JP2006098609A - Liquid crystal display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display device of which a picture frame can be narrowed at a low manufacturing cost and with an easy manufacturing process, in relation to the liquid crystal display device. <P>SOLUTION: The liquid crystal display device includes: a pair of substrates 2, 4 placed opposite to each other; a sealing material 56 formed on an outer peripheral section of the substrates 2, 4 for the purpose of bonding the substrates 2, 4 to each other; a liquid crystal injection port 57 formed by partially opening the sealing material 56 on the side of edges 2a, 4a of the substrates 2, 4; a liquid crystal filled between the substrates 2, 4; a protruding structure 60 formed on the substrate 4 and preventing the sealing material 56 from extending to the side of the edges 2a, 4a in the case the substrates 2, 4 are bonded to each other; and an end-sealing material 58 to end-seal the liquid crystal injection port 57. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a liquid crystal display device used for a display unit of an electronic device.

  FIG. 15 shows a configuration of a conventional general liquid crystal display panel manufactured by using a dip type vacuum injection method. As shown in FIG. 15, the liquid crystal display panel 101 includes a pair of transparent substrates 102 and 104 arranged opposite to each other, a liquid crystal sandwiched between the substrates 102 and 104, and both substrates for isolating the liquid crystal from the outside. And a sealing material 156 applied and formed on the outer peripheral portions of 102 and 104. On one end side of the liquid crystal display panel 101, a liquid crystal injection port 157 that is a break of the sealing material 156 is formed. The liquid crystal injection port 157 is sealed with a sealing material 158. One of the substrates 102 and 104 is formed with a light shielding film (BM) 148 that defines a display area and shields a frame area outside the display area.

  The sealing material 156 includes a frame-shaped portion 156 a formed in a frame shape along the outer peripheral portion of the liquid crystal display panel 101 and a neck shape extending toward one end side of the liquid crystal display panel 101 on both sides of the liquid crystal injection port 157. Part 156b. In general, an ultraviolet curable resin is used instead of a thermosetting resin for the sealing material 158 that contacts the liquid crystal in an uncured state. For this reason, the sealing material 156 is provided with a neck-shaped portion 156b so that the sealing material 158 applied to the liquid crystal injection port 157 does not penetrate into the formation region of the BM 148 that blocks ultraviolet rays.

  In the panel process among the manufacturing processes of a general liquid crystal display panel, a thermosetting sealing material 156 is partially provided on the outer periphery of each of the panels 102 and 104 of the pair of substrates 102 and 104 manufactured through a predetermined process. Is drawn as a liquid crystal injection port 157. Next, a hot press process is performed in which the substrates 102 and 104 are superposed and heated while being pressed to bond the substrates 102 and 104 together to form a predetermined cell gap. Next, the bonded substrates 102 and 104 are divided into panels by a scribe process and a break process, and a plurality of empty cells are manufactured. Next, liquid crystal is injected into the empty cell from the liquid crystal injection port 157 by using a dip vacuum injection method. Next, an ultraviolet curable sealing material 158 is applied to the liquid crystal injection port 157, and the sealing material 158 is cured by irradiating ultraviolet rays. The liquid crystal display panel 101 is manufactured through the above steps.

  By the way, when the sealing material 156 is formed in the shape as shown in FIG. 15, the end portion 156c which is the tip of the neck-shaped portion 156b is one end side of the liquid crystal display panel 101, that is, the divided section 102a of the substrates 102 and 104. , 104a. The distance d between the end 156c and the divided sections 102a and 104a affects the panel cutting process, the liquid crystal sealing process, and the like. If the distance d is long, it becomes difficult to seal the liquid crystal injection port 157 with the sealing material 158, and liquid crystal leakage is likely to occur. At the same time, the frame area of the liquid crystal display device becomes wide. Therefore, it is better to shorten the distance d for high yield and narrow frame of the liquid crystal display device. On the other hand, however, if the end portion 156c is positioned outside the dividing planes 102a and 104a, it becomes difficult to divide the panel in the break process, so the distance d needs to be increased to some extent.

