Patent Application
20180267356
The present invention relates to a method and apparatus for manufacturing an optical display device by laminating an optical functional film to a panel component.
More particularly, the present invention relates to a method and apparatus for continuously manufacturing an optical display device in which at least one isolated laminating part is formed in a humidified environment in which relative humidity is 60 to 75% RH when room temperature is 22° C. The laminating part makes up a part of the apparatus for continuously manufacturing the optical display device by laminating an optical functional film to a panel component. A rectangularly formed optical functional film with a pressure-sensitive adhesive layer is fed to a predetermined laminating position of a laminating unit positioned in the laminating part. A rectangular panel component is conveyed to the predetermined laminating position so as to correspond to the optical functional film, and aligned and laminated with each other to manufacture the optical display device.
The characteristics thereof lie in continuously manufacturing the optical display device while eliminating electrical charge of the optical display device caused by generation of static electricity in the optical functional film and/or the panel component when the optical display device is continuously manufactured. That is to say, the present invention is a method and apparatus for eliminating static electricity of the optical display device in which electrostatic amount of the optical display device statically electrified in a process of continuous manufacturing is quickly lowered in the above described humidified environment formed in the laminating part.
It has been well-known that there is a risk that static electricity which an optical display device is charged may degrade and/or destruct built-in electronic components. For example, electronic components built in a liquid crystal panel comprises a field-effect transistor such as a TFT elements etc. In manufacturing a liquid crystal display device, generally, different processes as in the following are carried out to complete manufacturing in order to prevent the destruction of these electronic components caused by static electricity.
A liquid crystal panel generally has a structure with a liquid crystal layer sealed between a color filter (CF substrate) layer and a transparent electrode (TFT substrate) layer. A liquid crystal display device is completed by carrying out a process of laminating each of sheets of polarizing films on at least upper and lower surfaces of the liquid crystal panel such that a transparent axis of the polarizing film on one surface is in a crossed-Nicol arrangement with that of the other surface.
In a so-called RTP laminating method and apparatus which manufactures an optical display device by, peeling and feeding only a web of carrier film from a web of laminate comprising a rectangular optical functional film, feeding the optical functional film peeled from the web of carrier film via a releasing body positioned at a laminating unit to a predetermined laminating position of the laminating unit and aligning a rectangular panel component conveyed thereto to laminate with the optical functional film. For example, a means for preventing the optical functional film from being statically electrified due to peeling (hereinafter, referred as “peeling-charge”) the optical functional film from the web of carrier film is described in Japanese Laid-Open Patent Publication JP2012-224041A (Patent Document 1).
Specifically, Patent Document 1 discloses as that, in laminating the optical functional film to the panel component to manufacture the optical display device, amount of charges generated by frictional electrification which occurs in the web of carrier film is controlled to eventually reduce amount of peeling-charge of the optical functional film peeled from the web of carrier film by configuring the releasing body of the laminating unit with a material located at a more negative side (or positive side) than the web of carrier film in terms of a triboelectric series when the web of carrier film is charged negatively (or positively) so that static electricity in the optical functional film generated by peeling operation when the optical functional film is peeled from the web of carrier film does not electrically destruct electronic components built in the panel component.
A so-called sheet-type laminating method and apparatus is described in Japanese Laid-Open Patent Publication JP2004-144908A (Patent Document 2) in which a sheet of optical functional film, comprising a pressure-sensitive adhesive layer exposed after a separator, which protects the pressure-sensitive adhesive layer, is peeled from the sheet of optical functional film, is sequentially fed to a predetermined laminating position of a laminating unit that makes up a laminating part, and a rectangular panel component is conveyed so as to be aligned with the sheet of optical functional film, and sequentially laminated via the pressure-sensitive adhesive layer for continuously manufacturing an optical display device. However, it does not at all describe elimination of charges generated in the optical display device caused, for example, by peeling operation and/or friction, when the optical functional film comprising the pressure-sensitive adhesive layer exposed after the separator is peeled is laminated to the rectangular panel component for continuously manufacturing the optical display device.
However, various proposals have been made for measures to prevent charges from being generated in a rectangular panel so far. For example, Japanese Laid-Open Patent Publication JP2002-323686A (Patent Document 3) discloses as that, when a panel component is statically electrified, a plurality of base conductive plates are positioned from upstream to downstream of a conveying unit so as to eliminate static electricity which the panel component is charged while conveying the panel component, and thus to gradually eliminate static electricity from the panel component.
Such measures to prevent electrostatic destruction of electronic components built in a panel component is not limited to the RTP laminating method and/or apparatus. Various proposals have been made similarly also for the so-called sheet-type laminating method and apparatus disclosed in Patent Document 2, in which a plurality of optical functional films preliminarily formed in rectangle so as to be matched with a shape of respective panel components are provided, each of the panel components and each of the optical functional films are conveyed to the predetermined laminating position of the laminating unit, only the separator is peeled from the optical functional film, and the optical functional film is laminated to the panel component by the pressure-sensitive adhesive layer to manufacture the optical display device.
Patent Documents 4 to 6 disclose a laminated film which reduces effect of static electricity caused by charges generated by peeling operation and/or friction etc. Specifically, Patent Documents 4 to 6 disclose a conductive layer formed on a surface where a pressure-sensitive adhesive layer of the optically functional film is formed, or a pressure-sensitive adhesive layer formed of a conducive adhesive agent. All of them disclose an anti-charging layer, a conductive layer or a conductive pressure-sensitive adhesive layer formed on a web of carrier film/optically functional film, or on an optically functional film having a pressure-sensitive adhesive layer with a rectangularly formed separator.
However, since it is difficult to completely eliminate charges of a statically electrified optical functional film and/or panel component for use, it is unavoidable that an optical display device manufactured by using them is also statically electrified. Therefore, Japanese Laid-Open Patent Publication JP H3-208019A (Patent Document 7) describes what performs manufacturing of a liquid crystal display device in a steam atmosphere.
In addition, according to Japanese Patent 5197708B (Patent Document 8), there is described a continuous manufacturing method of a liquid crystal display element as that, first, providing a polarizing film having a pressure-sensitive adhesive layer in a dry environment, then, providing a liquid crystal panel in a first wet environment in which relative humidity is higher than that of in the dry environment, and finally, laminating the polarizing film to the liquid crystal panel by a pressure-sensitive adhesive layer in a second wet environment in which relative humidity is higher than that of in the dry environment
Further, Japanese Laid-Open Patent Publication JP2008-084789A (Patent Document 9) discloses an apparatus to eliminate static electricity by neutralizing charges in a charged body, specifically, an apparatus for eliminating static electricity comprising a nozzle to atomize water to spray toward the charged body.
Patent Document 1: Japanese Laid-Open Patent Publication JP2012-224041A
Patent Document 2: Japanese Laid-Open Patent Publication JP2004-144908A
Patent Document 3: Japanese Laid-Open Patent Publication JP2002-323686A
Patent Document 4: Japanese Patent 4355215B
Patent Document 5: Japanese Laid-Open Patent Publication JP2001-318230A
Patent Document 6: Japanese Laid-Open Patent Publication JP2002-022960A
Patent Document 7: Japanese Laid-Open Patent Publication JP H3-208019A
Patent Document 8: Japanese Patent 5197708B
Patent Document 9: Japanese Laid-Open Patent Publication JP2008-084789A
The present invention challenges technical problems of, eliminating charges of a statically electrified optical display device quickly in a humidified environment and/or preventing generation of wetting caused by minute water droplets on such occasion, or eliminating charges of the statically electrified optical display device while controlling the generation of wetting, when the optical display device continuously manufactured by sheet type lamination or RTP lamination is statically electrified in a continuous manufacturing process.
