JPH0980449A - Display device and manufacture for liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a driver part from being damaded by water to be used in the cutting process of a substrate by preventing the water from being infiltrat ed into the driver part. SOLUTION: A pixel part 2, drivers 3, 4 positioned at the periphery of the display part 2, a connection terminal 5 to external circuits positioned at the outside of the drivers 3, 4 are provided on a TFT substrate 6, and the TFT substrate 6 and a counter electrode substrate 11 are fixed via a sealing part. The sealing part is constituted of an outside sealing part 14 enclosing the pixel part 2 and the drivers 3, 4 and an inside sealing part 13 enclosing the pixel part 2. Moreover, in case of arranging a spacer such as polymer beads on the TFT substrate 6, the spacer is prevented from being positioned on the drivers 3, 4 by masking the drivers 3, 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device and a method of manufacturing a liquid crystal display device, and more particularly to a seal structure between substrates.

[0002]

2. Description of the Related Art In recent years, because of excellent display characteristics,
2. Description of the Related Art Active matrix liquid crystal display devices (LCDs) in which a liquid crystal switching element is arranged for each pixel are being actively developed. In particular, a thin film transistor (TFT) using a polycrystalline silicon film as an active layer as a switching element can realize a high-performance LCD and can be used not only in a pixel section (display section) but also in a peripheral drive circuit (driver section).
Can be integrally formed on the same substrate and is drawing attention as a small panel for viewfinders and projectors.

In a liquid crystal display device using such a driver-integrated substrate, a TFT substrate provided with TFTs forming a driver circuit and a switching element and a counter electrode substrate having a counter electrode formed in a display area are bonded together. ,
A liquid crystal display panel is configured by enclosing a liquid crystal between them. 19 to 22 show L by the conventional method.
4 shows a manufacturing process of a CD panel.

Process (see FIG. 19): TFT substrate 51
Forms a pixel portion 52 in the center and a gate driver 53 on the left and right of the glass substrate, and
2, a drain driver 54 is formed below the drain driver 54, and an external circuit connection terminal 55 (a terminal for inputting a display signal to each driver 53, 54) is formed above the drain driver 54.

Step (see FIG. 20): Spacers such as polymer beads are dispersed on the TFT substrate 51. on the other hand,
A sealing agent is applied to the counter electrode substrate 56 at a position surrounding the pixel portion 52 of the TFT substrate 51, and the TFT substrate 51 and the counter electrode substrate 56 are adhered to each other to form the pixel portion 52.
A seal portion 57 that surrounds is formed.

Process (see FIG. 21): Both substrates 51, 56
The left and right ends and the lower end of the are cut linearly. This cutting is carried out by a scribing method (a method of making scratches on the surface of the substrate with a diamond cutter or the like for the purpose of cutting off the excess portion of the substrate, and applying an impact at the boundary to cut off the excess portion). The seal part 57 has an injection part 58 that opens at the lower ends of both substrates 51 and 56. From this injection part 58, a liquid crystal is formed in a space formed by both the substrates 51 and 56 and the seal part 57. Is injected into the pixel portion 5
A liquid crystal layer is formed above 2.

Step (see FIG. 22): the TFT substrate 5
The upper end of 1 is cut into a straight line using a scribing method. Finally, the upper end portion of the counter electrode substrate 56 is linearly cut using a scribing method. At this time, the counter electrode substrate 56 is formed on the TFT substrate 51 in a later step.
Connection terminal 55 to connect to the connection terminal 55
The end is cut off so that is exposed from above.

In this way, the LCD substrate is completed.

[0009]

The conventional example has the following problems. When the counter electrode substrate is formed by the scribing method in the step 1), the drain driver may be damaged due to the fact that the vicinity of the drain driver is cut.

There is a dicing method (a surplus portion of the substrate is cut by a dicing saw) instead of the scribing method, but this dicing removes water in order to reduce frictional heat generated at the time of cutting. Since water is used, there is a problem that the water collects outside the seal portion, that is, in a place where the driver exists, and reduces reliability as a driver such as a short-circuit accident or malfunction.

Particularly, regarding this water, water may be used in the LCD panel washing step and may be exposed to water or moisture even after the product is commercialized. Therefore, a cutting method other than the scribing method that does not use water is used. Even if you disconnect by, the same concern remains. In the step 2), if a spacer such as polymer beads is located above the driver when the TFT substrate and the counter electrode substrate are bonded together, the driver may be damaged by pressure.

3) At the time of injecting the liquid crystal, deformation of the seal portion due to pressure and floating or peeling of the seal portion occur. The present invention relates to a display device and a method for manufacturing a liquid crystal display device, and solves such a problem.

[0013]

According to a first aspect of the present invention, a display device includes:
A pair of substrates connected via a seal part,
The seal portion is configured by a first seal member that surrounds the display portion provided on the substrate. The display device according to claim 2, wherein a pair of substrates are connected via a seal portion, and the seal portion surrounds a display portion provided on the substrate, a first seal member, the display portion, and a driver. And a second seal member surrounding the portion.

According to a third aspect of the present invention, in the display device, a pair of substrates are connected via a seal portion, and the seal portion is
Of the display unit and the driver unit provided on the substrate, the first seal member surrounds only the display unit, and
The driver part is resin-molded. The display device according to claim 4, wherein a pair of substrates are connected via a seal portion, and the seal portion is a first seal that surrounds the display portion among the display portion and the driver portion provided on the substrate. It is configured by a member and a second seal member that surrounds the display unit and the driver unit, and the driver unit is resin-molded.

According to a fifth aspect of the present invention, in the display device, the first sealing member is opened at a portion along the edge of the pair of substrates to form a first opening, and both sides of the first opening are formed.
The first seal member and the second seal member are separated from each other,
The display device according to any one of claims 2 to 4, wherein a third opening is formed. The display device according to claim 6 is
6. A terminal for connection with an external circuit is provided on at least one end of the pair of substrates, wherein the terminals are provided.
The display device according to any one of 1.

