JP2009025567A - Optical film affixing method, optical film affixing device, and display panel manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure the attaching quality of an optical film and to generate bubbles or the like by giving the attaching position accuracy of both polarizing plates even when the sizes of the optical films attached to both surfaces of the display panel are different from each other. Paste the optical film on both sides of the display panel accurately.
When an optical film is applied to both surfaces of a display panel at the same time, the first and second application rollers, the first and second application starts are set with the insides of the first and second optical films as the start position. When pasting the vicinity of the end first while moving the end holding means, and then pasting the rest of the optical film, stop the first and second pasting rollers and move the display panel. And paste. Accordingly, optical films of different sizes can be attached simultaneously to both surfaces of the display panel while ensuring the optical film attachment quality.
[Selection] Figure 1

Description

  The present invention relates to an optical film affixing method, an optical film affixing device for affixing an optical film made of a polarizing plate, a retardation plate, etc. to a display panel such as a liquid crystal panel, and a method for manufacturing a display panel using these. In particular, the present invention relates to an optical film attaching method, an optical film attaching apparatus, and a display panel manufacturing method using these, which can ensure the attaching quality of the optical film.

  In the manufacturing process of a liquid crystal display device, a liquid crystal panel is formed by sealing liquid crystal between a TFT (Thin Film Transistor) substrate and a color filter substrate, and then a polarizing plate is attached to the front and back surfaces of the liquid crystal panel. . Furthermore, a phase difference plate for visual compensation may be attached. The pasting operation of the optical film composed of such a polarizing plate and a retardation plate is performed by a pasting device.

Usually, an adhesive is applied to the optical film in advance, and a protective film is put on the adhesive. The pasting device is provided with a first work position for peeling the protective film from the optical film and a second work position for pasting the optical film to the display panel. While being held by holding means such as a suction table, first, the protective film is peeled off from the optical film at the first work position, and then the optical film is moved from the first work position to the second work position where the attachment is performed. The work of moving and attaching the optical film to the display panel is performed at the second work position. As an apparatus or method for attaching such an optical film to a liquid crystal panel, for example, the one described in Patent Document 1 is known.
JP 2004-144913 A

  The polarizing plate pasting apparatus described in Patent Document 1 is a liquid crystal cell substrate in a state in which the liquid crystal cell substrate is erected in order to suppress the expansion of the footprint of the polarizing plate pasting apparatus accompanying the enlargement of the color liquid crystal display. By simultaneously attaching a polarizing plate to the first main surface (CF surface) and the second main surface (TFT surface) of the substrate, the expansion of the footprint in the direction (width direction) orthogonal to the transport direction of the liquid crystal cell substrate is suppressed. I am doing so.

  The polarizing plate attaching apparatus described in Patent Document 1 is effective when the size of the polarizing plate attached to the liquid crystal cell substrate is the same on the first main surface and the second main surface. In contrast, when it is necessary to position the pasting position, etc., the pasting start positions of the two polarizing plates are different from each other. Furthermore, it is very difficult to obtain the accuracy of the pasting position, and there are problems such as the generation of bubbles on the pasting surface. In the polarizing plate pasting apparatus described in Patent Document 1, when the sticking start positions of the two polarizing plates are different from each other, the polarizing plate is pasted on the first main surface of the liquid crystal cell substrate, and then the second main surface. It only suggests that a polarizing plate should be attached, and does not mention any specific solution.

This invention is made | formed in view of the above-mentioned point, and provides the manufacturing method of the optical film sticking method, the optical film sticking apparatus, and display panel which can ensure the sticking quality of an optical film. For the purpose.
In addition, the present invention has been made in view of the above points, and even when the sizes of the optical films attached to both surfaces of the display panel are different from each other, the position accuracy of both polarizing plates is obtained, and bubbles are produced. It is an object of the present invention to provide an optical film attaching method, an optical film attaching apparatus, and a display panel manufacturing method capable of accurately attaching an optical film to both surfaces of a display panel without causing the above.

The first feature of the optical film affixing method of the present invention is that the optical film and the display panel are placed on the roller while pressing the optical film against the display panel using roller means longer than the width direction of the optical film. An optical film affixing method for affixing the optical film to the display panel by moving the optical film relative to the means, wherein the spaced apart surface regions near both ends of the optical film are first and second The optical film is adsorbed to the first and second adsorption base means of the optical film between the main surface of the display panel and the roller means in a state of being adsorbed and held by the adsorption base means. The position of the optical film is moved to a position where the roller means is opposed to each other, and the first and second absorptions of the optical film are moved. The roller means is moved relatively to the end of the first suction base means while being pressed against the display panel, with the portion not sucked and held by the base means as a reference position. By sticking a part of the optical film to the display panel, the roller means is returned to the reference position, and the roller means is pressed against the display panel while being sucked and held by the second suction base means. The remaining portion of the optical film is attached to the display panel by relatively moving toward the end on the other side.
Conventionally, after peeling off the protective film, while holding the optical film with the suction base means, the end of the optical film is positioned at the attaching position of the display panel, and the end of the optical film is used as the starting end While the optical film is pressed against the display panel using the roller means, the optical film, the display panel, and the roller means are relatively moved to attach the optical film to the display panel. In contrast, in the present invention, the separated surface regions in the vicinity of both end portions of the optical film are suction-held using the first and second suction base means that are separately controlled in movement. There is a portion between the first and second suction base means that is not held by the suction base means. Therefore, the optical film and the display panel and the roller means are relatively moved toward one end of the optical film while pressing the optical film against the display panel using the roller means with this point as a reference position, and the optical film Adhere part of the film to the display panel. Thereafter, the roller means is returned to the reference position, and the optical film and the display panel and the roller means are moved relatively toward the other end of the optical film while pressing the roller means against the display panel. Stick the rest of the optical film on the panel. That is, according to the present invention, the optical film is attached to the display panel by moving the roller means separately toward both ends of the optical film with the inside of the optical film being the starting position. Thereby, the affixing quality of the optical film can be ensured. In addition, since an optical film is a rectangle normally, the edge part has two places of a horizontal direction and a perpendicular direction. Normally, it is efficient to carry out at the edge along the horizontal direction, which is the direction of travel of the display panel, but the present invention similarly applies the pasting quality to any direction. It is possible to secure.

