JP2010044136A - Liquid crystal display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display panel wherein a display defect due to too much sealing material which comes in can be effectively suppressed. <P>SOLUTION: In the liquid crystal display panel 10A including a pair of substrates AR and CF for the liquid crystal display panel, a sealing material 30 enclosing a peripheral part of the pair of substrates AR and CF except a liquid crystal injection port 31, a columnar spacer 41 disposed between the pair of substrates AR and CF, a liquid crystal LC encapsulated in a region enclosed by the sealing material 30 and a capping material 33 capping the liquid crystal injection port 31, a bent part 30a is provided at a part of the liquid crystal injection port 31 of the sealing material 30, one or a plurality of barriers 40A having a length equal to or shorter than the width of the liquid crystal injection port 31 and a height lower than the gap GP between the pair of substrates AR and CF are formed in the width direction of the liquid crystal injection port 31 along the shape of the bent part 30a of the sealing material 30, and the barriers 40A are formed on the inner side of the end part of the substrates AR and CF. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a liquid crystal display panel, and more particularly to a liquid crystal display panel in which a sealing material for sealing a liquid crystal injection port is prevented from excessively entering a display region.

A liquid crystal display panel is usually bonded with a sealing material interposed between a pair of substrates, a space is formed between these substrates, liquid crystal is injected into this space from a liquid crystal injection port provided in advance, and It is manufactured by sealing the liquid crystal inlet. However, when sealing the liquid crystal injection port in the manufacturing process of the liquid crystal display panel, the amount of the sealing material that enters the liquid crystal injection port increases with time, but the liquid crystal display panel that has entered excessively is a product as uneven injection port. It causes a defect.

In order to solve such problems, Patent Document 1 below discloses an invention in which a predetermined end portion of the alignment film is extended to the same surface as the wall surface on the liquid crystal inlet side of the sealing material damming portion. It is disclosed. The configuration of the liquid crystal display device disclosed in Patent Document 1 will be described with reference to FIG.

9A is a plan view of the main part of the liquid crystal display device disclosed in Patent Document 1 below, and FIG. 9B is a plan view of FIG. 9A.
It is sectional drawing of the IXB-IXB line | wire of the liquid crystal display device.

The liquid crystal display device 60 includes two film substrates 61 and 62. A transparent electrode 63 and an alignment film 64 are provided in the display area on the upper surface of the lower film substrate 61, and a sealing material 66 having a liquid crystal injection port 65 is provided outside the alignment film 64, and the alignment film 64 and the liquid crystal injection port A sealing material damming portion 67 made of the same material as that of the sealing material 66 is provided between 65 and 65. A transparent electrode 68 and an alignment film 69 are provided in the display area on the lower surface of the upper film substrate 62. The two film substrates 61 and 62 are bonded to each other through the sealing material 66 and the sealing material damming portion 67 with the spacer 70 interposed therebetween, and between the two film substrates 61 and 62 inside the sealing material 66. The liquid crystal 71 is injected through the liquid crystal injection port 65, and then the liquid crystal injection port 65 is sealed with the sealing material 72. Further, in the liquid crystal display device 60, each predetermined one end portion of the alignment films 64 and 69 extends to the same surface as the wall surface of the sealing material damming portion 67 on the liquid crystal inlet 65 side.

According to the invention of the liquid crystal display device disclosed in Patent Document 1, the sealing material damming portion 67 is provided.
Can provide a sealing material damming function to predetermined end surfaces of the alignment films 64 and 69 that form the same surface as the wall surface on the liquid crystal injection port 72 side, so that the sealing material enters the display region. There is an effect that it can be avoided.
JP-A-7-318956 (FIG. 1, paragraphs [0002], [0006] to [0008])

However, the sealing material blocking portion 67 in the liquid crystal display device 60 disclosed in Patent Document 1 is formed at the boundary between the display region and the non-display region where the liquid crystal injection port 65 is formed. . Therefore, in the liquid crystal display device 60 of Patent Document 1, even if the sealing material 65 is dammed at the boundary between the display area and the non-display area, the sealing material is displayed on both sides of the sealing material damming portion 67 on the display area side. Therefore, a display defect occurs.

The present invention has been made in order to solve such problems of the prior art, and an object of the present invention is to provide a liquid crystal display panel that effectively suppresses display defects due to excessive penetration of a sealing material. It is in.

