JP2011128400A - Method of manufacturing liquid crystal display device and liquid crystal display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display device in which cut of a sealing material is suppressed, and a method of manufacturing the same. <P>SOLUTION: In the method of manufacturing the liquid crystal display device 10 including a first step of preparing a pair of substrates for a liquid crystal display panel, a second step of applying the sealing material 17 using a seal dispenser by a prescribed application pattern around the display area of one of the pair of substrates, and a third step of sticking the pair of substrates together, The application track of the sealing material 17 is formed while moving the seal dispenser so as to generate a part 20 where a part 18b where the sealing material 17 is applied later is in contact with or superimposed on a part 18a where it is applied first. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

The present invention relates to a manufacturing method of a liquid crystal display device and a liquid crystal display device in which the seal material is prevented from being cut, and more specifically, by applying a device to the application path of the seal material, the seal material is prevented from being cut and the display screen is narrowed. The present invention relates to a method for manufacturing a liquid crystal display device that can be framed and a method for manufacturing the liquid crystal display device.

The liquid crystal display device is manufactured by bonding an array substrate having a transparent substrate made of glass or the like and a color filter substrate through a sealing material. As a method for applying the seal material, there are a dispenser application method in which a seal material is applied using a dedicated seal dispenser and a screen printing method. Recently, the dispenser application method has become mainstream. In the dispenser coating method, it is important to apply the sealing material filled in the dispenser on the substrate in a uniform amount, and to apply it at an accurate position.

Conventionally, in the process of applying the sealing material in the manufacturing process of the liquid crystal display device, one (single)
The sealing material was formed in a linear coating pattern. For this reason, during the formation of the sealing material, if a seal breakage occurs due to an instantaneous discharge amount failure of the dispenser device, liquid crystal leakage or the like is injected in the liquid crystal injection process after the substrates are bonded together. Bad (
There is a risk of air bubbles).

In order to solve such a problem, the following Patent Document 1 discloses a method of manufacturing a liquid crystal display panel by forming a double sealing material. That is, the following Patent Document 1
In the liquid crystal display panel, the viscosity of the second seal portion surrounding the periphery of the first seal portion is made lower than the viscosity of the first seal portion, for example, between the first substrate and the second substrate. Even if the first seal part is broken while the atmospheric pressure is kept lower than the external atmospheric pressure, the first seal part is caused by the differential pressure between the inside of the first seal part and the outside of the second seal part. Since a part of the second seal portion is pushed into the cut portion, the cut of the first seal portion can be repaired.

JP 2007-065189 A

However, when the sealing material is formed in a double manner as in Patent Document 1 in order to prevent the seal from being cut off, a new problem occurs such that the display area becomes narrow and the frame cannot be accommodated. This problem is the same even when the width of the sealing material is increased.

As a result of various studies to solve the above-mentioned problems, the present inventor has made the application shape of the sealing material partly by making the application shape such that some of the sealing material has a lateral overlap. Thus, the present inventors have found that the function of the sealing material is maintained by closing the sealing with another sealing material that overlaps in the lateral direction even if the sealing is broken, and the present invention has been completed.

That is, the present invention suppresses the cutting of the sealing material by the irregular sealing material application shape,
An object of the present invention is to provide a liquid crystal display method and a liquid crystal display device in which problems such as liquid crystal leakage are suppressed.

In order to achieve the above object, a method for manufacturing a liquid crystal display device of the present invention includes:
A first step of preparing a pair of substrates for a liquid crystal display panel;
A second step of applying a sealant to a predetermined application pattern using a seal dispenser around the display area of one of the pair of substrates;
A third step of bonding the pair of substrates;
In the method of manufacturing a liquid crystal display device, the seal dispenser is moved so that a part where the application path of the sealant is applied after the sealant comes into contact with or overlaps with the previously applied part. It is characterized by forming.

In the manufacturing method of the liquid crystal display device of the present invention, the sealing material is applied in an irregular application locus, unlike the conventional linear application, and the sealing materials overlap in parallel. It is applied with an application trajectory that you have. Therefore, according to the method for manufacturing a liquid crystal display device of the present invention, even if a portion of the applied sealing material is cut, there is another sealing material applied in a position overlapping in parallel. It is possible to suppress poor application due to cutting off, and to suppress liquid crystal leakage.

