JP5317445B2 - Liquid crystal display device and manufacturing method thereof - Google Patents

Description

  The present invention relates to a liquid crystal display device and a manufacturing method thereof.

    There is a panel of a liquid crystal display device including a TFT substrate on which a thin film transistor (TFT) element is formed, a CF substrate on which a color filter (CF) is formed, and a liquid crystal sandwiched between these two substrates. . In addition, as a liquid crystal filling method for such a panel, a pattern having a sealing opening for sealing liquid crystal with a sealing material such as a thermosetting resin is formed around the display region in order to sandwich the liquid crystal between two substrates, After curing the sealing material, a method of filling and sealing the liquid crystal from the sealing port is taken. However, a liquid crystal dropping method (ODF: One Drop Filling) is known as a method for solving this because of the time taken to enclose the liquid crystal (see Patent Document 1).

  In the liquid crystal dropping method, a seal pattern is formed on one substrate by dispenser or screen printing. Then, a predetermined amount of liquid crystal is dropped onto the substrate on which the seal pattern has been formed, and the other substrate is aligned and superposed in a vacuum, followed by pressure bonding.

  By the way, in the method of enclosing the liquid crystal, since the liquid crystal is encapsulated after the sealing material is cured, the liquid crystal does not enter the sealing material or cause a defect that exceeds the sealing material. On the other hand, in the liquid crystal dropping method, the liquid crystal is dropped in a soft state in which the sealing material is uncured, and the substrates are bonded and pressure-bonded at atmospheric pressure until the sealing material is cured. Accordingly, since the liquid crystal in the panel is pushed by the two substrates, if the amount of dripping is excessive, a phenomenon that the liquid crystal enters the sealing material or a phenomenon that leaks beyond the sealing material occurs. In this regard, Patent Document 1 describes that the liquid crystal dropping amount is controlled inline and the excess amount is recovered to prevent excessive liquid crystal leakage.

JP 2002-107740 A

  However, controlling the amount of dropped liquid crystal in-line and recovering excess dropped liquid crystal is disadvantageous because it increases the capital investment required and the number of processes.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to suppress excessive entry of liquid crystal into the seal portion and leakage without limiting the display area.

  In order to solve the above-mentioned problems, the present inventors have found that it is possible to suppress excessive entry of liquid crystal into the seal portion when the thickness of the sealing material layer is reduced. Therefore, in the present invention, the thickness of the sealing material layer when the two substrates are bonded to each other is set to be equal to or smaller than the thickness of the liquid crystal layer corresponding to the display region. For this purpose, for example, a pedestal layer for applying a sealing material is provided on at least one of the substrates.

For example, a first aspect of the present invention is a liquid crystal display device in which a liquid crystal is sandwiched between a first substrate and a second substrate, wherein the first substrate and the second substrate are the liquid crystal The first substrate is a color filter substrate having a color filter layer on the substrate, and the first substrate is formed on the first substrate. has a pedestal layer comprising the sealing material, the sealing material includes a gap material, the pedestal layer thereon, grooves and the inner bank provided in Table display region side of the groove And the sealing material is provided inside the groove and on the inner bank, the gap material is provided inside the groove, and the thickness of the pedestal layer is Thicker than the thickness of the color filter layer corresponding to the display area And wherein greater than the thickness of the liquid crystal layer, the thickness of the layer of the sealing material is less than the thickness of the liquid crystal layer of the portion corresponding to the display area, the said color filter layer is thicker than the base layer the liquid crystal A sealing material thinner than the layer is formed over the entire circumference of the display region.

According to a second aspect of the present invention, a first substrate and a second substrate are provided, and a liquid crystal is sandwiched between the first substrate and the second substrate, and the first substrate is A method of manufacturing a liquid crystal display device, which is a color filter substrate having a color filter layer on the substrate, on the pedestal layer formed on the first substrate and having a groove and an inner bank on the inner side thereof A step of applying a sealing material including a gap material so as to surround the liquid crystal filling region, a step of filling a liquid crystal inside the pedestal layer and the sealing material, and after the filling of the liquid crystal, Bonding the substrate and the second substrate, and the sealing material is provided in the groove and on the inner bank when the first substrate and the second substrate are bonded together. And the thickness of the layer is The thickness of the liquid crystal layer of the portion where filter layer corresponds to a display region provided is formed so as to be below the gap material is provided inside of the groove, the thickness of the pedestal layer, the display area A pedestal layer that is thicker than the color filter layer and thicker than the color filter layer, and thinner than the liquid crystal layer, and a sealing material thinner than the liquid crystal layer. It is formed over the circumference.