According to a second feature of the optical film attaching method of the present invention, in the optical film attaching method according to the first feature, when a part of the optical film is attached to the display panel, the display panel and When the movement of the optical film is stopped, the roller means and the first suction base means are synchronously moved to move the roller means when the remaining portion of the optical film is attached to the display panel. The display panel is moved in a state where the display is stopped.
This is a concrete method of relative movement at the time of application in the optical film application method described in the first feature, and the side on which the roller means is adsorbed and held by the first adsorbing base means. In the case of moving toward the end, the roller means and the first suction base means are synchronously moved while the movement of the display panel and the optical film is stopped, and conversely, the second suction from the reference position is performed. In the case of moving toward the end on the side attracted and held by the base means, the display panel is moved while the movement of the roller means is stopped.

The third feature of the optical film attaching method of the present invention is that the first and second main surface sides of the display panel are first used from the first and second main surface sides using the first and second roller means longer than the width direction of the optical film. And pressing the first and second optical films and the display panel against the first and second roller means while pressing the second optical film against the first and second main surfaces of the display panel. An optical film attaching method for attaching the first and second optical films to the display panel substantially simultaneously by moving them relatively, wherein the surface regions are spaced apart in the vicinity of both ends of the first optical film. Is held between the first and second suction base means, and the first optical film is placed between the first main surface of the display panel and the first roller means, First A portion of the optical film that is not sucked and held by the first and second suction base means and the first roller means are moved to a position facing each other, and in the vicinity of both ends of the second optical film. The second optical film is placed between the second main surface of the display panel and the second roller means in a state of being held by suction by the third and fourth suction base means so as to include the surface. The second optical film is moved to a position where the second roller means and the portion not sucked and held by the third and fourth suction base means are opposed to each other, and The portion of the optical film not sucked and held by the first and second suction base means is used as a first reference position to press the first roller means against the display panel and the second optical film. The first and third suction base means while pressing the second roller means against the display panel using the portion not held by the third and fourth suction base means as a second reference position. A portion of the first and second optical films is attached to the display panel at the same time by relatively moving toward the end of the side held by suction, and the first and second roller means Is returned to the first and second reference positions, and the first and second roller means are pressed against the display panel, and the end on the side held by the second and fourth suction base means The remaining portions of the first and second optical films are attached to the display panel by relatively moving toward each other.
This is a configuration in which the optical film attaching method described in the first feature is attached to the first main surface and the second main surface of the display panel almost simultaneously. is there. In this way, by attaching the optical film sticking start end first with the display panel stopped, and then sticking the remaining optical film while moving the display panel, the sizes of the optical film are mutually increased. Different optical films can be simultaneously attached to both sides of the display panel.

According to a fourth feature of the optical film attaching method of the present invention, in the optical film attaching method according to the third feature, when a part of the first and second optical films is attached to the display panel. The first and second roller means and the first and third suction base means are synchronously moved in a state where movement of the display panel and the first and second optical films is stopped, When pasting the remaining portions of the first and second optical films on the display panel, the display panel is moved while the movement of the first and second roller means is stopped. .
This is a concrete method of relative movement at the time of application in the optical film application method described in the third feature, and the first and second roller means are connected to the first and third rollers. In the case of moving toward the end of the suction-supported side of the suction-base means, the first and second roller means are stopped with the movement of the display panel and the first and second optical films being stopped. When the first and third suction base means are moved synchronously, and conversely moved from the reference position toward the end portions held by suction by the second and fourth suction base means, This is done by moving the display panel while the movement of the second roller means is stopped.

The first feature of the optical film affixing device of the present invention is that the display panel moving means for moving the display panel and the separated surface areas in the vicinity of both ends of the optical film are sucked and held, respectively. The first and second suction base means for moving the first main surface and the surface of the optical film to face each other, and a roller longer than the width direction of the optical film, Roller means for adhering the optical film to the display panel by relatively moving while being pressed against the display panel, and the optical film being sucked and held by the first and second suction base means, respectively. , Between the main surface of the display panel and the roller means, adsorbed to the first and second adsorption base means of the optical film The optical film is moved to a position where the portion that is not held and the roller means face each other, and the portion that is not sucked and held by the first and second suction base means of the optical film is a reference position. As described above, by pressing the roller means against the display panel while moving the roller means toward the end portion of the first suction base means that is sucked and held, A part is pasted, the roller means is returned to the reference position, and the roller means is pressed against the display panel while moving relatively toward the end portion of the second suction base means held by suction. And a control means for attaching the remaining portion of the optical film to the display panel.
This relates to an invention of an apparatus for realizing the optical film attaching method described in the first feature.

