JP2008076500A - Liquid crystal cell and device for laminating liquid crystal cell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cell structure which prevents the reduction in optical performance of a liquid crystal cell by reducing internal stress during initial gap formation, which is brought about in a substrate, and reducing the occurrence of distortion due to aging, and a cell substrate laminating device for manufacturing the liquid crystal cell. <P>SOLUTION: In the liquid crystal cell constituted by laminating a pair of substrates provided with transparent electrodes to each other by a first adhesive having a granular spacer mixed in an adhesive material and then enclosing a liquid crystal material into a space between the pair of substrates, the first adhesive is applied to at least three positions like spots in an outer peripheral part of an optical effective range formed by the transparent electrodes, and an outermost peripheral part of the pair of substrates is provided with a seal member having an enclosing hole through which the liquid crystal material is charged. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a liquid crystal cell and a bonding apparatus for the same, and more particularly to a liquid crystal cell and a bonding apparatus for the same that reduce the occurrence of distortion in a substrate and prevent deterioration of optical performance.

There are various types of liquid crystal cells such as monochrome, color, active type, passive type, TN type, STN type, ferroelectric type, and antiferroelectric type, and the structure differs depending on the difference between these types. Usually, a cell is configured by bonding a pair of substrates having a transparent electrode pattern on the inside via a seal member. In order to make the distance between the pair of substrates uniform, a spacer is generally provided in the optically effective range of the cell, and the spacer is generally mixed in the seal member.
However, in this cell configuration, since the internal spacer exists on the transparent electrode pattern, there is a portion where the optical effect of the liquid crystal material cannot be obtained. Furthermore, alignment disorder of the liquid crystal material occurs around the inner spacer, and the function as a liquid crystal cell is significantly reduced.

Therefore, in order to solve these problems, the internal spacers are selectively distributed in the cells, and the spacing between the substrates is maintained only by the liquid crystal cells in which the spacers are not arranged on the transparent electrode pattern or the spacers in the seal member. There is a method of manufacturing a liquid crystal cell. However, when this method is used, the seal member cures and shrinks more than the dimensions in the printing stage, causing distortion between the pair of substrates, causing the substrate to dent inside the cell, and encapsulating the liquid crystal in this state. However, since the internal pressure and the external pressure of the cell are the same, the distortion of the substrate cannot be completely corrected, and there is a problem that the function as the liquid crystal cell is remarkably deteriorated.
In Patent Document 1, in order to solve this problem, as a liquid crystal sealing device, liquid crystal is injected while a substrate of a pair of cells is adsorbed by a vacuum suction table and the other vacuum suction table, and the injection hole is sealed. An apparatus is disclosed.
JP 2003-287761 A

However, in such a system, since the flatness of the substrates is ignored and the interval between the substrates is forcibly secured, the following problems occur. That is, when the substrate is bonded to the sealing member, the substrate is forced to have the same thickness as the sealing material, so that stress is generated on the substrate and internal stress strain may be generated on the substrate. In addition, when the liquid crystal is sealed, since the substrate is vacuum-sucked, stress is generated on the substrate, and internal stress strain may be generated on the substrate. Furthermore, after encapsulating the liquid crystal, the volume of the liquid crystal and the substrate expands and contracts due to changes in the environmental temperature, which may cause distortion in the substrate. Thus, various problems arise.
As described above, since the substrate is forcibly deformed and bonded and vacuum-adsorbed, internal stress is generated in the substrate, and even if a predetermined gap can be secured during gap forming, the substrate itself has internal stress. Therefore, there is a high possibility that the predetermined gap will change with the environmental changes in temperature and humidity over time. In addition, a change in the volume of the liquid crystal after the liquid crystal is encapsulated causes a stress on the substrate, which significantly reduces the function of the liquid crystal cell.

When vacuum suction is performed, high accuracy is required for the flatness of the vacuum suction table, but flatness processing of 3 to 5 μm or less is extremely difficult, and maintenance is not easy. For example, even if minute dust (about 2 to 3 μm) or oil adheres to the vacuum suction table, it is highly likely that the gap of the liquid crystal cell will be affected, leading to performance degradation. In particular, in the case of a liquid crystal cell that requires a gap of several μm with a cell gap of about 5 μm, it is considered that the performance is significantly deteriorated.
In order to solve the above-described problems, the present invention reduces internal stress at the time of forming an initial gap generated in a substrate, and also reduces the occurrence of strain due to changes over time (such as changes in temperature and humidity environment). Accordingly, it is an object of the present invention to provide a liquid crystal cell in which a decrease in optical performance is prevented and a liquid crystal cell bonding apparatus for producing such a liquid crystal cell.

