CN103085438A - Method and device for laminating optical sheet, and pressure-sensitive adhesive sheet used thereto - Google Patents

Method and device for laminating optical sheet, and pressure-sensitive adhesive sheet used thereto Download PDF

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Publication number
CN103085438A
CN103085438A CN2012104309636A CN201210430963A CN103085438A CN 103085438 A CN103085438 A CN 103085438A CN 2012104309636 A CN2012104309636 A CN 2012104309636A CN 201210430963 A CN201210430963 A CN 201210430963A CN 103085438 A CN103085438 A CN 103085438A
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China
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mentioned
optical sheet
zone
sheet
adhesive sheet
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CN103085438B (en
Inventor
世良贤二
世古畅哉
松崎忠弘
石井宪和
石川雄作
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Tianma Japan Ltd
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NLT Technologeies Ltd
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1303—Apparatus specially adapted to the manufacture of LCDs

Abstract

The present invention provides a method and device for laminating an optical sheet, and a pressure-sensitive adhesive sheet used thereto. When an optical sheet which is similar with a double-lens sheet and is provided with fine recesses and projections on a front surface is adhibited on a substrate, substrate lift caused by adhesion force of an optical sheet keeping surface along with end part lift of the optical sheet keeping surface. An adhesion sheet (30) is mounted on the optical sheet keeping surface of a curvature head (20). The adhesive sheet is provided with the following components: a first area (30a) which has the adhesion force that can keep the optical sheet; and a second area (30b) which has an adhesion force that is weak than that of the first area. After the front surface of the optical sheet (10) is adhered and kept (temporarily fixed) on the first area of the adhesive sheet, the back surface of the optical sheet is integrally adhered on the substrate (50). Then, in a step of further rotating the curvature head for insulating the optical sheet from the optical sheet keeping surface, a second area of the adhesive sheet that is mounted on the optical sheet keeping surface is mounted to oppose the substrate.

Description

Optical sheet applying method, device and the adhesive sheet of using thereof
Technical field
The present invention relates to use adhesive sheet optical sheet to be fitted to technology on the substrates such as liquid crystal panel, furtherly, relating to can be with the adhesive sheet that has trickle concavo-convex optical sheet in the front fit to optical sheet applying method on substrate, install and be applicable to this optical sheet applying method, device as bi-convex lens sheet for example.
Background technology
In recent years, developed the optical thin films such as Polarizer, lens, sheet (following these are referred to as optical sheet) have been fitted on glass substrate and the method for making the various devices such as thin display panel.The technology that Polarizer is fitted on glass substrate is widely used when making liquid crystal panel etc., but add several functions owing to considering by the multiple optical sheet of fitting, and therefore, has also developed the technology of using multiple optical sheet applying outside this.
For example, in No. 3004532 communique of Japan special permission (patent documentation 1), disclose the used for liquid crystal display element film that is used for to have layer of adhesive material and pasted " used for liquid crystal display element apparatus for film adhesion " on substrate.This device is characterised in that, be provided with supporting mechanism, it has the flexure plane that the film opposite face protrudes in order to support the used for liquid crystal display element film, and make with above-mentioned layer of adhesive material and be positioned at the mode in the outside along the temporary fixed said film of above-mentioned flexure plane so that the end edge portion of the said film mode butt consistent with the end edge portion of aforesaid substrate, when said film is pasted aforesaid substrate its rotation freely, the turnover of following aforesaid substrate is moved and is pasted along aforesaid substrate when rotary push.In addition, in patent documentation 1, the used for liquid crystal display element film is for such as Polarizer, AR(antireflection) film, AG(anti-dazzle) macromolecule membrane such as film, reflective film and ultraviolet radiation absorption film.
In the device of patent documentation 1, for example when pasting Polarizer, can use as above-mentioned supporting mechanism around the Polarizer supporter (curvature head) that a rotating shaft rotates and have the flexure plane of convex.Be formed with a plurality of attractions hole that is connected with vavuum pump on above-mentioned flexure plane, keep (temporary fixed) on above-mentioned flexure plane Polarizer by vacuum suction.
At first, by vacuum suction, Polarizer so that being in the mode in the outside, its layer of adhesive material is temporarily anchored to precalculated position on the flexure plane of Polarizer supporter.At this moment, make the rotation of Polarizer supporter, so that it is upper that its flexure plane is arrived.And, under this state, peel the protective film that covers above-mentioned layer of adhesive material and expose above-mentioned layer of adhesive material.
On the other hand, liquid crystal cells (substrate) transmits towards the Polarizer supporter in the horizontal direction with the state that is fixed on the liquid crystal cells supporter, arrives the precalculated position of the below of Polarizer supporter.
Next, make by vacuum suction to keep the Polarizer supporter of (temporary fixed) Polarizer to descend, it is rotated around above-mentioned rotating shaft, and make the corresponding ora terminalis butt of ora terminalis and liquid crystal cells (substrate) of the Polarizer of maintenance.And, make the Polarizer supporter be in the state that can rotate freely, then when keeping this butt state, the liquid crystal cells supporter is moved horizontally.Thus, can Polarizer supporter and liquid crystal cells supporter be relatively moved.
This relatively move during, the bonding force that keeps (temporary fixed) Polarizer on the Polarizer supporter to have by its layer of adhesive material, begin to leave the Polarizer supporter from the part of joining with glass substrate, follow at last moving horizontally of liquid crystal cells supporter, its integral body sticks on liquid crystal cells.Polarizer leaves the Polarizer supporter like this and moves on liquid crystal cells.This be because, compare the confining force based on the Polarizer of vacuum suction, set the bonding force of the bond layer of Polarizer stronger.
In the device of patent documentation 1, due to as above-mentioned Polarizer is fitted to liquid crystal cells, therefore can not produce internal modification on Polarizer and press inequality and applying (with reference to claim 1, paragraph 0026～0041 and Fig. 1～3) that can be good.
In addition, as related background art, exist in TOHKEMY 2010-168079 communique (patent documentation 2) disclosed " label sticker ".This device possesses the 1st paste section, the 2nd paste section, transport unit and guide for the device to the article with label sticking, and wherein above-mentioned label has: the 1st label area is installed in the 1st of article and is stuck in the zone; With the 2nd label area, be installed in from the above-mentioned the 1st zone the different the 2nd that is stuck and be stuck in the zone.
The 1st label area of this label is pasted to the 1st zone (for example the lid of container is top) that is stuck in the 1st paste section under the state that the 2nd label area of above-mentioned label exposes from above-mentioned article.The 2nd label area of above-mentioned label is pasted to the 2nd of the above-mentioned label zone (for example side of the side of the lid of container and container) that is stuck in the 2nd paste section.Transport unit transmits said vesse from the 1st paste section to the 2nd paste section.Guide guides the 2nd label area of the above-mentioned label that exposes from the article that transmit to the 2nd paste section from the 1st paste section.Guide has the guide member that the bonding plane of above-mentioned label is had non-cementability, and this guide member applies to realize by pasting non-adhered thin film or implement non-cementability on its surface.The front of this non-adhered thin film has non-cementability, and the back side is formed with the bond layer of pasting use.
Device according to patent documentation 2, due to the 2nd label area of the above-mentioned label that exposes from the above-mentioned article that transmit to the 2nd paste section from the 1st paste section by the guide member guiding with non-cementability, therefore the process that transmits the above-mentioned label that exposes from above-mentioned article and paste, unexpected position can be prevented from sticking on, and stickup (with reference to specification digest, claim 1～4, paragraph 0047～0051 and Fig. 1～6) can be stably continued.
As other related background art, exist in TOHKEMY 2010-066283 communique (patent documentation 3) disclosed " optical thin film sticker ".This device is the optical thin film sticker, has: feed mechanism, supply with optical thin film (Polarizer, phase-contrast film, dim light film); Maintaining body keeps above-mentioned optical thin film; Bonding plane protective film mechanism for stripping carries out the peeling off of protective film of bonding plane from above-mentioned optical thin film; And display floater contact mechanism; make the above-mentioned optical thin film of display floater contact; it is characterized in that; above-mentioned maintaining body is made of the pipe (roller) that the surface has cementability; follow rotatablely moving of above-mentioned maintaining body, be configured to the above-mentioned optical thin film position by the above-mentioned optical thin film of bonding maintenance, the position of bonding plane protective film of peeling off above-mentioned optical thin film and the position that above-mentioned display floater is contacted with above-mentioned optical thin film successively in order.