  FIG. 1 is a cross-sectional view of a liquid crystal display device to which an embodiment of the present invention is applied. As shown in the figure, the liquid crystal display device includes a first substrate 10, a second substrate 20, a liquid crystal layer 30, and a seal portion 60.

  The first substrate 10 is a so-called color filter substrate. The first substrate 10 has a black matrix layer 11, a colored resist layer 12 of R (red), G (green), and B (blue), and a colored resist layer 12 on the surface facing the second substrate 20. An overcoat layer 13 for planarization and an alignment film 14 are provided.

  1 is an IPS (In-Plane-Switching) system, the transparent electrode layer does not exist on the first substrate 10. However, the present invention can also be applied to liquid crystal display devices other than the IPS mode, and in that case, a transparent electrode layer exists between the overcoat layer 13 of the first substrate 10 and the alignment film 14. It will be.

  The second substrate 20 is a so-called TFT substrate, and has an alignment film 21 on the surface facing the first substrate.

  The liquid crystal layer 30 is sandwiched between the first substrate 10 and the second substrate 20 and is aligned by the alignment film 14 and the alignment film 21.

The seal portion 60 is provided to seal the liquid crystal 30 sandwiched between the first substrate 10 and the second substrate 20. The seal portion 60 is represented by a rectangular closed curve that surrounds the filling region of the liquid crystal 30 when the liquid crystal display device is viewed from above (see the perspective views of FIGS. 2C and 2D). The seal portion 60 includes a seal material pedestal layer 40 and a seal material 50.

The sealing material pedestal layer 40 is a pedestal for the sealing material 50 applied when the first substrate 10 and the second substrate 20 are bonded together. The sealing material pedestal layer 40 is provided to make the layer thickness (seal gap) n of the sealing material 50 equal to or smaller than the thickness (cell gap) m of the portion corresponding to the display region of the liquid crystal 30. It has been. The thickness L1 of the sealing material pedestal layer 40 is the same as or thicker than the thickness L2 of the portion corresponding to the display area of the color filter layer formed on the first substrate 10.

  The thickness L1 of the sealing material pedestal layer 40 is, for example, in the range of 1 to 4 μm, and is preferably about 0 to 3 μm thicker than the thickness L2 of the color filter layer.

  The material of the sealing material pedestal layer 40 is not particularly limited, but when formed simultaneously in the process of forming the color filter, the layer 41 made of the same material as the black matrix 11, the layer 42 made of the same material as the colored resist layer 12, and the overcoat A layer 43 made of the same material as the layer 13 is laminated.

The sealing material 50 bonds the seal pedestal layer 40 and the second substrate 20 together. Due to the presence of the sealing material pedestal layer 40, the thickness (seal gap) n of the sealing material 50 is equal to or smaller than the thickness (cell gap) m of the portion corresponding to the display region of the liquid crystal 30.

  Since the cell gap m is usually in the range of 3 to 5 μm, the seal gap n is preferably in the range of 1 to 5 μm. If the seal gap n is too large, the phenomenon of the liquid crystal 30 entering the sealing material 50 tends to occur, and if it is too small, the adhesion reliability is lowered.

  As the material of the sealing material 50, a material generally used for bonding substrates of liquid crystal display devices can be used. The seal material 50 includes a spacer member (gap material) 52 in order to secure a desired seal gap n. The spacer member 52 is preferably an insulating fine particle that does not deform. For example, a silica bead or silica fiber having a diameter of 1 μm.

  Next, the manufacturing method of the panel of the liquid crystal display device comprised as mentioned above is demonstrated. In addition, the manufacturing method of this embodiment has the characteristics in the bonding process of two board | substrates. Since the other panel manufacturing process can employ a known method, the description thereof is omitted.

  In this embodiment, a liquid crystal dropping method is used as a liquid crystal filling method. And it is devised in the application of the sealing material in that case.

  FIG. 2 is a diagram for explaining a process until the first substrate 10 and the second substrate 20 are bonded to each other.

