JP3494993B2 - Method for manufacturing liquid crystal display device, substrate for liquid crystal display device, and liquid crystal display device - Google Patents

Description

Detailed Description of the Invention

TECHNICAL FIELD The present invention relates to a method for manufacturing a liquid crystal display device in which spacers are selectively arranged by applying a voltage to electrodes, a substrate for a liquid crystal display device, and a liquid crystal display device.

2. Description of the Related Art Conventionally, in liquid crystal display devices, it is known that spacers are arranged between a pair of insulating substrates in order to keep a constant distance between the pair of insulating substrates having electrodes. There is. Since the distance between the pair of insulating substrates, that is, the layer thickness of the liquid crystal layer, affects the light transmittance, good display cannot be performed unless it is kept constant over the entire display area of the liquid crystal display device. . Therefore, conventionally, a spacer such as a glass fiber or a spherical plastic bead is arranged between a pair of insulating substrates to keep the layer thickness of the liquid crystal layer constant over the entire display region.

These spacers are sprayed (dry sprayed) from a nozzle together with a compressed gas after forming an alignment film, or mixed with a volatile liquid to spray the liquid. Application (wet application)
Then, it is uniformly dispersed on the alignment film. After that, a pair of insulating substrates are bonded together, and a liquid crystal such as a nematic liquid crystal is filled between the pair of substrates in a state where the spacer is sandwiched between the pair of insulating substrates.

However, when the spacers are arranged on the pixel electrodes in the display area, light leakage from the spacers causes the aperture ratio to be substantially reduced, resulting in a problem such as uneven display or reduced contrast. Was there. As a result, in recent years, a spacer dispersion technique for controlling the cell thickness has been actively developed in order to improve the display quality of the liquid crystal display device.

As a method for solving this problem, Japanese Patent Application Laid-Open No. Hei 3
In JP-A-293328 and JP-A-4-204417, an electrode on one insulating substrate is charged, and spacers charged to the same polarity as this electrode are dispersed on the insulating substrate, thereby forming a region without an electrode. There has been proposed a method of selectively arranging spacers on the substrate. When spacers are scattered on the substrate for a liquid crystal display device using these methods, an appropriate repulsive force acts on the spacers in the display electrode region, and the spacers are evenly arranged where there is no electrode, that is, between the electrodes.

On the other hand, in the case of manufacturing a liquid crystal display device, a display transparent electrode pattern is formed on a liquid crystal display device substrate which is arranged to face each other, and the periphery thereof is formed of the same material as the display transparent electrode. Alignment mark for connecting the transparent electrode for display and TCP, alignment mark for alignment film or sticker printing, alignment mark for bonding a pair of substrates for liquid crystal display device, and presence or absence of transparent electrode for display Dummy electrodes and the like have been formed to prevent a difference in cell thickness.

The electrode pattern formed on such an insulating substrate for a liquid crystal display device is as shown in FIGS.
On the insulating substrate 1, a stripe-shaped display electrode 3 to which an anti-static electrode 28 is connected, a dummy electrode 2 for cell thickness adjustment
1, the functional electrode 27a, the functional electrode 27b, and the functional electrode 27c were formed. The dummy electrode 21, the functional electrode 27a, the functional electrode 27b, and the functional electrode 27c are electrically floating (open circuit), and the dummy electrode 21 is not formed except for the necessary portions. It was

Therefore, in the above-mentioned method, an area provided in the vicinity of the display electrode area where no electrode exists or an electrode existing in an electrically floating state (dummy electrode, functional electrode)
In the region, the repulsive force does not act on the spacer, the balance of the repulsive force with the display electrode region is lost, and the spacers are intensively arranged and aggregated there. That is, the spacer is blown to a place where repulsive force does not work.

When the substrates are bonded together in this state, the spacers are intensively arranged, the cell thickness of the agglomerated portion (the portion where repulsive force does not work) becomes large, and there is a problem that a uniform cell thickness cannot be obtained. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and enables spacers to be uniformly arranged on a substrate to make the cell thickness uniform over the entire substrate. An object of the present invention is to provide a method for manufacturing a liquid crystal display device having high properties, a substrate for a liquid crystal display device, and a liquid crystal display device using the same.

