JP2004212498A - Manufacturing method for liquid crystal display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To clearly segment a corner part along the specified virtual segmentation line without leaving any flash from a polygonal liquid crystal display panel (a source panel) to obtain an irregular shaped liquid crystal display panel. <P>SOLUTION: In fabricating the quadrangular source panel 10A, a periphery sealant 13 to bond a pair of panel substrates together is arranged along an outline of the irregular shaped liquid crystal display panel 10 to be obtained, and at the same time, on the corner part 20 side to be segmentized, a dummy sealant 31 containing a main seal part 311 parallel to the virtual segmentation line L and two sub-seal parts 312, 313 on the corner part 20 respectively along two adjacent edges 20a, 20b and in parallel thereto is arranged. In segmentizing the corner part 20 along the virtual segmentation line L, the end parts 312a, 313a of the respective sub-seal parts 312, 313 are extended to at least positions where they intersect the virtual segmentation line L. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for manufacturing a liquid crystal display panel, and more particularly, to a technique for manufacturing a liquid crystal display panel that obtains an odd-shaped liquid crystal display panel by dividing a corner portion from a polygonal liquid crystal display panel.
[0002]
[Prior art]
Generally, a liquid crystal display panel is manufactured as a quadrangle and is incorporated in various products as a display device. In a liquid crystal display panel applied to a speedometer of an automobile, for example, as shown in FIG. In some cases, a liquid crystal display panel 10 having an irregular shape (in this case, a deformed hexagon) in which two corner portions are cut off is required.
[0003]
In an actual production process, usually, a plurality of liquid crystal display panels are formed on a mother substrate in an arrangement of m rows × n columns, and then, as a stick substrate for taking out a liquid crystal injection port from the mother substrate, a row unit or a column unit. Injection of liquid crystal and sealing of the liquid crystal injection port are performed in the state of the stick substrate, and thereafter, individual panels are cut out of the stick substrate in a square shape.
[0004]
In the case of the odd-shaped liquid crystal display panel 10, instead of being cut directly from the mother substrate or the stick substrate, a rectangular liquid crystal display panel manufactured by following the above steps is manufactured as an original panel. FIG. 4A shows a plan view of the original panel 10A. 4B is a sectional view taken along line BB of FIG. 4A, and FIG. 4C is a sectional view taken along line CC of FIG. 4A.
[0005]
As in this example, two adjacent corner portions 20 from the original panel 10A are divided into triangular shapes along the dividing virtual line L to obtain a deformed hexagonal deformed liquid crystal display panel 10, and the original panel 10A is provided with In order to bond the pair of panel substrates (transparent electrode substrates) 11 and 12, the panel substrates 11 and 12 are also bonded to each corner portion 20 in addition to the peripheral sealing material 13 provided around the display portion. Sealing material 21 is provided.
[0006]
The peripheral sealing material 13 and the dummy sealing material 21 are both applied to one of the panel substrates 11 and 12 at the stage of the mother substrate. The coating is applied along the outer shape of the panel 10, that is, around the display portion, and the dummy seal material 21 is also applied along the outer shape of the corner portion 20 to be divided.
[0007]
That is, as shown in an enlarged manner in FIG. 5, the dummy seal material 21 includes a main seal portion 211 parallel to the virtual dividing line L and two sub seal portions 212 parallel to two adjacent sides of the corner portion 20. , 213 are applied in a triangular shape.
[0008]
The reason why the dummy sealing material 21 is provided in the corner portion 20 that is finally divided is that the corner portion 20 is not removed from the mother substrate through the stick substrate until the individual original panels 10A are obtained, particularly when the substrate is cut out. This is because the corner part 20 can be completed in one operation by holding it integrally as a part of the panel 10A.
[0009]
Here, the dividing means, as shown in FIG. 4C, after a V-shaped cut groove 22 having a predetermined depth is formed in the panel substrates 11 and 12 along a virtual dividing line L by a roll cutter or the like. This means that a bending force is applied to the cut groove 22 to break the two panel substrates 11 and 12 integrally bonded by the dummy seal material 21.
[0010]
[Problems to be solved by the invention]
According to this, the corner portion 20 can be quickly separated from the original panel 10A in a short time as compared with a case where both panel substrates 11 and 12 are completely cut in the thickness direction by a dicer. There is such a problem.
[0011]
That is, the main seal portion 211 of the dummy seal material 21 is parallel to the hypotenuse portion 131 along the dividing virtual line L of the opposing peripheral seal material 13, but is shorter than the hypotenuse portion 131. As shown, a non-seal portion where the dummy seal material 21 does not exist is formed at the end of the virtual dividing line L.
[0012]
In the non-seal portion S, since the panel substrate 11 and the panel substrate 12 are not connected by a sealing material, it is assumed that a bending force is applied from the panel substrate 11 side. As a result, the burrs 23 may remain in the non-seal portion S as shown in FIG.
