JP2001183688A - Liquid crystal display element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal display element where a first cross electrode and a second cross electrode which are respectively provided on a first film substrate and a second film substrate can be connected in a satisfactory conduction state and where a satisfactory display quality free from display irregularity is obtained. SOLUTION: A plurality of insulating spacers 31 having a prescribed diameter and a plurality of conductive filters 32 which have a diameter 1 to 3 μm larger than that of spacers 31 and can be deformed by compression are mixed in a frame-shaped sealant 30, which joins a first film substrate 10 and a second film substrate 20, in a dispersed state. First and second cross electrodes 12 and 22 are electrically connected by conductive fillers 32 located in an area where the first and second cross electrodes 12 and 22 provided respectively on the first and second film substrates 10 and 20 face each other, out of the conductive fillers 32.

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 using a film substrate.

[0002]

2. Description of the Related Art As a liquid crystal display element, there is an element using a film substrate made of a resin film for each of a pair of substrates.

There are two types of liquid crystal display devices, one having terminal electrodes for connecting to an external circuit on a pair of film substrates and the other having all terminal electrodes on one film substrate. In terms of ease of circuit connection,
The latter is advantageous.

[0004] The latter liquid crystal display element comprises a first film substrate and a second film substrate having a terminal array protruding outside the first film substrate. A region surrounded by the sealing material between the first and second film substrates, which is joined via a frame-shaped sealing material mixed with a plurality of insulating spacers having a predetermined diameter for regulating the distance between the substrates. A liquid crystal layer is provided on the first film substrate and the second film substrate, of the inner surfaces facing each other, on the film inner surface of the first substrate,
At least one formed in a region surrounded by the sealing material
One first electrode and at least one first cross electrode connected to the first electrode are provided, and a plurality of second electrodes facing the first electrode are provided on an inner surface of the second film substrate.
, A second cross electrode facing the first cross electrode, and a plurality of terminal electrodes arranged in the terminal arrangement portion and connected to the plurality of second electrodes and the second cross electrode, respectively. And the first and second cross electrodes are electrically connected by a conductive filler sandwiched between these cross electrodes.

[0005] The connection method of the first and second cross electrodes using the conductive filler includes a cross electrode connection method using the sealing material and a cross electrode connection method using the cross material.

In the cross electrode connection method using the sealing material, the first and second cross electrodes are formed in a substrate joining region by the sealing material, and a plurality of conductive fillers are provided on the sealing material by the plurality of spacers. And the first and second cross electrodes are electrically mixed by a conductive filler in a region of the conductive filler where the first cross electrode and the second cross electrode face each other. Connected.

In the cross electrode connection method using a cross material, the first and second cross electrodes are formed at or near a substrate bonding region by the seal material, and the first and second cross electrodes are formed between the first and second film substrates. A first cross electrode and the second
A cross material obtained by mixing a conductive filler in a resin adhered to the first and second film substrates is provided in a region where the cross electrode faces the first and second film substrates, and the first and second cross materials are provided by the conductive filler of the cross material. Are electrically connected.

In this connection method, when the first and second cross electrodes are formed in a substrate joining region by the seal material, the cross material is provided so as to penetrate the seal material.

[0009]

However, in the conventional liquid crystal display device, the conductive filler and the conductive filler when the first and second film substrates are joined by the sealing material with the spacer interposed therebetween and the spacer are interposed therebetween. 1st cross electrode and 2nd
Therefore, none of the above-mentioned cross electrode connection methods can connect the first cross electrode and the second cross electrode in a good conduction state.

According to the present invention, the first cross electrode and the second cross electrode provided on the first film substrate and the second film substrate can be connected in a good conduction state, and the display unevenness can be reduced. It is an object of the present invention to provide a liquid crystal display element capable of obtaining excellent display quality.

[0011]

According to a liquid crystal display device of the present invention, a first film substrate and a second film substrate having a terminal array protruding outside the first film substrate have a frame shape. The first and second parts are joined via a sealing material.
A liquid crystal layer is provided in a region surrounded by the sealant between the film substrates, and among the inner surfaces of the first film substrate and the second film substrate facing each other, the inner surface of the first film substrate At least one first electrode formed in a region surrounded by the sealing material, and at least one first cross electrode formed in a substrate bonding region formed by the sealing material and connected to the first electrode; Is provided on the inner surface of the second film substrate.
A plurality of second electrodes facing the first electrode; a second cross electrode facing the first cross electrode; and a plurality of second electrodes facing the first cross electrode.
A plurality of terminal electrodes respectively connected to the cross electrode, a plurality of insulating spacers having a predetermined diameter, and a plurality of conductive fillers having a diameter larger by 1 μm to 3 μm than the diameter of the spacer. Are mixed in a dispersed state, the distance between the first and second film substrates is regulated by the plurality of spacers, and the first cross electrode and the second cross electrode of the plurality of conductive fillers are mixed. The first and second cross electrodes are electrically connected to each other by a conductive filler in a region where the first and second cross electrodes face each other.

In this liquid crystal display element, a plurality of conductive fillers are mixed with the sealing material in a dispersed state together with a plurality of insulating spacers, and the first cross electrode and the second cross electrode among the conductive fillers are mixed. Are electrically connected to the first and second cross electrodes by a conductive filler in a region facing the conductive filler. The diameter of the conductive filler is made larger than the diameter of the spacer, Is 1 μm or more, so that the conductive filler and the first filler when the first and second film substrates are bonded to each other by the sealing material with the spacer interposed therebetween.
The contact between the first cross electrode and the second cross electrode is strengthened so that the electric resistance is sufficiently small, and the first cross electrode and the second cross electrode can be connected in a good conduction state.