The present invention is a liquid crystal display device comprising applying a voltage having the same polarity as the charging polarity of a spacer to a plurality of electrodes formed on a substrate and scattering the spacers by utilizing the repulsive force acting on the spacers. The method of manufacturing a liquid crystal according to claim 1, wherein the spacers are dispersed by making an electric field in the vicinity of an electrode region including at least the plurality of electrodes on the substrate substantially uniform with an electric field in a central portion of the electrode region including the plurality of electric fields. It is a manufacturing method of a display device.

The present invention is also a substrate for a liquid crystal display device used in the method for manufacturing the above liquid crystal display device. The present invention also provides a liquid crystal display device manufactured by the method for manufacturing a liquid crystal display device.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a spacer spraying device used in an embodiment of the present invention. FIG. 2 is a plan view showing an insulating substrate according to the embodiment of the present invention. FIG. 3 is an enlarged plan view showing the lower left electrode on the insulating substrate according to the embodiment of the present invention in FIG. FIG. 4 is a functional electrode 27 on an insulating substrate according to the embodiment of the present invention in FIG.
It is a plane enlarged view showing a. 5 is a functional electrode 27 on the insulating substrate according to the embodiment of the present invention in FIG.
It is a plane enlarged view showing c. FIG. 6 is a conceptual diagram illustrating a method of arranging spacers by an electric field according to the embodiment of the present invention. FIG. 7 is a cross-sectional view showing the liquid crystal display device according to the embodiment of the present invention. FIG. 8 is a schematic configuration diagram of the liquid crystal display device according to the embodiment of the present invention. Figure 9
FIG. 6 is a plan view showing a conventional insulating substrate. Figure 10
FIG. 10 is an enlarged plan view showing the lower left electrode on the conventional insulating substrate in FIG. 9. FIG. 11 is an enlarged plan view showing the functional electrode 27a on the conventional insulating substrate in FIG. FIG. 12 is an enlarged plan view showing the functional electrode 27a on the conventional insulating substrate in FIG.

Explanation of reference numerals 1 Insulating substrate 3 display electrodes 4 color filters 5 Black Matrix 6 overcoat 7 liquid crystal 8 spacers 9 Alignment film 10 containers 11a nozzle 15 electrodes 17 Piping 18 conductors 21, 21a, 21b Dummy electrodes 22 Display electrode area 23 Insulating film 24 Seal material 25 Spacer in seal 26 common conducting wire 27a, 27b, 27c Functional electrode 28 Electrostatic countermeasure electrode

DISCLOSURE OF THE INVENTION The present invention is described in detail below. The present invention is a method for manufacturing a liquid crystal display device, which comprises applying a voltage having the same polarity as the charging polarity of a spacer to a plurality of electrodes formed on a substrate and scattering the spacers by utilizing the repulsive force acting on the spacer. Thus, the spacers are dispersed by making the electric field in the vicinity of the electrode region composed of at least a plurality of electrodes on the substrate substantially uniform with the electric field in the central part of the electrode region composed of a plurality of electrodes. Is the way.

That is, by making the electric field in the vicinity of the electrode region composed of at least a plurality of electrodes substantially uniform with the electric field in the central portion of the electrode region composed of a plurality of electrodes, it becomes possible to disperse the spacers evenly, resulting in the cell thickness. It is possible to manufacture a liquid crystal display device having excellent uniformity.

Here, the vicinity of the electrode region composed of a plurality of electrodes on the substrate is not particularly limited, and refers to, for example, the inside of the region including the dividing line which becomes the liquid crystal display device, but the cell thickness is uniform according to the specifications. The range may be determined in a timely manner so that the sex can be maintained. Further, the uniform electric field means that the cell thickness is uniform so that the cell thickness can be kept uniform. The present invention can be applied regardless of whether the electric field is an attractive field or a combined field of repulsive force and attractive force.

Examples of the substrate include a glass substrate, a resin substrate, and a metal substrate having a plurality of electrodes on the surface thereof. However, when a metal substrate is used, it is necessary to provide an insulating layer on the metal substrate so that the electrodes formed on the surface do not short-circuit.

