JP2003255357A - Liquid crystal display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display whose display quality and productivity can be enhanced. <P>SOLUTION: A liquid crystal layer 6 is provided in a housing space 13 interposed between a first substrate 3 and a second substrate 4 and externally surrounded by a plurality of partition parts of a partition 7 having water impermeability. A sealing material 5 is provided between an inside partition part 7a having insolubility to a liquid crystal and an outside partition part 7b having gas impermeability. The inside partition part 7a and the outside partition part 7b are formed by using a negative photosensitive resin and the heights of the inside partition part 7a and the outside partition part 7b are equal to the cell gap. The states of the sealing material 5 and the liquid crystal layer 6 are kept ideal by providing the sealing material 5 between the inside partition part 7a and the outside partition part 7b and the display quality and productivity of the liquid crystal display 1 can be enhanced by forming the sealing material 5 with good accuracy. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device that displays various images including still images and moving images.

[0002]

2. Description of the Related Art Conventional liquid crystal display devices are widely used as devices for displaying various images including still images and moving images. The liquid crystal display device includes a liquid crystal display element. The liquid crystal display element is roughly classified into two driving methods, a simple matrix type and an active matrix type.

A simple matrix type liquid crystal display element has a structure in which a plurality of strip-shaped electrodes are formed on two substrates, and the two substrates are provided so as to face each other with a liquid crystal layer made of liquid crystal interposed therebetween. There is. The electrodes are respectively provided on the two substrates so that the longitudinal direction of the electrodes formed on one substrate and the longitudinal direction of the electrodes formed on the other substrate intersect perpendicularly when viewed in the thickness direction of the substrates. Then, the matrix is constructed. When viewed in the thickness direction of the substrate, a portion where an electrode provided on one substrate and an electrode provided on the other substrate overlap each other is set as a pixel.

In the active matrix type liquid crystal display element, an electrode is provided for each pixel on one substrate, and a thin film transistor (Thin Film Tran) is provided for each electrode.
sistor: abbreviated as TFT), a plurality of strip-shaped electrodes are provided on the other substrate at predetermined intervals, and two substrates are provided via a liquid crystal layer. The thin film transistor is an element having a switch function, and controls a voltage applied between an electrode provided on one substrate and an electrode provided on the other substrate.

A liquid crystal display device using an active element typified by a thin film transistor is thin and lightweight, and can display a high quality image comparable to that of a cathode ray tube.
utomation: Abbreviated as OA) Widely used as a display terminal for equipment. In a liquid crystal display device having an active matrix type liquid crystal display element, for each electrode provided for each pixel,
As described above, each element having a switching function is provided. Since the liquid crystal in each pixel is always driven logically in the active matrix type liquid crystal display element, the contrast is better than that of the simple matrix type liquid crystal display element which is driven in a time division manner, and it is particularly indispensable for color display. It is not there.

In the above-mentioned active matrix type liquid crystal display device, image display methods are roughly classified into two methods. One is a display method using a vertical electric field method. In the vertical electric field method, a liquid crystal layer is sandwiched between two transparent substrates, and the alignment state of liquid crystal molecules in the liquid crystal layer is controlled by a voltage applied between an electrode of one substrate and an electrode of the other substrate. Change by. By changing the alignment state of the liquid crystal molecules, light transmitted through the electrode of one substrate and incident on the liquid crystal layer is modulated, and an image is displayed. The liquid crystal display element using the vertical electric field method is adopted in most of the liquid crystal display devices that are currently widespread. As an example of a liquid crystal display device in which a liquid crystal display element using a vertical electric field system is adopted, there is a liquid crystal display device disclosed in JP-A-63-309921.

The other is a display method by a lateral electric field method. In the horizontal electric field method, an electrode for changing the alignment state of liquid crystal molecules is provided on either one of the two substrates at a predetermined interval so that the electrodes are substantially parallel to the longitudinal direction of the substrate. Is generated to change the alignment state of liquid crystal molecules. By changing the alignment state of the liquid crystal molecules, light incident on the liquid crystal layer from between the two electrodes is modulated to display an image. There are few liquid crystal display devices that employ a liquid crystal display element using a lateral electric field method. Since the liquid crystal display element using the horizontal electric field method has a feature that the viewing angle is extremely wide, the display method by the horizontal electric field method is a promising method for the active matrix liquid crystal display element. As an example of a liquid crystal display device in which a liquid crystal display element using a lateral electric field method is adopted, Japanese Patent Laid-Open No.
The electro-optical liquid crystal switching element shown in Japanese Patent No. 05247 and the liquid crystal display element shown in Japanese Patent Publication No. 63-21907 are mentioned.

In the various liquid crystal display elements described above, the liquid crystal layer provided between the two substrates is surrounded by the sealing material, and the substrates are bonded to each other by the sealing material. The two substrates each have an insulating property, and at least one of the substrates is made of a translucent material such as glass. The liquid crystal display element is further provided with a drive circuit, a polarizing plate, and various optical sheets such as color filters. When the liquid crystal display element is a transmissive type, the two substrates both have translucency, and the liquid crystal display element is provided with a backlight assembly as a light source and a metal frame, in other words, a metallic shield case. To be When the liquid crystal display device is of a reflective type, the backlight assembly is not used, and an image is visually displayed by reflection of light from the outside of the liquid crystal display device.

When manufacturing the above-mentioned various liquid crystal display devices, electrodes are provided on two substrates in the vertical electric field system as described above, and electrodes are provided on one of the two substrates in the horizontal electric field system. It is provided. After the electrodes are provided on the substrate, alignment films are provided on the surfaces of the substrates facing each other. After the alignment films are provided on the two substrates, the sealing material is applied to the substrates so as to surround the effective display area of the substrates by, for example, a method using a dispenser and a method by screen printing. The effective display area of the substrate is an area where the electrodes, the alignment film, and the liquid crystal layer are provided when viewed from the thickness direction of the substrate. At present, a thermosetting epoxy resin is mainly used as a sealing material, and amines, imidazoles and hydrazides are used as a curing agent for the epoxy resin.

After that, either one of heating and leveling without heating is performed, and the two substrates are bonded together based on an alignment mark that serves as a positioning mark. After the two substrates are bonded together, each substrate is pressed so that the distance between the two substrates becomes a predetermined value, and each substrate is adhered by the sealing material. With the sealing material provided between the two substrates, the sealing material contacts the liquid crystal layer and the air. While being sandwiched between the two substrates, the liquid crystal is sealed in the space formed by the sealing material, and the injection port is sealed. When forming a liquid crystal display element, the electrodes, alignment film, sealing material and liquid crystal layer are larger than the substrate.
A plurality of liquid crystal display elements are formed by being provided on one panel and dividing the two panels.

As a specific example of a liquid crystal display device in which a component for adhering two substrates is separately provided in addition to the sealing material, there is a liquid crystal display device disclosed in JP-A-59-26719. In the liquid crystal display element disclosed in JP-A-59-26719, in addition to the sealing material, an adhesive layer for improving the adhesiveness of the sealing material is separately provided between the two substrates, and the sealing material is used. Is provided so as to be surrounded by. The sealing material is provided between the two substrates and is provided so as to surround the liquid crystal layer while being in contact with the liquid crystal layer. In a state where the adhesive layer is provided so as to surround the seal material, the adhesive layer contacts the seal material and also contacts the air. The sealing material is made of silicone-based resin or acrylate-based UV curable resin, and the adhesive layer is
It is composed of a cyanoacrylate adhesive or an epoxy adhesive.

[0012]

In a liquid crystal display device having a structure in which two substrates are adhered to each other by a sealing material, a thermosetting epoxy resin is currently mainly used as a material for the sealing material. As the curing agent for the epoxy resin, amines, imidazoles and hydrazides are used. Since the sealant comes into contact with the liquid crystal layer, the curing agent is eluted from the sealant into the liquid crystal layer and deteriorates the liquid crystal. Since the sealing material comes into contact with the air, depending on the water content in the air,
Due to the deterioration of the characteristics of the seal material, for example, the adhesiveness for holding the two substrates in a predetermined state deteriorates. In addition, the characteristics of the sealing material deteriorate with respect to changes in humidity and temperature inside the liquid crystal display device, which increases the air permeability and water permeability of the sealing material, allowing air and water to enter and leave the liquid crystal layer through the sealing material. Then, the characteristics of the liquid crystal may be deteriorated. As described above, the characteristics of the sealant and the liquid crystal are deteriorated, which causes a problem that the display quality of the liquid crystal display device, for example, the quality of the displayed image is deteriorated.

