WO2011099415A1 - 液晶表示装置およびその製造方法 - Google Patents
液晶表示装置およびその製造方法 Download PDFInfo
- Publication number
- WO2011099415A1 WO2011099415A1 PCT/JP2011/052256 JP2011052256W WO2011099415A1 WO 2011099415 A1 WO2011099415 A1 WO 2011099415A1 JP 2011052256 W JP2011052256 W JP 2011052256W WO 2011099415 A1 WO2011099415 A1 WO 2011099415A1
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- WO
- WIPO (PCT)
- Prior art keywords
- film
- liquid crystal
- polarizing film
- protective film
- display device
- 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.)
- Ceased
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/0073—Optical laminates
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00634—Production of filters
- B29D11/00644—Production of filters polarizing
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1303—Apparatus specially adapted to the manufacture of LCDs
-
- 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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/133325—Assembling processes
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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
-
- 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
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/50—Protective arrangements
Definitions
- the present invention relates to a liquid crystal display device in which a polarizing plate is attached to a liquid crystal panel, and a method for manufacturing the liquid crystal display device.
- Polarizing films are widely used as polarized light supplying elements or polarized light detecting elements in liquid crystal display devices mounted on mobile devices such as notebook personal computers and mobile phones, and in various products such as large televisions. .
- a protective film is bonded via an adhesive layer.
- Patent Documents 1 and 2 describe a polarizing plate in which a protective film is bonded to the entire surface of a polarizing film.
- a liquid crystal display device in which a polarizing plate is attached to a liquid crystal panel is modularized by attaching a frame made of metal or resin to its four sides (peripheral portions), and further, various wirings and the like are made on the casing.
- the final product is a notebook personal computer, a mobile device such as a mobile phone, and a large television.
- the four sides of the polarizing film are formed on the four sides of the frame body in order to prevent deterioration of the display screen due to light leaking from the peripheral portion of the liquid crystal display device. Attach the frame so that it is hidden inside.
- the polarizing film is modularized, its four sides (peripheral portions) are covered with a frame having a width of about 5 to 10 mm.
- the protective film is peeled off from the polarizing film before modularization, the polarizing film is exposed. For this reason, the liquid crystal display device is modularized, and further, there is a high possibility that the polarizing film is damaged in the manufacturing process from various assembly processes to the final product. When the polarizing film is damaged, it is necessary to replace the liquid crystal display device. In other words, in the conventional liquid crystal display device, there is a risk of scratching the polarizing film in the manufacturing process from modularization to the final product, which reduces the productivity and yield of the final product (the defect rate increases). )) Cannot be avoided.
- the present invention has been made in view of the above-mentioned problems, and its main purpose is to avoid the problem that the polarizing film may be damaged in the manufacturing process from modularization to the final product.
- An object of the present invention is to provide a liquid crystal display device that can be used and a method for manufacturing the liquid crystal display device.
- the liquid crystal display device is a liquid crystal display device in which a polarizing plate in which a protective film is bonded to a polarizing film is bonded to a liquid crystal panel, and the protective film The end of is located inside the polarizing film from the end of the polarizing film.
- the end portion of the protective film is located 6 to 11 mm inside the end portion of the polarizing film.
- the manufacturing method of the liquid crystal display device includes an attaching step of attaching a polarizing film to a liquid crystal panel, and an end portion of the protective film rather than an end portion of the polarizing film in order to solve the above-described problem.
- the manufacturing method of the liquid crystal display device which concerns on this invention performs a bonding process after a sticking process.
- the sticking step is preferably a step of sticking to a liquid crystal panel while cutting a long polarizing film.
- the bonding step is preferably a step of bonding to a polarizing film while cutting a long protective film.
- the edge part of a protective film is located inside the said polarizing film rather than the edge part of a polarizing film. For this reason, even after the frame is attached to the four sides of the liquid crystal display device and modularized, that is, after the four sides (peripheral part) of the polarizing film are covered by the frame, the four sides (peripheral part) of the protective film ) Is not covered by the frame, the protective film can be peeled from the polarizing film. That is, when the frame is attached to the four sides of the liquid crystal display device to form a module, there is no need to peel off the protective film from the polarizing film in advance.
- the state where the protective film is bonded to the polarizing film can be maintained. That is, the protective film can be peeled from the polarizing film at the end of the manufacturing process.