The technical problems of the present invention may be solved as follows. A laminating part that makes up a part of an apparatus for continuously manufacturing an optical display device by laminating an optical functional film to a panel component. The laminating part forms an isolated space comprising air filtration means having an intake mechanism which takes in outside air inside and a filtration membrane, and an exhausting means which is installed in relation with the air filtration means to exhaust inside air outside. Humidity inside of the laminating part is set forth so as to make relative humidity as 60 to 75% RH at room temperature 22° C. The optical functional film is continuously laminated to one of opposite surfaces of the panel component sequentially conveyed to the laminating part humidified as such, or the optical functional film sequentially conveyed to the laminating part is continuously laminated one of opposite surfaces of the panel component sequentially conveyed to the laminating part.
The first aspect of the present invention is a method for continuously manufacturing an optical display device 6 as follows. A laminating part 100 makes up a part of an apparatus 10′ for continuously manufacturing the optical display device by laminating an optical functional film 1′ to a panel component 5, and forms an isolated space comprising an air filtration means 120 having an intake mechanism 121 which takes in outside air inside and a first filtration membrane 122, and an exhausting means 130 which is installed in relation with the air filtration means 120 to exhaust inside air outside. The method at least comprises the following steps. A humidifying step A is a step of humidifying the laminating part 100 so as to make relative humidity of the laminating part as 60 to 75% RH at room temperature 22° C. by a spraying means 110 equipped in the laminating part 100. The spraying means 110 comprises a spraying mechanism 113 inside the laminating part 100. A supplying step B′ is a step of sequentially supplying B′ a rectangularly formed optical functional film 1′ having a pressure-sensitive adhesive layer 4 with a separator 2′ laminated on one of opposite surfaces of the optical functional film to a predetermined laminating position 50 of the laminating part 100. A conveying step C′ is a step of conveying C′ a rectangular panel component 5 to the predetermined laminating position 50 so as to correspond to the sequentially supplied optical functional film 1′. A peeling step D′ is a step of peeling the separator 2′ from the optical functional film 1′ leaving the pressure-sensitive adhesive layer 4 behind. And a laminating step E is a step of laminating E the optical functional film 1′ to one of opposite surfaces of the panel component 5 by the pressure-sensitive adhesive layer 4.
The second aspect of the present invention is a method for continuously manufacturing an optical display device 6 as follows. A laminating part 100 makes up a part of an apparatus 10′ for continuously manufacturing the optical display device by laminating an optical functional film 1′ to a panel component 5, and forms an isolated space comprising an air filtration means 120 having an intake mechanism 121 which takes in outside air inside and a first filtration membrane 122, and an exhausting means 130 which is installed in relation with the air filtration means 120 to exhaust inside air outside. The method at least comprises the following steps. A humidifying step A is a step of humidifying the laminating part 100 so as to make relative humidity of the laminating part as 60 to 75% RH at room temperature 22° C. by a spraying means 110 equipped in the laminating part 100. The spraying means 110 comprises a spraying mechanism 113 inside the laminating part 100. A peeling step B is a step of sequentially peeling the optical functional film 1 having the pressure-sensitive adhesive layer 4 from the web of carrier film 2 via a peeling mechanism 60 positioned in proximity to a predetermined laminating position 50 of the laminating part 100, by feeding a web of laminate 11 that comprises at least a web of carrier film 2 and a plurality of optical functional films 1 with pressure-sensitive adhesive layers 4 rectangularly formed by forming slit lines 010 in a width direction on one of opposite surfaces of the web of carrier film 2. A supplying step C is a step of sequentially supplying the sequentially peeled optical functional film 1 with the pressure-sensitive adhesive layer 4 to the predetermined laminating position 50. A supplying step D is a step of conveying a rectangular panel component 5 to the predetermined laminating position 50 so as to correspond to the sequentially supplied optical functional film 1 with the pressure-sensitive adhesive layer 4. And a laminating step E is a step of laminating the optical functional film 1 to one of opposite surfaces of the panel component 5 by the pressure-sensitive adhesive layer 4.
In the first or second aspect of the invention, the humidifying step A may further comprise a step of spraying minute water droplets to the laminating part 100 at 0.02 to 0.05 L/min, in which a maximum particle size is 50 μm or less and an average particle size is 10 μm or less.
The third aspect of the present invention is a method for continuously manufacturing an optical display device 6 as follows. A laminating part 100 makes up a part of an apparatus 10 for continuously manufacturing the optical display device 6 by laminating an optical functional film 1′ to a panel component 5, and forms an isolated space comprising an air filtration means 120 having an intake mechanism 121 which takes in outside air inside and a first filtration membrane 122, and an exhausting means 130 which is installed in relation with the air filtration means 120 to exhaust inside air outside. The method at least comprises the following steps. A humidifying step A is a step of humidifying the laminating part 100 so as to make relative humidity of the laminating part 100 as 60 to 75% RH at room temperature 22° C. by a first vaporizing and humidifying means 140 equipped in the laminating part 100. The first vaporizing and humidifying means 140 comprises a spraying mechanism 113 inside the laminating part 100 combined with a blowing mechanism 114 and a second filtration membrane 115. A supplying step B′ is a step of sequentially supplying a rectangularly formed optical functional film 1′ having a pressure-sensitive adhesive layer with a separator 2′ laminated on one of opposite surfaces of the optical functional film to a predetermined laminating position 50 of the laminating part 100. A conveying step C′ is a step of conveying a rectangular panel component 5 to the predetermined laminating position 50 so as to correspond to the sequentially supplied optical functional film 1′. A peeling step D′ is a step of peeling the separator 2′ from the optical functional film 1′ leaving the pressure-sensitive adhesive layer 4 behind. And a laminating step E is a step of laminating the optical functional film 1′ to one of opposite surfaces of the panel component 5′ by the pressure-sensitive adhesive layer 4.
The fourth aspect of the present invention is a method for continuously manufacturing an optical display device 6 as follows. A laminating part 100 makes up a part of an apparatus 10 for continuously manufacturing the optical display device 6 by laminating an optical functional film 1′ to a panel component 5, and forms an isolated space comprising an air filtration means 120 having an intake mechanism 121 which takes in outside air inside and a first filtration membrane 122, and an exhausting means 130 which is installed in relation with the air filtration means 120 to exhaust inside air outside. The method at least comprises the following steps. A humidifying step A is a step of humidifying the laminating part 100 so as to make relative humidity of the laminating part 100 as 60 to 75% RH at room temperature 22° C. by a first vaporizing and humidifying means 140 equipped in the laminating part 100. The first vaporizing and humidifying means 140 comprises a spraying mechanism 113 inside the laminating part 100 combined with a blowing mechanism 114 and a second filtration membrane 115. A peeling step B is a step of sequentially peeling the optical functional film 1 having pressure-sensitive adhesive layers 4 from the web of carrier film 2 via a peeling mechanism 60 positioned in proximity to the predetermined laminating position 50 of the laminating part 100, by feeding a web of laminate that comprises at least a web of carrier film 11 and a plurality of optical functional films 1 with pressure-sensitive adhesive layers 4 rectangularly formed by forming slit lines 010 in a width direction on one of opposite surfaces of the web of carrier film 2. A supplying step C is a step of sequentially supplying the sequentially peeled optical functional film 1 having the pressure-sensitive adhesive layer 4 to the predetermined laminating position 50. A conveying step D is a step of conveying a rectangular panel component 5 to the predetermined laminating position 50 so as to correspond to the sequentially supplied optical functional film 1 having x the pressure-sensitive adhesive layer 4. And a laminating step E is a step of laminating the optical functional film 1 to one of opposite surfaces of the panel component by the pressure-sensitive adhesive layer 4.
