JP2000137234A - Liquid crystal cell having control pattern of sealing coat and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal cell with a narrow frame and high quality by sealing sealing material in adjacent to pixel area with regulating slippage of a coating position of sealing material sealing two substrates and with suppressing edge waviness of sealed sealing material. SOLUTION: A sealing position regulating pattern 100 and a sealing waviness regulating pattern 90 are formed in a periphery of at least one substrate of two substrates 50, 60 constituting a liquid crystal cell. As positioning accuracy of a coated sealing material 120 is improved and waviness in an edge of the sealed sealing material enable to make reduce or lose by these pattern, a space between the pixel area and the coated sealing material is possible to be minimized. And as enabling to bring a pixel area 70 as near as possible to surroundings of the liquid crystal cell, a liquid crystal sell dealing with a narrow frame without thickness irregularity enable to be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display panel in which the vicinity of two opposing substrates is sealed with a sealing material. The present invention relates to a pattern for controlling a position where a sealing material is applied when two substrates forming a liquid crystal cell are sealed in the vicinity of the periphery, and a method for applying the seal. Specifically, the present invention relates to providing a display panel having a narrow frame (narrow frame) by bringing a sealing material and a pixel end close to each other in a peripheral portion of a liquid crystal cell formed by sealing two substrates.

[0002]

2. Description of the Related Art Liquid crystal cells are used as display panels for watches, calculators and the like. In recent years, the field of application is expanding to mobile devices (information terminal devices) or large display devices.

FIG. 1 is a cross-sectional view of an ordinary liquid crystal cell formed by opposing two substrates to face each other and sealing the vicinity of the periphery with a sealing material (eg, epoxy resin). As shown in FIG. 1, in a conventional liquid crystal display panel, first, a sealing material 30 (epoxy resin) is applied to the vicinity of a peripheral portion of a first substrate 20 made of smooth hard glass or the like. An internal gap material (spacer) 4 is provided on the first substrate to keep the cell thickness constant over the entire surface of the cell including the pixel region 13.
0 is sprayed at a constant rate. By laminating the second substrate 10 made of hard glass on the first substrate 20 and firing (press-contact heating), the sealing material 30 is cured and the liquid crystal cell is sealed by the adhesive force.

In a typical configuration of this liquid crystal cell, one substrate includes a color filter (CF) and the other substrate includes a thin film transistor (TFT). Liquid crystal is injected into the liquid crystal cell at a constant interval between the two substrates through a gap by a known method.

FIG. 2 shows that a conventional liquid crystal cell includes a sealing material 3.
This indicates that the following problems are involved in the application state of 0. The first problem is that the sealing material 30 applied to the substrate 20
The position is shifted. The center position 33 of the applied sealing material
Is about 0.2 to 0.3 mm. The second problem is that the sealing material 30 is irregularly formed on the edge 36 of the sealing material due to fluctuations in the amount of application when the dispenser is applied, the planar state of the substrate 20, and the manner of applying heat during firing. The wave phenomenon 36 occurs. In the present invention, FIG.
This phenomenon shown in (c) is called "undulation" 36. The undulations 36 of the sealing material 30 have a variation range of about 150 to 200 μm only on one side of the sealed sealing material 30.

[0006] The problem of misalignment of the seal application and undulation of the edge of the sealed seal material causes the seal material to affect the liquid crystal in the pixel area, causing display unevenness. The sealing material for sealing the two substrates comes into contact with the edge of the pixel region depending on the location due to uneven application, and causes poor alignment of the liquid crystal molecules in that region. In order to avoid such a cause of the poor display quality, an extended portion having a fixed width from the edge of the pixel region 13, that is, the dummy pixel 1
6 and the like are extended to provide a predetermined distance (about 1 mm) between the pixel region and the sealing material.

As described above, in the conventional liquid crystal cell, it is impossible to apply the sealing material as close as possible to the pixel region, and it is necessary to provide a certain width between the pixel region 13 and the sealing material. The proportion of the frame area was large.

