JPH1096906A - Production of liquid crystal display element, producing device of liquid crystal display element and liquid crystal display element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve display characteristics and production yield by laminating a substrate with a hot-melt member and melting and solidifying hot-melt member to adhere a liquid crystal cell to the substrate with the hot-melt member. SOLUTION: A liquid crystal cell is carried by a carrying device 2a and mounted and fixed on a stage 3a. A hot-melt adhesive is applied by a coating device 4a as required on the principal plane of the liquid crystal cell on the stage 3a. Then the liquid crystal cell and a substrate are carried by carrying devices 2b and 2d, and the liquid crystal cell and the substrate are laminated with the hot-melt adhesive on a stage 3c. After the liquid crystal cell and the substrate are judged as in a good state, a stage 3d as a whole is carried to a processing part 11 by a carrying device 2f and the cell and the substrate are adhered by a roll member 9 on the stage 3d. Then the liquid crystal cell adhered with the substrate is carried as on the stage by a carrying device 2g.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a liquid crystal display element used for a liquid crystal display of a personal computer, a simulation device, various kinds of information communication devices represented by a navigation system, and the like, an apparatus for manufacturing a liquid crystal display device, and a liquid crystal device. It relates to a display element.

[0002]

2. Description of the Related Art When an LCD is manufactured, it is essential to attach members such as a polarizing plate, a retardation plate and a reflector to a liquid crystal cell.
This was performed as schematically shown in FIG. That is,
The rubber-based adhesive layer 92 is applied to the surface of the liquid crystal cell 94 while peeling off a protective sheet 93 formed on one main surface of the member 91 and protecting the rubber-based adhesive layer 92 made of natural rubber, synthetic polyisoprene, or the like. The member 91 was adhered to the liquid crystal cell 94 by bringing the member 91 into contact with each other and continuously applying the printing pressure with the roller 95.

[0003]

As described above, when attaching members such as a polarizing plate, a retardation plate and a reflector to a liquid crystal cell, the protective sheet must be peeled off from the surface of these members. When attaching members such as a polarizing plate, a retardation plate and a reflector to a liquid crystal cell, the speed at which the protective sheet is peeled off from these members is changed, the peeling is interrupted, or the peeled protective sheet is used as a member. When they are adhered again, the shape of the adhesive layer formed on one main surface of these members is changed, so that the attachment of these members to the liquid crystal cell becomes uneven and the display quality of the LCD deteriorates. There was a problem of letting it.

Further, when the protective sheet is peeled off from these members, static electricity is generated (peeling charging), and as shown in FIG. 9, foreign substances such as fine particles 96 existing in the surroundings are attracted. When foreign matter such as the fine particles 96 adheres to the adhesive layer, the foreign matter is fixed between the liquid crystal cell and these members, so that bubbles are generated, and the foreign matter is dotted or linear due to light shielding or light scattering. And the quality of the LCD is degraded.

Further, since it is difficult to attach members such as a polarizing plate, a retardation plate and a reflecting plate to a liquid crystal cell while confirming the presence or absence of foreign matter, the presence or absence of foreign matter is determined. This will be confirmed after attaching these members to the liquid crystal cell. In general, when the inclusion of foreign matter is confirmed after attaching these members to the liquid crystal cell,
These members have been peeled off from the liquid crystal cell, and new members have been attached again.However, in recent years, as the size and weight of liquid crystal display elements have decreased, the thickness of the glass substrate constituting the liquid crystal cell has been remarkably reduced. In addition, there has been a problem in that a cell gap is generated due to stress at the time of peeling off members such as a polarizing plate, a retardation plate and a reflecting plate from the liquid crystal cell, and the liquid crystal cell is damaged.

Further, in order to alleviate the stress on the liquid crystal cell which occurs when these members are separated from the liquid crystal cell after the members such as the polarizing plate, the phase difference plate and the reflection plate are attached to the liquid crystal cell. Although a method of dissolving the adhesive layer formed on these members using an organic solvent has been attempted, in this method, the dissolving speed of the adhesive layer is extremely slow, and the dissolving speed is increased to increase the polarization from the liquid crystal cell. When a member such as a plate, a retardation plate and a reflection plate is peeled off, stress acts on the liquid crystal cell, so that there is a problem that a cell gap occurs, the liquid crystal cell is damaged, and at the same time, the liquid crystal cell is dissolved by an organic solvent. There is a problem that the applied adhesive remains on the surface of the liquid crystal cell, and the cell surface needs to be cleaned.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional example, in which a polarizing plate, a retardation plate and a reflector are attached to a liquid crystal cell, and a polarizing plate, a retardation plate and a reflection plate are attached to the liquid crystal cell. The separation of a member such as a plate from the liquid crystal cell is represented by L
An object of the present invention is to provide a liquid crystal display element manufacturing method and a liquid crystal display element manufacturing apparatus that can be easily executed without deteriorating the display quality of a CD or causing a product defect.

Further, the present invention provides a liquid crystal display element having excellent display characteristics and good production yield, in which members such as a polarizing plate, a retardation plate and a reflecting plate are adhered to a liquid crystal cell by a heating type melting member. The purpose is to provide.

[0009]

According to a method of manufacturing a liquid crystal display device according to the present invention, a substrate is laminated on a main surface of a liquid crystal cell having a liquid crystal sandwiched between two substrates via a heat melting type member. A step of melting the heat melting type member, and a step of solidifying the melted heat melting type member, and bonding the liquid crystal cell and the substrate with the heat melting type member. I have.

In the present invention, the use of the heat melting type member allows the substrate and the liquid crystal cell to be aligned at a stage where the adhesiveness does not occur, thereby enabling accurate alignment. Furthermore, since the heat melting type member is melted by heating even after bonding, when a defect occurs, the substrate and the liquid crystal cell can be easily separated and reused without damaging the substrate and the liquid crystal cell.
Another method for manufacturing a liquid crystal display element according to the present invention is a method for manufacturing a liquid crystal display device, comprising the steps of:
Laminating a first substrate via the heat melting mold member, melting the first heat melting mold member at a first temperature, and heating the first substrate melted at the first temperature. A step of solidifying the melting mold member and bonding the liquid crystal cell and the first substrate with the heating melting member, and on a main surface of the first substrate via a second heating melting member; Laminating a second substrate;
Melting at the second temperature, and solidifying the second heat-melting member melted at the second temperature, and bonding the first substrate and the second substrate by the heat-melting member. Are provided.