In the third or fourth aspect of the invention, the humidifying step A further comprises a spraying step F of spraying minute water droplets to the laminating part 100 at 0.02 to 0.05 L/min, in which a maximum particle size is 50 μm or less and an average particle size is 10 μm or less. In the step F, the first vaporizing and humidifying means 140 sprays the minute water droplets 20 to the laminating part 100 by the spraying mechanism 113 by controlling the supply of water, filters the minute water droplets 20 that are blown to the laminating part 100 by the blowing mechanism 114 via the second filtration membrane 115, and vaporizes the minute water droplets 20 that are filtered and adhered to the second filtration membrane 115 by the blowing mechanism 114 so that the laminating part 100 may have relative humidity of 60 to 75% RH at room temperature 22° C.
The fifth aspect of the present invention is a method for continuously manufacturing an optical display device 6 as follows. A laminating part 100 makes up a part of an apparatus 10′ for continuously manufacturing the optical display device 6 by laminating an optical functional film 1′ to a panel component 5, and forms an isolated space that comprises an air filtration means 120 having an intake mechanism 121 which takes in outside air inside and a first filtration membrane 122, and an exhausting means 130 which is installed in relation with the air filtration means 120 to exhaust inside air outside. The method at least comprises the following steps. A humidifying step A is a step of humidifying the laminating part 100 so as to make relative humidity of the laminating part 100 as 60 to 75% RH at room temperature 22° C. by a second vaporizing and humidifying means 150 equipped in the laminating part 100, wherein the second vaporizing and humidifying means 150 comprises a spraying mechanism 113 inside the laminating part 100, combined with a suctioning mechanism 116 and a second filtration membrane 115. A supplying step B′ is a step of sequentially supplying a rectangularly formed optical functional film 1′ having a pressure-sensitive adhesive layer 4 with a separator 2′ laminated on one of opposite surfaces of the optical functional film to a predetermined laminating position 50 of the laminating part 100. A conveying step C′ is a step of conveying a rectangular panel component 5 to the predetermined laminating position 50 so as to correspond to the sequentially supplied optical functional film 1′. A peeling step D′ is a step of peeling the separator 2′ from the optical functional film 1′ leaving the pressure-sensitive adhesive layer 4 behind, and a laminating step E is a step of laminating the optical functional film 1′ to one of opposite surfaces of the panel component 5 by the pressure-sensitive adhesive layer 4.
The sixth aspect of the present invention is a method for continuously manufacturing an optical display device 6 as follows. A laminating part 100 makes up a part of an apparatus 10 for continuously manufacturing the optical display device 6 by laminating an optical functional film 1 to a panel component 5, and forms an isolated space comprising an air filtration means 120 having an intake mechanism 121 which takes in outside air inside and a first filtration membrane 122, and an exhausting means 130 which is installed in relation with the air filtration means 120 to exhaust inside air outside, the method at least comprises the following steps. A humidifying step A is a step of humidifying the laminating part 100 so as to make relative humidity of the laminating part 100 as 60 to 75% RH at room temperature 22° C. by a second vaporizing and humidifying means 150 equipped in the laminating part 100, wherein the second vaporizing and humidifying means 150 comprises a spraying mechanism 113 inside the laminating part 100, combined with a suctioning mechanism 116 and a second filtration membrane 115. A peeling step B is a step of sequentially peeling the optical functional film 1 having the pressure-sensitive adhesive layer 4 from the web of carrier film 2 via a peeling mechanism 60 positioned in proximity to the predetermined laminating position 50 of the laminating part 100, by feeding a web of laminate 11 that comprises at least a web of carrier film 2 and a plurality of optical functional films 1 with pressure-sensitive adhesive layers 4 rectangularly formed by forming slit lines 010 in a width direction on one of opposite surfaces of the web of carrier film 2. A supplying step C is a step of sequentially supplying the sequentially peeled optical functional film 1 with the pressure-sensitive adhesive layer 4 to the predetermined laminating position 50. A conveying step D is a step of conveying a rectangular panel component 5 to the predetermined laminating position 50 so as to correspond to the sequentially supplied optical functional film 1 with the pressure-sensitive adhesive layer 4. And a laminating step E is a step of laminating the optical functional film 1 to one of opposite surfaces of the panel component 5 by the pressure-sensitive adhesive layer 4.
In the fifth or sixth aspect of the invention, the humidifying step A further comprises a spraying step F of spraying minute water droplets to the laminating part 100 at 0.02 to 0.05 L/min, in which a maximum particle size is 50 μm or less and an average particle size is 10 μm or less. In the step F, the second vaporizing and humidifying means 150 sprays the minute water droplets 20 to the laminating part 100 by the spraying mechanism 113 by controlling the supply of water, filters the minute water droplets 20 that are taken in to the laminating part 100 by the suctioning mechanism 116 via the second filtration membrane 115, and vaporizes the minute water droplets 20 that are filtered and adhered to the second filtration membrane 115 by the suctioning mechanism 116 so that the laminating part 100 may have relative humidity of 60 to 75% RH at room temperature 22° C.
The seventh aspect of the present invention is a method for continuously manufacturing an optical display device 6 as follows. A laminating part 100 makes up a part of an apparatus 10′ for continuously manufacturing the optical display device 6 by laminating an optical functional film 1′ to a panel component 5, and forms an isolated space comprising an air filtration means 120 having an intake mechanism 121 which takes in outside air inside and a first filtration membrane 122, and an exhausting means 130 which is installed in relation with the air filtration means 120 to exhaust inside air outside. The method at least comprises the following steps. A humidifying step A is a step of humidifying the laminating part 100 so as to make relative humidity of the laminating part 100 as 60 to 75% RH at room temperature 22° C. by a third vaporizing and humidifying means 170 equipped outside the laminating part 100.The third vaporizing and humidifying means 170 comprises a spraying mechanism 113 outside the laminating part 100, activated in relation with the air filtration means 120. A supplying step B′ is a step of sequentially supplying a rectangularly formed optical functional film 1′ having a pressure-sensitive adhesive layer 4 with a separator 2′ laminated on one of opposite surfaces of the optical functional film to a predetermined laminating position 50 of the laminating part 100. A conveying step C′ of conveying a rectangular panel component 5 to the predetermined laminating position 50 so as to correspond to the sequentially supplied optical functional film 1′. A peeling step D′ is a step of peeling the separator 2′ from the optical functional film 1′ leaving the pressure-sensitive adhesive layer 4 behind. And a laminating step E is a step of laminating the optical functional film 1′ to one of opposite surfaces of the panel component 5 by the pressure-sensitive adhesive layer 4.