  The manufacturing method of this embodiment is suitable for manufacturing a small panel that is easily affected by variations in the amount of liquid crystal dripping. For example, the panel size (diagonal dimension) is a 0.8 to 12 inch panel. The substrate size is not limited, and multiple panels can be attached to the main surface.

  It is assumed that a gap material (spacer) having a height of about 4 μm is disposed on the first substrate in order to appropriately maintain a distance from the opposing second substrate.

  A seal pedestal layer 40 is formed on the first substrate 10 (see FIGS. 2A and 2B). The seal pedestal layer 40 is formed so as to surround the filling region of the liquid crystal 30. Further, since it is necessary to prevent the liquid crystal from leaking, the liquid crystal is formed to have a closed curve. The line width is about 0.8 mm. The line width of the sealing material 50 applied on the seal pedestal layer 40 is about 0.65 mm. If the patterning accuracy of the seal material 50 is ± 0.1 mm, the line width of the seal pedestal layer 40 is preferably set to be 0.1 mm or more wider than the line width of the seal material 50.

  The seal pedestal layer 40 can be formed using a color filter layer forming process. That is, when the black matrix layer 11, the RGB colored resist layer 12, and the overcoat layer 14 are sequentially formed by photolithography, the corresponding layers 41, 42, and 43 are also formed at positions corresponding to the seal portion 60. Laminate. As a result, a seal pedestal layer 40 that is about 3 μm higher than the color filter layer in the display region can be formed.

For example, when a liquid crystal display device having a cell gap of 3.0 μm is manufactured, the thicknesses of the layers constituting the color filter layer and the seal pedestal layer 40 can be as follows.
Film thickness of the colored resist layer 12 (corresponding layer 42) = 0.7 μm
Film thickness of black matrix layer 11 (corresponding layer 41) = 1.0 μm
Film thickness of overcoat layer 13 (corresponding layer 43) = 1.1 μm
In such a case, the film thickness L1 of the seal pedestal layer 40 is 4.1 μm. At this time, m + L2 = 3.0 μm + 2.1 μm = 5.1 μm. Therefore, a seal pattern may be formed by adding a spacer member (gap material) 52 with n = 5.1 μm−4.1 μm + 0.1 μm = 1.1 μm to the seal material 50.

  In addition, in order to form a liquid crystal display device having a cell gap of 4.0 μm with the thickness of each layer as described above, a spacer member (gap material) 52 with n = 2.1 μm is added to the sealing material to form a sealing pattern. May be formed.

  On the other hand, when a 2.0 μm liquid crystal display device is manufactured, L1 = 3.4 μm, except for the layer 42 for one color of the colored resist layer 12 formed on the seal pedestal layer 40. Since m + L2 = 2.0 μm + 2.1 μm = 4.1 μm, a spacer member (gap material) 52 with n = 0.8 μm may be added to the seal material 50 to form a seal pattern.

  The seal pedestal layer 40 can also be formed by curing the resin precursor alone after forming the color filter layer. For example, a pattern is formed from the material of the seal pedestal layer 40 at a position corresponding to the seal portion 60 by photolithography, a dispenser, or a screen printing method. As a material of the seal pedestal layer 40 in such a case, acrylate resin or the like can be used. The seal pedestal layer 40 formed of a resin precursor is preferably cured before patterning of the sealing material 50, and preferably does not flow at room temperature.

  After the seal pedestal layer 40 is thus formed, the alignment film 14 is formed next. Then, the pattern of the sealing material 50 is formed on the seal pedestal layer 40 by a dispenser or a screen printing method (see FIG. 2C).

  The alignment film 14 is about 0.1 μm. Therefore, a layer corresponding to the alignment film 14 may be further laminated on the seal pedestal layer 40 by using the step of forming the alignment film 14. Then, the pattern of the sealing material 50 may be formed on the seal pedestal layer 40 on which the alignment film 14 layers are laminated.

  At this time, the outer peripheral seal frame 80 along the outer edge may be provided on the first substrate 10. The reason why the outer peripheral seal frame 80 is provided is to seal the region between the outer peripheral seal frame 80 and the pattern of the inner sealing material 50 in a vacuum when two substrates are bonded together. If this region is evacuated, the pressure can be reliably bonded using the atmospheric pressure when the pressure is returned to the atmospheric pressure. The outer peripheral seal frame 80 is a portion that is cut off in the chamfering step, and its role is substantially different from the pattern of the seal material 80 that seals the liquid crystal. A plurality of outer peripheral seal frames 80 having such a function may be provided.

