JP4126930B2 - Manufacturing method of liquid crystal display panel - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a film liquid crystal display panel using a film substrate.
[0002]
[Prior art]
In a conventional liquid crystal display panel, a segment-side film substrate and a common-side film substrate, both of which are made of a flexible resin film, are bonded together via a substantially rectangular frame-shaped sealing material, and between the two film substrates inside the sealing material. There is one in which liquid crystal is sealed, one side portion of the segment side film substrate protrudes from the common side film substrate, and a connection terminal is provided on the protruding portion.
[0003]
Next, an example of a conventional method for producing such a film liquid crystal display panel will be described with reference to FIG. 13 and FIG. 14 which is a BB cross-sectional view thereof. 13 and 14, the segment side base film sheet 1 formed by arranging four segment side film substrates in the width direction, and the common side base film formed with four common side film substrates facing each segment side substrate. A manufacturing method is shown in which four liquid crystal display cells are continuously formed by laminating a sheet 2 with a frame-shaped sealing material 3.
[0004]
In this state, the sealing material 3 is composed of a substantially rectangular frame-shaped sealing material main body 3a and a liquid crystal injection port protrusion 3b protruding to some extent from both sides of the liquid crystal injection port 4 formed in the sealing material main body 3a. ing. Slits 5 are formed between both sides of the sealing material row of the common-side base film sheet 2 and each sealing material 3, that is, so as to sandwich each sealing material 3. The length of the slit 5 is a length that protrudes to some extent from the sealing material body 3a of the sealing material 3 to both outer sides. The purpose of providing the slit 5 will be described later.
[0005]
As shown in FIG. 14, a plurality of segment electrodes 6 are provided inside each sealing material 3 of the segment-side base film sheet 1, and an alignment film 7 is provided so as to cover them. Connection terminals 8 are respectively provided in portions of the segment-side base film sheet 1 that are opposed to the slits 5 of the common-side base film sheet 2 outside the seal materials 3. A plurality of common electrodes 9 are provided so as to be orthogonal to the segment electrodes 6 on the inner side of each sealing material 3 of the common-side base film sheet 2, and an alignment film 10 is provided so as to cover them. A spacer 11 is interposed between the alignment films 7 and 10.
[0006]
Then, the two base film sheets 1 and 2 bonded together are cut along predetermined two lines 12 and 13 shown by a one-dot chain line in FIG. 13, and in this example, four liquid crystal cells are juxtaposed. A cut sheet pair is obtained. Here, one line 12 is a straight line that passes between a side of the sealing material 3 opposite to the liquid crystal inlet projection 3 b side of the sealing material body 3 a and an end of the slit 5 on the same side. It is. The other line 13 is a polygonal line passing through the other end of each slit 5 while bypassing each liquid crystal inlet projection 3 b of the sealing material 3.
[0007]
Next, after passing through the liquid crystal injection step and the liquid crystal injection port sealing step while keeping the pair of cut sheet sheets, the portion protruding from the sheet pair end surface of the liquid crystal injection port protrusion 3b is cut. Next, when the segment-side base film sheet 1 is cut along a predetermined line (one side of the slit 5) shown by the one-dot chain line in FIG. 14, four individually separated liquid crystal display panels are obtained.
[0008]
Here, the purpose of providing the slit 5 will be described. As described above, when the segment-side base film sheet 1 is cut along a predetermined line indicated by a dashed line in FIG. 14, four liquid crystal display panels are obtained. In this case, both sides of each sealing material 3 of the common side base film sheet 2 are previously removed due to the presence of the slits 5. Therefore, the segment-side base film sheet 2 is protruded from the common-side substrate of the segment-side substrate without cutting the common-side base film sheet 2 only by cutting the segment-side base film sheet 1 along a predetermined line indicated by a one-dot chain line in FIG. A liquid crystal display panel having a row of terminals 8 on one side is obtained.
[0009]
On the other hand, when the slit 5 is not formed, it is necessary to cut only both sides of each sealing material 3 of the common-side base film sheet 2 in order to form the protruding portion in which the terminal 8 is disposed. The connection terminal 8 provided on the segment-side base film sheet 1 may be damaged or completely cut off. Therefore, the purpose of providing the slit 5 is to eliminate such inconvenience.