The eighth aspect of the present invention is a method for continuously manufacturing an optical display device 6 as follows. A laminating part 100 that makes up a part of an apparatus 10 for continuously manufacturing the optical display device 6 by laminating an optical functional film 1 to a panel component 5, and which forms an isolated space comprising an air filtration means 120 having an intake mechanism 121 which takes in outside air inside and a first filtration membrane 122, and an exhausting means 130 which is installed in relation with the air filtration means 120 to exhaust inside air outside. The method at least comprises the following steps. A humidifying step A is a step of humidifying the laminating part 100 so as to make relative humidity of the laminating part 100 as 60 to 75% RH at room temperature 22° C. by a third vaporizing and humidifying means 170 equipped outside the laminating part 100. The third vaporizing and humidifying means 170 comprises a spraying mechanism 113 outside the laminating part 100, activated in relation with the air filtration means 120. A peeling step B is a step of sequentially peeling the optical functional film 1 having the pressure-sensitive adhesive layer 4 from the web of carrier film 2 via a peeling mechanism 60 positioned in proximity to the predetermined laminating position 50 of the laminating part 100, by feeding a web of laminate 11 that comprises at least a web of carrier film 2 and a plurality of optical functional films 1 with pressure-sensitive adhesive layers 4 rectangularly formed by forming slit lines 010 in a width direction on one of opposite surfaces of the web of carrier film 2. A supplying step C of sequentially supplying the sequentially peeled optical functional film 1 with the pressure-sensitive adhesive layer 4 to the predetermined laminating position. A conveying step D is a step of conveying a rectangular panel component 5 to the predetermined laminating position 50 so as to correspond to the sequentially supplied optical functional film 1 with the pressure-sensitive adhesive layer 4. And a laminating step E is a step of laminating the optical functional film 1 to one of opposite surfaces of the panel component 5 by the pressure-sensitive adhesive layer 4.
In the seventh or eighth aspect of the invention, the humidifying step A further comprises a spraying step F of spraying minute water droplets to the laminating part 100 at 0.02 to 0.05 L/min, in which a maximum particle size is 50 μm or less and an average particle size is 10 μm or less. In the step F, the third vaporizing and humidifying means 170 sprays the minute water droplets 20 to the laminating part 100 by the spraying mechanism 113 by controlling the supply of water, filters the minute water droplets 20 that are taken in to the laminating part 100 by the intake mechanism 121 of the air filtration means 120 via the first filtration membrane 122 of the air filtration means 120, and vaporizes the minute water droplets 20 that are filtered and adhered to the first filtration membrane 122 by the intake mechanism 121 so that the laminating part 100 may have relative humidity of 60 to 75% RH at room temperature 22° C.
In the seventh or eighth aspect of the invention, it is preferable that intake amount by the intake mechanism 121 of the air filtration means 120 is set to 11 m3/min when the first filtration membrane 122 having mesh roughness of 0.3 μm/99.99% is used for the air filtration means 120. It is preferable that intake amount by the intake mechanism 121 of the air filtration means 120 is set to 36 m3/min when the first filtration membrane 122 having mesh roughness of 3 μm/88% is used for the air filtration means 120.
In any of the first to the eighth aspects of the invention, the panel component 5 comprises a rectangular liquid crystal panel with electric components built therein, the optical functional film 1 or the optical functional film 1′ comprises a polarizing film having a pressure-sensitive adhesive layer which is rectangularly formed so as to match with long sides or short sides of the rectangular liquid crystal panel. Each of the polarizing films are laminated to both surfaces of the liquid crystal panel in a crossed-Nicol arrangement to thereby continuously manufacture an optical display device 6.
The ninth aspect of the present invention is an apparatus 10′ for continuously manufacturing an optical display device 6 as follows. A laminating part 100 makes up a part of an apparatus 10′ for continuously manufacturing the optical display device 6 by laminating an optical functional film 1′ to a panel component 5, and forms an isolated space comprising an air filtration means 120 having an intake mechanism 121 which takes in outside air inside and a first filtration membrane 122, and an exhausting means 130 which is installed in relation with the air filtration means 120 to exhaust inside air outside. The apparatus 10′ at least comprises as follows. A spraying means 110 is equipped in the laminating part 100, and comprises a spraying mechanism 113 inside the laminating part 100 for humidifying the laminating part 100 so as to make relative humidity of the laminating part 100 as 60 to 75% RH at room temperature 22° C. A supplying means 200′ sequentially supplies a rectangularly formed optical functional film 1′ having a pressure-sensitive adhesive layer 4 with a separator 2′ laminated on one of opposite surfaces of the optical functional film to a predetermined laminating position 50 of the laminating part 100. A conveying means 300′ conveys a rectangular panel component 5 to the predetermined laminating position 50 so as to correspond to the sequentially supplied optical functional film 1′. A peeling means 600′ peels the separator 2′ from the optical functional film 1′ leaving the pressure-sensitive adhesive layer 4 behind. A laminating means 400 laminates the optical functional film 1′ to one of opposite surfaces of the panel component 5 by the pressure-sensitive adhesive layer 4.
The tenth aspect of the present invention is an apparatus 10 for continuously manufacturing an optical display device 6 as follows. A laminating part 100 makes up a part of an apparatus 10 for continuously manufacturing the optical display device 6 by laminating an optical functional film 1 to a panel component 5, and forms an isolated space comprising an air filtration means 120 having an intake mechanism 121 which takes in outside air inside and a first filtration membrane 122, and an exhausting means 130 which is installed in relation with the air filtration means 120 to exhaust inside air outside. The apparatus 10 at least comprises as follows. A spraying means 110 is equipped in the laminating part 100, and comprises a spraying mechanism 113 inside the laminating part 100 for humidifying the laminating part 100 so as to make relative humidity of the laminating part 100 as 60 to 75% RH at room temperature 22° C. A peeling means 600 sequentially peels the optical functional film 1 having the pressure-sensitive adhesive layer 4 from the web of carrier film 2 via a peeling mechanism 60 positioned in proximity to the predetermined laminating position 50 of the laminating part 100, by feeding a web of laminate 11 at least comprising a web of carrier film 2 and a plurality of optical functional film 1 with pressure-sensitive adhesive layers 4 rectangularly formed by forming slit lines 010 in a width direction on one of opposite surfaces of the web of carrier film 2. A supplying means 200 sequentially supplies the sequentially peeled optical functional film having the pressure-sensitive adhesive layer to the predetermined laminating position. A conveying means 300 conveys a rectangular panel component 5 to the predetermined laminating position 50 so as to correspond to the sequentially supplied optical functional film 1 having the pressure-sensitive adhesive layer 4. A laminating means 400 laminates the optical functional film 1 to one of opposite surfaces of the panel component 5 by the pressure-sensitive adhesive layer 4.
In the ninth or tenth aspect of the invention, the spraying mechanism 113 sprays minute water droplets to the laminating part 100 at 20 by 0.02 to 0.05 L/min, in which a maximum particle size is 50 μm or less and an average particle size is 10 μm or less.
The eleventh aspect of the present invention is an apparatus 10′ for continuously manufacturing an optical display device 6 as follows. A laminating part 100 makes up a part of an apparatus for continuously manufacturing the optical display device 6 by laminating an optical functional film 1′ to a panel component 5, and forms an isolated space comprising an air filtration means 120 having an intake mechanism 121 which takes in outside air inside and a first filtration membrane 122, and an exhausting means 130 which is installed in relation with the air filtration means 120 to exhaust inside air outside. The apparatus 10′ at least comprises as follows. A first vaporizing and humidifying means 140 is equipped in the laminating part 100, and comprises a spraying mechanism 113 inside the laminating part 100, combined with a blowing mechanism 114 and a second filtration membrane 115 for humidifying the laminating part 100 so as to make relative humidity of the laminating part 100 as 60 to 75% RH at room temperature 22° C.
