JPH10268327A - Method for assembling liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the assembling method for a liquid crystal display device which can assemble a liquid crystal display device with improved picture quality at high yield. SOLUTION: On the top surface of an array substrate 10, a sealing material 42 is provided surrounding a display area 10a and formed exceeding the height of spacers 36 provided on the side of a counter substrate 12. While the array substrate 10 and counter substrate 12 are arranged opposite each other, the counter substrate 12 is moved toward the array substrate 10 and those substrates are temporarily sealed with the sealing material 42. At this time, the substrates are temporarily sealed while the tips of the spacers 36 are separated from the display area of the array substrate 10. In this state, the array substrate 10 and counter substrate 12 are moved relatively and positioned. After they are positioned, the counter substrate 12 is pressed against the array substrate 10 until the tips of the spacers 36 come into contact with the display area of the array substrate 10, and both the substrates are actually sealed with the sealing material 42.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method of assembling a liquid crystal display device, and more particularly to a method of assembling a liquid crystal display device having two substrates facing each other with a spacer interposed therebetween.

[0002]

2. Description of the Related Art In general, a liquid crystal display device is constituted by bonding two glass substrates having electrodes to each other via a sealing material and sealing a liquid crystal between the glass substrates. In order to keep the gap between the two glass substrates constant, plastic beads having a uniform particle size are scattered between the glass substrates as spacers.

In addition, there has been proposed a liquid crystal display device in which a projecting spacer is formed on one substrate by using a photoresist or the like instead of a spacer made of particles. The liquid crystal display device configured as described above is usually assembled by the following steps.

That is, first, a glass substrate is suction-held on a pair of upper and lower stages facing each other. In this case, a large number of electrodes are formed on the surface of the glass substrate held on the lower stage, a rectangular frame-shaped sealing material that defines a display area, and a gap between the two glass substrates. A spacer for holding is arranged. The glass substrate held on the upper stage is provided with a counter electrode, a color filter and the like.

In this state, after lowering the upper stage so that the two glass substrates face each other with a predetermined gap,
By moving the upper stage in the X and Y directions and rotating about the Z axis, the two glass substrates are aligned with respect to a predetermined alignment mark or the like.

Subsequently, the upper stage is lowered to a position where the upper glass substrate contacts the sealing material and the spacer on the lower glass substrate. In this case, the resistance when the two glass substrates come in contact with each other via the spacer or the sealing material, the rigidity of the vertical drive of the vertical stage, the degree of parallelism, and
Due to backlash etc. in the Y, θ drive mechanism,
Slight displacement occurs between the two glass substrates.

Therefore, in a state where the two glass substrates are in contact with each other via the sealing material and the spacer, the upper stage is moved again in the X, Y, and θ directions to perform positioning. After the completion of the alignment, pressure is applied so that the gap between the two glass substrates becomes a predetermined value, and the sealing material is cured. After that, liquid crystal molecules are sealed between these glass substrates.

[0008]

However, when positioning is performed by moving one of the glass substrates in a state where the two glass substrates are in contact with each other via the spacer as described above, the two glass substrates are placed on one of the glass substrates. The fixedly formed columnar spacers may strongly scratch and scratch the surface of the alignment film or the like formed on the other glass substrate, and may sink into the color filter layer or the like on the surface of the glass substrate. .

In recent liquid crystal display devices, since there is a strong demand for improvement in image quality, even a slight flaw generated during the manufacturing process is raised as image quality failure, which causes a reduction in manufacturing yield.

An object of the present invention is to provide a method of assembling a liquid crystal display device capable of assembling a liquid crystal display device with improved image quality at a high yield.

[0011]

In order to achieve the above object, a method for assembling a liquid crystal display device according to a first aspect of the present invention includes a first substrate provided with electrodes, a spacer and electrodes. A second substrate, and a sealing material is provided on one of the first and second substrates so as to surround a display region, and the display region of the first substrate contacts the spacer. The first and second substrates are bonded and temporarily sealed via the sealing material so that the first and second substrates face each other in a state in which the first and second substrates are not opposed to each other. At least one of the two substrates is moved to perform alignment between the substrates, and after the alignment is completed, at least one of the first and second substrates is brought into contact with each other via the spacer. Pressurize and seal material It is characterized in that the sealing is cured.

