar dimension is equal to or greater than product size, and is in turn laminated on the front surface and/or rear surface of described at least one lens,
Wherein said lens and described optical sheet are bonded to each other at its at least more than one periphery point.
39. according to the optical sheet for display of claim 38, wherein said convex lens have coniform shape.
40. according to the optical sheet for display of claim 38 or 39, wherein said optical sheet is a diffusion disk.
CNA2006800315274A 2005-08-31 2006-08-29 Optical sheet for display and manufacturing method thereof Pending CN101253543A (en)

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