WO2017170016A1

WO2017170016A1 - Coupled polarizer and method for manufacturing display panel

Info

Publication number: WO2017170016A1
Application number: PCT/JP2017/011346
Authority: WO
Inventors: 勝寛山口; 裕二谷口
Original assignee: シャープ株式会社
Priority date: 2016-03-29
Filing date: 2017-03-22
Publication date: 2017-10-05

Abstract

A coupled polarizer 20 comprises a plurality of polarizers 12 arranged side by side, and a separator layer (polarizer supporter) 21 that extends along the arrangement direction of the plurality of polarizers 12 and supports the plurality of polarizers 12, the separator layer 21 including at least a polarizer superposition part 22 superimposed on the plurality of polarizers 12 and an extension part 25 extending from the polarizer superposition part 22 along a direction perpendicular to the arrangement direction.

Description

Compound polarizing plate and display panel manufacturing method

The present invention relates to a method of manufacturing a coupled polarizing plate and a display panel.

As an example of a conventional method for manufacturing a liquid crystal display device, one described in Patent Document 1 below is known. The manufacturing method of the liquid crystal display device described in Patent Document 1 includes a bonding step in which two mother substrates are bonded to each other to form a bonded mother substrate, and a step of filling liquid crystal in each region to be a liquid crystal layer And after the liquid crystal filling step, the step of dividing the bonded mother substrate to form a bonded strip-shaped substrate, the step of bonding a polarizing plate to both surfaces of the bonded strip-shaped substrate, and the bonded strip-shaped substrate The polarizing plate part removing step of scraping and removing the polarizing plate in the region that becomes the boundary between the liquid crystal display panels on both sides of the polarizing plate, and after the polarizing plate part removing step, An inspection step of performing a lighting inspection of the plurality of liquid crystal display panels included in the bonded strip-shaped substrate in a state.

JP 2007-140283 A

(Problems to be solved by the invention)
In the manufacturing method of the liquid crystal display device described in Patent Document 1 described above, after a strip-shaped polarizing plate is bonded and bonded to the strip-shaped substrate, a region serving as a boundary between the liquid crystal display panels in the polarizing plate is cut with a blade. After that, the bonded strip-shaped substrate with the polarizing plate attached thereto was cut to separate the liquid crystal display panel. In such a manufacturing method, since the operation | work which cuts out the polarizing plate affixed on the bonding strip-shaped board | substrate with a blade is required, the problem that productivity was not good occurred.

The present invention has been completed based on the above circumstances, and aims to improve productivity.

(Means for solving the problem)
The first coupled polarizing plate of the present invention includes a plurality of polarizing plates arranged in a row, and a polarizing plate carrier that supports the plurality of polarizing plates extending along an alignment direction of the plurality of polarizing plates. A polarizing plate carrier having at least a polarizing plate overlapping portion that overlaps a plurality of the polarizing plates, and an overhanging portion that protrudes from the polarizing plate overlapping portion in an orthogonal direction orthogonal to the arrangement direction. Prepare.

In this way, the polarizing plate carrier extending along the alignment direction of the plurality of polarizing plates carries the plurality of polarizing plates by the polarizing plate overlapping portion that overlaps with the plurality of polarizing plates. The polarizing plate can be transported or pasted together. Therefore, it is not necessary to cut off the polarizing plate using a blade after pasting the polarizing plate as in the prior art, which is excellent in productivity. Here, when transporting the coupled polarizing plate, among the plurality of polarizing plates, there is a concern that another member or the like may interfere with the vicinity of the end portion in the orthogonal direction perpendicular to the arrangement direction. If interference occurs, the polarizing plate may be damaged. In that respect, the polarizing plate carrier has a protruding portion that protrudes in the orthogonal direction perpendicular to the alignment direction from the overlapping portion of the polarizing plate, so that the protruding portion interferes with the vicinity of the end in the orthogonal direction of the polarizing plate. It is possible to protect from other members that may be damaged. This makes it difficult for the polarizing plate to be damaged, thereby improving the yield and the like.

As an embodiment of the first coupled polarizing plate of the present invention, the following configuration is preferable.
(1) A plurality of the polarizing plate overlapping portions are arranged side by side along the arrangement direction, and the polarizing plate carrier has an intermediate portion interposed between the adjacent polarizing plate overlapping portions. . As described above, the intermediate portion is interposed between the adjacent polarizing plate overlapping portions, so that the plurality of polarizing plates are supported by the polarizing plate carrier in a form spaced apart in the arrangement direction.

(2) An intermediate polarizing plate disposed between the adjacent polarizing plates and supported by the polarizing plate carrier is provided. In this way, the end face on the side of the intermediate polarizing plate in each polarizing plate is protected by the intermediate polarizing plate interposed between the adjacent polarizing plates, so that the polarizing plate is less susceptible to damage and the yield is further improved.

(3) The overhanging portion extends over the entire length of the polarizing plate carrier. In this case, the strength of the polarizing plate carrier is higher than that in the case where the protruding portion partially protrudes from the polarizing plate overlapping portion, which is suitable for improving the yield. .

(4) A pair of the overhang portions are provided in such a manner as to sandwich the polarizing plate overlapping portion from both sides in the orthogonal direction. If it does in this way, protection of a polarizing plate will become more reliable by a pair of overhang | projection part, and damage etc. will become difficult to produce to a polarizing plate.

(5) The plurality of polarizing plates have a polygonal planar shape and rounded corners. In this way, stress concentration is less likely to occur at the corners of the polarizing plate having a polygonal planar shape, so that damage to the polarizing plate is less likely to occur.

The second coupled polarizing plate of the present invention is a polarizing plate carrier extending in a strip shape, and a plurality of polarizing plates carried on the polarizing plate carrier side by side along the extending direction of the polarizing plate carrier. And a plurality of polarizing plates whose planar shape is polygonal and whose corners are rounded.