Then, above-mentioned pipe (roller) has bonding force and weakens the position near the stickup starting position of optical thin film.Therefore, optical thin film can easily break away from from above-mentioned pipe after pasting on display floater, consequently, can not make optical thin film produce fold, bubble, can paste on display floater rapidly.In addition, thereby by arranging in advance concavo-convex at this position on the surface of the above-mentioned pipe with cementability or embedding the weak parts of bonding force, movable part is set reduces contact area, form above-mentioned bonding force and weaken position (with reference to specification digest, claim 1～7, paragraph 0014～0052, Fig. 1～8).
The prior art document
Patent documentation
Patent documentation 1: Japan's special permission No. 3004532 communique (with reference to claim 1, paragraph 0026～0041, Fig. 1～3)
Patent documentation 2: TOHKEMY 2010-168079 communique (with reference to specification digest, claim 1～4, paragraph 0047～0051, Fig. 1～6)
Patent documentation 3: TOHKEMY 2010-066283 communique (with reference to specification digest, claim 1～7, paragraph 0014～0052, Fig. 1～8)
Summary of the invention
Yet, in recent years, in the 3D(Three Dimensional that exploitation becomes increasingly active, three-dimensional) show in the thin display panel of use, the transparent optical sheet (hereinafter referred to as bi-convex lens sheet) that is formed with biconvex lens is fitted with being formed on the position consistency of the pixel groups on glass substrate.This is because by making the people's who observes through biconvex lens the different image of right and left eyes identification, can realize easily that 3D shows.
In the front of bi-convex lens sheet, dispose side by side the trickle lens (biconvex lens) that a plurality of surfaces are little curved surface.In order to prevent that biconvex lens from leaving scar or spot, cover the front of bi-convex lens sheet with protective film.Took this protective film off before the operation that is about to carry out bi-convex lens sheet is fitted on glass substrate.
The back side of bi-convex lens sheet is smooth, covers whole with thinner layer of adhesive material.The rear side of bi-convex lens sheet is contacted with glass substrate, and the bonding force that has by above-mentioned layer of adhesive material is fixed on glass substrate.Consequently, biconvex lens is positioned at a side opposite with glass substrate.
When fitting to bi-convex lens sheet on glass substrate (display floater), must make the pixel set location coupling on these trickle lens and glass substrate.This point is and the Polarizer difference.
In addition, because there being biconvex lens, so bi-convex lens sheet is positive uneven.And, owing to requiring to be formed with thin lenticular maintenance shape originally, therefore do not allow to leave scar or spot in thin lenticular front in the applying operation.Therefore, in the applying of bi-convex lens sheet, can not use the keeping method of the vacuum suction of using in the situations such as Polarizer.
Due to above reason as can be known, in the applying of bi-convex lens sheet, can not use " sticker of used for liquid crystal display element film " of the patent documentation 1 of the keeping method that adopts vacuum suction.Therefore, need development new technologies, perhaps the feature according to bi-convex lens sheet improves.
As one of method, for example consider following method: on the convex curvature face of the Polarizer supporter (curvature head) that uses in the disclosed used for liquid crystal display element apparatus for film adhesion of patent documentation 1, after utilizing bonding force to keep (temporary fixed) bi-convex lens sheet, this curvature head is rotated on glass substrate, thereby bi-convex lens sheet is transferred on glass substrate from the curvature head.In the method, in order to keep bi-convex lens sheet, a little less than being applied to the bonding force (pasting on glass substrate based on this) of bonding force need than the layer of adhesive material at the back side of bi-convex lens sheet on above-mentioned flexure plane, but as mentioned above, be formed with trickle set of lenses in the front of bi-convex lens sheet and have trickle concavo-convexly, the bonding force that therefore is applied on above-mentioned flexure plane needs than much better than without the bonding force in the situation of such concavo-convex Polarizer.
Yet, so, when the curvature head that keeps bi-convex lens sheet is rotated on glass substrate, after bi-convex lens sheet is completed to the transfer (applying) of glass substrate, terminal part with above-mentioned flexure plane of cementability contacts with the opposite face of glass substrate, because of the strong bonding force of above-mentioned flexure plane, glass substrate is easy to be attached on this terminal part and is raised.This is because the continuous rotation of curvature head causes the terminal part of above-mentioned flexure plane to rise.Consequently, bi-convex lens sheet can't normally fit on glass substrate, thus the undesirable condition that the film that forms on the generation glass substrate or distribution are peeled.
Such undesirable condition is the problem that can not produce in the weak situation of the bonding force of the such above-mentioned flexure plane of the applying operation of Polarizer in the past.
the present invention considers as above situation, its purpose is to provide a kind of optical sheet applying method, device and be suitable for this optical sheet applying method, the adhesive sheet of device, will be as bi-convex lens sheet the convex curvature face (optical sheet maintenance face) of tool irregular optical sheet in front by the curvature head keep, and this curvature head is rotated on substrate, thereby when fitting to above-mentioned optical sheet on aforesaid substrate, after above-mentioned optical sheet is completed to the transfer (applying) of aforesaid substrate, can not follow the rising of the terminal part of above-mentioned flexure plane because of the bonding force of above-mentioned flexure plane and mention aforesaid substrate.
In these other purposes of the present invention of writing exactly, can not be able to clearly by the following description and accompanying drawing.
(1) in the 1st viewpoint of the present invention, provide a kind of optical sheet applying method.
This optical sheet applying method utilizes bonding force that optical sheet is remained on the optical sheet maintenance face of curvature head, and above-mentioned curvature head is rotated on substrate, thereby above-mentioned optical sheet is fitted on aforesaid substrate, it is characterized in that possessing following operation:
The adhesive sheet that will have the 1st zone and the 2nd zone is installed on the optical sheet maintenance face of curvature head, wherein, described the 1st zone has the bonding force that can keep optical sheet by the applying operation, and described the 2nd zone has than the bonding force a little less than the bonding force in above-mentioned the 1st zone;
The 1st zone of the above-mentioned adhesive sheet on the front that makes optical sheet and the optical sheet maintenance face that is arranged on above-mentioned curvature head contact, and utilizes bonding force maintenance (temporary fixed) this optical sheet in above-mentioned the 1st zone;
Make the back side and the substrate contacts of the above-mentioned optical sheet of maintenance (temporary fixed) on above-mentioned optical sheet maintenance face, and above-mentioned curvature head is rotated on aforesaid substrate, and the back side integral adhesive that makes above-mentioned optical sheet is on aforesaid substrate; And
Complete make above-mentioned optical sheet back side integral adhesive after the operation on aforesaid substrate, above-mentioned curvature head is further rotated, and above-mentioned optical sheet is isolated from above-mentioned optical sheet maintenance face,
With above-mentioned optical sheet from the operation of above-mentioned optical sheet maintenance face isolation, make the 2nd zone of the above-mentioned adhesive sheet that is arranged on above-mentioned optical sheet maintenance face relative with aforesaid substrate.
In the optical sheet applying method based on the 1st viewpoint of the present invention, the adhesive sheet that will have the 1st zone and the 2nd zone is installed on the optical sheet maintenance face of curvature head, wherein, described the 1st zone has the bonding force that can keep optical sheet by the applying operation, described the 2nd zone has than the bonding force a little less than the bonding force in above-mentioned the 1st zone, contact with the 1st zone by the front that makes optical sheet, and utilize the bonding force in above-mentioned the 1st zone to keep (temporary fixed) this optical sheet.
In addition, after the back side integral adhesive that makes above-mentioned curvature head make above-mentioned optical sheet rotating on aforesaid substrate is to the aforesaid substrate, above-mentioned curvature head is further rotated and with above-mentioned optical sheet from the operation of above-mentioned optical sheet maintenance face isolation, make the 2nd zone of the above-mentioned adhesive sheet that is arranged on above-mentioned optical sheet maintenance face relative with aforesaid substrate.
Therefore, as above-mentioned optical sheet, even use the irregular optical sheet of front tool as bi-convex lens sheet, be adjusted to the value that can positively keep (temporary fixed) this optical sheet by the bonding force with the 1st zone of above-mentioned adhesive sheet, just can and remain to the 1st zone of above-mentioned adhesive sheet and the operation of fitting with the positive bonding of this optical sheet.