- This provides a liquid crystal display device capable of avoiding the problem that the polarizing film may be damaged in the manufacturing process from modularization to final product, and a method for manufacturing the liquid crystal display device can do.
- the end portion of the protective film is located inside the polarizing film rather than the end portion of the polarizing film, after modularizing the liquid crystal display device, Furthermore, the state which bonded the protective film to the polarizing film can be maintained in the manufacturing process from various assembly steps to the final product. That is, even after the four sides (peripheral part) of the polarizing film are covered with the frame, the protective film is peeled off from the polarizing film at the end of the manufacturing process because the four sides (peripheral part) of the protective film are not covered with the frame. be able to.
- the liquid crystal display device and the manufacturing method thereof according to the present invention there is no possibility that the polarizing film is damaged in the manufacturing process from modularization to the final product. Can be increased (the defective rate can be decreased).
- FIG. 1 is a plan view showing a schematic configuration of a liquid crystal display device according to the present invention.
- BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows an example of the manufacturing method of the liquid crystal display device which concerns on this invention, and shows the structure of the outline of a manufacturing apparatus.
- the liquid crystal display device is a liquid crystal display device in which a polarizing plate formed by bonding a protective film to a polarizing film is bonded to a liquid crystal panel, and an end portion of the protective film is formed of the polarizing film. It is the structure located inside the said polarizing film rather than an edge part.
- the manufacturing method of the liquid crystal display device according to the present invention includes an attaching step of attaching a polarizing film to a liquid crystal panel, and the end of the protective film at the center of the polarizing film rather than the end of the polarizing film. It is the structure including the bonding process of bonding the said protective film to a polarizing film so that it may be located in the side.
- FIGS. 1 and 2 An embodiment of the present invention will be described with reference to FIGS. 1 and 2 as follows. However, the present invention is not limited to this, and can be implemented in a mode in which various modifications are added within the range described.
- FIG. 1 An example of the configuration of the liquid crystal display device according to the present invention will be described.
- a polarizing film 3 and a protective film 4 are laminated in this order on the front and back surfaces of a liquid crystal panel 2 (in FIG. 1, the liquid crystal panel is shown).
- the polarizing film and the protective film on the back surface of 2 are omitted without being shown).
- the liquid crystal panel 2 a known liquid crystal panel is preferably used. More specifically, the liquid crystal panel 2 includes a known liquid crystal panel that includes a pair of substrates such as a glass substrate and a liquid crystal layer, and an alignment film is disposed between the substrate and the liquid crystal layer.
- a known liquid crystal panel that includes a pair of substrates such as a glass substrate and a liquid crystal layer, and an alignment film is disposed between the substrate and the liquid crystal layer.
- polarizing film 3 a known polarizing film is preferably used. More specifically, as the polarizing film 3, protective films are attached to both surfaces of the polarizer film, and an adhesive layer is formed on the protective film on the side attached to at least the liquid crystal panel 2. The well-known polarizing film is mentioned. The pressure-sensitive adhesive layer is formed in order to bond a release film (described later) to the polarizing film 3 and to attach the polarizing film 3 to the liquid crystal panel 2.
- the polarizer film examples include, for example, a film made of polyvinyl alcohol, partially formalized polyvinyl alcohol, a partially saponified ethylene-vinyl acetate copolymer, a hydrophilic polymer such as cellulose, a uniaxially stretched, and a pigment such as iodine. And a film subjected to various processes such as hue adjustment.
- the manufacturing method of a polarizer film is not limited to said manufacturing method, A well-known polarizer film is used suitably.
- the protective film examples include TAC (triacetylcellulose) film, cycloolefin resin film, cellulose acetate resin film such as diacetylcellulose, polyester resin film such as polyethylene terephthalate, polyethylene naphthalate, and polybutylene terephthalate, polycarbonate resin film, Known films such as an acrylic resin film and a polypropylene resin film can be used.
- TAC triacetylcellulose
- cycloolefin resin film such as diacetylcellulose
- polyester resin film such as polyethylene terephthalate, polyethylene naphthalate, and polybutylene terephthalate
- polycarbonate resin film Known films such as an acrylic resin film and a polypropylene resin film can be used.
- the thickness of the polarizing film 3 is not particularly limited, but is generally 10 ⁇ m or more and 300 ⁇ m or less.
- the polarizing film 3 may further include other layers in addition to the three layers (a protective layer, a polarizer film, and a protective layer) as long as there is no practical problem.