In this way, since a plurality of polarizing plates are supported by the polarizing plate carrier extending in a band shape, the plurality of polarizing plates can be transported or pasted together. Therefore, it is not necessary to cut off the polarizing plate using a blade after pasting the polarizing plate as in the prior art, which is excellent in productivity. Here, when transporting the coupled polarizing plate, there is a concern that other members may interfere near the corners of the plurality of polarizing plates whose planar shape is polygonal, and such interference occurs. The polarizing plate may be damaged. In that respect, since the plurality of polarizing plates have rounded corners, stress concentration on the corners is alleviated even if other members interfere with each other. This makes it difficult for the polarizing plate to be damaged, thereby improving the yield and the like.

Next, in order to solve the above problems, a display panel manufacturing method of the present invention is a display panel manufacturing method using the above-described coupled polarizing plate, and a display panel for manufacturing a plurality of display panel bodies A main body manufacturing step, and a polarizing plate pasting step of collectively pasting the plurality of polarizing plates provided in the coupled polarizing plate to the plurality of display panel main bodies. According to such a display panel manufacturing method, when a plurality of display panel main bodies are manufactured through the display panel main body manufacturing process, a plurality of the polarizing plates provided for the plurality of display panel main bodies in the polarizing plate pasting process are provided. The polarizing plates are pasted together. In addition to improving the yield of multiple polarizing plates in a coupled polarizing plate, multiple polarizing plates can be attached to multiple display panel bodies at the same time. Preferred.

(The invention's effect)
According to the present invention, productivity and yield can be improved.

1 is a schematic cross-sectional view showing a cross-sectional configuration of a liquid crystal panel according to Embodiment 1 of the present invention. Plan view of coupled polarizing plate AA line sectional view of FIG. BB sectional view of FIG. Sectional drawing which shows the state which positioned the coupled polarizing plate with respect to the liquid crystal panel main body Sectional drawing which shows the state by which the separator layer of the coupled polarizing plate was peeled off Sectional drawing which shows the state in the middle of sticking a polarizing plate to a liquid crystal panel body Sectional drawing which shows the state by which the polarizing plate was affixed on the liquid crystal panel main body Sectional drawing which shows the operation | work which takes out the liquid crystal panel main body with the polarizing plate stuck The top view of the compound polarizing plate concerning Embodiment 2 of the present invention. BB sectional view of FIG. The top view of the compound polarizing plate concerning Embodiment 3 of the present invention. The top view of the compound polarizing plate concerning Embodiment 4 of the present invention. AA line sectional view of FIG. The top view of the compound polarizing plate concerning Embodiment 5 of the present invention. Plan view of a coupled polarizing plate according to another embodiment (1) of the present invention

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, the manufacturing method of the liquid crystal panel (display panel) 11 using the coupled polarizing plate 20 and the coupled polarizing plate 20 is illustrated. In addition, a part of each drawing shows an X axis, a Y axis, and a Z axis, and each axis direction is drawn to be a direction shown in each drawing. Further, with respect to the vertical direction, each figure excluding FIG. 2 is used as a reference, and the upper side of the figure is the front side and the lower side of the figure is the back side.

First, the liquid crystal display device 10 including the liquid crystal panel 11 according to the present embodiment is preferably used for an electronic device (not shown) such as a so-called wearable terminal such as a smart watch or a head mounted display. The screen size of the liquid crystal panel 11 is a size classified into ultra-small, for example, 1 inch or less. The liquid crystal panel 11 having a screen size of 1 inch or less may have a side length of 20 mm or less, and in some cases, a side length may be about 8 mm. Note that the use of the liquid crystal display device 10 is not limited to the wearable terminal, and it can of course be widely used for other electronic devices.

Subsequently, the liquid crystal panel 11 will be described. As shown in FIG. 1, the liquid crystal panel 11 is interposed between a pair of

glass substrates

11 a and 11 b that are substantially transparent and have excellent translucency, and both the

substrates

11 a and 11 b, and has optical characteristics as an electric field is applied. And a liquid crystal layer 11e containing liquid crystal molecules (liquid crystal material) which is a substance that changes. Among the pair of

substrates

11a and 11b, the array substrate 11b arranged on the back side includes source wiring and gate wiring orthogonal to each other, a TFT 11g as a switching element connected to these wirings, a pixel electrode 11h connected to the TFT 11g, Further, an alignment film 11o and the like are provided, and a color filter 11k in which colored portions such as R (red), G (green), and B (blue) are arranged in a predetermined arrangement on the CF substrate 11a disposed on the front side. A black matrix (light-shielding layer) 11l that partitions the colored portions, a counter electrode 11m, an alignment film 11n, and the like are provided.

As shown in FIG. 1, polarizing plates 12 are attached to the outer surface sides of both

substrates

11a and 11b. The pair of polarizing plates 12 have substantially the same size in a plan view, and the size is slightly larger than the display area on the liquid crystal panel 11 where an image is displayed, but is larger than the outer shape of the CF substrate 11a. Is slightly smaller. Specifically, the polarizing plate 12 according to the present embodiment has a long side dimension of, for example, about 15.02 mm and a short side dimension of, for example, about 12.1 mm, but these specific dimensions are appropriately changed. Is possible.