In addition, above-mentioned curvature head is further rotated with above-mentioned optical sheet from the operation of above-mentioned optical sheet maintenance face isolation, because the 2nd zone that makes the bonding force above-mentioned adhesive sheet more weak than above-mentioned the 1st zone is relative with aforesaid substrate, therefore by regulating the bonding force in the 2nd zone, even above-mentioned adhesive sheet contacts with aforesaid substrate at that time, also can avoid mentioning aforesaid substrate because of this bonding force.
Consequently, can prevent from mentioning because of the bonding force that above-mentioned adhesive sheet has the undesirable condition that aforesaid substrate causes the undesirable condition that the film that for example, can't normally fit to bi-convex lens sheet on substrate, forms on substrate or distribution are peeled.
In the preference based on the optical sheet applying method of the 1st viewpoint of the present invention, the bonding force in the 1st zone of above-mentioned adhesive sheet is the not enough 240mm of rolling ball method tack test, more preferably below 220mm, the bonding force in the 2nd zone of above-mentioned adhesive sheet is more than rolling ball method tack test 240mm, more preferably more than 260mm.
In other preferences based on the optical sheet applying method of the 1st viewpoint of the present invention, above-mentioned adhesive sheet is rectangle, and above-mentioned the 2nd zone is configured to band shape along a limit of above-mentioned adhesive sheet.
In further other preferences based on the optical sheet applying method of the 1st viewpoint of the present invention, above-mentioned adhesive sheet is rectangle, and above-mentioned the 2nd zone is configured to respectively band shape along two relative limits of above-mentioned adhesive sheet.
In further other preferences based on the optical sheet applying method of the 1st viewpoint of the present invention, above-mentioned adhesive sheet is rectangle, and above-mentioned the 2nd zone is configured to respectively band shape along the four edges of above-mentioned adhesive sheet.
In further other preferences based on the optical sheet applying method of the 1st viewpoint of the present invention, above-mentioned adhesive sheet is rectangle, and above-mentioned the 2nd zone is configured to respectively band shape and shape with one heart along the four edges of above-mentioned adhesive sheet.
In further other preferences based on the optical sheet applying method of the 1st viewpoint of the present invention, above-mentioned adhesive sheet self is divided into relatively strong above-mentioned the 1st zone of bonding force and bonding force above-mentioned the 2nd zone a little less than relatively.
In further other preferences based on the optical sheet applying method of the 1st viewpoint of the present invention, the integral body of above-mentioned adhesive sheet is formed as bonding force relatively strong above-mentioned the 1st zone, form above-mentioned the 2nd zone by relatively weak illusory of bonding force is installed on its part.
In further other preferences based on the optical sheet applying method of the 1st viewpoint of the present invention, aforesaid substrate remains on Substrate table, above-mentioned optical sheet is being set for from the operation of above-mentioned optical sheet maintenance face isolation, above-mentioned adhesive sheet with before aforesaid substrate contacts with the sidewall butt of aforesaid substrate platform, the power that makes above-mentioned adhesive sheet press aforesaid substrate weakens or disappears.
(2) in the 2nd viewpoint of the present invention, provide a kind of optical sheet laminating apparatus.
This optical sheet laminating apparatus utilizes bonding force that optical sheet is remained on the optical sheet maintenance face of curvature head, and above-mentioned curvature head is rotated on substrate, thereby above-mentioned optical sheet is fitted on aforesaid substrate, it is characterized in that,
Above-mentioned optical sheet laminating apparatus comprises: the optical sheet with the convex of bending to keeps the curvature head of face; With the adhesive sheet that is arranged on above-mentioned optical sheet maintenance face,
Above-mentioned adhesive sheet has: the 1st zone, and the 1st zone has the bonding force that can keep optical sheet by the applying operation; With the 2nd zone, the 2nd zone has than the bonding force a little less than the bonding force in above-mentioned the 1st zone,
The back side integral adhesive that makes above-mentioned optical sheet is after on aforesaid substrate, above-mentioned curvature head is further rotated and during from above-mentioned optical sheet maintenance face isolation, make the 2nd zone of the above-mentioned adhesive sheet that is arranged on above-mentioned optical sheet maintenance face relative with aforesaid substrate above-mentioned optical sheet.
In the optical sheet laminating apparatus based on the 2nd viewpoint of the present invention, the adhesive sheet that is arranged on the optical sheet maintenance face of curvature head has: above-mentioned the 1st zone has the bonding force that can keep optical sheet by the applying operation; With above-mentioned the 2nd zone, have than the bonding force a little less than the bonding force in above-mentioned the 1st zone.In addition, the back side integral adhesive that makes above-mentioned optical sheet further rotates above-mentioned curvature head and during from above-mentioned optical sheet maintenance face isolation, makes above-mentioned the 2nd zone relative with aforesaid substrate above-mentioned optical sheet after on aforesaid substrate.
Therefore, as above-mentioned optical sheet, even use the irregular optical sheet of front tool as bi-convex lens sheet, be adjusted to the value that can positively keep (temporary fixed) this optical sheet by the bonding force with the 1st zone of above-mentioned adhesive sheet, just can and remain to the 1st zone of above-mentioned adhesive sheet and the operation of fitting with the positive bonding of this optical sheet.
In addition, above-mentioned curvature head is further rotated with above-mentioned optical sheet from the operation of above-mentioned optical sheet maintenance face isolation, because the 2nd zone that makes the bonding force above-mentioned adhesive sheet more weak than above-mentioned the 1st zone is relative with aforesaid substrate, therefore by regulating the bonding force in the 2nd zone, even above-mentioned adhesive sheet contacts with aforesaid substrate at that time, also can avoid mentioning aforesaid substrate because of this bonding force.
Consequently, can prevent from mentioning because of the bonding force that above-mentioned adhesive sheet has the undesirable condition that aforesaid substrate causes the undesirable condition that the film that for example, can't normally fit to bi-convex lens sheet on substrate, forms on substrate or distribution are peeled.
(3) in the 3rd viewpoint of the present invention, provide a kind of adhesive sheet.
This adhesive sheet is characterised in that, the back side has cementability, utilizes this cementability can bond on the optical sheet maintenance face of curvature head,
The front has cementability, this front possesses the 1st zone and the 2nd zone, above-mentioned the 1st zone forms on the position relative with the optical sheet that keeps (temporary fixed) and has a relatively strong bonding force, the at least a portion in above-mentioned the 2nd zone is positioned at the outside of the scope relative with above-mentioned optical sheet, and the 2nd zone has relatively weak bonding force.
In the adhesive sheet based on the 3rd viewpoint of the present invention, owing to consisting of as described above, as above-mentioned optical sheet, even use the irregular optical sheet of front tool as bi-convex lens sheet, be adjusted to the value that can positively keep (temporary fixed) this optical sheet by the bonding force with the 1st zone of above-mentioned adhesive sheet, just can and remain to the 1st zone of above-mentioned adhesive sheet and the operation of fitting with the positive bonding of this optical sheet.
In addition, above-mentioned curvature head is further rotated with above-mentioned optical sheet from the operation of above-mentioned optical sheet maintenance face isolation, because being positioned at of the 2nd zone of the bonding force above-mentioned adhesive sheet more weak than above-mentioned the 1st zone is relative with aforesaid substrate with the part in the outside of scope corresponding to above-mentioned optical sheet, therefore by regulating the bonding force in the 2nd zone, even above-mentioned adhesive sheet contacts with aforesaid substrate at that time, also can avoid mentioning aforesaid substrate because of this bonding force.
Consequently, can prevent from mentioning because of the bonding force that above-mentioned adhesive sheet has the undesirable condition that aforesaid substrate causes the undesirable condition that the film that for example, can't normally fit to bi-convex lens sheet on substrate, forms on substrate or distribution are peeled.
In the preference based on the adhesive sheet of the 3rd viewpoint of the present invention, the bonding force in above-mentioned the 1st zone is the not enough 240mm of rolling ball method tack test, more preferably below 220mm, the bonding force in above-mentioned the 2nd zone is more than rolling ball method tack test 240mm, more preferably more than 260mm.
In other preferences based on the adhesive sheet of the 3rd viewpoint of the present invention, above-mentioned adhesive sheet is rectangle, and above-mentioned the 2nd zone is configured to band shape along a limit of above-mentioned adhesive sheet.