According to a second feature of the optical film sticking apparatus of the present invention, in the optical film sticking apparatus according to the first feature, when the control means sticks a part of the optical film to the display panel, In a state where the movement of the display panel and the optical film is stopped, the roller means and the first suction base means are synchronously moved, and when the remaining portion of the optical film is attached to the display panel, The display panel is moved while the movement of the roller means is stopped.
This relates to an invention of an apparatus for realizing the optical film attaching method described in the second feature.

The third feature of the optical film pasting apparatus of the present invention is that the display panel moving means for moving the display panel and the separated surface areas in the vicinity of both end portions of the first optical film are sucked and held, respectively. The first and second suction base means for moving the first main surface of the panel to the position where the surface of the first optical film is opposed to each other, and the separation in the vicinity of both ends of the second optical film A third and a fourth suction base means for holding each of the surface areas by suction, and moving the second main surface of the display panel to a position where the second main surface and the surface of the second optical film face each other; The first optical film is moved relatively while pressing the first optical film against the first main surface of the display panel using a roller longer than the width direction of the first optical film. The first optical film is attached to the first main surface of the display panel, and the second optical film is attached to the display panel using a roller longer than the width direction of the second optical film. Second roller means for affixing the second optical film to the second main surface of the display panel by relatively moving while pressing against the second main surface of the first optical film; and The first optical film, the first main surface of the display panel, and the first roller means in a state where the separated surface regions near both ends are sucked and held by the first and second suction base means, respectively. The first optical film is moved to a position where the first roller means and the portion not held by the first and second suction base means are opposed to each other. Both The second optical film is held on the second main surface of the display panel in a state in which the separated surface regions in the vicinity of both ends of the second optical film are sucked and held by the third and fourth suction base means, respectively. And the second roller means, the portion of the second optical film that is not sucked and held by the third and fourth suction base means and the second roller means face each other. The first roller means is moved to the display panel as a first reference position where the first optical film is not sucked and held by the first and second suction base means. While pressing, the second roller means is pressed against the display panel with the second reference position of the second optical film that is not sucked and held by the third and fourth suction base means. A part of the first and second optical films is attached to the display panel almost simultaneously by moving relatively toward the end portion of the first and third suction base means held by suction. The first and second roller means are returned to the first and second reference positions, and the second and fourth suction means are pressed while pressing the first and second roller means against the display panel. And a control means for attaching the remaining portions of the first and second optical films to the display panel by relatively moving toward the end on the side held by the base means. is there.
This relates to an invention of an apparatus for realizing the optical film attaching method described in the third feature.

According to a fourth feature of the optical film sticking apparatus of the present invention, in the optical film sticking apparatus according to the third feature, the control means has the display panel provided with the first and second optical films. When pasting a part, the first and second roller means and the first and third suction base means are moved with the movement of the display panel and the first and second optical films stopped. When the remaining portions of the first and second optical films are attached to the display panel in a synchronized manner, the display panel is moved with the movement of the first and second roller means stopped. There is to move.
This relates to an invention of an apparatus for realizing the optical film attaching method according to the fourth feature.

A feature of the display panel manufacturing method of the present invention is any one of the optical film pasting method according to any one of the first feature to the fourth feature, or the first feature to the fourth feature. The optical film is applied to the display panel using the optical film application device described in the above.
This relates to a method for manufacturing a display panel in which an optical film is attached to a display panel using either the optical film attaching method or the optical film attaching apparatus.

According to the present invention, there is an effect that the affixing quality of the optical film can be ensured.
ADVANTAGE OF THE INVENTION According to this invention, even when the magnitude | size of the optical film affixed on both surfaces of a display panel differs from each other, there exists an effect that an optical film can be affixed on both surfaces of a display panel simultaneously with sufficient precision.

  FIG. 1 is a diagram showing a schematic configuration of a polarizing plate attaching line of a polarizing plate attaching operation of a polarizing plate attaching apparatus according to an embodiment of the present invention, and a liquid crystal panel conveyed in an upright state. It is the figure which looked at the sticking operation state in the case of sticking a polarizing plate from the upper surface side. The polarizing plate pasting apparatus according to this embodiment is configured to be movable from the left direction to the right direction in the drawing in a state where the liquid crystal panel 1 is erected. Since the details of the mechanism of the movement in the standing state are described in Patent Document 1, the description thereof is omitted here.

  In this embodiment, the polarizing plate attachment line attaches the polarizing plate 31 to the first main surface 1a side of the liquid crystal panel 1 when the liquid crystal panel 1 moves from the left direction to the right direction in FIG. A first polarizing plate attaching unit for performing the attaching operation, and a second polarizing plate attaching unit for performing the operation of attaching the polarizing plate 32 to the second main surface 1b side of the liquid crystal panel 1. The first polarizing plate pasting unit includes a first suction base 11, a first pasting start end suction base 12, and a first polarizing plate pasting roller 13. The second polarizing plate pasting unit includes a second suction base 21, a second pasting start end suction base 22, and a second polarizing plate pasting roller 23. An alignment device for supplying the liquid crystal panel 1 and a cleaning roller are provided on the front side of the polarizing plate pasting line, but these are not shown here. In addition, polarized light that supplies polarizing plates 31 and 32 to the first stage of the first suction base 11, the first sticking start end suction base 12, the second sticking base end 21, and the second sticking start end sticking base 22 that absorbs the polarizing plate. Although a plate stocker, a transfer head, a positioning stage, a peeling unit, a cleaning roller, a protective film stocker, and the like are provided, these are also omitted from the illustration.