In particular, when the width of the frame (the distance from the pixel region to the outer periphery) is large, the spacer 4 of the pixel region 13
With only 0, the gap in the picture frame cannot be kept constant.
In the conventional spacer 40, the thickness of the pixel region 13 can be defined, but the thickness cannot be made uniform on the outer periphery of the cell including the frame region and the application region of the sealant 30 as with the pixel region. That is, when the liquid crystal cell is baked, the effect of maintaining the uniform cell thickness by the spacers on the pixels 13 does not reach the vicinity of the periphery of the liquid crystal cell. Thus, the thickness of the liquid crystal cell is distorted in the frame portion, causing display unevenness.

For example, Japanese Patent Laid-Open No. Hei 4-20929 discloses that
The disclosure discloses a liquid crystal cell in which irregularities are provided on the periphery of two substrates, a sealing material is applied to the irregularities, and the substrate is sealed to face another substrate. By providing this uneven pattern on the seal application portion, the adhesive strength is strengthened, moisture is prevented from entering the liquid crystal cell, and the reliability as a display panel is guaranteed. However, even if the seal material is applied with some positional deviation from the uneven pattern,
It is not clear where the position of the applied sealing material is positioned in the concavo-convex pattern. This cited example does not intend that the application position of the sealant can be controlled only by the concavo-convex pattern provided on the peripheral portion of one substrate.

Japanese Patent Application Laid-Open No. 52-54947 discloses
A surplus drop groove is provided near the periphery of one substrate forming a liquid crystal cell along the application position of the sealant. 2
In the process of sealing together the substrates, the excess of the sealing material flows into the grooves. The irregular wave phenomenon (undulation) at the time of sealing the sealing material is eliminated along the groove line. The edges of the pixels of this liquid crystal cell become beautiful, and the product value as a display panel is improved. However, in order to define the sealing time of the sealing material along the groove line over the entire length, it is necessary that the applied amount of the seal is substantially constant over the entire length. Moreover, the distance between the application position and the groove needs to be substantially constant. Because
This is because when the excess of the applied sealing material cannot be accommodated in the groove, the swell extends beyond the groove. In this cited example, when the excess amount of the sealing material is excessive with respect to the volume of the groove, the seal extends beyond the groove, and the effect of reducing the undulation of the edge of the sealed sealing material is small.

Japanese Patent Application Laid-Open Nos. 63-256924 and 4-163422 disclose a pattern (so-called thickness control pattern) for inserting a spacer just outside a cut line of a liquid crystal cell. This pattern provides a liquid crystal cell having a uniform thickness over the entire surface. In addition, a good liquid crystal cell with uniform substrate spacing and no color unevenness is provided. However, between the pixel area and the thickness control pattern outside the cut line, there is a certain width of an area where the thickness cannot be made uniform even if the spacer exists. In particular, in the conventional liquid crystal cell having a wide frame, it is not possible to avoid distortion of the cell gap due to shrinkage of the epoxy near the seal during firing only by the pixel region and the spacer on the thickness control pattern of the cited example.

Particularly in recent years, mobile devices such as notebook computers and personal data assistants (P
DA), with the spread of handy horns, the demand for liquid crystal display panels compatible with narrow picture frames has increased. like this,
In response to a demand for a liquid crystal cell having a narrow frame, positioning for applying a sealing material for sealing two substrates forming the liquid crystal cell is required. It is also desired to reduce or eliminate the undulation of the edge of the sealed sealing material. In addition, it is desired that the pixel region be wide with respect to the frame of the liquid crystal cell and that the cell thickness be uniform even in the vicinity of the peripheral portion.

[0013]

SUMMARY OF THE INVENTION An object of the present invention is to form a sealing material for sealing two substrates by adjusting a shift of a coating position of the sealing material and sealing the sealing material close to a pixel region. It is to provide a liquid crystal cell.

Another object of the present invention is to provide a liquid crystal cell formed by suppressing the undulation of the edge of a sealant sealing two substrates and sealing the sealant close to a pixel area. is there.

Another object of the present invention is to provide a liquid crystal cell having a small cell thickness by providing a region of a sealing material for sealing the two substrates in close proximity to the pixel region and by providing a spacer in the pixel region. is there.