When a plurality of substrates are attached to a liquid crystal cell as in the present invention, the order in which the substrates are attached to the liquid crystal cell is as follows.
A plurality of heat melting type members are selected and used so that the melting temperature of the heat melting type member used for attaching the substrate becomes low. By selecting and using a plurality of heat melting type members as described above, even when the substrate is attached to the liquid crystal cell over a plurality of times, the attachment of the substrate to the liquid crystal cell becomes reliable. In the unlikely event that it is necessary to peel the substrate from the liquid crystal cell, by regulating the temperature, without peeling the substrate previously adhered to the liquid crystal cell, only the substrate currently adhered to the liquid crystal cell can be used. It becomes possible to peel off selectively. In addition, even when a plurality of substrates are attached to the liquid crystal cell, the temperature at which each heat melting type member is melted is a temperature higher than the liquid crystal-isotropic transition temperature of the liquid crystal sealed inside the liquid crystal cell. As described above, it is preferable to select each heat melting type member.

Further, the manufacturing apparatus for a liquid crystal display element according to the present invention includes a substrate having a heat melting type member on the main surface on a main surface of a liquid crystal cell having liquid crystal interposed between the substrates. Laminating means for laminating so that the heat-melting type member provided in contact with the main surface of the liquid crystal cell, and a substrate laminated on the main surface of the liquid crystal cell by the laminating means, Arranging means for arranging the liquid crystal cell at a fixed position, first judging means for judging a state of the substrate and the liquid crystal cell arranged at a fixed position on the main surface of the liquid crystal cell by the arranging means, and the first judging means When it is determined that the substrate and the liquid crystal cell are in a desired state, a bonding unit that bonds the substrate and the liquid crystal cell with the heat melting type member, and the liquid crystal bonded by the bonding unit Cell and the substrate It is characterized by comprising a second determination means for determining a state.

According to another aspect of the present invention, there is provided an apparatus for manufacturing a liquid crystal display element, comprising: an attaching means for attaching a heat melting type member on a main surface of a liquid crystal cell having a liquid crystal sandwiched between substrates; Means for laminating a substrate on the main surface of the liquid crystal cell to which the heat melting type member is attached by means, and a substrate laminated on the main surface of the liquid crystal cell by the laminating means. Arranging means for arranging the liquid crystal cell on the main surface of the liquid crystal cell, and arranging means for arranging the liquid crystal cell on the main surface of the liquid crystal cell by the arranging means; When the determination unit determines that the substrate and the liquid crystal cell are in a desired state, the bonding unit bonds the substrate and the liquid crystal cell with the heat-melting member, and the bonding unit bonds the substrate and the liquid crystal cell. The liquid crystal cell and the substrate It is characterized in that state and a second determination means for determining the. As mentioned above,
In the liquid crystal display device of the present invention, since the heat melting type member is used, it is possible to determine the displacement of the position between the liquid crystal cell and the substrate at a stage where the adhesiveness does not occur, and it is determined that the liquid crystal cell and the substrate are arranged at the predetermined position and the liquid crystal cell is bonded. Will be.

In the present invention, the judging means for judging the state of the liquid crystal cell and the substrate disposed at a predetermined position on the liquid crystal cell includes a position-related state of the liquid crystal cell and the substrate, that is, the liquid crystal cell, the substrate, Appropriately judge defects such as scratches and cracks in the mold member, contamination of the liquid crystal cell, substrate and heat-melted mold member by the mixed fine particles, and presence of foreign matter such as dust trapped between the liquid crystal cell and the substrate. There is no particular limitation as long as it does. As such a determination means, for example, by optically observing the liquid crystal cell, the substrate and the heat melting type member, and comparing the observation result with a reference set in advance in the storage device, the liquid crystal cell and the substrate Means for judging whether or not is in a desired state.

Further, in the present invention, when it is determined that the liquid crystal cell and the substrate are in a desired state, the bonding means for bonding the liquid crystal cell and the substrate includes a liquid crystal cell and a substrate. The type is limited as long as it has a mechanism that heats and melts the heat melting mold member, solidifies the melted heat melting member, and bonds the liquid crystal cell and the substrate via the heat melting mold member. It is not something to be done.
As such bonding means, for example, a heating roll whose surface has been heated to a predetermined temperature is brought into contact with the substrate, and the entire surface of the substrate is scanned to melt the heat melting mold member, and then the surface is heated to the predetermined temperature. Bring the cooled cooling roll into contact with the substrate,
Means for scanning the entire surface of the substrate to solidify the heat-meltable member can be given. At this time, as described above, the surface temperature of the heating roll is appropriately determined according to the applied heat-melting mold member.

Further, the liquid crystal display device according to the present invention has the following features.
A liquid crystal cell having a liquid crystal sandwiched between two substrates, and a substrate adhered on a main surface of the liquid crystal cell by a heat melting type member.

In the present invention, the liquid crystal cell is not limited as long as it is a cell used for a liquid crystal display having a configuration in which a liquid crystal material is sandwiched between two substrates made of glass or the like. TN by matrix method
And STN type liquid crystal cells, and TFD or TFT type liquid crystal cells using an active matrix system.

In the present invention, the substrate is not limited as long as it is a member that is attached to a liquid crystal cell and constitutes a liquid crystal display. Examples of such a member include a polarizing plate, a retardation plate, and a reflection plate. And a viewing angle improving film or a laminated film obtained by arbitrarily laminating these films.

Further, in the present invention, the main surface of the liquid crystal cell refers to the surface of each substrate constituting the liquid crystal cell which faces the surface holding the liquid crystal, and the main surface of the substrate means the maximum surface area. And any one of a pair of a surface having a surface and a surface facing the surface.

Further, in the present invention, the heat melting type member is a general term for a substance which melts by heating and exhibits an adhesive ability when solidified by cooling or the like.
As such a heat melting type member, a thermoplastic resin such as EVA (ethylene vinyl acetate copolymer) or EEA
Hot-melt adhesives containing (ethylene ethyl acrylate polymer) as a main component are exemplified. Hot-melt adhesives are generally non-tack, so even if foreign matter such as fine particles adheres to the adhesive layer made of the hot-melt adhesive, the foreign matter can be easily removed from the adhesive layer. Further, even if the adhesive layer is somewhat uneven, the adhesive layer is melted at the time of bonding, so that a uniform bonded surface can be obtained. Further, since the hot-melt type adhesive is melted again by heating, for example, the polarizing plate adhered to the liquid crystal cell can be easily peeled off from the liquid crystal cell. Therefore, in the present invention, it is preferable to use a hot-melt adhesive as the heat-melting member.