  The first adsorbing base 11 and the first sticking start end adsorbing base 12 raise the polarizing plate 31 by adsorbing and holding the polarizing plate 31 placed on the polarizing plate stocker, and in this state the first polarizing plate The polarizing plate 31 can be supplied to the sticking roller 13. The second adsorption base 21 and the second sticking start edge adsorption base 22 raise the polarizing plate 32 by adsorbing and holding the polarizing plate 32 placed on the polarizing plate stocker, and in this state the second polarizing plate The polarizing plate 32 can be supplied to the pasting roller 23. The first and second suction bases 11 and 21 are moved in the X and Y directions, moved in the Z direction, or in the direction of the arrow 41 or 42 in FIG. It is configured to be able to rotate or freely control in a three-dimensional space. The first and second sticking start end suction bases 12 and 22 are moved in the X and Y directions or moved in the Z direction by a driving means (not shown), or the arrows 45a or 45b in FIG. It is configured to be able to move in the direction of and to freely control in the three-dimensional space. The first suction base 11, the first sticking start end suction base 12, the second sticking base 21, and the second sticking start end suction base 22 may move in synchronization with each other, or may move separately. is there.

  The first and second polarizing plate pasting rollers 13 and 23 have a length equal to or greater than the width of the polarizing plates 31 and 32 in the width direction orthogonal to the conveying direction of the polarizing plates 31 and 32, respectively. It is configured to be controlled by a driving means (not shown) so as to be close to each other or away from each other and further to move in the direction of an arrow 45a or 45b in FIG. The first suction base 11 and the first sticking start end suction base 12 suck and hold the polarizing plate 31 as shown in FIG. 1A and suck and hold the first sticking base 11 and the first sticking start end suction base 12. The polarizing plate 31 is moved while adjusting the relative positional relationship so that the polarizing plate 31 at a position where it is not positioned is positioned between the first polarizing plate pasting roller 13 and the liquid crystal panel 1. Similarly, the second suction base 21 and the second sticking start end suction base 22 also suck and hold the polarizing plate 32 as shown in FIG. 1A, and the second sticking base 21 and the second sticking start end suction base 22. The polarizing plate 32 at a location not attracted and held by the liquid crystal is moved while adjusting the relative positional relationship so that the polarizing plate 32 is positioned between the second polarizing plate pasting roller 23 and the liquid crystal panel 1. The first polarizing plate pasting roller 13 and the second polarizing plate pasting roller 23 are arranged facing each other, and polarizing plates 31 and 32 are provided on the first main surface 1a and the second main surface 1b of the liquid crystal panel 1, respectively. At the time of pasting, the pasting is performed by holding each other by the pressing force of each other. As shown in FIG. 1 (a), a first suction base 11, a first sticking start end suction base 12, a second suction base 21, and a first suction base 11, between the first and second polarizing plate pasting rollers 13, 23, are provided. 2 The polarizing plates 31 and 32 are located at positions where they are not sucked and held by the sticking start end suction base 22. In this state, the first and second polarizing plate pasting rollers 13, 23, the first suction base 11, the first pasting start end suction base 12, the second suction base 21, and the second pasting start end suction base 22 are: The operation of attaching the polarizing plates 31 and 32 to the liquid crystal panel 1 in cooperation with each other is performed. Details of the pasting operation will be described later.

  Although not shown, a first inspection camera is provided to detect the relative positional relationship between the liquid crystal panel 1 and the polarizing plates 31 and 32 so that the pasting deviation amount is within an allowable range. The second suction bases 11 and 21 and the first and second sticking start edge suction bases 12 and 22 may be aligned. Further, using the inspection camera, it is detected whether or not the liquid crystal panel 1 has been transported to a position where the polarizing plate can be pasted. A sticking process start signal may be output to the bases 11 and 21 and the first and second sticking start end suction bases 12 and 22.

  FIG. 1 and FIG. 2 are diagrams showing an example of a process in which a polarizing plate attaching apparatus according to this embodiment attaches a polarizing plate to a liquid crystal panel. 1A to 1C show a first attaching step for attaching a polarizing plate starting end portion to a first main surface (CF surface) and a second main surface (TFT surface) of a liquid crystal panel. FIG. 2A to 2C show the remaining polarizing plates in addition to the portions attached in the first attaching step to the first main surface (CF surface) and the second main surface (TFT surface) of the liquid crystal panel. It is a figure which shows the 2nd sticking process which sticks.