In the method for manufacturing a liquid crystal display device of the present invention, the predetermined coating pattern is formed while moving the seal dispenser so that the coating locus of the sealing material is at least one of meandering, skewing, and circles. It is preferable to do.

In the manufacturing method of the liquid crystal display device of the present invention, since the coating pattern of the sealing material can be formed with various coating trajectories, the seal breakage can be further suppressed and the range of design can be widened.

In the method for manufacturing a liquid crystal display device of the present invention, the predetermined coating pattern is formed while moving the seal dispenser so that the coating locus of the sealing material is a repeating unit of the same length in an oblique direction. be able to.

According to the method for manufacturing a liquid crystal display device of the present invention, the application path of the seal material can be formed in a so-called jagged shape, and there are many portions that contact or overlap with another seal material applied in a position overlapping in parallel. Cutting can be efficiently suppressed.

In the method for manufacturing a liquid crystal display device of the present invention, the predetermined coating pattern can be formed while moving the seal dispenser so that the coating locus of the sealing material is a long and short repeating unit in an oblique direction.

According to the manufacturing method of the liquid crystal display device of the present invention, the application path of the sealing material can be formed in a so-called jagged shape, and the length of a part of the sealing material can be shortened, so that the amount of the sealing material used is reduced. Thus, a liquid crystal display device with reduced manufacturing costs can be manufactured.

In the method for manufacturing a liquid crystal display device of the present invention, the predetermined coating pattern can be formed while moving the seal dispenser so that the coating locus of the sealing material is in an annular row.

According to the method for manufacturing a liquid crystal display device of the present invention, since the sealing material is applied so as to advance while drawing a circle, it can be applied so as not to cause a gap between the sealing materials, and the seal breakage is efficiently suppressed. can do.

Moreover, in the manufacturing method of the liquid crystal display device of this invention, it is preferable that the application locus | trajectory of the said sealing material is a one-stroke writing.

According to the method for manufacturing a liquid crystal display device of the present invention, since the seal material is applied with a single stroke, the control of the seal dispenser is facilitated, and breakage of the seal material can be further suppressed.

Moreover, in the manufacturing method of the liquid crystal display device of this invention, it is preferable that the application locus | trajectory of the said sealing material is intermittent.

According to the method for manufacturing a liquid crystal display device of the present invention, since the sealing material is intermittently applied, it is possible to suppress the partial application of the sealing material so that the amount of the sealing material used can be reduced. .

Moreover, in the manufacturing method of the liquid crystal display device of this invention, it is preferable that the application locus | trajectory of the said sealing material is narrower than the said predetermined application pattern.

According to the manufacturing method of the liquid crystal display device of the present invention, since the application path of the sealing material is irregular, it is possible to prevent the sealing material from being cut even if it is applied thinner than the application width of the conventional sealing material. it can. Therefore, since the application width of the sealing material can be narrowed compared to the conventional example, the frame of the liquid crystal display device can be made narrower than that of the conventional example.

Moreover, in the manufacturing method of the liquid crystal display device of this invention, it is preferable that the application quantity of the said sealing material was increased compared with the linear part in the corner | angular part of the said application pattern.

According to the method for manufacturing a liquid crystal display device of the present invention, it is difficult to control the seal dispenser, and the corner portion where the seal material is likely to be cut is formed thicker than the straight portion, thereby suppressing the seal material from being cut at the corner portion. be able to.

Moreover, in the manufacturing method of the liquid crystal display device of this invention, it is preferable that the said sealing material is a resin material.

According to the method for manufacturing a liquid crystal display device of the present invention, the liquid crystal display device can be manufactured without using a special sealing material, so that it is not necessary to provide a special manufacturing process, and the manufacturing cost can be reduced.

Furthermore, in order to achieve the said objective, the liquid crystal display device of this invention is produced by the manufacturing method of the liquid crystal display device in any one of Claims 1-14, The width | variety of the sealing material of the said predetermined coating pattern Randomly changing, and unevenness is formed on the side surface.

According to the liquid crystal display device of the present invention, it is possible to provide a liquid crystal display device in which the problem of liquid crystal leakage due to a seal breakage is suppressed.