[0010]
[Problems to be solved by the invention]
By the way, in the manufacturing method of the said conventional liquid crystal display panel, since the slit 5 is formed only in the common side base film sheet 2, each sheet area of both the base film sheets 1 and 2 changes with the presence or absence of the slit 5. The thermal expansion coefficients of the respective sheets are different from each other, and the extension amount of the common side base film sheet 2 in which the slits 5 are formed becomes smaller than the extension amount of the segment side base film sheet 1 in which the slits are not formed.
[0011]
For this reason, when both the base film sheets 1 and 2 are overlapped via the sealing material 3 and then heat treatment is performed to cure the sealing material 3 and bond the base film sheets 1 and 2 together, the amount of elongation is large. The segment side base film 1 warps so as to protrude toward the common side base film 2. In such a case, there is a problem that not only the post-process is adversely affected but also the gap of the liquid crystal display panel as the final product becomes non-uniform and the display quality is deteriorated.
[0012]
Moreover, as shown in FIG. 15, when the part corresponding to the slit 5 of the segment side base film sheet 1 warps to the slit 5 side, the space | interval in the outer side of the sealing material 3 of both base film sheets 1 and 2 will be sealing material. 3 is narrower than the interval inside 3, so that the sealing material 3 melted by heating may flow toward the outside due to the capillary phenomenon. As a result, the gap of the liquid crystal display panel as the final product becomes non-uniform, and the display Quality deteriorates.
[0013]
Accordingly, an object of the present invention is to provide a manufacturing method capable of efficiently and easily manufacturing a film liquid crystal display panel having a uniform gap without causing warpage of both base film sheets bonded together.
[0014]
[Means for Solving the Problems]
The present invention relates to a liquid crystal display in which a predetermined side portion of a first film substrate out of a first film substrate and a second film substrate bonded through a sealing material is protruded from a second film substrate to form a protrusion. A method of manufacturing a panel,
A first base film sheet having a plurality of first film substrate formation regions corresponding to the first film substrate disposed in parallel with the protruding portion side being adjacent to another adjacent first film substrate formation region; The first film substrate includes a second film substrate forming region corresponding to the second film substrate, and a protruding portion corresponding region adjacent to the second film substrate forming region and corresponding to the protruding portion of the first film substrate. A plurality of second base film sheets each having a composite area corresponding to the formation area and arranged in parallel in the same arrangement as that of the first film substrate formation area; Cut lines that are longer at both ends than the side are formed along at least the sides adjacent to the projecting portion corresponding region among the sides that define the second film substrate forming regions. And a substantially rectangular frame-shaped sealing material body disposed along the periphery of the second film substrate, the first base film sheet and the second base film sheet on which the cut line is formed, A plurality of the sealing materials comprising a liquid crystal injection port formed in the sealing material main body, and a liquid crystal injection port protruding portion protruding from both sides of the liquid crystal injection port toward the substrate end surface, and provided inside the liquid crystal injection port Pasted together so that the first film substrate forming region and the composite region are aligned through the sealing material damming portion. The portion of the bonded first and second base films where the liquid crystal injection port protrusion is formed is protruded toward the substrate end face from the portion corresponding to the side where the liquid crystal injection port of the seal material body is formed. Protrusions of the first and second base film sheets formed by cutting the first and second base films to form protrusions of the first and second base film sheets and forming the liquid crystal inlet protrusions. The tip of the part in contact with the liquid crystal From the liquid crystal inlet projection In the seal material body Injecting liquid crystal, sealing the inlet with the sealing material reaching the sealing material damming portion, The inlet was sealed and bonded together A liquid crystal injection port protrusion along a side defining the first film substrate forming region of the first and second base film sheets Protruding portions of the first and second base film sheets formed with And a plurality of the liquid crystal display panels are obtained.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a plan view of a liquid crystal display panel manufactured by the manufacturing method as one embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG. This liquid crystal display panel has a segment-side film substrate 21 and a common-side film substrate 22 that are both made of a flexible resin film.