  In FIG. 1A, the liquid crystal panel 1 has been previously subjected to alignment processing, cleaning processing, and the like, and from the left direction to the right direction (the direction of the arrow 45) in the state where the liquid crystal panel 1 is erected from the previous step. Moved. On the other hand, the polarizing plate 31 is peeled off by a protective film peeling means (not shown), and further cleaned by a polarizing plate cleaning roller (not shown) to obtain the first suction base 11 and the first sticking start edge suction base 12. Is adsorbed and retained. The polarizing plate 31 sucked and held by the first suction base 11 and the first sticking start end suction base 12 is between the first polarizing plate pasting roller 13 and the liquid crystal panel 1, and is the first polarizing plate 31. The portion not sucked and held by the suction base 11 and the first sticking start end suction base 12 and the first polarizing plate pasting roller 13 are moved to positions facing each other. Similarly, the polarizing plate 32 is peeled off by a protective film peeling means (not shown), and further cleaned by a polarizing plate cleaning roller (not shown) to obtain the second suction base 21 and the second sticking start edge suction base 22. Is adsorbed and retained. The polarizing plate 32 sucked and held by the second suction base 21 and the second sticking start end suction base 22 is between the second polarizing plate pasting roller 23 and the liquid crystal panel 1, and the second polarizing plate 32. The portion that is not sucked and held by the suction base 21 and the second sticking start end suction base 22 and the second polarizing plate sticking roller 23 are moved to a position facing each other.

  In FIG. 1 (B), the tip of the polarizing plate 31 adsorbed and held by the first adsorption base 11 and the first pasting start end adsorption base 12 (the polarizing plate 31 adsorbed and held by the first pasting start end adsorption base 12). ) Is moved in the direction of arrow 43 in the figure while the relative positional relationship between the polarizing plate 31 and the liquid crystal panel 1 is adjusted. At this time, the first adsorption base 11 is rotated in the direction of the arrow 41 in the figure, and is inclined so that the polarizing plate 31 at the position adsorbed and held by the first adsorption base 11 does not contact the liquid crystal panel 1. Placed in posture. The first polarizing plate pasting roller 13 is synchronized with the polarizing plate 31 sucked and held by the first suction base 11 and the first sticking start end suction base 12 moving in the direction of the arrow 43 in the figure. To move in the direction of arrow 43.

  On the other hand, the tip of the polarizing plate 32 adsorbed and held by the second adsorption base 21 and the second pasting start end adsorbing base 22 (the polarizing plate 32 adsorbed and held by the second pasting start end adsorbing base 22) is the polarizing plate. While the relative positional relationship between the liquid crystal panel 1 and the liquid crystal panel 1 is adjusted, the liquid crystal panel 1 is moved in the direction of the arrow 44 in the figure. At this time, the second adsorption base 21 is rotated in the direction of the arrow 42 in the drawing, and is inclined so that the polarizing plate 32 at the position adsorbed and held by the second adsorption base 21 does not contact the liquid crystal panel 1. Placed in posture. The second polarizing plate pasting roller 23 synchronizes with the movement of the polarizing plate 32 sucked and held by the second suction base 21 and the second sticking start end suction base 22 in the direction of the arrow 44 in the figure. Are moved in the direction of arrow 44. With the above operation, as shown in FIG. 1B, the sticking process of the sticking start end portion of the polarizing plate 31 to the first main surface (CF surface) 1 a of the liquid crystal panel 1 and the second main surface of the liquid crystal panel 1 are performed. (TFT surface) The process of attaching the starting end of the polarizing plate 32 to the polarizing plate 32 is started. Here, the location where the polarizing plate 31 is pressed against the first main surface (CF surface) 1a of the liquid crystal panel 1 by the first polarizing plate pasting roller 13 is the first reference position. Similarly, the position where the polarizing plate 32 is pressed against the second main surface (TFT surface) 1b of the liquid crystal panel 1 by the second polarizing plate attaching roller 23 is the first reference position.

  The polarizing plates 31 and 32 are pressed against the liquid crystal panel 1 with a predetermined pressing force by the first polarizing plate pasting roller 13 and the second polarizing plate pasting roller 23. The first sticking start edge adsorbing base 12, the second sticking start edge adsorbing base 22, the first polarizing plate pasting roller 13 and the second polarizing plate pasting roller 23 are arranged on the liquid crystal panel 1 and the polarizing plates 31 and 32 are first polarized light. While being pressed by the plate pasting roller 11 and the second polarizing plate pasting roller 21, it moves in the direction of the arrow 45a in the figure while maintaining the relative positional relationship between them. As a result, as shown in FIG. 1B, the polarizing plates 31 and 32 are gradually attached to the liquid crystal panel 1 from a position slightly closer to the center from the sticking start edge toward the tip. .

  In FIG. 1C, the first sticking start end suction base 12, the second sticking start end suction base 22, the first polarizing plate pasting roller 13, and the second polarizing plate pasting roller 23 move in the direction of the arrow 45a. By doing so, the step of attaching the polarizing plates 31 and 32 to the end portion of the first main surface (CF surface) and the second main surface (TFT surface) of the liquid crystal panel 1 is completed. When this pasting step is completed, the movement of the first pasting start end suction base 12, the second pasting start end suction base 22, the first polarizing plate pasting roller 13 and the second polarizing plate pasting roller 23 is stopped. FIG. 1C shows a state when the first sticking start end suction base 12, the second sticking start end suction base 22, the first polarizing plate pasting roller 13 and the second polarizing plate pasting roller 23 are stopped. . Next, the first and second adsorption bases 11 and 21 adsorb the first main surface (CF surface) and the second main surface (TFT surface) of the liquid crystal panel 1 from the state shown in FIG. A process of attaching the polarizing plates 31 and 32 held, that is, a second attaching process of attaching the remaining polarizing plates 31 and 32 to the liquid crystal panel 1 other than the part attached in the first attaching process is started. Is done. First, the first sticking start end suction base 12, the second sticking start end suction base 22, the first polarizing plate pasting roller 13 and the second polarizing plate pasting roller 23 move in the direction of the arrow 45b, and the first It moves to the position of FIG. 2 (A) which is the reference position and the second reference position, and stops. At this time, the first polarizing plate attaching roller 13 and the second polarizing plate attaching roller 23 may be separated from the first main surface and the second main surface of the liquid crystal panel 1, It may be in a pressed state.