1A is a plan view of a liquid crystal display device according to Embodiment 1 of the present invention, and FIG. 1B is a cross-sectional view taken along line IB-IB in FIG. 1A. 2A is an enlarged view of the IIA portion of FIG. 1A, and FIG. 2B is an enlarged view of the IIB portion of FIG. 1A. FIG. 3 is a schematic perspective view illustrating a coating process of a sealing material for the liquid crystal display device according to the first embodiment. FIG. 4A is a plan view showing a shape immediately after application of the sealing material at the straight portion of Embodiment 1, and FIG. 4B is a plan view showing a shape immediately after application of the sealing material at the corner of Embodiment 1. FIG. 5A is a schematic diagram for explaining an application locus of the sealing material of the liquid crystal display device of Embodiment 1, and FIG. 5B is a schematic diagram for explaining a method for applying the sealing material of FIG. 5A. 6A is a schematic diagram for explaining the effect of the sealing material of the liquid crystal display device of Embodiment 1, and FIG. 6B is a schematic diagram for explaining the application state of the sealing material of FIG. 6A. 3 is a flowchart showing a manufacturing process of the liquid crystal display device of Embodiment 1. 8A is a view corresponding to FIG. 4A showing the application locus of the sealing material of the liquid crystal display device of the second embodiment, FIG. 8B of the third embodiment, and FIG. 8C of the fourth embodiment. FIG. 9A is a diagram corresponding to FIG. 4A showing the application locus of the sealing material of the liquid crystal display device of Embodiment 5 and FIG.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the embodiment and the drawings. However, the embodiments described below are described by taking, as an example, an FFS mode liquid crystal display device and a manufacturing method thereof for embodying the technical idea of the present invention, and the present invention is described in this embodiment. The present invention is not intended to be specific to the FFS mode liquid crystal display device and the manufacturing method thereof, and the present invention is equally applicable to other embodiments included in the scope of the claims. In each drawing used for the description in this specification, each layer and each member are displayed in different scales so that each layer and each member can be recognized on the drawing. However, it is not necessarily displayed in proportion to the actual dimensions.

[Embodiment 1]
First, the configuration of the liquid crystal display device 10 of Embodiment 1 will be described with reference to FIG. FIG.
As shown in FIG. 1A and FIG. 1B, the liquid crystal display device 10 of Embodiment 1 includes an array substrate 11 in which various wirings are formed on a first transparent substrate 12 made of glass or the like, and a second transparent substrate 15 made of glass or the like.
A color filter substrate 14 on which a color filter or the like is formed is disposed oppositely. The array substrate 11 and the color filter substrate 14 are bonded together by a sealing material 17, and a liquid crystal 30 is sealed in a space formed by the sealing material 17. A portion surrounded by the sealing material 17 and filled with the liquid crystal 30 is a display region 28, and an outside of the display region 28 is a non-display region 29. Note that the array substrate 11 has a color filter substrate 1 so that a predetermined space projecting portion is formed when the array substrate 11 is arranged opposite to the color filter substrate 14.
A size slightly larger than 4 is used. This overhanging portion is a mounting area 12a in which a driver IC 25 for driving the liquid crystal 30 is disposed.

On the first transparent substrate 12 such as glass, the array substrate 11 is formed by repeatedly forming and patterning a metal film, an insulating film, a resin film, etc., and various wirings such as signal lines and scanning lines, and thin film transistors as switching elements ( TFT: Thin Film Transistor, ITO (Indium Thin Oxide)
) And IZO (Indium Zinc Oxide), etc., a lower electrode made of a transparent conductive material, an interelectrode insulating film,
An upper electrode made of a transparent conductive material such as ITO or IZO, an alignment film, and the like are provided. In FIG. 1B, these are collectively referred to as the first structure 13. Further, a photospacer (not shown) is formed in the display area 28 of the array substrate 11 to maintain a cell gap between the two substrates. Then, the alignment film is subjected to a rubbing process, and the array substrate 1 according to the first embodiment.
1

Further, the color filter substrate 14 is formed by repeatedly forming and patterning a metal film, a resin film, an insulating film, etc. on the second transparent substrate 15 such as glass to form a light shielding layer, a color filter layer, an overcoat layer, an alignment film, etc. It is formed to provide. In FIG. 1B, these are collectively referred to as the second structure 16. Then, the alignment film is rubbed to form the color filter substrate 14 of the first embodiment.

