JPH06281818A - Polarizing plate labeler and its manufacture - Google Patents

Abstract

PURPOSE:To reduce the trouble and the cost of manufacture by manufacturing the polarizing plate labeler by utilizing a peeling layer which exist originally in a raw sheet of a polarizing plate. CONSTITUTION:The polarizing plate labeler 4 is provided with a series of peeling strips 2 being in series, in which each end part is connected to each other by adhesive strip 31, and plural polarizing plate elements 33 fixed to this series of peeling strips 2 so as to be peelable along its longitudinal direction, and constituted so that each polarizing plate element 33 is covered with a protective layer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a modified plate labeler in which a plurality of polarizing plate elements are detachably fixed to a peeling tape in order to sequentially supply polarizing plates to be attached to a liquid crystal panel, and a manufacturing method thereof.

[0002]

2. Description of the Related Art Generally, in a liquid crystal display device, a liquid crystal panel is arranged between a pair of polarizing plate elements, and by cooperation of both polarizing plate elements and the liquid crystal panel, By allowing or blocking the transmission of light at the selected dot position, the intended image is displayed.

As a method of fixing such a polarizing plate element to each surface of a liquid crystal panel, mainly two types of methods have been conventionally used.

First, in the first conventional method, a polarizing plate chip as shown in FIG. 17 is used. This polarizing plate chip has a single polarizing plate element 61 sandwiched between a protective cover 62 and a release sheet 63, and the size of the polarizing plate element 61 is the same as the size of the liquid crystal panel to which it is fixed. Are set equal.

When the polarizing plate chip having the above structure is attached to the surface of the liquid crystal panel, the release sheet 63 is released, but such a release operation is difficult and troublesome. Therefore, in an actual operation, the peeling sheet 63 is first fixed to a peeling adhesive tape (not shown) having a stronger adhesive force than that, and the polarizing plate chip is forcibly separated from the peeling adhesive tape to remove the peeling sheet 63. Only the sheet 63 is peeled off. As a result, the polarizing plate chip can be fixedly attached to the surface of the liquid crystal panel.

The conventional method using the above-mentioned polarizing plate chip has a drawback that an adhesive tape for peeling is additionally required for attachment to the liquid crystal panel, the cost is increased, and automation of attachment work is difficult. Further, when it is necessary to sequentially attach a plurality of polarizing plate chips, each chip must be handled individually, which causes a problem of low productivity.

On the other hand, in the second conventional method shown in FIG. 18, a plurality of polarizing plate elements 61 'each covered with a protective cover 62' are fixed to a peeling tape 71 'and called a polarizing plate labeler. Things are used. Using such a polarizing labeler eliminates the problem of having to handle the polarizing plate elements 61 'individually.

However, in the above-mentioned conventional polarizing plate labeler, each polarizing plate element 61 'is originally peeled off from its own release sheet (similar to the conventional example shown in FIG. 17) and then fixed to the release tape 71'. Is configured. Therefore, the peeling tape 71 'is an additional element, and an increase in manufacturing cost cannot be avoided. Further, prior to fixing to the peeling tape 71 ', the operation of peeling off the original peeling sheet which originally existed takes time.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a polarizing plate labeler which can be easily fixedly attached to a liquid crystal panel and can be manufactured by utilizing a peeling layer which originally existed in a raw material of a polarizing plate, and a manufacturing thereof. To provide a method.

[0010]

SUMMARY OF THE INVENTION According to a first aspect of the invention, a series of release strips interconnected at their ends by adhesive strips and a series of release strips along their length. A plurality of polarizing plate elements releasably fixed to each other are provided, and each polarizing plate element is covered with a protective layer. In the present invention, the term “strip” refers to a strip having a limited length.

The polarizing plate labeler of the present invention is preferably wound in a roll shape in order to save space and for storage and handling.

In an embodiment of the present invention, each peel strip has a pair of parallel long sides and a pair of parallel short sides, the short sides extending perpendicular to the long sides. . In this case, at least two of the polarizing plate elements may be spaced apart from each other in the longitudinal direction of the strip of strips, the spacings corresponding to defective parts of the polarizing plate element. Alternatively, as an alternative configuration, all the polarizing plate elements may be densely arranged in the longitudinal direction of the series of release strips.

In another embodiment of the present invention, each peel strip has a pair of parallel long sides and a pair of parallel short sides, the short sides being inclined with respect to the long sides. It is extended. In this case, two of the polarizing plate elements adjacent to each connection between the strips are separated from each other in the longitudinal direction of the series of strips.