  FIG. 2A shows that the first sticking start end suction base 12, the second sticking start end suction base 22, the first polarizing plate pasting roller 13 and the second polarizing plate pasting roller 23 are directed in the left direction in the figure. The first polarizing plate pasting roller 13 and the second polarizing plate pasting roller 23 are pasted at the pasting start position of the pasting start end of the polarizing plates 31 and 32 (first reference position and second second pasting position). The reference point is reached. In FIG. 2A, polarizing plates 31 and 32 are the remaining polarizing plates other than the portion pasted on the liquid crystal panel 1 in the pasting step of the pasting start end that is the first pasting step. The sticking end end side is sucked and held by the first and second suction bases 11 and 21. The first polarizing plate pasting roller 13 and the second polarizing plate pasting roller 23 are pasting start positions (first reference position and second reference position) in the pasting process of the sticking start ends of the polarizing plates 31 and 32. The polarizing plates 31 and 32 are pressed against the liquid crystal panel 1 with a predetermined pressing force. The liquid crystal panel 1 moves in the direction of the arrow 45 in the drawing in a state where the polarizing plates 31 and 32 are pressed by the first and second polarizing plate pasting rollers 13 and 23. In addition, since the polarizing plates 31 and 32 are partly attached to the first main surface and the second main surface of the liquid crystal panel 1 in the first attaching step, the polarizing plates 31 and 32 together with the movement of the liquid crystal panel 1 together. Move in the direction of arrow 45.

  2B, polarizing plates 31 and 32 are pressed against the liquid crystal panel 1 with a predetermined pressing force by the first polarizing plate pasting roller 13 and the second polarizing plate pasting roller 23, and the liquid crystal panel 1 is shown in the drawing. As the sheet moves in the direction of the arrow 45, the liquid crystal panel 1 is gradually pasted toward the end of the pasting. FIG. 2B shows a state in which the polarizing plates 31 and 32 are gradually attached to the liquid crystal panel 1 as the liquid crystal panel 1 moves in the direction of the arrow 45 in the drawing.

  In FIG. 2C, when the entire liquid crystal panel 1 has finished moving in the direction of the arrow 45, the first and second main surfaces (CF surface) and the second main surface (TFT surface) of the liquid crystal panel 1 are The attaching process of the polarizing plates 31 and 32 on the second adsorption bases 11 and 21 side ends. That is, the process of attaching the polarizing plates 31 and 32 to the first main surface (CF surface) and the second main surface (TFT surface) of the liquid crystal panel 1 is completed. FIG. 2C shows a state at the time when this process is completed. As shown in FIG. 2C, the polarizing plates 31 and 32 attached to the first main surface (CF surface) 1a and the second main surface (TFT surface) 1b of the liquid crystal panel 1 are the first main surface. The polarizing plate 31 attached to the (CF surface) 1a and the polarizing plate 32 attached to the second main surface (TFT surface) 1b are different from each other, and both end surfaces of the polarizing plate 31 in the horizontal direction of the drawing. Is longer than both end faces of the polarizing plate 32. Thus, it can be seen that even when the sizes of the polarizing plates 31 and 32 are different from each other, the polarizing plate 32 is accurately attached to substantially the center of the polarizing plate 31. Thus, when the bonding process of the polarizing plate 31 and the polarizing plate 32 to the first main surface (CF surface) 1a and the second main surface (TFT surface) 1b of the liquid crystal panel 1 is completed, the liquid crystal panel 1 is It moves rightward (in the direction of arrow 45) and is discharged from the polarizing plate pasting line.

  As described above, the step of attaching the polarizing plate 31 and the polarizing plate 32 to the first main surface (CF surface) 1a and the second main surface (TFT surface) 1b of the liquid crystal panel 1 in the standing state is started to attach the polarizing plate. By separating the first pasting step of pasting the end side from the second pasting step of pasting the remaining polarizing plate in addition to the portion pasted in the first pasting step, the first of the liquid crystal panel 1 The polarizing plate 31 to be attached to the first main surface (CF surface) 1a and the polarizing plate 32 to be attached to the second main surface (TFT surface) 1b are different from each other. Even if there is a difference between the polarizing plate 31, the polarizing plate 31 and the polarizing plate 32 are simultaneously applied to the first main surface (CF surface) 1a and the second main surface (TFT surface) 1b of the liquid crystal panel 1 by the attaching roller. Well, there are also bubbles at the beginning Preventing and can be attached to the first major surface (CF surface) 1a and the second main surface (TFT surface) 1b of the liquid crystal panel 1 and polarizer 31 and the polarizer 32 at the same time. In the above-described embodiment, the case where the polarizing plate 31 and the polarizing plate 32 are attached to the standing liquid crystal panel has been described. However, the present invention can also be applied to the case where the liquid crystal panel moves in a horizontal plane. is there. In this case, it is necessary to appropriately adjust the arrangement and suction force of the suction holes for vacuum suction of the suction base located above the liquid crystal panel. The present invention can also be applied to the case where the polarizing plate 31 and the polarizing plate 32 have the same size. The present invention is not limited to the application of a polarizing plate to a liquid crystal panel, but can be widely applied to the application of an optical film having a protective film to a display panel. Furthermore, although this invention demonstrated the case where a polarizing plate was affixed on both surfaces of a liquid crystal panel substantially simultaneously, it is applicable also when affixing only on one side and affixing on another side in another process.