[0016]
A plurality of segment electrodes 23 are provided on an inner surface (hereinafter, simply referred to as an inner surface) of the segment side film substrate 21 facing the common side film substrate 22, and an alignment film 24 is provided so as to cover them. A polarizing plate 25 is attached to the outer surface of the segment side film substrate 21.
[0017]
On the other hand, a plurality of common electrodes 26 are provided on the inner surface of the common side film substrate 22, and an alignment film 27 is provided so as to cover them. A polarizing plate 28 is attached to the outer surface of the common side film substrate 22.
[0018]
The film substrates 21 and 22 are bonded to each other through a substantially rectangular frame-shaped sealing material 30 with a spacer 29 interposed between the alignment films 24 and 27. In this case, one side of the segment-side film substrate 21 protrudes from the common-side film substrate 22, and a plurality of connection terminals 31 are provided on the protrusion 21a. A part of the plurality of connection terminals 31 is directly connected to each segment electrode 23, and the rest is connected to each common electrode 26 of the common side film substrate 22 through a cross member (not shown) for inter-substrate conduction. .
[0019]
The sealing material 30 includes a substantially rectangular frame-shaped sealing material body 30a disposed along the periphery of the common-side film substrate 22, and a substrate end face side from both sides of the liquid crystal inlet 32 formed in the sealing material body 30a. And a liquid crystal injection hole protrusion 30b that protrudes toward the surface.
[0020]
A liquid crystal 33 is injected through the liquid crystal injection port 32 between the alignment films 24 and 27 of the film substrates 21 and 22 inside the sealing material 30. The liquid crystal injection port 32 is sealed with a sealing material 34.
[0021]
A sealing material damming portion 35 made of the same material as the sealing material 30 is provided between the film substrates 21 and 22 inside the liquid crystal injection port 32. The sealing material blocking portion 35 is used to prevent the sealing material 34 from entering the display area in which the electrodes 23 and 26 are provided when the liquid crystal injection port 32 is sealed with the sealing material 34. It is.
[0022]
Next, an example of a manufacturing method of the liquid crystal display panel will be described with reference to a manufacturing process diagram shown in FIG. First, in steps S1 and S6 of FIG. 3, as shown in FIG. 4, two long base film sheets 41 and 42 capable of collecting a large number of each of the film substrates 21 and 22 shown in FIG. prepare.
[0023]
In this case, sprocket holes 43 are formed at both ends in the width direction of both base film sheets 41 and 42 for transporting them by roll-to-roll. And both base film sheets 41 and 42 are conveyed by a roll-to-roll on a separate conveyance path.
[0024]
In addition, the rectangular area surrounded by the alternate long and short dash line of the segment side base film sheet 41 is an individual segment side film substrate forming area 44, which is continuously arranged in the width direction, for example, a plurality of four are arranged in parallel. The segment side film substrate forming region row is formed.
[0025]
Further, the square-shaped region surrounded by the two-dot chain line of the common-side base film sheet 42 is an individual common-side film substrate forming region 45, and the segment-side film substrate shown in FIG. The composite region row | line | column which adjoins the protrusion part corresponding | compatible area | region S corresponding to the protrusion part 21a of 21 adjacently arranges four parallel area | regions in the width direction, and aligns with the segment side film board | substrate formation area row | line | column. The protruding portion 21a of the segment side film substrate 21 shown in FIG.
[0026]
Next, in the electrode forming step S2, a plurality of segment electrodes 23 and a plurality of connection terminals 31 (see FIG. 2) are respectively provided at predetermined positions in each segment side film substrate forming region 44 of the segment side base film sheet 41. Form. Moreover, in electrode formation process S7, the some common electrode 26 (refer FIG. 2) is formed in the predetermined location of each common side film board | substrate formation area 45 of the common side base film sheet 42, respectively.
[0027]
Next, in the cut line forming step S8, as shown in FIG. 5, on both sides in the column direction (width direction of the common side base film sheet 42) of each common side film substrate forming region 45 of the common side base film sheet 42, respectively. The cut line 46 is formed by punching. The cut lines 46 may be formed in parallel two by two corresponding to the base end and the projecting end of the projecting portion 21a of the segment side film substrate 21 shown in FIG. To do.