In manufacturing the liquid crystal panel 11 having the above-described configuration, a coupled polarizing plate 20 having a plurality of polarizing plates 12 is used. The coupled polarizing plate 20 will be described below. As shown in FIG. 2, the coupled polarizing plate 20 includes a plurality of (seven in FIG. 2) polarizing plates 12 arranged in a line along the X-axis direction, and the alignment direction (X And at least a separator layer (polarizing plate carrier) 21 that extends along the axial direction and carries a plurality of polarizing plates 12. In the coupled polarizing plate 20, the plurality of polarizing plates 12 are supported on the separator layer 21 in a state where they are separated from each other and can be peeled off. In this way, the separator layer 21 extending along the alignment direction of the plurality of polarizing plates 12 carries the plurality of polarizing plates 12, thereby transporting and pasting the plurality of polarizing plates 12 together. It can be attached. Therefore, it is not necessary to cut off the polarizing plate using a blade after pasting the polarizing plate as in the prior art, which is excellent in productivity.

As shown in FIG. 2, the polarizing plate 12 has a vertically long rectangular shape (polygonal shape) following the outer shape of the liquid crystal panel 11, and has corner portions 12CN whose inner angles are substantially right angles at the four corners. ing. The polarizing plates 12 are arranged on the separator layer 21 at regular intervals along the X-axis direction, that is, intermittently arranged. As shown in FIGS. 3 and 4, the polarizing plate 12 is disposed on a polarizing layer 12a for producing linearly polarized light from circularly polarized light, and on the surface of the polarizing layer 12a opposite to the separator layer 21 side. A laminator layer (protective layer) 12b, and a fixing layer 12c disposed on the surface of the polarizing layer 12a on the separator layer 21 side (the side opposite to the laminator layer 12b side). The polarizing layer 12a includes a polarizer formed by orienting an absorber such as iodine or a dichroic dye in a polymer resin film such as a PVA (polyvinyl alcohol) film and stretching the polarizer. The structure is sandwiched between protective films such as a triacetyl cellulose film. In addition, the specific structure of the polarizing layer 12a is not limited to the above, It can change suitably. The laminator layer 12b constitutes the outer surface of the pair of front and back plate surfaces of the polarizing plate 12 that is opposite to the bonding surface side of the CF substrate 11a or the array substrate 11b to be bonded. It is supposed to prevent scratches caused by rubbing. The fixing layer 12c is made of an adhesive material, and is disposed on the bonding surface of the pair of front and back plate surfaces of the polarizing plate 12, and has a function of fixing the polarizing plate 12 to the outer surfaces of the

substrates

11a and 11b. In the coupled polarizing plate 20, the separator layer 21 is fixed to the fixing layer 12 c in a peelable state, whereby the polarizing plate 12 is supported on the separator layer 21.

As shown in FIG. 2, the separator layer 21 is made of a synthetic resin film material, and has a strip shape extending linearly along the X-axis direction (alignment direction of the polarizing plates 12). The separator layer 21 is positioned at both ends in the X-axis direction, with a plurality of polarizing plate overlapping portions 22 overlapping with the plurality of polarizing plates 12, a plurality of intermediate portions 23 interposed between adjacent polarizing plate overlapping portions 22, and the X axis direction. A pair of positioning portions 24 projecting outward along the X-axis direction with respect to the polarizing plate overlapping portion 22, and the Y-axis direction (orthogonal direction orthogonal to the arrangement direction) from each polarizing plate overlapping portion 22 and each intermediate portion 23 And an overhanging portion 25 projecting over the surface. Hereinafter, the constituent parts 22 to 25 of the separator layer 21 will be sequentially described in detail.

As shown in FIGS. 2 and 3, the polarizing plate overlapping portion 22 has the same planar shape and area as the polarizing plate 12. A plurality of polarizing plate superimposing portions 22 are arranged along the X-axis direction at regular intervals according to the planar arrangement of the plurality of polarizing plates 12, and the number of the polarizing plate overlapping portions 22 is equal to the number of the polarizing plates 12 installed. equal. The intermediate part 23 connects between the polarizing plate overlapping parts 22 adjacent in the X-axis direction. That is, most of the separator layer 21 has a configuration in which the polarizing plate overlapping portion 22 and the intermediate portion 23 are alternately and repeatedly arranged along the X-axis direction. The number of installed intermediate parts 23 is a value obtained by subtracting 1 from the number of installed polarizing plate overlapping parts 22. The intermediate part 23 has a long side dimension that is substantially the same as the long side dimension of the polarizing plate 12 and a short side dimension that is smaller than the short side dimension of the polarizing plate 12. Yes. As described above, the intermediate portion 23 is interposed between the adjacent polarizing plate overlapping portions 22, so that the plurality of polarizing plates 12 are supported by the separator layer 21 in a form spaced from each other in the X-axis direction.

As shown in FIGS. 2 and 3, a pair of positioning portions 24 are arranged in such a manner that a plurality of linearly aligned polarizing plates 12 are sandwiched from both sides in the X-axis direction that is the alignment direction. Although the pair of positioning portions 24 have a vertically long rectangular shape when viewed in a plane, similar to the polarizing plate overlapping portion 22 (polarizing plate 12), the size viewed in the plane is slightly larger than each polarizing plate 12. It is supposed to be small. Specifically, each positioning portion 24 has a long side dimension substantially the same as the long side dimension of the polarizing plate 12, whereas the short side dimension is smaller than the short side dimension of the polarizing plate 12. For example, it is about 10 mm. A positioning hole 24 a is formed through each positioning portion 24 at a predetermined distance from the boundary position between adjacent polarizing plate overlapping portions 22. The positioning hole 24a has a substantially circular planar shape, and its specific diameter is, for example, about 2 mm.