- the polarizing film 3 may further include a pressure-sensitive adhesive layer (may be an adhesive layer) that adheres the polarizer film and the protective film.
- the polarizing film 3 is attached to both surfaces of the liquid crystal panel 2 so as to cover the entire display area of the liquid crystal panel 2 (the entire surface of the display screen).
- a known protective film is preferably used. More specifically, examples of the protective film 4 include known protective films such as a polyester film, a polyethylene terephthalate film, a polyethylene film, a polypropylene film, and a polystyrene film.
- the pressure-sensitive adhesive layer is formed on the surface of the protective film 4 that is bonded to the polarizing film 3.
- the pressure-sensitive adhesive layer is formed in order to bond the protective film 4 to the polarizing film 3.
- the thickness of the protective film 4 is not particularly limited, but is generally 10 ⁇ m or more and 100 ⁇ m or less.
- the polarizing film 3 and the protective film 4 are laminated in this order on the front and back surfaces of the liquid crystal panel 2, and as shown in FIG.
- a frame 5 made of metal or resin is attached to the periphery) to form a module (in FIG. 1, the three-sided frame 5 is not shown but not shown). That is, when the frame 5 is attached to the four sides of the liquid crystal display device 1 to form a module, the polarizing film 3 is prevented from being deteriorated by preventing leakage of light from the peripheral edge of the liquid crystal display device 1.
- the frame body 5 is attached so that the four sides are hidden inside the frame body 5.
- the polarizing film 3 is modularized, its four sides (peripheral portions) are covered with the frame 5 by about 5 to 10 mm in width.
- the four sides (ends) of the protective film 4 are positioned inside the polarizing film 3 rather than the four sides (ends) of the polarizing film 3.
- the protective film 4 is bonded to the polarizing film 3 so that the width W 0 is 6 to 11 mm according to the width (size) of the frame body 5.
- the width W 0 refers to the distance from the end of the polarizing film 3 to the adjacent end of the protective film 4. More specifically, when the peripheral portion of the polarizing film 3 is covered by the frame 5 with a width of 5 mm, the protective film 4 is bonded to the polarizing film 3 so that the width W 0 is 6 mm.
- the protective film 4 is bonded to the polarizing film 3 so that the width W 0 is 11 mm.
- a polarizing plate is formed by bonding the protective film 4 to the polarizing film 3.
- a gap W1 of about 1 mm is formed between the frame 5 and the adjacent end of the protective film 4. That is, the width W 0 is set such that the gap W 1 is formed by about 1 mm according to the width of the frame 5. Therefore, it is possible to maintain the state in which the protective film 4 is bonded to the polarizing film 3 in the manufacturing process from various assembly steps to the final product. That is, in the liquid crystal display device 1 according to the present embodiment, the end portion of the protective film 4 is located inside the polarizing film 3 relative to the end portion of the polarizing film 3, so that the liquid crystal display device 1 is a module.
- the state in which the protective film 4 is bonded to the polarizing film 3 can be maintained. That is, even after the four sides (peripheral part) of the polarizing film 3 are covered with the frame body 5, the four sides (peripheral part) of the protective film 4 are not covered with the frame body 5.
- the protective film 4 can be peeled from 3. Therefore, since there is no possibility that the polarizing film 3 is damaged, the productivity and yield of the final product can be increased (the defective rate is decreased).
- the gap W 1 is not limited to the exemplified 1 mm, and may be provided so that the protective film 4 can be peeled from the polarizing film 3 at the end of the manufacturing process. In view of the purpose of protection, it is desirable to be as narrow as possible.
- the width W 0 in accordance with the width of the frame body 5 is set, the width W 0 of the four sides of the protective film 4 may be the same as each other or may be different. Therefore, the shape of the protective film 4 and the shape of the polarizing film 3 may be different from each other, or may be similar (that is, so-called slightly smaller dimensions).
- the size (area) of the protective film 4 is smaller than the size (area) of the polarizing film 3. Therefore, since the usage-amount of the protective film 4 with respect to the polarizing film 3 becomes smaller than before, cost can be reduced.
- the peripheral part of the polarizing film 3 is in a state where the surface is not protected by the protective film 4, there is a risk of scratches.