In further other preferences based on the adhesive sheet of the 3rd viewpoint of the present invention, above-mentioned adhesive sheet is rectangle, and above-mentioned the 2nd zone is configured to respectively band shape along two relative limits of above-mentioned adhesive sheet.
In further other preferences based on the adhesive sheet of the 3rd viewpoint of the present invention, above-mentioned adhesive sheet is rectangle, and above-mentioned the 2nd zone is configured to respectively band shape along the four edges of above-mentioned adhesive sheet.
In further other preferences based on the adhesive sheet of the 3rd viewpoint of the present invention, above-mentioned adhesive sheet is rectangle, and above-mentioned the 2nd zone is configured to respectively band shape and shape with one heart along the four edges of above-mentioned adhesive sheet.
In further other preferences based on the adhesive sheet of the 3rd viewpoint of the present invention, above-mentioned adhesive sheet self is divided into relatively strong above-mentioned the 1st zone of bonding force and bonding force above-mentioned the 2nd zone a little less than relatively.
In further other preferences based on the adhesive sheet of the 3rd viewpoint of the present invention, the integral body of above-mentioned adhesive sheet is formed as bonding force relatively strong above-mentioned the 1st zone, form above-mentioned the 2nd zone by relatively weak illusory of bonding force is installed on its part.
(4) patent documentation 2(TOHKEMY 2010-168079 communique) disclosed " label sticker " is about not wishing on bonding part that non-adhering film this point is installed, with similar based on the adhesive sheet of the 3rd viewpoint of the present invention.But, in patent documentation 2, be on the adhesive surface of label or sheet, non-adhering film to be installed at the object of pasting, on the other hand, in the adhesive sheet based on the 3rd viewpoint of the present invention, be used for to keep installing illusory on the adhesive sheet of optical sheet, therefore obviously different from adhesive sheet based on the 3rd viewpoint of the present invention.
Patent documentation 3(TOHKEMY 2010-066283 communique) disclosed " optical thin film sticker " is about not wishing to make on bonding part its cementability to reduce this point, with similar based on the adhesive sheet of the 3rd viewpoint of the present invention.But, in patent documentation 3, do not wish the initial corresponding, corresponding with the ending of optical sheet applying process in the adhesive sheet based on the 3rd viewpoint of the present invention on the other hand of bonding part and Polarizer applying process, in this, both are obviously different.
according to the optical sheet applying method based on the 1st viewpoint of the present invention, based on the optical sheet laminating apparatus of the 2nd viewpoint of the present invention and based on the adhesive sheet of the 3rd viewpoint of the present invention, has following effect: will remain on the convex curvature face (optical sheet maintenance face) of curvature head by tool irregular optical sheet in front as bi-convex lens sheet, and this curvature head is rotated on substrate, thereby when fitting to above-mentioned optical sheet on aforesaid substrate, after above-mentioned optical sheet is completed to the transfer (applying) of aforesaid substrate, can not follow the rising of the terminal part of above-mentioned flexure plane because of the bonding force of above-mentioned flexure plane and mention aforesaid substrate.
Description of drawings
Fig. 1 (a) means the top view for the front of the adhesive sheet of the optical sheet applying method of the 1st embodiment of the present invention, (b) means the top view at the back side of this adhesive sheet.
Fig. 2 (a) means in the optical sheet applying method of the 1st embodiment of the present invention, by be arranged on adhesive sheet on the curvature head keep optical sheet state, along the cutaway view of the IIA-IIA line of (b), (b) be its upward view.
Fig. 3 represents the key diagram of the optical sheet applying method of the 1st embodiment of the present invention according to operation.
Fig. 4 (a) means the top view for the front of the adhesive sheet of the optical sheet applying method of the 2nd embodiment of the present invention, (b) means the top view at the back side of this adhesive sheet.
Fig. 5 (a) means in the optical sheet applying method of the 2nd embodiment of the present invention, by be arranged on adhesive sheet on the curvature head keep optical sheet state, along the cutaway view of the VA-VA line of (b), (b) be its upward view.
Fig. 6 (a) means the top view for the front of the adhesive sheet of the optical sheet applying method of the 3rd embodiment of the present invention, (b) means the top view at the back side of this adhesive sheet.
Fig. 7 (a) means in the optical sheet applying method of the 3rd embodiment of the present invention, by be arranged on adhesive sheet on the curvature head keep optical sheet state, along the cutaway view of the VIIA-VIIA line of (b), (b) be its upward view.
Fig. 8 (a) means the top view for the front of the adhesive sheet of the optical sheet applying method of the 4th embodiment of the present invention, (b) means the top view at the back side of this adhesive sheet.
Fig. 9 (a) means in the optical sheet applying method of the 4th embodiment of the present invention, install on the curvature head adhesive sheet state, along the cutaway view of the IXA-IXA line of (b), (b) be its upward view.
Figure 10 (a) means the top view for the front of the adhesive sheet of the optical sheet applying method of the 5th embodiment of the present invention, (b) means the top view at the back side of this adhesive sheet.
Figure 11 (a) means in the optical sheet applying method of the 5th embodiment of the present invention, by be arranged on adhesive sheet on the curvature head keep optical sheet state, along the cutaway view of the XIIA-XIIA line of (b), (b) be its upward view.
Figure 12 represents the key diagram of the optical sheet applying method of the 5th embodiment of the present invention according to operation.
Figure 13 (a) means the top view for the front of the adhesive sheet of the optical sheet applying method of the 6th embodiment of the present invention, (b) means the top view at the back side of this adhesive sheet.
Figure 14 (a) means in the optical sheet applying method of the 6th embodiment of the present invention, by be arranged on adhesive sheet on the curvature head keep optical sheet state, along the cutaway view of the XIVA-XIVA line of (b), (b) be its upward view.
Figure 15 (a) means the top view for the front of the adhesive sheet of the optical sheet applying method of the 7th embodiment of the present invention, (b) means the top view at the back side of this adhesive sheet.
Figure 16 (a) means in the optical sheet applying method of the 7th embodiment of the present invention, by be arranged on adhesive sheet on the curvature head keep optical sheet state, along the cutaway view of the XVIA-XVIA line of (b), (b) be its upward view.
Figure 17 represents the key diagram of the optical sheet applying method of the 8th embodiment of the present invention according to operation.
The specific embodiment
Below, with reference to accompanying drawing, the preferred embodiment of the present invention is described in detail.
(the 1st embodiment)
Fig. 1～Fig. 3 represents the optical sheet applying method of the 1st embodiment of the present invention.At this, as positive (maintenance face) uneven optical sheet 10, use to have concavo-convex bi-convex lens sheet because trickle lens are positive, use liquid crystal panel as glass substrate 50.In addition, use the curvature 20 with the structure shown in Fig. 2 (a).
Curvature 20 is as shown in Fig. 2 (a), and whole cross sectional shape is roughly the T font, and it possesses: bar-shaped support portion 20a can engage with the rotating shaft 21 of level rotationally; Rotation section 20b has the flexure plane (having predetermined curvature) of dome arcuation as " optical sheet maintenance face " in the outside.Curvature 20 can be around rotating shaft 21 rotations in vertical face.It is bi-convex lens sheet at this that the optical sheet of rotation section 20b keeps mask to have than the optical sheet 10(that fits) slightly large length and width.
The optical sheet that is arranged on the dome arcuation on the rotation section 20b of curvature 20 keeps face integral body to be covered by adhesive sheet 30.The front of adhesive sheet 30 and back side both sides all have cementability, keep face by making its back side bond to optical sheet, and are installed on optical sheet maintenance face.The front of adhesive sheet 30 is used for keeping (temporary fixed) to keep face to optical sheet optical sheet 10 by bonding force.
The adhesive sheet 30 of using in this 1st embodiment has structure as shown in Figure 1.That is, the global shape of adhesive sheet 30 is rectangle, and its size is to keep the area of face identical with the optical sheet of curvature 20.Therefore, if adhesive sheet 30 is installed on optical sheet maintenance face, as shown in Figure 2, whole optical sheet keeps face to be covered by adhesive sheet 30.
Bond to (to fix by bonding force) on optical sheet maintenance face by the back side with adhesive sheet 30 and carry out adhesive sheet 30 to the installation of optical sheet maintenance face.For this reason, be furnished with known adhesives at the Bei of adhesive sheet 30 Mian Tu, apply predetermined bonding force.This bonding intensity of force is required to be by optical sheet 10 and is liquid crystal panel with respect to glass substrate 50(at this) the applying operation degree that can not be peeled.