According to another aspect of the display device of the present invention, one of the substrates is provided with a display section, a driver section located around the display section, and a terminal for connecting to an external circuit located outside the driver section. The one substrate and the other substrate are fixed via a seal portion, and the seal portion is configured by a second seal portion that surrounds the display portion and the driver portion.

According to another aspect of the display device of the present invention, a display portion, a driver portion located around the display portion, and a terminal for connecting to an external circuit located outside the driver portion are provided on one substrate. One substrate and the other substrate are fixed via a seal portion, and the seal portion includes a first seal portion surrounding the display portion and a second seal portion surrounding the display portion and the driver portion. It is composed.

According to a ninth aspect of the present invention, there is provided a display unit, a driver unit located around the display unit, and a terminal for connection with an external circuit located outside the driver unit on one substrate. One substrate and the other substrate are fixed via a seal portion, the driver portion is resin-molded, and the seal portion is constituted by a first seal portion surrounding the display portion.

According to a tenth aspect of the present invention, in the display device according to the tenth aspect, the first seal member is opened at a portion along the edges of the pair of substrates.
10. The second opening and the third opening are formed by separating the first seal member and the second seal member on both sides of the first opening, respectively. The display device according to item 1. The display device according to claim 11 is characterized in that a member having a gap holding function is mixed in the first seal portion.
The display device according to any one of 4, 5, 6, 8, 9, and 10.

According to a twelfth aspect of the present invention, the display device according to the twelfth aspect is characterized in that a member having a gap maintaining function is mixed in the second seal portion. The display device described in 1. 14. The display device according to claim 13, wherein liquid crystal is sealed in a space formed by the pair of substrates and the first seal portion.
The display device according to any one of 4, 5, 6, 8, 9, and 10.

The display device according to claim 14 is characterized in that a liquid crystal is enclosed in a space formed by the pair of substrates and the second seal portion. 8,
10. The display device according to any one of 10. The display device according to a fifteenth aspect is the display device according to the thirteenth or fourteenth aspect, wherein a spacer material is arranged in a space in which the liquid crystal is sealed.

The display device according to claim 16 is characterized in that, of the pair of substrates, a part of the other substrate is cut so that the connection terminals provided on one substrate are exposed. The display device according to any one of 6 to 15. The display device according to claim 17 is the display device according to claim 16, wherein the cutting is performed by dicing.

A method for manufacturing a liquid crystal display device according to claim 18 is
Liquid crystal enclosed in a space formed by one substrate having a display portion, a driver portion, and a terminal for connecting to an external circuit, the other substrate facing this substrate, and a seal portion connecting these substrates. A method of manufacturing a liquid crystal display device comprising: a step of masking the driver part and disposing a spacer material on the display part; a step of surrounding the display part with a first seal part; Step of bonding the substrate and the other substrate with a predetermined distance, and a part corresponding to the connection terminal on the one substrate and the connection terminal on the other substrate Other than the step of cutting into a predetermined shape, a step of cutting the part of the one substrate where the connection terminal is provided into a predetermined shape, and exposing the connection terminal provided on the one substrate Sea urchin, a portion of the other substrate, the method of manufacturing the liquid crystal display device than the first seal portion and the step of cutting outside locations, comprising a.

A method of manufacturing a liquid crystal display device according to claim 19 is
A liquid crystal sealed in a space formed by one substrate having a display portion, a driver portion, and a terminal for connecting to an external circuit, the other substrate facing this substrate, and a seal portion connecting these substrates, A method of manufacturing a liquid crystal display device comprising: a step of masking the driver section and a spacer material on the display section; and enclosing the display section with a first seal member, A step of enclosing the driver part and the driver part with a second seal member, a step of bonding the one substrate and the other substrate with a predetermined distance therebetween, and the connection terminal on the one substrate. And a step of cutting a part other than the part corresponding to the part of the connection terminal on the other substrate into a predetermined shape, and a part of the one substrate where the connection terminal is provided are predetermined. And a step of cutting a part of the other substrate at a position outside the first seal portion so that the connection terminals provided on the one substrate are exposed. It includes.

A method of manufacturing a liquid crystal display device according to claim 20 is
Liquid crystal sealed in a space formed by one substrate having a display portion, a driver portion, and a terminal for connecting to an external circuit, the other substrate facing this substrate, and a seal portion connecting these substrates, A method of manufacturing a liquid crystal display device, comprising: a step of resin-molding the driver section and a spacer material on the display section; a step of surrounding the display section with a first seal section; Bonding one substrate and the other substrate with a predetermined distance therebetween,
A step of cutting a portion other than the portion corresponding to the portion of the connection terminal on the one substrate and the connection terminal on the other substrate into a predetermined shape,
A step of cutting a portion of the one substrate where the connection terminal is provided into a predetermined shape, and a part of the other substrate so that the connection terminal provided on the one substrate is exposed. And a process.

A method for manufacturing a liquid crystal display device according to claim 21 is
A liquid crystal sealed in a space formed by one substrate having a display portion, a driver portion, and a terminal for connecting to an external circuit, the other substrate facing this substrate, and a seal portion connecting these substrates, A method of manufacturing a liquid crystal display device comprising: a step of masking the driver section and a spacer material on the display section; and a step of surrounding the display section with a first seal section, A step of cutting a portion other than a portion corresponding to the portion of the connecting terminal on the one substrate where the connecting terminal is provided and a portion of the other substrate into a predetermined shape, and a resin between the pair of substrates. Filling and resin-molding the driver portion, cutting a portion of the one substrate where the connection terminal is provided into a predetermined shape, and connecting end provided on the one substrate. So it exposes, is intended to include a step of cutting a portion of the other substrate.