  The material of the sealing material 50 may be a material that is usually used for bonding substrates of liquid crystal display devices. For example, UV curable resins such as acrylate resins and modified epoxy resins. A spacer member (gap material) is blended in the sealing material 50 in order to ensure a desired thickness of the sealing material 50 layer when the two substrates are bonded together. The spacer member is preferably fine particles of an insulator. For example, beads having a diameter of about 1 μm and silicon fibers are blended in an amount of 0.5 to 5%.

  Note that the pattern of the sealing material 50 may be formed at a position corresponding to the sealing portion 60 of the second substrate 20.

  Next, in a vacuum, one or two drops of the liquid crystal 30 are dropped on the display region, and the two substrates are attached and sealed (see FIG. 2D). And after returning to atmospheric pressure, ultraviolet irradiation is performed, and also it heats at about 120 degreeC with a heating furnace for about 1 hour, and the sealing material 50 is hardened.

  The process of bonding two substrates and filling the liquid crystal has been described above. Thereafter, the liquid crystal display device is completed by a known manufacturing process (cleaning, chamfering step, polarizing plate pasting step, etc.).

  The liquid crystal display device to which the embodiment of the present invention is applied and the manufacturing method thereof have been described above.

  According to the embodiment, it is possible to prevent the liquid crystal 30 from entering the seal portion 60 and leaking when an excessive amount of the liquid crystal 30 is dropped. That is, the phenomenon that the liquid crystal 30 enters the sealing material 50 as shown in FIG. 3 can be suppressed. In the figure, reference numeral 51 denotes the liquid crystal 30 that has entered the sealing material 50. According to the above embodiment, the degree k of the entry 51 can be suppressed. In other words, a panel having a cell gap that is allowed as a specification can be manufactured even when the amount of dripping is more “rough” compared to the conventional method.

  The present invention is not limited to the above embodiment. The above embodiment can be variously modified.

  For example, the sealing material base layer 40 may be provided on at least one of the first substrate 10 and the second substrate 20. That is, it may be provided on the second substrate 20.

  Further, as shown in FIG. 4 (a cross-sectional view of the end portion of the liquid crystal display device), a sealing material pedestal layer 40 may be provided on both of the two substrates. In this way, the seal gap n can be narrowed.

  Further, as shown in FIG. 5 (a cross-sectional view of the end portion of the liquid crystal display device), a groove 40 h into which the gap member 52 can be fitted may be provided in the seal pedestal layer 40. Such a groove can be formed by forming a resin layer serving as a bank on both sides by photolithography or the like. If it carries out like this, the gap material 52 can be reliably kept in the predetermined position of the seal pedestal layer 40, and the desired seal gap n can be achieved easily. The gap material 52 is sized so as not to be completely buried in the groove 40h. Specifically, the height of the gap member 52 (diameter in the case of beads) / the depth of the groove 40h is preferably 1.1 or more. When smaller than 1.1, the height of the gap material 52 and the seal pedestal layer 40 may be close to each other, and the seal pedestal layer 40 and the counter substrate (second substrate 20) may come into contact with each other. In that case, since the upper surface of the seal pedestal layer 40 is flat, the sealing material 50 remains between the seal pedestal layer 40 and the counter substrate. At this time, if the remaining amount of the sealing material 50 is partially different, it causes variation in the cell gap.

  Further, as shown in FIG. 6 (cross-sectional view of the end portion of the liquid crystal display device), the shape of the seal pedestal layer 40 may be formed so that the cross-section is raised with an arc (in other words, a kamaboko type). In this way, if the zenith 40t is curved, it comes into contact with the opposing substrate not by a surface but by a line, so that the adhesion is improved. That is, when the zenith is a flat surface, variation in the remaining amount of the sealing material 50 existing between the seal pedestal layer 40 and the counter substrate (second substrate 20) can be reduced, and variation in gap can be suppressed.

<Example>
Examples of the present invention will be described below, but the present invention is not limited thereto.

  In this example, the liquid crystal display device shown in FIG. 1 was manufactured by the manufacturing process shown in FIG. Specifically, a 42 × 31.5 2-inch small liquid crystal display panel was produced. As the gap material, polystyrene beads having a diameter of 4 μm were used.