After the two substrates are bonded together, each substrate is pressed so that the distance between the two substrates becomes a predetermined value, and the two substrates are adhered to each other by the sealing material.
When the substrate is pressed, the sealing material bulges in the direction toward the liquid crystal layer and in the direction opposite to the direction toward the liquid crystal layer, and the dimensions change. Therefore, it is very important to control the dimensions of the sealing material with high accuracy. Have difficulty. Since it is very difficult to control the dimensions of the sealing material with high precision, the dimensional accuracy of the sealing material may deteriorate. When the dimensional accuracy of the sealing material deteriorates, the yield of the liquid crystal display element deteriorates, and the productivity of the liquid crystal display device decreases.

For example, when a plurality of liquid crystal display elements are formed using a panel which is larger than the substrate, the dimensional accuracy of the sealing material is poor. Therefore, when the panel is divided by bringing the cutting blade close to the sealing material, the sealing material is removed. There is a risk of accidental division. If the gap between the sealing material and the cutting blade is set sufficiently to prevent the sealing material from being accidentally divided, the number of liquid crystal display elements formed on the panel will be small, so the number of liquid crystal display elements obtained from the panel will be small. This also reduces the productivity of the liquid crystal display device.

Even in a liquid crystal display device having a structure in which two substrates are adhered to each other by a sealant and an adhesive layer, the sealant contacts the liquid crystal layer, so that the curing agent for the sealant elutes from the sealant to the liquid crystal layer. As a result, the characteristics of the liquid crystal are deteriorated. Since the adhesive layer comes into contact with air, the properties of the adhesive layer may be deteriorated by the moisture contained in the air. Deterioration of the adhesive layer may cause moisture and air to come into contact with the sealing material via the adhesive layer and deteriorate the characteristics of the sealing material. The deterioration of the characteristics of the sealing material and the adhesive layer causes a problem of deterioration in display quality of the liquid crystal display device.

When the two substrates are stuck together and adhered to each other, when the two substrates are pressed, the sealing material swells in a direction parallel to the direction from the sealing material to the liquid crystal layer, The dimension changes, and the adhesive layer bulges in a direction parallel to the direction from the sealing material to the adhesive layer, and the dimension changes. Since the dimensions of the sealing material and the adhesive layer change, it is very difficult to control the dimensions of the sealing material and the adhesive layer with high accuracy. Since it is very difficult to control each dimension of the sealing material and the adhesive layer with high precision, the dimensional accuracy of the sealing material and the adhesive layer may be deteriorated. Since the dimensional accuracy of the sealing material and the adhesive layer is deteriorated, the yield of the liquid crystal display element is deteriorated and the productivity of the liquid crystal display device is deteriorated.

Even when a plurality of liquid crystal display elements are formed using a panel larger than the substrate, the dimensional accuracy of the sealing material and the adhesive layer is poor. If the distance from the dividing blade is set sufficiently, the number of liquid crystal display elements formed on the panel is reduced. As a result, the number of liquid crystal display elements obtained from the panel is reduced, so that the productivity of the liquid crystal display device is reduced.

An object of the present invention is to provide a liquid crystal display device which can improve the display quality of the liquid crystal display device and the productivity of the liquid crystal display device.

[0019]

The present invention comprises two substrates, a sealing material for adhering the substrates to each other and forming an accommodation space sandwiched between the substrates, and a liquid crystal sealed in the accommodation space. A liquid crystal display device comprising: a liquid crystal layer; and a partition wall made of a water-impermeable material and surrounding the liquid crystal layer.

According to the invention, the two substrates are adhered to each other by the sealing material, and the accommodation space sandwiched between the two substrates is formed by the sealing material. Liquid crystal is enclosed in the accommodation space formed by the sealing material,
A liquid crystal layer is formed. A partition wall made of a water-impermeable material is provided so as to surround the liquid crystal layer. Since the liquid crystal layer is surrounded by the impermeable partition wall, it is possible to prevent water from entering and leaving the liquid crystal layer through the partition wall.
By preventing water from entering and leaving the liquid crystal layer, it is possible to prevent the characteristics of the liquid crystal forming the liquid crystal layer from deteriorating and to keep the liquid crystal layer in a suitable state.

Further, the present invention is characterized in that the partition wall has a plurality of partition wall portions provided at intervals in the inner and outer directions.

According to the present invention, the partition wall has a plurality of partition wall portions which are provided at intervals in the inner and outer directions. The plurality of partition portions are made of a water impermeable material and are provided so as to surround the liquid crystal layer. By providing a plurality of partition wall portions surrounding the liquid crystal layer at intervals in the inner and outer directions from the seal material toward the liquid crystal layer, the water impermeability can be further improved. By further improving the water impermeability, it is possible to reliably prevent water from entering and leaving the liquid crystal layer, prevent deterioration of liquid crystal characteristics, and hold the liquid crystal layer in a suitable state. .

Further, the present invention is characterized in that the partition wall is made of a material insoluble in liquid crystal and has an inner partition wall portion interposed between the sealing material and the liquid crystal layer.

According to the present invention, the partition wall is made of a material which is insoluble in liquid crystal, and has an inner partition wall portion interposed between the sealing material and the liquid crystal layer. By interposing the inner partition wall portion between the sealing material and the liquid crystal layer, it is possible to prevent the sealing material from contacting the liquid crystal layer.
Preventing the sealing material from coming into contact with the liquid crystal layer prevents substances that adversely affect the liquid crystal from eluting from the inner partition wall itself into the liquid crystal layer, and then from eluting from the sealing material into the liquid crystal layer. Thus, it is possible to prevent the characteristics of the liquid crystal from deteriorating. Further, since the partition wall is made of a material having water impermeability, by interposing the inner partition wall portion between the sealing material and the liquid crystal layer, it is possible to prevent water from entering and leaving the liquid crystal layer and deteriorate the characteristics of the liquid crystal. Can be prevented. By preventing the characteristics of the liquid crystal from deteriorating, the liquid crystal layer can be held in a suitable state. Since the inner partition wall portion is provided so as to be interposed between the sealing material and the liquid crystal layer, it is possible to prevent the sealing material from bulging in the direction from the sealing material to the liquid crystal layer when bonding the substrates to each other. Can be prevented.

Further, the present invention is characterized in that the partition wall has an outer partition wall portion which is made of an impermeable material and is provided so as to surround the sealing material.

According to the present invention, the partition wall is made of an impermeable material and has an outer partition wall portion surrounding the sealing material. An outer partition wall made of a material that is impermeable is provided around the seal material to prevent air from contacting the seal material and air from contacting the seal material through the outer partition wall portion. can do. Further, since the partition wall is made of a material having water impermeability, the outer partition wall portion is provided so as to surround the sealing material, so that moisture contained in the air is prevented from coming into contact with the sealing material through the outer partition wall portion. Can be prevented. By preventing the entry and exit of air and moisture by the outer partition wall portion, the sealing material can be protected from the air and moisture without being affected by the change in the state of humidity and temperature in the liquid crystal display device. By protecting the sealing material from air and moisture, the characteristics of the sealing material are deteriorated, for example, the adhesiveness necessary for maintaining the position of each substrate and bonding even if an impact is applied is reduced. This can be prevented and the sealing material can be held in a suitable state. Since the outer partition wall portion is provided so as to surround the sealing material, it is possible to prevent the sealing material from bulging in the direction from the liquid crystal layer toward the sealing material when the substrates are bonded to each other.

Further, according to the present invention, the partition wall has an inner partition wall portion made of a material insoluble in liquid crystal and an outer partition wall portion made of a material having impermeable property, and the sealing material is
It is characterized in that it is provided between the respective partition portions.

According to the present invention, the partition wall has an inner partition wall portion made of a material which is insoluble in liquid crystal and an outer partition wall portion made of a material having impermeable property. A sealing material is provided between the inner partition wall portion and the outer partition wall portion.
By interposing the inner partition wall portion between the seal material and the liquid crystal layer, the above-mentioned substance that adversely affects the liquid crystal is prevented from eluting from the inner partition wall portion itself into the liquid crystal layer, and the seal material is also formed. It is possible to prevent the liquid crystal from eluting into the liquid crystal layer and prevent the characteristics of the liquid crystal from deteriorating. Furthermore, since the partition wall is made of a material having impermeable property,
By interposing the inner partition wall portion between the seal material and the liquid crystal layer, it is possible to prevent water from entering and leaving the liquid crystal layer as described above, and prevent deterioration of the characteristics of the liquid crystal. By interposing the inner partition wall portion between the sealing material and the liquid crystal layer to prevent the characteristics of the liquid crystal layer from being adversely affected, it is possible to prevent the characteristics of the liquid crystal from deteriorating. By preventing the characteristics of the liquid crystal from deteriorating, the liquid crystal layer can be held in a suitable state.