- the peripheral portion of the polarizing film 3 is covered with the frame body 5 by attaching the frame body 5 to the four sides of the liquid crystal display device 1 to form a module. That is, even if the peripheral edge portion of the polarizing film 3 is damaged, it is covered with the frame 5 so that no substantial adverse effect occurs. For this reason, there is no possibility that the quality of the display screen of the liquid crystal display device 2 will deteriorate.
- the liquid crystal display device manufacturing apparatus 10 is a manufacturing apparatus that employs a so-called roll to panel method for continuously manufacturing the liquid crystal display device 1. It has a two-stage structure in which a film conveyance mechanism 20 is provided in the part and a panel conveyance mechanism 30 is provided in the upper (second floor) part. Thereby, space saving of the manufacturing apparatus 10 can be achieved.
- the film transport mechanism 20 unwinds the long polarizing film original fabric 3a wound up in a roll shape and transports it to the sticking unit 31, and winds the long release film 3b that is no longer needed.
- 21 and a protective film transport mechanism 22 that unwinds the long protective film raw material 4a wound up in a roll shape and transports it to the bonding section 32, and winds up the long release film 4b that is no longer necessary. I have.
- the said polarizing film conveyance mechanism 21 and the protective film conveyance mechanism 22 are arrange
- the said polarizing film original fabric 3a is a film laminated body comprised from the polarizing film 3, the adhesive layer, and the peeling film 3b, and the surface of the polarizing film 3 by which the liquid crystal panel 2 is affixed on an adhesive layer ( A release film 3b that can be peeled off via an adhesive layer) is bonded.
- the pressure-sensitive adhesive layer is not particularly limited, and is configured by applying a known pressure-sensitive adhesive (or adhesive) used in the technical field. What is necessary is just to set the thickness of an adhesive layer suitably.
- the release film (also referred to as a protective film or a separator) 3b does not damage the surface of the polarizing film 3 (the surface that is attached to the liquid crystal panel 2) until the polarizing film 3 is attached to the liquid crystal panel 2.
- the polarizing film 3 is peeled from the polarizing film 3 when the polarizing film 3 is attached to the liquid crystal panel 2.
- a film of polyethylene resin, polypropylene resin, polystyrene resin, polyethylene terephthalate resin, or the like can be used.
- the thickness of the release film 3b is not particularly limited, but is generally 10 ⁇ m or more and 100 ⁇ m or less.
- the width of the polarizing film original fabric 3a that is, the width of the polarizing film 3 is generally about 300 to 1500 mm.
- the protective film is not bonded on the other surface.
- the polarizing film original fabric 3a is wound up in a roll shape, the surface of the polarizing film 3 on the side where the release film is not bonded is covered with the overlapped release film 3b and is damaged. There is no fear.
- the said protective film raw fabric 4a is a film laminated body comprised from the protective film 4, the adhesive layer, and the peeling film 4b, and the adhesive layer ( A release film 4b that can be peeled off via an adhesive layer may be bonded.
- the pressure-sensitive adhesive layer is not particularly limited, and is configured by applying a known pressure-sensitive adhesive (or adhesive) used in the technical field. What is necessary is just to set the thickness of an adhesive layer suitably.
- the release film (also referred to as a protective film or a separator) 4b protects the adhesive layer from dust until the protective film 4 is bonded to the polarizing film 3, and the protective film 4 is polarized. It peels from the protective film 4 when bonding to the film 3.
- a film of polyethylene resin, polypropylene resin, polystyrene resin, polyethylene terephthalate resin, or the like can be used as the release film 4b.
- the thickness of the release film 4b is not particularly limited, but is generally 10 ⁇ m or more and 100 ⁇ m or less.
- the width of the protective film original 4a that is, the width of the protective film 4 is set to be 12 to 22 mm narrower than the width of the polarizing film 3 in accordance with the width of the frame 5 (FIG. 1). .
- the polarizing film transport mechanism 21 located on the upstream side in the transport direction of the liquid crystal panel 2 includes an unwinding unit 21a, a winding unit 21b, a half cutter (not shown), a knife edge 21c, and a roller group 21d.
- a long polarizing film original fabric 3a is installed in the unwinding portion 21a, and the polarizing film original fabric 3a is unwound.
- the said polarizing film original fabric 3a is wound up by the unwinding part 21a so that the direction of the absorption axis of the polarizing film 3 may be located in the conveyance direction.
- the winding part 21b winds up the long release film 3b.