  As described above, the position of the end portion 156c of the sealing material 156 with respect to the divided surfaces 102a and 104a needs to be accurately controlled. However, an error occurs in the application position of the sealing material 156 and the dividing position for each panel. In the hot press process, both substrates 102 and 104 are pressurized from the outside, so that the width of the sealing material 156 is increased and the length is also increased. For this reason, the position of the edge part 156c after board | substrate bonding moves to the dividing surfaces 102a and 104a side rather than the position before board | substrate bonding. Accordingly, it is difficult to accurately control the distance d between the end portion 156c of the sealing material 156 and the dividing surfaces 102a and 104a.

  In the case of the multi-chamfer method, a plurality of panels are laid out on the mother glass. Considering that the end portion 156c of the sealing material 156 may be located outside the dividing surfaces 102a and 104a, it is necessary to provide a space between adjacent panels on the mother glass. For this reason, the trouble that the number of chamfers decreases arises and the problem that the manufacturing cost per liquid crystal display panel will increase arises.

  FIG. 16 shows another configuration of a conventional liquid crystal display panel. In the configuration shown in FIG. 15, the frame-shaped portion and the neck-shaped portion of the sealing material 156 are drawn continuously, but in the configuration shown in FIG. 16, the step of drawing the frame-shaped sealing material 160, The sealing materials 159 and 160 are applied in two processes, a process called a banking process for drawing the sealing material 159 of the part. By drawing the sealing materials 159 and 160 in two independent steps, the sealing material is not drawn in an arc shape near the boundary between the frame-like portion and the neck-like portion. However, in this configuration, in addition to the same problem as described above, there is also a problem that the sealing material application process becomes complicated.

JP-A-7-159795

  An object of the present invention is to provide a liquid crystal display device capable of narrowing the frame with a low manufacturing cost and an easy manufacturing process.

  The object is to form a pair of substrates arranged opposite to each other, a sealing material that is formed on an outer peripheral portion between the pair of substrates, and bonds the pair of substrates, and the sealing material is partially formed on one end side of the pair of substrates. A liquid crystal injection opening that is opened in a general manner, a liquid crystal filled between the pair of substrates, and a seal member that is formed on at least one of the pair of substrates, and that seals when the pair of substrates are bonded together This is achieved by a liquid crystal display device having a structure that suppresses stretching to the side and a sealing material that seals the liquid crystal injection port.

  According to the present invention, it is possible to realize a liquid crystal display device capable of narrowing the frame with a low manufacturing cost and an easy manufacturing process.

[First Embodiment]
A liquid crystal display device according to a first embodiment of the present invention will be described with reference to FIGS. First, a schematic configuration of the liquid crystal display device according to the present embodiment will be described. FIG. 1 shows a schematic configuration of a liquid crystal display device according to the present embodiment. As shown in FIG. 1, the liquid crystal display device includes a thin film transistor (TFT) substrate 2, a counter substrate 4, and a liquid crystal 6 (not shown) sealed between the substrates 2 and 4. 1 The TFT substrate 2 is formed with gate bus lines and drain bus lines that intersect with each other via an insulating film, and TFTs and pixel electrodes arranged for each pixel. On the counter substrate 4, a color filter (CF) and a common electrode are formed.

  The TFT substrate 2 includes a gate bus line driving circuit 80 on which driver ICs for driving a plurality of gate bus lines are mounted, and a drain bus line driving circuit 82 on which driver ICs for driving a plurality of drain bus lines are mounted. It is connected. These drive circuits 80 and 82 are configured to output scanning signals and data signals to predetermined gate bus lines or drain bus lines based on predetermined signals output from the control circuit 84. A polarizing plate 87 is disposed on the surface of the TFT substrate 2 opposite to the TFT element forming surface, and a polarizing plate disposed in crossed Nicols with the polarizing plate 87 on the surface opposite to the common electrode forming surface of the counter substrate 4. 86 is arranged. A backlight unit 88 is disposed on the surface of the polarizing plate 87 opposite to the TFT substrate 2.