Subsequently, the overhang portion 25 will be described. As shown in FIGS. 2 and 4, a pair of overhang portions 25 are provided so as to protrude from the respective polarizing plate overlapping portions 22, the respective intermediate portions 23, and the respective positioning portions 24 to both outer sides along the Y-axis direction. Yes. That is, the pair of overhanging portions 25 form a belt shape extending along the entire length of the separator layer 21 along the X-axis direction, and each polarizing plate overlapping portion 22, each intermediate portion 23, and each positioning portion 24 are arranged in the Y-axis direction. It is arranged in a form that is sandwiched from both sides. And each overhang | projection part 25 is outside the both ends about the Y-axis direction (long-side direction) with respect to each polarizing plate 12 carried on the separator layer 21 and each intermediate polarizing plate 26 described later. It is supposed to be overhanging. Here, when transporting the coupled polarizing plate 20 from the manufacturing location to the location where the liquid crystal panel 11 is affixed (the manufacturing location of the liquid crystal panel 11), or when transporting the liquid crystal panel 11 within the manufacturing location, Other members may interfere with each end of the polarizing plate 12 with respect to the Y-axis direction, and damage such as the occurrence of minute cracks at each end, particularly each corner 12CN, may occur. In that respect, since each polarizing plate 12 is protected by each overhanging portion 25 projecting outward from both ends in the Y-axis direction, each polarizing plate 12 has a protection against each end in the Y-axis direction. Interference with other members is less likely to occur. As a result, the occurrence of damage such as the occurrence of minute cracks at each end in the Y-axis direction of each polarizing plate 12, especially each corner 12CN, is suppressed, thereby improving the yield of the coupled polarizing plate 20. It is done. And since each overhang | projection part 25 is provided in the form extended over the full length of the separator layer 21, compared with the case where it is set as the structure where the overhang | projection part protrudes partially from the polarizing plate superimposition part 22, for example. The separator layer 21 has a high strength, which is suitable for improving the yield.

As shown in FIGS. 2 and 3, the coupled polarizing plate 20 includes a plurality of intermediate polarizing plates 26 arranged so as to overlap the intermediate portion 23. The intermediate polarizing plate 26 is disposed between the polarizing plates 12 adjacent to each other in the X-axis direction, and is supported on the separator layer 21. The intermediate polarizing plate 26 has the same planar shape and area as the intermediate portion 23, and the long side dimension is equal to the long side dimension of the polarizing plate 12, but the short side dimension is smaller than the short side dimension of the polarizing plate 12. Specifically, it is about 2 mm, for example. The intermediate polarizing plate 26 has the same cross-sectional configuration as the polarizing plate 12, and includes a polarizing layer 12 a, a laminator layer 12 b, and a fixing layer 12 c, and the fixing layer 12 c is fixed to the intermediate portion 23. , Carried on the separator layer 21. The number of intermediate polarizing plates 26 installed is equal to the number of intermediate units 23 installed. By interposing such an intermediate polarizing plate 26 between the adjacent polarizing plates 12, it is possible to protect the end face on the long side of each polarizing plate 12 facing the intermediate polarizing plate 26 side. Thereby, each polarizing plate 12 becomes difficult to receive damage etc., and the yield of the coupled polarizing plate 20 further improves. The intermediate polarizing plate 26 is not affixed to the liquid crystal panel 11 and can be said to be a “dummy polarizing plate”.

The coupled polarizing plate 20 having the above-described configuration is manufactured through the following coupled polarizing plate manufacturing process. That is, the coupled polarizing plate manufacturing process includes a separator layer manufacturing process for manufacturing the separator layer 21, and a polarizing plate base material manufacturing process for manufacturing a polarizing plate base material in which the plurality of polarizing plates 12 and the plurality of intermediate polarizing plates 26 are connected. The base material attaching step for attaching the polarizing plate base material to the separator layer 21 and the state where the polarizing plate base material attached to the separator layer 21 is cut and the polarizing plates 12 and the intermediate polarizing plates 26 can be separated from each other. And a polarizing plate separating step. In the base material attaching step, the polarizing plate base material is attached to the separator layer 21 separately manufactured through the separator layer manufacturing step and the polarizing plate base material manufacturing step, for example, by a roll-to-roll method. In the polarizing plate separation step, the polarizing plate base material is cut with a cutter at the positions where the plurality of polarizing plates 12 and the plurality of intermediate polarizing plates 26 are to be formed. In this polarizing plate separation step, the cut depth with respect to the polarizing plate base material is controlled so as not to reach the separator layer 21. As a result, as shown in FIGS. 2 to 4, a plurality of polarizing plates 12 and intermediate polarizing plates 26 that are separable from each other are arranged in a straight line along the X-axis direction by one separator layer 21. A coupled polarizing plate 20 that is supported in a lump is obtained.

Then, the manufacturing method of the liquid crystal panel 11 using the coupled polarizing plate 20 manufactured as mentioned above is demonstrated. The manufacturing method of the liquid crystal panel 11 includes a liquid crystal panel main body manufacturing process (display panel main body manufacturing process) for manufacturing a plurality of liquid crystal panel main bodies (display panel main bodies) 11B, and a coupled polarizing plate 20 for the plurality of liquid crystal panel main bodies 11B. And a polarizing plate attaching step of attaching a plurality of polarizing plates 12 provided at once. The “liquid crystal panel body 11B” referred to here is a state in which the pair of polarizing plates 12 is removed from the liquid crystal panel 11 described above (a state before attachment) (see FIG. 5).

The liquid crystal panel body manufacturing process includes a liquid crystal panel body base material manufacturing process (display panel body base material manufacturing process) for manufacturing a liquid crystal panel body base material (not shown) in which a plurality of liquid crystal panel bodies 11B are arranged in a matrix. A first dividing step of obtaining a strip-shaped liquid crystal panel main body in which a plurality of liquid crystal panel main bodies 11B arranged in a row by dividing the liquid crystal panel main body and separating the strip-shaped liquid crystal panel main body into a plurality of liquid crystal panels It includes at least a second dividing step for obtaining the main body 11B and a washing step for washing the liquid crystal panel main body 11B. The cleaning process is performed in order to remove particles that may adhere to the liquid crystal panel body 11B through the two dividing processes. At this time, since the polarizing plate 12 is not yet attached to the liquid crystal panel body 11B, a situation in which the performance of the polarizing plate 12 is deteriorated by the cleaning liquid is avoided.