According to the second aspect of the present invention, a polarizing plate original fabric having a polarizing layer interposed between a protective layer and a peeling layer is prepared, and each of the original fabrics is a plurality of half originals having a predetermined width. Dividing into anti-polarizing plate strips, and connecting the ends of the semi-original anti-polarizing plate strips in series by an adhesive strip fixed to the release layer to form a polarizing plate strip assembly, Defective detection is performed for, at the defective portion, the peeling layer is left and the polarizing layer and the protective layer of the polarizing plate strip series are partially removed.
By half-cutting the polarizing plate strip assembly so as not to reach the peeling layer, the remaining portions of the polarizing layer and the protective layer are divided into a plurality of polarizing plate elements, and the peeling layer holds the peelable layer. A method of manufacturing a polarizing plate labeler including each step is provided.

In the above manufacturing method, the connection between the semi-raw fabric polarizing plate strips is also detected when the defect is detected, and the peeling layer is left at the connection, and the polarizing layer of the polarizing plate strip assembly is left. And a step of partially removing the protective layer may be further included.

According to the third aspect of the present invention, there is prepared a polarizing plate original sheet having a polarizing layer interposed between a protective layer and a peeling layer, and the original sheet is a plurality of half original sheets each having a predetermined width. Dividing into anti-polarizing strips, detecting defects in each of the semi-raw polarizing plates strips, completely removing defective portions of each of the semi-raw polarizing plates strips, so that the semi-raw polarizing plates do not reach the peeling layer. By subjecting the remaining portion of the strip to a half cut, the remaining portions of the polarizing layer and the protective layer are partitioned into a plurality of polarizing plate elements and held in the peeling layer so that they can be peeled off, and the ends of the remaining portions of the polarizing plate strips are separated from each other. There is provided a method of manufacturing a polarizing plate labeler, comprising steps of forming a polarizing plate strip assembly by connecting in series with an adhesive strip secured to the release layer.

In both the second and third manufacturing methods, it is preferable to further include a step of winding the polarizing plate strip assembly into a roll.

[0018]

[Action and effect]

According to the structure of the polarizing plate labeler in the first aspect of the present invention, the peeling strips are connected in series by the adhesive strips to form a continuous tape. Therefore, the individual peeling strips themselves do not have to be continuous, and the peeling layer originally present in the original sheet of the polarizing plate is used for the peeling based on the manufacturing method in the second or third aspect of the present invention. It is possible to obtain a strip. As a result, it is not necessary to peel the release layer of the original sheet of the polarizing plate in advance, and it is not necessary to separately prepare a continuous release tape as a new carrier for the polarizing plate element. And the cost can be reduced.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS.

FIG. 1 shows a polarizing plate material 1 as a starting material for producing a polarizing plate labeler according to a first embodiment of the present invention. The original sheet 1 of polarizing plate includes a polarizing layer 11 having one surface covered with a protective layer 12, and the other surface of the polarizing layer 11 is covered with a peeling layer 13.
The original polarizing plate 1 may be rectangular or square.

In manufacturing a polarizing plate labeler,
A plurality of the above-mentioned original sheets 1 of the polarizing plate are prepared, stacked on a stocker (not shown), and are sequentially supplied to a cutting unit (not shown) one by one. In the cutting unit, as shown in FIG. 2, each original sheet of polarizing plate is cut at a plurality of locations perpendicularly to two opposing sides of the original sheet (that is, parallel to the remaining two sides), and the original sheet of polarizing plate is cut. Divide into a plurality of semi-raw polarizing plate strips 2. The width of each polarizing plate strip 2 corresponds to the width of a liquid crystal panel (not shown) to which a polarizing plate element as a product is to be fixed. In this case, if the split polarizing plate strip is not wide enough (usually the last split strip), it will be discarded.

Next, as shown in FIG. 3, the thus obtained semi-raw fabric polarizing plate strip 2 is abutted at its ends and connected in series by an adhesive strip 31,
The half original fabric polarizing plate strip assembly 3 is used.

Next, as shown in FIG. 4, a defective portion 32 is detected and a mark is made in the half original fabric polarizing plate strip assembly 3.

Next, as also shown in FIG. 4, half-cuts 34 are applied to the polarizing plate strip assembly 3 to separate defective portions 32 from non-defective polarizing plate elements 33. Each half-cut 34 penetrates only the polarizing layer 11 and the protective layer 12 while leaving the peeling layer 13, thereby preventing the polarizing plate strip assembly 3 from being completely divided.
The length of each non-defective polarizing plate element 33, that is, the interval between two adjacent half cuts 34 corresponds to the length of the liquid crystal panel.