  When the first substrate (color filter substrate) 10 is manufactured, a black matrix layer, R, G, and B colored resist layers are overlaid on the position corresponding to the seal portion 60, and an overcoat layer is further formed thereon. did. And the sealing material base layer 40 whose thickness L1 is 3 micrometers thicker than thickness L2 of the layer of a display area was produced. At this time, the black matrix 11 is a resin of about 1 μm.

  Next, after the alignment film 14 was formed in the display area of the first substrate 10, the sealing material 50 was applied on the sealing material pedestal layer 40 by a dispenser. The sealing material 50 is an ultraviolet curable resin and contains 0.5% silica fiber 52 having a diameter of 1 μm.

  Next, two drops of the liquid crystal 30 were dropped on the display area, and the second substrate (TFT substrate) 10 was aligned and bonded in a vacuum chamber.

  After returning the inside of the chamber to atmospheric pressure, the bonded substrates were taken out, irradiated with ultraviolet rays, and further heated at 120 ° C. for 1 hour in a heating furnace to cure the sealing material 50. Thereafter, the substrate was cut to complete a liquid crystal display panel.

  In the completed panel, liquid crystal leakage did not occur, and the phenomenon that the internal liquid crystal 30 entered the sealing material 50 as shown in FIG.

  Heretofore, the embodiments and examples of the present invention have been described.

  Finally, the shape and arrangement of the seal pedestal layer 40 included in the present invention will be summarized.

  7 to 14 are sectional views of the seal portion. Each shows a state before and after the bonding of the two substrates 10 and 20 (the “left figure” is before bonding. The “right figure” is after bonding). In each figure, the left side of the seal portion is the inside of the panel filled with the liquid crystal 30 and serving as a display area.

  As shown in FIG. 7A, the seal pedestal layer 40 can be formed on the first substrate (color filter substrate) 10. This is the aspect described in the above embodiment. In such a case, the seal pedestal layer 40 can be formed together with the formation of the layer for forming the color filter by the material used for the formation of the color filter (colored resist layer, black matrix layer).

  Further, as shown in FIG. 7B, a seal pedestal layer 40 can be formed on the second substrate (TFT substrate) 20. In this case, the seal pedestal layer 40 can be formed together with the formation of the layer for forming the TFT, using the material used for forming the TFT (wiring film, insulating film, protective film, etc.).

  Further, as shown in FIG. 7C, seal pedestal layers 40a and 40b may be formed on both the first substrate 10 and the second substrate 20, respectively. In this case, it is not necessary to make each of the seal pedestal layers 40a and 40b thick, and the manufacturing process can be simplified.

  Further, as shown in FIG. 8A, the seal pedestal layer 40 may include two banks 40m and 40n on the inner side and the outer side, and a groove 40h may be formed between them. The banks 40m and 40n draw a closed loop surrounding the display area. The sealing material 50 including the gap material 52 is applied to the groove 40h. This corresponds to FIG. 5 described above. In such a case, the seal gap n can be extremely narrowed, the area of the sealing material 50 in contact with the liquid crystal 30 can be reduced, and contamination of the sealing material 50 can be suppressed.

  Further, as shown in FIG. 8B, the seal pedestal layer 40 may include only the inner bank 40m. Even in such a case, the seal gap n can be extremely narrowed, the area of the sealing material 50 in contact with the liquid crystal 30 can be reduced, and contamination of the sealing material 50 can be suppressed.

  Moreover, as shown in FIG.8 (C), the seal base layer 40 may be provided with only the outer bank 40n as needed.

  Further, as shown in FIG. 9A, a bank 40m and a bank 40n may be formed on the first substrate 10, and a groove 40h may be formed therebetween. A series of seal pedestal layers 40a are formed on the second substrate 20 so as to cover the banks 40m, the grooves 40h, and the banks 40n. The banks 40m and 40n draw a closed loop surrounding the display area. The sealing material 50 including the gap material 52 is applied to the groove 40h. In this way, it is not necessary to make each layer thick. Further, the seal gap n can be extremely narrowed, the area of the sealing material 50 in contact with the liquid crystal 30 can be reduced, and contamination of the sealing material 50 can be suppressed.

