CN1311257C - Method for making laminated polarized optical film - Google Patents
Method for making laminated polarized optical film Download PDFInfo
- Publication number
- CN1311257C CN1311257C CNB03131015XA CN03131015A CN1311257C CN 1311257 C CN1311257 C CN 1311257C CN B03131015X A CNB03131015X A CN B03131015XA CN 03131015 A CN03131015 A CN 03131015A CN 1311257 C CN1311257 C CN 1311257C
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- CN
- China
- Prior art keywords
- film
- polarized light
- linearly polarized
- lamination
- diffusion barrier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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
- G02F1/133528—Polarisers
-
- 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
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Polarising Elements (AREA)
Abstract
The present invention provides a method for producing laminated polarization film which prevents the occurrence of a substantially reverse curl. The method for producing the laminated polarization film in which a plane polarization film and a plane polarization separation film are stacked one on the other includes a moisture content adjustment process in which the moisture content of the plane polarization separation film is adjusted to 0.3 to 0.8 weight % before they are stacked.
Description
Technical field
The present invention relates to a kind of on the light source side surface of the liquid crystal cells that constitutes display panels the manufacture method of the lamination polarization film of bonding lamination.
Background technology
As shown in Figure 1, cementing line polarization film on the light source side surface that constitutes display panels.That is, on the light source side surface of liquid crystal cells 10, constitute display panels by bond layer 12 adhesive linkage line ball polarization films 14.For display panels, people require image consumption electric power distincter or light source further to reduce year by year.So, in order to reduce the consumption electric power of display panels light source, with the light that effectively is used to from light source is purpose, use the light source side of online polarization film at present, in case reflection and linearly polarized light film see through the uneven light of axle, bonding lamination is used for seeing through by the reflecting plate that is provided with the in addition lamination polarization film of the light of secondary reflection again.Even one side that this lamination polarization film is bigger is also only about 150cm at present.
In Fig. 2, show the configuration example of lamination polarization film 18.Linearly polarized light film 20 and linearly polarized light diffusion barrier 22 are by bonding agent 24 bonding laminations.On the another side of online polarization film 20, be provided for peeling off rete 28 with what the lamination polarization film was bonded in bond layer 26 on the liquid crystal cells and this bond layer 26 of protection.In addition, upper strata, the opposite voltage protection film 30 of online polarized light separation membrane.Diaphragm 30 is in the end peeled off in the operation and is removed.
Lamination polarization film with described formation is through being made by the operation of bond layer line ball polarization film and linearly polarized light diffusion barrier.(for example open flat 11-271534 communique (paragraph [0005]～[0007]) and the spy opens 2000-275436 communique (paragraph [0034] with reference to the spy.)
But, in case place the lamination polarization film that obtains by above-mentioned operation, become concavity (hereinafter referred to as " oppositely curling ") as curling the making of linearly polarized light film side (A face side among Fig. 2) generation of bonding side on liquid crystal cells, should oppositely curl, find when one side of lamination polarization film more than the 8cm, particularly effect is remarkable when 20cm is above.This is big oppositely to curl, and when peeling off stripping film 28 and be bonded on the liquid crystal cells 10, just becomes and produces bad reason at easy residual bubble on the bonding plane and on liquid crystal panel.
Thus, people expect the lamination polarization film, do not produce oppositely curling of essence, also are curl (hereinafter referred to as " forward curl ") that linearly polarized light film side becomes convex even do not curl or curl.
Summary of the invention
The object of the present invention is to provide a kind of manufacture method that does not produce the lamination polarization film that oppositely curls of essence.
Inventor etc., in order to reach described purpose, carried out being used to do not produced the oppositely research with keen determination of curling lamination polarization film of essence, found that, after the moisture rate of linearly polarized light diffusion barrier is adjusted at certain limit, by with the linearly polarized light film lamination, thereby do not produced the lamination polarization film that oppositely curls and finished the present invention.