Since the outer partition wall portion made of a material having an air-impermeable property is provided so as to surround the sealing material, the air comes into contact with the sealing material as described above, and the air flows through the outer partition wall portion through the sealing material. It is possible to prevent contact with. Further, since the partition wall is made of a material having water impermeability, the outer partition wall portion is provided so as to surround the sealing material, thereby preventing moisture contained in the air from adhering to the sealing material. By preventing air and moisture from entering and exiting by the outer partition wall portion, the sealing material can be protected from air and moisture without being affected by the change in the state of humidity and temperature in the liquid crystal display device as described above. By protecting the sealing material from air and moisture, it is possible to prevent the characteristics of the sealing material from deteriorating and hold the sealing material in a suitable state.

Since the sealing material is provided between the inner partition wall portion and the outer partition wall portion, when the substrates are adhered to each other, the sealing material is prevented from being compressed more than necessary in the direction perpendicular to the inner and outer directions. Thus, it is possible to prevent the sealing material from bulging inward and outward. The inward and outward directions are the directions perpendicular to the thickness direction of each substrate when the two substrates are provided in parallel to each other, and the direction from the liquid crystal layer to the seal material and the direction from the seal material to the liquid crystal layer. Including and
By preventing the sealing material from bulging inward and outward, the dimension of the sealing material in the inward and outward directions and the dimension in the direction perpendicular to the inward and outward directions can be controlled so as to have predetermined dimensions. The dimensional accuracy of the material can be improved.

Further, the present invention is characterized in that the partition wall is made of a negative type photosensitive resin. According to the present invention, the partition wall is made of a negative photosensitive resin. Since the negative type photosensitive resin is insoluble in the solution in which the photosensitive resin is dissolved, only the light-irradiated portion becomes insoluble. Therefore, the desired partition wall is formed by irradiating light in accordance with the shape of the partition wall. be able to. By using the negative type photosensitive resin as the material of the partition wall, the thickness of the partition wall in the inner and outer directions can be made as thin as possible, and the partition wall can be precisely formed.
When a liquid crystal display device is driven by using a negative photosensitive resin as the material of the partition wall, the characteristics of the partition wall are not deteriorated by the light even when the partition wall is irradiated with light from the outside, and thus the partition wall is suitable. It can be held in a stable state.

Further, the present invention is characterized in that the height of the partition wall is the same as the cell gap. According to the present invention, the partition is formed so that its height is the same as the cell gap indicating the distance between the two substrates. Since the cell gap is set by the partition wall, the two substrates can be easily positioned without separately providing a spacer for uniformly maintaining the cell gap. Since the height of the partition wall is the same as the cell gap, by forming the sealing material based on the height of the partition wall, it is possible to prevent the sealing material from bulging inward and outward. Can be improved. When the sealing material is provided between the inner partition wall portion and the outer partition wall portion of the partition wall having the same cell gap, the characteristics of the liquid crystal and the sealing material are prevented from deteriorating as described above, and the liquid crystal layer and the sealing material are provided. Can be held in a suitable state.

[0033]

1 shows a liquid crystal display element 2 included in a liquid crystal display device 1 according to an embodiment of the present invention.
It is sectional drawing seen from the cutting plane line S1-S1 of FIG. Figure 2
It is sectional drawing which expands and shows a part of liquid crystal display element 2 seen from the cutting plane line S2-S2 of FIG. The liquid crystal display device 1 is a device for displaying various images including still images and moving images, and includes a liquid crystal display element 2 for displaying images. The liquid crystal display element 2 includes a first substrate 3, a second substrate 4, a sealing material 5, a liquid crystal layer 6, a partition wall 7, a first alignment film 8, a second alignment film 9, a first transparent electrode 10, and a second transparent electrode 11. And the inlet sealing material 12. The liquid crystal display device 1 according to the present embodiment is specifically a thin film transistor (abbreviated as TF) which is a three-terminal element.
The active matrix driving method using T) as a switching element is adopted.

The first substrate 3 and the second substrate 4 have a predetermined thickness, and at least one of the first substrate 3 and the second substrate 4 is translucent. The 1st board | substrate 3 and the 2nd board | substrate 4 are provided in parallel and mutually, at intervals. The thickness direction of the second substrate 4 is parallel to the thickness direction of the first substrate 3 in a state in which the first substrate 3 and the second substrate 4 are provided in parallel to each other with a gap. The first substrate 3 and the second substrate 4 have insulating properties, and the first substrate 3 and the second substrate 4 respectively.
At least one of the substrates 4 has a translucent material,
It consists of glass, for example.

The sealing material 5 adheres the first substrate 3 and the second substrate 4 to each other, and forms the accommodation space 13 sandwiched between the first substrate 3 and the second substrate 4. The sealing material 5 is provided between the first substrate 3 and the second substrate 4. Seal material 5
Is provided between the first substrate 3 and the second substrate 4,
With respect to the sealing material 5, assuming that the width direction is a direction parallel to each thickness direction of the first and second substrates 3 and 4, the sealing material 5 is the sealing material 5 when viewed from one side in the thickness direction of the first substrate 3. 5 has a through hole having a rectangular cross section in the width direction. In one of the inner and outer directions, a part of the sealing material 5 on one side in the one direction is opened. The inward / outward direction is a direction perpendicular to the thickness direction of the first substrate 3 and the second substrate 4 in a state in which the first substrate 3 and the second substrate 4 are provided in parallel with each other with a space therebetween. , A direction from the liquid crystal layer 6 to the seal material 5 and a direction from the seal material 5 to the liquid crystal layer 6.
The liquid crystal layer 6 is provided between the first substrate 3 and the second substrate 4. The liquid crystal layer 6 is formed of liquid crystal enclosed in the housing space 13 sandwiched between the first substrate 3 and the second substrate 4, and is surrounded by the sealing material 5.

The partition wall 7 is made of a material having water impermeability and is provided so as to surround the liquid crystal layer 6. The partition wall 7 has a plurality of partition wall portions provided at intervals in the inner and outer directions.
The partition wall 7 is formed of, for example, a polymer material having a large molecular weight. In the present embodiment, the partition wall 7 has an inner partition wall portion 7a and an outer partition wall portion 7b which are partition wall portions. The heights of the partition walls 7, for example, the heights of the inner partition wall portion 7a and the outer partition wall portion 7b are provided to be the same as the cell gap. The height of the partition 7 is a dimension in a direction parallel to each thickness direction of the first and second substrates 3 and 4 when the partition 7 is provided between the first substrate 3 and the second substrate 4. is there.
The cell gap is defined by the liquid crystal layer 6, the sealing material 5, and the partition wall 7.
Is a distance between the first substrate 3 and the second substrate 4 in a state in which it is provided between the first substrate 3 and the second substrate 4.

The inner partition wall portion 7a is made of a material which is insoluble in liquid crystal. The inner partition wall portion 7a has a through hole having a rectangular cross section perpendicular to the width direction of the inner partition wall portion 7a when viewed from one side in the thickness direction of the first substrate 3.
In the one direction of the inner and outer directions, a part of the inner partition wall portion 7a on one side in the one direction is opened. Inner partition 7a
Is interposed between the sealing material 5 and the liquid crystal layer 6,
Is surrounded by the sealing material 5.

The outer partition wall portion 7b is made of an impermeable material. The outer partition wall portion 7b has a through hole having a rectangular cross section perpendicular to the width direction of the outer partition wall portion 7b when viewed from one side in the thickness direction of the first substrate 3. In the one direction of the inner and outer directions, a part of the outer partition wall portion 7b on one side of the one direction is opened. The outer partition wall portion 7b is provided so as to surround the sealing material 5, the liquid crystal layer 6, and the inner partition wall portion 7a. In the sealing material 5, the inner partition wall portion 7a, and the outer partition wall portion 7b, the open portions are provided so as to overlap each other when viewed from the one direction, and serve as injection ports 14 for injecting liquid crystal.

The above-mentioned sealing material 5 is provided between the inner partition wall portion 7a and the outer partition wall portion 7b, and the inner partition wall portion 7a.
And is surrounded by the outer partition wall portion 7b. Since the inner partition wall portion 7a is interposed between the seal material 5 and the liquid crystal layer 6, the inner partition wall portion 7a prevents the surface of the seal material 5 on one side in the inner and outer directions from coming into contact with the liquid crystal layer 6. Since the outer partition wall portion 7b surrounds the seal material 5, the outer partition wall portion 7b prevents the surface of the seal material 5 on the other side in the inner / outer direction from coming into contact with air.

The first alignment film 8 is provided between the first substrate 3 and the liquid crystal layer 6 so as to be closest to the liquid crystal layer 6 among the components provided between the first substrate 3 and the liquid crystal layer 6. It is provided. The first alignment film 8 regulates the tilt angle and the alignment angle of the liquid crystal molecules so that the liquid crystal molecules of the liquid crystal layer 6 have the interfacial regularity.
A rubbing process is performed on the surface of the first alignment film 8 on one side in the thickness direction, in other words, the surface facing the liquid crystal layer 6.