[0016]

A convex pattern for a seal position control pattern or a waviness control pattern is formed around at least one of two substrates forming a liquid crystal cell. By these patterns, the positioning accuracy of the applied sealing material is increased, and the undulation of the edge of the sealed sealing material can be reduced or eliminated, and the image area and the applied sealing material are made as close as possible. Make it possible.
In addition, since the pixel region can be brought as close as possible to the vicinity of the periphery of the liquid crystal cell, it is possible to provide a liquid crystal cell with a uniform thickness and a narrow frame.

According to the present invention, there is provided a first substrate having a convex pattern (seal position control pattern) which is provided along a periphery and near a peripheral portion and includes an upper surface for defining a coating position of a seal material on one surface; A sealing material applied to the upper surface of the convex pattern of the first substrate, and a second substrate having a surface facing the one surface of the first substrate, wherein the upper surface of the convex pattern is a sealing material. It has wettability to the sealing material is applied as a symmetrical shape with respect to the center of the upper surface,
A liquid crystal cell formed by sealing the second substrate with a sealing material positioned in a convex pattern of the first substrate and a cell manufacturing method are provided.

According to the present invention, there is provided a first substrate provided with a convex pattern (undulation control pattern) on one surface along a periphery along a coating position of a sealing material near a peripheral portion; A sealing member applied along a pattern; and a second substrate having a surface facing the one surface of the first substrate, wherein the applied sealing material includes a first substrate and a second substrate. The present invention provides a liquid crystal cell and a cell manufacturing method in which the sealing material is crushed when the substrate is sealed, and the edge of the sealing material extends in the convex pattern.

[0019]

FIG. 3 shows a state in which the vicinity of the periphery of two substrates 50 and 60 is sealed with a sealing material 120. FIG. This figure is a typical example of the present invention in a sectional view of a peripheral structure of a liquid crystal cell. The first substrate is a color filter substrate (C
F substrate) 60 and a second substrate (T substrate) including a TFT.
(FT substrate) 50. FIG. 3 shows the peripheral structure of the cell with the CF substrate 60 down for convenience of description of the present invention.

In the present invention, two convex patterns 90 are provided in the seal application area located outside the pixel area 70 of the liquid crystal cell.
・ 100 is given. These two patterns, the seal waviness control pattern 90 and the seal application position control pattern 100, have a function of adjusting the application state of the sealant 120. By controlling the application position of the sealing material 120,
Since the sealing width of the sealant 120 with respect to the pixel pattern 70 can be limited to a small value, a liquid crystal cell corresponding to a narrow frame can be provided.

In this embodiment, two convex patterns 90 and 100 for controlling the adhesion state of the sealing material 120 are formed on the lower CF substrate 60. In another embodiment,
These convex patterns may be provided on the TFT substrate 50 on the upper surface. In addition, the undulation control pattern 90 is formed by the CF substrate 60 and T
It is also possible to adopt a hybrid structure in which the edges 36 of the sealing material on both surfaces of the FT substrate 50 are provided (up to four locations).

These patterns 90 and 100 are
By using the process of forming the zero pixel region 70, the pixel region 70 can be formed conveniently. The pixel area 70 is generally
The upper surface of a coloring layer (color filter layer) for providing three primary colors (RGB) is formed by a transparent electrode ITO (In Sn Oxid).
e) having a structure covered by e). When forming the colored layer and the ITO layer in the pixel area, the colored layer and the ITO layer of an arbitrary color are simultaneously attached to the positions of the convex patterns 90 and 100, and the convex pattern can be formed by appropriately patterning. In this way, in the embodiment shown in FIG. 3, the swell control pattern 90 and the position control pattern 100 are formed of a colored layer having an ITO layer on the surface,
The height is the same as the pixel area 70.

The convex patterns 90 and 100 may be formed with various heights and materials by a process different from the process of forming the pixel region 70. However, as described below, the material of the surface of the patterns 90 and 100 needs to have wettability with respect to the sealing material 120. In addition, the sealing material 120 is a thermosetting resin, and has a lower viscosity than normal temperature in a heating state by an intermediate heat treatment (hereinafter, referred to as calcination).