A method of manufacturing a liquid crystal display device according to claim 22 is
19. The dicing method is used as a cutting method in the step of cutting a part of the other substrate so that the connection terminals provided on the one substrate are exposed.
22. A method of manufacturing a liquid crystal display device according to any one of items 21 to 21. <Operation> That is, by enclosing the driver portion with the second seal member or resin-molding, even if water or the like is used in the cutting process of the substrate, the cleaning process, or other cases, the driver portion is not covered with water. Moisture does not enter.

By providing the second seal member on the outside of the first seal member and the resin molding material, the substrate is less likely to bend. In addition, the gap (distance) between the substrates is stabilized by mixing a member having a gap holding function in the first seal portion. In addition, when the driver part and the second seal part are separated from each other, a member having a space maintaining function may be mixed in the second seal part.

Further, after the driver portion is masked or resin-molded, a spacer material is arranged on the entire surface of the substrate,
No spacer material is located on the driver part.

[0030]

【Example】

(First Embodiment) A first embodiment of the present invention will be described with reference to the drawings. 1 to 6 are views for explaining a method of manufacturing a liquid crystal display panel according to the first embodiment.
6A is a sectional view taken along line AA in FIG. 5, and FIG. 6B is B in FIG.
It is a -B sectional view.

Step 1 (see FIG. 1): The TFT substrate 6 as one substrate is prepared in the following manner. As the substrate material, the planar shape is substantially circular, and the thickness is 0.7 to 1.1 having the linear portion 1 for alignment in the lower part in the drawing.
mm quartz glass is used. Instead of quartz glass, non-alkali glass may be used. On the above substrate,
The pixel portion 2 is formed in the central region, the gate drivers 3a and 3b are formed on the left and right sides of the pixel portion 2 in the drawing, and the drain driver 4 is formed below the pixel portion 2 in the drawing. By forming the connection terminal 5 with the external circuit in the lower part of the drawing of FIG.
The T substrate 6 is configured.

Step 2 (see FIGS. 2 and 6): The gate driver 3a on the TFT substrate 6 obtained as described above,
3b and the drain driver 4 are covered with masks 7 to 9, respectively, and the entire upper surface of the substrate, particularly the pixel portion 2,
Spacers 10 such as polymer beads are dispersed. The spacers 10 are for maintaining a uniform gap between the liquid crystal cells, that is, a gap between the TFT substrate 6 and a counter electrode substrate 11 described later.

Step 3 (see FIG. 3): The counter electrode substrate 11 has a substantially circular plan shape, and has a linear portion 12 for alignment in the lower part of the drawing.
Quartz glass of 1.1 mm is used. In FIGS. 3 and 4,
Since the counter electrode substrate 11 is transparent and has the same outer shape as the TFT substrate 6, the same reference numeral 11 as the counter electrode substrate above is attached to the same portion as the TFT substrate 6. Instead of quartz glass, non-alkali glass may be used.

A position surrounding the pixel portion 2 on the TFT substrate 6,
A sealant is applied to each position on the counter electrode substrate corresponding to the position surrounding the pixel portion and the drivers 3a, 3b and 4. Next, the masks 7 to 9 are removed to remove the TFT substrate 6
And the counter electrode substrate 11 and the straight line portions 1 and 12 provided on the respective substrates are aligned and bonded together while performing alignment, and a pressure of about 0.5 to 2.0 Kg / cm ² is applied to the counter electrode substrate 11 for about 150. Thermocompression bonding is performed at a temperature of ℃ for 1 hour or more. As a result, the applied sealant is cured and the TFT substrate 6 and the counter electrode substrate 11 are bonded to each other. As a result, the inner seal portion 1 as the first seal member that surrounds the pixel portion 2
3, and an outer seal portion 14 as a second seal member that surrounds the pixel portion 2 and the drivers 3a, 3b, and 4.

Inner seal portion 13 and outer seal portion 14
Is formed in a closed ring shape except for a portion where first to third openings described below are provided. That is, in the inner seal portion 13, a first opening 15a for injecting liquid crystal in a later step is formed above the drawing. In addition, on both sides of the portion where the first opening 15a is formed,
The inner seal portion 13 and the outer seal portion 14 are separated from each other, so that the second and third openings 15b and 15c are formed. The second and third openings will be described later.

The inner seal portion 13 is made of, for example, an epoxy adhesive as a sealant, and has a fiber length of 3 to 5 μm.
It is composed of a material mixed with a material having a distance maintaining function such as glass fiber. Due to the presence of the material having the space maintaining function, the TFT substrate 6
The distance between the counter electrode substrate and the counter electrode substrate can be stably maintained. The first seal part does not surround the driver part.

On the other hand, the outer seal portion 14 is formed by using, for example, an epoxy adhesive as a sealant, and glass fiber or the like is not mixed therein. This is because the outer seal portion 14 is the drain driver 4
Since it passes through a narrow space having a width of about 1 to 2 mm between the connection terminal 5 and the connection terminal 5, it is easy to contact the drain driver 4. Therefore,
This is because if the glass fiber or the like is mixed, the drain driver 4 may be damaged and malfunction may occur.

The TFT substrate 6 and the counter electrode substrate 11
In the display area, that is, in the portion corresponding to the pixel portion 2, an alignment film having a thickness of 1000 to 2000 Å is formed by applying an alignment film material such as polyimide,
Rubbing it. Step 4 (see FIG. 4): TFT substrate 6 and counter electrode substrate 1
The left end portion, the upper end portion, and the upper end portion in the drawing of 1 are linearly cut by a scribing method.

