JP4102913B2 - Liquid crystal display panel and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid crystal display panel capable of effectively using liquid crystals without waste and greatly promoting cost reduction and a method for manufacturing the same.
[0002]
[Prior art]
FIG. 9 is a plan view of an example of a conventional liquid crystal display panel, and FIG. 10 is a sectional view taken along the line CC of FIG. This liquid crystal display panel includes a segment-side film substrate 1 and a common-side film substrate 2 both made of a flexible film sheet. A plurality of segment electrodes 3 are provided on the upper surface in FIG. 10 of the segment side film substrate 1, and an alignment film 4 is provided so as to cover them. A plurality of common electrodes 5 are provided on the lower surface in FIG. 10 of the common-side film substrate 2, and an alignment film 6 is provided so as to cover them.
[0003]
And both the film substrates 1 and 2 are bonded together via the sealing material 7 interposed between them. In this case, the right side part in FIG. 9 of the segment side film board | substrate 1 protrudes from the common side film board | substrate 2, and the connection terminal 8 is provided in the upper surface of this protrusion part 1a. A part of the connection terminal 8 is directly connected to the segment electrode 3, and the rest is connected to the common electrode 5 via a conductive member (not shown).
[0004]
The sealing material 7 includes a substantially rectangular frame-shaped sealing material body 7a having a liquid crystal injection port 9 in a portion corresponding to the central portion of the lower side portion in FIG. 9 of the common side film substrate 2, and a liquid crystal injection port of the sealing material body 7a. 9 and a liquid crystal injection hole protrusion 7b protruding from both sides. The sealing material body 7a is provided slightly inside the end surfaces of the four sides of the common side film substrate 2, and the liquid crystal inlet projection 7b is projected to the lower end surface of the common side film substrate 2 in FIG. .
[0005]
A liquid crystal 10 is injected between the alignment films 4 and 6 of both film substrates 1 and 2 inside the sealing material 7 through a liquid crystal injection port 9. The liquid crystal injection port 9 is sealed with a sealing material 11. A sealing material damming portion 12 made of the same material as the sealing material 7 is provided between the film substrates 1 and 2 inside the liquid crystal injection port 9. The sealing material damming portion 12 is used to prevent the sealing material 11 from entering the display area in which the electrodes 3 and 5 are provided when the liquid crystal injection port 9 is sealed with the sealing material 11. It is.
[0006]
Next, an example of a method for manufacturing the liquid crystal display panel will be described. First, as shown in FIG. 11, two long base films 21 and 22 capable of collecting a large number of film substrates 1 and 2 are prepared. In this case, sprocket holes 23 are formed at both ends in the width direction of both base films 21 and 22. A plurality of sets of, for example, four sets of sealing materials 7 and sealing material damming portions 12 are provided on the upper surface of the base film 21 on the segment side at intervals in the width direction. In this case, the liquid crystal inlet protrusion 7 b of the sealing material 7 is provided on one side in the length direction of the base film 21. Further, the length of the liquid crystal injection hole protrusion 7b of the sealing material 7 is somewhat longer than that shown in FIG.
[0007]
In the base film 22 on the common side, five slits 24 are formed by punching at intervals in the width direction. Of the five slits 24, the four right slits 24 are provided at positions corresponding to the right sides of the four sealing materials 7 (that is, positions corresponding to the protruding portions 1 a shown in FIG. 9), and the remaining leftmost slits. 24 is provided at a position corresponding to the left side of the leftmost sealing material 7. The length of the slit 24 is somewhat longer than the vertical length of the common-side film substrate 2 shown in FIG. The role of the slit 24 will be described later.
[0008]
Next, the base films 21 and 22 are bonded together with the sealing material 7 and the sealing material damming portion 12. Next, when the bonded base films 21 and 22 are cut along a predetermined line shown by a one-dot chain line in FIG. 11, a liquid crystal display panel forming body 25 shown in FIG. 12 is obtained. In this state, the segment side film substrate 1A has a strip shape having a size corresponding to four liquid crystal display panels, but the common side film substrate 2A has a size corresponding to one liquid crystal display panel due to the presence of the slits 24. It is divided into two. Further, portions corresponding to the liquid crystal injection port 9 of the segment side film substrate 1A and the common side film substrate 2A are projected to form a projected portion 26. Furthermore, the liquid crystal injection hole protrusion 7b of the sealing material 7 is provided on the inner side of the end surfaces of the left and right sides of the protrusions 26 of the segment side film substrate 1A and the common side film substrate 2A.