A supplying means 200′ sequentially supplies a rectangularly formed optical functional film 1′ having a pressure-sensitive adhesive layer 4 with a separator 2′ laminated on one of opposite surfaces of the optical functional film to a predetermined laminating position 50 of the laminating part 100. A conveying means 300′ conveys a rectangular panel component 5 to the predetermined laminating position 50 so as to correspond to the sequentially supplied optical functional film 1′. A peeling means 600′ peels the separator 2′ from the optical functional film 1′ leaving the pressure-sensitive adhesive layer 4 behind. A laminating means 400 laminates the optical functional film 1′ to one of opposite surfaces of the panel component 5 by the pressure-sensitive adhesive layer 4.
The twelfth aspect of the present invention is an apparatus 10 for continuously manufacturing an optical display device 6 as follows. A laminating part 100 makes up a part of an apparatus 10 for continuously manufacturing the optical display device 6 by laminating an optical functional film 1 to a panel component, and forms an isolated space comprising an air filtration means 120 having an intake mechanism 121 which takes in outside air inside and a first filtration membrane 122, and an exhausting means 130 which is installed in relation with the air filtration means 120 to exhaust inside air outside. The apparatus 10 at least comprises as follows. A first vaporizing and humidifying means 140 is equipped in the laminating part 100, and comprises a spraying mechanism 113 inside the laminating part 100, combined with a blowing mechanism 144 and a second filtration membrane 115 for humidifying the laminating part 100 so as to make relative humidity of the laminating part 100 as 60 to 75% RH at room temperature 22° C. A peeling means 600 sequentially peels the optical functional film 1 having the pressure-sensitive adhesive layer 4 from the web of carrier film 2 via a peeling mechanism 60 positioned in proximity to the predetermined laminating position 50 of the laminating part 100, by feeding a web of laminate 11 at least comprising a web of carrier film 2 and a plurality of optical functional film 1 with pressure-sensitive adhesive layers 4 rectangularly formed by forming slit lines 010 in a width direction on one of opposite surfaces of the web of carrier film 2. A supplying means 200 sequentially supplies the sequentially peeled optical functional film 1 with the pressure-sensitive adhesive layer 4 to the predetermined laminating position 50. A conveying means 300 conveys a rectangular panel component 5 to the predetermined laminating position so as to correspond to the sequentially supplied optical functional film 1 with the pressure-sensitive adhesive layer 4. A laminating means 400 laminates the optical functional film 1 to one of opposite surfaces of the panel component 5 by the pressure-sensitive adhesive layer 4.
In the eleventh or twelfth aspect of the invention, the spraying mechanism 113 sprays minute water droplets to the laminating part 100 at 20 by 0.02 to 0.05 L/min, in which a maximum particle size is 50 μm or less and an average particle size is 10 μm or less. The first vaporizing and humidifying means 140 comprises the spraying mechanism 113 that sprays the minute water droplets 20 to the laminating part 100 by the spraying mechanism 113 by controlling the supply of water, and filters the minute water droplets 20 blown to the laminating part 100 by the blowing mechanism 114 via the second filtration membrane 115, and vaporizes the minute water droplets 20 that are filtered and adhered to the second filtration membrane 115 by the blowing mechanism 114 so that the laminating part may have relative humidity of 60 to 75% RH at room temperature 22° C.
The thirteenth aspect of the present invention is an apparatus 10′ for continuously manufacturing an optical display device 6 as follows. A laminating part 100 makes up a part of an apparatus 10′ for continuously manufacturing the optical display device 6 by laminating an optical functional film 1′ to a panel component 5, and forms an isolated space comprising an air filtration means 120 having an intake mechanism 121 which takes in outside air inside and a first filtration membrane 122, and an exhausting means 130 which is installed in relation with the air filtration means 120 to exhaust inside air outside. The apparatus 10′ at least comprises as follows. A second vaporizing and humidifying means 150 is equipped in the laminating part 100, and comprising a spraying mechanism 113 inside the laminating part 100, combined with a suctioning mechanism 116 and a second filtration membrane 115 for humidifying the laminating part 100 so as to make relative humidity of the laminating part as 60 to 75% RH at room temperature 22° C. A supplying means 200′ sequentially supplies a rectangularly formed optical functional film 1′ having a pressure-sensitive adhesive layer 4 with a separator 2′ laminated on one of opposite surfaces of the optical functional film to a predetermined laminating position 50 of the laminating part 100. A conveying means 300′ conveys a rectangular panel component 5 to the predetermined laminating position 50 so as to correspond to the sequentially supplied optical functional film 1. A peeling means 600′ peels the separator 2′ from the optical functional film 1′ leaving the pressure-sensitive adhesive layer 4 behind. And a laminating means 400 laminates the optical functional film 1′ to one of opposite surfaces of the panel component 5 by the pressure-sensitive adhesive layer 4.
The fourteenth aspect of the present invention is an apparatus 10 for continuously manufacturing an optical display device 6 as follows. A laminating part 100 makes up a part of an apparatus 10 for continuously manufacturing the optical display device 6 by laminating an optical functional film 1 to a panel component 5, and forms an isolated space comprising an air filtration means 120 having an intake mechanism 121 which takes in outside air inside and a first filtration membrane 122, and an exhausting means 130 which is installed in relation with the air filtration means 120 to exhaust inside air outside. The apparatus 10 at least comprises as follows. A second vaporizing and humidifying means 150 equipped in the laminating part 100, and comprising a spraying mechanism 113 inside the laminating part 100, combined with a suctioning mechanism 116 and a second filtration membrane 115 for humidifying the laminating part 100 so as to make relative humidity of the laminating part 100 as 60 to 75% RH at room temperature 22° C. A peeling means 600 sequentially peels the optical functional film 1 having the pressure-sensitive adhesive layer 4 from the web of carrier film 2 via a peeling mechanism 60 positioned in proximity to the predetermined laminating position 50 of the laminating part 100, by feeding a web of laminate 11 at least comprising a web of carrier film 2 and a plurality of optical functional film 1 having pressure-sensitive adhesive layers 4 that are rectangularly formed by forming slit lines 010 in a width direction on one of opposite surfaces of the web of carrier film 2. A supplying means 200 sequentially supplies the sequentially peeled optical functional film 1 having the pressure-sensitive adhesive layer 4 to the predetermined laminating position 50. A conveying means 300 conveys a rectangular panel component 5 to the predetermined laminating position 50 so as to correspond to the sequentially supplied optical functional film 1 having the pressure-sensitive adhesive layer 4. And a laminating means 400 laminates the optical functional film 1 to one of opposite surfaces of the panel component 5 by the pressure-sensitive adhesive layer 4.