  In the above-described embodiment, the first sticking start end suction base 12, the second sticking start end suction base 22, and the first polarizing plate when the second sticking process is performed after the first sticking process is finished. Although the case where the pasting roller 13 and the second polarizing plate pasting roller 23 move in the left direction in the figure in synchronization is described, the first polarizing plate pasting roller 13 and the second polarizing plate pasting roller 23 are described. Only may move to the left. Further, in the above-described embodiment, the first polarizing plate attaching roller 13 and the second polarizing plate attaching roller 23 in the second attaching step are the steps of attaching the polarizing plate 31 and 32 at the beginning of attaching. The case where the polarizing plates 31 and 32 are pressed against the liquid crystal panel 1 with a predetermined pressing force at the sticking start position (first reference position and second reference position) has been described, but FIG. From the state C), the first polarizing plate pasting roller 13 and the second polarizing plate pasting roller 23 are pressed against the liquid crystal panel 1 with a predetermined pressing force using the first polarizing plate pasting roller 13 and the second polarizing plate pasting roller 23. By moving the second polarizing plate pasting roller 23, the first suction base 11 and the second suction base 21 to the left, the remaining polarizing plates 31 and 32 other than the portions pasted in the first pasting step. LCD panel It may be performed second attaching step of attaching to. In the above-described embodiment, in the first pasting step, the first pasting start end suction base 12, the second pasting start end suction base 22, the first polarizing plate pasting roller 13, and the second polarizing plate pasting roller 23. In the second attaching step, the liquid crystal panel 1 is moved. However, this is an example, so that a polarizing plate can be attached to the surface of the liquid crystal panel 1. It is only necessary that the constituent elements move relatively. For example, in the first pasting step, the first pasting start end suction base 12, the second pasting start end suction base 22, the first polarizing plate pasting roller 13 and the second polarizing plate pasting roller 23 are fixed, Other components may move, or in the second attaching step, the liquid crystal panel 1 may be fixed and other components may move.

It is a figure which shows schematic structure of the part which performs the polarizing plate sticking operation | work of the polarizing plate sticking apparatus by one embodiment of this invention, The 1st main surface (CF surface) and 2nd main surface (TFT surface) of a liquid crystal panel ) Shows a first attaching step for attaching a polarizing plate. A second attaching step of attaching a polarizing plate to the first main surface (CF surface) and the second main surface (TFT surface) of the liquid crystal panel is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Liquid crystal panel 1a ... 1st main surface 1b ... 2nd main surface 11 ... 1st adsorption base 12 ... 1st sticking start edge adsorption base 13 ... 1st polarizing plate sticking roller 21 ... 2nd adsorption base 22 ... 2nd Adhesion start end adsorbing base 23 ... second polarizing plate attaching rollers 31, 32 ... polarizing plate

Claims (9)