In order to achieve the above object, a liquid crystal display panel of the present invention includes a pair of substrates for a liquid crystal display panel, and a peripheral portion of the pair of substrates is surrounded by a sealing material except for a liquid crystal inlet portion,
A columnar spacer is disposed on one of the pair of substrates, a liquid crystal is sealed in a region surrounded by the sealing material, and the liquid crystal injection port is sealed with a sealing material,
The liquid crystal inlet portion of the seal material is provided with a bent portion,
In the width direction of the liquid crystal inlet, the length is the same as or shorter than the width of the liquid crystal inlet,
One or more barriers are formed along the shape of the bent portion of the sealing material that is lower than the gap between the pair of substrates,
The barrier is formed on the inner side than the end of the substrate.

In the liquid crystal display panel of the present invention, since the barrier is formed along the shape of the bent portion of the sealing material forming the liquid crystal injection port, the entrance region of the liquid crystal injection port away from the display region from the display region It can be suppressed in the vicinity. Therefore, according to the liquid crystal display panel of the present invention, display unevenness due to the entry of the sealing material into the display region can be suppressed. Further, in order to securely seal the liquid crystal injection port, the sealing material needs to enter the liquid crystal display panel to some extent. According to the liquid crystal display panel of the present invention, since the end portion of the barrier is formed inside the end portion of the liquid crystal display panel, the sealing material is sufficiently provided between the end portion of the liquid crystal display panel and the barrier. Since it can enter, sealing can be performed reliably.

In the liquid crystal display panel of the present invention, it is preferable that the barrier is formed with a certain gap from the bent portion of the sealing material.

When the pair of substrates of the liquid crystal display panel is bonded, if there is no gap between the barrier and the sealing material, the barrier and the sealing material may overlap when the position where the sealing material is applied shifts. A gap failure may occur. However, according to the liquid crystal display panel of the present invention, since a certain gap is opened between the barrier and the sealing material, the sealing material does not overlap the barrier and the possibility of a gap failure is reduced. it can.

In the liquid crystal display panel of the present invention, it is preferable that the barrier has a stepped shape that becomes higher from the end of the substrate toward the inner side.

When the barrier has a stepped shape that becomes higher from the end of the substrate toward the inner side, the sealing material easily enters on the end side of the substrate, and the sealing material becomes difficult to enter as it goes into the substrate. Therefore, according to the liquid crystal display panel of the present invention, the sealing material can surely enter at the entrance side of the liquid crystal inlet, and further, the entry into the display area where the display defect is desired to be prevented can be reliably suppressed. become able to. Note that such a step-like barrier that becomes higher from the end of the substrate to the inner side is formed by using a multi-tone mask such as a half-tone mask or a gray-tone mask when forming the barrier using a photosensitive resin. By using it, it can be formed easily.

In the liquid crystal display panel of the present invention, it is preferable that the barrier is made of the same material as that for forming the columnar spacer.

According to the liquid crystal display panel of the present invention, since the barrier can be formed in the same process as the columnar spacer, it is not necessary to increase a special manufacturing process for forming the barrier, and the barrier can be easily formed. Will be able to.

In the liquid crystal display panel of the present invention, the barriers are alternately formed so as not to overlap each of the pair of substrates in a plan view, with a gap between the barriers,
The barrier formed on one side of the pair of substrates is formed of the same material as the columnar spacer, and the barrier formed on the other side of the pair of substrates is the same material as the planarization film formed on the pair of substrates. Further, it is preferable that the height of the barrier formed on each of the pair of substrates is not higher than half of the gap between the pair of substrates.

In the liquid crystal display panel of the present invention, since the barrier is formed on both sides of the liquid crystal injection port formed on the pair of substrates, the sealing material applied to the liquid crystal injection side is on the back side of the liquid crystal injection port. Difficult to penetrate. Therefore, according to the liquid crystal display panel of the present invention, the sealing material can surely enter the liquid crystal injection port on the inlet side of the liquid crystal injection port, and further, the sealing material can be removed at a position where it is desired to prevent display defects. Intrusion can be reliably suppressed. In addition, since the barrier can be formed on both the pair of substrates, the degree of freedom in designing the barrier formation is increased. In addition, since the barrier can be formed in the same step as the step of forming the columnar spacer and the planarizing film, it is not necessary to increase a special manufacturing process, and the barrier can be easily formed.

Hereinafter, the best embodiment of the present invention will be described with reference to the drawings. However, the embodiment shown below exemplifies a liquid crystal display panel for embodying the technical idea of the present invention, and is not intended to specify the present invention for this liquid crystal display panel. Other embodiments within the scope of the claims are equally applicable. Also, 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.