[0013]
This type of burr 23 may be harmful to other components in the subsequent steps, particularly when the panel substrates 11 and 12 are glass substrates, and therefore must be removed by polishing. Of course, the polishing of the cross section is performed irrespective of the presence or absence of burrs, but the polishing time without burrs is about 10 seconds per cell, whereas when there is burrs, it is 60 to 120 per cell. It took seconds, which led to a drop in productivity.
[0014]
As a method of preventing the generation of the burrs 23, a method of increasing the length of the main seal portion 211 of the dummy seal material 21 so as not to form the above-described non-sealed portion S can be considered.
[0015]
However, according to this method, the end of the main seal portion 211 is located near the outline of the original panel 10A, so that when the stick substrate is cut out from the mother substrate and / or when the individual original panel 10A is cut from the stick substrate. This may not be preferable because it may cause trouble when cutting out the image.
[0016]
Therefore, an object of the present invention is to provide a conventional liquid crystal display panel by dividing a corner portion sandwiched between two adjacent sides along a predetermined virtual dividing line from a polygonal liquid crystal display panel. An object of the present invention is to make it possible to divide a corner portion neatly without leaving burrs along an imaginary dividing line without changing a process or a work procedure at all.
[0017]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention provides a liquid crystal display panel having an irregular shape by dividing a corner portion sandwiched between two adjacent sides along a predetermined dividing virtual line from a polygonal liquid crystal display panel (original panel). In obtaining the panel, a peripheral sealing material for bonding a pair of panel substrates is provided along the outer shape of the odd-shaped liquid crystal display panel when the polygonal liquid crystal display panel is manufactured, and the divided corner portion side is formed. A dummy seal material including a main seal portion parallel to the virtual dividing line and two sub-seal portions parallel to the two adjacent sides is provided, and the corner portion is divided into the virtual virtual line. In the method for manufacturing a liquid crystal display panel that is divided along a line, each end of the two sub-sealing portions is extended to at least a position that intersects the virtual dividing line. .
[0018]
According to this configuration, at both ends of the virtual dividing line, the panel substrates are integrally connected via the respective sub-seal portions, so that the corner portion is finely divided along the virtual dividing line without causing burrs. be able to.
[0019]
In addition, even if one end of each sub-seal portion is extended as described above, no trouble occurs when cutting out the stick substrate from the mother substrate and / or when cutting out the individual original panels from the stick substrate.
[0020]
Further, by further extending each end of the sub-seal portion and connecting it to the peripheral sealing material, it is possible to more reliably prevent the generation of burrs. Further, it is preferable that the width of the sub-seal portion is set to 0.1 to 0.2 mm as the end of the sub-seal portion is extended to a position intersecting the virtual dividing line.
[0021]
That is, if the thickness is less than 0.1 mm, the bonding strength between the panel substrates is weak, and there is a possibility that the panel substrates cannot be divided as one. On the other hand, if it exceeds 0.2 mm, both ends of the virtual imaginary line become harder than the other parts, and it becomes difficult to divide the line, which is not preferable.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In this embodiment, similarly to the conventional example described above, two adjacent corner portions 20 are separated from the square base panel 10A shown in FIG. This is a case where a (square) liquid crystal display panel 10 is manufactured.
[0023]
FIG. 1 schematically shows an enlarged plan view of one corner portion 20 divided along the virtual dividing line L. The other corner portion 20 has the same configuration, and for the configuration other than the corner portion 20, refer to FIGS.
[0024]
Also in the present invention, a dummy seal material 31 for bonding the panel substrates 11 and 12 (see FIG. 4C) at the corner portion 20 is provided in the corner portion 20. The dummy seal material 31 may be, for example, an epoxy-based thermosetting synthetic resin, like the peripheral seal material 13 provided in the odd-shaped liquid crystal display panel 10 (see FIG. 3).
[0025]
In the dummy seal material 31, a main seal portion 311 arranged in parallel along the virtual dividing line L and a second seal portion arranged in parallel along one side 20a of two adjacent sides sandwiching the corner portion 20 are provided. One sub-seal portion 312 and a second sub-seal portion 313 arranged in parallel along the other side 20b are included.
[0026]
Also in the present invention, the main seal portion 311 is shorter than the oblique side portion 131 of the peripheral sealing member 13 facing the same as the main seal portion 211 in the conventional example described above.
[0027]
Therefore, between one end of the main seal portion 311 and one side 20a of the corner portion 20 and between the other end of the main seal portion 311 and the other side 20b of the corner portion 20, that is, a divided virtual line. Both ends of L are non-seal portions.
[0028]
In order to prevent the occurrence of burrs in the non-sealed portion at the time of division, in the present invention, one end portions 312a and 313a of the first sub-sealed portion 312 and the second sub-sealed portion 313 are extended into the non-sealed portion. , And intersect with the virtual dividing line L.