The front of adhesive sheet 30 and the adhesives at the back side form respectively the adhesive linkage that produces predetermined bonding force.Just looking like shown in Fig. 1 (a) of adhesive sheet 30 is divided into the 1st regional 30a of the relatively strong rectangle of bonding force and bonding force the 2nd regional 30b of weak rectangle relatively.The area of Area Ratio the 1st regional 30a of the 2nd regional 30b is much smaller.The bonding force of the 1st regional 30a is in its whole approximate equality.The bonding force of the 2nd regional 30a is also in its whole approximate equality.
The 1st regional 30a in the front of adhesive sheet 30 is for being used for keeping the zone of (temporary fixed) optical sheet 10, if the front of optical sheet 10 is pressed on the 1st regional 30a, even be the irregular optical sheet 10 of front tool, also can positively keep this state by the bonding force of the 1st regional 30a.As shown in Fig. 2 (b), make whole of optical sheet 10 to contact with the 1st regional 30a and it is bonding, maintenance.
The 2nd regional 30b in the front of adhesive sheet 30 forms, and after the whole face with optical sheet 10 fitted to glass substrate 50, the 2nd regional 30b was disposed at the part that the optical sheet of curvature 20 keeps face to contact with substrate 50.Therefore, as shown in Fig. 2 (b), optical sheet 10 is not installed into and contacts with the 2nd regional 30b.
With the bonding force of the 1st regional 30a be set as can with for example as bi-convex lens sheet the front have trickle concavo-convex and uneven optical sheet 10 and positively keep (temporary fixed) value to the optical sheet maintenance face of curvature 20, particularly, be set as at the lower not enough 240mm of rolling ball method tack (rolling tack) test (JIS specification).Therefore, by this strong bonding force, even positive uneven optical sheet 10 also can stably keep (temporary fixed) on curvature 20.If bonding force equals 240mm under rolling ball method tack test or on it, bonding force is not enough and optical sheet 10 positively can not be temporarily anchored on curvature 20, thereby in the way of applying process, the problem of optical sheet 10 easily occurs to peel from curvature 20.
The bonding force of the 1st regional 30a is more preferably below 220mm under the test of rolling ball method tack.This be because, if bonding force in this scope, just can more positively temporarily anchor to optical sheet 10 on curvature 20.
A little less than the bonding force of the 2nd regional 30b is set as bonding force than the 1st regional 30a, particularly, be more than 240mm under the test of rolling ball method tack.Therefore, after optical sheet 10 and glass substrate 50 are fitted, even the 2nd regional 30b contacts with glass substrate 50, also be difficult to by this bonding force, glass substrate 50 be mentioned.
The bonding force of the 2nd regional 30b is more preferably more than 260mm under the test of rolling ball method tack.If bonding force in this scope, can prevent following unfavorable condition: the glass substrate 50 that contacts with the 2nd regional 30b is raised because of this bonding force, and perhaps the lip-deep distribution of glass substrate 50, film are damaged because this bonding force peels.
After the whole face with optical sheet 10 fits to glass substrate 50, the reason that the 2nd regional 30b only is set in the position that contacts with glass substrate 50 is, this position is the part of the above-mentioned unfavorable conditions such as peeling off of the distribution that the most easily causes glass substrate 50, film and damage.Like this, in this 1st embodiment, it is not the whole periphery that is formed at the 1st regional 30a due to the 2nd regional 30b, therefore have advantages of following: also bonding by being alignd with the boundary line of the 1st regional 30a and the 2nd regional 30b in one side (end edge) of optical sheet as shown in Fig. 2 (b), also can tackle easily when changing the size of the optical sheet 10 of fitting, and need to just not change adhesive sheet 30 when changing the size of optical sheet 10.
Next, with reference to Fig. 3, the optical sheet applying method of this 1st embodiment is described.
At first, as shown in Fig. 3 (a), the back side of adhesive sheet 30 is bonded in be arranged on the optical sheet maintenance face of the dome arcuation on the rotation section 20b of curvature 20, and adhesive sheet 30 is installed.Thus, whole optical sheet keeps face to be covered by adhesive sheet 30.Adhesive sheet 30 and optical sheet keep the shape of face corresponding and bend to the dome arcuation.At this moment, make the 2nd regional 30b in the front of adhesive sheet 30 come the rear with respect to directions that make curvature 20 rotation.
Next, the front that makes optical sheet 10 is pressed and is bonded on the front of the adhesive sheet 30 of installing on the optical sheet maintenance face of curvature 20, thus with optical sheet 10 temporary fixed (maintenance) to optical sheet maintenance face.Under this state, due to adhesive sheet 30 just bend to convex facing to the below, therefore, the optical sheet 10 that is temporarily fixed is crooked too.
When this optical sheet 10 is temporary fixed, as Fig. 2 (b) clearly represents, alignd with the limit in the place ahead of the 2nd regional 30b in the front of adhesive sheet 30 (border of the 1st regional 30a and the 2nd regional 30b) in one side of optical sheet 10.Consequently, the non-overlapping portion of exposing adhesive sheet 30 around optical sheet 10.Particularly, expose the remainder of the 1st relatively strong regional 30a of bonding force on front, the left side and the right of optical sheet 10, expose the 2nd relatively weak regional 30b of bonding force in its back.
Next, detect the position that is temporarily fixed at the optical sheet 10 on curvature 20 with known method, and detect simultaneously the position of glass substrate 50.Then, based on detected data, in the following way optical sheet 10 is fitted on the preposition on glass substrate 50.
That is, as shown in Fig. 3 (b), make curvature 20 around rotating shaft 21 rearward rotation at a predetermined angle, until the front end of optical sheet 10 becomes approximate horizontal.At this moment, curvature 20 tilted rearward.On the other hand, glass substrate 50 proper levels are moved.Then, make the front end that is temporarily fixed at the optical sheet 10 on curvature 20 and the front end butt of the predetermined fit area on glass substrate 50.Fig. 3 (b) expression state at this moment.
After this, if glass substrate 50 is forwards moved horizontally from the butt state, curvature 20 is around rotating shaft 21 rotations thereupon, and rotation section 20b rotates on glass substrate 50.Follow this situation, the bonding force of the optical sheet 10 on curvature 20 by its back side little by little shifts to glass substrate 50 from curvature 20.
As shown in Fig. 3 (c), if rotating to the rear end of optical sheet 10, curvature 20 becomes approximate horizontal, the integral body of optical sheet 10 is fitted on glass substrate 50.Under this state, curvature 20 a forwards inclination.
After just becoming the state shown in Fig. 3 (c), the 2nd regional 30b of the adhesive sheet 30 of curvature 20 is relative with glass substrate 50, and then contacts with pressing force between glass substrate 50 by being applied to curvature 20.But, the bonding force of the 2nd regional 30b by suitable adjusting a little less than than the bonding force of the 1st regional 30a, can not exist bonding force because of the 2nd regional 30b to cause glass substrate 50 to be raised or situation that the film on the surface of glass substrate 50 is peeled, therefore can not produce the damage that causes because of above-mentioned situation.
Optical sheet 10 is to carry out with good precision to the applying of glass substrate 50 naturally.
As mentioned above, in the optical sheet applying method of the 1st embodiment of the present invention, prepare front and back side both sides and all have the adhesive sheet 30 of cementability, be formed with the 2nd relatively weak regional 30b of the 1st relatively strong regional 30a of bonding force and bonding force in the front of this adhesive sheet 30.And, bond to by the back side with adhesive sheet 30 on the optical sheet maintenance face of dome arcuation of curvature 20, and adhesive sheet 30 be installed on optical sheet maintenance face.
Then, in the 1st regional 30a of the adhesive sheet 30 on being arranged on optical sheet maintenance face, utilize the temporary fixed optical sheet 10 of bonding force.At this moment, alignd with the limit (border of the 1st regional 30a and the 2nd regional 30b) in the place ahead of the 2nd regional 30b in the front of adhesive sheet 30 in the one side in the place ahead of optical sheet 10.