In the present embodiment, the IT of the patterns 90 and 100
Epoxy resin is used as a sealing material having a certain wettability with respect to the upper surface 105 of O. However, the sealing material 120 is not limited to the epoxy resin, and may use another adhesive resin such as an acrylic resin in design. When such another sealing material is used, wetting with the material of the upper surface 105 of the patterns 90 and 100 (wet).
It is necessary to select the material of the upper surface 105 of the patterns 90 and 100 and the sealing material 120 in consideration of the ting) property.

As shown in FIGS. 4A and 5B, the sealing material near the periphery of the liquid crystal cell is positioned on the upper surface 105 of the projection 100 and adheres in a symmetrical shape. . FIG. 3 shows that when the two substrates 50 and 60 are overlapped, the sealing material 120 is almost evenly spread on both sides of the convex portion 100 of the sealing position control pattern. In addition, with respect to the edge 36 of the sealed sealing material 120, the swell is suppressed in the swell control pattern on the side of the convex pattern 90. Hereinafter, the functions of the seal application position control pattern 100 and the seal waviness control pattern 90 will be described in detail.

First, the seal application position control pattern 100 for the applied seal material 120 will be described. In an actual manufacturing process, the sealing material 120 is applied to the upper surface 105 of the convex portion of the seal application position control pattern 100 with a slight shift. FIG. 4A shows a state in which a convex portion is provided as a typical application position control pattern 100, and a sealing material 120 is actually applied to the upper surface 105 thereof. Usually, the sealing material 120 is filled in the dispenser, and is injected from the nozzle of the dispenser onto the upper surface 105 of the convex portion 100 formed near the periphery of the substrate 60. As shown in FIG.
Even when the nozzle is positioned on the upper surface 105 of the nozzle, there may be a positional shift. During the application of the seal, the dispenser is positioned on the upper surface 105 with this displacement, and
00 along the longitudinal direction. For example, FIG.
As shown in FIG.
Is about 20 to 30 μm with respect to the width of the projection of 300 μm.

The sealing material 120, for example, epoxy, applied to the substantially horizontal upper surface 105 of the projection 100 is subjected to an intermediate heat treatment in order to volatilize and remove the solvent contained in the epoxy. This heat treatment is called pre-baking, and is performed at 70 ° C to 90 ° C.
Done in The viscosity of the sealing material in the heated state is somewhat reduced in FIG. The decrease in the viscosity of the sealing material 120 causes the applied sealing material 120 to flow and deform. On the other hand, the ITO on the upper surface 105 has wettability to epoxy. The toughness of the upper surface 105 of this material ITO causes the fluidized epoxy 120 to adhere to the upper surface 105 in a symmetrical shape. That is, as shown in FIG. 4A, the applied sealing material is applied to the upper surface 105 of the convex portion 100 despite the slight displacement of the application position of the upper surface 105.
Is positioned so as to form a symmetrical shape with respect to the center.

The substantially horizontal upper surface 105 of the convex portion 100 determines the range and amount of the applied sealing material 120 depending on the wettability of the upper surface and the surface tension of the sealing material. Therefore, when the sealing material 120 is applied to the upper surface 105,
Does not require precise positioning of the dispenser.
The sealing material 120 applied to the upper surface 105 is fluidized due to a decrease in viscosity, and has an advantage that accurate positioning of the sealing material 120 is performed.

In FIG. 4A, an excessive amount of the sealing material 120 may be applied to the upper surface 105 of the projection 100 in some cases. The sealing material 120 whose viscosity has decreased due to calcination or the like.
The excess flows down from one or both edges of the upper surface 105. At that time, an appropriate amount of the sealing material on the upper surface 105 of the projection 100 is also continuously flown. It is necessary to apply an appropriate amount of the sealing material 120 to the upper surface 105 so as not to flow down from the end of the upper surface 105. Projection 100 of position control pattern
The appropriate amount of the sealing material 120 applied to the upper surface 105 is determined by the size (width or area) of the upper surface 105 and the viscosity in a heating state by an intermediate heat treatment (temporary firing).