In the thirteenth or fourteenth aspect of the invention, the spraying mechanism 113 sprays minute water droplets 20 to the laminating part 100 at 0.02 to 0.05 L/min, which a maximum particle size is 50 μm or less and an average particle size is 10 μm or less. The second vaporizing and humidifying means 150 comprises the spraying mechanism 113 that sprays the minute water droplets 20 to the laminating part 100 by the spraying mechanism 113 by controlling the supply of water, and filters the minute water droplets 20 that are taken in to the laminating part 100 by the suctioning mechanism 116 via the second filtration membrane 115, and vaporizes the minute water droplets 20 that are filtered and adhered to the second filtration membrane 115 by the suctioning mechanism 116 so that the laminating part may have relative humidity of 60 to 75% RH at room temperature 22° C.
The fifteenth aspect of the present invention is an apparatus 10′ for continuously manufacturing an optical display device 6 as follows. A laminating part 100 makes up a part of an apparatus 10′ for continuously manufacturing the optical display device 6 by laminating an optical functional film 1′ to a panel component 5, and forms an isolated space comprising an air filtration means 120 having an intake mechanism 121 which takes in outside air inside and a first filtration membrane 122, and an exhausting means 130 which is installed in relation with the air filtration means 120 to exhaust inside air outside, the apparatus 10′ at least comprising a third vaporizing and humidifying means 170 equipped outside the laminating part 100, and comprising a spraying mechanism 113 outside the laminating part 100, activated in relation with the air filtration means 120 for humidifying the laminating part 100 so as to make relative humidity of the laminating part 100 as 60 to 75% RH at room temperature 22° C. A supplying means 200′ sequentially supplies a rectangularly formed optical functional film 1′ having a pressure-sensitive adhesive layer 4 with a separator 2′ laminated on one of opposite surfaces of the optical functional film to a predetermined laminating position 50 of the laminating part 100. A conveying means 300′ conveys a rectangular panel component 5 to the predetermined laminating position 50 so as to correspond to the sequentially supplied optical functional film 1′. A peeling means 600′ peels the separator 2′ from the optical functional film 1′ leaving the pressure-sensitive adhesive layer 4 behind. And a laminating means 400 laminates the optical functional film 1′ to one of opposite surfaces of the panel component 5 by the pressure-sensitive adhesive layer 4.
The sixteenth aspect of the present invention is an apparatus 10 for continuously manufacturing an optical display device 6 as follows. A laminating part 100 makes up a part of an apparatus 10 for continuously manufacturing the optical display device 6 by laminating an optical functional film 1 to a panel component 5, and forms an isolated space comprising an air filtration means 120 having an intake mechanism 121 which takes in outside air inside and a first filtration membrane 122, and an exhausting means 130 which is installed in relation with the air filtration means to exhaust inside air outside. The apparatus 10 at least comprises as follows. A third vaporizing and humidifying means 170 is equipped outside the laminating part 100, and comprises a spraying mechanism 113 outside the laminating part 100, activated in relation with the air filtration means 120 for humidifying the laminating part 100 so as to make relative humidity of the laminating part 100 as 60 to 75% RH at room temperature 22° C. A peeling means 600 sequentially peels the optical functional film 1 having the pressure-sensitive adhesive layer 4 from the web of carrier film 2 via a peeling mechanism 60 positioned in proximity to the predetermined laminating position 50 of the laminating part 100, by feeding a web of laminate 11 at least comprising a web of carrier film 2 and a plurality of optical functional film 1 with pressure-sensitive adhesive layers 4 rectangularly formed by forming slit lines 010 in a width direction on one of opposite surfaces of the web of carrier film 2. A supplying means 200 sequentially supplies the sequentially peeled optical functional film 1 having the pressure-sensitive adhesive layer 4 to the predetermined laminating position 50. A conveying means 300 conveys a rectangular panel component 5 to the predetermined laminating position 50 so as to correspond to the sequentially supplied optical functional film 1 with the pressure-sensitive adhesive layer 4. And a laminating means 400 to laminate the optical functional film 1 to one of opposite surfaces of the panel component 5 by the pressure-sensitive adhesive layer 4.
In the fifteenth or sixteenth aspect of the invention, the spraying mechanism 113 sprays minute water droplets 20 to the laminating part 100 at 0.02 to 0.05 L/min, which a maximum particle size is 50 μm or less and an average particle size is 10 μm or less. The third vaporizing and humidifying means 170 comprises the spraying mechanism 113 sprays the minute water droplets 20 to the laminating part 100 by the spraying mechanism 113 by controlling the supply of water and filters the minute water droplets 20 taken in to the laminating part 100 by the intake mechanism 121 of the air filtration means 120 via the first filtration membrane 122 of the air filtration means 120, and vaporizes the minute water droplets 20 that are filtered and adhered to the first filtration membrane 122 by the intake mechanism 121 so that the laminating part may have relative humidity of 60 to 75% RH at room temperature 22° C.
In the fifteenth or sixteenth aspect of the invention, it is preferable that intake amount by the intake mechanism 121 of the air filtration means 120 is set to 11 m3/min when the first filtration membrane 122 having mesh roughness of 0.3 μm/99.99% is used for the air filtration means 120. It is preferable that intake amount by the intake mechanism 121 of the air filtration means 120 is set to 36 m3/min when the first filtration membrane 122 having mesh roughness of 3 μm/88% is used for the air filtration means 120.
In any of the ninth to the sixteenth aspects of the invention, the panel component 5 comprises a rectangular liquid crystal panel with electric components built therein. The optical functional film 1 or the optical functional film 1′ comprises a polarizing film having a pressure-sensitive adhesive layer which is rectangularly formed so as to match with long sides or short sides of the rectangular liquid crystal panel. Each of the polarizing films are laminated to both surfaces of the liquid crystal panel in a crossed-Nicol arrangement to thereby continuously manufacture an optical display device 6.
In the present apparatus 10, the optical display device 6 is manufactured through a process as follows. A web of laminate 11 at least comprised of a web of optical functional film 01 laminated on a web of carrier film 2 via a pressure-sensitive adhesive layer (4) is fed from a roll R. An optical functional film 1 having a pressure-sensitive adhesive layer 4 cut in a sheet, leaving the web of carrier film 2 behind, is laminated to at least one of opposite surfaces of a rectangular panel component 5 by the pressure-sensitive adhesive layer 4, as shown in the diagrammatic illustration of
In the present apparatus 10′, the optical display device 6 is manufactured as shown in
As described in the above, the optical display device 6 is continuously manufactured by the RTP laminating apparatus 10 or the sheet-type laminating apparatus 10′, and there is no difference in functions of the respective finished optical display devices 6.
The laminating part 100 forms an isolated space. It is preferred that sides of the apparatus parallel to a conveying direction of the panel component 5 shown by thick arrows are sealed. At the laminating part 100, an upstream side 101 crossing the conveying direction of the panel component 5 and a downstream side 102 crossing the conveying direction of the optical display device 6 which has gone through the laminating process may both be shielded with an air curtain etc., for example.