That is, the present invention is the manufacture method of the lamination polarization film of a kind of laminated yarn polarization film and linearly polarized light diffusion barrier, it is characterized in that, has the moisture rate adjustment operation that the moisture rate of linearly polarized light diffusion barrier is adjusted at 0.3～0.8 weight % before lamination.
The method according to this invention can obtain not having the lamination polarization film that oppositely curls of essence.
Oppositely curling of essence described here, be meant on liquid crystal cells, to make when bonding to produce oppositely curling of undesirable levels such as residual bubble, allowed some oppositely curling, its degree, in the lamination polarization film of 20 inches sizes, count about 1～2mm with following amount of curl.Oppositely amount of curl in case for about 3mm with about, will become the bad reason of generation, not preferred.
Description of drawings
Fig. 1 is the cut-open view that is illustrated in the structure of lamination polarization film on the liquid crystal cells.
Fig. 2 is the cut-open view of the formation of expression lamination polarization film.
Fig. 3 is the sketch that continuous atomized water spray carries out the device of humidification on the online polarized light separation membrane.
Among the figure: 10: liquid crystal cells, 12: bond layer, 14: the linearly polarized light film; 18: the lamination polarization film; 20: linearly polarized light film, 22: linearly polarized light diffusion barrier, 24: bond layer; 26: bond layer; 28: stripping film, 30: diaphragm, 32: film transmits roller; 34: winding film roller, 36: spraying plant.
Embodiment
In the present invention, after being adjusted at 0.3～0.8 weight %, preferred 0.4～0.6 weight % scope, the moisture rate with the linearly polarized light diffusion barrier carries out lamination with the linearly polarized light film.Usually, as long as the linearly polarized light diffusion barrier is carried out the moisture rate that humidification is adjusted at regulation by drying regime, for example can pass through the method for film immersion in water; Make method that water contacts with vaporific, mist, shower shape, make by the indoor of high humility state or with its indoor method that is kept at the high humility state etc. moisture rate is adjusted.
As the method for adjustment of moisture rate, preferably use portable cord polarized light separation membrane limit, limit on film, to make moisture with vaporific method of spraying.The film of coiling adhesive water leaves standstill.Film preferably moves continuously with certain speed.When changing amount of moisture, also can change the translational speed of film.
The linearly polarized light diffusion barrier is handled with the bonding state of diaphragm usually, and preferably spray on the film of protection moisture this moment.
Moisture rate is generally measured by the assay method that uses in the moisture rate of resin or inorganic particle is measured.Specifically the determination object thing is heated and removes moisture, by the heating before and the heating after weight difference draw moisture rate.
In foregoing invention, described linearly polarized light diffusion barrier is preferably mylar.
The linearly polarized light diffusion barrier, preferably with the film of polyester as major component, on its performance, especially preferably with Polyethylene Naphthalate or will be that the multipolymer of major component is the film of raw material with the Polyethylene Naphthalate unit, for example can example with the commercially available film of trade name " DBEF " (Sumitomo 3M company).The linearly polarized light diffusion barrier that constitutes by this kind polyester, after the manufacturing, for as direct former warp around supply, the moisture rate of original counter-film, actual measurement is 0.1～0.2 weight %, and is lower than the saturation moisture rate (about 0.8 weight %) of its film, with the high linearly polarized light film lamination of moisture rate after, because dividing a word with a hyphen at the end of a line of moisture considered more to be easy to generate oppositely and curled.
In addition, the linearly polarized light diffusion barrier, as above-mentioned, be to have to see through and see through the parallel light of direction of principal axis, and be reflected in the film of the function of the parallel light of the axis of reflection direction vertical with seeing through axle, reflective polarizing light film is called non-absorption-type polarization film, perhaps, improve film so be also referred to as brightness owing to utilizing the light after reflecting to improve brightness again.
On the other hand, relative therewith, the linearly polarized light film, be have see through see through light parallel on the direction of principal axis and be absorbed in see through a vertical absorption axes direction on the film of function of parallel light, be also referred to as the absorption-type polarization film.