The second alignment film 9 is provided between the first substrate 3 and the liquid crystal layer 6 so as to be closest to the liquid crystal layer 6 among the components provided between the second substrate 4 and the liquid crystal layer 6. It is provided. The second alignment film 9 regulates the tilt angle and the alignment angle of the liquid crystal molecules so that the liquid crystal molecules of the liquid crystal layer 6 have the interfacial regularity.
A rubbing treatment is performed on the surface of the second alignment film 9 on one side in the thickness direction, in other words, the surface facing the liquid crystal layer 6. By the rubbing treatment performed on the first alignment film 8 and the second alignment film 9, the liquid crystal molecules are aligned in a predetermined direction.

The first transparent electrode 10 is made of indium tin oxide (abbreviated as ITO) and has translucency. The first transparent electrode 10 is provided between the first substrate 3 and the liquid crystal layer 6. Specifically, the first transparent electrode 10 is
It is provided on one surface in the thickness direction of the first substrate 3 facing the second substrate 4, and is provided for each pixel in a region where an image is displayed. First transparent electrode 10 provided for each pixel
A thin film transistor is provided in each. In the present embodiment, the illustrated first transparent electrode 10 is represented by a single plate-like electrode having a predetermined thickness for simplification.

The second transparent electrode 11 is a plurality of strip-shaped electrodes made of indium tin oxide and has a light-transmitting property. The second transparent electrode 11 is provided on the surface on one side in the thickness direction of the second substrate 4 so as to face the first transparent electrode 10 with the liquid crystal layer 6 in between. Specifically, the second transparent electrode 11 is
It is provided on the surface of the second substrate 4 on one side in the thickness direction such that the longitudinal directions thereof are parallel to each other and a predetermined space is provided between two adjacent second transparent electrodes 11.

First substrate 3 on which the first transparent electrode 10 is provided
And the second substrate 4 on which the second transparent electrode 11 is provided are parallel to each other and spaced apart from each other.
When viewed in the thickness direction, the portions where the first transparent electrode 10 and the second transparent electrode 11 overlap each other become pixels of the liquid crystal display device 1.

The injection port sealing material 12 contains a liquid crystal accommodating space 13
After being injected into the container, the injection port 14 is sealed so that the liquid crystal does not leak from the accommodation space 13. In the inlet sealing material 12,
A material that does not deteriorate the characteristics of the liquid crystal is used.

For example, when the liquid crystal display element 2 adopts a simple matrix driving method, a plurality of strip-shaped first transparent electrodes 10 are provided on the first substrate 3, and a plurality of strip-shaped second transparent electrodes 11 are provided. Is provided on the second substrate 4, and the first and second substrates 3 and 4 are provided so as to face each other with the liquid crystal layer 6 in between. With the first substrate 3 and the second substrate 4 facing each other,
The first transparent electrode 10 and the second transparent electrode 11 are arranged such that the longitudinal direction of the first transparent electrode 10 and the longitudinal direction of the second transparent electrode 11 intersect perpendicularly when viewed from the thickness direction of the first substrate 3. And are provided to form a matrix. When viewed from the thickness direction of the first substrate 3, the first transparent electrode 10 and the second transparent electrode 1
The portion where 1 and 1 overlap is set as a pixel.

When the liquid crystal display element 2 adopts the display method based on the vertical electric field method, the liquid crystal layer 6 is sandwiched between the first substrate 3 and the second substrate 4 having a light-transmitting property.
The alignment state of the liquid crystal molecules is changed by the voltage applied between the first transparent electrode 10 and the second transparent electrode 11.
By changing the alignment state of the liquid crystal molecules, for example, the light transmitted through the first transparent electrode 10 and incident on the liquid crystal layer 6 is modulated to display an image.

When the liquid crystal display element 2 adopts the display method based on the horizontal electric field method, for example, the second transparent electrode 11 is used.
Is provided on the first substrate 3 in addition to the first transparent electrode 10, and the first transparent electrode 10 and the second transparent electrode 11 are provided with a predetermined space therebetween. An electric field in a direction substantially parallel to the surface on one side of the direction is generated to change the alignment state of the liquid crystal molecules. Substantially parallel is
Including parallel. By changing the alignment state of the liquid crystal molecules, light incident on the liquid crystal layer 6 from between the two electrodes is modulated to display an image.

The liquid crystal display device also includes a drive circuit, a polarizing plate and various optical sheets such as color filters. For example, when the liquid crystal display element 2 is a transmissive type,
Also, the second substrates 3 and 4 both have translucency, and the liquid crystal display element 2 is provided with a backlight assembly that is a light source and a metal frame, in other words, a metal shield case. When the liquid crystal display element 2 is of a reflective type, the backlight assembly is not used, and an image is visually displayed by reflection of light from the outside of the liquid crystal display device 1.

The liquid crystal display element 2 further includes a polarizing plate and a tab (Table Automated Bonding: TAB) which are not shown. The polarizing plate extracts only light having a predetermined vibration direction. The polarizing plate is provided on, for example, the surface of the first substrate 3 on the other side in the thickness direction and the surface of the second substrate 4 on the other side in the thickness direction. The tab is a printed circuit board including a liquid crystal driving integrated circuit for applying a voltage and a wiring between the first transparent electrode 10 and the second transparent electrode 11, and is connected to a wiring connected to the thin film transistor.

In the liquid crystal display element 2, the voltage applied between the first transparent electrode 10 and the second transparent electrode 11 by the liquid crystal driving integrated circuit included in the tab is controlled by the thin film transistor, so that the liquid crystal layer is formed. Various images are displayed by changing the alignment state of the liquid crystal molecules of 6. For example, it is assumed that the vibration direction of light by the polarizing plate provided on the first substrate 3 and the vibration direction of light by the polarizing plate provided on the second substrate 4 are perpendicular to each other.

In the state where no voltage is applied between the first transparent electrode 10 and the second transparent electrode 11, the alignment state of the liquid crystal molecules does not change. Therefore, for example, the first substrate 3 is irradiated with a light source and the liquid crystal layer 6 is irradiated. The transmitted light passes through the polarizing plate provided on the second substrate 4. When a voltage is applied between the first transparent electrode 10 and the second transparent electrode 11, the alignment of the liquid crystal molecules is arranged so that the long axis direction of the liquid crystal molecules is parallel to the thickness direction of the first substrate 3. The state changes. When the alignment state of the liquid crystal molecules changes as described above, the light emitted from the light source to the first substrate 3 and transmitted through the liquid crystal layer 6 is blocked by the polarizing plate provided on the second substrate 4. The voltage applied between the first transparent electrode 10 and the second transparent electrode 11 is controlled for each pixel. Various images are displayed on the liquid crystal display element 2 based on the light that has passed through the polarizing plate provided on the second substrate 4.

FIG. 3 is a front view showing the liquid crystal display element 2 in a state where the outer partition wall portion 7b and the first transparent electrode 10 are provided on the first panel 15. FIG. 4 is a cross-sectional view showing the liquid crystal display element 2 taken along the section line S4-S4 in FIG. A plurality of liquid crystal display elements 2 are formed using the first panel 15 and the second panel 16 which are larger than the first substrate 3 and the second substrate 4. The first panel 15 includes the first substrate 3
The first substrate 3 is formed by dividing the first panel 15 from the same material as the above. Second panel 16
Is made of the same material as the second substrate 4, and the second panel 16
The second substrate 4 is formed by dividing the substrate.

In this embodiment, four liquid crystal display elements 2 are provided.
So as to obtain the sealing material 5, the liquid crystal layer 6, the inner partition wall portion 7a, the outer partition wall portion 7b, the first alignment film 8, the second alignment film 9, the first transparent electrode 10, the second transparent electrode 11 and the injection port. The sealing material 12 is provided between the first panel 15 and the second panel 16, respectively.

The first panel 15 is provided with a sealing material 5, a liquid crystal layer 6, a partition wall 7, a first alignment film 8, a first transparent electrode 10 and an injection port sealing material 12, respectively. Second panel 16
The second alignment film 9 and the second transparent electrode 11 are provided in each. After bonding the second panel 16 and the first panel 15 to each other, the first panel 15 and the second panel 16 are separated from each other, whereby four liquid crystal display elements 2 are obtained.

Indium tin oxide is applied to the entire surface of the first panel 15 on one side in the thickness direction to form a film. The applied indium tin oxide is patterned so that the first transparent electrode 10 provided for each pixel has a predetermined shape, for example, a substantially rectangular shape. By patterning the applied indium tin oxide, the first transparent electrode 10 is formed on the surface of the first panel 15 on one side in the thickness direction. For example, the first transparent electrode 10
Is formed so that its dimension in the thickness direction is about 100 nm.