According to a third aspect of the present invention, in the assembling method, a first substrate provided with an electrode and a second substrate provided with an electrode and a spacer having a predetermined height are prepared.
And a sealing material having a height higher than the spacer is provided on one of the second substrates so as to surround the display region, and the first and second substrates are bonded via the sealing material. The first and second substrates are arranged so as to face each other such that the display areas of the first and second substrates face each other at a wider interval than the height of the spacer. After at least one of the second substrates is moved, the substrates are aligned with each other. After the alignment is completed, the first and second substrates are interposed via the spacer.
And pressurizing at least one of the substrates so that the substrates contact each other, and curing the sealing material.

According to a fourth aspect of the present invention, there is provided an assembling method, comprising: preparing a first substrate provided with an electrode; and a second substrate provided with an electrode and a spacer having a predetermined height. A first sealant is provided on one of the first and second substrates so as to surround the display area, and a first sealant having a height higher than the spacer is provided outside the first sealant. The first and second substrates are provided so that the display areas of the first and second substrates face each other at an interval larger than the height of the spacer.
Temporarily bonded together through the sealing material, and at least one of the temporarily sealed first and second substrates is moved to align the substrates. After the alignment is completed, Pressing at least one of the substrates so that the first and second substrates come into contact with each other via a spacer;
The present invention is characterized in that the first and second substrates are bonded to each other via the first sealing material, and the final sealing is performed, and after the final sealing, a portion bonded by the second sealing material is cut off. And

According to the assembling method having the above structure, the first and second substrates are temporarily sealed with a sealing material so that the display area of one of the substrates is not in contact with the spacer. Positioning of the two substrates is performed. Therefore, even when the two substrates are relatively moved during the alignment, it is possible to prevent the display region from being rubbed and scratched by the spacer. After the alignment is completed, at least one of the first and second substrates is pressed to bring the spacer into contact with the display area of both substrates, so that the distance between the two substrates is set to the same predetermined value as the height of the spacer. Set.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. First, the configuration of the liquid crystal display device assembled by the assembling method of the present invention will be described. As shown in FIG. 1, the liquid crystal display device is an active matrix type liquid crystal display device, which includes a rectangular array substrate 10 and a counter substrate 12 which are disposed to face each other, and a liquid crystal composition is provided between these substrates. 14 is enclosed.

The array substrate 10 has a rectangular glass substrate 16.
And a rectangular display area 10a is provided on the surface of the glass substrate. In the display area 10a, a large number of scanning lines 18 and signal lines (not shown) are formed in a matrix, and a pixel electrode 20 made of ITO is formed near an intersection between each scanning line and the signal line. . Each pixel electrode 20 is connected to a scanning line and a signal line via a thin film transistor (hereinafter, referred to as TFT) 22 having amorphous silicon. The number of the pixel electrodes 20, that is, the number of pixels of the liquid crystal display device is 100 in each of the vertical and horizontal directions, and a total of 10000 pixels are provided.

An auxiliary capacitance line 24 is formed below the pixel electrode 20 via a gate insulating film (not shown). Then, the scanning line 18, the signal line, the pixel electrode 20, the TF
An alignment film 26 is formed so as to cover T22. The alignment film 26 is made of, for example, AL-105 as an alignment film material.
1 (manufactured by Nippon Synthetic Rubber Co., Ltd.)
It is formed by performing a rubbing process after coating to a thickness of 00 angstroms.

On the other hand, the counter substrate 12 includes a rectangular glass substrate 30, and a rectangular display area 12a is provided on the surface of the glass substrate. In the display area 12a, a large number of coloring layers 34R, 34 functioning as color filters are provided.
G, 34B, counter electrode 38, spacer 36, alignment film 40
Etc. are formed.

More specifically, a matrix-shaped light-shielding layer 32 is formed on the display area of the counter substrate 12, and is arranged to face the scanning lines 18 and signal lines on the array substrate 10 side. The light-shielding layer 32 is formed by applying a photosensitive black resin to the surface of the glass substrate 30, drying, exposing using a photomask having a predetermined pattern, further developing with an alkaline aqueous solution, and baking at 200 ° C. for 60 minutes. To a thickness of 2.0 μm.

A red coloring layer 34R, a green coloring layer 34G, and a blue coloring layer 34B are formed on the display region 12a of the counter substrate 12, and are formed between the light shielding layers 32 in a predetermined arrangement. I have.