The linearly polarized light film can use known linearly polarized light film.The linearly polarized light film; usually be that main material constitutes with tri acetyl cellulose (TAC); as preferred formation, can example go out the laminated film between TAC film and the polyvinyl alcohol film, the film that specifically has at least three layers of formation of TAC film/polyvinyl alcohol film/TAC film.Constituting the resin material of these linearly polarized light films, all is polarity height and the high material of saturation moisture rate.As the linearly polarized light film of the above-mentioned sandwich construction of general use, for suppressing curling of self, can with the ratio of moisture rate adjustment higher for example be about 2.5 weight %.Thus, for example can consider by and the lamination of the polyesters linearly polarized light diffusion barrier of drying regime, moisture is capable and produce and curl to linearly polarized light diffusion barrier sidesway by the linearly polarized light film.
Adjust operation by the moisture rate that the moisture rate of adjusting the linearly polarized light diffusion barrier is set, the lamination polarization film that obtains is not easy to produce the reason of oppositely curling and is not very clear, suppressing owing to moisture by the high linearly polarized light film of moisture rate to the divide a word with a hyphen at the end of a line change in size of each film of causing of the low linearly polarized light diffusion barrier of moisture rate but can infer, is one of them very big reason.
Usually, the diaphragm that lamination is made of Polyethylene Naphthalate etc. on the one side of online polarized light separation membrane.The linearly polarized light film is lamination on the opposite face at the face with this diaphragm of lamination.Diaphragm is peeled off after bonding on the liquid crystal cells and is removed.
Embodiment
Below embodiment of concrete expression formation of the present invention and effect etc. is described.
In addition, amount of curl, when placing on the flat board under with linearly polarized light film side direction, the average height from flat board that can be used as four summits of lamination polarization film is tried to achieve.Positive expression forward curls, and negative expression is oppositely curled.
Embodiment 1
Preparing 5 is linearly polarized light diffusion barrier " DBEF " (the Sumitomo 3M corporate system of the Polyethylene Naphthalate system of 132 μ m with thickness; the diaphragm of a lamination polyethylene terephthalate; moisture rate is about 0.2 weight %) be cut to the film of 308mm * 235mm, under the environment of 20 ℃ of relative humidity 80%, temperature, placed 24 hours respectively.Moisture rate after the placement is 0.62 weight % (moisture rate, peel off diaphragm then measure).With the sealing in the damp proof bag of packing into immediately of this linearly polarized light diffusion barrier, take out after two hours, laminated yarn polarization film on the face that does not have the lamination diaphragm, thus obtain the lamination polarization film.In lamination, use bonding drum.
The linearly polarized light film that uses, moisture rate is about 2.5 weight %, has the three-decker of TAC film/polyvinyl alcohol film/TAC film (80 μ m/25 μ m/80 μ m), and has the propylene class pressure sensitive bond layer of 25 μ m.
With the sealing in the damp proof bag of packing into of the lamination polarization film of gained, take out after at 20 ℃ and to measure amount of curl through the time shown in the tables 1.The measurement result of amount of curl is as shown in table 1.
Embodiment 2
Linearly polarized light diffusion barrier " DBEF " was placed 24 hours under the environment of 22 ℃ of relative humidity 64%, temperature.Moisture rate after the placement is 0.50 weight % (moisture rate, peel off diaphragm then measure).Except that using this straight line diffusion barrier, remaining is identical with embodiment 1, making lamination polarization film.
With the sealing in the damp proof bag of packing into of the lamination polarization film of gained, take out after at 20 ℃ and to measure amount of curl through the time shown in the tables 1.The measurement result of amount of curl is as shown in table 1.