- the polarizing film transport mechanism 21 is provided with an unwinding portion 21a and a winding portion 21b so that when the remaining amount of the polarizing film original fabric 3a decreases, it can be switched to a new polarizing film original fabric in a short time. You may have two.
- the half cutter is provided on the upstream side (unwinding part 21a side) from the knife edge 21c, and the polarizing film original fabric 3a is half-cut to cut the polarizing film 3 and the adhesive layer. That is, the half cutter cuts the long polarizing film 3 to a predetermined length without cutting the release film 3b.
- a known cutter such as a blade or a laser cutter is preferably used.
- the knife edge 21c peels the peeling film 3b from the polarizing film 3 cut to a predetermined length.
- the pressure-sensitive adhesive layer formed between the polarizing film 3 and the release film 3b remains on the polarizing film 3 side after the release film 3b is released.
- the roller group 21d is provided so that the polarizing film original fabric 3a can be conveyed by applying a certain tension to the polarizing film original fabric 3a.
- the protective film transport mechanism 22 located on the downstream side in the transport direction of the liquid crystal panel 2 has the same configuration as the polarizing film transport mechanism 21, and includes an unwinding part 22a, a winding part 22b, a half cutter (not shown), A knife edge 22c and a roller group 22d are provided.
- a long protective film original fabric 4a is installed in the unwinding portion 22a, and the protective film original fabric 4a is unwound.
- the winding portion 22b is configured to wind up the long release film 4b.
- the protective film conveyance mechanism 22 sets the unwinding part 22a, the winding part 22b, etc. so that it can switch to a new protective film original fabric in a short time when the remaining amount of the protective film original fabric 4a decreases. You may have two.
- the half cutter is provided on the upstream side (the unwinding portion 22a side) from the knife edge 22c, and the protective film original fabric 4a is half-cut to cut the protective film 4 and the adhesive layer. That is, the half cutter cuts the long protective film 4 to a length 12 to 22 mm shorter than the length of the polarizing film 3 without cutting the release film 4b.
- a known cutter such as a blade or a laser cutter is preferably used.
- the knife edge 22c peels the release film 4b from the protective film 4 cut to a predetermined length.
- the pressure-sensitive adhesive layer formed between the protective film 4 and the release film 4b remains on the protective film 4 side after the release film 4b is peeled off.
- the roller group 21d is provided so that a certain tension is applied to the protective film original fabric 4a and the protective film original fabric 4a can be conveyed.
- the panel transport mechanism 30 includes a sticking unit 31, a bonding unit 32, and a plurality of transport rollers (not shown).
- the panel transport mechanism 30 transports the sheet-like liquid crystal panel 2 by driving the transport roller and sticks.
- the polarizing film 3 and the protective film 4 unwound by the film transport mechanism 20 by the unit 31 and the bonding unit 32 are bonded and bonded to the surface of the liquid crystal panel 2 (that is, a polarizing plate is bonded). It has become.
- the panel transport mechanism 30 rectifies downflow (supply of clean air) from above the liquid crystal panel 2, thereby transporting, sticking, and pasting the liquid crystal panel 2 in a stable state. Be able to.
- the panel transport mechanism 30 transports the liquid crystal panel 2 along the polarizing film transport mechanism 21 and the protective film transport mechanism 22 arranged in a straight line. That is, the manufacturing apparatus 10 has a transport direction center line of the liquid crystal panel 2 transported by the panel transport mechanism 30 and a transport direction center line of the polarizing film 3 transported by the polarizing film transport mechanism 21 when viewed from above. Each transport mechanism is arranged so that the center line in the transport direction of the protective film 4 transported by the protective film transport mechanism 22 coincides. Therefore, the manufacturing apparatus 10 has a structure in which each transport mechanism is arranged in a straight line and is not arranged in a complicated shape such as an L-shape, so that the installation is very simple and the area efficiency is excellent. ing.
- the sticking part 31 is composed of a pair of nip rolls 31a and 31a forming a nip part, and has a function of sticking the polarizing film 3 to the surface of the liquid crystal panel 2 via an adhesive layer. And the polarizing film 3 conveyed to the sticking part 31 is aligned with the liquid crystal panel 2 (more specifically, the conveying direction) so as to cover the entire display area of the liquid crystal panel 2 (the entire surface of the display screen). Is aligned to the liquid crystal panel 2.
