JP2010151993A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stick an optical film to a liquid crystal element in highly accurate positional relation without generating bubbles in between the liquid crystal element and the optical film. <P>SOLUTION: An optical film 31 is arranged on a porous stage 7 composed of a porous material, having an optical film mounting surface formed on a flat surface and housed in an openable closed container 1, so that a surface opposite to an adhesive surface of the optical film 31 is opposed to the stage 7. The air in the stage 7 is exhausted to the outside of the container 1 to reduce pressure in the stage 7, and the optical film 31 is sucked to the surface of the stage 7. The liquid crystal element 30 is arranged on the optical film 31 sucked to the stage 7, so that an optical film sticking surface is opposed to the optical film 31, and in a state that the container 1 is sealed and pressure in the container 1 is reduced. The suction of the optical film 31 due to pressure reduction of the stage 7 is released, and the optical film 31 is stuck to the liquid crystal element 30 from the center part to the circumferential edge part of the optical film 31. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for attaching a liquid crystal element and an optical film.

In the manufacture of a liquid crystal display panel, a liquid crystal element and an optical film such as a polarizing plate are conventionally pasted by placing a liquid crystal element on a table and placing the optical film on the liquid crystal element from one end thereof by a roller. This is performed by a method of attaching to an element (see Patent Document 1).
JP-A-9-197395

  However, in the above-described conventional method, the optical film is displaced as the roller moves, and the optical film may be attached to the liquid crystal element at a wrong position. In some cases, bubbles may be generated between the liquid crystal display panel and the manufactured liquid crystal display panel.

  The present invention relates to a method for attaching a liquid crystal element and an optical film, wherein the liquid crystal element and the optical film can be attached in a highly accurate positional relationship and without causing bubbles between the liquid crystal element and the optical film. Is intended to provide.

The method for attaching a liquid crystal element and an optical film according to claim 1 of the present invention is a method of attaching a liquid crystal element and an optical film having an adhesive surface formed on an attachment surface for the liquid crystal element.
The optical film is made of a porous material and has an optical film mounting surface formed on a flat surface. The optical film is opposite to the adhesive surface on a breathable stage provided in an openable / closable sealed container. Placing the surface facing the stage, depressurizing the stage by exhausting the air in the stage to the outside of the container, and adsorbing the optical film on the stage;
A step of disposing a liquid crystal element on the optical film adsorbed on the stage with its optical film attachment surface facing the optical film;
The container is sealed, the inside of the container is depressurized, and a difference is generated between the air pressure in the container and the air pressure in the stage, and the optical film is moved from the central portion toward the peripheral portion by the pressure difference. A step of sequentially attaching to the liquid crystal element;
It is characterized by providing.

  According to a second aspect of the present invention, in the method for attaching the liquid crystal element and the optical film according to the first aspect, the optical film is adsorbed by depressurization in the stage in a state where the inside of the sealed container is depressurized. The optical film is released from the center to the periphery by giving a gradient that weakens the adsorption force of the optical film to the stage from the center to the periphery of the optical film. It is attracted to a liquid crystal element and is attached to the liquid crystal element.

  According to a third aspect of the present invention, in the method for attaching a liquid crystal element and an optical film according to the second aspect of the present invention, the air permeable stage has a vent hole disposed in the center thereof, and the vent hole is disposed inside the stage. By injecting air into the stage, the optical film adsorbing force to the stage is formed with a gradient that weakens from the central part of the optical film toward the periphery, centering on the vent hole.

  According to a fourth aspect of the present invention, in the method for attaching the liquid crystal element and the optical film according to the first aspect, the stage includes a central stage member corresponding to a central portion of a region where the optical film is placed. A plurality of frame-shaped stage members formed in a frame shape concentrically surrounding the central stage member, and are composed of a split-type stage disposed with an airtight state between adjacent stage members, The optical film is placed on the stage, the air in each stage member of the stage is exhausted, the optical film is adsorbed on the stage, and the inside of the sealed container is depressurized. The optical film is pressed against the liquid crystal element from the central part toward the peripheral part by adhering the air pressure of the central stage member in order from the central stage member. And wherein the kick it.

  According to a fifth aspect of the present invention, in the method for attaching the liquid crystal element and the optical film according to the first aspect, after the optical film is attached to the liquid crystal element, the optical film and the liquid crystal element are The method for adhering a liquid crystal element and an optical film according to any one of claims 1 to 4, wherein the liquid crystal element is further strongly affixed.