In the present invention, the liquid crystal cell and the substrate are adhered to each other by using a heat melting type member. At this time, it is necessary to heat the heat melting type member in order to melt the heat melting type member. . Therefore, a suitable material is selected for the heat-melting member under the condition that the liquid crystal cell and the substrate to be attached to the liquid crystal cell are melted at a temperature at which the member is not damaged. The temperature condition allowed when melting the heat melting mold member is usually up to about 130 ° C., so the heat melting mold member capable of melting below this temperature, particularly the hot melt mold described above. Is suitably used as a heat melting type member. Further, it is more preferable that the temperature at which the heat melting type member is melted is higher than the liquid crystal-isotropic transition temperature of the liquid crystal sealed in the liquid crystal cell. This is because when a defect such as an alignment defect is found, the liquid crystal cell is heated to a temperature several to several tens of degrees Celsius higher than the NI point to bring the liquid crystal cell into an isotropic state, and then may be cooled (annealed). This is to prevent the heat melting type member from melting and softening in the annealing step and peeling off from the liquid crystal cell. When the temperature at which the heat melting type member is melted is set to a temperature higher than the liquid crystal-isotropic transition temperature of the liquid crystal sealed in the liquid crystal cell, the orientation of the liquid crystal is usually adjusted again. Then, annealing is performed at a temperature about 10 to 20 ° C. higher than the NI point.

In the present invention, in the case where it becomes necessary to peel the substrate from the liquid crystal cell, a peeling means for peeling off the bonded liquid crystal cell and the substrate by re-melting the heat melting type member. Can be further provided. As a peeling means for peeling the adhered liquid crystal cell and the substrate, for example, while re-melting the heat melting type member using the heating roll, a spatula member such as a scraper between the liquid crystal cell and the substrate. Means for inserting and peeling the substrate from the liquid crystal cell can be given. In the present invention, the provision of the above-described peeling means makes it possible to selectively peel off the substrate attached to the liquid crystal cell.

[0023]

An embodiment of the present invention will be described below with reference to the drawings. In the drawings, those having the same functions are denoted by the same reference numerals,
Detailed description for each drawing is omitted.

FIG. 1 is a diagram schematically showing the configuration of a liquid crystal display element manufacturing apparatus according to the present invention.

In FIG. 1, an apparatus 1 for manufacturing a liquid crystal display element is shown.
Are transporting devices 2a to 2h for transferring the liquid crystal cell and the substrate from the previous stage to the subsequent stage, stages 3a to 3d for mounting and fixing the liquid crystal cell and the substrate, and heating of a hot melt adhesive or the like on the main surface of the liquid crystal cell or the substrate. Coating devices 4a and 4b for applying a molten mold member, CCD cameras 6a and 6b for optically observing liquid crystal cells and substrates on stage 3d under monitor 5a, and positioning for positioning liquid crystal cells and substrates. An arrangement unit 8 including the device 7;
A processing unit 11 for bonding the liquid crystal cell and the substrate on the stage 3d using the roll member 9, and the liquid crystal cell and the substrate on the stage 3d are optically monitored by the CCD cameras 6c and 6d under the monitoring of the monitor 5b. The inspection unit 12 having the peeling means 10 for peeling the liquid crystal cell and the substrate as necessary, while confirming the presence or absence of a defect by observation, and the transport devices 2a to 2
h, a motor controller 13 for controlling the operation of the positioning device 7, an illuminance monitor 14 for inputting monitor results such as illuminance information from the monitors 5a and 5b, and CCD cameras 6a to 6d.
And an image processing unit 15 for processing an image from
These are centrally controlled by the host computer 16 with an organic connection.

Next, the operation of the apparatus 1 for manufacturing a liquid crystal display element schematically shown in FIG. 1 will be described.

First, the liquid crystal cells are transferred from the former stage by the transfer device 2a, and are mounted and fixed on the stage 3a, and the coating device 4a is placed on the main surface of the liquid crystal cell on the stage 3a as required. Thereby applying a hot melt adhesive. On the other hand, a substrate such as a polarizing plate is transferred by the transfer device 2c from the previous stage, and placed on the stage 3b.
At the same time, the hot melt adhesive is applied to the main surface of the substrate on the stage 3b by the application device 4b as needed. The application of the hot melt adhesive by the application devices 4a and 4b may be omitted as long as it is applied to at least one of the liquid crystal cell and the substrate. Next, the liquid crystal cell and the substrate are transferred by the transfer devices 2b and 2d, and the liquid crystal cell and the substrate are stacked on the stage 3c via a hot melt adhesive. Next, the liquid crystal cell and the substrate transferred onto the stage 3d by the transfer device 2e are combined with the CCD cameras 6a and 6d.
The stage 3d is placed in a predetermined positional relationship by the positioning device based on the image from b, the state is determined by the host computer, and if the state between the liquid crystal cell and the substrate is determined to be good, the stage 3d is moved to the transfer device. The whole stage is transferred to the processing section 11 by 2f, and is adhered by the roll member 9 on the stage 3d. Lastly, the bonded liquid crystal cell and the substrate are transferred together with the stage by the transfer device 2g, and the CCD cameras 6c and 6c are moved on the stage 3d.
Inspection is performed based on the image from d, and transported to the subsequent stage by the transport device 2h. In addition, those which are determined to be defective in the inspection are subjected to a peeling process and then re-input.

The embodiments described below were carried out using the apparatus for manufacturing a liquid crystal display device having such a configuration.

Example 1 First, a substrate (array substrate) in which a display electrode, a driving element, and an electrode for supplying power to the driving element were formed on one main surface of a glass substrate having a thickness of 1.1 t;
A substrate (CF substrate) having a color placement layer and a display electrode formed on one principal surface of a glass substrate having a thickness of t is subjected to an orientation treatment, and a spherical gap agent for adjusting a gap between the substrates is sprayed to form a bag. After bonding the two substrates with the applied adhesive, a liquid crystal composition (E. Merck Co., Ltd .: ZLI) was opened through the opening of the bag.
-1132, NI point 71 ° C) and torsion component (E. Mer
ck, Inc .: S-811), and the mixture was injected and sealed to obtain a 16-inch diagonal liquid crystal cell 21.