FIG. 1 is a plan view of a liquid crystal display panel according to Embodiment 1 of the present invention. FIG. 2 is an enlarged plan view showing an enlarged one pixel region of the array substrate of the liquid crystal display panel of FIG. FIG. 3 shows the structure of FIG.
It is sectional drawing cut | disconnected by the -III line. 4A is an enlarged view through the color filter substrate of the IVA portion of the liquid crystal display panel shown in FIG. 1, and FIG. 4B is a sectional view taken along line IVB-IVB in FIG. 4A.
FIG. 4C is an enlarged view of the IVC portion of FIG. 4A. 5A is an enlarged view of a portion corresponding to FIG. 4A of the liquid crystal display panel according to Embodiment 2 of the present invention, FIG. 5B is a cross-sectional view corresponding to FIG. 4B,
FIG. 5C is an enlarged view of a portion corresponding to FIG. 4C. 6A is an enlarged view of a portion corresponding to FIG. 4A of a liquid crystal display panel according to Embodiment 3 of the present invention, FIG. 6B is a cross-sectional view corresponding to FIG. 4B, and FIG. 6C is a portion corresponding to FIG. It is an enlarged view. 7A is an enlarged view of a portion corresponding to FIG. 4A of the liquid crystal display panel according to Embodiment 4 of the present invention, FIG. 7B is a cross-sectional view corresponding to FIG. 4B, and FIG. 7C is a portion corresponding to FIG. It is an enlarged view. 8A is an enlarged view of a portion corresponding to FIG. 4A of a liquid crystal display panel according to Embodiment 5 of the present invention, FIG. 8B is a cross-sectional view corresponding to FIG. 4B, and FIG. 8C is a portion corresponding to FIG. It is an enlarged view.

[Embodiment 1]
A liquid crystal display panel 10A according to Embodiment 1 of the present invention will be described with reference to FIGS. The liquid crystal display panel 10A is enclosed in an area surrounded by the array substrate AR, the color filter substrate CF, the sealing material 30 for bonding the substrates AR, CF, and the array substrate AR, the color filter substrate CF, and the sealing material 30. So-called C composed of liquid crystal LC
This is an OG (Chip On Glass) type liquid crystal display panel.

The array substrate AR is obtained by forming various wirings for driving liquid crystal in the display area DA formed on the surface of the rectangular glass substrate 11. This array substrate AR is a color filter substrate C.
The length in the longitudinal direction is longer than that of F, and an extended portion 11a extending to the outside when the two substrates AR and CF are bonded together is formed. The extended portion 11a is driven. A driver Dr including an IC chip or an LSI that outputs a signal is provided.

In the display area DA of the array substrate AR, a plurality of scanning lines 12 extending in the lateral direction on the glass substrate 11, auxiliary capacitance lines 14 positioned between the plurality of scanning lines 12, and the scanning lines 12 are extended. The existing gate electrode G and the auxiliary capacitance electrode 14 formed by expanding a part of the auxiliary capacitance line 14.
a is formed. Further, common wiring and various lead wirings are formed around the display area DA, but they are not shown. Further, a gate insulating film 17 having a predetermined thickness is formed so as to cover the glass substrate 11 on which the scanning lines 12 and the auxiliary capacitance lines 14 are formed. The gate insulating film 17 is made of a transparent inorganic insulating material such as silicon oxide or silicon nitride.

Further, a TFT (Thin Film Transistor) is formed so as to cover the gate electrode G on the gate insulating film 17.
), A semiconductor layer 15 made of, for example, amorphous silicon (a-Si) is formed. On the surface of the gate insulating film 17, a plurality of signal lines 13 extending in a direction crossing the scanning line 12, a source electrode S extending from the signal line 13 and connected to the semiconductor layer 15, and an auxiliary capacitance electrode 14a A drain electrode D that covers the top and has one end connected to the semiconductor layer 15 is patterned. Thereby, the scanning line 12 and the signal line 13 of the glass substrate 11 are obtained.
A TFT 16 serving as a switching element is formed in the vicinity of the intersection with the. A region surrounded by the plurality of scanning lines 12 and signal lines 13 forms one sub-pixel region PA.

Further, a protective insulating film (passivation film) 18 made of an inorganic insulating material such as silicon oxide or silicon nitride for surface stabilization is formed on the glass substrate 11 so as to cover these various wirings. Then, one sub-pixel area PA surrounded by the scanning line 12 and the signal line 13
Each pixel electrode 19 made of a transparent conductive material such as ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide) is formed. Note that a contact hole CH for electrically connecting the pixel electrode 19 and the drain electrode D is provided in a portion of the protective insulating film 18 located on the auxiliary capacitance electrode 14a. Further, an alignment film (not shown) is applied to the surface of the glass substrate 11 on which various wirings are formed, and the surface of the alignment film is rubbed using, for example, a rubbing roller.