The polarizing plate pasting step is performed using a polarizing plate pasting device PA. The polarizing plate pasting device PA includes a liquid crystal panel suction stage PAa that sucks and holds the liquid crystal panel body 11B as shown in FIG. The polarizing plate adsorption stage PAb that adsorbs and holds the coupled polarizing plate 20 and the pressure roller PAc that pressurizes the polarizing plate 12 against the liquid crystal panel body 11B. The liquid crystal panel suction stage PAa includes a liquid crystal panel alignment mark (not shown) for positioning the liquid crystal panel body 11B, and a pair of polarizing plate alignment marks PAd for positioning the coupled polarizing plate 20. , Is provided. As shown in FIG. 7, the pressure roller PAc has such a length that the plurality of polarizing plates 12 constituting the coupled polarizing plate 20 can be pressed together in the X-axis direction. In the polarizing plate attaching step, the liquid crystal panel main body setting step for adsorbing the same number (seven) of liquid crystal panel main bodies 11B as the polarizing plate 12 included in the compound polarizing plate 20 to the liquid crystal panel adsorption stage PAa, and the compound polarizing plate 20 A polarizing plate setting step for adsorbing the polarizing plate to the polarizing plate adsorption stage PAb, a positioning step for positioning the coupled polarizing plate 20 and each liquid crystal panel body 11B, and a separator peeling step for peeling the separator layer 21 of the coupled polarizing plate 20 And a pressure attaching step of attaching each polarizing plate 12 to each liquid crystal panel body 11B by the pressure roller PAc.

In the liquid crystal panel main body setting step, as shown in FIG. 5, a plurality of liquid crystal panel main bodies 11B are set on the liquid crystal panel suction stage PAa so as to be arranged in a straight line at intervals in the X-axis direction. A plurality of liquid crystal panel main bodies 11B are vacuum-sucked by the suction stage PAa and held. At this time, the set position of each liquid crystal panel main body 11B is positioned by the alignment mark for liquid crystal panels. In the polarizing plate setting step, the coupled polarizing plate 20 is vacuum-sucked and held by the polarizing plate suction stage PAb. In the positioning step, the coupled polarizing plate 20 held by the polarizing plate suction stage PAb is disposed opposite to each liquid crystal panel main body 11B held by the liquid crystal panel suction stage PAa with a predetermined interval, and coupled. Using the pair of positioning portions 24 in the polarizing plate 20 and the pair of polarizing plate alignment marks PAd on the polarizing plate adsorption stage PAb, the coupled polarizing plate 20 is positioned with respect to each liquid crystal panel body 11B. Specifically, by aligning the liquid crystal panel suction stage PAa and the polarizing plate suction stage PAb relative to each other in the X-axis direction and the Y-axis direction, each polarizing plate alignment mark PAd is placed in each positioning hole 24a of each positioning portion 24. On the basis of the positional relationship between the edge of each positioning hole 24a and the alignment mark PAd for each polarizing plate, and the position where the alignment mark PAd for each polarizing plate reaches the center of each positioning hole 24a. Positioning is achieved by matching. In this positioning state, each polarizing plate 12 constituting the coupled polarizing plate 20 faces the liquid crystal panel body 11B with high accuracy.

Subsequently, in the separator peeling step, the separator layer 21 of the coupled polarizing plate 20 is peeled as shown in FIG. When the separator layer 21 is peeled off, the fixed layer 12c in each polarizing plate 12 constituting the coupled polarizing plate 20 is exposed. At this time, each polarizing plate 12 is in a state of being sucked and held by the polarizing plate suction stage PAb, and is kept in a state of being aligned with each liquid crystal panel body 11B. In the next pressure bonding step, the polarizing plate suction stage PAb, which has been in a substantially horizontal state, is tilted so that one end side thereof approaches the liquid crystal panel suction stage PAa in the Y-axis direction, as shown in FIG. The pressure roller PAc is brought into contact with one end side of each polarizing plate 12 in the Y-axis direction. At this time, the end portion of each polarizing plate 12 is pressed with a predetermined load by the pressure roller PAc, and attachment to each liquid crystal panel body 11B is started in a lump. From this state, the polarizing plate suction stage PAb and the pressure roller PAc are moved to the other end side (left side shown in FIG. 7) along the Y-axis direction with respect to the liquid crystal panel suction stage PAa. Then, each polarizing plate 12 is collectively affixed with respect to each liquid crystal panel main body 11B over the full length about the Y-axis direction by being pressurized by the pressure roller PAc. At this time, the fixing layer 12c of each polarizing plate 12 is fixed to the outer surface of each liquid crystal panel body 11B. As shown in FIG. 8, when each polarizing plate 12 is attached to each liquid crystal panel main body 11B, as shown in FIG. 9, the liquid crystal panel main body 11B having the polarizing plate 12 attached to one outer surface is liquid crystal. Remove from panel suction stage PAa. At this time, since the plurality of polarizing plates 12 are preliminarily separated from each other when the coupled polarizing plate 20 is manufactured, an operation of cutting the polarizing plate attached to the liquid crystal panel body with a blade as in the past Thus, the production efficiency is excellent and the surface of the liquid crystal panel main body 11B is prevented from being damaged. Thereafter, the polarizing plate 12 is attached to the other outer surface of the liquid crystal panel body 11B through a polarizing plate attaching step similar to the above. Thereby, the liquid crystal panel 11 by which the polarizing plate 12 was affixed on both outer surfaces, respectively is obtained.