The optical film is moved by moving the optical film and the display panel relative to the roller means while pressing the optical film against the display panel using roller means longer than the width direction of the optical film. An optical film affixing method to affix to the display panel,
The optical film is placed between the main surface of the display panel and the roller means in a state where the separated surface regions in the vicinity of both ends of the optical film are sucked and held by the first and second suction base means, respectively. A portion of the optical film that is not sucked and held by the first and second suction base means and the roller means are moved to a position facing each other;
Using the portion of the optical film that is not sucked and held by the first and second suction base means as a reference position, the roller means is pressed and held by the first suction base means while being pressed against the display panel. A part of the optical film is pasted on the display panel by moving relatively toward the end on the other side,
The display is achieved by returning the roller means to the reference position and moving the roller means toward the end of the suction-holding side of the second suction-base means while pressing the roller means against the display panel. The remaining part of the said optical film is affixed on the panel for optical films. The optical film affixing method characterized by the above-mentioned. In the optical film affixing method according to claim 1,
When pasting a part of the optical film on the display panel, in a state where the movement of the display panel and the optical film is stopped, the roller means and the first suction base means are moved synchronously,
An optical film attaching method, wherein when the remaining portion of the optical film is attached to the display panel, the display panel is moved in a state where movement of the roller means is stopped. Using the first and second roller means longer than the width direction of the optical film, the first and second optical films are attached to the display panel from the first and second main surface sides. The first and second optical films are moved by moving the first and second optical films and the display panel relative to the first and second roller means while being pressed against the two main surfaces. An optical film attaching method for attaching a film to the display panel almost simultaneously,
The first optical film is held on the first main surface of the display panel in a state where the separated surface regions in the vicinity of both end portions of the first optical film are sucked and held by the first and second suction base means, respectively. Between the first roller means and the first roller means, the portion of the first optical film that is not sucked and held by the first and second suction base means and the first roller means face each other. The second optical film is moved to such a position and held by the third and fourth suction base means so as to include the surfaces in the vicinity of both ends of the second optical film. Between the second main surface of the panel for use and the second roller means, and the second optical film that is not sucked and held by the third and fourth suction base means, and the second Roller means It is moved to a position to face the,
The first optical film is pressed against the display panel with the first optical film as a first reference position where the first optical film is not held by the first and second suction base means, and the second optical film. The first and third suction bases are pressed against the display panel while the second roller means is pressed against the display panel with the portion of the film not sucked and held by the fourth suction base means as a second reference position. A part of the first and second optical films is attached to the display panel almost simultaneously by moving relatively toward the end of the side held by the means;
Returning the first and second roller means to the first and second reference positions and pressing the first and second roller means against the display panel while the second and fourth suction base means A method of attaching an optical film, comprising: adhering the remaining portions of the first and second optical films to the display panel by relatively moving toward an end portion on the side held by suction. . In the optical film affixing method according to claim 3,
When pasting a part of the first and second optical films on the display panel, the first and second optical films are stopped in a state where movement of the display panel and the first and second optical films is stopped. The roller means and the first and third suction base means synchronously move,
When the remaining portions of the first and second optical films are attached to the display panel, the display panel is moved in a state where movement of the first and second roller means is stopped. Optical film pasting method A display panel moving means for moving the display panel;
First and second surfaces are respectively held by sucking and holding the separated surface regions in the vicinity of both end portions of the optical film so that the first main surface of the display panel and the surface of the optical film face each other. Adsorption base means;
Roller means for attaching the optical film to the display panel by relatively moving the optical film against the display panel using a roller longer than the width direction of the optical film;
In a state where the optical film is sucked and held by the first and second suction base means, respectively, between the main surface of the display panel and the roller means, the first and second of the optical film. The optical film is moved to a position where the roller means is opposed to the portion that is not sucked and held by the suction base means,
Using the portion of the optical film that is not sucked and held by the first and second suction base means as a reference position, the roller means is pressed and held by the first suction base means while being pressed against the display panel. A part of the optical film is attached to the display panel by relatively moving toward the end on the other side, the roller means is returned to the reference position, and the roller means is pressed against the display panel. And a control means for attaching the remaining portion of the optical film to the display panel by relatively moving toward the end of the second suction base means that is sucked and held. An optical film pasting apparatus. 6. The optical film sticking apparatus according to claim 5, wherein the control means is
When pasting a part of the optical film on the display panel, in a state where the movement of the display panel and the optical film is stopped, the roller means and the first suction base means are moved synchronously,
An optical film attaching apparatus, wherein when the remaining portion of the optical film is attached to the display panel, the display panel is moved in a state where movement of the roller means is stopped. A display panel moving means for moving the display panel;
The separated surface regions in the vicinity of both end portions of the first optical film are sucked and held, respectively, and moved to positions where the first main surface of the display panel and the surface of the first optical film face each other. First and second adsorption base means;
The separated surface regions in the vicinity of both ends of the second optical film are sucked and held, respectively, and moved to positions where the second main surface of the display panel and the surface of the second optical film face each other. Third and fourth adsorption base means;
The first optical film is moved relatively while pressing the first optical film against the first main surface of the display panel using a roller longer than the width direction of the first optical film. First roller means for attaching to the first main surface of the display panel;
The second optical film is moved relatively while pressing the second optical film against the second main surface of the display panel using a roller longer than the width direction of the second optical film. Second roller means for attaching to the second main surface of the display panel;
The first optical film is held on the first main surface of the display panel in a state where the separated surface regions in the vicinity of both end portions of the first optical film are sucked and held by the first and second suction base means, respectively. Between the first roller means and the first roller means, the portion of the first optical film that is not sucked and held by the first and second suction base means and the first roller means face each other. The second optical film is moved to such a position, and the second optical film is displayed in the state where the separated surface regions in the vicinity of both ends of the second optical film are sucked and held by the third and fourth sucking base means, respectively Between the second main surface of the panel for use and the second roller means, and the second optical film that is not sucked and held by the third and fourth suction base means, and the second With roller means There is moved to a position to face the,
The first optical film is pressed against the display panel with the first optical film as a first reference position where the first optical film is not held by the first and second suction base means, and the second optical film. The first and third suction bases are pressed against the display panel while the second roller means is pressed against the display panel with the portion of the film not sucked and held by the fourth suction base means as a second reference position. A part of the first and second optical films is attached to the display panel almost simultaneously by moving relatively toward the end of the side held by the means;
Returning the first and second roller means to the first and second reference positions and pressing the first and second roller means against the display panel while the second and fourth suction base means And a control means for attaching the remaining portions of the first and second optical films to the display panel by relatively moving toward the end on the side held by suction. Optical film pasting device. The optical film sticking apparatus according to claim 7, wherein the control means includes:
When pasting a part of the first and second optical films on the display panel, the first and second optical films are stopped in a state where movement of the display panel and the first and second optical films is stopped. The roller means and the first and third suction base means synchronously move,
When the remaining portions of the first and second optical films are attached to the display panel, the display panel is moved in a state where movement of the first and second roller means is stopped. An optical film pasting apparatus.   An optical film is affixed on a display panel using the optical film affixing method according to any one of claims 1 to 4 or the optical film affixing device according to any one of claims 5 to 8. A display panel manufacturing method characterized by the above.

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