- known nip rolls such as a pressure roll and a pressure roll are preferably used. Further, the nip rolls 31a and 31a can appropriately adjust the pressure (nip pressure) and temperature of the nip portion as necessary.
- the bonding part 32 is composed of a pair of nip rolls 32a and 32a that form a nip part, and has a function of bonding the protective film 4 to the surface of the polarizing film 3 via an adhesive layer. And as for the protective film 4 conveyed by the sticking part 32, the edge part (more specifically, the front-end
- the nip rolls 32a and 32a known nip rolls such as a pressure-bonding roll and a pressure roll are preferably used. Further, the nip rolls 32a and 32a can appropriately adjust the pressure (nip pressure) and temperature of the nip portion as necessary. In addition, a polarizing plate is formed by bonding the protective film 4 to the polarizing film 3.
- the manufacturing apparatus 10 includes a pair of film transport mechanisms 20 and a turning reversal mechanism that turns and reverses the liquid crystal panel 2 so that the polarizing film 3 can be attached to both surfaces of the liquid crystal panel 2.
- the turning reversing mechanism includes, for example, a suction mechanism that sucks and turns the liquid crystal panel 2 and a robot arm mechanism that turns the liquid crystal panel 2 with the liquid crystal panel 2 interposed therebetween, and turns (turns) the liquid crystal panel 2 by 90 °. ) And 180 degrees (turn over).
- the liquid crystal panel 2 is swung and reversed by the swivel reversing mechanism.
- the polarizing film 3 and the protective film 4 are bonded and bonded to the other surface by the eye film transport mechanism 20 to obtain the liquid crystal display device 1.
- the manufacturing apparatus 10 includes a control unit (not shown) that controls the operation of each of the transport mechanisms. That is, the control unit controls the transport speed of the liquid crystal panel 2 in the panel transport mechanism 30, the transport speed of the polarizing film original fabric 3 a between the unwinding section 21 a and the winding section 21 b in the polarizing film transport mechanism 21, and the polarizing film 3 by a half cutter.
- the polarizing film 3 is stuck on both surfaces of the liquid crystal panel 2 by changing the arrangement (and the number) of the polarizing film conveying mechanism 21 and the protective film conveying mechanism 22 and the turning inversion mechanism in the pair of film conveying mechanisms 20. Then, the protective film 4 can be bonded. That is, the first polarizing film transport mechanism 21, the turning inversion mechanism, the second polarizing film transport mechanism 21, the first protective film transport mechanism 22, the turning inversion mechanism, and the second protective film transport mechanism 22
- the liquid crystal display device 1 can also be manufactured by arranging in this order.
- the liquid crystal panel 2 is rotated and reversed by the turning reversing mechanism after the polarizing film 3 is adhered to one surface by the first polarizing film transport mechanism 21, and then the second polarizing film After the polarizing film 3 and the protective film 4 are pasted and bonded to the other surface by the film transport mechanism 21 and the first protective film transport mechanism 22, they are swung and reversed again by the swivel reversing mechanism.
- the protective film 4 is bonded to the one surface by the second protective film transport mechanism 22, whereby the liquid crystal display device 1 is obtained.
- the manufacturing process of the liquid crystal display device 1 mainly includes a transport process, a sticking process, a bonding process, and the like.
- the liquid crystal panel 2 is transported at a constant speed by driving a plurality of transport rollers in the panel transport mechanism 30.
- This conveyance process is also performed while performing the sticking process and the bonding process. That is, the conveyance process is performed throughout the manufacturing process.
- the polarizing film original fabric 3a is transported, and the long polarizing film 3 is cut into a set length by a half cutter. To do. And while peeling the peeling film 3b from the polarizing film 3 with the knife edge 21c, and aiming at the timing of sticking of the polarizing film 3 with respect to the liquid crystal panel 2, that is, aligning the polarizing film 3 with respect to the liquid crystal panel 2, The polarizing film 3 is conveyed to the nip part of the sticking part 31.
- the sticking step is a step of sticking to the liquid crystal panel 2 while cutting the long polarizing film 3.
- the protective film original fabric 4a is conveyed by driving the unwinding portion 22a and the winding portion 22b in the protective film conveying mechanism 22, and the long protective film 4 is cut into a set length by a half cutter. To do. And while peeling the peeling film 4b from the protective film 4 with the knife edge 22c, while aiming at the timing of bonding of the protective film 4 with respect to the polarizing film 3, ie, performing alignment of the protective film 4 with respect to the polarizing film 3, The said protective film 4 is conveyed to the nip part of the bonding part 32.