So-called HEPA Filter/Filters that makes/make up a plurality of air filtration means 120 is/are positioned on a top plate 103 of the laminating part 100 as shown in
For air filtration means 120, commercially available HEPA Filter/Filters (BV-RTH1L, manufactured by Panasonic Corporation) comprising an intake mechanism 121 which suction amount per minute is set to 11 m3/min and a first filtration membrane 122 having mesh roughness of 0.3 μm/99.99% etc. is/are used, as shown in a table of
For a spray 1130 of the spray mechanism 113 that makes up the spraying means 110 equipped in the laminating part 100, an also commercially available spray (AKI MIST-E03C, manufactured by H. IKEUCHI & CO., LTD.) having a spray nozzle for minute water droplets which spray amount per minute is set to 0.04 L/min etc. is used, as shown in the table of
A humidified environment formed in the laminating part 100 of Example 1 is shown by items “Room temperature and humidity” and “Effects of humidification” of Example 1 contained in a table of
As apparent from the table of
Example 1 is compared with Comparative Example 1 or 2 contained in a table of
A humidified environment of the laminating part 100 in Comparative Example 1 has relative humidity of 43% RH at room temperature 22° C. When compared with Example 1, naturally, wetting is not generated inside the laminating part 100 according to Comparative Example 1. However, it takes as much as 134 seconds, which is more than three times the case according to Example 1, to attenuate (eliminate) orientation disorder of a liquid crystal caused by static electrification. This value cannot be adopted in a manufacturing process for continuously manufacturing the optical display device 6.
Then, when Comparative Example 2 is considered, air filtration means 120 similar to Example 1 (BV-RTH1L, manufactured by Panasonic Corporation) is deployed on a top plate 103, and a spraying means 110 comprising a spraying mechanism 113 is deployed inside the laminating part 100 similar to the case of Example 1. The difference with Example 1 is that a commercially available spray (Round Mist KSAMF, manufactured by EVERLOY) equipped with a two-fluid nozzle is used as a spray 1130.
The two-fluid nozzle is explained here. It is a type of a fluid nozzle which applies pressure to fluid, such as liquid and/or gas which deforms with a limited force, to blow it out therefrom. The two-fluid nozzle is used to blow out compressed air and water together to make, i.e. to spray, fine droplets of water. The above described commercially available minute-water-droplet spray nozzle (AKI MIST-E03C, manufactured by H. IKEUCHI & CO., LTD.) is also a type of two-fluid nozzle, but is devised by providing a special mechanism to produce smaller water droplets than the conventional two-fluid nozzle.
In this connection, for the two-fluid nozzle of the spray 1130 in Comparative Example 2, a one having a spray amount set to 3.1 L/min (Round Mist KSAMF, manufactured by EVERLOY) shown in a table of
In the humidified environment of the laminating part 100 according to Example 1, it took 42 seconds for attenuating (eliminating) orientation disorder of the liquid crystal caused by static electrification, and this is not a problematic value in the manufacturing process for continuously manufacturing the optical display device. Also, wetting is not generated at the moment the humidified environment is formed. However, wetting is found inside the laminating part 100 after a long period of use such as for one day, for example.
An experiment was performed to check a level which a humidified environment should have so as to be adopted in the continuous manufacturing process of the optical display device 6. It is found out that, when relative humidity is 60% RH or less at room temperature 22° C., the inspection of the panel component 5 is disrupted, as a result that a panel component 5 fed to an inspecting process following a laminating process without the eliminating static charge enough and with orientation disorder of a liquid crystal generated. Thus, it is prone to cause a problem of obstructing continuous manufacturing of the panel component 5.
In addition, when the relative humidity is 75% RH or more at room temperature 22° C., since wetting is generated inside the laminating part 100 at the moment or in a short period of time after the humidified environment is formed, deterioration of a manufacturing apparatus 10 or a manufacturing apparatus 10′ and/or a quality problem in the panel component 5 or the optical functional film 1 or the optical functional film 1′ may arise. Therefore, it is preferable to control the relative humidity so as to be 60 to 75% RH at room temperature 22° C.
The humidified environment of the laminating part 100 which enables sufficient elimination of static electricity while preventing generation of wetting is largely influenced by performance and spraying condition of the spraying mechanism 113. It is preferable that an average particle size of each of the sprayed minute water droplets 20 is 10 μm or less. For example, if the maximum particle size is 50 μm or more, not only wetting inside the laminating part 100 is prone to be generated, but also it may be a factor to cause clogging in a filtration membrane even the spraying mechanism 113 combined with the filtration membrane, for example, is used.
Regarding the spraying condition for forming the appropriate humidified environment of the laminating part 100, the spraying condition in the case of Example 1 is 0.04 L/min. The spraying process is omitted in Comparative Example 1. Thus, in the case of Comparative Example 1, no wetting is generated inside the laminating part 100, but since it takes 134 seconds for eliminating static electricity, it is not possible to eliminate static electricity within appropriate time. Then, the case of Comparative Example 2 which spraying condition is set to 3.1 L/min is considered. At the laminating part 100 of Comparative Example 2, the air filtration means 120 (BV-RTH1L, manufactured by Panasonic Corporation) similar to the one in Example 1 are deployed on the top plate 103 of the laminating part 100 as shown in
According to the experiment, when the spraying condition is 0.02 L/min or less, the sufficient humidified condition may not be formed, thereby it is impossible to eliminate static electricity sufficiently. On the other hand, when the spraying condition is 0.05 L/min or more, even via the filtration membrane, clogging occurs. Thus, the appropriately humidified environment may not be formed. Also, if spraying is performed without the filtration membrane, excess humidification may occur and leads to an inconvenience in which wetting is generated inside the laminating part 100 just after the spraying. Therefore, it is preferable to set the spraying condition of minute water droplets 20 at 0.02 to 0.05 L/min when the average particle size is 10 μm or less as 0.02 to 0.05 L/min.
For the spray 1130 used for the spraying mechanism 113 that makes up the spraying means 110 installed under the top plate 103 over the conveyed panel component 5 inside the laminating part 100, a commercially available spray (AKI MIST-E03C, manufactured by H. IKEUCHI & CO., LTD.) is used as shown in the table of
When Examples 2 to 4 are considered, the first vaporizing and humidifying means 140 and the second vaporizing and humidifying means 150 are both means corresponding to the spraying means 110 equipped in the laminating part 100 configured to correspond to Example 1. As apparent from
In addition, a plurality of exhausting means 130 respectively comprising air outlet(s) is provided on a bottom plate 104 of the laminating part 100 according to Example 2, as well as on that of the laminating part 100 according to Examples 3 or 4, similar to the case according to Example 1. They are activated in coordination with the air filtration means 120, and furthermore, they can be activated in coordination with the first vaporizing and humidifying means 140 or the second vaporizing and humidifying means 150.
On the other hand, a vaporizing and humidifying means that would correspond to the spraying means 110 equipped in the laminating part 100 according to Example 1 is equipped under the top plate 103 which is over the conveyed panel component 5. The vaporizing and humidifying means according to Example 2 is the first vaporizing and humidifying means 140, and the vaporizing and humidifying means according to Examples 3 or 4 is the second vaporizing and humidifying means 150.
For each of the first vaporizing and humidifying means 140 and the second vaporizing and humidifying means 150, a spraying mechanism 113 is installed inside the laminating part 100 so as to correspond with the spraying mechanism 113 of the spraying means 110. However, while the spraying mechanism 113 of the spraying means 110 is configured only by the spray 1130, the spraying mechanism 113 of the first vaporizing and humidifying means 140 has a casing 1140 in which the spray 1130, and a blowing mechanism 114 and a second filtration membrane 115 that are activated in coordination with the spray 1130 are located. In addition, the spraying mechanism 113 of the second vaporizing and humidifying means 150 has a casing 1140 in which the spray 1130, and a suctioning mechanism 116 and a second filtration membrane 115 which are activated in coordination with the spray 1130 are located. Detailed configurations of both of the commercially available equipment are shown in
When the spraying conditions for the cases according to Examples 2 to 4 are considered, as apparent from the table of
Therefore, as apparent from the table of
It is because the spraying mechanism 113 of the laminating part 100 according to Example 1 is provided by the spray 1130 only, whereas each of the laminating parts 100 according to Example 2 and Examples 3 or 4 provides the spraying mechanism 113 in which the blowing mechanism 114 or the suctioning mechanism 116 is combined with the spray 1130 by the casing 1140.