The red colored layer 34R is made of a UV-curable acrylic resin resist CR-2000 in which a red pigment is dispersed.
Display area 12a (manufactured by Fuji Hunt Technology Co., Ltd.)
The resist is applied to the entire surface, and the resist is exposed through a photomask that irradiates light only to a portion to be colored red, including a portion where formation of a spacer to be described later is desired.
% By developing with an aqueous solution.

Similarly, the edge and the blue colored layers 34G and 34B
Is repeatedly formed including the formation region of the spacer,
Bake at 230 ° C. for 1 hour. Here, as a green coloring material, CG-2000 (Fuji Hunt Technology Co., Ltd.)
CB-2000 (manufactured by Fuji Hunt Technology Co., Ltd.) as a blue coloring material.

On the other hand, the colored layers 34R, 34 as described above
By overlapping G and 34B, a large number of rod-shaped spacers 36 projecting substantially perpendicularly from the counter substrate 12 side are formed. These spacers 36 are formed on the shielding layer 32 and are formed at positions facing the scanning lines 18 in the non-pixel portion on the array substrate 10 side. Spacer 3
The height of 6 is set to about 5 μm.

Light-shielding layer 32, coloring layers 34R, 34G, 34
A counter electrode 38 made of ITO is formed on B, and an alignment film 40 is formed on the counter electrode. The rubbing direction of the alignment film 40 is set to 135 degrees.

The array substrate 10 and the counter substrate 12 configured as described above are adhered to each other with a sealant 42 interposed therebetween. The sealant 42 is formed in a rectangular frame shape so as to surround the display regions 10a and 12a of the array substrate 10 and the counter substrate 12, for example. The extended end of each spacer 36 is in contact with the portion on the scanning line 18 in the display area 10a on the array substrate 10 side. Thereby,
The array substrate 10 and the counter substrate 12 face each other with a gap of 5 μm.

The alignment films 26 and 40 are opposed to each other so that the rubbing direction is shifted by 90 degrees. The liquid crystal composition 14 is sealed between the array substrate 10 and the counter substrate 12. As the liquid crystal composition 14, ZLI-1565 is used.
(E. Merck Co., Ltd.) What added Iwt% is used. An electrode transfer material (not shown) for applying a voltage from the array substrate 10 to the counter electrode 12 is provided outside the seal material 42.

Next, an assembling apparatus used for assembling the liquid crystal display device having the above configuration will be described. As shown in FIG. 2, the assembling apparatus 50 includes a bonding mechanism 52 for bonding two substrates of the liquid crystal display device, and a supply mechanism 54 for supplying the substrate to the bonding mechanism 52. The bonding mechanism section and the supply mechanism section are provided on the main body frame 56.

The bonding mechanism 52 has an upper stage 58 and a lower stage 60 which are arranged to face each other. These stages 58 and 60 are formed in a rectangular plate shape and arranged substantially horizontally. The lower stage 60 is fixedly provided on the main body frame 56.

The upper stage 58 is mounted on an XY-θ stage 62 functioning as a position adjusting mechanism.
The XY-θ stage 62 is movable in the X and Y directions in a horizontal plane, and is rotatable around a vertical axis. Also, the XY-θ stage 62
Is guided by a guide 65 provided on the main body frame 56.
It is supported and guided so as to be able to move up and down along the vertical direction, and is driven to move up and down by a driving mechanism 64 provided on the upper part of the main body frame 56.

The upper stage 58 can be adjusted in position with respect to the lower stage 20 by operating the XY-θ stage 62, and the XY-θ stage 62 is driven up and down by the drive mechanism 24. By doing so, it is moved in a direction to approach and separate from the lower stage 60.

The lower surface of the upper stage 58 has a substrate holding surface 58a.
The substrate holding surface has a large number of suction holes (not shown). These suction holes are connected to a vacuum pump 66 via a suction tube. The upper surface of the lower stage 60 constitutes a substrate holding surface 60a, on which a number of suction holes (not shown) are formed. These suction holes are connected to a vacuum pump 68 via a suction tube.