On the other hand, a polarizing plate 22 (Nitto Denko Corporation: N
PF-G5220DUN; FIG. 2a), a hot-melt adhesive (Siden Chemical Co., Ltd .: Sibinol HM-）-20) is spray-coated by melt hot-melt pressure feeding so that the thickness of the adhesive layer becomes 25 μm. An adhesive layer 23 is formed (FIG. 2b), and a protective sheet 24, which is slightly larger than the polarizing plate and has tackiness, is attached to the surface on which the adhesive layer is not formed. A plate 25 was obtained (FIG. 2c).

Next, a glued polarizing plate 2 with a protective sheet
5 is arranged on the liquid crystal cell 21 whose surface has been cleaned, and the liquid crystal cell 21 and the polarizing plate 25 with glue are adjusted in the arrangement section 8 so as to have a desired positional relationship, and then the tackiness of the protective sheet 24 is used. The glued polarizing plate 25 was fixed to the stage 3d (FIG. 2D). Then, based on images from the CCD cameras 6a and 6b, it is confirmed that the liquid crystal cell 21 and the polarizing plate 25 are free from scratches, cracks, contamination by fine particles, etc., and then the rubber roller member 9 heated to 130 ° C.
Is pressed onto the glued polarizing plate 25 from above the protective sheet 24, the hot melt adhesive is melted, and the polarizing plate 22 is pressure-bonded to the liquid crystal cell 21, and the glued polarizing plate is cooled by a cooled rubber roller member. 25 and the liquid crystal cell 21 (FIG. 2)
(E)). Next, the liquid crystal cell 21 with the polarizing plate 22 adhered thereto
Is inspected based on the images from the CCD cameras 6c and 6d, and that the polarizing plate 22 is stuck to a desired position of the liquid crystal cell 21, that the surface of the polarizing plate 22 is free from scratches, etc. It was confirmed that there were no bubbles or foreign matter between the polarizing plate 22 and the like (FIG. 2F). Then, these series of operations were performed on both surfaces of the liquid crystal cell 21 to obtain a liquid crystal display element 31 schematically shown in FIG.

When a driving circuit was connected to the liquid crystal display element 31 and actual driving was performed, no defect due to the attachment of the polarizing plate 22 to the liquid crystal cell 21 was recognized, and a favorable display state was obtained. Further, the liquid crystal display element 31 was annealed to re-orient the liquid crystal composition sealed in the liquid crystal display element 31, but the annealing temperature can be set lower than the bonding execution temperature. Peeling and displacement of the polarizing plate 22 from the cell 21 were not observed. Further, immediately before attaching the polarizing plate 22 to the liquid crystal cell 21, an inspection of the liquid crystal cell 21 and the polarizing plate 22 for foreign substances can be performed, and an adhesive layer can be used for attaching the polarizing plate 22 to the liquid crystal cell 21. It is not necessary to peel off the protective sheet for the protection of the liquid crystal, and since the peeling charge is not induced by the protective sheet, the intrusion of foreign matter when the polarizing plate 22 is adhered to the liquid crystal cell 21 can be greatly reduced. Therefore, according to the present embodiment, the production yield of the liquid crystal display element could be greatly improved.

(Example 2) First, a liquid crystal cell 21 having a diagonal width of 16 inches was obtained in the same manner as in Example 1. Then
After mounting and fixing the liquid crystal cell 21 on the stage 3a and cleaning the surface of the liquid crystal cell 21, the thickness of the adhesive layer is 25 μm.
Thus, the same hot melt adhesive as in Example 1 was spray-coated on the surface of the liquid crystal cell 21 by melt hot melt pressure feeding to form a hot melt adhesive layer 23 on the surface of the liquid crystal cell 21 ( FIG. 4 (a). On the other hand, a polarizing plate 41 with a protective sheet was obtained in the same manner as in Example 1 except that the hot melt adhesive layer 23 was not formed (FIGS. 4B and 4C). Next, the polarizing plate 41 with a protective sheet is arranged on the liquid crystal cell 21 whose surface has been cleaned, and the liquid crystal cell 21 and the glued polarizing plate 25 are adjusted in the arrangement section 8 so as to have a desired positional relationship. Using the tackiness of No. 24, the glued polarizing plate 25 was fixed to the stage 3d (FIG. 4D). Then, based on the images from the CCD cameras 6a and 6b, the liquid crystal cell 21
After confirming that the polarizing plate 41 with the protective sheet is free from scratches, cracks, and contamination by fine particles, the rubber roller member 9 heated to 130 ° C. is pressed from above the protective sheet 24 onto the polarizing plate 41 with the protective sheet. Then, the hot melt adhesive is melted and the polarizing plate 22 is pressure-bonded onto the liquid crystal cell 21,
The polarizing plate 41 with the protective sheet and the liquid crystal cell 21 were cooled by the cooled rubber roller member (FIG. 4E). Next, the liquid crystal cell 21 to which the polarizing plate 22 is adhered is inspected based on the images from the CCD cameras 6c and 6d, and it is confirmed that the polarizing plate 22 is stuck at a desired position of the liquid crystal cell 21. It was confirmed that there were no scratches or the like on the surface, and that there were no bubbles or foreign matter between the liquid crystal cell 21 and the polarizing plate 22 (FIG. 4 (f)). Then, these series of operations were performed on both surfaces of the liquid crystal cell 21 to obtain a liquid crystal display element 31 schematically shown in FIG.

When a driving circuit was connected to the liquid crystal display element 31 and actual driving was performed, no defect due to the attachment of the polarizing plate 22 to the liquid crystal cell 21 was observed, and a favorable display state was obtained. Further, the liquid crystal display element 31 was annealed to re-orient the liquid crystal composition sealed in the liquid crystal display element 31, but the annealing temperature can be set lower than the bonding execution temperature. Peeling and displacement of the polarizing plate 22 from the cell 21 were not observed. Further, immediately before attaching the polarizing plate 22 to the liquid crystal cell 21, an inspection of the liquid crystal cell 21 and the polarizing plate 22 for foreign substances can be performed, and an adhesive layer can be used for attaching the polarizing plate 22 to the liquid crystal cell 21. It is not necessary to peel off the protective sheet for the protection of the liquid crystal, and since the peeling charge is not induced by the protective sheet, the intrusion of foreign matter when the polarizing plate 22 is adhered to the liquid crystal cell 21 can be greatly reduced. Therefore, according to the present embodiment, the production yield of the liquid crystal display element could be greatly improved.