In this state, TF is passed through the first opening 15a.
Liquid crystal is injected into the space formed by the T substrate 6, the counter electrode substrate 11, and the inner seal portion 13 to form a liquid crystal layer above the pixel portion 2. Next, the first opening 15a as an injection part
Are sealed with the stopper 16. When injecting the liquid crystal, the TFT substrate and the counter electrode substrate 11 bonded together
Are maintained under reduced pressure. In this case, not only the space into which the liquid crystal is injected is vacuum-sucked, but also the inner seal portion 13
The space between the outer seal portion 14 is also vacuumed. Therefore, the space where the liquid crystal is injected and the space between the inner seal portion 13 and the outer seal portion 14 are maintained under the same pressure. Therefore, the deformation due to the pressure difference between the inner seal portion 13 and the outer seal portion 14 and the floating or peeling of the seal portions 13 and 14 can be reliably prevented.

Step 5 (see FIG. 5): The vicinity of the lower end portion of the TFT substrate 6 in the drawing is formed by a dicing method as shown in FIG.
A straight line is cut and removed along the solid line D. In this way, as shown in FIG. 5, the length is about 50 mm and the width is about 7 mm.
It is possible to obtain the TFT substrate 6 having a substantially rectangular shape of 0 mm. Next, the vicinity of the lower end of the counter electrode substrate 11 in the drawing is cut linearly by using the dicing method. In this case, in a subsequent step, in order to facilitate the work of connecting the counter electrode (not shown) provided on the counter electrode substrate 11 to the connection terminal 5 provided on the TFT substrate 6, the counter electrode substrate 11 is The vicinity of the lower end portion of the counter electrode substrate 11 in the drawing is cut so that the connection terminal 5 is exposed when viewed from above. That is, as is apparent from FIG. 6A, the end portion 11 a of the counter electrode substrate 11 exposes the connection terminal 5. In this way, the counter electrode substrate 11 has a length of about 45 m.
It is processed into a rectangular shape of m × width of about 70 mm.

At the time of this dicing, a large amount of water is used to suppress heat due to friction between the dicing saw and the substrate. However, since the drivers 3a, 3b and 4 are surrounded by the outer seal portion 14, there is no possibility that water will enter the driver. The liquid crystal display panel according to the first embodiment of the present invention is manufactured as described above.
The LCD can be completed by performing operations such as electrical connection well known in the technical field on the obtained liquid crystal display panel. (Second Embodiment) Next, a second embodiment of the present invention will be described with reference to the drawings. However, the same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

FIGS. 1 and 7 to 10 show the manufacturing process of the LCD panel according to the second embodiment. Step 11 (see FIG. 1): As in Step 1, the TFT substrate 6
To produce. Step 12 (see FIG. 7): The gate drivers 3a and 3b on the TFT substrate 6 and the drain driver 4 are made of a resin 17 having water resistance and viscosity (for example, epoxy thermosetting resin).
Then, spacers 10 such as polymer beads are dispersed on the entire surface of the substrate mainly including the pixel portion 2.

Step 13 (see FIG. 8): Counter electrode substrate 11
Has a substantially circular planar shape and has a linear portion 12 for alignment in the lower part of the drawing, and a thickness of 0.7 to 1.0
mm quartz glass is used. In FIGS. 8 and 9, the counter electrode substrate 11 has the same outer shape as the TFT substrate 6 and is transparent, so that the same reference numeral 1 is attached to the same portion as the TFT substrate 6.
Add 1.

The position surrounding the pixel portion 2 of the TFT substrate 6 and T
A sealant is applied to the positions on the counter electrode substrate 11 corresponding to the positions surrounding the pixel section 2 and the drivers 3a, 3b, 4 of the FT substrate 6, respectively, and the TFT substrate 6, the counter electrode substrate 11, and the counter electrode. The substrate 11 and the straight line portions 1 and 12 provided on the respective substrates are aligned with each other so as to be aligned and bonded. After that, about 0.5 to 2.0 Kg / cm ²
The applied sealant is cured by thermocompression bonding at a temperature of about 150 ° C for 1 hour or more while applying the pressure of
The T substrate 6 and the counter electrode substrate 11 are bonded together. As a result, the inner seal portion 13 that surrounds the pixel portion 2 and the outer seal portion 14 that surrounds the pixel portion 2 and the drivers 3a, 3b, and 4.
Is configured. The inner seal portion 13 is formed with a first opening 15a for injecting liquid crystal in a later step upward in the drawing.

On both sides of the first opening 15a, the second,
Third openings 15b and 15c are formed. At this time, the resin 17 is crushed between the TFT substrate 6 and the counter electrode substrate 11 and spreads between the inner seal portion 13 and the outer seal portion 14. The inner seal portion 13 is made of the same material as that of the first embodiment, and is made of, for example, an epoxy adhesive and glass fiber (3 to 5 μm).
Since a material mixed with a spacer agent such as m) is used, the presence of this glass fiber causes each substrate 6, 1
It has the function of maintaining the interval between the two.

On the other hand, the outer seal portion 14 uses, for example, an epoxy adhesive as a sealant, and is not mixed with glass fiber or the like. This is because the outer seal portion 14 passes through a narrow space (width 1 to 2 mm) between the drain driver 4 and the connection terminal 5, so that it is easy to contact the drain driver 4 and glass fibers or the like are mixed. This is because the drain driver 4 may be damaged and malfunction may occur.

Incidentally, the TFT substrate 6 and the counter electrode substrate 1
For example, an alignment film material such as polyimide is applied to a portion corresponding to the display region 1 (pixel unit 2) of 1 to 1000
An alignment film having a thickness of up to 2000 Å is formed and a rubbing process is performed. Step 14 (see FIG. 9): The left and right end portions and the upper end portion of both substrates 6 and 11 are linearly cut by a scribing method.