In order to achieve the above-mentioned object, the invention according to claim 1 is characterized in that a pair of substrates provided with transparent electrodes are pasted with a first adhesive in which granular spacers are mixed in an adhesive material, and the pair after pasting. In a liquid crystal cell configured by enclosing a liquid crystal material in a gap between the substrates, the first adhesive is applied in spots to at least three places on the outer periphery of the optical effective range formed by the transparent electrode, The liquid crystal cell is characterized in that a sealing member having a sealing hole for injecting a liquid crystal material is provided on the outermost peripheral portions of the pair of substrates.
According to a second aspect of the present invention, in the liquid crystal cell according to the first aspect, the sealing member is a liquid crystal cell having viscoelasticity.
According to a third aspect of the present invention, in the liquid crystal cell according to the first or second aspect, a second adhesive made of an adhesive material not containing the spacer is applied to at least two locations in the vicinity of the seal member, and the second The center of a circle connecting the application centers of the adhesive is characterized by a liquid crystal cell that is the same as the center of the circumference passing through at least three locations of the first adhesive.

According to a fourth aspect of the present invention, in the liquid crystal cell according to the first or second aspect, the first adhesive is a liquid crystal cell coated circumferentially around the outer periphery of the optical effective range.
A fifth aspect of the present invention is a liquid crystal cell bonding apparatus for bonding the liquid crystal cell according to any one of the first to third aspects, wherein the pair of substrates are mounted on an upper surface having a convex spherical shape portion at a lower portion. A pedestal to be placed, a fixed base having a concave shape and fitting the convex shape portion to fix the cradle, and a first adhesive applied to the pair of substrates facing the cradle. A liquid crystal cell including a pressurizing unit for bonding the pair of substrates by pressing, wherein the upper surface of the cradle and the pressurizing unit are provided with convex portions at least at three positions corresponding to the first adhesive. Features a bonding device.

A sixth aspect of the present invention is a liquid crystal cell laminating apparatus for laminating a liquid crystal cell according to the fourth aspect of the present invention, wherein a convex spherical shape portion is provided on the lower surface and a cradle for placing the pair of substrates on the upper surface, and a concave portion. A fixed base that fits the bottom surface of the base having a convex shape and fixes the base; and the first adhesive that is applied to the pair of substrates in a circumferential manner so as to face the base. A liquid crystal cell including a pressurizing unit that bonds the pair of substrates by pressurization, and the upper surface of the cradle and the pressurizing unit are provided with a cylindrical convex portion at a position corresponding to the first adhesive. Features a bonding device.
According to a seventh aspect of the present invention, in the liquid crystal cell bonding apparatus according to the fifth or sixth aspect, an ultraviolet ray is formed by providing a hole in the convex portion provided on the upper surface of the cradle or the pressing portion, and irradiating ultraviolet light from the hole A liquid crystal cell laminating apparatus provided with irradiation means is characterized.

  The cell structure and the cell substrate bonding apparatus of the present invention can reduce the warpage of the cell substrate, reduce the initial strain of the substrate, and reduce the strain over time, and can accurately achieve a predetermined uniform target cell gap over a long period of time. It can be held well and the performance of the liquid crystal cell can be ensured.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing a liquid crystal cell in a first embodiment of the present invention.
1A is a front view showing an outline of the liquid crystal cell 20, FIG. 1B is a schematic sectional view of FIG. 1A, and FIG. 1C is a first adhesive containing a spacer. FIG. The configuration of the first adhesive 2 shown in FIG. 1C is the same in the following examples.
As shown in FIG. 1A, the liquid crystal cell 20 according to the first embodiment has a pair of glass substrates 1 bonded to each other by a first adhesive 2 made of a spacer 6 and an adhesive material 16. In the liquid crystal cell constructed by injecting a liquid crystal material into the gap, the first adhesive 2 is at least spot-shaped on the outer periphery of the optically effective range 3 of the liquid crystal cell 20 (a region where a transparent electrode (not shown) is provided). Three locations are provided, and the outermost peripheral portion of the glass substrate 1 is sealed with a sealing member 5 having a sealing hole 4 for injecting a liquid crystal material (not shown).
The seal member 5 is a seal member made of a viscoelastic material such as silicon.