Indium tin oxide is applied to the entire surface of the second panel 16 on the one side in the thickness direction to form a film. The applied indium tin oxide is the second transparent electrode 1
The second transparent electrode 11 is formed on the surface of the second panel 16 on one side in the thickness direction by patterning 1 so as to have a band shape. The second transparent electrode 11 is formed such that its dimension in the thickness direction has a predetermined dimension, for example, the same dimension as the first transparent electrode 10.

After the first transparent electrode 10 is formed on the first panel 15, at least one of the inner partition wall portion 7a and the outer partition wall portion 7b is formed on the first panel 15. In the present embodiment, first, the inner partition wall portion 7a is formed on the first panel 15, and then the outer partition wall portion 7b is formed on the first panel 15. When forming the inner partition wall portion 7a and the outer partition wall portion 7b on the first panel 15, first, the outer partition wall portion 7b is formed.
May be formed, and then the inner partition wall portion 7a may be formed.
The inner partition wall portion 7a and the outer partition wall portion 7b are formed using, for example, a negative photosensitive resin. The negative type photosensitive resin is a resin in which the portion irradiated with light has a significantly reduced solubility in a solution, for example, a developing solution. An acrylic resin is used as the negative photosensitive resin, for example.

The negative photosensitive resin is applied by spin coating to the entire surface of the first panel 15 on one side in the thickness direction so that the dimension in the thickness direction is uniform. Spin coating is a method in which the material is applied to the entire surface of the object by rotating the object at a high speed so that the dimension of the material dropped on the surface of the object becomes uniform in the thickness direction. 1st panel 1
A film made of a negative-type photosensitive resin is formed on one surface in the thickness direction of 5 so that the dimension in the thickness direction is, for example, about 5 μm.

After the negative photosensitive resin is applied to the first panel 15, the negative photosensitive resin applied to the first panel 15 is pre-baked. Pre-baking is a drying process and a heating process before the exposure process. For example, the negative photosensitive resin applied to the first panel 15 is prebaked at about 130 degrees for about 120 seconds.

The negative type photosensitive resin applied to the first panel 15 is formed by a stepper method using a photomask patterned so that light is irradiated only to the region where the inner partition wall portion 7a is to be formed. It is exposed. The stepper method is a method in which an object to be exposed is exposed for each predetermined area. In the exposure processing, for example, ultraviolet rays (abbreviated to UV) are applied to the negative photosensitive resin applied to the first panel 15.

After being exposed, the negative photosensitive resin applied to the first panel 15 is developed with a developing solution for a predetermined time. The negative photosensitive resin in the portion irradiated with light, in other words, the area where the outer partition wall portion 7b is to be formed by the developing treatment has a significantly reduced solubility in the developing solution, and therefore is dissolved in the developing solution. The part that was not irradiated with light was dissolved by the developer. As the developing solution, for example, a CD developing solution manufactured by Fuji Ohrin Co., Ltd. is used.

After the development processing, the negative photosensitive resin applied to the first panel 15 is washed and dried. After that, the negative photosensitive resin applied to the first panel 15 is post-baked. Post-baking is a drying process and a heating process after the developing process. For example, the first panel 15
The negative photosensitive resin applied to the above is post-baked at 230 degrees for about 1 hour. The negative photosensitive resin applied to the first panel 15 is post-baked to cure the negative photosensitive resin and form the outer partition wall portion 7b. For example, the outer partition wall portion 7b
Is a dimension in a direction parallel to the thickness direction of the first panel 15, in other words, the height of the outer partition wall portion 7b is about 4.8 μm.
m is formed.

FIG. 5 is a front view showing the liquid crystal display element 2 in a state where the inner partition wall portion 7a is further provided on the first panel 15 on which the outer partition wall portion 7b and the first transparent electrode 10 are provided. FIG. 6 is a cross-sectional view showing the liquid crystal display element 2 taken along the section line S6-S6 of FIG. Outer partition wall part 7
After the b is formed on the first panel 15, the inner partition wall portion 7a
Is formed. The negative photosensitive resin is applied by spin coating to the entire surface of the first panel 15 on one side in the thickness direction so that the dimension in the thickness direction is uniform. As described above, the film made of the negative photosensitive resin is formed so that the dimension in the thickness direction is about 5 μm.

After the negative photosensitive resin is applied to the first panel 15, the negative photosensitive resin applied to the first panel 15 is pre-baked. Only the region where the inner partition wall portion 7a is to be formed is exposed by a stepper method using a photomask patterned so that light is irradiated. After being exposed, the negative photosensitive resin applied to the first panel 15 is developed using a developing solution for a predetermined time.

After the development processing, the first panel 15 is washed and dried. Then, the first panel 15 is post-baked. The negative photosensitive resin applied to the first panel 15 is post-baked, whereby the negative photosensitive resin is cured and the inner partition wall portion 7a is formed. For example, the inner partition wall portion 7a is formed such that its dimension in the thickness direction, in other words, the height of the inner partition wall portion 7a is about 4.8 μm. As described above, the inner partition wall portion 7a and the outer partition wall portion 7b having a height of about 4.8 μm are provided on the first panel 15 at intervals in the inner and outer directions.

FIG. 7 shows a first panel 1 provided with an inner partition wall portion 7a, an outer partition wall portion 7b and a first transparent electrode 10.
5 is a front view showing the liquid crystal display element 2 in a state in which the first alignment film 8 is further provided in FIG. FIG. 8 shows the section line S of FIG.
It is sectional drawing which shows the liquid crystal display element 2 seen from 8-S8.
After the inner partition wall portion 7 a, the outer partition wall portion 7 b and the first transparent electrode 10 are provided on the first panel 15, the first alignment film 8 is provided on the first panel 15. The alignment film material is applied to the region surrounded by the inner partition wall portion 7a by a roll printing method so that the film thickness becomes about 50 nm, for example. Polyimide, for example, is used as the alignment film material of the first alignment film 8.

The alignment film material applied to the first panel 15 is baked at about 200 ° C. to cure the alignment film material and form the first alignment film 8. The surface of the first alignment film 8 on one side in the thickness direction is subjected to a rubbing process using, for example, cloth.

In the second panel 16 provided with the second transparent electrode 11, the second alignment film 9 is formed by applying the alignment film material to a predetermined region of the second panel 16 and baking it. It is formed by curing the material. The predetermined area of the second panel 16 is defined by the first panel 15 and the second panel 1.
6 is a region which is surrounded by the inner partition wall portion 7a when it is bonded. As the alignment film material of the second alignment film 9, for example, polyimide is used. A rubbing process is performed on the surface of the second alignment film 9 on one side in the thickness direction.

FIG. 9 shows a liquid crystal display in which the sealing material 5 is further provided on the first panel 15 provided with the inner partition wall portion 7a, the outer partition wall portion 7b, the first alignment film 8 and the first transparent electrode 10. It is a front view which shows the element 2. FIG. 10 is a cross-sectional view showing the liquid crystal display element 2 taken along the section line S10-S10 in FIG. After the first alignment film 8 is provided on the first panel 15, the sealing material 5 is provided on the first panel 15. The seal material 5 is dropped and applied between the inner partition wall portion 7a and the outer partition wall portion 7b provided on the first panel 15 by a dispenser. The dispenser is a device that discharges a material to be dropped from a thin nozzle by a gas pressure controlled to a predetermined value and applies the material. Seal material 5
For example, a material that is cured by ultraviolet rays is used.

The application amount of the sealing material 5 is set so that the upper end surface of the sealing material 5 is included in one plane including at least the upper end surface of the inner partition wall portion 7a and the upper end surface of the outer partition wall portion. Specifically, the inner partition wall portion 7a and the outer partition wall portion 7b
The sealing material 5 is formed in a state where the volume of the space sandwiched between the and is equal to the volume of the sealing material 5, or the volume of the sealing material 5 is slightly larger than the volume of the space.
The upper end surface of the sealing material 5, the upper end surface of the inner partition wall portion 7a, and the upper end surface of the outer partition wall portion 7b are in contact with the second panel 16 in a state where the first panel 15 and the second panel 16 are bonded and adhered to each other. The surface.

After the seal material 5 is applied, the seal material 5 is cured by irradiating the applied seal material 5 with ultraviolet rays. Even if the sealing material 5 is cured by being irradiated with ultraviolet rays, the first panel 15 and the second panel 1 which are bonded to each other.
6 and 7 have sufficient adhesiveness to prevent displacement due to, for example, shock and vibration.