On the other hand, the color filter substrate CF is obtained by forming various wirings on the surface of the rectangular glass substrate 21. In the display area DA of the color filter substrate CF, the light shielding member 22 provided in a matrix in accordance with the pixel area PA of the array substrate AR, and the area surrounded by the light shielding member 22 are red (R), green ( A color filter layer 23 of G), blue (B), or the like is formed. A common electrode 24 made of, for example, ITO or IZO is provided so as to cover these color filter layers 23. Further, the frame portion of the color filter substrate CF is shielded from light by extending the light shielding member 22 in order to suppress light leakage (see FIG. 4B). Further, a barrier 40A is formed at a predetermined position of the liquid crystal injection port 31.
A detailed configuration of A will be described later. An alignment film (not shown) is applied to the surface of the glass substrate 21 on which various wirings are formed, and the surface is rubbed using, for example, a rubbing roller.

The array substrate AR and the color filter substrate CF described above are applied and bonded together so as to cover the outer periphery of the display area DA. As the sealing material 30, a thermosetting or ultraviolet curable resin material such as an epoxy resin is used. This sealing material 3
For example, 0 is applied along the outer edge of the display area DA of the array substrate AR, and a part thereof extends toward the side edge of the array substrate AR in order to form the liquid crystal injection port 31 (
(See FIG. 1). In FIG. 1, the position where the liquid crystal injection port 31 is formed is formed at substantially the central portion of the short side facing the short side of the array substrate AR where the driver Dr is formed. However,
It is also possible to provide the other portion, for example, at the corner of one of the long sides of the array substrate AR.

Thereafter, the surfaces of both the substrates AR and CF are bonded to each other, and the sealing material 30 is cured to form an empty cell. Next, liquid crystal LC is injected into the empty cell from the liquid crystal injection port 31. Then, after the liquid crystal LC is injected, the liquid crystal injection port 31 is sealed with the sealing material 32. Thereafter, by attaching a polarizing plate, a driver Dr, and the like, the liquid crystal display panel 10A according to the first embodiment is completed.

Next, specific configurations of the barrier 40A and the liquid crystal injection port 31 of the liquid crystal display panel according to Embodiment 1 of the present invention will be described with reference to FIG. The liquid crystal injection port 31 has an opening 3 having a predetermined opening width.
1a, a pair of opposing side walls 31c, 31d extending from both ends of the opening 31a in a predetermined length in the direction of the internal space is formed of a sealing material 30, and an introduction path through which liquid crystal is injected between the opposing side walls 31c, 31d 31b. Further, a bent portion 30a is provided in the sealing material 30 at the introduction path 31b portion of the liquid crystal injection port 31, and a barrier 40A for suppressing the entry of the sealing material 33 is formed in the introduction path 31b. The barrier 40A has a predetermined height and width, and is formed along the shape of the bent portion 30a of the sealing material 30. The height WA of the barrier 40A
Is formed at a height of 50% to 80% of the gap GP between the substrates. If the height WA of the barrier 40A exceeds 80% of the gap GP, the liquid crystal injection process becomes too slow and the liquid crystal injection process takes too much time. Further, when the height WA of the barrier 40A is less than 50% of the gap GP, a difference from the case where the barrier 40A is not provided is less likely to occur. The barrier 40A can suppress the sealing material 33 from excessively entering the display area DA, and can maintain good display quality.

Further, the barrier 40A is formed on the inner side of the end portion of the substrate, specifically, on the inner side of the end portion of the substrate by 0.1 mm or more. By forming the barrier 40 </ b> A inward from the end of the substrate in this way, a space 32 (hereinafter referred to as a sealing material storage portion 32) for storing the sealing material 33 in the liquid crystal injection port 31 is formed. Therefore, according to the liquid crystal display panel 10 </ b> A according to the first embodiment of the present invention, the sealing material 33 sufficient to seal the liquid crystal injection port 31 can enter the sealing material storage portion 32. The injection port 31 can be reliably sealed. In addition, since the barrier 40A is formed along the shape of the bent portion 30a of the sealing material 30 forming the liquid crystal injection port 31, the entrance region of the sealing material 33 is separated from the display region DA. It can be suppressed near the entrance. Therefore, according to the liquid crystal display panel 10A according to the first embodiment of the present invention,
Display unevenness due to the sealing material 33 entering the display area DA can be suppressed.