In order to obtain the liquid crystal cell 20 shown in FIG. 1, first, in the outer peripheral portion of the region corresponding to the optically effective range 3 of the liquid crystal cell (installation region of a transparent electrode not shown) on the glass substrate 1, FIG. A first adhesive 2 containing a spacer 6 as shown is dropped in a spot shape. The spot size of the first adhesive 2 needs to be examined based on the area of the optical effective range 3, but the spot size of the adhesive 2 is too large. Since the glass substrate 1 in the optically effective range 3 is distorted, it is desirable to make the diameter as small as possible within a range in which necessary adhesive strength can be secured.
Incidentally, from the adhesive strength of the first adhesive 2, when the optical effective range is about 30 mm, the spot diameter of the adhesive 2 is desirably about 1 mm to 2 mm.

As the pair of glass substrates 1, planar substrates polished in advance so as to ensure necessary flatness are used.
By bonding and holding the pair of glass substrates 1 at three points, the parallelism of the pair of glass substrates is not impaired by the bonding.
Further, when the environmental temperature of the liquid crystal cell changes, the adhesive is provided at three points, and therefore contracts and expands in the plane of the liquid crystal cell with the center of the optical effective range 3 of the liquid crystal cell as a reference. Accordingly, since the three-point spot-like adhesive 2 also contracts and expands with respect to the center of the optical effective range 3, the glass substrate 1 is in a convex or concave direction (a direction perpendicular to the optical effective range of the liquid crystal cell). It is difficult for the glass substrate 1 to be warped and the parallelism of the glass substrate 1 is impaired.

In particular, the reason for dripping the adhesive in a spot shape is that it is likely to become a spot shape when dripped in the process, but the three points of the adhesive 2 are pressed from the outside of the pair of glass substrates 1, and the spacer is removed. When the adhesive 2 is cured, there is an effect that the pressing force at the three points can be distributed in a contrasting and uniform manner while ensuring a uniform cell gap (distance between the glass substrates 1). If the vicinity of the center position is pressed, there is an effect that distortion generated in the glass substrate 1 can be reduced.
By sealing the outer periphery with a sealing member 5 such as silicon having viscoelasticity, stress that deteriorates the parallelism does not act on the pair of glass substrates 1, so that the parallelism of the glass substrate is maintained even after sealing. It can be secured.

Further, by using the sealing member 5 having viscoelasticity, even after the liquid crystal is sealed from the sealing hole 4, even if the liquid crystal contracts and expands due to a change in temperature environment, the volume change of the liquid crystal material is absorbed by the deformation of the sealing member 5. Therefore, the distortion of the optically effective range of the cell in the direction perpendicular to the glass substrate 1 is reduced.
That is, even if in-plane expansion and contraction of the substrate and liquid crystal volume change in the cell occur, the sealing member 2 is easily deformed to absorb the volume change. Can be maintained.

  As described above, by using a three-point spot-like adhesive and a seal member having viscoelasticity at the outer periphery, it is possible to bond while ensuring flatness with a single substrate without forcibly holding it down. Therefore, the distortion of the substrate due to adhesion can be reduced. In addition, in the case of three-point bonding, the flatness is not forcibly matched with the adhesive including the spacer, so that a pair of glass substrates can be joined with a small pressing force without applying an excessive force to the glass substrate 1. Therefore, even if the thickness of the adhesive changes with time, the internal stress applied to the substrate is small and reliability can be ensured.

FIG. 2 is a diagram showing a second example of the liquid crystal cell in the present invention. FIG. 2A is a front view of the liquid crystal cell 30 according to the present embodiment, and FIG. 2B is a schematic cross-sectional view.
The liquid crystal cell 30 in FIG. 2 is the same as the liquid crystal cell 20 in FIG. 1 except that the first adhesive 1 is provided circumferentially on the outer periphery of the optical effective range 3 of the liquid crystal cell. This is a liquid crystal cell in which a portion is sealed with a sealing member 5 having a sealing hole 4 for injecting a liquid crystal material.
The basic process of providing the adhesive 2 is the same as that of the three-point adhesion of the spot adhesive shown in FIG. Since the shrinkage and expansion associated with the temperature change of the glass substrate 1 changes with the center of the circumference as a reference, no warpage of the substrate occurs. Moreover, the same effect can be expected even when the pressing surface has three points.