FIG. 11 shows the first panel 15 and the second panel 1.
The liquid crystal display element 2 in the state where 6 and 6 are attached is shown in FIG.
It is sectional drawing seen from the cutting plane line S11-S11 of FIG. Figure 1
2 is a sectional view showing the liquid crystal display element 2 in an enlarged manner as seen from the section line S12-S12 in FIG. First panel 15
The second panel 16 and the second panel 16 are attached to each other in parallel with high precision with a space. First facing the second panel 16
On the surface of the panel 15, the sealing material 5, the inner partition wall portion 7a,
Outer partition wall portion 7b, first alignment film 8 and first transparent electrode 1
0 is provided. The second alignment film 9 and the second transparent electrode 11 are provided on the surface of the second panel 16 facing the first panel 15.

The first panel 15 and the second panel 16 are pressed so that the distance between the first panel 15 and the second panel 16 becomes a predetermined value. The sealing material 5 adheres to each other. First
With the panel 15 and the second panel 16 bonded to each other, the distance between the first panel 15 and the second panel 16 is the same as the height of the inner partition wall portion 7a and the outer partition wall portion 7b. Since the first panel 15 and the second panel 16 are positioned by the inner partition wall portion 7a and the outer partition wall portion 7b, the distance between the first panel 15 and the second panel 16 is set to the inner partition wall portion 7a and the outer partition wall portion 7b. Is held evenly by. First panel 15 and second panel 1
The space between the first substrate 3 and the second substrate 4 is the same as the cell gap.

The first panel 15 and the second panel 16 are
The inner partition wall portion 7a is provided between the seal material 5 and the liquid crystal layer 6, and the outer partition wall portion 7b is provided so as to surround the seal material 5 while being bonded to each other by the seal material 5. The inner wall portion 7a prevents the sealing material 5 from contacting the liquid crystal layer 6 on one surface in the inner-outer direction.
And the second panel 16. The sealing material 5 is
The outer partition wall portion 7b prevents the surface on the other side in the inward / outward direction from coming into contact with air, so that the first panel 15 and the second panel 16
It is provided between and.

FIG. 13 is a cross-sectional view of the liquid crystal display element 2 in a state where the first panel 15 and the second panel 16 are divided, as seen from the section line S13-S13 in FIG. 14
FIG. 14 is an enlarged cross-sectional view of the liquid crystal display element 2 viewed from the section line S14-S14 of FIG. After the first panel 15 and the second panel 16 are bonded together, the liquid crystal is injected into the inlet 1.
The liquid crystal layer 6 is formed by enclosing the liquid crystal layer 4 in the accommodation space 13.

After the liquid crystal is sealed in the accommodation space 13, the injection port 14 is sealed by the injection port sealing material 12. After the inlet 14 is sealed, the first panel 15 and the second panel 16 are separated. First panel 15 and second panel 1
By dividing 6 into four, four liquid crystal display elements 2 are obtained. A polarizing plate and a tab are respectively provided on the obtained liquid crystal display element 2 to complete the liquid crystal display element 2.

According to the present embodiment, the partition wall 7 is made of a water impermeable material, is provided so as to surround the liquid crystal layer 6, and has a plurality of partition wall portions. Since the partition wall 7 has water impermeability and is provided so as to surround the liquid crystal layer 6, it is possible to prevent water from entering and leaving the liquid crystal layer 6. Further, the plurality of partition wall portions can further improve the water impermeability by the partition wall 7 and prevent water from entering and leaving the liquid crystal layer 6. By preventing water from entering and leaving the liquid crystal layer 6 by the partition wall 7, it is possible to prevent the characteristics of the liquid crystal forming the liquid crystal layer 6 from being deteriorated. Further, by using a polymer material as the material of the partition wall 7, the partition wall 7 can be stably supported against changes in the surrounding environment.
It is possible to exhibit the properties required for, for example, water impermeability.

The partition wall 7 includes an inner partition wall portion 7a and an outer partition wall portion 7b made of a material insoluble in liquid crystal.
And an outer partition wall portion 7b made of an impermeable material. The sealing material 5 is provided between the inner partition wall portion 7a and the outer partition wall portion 7b which are spaced in the inner and outer directions.

The inner partition wall portion 7a is composed of the sealing material 5 and the liquid crystal layer 6.
It is possible to prevent the sealing material 5 from coming into contact with the liquid crystal layer 6 by interposing the sealing material 5 with the liquid crystal layer 6. Seal material 5
By preventing the liquid from coming into contact with the liquid crystal layer 6, it is possible to prevent the substance adversely affecting the liquid crystal from being eluted from the inner partition wall portion 7a and also from being eluted from the sealing material 5 to the liquid crystal layer 6. be able to. Further, the water impermeable inner partition wall portion 7a can prevent water from entering and leaving the liquid crystal layer 6 through the inner partition wall portion 7a.

By interposing the inner partition wall portion 7a between the seal material 5 and the liquid crystal layer 6 as described above, the liquid crystal layer 6 is protected from substances and moisture that adversely affect the liquid crystal, and the characteristics of the liquid crystal are deteriorated. It can be prevented. By preventing the characteristics of the liquid crystal from deteriorating, the liquid crystal layer 6 can be held in a suitable state.

Further, the outer partition wall portion 7b having an air-impermeable property.
However, by being provided so as to surround the sealing material 5, it is possible to prevent air from coming into contact with the sealing material 5 and air from coming into contact with the sealing material 5 via the outer partition wall portion 7b. Further, the outer partition wall portion 7b having water impermeability
As a result, the water content of the sealing material 5 passes through the outer partition wall portion 7b.
It is possible to prevent access to and from.

Since the outer partition wall portion 7b is provided so as to surround the sealing material as described above, it is possible to protect the sealing material 5 from air and moisture and prevent the characteristics of the sealing material 5 from deteriorating. it can. By preventing the characteristics of the sealing material 5 from deteriorating, the sealing material 5 can be held in a suitable state.

As described above, the inner partition wall portion 7a is the liquid crystal layer 6
The sealing material 5 is provided between the inner partition wall portion 7a and the outer partition wall portion 7b so that the sealing material 5 and the liquid crystal layer 6 are kept airtight.
Further, it is possible to prevent the characteristics of the liquid crystal from being deteriorated. By preventing the characteristics of the sealing material 5 and the liquid crystal from deteriorating, the characteristics of the sealing material 5 and the liquid crystal layer 6 can be maintained in a suitable state.

By providing the seal material 5 between the inner partition wall portion 7a and the outer partition wall portion 7b, the seal material 5 is formed.
Can be prevented from being compressed more than necessary in the direction perpendicular to the inward / outward direction, and the sealing material 5 can be prevented from expanding inward / outward. By preventing the sealing material 5 from bulging inward and outward, it is possible to control the dimension of the sealing material 5 in the inward and outward directions and the dimension in the direction perpendicular to the inward and outward directions to be predetermined dimensions. Therefore, the dimensional accuracy of the sealing material 5 can be improved. Seal material 5
By improving the dimensional accuracy of the liquid crystal display element 2
Yield can be improved.

Further, by improving the dimensional accuracy of the sealing material 5, the first panel 15 and the second panel 1 which are bonded together are bonded.
Since the dividing blade can be brought as close as possible to the sealing material 5 when dividing 6 and 6, the first panel 15 and the second panel 16 can be effectively used. Since the first panel 15 and the second panel 16 can be effectively used, even if the panel size is the same as the panel size in the liquid crystal display device of the related art, a larger amount of liquid crystal display than the conventional liquid crystal display The element 2 can be formed.
By improving the dimensional accuracy of the sealing material 5, the yield of the liquid crystal display device 1 can be improved, and more liquid crystal display elements 2 can be formed as compared with the related art.

By using the negative type photosensitive resin as the material of the inner partition wall portion 7a and the outer partition wall portion 7b, the thickness of the inner partition wall portion 7a and the outer partition wall portion 7b in the inner and outer directions can be made as thin as possible. The inner partition wall portion 7a and the outer partition wall portion 7b can be precisely formed.
By using the negative type photosensitive resin, even if the light from the outside, for example, the light from the light source is applied to the inner partition wall portion 7a and the outer partition wall portion 7b, the characteristics of the inner partition wall portion 7a and the outer partition wall portion 7b are It is possible to prevent deterioration due to light.

Inner partition wall portion 7a and outer partition wall portion 7b
It is possible to maintain the characteristics of the inner partition wall portion 7a and the outer partition wall portion 7b in a suitable state by preventing the characteristic of (2) from being deteriorated by light from the outside. By maintaining the characteristics of the inner partition wall portion 7a and the outer partition wall portion 7b in a suitable state, it is possible to prevent the characteristics of the sealing material 5 and the liquid crystal from deteriorating and to maintain the sealing material 5 and the liquid crystal layer 6 in a suitable state. can do.