The above-mentioned electrode is not particularly limited, and examples thereof include a transparent electrode, and a linear transparent electrode can be used. Further, it is possible to form a stripe-shaped electrode formed by arranging linear transparent electrodes in parallel on the substrate. The striped electrode is used as a so-called display electrode in a liquid crystal display device. Further, the electrode region composed of the plurality of electrodes,
A region forming an electrode group composed of a plurality of electrodes,
When a plurality of electrodes are used as display electrodes, it means a display electrode region.

The spacer is not particularly limited and includes, for example, metal fine particles; synthetic resin fine particles; inorganic fine particles; light-shielding fine particles in which pigment is dispersed in synthetic resin; fine particles colored with dyes; adhesiveness by heating, light, etc. Examples of the particles include metal particles, synthetic resin particles, inorganic particles, and the like whose surfaces are plated with a metal, and are used for adjusting the cell thickness in a liquid crystal display device. The spacers may be sprayed by either a dry method or a wet method. In the above-mentioned wet spraying, the spacers are dispersed in a mixed solvent such as water or alcohol and sprayed, but even in this case, the spacers are charged, and therefore the effect of the present invention is not impaired. However, the larger the amount of charge on the spacers, the higher the placement accuracy, and therefore dry spraying is preferable.

In the above-described method for manufacturing a liquid crystal display device, dummy electrodes are provided on the substrate in the vicinity of an electrode region including at least a plurality of electrodes without any gap, and a voltage having the same polarity as that of the electrodes including a plurality of electrodes is applied to the dummy electrodes. Is preferred. Therefore, it is possible to form an electric field in an electrode-free region in the vicinity of an electrode region composed of at least a plurality of electrodes on the substrate, and it is possible to arrange spacers uniformly.

The dummy electrodes include conductive electrodes arranged and formed outside the electrode region (electrode group) composed of a plurality of electrodes in the range. At this time, it is preferable that the dummy electrodes are formed in stripes or blocks. When the solid dummy electrode is provided, the spacer is not arranged at that portion due to the repulsive force, and it becomes difficult to control the cell thickness in the vicinity of the electrode region including a plurality of electrodes.

The dummy electrode is orthogonal to the plurality of electrodes,
And / or preferably provided in parallel. That is, the dummy electrode is orthogonal to the plurality of electrodes in the effective display area, and /
Alternatively, by providing them in parallel, it is possible to avoid variations in the spacer arrangement amount between the linear portion (effective display area) and the bent portion (leading portion) of the electrode, and the number of spacers scattered in the effective display area and the dummy. It is possible to equalize the number of spacers scattered in the electrode region, and it is possible to dispose spacers uniformly in the effective display region and the dummy electrode region.
Here, it is preferable that the lead-out portion of the electrode is also linear. However, at present, because of TCP connection, it is indispensable to provide a bent portion on the electrode.

In the method of manufacturing a liquid crystal display device described above, it is preferable that a functional electrode is provided on the substrate in the vicinity of an electrode region composed of at least a plurality of electrodes, and a voltage having the same polarity as that of the plurality of electrodes is applied to the functional electrode. That is, by applying a voltage having the same polarity as that of the plurality of electrodes to the functional electrode, it is possible to form an electric field on the functional electrode, and a uniform spacer can be arranged.

The above-mentioned functional electrode is not particularly limited,
For example, a TCP connection alignment mark, a division alignment mark, an identification mark, an exposure alignment mark, a bonding alignment mark, and the like can be given. At this time, if the inside of the alignment mark is hollow, it is preferable to form a dummy electrode also in that portion.

In the method of manufacturing the liquid crystal display device, one or more dummy electrodes are provided in parallel with the plurality of electrodes on the outer side of the electrode region composed of the plurality of electrodes on the substrate, and the dummy electrodes have a voltage of the same polarity as the plurality of electrodes. Is preferably applied.

Therefore, it is possible to form a continuous electric field between the outermost electrodes of the plurality of electrodes, which is equivalent to the central part of the electrode region composed of the plurality of electrodes, and the center of the electrode region composed of the plurality of electrodes. It is possible to make the arrangement of the spacers uniform with the outside. At this time, the larger the number of dummy electrodes provided in parallel is, the more preferable, but it may be appropriately determined according to the design rule.