Moreover, in this liquid crystal display element, the plurality of spacers and the plurality of conductive fillers having a diameter larger than the diameter of the spacers are mixed in the sealing material in a dispersed state. The distance between the first and second film substrates near the region where the conductive filler exists is different from the substrate distance regulated by the spacer, but the difference in diameter between the spacer and the conductive filler is 3 μm or less. Therefore, the difference between the substrate spacing in the vicinity of the region where the conductive filler is present and the substrate spacing regulated by the spacers in other regions, that is, the difference in the thickness of the liquid crystal layer is determined by the electro-optical characteristics of the liquid crystal display element. , So that good display quality without display unevenness can be obtained.

According to another liquid crystal display device of the present invention, a first film substrate and a second film substrate having a terminal arrangement portion protruding outside the first film substrate are provided with a frame-shaped sealing material interposed therebetween. A liquid crystal layer is provided in a region surrounded by the sealant between the first and second film substrates, and an inner surface of the first film substrate and the second film substrate opposed to each other is provided. Wherein at least one first electrode formed on an inner surface of the first film substrate in a region surrounded by the sealing material and a substrate bonding region formed by the sealing material or in the vicinity thereof;
At least one first cross electrode connected to the first electrode and a plurality of second electrodes facing the first electrode on the inner surface of the second film substrate; An opposing second cross electrode and a plurality of terminal electrodes arranged and formed in the terminal arrangement portion and connected to the plurality of second electrodes and the second cross electrode, respectively, are provided. A plurality of insulating spacers having a diameter of 3 are mixed in a dispersed state, the distance between the first and second film substrates is regulated by the plurality of spacers, and the distance between the first and second film substrates is reduced. In a region where the first cross electrode and the second cross electrode face each other, a conductive filler having a diameter 3 μm to 4 μm larger than the diameter of the spacer is added to a resin bonded to the first and second film substrates. A mixed cloth material is provided, and the first and second cloth materials are provided by the conductive filler of the cloth material.
Are electrically connected to each other.

In this liquid crystal display device, the first and second cross electrodes are formed at or near a substrate bonding region by the sealant, and the first cross electrode between the first and second film substrates is formed. And a cross material in which a conductive filler is mixed into a resin adhered to the first and second film substrates, in a region where the second cross electrode and the second cross electrode face each other. The first and second cross electrodes are electrically connected. The diameter of the conductive filler is made larger than the diameter of the spacer mixed in the sealing material in a dispersed state, and the difference in diameter is 3
μm or more, the conductive filler and the first cross electrode and the second cross electrode when the first and second film substrates are joined by the sealing material with the spacer interposed therebetween. The contact is strengthened so that the electric resistance becomes sufficiently small, and the first cross electrode and the second cross electrode can be connected in a good conduction state.

In addition, the liquid crystal display element has a spacer mixed with the sealing material in a region between the first and second film substrates where the first cross electrode and the second cross electrode face each other. Since a cloth material containing a conductive filler having a diameter larger than the diameter of the cloth material is provided, the first material near the region where the cloth material is provided is provided.
Although the distance between the substrate and the second film substrate is different from the substrate distance regulated by the spacer mixed in the sealing material, the difference in diameter between the spacer and the conductive filler is 4 μm or less. The difference between the substrate spacing in the vicinity of the given region and the substrate spacing regulated by the spacers in other regions, that is, the difference in the layer thickness of the liquid crystal layer is such that the electro-optical characteristics of the liquid crystal display element are hardly affected. Therefore, good display quality without display unevenness can be obtained.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As described above, a liquid crystal display element of the present invention comprises a frame-shaped sealing material for joining a first film substrate and a second film substrate, and a plurality of insulating materials having a predetermined diameter. A spacer, 1 μm to 3 μm larger than the diameter of the spacer
A plurality of conductive fillers having a large diameter are mixed in a dispersed state, and the first conductive filler among the plurality of conductive fillers is mixed.
The first and second cross electrodes are electrically connected to each other by a conductive filler in a region where the first and second cross electrodes provided on the second film substrate face each other. The electrode and the second cross electrode are connected in a good conduction state, and good display quality without display unevenness is obtained.

In the liquid crystal display device of the present invention, the first cross electrode and the second
A side including a region facing the cross electrode is formed wider than the other sides, and the first and second cross electrodes face each other over substantially the entire width of the side of the sealing material. Preferably, by doing so, more of the conductive filler mixed in the sealing material in a dispersed state is sandwiched between the first and second cross electrodes, and these cross electrodes are further brought into a more conductive state. To improve the reliability.

According to another aspect of the present invention, there is provided a liquid crystal display element comprising a cross member provided in a region between the first and second film substrates where the first cross electrode and the second cross electrode face each other. Mixed with a conductive filler having a diameter 3 μm to 4 μm larger than the diameter of the insulating spacer mixed in a dispersed state in the frame-shaped sealing material for joining the first and second film substrates. By electrically connecting the first and second cross electrodes with a filler, the first and second cross electrodes are connected in a good conduction state, and good display without display unevenness is achieved. It is to get the quality.

In the liquid crystal display device according to the present invention, a plurality of conductive fillers having a diameter larger than the diameter of the spacer mixed into the sealing material by 3 μm to 4 μm and having different diameters are provided in the cloth material. It is preferable to mix the first cross electrode and the second cross electrode with respect to the undulation and expansion / contraction of the first and second film substrates due to environmental conditions such as temperature and humidity. The conductive state with the cross electrode can be kept good, and the reliability can be further improved.