Further, since the height of the inner partition wall portion 7a and the height of the outer partition wall portion 7b are the same as the cell gap indicating the distance between the first substrate 3 and the second substrate 4, there is no need to separately provide a spacer. Therefore, the first substrate 3 and the second substrate 4 can be accurately positioned to maintain the cell gap uniformly. Since the cell gap can be uniformly maintained by the inner partition wall portion 7a and the outer partition wall portion 7b, the yield of the liquid crystal display device 1 can be improved.

When the volume of the space between the inner partition wall portion 7a and the outer partition wall portion 7b is the same as the volume of the sealing material 5, or the volume of the sealing material 5 is slightly larger than the volume of the space. The sealing material 5 is formed.

For example, when the coating amount of the sealing material 5 is larger than the predetermined amount, the first panel 15 and the second panel 16
When the and are bonded, the inner partition wall portion 7a and the second panel 1
6 and between the outer partition wall portion 7b and the second panel 16, there is a risk that the seal material 5 will come into contact with the liquid crystal layer 6 and the air. The contact of the sealing material 5 with the liquid crystal layer 6 deteriorates the characteristics of the liquid crystal forming the liquid crystal layer 6, and the contact of the sealing material 5 with air deteriorates the characteristics of the sealing material 5. Also, the inner partition wall portion 7
a between the second panel 16 and the outer partition wall portion 7b and the second
By interposing the sealing material 5 with the panel 16, the cell gap may be affected. When the coating amount of the sealing material 5 is larger than a predetermined amount, the roles of the inner partition wall portion 7a and the outer partition wall portion 7b, for example, protecting the sealing material 5 and the liquid crystal layer 6, and ensuring that the characteristics of the sealing material 5 and the liquid crystal are It becomes impossible to sufficiently fulfill the role of preventing deterioration.

When the coating amount of the sealing material 5 is smaller than a predetermined amount, a gap is left between the sealing material 5 and the second panel 16 when the first panel 15 and the second panel 16 are bonded together. Occurs. A gap is formed between the sealing material 5 and the second panel 16, so that the first panel 15 and the second panel 16
However, the sealing material 5 cannot reliably adhere to each other. When the application amount of the sealing material 5 is smaller than the predetermined amount, the role of the sealing material 5, for example, the first panel 15 and the second
It becomes impossible to sufficiently fulfill the role of reliably adhering to the panel 16.

By forming the sealing material 5 as described above, no gap is formed between the inner partition wall portion 7a and the second panel 16 and between the outer partition wall portion 7b and the second panel 16. , The sealing material 5 is the first panel 15 and the second
Since the panel 16 can be surely adhered to the panel 16, it is possible to improve the problem caused when the coating amount of the sealing material 5 is different from the predetermined amount.

As described above, the deterioration of the characteristics of the sealing material 5 and the liquid crystal is prevented, and the sealing material 5 and the liquid crystal layer 6 are formed.
Since it is possible to maintain the characteristics of 1) in a suitable state, it is possible to improve the display quality of the liquid crystal display device 1. In addition, the yield of the liquid crystal display element 2 can be improved, and more liquid crystal display elements 2 can be formed as compared with the related art, so that the productivity of the liquid crystal display device 1 can be improved.

The above-described embodiment is merely an example of the present invention, and the configuration can be changed within the scope of the present invention. For example, in the present embodiment, the inner partition wall portion 7a and the outer partition wall portion 7b are provided between the first substrate 3 and the second substrate 4, but only one of the inner partition wall portion 7a and the outer partition wall portion 7b is provided. It may be provided. Further, both the region where the inner partition wall portion 7a is to be formed and the region where the outer partition wall portion 7b is to be formed are exposed using a photomask patterned so that light is irradiated, Both the partition wall portion 7a and the outer partition wall portion 7b may be formed. In addition to the inner partition wall portion 7a and the outer partition wall portion 7b, a plurality of partition wall portions may be provided so as to surround the liquid crystal layer 6 so that the water impermeability is further improved. The size of the first panel 15 is the first
The dimensions of the substrate 3 may be the same, and the dimensions of the second panel 16 may be the same as the dimensions of the second substrate 4. The present invention can also be applied to a simple matrix type liquid crystal display device and a liquid crystal display device using a horizontal electric field method and a vertical electric field method.

[0096]

According to the present invention, the two substrates are bonded to each other by the sealing material, and the housing space sandwiched between the two substrates is formed by the sealing material. A liquid crystal is enclosed in a housing space formed by the sealing material to form a liquid crystal layer. A partition wall made of a water-impermeable material is provided so as to surround the liquid crystal layer. When the liquid crystal layer is surrounded by the water-impermeable partition wall, moisture can be prevented from entering and leaving the liquid crystal layer through the partition wall, and the characteristics of the liquid crystal forming the liquid crystal layer are deteriorated. Instead, the liquid crystal layer can be held in a suitable state. By holding the liquid crystal layer in a suitable state, for example, the alignment state of the liquid crystal molecules can be held in a predetermined state, so that the display quality of the liquid crystal display device can be improved. By providing the partition wall between the two substrates, it is possible to prevent the sealing material from being unnecessarily applied with pressure and to control the thickness of the sealing material in the inward and outward directions.
The dimensional accuracy of the sealing material can be improved. By improving the dimensional accuracy of the sealing material, the yield of the liquid crystal display device can be improved and the productivity of the liquid crystal display device can be improved.

Further, according to the present invention, the partition wall has a plurality of partition wall portions provided at intervals in the inner and outer directions. The plurality of partition portions are provided at intervals in the inner and outer directions including the direction from the sealing material toward the liquid crystal layer and the direction from the liquid crystal layer toward the sealing material. Since the partition wall has water impermeability and is provided so as to surround the liquid crystal layer, it is possible to further improve the water impermeability by the partition wall. By further improving the water impermeability by the partition walls, it is possible to prevent the characteristics of the liquid crystal from deteriorating and hold the liquid crystal layer in a suitable state. By holding the liquid crystal layer in a suitable state, the display quality of the liquid crystal display device can be improved. By providing a plurality of partition portions between the two substrates, it is possible to prevent the sealing material from being unnecessarily applied with pressure and to control the thickness of the sealing material in the inward and outward directions. The accuracy can be improved. By improving the dimensional accuracy of the sealing material, the yield of the liquid crystal display device can be improved and the productivity of the liquid crystal display device can be improved.

Further, according to the present invention, the partition wall is made of a material insoluble in the liquid crystal and has an inner partition wall portion interposed between the sealing material and the liquid crystal layer. By interposing the inner partition wall portion between the sealing material and the liquid crystal layer,
It is possible to prevent the sealing material from coming into contact with the liquid crystal layer. By preventing the sealing material from coming into contact with the liquid crystal layer, it is possible to prevent substances that adversely affect the liquid crystal from leaching from the inner partition wall portion itself into the liquid crystal layer and then leaching from the sealing material to the liquid crystal layer. It is possible to prevent deterioration of the characteristics of the liquid crystal. Since the partition wall is made of a material having water impermeability, it is possible to prevent water from entering and leaving the liquid crystal layer through the inner partition wall portion and prevent deterioration of liquid crystal characteristics. It can be held in a suitable state. Since the liquid crystal layer can be held in a suitable state, the display quality of the liquid crystal display device can be improved. Further, since the inner partition wall portion is provided so as to be interposed between the sealing material and the liquid crystal layer, when the substrates are bonded to each other, the sealing material swells in the direction from the sealing material to the liquid crystal layer. Can be prevented. By holding the liquid crystal layer in a suitable state and preventing the sealing material from bulging in the direction from the sealing material toward the liquid crystal layer, the dimensional accuracy of the sealing material can be improved. By improving the dimensional accuracy of the sealing material, the yield of the liquid crystal display device can be improved and the productivity of the liquid crystal display device can be improved.

Further, according to the present invention, the partition wall has an outer partition wall portion which is made of an impermeable material and is provided so as to surround the sealing material. An outer partition wall made of a material that is impermeable is provided around the seal material to prevent air from contacting the seal material and air from contacting the seal material through the outer partition wall portion. can do. Further, since the partition wall is made of a material having water impermeability, the outer partition wall portion is provided so as to surround the sealing material, so that moisture contained in the air is prevented from coming into contact with the sealing material through the outer partition wall portion. Can be prevented. By preventing the entry and exit of air and moisture by the outer partition wall portion, the sealing material can be protected from the air and moisture without being affected by the change in the state of humidity and temperature in the liquid crystal display device. By protecting the sealing material from air and moisture, it is possible to prevent the characteristics of the sealing material from deteriorating and hold the sealing material in a suitable state. By holding the sealing material in a suitable state, for example, it is possible to prevent the substrate from being displaced due to impact or vibration and affecting the display of an image, so that the display quality of the liquid crystal display device can be improved. . Further, since the outer partition wall portion is provided so as to surround the sealing material, when the substrates are bonded to each other, the sealing material is prevented from bulging in the direction from the liquid crystal layer toward the sealing material, and the sealing material is sealed. The dimensional accuracy of the material can be improved. By improving the dimensional accuracy of the sealing material,
The yield of the liquid crystal display device can be improved and the productivity of the liquid crystal display device can be improved.