Comparative example 1
Preparing 5 is the film that the linearly polarized light diffusion barrier " DBEF " (moisture rate is 0.17 weight %) of the Polyethylene Naphthalate system of 132 μ m is cut to 308mm * 235mm with thickness; under the environment of 22 ℃ of relative humidity 24%, temperature, placed 24 hours respectively; the result; moisture rate still is 0.17 weight % (moisture rate, peel off diaphragm then measure).
Except that use described moisture rate as the linearly polarized light diffusion barrier is the film of 0.17 weight %, and remaining and embodiment 1 are identical, makes the lamination polarization film.
With the sealing in the damp proof bag of packing into of the lamination polarization film of gained, take out after at 20 ℃ and to measure amount of curl through the time shown in the tables 1.The measurement result of amount of curl is as shown in table 1.
Table 1
| Embodiment 1 | Embodiment 2 | Comparative example 1 | ||
| Moisture rate (wt%) | 0.62 | 0.50 | 0.17 | |
| Elapsed time (hr) | 0 | 0.5 | 0.3 | 0.0 |
| 13 | 9.1 | 3.8 | -4.7 | |
| 23 | 9.6 | 4.5 | -5.0 | |
| 85 | 9.7 | 4.9 | -4.3 | |
| 253 | 8.9 | 4.0 | -3.6 | |
The result of table 1 shows, after the linearly polarized light diffusion barrier being added diseases caused by dampness carry out the moisture rate adjustment and the linearly polarized light film lamination after lamination polarization film of the present invention, all produce positive curling, for at the non-defective unit of not introducing bubble with liquid crystal cells when bonding, but, reverse the curling of lamination polarization film generation that moisture rate is adjusted the comparative example of operation is not set.
Embodiment 3
Utilize damping device shown in Figure 3 that the moisture of linearly polarized light diffusion barrier is adjusted.The linearly polarized light diffusion barrier being carried out moving continuously with certain speed limit with the state of diaphragm, the limit makes moisture spray and make on diaphragm to adhere to, directly be wound on other the core.Change the translational speed of film, thereby change the adhesion amount of moisture.The wound film roller was left standstill two, obtain adjusting the linearly polarized light diffusion barrier behind the moisture rate.Peel off the diaphragm of linearly polarized light diffusion barrier and measure moisture rate.
With the sealing in the damp proof bag of packing into immediately of the lamination polarization film behind the adjustment moisture rate of gained; take out after two hours and carry out 1 identical operations with embodiment on the face that does not have the lamination diaphragm, the laminated yarn polarization film obtains 20 inches sizes (lamination polarization film of 420mm * 318mm).
With the sealing in the damp proof bag of packing into of the lamination polarization film of gained, measure amount of curl through taking out after 65 hours at 20 ℃.The measurement result of amount of curl is as shown in table 2.
Table 2
| Moisture rate (wt%) | Crimp values (mm) (bonding back 65hrs) | Outward appearance | Could use | ||
| Embodiment 3 | 1 | 0.30 | -1.4 | Very | Can |
| 2 | 0.42 | +0.4 | Very | Can | |
| 3 | 0.61 | +5.8 | Very | Can | |
| 4 | 0.73 | +13.9 | Very | Can | |
Moisture rate is when 0.30 weight %, and amount of curl is-1.4mm, carry out some oppositely curl but in permissible range the lamination polarization film of gained no problem, also can use.
The method according to this invention can obtain by not producing when bonding on liquid crystal cells as at residual bubble on the bonding plane, the linearly polarized light film that oppositely curls of essence that produces bad reason on liquid crystal panel and the lamination polarization film that the linearly polarized light diffusion barrier constitutes.
Claims (3)
1. the manufacture method of a lamination polarization film, be with linearly polarized light film and linearly polarized light diffusion barrier lamination and obtain the method for lamination polarization film, the spy is characterised in that to have the moisture adjustment operation that the moisture rate of linearly polarized light diffusion barrier is adjusted at 0.3～0.8 weight % before online polarization film and the linearly polarized light diffusion barrier lamination.