When the columnar spacer 41 is formed on the color filter substrate CF, the barrier 40A can be formed using the same material as the columnar spacer 41 on the light shielding member 22 in the frame region portion of the color filter substrate CF. Thus, the barrier 40A can be easily formed without adding special materials and processes.

In the liquid crystal display panel 10A according to Embodiment 1 of the present invention, the barrier 40A is
As shown in FIG. 4C, a certain gap SP is formed between the bent portion 30 a of the sealing material 30. Thus, by providing a certain gap SP between the barrier 40A and the sealing material 30, even when the coating unevenness of the sealing material 30 occurs, the barrier 40A and the sealing material 30 Therefore, it is possible to reduce the possibility that a gap defect will occur.

[Embodiment 2]
Next, a liquid crystal display panel 10B according to Embodiment 2 of the present invention will be described with reference to FIG. The liquid crystal display panel 10B according to the second embodiment is the same as the liquid crystal display panel 10A according to the first embodiment because the liquid crystal display panel 10B according to the first embodiment is the same as the liquid crystal display panel 10A according to the first embodiment except for the configuration of the barriers. The same reference numerals are assigned to those having the structure, and detailed description thereof is omitted.

The liquid crystal injection port 31 of the liquid crystal display panel 10B according to the second embodiment has a barrier 40 serving as a wall portion.
B and the space 40B ′ are formed in a staggered pattern at regular intervals. Also, the height W of the barrier 40B
B is formed at a height of 50% to 80% of the gap GP between the substrates. With such a structure, the sealing material 3 is placed in the space 40B ′ existing between the barriers 40B when the sealing material 33 is injected.
3 enters, this space 40B ′ acts as a resistance against the entry of the sealing material 33 into the substrate. Therefore, according to the liquid crystal display panel 10B according to the second embodiment, the entry of the sealing material 33 can be further suppressed as compared with the liquid crystal display panel 10A of the first embodiment, and the liquid crystal display panel 10B having better display quality. Is obtained.

The barrier 40B is formed on the inner side of the end portion of the substrate, specifically, on the inner side of the end portion of the substrate by 0.1 mm or more, like the liquid crystal display panel 10A of the first embodiment. By forming the barrier 40B in this manner, the sealing material storage portion 32 is formed in the liquid crystal injection port 31, and a sufficient sealing material 33 for sealing the liquid crystal injection port 31 is provided inside the liquid crystal display panel 10B. Since it can enter, sealing can be performed reliably.

Further, the barrier 40B is formed on the light shielding member 22 in the frame region portion of the color filter substrate CF when the columnar spacer 41 is formed on the color filter substrate CF, as in the case of the liquid display panel 10A of the first embodiment. It can be formed using the same material as the columnar spacer 41. Thereby, the barrier 40B can be easily formed without adding a special material and process.

Further, the barrier 40B is formed such that a certain gap SP is provided between the bent portion 30a of the sealing material 30 as shown in FIG. 5C. Thus, the barrier 40B and the sealing material 30
By providing a certain gap SP between the two substrates AR and CF, the barrier 40B is bonded.
And the sealing material 30 do not overlap each other, and the possibility that a gap defect will occur can be reduced.

[Embodiment 3]
Next, a liquid crystal display panel 10C according to Embodiment 3 of the present invention will be described with reference to FIG. The liquid crystal display panel 10C according to the third embodiment is the same as the liquid crystal display panel 10A according to the first embodiment because the liquid crystal display panel 10C according to the first embodiment is the same as the liquid crystal display panel 10A according to the first embodiment except for the configuration of the barriers. The same reference numerals are assigned to those having the structure, and detailed description thereof is omitted.

The liquid crystal injection port 31 of the liquid crystal display panel 10C according to the third embodiment includes a barrier 40C that serves as a wall.
And the space 40C ′ are formed in a slit shape at regular intervals. The height WC of the barrier 40C is formed to be 50% to 80% of the gap GP between the substrates. With such a structure, since the sealing material 33 enters the space 40C ′ existing between the barriers 40C when the sealing material 33 is injected, the space 40C ′ enters the sealing material 33 into the substrate. Acts as a resistance. Therefore, according to the liquid crystal display panel 10C according to the third embodiment, the entry of the sealing material 33 can be further suppressed as compared with the liquid crystal display panel 10A according to the first embodiment, and thus a liquid crystal display panel with better display quality. 10C is obtained.