The supply mechanism 54 for supplying a substrate to the upper stage 58 and the lower stage 60 of the bonding mechanism 52 includes
An XY table 70 provided substantially horizontally on the main body frame 56, and a support post 72 vertically provided on the XY table are provided, and the support post can move up and down in the vertical direction. A moving table 74 is attached. The movable base 74 is provided with a horizontally extending, retractable and rotatable support arm 76, and a holding portion 78 for holding the substrate by suction is provided at the extending end of the support arm.

The supply mechanism unit 54 raises and lowers the movable table 74 and expands and contracts and rotates the support arm 76 while holding the substrate by the holding unit 78, so that the substrate is moved to the upper stage 58 and the lower stage 58. 60 respectively.

Next, a method of assembling a liquid crystal display device using the assembling apparatus configured as described above will be described. First, as shown in FIG. 3, an array substrate 10 and a counter substrate 12 having the above-described configurations are prepared.
In the present embodiment, for example, 300 mm × 400 mm
A display area 10a corresponding to two surfaces of an array substrate for manufacturing a 10-inch size liquid crystal display device is formed on a large-sized glass substrate 16 mm, and a sealing material 42 is screen-printed so as to surround each display area 10a. .

As the sealing member 42, a thermosetting epoxy resin is used. The length of the sealing material 42 is about 800 mm per one surface of the array substrate, and about 1600 mm per glass substrate 16. The width of the sealing material 42 is printed at about 200 μm and the height is printed at 25 μm. Note that a liquid crystal injection port 43 is provided in a part of the sealing material 42.
Is provided.

Similarly, the counter substrate 12 is formed by forming a display area 12a for two surfaces of the counter substrate on a large-sized glass substrate 30. Subsequently, as shown in FIG. 4A, the glass substrate 16 for two surfaces of the array substrate is supplied to the supply mechanism 14.
Then, the substrate is supplied to the lower stage 60 of the bonding mechanism unit 12 and is placed on the substrate holding surface 60a of the lower stage with the display area 10a facing upward. In this state, the vacuum pump 68 is operated, and the glass substrate 16 is moved to the lower stage 6 by the suction holes.
0 is held by suction on the substrate holding surface 60a.

In addition, the glass substrate 30 constituting the counter substrate 12 is supplied to the upper stage 58 by the same process as described above, and the vacuum pump 66 is operated so that the display area 12a faces downward and the substrate holding of the upper stage is performed. It is held by suction on the surface 58a. In this state, the upper stage 58 and the counter substrate 12 are moved by the XY-θ stage 62 to the array substrate 1.
0, and the array substrate and the counter substrate are aligned with each other. Thus, the array substrate 10 and the counter substrate 12 are arranged in a state where the display regions 10a and 12a face each other.

Subsequently, as shown in FIG. 4B, the upper stage 58 is lowered together with the XY-θ stage 62 by the drive mechanism 64, and the opposing substrate 12 is moved in a direction approaching the array substrate 10. Then, by bringing the glass substrate 30 on the opposite substrate 12 side into contact with the sealing material 42 on the array substrate 10 side, the glass substrates 16 and 30 are bonded and temporarily sealed.

At this time, the height of the sealing material 42 is
In consideration of the viscosity of the sealing material, the distance between the array substrate 10 and the opposing substrate 12 is about 20 μm, which is larger than the height (5 μm) of each spacer 36.
Is set to about 10 kgf to perform temporary sealing. Thus, the opposing substrate 12 and the array substrate 10 are temporarily sealed in a state where the extending ends of the spacers 36 are separated from the display area 10a of the array substrate 10.

In this state, the XY-θ stage 62 is operated to move the upper table 58 and the opposing substrate 12 to X, Y,
The display area 12a of the opposing substrate is accurately aligned with the display area 10a of the array substrate 10 at a predetermined position by moving in the θ direction.

After the alignment is completed, as shown in FIG. 4C, the upper stage 58 is further lowered together with the XY-θ stage 62 by the drive mechanism 64, and the opposing substrate 12 is moved to the array substrate 10 side. Then, while the sealing material 42 is crushed by the glass substrate 30 on the counter substrate 12 side, the tip of the spacer 36 is
The opposing substrate 12 is lowered until it comes into contact with 0a. Thereafter, the array substrate 10 and the opposing substrate 12 are permanently sealed by heating and curing the sealing material 42. As a result, the array substrate 10 and the counter substrate 12
6 are attached at a predetermined interval corresponding to the height of No. 6, that is, at an interval of 5 μm.