(Embodiment 3) According to the present invention, a plurality of substrates can be attached to a liquid crystal cell. In this case, the heating and melting used for attaching the substrates in the order of attaching the substrates to the liquid crystal cell. A plurality of heat melting mold members are selected so that the temperature at which the mold members melt becomes low, and the temperature of the heating roll is adjusted according to the melting temperature of each heat melting mold member. in this way,
By selecting a plurality of heat melting mold members and adjusting the temperature of the heating roll in accordance with the melting temperature of each heat melting mold member, a plurality of substrates can be attached to the liquid crystal cell, and The substrate can be securely attached.

In this embodiment, in the apparatus for manufacturing a liquid crystal display element shown in FIG. 1, the attachment of the substrate to the liquid crystal cell was repeated, and two kinds of substrates were attached to the liquid crystal cell.

First, in the same manner as in the first embodiment,
A 6-inch liquid crystal cell 21 was obtained. Further, in the same manner as in Example 2, a polarizing plate 41 with a protective sheet and a viewing angle improving film 53 with a protective sheet were obtained (FIGS. 5A to 5).
(D)). Next, after mounting and fixing the liquid crystal cell 21 on the stage 3a and cleaning the surface of the liquid crystal cell 21, the same hot melt adhesive as in Example 1 is applied so that the thickness of the adhesive layer becomes 25 μm. The surface of the liquid crystal cell 21 is spray-coated by melt hot melt pressure feeding,
The hot melt adhesive layer 23 was formed on the surface of FIG.
(E)).

Next, the viewing angle improving film 53 with the protective sheet is placed on the liquid crystal cell 21 whose surface has been cleaned, and the liquid crystal cell 21 and the viewing angle improving film 53 with the protective sheet are arranged in the arrangement portion 8 in a desired positional relationship. After the adjustment, the viewing angle improving film 53 with the protective sheet was fixed to the stage 3d using the tackiness of the protective sheet 52 (FIG. 5F). Then, based on the images from the CCD cameras 6a and 6b, it is confirmed that the liquid crystal cell 21 and the viewing angle improving film 53 with the protective sheet are free from scratches, cracks, and contamination by fine particles. The member 9 is pressed from above the protective sheet 52 onto the viewing angle improving film 53 with the protective sheet, the hot melt adhesive is melted, and the polarizing plate 22 is pressure-bonded onto the liquid crystal cell 21 and cooled with a rubber roller member. The viewing angle improving film 53 with a protective sheet and the liquid crystal cell 21 were cooled (FIG. 5).
(G)). Next, the liquid crystal cell 21 to which the viewing angle improving film 51 is adhered is inspected based on the images from the CCD cameras 6c and 6d, and that the viewing angle improving film 51 is attached to a desired position of the liquid crystal cell 21, It was confirmed that there was no scratch on the surface of the film 51, and that there was no bubble or foreign matter between the liquid crystal cell 21 and the viewing angle improving film 51 (FIG. 5 (h)).

Next, the protective sheet 52 is peeled off from the viewing angle improving film 51, and the hot melt adhesive having a lower melting point than the hot melt adhesive of Example 1 (so that the thickness of the adhesive layer becomes 25 μm) ( Three Bond Co., Ltd .: Three Bond 1601, a working temperature of 120 ° C.) was spray-coated on the surface of the viewing angle improving film 51 by melting hot melt pressure feeding to form a hot melt adhesive layer 54 on the surface of the viewing angle improving film 51 (FIG. 5 (i)). Then
After arranging the polarizing plate 41 with the protective sheet on the viewing angle improving film 51 and adjusting the liquid crystal cell 21 and the polarizing plate 41 with the protective sheet in the arranging section 8 to have a desired positional relationship, the tackiness of the protective sheet 24 is adjusted. Is used to fix the polarizing plate 41 with a protective sheet to the stage 3d (FIG. 5).
(J)). Then, based on images from the CCD cameras 6a and 6b, it was confirmed that the liquid crystal cell 21, the viewing angle improving film 51, and the polarizing plate 41 with a protective sheet were free from scratches, cracks, and contamination by fine particles, and then heated to 120 ° C. The rubber roller member 9 is pressed from above the protective sheet 24 onto the polarizing plate 41 with the protective sheet, the hot melt adhesive is melted, and the polarizing plate 22 is pressure-bonded onto the viewing angle improving film 51 of the liquid crystal cell 21 and cooled. The polarizing plate 41 with a protective sheet, the viewing angle improving film 51, and the liquid crystal cell 21 were cooled by the rubber roller member (FIG. 5 (k)). next,
The liquid crystal cell 21 to which the polarizing plate 22 and the viewing angle improving film 51 are adhered is inspected based on the images from the CCD cameras 6c and 6d.
That the surface of the polarizing plate 22 has no scratches, etc., and that the polarizing plate 22 and the viewing angle improving film 5
It was confirmed that there were no bubbles or foreign matter between the first and second samples (see FIG. 5).
(L)). Then, these series of operations were performed on both surfaces of the liquid crystal cell 21 to obtain a liquid crystal display element 61 schematically shown in FIG.

The obtained liquid crystal display element 61 is a liquid crystal cell 2
Regardless of the fact that the substrate was bonded twice for one main surface, all substrates were normally bonded. And
When a driving circuit was connected to the liquid crystal display element 61 and actual driving was performed, no defect due to the attachment of the polarizing plate 22 and the viewing angle improving film 51 to the liquid crystal cell 21 was observed, and a favorable display state was obtained. Further, the liquid crystal display element 31 was annealed to re-orient the liquid crystal composition sealed in the liquid crystal display element 31, but the annealing temperature can be set lower than the bonding execution temperature. Cell 2
No peeling or displacement of the polarizing plate 22 and the viewing angle improving film 51 from No. 1 was observed. Further, immediately before attaching the polarizing plate 22 and the viewing angle improving film 51 to the liquid crystal cell 21, an inspection of the liquid crystal cell 21, the polarizing plate 22, and the viewing angle improving film 51 for foreign substances can be performed.
In addition, when the polarizing plate 22 and the viewing angle improving film 51 are attached to the liquid crystal cell 21, there is no need to remove the protective sheet for protecting the adhesive layer, and the protective sheet does not induce separation electrification. Foreign matter at the time of attaching the polarizing plate 22 and the viewing angle improving film 51 was significantly reduced. Therefore, according to the present embodiment, the production yield of the liquid crystal display element could be greatly improved.