In addition, the barrier 40 formed in a staggered pattern in the liquid crystal display panel 10B according to the second embodiment.
In B, when the sealing material 33 enters when the sealing material 33 is injected while air remains in the space 40B ′, there is a possibility that air will not escape and bubbles may be generated. However, Embodiment 3
In the liquid crystal display panel 10C according to the above, since there are air passages at both ends of the barrier 40C in the space 40C ′, the generation of bubbles can be suppressed, and as shown in FIG. 6C, the barrier 4
Since there is a gap SP between 0C and the sealing material 30, no air remains in this portion, and no bubbles are generated.

Further, the barrier 40C is formed inside the end of the substrate, specifically, 0.1 mm or more from the end of the substrate, like the liquid crystal display panel 10A of the first embodiment. By forming the barrier 40 </ b> C in this manner, the sealing material storage portion 32 is formed in the liquid crystal injection port 31, and the sealing material 33 sufficient to seal the liquid crystal injection port 31 is formed in the sealing material storage portion 32. Since the liquid can be penetrated, the liquid crystal injection port 31 can be reliably sealed.

Further, the barrier 40C is columnar on the light shielding member 22 in the frame region portion of the color filter substrate CF when the columnar spacer 41 is formed on the color filter substrate CF, as in the case of the liquid crystal display panel 10A of the first embodiment. It can be formed using the same material as the spacer 41.
Thereby, the barrier 40C can be easily formed without adding a special material and process.

Further, the barrier 40C is formed such that a certain gap SP is provided between the bent portion 30a of the sealing material 30 as shown in FIG. 6C. Thus, the barrier 40C and the sealing material 30
By providing a certain gap SP between the two substrates AR and CF, the barrier 40C is bonded.
And the sealing material 30 do not overlap each other, and the possibility that a gap defect will occur can be reduced.

[Embodiment 4]
Next, a liquid crystal display panel 10D according to Embodiment 4 of the present invention will be described with reference to FIG. The liquid crystal display panel 10D according to the fourth embodiment is the same as the liquid crystal display panel 10A according to the first embodiment because the liquid crystal display panel 10D according to the first embodiment is the same as the liquid crystal display panel 10A according to the first embodiment except for the configuration of the barriers. The same reference numerals are assigned to those having the structure, and detailed description thereof is omitted.

The liquid crystal injection port 31 of the liquid crystal display panel 10D according to the fourth embodiment has a barrier 40 serving as a wall portion.
D ₁ to 40D ₅ (also collectively referred to as 40D) and the space 40D ′ are formed in a slit shape at regular intervals. The height of the barrier 40D, as the innermost barrier height 40D ₁ of the substrate is formed of 50% to 80% of the height of the gap GP between the substrates, toward the end portion from the inside of the substrate WD ₂ , WD ₃ , WD ₄ , WD _5, and the height decreases in the order of stepped steps. With such a configuration, when the sealing material 33 is injected, the space 40 existing between the barriers 40D.
Since the sealing material 33 enters D ′, the space 40D ′ acts as a resistance against the penetration of the sealing material 33 into the substrate. Therefore, the liquid crystal display panel 10D according to the fourth embodiment is
As compared with the liquid crystal display panel 10A of the first embodiment, the entrapment of the sealing material 33 can be further suppressed.

Further, the barrier 40D of the liquid crystal display panel 10D according to the fourth embodiment is the same as the liquid crystal display panel 10C according to the third embodiment in that the barrier 40D is formed in a slit shape, but the liquid crystal according to the third embodiment. While the barriers 40C of the display panel 10C are all formed at the same height, they are stepped so that the height increases from the edge of the substrate toward the inside. Therefore, in the liquid crystal display panel 10D according to the fourth embodiment, the inlet portion of the liquid crystal inlet 31 can be enter the sealing material 33 sufficiently due to the low height of the barrier 40D _5, innermost from the edge of the substrate since the barrier 40D ₁ of the highest height, it can be reliably suppressed from entering into the display area DA of the sealing material 33.

Further, the barrier 40D is formed on the inner side of the end portion of the substrate, specifically, on the inner side of the end portion of the substrate by 0.1 mm or more, like the liquid crystal display panel 10A of the first embodiment. By forming the barrier 40 </ b> D in this manner, the sealing material storage portion 32 is formed in the liquid crystal injection port 31, and the sealing material 33 sufficient to seal the liquid crystal injection port 31 is formed in the sealing material storage portion 32. Since the liquid can be penetrated, the liquid crystal injection port 31 can be reliably sealed.