  A sixth aspect of the present invention is the method for attaching a liquid crystal element and an optical film according to the fifth aspect, wherein the roller hooking starts from a portion corresponding to a central portion of the optical film. .

  According to the attaching method of the present invention, the liquid crystal element and the optical film can be attached with a highly accurate positional relationship and without causing bubbles between the liquid crystal element and the optical film.

(First embodiment)
1 to 7 show a first embodiment of the present invention. FIG. 1 is a sectional view of a bonding apparatus for bonding a liquid crystal element and an optical film. FIG. 2 is a base of the bonding apparatus. FIG.

  As shown in FIGS. 1 and 2, the affixing device is composed of a base 2 and a container body 5 whose bottom surface is opened, and the open end of the container body 5 is brought into contact with the base 2. The container 1 includes an openable / closable sealed container 1 and a breathable stage 7 disposed in the container 1.

  The breathable stage 7 is made of a plate-like porous material, for example, a porous ceramic plate, and has an optical film mounting surface 8 formed on a flat surface. In this embodiment, the stage 7 is formed in a planar shape slightly smaller than the outer shape of the optical film 31 (see FIGS. 3 to 6) to be attached to the liquid crystal element 30, and the entire upper surface thereof is an optical film. The mounting surface 8 is used.

  And, the stage 7 has an optical film placement surface 8 on the upper surface of the stage 7 in a recessed portion 3 formed in a shape corresponding to the planar shape and thickness of the stage 7 on the upper surface of the base 2, and The base 2 is fitted in an airtight state with the upper surface around the recessed portion 3 of the base 2 being flush with each other.

  Further, a vent hole 4 for supplying and exhausting air into the air-permeable stage 7 is provided at the center of the base 2, and the container body 5 supplies and exhausts air into the container 1. A vent hole 6 is provided, and a stage decompression system 10 disposed outside the container 1 is connected to the vent hole 4 provided in the base 2, and the vent provided in the container body 5 is connected. A container decompression system 14 disposed outside the container 1 is connected to the pores 6.

  The stage decompression system 10 includes a vacuum ejector 11, an on-off valve (electromagnetic valve or manual valve) 12 connected to the exhaust side of the vacuum ejector 11 to turn the decompression system 10 on and off, and the stage 7. In order to maintain the degree of decompression inside, a check valve 13 provided in a connecting pipe between the vacuum ejector 11 and the vent hole 4, the container decompression system 14 includes a vacuum pump 15, And a vacuum gauge 16.

  3 to 6 are attachment process diagrams showing a method of attaching the liquid crystal element 30 and the optical film 31 by the attaching apparatus. In this embodiment, the liquid crystal element 30 and the optical film are processed in the following steps. 31 is pasted.

  Although the liquid crystal element 30 is simplified in FIGS. 3 to 6, the liquid crystal element 30 is sealed in a pair of transparent substrates joined via a frame-shaped sealing material and a gap between these substrates. Liquid crystal layers and transparent electrodes formed on the mutually facing inner surfaces of the pair of substrates and forming a plurality of pixels by the mutually facing regions.

  The liquid crystal element 30 is a TN type or STN type in which liquid crystal molecules are twisted, a vertical alignment type in which liquid crystal molecules are aligned substantially perpendicular to the substrate surface, and the liquid crystal molecules are aligned in one direction in the molecular major axis. Thus, either a non-twisted horizontal alignment type aligned substantially parallel to the substrate surface or a bend alignment type in which liquid crystal molecules bend-align, or a ferroelectric or antiferroelectric liquid crystal element may be used.

  Further, the liquid crystal element 30 is not limited to the one provided with electrodes for forming a plurality of pixels on the inner surfaces of a pair of substrates, but for forming a plurality of pixels on one inner surface of a pair of substrates. And a second electrode having a plurality of elongated electrode portions formed on the liquid crystal layer side of the first electrode and being insulated from the first electrode, and a horizontal electric field (substrate) between the electrodes. A lateral electric field control type that changes the alignment state of liquid crystal molecules by generating an electric field in a direction along the surface).

  The optical film 31 is, for example, a polarizing plate or a polarizing plate with a retardation plate formed by integrally laminating retardation plates, and an adhesive 33 (see FIG. 7) is applied.

  First, as shown in FIG. 3, the optical film 31 is placed on the breathable stage 7 provided on the inner surface of the base 2 of the sealed container 1, and the surface opposite to the adhesive surface 32 is placed on the stage 7. The optical film 31 is positioned so that the peripheral edge of the optical film 31 overlaps the inner surface of the base 2 around the stage 7, and the air in the air-permeable stage 7 is transferred to the pressure reducing system 10 for the stage. By evacuating to the outside of the container 1, the inside of the stage 7 is decompressed, and the optical film 31 is adsorbed on the stage 7.