Example 4 First, a substrate (opposite substrate) having a strip-shaped display electrode formed on one principal surface of a 0.7 t-thick glass substrate, and a color plate placed on one principal surface of a 0.7 t-thick glass substrate An orientation process is performed on the layer and the substrate (CF substrate) on which the strip-shaped display electrodes are formed, a spherical gap agent for adjusting the gap between the substrates is sprayed, and the two substrates are coated with a bag-shaped adhesive. After bonding, the liquid crystal composition (E. Me
rck Co., Ltd .: ZLI-2293, NI point 85 ° C.) and a torsion component (E. Merck Co., Ltd .: S-811) were injected and sealed, and a diagonal 13-inch 240 was injected.
A liquid crystal cell 71 having a degree of twist was obtained. On the other hand, the thickness of the adhesive layer was 25 μm on the polarizing plate 22 of FIG.
Hot melt adhesive (Syden Chemical Co., Ltd .: Sibinol HM-II-20) is spray-applied by molten hot melt pressure feeding so that the hot melt adhesive layer 2
7 (FIG. 7 (b)), and a protective sheet 24, which is slightly larger than the polarizing plate and has tackiness, is attached to the surface on which the glue layer is not formed. A plate 25 was obtained (FIG. 7 (c)).

Next, a polycarbonate retardation plate 71 having a predetermined retardation is attached so that the stretching direction of the polarizing plate 22 and the stretching direction of the retardation plate 71 are at a predetermined angle, thereby obtaining an elliptically polarizing plate 72 ( FIG. 7D). further,
A hot melt adhesive having a lower application temperature than that of Cybinol HM-Ρ-20, Three Bond 1601, is spray-coated on the retardation plate 71 by melt hot melt pressure feeding so that the thickness of the adhesive layer becomes 25 μm. Thus, an elliptically polarizing plate 74 with a hot melt adhesive layer 73 was obtained (FIG. 7).
(E)).

Next, the heating temperature of the roller member 9 is set to 120 ° C.
A liquid crystal display device was obtained in exactly the same manner as in Example 1 except that the above conditions were adopted.

When a driving circuit was connected to the thus obtained liquid crystal display device and actual driving was performed, no defect due to the attachment of the elliptically polarizing plate 74 to the liquid crystal cell 21 was recognized, and a favorable display state was obtained. Was. Further, the liquid crystal display element 31 was annealed to re-orient the liquid crystal composition sealed in the liquid crystal display element 31, but the annealing temperature can be set lower than the bonding execution temperature. No peeling or displacement of the elliptically polarizing plate 74 from the cell 21 was observed, and the adhesion between the polarizing plate 22 constituting the elliptically polarizing plate 73 and the polycarbonate retardation plate 71 was also good. Further, immediately before attaching the elliptically polarizing plate 74 to the liquid crystal cell 21, it is possible to perform an inspection of the liquid crystal cell 21 and the elliptically polarizing plate 74 for contamination of foreign substances and the like, and to attach the elliptically polarizing plate 73 to the liquid crystal cell 21. Since the protective sheet for protecting the adhesive layer does not need to be peeled off, and the protective sheet does not induce peeling charge, it is possible to greatly reduce the intrusion of foreign matter when the elliptically polarizing plate 74 is attached to the liquid crystal cell 21. did it.

Therefore, according to the present embodiment, the production yield of the liquid crystal display element could be greatly improved.

(Example 5) In exactly the same manner as in Example 4,
A 13-inch diagonal liquid crystal display device with an elliptically polarizing plate was obtained.
Next, after placing and holding the liquid crystal display element on the stage 3d,
The liquid crystal display element is heated to the application temperature of the hot melt adhesive by the hot air heating mechanism provided in the peeling means 11 to melt the hot melt adhesive layer 73, and the elliptically polarizing plate is melted under the melting of the hot melt adhesive layer 73. A metallic scraper 81 is inserted into the gap between the liquid crystal cell 74 and the liquid crystal cell 21 (FIG. 8A),
The elliptically polarizing plate 74 was peeled off from the liquid crystal cell 21 (FIG. 8).
(B)). Here, the surface of the liquid crystal cell 21 from which the elliptically polarizing plate 74 was peeled was cleaned by a cleaning mechanism provided in the peeling means 11 and dried again. Next, the elliptically polarizing plate 74 was pasted again on the liquid crystal cell 21 in the same manner as in Example 4, and a liquid crystal display element was obtained again (FIG. 8C).

When a driving circuit was connected to the thus obtained liquid crystal display device and actual driving was performed, the elliptically polarizing plate 74 was separated from the liquid crystal cell 21 and the elliptically polarizing plate 7 was removed from the liquid crystal cell 21.
No defect caused by re-sticking of No. 4 was observed, and a good display state was obtained. In order to re-orient the liquid crystal composition sealed in the liquid crystal display element 31, the liquid crystal display element 31
Was performed, but since the annealing temperature can be set lower than the bonding temperature, peeling and displacement of the elliptically polarizing plate 74 from the liquid crystal cell 21 are not observed.
The adhesion between the polarizing plate 22 constituting the elliptically polarizing plate 73 and the polycarbonate retardation plate 71 was also good. Further, immediately before attaching the elliptically polarizing plate 74 to the liquid crystal cell 21,
Inspection of foreign matter into the elliptically polarizing plate 74 can be performed, and the elliptically polarizing plate 73
It is not necessary to peel off the protective sheet for protecting the adhesive layer at the time of sticking, and since the peeling charge is not induced by the protective sheet, contamination of foreign matter when the elliptically polarizing plate 74 is stuck to the liquid crystal cell 21 is greatly reduced. I was able to.

In this embodiment, the liquid crystal cell 21
Since the elliptically polarizing plate 74 is peeled from the liquid crystal cell 21 by melting the hot melt adhesive without using an organic solvent or the like when the elliptically polarizing plate 74 is peeled off, the stress on the liquid crystal cell in the peeling step is substantially reduced. Suppressed, no defective liquid crystal cell gap and no cell damage due to stress were observed.

Therefore, according to the present embodiment, the production yield of the liquid crystal display element could be greatly improved.

Example 6 A reflective liquid crystal display device was obtained in the same manner as in Example 2, except that the hot melt adhesive was changed to Three Bond 1601 and a reflector was used as the substrate. .