[0021]

1 to 3 show a first embodiment of the present invention. FIG. 1 is an exploded perspective view of a liquid crystal display device, and FIG. 2 is an insulating material mixed in a frame-like sealing material in this embodiment. FIG. 3 is a cross-sectional view of a cross-electrode connection portion in a substrate bonding region of the liquid crystal display element with a sealing material, showing a spacer and a conductive filler.

As shown in FIG. 1, the liquid crystal display device of this embodiment includes first and second film substrates 10 and 20 made of a transparent resin film such as PET (polyethylene terephthalate), PC (polycarbonate), and polyester. A liquid crystal layer (not shown) is provided in a region surrounded by the seal member 30 between the first and second film substrates 10 and 20 by joining through a frame-shaped seal member 30.

The first and second film substrates 10 and 20
Among them, the lower second film substrate in the drawing (hereinafter, referred to as the second film substrate)
The lower film substrate 20 is a first upper substrate in the drawing.
And a terminal array portion 20a protruding outside the film substrate (hereinafter, referred to as an upper film substrate) 10 in a region corresponding to a peripheral portion of the upper film substrate 10. And are joined.

Among the inner surfaces of the upper film substrate 10 and the lower film substrate 20 facing each other, the inner surface of the upper film substrate 10 has a plurality of first transparent substrates formed in a region surrounded by the sealant 30. The electrode 11 and the sealing material 3
And a plurality of first cross electrodes 12 formed in a substrate bonding region of the lower film substrate 20. A plurality of second transparent electrodes 21 facing the first electrodes 11 are provided on the inner surface of the lower film substrate 20. A plurality of second cross electrodes 22 facing the plurality of first cross electrodes 12, respectively; and a plurality of terminal electrodes 23 and 24 arranged and formed in the terminal arrangement portion 20a.
Are provided.

Although not shown in the drawing, an alignment film is provided on the inner surfaces of the upper film substrate 10 and the lower film substrate 20 over substantially the entire region surrounded by the sealing material 30, respectively. The first electrode 11 and the second electrode 21 are covered with the alignment film.

The liquid crystal display device of this embodiment is of a simple matrix type, and a plurality of first electrodes 11 provided on the inner surface of the upper film substrate 10 are arranged in a row direction (left-right direction of the screen). Scanning electrodes formed in parallel with each other, and a plurality of second electrodes provided on the inner surface of the lower film substrate 20.
Are the signal electrodes formed in parallel with each other along the column direction (vertical direction of the screen), and the terminal arrangement portions 20a of the lower film substrate 20 It is formed on one of the side edges.

The plurality of first cross electrodes (hereinafter, referred to as upper cross electrodes) 12 provided on the upper film substrate 10 are respectively connected to the lower film substrate 20 in the substrate bonding region by the sealant 30. Are arranged at predetermined positions in the substrate bonding region along the terminal array portion 20a, for example, at one end and the other end of the substrate bonding region along the terminal array portion 20a.

The upper cross electrodes 12 correspond to the plurality of scanning electrodes (first electrodes) 11 formed on the inner surface of the upper film substrate 10, respectively. One end or the other end thereof is connected to the corresponding upper cross electrode 12 via a plurality of lead wires 13 which are led to the arrangement region of the upper cross electrode 12 while bypassing the formation region of the scanning electrode 11. ing.

A predetermined number of terminal electrodes 23 of the plurality of terminal electrodes 23 and 24 arranged in the terminal arrangement portion 20a of the lower film substrate 20
The terminal electrodes for signal electrodes and the other terminal electrodes 24 respectively corresponding to the plurality of signal electrodes (second electrodes) 21 formed on the inner surface of the lower film substrate 20 are formed on the inner surface of the lower film substrate 20. Scan electrode terminal electrodes respectively corresponding to second cross electrodes (hereinafter, referred to as lower cross electrodes) 22, wherein the signal electrode terminal electrodes 23 are arranged in a central region of the terminal arrangement portion 20 a, and Terminal electrode 2
A plurality of reference numerals 4 are arranged in respective regions on both ends of the terminal arrangement portion 20a.

The plurality of signal electrode terminal electrodes 23 are formed so as to extend from the edge of the terminal arrangement portion 20a into the substrate bonding region by the sealing material 30, and the plurality of signal electrodes 21 are respectively formed. Are connected to the corresponding signal electrode terminal electrodes 23 via a plurality of lead wires 25 derived from one end thereof.

The scanning electrode terminal electrode 24 is formed from the edge of the terminal array portion 20a to the area where the lower cross electrode 22 is formed. It is formed integrally with the scanning electrode terminal electrode 24 corresponding to the electrode 22, and is directly connected to these scanning electrode terminal electrodes 24.

On the other hand, the frame-shaped sealing material 30 is made of, for example, an epoxy resin. The sealing material 30 is provided on the entire surface of the sealing material 30 to regulate the distance between the upper film substrate 10 and the lower film substrate 20. A plurality of insulating spacers 31 having a predetermined diameter, the upper cross electrode 12 provided on the inner surface of the upper film substrate 10 and the lower cross electrode 22 provided on the inner surface of the lower film substrate 20 are electrically connected. A plurality of conductive fillers 32 for connection are mixed in a dispersed state.