[0009]
Next, the liquid crystal display panel forming body 25 is placed on a liquid crystal dish 27 in a vacuum chamber (not shown). Next, the vacuum chamber is evacuated, whereby the space between the segment-side film substrate 1A and the common-side film substrate 2A inside the sealing material 7, that is, the liquid crystal enclosure space is evacuated. Next, the liquid crystal display panel forming body 25 is lowered, and the protrusion 26 is immersed in the liquid crystal 10 accommodated in the liquid crystal dish 27.
[0010]
Next, the inside of the vacuum chamber is set to atmospheric pressure. Then, the liquid crystal 10 in the liquid crystal dish 27 is injected into the liquid crystal sealing space through the liquid crystal injection port 9 due to the pressure difference and the capillary phenomenon. Next, the liquid crystal display panel formation body 25 is taken out from the vacuum chamber. Next, the liquid crystal display panel formed body 25 is left in the atmosphere for about 4 hours. As a result, the liquid crystal spreads uniformly and evenly to every corner of the liquid crystal enclosure space.
[0011]
Next, as shown in FIG. 13, the liquid crystal injection port 9 is sealed with a sealing material 11. Next, the protruding portion 26 of the liquid crystal display panel forming body 25 is cut and removed. Next, when the segment side film substrate 1A is cut along a predetermined line indicated by a one-dot chain line in FIG. 13, four liquid crystal display panels shown in FIG. 9 are obtained.
[0012]
Here, the role of the slit 24 will be described. As described above, when the segment-side film substrate 1A is cut at the position indicated by the alternate long and short dash line in FIG. 13, four liquid crystal display panels shown in FIG. 9 are obtained. In this case, in FIG. 9, the portion corresponding to the protruding portion 1 a of the segment side film substrate 1 of the common side film substrate 2 is removed in advance due to the presence of the slit 24. Therefore, in FIG. 13, it is not necessary to cut the portion of the common-side film substrate 2A at this point. On the other hand, if the portion of the common-side film substrate 2A is cut at this point without forming the slit 24, the connection terminal 8 (see FIG. 10) provided below the portion is damaged or completely cut. Sometimes. Therefore, it is the role of the slit 24 to eliminate such inconvenience.
[0013]
[Problems to be solved by the invention]
By the way, in the manufacturing method of the conventional liquid crystal display panel, as shown in FIG. 12, a gap is formed between the segment side film substrate 1A and the common side film substrate 2A on the outer side of the sealing material 7. For this reason, when the projection 26 of the liquid crystal display panel formation body 25 is immersed in the liquid crystal 10 in the liquid crystal dish 27 and liquid crystal is injected, the liquid crystal 10 is not only unnecessarily adhered to the inner and outer surfaces of the projection 26 but also the liquid crystal injection. The liquid crystal 10 attached to the inner surface of the protruding portion 26 outside the inlet protruding portion 7b enters and adheres to the gap between the segment-side film substrate 1A and the common-side film substrate 2A outside the sealing material body 7a due to capillary action. It will be. Therefore, conventionally, after the liquid crystal injection port 9 is sealed with the sealing material 11, unnecessary liquid crystal is washed and removed. In particular, the segment side film substrate 1A on the outer side of the sealing material body 7a There is a problem that it is difficult to remove the liquid crystal that has entered the gap between the common side film substrate 2A, it takes time to clean, and the expensive liquid crystal is considerably wasted, resulting in high costs.
An object of the present invention is to prevent unnecessary adhesion of liquid crystal, particularly adhesion due to capillary action, to suppress wasteful consumption of liquid crystal and to reduce manufacturing man-hours related to cleaning of liquid crystal.
[0014]
[Means for Solving the Problems]
The invention according to claim 1 is a liquid crystal display panel in which two substrates are bonded together via a sealing material having a liquid crystal injection port, and liquid crystal is sealed between the two substrates inside the sealing material. The sealing material is formed on the side where the outer end surface is formed at the same position as the end surface of at least one of the two substrates and the liquid crystal injection port of the sealing material is formed. A narrow portion recessed to the liquid crystal injection port side with a length shorter than the length of the liquid crystal injection port, and a dam that blocks entry of a sealant that seals the liquid crystal injection port into the narrow portion. A stop portion is provided .
According to a second aspect of the present invention, in the first aspect of the present invention, a film substrate is used as the two substrates.