  FIG. 2 shows the configuration of the liquid crystal display panel 1 of the liquid crystal display device according to the present embodiment, and FIG. 3 shows the cross-sectional configuration of the liquid crystal display panel 1 cut along the line AA in FIG. As shown in FIGS. 2 and 3, a thermosetting sealing material 56 for bonding the substrates 2 and 4 and a part of the sealing material 56 are opened in the outer peripheral portion between the TFT substrate 2 and the counter substrate 4. A liquid crystal injection port 57 is formed. The sealing material 56 includes a frame-shaped portion 56a formed in a frame shape along each edge of the outer peripheral portion of the liquid crystal display panel 1, and the frame-shaped portion 56a on both sides of the liquid crystal injection port 57 from the frame-shaped portion 56a. And a neck portion 56b extending toward the end side 1a. Between the end portion of the neck portion 56b and the end side 1a of the liquid crystal display panel 1, a convex structure 60 having a convex cross section extending substantially parallel to the end side 1a is formed on the counter substrate 4 side. The convex structure 60 is provided to prevent the sealing material 56 from extending toward the end side 1a when the substrates 2 and 4 are bonded together. Thereby, the front-end | tip part 56d of the neck-shaped part 56b is extended in two directions on the right and left in the figure along the convex structure 60. FIG. The convex structure 60 is simultaneously formed of the same forming material as any one of the red (R), green (G), and blue (B) color CF resin layers 40 formed in the display region α. With reference to the surface on which the sealing material 56 is formed, the height of the convex structure 60 is, for example, about 1 to 2 μm. Moreover, the height of the convex structure 60 can be further increased by stacking a plurality of layers made of the same material as the R, G, and B CF resin layers 40 and simultaneously formed. The liquid crystal injection port 57 is sealed with an ultraviolet curable sealing material 58 (not shown in FIG. 3). On the counter substrate 4, a BM 48 (not shown in FIG. 3) that defines the display area α and shields the frame area outside the display area α is formed.

  Here, a manufacturing method of the liquid crystal display device according to the present embodiment will be described. First, the TFT substrate 2 and the counter substrate 4 are manufactured by a predetermined process. When the counter substrate 4 is manufactured, a convexity as shown in FIG. 2 is formed between the region that becomes the liquid crystal injection port 57 after the substrates are bonded and the region that becomes the dividing surface 4a when being divided for each panel. A shaped structure 60 is formed. The convex structure 60 is formed, for example, by laminating three layers made of the same forming material as the CF resin layers 40 of R, G, and B colors and formed simultaneously.

  Next, a thermosetting sealing material 56 is drawn on the outer peripheral portion of each panel of the TFT substrate 2 and the counter substrate 4 so that a part thereof is opened as the liquid crystal injection port 57. Drawing of the sealing material 56 is performed using a dispenser method or a screen printing method. Next, a hot press process is performed in which the substrates 2 and 4 are overlapped and heated while being pressed to bond the substrates 2 and 4 together to cure the sealing material 56. Next, the bonded substrates 2 and 4 are divided for each panel by a scribing process and a break process to produce a plurality of empty cells.

  FIG. 4 shows the structure of the produced empty cell, and FIG. 5 shows the cross-sectional structure of the empty cell cut along the line BB in FIG. FIG. 4 also shows the sealing material 54 before the substrates are bonded together. As shown in FIGS. 4 and 5, the convex structure 60 is formed by laminating three layers made of the same forming material as the CF resin layers 40 of R, G, and B, respectively. Extend substantially parallel to the cross sections 2a and 4a. The width of the convex structure 60 is about 150 to 200 μm, and the height is about 3.1 to 3.5 μm. Moreover, the width | variety of the sealing material 54 before board | substrate bonding is about 200-300 micrometers. The width | variety of the sealing material 56 after board | substrate bonding is about 1100-1300 micrometers, and height (seal gap) is about 6.2 micrometers.

  In the conventional configuration that does not have the convex structure 60, from the front end 54a of the sealing material 54 before substrate bonding to the front end 56c of the sealing material 56 ′ extended to the dividing planes 2a ′ and 4a ′ by the substrate bonding. The distance was about 600 to 800 μm. For this reason, it is necessary to leave an interval of about 850 μm (750 to 950 μm) between the tip 54 a of the sealing material 54 and the divided sections 2 a ′ and 4 a ′, including a scribe margin of about 150 μm.