The insulating spacer 31 is formed as shown in FIG.
As shown in (1), it is a granular spacer made of a hard insulating material (for example, glass) formed in a spherical shape, and is designed according to the electro-optical characteristics of the liquid crystal display element and the refractive index anisotropy of the liquid crystal material used. It has a diameter D1 corresponding to the thickness of the liquid crystal layer.

The conductive filler 32 is, as shown in FIG. 2 (b), a spherically formed compressible and deformable granular filler. It has a diameter D2 that is 1 μm to 3 μm larger than the diameter D1.

In FIG. 3, for the sake of convenience, the cross-section of the conductive filler 32 is illustrated as a molded article made of a single substance. However, the conductive filler 32 may be, for example, a resin formed in a spherical shape. The entire surface of the material is covered with a metal film such as gold or silver having good conductivity and bending deformation.

The amount of the conductive filler 32 mixed into the sealing material 30 is such that the conductive filler 32 has a pitch smaller than the arrangement pitch of the plurality of upper cross electrodes 12 and lower cross electrodes 22, that is, one upper electrode. Cross electrode 12
And at least one or more conductive fillers 32 are arranged at a corresponding pitch between the lower cross electrode 22 and the lower cross electrode 22, and most of the conductive fillers 32 are distributed so as not to contact each other. Insulating spacer 31
The mixing amount of the conductive filler 32 is almost the same as the mixing amount of the conductive filler 32 so that one to several spacers 31 are present in the space between the plurality of conductive fillers 32 distributed as described above, or The amount is set to be slightly larger than the mixing amount of the conductive filler 32.

In the liquid crystal display device of this embodiment,
As shown in FIG. 3, the upper film substrate 10 and the lower film substrate 20 are regulated by the plurality of insulating spacers 31 mixed with the sealing material 30 in a dispersed state via the sealing material 30. The upper cross electrode 12 and the lower cross electrode 22 of the plurality of conductive fillers 32 mixed with the sealing material 30 in a dispersed state and the filler 32 in the region where the lower cross electrode 22 opposes. The upper and lower cross electrodes 12, 22 are electrically connected.

In this liquid crystal display device, the plurality of insulating spacers 31 and conductive fillers 32 are mixed on the inner surface of one of the upper film substrate 10 and the lower film substrate 20 (for example, the lower film substrate 20). Seal material 3
0 is printed on the inner surface of the other film substrate (for example, the upper film substrate 10) in a region surrounded by the sealing material 30 so as to regulate the substrate interval. After spraying the gap material (not shown), the film substrates 10 and 20 are overlapped and pressed to adjust the substrate interval to an interval regulated by the spacer 31 and the gap material. The sealing material 30 is cured, and the upper film substrate 10 and the lower film substrate 2 are
0 is assembled by joining the two.

As described above, when the upper film substrate 10 and the lower film substrate 20 are superposed and pressed to adjust the substrate interval to an interval regulated by the spacer 31 and the gap material, the substrate is dispersed in the seal material 30. The mixed conductive fillers 32 are compressed and deformed as shown in FIG. 3, and the fillers 32 in the regions where the upper cross electrode 12 and the lower cross electrode 22 of the conductive fillers 32 face each other are vertically aligned. , And are electrically connected to each other via a conductive filler 32 therebetween.

After that, the upper film substrate 10
A liquid crystal injection port 31a (see FIG. 1) formed by removing a part of the sealing material 31 when printing the sealing material 31 in a region surrounded by the sealing material 30 between the substrate and the lower film substrate 20 by a vacuum injection method. A liquid crystal material is filled, then the liquid crystal injection port 31a is sealed, and if necessary, an optical member such as a polarizing plate is arranged on one or both outer surfaces of the upper and lower film substrates 10 and 20, and What is necessary is just to complete a display element.

In the above manufacturing method, the sealing material 3
0 to one of the film substrates, for example, the lower film substrate 20
However, the sealing material 30 may be printed on both the upper film substrate 10 and the lower film substrate 20. In this case, the sealing material printed on one of the film substrates may be provided with the insulating material. The conductive spacer 31 and the conductive filler 32 may be mixed.

In this liquid crystal display device, a plurality of conductive fillers 32 are provided on the sealing material 30 and a plurality of insulating spacers 31 are provided.
And the upper and lower cross electrodes 12, 22 are electrically connected by the conductive filler 32 in a region of the conductive filler 32 where the upper cross electrode 12 and the lower cross electrode 22 oppose each other. However, the diameter D2 of the conductive filler 32 is made larger than the diameter D1 of the spacer 31, and the diameter difference (D2-D
Since 1) is 1 μm or more, the conductive filler 32 and the upper cross electrode 12 and the lower cross electrode when the upper and lower film substrates 10 and 20 are joined by the sealing material 30 with the spacer 31 interposed therebetween. 22
The contact force between the upper cross electrode 12 and the lower cross electrode 22 can be connected in a good conduction state by increasing the contact force between the upper cross electrode 12 and the lower cross electrode 22 so that the electric resistance of the contact portion is sufficiently small.

In addition, the liquid crystal display element comprises a plurality of the spacers 31 and the
Since a plurality of conductive fillers 32 having a diameter larger than 1 are mixed in a dispersed state, the distance between the upper and lower film substrates 10 and 20 in the vicinity of the region where the conductive filler 32 exists is limited. , The spacer 31
Is different from the substrate spacing regulated by
1 and the diameter difference (D2−D1) between the conductive fillers 32 is 3 μm or less, so that the substrate spacing in the vicinity of the region where the conductive fillers 32 exist and the substrate regulated by the spacers 31 in other regions. The difference from the interval, that is, the difference in the layer thickness of the liquid crystal layer is such that the electro-optical characteristics of the liquid crystal display element are hardly affected, and therefore, good display quality without display unevenness can be obtained.