[0029]
As a result, at both ends of the virtual dividing line L, the panel substrates 11 and 12 are integrally connected via the respective sub-sealing portions 312 and 313. Therefore, when cutting the corner portion 20 by inserting the cut groove 22 (see FIG. 4 (c)) along the dividing virtual line L, as shown in FIG. it can.
[0030]
Since each of the sub-sealing portions 312 and 313 is parallel to each of the sides 20a and 20b of the corner portion 20, even if the respective one end portions 312a and 313a are extended so as to intersect with the dividing virtual line L, the outer shape of the original panel 10A Since it does not approach the line, there is no problem when cutting out the stick substrate from the mother substrate and / or when cutting out individual original panels from the stick substrate.
[0031]
Further, the one end portions 312a and 313a of the sub-sealing portions 312 and 313 may be further extended and connected to the peripheral sealing material 13, whereby the occurrence of burrs at the time of division can be more reliably prevented. The width of the main seal portion 311 may be arbitrarily selected, but the width of the sub seal portion is preferably 0.1 to 0.2 mm.
[0032]
That is, if the thickness is less than 0.1 mm, the bonding force between the panel substrates 11 and 12 is weak, and there is a possibility that the panel substrates 11 and 12 cannot be separated as one. On the other hand, if it exceeds 0.2 mm, both ends of the virtual dividing line L are harder than other parts, and it is difficult to divide the line, which is not preferable.
[0033]
In the example of FIG. 1, the other end portions 312b and 313b of the sub-seal portions 312 and 313 are separated from each other, but may be connected. Further, one end of the main seal portion 311 may be connected to the sub seal portion 312, and the other end may be connected to the sub seal portion 313.
[0034]
The virtual dividing line L does not necessarily have to be a straight line. As an example, the dividing virtual line L may be an arc shape. Further, the shape of the odd-shaped liquid crystal display panel to be manufactured is not limited to the modified hexagon of the above embodiment.
[0035]
【The invention's effect】
As described above, according to the present invention, when a corner portion is cut along a predetermined dividing virtual line from a polygonal liquid crystal display panel (original panel) to obtain an odd-shaped liquid crystal display panel, At the time of manufacturing, a peripheral sealing material for bonding a pair of panel substrates is arranged along the outer shape of the odd-shaped liquid crystal display panel to be obtained, and a main part parallel to the virtual dividing line is provided on the corner part to be divided. A method of manufacturing a liquid crystal display panel in which a dummy sealing material including a seal portion and two sub-seal portions parallel to each other along two sides adjacent to the corner portion is provided, and the corner portion is divided along a virtual dividing line. In the above, by extending one end side of each of the two sub-seal portions to at least a position intersecting with the dividing virtual line, without changing the conventional process or work procedure at all. The Na portion along section imaginary line can be cleanly separated without leaving burrs. In addition, this makes it possible to reduce the polishing time of the partial section.
[Brief description of the drawings]
FIG. 1 is an enlarged plan view schematically showing one corner portion cut off from an original panel according to an embodiment of the present invention.
FIG. 2 is an enlarged plan view showing a section taken after a corner of FIG. 1 is cut.
FIG. 3 is a plan view showing a modified hexagonal liquid crystal display panel as an example of a variant.
FIG. 4A is a plan view showing a conventional base panel (square liquid crystal display panel) used for manufacturing a modified liquid crystal display panel, FIG. 4B is a sectional view taken along line BB in FIG. The sectional view on the CC line in the same top view.
FIG. 5 is an enlarged plan view schematically showing a corner portion separated from the conventional base panel.
FIG. 6 is an enlarged plan view showing a section taken after the corner of FIG. 5 has been sectioned;
[Explanation of symbols]
10 odd shaped liquid crystal display panel 10A square shaped liquid crystal display panel (former panel)
11, 12 Panel substrate 13 Peripheral seal material 14 Spacer 20 Corner portion 22 Cut groove (half cut groove)
31 Dummy seal material 311 Main seal parts 312, 313 Sub seal part L Divided virtual line

Claims (3)

In obtaining a liquid crystal display panel having a different shape by dividing a corner portion sandwiched between two adjacent sides from a polygonal liquid crystal display panel along a predetermined virtual dividing line, the manufacturing method of the polygonal liquid crystal display panel is described. A peripheral sealing material for bonding a pair of panel substrates is provided along the outer shape of the odd-shaped liquid crystal display panel, and a main seal portion parallel to the virtual dividing line is provided on the corner portion to be divided, A method of manufacturing a liquid crystal display panel, comprising: arranging a dummy seal material including two parallel sub-seal portions along two adjacent sides to divide the corner portion along the virtual dividing line.
A method of manufacturing a liquid crystal display panel, wherein one end of each of the two sub-sealing portions is extended to at least a position intersecting the virtual dividing line. 2. The method according to claim 1, wherein one end of each of the two sub-sealing portions is further extended and connected to the peripheral sealing material. 3. The method according to claim 1, wherein the width of each of the two sub-sealing portions is 0.1 to 0.2 mm.

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