As described above, since the plurality of polarizing plates 12 included in the coupled polarizing plate 20 are collectively attached to the plurality of liquid crystal panel bodies 11B, the screen size of the liquid crystal panel 11 is the same as in the present embodiment. Even if each polarizing plate 12 and each liquid crystal panel main body 11B are downsized as it is made 1 inch or less, they are excellent in handling properties and excellent in workability for attaching to each liquid crystal panel main body 11B. Such a polarizing plate pasting apparatus PA can be used for mechanization. Therefore, it is suitable for manufacturing a miniaturized liquid crystal panel 11 and also suitable for reducing the adjustment cost.

As described above, the coupled polarizing plate 20 of the present embodiment carries a plurality of polarizing plates 12 arranged in a row and a plurality of polarizing plates 12 extending along the direction in which the plurality of polarizing plates 12 are arranged. The separator layer (polarizing plate carrier) 21 is a polarizing plate overlapping portion 22 that overlaps the plurality of polarizing plates 12, and an overhang portion 25 that projects from the polarizing plate overlapping portion 22 in an orthogonal direction perpendicular to the alignment direction. And a separator layer 21 having at least.

In this way, the separator layer 21 extending along the alignment direction of the plurality of polarizing plates 12 carries the plurality of polarizing plates 12 by the polarizing plate overlapping portion 22 that overlaps the plurality of polarizing plates 12. Thereby, a plurality of polarizing plates 12 can be transported or pasted together. Therefore, it is not necessary to cut off the polarizing plate using a blade after pasting the polarizing plate as in the prior art, which is excellent in productivity. Here, when the coupled polarizing plate 20 is transported, among the plurality of polarizing plates 12, there is a concern that other members or the like may interfere with the vicinity of the end in the orthogonal direction orthogonal to the arrangement direction. When such interference occurs, the polarizing plate 12 may be damaged. In that respect, since the separator layer 21 has an overhanging portion 25 that protrudes from the polarizing plate overlapping portion 22 in an orthogonal direction orthogonal to the arrangement direction, the end portion of the polarizing plate 12 in the orthogonal direction by the overhanging portion 25. The vicinity can be protected from other members that may cause interference. As a result, the polarizing plate 12 is less likely to be damaged, and thus the yield can be improved.

The polarizing plate superimposing portions 22 are arranged in a plurality along the arrangement direction at intervals, and the separator layer 21 has an intermediate portion 23 interposed between adjacent polarizing plate overlapping portions 22. As described above, the intermediate portion 23 is interposed between the adjacent polarizing plate overlapping portions 22, so that the plurality of polarizing plates 12 are supported by the separator layer 21 at intervals in the arrangement direction.

Also provided is an intermediate polarizing plate 26 that is disposed between the adjacent polarizing plates 12 and carried on the separator layer 21. In this way, the end face on the side of the intermediate polarizing plate 26 in each polarizing plate 12 is protected by the intermediate polarizing plate 26 interposed between the adjacent polarizing plates 12, so that the polarizing plate 12 becomes less susceptible to damage. Yield is further improved.

Further, the overhang portion 25 extends over the entire length of the separator layer 21. In this case, the strength of the separator layer 21 is higher than that in the case where the overhanging portion 25 partially extends from the polarizing plate overlapping portion 22, and this is suitable for improving the yield. It becomes.

Also, a pair of overhang portions 25 are provided in such a manner that the polarizing plate overlapping portion 22 is sandwiched from both sides in the orthogonal direction. In this way, the polarizing plate 12 is more reliably protected by the pair of overhang portions 25, and the polarizing plate 12 is less likely to be damaged.

In addition, the method for manufacturing the liquid crystal panel (display panel) 11 according to the present embodiment is a method for manufacturing the liquid crystal panel 11 using the above-described coupled polarizing plate 20, and a liquid crystal for manufacturing a plurality of liquid crystal panel bodies 11B. A panel body manufacturing process, and a polarizing plate pasting process of pasting together the plurality of polarizing plates 12 provided in the coupled polarizing plate 20 to the plurality of liquid crystal panel bodies 11B. According to such a manufacturing method of the liquid crystal panel 11, after the liquid crystal panel main body 11B is manufactured through the liquid crystal panel main body manufacturing process, the coupled polarizing plate 20 is applied to the liquid crystal panel main body 11B in the polarizing plate attaching process. A plurality of polarizing plates 12 provided in the are attached together. In addition to improving the yield of the plurality of polarizing plates 12 provided in the coupled polarizing plate 20, the plurality of polarizing plates 12 are collectively attached to the plurality of liquid crystal panel bodies 11B, thereby reducing production costs, etc. This is suitable for the purpose.

<Embodiment 2>
A second embodiment of the present invention will be described with reference to FIG. 10 or FIG. In this Embodiment 2, what changed the installation number of the overhang | projection part 125 is shown. In addition, the overlapping description about the same structure, operation | movement, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.

As shown in FIGS. 10 and 11, the coupled polarizing plate 120 according to the present embodiment has an overhanging portion 125 only on one end side in the Y-axis direction (orthogonal direction). Specifically, the overhanging portion 125 protrudes from the respective polarizing plate overlapping portions 122, the respective intermediate portions, and the respective positioning portions 124 to the outside of one side (the upper side shown in FIG. 10 and the left side shown in FIG. 11). One is provided in the form. The overhanging portion 125 is arranged so as to protrude outward from one end in the Y-axis direction with respect to each polarizing plate 112 and each intermediate polarizing plate 126 carried on the separator layer 121. This makes it difficult for another member to interfere with one end of the polarizing plate 112 in the Y-axis direction when the coupled polarizing plate 120 is transported. The occurrence of damage such as micro cracks is suppressed. Accordingly, the yield of the coupled polarizing plate 120 can be improved.

<Embodiment 3>
A third embodiment of the present invention will be described with reference to FIG. In this Embodiment 3, what changed the planar shape of the polarizing plate 212 from above-mentioned Embodiment 1 is shown. In addition, the overlapping description about the same structure, operation | movement, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.