Then, as shown in FIG. 5, the polarizing layer 11 and the protective layer 12 in the polarizing plate strip assembly 3 are partially removed only at the defective portion 32 (reference numeral 32a in FIG. 5).
Indicates a defect after removal). As a result, the polarizing plate labeler 4 carrying only the non-defective polarizing plate element 33 is obtained.

Finally, as shown in FIG. 6, the polarizing plate labeler 4 is wound on a reel (not shown) with a predetermined torque,
Roll 5 The roll 5 of the polarizing plate labeler thus obtained can be used to conveniently and securely attach polarizing plate elements to a liquid crystal panel.

FIG. 7 is a flowchart of the manufacturing method described above. In the same flowchart, in step 41, a plurality of polarizer original fabrics 1 (FIG. 1) are stacked, and in step 42, each polarizer original fabric 1 is divided into a plurality of semi-raw fabric polarizer strips 2 (FIG. 2). In step 43, the semi-original fabric polarizing plate strips 2 are connected in series (FIG. 3), and in step 44, the defective portion 32 is detected / marked in the polarizing plate strip assembly 3 (FIG. 4). In steps 45a and 45b, the polarizing plate strip assembly 3 is half-cut to divide the defective portion 32 and the non-defective polarizing plate element 33 (FIG. 4), and in step 46, the defective portion 32 is removed from the peeling layer 13 and non-defective polarization is performed. A polarizing plate labeler 4 carrying only the plate element 33 is obtained (FIG. 5). Finally, in step 47, the polarizing plate labeler 4 is wound around the roll 5.

According to the manufacturing method described above, the semi-raw fabric polarizing plate strips 2 (FIG. 2) are connected in series by using the release layer 13 which was originally present in the raw fabric sheet 1 (FIG. 1). You can Therefore, it is not necessary to separate the non-defective polarizing plate elements 33 from the original release layer 13 and fix them to a separate continuous release tape. As a result, it becomes possible to manufacture the polarizing plate labeler faster and cheaper than ever before.

8 to 10 show a method of manufacturing a polarizing plate labeler according to a second embodiment of the present invention. In the method of the second embodiment, up to step 42 (FIG. 10) of dividing the original polarizing plate 1 into a plurality of half original polarizing plate strips 2 (FIG. 8),
This is substantially the same as the first embodiment.

However, in the second embodiment, subsequent to step 42, step 44 'for detecting and marking the defective portion 32 on each half-raw polarizing plate strip 2 is performed.
Is carried out (see also FIG. 8).

Then, in step 45a ', the defective portion 32
All cuts 34 ′ are made on both sides of the defective portion 32 in the half original fabric polarizing plate strip 2 including. Further, as shown by the arrow A in FIG. 8, the defective portion 32 that has been completely cut in step 46 ′ is discarded.

On the other hand, in step 45b, as shown in FIG. 8 as well, half-cuts 34 are applied to each half-raw polarizing plate strip 2 and (or a shorter polarizing plate strip piece produced by removing all cuts of the defective portion 32). The non-defective polarizing plate element 33 is classified.

Then, in step 43 ', as shown in FIG. 9, each half-raw polarizing plate strip 2 (or defective portion 3).
Shorter polarizing plate strip pieces produced by removing all cuts of 2) but end-to-end, and adhesive strip 3
1 to connect in series. As a result, non-defective polarizing plate element 3
A polarizing plate labeler 4 ′ carrying 3 in a peelable manner is obtained.

Also in the second embodiment described above, the original sheet 1 for the polarizing plate is used.
Since the peeling layer 13 originally present in (see FIG. 1) is used, the polarizing plate labeler 4'has the same advantages as those of the first embodiment. Further, in the second embodiment, the respective polarizing plate elements 33 are held in close proximity to each other without a substantial space therebetween, so that not only the number of polarizing plate elements per unit length can be increased. In order to fix and attach the liquid crystal panel (not shown), it is advantageous to sequentially supply the polarizing plate elements because it becomes simpler.

In any of the above embodiments, the original polarizing plate 1 is divided into semi-original polarizing plate strips 2 by making all the cuts perpendicular to the two opposite sides of the original fabric. Such a cutting direction is adopted when the polarization axis angle required for each polarizing plate element is 0 ° or 180 °. However, depending on the application field, it may be necessary to use a polarizing plate element in which the polarization axis is inclined at a predetermined angle (for example, 45 ° or 135 °).