  Further, as shown in FIG. 9B, a mode in which the bank 40n in FIG. 9A is not provided can be implemented. Even in such a case, the seal gap n can be extremely narrowed, the area of the sealing material 50 in contact with the liquid crystal 30 can be reduced, and contamination of the sealing material 50 can be suppressed.

  Moreover, as shown in FIG.9 (C), the aspect which does not provide the bank 40m in the said FIG. 9 (A) is also implementable as needed.

  Further, as shown in FIGS. 10A and 10B, the widths of the banks 40m and 40n in FIG. 8A may be asymmetric. Further, as shown in FIGS. 10C and 10D, the widths of the banks 40m and 40n in FIG. 9A may be asymmetric. For example, the width of the inner bank 40m is made larger than the width of the outer bank 40n. Alternatively, the width of the inner bank 40m is made smaller than the width of the outer bank 40n. Which one should be selected may be appropriately selected based on the design concept.

  Further, the widths of the banks 40m and 40n may not be constant. You may form so that the width | variety may change according to the distance from the board | substrate (the 1st board | substrate 10 or the 2nd board | substrate 20) in which the banks 40m and 40n are formed. 11 to 14 show examples of such a case.

  11 (A), FIG. 11 (B), FIG. 11 (C), and FIG. 11 (D) are the above-mentioned FIG. 8 (A), FIG. 8 (B), FIG. 8 (C), and FIG. Corresponds to (A). The surfaces of the banks 40m and 40n far from the position where the sealing material 50 is applied (in the case of the bank 40m, the surface on the display area side. In the case of the bank 40n, the surface on the opposite side of the display area side) is approximately perpendicular to the substrate. is there. On the other hand, the surface close to the position where the sealing material 50 is applied (in the case of the bank 40m, the surface on the opposite side to the display region side. In the case of the bank 40n, the surface on the display region side) is stepped or inclined. That is, the banks 40 m and 40 n are formed so that the width thereof becomes narrower as the distance from the first substrate 10 increases. In FIG. 11A, the groove 40h becomes narrower as the depth increases.

  FIGS. 12A, 12B, 12C, and 12D are respectively the same as FIGS. 8A, 8B, 8C, and 9 described above. Corresponds to (A). The surfaces of the banks 40m and 40n close to the position where the sealing material 50 is applied (in the case of the bank 40m, the surface on the opposite side of the display region side. In the case of the bank 40n, the surface on the display region side) is approximately perpendicular to the substrate. is there. On the other hand, the surface far from the position where the sealing material 50 is applied (in the case of the bank 40m, the surface on the display region side. In the case of the bank 40n, the surface on the opposite side of the display region) is stepped or inclined.

  FIGS. 13A, 13B, and 13C correspond to FIGS. 8A, 8B, and 8C, respectively. The banks 40m and 40n are coated with a surface close to the position where the seal material 50 is applied (in the case of the bank 40m, the surface on the opposite side of the display area. In the case of the bank 40n, the surface on the display area side) and the seal material 50 are applied. On both surfaces of the surface far away from the position (in the case of the bank 40m, the surface on the display area side. In the case of the bank 40n, the surface on the opposite side of the display area side) is stepped or inclined.

  14A, 14B, and 14C correspond to the above-described FIGS. 9A, 9B, and 9C, respectively. The banks 40m and 40n are coated with a surface close to the position where the seal material 50 is applied (in the case of the bank 40m, the surface on the opposite side of the display area. In the case of the bank 40n, the surface on the display area side) and the seal material 50 are applied. On both surfaces of the surface far away from the position (in the case of the bank 40m, the surface on the display area side. In the case of the bank 40n, the surface on the opposite side of the display area side) is stepped or inclined.