That is, the liquid crystal display device of this embodiment is
A plurality of conductive fillers 32 are mixed into the sealing material 30 together with a plurality of insulating spacers 31 in a dispersed state, and the conductive filler 32 is compressed and deformed as shown in FIG. Since the conductive filler 32 is sandwiched between the substrates 10 and 20, even if the diameter D2 of the conductive filler 32 in the non-pressurized state is larger than the diameter D1 of the spacer 31, if the difference (D2−D1) is smaller than 1 μm, The amount of elastic deformation is small and the conductive filler 32
The contact between the upper cross electrode 12 and the lower cross electrode 22 is weak, and the electric resistance cannot be sufficiently reduced.

When the diameter D2 of the conductive filler 32 in the non-pressurized state is larger than 3 μm, the conductive filler 32 and the upper cross electrode 12 and the lower cross electrode 2
2, the difference between the substrate spacing in the vicinity of the region where the conductive filler 32 is present and the substrate spacing regulated by the spacers 31 in other regions (the thickness of the liquid crystal layer) is increased. Difference) affects the electro-optical characteristics of the liquid crystal display element, causing display unevenness.

However, as described above, the spacer 31
And the diameter difference (D2-D1) between the conductive filler 32 and the conductive filler 32 is 1
In the range of 3 μm to 3 μm, the conductive filler 3
2 and the upper cross electrode 12 and the lower cross electrode 22 are strengthened so that the electrical resistance of the contact portion is sufficiently small, and the upper cross electrode 12 and the lower cross electrode 22 are maintained in a good conduction state. In addition to the connection, the difference (difference in liquid crystal layer thickness) between the substrate interval in the vicinity of the region where the conductive filler 32 is present and the substrate interval regulated by the spacers 31 in other regions is determined by the electro-optic It is possible to obtain good display quality without display unevenness, so that the characteristics are hardly affected.

In the above embodiment, as shown in FIG. 1, the width of each side of the frame-shaped sealing material 30 for joining the upper film substrate 10 and the lower film substrate 20 is substantially the same. Among the sides of the sealing material 30, the side including the region where the upper cross electrode 12 and the lower cross electrode 22 face each other is:
The upper and lower cross electrodes 1 are formed wider than the other sides.
It is preferable that the two members 22 face each other over substantially the entire width of the side of the sealing member 30.

FIG. 4 is an exploded perspective view of a liquid crystal display device showing a second embodiment of the present invention. In this embodiment, the upper cross electrode 12 and the lower cross electrode 22 of each side of the seal member 30 are shown. And the side including the area where
The upper and lower cross electrodes 1
2 and 22 are formed to be long in the width direction of the sealing material 30 so as to face each other over substantially the entire width of the side of the sealing material 30.

In the liquid crystal display element of this embodiment, the width of the side including the area where the upper cross electrode 12 and the lower cross electrode 22 of the sealing material 30 face each other and the width of the upper and lower cross electrodes 1
Although the lengths in the width direction of the sealing materials 30 are different from those of the first and second embodiments, the other configurations are the same as those of the first embodiment described above. .

According to this embodiment, more conductive filler 32 mixed in the sealing material 30 in a dispersed state can be sandwiched between the upper cross electrode 12 and the lower cross electrode 22. These cross electrodes 12, 2
2 can be connected in a more favorable conduction state, and the reliability thereof can be further improved.

FIGS. 5 and 6 show a third embodiment of the present invention. FIG. 5 is an exploded perspective view of a liquid crystal display device.
FIG. 4 is a cross-sectional view of a cross electrode connection portion in a substrate bonding region of the liquid crystal display element with a sealing material.

In the liquid crystal display element of this embodiment, a frame-like sealing material 30 for joining the upper film substrate 10 and the lower film substrate 20 is provided with a predetermined spherical hard insulating material (for example, glass). Insulating spacers 3 of different diameters
1 are mixed in a dispersed state, the spacers 31 regulate the distance between the upper and lower film substrates 10 and 20, and the upper cross electrode 12 and the lower cross electrode 22 between the upper and lower film substrates 10 and 20 face each other. In a region to be bonded, a cloth material 33 in which a conductive filler 35 is mixed with a resin (for example, the same epoxy resin as the sealing material 30) 34 that adheres to the upper and lower film substrates 10 and 20 is provided. The upper and lower cross electrodes 12, 22 are electrically connected by a conductive filler 35.

In the liquid crystal display device of this embodiment, only a plurality of insulating spacers 31 for regulating the distance between the upper and lower film substrates 10 and 20 are mixed in the sealing material 30 in a dispersed state. A cross member 33 mixed with a conductive filler 35 is provided in a region between the substrates 10 and 20 where the upper cross electrode 12 and the lower cross electrode 22 face each other. Since the description is the same as that of the example, the duplicate description is omitted by attaching the same reference numerals to the drawings.

In this embodiment, the conductive filler 35 mixed into the cloth material 33 is a spherically formed compressible deformable granular filler, and is mixed with the sealing material 30 in a non-pressurized state. It has a diameter that is 3 μm to 4 μm larger than the diameter of the plurality of insulating spacers 31.

In FIG. 6, for the sake of convenience, the cross section of the conductive filler 35 is illustrated as a molded article made of a single substance. However, the conductive filler 35 may be, for example, a resin formed in a spherical shape. The entire surface of the material is covered with a metal film having good conductivity and bending deformability such as an aluminum alloy or silver.