The mechanism for adjusting the position of the applied sealing material 120 has been described above with reference to the seal position control pattern 100 using one convex portion as a typical example (a). As shown in FIG. 4, one having a plurality of convex portions arranged in parallel (b), one having left and right asymmetrical shapes (c), a stripe having a thick width in the center and stripes provided with gaps on both sides thereof ( An embodiment in which stripes of various widths are combined, such as d), can be considered. The combination of these various convex portions is selected depending on where the stable position of the sealing material 120 is to be obtained by fluidizing the applied sealing material 120 by lowering the viscosity.

FIG. 5 shows a specific example in which the periphery of two substrates constituting a liquid crystal cell is sealed by a sealing material 120 applied to the upper surface 105 of the convex portion 100 of the position control pattern. In particular, the change in the application state of the sealing material from FIG. 5A to FIG. 5B indicates a state in which the position of the sealing material 120 applied to the upper surface 105 of the projection 100 is adjusted. As an example, the sealing material 120 is provided on the upper surface 105 of the projection 100.
20 to 30 μm for the 300 μm width of the projection 100
The coating is applied along the longitudinal direction of the projection with a slight positional shift.

In the step (b), an intermediate heat treatment is performed to volatilize and remove the solvent contained in the sealing material 120, that is, the epoxy. This heat treatment is performed at 70 ° C. to 90 ° C., and the viscosity of the heated epoxy itself decreases. The sealing material 120 having reduced viscosity has properties as a fluid. The sealing material 120 flows on the upper surface 105 and the upper surface 10
5 is attached in a substantially symmetrical collapsed shape. The sealing material 120 on the upper surface 105 made of ITO is positioned at the center of the upper surface 105 irrespective of the displacement of the application. In addition, the decrease in viscosity due to heating of the sealing material and the wettability of the upper surface 105 made of ITO with respect to the sealing material reduce the variation in the application amount of the sealing material 120 applied along the longitudinal direction of the convex portion 100 and reduce the application. And make the width almost constant.

FIGS. 5 (c) and 3 show a state in which another substrate 50 is overlapped and sealed with the applied sealing material 120 positioned as shown in FIG. 5 (b). The epoxy of the sealing material 120 is cured by firing at 120 ° C. to 200 ° C., and seals the two substrates 50 and 60. The sealing material flows out evenly from both ends of the convex portion 100 and the upper surface 105.
Due to the wettability, the two substrates are sealed symmetrically with respect to the projection 100 to have a fixed width.

On the other hand, even if the application position and the application width of the sealing material 120 are adjusted, the swelling phenomenon already described in the related art is present on the edge 36 of the sealing material 120 which is symmetrically spread right and left of the projection 100. Has occurred. FIG. 5D or FIGS. 2A and 2C show how the edge 36 of the sealing material undulates. FIG. 5D shows the projection 100 of FIG.
3 is a top view in the longitudinal direction of FIG.

The applied sealing material 120 does not form a straight line exactly, but has a wavy state of about 150 to 200 μm at the left and right edges as shown in FIG. 5D. If there is a large undulation at the edge 36 of the sealing material, the sealing material 1
Even if the position of the sealing member 120 is accurately determined, the sealed sealing material 120 may come into contact with the pixel region 70. Seal material 1
The presence of the undulation of the edge 36 of the 20 indicates that the applied sealing material 1
Similarly to the displacement of 20, the sealing material 120 affects the liquid crystal molecules in the pixel region 70 to cause a defective display region at the edge of the pixel.

In order to suppress the undulation 36 at the time of sealing the edge of the sealing material 120, a seal undulation control pattern 90 is used.
Are formed over the edge 36 of the sealing material 120. In FIG. 3 (or FIG. 6A) showing a typical embodiment of the present invention, the swell control pattern 90 is shown as having two convex portions.

The present invention is not limited to this embodiment, and various undulation control patterns 90 are given in FIGS. 6 (a) to 6 (c). The sealing material 120 crushed by overlapping the substrate 50 on the substrate 60 spreads, and the pattern 9
It is possible to select a combination of projections of various sizes so that the range of the edge 36 can be limited by the wettability of the upper surface of the zero.