  On the other hand, in the present embodiment, the convex structure 60 suppresses the extension of the sealing material 56 toward the dividing surfaces 2a and 4a, and the tip 56d of the sealing material 56 at the time of bonding the substrates is a convex structure. It extends in two directions (or one direction) along the object 60. For this reason, the necessary space between the tip 54a of the sealing material 54 before bonding the substrates and the divided sections 2a and 4a is about 450 μm, which is 400 μm narrower than the conventional 850 μm. Therefore, according to the present embodiment, the frame region on the liquid crystal injection port 57 side of the liquid crystal display panel 1 can be narrowed.

  Next, the liquid crystal 6 is injected into the empty cell from the liquid crystal injection port 57 using a dip-type vacuum injection method. In the dip type vacuum injection method, the liquid crystal injection port 57 is brought into contact with the liquid crystal filled in the liquid crystal dish in a vacuum, and the liquid crystal 6 is filled in the empty cell by capillary action by returning to atmospheric pressure. Next, an ultraviolet curable sealing material 58 is applied to the liquid crystal injection port 57, and the sealing material 58 is cured by irradiating ultraviolet rays. The liquid crystal display panel 1 is manufactured through the above steps. Then, a liquid crystal display device is completed through a predetermined module process.

  In the present embodiment, since the extension of the sealing material 56 toward the dividing surfaces 2a and 4a is suppressed by the convex structure 60, the distance d between the end portion of the sealing material 56 and the dividing surfaces 2a and 4a is almost equal. It can be controlled constantly. For this reason, the frame area of the liquid crystal display panel 1 can be narrowed, and the number of chamfers does not decrease even in the case of the multi-chamfering method. Moreover, since the convex structure 60 is simultaneously formed with the same forming material as the CF resin layer 40, the manufacturing process and the manufacturing cost do not increase. Therefore, according to this embodiment, it is possible to realize a liquid crystal display device capable of narrowing the frame with a low manufacturing cost and an easy manufacturing process.

  FIG. 6 shows a modification of the configuration of the liquid crystal display panel 1 according to the present embodiment, and FIG. 7 shows a cross-sectional configuration of the liquid crystal display panel 1 cut along the line CC in FIG. As shown in FIGS. 6 and 7, the liquid crystal display panel 1 of this modification has, for example, an alignment regulating protrusion 42 for regulating the alignment of the liquid crystal 6 having a negative dielectric anisotropy in the display region α. Yes. In a vertical alignment (VA) mode liquid crystal display device having a wide viewing angle, the alignment regulating protrusion 42 is generally formed. The alignment regulating protrusions 42 are made of, for example, a non-conductive material such as a resist material used as a material for forming an etching mask in a photolithography process. In the present modification, the convex structure 61 that suppresses the extension of the sealing material 56 toward the end side 1 a is simultaneously formed of the same material as that of the alignment regulating protrusion 42. The height of the convex structure 61 is, for example, about 1.5 to 2.5 μm. In this example, the convex structure 61 is formed on the counter substrate 4 side, but may be formed on the TFT substrate 2 side. Also according to this modification, the same effect as the configuration shown in FIGS. 2 to 5 can be obtained.

  FIG. 8 shows another modification of the configuration of the liquid crystal display panel 1 according to the present embodiment. As shown in FIG. 8, in this modification, the first layer 41 formed simultaneously with the same forming material as the CF resin layer 40 and the second layer formed simultaneously with the same forming material as the alignment regulating protrusions 42 are formed. The convex structure 62 is formed by laminating 43. By stacking the first layer 41 and the second layer 43, the height of the convex structure 62 becomes 4.6 to 5.0 μm, and the convex structure 60 shown in FIG. 5 and the height shown in FIG. It becomes higher than the height of the convex structure 61. By increasing the height of the convex structure 62, the effect of suppressing the extension of the sealing material 56 toward the end side 1a is further enhanced. In general, since the viscosity of the liquid crystal and the sealing material is lower than that of the sealing material, if the difference between the sealing gap (6.2 μm) and the height of the convex structure 62 is about 1 μm, the liquid crystal 6 is injected and There is no problem in sealing the liquid crystal injection port 57.