[0028]
The length of the cut line 46 is a length that protrudes to a certain extent, for example, about 2 to 3 mm from the common-side film substrate formation region 45 to both outer sides thereof. The interval between the two cut lines 46 between the adjacent common-side film substrate forming regions 45 and 45 is an interval corresponding to the protruding length of the protruding portion 21a of the segment-side film substrate 21 shown in FIG.
[0029]
Next, in alignment film formation steps S3 and S9, alignment films 24 and 27 (see FIG. 2) are formed on the electrode formation surfaces of the base film sheets 41 and 42 so as to cover these electrodes, respectively, and then each alignment film A rubbing process is performed on the surfaces of 24 and 27 along predetermined directions.
[0030]
Next, in the sealing material forming step S4, as shown in FIG. 5, the sealing material 30 made of a thermosetting resin and a predetermined portion of each segment side film substrate forming region 44 of the segment side base film sheet 41, respectively, The sealing material damming portion 35 is formed by printing. In this case, the sealing material main body 30 a is formed by being packed on one side of the segment side film substrate forming region 44. Thereby, the protruding portion forming region 44 a is secured on the other side of the segment side film substrate forming region 44. In addition, the liquid crystal injection port protrusion 30 b protrudes to some extent outside the segment side film substrate formation region 44.
[0031]
Next, in the single wafer cutting step S5, the segment-side base film sheets 41 are cut into four pieces each having a length including three or four rows of segment-side film substrate forming regions 44 in one row. At the time of this cutting, the transport of the segment-side base film sheet 41 by roll-to-roll ends.
[0032]
On the other hand, the common-side base film sheet 42 that has completed the formation of the alignment film has a substrate-to-substrate guide made of a conductive paste at a predetermined location in each common-side film substrate forming region 45 in the cross material forming step S10. A common cloth material (not shown) is formed by printing.
[0033]
Next, in the single wafer cutting step S <b> 11, the common side base film sheet 42 is cut into the same size in correspondence with the single wafer cutting of the segment side base film sheet 41. At the time of this cutting, the conveyance of the common side base film sheet 42 by roll-to-roll is also completed.
[0034]
Next, in the spacer spraying step S <b> 12, the spacers 29 (see FIG. 2) are sprayed uniformly on each common-side film substrate forming region 45 of the common-side base film sheet 42 that has been cut into single sheets.
[0035]
Next, in the bonding step S13, as shown in FIG. 6, both the base film sheets 41 and 42 cut into single sheets are overlapped via the sealing material 30 and the sealing material damming portion 35, and heat treatment is performed. Thus, the sealing material 30 and the sealing material damming portion 35 are cured, and thereby the base film sheets 41 and 42 are bonded together.
[0036]
Here, in the method for manufacturing a film liquid crystal display panel of the present invention, the base film sheet 42 is formed with not only slits but cut lines 46, so both base film sheets 41 made of the same material, The thermal expansion coefficient of 42 is substantially the same. Therefore, even if heat treatment is performed to cure the sealing material 30 made of a thermosetting resin and bond the base film sheets 41 and 42 together, the base film sheets 41 and 42 bonded together hardly warp.
[0037]
That is, since the common side base film sheet 42 exists in the portion facing the protruding portion forming area 44a of the segment side base film sheet 41, the protruding portion forming area 44a of the segment side base film sheet 41 is as shown in FIG. There is no warping. As a result, the occurrence of a problem that the sealing material 30 melted by heating flows outside is prevented, and as a result, the gap between the base film sheets 41 and 42 is uniformly ensured at the desired size, A film liquid crystal display panel having a uniform gap can be stably manufactured.
[0038]
Next, in the line-shaped cutting step S14, the two base film sheets 41 and 42 bonded together are cut along predetermined two lines 47 and 48 indicated by a one-dot chain line in FIG. That is, one line 47 is a straight line that passes through a position slightly deviated from one end of the cut line 46. The other line 48 is a polygonal line that passes through a position slightly deviated from the other end of the cut line 46 while bypassing the liquid crystal inlet protrusion 30b.