Then, the sealing material 17 is applied along the periphery of the display area 28 of the array substrate 11 or the color filter substrate 14. The sealing material 17 is formed of a thermosetting or ultraviolet curable resin material. At this time, the sealing material 17 according to the liquid crystal display device 10 of Embodiment 1 is used.
Is formed in a so-called jagged shape as shown in FIG. 2A and FIG.
Concavities and convexities 24 are formed on the side surfaces of the sheet 7. The sealing material 17 is applied along the outer edge of the display area 28 of the array substrate 11, and a liquid crystal inlet 26 is formed in a part thereof.

The array substrate 11 and the color filter substrate 14 are bonded and integrated by a sealing material 17 applied over the outer periphery of the display region 28 in a state where the surfaces of the array substrate 11 and the color filter substrate 14 are arranged to face each other. Then, the liquid crystal 30 is injected from the liquid crystal injection port 26, the liquid crystal injection port 26 is sealed with the sealing material 27, and the driver IC 25 and the like are installed in the mounting region 12 a, whereby the liquid crystal display device 10 according to the first embodiment. It becomes.

Next, a manufacturing process of the liquid crystal display device according to the first embodiment will be described with reference to FIGS. FIG. 7 is a flowchart showing a manufacturing process of the liquid crystal display device 10 according to the first embodiment. In the following description, this is performed in light of this flowchart.

The AR mother substrate on the array substrate 11 side is formed as a metal film, an insulating film, a resin film, and the like on a transparent substrate 12 such as glass, and various patterns such as signal lines, scanning lines, and switching elements are repeated. A thin film transistor, a lower electrode made of a transparent conductive material such as ITO or IZO, an interelectrode insulating film, an upper electrode made of a transparent conductive material such as ITO or IZO, an alignment film, etc. Form to include. As described above, in FIG. 1B, these are collectively referred to as the structure 13. Then, the alignment film is rubbed to complete the AR mother substrate (step S1).

The CF mother substrate on the side of the color filter substrate 14 repeats the formation and patterning of a metal film, a resin film, an insulating film, etc. on a transparent substrate 15 such as glass, and a light shielding layer, a color filter layer, an overcoat layer, an orientation It is formed so as to have a film or the like. As described above, FIG. 1B
Then, these are collectively referred to as the structure 16. Then, the alignment film is rubbed and second
A mother substrate is completed (step S2).

Next, the sealing material 17 is applied to either the AR mother substrate or the CF mother substrate. In the following description, it is assumed that the sealing material 17 is applied to the AR mother substrate. At this time, in the manufacturing method of the liquid crystal display device 10 according to the first embodiment, unlike the conventional linear coating method,
Apply with an irregular application trajectory. The sealing material application process of Embodiment 1 is shown in FIGS.
Will be described with reference to FIG. In the following description, one array substrate formed on the AR mother substrate will be described as a representative.

As shown in FIG. 3, the sealing material 17 is applied in a predetermined application pattern using a dedicated seal dispenser 31 along the outer edge of the display area 28 of the array substrate 11, for example. At this time, the seal dispenser 31 is controlled to move in accordance with the formation pattern of the seal material 17 (step 3). As shown in FIG. 4A, the application pattern of the sealing material 17 according to the first embodiment is applied in a single stroke so that the application locus of the sealing material 17 becomes a repeating unit of the same length in an oblique direction. That is, the sealing material 17 applied in the first embodiment is
A part of the unit sealing material 18b to which the sealing material 17 is applied later is formed so as to form a portion 20 that contacts or overlaps with a part of the unit sealing material 18a that has been applied previously, and the overall shape is a so-called jagged shape. Become. At this time, application of the seal material 17 of the seal dispenser 31 is facilitated by applying the seal material 17 in a single stroke. In addition, the arrow shown to FIG. 4A is an example of an application | coating locus | trajectory.

Further, it is preferable that the application amount of the corner sealing material 19 is larger, and as shown in FIG. 4B, when the corner sealing material 19 is applied, it is repeatedly applied compared to the linear sealing material 18. By increasing the number of times to be performed and adjusting the thickness of the sealing material 17 to be thick, it is possible to suppress the sealing failure of the sealing material 19 at the corner portion where the sealing failure is likely to occur. 4B.
The arrows shown in FIG. 6 are examples of application trajectories of the corner sealing material 19.