Further, make the front end that is temporarily fixed at the optical sheet 10 on curvature 20 and the front end butt of the predetermined fit area on glass substrate 50, then by glass substrate 50 is forwards moved horizontally, the rotation section 20b of curvature 20 is rotated on glass substrate 50.Like this, by its positive bonding force, optical sheet 10 is fitted on glass substrate 50 from curvature 20.
Alignd with the one side in the place ahead of the 2nd regional 30b of adhesive sheet 30 in one side of optical sheet 10, and utilize bonding force to temporarily anchor to the 1st regional 30a of adhesive sheet 30, therefore after just the integral plaster of optical sheet 10 being incorporated into glass substrate 50, the 2nd regional 30b of weak adhesive sheet 30 is relative with glass substrate 50 relatively also contacts for bonding force.Therefore, adhesive sheet 30 is during to glass substrate 50 contact, can not cause glass substrate 50 to be raised because of the bonding force of the 2nd regional 30b or the film on the surface of glass substrate 50 is peeled, and therefore can not produce the damage that causes because of above-mentioned situation.In addition, optical sheet 10 carries out with good precision to the applying of glass substrate 50.
In addition, in this 1st embodiment, after optical sheet 10 was fitted to glass substrate 50, the 2nd regional 30b of adhesive sheet 30 only was set in the position that contacts with glass substrate 50, and this is because this position the most easily causes above-mentioned unfavorable condition.In addition, in the way of applying operation, due to by curvature 20 from pressing applying optical sheet 10, even the 1st regional 30a that therefore exposes at the outer peripheral portion of optical sheet 10 contacts with relative glass substrate 50, can not produce the phenomenon of mentioning substrate 50 yet.
(the 2nd embodiment)
Fig. 4 and Fig. 5 represent the optical sheet applying method of the 2nd embodiment of the present invention.At this, also use bi-convex lens sheet as optical sheet 10, use liquid crystal panel as glass substrate 50.In addition, curvature 20 with use in above-mentioned the 1st embodiment identical, use adhesive sheet 30A to replace adhesive sheet 30.
The adhesive sheet 30A that uses in this 2nd embodiment has structure as shown in Figure 4, and is except the 2nd regional 30Ab is formed at respectively the front and back this point of adhesive sheet 30A, identical with the adhesive sheet 30 of using in above-mentioned the 1st embodiment.Two the 2nd regional 30Ab are roughly the same shape and roughly the same size.
In the optical sheet applying method of this 2nd embodiment, when temporarily anchoring on the front of the adhesive sheet 30A that the optical sheet maintenance face of curvature 20 is installed, as Fig. 5 (b) clearly represents, alignd with the limit in the place ahead of the 2nd regional 30Ab in the front of adhesive sheet 30A (border of the 2nd regional 30Ab of the 1st regional 30Aa and rear avris) in one side of optical sheet 10.Consequently, the non-overlapping portion of exposing adhesive sheet 30A around optical sheet 10.Particularly, the remainder that exposes the 1st relatively strong regional 30Aa of bonding force on the left side and the right of optical sheet 10, in its front and the back expose the 2nd relatively weak regional 30Ab of bonding force.In addition, identical with the optical sheet applying method of above-mentioned the 1st embodiment, therefore the description thereof will be omitted.
Obviously, in the optical sheet applying method of this 2nd embodiment, can obtain the effect identical with the optical sheet applying method of above-mentioned the 1st embodiment.
(the 3rd embodiment)
Fig. 6 and Fig. 7 represent the optical sheet applying method of the 3rd embodiment of the present invention.At this, also use bi-convex lens sheet as optical sheet 10, use liquid crystal panel as glass substrate 50.In addition, curvature 20 with use in above-mentioned the 1st embodiment identical, use adhesive sheet 30B to replace adhesive sheet 30.
The adhesive sheet 30B that uses in this 3rd embodiment has structure as shown in Figure 6, except the 2nd regional 30Bb forms surrounding (this is equivalent to front, back, the left side and the right that the 2nd regional 30Bb the is formed at adhesive sheet 30B) this point of surrounding adhesive sheet 30B, identical with the adhesive sheet 30 of using in above-mentioned the 1st embodiment.
In the optical sheet applying method of this 3rd embodiment, when temporarily anchoring on the front of the adhesive sheet 30B that the optical sheet maintenance face of curvature 20 is installed, as Fig. 7 (b) clearly represents, alignd with the limit in the place ahead of the 2nd regional 30Bb in the front of adhesive sheet 30B (portion boundary that is positioned at the back of the 1st regional 30Ba and the 2nd regional 30Bb) in one side of optical sheet 10.Consequently, expose the non-overlapping portion of adhesive sheet 30B around optical sheet 10, in the left side, the right and the front thereof of optical sheet 10, the back is in abutting connection with the 2nd relatively weak regional 30Bb of bonding force.Do not expose the 1st relatively strong regional 30Ba of bonding force.Reason is size and the 1st regional 30Ba big or small identical of optical sheet 10.
Obviously, in the optical sheet applying method of this 3rd embodiment, can obtain the effect identical with the optical sheet applying method of above-mentioned the 1st embodiment.
(the 4th embodiment)
Fig. 8 and Fig. 9 represent the optical sheet applying method of the 4th embodiment of the present invention.At this, also use bi-convex lens sheet as optical sheet 10, use liquid crystal panel as glass substrate 50.In addition, curvature 20 with use in above-mentioned the 1st embodiment identical, use adhesive sheet 30C to replace adhesive sheet 30.
The adhesive sheet 30C that uses in this 4th embodiment has structure as shown in Figure 8, is formed with three the 1st regional 30Ca, three the 2nd regional 30Cb.The 1st the most inboard regional 30Ca is rectangle, is positioned at second the 1st regional 30Ca in its outside for surrounding the rectangular ring of the 1st the most inboard regional 30Ca, is positioned at the 3rd the 1st regional 30Ca in its outside for surrounding the rectangular ring of second the 1st regional 30Ca.They are by shape ground configuration with one heart.
The 2nd the most inboard regional 30Cb is rectangular ring between the 1st the most inboard regional 30Ca and second the 1st regional 30Ca.Second the 2nd regional 30Cb is rectangular ring between second the 1st regional 30Ca and the 3rd the 1st regional 30Ca.The outermost the 2nd regional 30Cb is rectangular ring between the outer peripheral edges of the 3rd the 1st regional 30Ca and adhesive sheet 30.
The adhesive sheet 30C that uses in this 4th embodiment has appended the 2nd regional 30Cb of two rectangular rings with one heart at the 1st regional 30Ca that is arranged in the inboard in the adhesive sheet 30B that uses in above-mentioned the 3rd embodiment.
In the optical sheet applying method of this 4th embodiment, when temporarily anchoring on the front of the adhesive sheet 30C that the optical sheet maintenance face of curvature 20 is installed, as Fig. 7 (b) clearly represents, alignd with the limit in the place ahead that is positioned at outermost the 2nd regional 30Cb in the front of adhesive sheet 30C (being positioned at the back on the outermost the 2nd regional 30Cb and the border of the 1st regional 30Cb that is adjacent) in one side of optical sheet 10.Consequently, expose the non-overlapping portion of adhesive sheet 30C around optical sheet 10, expose the 2nd relatively weak regional 30Cb of bonding force in the left side, the right and front thereof, the back of optical sheet 10.Do not expose the 1st relatively strong regional 30Ca of bonding force.Reason be optical sheet 10 size be positioned at the big or small identical of outermost the 1st regional 30Ca.
Obviously, in the optical sheet applying method of this 4th embodiment, can obtain the effect identical with the optical sheet applying method of above-mentioned the 1st embodiment.Further, advantage corresponding to optical sheet 10 that existence can be different from several sizes.
(the 5th embodiment)
Figure 10 ~ Figure 12 represents the optical sheet applying method of the 5th embodiment of the present invention.At this, also use bi-convex lens sheet as optical sheet 10, use liquid crystal panel as glass substrate 50.In addition, curvature 20 with use in above-mentioned the 1st embodiment identical, use adhesive sheet 30D to replace adhesive sheet 30.
The adhesive sheet 30D that uses in this 5th embodiment has structure as shown in figure 10, by near illusory film (dummy film) 40 formation the 2nd regional 30Db of the rectangle the back that is fixed on adhesive sheet 30D.That is, the 1st regional 30Da is formed at the whole front of adhesive sheet 30D, only covers illusory film 40 near the back of adhesive sheet 30D, and the bonding force of this part is 0.Therefore, can be described as at the 2nd regional 30Db of the part formation of disposing illusory film 40 without bonding force.The thickness of the thickness of illusory film 40 and optical sheet 10 is roughly the same.