In the above-described method of manufacturing a liquid crystal display device, it is preferable that the electrode area formed of at least a plurality of electrodes on the substrate and the electrode areas in the vicinity of the electrode area formed of a plurality of electrodes have substantially the same interelectrode width. That is, a uniform electric field can be formed by making the inter-electrode width substantially the same in and around the effective display area.

In the above method of manufacturing a liquid crystal display device, it is preferable that the voltage applied to the electrodes and the plurality of electrodes in the vicinity of the electrode region composed of at least a plurality of electrodes on the substrate be the same voltage. Therefore, it becomes possible to form a uniform electric field, and productivity is also improved. The method for manufacturing a liquid crystal display device described above, in order to apply a voltage to an electrode in the vicinity of an electrode region composed of at least a plurality of electrodes on a substrate and a plurality of electrodes, a common conductive line is provided in an outer peripheral portion in the vicinity of the electrode region composed of a plurality of electrodes. Is preferably formed of the same material as the plurality of electrodes, and a voltage is applied to each electrode. Therefore, it becomes possible to manufacture the liquid crystal display device with good cost performance and workability.

In the method of manufacturing a liquid crystal display device described above, it is preferable that the common conductive line and the plurality of electrodes are connected on the side of the connection portion of the plurality of electrodes with the external circuit, and the other side is inside the seal resin. That is, since the substrate on which the spacers are scattered is separated from the opposing substrate by bonding, the connection portion with the external circuit is protected against electrolytic corrosion, and the other portion is not extended to the outside of the seal resin.
The problem of electrolytic corrosion does not occur. On the other hand, when the common conductive line is connected at the other connecting part to the external circuit, it is necessary to protect the part after the substrate is cut.

The present invention is also a substrate for a liquid crystal display device used in the method for manufacturing the above liquid crystal display device. The present invention also provides a liquid crystal display device manufactured by the method for manufacturing a liquid crystal display device.

Embodiments of the present invention will be specifically described below with reference to FIGS. FIG. 1 is a schematic view showing a spacer spraying device used in the embodiment of the present invention. A nozzle 11a for spraying and spraying the charged spacers 8 is provided at the upper end of the clean container 10 in a closed or near-closed state. A supply device (not shown) for supplying the spacer 8 and nitrogen gas is connected to the nozzle 11 a via a pipe 17. Below the container 10, an insulating substrate 1 made of glass or the like on which the display electrodes 3 are formed is arranged, and conducting wires 18 for applying a voltage to the display electrodes 3 to form an electric field are provided. Note that the electric field may be formed by the electrode 15 provided in the spacer spraying device, without applying a voltage to the display electrode 3 to form the electric field.

As a method for charging the spacer 8, a voltage is applied to the spacer 8 by a charger (not shown) provided in the spraying device, or the spacer is charged in a metal tube such as stainless steel or a resin. A method of passing through the inside of a pipe and charging by friction is known, and any of these methods may be used.

2 to 5 are schematic views showing electrode patterns according to the present invention. As shown in FIGS. 2 to 5, the striped display electrode 3, the dummy electrode 21 a, and the dummy electrode which are connected so as to be applied with a voltage from the common conductive line 26 formed so as to surround the insulating substrate 1. 21b, the functional electrode 27a, the functional electrode 27b, and the functional electrode 27c.
Are formed. Here, the common conducting wire is provided as a means for applying a voltage to each electrode, but other methods, for example, a voltage may be applied directly to each electrode by using a probe pin or the like, or static electricity may be applied. You may use the method of charging.

Further, the dummy electrodes 21a and 21b are electrodes provided without a gap in order to form an electric field in a region other than the display electrode, and in particular, the dummy electrode 21b continuously forms an electric field in the display electrode region. For this purpose, the same pattern as that of the display electrodes is provided in parallel with the display electrodes. Further, the functional electrode 27a is an alignment mark for TCP connection, the functional electrode 27b is an alignment mark for exposure and bonding, and the functional electrode 27c is an alignment mark for division. In this case, the dummy electrode and the functional electrode are produced at the same time during the exposure etching process of the display electrode.