Thus, by providing the adhesive 2 on the circumference on the outer periphery of the optically effective range 3, liquid crystal can be sealed only in the optically effective range, so that the amount of liquid crystal to be sealed can be reduced.
Further, since the outer periphery of the cell is sealed by the viscoelastic seal member 5, as described in FIG. 1, the movement due to the contraction and expansion of the substrate can be absorbed, so that the substrate is not warped.
With the configuration described above, the amount of liquid crystal to be sealed can be reduced, the cost can be reduced, and the volume change due to the expansion of the liquid crystal can be absorbed because the viscoelastic member is used for the seal member 5, and the convexity of the cell can be absorbed. By preventing deformation and concave deformation, it is possible to prevent deterioration of the optical performance of the liquid crystal cell.

FIG. 3 is a diagram showing a third example of the liquid crystal cell in the present invention. FIG. 3A is a front view of the liquid crystal cell 40 according to the present embodiment, and FIG. 3B is a schematic cross-sectional view.
The liquid crystal cell 40 in FIG. 3 is provided with the second adhesive 13 that does not contain a spacer in at least two locations in the vicinity of the seal member 5 at the outermost periphery in the liquid crystal cell 20 in FIG. The center of the circle connecting the application centers (the center of two points when there are two adhesives 13) is a liquid crystal cell that is the same as the center of the circle passing through at least three adhesive application portions of the adhesive 2.
With such a configuration, even if shrinkage and expansion occur due to a temperature change or the like in the pair of glass substrates 1, the first adhesive 2 in the outer peripheral portion of the optical effective range 3 and the seal member 5 in the outer peripheral portion. Since the application position of each of the adjacent adhesives 13 contracts and expands only by the same distance in the radial direction with respect to the center of the optical effective range of the cell, warpage in the uneven direction does not occur with respect to the optical effective range 2.

  Note that the spacer 13 is not included in the outer peripheral adhesive 13 because the gap of the glass substrate 1 is made uniform only in the outer peripheral part of the optically effective range 3 provided with the first adhesive 2, and in the vicinity of the seal member. This is because the agent does not include a spacer to prevent distortion of the glass substrate 1 in the gap direction. If spacers are provided both on the outer periphery of the optical effective range 3 and in the vicinity of the seal member 5, distortion occurs due to dimensional variations of the spacer on the inner side (outer peripheral portion of the optical effective range 3) and the outer side (near the seal member 5). For this reason, spacers should not be provided on the adhesive 13 on the outer peripheral portion.

In the liquid crystal cell shown in FIGS. 1 and 2, for example, when the cell is attached to the device at the outer peripheral portion of the liquid crystal cell, the cell thickness at the outer peripheral portion is reduced by fastening it with a clasp in the thickness direction of the cell. If force is applied in the direction of making the cell thinner at the outer periphery of the cell at this time, the center of the liquid crystal cell (optically effective range) is warped in the convex direction and the optical performance of the liquid crystal cell deteriorates. It will be done.
Here, by providing the adhesive 13 on the outer peripheral portion, even if a force is applied in the thickness direction of the cell on the outer periphery, warping in the effective range is less likely to occur, and the flatness of the substrate in the effective range is ensured. it can.
As described above, by providing the adhesive 13 on the outer peripheral portion, it is possible to increase the strength in the thickness direction of the cell and ensure the substrate plane accuracy within the optically effective range even when it is fixed to the apparatus. Further, by arranging the adhesives 2 and 13 concentrically, it is possible to prevent uneven warpage due to thermal contraction and expansion of the substrate, and it is easy to ensure reliability.

FIG. 4 is a schematic view showing a first liquid crystal cell bonding apparatus of the present invention.
The upper surface of the cradle 7 of the liquid crystal cell bonding apparatus 50 is a flat surface, and has a convex spherical surface portion 8 on the lower surface. A fixed base 9 having a concave spherical shape portion that mates with the convex spherical surface 8 is installed in a pressure device (not shown), and is pressurized by a pressure portion 11 that opposes the upper surface of the cradle 7, whereby a pair of glass substrates 1 are attached. to paste together.
At this time, the convex part 10 is provided in the position corresponding to the adhesive agent 2 provided in the glass substrate 1 at spot shape on the pressurization part 11 and the cradle 7 upper surface.