  The optical film 31 is disposed so that the peripheral edge of the optical film 31 overlaps the inner surface of the base 2 and covers the stage 7, so that the base 2 is exhausted along with the exhaust of air in the stage 7. The amount of air sucked into the stage 7 from the upper surface side is small, so that the inside of the stage 7 can be reliably decompressed and the optical film 31 can be adsorbed onto the stage 7.

  The stage 7 is made of a porous material, and since the optical film mounting surface 8 is formed on a flat surface, the optical film 31 can be flattened without causing wrinkles or slaps. It can be adsorbed on the stage 7.

  Next, with the degree of decompression in the stage 7 kept constant, the liquid crystal element 30 is pasted on the optical film 31 adsorbed on the stage 7 as shown in FIG. The surface is opposed to the adhesive surface 32 of the optical film 31, and is positioned and arranged at a predetermined position. In FIG. 4, the liquid crystal element 30 is disposed on the optical film 31 so as not to adhere to the adhesive surface 32 without being pressed.

  Next, as shown in FIG. 5, the open end of the container body 5 is brought into contact with the base 2 to seal the container 1, and then the inside of the container 1 is decompressed by the container decompression system 14. By releasing the adsorption of the optical film 31 due to the reduced pressure in the stage 7 in a state where the inside of the container 1 is decompressed, a difference is generated between the atmospheric pressure in the container 1 and the atmospheric pressure in the stage 7; By providing the pressure difference with a gradient that weakens from the central part to the periphery of the optical film 31, the liquid crystal element 30 causes the optical film 31 to move from the central part toward the peripheral part due to the atmospheric pressure difference. Paste to.

  That is, the suction of the optical film 31 due to the decompression in the stage 7 is released in a state where the inside of the container 1 is decompressed, and the suction force of the optical film to the stage is changed from the central portion of the optical film to the periphery. By providing a gradient that weakens toward the periphery, the pressure difference between the inside of the container 1 and the stage 7 is imparted with a gradient that weakens from the center of the optical film 31 toward the periphery. The optical film 31 is attached to the liquid crystal element 30 from the central part toward the peripheral part.

  In this embodiment, air is caused to flow into the stage 7 from the vent hole 4 arranged at the center of the stage 7, so that the suction force of the optical film 31 on the stage 7 is centered on the vent hole 4. Thus, a gradient is formed that becomes weaker from the central portion of the optical film 31 toward the periphery.

  FIG. 7 schematically shows how the optical film 31 is attracted to the liquid crystal element 30 in this step. As shown in FIG. 7A, the liquid crystal element 30 is placed on the optical film 31 and the optical film. In a state where the adhesive film 32 is stacked so as not to adhere to the adhesive surface 32, the inside of the container 1 is decompressed, the decompression by the stage 7 is released, and the optical film is placed between the inside of the container 1 and the inside of the stage 7. When a pressure difference having a gradient that weakens from the central part of the 31 toward the periphery is generated, the optical film 31 is moved from the central part toward the peripheral part as shown in FIG. Then, the air between the liquid crystal elements 30 (including the air in the adhesive 33) is pushed out to the surroundings and finally attracted to the liquid crystal elements 30, and finally, as shown in FIG. Whole Serial in close contact with the liquid crystal element 30, affixed to the liquid crystal element 30 through the adhesive surface 32.

  Therefore, the liquid crystal element 30 and the optical film 31 can be attached with a highly accurate positional relationship and without causing bubbles between the liquid crystal element 30 and the optical film 31.

  In this embodiment, the liquid crystal element 30 is arranged on the optical film 31 adsorbed on the stage 7 so as not to adhere to the adhesive surface 32 of the optical film 31. May be arranged on the optical film 31 with a slight gap between the optical film 31 and in this case, the optical film 31 is placed in the center by the reduced pressure in the container 1. It can affix on the said liquid crystal element 30 toward a peripheral part.

  In this embodiment, the optical film 31 is preliminarily provided with a warp ridge that swells in the direction of the adhesive surface 32 from its peripheral edge toward the center, that is, as shown in FIG. You may keep it.

  Even if the optical film 31 has such warp wrinkles, the optical film 31 can be adsorbed onto the stage 7 by correcting the warp by reducing the pressure in the stage 7.