After the bonding, the vacuum pumps 66 and 68 are stopped to release the suction of the array substrate 10 and the counter substrate 12, and the upper stage 58 is moved to the XY-θ stage 62.
And raise it. Subsequently, the bonded array substrate 10 and counter substrate 12 are taken out of the lower stage by a transport mechanism (not shown) and transported to the next liquid crystal filling section.

In the liquid crystal filling portion, a liquid crystal composition is injected into the gap between the two substrates from the liquid crystal injection port 43 of the sealing material 42, and the liquid crystal injection port is sealed with an ultraviolet curable resin or the like. According to the method of assembling the liquid crystal display device configured as described above, the array substrate and the counter substrate are temporarily sealed in a state where the extending end of the spacer 36 is separated from the display area of the array substrate. Substrate alignment is being performed. Therefore, even when the two substrates are relatively moved during the alignment, it is possible to prevent the display region from being rubbed and scratched by the spacer. As a result, it is possible to provide a liquid crystal display device having improved image quality with a high yield by preventing the occurrence of defective alignment and defective images due to scratches. Furthermore,
By performing alignment in a state where the array substrate and the opposing substrate are not in contact with each other via the spacer, highly accurate alignment can be performed, and the image quality can be further improved.

The distance between the two substrates at the time of temporary sealing can be adjusted by controlling the viscosity, height and width of the sealing material, the pressure acting on the two substrates, and the like.
For example, at the time of temporary sealing, the two substrates are supported only by the sealing material arranged at the peripheral portion of the substrate, and the central portion of the upper substrate is bent toward the lower substrate. In particular, this tendency becomes remarkable as the substrate size increases. Therefore, the pressure at the time of temporary sealing is weakly adjusted with the increase in the substrate size, or the viscosity of the sealing material,
By adjusting the amount of application or by performing both of them, the space between the substrates at the time of temporary sealing can be set to a size that does not contact the spacer. Further, when the substrate size is the same and the material and application amount of the sealing material are different, the pressure at the time of temporary sealing can be adjusted.

FIGS. 5 and 6 show a method of assembling a liquid crystal display according to a second embodiment of the present invention. According to the second embodiment, as shown in FIGS. 5 and 6A, the sealant 42 is screen-printed on the glass substrate 16 on the array substrate 10 so as to surround each display area 10a. A second sealing material 80 for temporary fixing is applied to the outside of the sealing material. The second sealing material 80 is mixed with particles having a particle size larger than the height of the spacer 36 provided on the counter substrate 12 side, for example, a ceramic sphere 82 having a diameter of about 30 μm.

The second seal member 80 is provided between the display area 10 a of the array substrate 10 and the display area 12 a of the opposing substrate 12.
And at least 10 mm from the sealing material 42 so as not to affect the cell gap between
6 is applied at a position spaced about 10 mm from the peripheral edge. Further, the second seal material 80 is applied to the four corners of the glass substrate 16 in order to obtain a sufficient effect with a minimum number of applications.

In the assembling apparatus used in the second embodiment, the substrate holding surface 58a of the upper stage 58 and the substrate holding surface 60a of the lower stage 60 have a height of about 0.5 m.
An elastic sheet 84 having a thickness of m is attached.

When the array substrate 10 and the opposing substrate 12 are sealed, first, as shown in FIG.
The glass substrate 16 for the surface is supplied to the lower stage 60 of the bonding mechanism unit 12 by the supply mechanism 14, and the display area 10
The substrate is placed on the substrate holding surface 60a of the lower stage with a facing upward. In this state, the vacuum pump 68 is operated, and the glass substrate 16 is moved by the suction holes to the elastic sheet 8 of the lower stage 60.
4 and hold it by suction.

Further, the glass substrate 30 constituting the counter substrate 12 is supplied to the upper stage 58 by the same process as described above, and the vacuum pump 66 is operated so that the display area 12a faces downward and the elastic sheet of the upper stage is turned on. 84 is held by suction. In this state, the upper stage 58 and the opposing substrate 12 are moved by the XY-θ stage 62 to the array substrate 10.
, And the array substrate and the counter substrate are aligned with each other. Thus, the array substrate 10 and the counter substrate 12 are arranged in a state where the display regions 10a and 12a face each other.