Further, the barrier 40D can be formed using the same material as the columnar spacer 41 on the light shielding member 22 in the frame region portion of the color filter substrate CF when the columnar spacer 41 is formed on the color filter substrate CF. Accordingly, the barrier 40D can be easily formed without adding a special material and process. In addition, such a barrier 40D having a different height
_{1 to} 40D ₅ are easily formed simultaneously by using a multi-tone mask such as a halftone mask or a gray tone mask when the columnar spacer 41 and the barriers 40D _{1 to} 40D ₅ are formed using a photosensitive resin. be able to.

Further, the barrier 40D is formed such that a certain gap SP is provided between the bent portion 30a of the sealing material 30 as shown in FIG. 7C. Thus, the barrier 40D and the sealing material 30
By providing a constant gap SP between the two substrates AR and CF, the barrier 40D is bonded.
And the sealing material 30 do not overlap each other, and the possibility that a gap defect will occur can be reduced.

[Embodiment 5]
Next, a liquid crystal display panel 10E according to Embodiment 5 of the present invention will be described with reference to FIG. The liquid crystal display panel 10E according to the fifth embodiment is different from the liquid crystal display panel 10A according to the first embodiment in the configuration of barriers, and the other structures are the same except that the planarizing film 50 is formed on the array substrate AR. Therefore, the same components as those of the liquid crystal display panel 10A according to the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

First, the liquid crystal display panel 10E according to the fifth embodiment, the liquid crystal injection port 31 becomes the wall to the barrier 40E ₁ and 40E ₂ (collectively referred to as 40E in) the space 40E _'1 and 40E' ₂ (collectively 40E Are also formed into slits at regular intervals. However, in the liquid crystal display panel 10E according to the fifth exemplary embodiment, as illustrated in FIG. 8B, all the barriers are not formed in the color filter substrate CF as in the liquid crystal display panel 10C of the third exemplary embodiment. The substrate AR and the color filter substrate CF are alternately formed at regular intervals. Furthermore, a planarizing film 50 is formed on the surface of the passivation film 18 on the array substrate AR, and a pixel electrode 19 is formed on the surface of the planarizing film 50.

Further, the heights WE ₁ and WE ₂ of the barrier 40E do not exceed half of the gap GP between the substrates, and further the barrier 40E ₁ on the color filter substrate CF side and the array substrate AR side. The gap GP _E with the barrier 40E ₂ is formed to be substantially the same as the thickness of the color filter layer 23 formed on the color filter substrate CF.

By making such a structure, while reliably injecting the sealing material into the liquid crystal injection port,
The entry of the sealing material into the display area can be reliably suppressed by the barrier formed on both substrates.

Further, similarly to the liquid crystal display panel 10A of the first embodiment, the barrier 40E is formed on the inner side of the end portion of the substrate, specifically, on the inner side of the end portion of the substrate by 0.1 mm or more. By forming the barrier 40E in this way, the sealing material reservoir 32 is formed in the liquid crystal injection port 31,
Since a sufficient sealing material 33 for sealing the liquid crystal injection port 31 can enter the sealing material storage portion 32, the liquid crystal injection port 31 can be reliably sealed.

Also, among the barrier 40E, a color filter barrier 40E ₁ substrate CF side when forming the columnar spacers 41 on the color filter substrate CF, a color filter substrate CF columnar spacers 41 on the light-shielding member 22 of the frame area portion of the it can be formed simultaneously by forming a barrier 40E ₁ using the same material as the. Further, the barrier 40E ₂ of the array substrate AR side when forming the flattening film 50 on the array substrate AR, barrier 40E of the same material as the flattening film 50 over the protective insulating film 18 of the frame region portions of the array substrate AR ₂ can be formed simultaneously. Therefore, according to the liquid crystal display panel 10E of Embodiment 5, the barrier 40E can be easily formed without adding a special material and process.

Further, the barrier 40E is formed such that a certain gap SP is provided between the bent portion 30a of the sealing material 30 as shown in FIG. 8C. Thus, the barrier 40E and the sealing material 30
By providing a certain gap SP between the two substrates AR and CF, the barrier 40E is bonded.
And the sealing material 30 do not overlap each other, and the possibility that a gap defect will occur can be reduced.

In the first to fifth embodiments, the so-called vertical electric field type liquid crystal display panels 10A to 10E in which the common electrode 24 is formed on the color filter substrate CF have been described. However, in the present invention, both the common electrode and the pixel electrode are used. FFS mode or IP formed on the array substrate
The present invention is also applicable to a horizontal electric field type liquid crystal display panel such as an S mode.