More specifically, as apparent from
For each of these sprays 1130 in all of Examples 2 to 4, the commercially available spray 1130 of AKI MIST-E03C, manufactured by H. IKEUCHI & CO., LTD. is used as shown in a table of
As apparent from the spraying conditions shown in
It is because that, in the spraying mechanism 113 of Examples 2 to 4 is capable forming a humidified environment having relative humidity of 60 to 75% RH at room temperature 22° C. may be formed inside the laminating part 100 by spraying the minute water droplets 20 to the laminating part 100 by the spray 1130 with supply of water controlled, filtering the minute water droplets 20 blown or suctioned to the laminating part 100 by the blowing mechanism 114 or the suctioning mechanism 116 via the second filtration membrane 115, and further vaporizing the minute water droplets 20 filtered and adhered to the second filtration membrane 115 by the blowing mechanism 114 or the suctioning mechanism 116.
Next, the way of forming the humidified environment in the laminating part 100 configured to correspond to any of Examples 5 to 7 or any of Comparative Examples 3 to 6 is described in detail.
As apparent from
Further, the air filtration means 120 positioned on upper surface of the top plate 103 takes in air of the environment with mist formed in the upper air area of the air filtration means 120 inside the laminating part 100 via the first filtration membrane 122 by the intake mechanism 121 such that the humidified environment is formed inside the laminating part 100. That is to say, it works in coordination with the spraying mechanism 113, and it has a function fundamentally different from a performance of the air filtration means 120 according to Examples 1 to 4.
The laminating part 100 according to Examples 5 to 7 or Comparative Examples 3 to 6 has a configuration different from the laminating part 100 according to Examples 1 to 4 in that the spray 1130 that makes up the spraying mechanism 113 of the third vaporizing and humidifying means 170 is positioned outside the laminating part 100 so as to work in coordination with the air filtration means 120. The spraying means 110 according to Example 1, the first vaporizing and humidifying means 140 according to Example 2 or the spraying mechanism 113 of the second vaporizing and humidifying means 150 according to Examples 3 or 4 are each positioned inside the laminating part 100.
As apparent from
Comparative Example 4 contrasted with Example 5 is considered. In Comparative Example 4, the commercially available AST-36-60 manufactured by NIPPON MUKI CO., LTD. is adopted as the air filtering means 120 for the laminating part 100 in order to form such humidified environment. Its intake amount of the intake mechanism 121 that makes up the air filtration means 120 is 36 m3/min. Its performance is three times the intake amount of the intake mechanism 121 that makes up the air filtration means of Examples 1 to 4, which is 11 m3/min. Mesh roughness of 3 μm/88% is used for the first filtration membrane 122 that makes up the air filtration means 120 of Comparative Example 4. It is a roughness of about ten times the mesh roughness of the first filtration membrane 122 that makes up the air filtration means 120 of Examples 1 to 4, which is 0.3 μm/99.99%.
Next, when the spraying condition of a case according to Comparative Examples 3 or 4 is considered, each of the spraying conditions is 3.1 L/min which is greater than the spraying condition in the case of Example 5, which is 0.04 L/min, and it is the same as in the case according to Comparative Example 2 already considered. In both cases, the spray 1130 that makes up the spraying mechanism 113 is similarly positioned outside the laminating part 100 so as to work in coordination with air filtration means 120. In addition, in Comparative Example 3, BV-RTH1L manufactured by Panasonic Corporation which intake amount is set to 11 m3/min as in Examples 1 to 4 is used. In Comparative Example 4, AST-36-60 manufactured by NIPPON MUKI CO., LTD which intake amount is set to 11 m3/min is used. By the way, minute water droplets 20 fed to the first filtration membrane 122 are treated differently in that, in the case according to Comparative Example 3, the droplets are treated with the first filtration membrane 122 having mesh roughness of 0.3 μm/99.99%, whereas in the case according to Comparative Example 4, the droplets are treated with the first filtration membrane 122 having mesh roughness of 3 μm/88%, which is about ten times the mesh roughness of the membrane of Comparative Example 3.
In the case according to Comparative Examples 3 or 4, as shown in the table of
Examples 6 or 7 is considered. In the case according to Example 6, the spraying condition is set to 0.02 L/min so as to achieve 65% RH which is close to the minimum value of relative humidity at room temperature 22° C. In the case according to Example 7, the spraying condition is set to 0.05 L/min so as to achieve 75% RH which is the maximum value of relative humidity at room temperature 22° C. In both cases, other conditions are set the same as in the case according to Example 5. As a result, in both cases, clogging in the first filtration 122 membrane does not occur, and no wetting is generated inside the laminating part 100. In the case according to Example 6, it takes 83 seconds for attenuating (eliminating) orientation disorder of the liquid crystal caused by static electrification, which is a value close to the limit which may be adopted in the continuous manufacturing process of the optical display device. In the case according to Example 7, it takes 46 seconds which is a value which may be adopted without any problem in the continuous manufacturing process of the optical display device.
Comparative Examples 5 or 6 contrasted with Examples 5 to 7 is considered. The spraying condition in the case of Comparative Example 5 is set to 0.01 L/min. The spraying condition in the case of Comparative Example 6 is set to 0.06 L/min. Other conditions in both cases are set the same as in the cases according to Examples 5 to 7. As a result, in the case according to Comparative Example 5, relative humidity at room temperature 22° C. is 55% RH at a maximum, and it takes 120 seconds for attenuating (eliminating) orientation disorder of the liquid crystal caused by static electrification. In addition, in the case according to Comparative Example 6, relative humidity at room temperature 22° C. is 50% RH at a maximum. The experiment result in Comparative Example 6 is found as above despite the fact that the spraying condition is 0.06 L/min, which is six times more of the spray amount of that of in the case according to Comparative Example 5 in which spraying condition is 0.01 L/min.
Further as shown in
From the description above, and as apparent from Examples 1 to 7, the present invention allows continuous manufacturing of the optical display device 6 while eliminating electrical charge of the optical display device 6 caused by generation of static electricity in the optically functional film 1 or the optically functional film 1′ and/or the panel component 5 when continuously manufacturing the optical display device 6 by way of the following. A humidified environment is formed such that relative humidity becomes 60 to 75% RH when room temperature is 22° C., in at least one isolated laminating part 100 that makes up a part of the RTP laminating apparatus 10 or the sheet-type laminating apparatus 10′ for continuously manufacturing the optical display device 6 by laminating the optical functional film 1 or the optical functional film 1′ to the panel component 5. That is to say, the present invention is characterized in a method and apparatus for eliminating static electricity of the optical display device 6 in which electrostatic amount of the optical display device 6 statically electrified in a process of continuous manufacturing is quickly lowered in the humidified environment formed in the laminating part 100 of the RTP laminating apparatus 10 or the sheet-type laminating apparatus 10′.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2015-182743 | Sep 2015 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2015/080981 | 11/4/2015 | WO | 00 |