As shown in FIG. 12, the polarizing plate 212 according to the present embodiment has a vertically long planar shape and rounded corners 212CN. Specifically, each corner portion 212CN arranged at the four corners of the polarizing plate 212 has an arc shape with a constant radius of curvature (for example, in the range of 0.5 mm to 1 mm) when seen in a plane, and the central angle is about It is about 90 °. In this way, stress concentration is less likely to occur at each corner 212CN of the polarizing plate 212, and therefore damage to the polarizing plate 212 is less likely to occur. Further, as the planar shape of the polarizing plate 212 is changed as described above, the intermediate polarizing plate 226 has a trumpet shape (protruding shape) at both ends in the Y-axis direction.

As described above, according to the present embodiment, the plurality of polarizing plates 212 have a planar shape of a polygon and a corner 212CN having a rounded shape. In this way, stress concentration is unlikely to occur in the corner portion 212CN of the polarizing plate 212 having a polygonal planar shape, so that damage or the like is less likely to occur in the polarizing plate 212.

<Embodiment 4>
A fourth embodiment of the present invention will be described with reference to FIG. 13 or FIG. In the fourth embodiment, the intermediate polarizing plate is omitted from the third embodiment. In addition, the overlapping description about the same structure, effect | action, and effect as above-mentioned Embodiment 3 is abbreviate | omitted.

As shown in FIGS. 13 and 14, the coupled polarizing plate 320 according to the present embodiment is as described in the first to third embodiments between the polarizing plates 312 adjacent to each other in the X-axis direction (alignment direction). The intermediate polarizing plate is not interposed. Accordingly, a space corresponding to the width of the intermediate portion 323 of the separator layer 321 is provided between the polarizing plates 312 adjacent in the X-axis direction. The intermediate portion 323 is exposed to the front side without being covered by the intermediate polarizing plate.

<Embodiment 5>
Embodiment 5 of the present invention will be described with reference to FIG. In the fifth embodiment, the projecting portion is omitted from the first embodiment. In addition, the overlapping description about the same structure, operation | movement, and effect as above-mentioned Embodiment 1 is abbreviate | omitted.

As shown in FIG. 15, the coupled polarizing plate 420 according to the present embodiment is not provided with a protruding portion as described in the first to fourth embodiments on the separator layer 421 extending in a strip shape. In addition, each corner 412CN of the polarizing plate 412 whose plane shape is a vertically long rectangular shape is rounded. Specifically, each corner 412CN arranged at the four corners of the polarizing plate 412 has an arc shape with a constant radius of curvature (for example, in the range of 0.5 mm to 1 mm) when viewed in a plane, and the central angle is about It is about 90 °. In this way, when the coupled polarizing plate 420 is transported, even if other members interfere with both ends of the polarizing plate 412 in the Y-axis direction, stress concentration occurs at each corner 412CN of the four corners of the polarizing plate 412. Since it is difficult to occur, the polarizing plate 412 is difficult to be damaged such as a minute crack. Accordingly, the yield of the coupled polarizing plate 420 can be improved. Further, as the planar shape of the polarizing plate 412 is changed as described above, both ends of the intermediate polarizing plate 426 in the Y-axis direction have a trumpet shape (protruding shape).

As described above, the coupled polarizing plate 420 according to the present embodiment includes a separator layer 421 extending in a strip shape and a plurality of polarizing plates supported on the separator layer 421 along the extending direction of the separator layer 421. 412 and a plurality of polarizing plates 412 having a polygonal planar shape and rounded corners 412CN.