[Second Embodiment]
Next, a liquid crystal display device according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 9 shows the configuration of the liquid crystal display panel 1 of the liquid crystal display device according to the present embodiment, and FIG. 10 shows the cross-sectional configuration of the liquid crystal display panel 1 cut along the line DD in FIG. As shown in FIGS. 9 and 10, in this embodiment, in order to suppress the extension of the sealing material 56 toward the end side 1a, the concave structure 63 having a concave cross section extending substantially parallel to the end side 1a is provided. It is formed on the TFT substrate 2 side. The concave structure 63 is formed by partially removing the insulating film 30 such as a silicon nitride film (SiN film) formed on the gate bus line of the TFT substrate 2 and an SiN film formed on the drain bus line. ing. For example, the concave structure 63 is formed by removing the insulating film 30 on the source electrode of the TFT, on the gate bus line terminal connected to the gate bus line, and on the drain bus line terminal connected to the drain bus line. It is performed simultaneously with the process of forming the hole. The depth of the concave structure 63 is, for example, 0.7 to 0.9 μm. A part of the neck portion 56b of the sealing material 56 is disposed so as to overlap the concave structure 63, and a tip portion 56d of the neck portion 56b extends in two directions on the left and right in the drawing along the side wall of the concave structure 63, for example. ing.

  In the hot pressing step of the manufacturing process of the liquid crystal display device according to the present embodiment, the neck portion 56b of the sealing material 56 applied to the inner side of the concave structure 63 extends toward the divided sections 2a and 4a. After flowing in, it extends in two directions (or one direction) along the concave structure 63. Therefore, according to the present embodiment, the distance d between the end portion of the sealing material 56 and the divided sections 2a and 4a can be controlled to be substantially constant. For this reason, the frame area of the liquid crystal display panel 1 can be narrowed, and the number of chamfers does not decrease even in the case of the multi-chamfering method. Further, since the concave structure 63 is formed at the same time as the contact hole is formed by removing the insulating film 30 such as on the source electrode of the TFT, the manufacturing process does not increase. Therefore, according to this embodiment, it is possible to realize a liquid crystal display device capable of narrowing the frame with a low manufacturing cost and an easy manufacturing process.

[Third Embodiment]
Next, a liquid crystal display device according to a third embodiment of the present invention will be described with reference to FIGS. FIG. 11 shows a configuration of the liquid crystal display panel 1 of the liquid crystal display device according to the present embodiment, and FIG. 12 shows a cross-sectional configuration of the liquid crystal display panel 1 cut along line EE in FIG. The liquid crystal display device according to the present embodiment has a BM-on-Array structure. The BM-on-Array structure is a technique for improving the aperture ratio of a pixel, and a gate bus line and a drain bus line formed on the TFT substrate 2 are used as a BM that shields light between pixel regions. Since the BM that shields light between the pixel regions is not formed on the counter substrate 4 side, it is not necessary to consider the bonding accuracy of the substrates 2 and 4 and a high aperture ratio can be obtained. In the BM-on-Array structure, when viewed perpendicularly to the substrate surface, the pixel electrode end portion is disposed so as to overlap the bus line. Therefore, in order to reduce the capacitance formed between the pixel electrode and the bus line, as shown in FIGS. 11 and 12, the film is made of a photosensitive resin or the like and is relatively thick (about 2 to 3 μm). An overcoat (OC) layer 32 is formed on the drain bus line. In general, the OC layer 32 is formed only in the display area α, but in the present embodiment, the OC layer 32 is also formed outside the display area α. In this example, the BM 48 that shields the frame area around the display area α is provided on the counter substrate 4.