FIGS. 11 to 16 show a third embodiment which is particularly suitable when it is necessary for each polarizing plate element to have a tilted polarization axis.
An example is shown. In this embodiment, as shown in FIG. 11, it is preferable to use a long polarizing plate raw material 1 ″ as a starting material. Although not specifically shown, this long polarizing raw material plate 1 is used. "Has a three-layer structure in which a polarizing layer is interposed between a protective layer and a peeling layer (see FIG. 1).

In FIG. 16 which is a flow chart showing the manufacturing method according to the third embodiment, in step 41, a plurality of elongated polarizing plate originals 1 ″ are stacked on a stocker (not shown) and a cutting unit ( (Not shown) are sequentially supplied.

At step 42, as shown in FIG.
Each of the polarizing plate originals 1 ″ is fully cut at a plurality of locations at an angle X with respect to the long side of the original, and divided into a plurality of parallelogram-shaped semi-original polarizing plate strips 2 ″. The width of each polarizing plate strip 2 "corresponds to the width of the liquid crystal panel (not shown) to which the polarizing plate element as a product is to be fixed, and the inclination angle X is set to, for example, 45 °. Excessive end portions 1a ″ inevitably occur at both ends of the anti-counterpart 1 ″, so it is necessary to discard them. Can be reduced to.

At step 43, as shown in FIG.
The parallelogram-shaped semi-raw polarizing plate strips 2 ″ thus obtained are connected to each other in series by gluing the ends together, and the parallel strip-shaped adhesive strips 31 ″ are also connected. Body 3 ".

In step 44 ", as shown in FIG. 13, a defective portion 32" is detected and a mark is formed in the half original fabric polarizing plate strip assembly 3 ".

In steps 45a "and 45b",
Similarly, as shown in FIG. 13, a series of polarizing plate strips 3 "are subjected to half cuts 34" to separate defective portions 32 ", non-defective polarizing plate elements 33", and connection portions 35 ". Each half cut 34" extends. The direction is perpendicular to the series of polarizing plate strips 3 ", so that each polarizing plate element 3 is
The 3 "polarization axis can be tilted.

Then, in step 46, as shown in FIG. 14, the polarizing layer 11 "and the protective layer 12" in the polarizing plate strip assembly 3 "are partially removed only at the defective portion 32" and the connecting portion 35 ". Yes (reference numeral 32 in FIG. 14)
a "and 35a" indicate a defective portion and a connection portion after the removal, respectively). As a result, a polarizing plate labeler 4 ″ carrying only non-defective polarizing plate elements 33 ″ is obtained.

Finally, at step 47, as shown in FIG. 15, the polarizing plate labeler 4 "is wound around a reel (not shown) with a predetermined torque to form a roll 5". The thus obtained roll 5 ″ of polarizing plate labeler can be used to conveniently and securely attach polarizing plate elements to a liquid crystal panel.

The present invention has been described above based on the embodiments, but the present invention is not limited to these embodiments.
Various modifications are possible. For example, the polarizer labeler 4,
If 4'and 4 "are tape shapes that are relatively short, it is not necessary to wind them in a roll shape.

[Brief description of drawings]

FIG. 1 is a perspective view showing a raw material of a polarizing plate used for manufacturing a polarizing plate labeler according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a plurality of half original fabric polarizing plate strips obtained by dividing the original fabric polarizing plate.

FIG. 3 is a perspective view showing a tape obtained by connecting the half original fabric polarizing plate strips in series.

FIG. 4 is a plan view showing the tape after the defective portion detecting step is completed.

FIG. 5 is a perspective view showing the tape after being half-cut.

FIG. 6 is a perspective view showing a roll obtained by winding the tape.

FIG. 7 is a flowchart showing all steps in a method of manufacturing a polarizing plate labeler according to a first embodiment of the present invention.

FIG. 8 is a perspective view similar to FIG. 2, showing a second embodiment of the present invention.

FIG. 9 is a perspective view similar to FIG. 5, showing a polarizing plate labeler according to the second embodiment.

FIG. 10 is a flowchart showing all steps in a method of manufacturing a polarizing plate labeler according to a second embodiment of the present invention.

FIG. 11 is a plan view showing a raw material of a polarizing plate used in a method for manufacturing a polarizing plate labeler according to a third embodiment of the present invention.