Subsequently, as shown in FIG. 6B, the upper stage 58 is lowered together with the XY-θ stage 62 by the drive mechanism 64, and the opposing substrate 12 is moved in a direction approaching the array substrate 10. Then, the glass substrate 30 on the counter substrate 12 side is replaced with the second sealing material 8 on the array substrate 10 side.
Ceramic sphere 82 mixed in the 0th and second sealing materials
The glass substrates 16 and 30 are attached to each other by temporary contact, and temporarily sealed.

At this time, since the diameter of the ceramic sphere 84 is formed to be about 30 μm, which is larger than the height (5 μm) of each spacer 36, the opposing substrate 12 and the array substrate 1 are formed.
0 is temporarily sealed with the extended end of each spacer 36 separated from the display area 10a of the array substrate 10. at the same time,
The sealing material 42 is also separated from the counter substrate 12.

In this state, the XY-θ stage 62 is operated to move the upper table 58 and the counter substrate 12 to X, Y,
The display area 12a of the opposing substrate is accurately aligned with the display area 10a of the array substrate 10 at a predetermined position by moving in the θ direction.

After the completion of the alignment, as shown in FIG. 6C, the upper stage 58 is further lowered together with the XY-θ stage 62 by the drive mechanism 64, and the opposing substrate 12 is moved to the array substrate 10 side. Then, while the sealing material 42 is crushed by the glass substrate 30 on the counter substrate 12 side, the tip of the spacer 36 is
The opposing substrate 12 is lowered until it comes into contact with 0a.

At this time, the glass substrate 1 on the array substrate 10 side
6 and the portion of the glass substrate 30 on the side of the opposing substrate 12 that is in contact with the ceramic sphere 82, that is, the portion that has been temporarily sealed, is a ceramic sphere 8 without reducing the distance between the substrates.
The same spacing as the diameter of 2 is maintained. Therefore, the peripheral portions of the glass substrates 16 and 30 are deformed so as to be curved outward with respect to the central portion, and the deformation is absorbed by the elastic deformation of the elastic sheets 84 of the upper stage 58 and the lower stage 60. You.

Then, the array substrate 10 and the opposing substrate 12 are permanently sealed by heating and curing the sealing material 42. As a result, the display region 10a of the array substrate 10 and the display region 12a of the counter substrate 12 are bonded at a predetermined interval corresponding to the height of the spacer 36, that is, at an interval of 5 μm.

After the bonding, the vacuum pumps 66 and 68 are stopped to release the suction of the array substrate 10 and the counter substrate 12, and the upper stage 58 is moved to the XY-θ stage 62.
And raise it. Subsequently, the bonded array substrate 10 and counter substrate 12 are taken out of the lower stage by a transport mechanism (not shown) and transported to the next liquid crystal filling section. Further, the temporarily sealed portions of the array substrate 10 and the counter substrate 12 are cut off along the broken line A shown in FIG.

In the liquid crystal filling portion, after injecting a liquid crystal composition from the liquid crystal injection port 43 of the sealing material 42 into the gap between the two substrates, the liquid crystal injection port is sealed with an ultraviolet curable resin or the like. According to the method of assembling the liquid crystal display device according to the second embodiment configured as described above, the second sealing material 80 mixed with particles having a diameter larger than the height of the spacer 36 is used. By temporarily sealing the array substrate and the counter substrate, the array substrate and the counter substrate are temporarily sealed so that the extending end of the spacer 36 is separated from the display area of the array substrate. It is carried out. Therefore, even when the two substrates are relatively moved during the alignment, it is possible to prevent the display region from being rubbed and scratched by the spacer. As a result, it is possible to prevent the occurrence of defective alignment and defective images due to scratches, and to assemble a liquid crystal display device with improved image quality at a high yield.
Further, by performing positioning in a state where the array substrate and the opposing substrate are not in contact with each other via the spacer, highly accurate positioning can be performed, and the image quality can be further improved.

The particles mixed into the second sealing material 80 are not limited to ceramic spheres, but may be glass fibers, silica spheres, alumina powder or the like. Further, the present invention is not limited to the above-described embodiment, and can be variously modified within the scope of the present invention. For example, in the above-described embodiment, the assembling of the liquid crystal display device having the protruding spacers erected on one substrate has been described. However, the present invention relates to the assembling of the liquid crystal display device having the spherical spacers. Is also applicable.