According to a third aspect of the present invention, there is provided a liquid crystal display panel in which two substrates are bonded together via a sealing material having a liquid crystal inlet, and liquid crystal is sealed between the two substrates inside the sealing material. In the method, a slit that forms an end surface of at least one of the two substrates is provided, and the outer end surface of the sealing material is positioned at the same position as the end of the slit between the substrate and the substrate. A liquid crystal injection hole projecting part that is positioned and formed to protrude outward, and bonding the two substrates, and after injecting liquid crystal through the liquid crystal injection hole protrusion, the liquid crystal And a step of cutting out the inlet protrusion.
According to a fourth aspect of the present invention, in the third aspect of the present invention, the depth of the liquid crystal reservoir stored for injecting the protruding length of the liquid crystal injection port protruding portion is longer.
The invention according to claim 5 is the invention according to claim 3 or 4 , wherein the protrusion length of the liquid crystal inlet protrusion of one of the two substrates is the protrusion length of the liquid crystal inlet of the other substrate. It is formed shorter than the protruding length of the part.
The invention according to claim 6 is the invention according to any one of claims 3 to 5, wherein a film substrate is used as the two substrates.
According to the first and fourth aspects of the present invention, since the portion where the two substrates are opposed to each other outside the sealing material is not generated as in the prior art, when the liquid crystal is injected, the liquid crystal is applied to the portion facing the substrate. It is possible to reliably prevent the occurrence of unnecessary adhesion due to capillary action or the like. As a result, wasteful consumption of the liquid crystal is remarkably suppressed, and the man-hours for cleaning the adhered liquid crystal are greatly reduced, and the cost reduction is remarkably promoted.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a plan view of a liquid crystal display panel according to a first embodiment of the present invention, and FIG. 2 is a sectional view taken along line AA of FIG. In these drawings, for convenience of explanation, the same reference numerals are used for the same name portions as those of the conventional ones shown in FIGS. 9 and 10.
[0016]
This liquid crystal display panel includes a segment-side film substrate 1 and a common-side film substrate 2 each made of a transparent flexible film sheet. A plurality of segment electrodes 3 are provided on the upper surface of the segment side film substrate 1 in FIG. 2, and an alignment film 4 is provided so as to cover them. A plurality of common electrodes 5 are provided on the lower surface of the common-side film substrate 2 in FIG. 2, and an alignment film 6 is provided so as to cover them.
[0017]
And both the film substrates 1 and 2 are bonded together via the sealing material 7 interposed between them. In this case, a predetermined one side portion of the segment-side film substrate 1 protrudes from the common-side film substrate 2, and a connection terminal 8 is provided on the upper surface of the protruding portion 1a. A part of the connection terminal 8 is directly connected to the segment electrode 3, and the rest is connected to the common electrode 5 via a conductive member (not shown).
[0018]
The sealing material 7 according to the present invention is composed only of a substantially rectangular frame-shaped sealing material main body 7a having a liquid crystal injection port 9 at a portion corresponding to the central portion of the lower side portion in FIG. The sealing material main body 7 a is formed wider than the conventional one, and is provided so that the outer end face thereof is located at the same position as the end faces of the four sides of the common film substrate 2. That is, it has a configuration in which there is no portion where the film substrates 1 and 2 face each other outside the sealing material 7.
[0019]
A liquid crystal 10 is injected between the alignment films 4 and 6 of both film substrates 1 and 2 inside the sealing material 7 through a liquid crystal injection port 9. The liquid crystal injection port 9 is sealed with a sealing material 11. A sealing material damming portion 12 made of the same material as the sealing material 7 is provided between the film substrates 1 and 2 inside the liquid crystal injection port 9.
[0020]
Next, an example of a method for manufacturing the liquid crystal display panel will be described. First, as shown in FIG. 3, two long base films 21 and 22 capable of collecting a large number of film substrates 1 and 2 are prepared. In this case, sprocket holes 23 are formed at both ends in the width direction of both base films 21 and 22. A plurality of sets of, for example, four sets of sealing materials 7 and sealing material damming portions 12 are provided on the upper surface of the base film 21 on the segment side at intervals in the width direction. In this case, the liquid crystal injection port 9 of the sealing material 7 is provided on one side in the length direction of the base film 21. The sealing material 7 includes a substantially rectangular frame-shaped sealing material body 7a having a liquid crystal injection port 9, and a liquid crystal injection port protruding portion 7b protruding from both sides of the liquid crystal injection port 9 of the sealing material body 7a. Yes. The liquid crystal inlet protrusion 7b protrudes to the lower one-dot chain line shown in FIG.