FIG. 1 is a plan view of a liquid crystal display panel according to Embodiment 1 of the present invention. FIG. 2 is an enlarged plan view showing an enlarged pixel area of an array substrate of the liquid crystal display panel of FIG. 1. It is sectional drawing cut | disconnected by the III-III line of FIG. 4A is an enlarged view through the color filter substrate of the IVA portion of the liquid crystal display panel shown in FIG. 1, FIG. 4B is a sectional view taken along line IVB-IVB of FIG. 4A, and FIG. It is an enlarged view. 5A is an enlarged view of a portion corresponding to FIG. 4A of the liquid crystal display panel according to Embodiment 2 of the present invention, FIG. 5B is a cross-sectional view corresponding to FIG. 4B, and FIG. 5C is a portion corresponding to FIG. It is an enlarged view. 6A is an enlarged view of a portion corresponding to FIG. 4A of the liquid crystal display panel according to Embodiment 3 of the present invention, FIG. 6B is a cross-sectional view corresponding to FIG. 4B, and FIG. 6C is a portion corresponding to FIG. It is an enlarged view. 7A is an enlarged view of a portion corresponding to FIG. 4A of a liquid crystal display panel according to Embodiment 4 of the present invention, FIG. 7B is a cross-sectional view corresponding to FIG. 4B, and FIG. 7C is a portion corresponding to FIG. It is an enlarged view. 8A is an enlarged view of a portion corresponding to FIG. 4A of a liquid crystal display panel according to Embodiment 5 of the present invention, FIG. 8B is a cross-sectional view corresponding to FIG. 4B, and FIG. 8C is a portion corresponding to FIG. It is an enlarged view. 9A is a plan view of a main part of a conventional liquid crystal display device, and FIG. 9B is a cross-sectional view taken along the line IXB-IXB of the liquid crystal display device of FIG. 9A.

Explanation of symbols

10A to 10E: Liquid crystal display panel 11: Glass substrate 11a: Extension part 12: Scanning line
13: signal line 14: auxiliary capacitance line 14a: auxiliary capacitance electrode 15: semiconductor layer 17: gate insulating film 18: protective insulating film 19: pixel electrode 21: glass substrate 22: light shielding member 2
3: Color filter layer 24: Common electrode 30: Sealing material 30a: Bending part 31: Liquid crystal injection port 32: Sealing material storage part 33: Sealing material 40B ′, 40C ′, 40D ′, 40E ′: Space 40A, 40B 40C, 40D, 40E: Barrier 41: Columnar spacer 50: Planarized film AR: Array substrate CF: Color filter substrate CH: Contact hole G: Gate electrode S: Source electrode D: Drain electrode DA: Display region Dr: Driver GP
: Gap LC: Liquid crystal PA: Sub-pixel area SP: Gap

Claims (5)

A pair of substrates for a liquid crystal display panel is provided, and a peripheral portion of the pair of substrates is surrounded by a sealing material except for a liquid crystal inlet portion, and a columnar spacer is disposed on one of the pair of substrates. A liquid crystal display panel in which liquid crystal is sealed in an enclosed region, and the liquid crystal inlet is sealed with a sealing material,
The liquid crystal inlet portion of the seal material is provided with a bent portion,
In the width direction of the liquid crystal inlet, the length is the same as or shorter than the width of the liquid crystal inlet,
One or more barriers are formed along the shape of the bent portion of the sealing material that is lower than the gap between the pair of substrates,
The liquid crystal display panel, wherein the barrier is formed on an inner side than an end of the substrate. The liquid crystal display panel according to claim 1, wherein the barrier is formed with a certain gap from the bent portion of the sealing material. The liquid crystal display panel according to claim 1, wherein the barrier has a stepped shape that becomes higher from the end of the substrate toward the inner side. 4. The liquid crystal display panel according to claim 1, wherein the barrier is made of the same material as that for forming the columnar spacer. The barriers are formed alternately so as not to overlap each of the pair of substrates in plan view, with a gap between the barriers, and the barrier formed on one side of the pair of substrates is the columnar shape. The barrier formed on the other side of the pair of substrates is formed of the same material as that of the planarization film formed on the pair of substrates, and is formed on each of the pair of substrates. 2. The liquid crystal display panel according to claim 1, wherein the height of the barrier is not higher than half of the gap between the pair of substrates.

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