Moreover, even if it apply | coats as shown to FIG. 5A, the area | region 21 which overlaps a part in the horizontal direction in the sealing material 17 will be made. When this overlapping region 21 is schematically shown, as shown in FIG. 5B, a single-coated portion 22 and a double-coated portion (overlapping region 21) are alternately formed. . The overlapping region 21 is formed without interruption in the lateral direction. In this way, for example, as shown in FIGS. 6A and 6B, even if a cut 23 is generated in a part of the sealing material 17, this overlapping region 21 exists, so this cut 2
In the portion 3, the adjacent sealing material 17 is present in the overlapping region 21.

Next, a process of bonding the AR mother substrate and the CF mother substrate is performed (step 4).
At this time, the sealing material 17 is pressure-bonded by the pressing force of the bonding of the AR mother substrate and the CF mother substrate, and the sealing material 17 is crushed so that the adjacent sealing materials 17 are more closely adhered to each other. Even if is formed, it can be closed.

Moreover, as the sealing material 17 applied by the manufacturing method of the liquid crystal display device 10 of Embodiment 1,
It is possible to apply a sealing material 17 that is thinner than a conventional sealing material. That is, as shown to FIG. 5A, the sealing material 17 apply | coated in Embodiment 1 can be apply | coated so that the width | variety 32 of the sealing material to which the conventional sealing material is applied may not protrude. This is because the portion 20 where a part of the sealing material 17 contacts or overlaps is formed by making the coating locus of the sealing material 17 so-called jagged, so that the sealing material is thinner than the application width of the conventional sealing material. This is because it is possible to suppress the seal breakage even if is used. Thereby, even if the application locus of the sealing material is irregular, it can be made substantially the same or less than the amount of use of the conventional sealing material.

Thereafter, the bonded mother substrate is divided and cut so as to become each liquid crystal display panel (step 5), and the liquid crystal 30 is injected from the liquid crystal injection port 26 (step 6).
Is sealed with a sealing material 27 (step 7), and the driver I is mounted on the mounting region 12a of the array substrate 11.
C25 etc. are installed, and the liquid crystal display device 10 of Embodiment 1 is completed (step 8).

As mentioned above, according to the manufacturing method of the liquid crystal display device of Embodiment 1, cutting | disconnection of a sealing material is suppressed,
It is possible to provide a liquid crystal display device in which problems such as liquid crystal leakage are suppressed.

[Embodiment 2]
In the manufacturing method of the liquid crystal display device of the first embodiment, the application path of the sealing material is set to be a repeating unit having the same length in the oblique direction. However, in the manufacturing method of the liquid crystal display device of the second embodiment, the sealing material The application locus is formed so as to be long and short repeating units in an oblique direction. In addition, since the manufacturing method of the liquid crystal display device of Embodiment 2 is different from the manufacturing method of the liquid crystal display device of Embodiment 1 only in the application locus of the sealing material, the same reference numerals are given to other common parts,
Detailed description is omitted.

As shown in FIG. 8A, in the method for manufacturing the liquid crystal display device 10A of the second embodiment, the sealing material 17A is used.
Is applied so as to be long and short repeating units in an oblique direction in a single stroke. That is,
Unlike the case of the sealing material 17 of the first embodiment, the sealing material 17A of the second embodiment applies the long sealing material 18c and the short sealing material 18d alternately. By forming in this way, the seal material 17A can reduce the amount of the seal material 17A used compared to the case of the first embodiment, and the long seal material 18c and the short seal material 18d are in contact with each other or overlap each other. Since the portion 20A can be formed, the same effects as those of the first embodiment can be obtained. In addition, the arrow shown to FIG. 8A is an example of the application locus | trajectory of the sealing material 17A.

[Embodiment 3]
In the manufacturing method of the liquid crystal display device of the first embodiment, the application path of the sealing material is set to be a repeating unit having the same length in the oblique direction. However, in the manufacturing method of the liquid crystal display device of the third embodiment, the sealing material The application locus is made to meander. The liquid crystal display device manufacturing method according to the third embodiment is different from the liquid crystal display device manufacturing method according to the first embodiment only in the application pattern of the sealing material. Detailed description will be omitted.