[0021]
Five slits 24 are formed on the common base film 22 by punching at intervals in the width direction. The four slits 24 on the right side of the five slits 24 are provided at positions corresponding to the right sides of the four sealing materials 7 (that is, positions corresponding to the protruding portions 1a shown in FIG. 2), and the remaining leftmost slits. 24 is provided at a position corresponding to the left side of the leftmost sealing material 7. The length of the slit 24 is somewhat longer than the length in the vertical direction of the left and right sides of the sealing material 7, that is, the length in the vertical direction of the common side film substrate 2 shown in FIG.
[0022]
Next, the base films 21 and 22 are bonded together with the sealing material 7 and the sealing material damming portion 12. In this state, the end surface in the width direction adjacent to the seal material 7 of the slit 24 overlaps with the end surface on the outer side of the left and right side portions of the seal material 7. Next, when the bonded base films 21 and 22 are cut along a predetermined line indicated by a one-dot chain line in FIG. 3, a liquid crystal display panel forming body 25 shown in FIG. 4 is obtained. In this state, the segment side film substrate 1A has a strip shape having a size corresponding to four liquid crystal display panels, but the common side film substrate 2A has a size corresponding to one liquid crystal display panel due to the presence of the slits 24. It is divided into two. In addition, portions corresponding to the liquid crystal injection port protrusions 7 b of the segment side film substrate 1 </ b> A and the common side film substrate 2 </ b> A protrude to form a protrusion 26. Further, the outer peripheral end surface of the common-side film substrate 2A including the protruding portion 26 overlaps with the outer peripheral end surface of the sealing material 7 including the liquid crystal inlet protruding portion 7b.
[0023]
Next, the liquid crystal display panel forming body 25 is placed on a liquid crystal dish 27 in a vacuum chamber (not shown). Next, by making the inside of the vacuum chamber into a vacuum state, the space between the segment side film substrate 1A and the common side film substrate 2 inside the sealing material 7 is made into a vacuum state. Next, the liquid crystal display panel forming body 25 is lowered, and the protrusion 26 is immersed in the liquid crystal 10 accommodated in the liquid crystal dish 27.
[0024]
Next, the inside of the vacuum chamber is set to atmospheric pressure. Then, the liquid crystal 10 in the liquid crystal dish 27 is injected between the segment side film substrate 1A and the common side film substrate 2A inside the sealing material 7 through the liquid crystal injection port 9 due to the pressure difference and the capillary phenomenon. In this case, since the outer peripheral surface of the sealing material 7 including the liquid crystal inlet protrusion 7b overlaps with the outer peripheral surface of the common side film substrate 2A including the protrusion 26, the segment side film substrate outside the sealing material 7 is used. There is no gap between 1A and the common film substrate 2A. Therefore, even if the liquid crystal 10 is unnecessarily attached to the outer surface of the projecting portion 26, the liquid crystal 10 can be prevented from being unnecessarily attached to the outer surfaces of the right and left sides of the sealing material 7 due to capillary action. Liquid crystal can be saved considerably, and the cost can be reduced.
[0025]
Next, the liquid crystal display panel formation body 25 is taken out from the vacuum chamber. Next, the liquid crystal display panel formed body 25 is left in the atmosphere for about 4 hours. As a result, the liquid crystal spreads uniformly and evenly to every corner of the liquid crystal enclosure space.
[0026]
Next, as shown in FIG. 5, the liquid crystal injection port 9 is sealed with a sealing material 11. Next, the protruding portion 26 of the liquid crystal display panel forming body 25 is cut and removed. In this case, even if the liquid crystal 10 is unnecessarily attached to the outer surface of the protruding portion 26, if the protruding portion 26 is cut and removed, the liquid crystal 10 that is unnecessarily attached to the protruding portion 26 can be simultaneously removed. In addition, as described above, the liquid crystal 10 can be prevented from unnecessarily adhering to the outer surfaces of the right and left side portions of the sealing material 7 due to capillary action, so a cleaning process for removing the unnecessarily adhered liquid crystal 10 is performed. Therefore, the cost can be reduced. Next, when the segment-side film substrate 1A is cut along a predetermined line indicated by a one-dot chain line in FIG. 5, four liquid crystal display panels shown in FIG. 1 are obtained.