Further, according to the present invention, the partition wall has an inner partition wall portion made of a material insoluble in liquid crystal and an outer partition wall portion made of a material having impermeable property. A sealing material is provided between the inner partition wall portion and the outer partition wall portion. By interposing the inner partition wall portion between the sealing material and the liquid crystal layer, a substance that adversely affects the liquid crystal is prevented from eluting into the liquid crystal layer and moisture is prevented from entering and leaving the liquid crystal layer. It is possible to prevent the characteristics of the liquid crystal from being deteriorated. By interposing the inner partition wall portion between the sealing material and the liquid crystal layer, it is possible to prevent the characteristics of the liquid crystal from deteriorating and hold the liquid crystal layer in a suitable state. The outer partition wall portion made of a material having an air-impermeable property is provided so as to surround the sealing material,
By protecting the sealing material from air and moisture,
It is possible to prevent the characteristics of the sealing material from deteriorating and hold the sealing material in a suitable state. By providing the sealing material between the inner partition wall portion and the outer partition wall portion as described above, the effect of the inner partition wall portion and the effect of the outer partition wall portion can be realized at the same time. By preventing the characteristics of the sealing material and the liquid crystal from deteriorating, the characteristics of the sealing material and the liquid crystal layer can be maintained in a suitable state, so that the display quality of the liquid crystal display device can be improved.

Since the sealing material is provided between the inner partition wall portion and the outer partition wall portion, the sealing material is prevented from being compressed more than necessary in the direction perpendicular to the inner and outer directions.
It is possible to prevent the sealing material from bulging inward and outward. By preventing the sealing material from bulging inward and outward, the thickness of the sealing material in the inward and outward directions and the thickness in the direction perpendicular to the inward and outward directions can be controlled to have a predetermined thickness. The dimensional accuracy of the material can be improved. By improving the dimensional accuracy of the sealing material, the yield of the liquid crystal display device can be improved, and the productivity of the liquid crystal display device can be improved. For example, when forming a plurality of liquid crystal display devices using a panel that is larger than the substrate, by improving the dimensional accuracy of the sealing material, it is possible to divide the panel at a position as close as possible to the sealing material. , The panel can be effectively used. Since the panel can be effectively used, more liquid crystal display devices can be formed as compared with the conventional case even when the size of the panel is the same as the panel in the conventional liquid crystal display device. Since more liquid crystal display devices can be formed as compared with the related art, the productivity of liquid crystal display devices can be improved.

According to the invention, the partition wall is made of a negative photosensitive resin. Since only the light-irradiated portion of the negative photosensitive resin becomes insoluble in the solution, the partition wall can be formed by irradiating the negative photosensitive resin with light so as to have a predetermined shape. By using the negative type photosensitive resin as the material of the partition wall, the thickness of the partition wall in the inner and outer directions can be made as thin as possible, and the partition wall can be precisely formed. By using a negative photosensitive resin as the material of the partition wall, even if the partition wall is irradiated with light from the outside, the characteristics of the partition wall are not deteriorated by the light, and the characteristics of the partition wall can be maintained in a suitable state. it can. Since the characteristics of the partition can be maintained in a suitable state, the display quality of the liquid crystal display device can be improved. By using the negative type photosensitive resin as the material of the partition wall, the partition wall can be precisely formed, so that the yield of the liquid crystal display device can be improved and the productivity of the liquid crystal display device can be improved.

Further, according to the present invention, the partition wall is formed so that its height is the same as the cell gap indicating the distance between the two substrates. Since the cell gap is set by the partition walls, the two substrates can be accurately positioned without separately providing a spacer for uniformly maintaining the cell gap. Since the yield of the liquid crystal display device can be improved by accurately positioning the substrate by using the partition wall having the same height as the cell gap, the productivity of the liquid crystal display device can be improved. When the sealing material is provided between the inner partition wall portion and the outer partition wall portion of the partition wall having the same height as the cell gap, the inner partition wall portion and the outer partition wall portion should maintain the hermeticity of the liquid crystal layer and the sealing material. Therefore, it is possible to prevent the characteristics of the sealing material and the liquid crystal from being deteriorated as described above. By preventing the characteristics of the sealing material and the liquid crystal from deteriorating, the liquid crystal layer and the sealing material can be held in a suitable state, so that the display quality of the liquid crystal display device can be improved.

[Brief description of drawings]

FIG. 1 shows a liquid crystal display element 2 included in a liquid crystal display device 1 according to an embodiment of the present invention, in which a section line S1-S1 in FIG.
It is sectional drawing seen from.

FIG. 2 is a cross-sectional view showing an enlarged part of the liquid crystal display element 2 viewed from a section line S2-S2 in FIG.

FIG. 3 shows an outer partition wall portion 7b and a first transparent electrode 10,
FIG. 3 is a front view showing the liquid crystal display element 2 provided on the first panel 15.

FIG. 4 is a cross-sectional view showing the liquid crystal display element 2 taken along the section line S4-S4 in FIG.

5 is a front view showing the liquid crystal display element 2 in a state where the inner partition wall portion 7a is further provided on the first panel 15 provided with the outer partition wall portion 7b and the first transparent electrode 10. FIG.

6 is a cross-sectional view showing the liquid crystal display element 2 taken along the section line S6-S6 in FIG.

FIG. 7 is a front view showing the liquid crystal display element 2 in a state where a first alignment film 8 is further provided on a first panel 15 provided with an inner partition wall portion 7a, an outer partition wall portion 7b and a first transparent electrode 10. .

8 is a cross-sectional view showing the liquid crystal display element 2 taken along the section line S8-S8 in FIG.

FIG. 9 shows a liquid crystal display element 2 in which a sealing material 5 is further provided on a first panel 15 provided with an inner partition wall portion 7a, an outer partition wall portion 7b, a first alignment film 8 and a first transparent electrode 10. It is a front view shown.

10 is a cross-sectional view showing the liquid crystal display element 2 taken along the section line S10-S10 in FIG.

FIG. 11 shows the liquid crystal display element 2 in a state in which the first panel 15 and the second panel 16 are attached to each other, taken along the section line S in FIG.
It is sectional drawing seen from 11-S11.

12 is an enlarged cross-sectional view of the liquid crystal display element 2 taken along the section line S12-S12 of FIG.

FIG. 13 shows the liquid crystal display element 2 in a state in which the first panel 15 and the second panel 16 are divided, and cut line S1 in FIG.
3 is a cross-sectional view seen from S13.

14 is an enlarged cross-sectional view of the liquid crystal display element 2 taken along the section line S14-S14 of FIG.

[Explanation of symbols]

1 Liquid crystal display 2 Liquid crystal display element 3 First substrate 4 Second substrate 5 Seal material 6 Liquid crystal layer 7 partition 7a Inner partition wall 7b Outer partition wall 8 First alignment film 9 Second alignment film 10 First transparent electrode 11 Second transparent electrode 12 Inlet sealant 13 accommodation space 14 Inlet 15 First panel 16 Second panel

Claims (7)

[Claims] 1. A substrate, two substrates, a sealing material that adheres the substrates to each other and forms an accommodation space sandwiched between the substrates, a liquid crystal layer made of liquid crystal enclosed in the accommodation space, and a water impermeable layer. A liquid crystal display device, comprising: a partition wall formed of a material having the liquid crystal layer and surrounding the liquid crystal layer. 2. The partition wall has a plurality of partition wall portions provided at intervals in the inner and outer directions.
The described liquid crystal display device. 3. The liquid crystal display according to claim 1, wherein the partition wall is made of a material insoluble in liquid crystal, and has an inner partition wall portion interposed between the sealing material and the liquid crystal layer. apparatus. 4. The liquid crystal display device according to claim 1, wherein the partition wall is made of an impermeable material, and has an outer partition wall portion surrounding the sealing material. 5. The partition wall has an inner partition wall portion made of a material insoluble in liquid crystal and an outer partition wall portion made of an impermeable material, and the sealing material is provided between the partition wall portions. The liquid crystal display device according to claim 1, wherein the liquid crystal display device is a liquid crystal display device. 6. The liquid crystal display device according to claim 1, wherein the partition wall is made of a negative photosensitive resin. 7. The liquid crystal display device according to claim 1, wherein the height of the partition wall is the same as the cell gap.