The cloth material 33 is provided on the upper film substrate 10.
And a plurality of lower cross electrodes 22 provided on the inner surface of the lower film substrate 20.
Are provided so as to penetrate the sealing material 30 in each of the areas facing each other, and a plurality of conductive fillers 35 having the same diameter are mixed in these cross members 33, respectively.

In the liquid crystal display device of this embodiment, a cross-section obtained by mixing a conductive filler 35 with the resin 34 is formed on the inner surface of one of the upper film substrate 10 and the lower film substrate 20 (for example, the lower film substrate 20). The material 33 is printed slightly thicker than a predetermined substrate interval by a screen printing method, and the resin 34 is temporarily cured, and the plurality of insulating spacers 31 are mixed on the inner surface of the other film substrate (for example, the upper film substrate 10). The seal material 30 is printed slightly thicker than a predetermined substrate interval by a screen printing method, and the seal material 3 on the inner surface of one of the upper and lower film substrates 10 and 20 is printed.
After spraying a plurality of gap members (not shown) for regulating the substrate interval in a region surrounded by 0, the film substrates 10 and 20 are overlapped and pressed to reduce the substrate interval by the spacer 31 and the spacer 31. The gap is regulated by the gap material, and the resin 34 of the sealing material 30 and the cloth material 33 is cured in that state, and the upper film substrate 10 and the lower film substrate 20 are cured by the sealing material 30.
And by electrically connecting the upper and lower cross electrodes 12 and 22 with the conductive filler 35 in the cloth material 33.

As described above, when the upper film substrate 10 and the lower film substrate 20 are superposed and pressed to adjust the substrate interval to an interval regulated by the spacer 31 and the gap material, one of the film substrates (for example, the lower film substrate) is pressed. The cloth material 33 printed on the inner surface of the substrate 20) and temporarily cured with the resin 34 enters the sealing material 30 printed on the inner surface of the other film substrate (for example, the upper film substrate 10). A plurality of conductive fillers 35 penetrating the sealing material 30 and
Are compressed and deformed as shown in FIG.
The cross electrodes 12 and 22 are electrically connected via a plurality of conductive fillers 35 therebetween.

The liquid crystal display element of this embodiment is arranged such that the upper and lower film substrates 1 and 20 are located between the upper and lower film substrates 10 and 20 so that the upper and lower cross electrodes 12 and 22 face each other.
A cross member 33 is prepared by mixing a conductive filler 35 in a resin 34 bonded to the substrates 0 and 20, and the upper and lower cross electrodes 12 and 22 are electrically connected by the conductive filler 35 in the cross member 33. , The conductive filler 35
Is larger than the diameter of the plurality of spacers 31 mixed in the sealing material 30 in a dispersed state and the difference in diameter is 3 μm or more, so that the upper and lower film substrates 10 and 20 are interposed between the spacers 30. And the upper cross electrode 12 and the lower cross electrode 2 when the conductive filler 35 and the upper cross electrode 12 are joined together by the seal material 30.
The contact force between the upper cross electrode 12 and the lower cross electrode 22 can be connected in a good conduction state by increasing the contact force between the upper cross electrode 12 and the lower cross electrode 22 so that the electric resistance of the contact portion is sufficiently small.

In addition, this liquid crystal display element is provided with a sealing material 30 in a region between the upper and lower film substrates 10 and 20 where the upper cross electrode 12 and the lower cross electrode 22 face each other.
Since the cross member 33 in which the conductive filler 35 having a diameter larger than the diameter of the spacer 31 mixed in is provided, the upper and lower film substrates 10 near the region where the cross member 33 is provided are provided. Although the distance between the substrates 20 is different from the distance between the substrates regulated by the spacers 31 mixed into the sealing material 30, the cloth material 33 is provided because the diameter difference between the spacers 31 and the conductive filler 35 is 4 μm or less. The difference between the substrate spacing in the vicinity of the given region and the substrate spacing regulated by the spacers 31 in other regions, that is, the difference in the layer thickness of the liquid crystal layer, is such that it hardly affects the electro-optical characteristics of the liquid crystal display element. Yes, and therefore, good display quality without display unevenness can be obtained.

That is, the liquid crystal display device of this embodiment is
A cloth material 33 mixed with a conductive filler 35 is provided in a region where the upper cross electrode 12 and the lower cross electrode 22 face each other between the upper and lower film substrates 10 and 20. As shown in FIG. 6, since the conductive filler 35 is sandwiched between the upper and lower film substrates 10 and 20 while being compressed and deformed, even if the diameter of the conductive filler 35 in the non-pressed state is larger than the diameter of the spacer 31, When the difference is smaller than 3 μm, the adhesion between the conductive filler 35 and the upper cross electrode 12 and the lower cross electrode 22 is weak, and the electrical resistance of the contact portion cannot be sufficiently reduced.

If the diameter of the conductive filler 35 in a non-pressurized state is larger than 4 μm, the adhesion between the conductive filler 35 and the upper cross electrode 12 and the lower cross electrode 22 becomes strong, but on the other hand, The difference between the substrate spacing in the vicinity of the region where the cloth material 33 is provided and the substrate spacing regulated in the other region by the plurality of spacers 31 mixed in the sealing material 30 (difference in liquid crystal layer thickness) is as follows. This affects the electro-optical characteristics of the liquid crystal display element and causes display unevenness.