In this way, since the plurality of polarizing plates 412 are supported by the separator layer 421 extending in a strip shape, the plurality of polarizing plates 412 can be transported or pasted together. Therefore, it is not necessary to cut off the polarizing plate using a blade after pasting the polarizing plate as in the prior art, which is excellent in productivity. Here, when the coupled polarizing plate 420 is transported, there is a concern that another member or the like may interfere with the vicinity of the corner 412CN of the plurality of polarizing plates 412 having a polygonal planar shape. If this occurs, the polarizing plate 412 may be damaged. In that respect, since the plurality of polarizing plates 412 have a rounded corner 412CN, stress concentration on the corner 412CN is alleviated even if other members interfere with each other. Thereby, damage or the like hardly occurs in the polarizing plate 412, so that the yield can be improved.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In addition to the above embodiments, as shown in FIG. 16, an arrangement in which a plurality of polarizing plates 12-1 are arranged adjacent to each other along the X-axis direction, that is, an “intermediate portion and an intermediate polarizing plate” Alternatively, the coupled polarizing plate 20-1 may be omitted. The polarizing plate overlapping portions (not shown) are also arranged adjacent to each other along the X-axis direction in the same manner as the polarizing plate 12-1.
(2) In each of the above-described embodiments, the case where the overhanging portion is provided in a form extending over the entire length of the separator layer is shown, but the overhanging portion is partially provided in the extending direction of the separator layer. It doesn't matter. Even in such a case, it is preferable that the projecting portion is provided so as to project outward in the orthogonal direction from each polarizing plate overlapping portion that overlaps at least each polarizing plate to be protected. In this case, the overhanging portion may not be connected to some or all of the intermediate portions, or the overhanging portion may not be connected to some or all of the positioning portions. Absent.
(3) Besides the above-described embodiments, the specific planar shape of the polarizing plate (polarizing plate overlapping portion) constituting the coupled polarizing plate can be appropriately changed. Specifically, the planar shape of the polarizing plate is a circular shape, an elliptical shape, a circular or elliptical shape with a part cut away, a horizontally long rectangular shape, a square shape, a trapezoidal shape, a parallelogram shape, a rhombus shape, and a triangular shape. Alternatively, it may be a pentagon or more polygonal shape. Further, the planar shapes of the intermediate polarizing plate (intermediate part), the positioning part, and the positioning hole can be appropriately changed. Furthermore, the planar arrangement of the positioning holes in the positioning portion can be changed as appropriate.
(4) The configurations described in the second embodiment can be combined with the configurations described in the third and fourth embodiments and the other embodiment (1).
(5) The configuration described in the third embodiment can be combined with the configuration described in the other embodiment (1).
(6) It is also possible to combine each structure described in Embodiment 5 and other Embodiment (1) with the structure described in Embodiment 4 described above.
(7) The configuration described in the fifth embodiment can be combined with the configuration described in the other embodiment (1).
(8) Besides the above-described embodiments, the number of polarizing plates (polarizing plate overlapping portions) constituting the coupled polarizing plate can be changed as appropriate. Similarly, in addition to the above-described embodiments, the number of intermediate portions (intermediate polarizing plates) constituting the coupled polarizing plate, the number of positioning portions, the number of positioning holes, and the like can be appropriately changed. Further, a plurality of positioning holes may be formed in one positioning portion.
(9) Besides the above-described embodiments, specific numerical values such as the dimensions of each side of the coupled polarizing plate and the dimensions of each side of each polarizing plate constituting the coupled polarizing plate can be appropriately changed. is there.
(10) In each of the above-described embodiments, the case where the positioning hole is formed through the positioning portion is shown. However, for example, the positioning portion is made transparent, and a mark (indicator portion) serving as a positioning index with respect to the polarizing plate alignment mark ) May be provided.
(11) In each of the above-described embodiments, the polarizing plate base material attached to the separator layer in the coupled polarizing plate manufacturing process is cut to separate each polarizing plate. The polarizing plate may be manufactured separately, and the polarizing plate manufacturing process may be performed by attaching the polarizing plates to the separator layer.
(12) In each of the above-described embodiments, the liquid crystal panel color filter is exemplified by a three-color configuration of red, green, and blue. However, a yellow colored portion is added to each colored portion of red, green, and blue. In addition, the present invention can also be applied to a color filter having a four-color configuration.
(13) In each of the above embodiments, a liquid crystal panel that is classified as ultra-small and has a screen size of 1 inch or less is exemplified. However, the screen size is, for example, 1 inch or more, and is small, medium, large, or ultra-large. The present invention can also be applied to liquid crystal panels that are classified. In that case, the liquid crystal panel can be used for portable electronic devices such as smartphones and tablet laptop computers, television receivers, electronic signboards (digital signage), electronic blackboards, and other electronic devices.
(14) In each of the above embodiments, a liquid crystal panel having a configuration in which a liquid crystal layer is sandwiched between a pair of substrates has been exemplified. However, a display panel in which functional organic molecules other than a liquid crystal material are sandwiched between a pair of substrates. The present invention is also applicable to.
(15) In each of the embodiments described above, the TFT is used as the switching element of the liquid crystal panel. However, the present invention can be applied to a liquid crystal panel using a switching element other than the TFT (for example, a thin film diode (TFD)), and performs color display. In addition to the liquid crystal panel, the present invention can also be applied to a liquid crystal panel that displays black and white.
(16) In each of the above-described embodiments, the liquid crystal panel is exemplified as the display panel. However, the present invention can be applied to other types of display panels (organic EL panel, EPD (electrophoretic display panel), etc.).

11 ... Liquid crystal panel (display panel), 11B ... Liquid crystal panel body (display panel body), 12, 12-1, 112, 212, 312, 412 ... Polarizing plate, 12CN, 112CN, 212CN, 412CN ... Corner, 20, 20-1, 120, 320, 420 ... Coupled polarizing plate, 21, 121, 321, 421 ... Separator layer (polarizing plate carrier), 22, 122 ... Polarized light Plate overlapping portion, 23,323 ... intermediate portion, 25,125 ... overhang portion, 26,126,226,426 ... intermediate polarizing plate

Claims

A plurality of polarizing plates arranged in rows,
A polarizing plate carrier that extends along the alignment direction of the plurality of polarizing plates and carries the plurality of polarizing plates, and a polarizing plate overlapping portion that overlaps the plurality of polarizing plates, and the polarizing plate overlap A polarizing plate comprising: a polarizing plate carrier having at least a projecting portion projecting from the portion in an orthogonal direction perpendicular to the arrangement direction.
A plurality of the polarizing plate overlapping portions are arranged side by side with an interval along the arrangement direction,
The coupled polarizing plate according to claim 1, wherein the polarizing plate carrier has an intermediate portion interposed between adjacent polarizing plate overlapping portions.
The coupled polarizing plate according to claim 2, further comprising an intermediate polarizing plate disposed between the adjacent polarizing plates and supported on the polarizing plate carrier.
The coupled polarizing plate according to any one of claims 1 to 3, wherein the overhanging portion extends over the entire length of the polarizing plate carrier.
5. The coupled polarizing plate according to claim 1, wherein a pair of the projecting portions are provided so as to sandwich the polarizing plate overlapping portion from both sides in the orthogonal direction.
The coupled polarizing plate according to any one of claims 1 to 5, wherein the plurality of polarizing plates have a polygonal planar shape and rounded corners.
A polarizing plate carrier extending in a band shape;
A plurality of polarizing plates carried on the polarizing plate carrier along the extending direction of the polarizing plate carrier, wherein the planar shape is a polygonal shape and the corners are rounded. And a polarizing plate.
A manufacturing method of a display panel using the coupled polarizing plate according to any one of claims 1 to 7,
A display panel body manufacturing process for manufacturing a plurality of display panel bodies,
A polarizing plate pasting step of collectively pasting the plurality of polarizing plates provided in the coupled polarizing plate to the plurality of display panel main bodies.