- the protective film 4 is bonded to the polarizing film 3 while applying a predetermined pressure (nip pressure) at the bonding portion 32 in the panel transport mechanism 30 (bonding step). That is, the protective film 4 is bonded to the polarizing film 3 so that the end of the protective film 4 is located closer to the center of the polarizing film 3 than the end of the polarizing film 3. Therefore, the bonding step is a step of bonding to the polarizing film 3 while cutting the long protective film 4. Moreover, the polarizing plate was formed by bonding the protective film 4 to the polarizing film 3.
- the liquid crystal panel 2 having the polarizing film 3 and the protective film 4 attached and bonded to one surface is turned and inverted by the turning inversion mechanism.
- the polarizing film 3 and the protective film 4 are bonded and bonded to the other surface of the liquid crystal panel 2 by performing the same bonding process and bonding process as the above-described bonding process and bonding process (that is, A polarizing plate is attached). Thereby, the liquid crystal display device 1 according to the present embodiment is manufactured.
- the end portion of the protective film 4 in the manufactured liquid crystal display device 1 is positioned inside the polarizing film 3 with respect to the end portion of the polarizing film 3. For this reason, after the liquid crystal display device 1 is modularized, the state in which the protective film 4 is bonded to the polarizing film 3 can be maintained in the manufacturing process from various assembly processes to the final product. That is, even after the four sides (peripheral part) of the polarizing film 3 are covered with the frame body 5, the four sides (peripheral part) of the protective film 4 are not covered with the frame body 5.
- the protective film 4 can be peeled from 3. Therefore, since there is no possibility that the polarizing film 3 is damaged, the productivity and yield of the final product can be increased (the defective rate is decreased).
- the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the technical means disclosed in different embodiments can be appropriately combined. Such embodiments are also included in the technical scope of the present invention.
- the number of roller groups in the manufacturing apparatus or the arrangement of each transport mechanism including the unwinding unit and the winding unit is not limited to the illustrated number and arrangement.
- the liquid crystal display device and the manufacturing method thereof according to the present invention there is no risk of scratching the polarizing film in the manufacturing process from modularization to the final product, so the productivity and yield of the final product are increased. (Defect rate can be reduced). Therefore, the liquid crystal display device and the manufacturing method thereof according to the present invention can be widely used in various industries that manufacture mobile devices such as notebook personal computers and mobile phones, and large televisions.
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Abstract
Description
本発明に係る液晶表示装置の構成の一例について説明する。図1に示すように、本実施の形態に係る液晶表示装置1は、液晶パネル2の表面および裏面に、偏光フィルム3および保護フィルム4がこの順に積層されてなっている(図1では液晶パネル2の裏面の偏光フィルムおよび保護フィルムは図示しないで省略している)。
本発明に係る液晶表示装置の製造方法を採用した製造装置の構成の一例について説明する。図2に示すように、本実施の形態に係る液晶表示装置の製造装置10は、液晶表示装置1を連続的に製造するいわゆるRoll to Panel方式を採用した製造装置であり、下段(1階)部分にフィルム搬送機構20、上段(2階)部分にパネル搬送機構30を備えた二段構造となっている。これにより、製造装置10の省スペース化を図ることができる。