For example, the pattern 9 shown in FIG.
In the case of 0, the sealing material 120 contacts the first convex portion while having the undulating edge 36. The first convex portion works to suppress undulation. The surplus of the sealing material 120 is 1
It can get over the th convex part. Seal material 120 that got over
Is in contact with the second projection, in contact with the second projection,
The second protrusion serves to limit the flow of the sealing material 120 and reduce undulation. By providing this pattern 90, finally, only on one side, the conventional 150 to 200 μm
The undulation of the sealing material 120 giving the degree of fluctuation is 2
It is reduced to about 0 to 30 μm. Then, when the surplus of the seal material 120 beyond the first convex portion is accommodated in the concave portion, a beautiful seal material edge 36 is provided along the longitudinal line of the second convex portion, and the undulation is eliminated.

In FIG. 3, the swell control pattern 90 is different from the position control pattern 100 in the pixel area 70.
And is not shown on the glass cut line 130 side. Cut the swell control pattern 90
It may also be provided on the line 130 side and arranged on both sides of the position control pattern 100. In such a case, the sealing material 120
In order to reduce or eliminate the undulation of the left and right edges 36 of the undulation, the width of the sealed sealing material 120 is made more uniform. That is, the area from the outer periphery (cut line) of the liquid crystal cell to the pixel region 70 can be further narrowed, and there is an advantage of providing a high quality narrow frame panel.

The exemplary embodiment of FIG. 3 of the present invention provides a substrate 60 having both a seal position control pattern 100 and a swell control pattern 90 near the periphery. A sealing material 120 is applied to the substrate 60 and the two substrates 50 and 60
Has the advantage that the application area of the sealing material 120 can be reduced to about 0.4 to 0.5 mm with respect to the pixel area 70. When the width of the frame of the conventional liquid crystal cell is 2.0 to 2.4 mm, the amount of reduction of the frame width is 20 to 25 mm.
% Can be provided.

Further, since the frame is narrowed, the effect of making the cell thickness of the spacer provided in the pixel region uniform can be extended to the periphery of the cell. Also, the seal application position control pattern 100 or the swell control pattern 90
By arranging the spacers in the liquid crystal cell, the uniformity of the cell thickness is further maintained over the entire surface of the liquid crystal cell. Furthermore, there is an advantage that the uniformity of the cell thickness can be ensured more reliably by the spacer of the thickness control pattern formed close to the inside and outside of the cut line 130 together with the seal application control patterns 90 and 100.

[0042]

By providing the seal position control pattern 70 or the undulation control pattern 80 in the vicinity of the periphery of the liquid crystal cell, the liquid crystal cell of the present invention has a narrower frame and higher quality than the conventional liquid crystal cell. Becomes

[Brief description of the drawings]

FIG. 1 is a cross-sectional structural view of a conventional liquid crystal cell formed by opposing two substrates to face each other and sealing the periphery thereof with a sealing material.

FIG. 2 shows two glass substrates 1 forming a conventional liquid crystal cell.
0 and 20 are sealed with a sealing material. FIG. 1A is a plan view thereof, and FIG. 1B is a sectional view taken along line AA in FIG. 1A. FIG. 3C shows the undulation of the edge 36 of the sealing material 120.

FIG. 3 is a cross-sectional view of the peripheral structure of the liquid crystal cell of the present invention, showing a state where the vicinity of the periphery of two substrates is sealed with a sealing material.

4 is an upper surface 10 of a convex portion of the application position control pattern 100. FIG.
5 shows a state in which the sealing material is applied, and position adjustment of the application.

FIG. 5 shows a state in which peripheral portions of two substrates forming a liquid crystal cell are sealed by a sealing material 120 applied to an upper surface 105 of a position control pattern 100.

FIG. 6 shows various seal undulation control patterns 90 of the present invention.
Is shown.