[0039]
Then, when the bonded base film sheets 41 and 42 are cut along both lines 47 and 48, a liquid crystal display panel array 49 is obtained as shown in FIG. In this state, both the segment-side film substrate 21A and the common-side film substrate 22A have a rectangular shape with a size in which four liquid crystal display panels are arranged side by side. In addition, the portions corresponding to the liquid crystal injection port 32 of the segment side film substrate 21A and the common side film substrate 22A are left without being cut off to form the protruding portion 50.
[0040]
Next, in the liquid crystal injection step S15, the liquid crystal display panel row 49 is held in a vacuum chamber (not shown) in a state where each liquid crystal injection port 32 is faced downward and the liquid crystal 33 is stored. It is located on the liquid crystal dish 51. Next, by making the inside of the vacuum chamber into a vacuum state, air in the four liquid crystal enclosure spaces surrounded by the sealing material 30, the segment side film substrate 21 </ b> A, and the common side film substrate 22 </ b> A is supplied from each liquid crystal inlet 32. The air is exhausted, and each liquid crystal enclosure space is brought into a preset vacuum state.
[0041]
Next, the liquid crystal display panel forming body 49 is lowered, and the four protrusions 50 are immersed in the liquid crystal 33 in the liquid crystal dish 51. Next, by returning the inside of the vacuum chamber to the atmospheric pressure, the liquid crystal 33 in the liquid crystal dish 51 passes through each liquid crystal injection port 32 due to a pressure difference between the inside and outside of each liquid crystal enclosure space and a capillary phenomenon. Each is injected into the enclosed space. Next, the liquid crystal display panel row 49 is taken out from the vacuum chamber.
[0042]
Next, in the liquid crystal inlet sealing step S <b> 16, as shown in FIG. 8, the four liquid crystal inlets 32 of the liquid crystal display panel array 49 are respectively sealed with the sealing material 34.
[0043]
Next, in the liquid crystal inlet cutting step S17, the liquid crystal display panel row 49 is cut along two predetermined lines 52 and 53 indicated by the one-dot chain line in FIG. That is, one line 52 is a straight line that passes slightly outside the side of the sealing material 30 opposite to the liquid crystal inlet protrusion 30 b side of the sealing material body 30 a and intersects with one end of the cut line 46. Line. The other line 53 passes through the base portion of the liquid crystal injection port 32 from slightly outside the side of the seal material main body 30a of the seal material 30 on the liquid crystal injection port protrusion 30b side, and intersects the other end portion of the cut line 46. It is a straight line.
[0044]
When the liquid crystal display panel row 49 is cut along both lines 52 and 53, a liquid crystal display panel row 49A shown in FIG. 9 is obtained. In this state, the segment-side film substrate 21A has a strip shape having a size corresponding to four liquid crystal display panels. On the other hand, in the common side film substrate 22A, the region sandwiched between the pair of cut lines 46, 46 between the adjacent liquid crystal display panels is removed, and the common side film substrate 22A is divided into the size of one liquid crystal display panel shown in FIG. Is done. As a result, the protruding portion forming region 44a of the segment side film substrate 21A is exposed through the removed portion.
[0045]
As described above, the protruding portion forming region 44a is covered with the common-side base film sheet 42 from the pasting step S13 to immediately before the liquid crystal inlet cutting step S17. Therefore, the connection terminal 31 provided in the protruding portion formation region 44a of the segment side film substrate 21A can prevent a problem that the connection terminal 31 is soiled due to inadvertent adhesion of liquid crystal in the liquid crystal injection process.
[0046]
On the other hand, in the conventional case, as shown in FIG. 13 and FIG. 14, the slits 5 are already formed in the common-side base film sheet 2 when the base film sheets 1 and 2 are superposed for bonding. Since the base film sheets 1 and 2 are overlapped for bonding, the connection terminals 8 provided on the segment-side base film sheet 1 are exposed through the slits 5 and are therefore bonded together. There is a risk of damaging the connection terminal 8 in the process and subsequent processes.
[0047]
Next, in the polarizing plate attaching step S18, a polarizing plate (not shown) is attached to each outer surface of the four common side film substrates 22A, and one sheet is attached to the outer surface of one segment side film substrate 21A. A polarizing plate (not shown) is attached.