  Then, when the display element 30 is disposed on the optical film 31 and the pressure in the stage 7 is released after the pressure in the container 1 is reduced, the pressure difference between the container 1 and the stage 7 and the optical Since the optical film 31 sticks to the liquid crystal element 30 from the central portion toward the peripheral edge due to the force of the film 31 to return to the original warped state, the optical film 31 with the warp is surely centered. It can affix on the liquid crystal element 30 toward a peripheral part from a part.

  Then, after the optical film 31 is attached to the liquid crystal element 30, the inside of the container 1 is returned to atmospheric pressure, the container body 5 is withdrawn from the base 2, and then the optical film 31 is moved by a roller. And the liquid crystal element 30 are adhered more strongly.

  In this embodiment, as shown in FIG. 6, the roller hook is a roller on one end of the liquid crystal element 30 in a state in which the bonded body of the liquid crystal element 30 and the optical film 31 is adsorbed on the stage 7. 25, and the roller 25 is moved to the other end of the liquid crystal element 30.

  Therefore, the liquid crystal element 30 and the optical film 31 can be more closely adhered to each other by the roller application, and the bonding strength can be further increased. In addition, when the optical film 31 is attached to the liquid crystal element 30 due to a pressure difference between the container 1 and the stage 7, air remains between the liquid crystal element 30 and the optical film 31. However, the residual air can be removed by the roller hooking, and the liquid crystal element 30 and the optical film 31 can be attached without causing air bubbles more reliably between them.

  In addition, when performing the said roller hanging, it is preferable to carry out in the state which adsorb | sucked to the said stage 7 the liquid crystal element 30 and the optical film 31 which were stuck together. Thereafter, the inside of the stage 7 is returned to atmospheric pressure, and the bonded body of the liquid crystal element 30 and the optical film 31 is taken out.

  The roller hooking may start from a portion corresponding to the central portion of the optical film 31. FIG. 8 shows a roller application method starting from a portion corresponding to the central portion of the optical film 31. In this example, first, a roller is placed on the central portion of the liquid crystal element 30 as shown in FIG. 25, the roller 25 is moved to one end of the liquid crystal element 30, and the roller 25 is further moved to the other end of the liquid crystal element 30 as shown in FIG.

  As described above, when the roller hooking is started from a portion corresponding to the central portion of the optical film 31, the liquid crystal element 30 and the optical film are not left between the liquid crystal element 30 and the optical film 31. 31 can be securely attached.

  In the above-described embodiment, the roller hanging is performed by adhering the bonded body of the liquid crystal element 30 and the optical film 31 onto the stage 7, but this roller hanging is performed by attaching the bonded body to the stage. 7 may be taken out on the other plate, and in that case, the roller hanging may be carried out from the optical film 31 side.

(Second Embodiment)
9 to 19 show a second embodiment of the present invention. In this embodiment, components corresponding to those of the first embodiment are given the same reference numerals in the drawings, and descriptions of the same components are omitted.

  FIG. 9 is a cross-sectional view of a bonding apparatus for bonding a liquid crystal element and an optical film, FIG. 10 is a plan view of a base of the bonding apparatus, and the bonding apparatus of this embodiment is a breathable stage. The central stage member 19 corresponding to the central portion of the area where the optical film 31 is placed, and a plurality of frame-shaped stage members 20 and 21 formed in a frame shape concentrically surrounding the central stage member 19. , 22, 23 are provided with a split stage 17 disposed between the adjacent stage members 19, 20, 20, 21, 21, 22, and 22, 23 in an airtight state. .

  The central stage member 19 and the plurality of frame-like stage members 20, 21, 22, and 23 that constitute the split stage 17 are each made of a porous material such as porous ceramic, and the base 2 of the sealed container 1. Each of the stage members 19, 20, 21, 22, 23 is formed in a plurality of recessed portions 3 a formed on the upper surface of the stage member 19, 20, 21, 22, 23 in a shape corresponding to the planar shape and thickness respectively. The upper surface of the base plate 2 and the upper surface of the partition wall 3b between the adjacent recessed portions 3a, 3a of the base 2 and the upper surface around the recessed portion forming region are fitted in an airtight state, and these stage members 19, The upper surface of 20, 21, 22, 23 forms an optical film mounting surface 18 which is a flat surface, and between adjacent stage members 19, 20, 20, 21, 21, and 22, 23 It is arranged to be blocked in an airtight state by a partition wall 3b between the adjacent recesses 3a, 3a.