As shown in FIG. 8B, in the method for manufacturing the liquid crystal display device 10B of Embodiment 3, the sealing material 17 is used.
B is applied in a serpentine pattern in a single stroke. By adopting such a configuration, the sealing material 17B of the third embodiment applied in a meandering manner is different from the sealing material applied in a straight line, and the sealing material 17B has a horizontal direction 18e, a vertical direction 18f, and a horizontal direction. The direction 18g and the vertical direction 18h are repeatedly applied. By repeatedly applying in this way, the sealing material 17B applied in each direction has a portion 20B that contacts or overlaps with the adjacent sealing material. As a result, the sealing material 17B of Embodiment 3 covers and closes the portion where the cut has occurred by having the portion 20B that contacts or overlaps with the adjacent sealing material even if the sealing material is cut in part. be able to. Therefore, the manufacturing method of the liquid crystal display device of Embodiment 3 can also provide a liquid crystal display device in which the sealing material is prevented from being cut and problems such as liquid crystal leakage are suppressed. In addition, the arrow shown to FIG. 8B is an example of the application locus | trajectory of the sealing material 17B.

[Embodiment 4]
In the manufacturing method of the liquid crystal display device of the first embodiment, the application path of the sealing material is set to be a repeating unit having the same length in the oblique direction. However, in the manufacturing method of the liquid crystal display device of the fourth embodiment, the sealing material The application trajectory is arranged in an annular row. The liquid crystal display device manufacturing method according to the fourth embodiment is different from the liquid crystal display device manufacturing method according to the first embodiment only in the application pattern of the sealing material. Detailed description is omitted.

As shown in FIG. 8C, the seal material 17 </ b> C of the liquid crystal display device 10 </ b> C of Embodiment 4 forms an annular row by the seal dispenser 31 moving while drawing a circle. This annular row is formed by repeating the rectilinear portion 18i and the annular portion 18j. At this time, each annular portion 18j has a portion 20C in which a part thereof contacts or overlaps. By forming in this way, the annular portion 18j of the sealing material 17C necessarily has a portion that overlaps in the lateral direction, and further overlaps in the lateral direction by a portion 20C in which the annular portions 18j adjacent to the linear portion 18i contact or overlap each other. Since the portion is formed, the cutting of the sealing material 17C can be further suppressed. Therefore, the manufacturing method of the liquid crystal display device 10C according to the fourth embodiment can provide a liquid crystal display device in which problems such as liquid crystal leakage are suppressed.

In addition, in the manufacturing method of the liquid crystal display device of Embodiment 4, although the annular part was apply | coated to circular shape, not only this but elliptical shape may be sufficient. Moreover, the arrow shown to FIG. 8C is an example of the application locus | trajectory of the sealing material 17C.

[Embodiment 5]
In the manufacturing method of the liquid crystal display device 10 according to the first embodiment, the coating locus of the sealing material is applied in a single stroke so as to be a repetitive unit of the same length in the oblique direction, but the liquid crystal display device 10D according to the fifth embodiment. In this manufacturing method, the coating path of the sealing material is applied intermittently so as to be a repeating unit of the same length in the oblique direction. Note that the manufacturing method of the liquid crystal display device 10D of the fifth embodiment is different from the manufacturing method of the liquid crystal display device of the first embodiment only in the application path of the sealing material, and therefore other common parts are denoted by the same reference numerals, Detailed description is omitted.

As shown in FIG. 9A, in the method of manufacturing the liquid crystal display device 10D of Embodiment 5, the sealing material 17D is used.
Each of the sealing members 18k having the same length in the oblique direction is formed intermittently. By adopting such a configuration, the sealing material 17D can reduce the amount of the sealing material used as compared with the case of the first embodiment, and can reduce the manufacturing cost. Furthermore, unlike a one-stroke writing, it does not overlap in the vertical direction, so a stable amount of sealing material can be applied, and extra sealing material penetrates into the outside of the substrate or the display area when the substrates are bonded together. This can be suppressed. In addition, the arrow shown to FIG. 9A is an example of the application locus | trajectory of the sealing material 17D.

Therefore, the liquid layer display device 1 manufactured by the method for manufacturing the liquid crystal display device 10D of the fifth embodiment.
0D can provide a liquid crystal display device that suppresses disconnection of the sealing material 17D, suppresses problems such as liquid crystal leakage, suppresses the sticking of the sealing material itself, and suppresses display defects.