[0048]
Thereafter, in the individual piece cutting step S19, along a predetermined line shown by a one-dot chain line in FIG. 9 (a line corresponding to the end face of the protruding portion 21a of the liquid crystal display panel as the final product shown in FIG. 1 and the end face on the opposite side). When the segment-side film substrate 21A is cut together with the polarizing plate attached to the outer surface, four liquid crystal display panels shown in FIGS. 1 and 2 are obtained.
[0049]
Here, based on FIG. 3 and FIG. 10, the film sheet joining process from sealing material formation process S4 to bonding process S11 is demonstrated in detail. FIG. 10 is a flowchart showing in detail the film sheet joining process in the present embodiment. First, in the two-component sealing material stirring step S21, the main material and the curing material of the sealing material made of a two-component thermosetting resin such as an epoxy resin are stirred (mixed). Next, in the sealing material printing step S22, the two-component sealing material is printed on the segment-side base film sheet to form a substantially rectangular frame-shaped sealing material.
[0050]
Next, in the pre-baking step S23, pre-baking is performed at a temperature of about 70 ° C. for about 20 minutes using a pre-baking furnace to advance the curing reaction to some extent. Next, in the single wafer cutting step S24 (same as the single wafer cutting step S5 in FIG. 3), single wafer cutting is performed.
[0051]
Thereafter, in the leaving step S25, the segment-side base film sheet whose dimensions have been changed by pre-baking is left for 2 hours or more until it becomes the original dimension state. Then, in the next bonding step S26, both base film sheets are overlapped via a sealing material and set on a curing jig, and the sealing material is cured at room temperature.
[0052]
In the method of this example, since the sealing material is cured at room temperature, it is possible to substantially prevent the problem that the base film sheets bonded together are warped. However, since the segment-side base film sheet has not completely returned to its original dimensions even after passing through the standing step S25 for 2 hours or more, some warping may occur in the panel in which both base film sheets are bonded together. is there. Moreover, since it is left for 2 hours or more in the leaving step S25, the tact time becomes long.
[0053]
Next, another embodiment that can solve the above problem will be described with reference to FIG. In this example, first, in the two-component sealing material heating and stirring step S31, the main material and the curing material of the two-component sealing material such as epoxy resin are stirred (mixed) without being heated. This heating and stirring is performed for 20 minutes at a temperature of about 70 ° C. for 20 minutes as in the pre-baking conditions of FIG. 10 under the conditions for obtaining the same reaction as when pre-baking after printing and applying the two-component sealing material mixed with stirring. Advance curing reaction to some extent.
[0054]
Next, in the sealing material printing step S32, the two-component sealing material is printed on the segment side base film sheet to form a substantially rectangular frame-shaped sealing material. Next, in the single wafer cutting process S33 (same as the single wafer cutting process S5 in FIG. 3), single wafer cutting is performed. Then, in bonding process S34, both base film sheets are overlapped via a sealing material, set to a curing jig, and the sealing material is cured at room temperature.
[0055]
According to this method, since there is no step of heating the segment-side base film sheet, the warped which causes a problem in product quality is not generated in both the bonded base film sheets. Further, since there is no step of heating the segment side base film sheet, it is not necessary to leave it for cooling, and the tact time can be greatly shortened.
[0056]
In addition, in this case, since the two-component sealing material heating and stirring step S31 can be performed in parallel with the sealing material printing step S32, the tact time is further reduced as compared with the case where these steps are performed in series. can do.
[0057]
In the above embodiment, as shown in FIG. 5, the case where the cut lines 46 are formed on both sides in the column direction of each common side film substrate forming region 45 of the common side base film sheet 42 has been described. It is not limited to. For example, the cut lines 46 may be formed on only one side of the common-side base film sheet 42 in the row direction of each common-side film substrate forming region 45 on the connection terminal row side. Good. Alternatively, a straight cut line 46 may be formed on the one side, and a dotted cut line may be formed on the other side.
[0058]
In this case, in the state after the liquid crystal inlet cutting step S17 shown in FIG. 9, only one end portion (right end portion in FIG. 9) of the common side film substrate 22A is removed, and the other segment side film is removed. Unnecessary portions such as a portion facing the protruding portion formation region 44a of the substrate 21a have not been cut out yet. In this state, when both the film substrates 21A and 22A are cut along a predetermined line shown by a one-dot chain line in FIG. 9, the strip-shaped common side film substrate 22A is removed, and one liquid crystal is removed. The film is divided into four common-side film substrates having a size corresponding to the display panel.