In the optical sheet applying method of this 5th embodiment, when temporarily anchoring on the front of the adhesive sheet 30D that the optical sheet maintenance face of curvature 20 is installed, as Figure 11 (b) clearly represents, with limit (border of the 1st regional 30Da and the 2nd regional 30Db) (parallel) configuration in the place ahead of the 2nd regional 30Db in the front of the edge adhesive sheet 30D of optical sheet 10D.Vacate a small gap between optical sheet 10 and illusory film 40.Consequently, the non-overlapping portion of exposing adhesive sheet 30D around optical sheet 10.Particularly, expose the remainder of the 1st relatively strong regional 30Da of bonding force in the left side, the right and the front of optical sheet 10, expose the 2nd illusory film 40 of regional 30Db(without bonding force in its back).The remainder that also exposes the 1st regional 30Da in gap between optical sheet 10 and illusory film 40.
As mentioned above, in the optical sheet applying method of the 5th embodiment of the present invention, prepare the adhesive sheet 30D that front and back side both sides all have cementability, be formed with the 1st stronger regional 30Da of bonding force in the front of this adhesive sheet 30 and without the 2nd regional 30Db of bonding force.And, bond to by the back side with adhesive sheet 30D on the optical sheet maintenance face of dome arcuation of curvature 20, and adhesive sheet 30D be installed on optical sheet maintenance face.
Then, in the 1st regional 30Da of the adhesive sheet 30D on being arranged on optical sheet maintenance face, utilize the temporary fixed optical sheet 10 of bonding force.At this moment, with limit (border of the 1st regional 30Da and the 2nd regional 30Db) configured in parallel in one side with the place ahead of the 2nd regional 30Db in the front of adhesive sheet 30D in the place ahead of optical sheet 10.
Further, make the front end that is temporarily fixed at the optical sheet 10 on curvature 20 and the front end butt of the predetermined fit area on glass substrate 50, glass substrate 50 is forwards moved horizontally, thereby the rotation section 20b of curvature 20 is rotated on glass substrate 50.Like this, by its positive bonding force, optical sheet 10 is fitted on glass substrate 50 from curvature 20.
Alignd with the one side in the place ahead of the 2nd regional 30Db of adhesive sheet 30D in one side of optical sheet 10, and utilize bonding force to temporarily anchor in the 1st regional 30Da of adhesive sheet 30D, therefore after just the integral plaster of optical sheet 10 being incorporated into glass substrate 50, without the 2nd illusory film 40 of regional 30Db(of bonding force) relatively with glass substrate 50 also contact.Therefore, adhesive sheet 30D is during to glass substrate 50 contact, can not cause glass substrate 50 to be raised because of the bonding force of the 2nd regional 30Db or the film on the surface of glass substrate 50 is peeled, thereby can not produce the damage that therefore causes.In addition, optical sheet 10 carries out with good precision to the applying of glass substrate 50.
(the 6th embodiment)
Figure 13 and Figure 14 represent the optical sheet applying method of the 6th embodiment of the present invention.At this, also use bi-convex lens sheet as optical sheet 10, use liquid crystal panel as glass substrate 50.In addition, curvature 20 with use in above-mentioned the 1st embodiment identical, use adhesive sheet 30E to replace adhesive sheet 30.
The adhesive sheet 30E that uses in this 6th embodiment has structure as shown in figure 13, and is except the 2nd regional 30Eb is formed at respectively the front and back this point of adhesive sheet 30, identical with the adhesive sheet 30D that uses in above-mentioned the 5th embodiment.Two the 2nd regional 30Eb are identical shape and identical size.
In the optical sheet applying method of this 6th embodiment, when temporarily anchoring on the front of the adhesive sheet 30E that the optical sheet maintenance face of curvature 20 is installed, as Figure 14 (b) clearly represents, make one side of optical sheet 10 parallel with the limit in the place ahead of the 2nd regional 30Eb in the front of adhesive sheet 30E (border of the 2nd regional 30Eb of the 1st regional 30Ea and rear avris).Consequently, the non-overlapping portion of exposing adhesive sheet 30E around optical sheet 10.Particularly, the remainder that exposes the 1st relatively strong regional 30Ea of bonding force on the left side and the right of optical sheet 10, in its front and the back expose the 2nd regional 30Eb without bonding force.In addition, identical with the optical sheet applying method of above-mentioned the 1st embodiment, therefore the description thereof will be omitted.
Obviously, in the optical sheet applying method of this 6th embodiment, can obtain the effect identical with the optical sheet applying method of above-mentioned the 5th embodiment.
(the 7th embodiment)
Figure 15 and Figure 16 represent the optical sheet applying method of the 7th embodiment of the present invention.At this, also use bi-convex lens sheet as optical sheet 10, use liquid crystal panel as glass substrate 50.In addition, curvature 20 with use in above-mentioned the 1st embodiment identical, use adhesive sheet 30F to replace adhesive sheet 30D.
The adhesive sheet 30F that uses in this 7th embodiment has structure as shown in figure 15, except the 2nd regional 30Fb is formed at respectively front, back and the right and left this point of adhesive sheet 30F, identical with the adhesive sheet 30D that uses in above-mentioned the 5th embodiment.Two the 2nd regional 30Fb that are positioned at front and back are mutually the same shape, size.Two the 2nd regional 30Fb that are positioned at the left side and the right also are mutually the same shape, size.
In the optical sheet applying method of this 7th embodiment, when temporarily anchoring on the front of the adhesive sheet 30F that the optical sheet maintenance face of curvature 20 is installed, as Figure 16 (b) clearly represents, alignd with four limits of the 2nd regional 30Fb in the front of adhesive sheet 30F (border of the 2nd regional 30Fb of the 1st regional 30Fa and rear avris) in four limits of optical sheet 10 respectively.Consequently, the non-overlapping portion of exposing adhesive sheet 30F around optical sheet 10, particularly, expose the 2nd illusory film 40 of regional 30FB(without bonding force in the left side, the right, front and the back of optical sheet 10), the part beyond those the 2nd regional 30FB is exposed the 1st regional 30Fa.In addition, with the optical sheet applying method of above-mentioned the 5th embodiment just as, therefore the description thereof will be omitted.
Obviously, in the optical sheet applying method of this 7th embodiment, can obtain the effect identical with the optical sheet applying method of above-mentioned the 5th embodiment.
(the 8th embodiment)
Figure 17 represents the optical sheet applying method of the 8th embodiment of the present invention.At this, also use bi-convex lens sheet as optical sheet 10, use liquid crystal panel as glass substrate 50.In addition, curvature 20 and adhesive sheet 30D all with use in above-mentioned the 5th embodiment identical.
In this 8th embodiment, keep the shape of the Substrate table 60 of glass substrate 50 to have feature.That is, as shown in Figure 17 (a), the upper surface of the sidewall 60a of Substrate table 60 is higher than the upper surface of the glass substrate 50 that remains on Substrate table 60 inboards, and its difference in height is d.The thickness of this difference in height d and the optical sheet 10 of fitting and the thickness of illusory film 40 are about equally.
In the optical sheet applying method of this 8th embodiment, when temporarily anchoring on the front of the adhesive sheet 30D that the optical sheet maintenance face of curvature 20 is installed, as Figure 17 (b) clearly represents, make the 2nd illusory film 40 of regional 30Db(in one side with the front of adhesive sheet 30 of optical sheet 10) limit (border of the 2nd regional 30Db of the 1st regional 30Da and the rear avris) configured in parallel in the place ahead.Consequently, the non-overlapping portion of exposing adhesive sheet 30D around optical sheet 10.Particularly, as shown in Figure 11 (b), expose the remainder of the 1st relatively strong regional 30Da of bonding force in the left side, the right and the front of optical sheet 10, expose the 2nd regional 30b without bonding force in its back.
Then, curvature 20 is rotated on glass substrate 50, when fitting to the whole face of optical sheet 10 on glass substrate 50, as shown in Figure 17 (b), the 2nd illusory film 40 of regional 30Db(of the adhesive sheet 30D of curvature 20) relatively with glass substrate 50 also contact.In this 8th embodiment, due to the sidewall 60a of the Substrate table 60 surperficial high d than glass substrate 50, so the 2nd illusory film 40 of regional 30b(of adhesive sheet 30D) with the sidewall 60a butt of Substrate table 60.