In this state, TF is passed through the first opening 15a.
Liquid crystal is injected into the space formed by the T substrate 6, the counter electrode substrate 11, and the inner seal portion 13 to form a liquid crystal layer above the pixel portion 2. The first opening 15a is sealed with a stopper 16. In addition, as in the case of the first embodiment, when injecting the liquid crystal, the TFT substrate and the counter electrode substrate 1 bonded together are bonded.
1 is maintained under reduced pressure. In this case, since the second and third openings 15b and 15c are provided, the pressure difference does not occur in the space between the inner seal portion 13 and the outer seal portion 14 in the second embodiment as well. Therefore, therefore, it is possible to reliably prevent the deformation due to the pressure difference between the inner seal portion 13 and the outer seal portion 14 and the floating or peeling of the seal portions 13 and 14.

Step 15 (see FIG. 10): The lower end of the TFT substrate 6 is linearly cut along the solid line E in FIG. 9 by using the dicing method. Thus, the TFT substrate 6 has a vertical length of about 5
It is processed into a rectangular shape of 0 mm × width of about 70 mm. next,
The lower end of the counter electrode substrate 11 is cut linearly by using a dicing method. At this time, the counter electrode substrate 1
In order to facilitate the connection of the TFT substrate 6 to the connection terminal 5 in the subsequent step, the end 1 is cut so that the connection terminal 5 is exposed when viewed from above. In this way, the counter electrode substrate 11 is processed into a rectangular shape having a length of about 45 mm and a width of about 70 mm.

A large amount of water is used during this dicing, but there is no risk of water entering the driver due to the presence of the outer seal portion 14 and the resin 17. In this way, the liquid crystal display panel according to the second embodiment can be obtained. (Third Embodiment) Next, a third embodiment of the present invention will be described with reference to FIGS. However, the same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

Since the only difference from the second embodiment is that the outer seal portion is not provided, only the processes corresponding to steps 13 to 15 of the second embodiment will be described. Step 21 (see FIG. 11): As the counter electrode substrate 11, quartz glass having a substantially circular plane shape and having a linear portion 12 for alignment is used in the lower portion. 11 and 12, the counter electrode substrate 11 has the same outer shape as the TFT substrate 6 and is a transparent substrate. Therefore, the same reference numeral 11 is given to the same portion as the TFT substrate 6.

A sealant is applied to the counter electrode substrate 11 at a position surrounding the pixel portion 2 of the TFT substrate 6, and a TFT is formed.
The substrate 6 and the counter electrode substrate 11 are attached to each other, and about 0.5 to
The applied sealant is cured by thermocompression bonding at a temperature of about 150 ° C. for 1 hour or more while applying a pressure of 2.0 Kg / cm ² , and the TFT substrate 6 and the counter electrode substrate 11 are bonded to each other.

As a result, the inner seal portion 13 surrounding the pixel portion 2 is formed. At this time, the resin 17 is TF
It is crushed and spread between the T substrate 6 and the counter electrode substrate 11, and each driver is molded. The inner seal portion 13 is made of, for example, an epoxy-based adhesive as a sealing agent, for example, glass fiber (fiber length: 3 to 5 μm).
Since a material mixed with a spacer agent as described above is used, the presence of this spacer agent has a function of maintaining the distance between the substrates 6 and 11.

Incidentally, the TFT substrate 6 and the counter electrode substrate 1
For example, an alignment film material such as polyimide is applied to a portion corresponding to the display region 1 (pixel unit 2) of 1 to 1000
An alignment film having a thickness of up to 2000 Å is formed and a rubbing process is performed. Step 22 (see FIG. 12): The left and right end portions and the upper end portion of both substrates 6 and 11 are cut linearly by a scribing method.

In this state, liquid crystal is injected from the first opening 15a into the space formed by the substrates 6 and 11 and the inner seal portion 13 to form a liquid crystal layer above the pixel portion 2. The injection part 15 is sealed with a plug 16. Step 23 (see FIG. 13): The vicinity of the lower end of the TFT substrate 6 in the drawing is linearly cut along a solid line F in FIG. 12 by using a dicing method. In this way, the TFT substrate 6 is processed into a rectangular shape having a length of about 50 mm and a width of about 70 mm.

Next, the lower end portion of the counter electrode substrate 11 placed on the drawing is cut linearly by using a dicing method. At this time, in order to facilitate connection of the counter electrode substrate 11 to the connection terminal 5 of the TFT substrate 6 in a later step, the end portion of the counter electrode substrate 11 is cut so that the connection terminal 5 is exposed when viewed from above. To be done. In this way, the counter electrode substrate 11 is
Cut so as to have the end 11a, about 45 mm long ×
It is processed into a rectangular shape with a width of about 70 mm.

A large amount of water is used for this dicing, but there is no possibility that water will enter the driver section due to the presence of the resin 17. In this way, the LCD substrate is completed. As described above, in the second and third embodiments, by molding the driver with resin, compared to the first embodiment,
Excellent in preventing water and moisture from entering. Furthermore, since the TFT substrate 6 and the counter electrode substrate 11 are supported over a wide area as much as the resin is present, a stable cell gap can be maintained. (Fourth Embodiment) Next, a fourth embodiment of the present invention will be described with reference to the drawings. However, the same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

FIGS. 1, 2, and 14 to 16 show the manufacturing process of the LCD panel according to the fourth embodiment. Step 31 (see FIG. 1): As in Step 1, the TFT substrate 6
Is configured. Step 32 (see FIG. 2): As in Step 2, the TFT substrate 6
Upper gate drivers 3a and 3b and drain driver 4
Then, masks 7 to 9 are covered, and spacers such as polymer beads are dispersed over the entire surface of the substrate mainly including the pixel portion 2.