When a driving circuit was connected to the reflection type liquid crystal display element and actual driving was performed, no defect due to the attachment of the reflection plate to the liquid crystal cell 21 was recognized, and a favorable display state was obtained. Also, in order to re-orient the liquid crystal composition enclosed in the reflective liquid crystal display element, annealing was performed on the reflective liquid crystal display element, but the annealing temperature can be set lower than the bonding temperature. No peeling or displacement of the reflection plate from the liquid crystal cell 21 was observed. Further, immediately before attaching the reflection plate to the liquid crystal cell 21,
In addition, it is possible to perform an inspection for contamination of the reflection plate with a foreign substance, and it is not necessary to peel off the protection sheet for protecting the adhesive layer when attaching the reflection plate to the liquid crystal cell 21. As a result, contamination of the liquid crystal cell 21 with foreign substances when the reflection plate is attached to the liquid crystal cell 21 was significantly reduced.

Therefore, according to the present embodiment, the production yield of the reflection type liquid crystal display device could be greatly improved.

(Comparative Example 1) A polarizing plate equivalent to that of Example 1 (Nitto Denko Corporation: NPF-G1) in which the liquid crystal cell obtained in Example 1 was provided with a sealant and a protective sheet in advance.
220 DUN) was attached to a predetermined position of a liquid crystal cell using a roller pressure bonding type polarizing plate applying apparatus to obtain a liquid crystal display element.

When a driving circuit was connected to the thus obtained liquid crystal display device and actual driving was performed, it was found that separation between the liquid crystal cell and the polarizing plate was caused by peeling charging that occurred when the protective sheet was peeled from the polarizing plate. Presumed foreign matters such as fine particles were mixed in, and good display characteristics could not be obtained.

(Comparative Example 2) An elliptically polarizing plate with a glue provided with a sealing agent and a protective sheet in advance was applied to the liquid crystal cell obtained in Example 4 using a roller pressure bonding type polarizing plate sticking apparatus. A liquid crystal display device was obtained by sticking at the position.
Next, the elliptically polarizing plate was gently peeled off from the liquid crystal display element by hand, but since the substrate constituting the liquid crystal cell was thin and the cell size of the liquid crystal cell was large, the elliptically polarizing plate was peeled off from the liquid crystal display element. The liquid crystal cell was damaged halfway.

(Comparative Example 3) An elliptically polarizing plate with a glue provided with a sealant and a protective sheet in advance was applied to the liquid crystal cell obtained in Example 4 by using a roller pressure bonding type polarizing plate sticking apparatus. A liquid crystal display device was obtained by sticking at the position.
Next, alcohol, which is a solvent for the sealing agent previously applied to the elliptically polarizing plate, was dropped onto the elliptically polarizing plate, and the elliptically polarizing plate was separated from the liquid crystal display element while dissolving the sealing agent.
Next, the surface of the liquid crystal cell is cleaned, and an elliptically polarizing plate with a glue provided with a sealant and a protective sheet in advance is pasted again at a predetermined position of the liquid crystal cell using a roller pressure bonding type polarizing plate applying device. A liquid crystal display element was obtained again.

When a driving circuit was connected to the thus obtained liquid crystal display element and actual driving was performed, the liquid crystal display device was charged between the liquid crystal cell and the elliptically polarizing plate due to the separation charge generated when the protective sheet was separated from the elliptically polarizing plate. Foreign matter such as fine particles presumed to be caused was mixed in, and good display characteristics could not be obtained.

Further, in the step of peeling the elliptically polarizing plate from the liquid crystal display element, the liquid crystal is presumed to have been generated due to an imbalance between the dissolution rate of the sealant and the peeling rate of the elliptically polarizing plate from the liquid crystal display element. Cell gap failure occurred due to stress on the cell.

In the present invention, the method of solidifying the melted heat-fusible member is not particularly limited, for example, the cooling member may be directly contacted from above the substrate, and the liquid crystal cell and the substrate may be solidified. In order to surely adhere to the predetermined position, it is preferable to cool as quickly as possible and to solidify the melted heat-fused mold member.

Further, as a method of applying a heat melting type member on the main surface of the liquid crystal cell or the substrate, the heat melting type member is applied onto the main surface of the liquid crystal cell or the substrate by a spraying method by melt hot melt pressure feeding. The method is not particularly limited as long as the method is such that the heat-meltable member is securely adhered to the main surface of the liquid crystal cell or the substrate, such as a method of applying by a printing method. Dissolve the molten mold member in a suitable solvent etc. to give fluidity,
Means for applying a heat melting type member on the main surface of the liquid crystal cell or the substrate by a spray gun, a printing roll, or the like can be given. Further, in the present invention, the type of laminating means for laminating the liquid crystal cell and the substrate is not limited as long as it has a mechanism capable of laminating the liquid crystal cell and the substrate, For example, means for transferring a substrate by a transfer robot onto the main surface of a liquid crystal cell fixed on a stage can be used.

Further, in the present invention, as the arranging means for arranging the substrate laminated on the liquid crystal cell so as to maintain a predetermined positional relationship with respect to the liquid crystal cell, the substrate laminated on the liquid crystal cell may be arranged with respect to the liquid crystal cell. The type is not limited as long as it has a mechanism that can be arranged at a predetermined position.For example, while optically observing a liquid crystal cell and a substrate laminated on the liquid crystal cell, Means for arranging the substrate by a positioning robot at a preset position on the cell can be used.

[0062]

As described above in detail, according to the method of manufacturing a liquid crystal display element of the present invention, the liquid crystal cell and the substrate are bonded via the heating type melting member. And the state of the liquid crystal cell and the substrate can be reliably inspected. In addition, since the protective sheet conventionally provided on the substrate is also unnecessary, it is possible to prevent peeling electrification that occurred when the protective sheet was peeled from the substrate with reduction of industrial waste,
Foreign matter can be substantially prevented from being mixed into the liquid crystal display element. Further, since the liquid crystal cell and the substrate are bonded via the heating type melting member, even when it becomes necessary to peel the substrate from the liquid crystal cell, the substrate can be easily peeled from the liquid crystal cell. . Therefore, the attachment of the members such as the polarizing plate, the phase difference plate and the reflection plate to the liquid crystal cell and the peeling of the members such as the polarization plate, the phase difference plate and the reflection plate attached to the liquid crystal cell from the liquid crystal cell are indicated on the LCD. It is possible to provide a method of manufacturing a liquid crystal display element that can be easily executed without deteriorating quality or causing a product defect.