  In the vicinity of the end portion of the neck portion 56b of the seal material 56, a concave structure 64 having a concave cross section extending substantially parallel to the end side 1a is provided in order to suppress the extension of the seal material 56 toward the end side 1a. It is formed on the substrate 2 side. The concave structure 64 of the present embodiment extends only in the direction toward the outside of the liquid crystal injection port 57. In addition, since the substrate surface in the region where the sealing material 56 is formed is desirably flat, in this embodiment, the concave structure 65 is also formed in the region where the sealing material 56 is drawn on the outer periphery of the TFT substrate 2. ing. The concave structures 64 and 65 are formed by partially removing the OC layer 32. The seal material 56 is disposed so as to overlap the concave structure 65, and a part of the neck-shaped portion 56 b is disposed so as to overlap the concave structure 64. The tip 56d of the neck 56b extends in the direction toward the outside of the liquid crystal injection port 57 along the side wall of the concave structure 64 on the side of the end 1a, for example.

  Here, a manufacturing method of the liquid crystal display device according to the present embodiment will be described. First, the TFT substrate 2 provided with the OC layer 32 and the counter substrate 4 are manufactured by a predetermined process. When the TFT substrate 2 is manufactured, as shown in FIG. 11, the OC layer 32 in the region where the sealing material 56 is applied is removed to form the concave structure 65, and the neck portion 56b of the sealing material 56 is formed. The concave structure 64 is formed by removing the OC layer 32 in the vicinity of the region where the end of the structure is disposed.

  Next, a thermosetting sealing material 56 is drawn on the outer peripheral portion of each panel of the TFT substrate 2 and the counter substrate 4 so that a part thereof is opened as the liquid crystal injection port 57. Drawing of the sealing material 56 is performed using a dispenser method or a screen printing method. Next, a hot press process is performed in which the substrates 2 and 4 are overlapped and heated while being pressed to bond the substrates 2 and 4 together to cure the sealing material 56. Next, the bonded substrates 2 and 4 are divided for each panel by a scribing process and a break process to produce a plurality of empty cells.

  FIG. 13 shows the configuration of the manufactured empty cell, and FIG. 14 shows the cross-sectional configuration of the empty cell cut along the line FF in FIG. FIG. 13 also shows the sealing material 54 before the substrates are bonded together. As shown in FIG.13 and FIG.14, the width | variety of the sealing material 54 before board | substrate bonding is about 200-300 micrometers. The width | variety of the sealing material 56 after board | substrate bonding is about 1100-1300 micrometers, and height (seal gap) is about 8.2 micrometers.

  In the conventional configuration that does not have the concave structure 64, from the tip 54 a of the sealing material 54 before substrate bonding to the tip 56 c of the sealing material 56 ′ extended to the dividing planes 2 a ′ and 4 a ′ by substrate bonding. The distance was about 600 to 800 μm. For this reason, it is necessary to leave an interval of about 850 μm (750 to 950 μm) between the tip 54 a of the sealing material 54 and the divided sections 2 a ′ and 4 a ′, including a scribe margin of about 150 μm.

  On the other hand, in the present embodiment, the concave structure 64 suppresses the extension of the sealing material 56 toward the dividing planes 2a and 4a, and the tip 56d of the sealing material 56 at the time of bonding the substrates is a concave structure. It extends along the direction 64 toward the outside of the liquid crystal injection port 57. For this reason, the necessary space between the tip 54a of the sealing material 54 before bonding the substrates and the divided sections 2a and 4a is about 450 μm, which is 400 μm narrower than the conventional 850 μm. Further, the necessary space between the side wall of the concave structure 64 on the side of the divided sections 2a and 4a and the divided sections 2a and 4a is about 150 μm corresponding to the scribe margin. Therefore, according to the present embodiment, the frame region on the liquid crystal injection port 57 side of the liquid crystal display panel 1 can be narrowed.

  Next, the liquid crystal 6 is injected into the empty cell from the liquid crystal injection port 57 using a dip-type vacuum injection method. In the dip type vacuum injection method, the liquid crystal injection port 57 is brought into contact with the liquid crystal filled in the liquid crystal dish in a vacuum, and the liquid crystal 6 is filled in the empty cell by capillary action by returning to atmospheric pressure. Next, an ultraviolet curable sealing material 58 is applied to the liquid crystal injection port 57, and the sealing material 58 is cured by irradiating ultraviolet rays. The liquid crystal display panel 1 is manufactured through the above steps. Then, a liquid crystal display device is completed through a predetermined module process.