However, as described above, the spacer 31
If the difference in diameter between the conductive filler 35 and the conductive filler 35 is in the range of 3 μm to 4 μm, the adhesion between the conductive filler 35 and the upper cross electrode 12 and the lower cross electrode 22 is sufficiently improved. The upper cross electrode 12 and the lower cross electrode 22 are connected to each other in a good conduction state, and the distance between the substrates in the vicinity of the region where the cross material 33 is provided and the spacer in another region are strengthened. 31 (difference in liquid crystal layer thickness)
Of the liquid crystal display element has almost no influence on the electro-optical characteristics of the liquid crystal display element, and good display quality without display unevenness can be obtained.

In the third embodiment, as shown in FIG. 6, a plurality of conductive fillers 35 having the same diameter are mixed in one cloth material 33.
The plurality of conductive fillers mixed therein have a diameter 3 μm larger than the diameter of the spacer 31 mixed in the sealing material 30.
It is preferable to make them different from each other in a range larger by 4 μm.

FIG. 7 is a cross-sectional view of a cross electrode connection portion in a substrate bonding region of a liquid crystal display device according to a fourth embodiment of the present invention, which is formed by a sealing material.

In the liquid crystal display element of this embodiment, the cross member 33 has a diameter 3 μm to 4 μm larger than the diameter of the spacer 31 mixed in the sealing member 30, and each of the diameters is different from that of the compression deformation. A plurality of conductive fillers (granular fillers) are mixed therein. In this embodiment, conductive fillers 35a and 35b having two kinds of diameters are mixed in the sealing material 30.

In the liquid crystal display device of this embodiment, two kinds of conductive fillers 35a and 35b having different diameters are mixed in the cloth material 33. Since the embodiment is the same as that of the embodiment, the same description is given to the drawings and the same explanation is omitted.

In this embodiment, for example, when the diameter of the spacer 31 mixed in the sealing material 30 is 7 μm, the conductive fillers 35 a, 35
b, one conductive filler 35a has a diameter of 10 μm.
m, the diameter of the other conductive filler 35b is set to 11 μm, and the mixing amount of the large-diameter conductive filler 35b is reduced to 1/5 of the mixing amount of the small-diameter conductive filler 35a.
It is desirable to set it to 1/10.

According to this embodiment, in the cloth material 33, the spacer 31 having a diameter mixed with the sealing material 30 is used.
Of the upper film substrate 10 and the lower film substrate 20 due to environmental conditions such as temperature and humidity, because a plurality of conductive fillers 35a and 35b each having a diameter of 3 μm to 4 μm larger than the diameter of each of them and having different diameters are mixed. The upper cross electrode 12 and the lower cross electrode 2
2 can be maintained in good condition, and the reliability can be further improved.

In this embodiment, the conductive fillers 35a and 35b mixed in the cloth material 33 are
As shown in FIG. 6, it is preferable that the conductive fillers 35b having a large diameter exist in the central portion of the cloth material 33 and the conductive fillers 35a having a small diameter exist in the outer peripheral portion. Conductive filler 35b with large diameter
May be present.

In the third and fourth embodiments,
The upper and lower cross electrodes 12 and 22 are formed in the substrate joining region by the sealing material 30 as in the first embodiment described above, and the cross material 33 is provided to penetrate the sealing material 30. When the cross electrodes 12 and 22 are electrically connected to each other using the cross material 33, the upper and lower cross electrodes 12 and 22 are formed in the substrate bonding region of the sealing material 30 (outside or inside the nearby substrate bonding region). And the cross electrodes 12, 2 between the upper and lower film substrates 10, 20.
The cloth material 33 may be provided in a region where 2 faces each other.

Further, in the first to fourth embodiments, the upper cross electrode 12 formed on the upper film substrate 10 is provided at the substrate edge along the terminal arrangement portion 20a of the lower film substrate 20, The upper cross electrode 12 may be provided at a substrate edge along a side edge of the lower film substrate 20 other than the terminal arrangement portion 20a. In this case, the lower cross electrode 22 provided on the lower film substrate 20 is connected to the upper cross electrode 22. The lower cross electrode 22 of the plurality of terminal electrodes 23 and 24 formed in the terminal array portion 20 a of the lower film substrate 20 while being formed so as to face the electrode 12.
2 may be connected to the scanning electrode terminal electrode 24 via a lead wire.

In the first to fourth embodiments, a material which can be compressed and deformed is used as the conductive filler. However, a material having a constant shape with little compression deformation may be used.
In that case, the upper film substrate 10 and the lower film substrate 2
0 is greatly deformed, the adhesion between the conductive filler and the upper and lower cross electrodes 12 and 22 is increased, and the electrical resistance of the contact portion can be reduced.

Although the liquid crystal display devices of the first to fourth embodiments are of the simple matrix type, the present invention can also be applied to an active matrix type or segment type liquid crystal display device. .

[0075]

According to the liquid crystal display device of the present invention, a plurality of insulating spacers having a predetermined diameter and a diameter of the spacer are provided on a frame-like sealing material for joining the first film substrate and the second film substrate. And a plurality of compressible deformable conductive fillers having a diameter of 1 μm to 3 μm larger than the first and second conductive fillers.
The first and second cross electrodes are electrically connected to each other by a conductive filler in a region where the first and second cross electrodes provided on the film substrate face each other. And the second cross electrode can be connected in a good conduction state, and good display quality without display unevenness can be obtained.

In the liquid crystal display device according to the present invention, the first cross electrode and the second
A side including a region facing the cross electrode is formed wider than the other sides, and the first and second cross electrodes face each other over substantially the entire width of the side of the sealing material. Preferably, by doing so, more of the conductive filler mixed in the sealing material in a dispersed state is sandwiched between the first and second cross electrodes, and these cross electrodes are further brought into a more conductive state. To improve the reliability.