Further, according to the liquid crystal display device manufacturing apparatus of the present invention, the liquid crystal cell and the substrate can be bonded via the heating type melting member, so that the alignment between the liquid crystal cell and the substrate is ensured before bonding. Thus, the state of the liquid crystal cell and the substrate can be reliably inspected. In addition, since the protective sheet conventionally provided on the substrate is unnecessary, industrial waste can be reduced and peeling electrification that occurs when the protective sheet is peeled off from the substrate can be prevented. Can be prevented. Further, even when the substrate needs to be separated from the liquid crystal cell, the substrate can be easily separated from the liquid crystal cell. Therefore, the attachment of the members such as the polarizing plate, the phase difference plate and the reflection plate to the liquid crystal cell and the peeling of the members such as the polarization plate, the phase difference plate and the reflection plate attached to the liquid crystal cell from the liquid crystal cell are indicated on the LCD. It is possible to provide an apparatus for manufacturing a liquid crystal display element that can be easily executed without deteriorating quality or causing a product defect.

Further, in the liquid crystal display element of the present invention, since the liquid crystal cell and the substrate are bonded via the heating type melting member, entry of foreign matter is substantially prevented, and it is necessary to peel the substrate from the liquid crystal cell. A liquid crystal display element with excellent display characteristics and a good production yield, which can easily peel the substrate from the liquid crystal cell even when it occurs, can be provided.

[Brief description of the drawings]

FIG. 1 is a view schematically showing a configuration of a liquid crystal display element manufacturing apparatus according to the present invention.

FIG. 2 is a view schematically showing one embodiment of a method for manufacturing a liquid crystal display element according to the present invention.

FIG. 3 is a diagram schematically showing a configuration of a liquid crystal display element according to the present invention.

FIG. 4 is a view schematically showing one embodiment of a method for manufacturing a liquid crystal display element according to the present invention.

FIG. 5 is a view schematically showing one embodiment of a method for manufacturing a liquid crystal display element according to the present invention.

FIG. 6 is a diagram schematically showing a configuration of a liquid crystal display device according to the present invention.

FIG. 7 is a view schematically showing one embodiment of a method for manufacturing a liquid crystal display element according to the present invention.

FIG. 8 is a view schematically showing one embodiment of a method for manufacturing a liquid crystal display element according to the present invention.

FIG. 9 is a diagram schematically showing a conventional method of attaching members such as a polarizing plate, a retardation plate, and a reflecting plate to a liquid crystal cell.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Manufacturing apparatus of a liquid crystal display element 2a-2h ... Conveying apparatus 3a-3d ... Stage 4a, 4b ... Coating apparatus 5
a, 5b: monitor 6a-6d: CCD camera 7: positioning device 8
... Processed part 9 ... Roll member 10 ... Peeling means 11 ... Adhesive part
12 ... Inspection unit 13 ... Motor controller 14 ... Illuminance monitor 1
5. Image processing unit 16 Host computer 21 Liquid crystal cell 22
... Polarizing plate 23 ... Hot melt adhesive layer 24 ... Protective sheet 31 ... Liquid crystal display elements 32a and 32b ... Glass substrate
33: Liquid crystal layer 91: Member 92: Rubber adhesive layer 93: Protective sheet 94: Liquid crystal cell 95: Roller 96: Fine particles

Claims (8)

[Claims] A step of laminating a substrate on a main surface of a liquid crystal cell in which a liquid crystal is sandwiched between two substrates via a heat melting type member; a step of melting the heat melting type member; A step of solidifying the heat-fusible member and bonding the liquid crystal cell and the substrate with the heat-fusible member. 2. The step of melting the heat melting type member,
The method according to claim 1, wherein the method is performed at a temperature higher than a liquid crystal-isotropic transition temperature of a liquid crystal included in the liquid crystal cell. 3. A step of laminating a first substrate on a main surface of a liquid crystal cell in which a liquid crystal is sandwiched between two substrates via a first heat melting type member; Melting the member at a first temperature; solidifying the first heat-meltable member melted at the first temperature, and bonding the liquid crystal cell and the first substrate with the heat-melt member Performing a step of laminating a second substrate on a main surface of the first substrate via a second heat-melting member; melting the second heat-melting member at a second temperature. And solidifying the second heat-melting member melted at the second temperature, and bonding the first substrate and the second substrate with the heat-melting member. A method for manufacturing a liquid crystal display device, comprising: 4. The method according to claim 1, wherein the first and second temperatures are higher than a liquid crystal-isotropic transition temperature of a liquid crystal included in the liquid crystal cell.
4. The method according to claim 3, wherein the second temperature is lower than the first temperature. 5. A liquid crystal cell having a liquid crystal sandwiched between two substrates, a main surface of a liquid crystal cell having a main member on a main surface of the liquid crystal cell. Stacking means for stacking so as to be in contact with the main surface of the liquid crystal cell, and arranging means for arranging the substrate stacked on the main surface of the liquid crystal cell by the stacking means at a fixed position on the main surface of the liquid crystal cell; A first arrangement for judging a state of the substrate and the liquid crystal cell arranged at a fixed position on the main surface of the liquid crystal cell by the arrangement means;
Determining means, and when the first determining means determines that the substrate and the liquid crystal cell are in a desired state, bonding means for bonding the substrate and the liquid crystal cell by the heat-melting member And a second judging means for judging a state of the liquid crystal cell and the substrate adhered by the adhering means. 6. An attaching means for attaching a heat-meltable member to a main surface of a liquid crystal cell in which liquid crystal is sandwiched between two substrates, and the heat-meltable member is attached by the attaching means. Stacking means for stacking a substrate on the main surface of the liquid crystal cell, and arranging means for arranging the substrate stacked on the main surface of the liquid crystal cell by the stacking means at a fixed position on the main surface of the liquid crystal cell; A first arrangement for judging a state of the substrate and the liquid crystal cell arranged at a fixed position on the main surface of the liquid crystal cell by the arrangement means;
Determining means, and when the first determining means determines that the substrate and the liquid crystal cell are in a desired state, bonding means for bonding the substrate and the liquid crystal cell by the heat-melting member And a second judging means for judging a state of the liquid crystal cell and the substrate adhered by the adhering means. 7. The apparatus according to claim 5, further comprising a peeling unit for peeling off the liquid crystal cell and the substrate bonded by the heat melting type member by remelting the heat melting type member. Or a manufacturing apparatus for a liquid crystal display element according to any one of the above items 6. 8. A liquid crystal display device comprising: a liquid crystal cell in which liquid crystal is sandwiched between two substrates; and a substrate adhered on a main surface of the liquid crystal cell by a heat melting type member.