  Further, a portion corresponding to the plurality of recessed portions 3a, 3a of the base 2 is connected to the stage member 19, 20, 21, 21, 22, 23 of the split type stage 17 for supplying and exhausting air. The air holes 4a are respectively provided, and the stage pressure reducing system 10a disposed outside the container 1 is connected to the air holes 4a.

  The stage decompression system 10a is interposed between a vacuum ejector 11, an on / off on-off valve 12, and a plurality of branch pipes branched from the vacuum ejector 11 and connected to the vent holes 4 and 4, respectively. A plurality of check valves 13a, 13b, 13c, 13d, and 13e are provided.

  Further, on the base 2 of the container 1, the liquid crystal element 30 is placed on the optical film 31 adsorbed by the split-type stage 17 so as to correspond to both side edges of the split-type stage 17. A liquid crystal element support 24 is formed to support the substrate 31 with a slight gap of about 1 to 2 mm.

  FIG. 11 to FIG. 19 are attachment process diagrams showing a method of attaching the liquid crystal element 30 and the optical film 31 by the attaching apparatus. In this embodiment, the liquid crystal element 30 and the optical film are processed in the following steps. 31 is pasted.

  First, as shown in FIG. 11, the optical film 31 is placed on the split stage 17 provided on the inner surface of the base 2 of the sealed container 1, and the surface opposite to the adhesive surface 32 is placed on the stage 17. The optical film 31 is positioned so that the peripheral edge of the optical film 31 overlaps the inner surface of the base 2 around the split stage 17, and the stage members 19, 20, 21 of the split stage 17 are arranged. , 22, 23 are exhausted out of the container by the stage decompression system 10 a, so that the inside of the stage members 19, 20, 21, 22, 23 is decompressed and placed on the split stage 17. The optical film 31 is adsorbed.

  Next, the decompression by the stage decompression system 10a is stopped, and the decompression degree in each of the stage members 19, 20, 21, 22, 23 of the split stage 17 is kept constant as shown in FIG. The liquid crystal element 30 is positioned on the optical film 31 adsorbed on the split stage 17 at a predetermined position with the optical film attachment surface facing the adhesive surface 32 of the optical film 31. The both side edges of the liquid crystal element 30 are supported by the liquid crystal element support 24 on the base 2, and a gap is provided between the liquid crystal element 30 and the optical film 31.

  Next, as shown in FIG. 13, the container 1 is sealed by bringing the open end of the container body 5 into contact with the base 2, and the inside of the container 1 is sealed by the container decompression system 14. The pressure is reduced to the same degree as the pressure in each of the 17 stage members 19, 20, 21, 22, and 23, and thereafter, as shown in FIGS. The air pressure between the liquid crystal element 30 and the optical film 31 is increased from the central part toward the peripheral part by increasing the air pressure in the order from the central stage member 19 (including the air in the adhesive 33). The liquid crystal element 30 is pressed against the liquid crystal element while being pushed out to the periphery, and is attached to the liquid crystal element.

  Therefore, the liquid crystal element 30 and the optical film 31 can be attached with a highly accurate positional relationship and without causing bubbles between the liquid crystal element 30 and the optical film 31.

  In this embodiment, the liquid crystal element 30 is disposed on the optical film 31 adsorbed on the split stage 17 with a gap between the liquid crystal element 30 and the liquid crystal element 30. May be placed on the optical film 31 so as not to adhere to the adhesive surface 32 of the optical film 31 without applying a pressing force. The optical film 31 can be attached to the liquid crystal element 30 from the central part toward the peripheral part by increasing the air pressure in each of the stage members 19, 20, 21, 22, 23 in order from the central stage member 19. it can.

  After the optical film 31 is attached to the liquid crystal element 30, the inside of the container 1 is returned to atmospheric pressure, the container body 5 is withdrawn from the base 2, and the inside of the stage 7 is then brought to atmospheric pressure. Then, the bonded body of the liquid crystal element 30 and the optical film 31 is taken out, and then the optical film 31 and the liquid crystal element 30 are bonded more strongly by roller hanging.

  In this embodiment, the roller hook is placed on a flat plate 26 as shown in FIGS. 17 to 19, with the liquid crystal element 30 and the optical film 31 attached, for example, with the optical film 31 facing up. First, as shown in FIG. 17, a roller 27 is pressed onto the center of the optical film 31, and the roller 27 is moved to one end of the optical film 31 as shown in FIG. As shown in FIG. 19, the optical film 31 is moved to the other end.