[0059]
Therefore, in this case, the connection terminal 31 provided in the protruding portion formation region 44a of the segment side film substrate 21A from after the bonding step S13 in FIG. 3 to immediately before the individual piece cutting step S19 as the final step. (However, the connecting terminal 31 corresponding to the removed one end (the right end in FIG. 9) of the common side film substrate 22A is excluded) can be protected by covering with the common side base film sheet 42. In order to cover all the connection terminals 31, a dummy sealing material is provided outside the substrate formation area (near the sprocket hole) on both sides of both base film sheets 41 and 42, and the both sheets are bonded together. Just keep it.
[0060]
Moreover, in the said embodiment, as shown in FIG. 1, the one side part of the segment side film board | substrate 21 protrudes from the common side film board | substrate 22, and the connection terminal 31 (refer FIG. 2) is provided on this protrusion part 21a. However, the present invention is not limited to this.
[0061]
For example, as shown in FIG. 12, two adjacent sides of one film substrate 21 are projected from the other film substrate 22, and connection terminals (not shown) are provided on the upper surfaces of these projections 21a and 21b. The present invention can also be applied to a provided film liquid crystal display panel. In this case, the panel protruding portion as the terminal arrangement portion composed of both protruding portions 21a and 21b has an L shape as a whole, and the large and small L-shaped sides 81 and 82 of the L-shaped panel protruding portion forming region are formed. A cut line may be formed in the common-side base film sheet by extending both ends at an appropriate length.
[0062]
By the way, although a base film sheet is conveyed with a roll-to-roll, when a substantially L-shaped slit is formed in the base film sheet, the base film sheet is easily cut by a tension during conveyance. On the other hand, when a substantially L-shaped cut line is formed on the base film sheet, the base film sheet is difficult to cut even when subjected to a tension during conveyance, and production efficiency can be improved.
[0063]
【The invention's effect】
As described above, according to the present invention, only the cut line is formed in one of the pair of base film sheets before being bonded together, and no opening slit is provided as in the prior art. The base film sheets can have substantially the same coefficient of thermal expansion. As a result, even when heated at the time of bonding, the base film sheets do not warp and the desired uniform gap is obtained. ,further, From the front ends of the protrusions of the first and second base film sheets on which the liquid crystal inlet protrusions are formed liquid crystal The Injection Shi , Sealing the inlet with a sealing material reaching the sealing material damming portion, The inlet is sealed A liquid crystal injection port protruding portion along the side defining the first film substrate forming region of the bonded first and second base film sheets Of the first and second base film sheets formed with Since it cut | disconnected with the protrusion part, a film liquid crystal display panel can be manufactured easily.
Further, if the cut line is formed only along the side adjacent to the projecting portion corresponding region among the sides defining the film substrate forming region, one base film is separated until it is separated into individual liquid crystal display panels. Since the projecting portion corresponding region portion of the other base film sheet facing the projecting portion forming region of the sheet is not removed, this portion serves as a protective film and effectively prevents contamination of the projecting portion due to liquid crystal or the like during the manufacturing process. be able to.
[Brief description of the drawings]
FIG. 1 is a plan view of a liquid crystal display panel manufactured by a manufacturing method according to an embodiment of the present invention.
2 is a cross-sectional view taken along line AA in FIG.
3 is a view showing a manufacturing process of the liquid crystal display panel shown in FIGS. 1 and 2. FIG.
4 is a plan view for explaining both base film sheets initially prepared in steps S1 and S6 of FIG. 3; FIG.
5 is a plan view for explaining the sealing material forming step S4 and the score line forming step S8 in FIG. 3; FIG.
6 is a plan view for explaining the bonding step S13 and the row-like cutting step S14 in FIG. 3; FIG.
7 is a plan view for explaining the liquid crystal injection step S15 in FIG. 3; FIG.
FIG. 8 is a plan view for explaining the liquid crystal inlet sealing step S16 and the liquid crystal inlet cutting step S17 of FIG. 3;
9 is a plan view for explaining the polarizing plate attaching step S18 and the piece cutting step S19 in FIG.