Step 33 (see FIG. 14): Counter electrode substrate 1
As 1, a quartz glass having a thickness of 0.7 to 1.1 mm, which is substantially circular and has a straight line portion 12 for alignment at the lower portion is used. The TFT substrate 6 in the counter electrode substrate 11
A sealing agent is applied to the position surrounding the pixel portion 2, the masks 7 to 9 are removed, and the TFT substrate 6 and the counter electrode substrate 11 are attached (at this time, the linear portion 1 provided on each substrate,
The two are aligned by matching 12), and the applied sealing agent is cured by thermocompression bonding at 150 ° C for 1 hour while applying a pressure of about 0.5 to 2.0 Kg / cm ^2. Then, the TFT substrate 6 and the counter electrode substrate 1
1 and 1 are made to adhere. As a result, the inner seal portion 13 surrounding the pixel portion 2 is formed. The inner seal portion 13
Has an injection part 15 for injecting liquid crystal in a later step on the upper part thereof.

Since the inner seal portion 13 uses, as a sealant, an epoxy adhesive mixed with a spacer agent such as glass fiber (3 to 5 μm), the presence of this spacer agent Therefore, it has a function of maintaining the distance between the substrates 6 and 11. The T
A portion of the FT substrate 6 and the counter electrode substrate 11 corresponding to the display region (pixel portion 2) is coated with an alignment film material such as polyimide to form an alignment film having a thickness of 1000 to 2000 Å, and a rubbing treatment is performed. It is carried out.

Step 34 (see FIG. 15): Both substrates 6 and 11
The left and right ends and the upper end of the are cut linearly by the scribing method. In this state, the resin 18 is filled from between the substrates 6 and 11, and each driver is molded with the resin 18. The material of the resin 18 may be the same as that of the resin 17, and since a gap is already formed between the substrates, a resin having a viscosity corresponding to the size of the gap may be appropriately selected and used. .

Further, liquid crystal is injected from the injection section 15 into the space formed by the substrates 6 and 11 and the inner seal section 13 to form a liquid crystal layer above the pixel section 2. The injection part 15 is sealed with a plug 16. Step 35 (see FIG. 16): The lower end portion of the TFT substrate 6 is linearly cut using a dicing method. Thus
The TFT substrate 6 is processed into a rectangular shape having a length of about 50 mm and a width of about 70 mm.

Next, the lower end portion of the counter electrode substrate 11 is linearly cut by the dicing method. At this time, in order to facilitate connection of the counter electrode substrate 11 to the connection terminal 5 of the TFT substrate 6 in a later step, the end portion of the counter electrode substrate 11 is cut so that the connection terminal 5 is exposed when viewed from above. To be done. In this way, the counter electrode substrate 11 is processed into a rectangular shape having a length of about 45 mm and a width of about 70 mm.

A large amount of water is used during this dicing, but there is no concern that water will enter the driver due to the presence of the resin 18. In this way, the LCD substrate is completed. In the fourth embodiment, since the resin is filled in the driver portion, the effect of preventing water and water from entering is superior to that in the first embodiment. Furthermore, since there is resin, TFT
Since the substrate 6 and the counter electrode substrate 11 are supported in a wide area, a stable cell gap can be maintained.

Further, as compared with the second and third embodiments,
As described above, since the gap is already formed between the substrates at the time of filling the resin, it is possible to arbitrarily select the resin having the viscosity according to the size of the gap.
In the second to fourth embodiments, when the counter electrode substrate 11 is cut and processed by dicing, the counter electrode substrate 11 is cut along the outside of the inner sealant 13 so as to cover only the pixel portion 2. Of course, by doing so, the area of the counter electrode substrate 11 can be reduced, and the weight of the LCD device can be reduced.

As described above, in the first to fourth embodiments, the place where the scribing method is used as the cutting method of the substrate may be replaced with the dicing method. Here, a specific circuit on the TFT substrate 6 will be described below.
FIG. 17 is a block diagram of an active matrix type LCD. Each scanning line (gate wiring) G1 in the pixel portion 2
..Gn, Gn + 1 ・ ・ ・ Gm and each data line (drain wiring) D1 ・ ・ ・ D
n, Dn + 1 ... Dm are arranged. Each gate wiring and each drain wiring are orthogonal to each other, and the pixel 2
1 is provided. Then, each gate wiring is connected to the gate driver 3 so that a gate signal (scanning signal) is applied. Further, each drain wiring is connected to a drain driver (data driver) 4 so that a data signal (video signal) is applied.
The peripheral drive circuit 22 is configured by these drivers 3 and 4.

An LC in which at least one of the drivers 3 and 4 is formed on the same substrate as the pixel portion 2
D is generally a driver integrated type (driver built-in type) LCD
is called. The gate driver 3 may be provided on both sides of the pixel unit 2 as in the present embodiment.
Further, the drain driver 4 may be provided on both sides of the pixel unit 2.

FIG. 18 shows the gate wiring Gn and the drain wiring Dn.
An equivalent circuit of the pixel 21 provided in a portion orthogonal to is shown. The pixel 21 is composed of a TFT as a pixel driving element, a liquid crystal cell LC, and a storage capacitor CS. The gate of the TFT is connected to the gate wiring Gn, and T is connected to the drain wiring Dn.
The drain of the FT is connected. The display electrode (pixel electrode) of the liquid crystal cell LC and the auxiliary capacitance (storage capacitance or additional capacitance) CS are connected to the source of the TFT.

The liquid crystal cell LC and the auxiliary capacitance CS form a signal storage element. The voltage Vcom is applied to the common electrode (electrode opposite to the display electrode) of the liquid crystal cell LC. On the other hand, in the auxiliary capacitor CS, a constant voltage VR is applied to the electrode on the side opposite to the side connected to the source of the TFT. The common electrode of the liquid crystal cell LC is literally a common electrode for all the pixels 21. Further, a capacitance is formed between the display electrode and the common electrode of the liquid crystal cell LC. In addition, in the auxiliary capacitance CS,
The electrode on the side opposite to the side connected to the source of the TFT may be connected to the adjacent gate wiring Gn + 1.