[0027]
Here, as an example, it is assumed that the depth of the liquid crystal dish 27 and the protruding length of the protruding portion 26 of the liquid crystal display panel forming body 25 are 3 mm. Then, when the liquid crystal 10 is fully contained in the liquid crystal dish 27, the liquid crystal display panel forming body 25 is brought into contact with the projecting end of the projecting portion 26 of the liquid crystal display panel forming body 25 against the bottom surface in the liquid crystal dish 27. The lower end surface of the portion excluding the protruding portion 26 comes into contact with the surface of the liquid crystal 10 in the liquid crystal dish 27. Therefore, in such a case, the liquid crystal 10 may unnecessarily adhere to the lower end surface of the liquid crystal display panel formation body 25. However, since the lower end surface of the liquid crystal display panel forming body 25 is a flat surface in which the end surfaces of the respective members are aligned at the same position as described above, the liquid crystal adhered thereto can be easily removed by washing. .
[0028]
As in the second embodiment of the present invention shown in FIG. 6, for example, when the depth of the liquid crystal dish 27 is 3 mm, the protrusion length of the protrusion 26 of the liquid crystal display panel forming body 25 is 4 mm. The liquid crystal 10 can be prevented from adhering unnecessarily to the lower end surface of the display panel formation body 25. Therefore, in this case, even if the liquid crystal 10 is unnecessarily attached to the outer surface of the protrusion 26, if the protrusion 26 is cut and removed, the liquid crystal 10 that is unnecessarily attached to the protrusion 26 is simultaneously removed. Therefore, it is possible to eliminate the cleaning process for removing the unnecessarily attached liquid crystal 10.
[0029]
Moreover, although the said embodiment demonstrated the case where the width | variety of the sealing material main body 7a of the sealing material 7 was made uniform, it is not limited to this. For example, as in the third embodiment of the present invention shown in FIG. 7, the width on both sides of the liquid crystal injection port 9 of the sealing material body 7a is made narrower than the width of the adjacent portion to form the narrow portion 7c. You may make it provide the sealing material damming part 12 inside the narrow part 7c. In this case, the sealing material damming portion 12 can be separated from the display area by the amount that the width of the narrow portion 7c is narrowed, and thus the display area can be widened. Further, the sealing material damming portion 12 can be provided on an extension line of the arrangement region of the sealing material 7 on both sides of the narrow portion 7c. In this case, when the base films 21 and 22 are bonded to each other via the sealing material 7 and the sealing material damming portion 12, pressure should not be concentrated on both ends of the sealing material damming portion 12. As a result, when the lead wire is provided under the both ends of the sealing material damming portion 12, it is possible to prevent cracks from occurring.
[0030]
Further, as shown in FIGS. 7 and 8, in the protruding portion 26 of the liquid crystal display panel forming body 25, the protruding length of the protruding portion of the common side film substrate 2A is shorter than the protruding length of the protruding portion of the segment side film substrate 1A. Then, the protrusion length of the liquid crystal inlet protrusion 7b may be the same as the protrusion length of the protrusion of the common-side film substrate 2A. In this case, as shown in FIG. 8, after the liquid crystal is injected, the liquid crystal 10 is sufficiently adhered to the stepped portions of the projecting portions of the two film substrates 1A and 2A due to the surface tension. As a result, the liquid crystal injection port 9 is substantially closed. As a result, as described above, when the liquid crystal display panel forming body 25 is left in the atmosphere for about 4 hours after the liquid crystal is injected, the atmosphere is prevented from entering between the film substrates 1A and 2A inside the sealing material 7. Can do. As a method of making the protrusion length of the protrusion of the common side film substrate 2A shorter than the protrusion length of the protrusion of the segment side film substrate 1A, a slit 24 is formed in the base film 22 on the common side in this shortened portion. In this case, a method of simultaneously forming a slit can be considered.
[0031]
Further, for example, in the embodiment shown in FIG. 7, only the widths of both side portions of the liquid crystal injection port 9 of the sealing material 7 are formed narrower than the other portions. The width of the sealing material may be made uniform over the entire circumference while being matched with the end face position. As a result, it is possible to promote a narrow frame of the liquid crystal display device by ensuring a large area of the display portion while keeping the outer shape of the liquid crystal display device as it is. In addition, in each of the above-described embodiments, the case where the present invention is applied to a liquid crystal display panel including a film substrate has been described. However, the present invention is not limited thereto, and can be applied to a liquid crystal display panel including a glass substrate.