10 is a process diagram shown for explaining another example of the sealing material forming process S4 of FIG. 3; FIG.
FIG. 11 is a process diagram shown for explaining still another example of the sealing material forming process S4 of FIG. 3;
FIG. 12 is a plan view of a liquid crystal display panel shown for explaining an application example of the present invention.
FIG. 13 is a partial plan view for explaining an example of a conventional method for manufacturing a liquid crystal display panel.
14 is a cross-sectional view taken along line BB in FIG.
FIG. 15 is a cross-sectional view for explaining one of the problems of the conventional method for manufacturing a liquid crystal display panel.
[Explanation of symbols]
21, 21A Segment side film substrate
21a Protrusion
22, 22A Common side film substrate
30 Sealing material
31 Connection terminal
41 segment side base film sheet
42 Common side base film sheet
46 score line

Claims (5)

A method of manufacturing a liquid crystal display panel in which a predetermined side portion of the first film substrate of the first and second film substrates bonded through a sealing material is protruded from the second film substrate to form a protrusion. Because
A first base film sheet having a plurality of first film substrate formation regions corresponding to the first film substrate disposed in parallel with the protruding portion side being adjacent to another adjacent first film substrate formation region; The first film substrate includes a second film substrate forming region corresponding to the second film substrate, and a protruding portion corresponding region adjacent to the second film substrate forming region and corresponding to the protruding portion of the first film substrate. A plurality of second base film sheets each having a composite area corresponding to the formation area and arranged in parallel in the same arrangement as that of the first film substrate formation area; Cut lines that are longer at both ends than the side are formed along at least the sides adjacent to the projecting portion corresponding region among the sides that define the second film substrate forming regions. And a substantially rectangular frame-shaped sealing material body disposed along the periphery of the second film substrate, the first base film sheet and the second base film sheet on which the cut line is formed, A plurality of the sealing materials comprising a liquid crystal injection port formed in the sealing material main body, and a liquid crystal injection port protruding portion protruding from both sides of the liquid crystal injection port toward the substrate end surface, and provided inside the liquid crystal injection port The liquid crystal injection port protrusions of the first and second base films are formed so that the first film substrate formation region and the composite region are aligned with each other through the sealing material damming portion. The first and second base film sheet projecting portions are formed by projecting the first portion and the second base film sheet from the portion corresponding to the side where the liquid crystal injection port of the sealing material body is formed. , 2 base film was cut, the liquid crystal injection port protrusion claim 1 is formed, the liquid crystal to the tip of the protruding portion of the second base film sheet in the sealant within the body from the liquid crystal inlet protrusion into contact with the liquid crystal The first and second base film sheets bonded to each other by sealing the injection port with the sealing material reaching the sealing material damming portion and sealing the injection port. A plurality of liquid crystal display panels are obtained by cutting together with the protrusions of the first and second base film sheets formed with the liquid crystal injection hole protrusions along the side defining the substrate forming region. Panel manufacturing method. In the invention according to claim 1, each of the first base film sheet and the second base film sheet has a row of regions in which the first film substrate forming region and the composite region are arranged in parallel in the width direction, respectively. A method for producing a liquid crystal display panel, comprising a long sheet arranged in a plurality of rows in the length direction. 2. The liquid crystal display according to claim 1, wherein the protruding portion is formed on one side of the first film substrate, and the protruding portion is provided with a plurality of connection terminals for applying voltage. Panel manufacturing method. 4. The invention according to claim 3, wherein the second base film sheet has a side adjacent to the projecting portion corresponding region among the sides defining each second film substrate forming region of the sheet and another second film. A method of manufacturing a liquid crystal display panel, characterized in that cut lines longer than both sides are formed along both sides of a side adjacent to the substrate forming region. In the invention according to any one of claims 1 to 4, the material of the sealing material is a material made of a two-component thermosetting resin made of a main agent and a hardener, and the main agent and the hardener are kept at a predetermined temperature for a predetermined time. A method for producing a liquid crystal display panel, wherein the material is printed and applied to one of the first and second base film sheets after stirring while heating.

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