When the pressing part 11 moves downward and the convex part 10 on the pressing part side comes into contact with the glass substrate 1 placed on the cradle 7, the convex spherical part 8 slides in the concave spherical part. Thus, the cradle 7 is parallel to the pressurizing portion and can pressurize the three points of the adhesive 2 in a uniform direction.
Therefore, in the cell structure described above, it is possible to hold the pair of cell substrates in parallel with high accuracy with a small applied pressure.
The concave spherical surface of the fixing base 9 is not particularly limited to a spherical surface, but may be a conical surface or a simple cylindrical concave shape as long as the convex spherical surface of the cradle slides and becomes parallel to the pressure surface. Moreover, the convex part 10 provided in the pressurizing part 11 of FIG. 4 may be used as a pin slidable in the pressurizing direction, and may be pressurized in combination with a spring or the like.

By adopting the above-described configuration, the pressure force can be reduced and the parallelism between the pressurizing unit 11 and the cradle 7 can be secured with high accuracy when the glass substrate 1 is bonded. It can be made uniform and the stress generated in the glass substrate 1 can be reduced.
In addition, since a spacer 6 such as a bead is included in the adhesive 2 and the position of the adhesive 2 including the spacer 6 is pressurized, the cell gap (distance between the glass substrates 1) depends on the dimension of the spacer 6. And kept uniform. Further, since the surface of the glass substrate 1 other than the adhesive spot range of the three points is not pressed, the stress that bends the substrate does not work.
Therefore, the glass substrate 1 can ensure the target cell gap uniformly while ensuring the flatness of a single product.

As an apparatus for laminating the liquid crystal cell 30 of FIG. 2, in the liquid crystal cell laminating apparatus 50 described above, adhesion is provided circumferentially on the outer periphery of the optically effective range 3 on the upper surface of the pressure unit 11 and the cradle 7. A cylindrical convex portion matching the shape of the adhesive 2 may be provided at a position corresponding to the agent 2.
The basic configuration is the same as that in which the pressing portion 11 and the cradle 7 shown in FIG. 2 are provided with the convex portion 10 that matches the position of the spot-like adhesive 2, and the operational effects are also the same.
The circumferential adhesive 2 includes a plurality of spacer members in the adhesive, but the spacers have dimensional variations. Therefore, the cell gap is restricted at three points of the large spacer among the plurality of spacers. However, the arrangement of the spacers in the circumferential adhesive 2 changes every time it is applied, and it is difficult to regulate the position. When the pressing is performed with three convex portions as in the sticking device of FIG. 4, the position of the large spacer is shifted from the position of the convex portion, and stress is generated on the substrate.

In such a case, the glass substrate 1 can be prevented from warping by being pressed by the cylindrical convex portion, and can be bonded to the substrate without generating stress. Further, as shown in FIG. 4, if the fixing portion and the cradle slide on a spherical surface and the pair of glass substrates 1 can be pressurized in a parallel state, the gap is formed according to the dimensions of three large spacers. And it becomes possible to ensure the parallelism of a pair of glass substrate 1.
Further, since the pressing force on the glass substrate 1 can be reduced, the parallelism of the pair of glass substrates 1 can be secured without generating stress on the substrates, and the change in parallelism is not affected by the volume change due to the temperature change. There are few, and it becomes easy to ensure reliability.

FIG. 5 is a schematic view of a second liquid crystal cell bonding apparatus 60 according to the present invention.
Optically effective range 2 Adhesive 2 provided in a spot or circumferential manner on the outer periphery of the optically effective range 2, and provided on the upper surface of the pressurizing part 11 and the cradle 7 corresponding to the adhesive 13 or at the center of either convex part. A hole 14 is provided.
Here, the example which provided the hole 14 in the convex part by the side of the pressurization part 11 is shown.
The pressurizing unit 11 is provided with means (ultraviolet irradiation means) 15 for irradiating ultraviolet light from the holes 14.
The adhesive application position of the pair of glass substrates 1 is pressed by the convex portions, and at this time, the adhesive is irradiated with ultraviolet rays, so that the adhesive can be effectively cured.