Further, another liquid crystal display element according to the present invention is characterized in that the first cross electrode between the first and second film substrates and the second cross electrode oppose each other, 3 μm larger than the diameter of the insulating spacer mixed in a dispersed state with the frame-shaped sealing material joining the film and the second film substrate.
The first and second cross electrodes are electrically connected to each other by mixing a compressible deformable conductive filler having a diameter of m to 4 μm and having a larger diameter.
The first cross electrode and the second cross electrode can be connected in a good conduction state, and good display quality without display unevenness can be obtained.

In the liquid crystal display device of the present invention, a plurality of conductive fillers each having a diameter larger than the diameter of the spacer mixed into the sealing material by 3 μm to 4 μm and having different diameters are provided in the cloth material. It is preferable to mix the first cross electrode and the second cross electrode with respect to the undulation and expansion / contraction of the first and second film substrates due to environmental conditions such as temperature and humidity. The conductive state with the cross electrode can be kept good, and the reliability can be further improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a liquid crystal display device according to a first embodiment of the present invention.

FIG. 2 is a view showing an insulating spacer and a conductive filler mixed in a frame-shaped sealing material in the first embodiment.

FIG. 3 is a cross-sectional view of a cross electrode connection portion in a substrate bonding region of the liquid crystal display element of the first embodiment using a sealing material.

FIG. 4 is an exploded perspective view of a liquid crystal display device according to a second embodiment of the present invention.

FIG. 5 is an exploded perspective view of a liquid crystal display device according to a third embodiment of the present invention.

FIG. 6 is a cross-sectional view of a cross electrode connection portion in a substrate bonding region of a liquid crystal display element of a third embodiment using a sealing material.

FIG. 7 is a cross-sectional view of a cross electrode connection portion in a substrate bonding region of a liquid crystal display element according to a fourth embodiment of the present invention, which is formed by a sealing material.

[Explanation of symbols]

 Reference Signs List 10 upper substrate (first substrate) 11 scanning electrode (first electrode) 12 upper cross electrode (first cross electrode) 13 lead wiring 20 lower substrate (second substrate) 20a terminal arrangement Part 21: Signal electrode (second electrode) 22: Lower cross electrode (second cross electrode) 23, 24: Terminal electrode 25: Lead wiring 30: Seal material 31: Spacer 32: Conductive filler 33: Cross material 34 ... Resin 35,35a, 35b ... Conductive filler

Claims (4)

[Claims] 1. A first film substrate and a second film substrate having a terminal arrangement portion protruding outside of the first film substrate are joined via a frame-shaped sealing material, and the first and second film substrates are joined together. A liquid crystal layer is provided in a region between the second film substrates surrounded by the sealant, and the first film substrate of the mutually facing inner surfaces of the first film substrate and the second film substrate At least one first electrode formed in a region surrounded by the sealing material, and at least one first cross formed in a substrate bonding region formed by the sealing material and connected to the first electrode An electrode provided on the inner surface of the second film substrate, a plurality of second electrodes facing the first electrode, a second cross electrode facing the first cross electrode, and the terminal Array type in array section A plurality of terminal electrodes connected to the plurality of second electrodes and the second cross electrode, respectively; a plurality of insulating spacers having a predetermined diameter,
A plurality of conductive fillers having a diameter 1 μm to 3 μm larger than the diameter of the spacer are mixed in a dispersed state,
The distance between the first and second film substrates is regulated by the plurality of spacers, and the filler in a region of the plurality of conductive fillers where the first cross electrode and the second cross electrode face each other. Wherein the first and second cross electrodes are electrically connected to each other. 2. A side including a region where a first cross electrode and a second cross electrode face each other is formed wider than other sides of each side of the frame-shaped sealing material. 2. The liquid crystal display device according to claim 1, wherein the second cross electrode and the second cross electrode face each other over substantially the entire width of the side of the sealing material. 3. A first film substrate and a second film substrate having a terminal arrangement portion protruding outside the first film substrate are joined via a frame-shaped sealing material, and the first and second film substrates are joined together. A liquid crystal layer is provided in a region between the second film substrates surrounded by the sealant, and the first film substrate of the mutually facing inner surfaces of the first film substrate and the second film substrate At least one first electrode formed in a region surrounded by the sealing material, and at least one first electrode formed in or near a substrate bonding region formed by the sealing material and connected to the first electrode. One cross electrode is provided,
On the inner surface of the second film substrate, a plurality of second electrodes facing the first electrode, a second cross electrode facing the first cross electrode, and an array formed in the terminal array. A plurality of terminal electrodes respectively connected to the plurality of second electrodes and the second cross electrode; and a plurality of insulating spacers having a predetermined diameter mixed with the sealing material in a dispersed state. The first
The distance between the first cross electrode and the second film substrate is regulated, and the first cross electrode and the second cross electrode between the first and second film substrates are opposed to each other.
And a cloth material in which a conductive filler having a diameter 3 μm to 4 μm larger than the diameter of the spacer is mixed with a resin adhered to the second film substrate, and the first and second materials are mixed by the conductive filler of the cloth material. A liquid crystal display device, wherein two cross electrodes are electrically connected. 4. A cloth material, wherein a plurality of conductive fillers each having a diameter 3 μm to 4 μm larger than the diameter of the spacer mixed with the sealing material and having different diameters are mixed. 4. The liquid crystal display device according to 3.