2. the manufacture method of lamination polarization film according to claim 1 is characterized in that, described linearly polarized light diffusion barrier is a mylar, and described linearly polarized light film is the laminated film of polyvinyl alcohol film and tri acetyl cellulose film.
3. the manufacture method of lamination polarization film according to claim 1 is characterized in that, thereby the limit makes the linearly polarized light diffusion barrier move the limit moisture is adjusted on film to moisture rate with vaporific spraying.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002158852 | 2002-05-31 | ||
| JP2002158852 | 2002-05-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1461955A CN1461955A (en) | 2003-12-17 |
| CN1311257C true CN1311257C (en) | 2007-04-18 |
Family
ID=29773837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB03131015XA Expired - Lifetime CN1311257C (en) | 2002-05-31 | 2003-05-14 | Method for making laminated polarized optical film |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR100984660B1 (en) |
| CN (1) | CN1311257C (en) |
| TW (1) | TWI288066B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007256569A (en) * | 2006-03-23 | 2007-10-04 | Sumitomo Chemical Co Ltd | Polarizing plate and its manufacturing method |
| US10365420B2 (en) | 2013-08-01 | 2019-07-30 | Lg Chem, Ltd. | Method for manufacturing polarizing film using ultrasonic vibrator for atomizing coating solution |
| JP2016018183A (en) * | 2014-07-11 | 2016-02-01 | 住友化学株式会社 | Polarizing plate and liquid crystal display device |
| JP2019159198A (en) * | 2018-03-15 | 2019-09-19 | 住友化学株式会社 | Method of manufacturing optical laminate and method of manufacturing optical laminate with adhesive layers |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0518425A2 (en) * | 1991-06-11 | 1992-12-16 | Dsm N.V. | Polarizing film made of semicrystalline polyolefine |
| EP0669379A1 (en) * | 1994-02-25 | 1995-08-30 | MITSUI TOATSU CHEMICALS, Inc. | Quinophtalone compounds and polarizing films using same |
| JPH09325213A (en) * | 1996-06-03 | 1997-12-16 | Toppan Printing Co Ltd | Antireflection film-provided polarizing film |
| JP3001984B2 (en) * | 1995-12-01 | 2000-01-24 | ポラロイド コーポレイション | High efficiency K-sheet polarizer |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05261806A (en) * | 1992-03-18 | 1993-10-12 | Unitika Ltd | Manufacture of polyamide biaxially oriented film |
| JP2000258631A (en) * | 1999-03-10 | 2000-09-22 | Nitto Denko Corp | Wide visual field angle polarizing plate and liquid crystal display device |
| JP2000275436A (en) * | 1999-03-29 | 2000-10-06 | Nitto Denko Corp | Polarizing member and optical member |
-
2003
- 2003-05-06 TW TW092112358A patent/TWI288066B/en not_active IP Right Cessation
- 2003-05-14 CN CNB03131015XA patent/CN1311257C/en not_active Expired - Lifetime
- 2003-05-28 KR KR1020030034096A patent/KR100984660B1/en active IP Right Grant
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0518425A2 (en) * | 1991-06-11 | 1992-12-16 | Dsm N.V. | Polarizing film made of semicrystalline polyolefine |
| EP0669379A1 (en) * | 1994-02-25 | 1995-08-30 | MITSUI TOATSU CHEMICALS, Inc. | Quinophtalone compounds and polarizing films using same |
| JP3001984B2 (en) * | 1995-12-01 | 2000-01-24 | ポラロイド コーポレイション | High efficiency K-sheet polarizer |
| JPH09325213A (en) * | 1996-06-03 | 1997-12-16 | Toppan Printing Co Ltd | Antireflection film-provided polarizing film |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100984660B1 (en) | 2010-10-01 |
| KR20030093991A (en) | 2003-12-11 |
| CN1461955A (en) | 2003-12-17 |
| TW200307601A (en) | 2003-12-16 |
| TWI288066B (en) | 2007-10-11 |
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