FIG. 12 is a perspective view showing a tape obtained by dividing the raw material polarizing plate of FIG. 11 into a plurality of semi-raw material polarizing plate strips and connecting them in series.

FIG. 13 is a diagram after the step of detecting a defective portion is completed.
3 is a plan view showing the tape of FIG.

FIG. 14 is a perspective view showing the tape of FIG. 11 after being half cut.

FIG. 15 is a perspective view showing a roll obtained by winding the tape of FIG.

FIG. 16 is a flowchart showing all steps of a method of manufacturing a polarizing plate labeler according to the first embodiment of the present invention.

FIG. 17 is a perspective view showing a conventional polarizing plate chip.

FIG. 18 is a perspective view showing a conventional polarizing plate labeler.

[Explanation of symbols]

 1, 1 "original polarizing plate 2, 2" half original polarizing plate strip 3, 3 "series of half original polarizing plate strip 4, 4 ', 4" polarizing plate labeler 5, 5 "roll of polarizing plater 11 polarizing layer 12 Protective layer 13, 13 "Release layer 31, 31" Adhesive strip 32, 32 "Defective part 33, 33" Non-defective polarizing plate element 34, 34 "Half cut 34 'Full cut 35" Connection part

Claims (12)

[Claims] 1. A series of release strips, interconnected at their ends by adhesive strips, and a plurality of polarizing plate elements releasably secured to the series of release strips along their length. A polarizing plate labeler in which each polarizing plate element is covered with a protective layer. 2. The polarizing plate labeler according to claim 1, which is wound in a roll shape. 3. The stripping strip has a pair of parallel long sides and a pair of parallel short sides, the short sides extending perpendicular to the long sides. A polarizing plate labeler according to item 2. 4. A polarizing plate labeler according to claim 1, wherein at least two of said polarizing plate elements are spaced from each other in the longitudinal direction of said series of release strips. 5. A polarizing plate labeler according to claim 1, wherein all said polarizing plate elements are arranged close to each other in the longitudinal direction of said series of release strips. 6. The peeling strip has a pair of parallel long sides and a pair of parallel short sides, and the short sides extend in an inclined shape with respect to the long sides. Alternatively, the polarizing plate labeler according to item 2. 7. The polarizing plate labeler according to claim 6, wherein two of the polarizing plate elements adjacent to each connection between the peeling strips are spaced from each other in the longitudinal direction of the series of peeling strips. . 8. A method of manufacturing a polarizing plate labeler, comprising preparing a polarizing plate original fabric having a polarizing layer interposed between a protective layer and a peeling layer, the original fabric being a plurality of semi-raw fabrics each having a predetermined width. Dividing into anti-polarizing strips, and connecting ends of the semi-raw anti-polarizing strips in series in series by adhesive strips fixed to the release layer to form a series of polarizing strips. For the defective part, the peeling layer is left at the defective part and the polarizing layer and the protective layer of the polarizing plate strip assembly are partially removed, and the polarizing plate strip assembly is half-cut so as not to reach the peeling layer. By making a cut, the remaining portions of the polarizing layer and the protective layer are divided into a plurality of polarizing plate elements and held in the peeling layer so that they can be peeled off. Production method. 9. The method of manufacturing a polarizing plate labeler according to claim 8, further comprising the step of winding the polarizing plate strip assembly into a roll. 10. When detecting the defect, a connection point between the semi-finished polarizing plate strips is also detected, and at the connection point, the peeling layer is left and the polarizing layer and the protective layer of the polarizing plate strip assembly are partially formed. The method for producing a polarizing plate labeler according to claim 8 or 9, wherein the method is carried out selectively. 11. A method for manufacturing a polarizing plate labeler, comprising preparing a polarizing plate original fabric having a polarizing layer interposed between a protective layer and a peeling layer, the original fabric being a plurality of semi-raw fabrics each having a predetermined width. Dividing into anti-polarizing strips, performing defect detection on each of the semi-raw polarizing plates strips, completely removing defective portions of each of the semi-raw polarizing plates strips, so that the semi-raw polarizing plates do not reach the peeling layer. By subjecting the remaining portion of the strip to a half cut, the remaining portions of the polarizing layer and the protective layer are divided into a plurality of polarizing plate elements and held in the peeling layer so that they can be peeled off. A method of manufacturing a polarizing plate labeler, comprising the steps of forming a polarizing plate strip assembly by connecting in series with an adhesive strip fixed to the release layer. 12. The method of manufacturing a polarizing plate labeler according to claim 11, further comprising the step of winding the polarizing plate strip assembly into a roll.