  In this embodiment, since the extension of the sealing material 56 toward the dividing surfaces 2a and 4a is suppressed by the concave structure 64, the distance d between the end of the sealing material 56 and the dividing surfaces 2a and 4a is substantially constant. Can be controlled. For this reason, the frame area of the liquid crystal display panel 1 can be narrowed, and the number of chamfers does not decrease even in the case of the multi-chamfering method. Moreover, since the concave structure 64 (and 65) can be formed only by changing the patterning shape of the OC layer 32, the manufacturing process and the manufacturing cost do not increase. Therefore, according to this embodiment, it is possible to realize a liquid crystal display device capable of narrowing the frame with a low manufacturing cost and an easy manufacturing process.

  In this example, the OC layer 32 on the TFT substrate 2 is removed to form the concave structures 64 and 65. However, when the OC layer 32 is formed on the counter substrate 4, the concave structure 64, 65 can be formed on the counter substrate 4 side, and of course, the concave structures 64 and 65 can be formed on both the TFT substrate 2 and the counter substrate 4. If the concave structures 64 and 65 are formed on both the substrates 2 and 4, the extension of the sealing material 56 toward the dividing surfaces 2 a and 4 a can be more reliably suppressed.

The present invention is not limited to the above embodiment, and various modifications can be made.
For example, in the above embodiment, an active matrix liquid crystal display device has been described as an example. However, the present invention is not limited to this and can be applied to a simple matrix liquid crystal display device.

The liquid crystal display device according to the embodiment described above can be summarized as follows.
(Appendix 1)
A pair of opposed substrates;
A sealant formed on an outer peripheral portion between the pair of substrates and bonding the pair of substrates;
A liquid crystal injection port in which the sealing material is partially opened on one end side of the pair of substrates;
A liquid crystal filled between the pair of substrates;
A structure that is formed on at least one of the pair of substrates and prevents the sealing material from extending toward the one end side when the pair of substrates are bonded together;
A liquid crystal display device comprising: a sealing material for sealing the liquid crystal injection port.
(Appendix 2)
In the liquid crystal display device according to appendix 1,
The liquid crystal display device, wherein the structure extends substantially parallel to the one end side.
(Appendix 3)
In the liquid crystal display device according to appendix 1 or 2,
The structure has a convex shape and is disposed between the sealing material and the one end side.
(Appendix 4)
In the liquid crystal display device according to attachment 3,
The sealing material has a frame-shaped portion along the outer peripheral portion of the pair of substrates, and a neck-shaped portion extending from the frame-shaped portion toward the one end side on both sides of the liquid crystal injection port,
The said structure is arrange | positioned between the both ends of the said sealing material, and the said one end side. The liquid crystal display device characterized by the above-mentioned.
(Appendix 5)
In the liquid crystal display device according to appendix 3 or 4,
A color filter resin layer formed on one of the pair of substrates;
The liquid crystal display device, wherein the structure is formed of the same forming material as the color filter resin layer.
(Appendix 6)
In the liquid crystal display device according to appendix 3 or 4,
An alignment regulating protrusion formed on one of the pair of substrates to regulate the alignment of the liquid crystal;
The liquid crystal display device, wherein the structure is made of the same material as that of the alignment regulating protrusion.
(Appendix 7)
In the liquid crystal display device according to appendix 1 or 2,
The liquid crystal display device, wherein the structure has a concave shape.
(Appendix 8)
In the liquid crystal display device according to appendix 7,
The sealing material has a frame-shaped portion along the outer peripheral portion of the pair of substrates, and a neck-shaped portion extending from the frame-shaped portion toward the one end side on both sides of the liquid crystal injection port,
A liquid crystal display device, wherein at least a part of the neck portion is disposed so as to overlap the structure.
(Appendix 9)
In the liquid crystal display device according to appendix 7 or 8,
The liquid crystal display device, wherein the structure is formed by partially removing an insulating film formed on one of the pair of substrates.
(Appendix 10)
In the liquid crystal display device according to appendix 7 or 8,
An overcoat layer formed on one of the pair of substrates;
The liquid crystal display device, wherein the structure is formed by partially removing the overcoat layer.