In the pixel 21 thus constructed,
When the gate wiring Gn is set to a positive voltage and a positive voltage is applied to the gate of the TFT, the TFT turns on. Then, the capacitance of the liquid crystal cell LC and the auxiliary capacitance CS are charged by the data signal applied to the drain wiring Dn. On the contrary, when the gate wiring Gn is set to a negative voltage and a negative voltage is applied to the gate of the TFT, the TFT is turned off, and the voltage applied to the drain wiring Dn at that time is the electrostatic capacity and the auxiliary capacity of the liquid crystal cell LC. Held by CS. In this manner, by supplying a data signal to be written to the pixel 21 to the drain wiring and controlling the voltage of the gate wiring, the pixel 21 can hold an arbitrary data signal. The liquid crystal cell L according to the data signal held by the pixel 21.
The transmittance of C changes and an image is displayed.

[0071]

The present invention has the following excellent effects. 1) By enclosing the driver part with the first seal part or resin-molding it,
In other cases, even if water or the like is used, water or humidity does not enter the driver section, and it is possible to prevent a short circuit accident or a malfunctioning accident due to water.

2) Since the second seal portion is provided inside the first seal portion and the resin molding material, the substrate is less likely to bend and good display characteristics can be maintained. 3) By mixing a member having a distance maintaining function in the first seal portion and the second seal portion, the gap between the substrates becomes stable, and good display characteristics can be maintained. 4) After masking the driver part or resin molding,
By arranging the spacer material on the entire surface of the substrate, it is possible to prevent the spacer material from being positioned on the driver portion and prevent the driver from being damaged by the spacer.

5) At the time of injecting the liquid crystal, both substrates bonded together are kept under reduced pressure. In this case, the second and third
Since the opening is provided, a pressure difference does not occur in the space between the inner seal portion and the outer seal portion. Therefore, the deformation due to the pressure difference between the inner seal portion and the outer seal portion and the floating or peeling of the seal portion can be reliably prevented.

[Brief description of drawings]

FIG. 1 is a cross-sectional view for explaining a manufacturing process of a first embodiment embodying the present invention.

FIG. 2 is a cross-sectional view for explaining a manufacturing process of a first embodiment which embodies the present invention.

FIG. 3 is a cross-sectional view for explaining a manufacturing process of the first embodiment which embodies the present invention.

FIG. 4 is a cross-sectional view for explaining the manufacturing process of the first embodiment which embodies the present invention.

FIG. 5 is a cross-sectional view for explaining a manufacturing process of the first embodiment which embodies the present invention.

FIG. 6 is a cross-sectional view for explaining the manufacturing process of the first embodiment which embodies the present invention.

FIG. 7 is a cross-sectional view for explaining a manufacturing process of a second embodiment which embodies the present invention.

FIG. 8 is a cross-sectional view for explaining a manufacturing process of a second embodiment which embodies the present invention.

FIG. 9 is a cross-sectional view for explaining the manufacturing process for the second embodiment of the present invention.

FIG. 10 is a cross-sectional view for explaining the manufacturing process for the second embodiment of the present invention.

FIG. 11 is a cross-sectional view for explaining the manufacturing process for the third embodiment of the present invention.

FIG. 12 is a cross-sectional view for explaining the manufacturing process for the third embodiment of the present invention.

FIG. 13 is a cross-sectional view for explaining the manufacturing process for the third embodiment which embodies the present invention.

FIG. 14 is a cross-sectional view for explaining the manufacturing process for the fourth embodiment which embodies the present invention.

FIG. 15 is a cross-sectional view for explaining the manufacturing process for the fourth embodiment which embodies the present invention.

FIG. 16 is a cross-sectional view for explaining the manufacturing process for the fourth embodiment embodying the present invention.

FIG. 17 is a block circuit diagram of a TFT substrate.

FIG. 18 is an equivalent circuit diagram of a pixel.

FIG. 19 is a cross-sectional view for explaining the manufacturing process of the LCD panel in the conventional example.

FIG. 20 is a cross-sectional view for explaining the manufacturing process of the LCD panel in the conventional example.

FIG. 21 is a cross-sectional view for explaining the manufacturing process of the LCD panel in the conventional example.

FIG. 22 is a cross-sectional view for explaining the manufacturing process of the LCD panel in the conventional example.

[Explanation of symbols]

 2 Pixel Part (Display Part) 3 Gate Driver (Driver Part) 4 Drain Driver (Driver Part) 5 Connection Terminal 6 TFT Substrate (One Substrate) 7-9 Mask 10 Spacer 11 Counter Electrode Substrate (Other Substrate) 13 Inner Seal Part (first seal part) 14 Outer seal part (second seal part) 15, 20 Injection part 17 Resin 18 Resin 19 Outer seal part (second seal part)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiyoshi Yoneda 2-5-5 Keihan Hondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Kazuto Noritake 2-chome, Keihan-hondori, Moriguchi-shi, Osaka 5-5 Sanyo Electric Co., Ltd. (72) Inventor Kenichi Kuwahara 2-5-5 Keihan Hondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd.

Claims (22)