[Explanation of symbols]

 10: Substrate or TFT substrate 20: Substrate or CR substrate 30: Sealing material 33: Seal application center 36: Edge of sealed sealing material 40: Spacer 50: Substrate or TFT substrate 60: Substrate or CR substrate 70: Pixel area 80: Cell thickness control pattern 90: Seal undulation control pattern 100: Seal application position control pattern 105: Horizontal top surface 110: Spacer 120: Seal material 130: Cut line

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Toichi Noguchi 1623-14 Shimotsuruma, Yamato-shi, Kanagawa Japan Inside the Yamato Office of IBM Japan, Ltd. 1623 No. 14 IBM Japan, Ltd. Yamato Office F-term (reference) 2H089 LA44 MA04Y NA38 NA42 NA45 QA04 QA14 QA16

Claims (13)

[Claims] A first substrate having a convex pattern (seal position control pattern) on one surface, the convex pattern including an upper surface defining an application position of a sealing material, provided on a periphery of the first substrate; A sealing material applied to the upper surface of the convex pattern of the substrate; and a second substrate having a surface facing the one surface of the first substrate, wherein the upper surface of the convex pattern is It has wettability, the sealing material is applied in a symmetrical shape with respect to the center of the upper surface, and the second substrate is formed by sealing with a sealing material positioned in a convex pattern of the first substrate. Liquid crystal cell. 2. The liquid crystal cell according to claim 1, wherein the first substrate includes a color filter. 3. The liquid crystal cell according to claim 2, wherein the first substrate includes a TFT. 4. The liquid crystal cell according to claim 1, wherein the sealing material is epoxy. 5. The convex pattern includes one convex portion, two convex portions having the same shape arranged side by side, two convex portions that are asymmetrical left and right, or a convex portion having a large width in the center and two narrow portions on both sides. 2. The liquid crystal cell according to claim 1, wherein the liquid crystal cell has a pattern having convex portions. 6. A first substrate further provided with a convex pattern (undulation control pattern) on one surface along the seal position control pattern provided near a peripheral portion, wherein the applied sealing material is 2. The liquid crystal cell according to claim 1, wherein when sealing the first substrate and the second substrate, the sealing material is squashed so that an edge of the sealing material extends to the convex pattern. 7. The first substrate further includes a convex pattern (undulation control pattern) provided on one surface thereof along both sides of the seal position control pattern provided in the vicinity of the peripheral portion. 2. The liquid crystal cell according to claim 1, wherein the sealing material is crushed when sealing the first substrate and the second substrate, and an edge of the sealing material extends to the convex pattern. 8. A first substrate provided on one surface with a convex pattern (undulation control pattern) along the periphery and along the application position of the sealing material near the peripheral portion; And a second substrate having a surface opposing the one surface of the first substrate, wherein the applied sealant includes a first substrate, a second substrate, and a second substrate. A liquid crystal cell formed by being crushed and sealing the edge portion of the sealing material to extend in the convex pattern when sealing. 9. The undulation control pattern includes one projection,
7. The device according to claim 6, comprising two identical projections provided side by side.
9. The liquid crystal cell according to 7 or 8. 10. An upper surface for defining an application position of a sealing material in the vicinity of a peripheral portion along the periphery of one surface of the first substrate,
A step of forming a convex pattern (seal position control pattern) in which the upper surface has wettability with respect to the seal material; a step of applying a seal material to the upper surface of the convex pattern of the first substrate; Liquid crystal, comprising: flowing a sealing material formed into a shape symmetrical with respect to the center of the upper surface; and laminating and sealing a second substrate on the one surface of the first substrate. Cell manufacturing method. 11. The method for manufacturing a liquid crystal cell according to claim 10, wherein said step of forming said symmetrical shape includes a step of positioning the sealing material applied to said upper surface by pre-baking and lowering the viscosity of said sealing material. . 12. The method for manufacturing a liquid crystal cell according to claim 10, wherein said step of superposing and sealing said two substrates includes a step of baking to cure said sealing material. 13. A step of forming a convex pattern (undulation control pattern) in the vicinity of a peripheral portion along one periphery of the first substrate and in the vicinity of a peripheral portion, and applying the seal material. A step of applying a sealing material to a position, and a step of superposing and sealing a second substrate on the one surface of the first substrate, and the step of superposing and sealing the two substrates, A liquid crystal cell characterized in that when the applied sealing material seals the first substrate and the second substrate, the sealing material is crushed to form an edge portion of the sealing material extending in the convex pattern. Manufacturing method.