[0032]
【The invention's effect】
As described above, according to the present invention, the sealing material is provided so that the outer end surface is located at the same position as the end surface of at least one of the two substrates , and the liquid crystal of the sealing material is provided . Since a narrow portion is formed on the side where the inlet is formed, and a damming portion is provided inside the narrow portion, a portion where the two substrates are opposed to each other outside the sealing material as in the prior art is not generated. Therefore, when the liquid crystal is injected, it is possible to reliably prevent a problem that the liquid crystal is unnecessarily attached to the substrate facing portion due to a capillary phenomenon or the like, and the damming portion can be separated from the display area . As a result, wasteful consumption of the liquid crystal is remarkably suppressed, and the man-hours for cleaning the adhered liquid crystal are greatly reduced, and the cost reduction is remarkably promoted.
Moreover, when using a film substrate, since the edge part of a board | substrate does not protrude from a sealing material outer end surface, the malfunction which a board | substrate edge part warps does not generate | occur | produce easily. In addition, if the outer end face position of the sealing material is made to coincide with the end face position of the substrate and the width of the sealing material is uniformly narrowed over the entire circumference, the area of the liquid crystal display device can be kept as it is, and a large display area can be secured. Narrowing of the device can be promoted.
[Brief description of the drawings]
FIG. 1 is a plan view of a liquid crystal display panel according to a first embodiment of the present invention.
2 is a cross-sectional view taken along line AA in FIG.
3 is a diagram showing a state in which two base films are bonded to each other when the liquid crystal display panel shown in FIG. 1 is manufactured.
4 is a view for explaining liquid crystal injection in manufacturing the liquid crystal display panel shown in FIG. 1; FIG.
FIG. 5 is a view for explaining a case where a final liquid crystal display panel is obtained in manufacturing the liquid crystal display panel shown in FIG. 1;
FIG. 6 is a view for explaining the injection of liquid crystal when the liquid crystal display panel according to the second embodiment of the present invention is manufactured.
FIG. 7 is a view for explaining injection of liquid crystal in manufacturing a liquid crystal display panel according to a third embodiment of the present invention.
8 is a cross-sectional view taken along line BB of the liquid crystal display panel forming body shown in FIG.
FIG. 9 is a plan view of an example of a conventional liquid crystal display panel.
10 is a cross-sectional view taken along line CC in FIG. 9;
11 is a diagram showing a state in which two base films are bonded to each other when the liquid crystal display panel shown in FIG. 9 is manufactured.
12 is a view for explaining liquid crystal injection in manufacturing the liquid crystal display panel shown in FIG. 9; FIG.
13 is a view for explaining a case where a final liquid crystal display panel is obtained in manufacturing the liquid crystal display panel shown in FIG. 9;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Segment side film board | substrate 2 Common side film board | substrate 7 Sealing material 9 Liquid crystal inlet 10 Liquid crystal 11 Sealing material 12 Sealing agent damming part

Claims (6)

A liquid crystal display panel in which two substrates are bonded together via a sealing material having a liquid crystal injection port, and liquid crystal is sealed between the two substrates inside the sealing material, the sealing material having an outer end surface Is formed at the same position as the end face of at least one of the two substrates, and the side where the liquid crystal injection port of the sealing material is formed has a length shorter than the length of the side. narrow portion recessed liquid crystal inlet side is formed, it damming portion blocking the entry into the inside of the sealant for sealing the liquid crystal inlet inside of the narrow portion is al provided A liquid crystal display panel characterized by 2. The liquid crystal display panel according to claim 1 , wherein the two substrates are film substrates. In the method of manufacturing a liquid crystal display panel in which two substrates are bonded together via a sealing material having a liquid crystal inlet, and liquid crystal is sealed between the two substrates inside the sealing material.
A slit that forms an end surface of at least one of the two substrates is provided, and the outer end surface of the sealing material is positioned at the same position as the end of the slit between the substrate and the substrate facing the substrate. And a step of bonding the two substrates by arranging so as to form a liquid crystal injection hole protrusion protruding outward .
And a step of cutting off the liquid crystal injection hole protrusion after injecting liquid crystal through the liquid crystal injection hole protrusion. 4. The method of manufacturing a liquid crystal display panel according to claim 3 , wherein the protrusion length of the liquid crystal injection hole protrusion is longer than the depth of the liquid crystal reservoir stored for injection. 5. The invention according to claim 3 , wherein a projection length of the liquid crystal injection hole protrusion of one of the two substrates is shorter than a protrusion length of the liquid crystal injection hole protrusion of the other substrate. A method for producing a liquid crystal display panel. 6. The method of manufacturing a liquid crystal display panel according to claim 3 , wherein the two substrates are film substrates.

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