Therefore, under the state of Figure 11 (b), not only curvature 20 power of pressing glass substrate 50 reduce, and have also acted on the power that curvature 20 is pulled away from from glass substrate 50.Generally, the rotation that is accompanied by curvature 20 may be mentioned glass substrate 50, but fully impossible in the present embodiment.And, can not be accompanied by the rotation of curvature 20 yet and cause the position deviation of glass substrate 50.
(variation)
The the 1st～the 8th above-mentioned embodiment represents example that the present invention is specialized.Therefore, the present invention is not limited to these embodiments, can carry out various distortion in the situation that do not break away from purport of the present invention.
For example, in the above-described embodiment, use and resolve the curvature head that mask has the optical sheet maintenance face that bends to the dome arcuation, but be not limited to this.Keep face as long as have the optical sheet that bends to the dome arcuation, can use curvature head arbitrarily.For example, also can use global shape is columnar curvature head.

Claims (18)

1. an optical sheet applying method, utilize bonding force that optical sheet is remained on the optical sheet maintenance face of curvature head, and above-mentioned curvature head is rotated on substrate, thereby above-mentioned optical sheet is fitted on aforesaid substrate, it is characterized in that possessing following operation:
The adhesive sheet that will have the 1st zone and the 2nd zone is installed on the optical sheet maintenance face of curvature head, wherein, described the 1st zone has the bonding force that can keep optical sheet by the applying operation, and described the 2nd zone has than the bonding force a little less than the bonding force in above-mentioned the 1st zone;
The 1st zone of the above-mentioned adhesive sheet on the front that makes optical sheet and the optical sheet maintenance face that is arranged on above-mentioned curvature head contact, and utilizes bonding force maintenance (temporary fixed) this optical sheet in above-mentioned the 1st zone;
Make the back side and the substrate contacts of the above-mentioned optical sheet of maintenance (temporary fixed) on above-mentioned optical sheet maintenance face, and above-mentioned curvature head is rotated on aforesaid substrate, and the back side integral adhesive that makes above-mentioned optical sheet is on aforesaid substrate; And
Complete make above-mentioned optical sheet back side integral adhesive after the operation on aforesaid substrate, above-mentioned curvature head is further rotated, and above-mentioned optical sheet is isolated from above-mentioned optical sheet maintenance face,
With above-mentioned optical sheet from the operation of above-mentioned optical sheet maintenance face isolation, make the 2nd zone of the above-mentioned adhesive sheet that is arranged on above-mentioned optical sheet maintenance face relative with aforesaid substrate.
2. optical sheet applying method according to claim 1, wherein,
The bonding force in the 1st zone of above-mentioned adhesive sheet is the not enough 240mm of rolling ball method tack test, and the bonding force in the 2nd zone of above-mentioned adhesive sheet is more than rolling ball method tack test 240mm.
3. optical sheet applying method according to claim 1 and 2, wherein,
Above-mentioned adhesive sheet is rectangle, and above-mentioned the 2nd zone is configured to band shape along a limit of above-mentioned adhesive sheet.
4. optical sheet applying method according to claim 1 and 2, wherein,
Above-mentioned adhesive sheet is rectangle, and above-mentioned the 2nd zone is configured to respectively band shape along two relative limits of above-mentioned adhesive sheet.
5. optical sheet applying method according to claim 1 and 2, wherein,
Above-mentioned adhesive sheet is rectangle, and above-mentioned the 2nd zone is configured to respectively band shape along the four edges of above-mentioned adhesive sheet.
6. optical sheet applying method according to claim 1 and 2, wherein,
Above-mentioned adhesive sheet is rectangle, and above-mentioned the 2nd zone is configured to respectively band shape and shape with one heart along the four edges of above-mentioned adhesive sheet.
7. the described optical sheet applying method of any one according to claim 1 ~ 6, wherein,
Above-mentioned adhesive sheet self is divided into relatively strong above-mentioned the 1st zone of bonding force and above-mentioned 2nd zone of bonding force a little less than relatively.
8. the described optical sheet applying method of any one according to claim 1 ~ 6, wherein,
The integral body of above-mentioned adhesive sheet is formed as bonding force relatively strong above-mentioned the 1st zone, form above-mentioned the 2nd zone by relatively weak illusory of bonding force is installed on its part.
9. the described optical sheet applying method of any one according to claim 1 ~ 8, wherein,
Aforesaid substrate remains on Substrate table,
Above-mentioned optical sheet is being set for from the operation of above-mentioned optical sheet maintenance face isolation, above-mentioned adhesive sheet with before aforesaid substrate contacts with the sidewall butt of aforesaid substrate platform, the power that makes above-mentioned adhesive sheet press aforesaid substrate weakens or disappears.
10. an optical sheet laminating apparatus, utilize bonding force that optical sheet is remained on the optical sheet maintenance face of curvature head, and above-mentioned curvature head is rotated on substrate, thereby above-mentioned optical sheet is fitted on aforesaid substrate, it is characterized in that,
Above-mentioned optical sheet laminating apparatus comprises: the optical sheet with the convex of bending to keeps the curvature head of face; With the adhesive sheet that is arranged on above-mentioned optical sheet maintenance face,
Above-mentioned adhesive sheet has: the 1st zone, and the 1st zone has the bonding force that can keep optical sheet by the applying operation; With the 2nd zone, the 2nd zone has than the bonding force a little less than the bonding force in above-mentioned the 1st zone,
The back side integral adhesive that makes above-mentioned optical sheet is after on aforesaid substrate, above-mentioned curvature head is further rotated and during from above-mentioned optical sheet maintenance face isolation, make the 2nd zone of the above-mentioned adhesive sheet that is arranged on above-mentioned optical sheet maintenance face relative with aforesaid substrate above-mentioned optical sheet.
11. an adhesive sheet is characterized in that,
The back side has cementability, utilizes this cementability can bond on the optical sheet maintenance face of curvature head,
The front has cementability, this front possesses the 1st zone and the 2nd zone, above-mentioned the 1st zone forms on the position relative with the optical sheet that keeps (temporary fixed) and has a relatively strong bonding force, the at least a portion in above-mentioned the 2nd zone is positioned at the outside of the scope relative with above-mentioned optical sheet, and the 2nd zone has relatively weak bonding force.
12. adhesive sheet according to claim 11, wherein,
The bonding force in the 1st zone of above-mentioned adhesive sheet is the not enough 240mm of rolling ball method tack test, and the bonding force in the 2nd zone of above-mentioned adhesive sheet is more than rolling ball method tack test 240mm.
13. according to claim 11 or 12 described adhesive sheets, wherein,
Above-mentioned adhesive sheet is rectangle, and above-mentioned the 2nd zone is configured to band shape along a limit of above-mentioned adhesive sheet.
14. according to claim 11 or 12 described adhesive sheets, wherein,
Above-mentioned adhesive sheet is rectangle, and above-mentioned the 2nd zone is configured to respectively band shape along two relative limits of above-mentioned adhesive sheet.
15. according to claim 11 or 12 described adhesive sheets, wherein,
Above-mentioned adhesive sheet is rectangle, and above-mentioned the 2nd zone is configured to respectively band shape along the four edges of above-mentioned adhesive sheet.
16. according to claim 11 or 12 described adhesive sheets, wherein,
Above-mentioned adhesive sheet is rectangle, and above-mentioned the 2nd zone is configured to respectively band shape and shape with one heart along the four edges of above-mentioned adhesive sheet.
17. the described adhesive sheet of any one according to claim 11 ~ 16, wherein,
Above-mentioned adhesive sheet self is divided into relatively strong above-mentioned the 1st zone of bonding force and above-mentioned 2nd zone of bonding force a little less than relatively.
18. the described adhesive sheet of any one according to claim 11 ~ 16, wherein,
The integral body of above-mentioned adhesive sheet is formed as bonding force relatively strong above-mentioned the 1st zone, form above-mentioned the 2nd zone by relatively weak illusory of bonding force is installed on its part.
CN201210430963.6A 2011-11-05 2012-11-01 Optical sheet applying method, device and the adhesive sheet used thereof Active CN103085438B (en)

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