[Claims] 1. A display device in which a pair of substrates are connected via a seal portion, and the seal portion is constituted by a first seal member surrounding a display portion provided on the substrate. . 2. A pair of substrates are connected via a seal portion, and the seal portion includes a first seal member surrounding a display portion provided on the substrate, and the display portion and the driver portion. A display device comprising a surrounding second seal member. 3. A pair of substrates are connected via a seal portion, and the seal portion is formed by a first seal member that surrounds only the display portion of the display portion and the driver portion provided on the substrate. A display device having the same structure as described above, wherein the driver portion is resin-molded. 4. A pair of substrates are connected via a seal portion, and the seal portion includes a first seal member that surrounds the display portion of a display portion and a driver portion provided on the substrate, A display device comprising a second seal member surrounding the display unit and the driver unit, and the driver unit being resin-molded. 5. The first seal member is opened at a portion along an edge of a pair of substrates to form a first opening,
The display device according to claim 2, wherein a first seal member and a second seal member are separated from each other on both sides of the first opening to form second and third openings. . 6. The display device according to claim 1, wherein a terminal for connection with an external circuit is provided on at least one end of the pair of substrates. 7. A substrate, a display portion, a driver portion located around the display portion, and a terminal for connecting to an external circuit located outside the driver portion are provided on one substrate. The display device according to claim 1, wherein the substrate is fixed via a seal portion, and the seal portion is formed of a second seal portion that surrounds the display portion and the driver portion. 8. One of the substrates is provided with a display section, a driver section located around the display section, and a terminal for connection with an external circuit located outside the driver section. A substrate is fixed via a seal part, and the seal part is configured by a first seal part surrounding the display part and a second seal part surrounding the display part and the driver part. Display device. 9. A display portion, a driver portion located around the display portion, and a terminal for connecting to an external circuit located outside the driver portion are provided on one substrate, and the one substrate and the other terminal are provided. A display device comprising a substrate and a substrate fixed via a seal portion, the driver portion being resin-molded, and the seal portion being a first seal portion surrounding the display portion. 10. The first seal member is opened at a portion along the edges of the pair of substrates to form a first opening, and the first seal member and the first seal member are provided on both sides of the first opening. The display device according to claim 7, wherein the second seal member is separated from the second seal member, and the second and third openings are formed. 11. A member having a function of maintaining a gap is mixed in the first seal portion.
The display device according to any one of 2, 3, 4, 5, 6, 8, 9, and 10. 12. A member having a space maintaining function is mixed in the second seal portion.
The display device according to any one of 5, 6, 7, 8, and 10. 13. The liquid crystal is enclosed in a space formed by the pair of substrates and the first seal portion, as claimed in claim 1, 2, 3, 4, 5, 6, 8, 9. 10. The display device according to any one of 10. 14. The liquid crystal is enclosed in a space formed by the pair of substrates and the second seal portion, as claimed in any one of claims 2, 4, 5, 6, 7, 8, and 10. Display device according to. 15. The display device according to claim 13, wherein a spacer material is arranged in a space in which the liquid crystal is sealed. 16. The one of the pair of substrates, wherein a part of the other substrate is cut so that a connection terminal provided on one of the substrates is exposed. The display device according to item 1. 17. The display device according to claim 16, wherein the cutting is performed by dicing. 18. A space formed by one substrate having a display portion, a driver portion, and a terminal for connecting to an external circuit, the other substrate facing the substrate, and a seal portion connecting these substrates. A method of manufacturing a liquid crystal display device, comprising: a liquid crystal encapsulated in: a step of masking the driver part and disposing a spacer material on the display part; and enclosing the display part with a first seal part. A step, a step of adhering the one substrate and the other substrate at a predetermined distance from each other, and a portion of the one substrate where the connection terminal is provided and the connection terminal of the other substrate Cutting a portion other than a portion corresponding to a portion into a predetermined shape, a step of cutting a portion of the one substrate where the connection terminal is provided into a predetermined shape, and a contact provided on the one substrate. And a step of cutting a part of the other substrate at a position outside the first seal portion so that the connecting terminal is exposed. 19. A space formed by one substrate having terminals for connecting to a display portion, a driver portion and an external circuit, the other substrate facing the substrate, and a seal portion connecting these substrates. A method for manufacturing a liquid crystal display device comprising: a liquid crystal encapsulated in a liquid crystal display device, the method comprising: masking the driver unit driver unit and disposing a spacer material on the display unit; Enclosing and surrounding the display section and the driver section with a second seal member; bonding the one substrate and the other substrate with a predetermined distance therebetween; and for connecting the one substrate. A step of cutting a portion other than a portion corresponding to the portion of the connection terminal on the other substrate where the terminal is provided and a predetermined shape; and the connection terminal on the one substrate is provided. Cutting the existing part into a predetermined shape, and cutting a part of the other board at a part outside the first seal part so that the connection terminals provided on the one board are exposed. The manufacturing method of the liquid crystal display device characterized by including the process of performing. 20. A space formed by one substrate having a display portion, a driver portion, and a terminal for connecting to an external circuit, the other substrate facing the substrate, and a seal portion connecting these substrates. A method for manufacturing a liquid crystal display device comprising liquid crystal sealed in, wherein a step of resin-molding the driver section and disposing a spacer material on the display section, the display section being a first seal section. A step of enclosing, a step of adhering the one substrate and the other substrate at a predetermined distance from each other, a part of the one substrate where the connection terminal is provided, and the connection terminal on the other substrate A step of cutting a part other than a part corresponding to the part into a predetermined shape, a step of cutting a part of the one board where the connection terminals are provided into a predetermined shape, and the one board And a step of cutting a part of the other substrate so that the provided connection terminals are exposed. 21. A space formed by one substrate having a display portion, a driver portion, and a terminal for connecting to an external circuit, the other substrate facing the substrate, and a seal portion connecting these substrates. A method of manufacturing a liquid crystal display device, comprising: a liquid crystal encapsulated in a liquid crystal display device; and a step of masking the driver unit driver unit and disposing a spacer material on the display unit; A step of enclosing, a step of cutting a portion other than a portion corresponding to the portion of the connecting terminal on the one substrate where the connecting terminal is provided and a portion of the other substrate into a predetermined shape, and the pair of substrates A step of resin-filling between the two, resin-molding the driver part, a step of cutting a portion of the one board where the connection terminals are provided into a predetermined shape, and the one board. And a step of cutting a part of the other substrate so that the provided connection terminals are exposed. 22. The dicing method is used as a cutting method in the step of cutting a part of the other substrate so that the connection terminals provided on the one substrate are exposed. 22. A method of manufacturing a liquid crystal display device according to any one of items 21 to 21.