  In addition, in the said Example, although the said roller hanging is started from the part corresponding to the center part of the optical film 31, this roller hanging may be performed toward the other end from the said optical film 31. Further, the roller application may be performed from the liquid crystal element 30 side.

Sectional drawing of the sticking apparatus for sticking the liquid crystal element and optical film which show 1st Example of this invention. The top view of the base of the said sticking apparatus. The figure which shows the 1st process of the sticking method of a 1st Example. The figure which shows the 2nd process of the sticking method of a 1st Example. The figure which shows the 3rd process of the sticking method of a 1st Example. The figure which shows the 4th process of the sticking method of a 1st Example. The figure which showed typically a mode that the optical film in the said 3rd process was attracted | sucked to a liquid crystal element. The figure which shows the other roller hanging method in the sticking method of a 1st Example. Sectional drawing of the bonding apparatus for bonding the liquid crystal element and optical film which show the 2nd Example of this invention. The top view of the base of the said sticking apparatus. The figure which shows the 1st process of the sticking method of a 2nd Example. The figure which shows the 2nd process of the sticking method of a 2nd Example. The figure which shows the 3rd process of the sticking method of a 2nd Example. The figure which shows the 4th process of the bonding method of a 2nd Example. The figure which shows the 5th process of the bonding method of a 2nd Example. The figure which shows the 6th process of the sticking method of a 2nd Example. The figure which shows the 7th process of the sticking method of a 2nd Example. The figure which shows the 8th process of the sticking method of a 2nd Example. The figure which shows the 9th process of the sticking method of a 2nd Example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Sealed container, 2 ... Base, 5 ... Container body, 7 ... Stage, 8 ... Optical film mounting surface, 17 ... Split type stage, 18 ... Optical film mounting surface, 19 ... Central stage member, 20, 21, 22, 23, a frame-shaped stage member, 24, a liquid crystal element support, 25, 27, rollers, 30, a liquid crystal element, 31, an optical film, 32, an adhesive surface.

Claims (6)

In the bonding method between the liquid crystal element and the optical film having an adhesive surface formed on the bonding surface for the liquid crystal element,
The optical film is made of a porous material and has an optical film mounting surface formed on a flat surface. The optical film is opposite to the adhesive surface on a breathable stage provided in an openable / closable sealed container. Placing the surface facing the stage, depressurizing the stage by exhausting the air in the stage to the outside of the container, and adsorbing the optical film on the stage;
A step of disposing a liquid crystal element on the optical film adsorbed on the stage with its optical film attachment surface facing the optical film;
The container is sealed, the inside of the container is depressurized, and a difference is generated between the air pressure in the container and the air pressure in the stage, and the optical film is moved from the central portion toward the peripheral portion by the pressure difference. Attaching to the liquid crystal element;
A method for attaching a liquid crystal element and an optical film, comprising:   The suction of the optical film due to the decompression in the stage is released in a state where the inside of the sealed container is decompressed, and the suction force of the optical film to the stage has a gradient that becomes weaker from the center to the periphery of the optical film. 2. The method for attaching a liquid crystal element and an optical film according to claim 1, wherein the optical film is attached to the liquid crystal element by being attracted to the liquid crystal element from a central part toward a peripheral part. .   The breathable stage has a vent hole at the center thereof, and air is allowed to flow into the stage from the vent hole, so that the optical film attracts the stage to the optical film with the vent hole at the center. The method for attaching a liquid crystal element and an optical film according to claim 2, wherein a gradient that weakens from the center to the periphery of the film is formed.   The stage is adjacent to a central stage member corresponding to the central portion of the region where the optical film is placed, and a plurality of frame-shaped stage members formed in a frame shape concentrically surrounding the central stage member. It consists of a split-type stage arranged with the stage members shut off in an airtight state, the optical film is placed on the stage, and the air in each stage member of the stage is exhausted onto the stage. After adsorbing the optical film and depressurizing the inside of the sealed container, the pressure in each stage member is increased in order from the central stage member, whereby the optical film is liquid crystal from the central part toward the peripheral part. The method for attaching a liquid crystal element and an optical film according to claim 1, wherein the liquid crystal element is attached to the liquid crystal element by being pressed against the element.   The optical film and the optical film according to any one of claims 1 to 4, wherein the optical film and the liquid crystal element are further strongly attached by roller hanging after the optical film is attached to the liquid crystal element. Attaching method.   6. The method for attaching a liquid crystal element and an optical film according to claim 5, wherein the roller hooking is started from a portion corresponding to the central portion of the optical film.

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