It is a figure which shows schematic structure of the liquid crystal display device by the 1st Embodiment of this invention. It is a figure which shows the structure of the liquid crystal display panel 1 of the liquid crystal display device by the 1st Embodiment of this invention. It is sectional drawing which shows the structure of the liquid crystal display panel 1 of the liquid crystal display device by the 1st Embodiment of this invention. It is a figure which shows the structure of the empty cell in the manufacturing process of the liquid crystal display device by the 1st Embodiment of this invention. It is sectional drawing which shows the structure of the empty cell in the manufacturing process of the liquid crystal display device by the 1st Embodiment of this invention. It is a figure which shows the modification of a structure of the liquid crystal display device by the 1st Embodiment of this invention. It is sectional drawing which shows the modification of the structure of the liquid crystal display device by the 1st Embodiment of this invention. It is sectional drawing which shows the other modification of the structure of the liquid crystal display device by the 1st Embodiment of this invention. It is a figure which shows the structure of the liquid crystal display panel 1 of the liquid crystal display device by the 2nd Embodiment of this invention. It is sectional drawing which shows the structure of the liquid crystal display panel 1 of the liquid crystal display device by the 2nd Embodiment of this invention. It is a figure which shows the structure of the liquid crystal display panel 1 of the liquid crystal display device by the 3rd Embodiment of this invention. It is sectional drawing which shows the structure of the liquid crystal display panel 1 of the liquid crystal display device by the 3rd Embodiment of this invention. It is a figure which shows the structure of the empty cell in the manufacturing process of the liquid crystal display device by the 3rd Embodiment of this invention. It is sectional drawing which shows the structure of the empty cell in the manufacturing process of the liquid crystal display device by the 3rd Embodiment of this invention. It is a figure which shows the structure of the conventional liquid crystal display panel. It is a figure which shows the structure of the other conventional liquid crystal display panel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid crystal display panel 1a Edge 2 TFT substrate 2a, 4a Divided cross section 4 Opposite substrate 6 Liquid crystal 30 Insulating film 32 OC layer 40 CF resin layer 41 First layer 42 Orientation regulation protrusion 43 Second layer 48 BM
54, 56, 56 'Sealing material 54a Tip 56a Frame 56b Neck 56c Tip 56d Tip 57 Liquid crystal inlet 58 Sealant 60, 61, 62 Convex structure 63, 64, 65 Concave structure 80 Gate Bus line drive circuit 82 Drain bus line drive circuit 84 Control circuit 86, 87 Polarizing plate 88 Backlight unit

Claims (6)

A pair of opposed substrates;
A sealant formed on an outer peripheral portion between the pair of substrates and bonding the pair of substrates;
A liquid crystal injection port in which the sealing material is partially opened on one end side of the pair of substrates;
A liquid crystal filled between the pair of substrates;
A structure that is formed on at least one of the pair of substrates and prevents the sealing material from extending toward the one end side when the pair of substrates are bonded together;
A liquid crystal display device comprising: a sealing material for sealing the liquid crystal injection port. The liquid crystal display device according to claim 1.
The liquid crystal display device, wherein the structure extends substantially parallel to the one end side. The liquid crystal display device according to claim 1 or 2,
The structure has a convex shape and is disposed between the sealing material and the one end side. The liquid crystal display device according to claim 3.
The sealing material has a frame-shaped portion along the outer peripheral portion of the pair of substrates, and a neck-shaped portion extending from the frame-shaped portion toward the one end side on both sides of the liquid crystal injection port,
The said structure is arrange | positioned between the both ends of the said sealing material, and the said one end side. The liquid crystal display device characterized by the above-mentioned. The liquid crystal display device according to claim 1 or 2,
The liquid crystal display device, wherein the structure has a concave shape. The liquid crystal display device according to claim 5.
The sealing material has a frame-shaped portion along the outer peripheral portion of the pair of substrates, and a neck-shaped portion extending from the frame-shaped portion toward the one end side on both sides of the liquid crystal injection port,
A liquid crystal display device, wherein at least a part of the neck portion is disposed so as to overlap the structure.