[0059]

As described above in detail, according to the present invention, it is possible to provide a method of assembling a liquid crystal display device capable of assembling a liquid crystal display device with improved image quality at a high yield.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a liquid crystal display device to which an assembling method according to the present invention is applied.

FIG. 2 is a side view schematically showing an example of an assembling apparatus used for performing an assembling method according to the present invention.

FIG. 3 is an exploded perspective view showing an array substrate and a counter substrate of the liquid crystal display device.

FIG. 4 is a view schematically showing an assembling method according to the embodiment of the present invention;

FIG. 5 is an exploded perspective view of a liquid crystal display device showing an applied state of a sealing material in an assembling method according to a second embodiment of the present invention.

FIG. 6 is a view schematically showing an assembling method according to the second embodiment.

[Explanation of symbols]

 Reference Signs List 10 array substrate 12 counter substrate 10a, 12a display area 14 liquid crystal composition 16, 30 glass substrate 20 pixel electrode 26, 40 alignment film 36 spacer 38 counter electrode 42 sealing material 80 second Sealing material 82 ... Particle

Continuing on the front page (72) Inventor Katsunori Indoors 50, Kamiyube, Himeji, Himeji-shi, Hyogo Prefecture Inside the Toshiba Himeji Plant (72) Inventor Honda End 50, Kamiyobe, Yoyo-ku, Himeji-shi, Hyogo Prefecture Himeji Toshiba Corporation Inside the plant (72) Inventor Takaomi Tanaka 50 Uebebe, Himeji-shi, Hyogo Prefecture Inside the Toshiba Himeji Plant Co., Ltd. (72) Inventor Shoichi Kurauchi 8 Shinsugita-cho, Isogo-ku, Yokohama-shi, Kanagawa Pref.

Claims (6)

[Claims] 1. A first substrate provided with electrodes and a second substrate provided with spacers and electrodes are provided, and one of the first and second substrates is provided on one of the substrates. A sealing material is provided so as to surround the display region, and the first and second substrates are opposed to each other through the sealing material so that the first and second substrates face each other in a state where the display region of the first substrate does not contact the spacer. And the second substrate is attached and temporarily sealed, and at least one of the temporarily sealed first and second substrates is moved to align the substrates. After the above alignment is completed, At least one of the substrates is pressurized so that the first and second substrates come into contact with each other via the spacer, and the sealing material is cured to perform the final sealing. 2. The height, width, and viscosity of the sealing material and the voltage applied to the first and second substrates so that the spacer does not contact the display area of the first substrate during the temporary sealing. 2. The method according to claim 1, wherein at least one of the applied pressures is adjusted. 3. A first substrate provided with an electrode and a second substrate provided with an electrode and a spacer having a predetermined height are provided, wherein one of the first and second substrates is provided. A sealing material having a height higher than the spacer is provided on the substrate so as to surround the display region; the first and second substrates are bonded together via the sealing material; So that the display areas of the above face each other at an interval wider than the height of the spacer,
The first and second substrates are opposed to each other, and at least one of the bonded first and second substrates is moved to perform alignment between the substrates. After the alignment is completed, the spacer is removed. A method of assembling a liquid crystal display device, wherein at least one of the substrates is pressed so that the first and second substrates come into contact with each other, and the sealing material is cured. 4. A first substrate provided with an electrode and a second substrate provided with an electrode and a spacer having a predetermined height are provided, and one of the first and second substrates is provided. A first sealant is provided on the substrate so as to surround the display area, and a second sealant, which is higher than the spacer, is provided outside the first sealant. The first substrate is arranged so that the display area of the second substrate is opposed to the display area at a wider interval than the height of the spacer.
And temporarily bonding the second substrate with the second sealant, and moving at least one of the temporarily sealed first and second substrates to align the substrates. After the positioning is completed, at least one of the substrates is pressed so that the first and second substrates come into contact with each other via the spacer, and the first and second substrates are placed via the first sealant. A method of assembling a liquid crystal display device, wherein the liquid crystal display device is bonded and bonded together. 5. The method according to claim 4, wherein the second sealing material includes particles having a diameter larger than the height of the spacer. 6. The method according to claim 4, wherein, after the final sealing, a portion bonded by the second sealing material is cut off.
Or the assembling method of the liquid crystal display device according to 5.