2 液晶パネル
3 偏光フィルム
3a 偏光フィルム原反
3b 剥離フィルム
4 保護フィルム
4a 保護フィルム原反
4b 剥離フィルム
5 枠体
10 製造装置
20 フィルム搬送機構
21 偏光フィルム搬送機構
22 保護フィルム搬送機構
30 パネル搬送機構
31 貼着部
32 貼合部
Claims (6)
- 偏光フィルムに保護フィルムが貼合されてなる偏光板を液晶パネルに貼着してなる液晶表示装置であって、
上記保護フィルムの端部は、上記偏光フィルムの端部よりも当該偏光フィルムの内側に位置している液晶表示装置。 - 上記保護フィルムの端部は、上記偏光フィルムの端部よりも6~11mm内側に位置している請求項1に記載の液晶表示装置。
- 液晶パネルに偏光フィルムを貼着する貼着工程と、
上記偏光フィルムの端部よりも、保護フィルムの端部の方が当該偏光フィルムの中心側に位置するように、当該保護フィルムを偏光フィルムに貼合する貼合工程とを含む液晶表示装置の製造方法。 - 貼着工程の後に貼合工程を行う請求項3に記載の液晶表示装置の製造方法。
- 上記貼着工程は、長尺の偏光フィルムを切断しながら液晶パネルに貼着する工程である請求項3または4に記載の液晶表示装置の製造方法。
- 上記貼合工程は、長尺の保護フィルムを切断しながら偏光フィルムに貼合する工程である請求項3,4または5に記載の液晶表示装置の製造方法。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011800094662A CN102763028A (zh) | 2010-02-15 | 2011-02-03 | 液晶显示装置及其制造方法 |
| KR1020127022774A KR20130004278A (ko) | 2010-02-15 | 2011-02-03 | 액정 표시 장치 및 그 제조 방법 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-029987 | 2010-02-15 | ||
| JP2010029987A JP5314618B2 (ja) | 2010-02-15 | 2010-02-15 | 液晶表示装置の製造方法 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2011099415A1 true WO2011099415A1 (ja) | 2011-08-18 |
Family
ID=44367690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2011/052256 Ceased WO2011099415A1 (ja) | 2010-02-15 | 2011-02-03 | 液晶表示装置およびその製造方法 |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP5314618B2 (ja) |
| KR (1) | KR20130004278A (ja) |
| CN (1) | CN102763028A (ja) |
| TW (1) | TW201137459A (ja) |
| WO (1) | WO2011099415A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018180512A (ja) * | 2017-04-04 | 2018-11-15 | 住友化学株式会社 | プロテクトフィルム付偏光板及び液晶パネル |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102307693B1 (ko) | 2014-12-12 | 2021-10-06 | 삼성디스플레이 주식회사 | 표시패널 및 이의 제조방법 |
| JP6442435B2 (ja) * | 2016-05-26 | 2018-12-19 | 住友化学株式会社 | 偏光板、及び液晶表示装置 |
| JP7018711B2 (ja) * | 2017-02-28 | 2022-02-14 | 住友化学株式会社 | 偏光板の製造方法 |
| KR102510750B1 (ko) * | 2017-04-04 | 2023-03-15 | 스미또모 가가꾸 가부시키가이샤 | 프로텍트 필름 부착 편광판 및 액정 패널 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008070762A (ja) * | 2006-09-15 | 2008-03-27 | Pioneer Electronic Corp | 表示装置の保護構造及び保護方法 |
| JP3142328U (ja) * | 2008-02-26 | 2008-06-12 | 株式会社パワーサポート | セパレータ付き保護フィルム |
| JP4307510B1 (ja) * | 2007-12-27 | 2009-08-05 | 日東電工株式会社 | 光学表示装置の製造システム及び製造方法 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003262725A (ja) * | 2002-03-08 | 2003-09-19 | Fuji Photo Film Co Ltd | 偏光板保護フイルム及び偏光板 |
-
2010
- 2010-02-15 JP JP2010029987A patent/JP5314618B2/ja not_active Expired - Fee Related
-
2011
- 2011-02-03 CN CN2011800094662A patent/CN102763028A/zh active Pending
- 2011-02-03 KR KR1020127022774A patent/KR20130004278A/ko not_active Withdrawn
- 2011-02-03 WO PCT/JP2011/052256 patent/WO2011099415A1/ja not_active Ceased
- 2011-02-14 TW TW100104721A patent/TW201137459A/zh unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008070762A (ja) * | 2006-09-15 | 2008-03-27 | Pioneer Electronic Corp | 表示装置の保護構造及び保護方法 |
| JP4307510B1 (ja) * | 2007-12-27 | 2009-08-05 | 日東電工株式会社 | 光学表示装置の製造システム及び製造方法 |
| JP3142328U (ja) * | 2008-02-26 | 2008-06-12 | 株式会社パワーサポート | セパレータ付き保護フィルム |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018180512A (ja) * | 2017-04-04 | 2018-11-15 | 住友化学株式会社 | プロテクトフィルム付偏光板及び液晶パネル |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2011164515A (ja) | 2011-08-25 |
| TW201137459A (en) | 2011-11-01 |
| JP5314618B2 (ja) | 2013-10-16 |
| KR20130004278A (ko) | 2013-01-09 |
| CN102763028A (zh) | 2012-10-31 |
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