1 is a cross-sectional view of a liquid crystal display device to which an embodiment of the present invention is applied. 4A and 4B illustrate a manufacturing process of a liquid crystal display device. The figure for demonstrating the penetration phenomenon to the sealing material of a liquid crystal. 1 is a cross-sectional view of a liquid crystal display device to which an embodiment of the present invention is applied. 1 is a cross-sectional view of a liquid crystal display device to which an embodiment of the present invention is applied. 1 is a cross-sectional view of a liquid crystal display device to which an embodiment of the present invention is applied. 7A to 7C are cross-sectional views of a liquid crystal display device to which an embodiment of the present invention is applied. 8A to 8C are cross-sectional views of a liquid crystal display device to which an embodiment of the present invention is applied. 9A to 9C are cross-sectional views of a liquid crystal display device to which an embodiment of the present invention is applied. 10A to 10D are cross-sectional views of a liquid crystal display device to which an embodiment of the present invention is applied. 11A to 11D are cross-sectional views of a liquid crystal display device to which an embodiment of the present invention is applied. 12A to 12D are cross-sectional views of a liquid crystal display device to which an embodiment of the present invention is applied. 13A to 13C are cross-sectional views of a liquid crystal display device to which an embodiment of the present invention is applied. 14A to 14C are cross-sectional views of a liquid crystal display device to which an embodiment of the present invention is applied.

Explanation of symbols

10: First substrate (color filter substrate)
11 ... Black matrix, 12 ... Color resist, 13 ... Overcoat layer,
14 ... alignment film 20 ... second substrate (TFT substrate), 21 ... alignment film,
30 ... Liquid crystal 40 ... Sealing material base layer 50 ... Sealing material 52 ... Gap material

Claims (8)

A liquid crystal display device in which a liquid crystal is sandwiched between a first substrate and a second substrate,
The first substrate and the second substrate are bonded by a sealing material provided so as to surround the liquid crystal filling region,
The first substrate is a color filter substrate having a color filter layer on the substrate;
The first substrate has a pedestal layer provided with the sealing material thereon,
The sealing material includes a gap material,
The pedestal layer thereon, a groove, an inner bank provided in Table display region side than the groove, which has a, the sealing material is provided on the inside and the inner bank of the groove The gap material is provided inside the groove,
The thickness of the pedestal layer is thicker than the thickness of the color filter layer corresponding to the display area and thicker than the thickness of the liquid crystal layer,
The thickness of the sealing material layer is equal to or less than the thickness of the liquid crystal layer corresponding to the display region,
A liquid crystal display device, wherein a pedestal layer thicker than the color filter layer and a sealing material thinner than the liquid crystal layer are formed over the entire periphery of the display region. The liquid crystal display device according to claim 1,
The pedestal layer is
A liquid crystal display device comprising: a layer similar to the layer forming the color filter layer of the first substrate. The liquid crystal display device according to claim 1,
The pedestal layer is
A liquid crystal display device comprising: a layer different from a layer forming the color filter layer of the first substrate. The liquid crystal display device according to claim 1 ,
On the pedestal layer outside the groove, has an outer bank,
The liquid crystal display device, wherein the sealing material is also provided on the outer bank. A color comprising a first substrate and a second substrate, wherein the first substrate and the second substrate sandwich a liquid crystal, and the first substrate has a color filter layer on the substrate. A method of manufacturing a liquid crystal display device which is a filter substrate,
Applying a sealing material including a gap material on the pedestal layer formed on the first substrate and having a groove and an inner bank on the inner side thereof, so as to surround the liquid crystal filling region;
Filling liquid crystal inside the pedestal layer and the sealing material;
Bonding the first substrate and the second substrate after filling with the liquid crystal,
The sealing material is
When the first substrate and the second substrate are bonded together, the first substrate and the second substrate are provided in the groove and on the inner bank, and the thickness of the layer corresponds to the display region provided with the color filter layer. Formed to be less than the thickness of the liquid crystal layer
The gap material is provided inside the groove,
The thickness of the pedestal layer is thicker than the thickness of the color filter layer corresponding to the display area and thicker than the thickness of the liquid crystal layer,
A manufacturing method of a liquid crystal display device, wherein a pedestal layer thicker than the color filter layer and a sealing material thinner than the liquid crystal layer are formed over the entire periphery of the display region. It is a manufacturing method of the liquid crystal display device according to claim 5 ,
The pedestal layer is
A method of manufacturing a liquid crystal display device, comprising: forming a layer similar to the layer forming the color filter layer of the first substrate. It is a manufacturing method of the liquid crystal display device according to claim 5 ,
The pedestal layer is
A method for manufacturing a liquid crystal display device, comprising: a layer different from a layer forming a color filter layer of the first substrate. It is a manufacturing method of the liquid crystal display device according to claim 5 ,
On the pedestal layer outside the groove, has an outer bank,
The method for manufacturing a liquid crystal display device, wherein the sealing material is also provided on the outer bank.

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