[Embodiment 6]
In the manufacturing method of the liquid crystal display device 10A of the second embodiment, the coating locus of the sealing material is applied in a single stroke so as to be a long and short repeating unit in an oblique direction. However, the manufacturing of the liquid crystal display device 10E of the sixth embodiment is performed. In the method, the coating locus of the sealing material is intermittently applied so as to be a long and short repeating unit in an oblique direction. In addition, since the manufacturing method of the liquid crystal display device 10E of Embodiment 6 differs only in the coating pattern of a sealing material compared with the manufacturing method of the liquid crystal display device 10 of Embodiment 1, the same code | symbol is used for another common part. A detailed description will be omitted.

As shown in FIG. 9B, in the manufacturing method of the liquid crystal display device 10E of the sixth embodiment, the sealing material 17E.
Is applied intermittently so as to be long and short repeating units in an oblique direction. That is, the sealing material 17E of Embodiment 6 applies the longer sealing material 18m and the shorter sealing material 18n alternately and intermittently. By forming in this way, the amount of the sealing material used can be further reduced as compared with the manufacturing method of the liquid crystal display device 10D of the fifth embodiment, and the fifth embodiment.
The effect of this invention can be produced. In addition, the arrow shown to FIG. 9B is an example of the application locus | trajectory of the sealing material 17E.

In the above embodiment, the case where the liquid crystal injection port is formed to inject the liquid crystal and the vacuum injection method is used has been described. However, the present invention is not limited to this, and the liquid crystal dropping method is used by forming the sealing material in a loop shape. Even if it is applied, the same effects of the invention can be obtained.

Moreover, although the case where the sealing material was applied in a single stroke or intermittently was described in the above embodiment, the present invention is not limited to this, and a single stroke may be combined with intermittent application. This is particularly effective for corner application.

10, 10A to 10E: Liquid crystal display device 11: Array substrate 12: First transparent substrate 12a
: Mounting area 13: First structure 14: Color filter substrate 15: Second transparent substrate 1
6: 2nd structure 17, 17A-17E: Sealing material 18: Straight part of sealing material 19: Corner part of sealing material 20: Contact or overlapping part 21: Overlapping area 22: Single area 23: Out of seal 24: Concavities and convexities 25: Driver IC 26: Liquid crystal injection port 27: Sealing material 28: Display area 29: Non-display area 30: Liquid crystal 31: Seal dispenser
32: Conventional sealant width

Claims (11)

A first step of preparing a pair of substrates for a liquid crystal display panel;
A second step of applying a sealant to a predetermined application pattern using a seal dispenser around the display area of one of the pair of substrates;
A third step of bonding the pair of substrates;
In the method of manufacturing a liquid crystal display device, the seal dispenser is moved so that a part where the application path of the sealant is applied after the sealant comes into contact with or overlaps with the previously applied part. A method of manufacturing a liquid crystal display device, characterized in that the liquid crystal display device is formed. 2. The liquid crystal display according to claim 1, wherein the predetermined application pattern is formed while moving the seal dispenser so that an application locus of the seal material is at least one of meandering, skewing, and circles. Device manufacturing method. 2. The liquid crystal display device according to claim 1, wherein the predetermined application pattern is formed while moving the seal dispenser so that an application locus of the seal material is a repeating unit having the same length in an oblique direction. Manufacturing method. 2. The liquid crystal display device according to claim 1, wherein the predetermined application pattern is formed while the seal dispenser is moved so that an application locus of the seal material is a long and short repeating unit in an oblique direction. Method. 2. The method of manufacturing a liquid crystal display device according to claim 1, wherein the predetermined application pattern is formed while the seal dispenser is moved so that an application locus of the seal material is an annular line. The method of manufacturing a liquid crystal display device according to claim 1, wherein the application path of the sealing material is a one-stroke writing shape. The method for manufacturing a liquid crystal display device according to claim 1, wherein the coating locus of the sealing material is intermittent. The method for manufacturing a liquid crystal display device according to claim 1, wherein an application locus of the sealing material is narrower than the predetermined application pattern. The method for manufacturing a liquid crystal display device according to claim 1, wherein an application amount of the sealing material is increased in a corner portion of the application pattern as compared with a linear portion. The method for manufacturing a liquid crystal display device according to claim 1, wherein the sealing material is a resin material. The width of the sealing material of the predetermined coating pattern produced by the method for manufacturing a liquid crystal display device according to any one of claims 1 to 10 changes randomly, and the sealing material has irregularities formed on side surfaces. A liquid crystal display device characterized by the above.

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