In the case of using the liquid crystal cell 30 in FIG. 2, the adhesive 2 is applied on the circumference, but the holes 14 for ultraviolet irradiation are provided at equally divided positions on the cylindrical convex portion, and after the ultraviolet irradiation curing. The cell may be removed from the bonding apparatus, and then the entire adhesive on the circumference may be irradiated with ultraviolet rays from the direction perpendicular to the substrate to cure the uncured portion of the adhesive. Similarly, if the spot-like adhesive application position is once cured and then removed from the apparatus and irradiated with ultraviolet rays, no curing will occur.
As described above, the adhesive can be cured from the central portion of the adhesive at the adhesive application position, and stress is not exerted on the substrate when the adhesive is cured and contracted. Therefore, it is easy to ensure the flatness of the substrate.

  Since the gap is very narrow when irradiated with ultraviolet rays from the outer periphery, sufficient light cannot be applied to the adhesive-applied part, and curing of the adhesive from the irradiation direction can only be performed from the outer peripheral part from the in-plane direction of the gap. For this reason, the curing of the adhesive starts from the irradiation direction, and the substrate is warped. Since ultraviolet rays can be irradiated from the vertical direction of the substrate, curing starts from the center of the adhesive, and there is an effect that warpage of the substrate can be prevented without generating stress on the substrate.

The figure which shows the 1st example of the liquid crystal cell in this invention. The figure which shows the 2nd example of the liquid crystal cell in this invention. The figure which shows the 3rd example of the liquid crystal cell in this invention. Schematic which shows the 1st liquid crystal cell bonding apparatus of this invention. Schematic which shows the 2nd liquid crystal cell bonding apparatus of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Board | substrate, 2 1st adhesive agent, 3 Optical effective range, 4 Enclosure hole, 5 Seal member, 6 Spacer, 7 Base, 8 Convex spherical surface part, 9 Fixing base, 10 Convex part, 11 Pressurizing part, 13 Second adhesive, 14 holes, 15 means for irradiating ultraviolet light, 20, 30, 40 liquid crystal cell, 50, 60 liquid crystal cell pasting device

Claims (7)

A pair of substrates each having a transparent electrode is pasted with a first adhesive in which granular spacers are mixed in an adhesive material, and a liquid crystal is formed by enclosing a liquid crystal material in a gap between the pair of substrates after the pasting In the cell
The first adhesive is spot-applied to at least three spots on the outer periphery of the optically effective range formed by the transparent electrode, and has a sealing hole for injecting a liquid crystal material on the outermost periphery of the pair of substrates. A liquid crystal cell provided with a sealing member.   2. The liquid crystal cell according to claim 1, wherein the seal member has viscoelasticity.   3. The liquid crystal cell according to claim 1, wherein at least two second adhesives made of an adhesive material not containing the spacer are applied in the vicinity of the seal member, and a circle connecting the application centers of the second adhesives. The center of the liquid crystal cell is characterized in that the center is the same as the center of the circumference passing through at least three portions of the first adhesive.   3. The liquid crystal cell according to claim 1, wherein the first adhesive is applied circumferentially to the outer periphery of the optically effective range. 4.   A liquid crystal cell bonding apparatus for bonding a liquid crystal cell according to any one of claims 1 to 3, wherein a convex spherical shape portion is provided at a lower portion and a pedestal for placing the pair of substrates on an upper surface, and a concave shape. A fixed base that fits the convex shape portion and fixes the cradle, and pressurizes the first adhesive applied to the pair of substrates so as to face the cradle. A liquid crystal cell laminating apparatus comprising: a pressure unit to be bonded, wherein the upper surface of the cradle and the pressure unit are provided with convex portions at least at three positions corresponding to the first adhesive. .   5. A liquid crystal cell laminating apparatus for laminating a liquid crystal cell according to claim 4, wherein a convex spherical shape portion is provided at a lower portion, a cradle for placing the pair of substrates on an upper surface, and a concave shape having the convex surface shape portion. And the pair of substrates are bonded together by pressurizing the first adhesive applied circumferentially to the pair of substrates so as to face the cradle. A liquid crystal cell bonding apparatus, comprising: a pressing portion, wherein the upper surface of the cradle and the pressing portion are provided with a cylindrical convex portion at a position corresponding to the first adhesive.   The liquid crystal cell laminating apparatus according to claim 5 or 6, further comprising an ultraviolet irradiation means for irradiating ultraviolet light from the hole provided in the convex portion provided on the upper surface of the cradle or the pressurizing portion. A liquid crystal cell bonding apparatus.

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