Here, as shown in FIGS. 2 and 3, the vicinity of the display electrode region on the insulating substrate is designed to be a range sufficiently including the functional electrode 27c, and is a region surrounded by the common conducting line. . And in the vicinity of this display electrode region,
In order for the electric field to be the same as the central portion of the display electrode region inside this, (1) dummy electrodes 21a to which a voltage of the same polarity as the display electrode 3 is applied are provided without gaps, and (2) dummy electrodes 21
a is formed so as to be orthogonal to the display electrode 3, and is designed so that (3) a voltage having the same polarity as that of the display electrode 3 is applied to the functional electrodes 27a, 27b, and 27c, and (4) the display electrode 3 A dummy electrode 21b parallel to the display electrode 3 on the outside of the
The dummy electrode 21b is formed so that a voltage having the same polarity as that of the display electrode 3 is applied, and (5) the inter-electrode widths of the electrodes in the display region and the display electrode region are substantially the same,
(6) The common conducting line 26 is designed so that the voltages applied to the display electrode 3 and various other electrodes are the same, and (7) the common conducting line 26 is made of the same material as the display electrode 3. (8) The common conductive line 26 and the display electrode 3 are connected to each other on the side of the connection portion of the display electrode 3 to the external circuit, and the other side is to the inside of the seal resin.

Then, as shown in FIG. 6, the charged spacers are arranged so as to move in the valleys of the repulsive force. Further, in the present invention, as described above, at least in the region including the display electrode region and its vicinity on the insulating substrate. Since a similar electric field is formed, the spacers can be evenly arranged. Incidentally, the solid line in FIG. 6 schematically shows the magnitude of the repulsive force applied to the spacer, and the magnitude of the repulsive force acting on the spacer is shown by a semi-circular shape of “upward convex”.

Although the simple matrix type liquid crystal display device is used in the above-mentioned embodiments, the present invention is not limited to the simple matrix type liquid crystal display device, and a ferroelectric liquid crystal display device or a TFT type liquid crystal device. Of course, it can be used in a liquid crystal display device such as a display device.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail with reference to Examples.
The invention is not limited to these examples only.

Example 1 As a pair of insulating substrates made of soda glass having outer dimensions of 370 × 480 mm and a thickness of 0.7 mm, one insulating substrate 1 has a black matrix 5 as a light-shielding film.
Then, the color filter 4 formed of R, G, and B and the overcoat 6 for protecting the color filter 4 were formed. A 300 nm thick ITO film is formed on the overcoat 6.
The stripe-shaped display electrode 3 made of is formed, the alignment film 9 made of a polyimide resin is further formed, and the alignment treatment is performed.

The other insulating substrate 1 has a thickness of 300 nm.
An electrode pattern made of ITO was formed, and an insulating film 23 was formed. In some cases, the insulating film 23 may not be formed. Further, an alignment film 9 made of polyimide resin
Was formed and subjected to orientation treatment. Here, as the electrode pattern, as shown in FIGS. 3 to 5, the stripe-shaped display electrodes 3 are formed in the effective display area with a width of 270 μm and an interval of 30 μm, and the dummy electrodes 21a are formed with a line width of 35 μm and a line gap of 35 μm.
The dummy electrodes 21b are continuously formed on the display electrodes 3 and six dummy electrodes having the same size are arranged. The dummy electrodes 21a are arranged as much as possible around the functional electrodes 27a, 27b and 27c. . Furthermore, the functional electrode 27b
An annular dummy electrode 21a was also arranged around the area.

Then, on the other insulating substrate 1,
As a spacer, BBS-605 which is a synthetic resin fine particle
10-PH (manufactured by Sekisui Fine Chemical Co., Ltd.) was used to negatively charge and spray. At this time, in FIG. 2, −2 kV was applied to the common conducting line 26. as a result,
In the vicinity of the display electrode region (here, inside the common conducting line) set so that the electric field is uniform, the spacer is not aggregated and arranged, and the display electrode portion, the dummy electrode portion,
They were evenly arranged on the functional electrode portion.

On the other hand, the sealing material 24 was applied to the insulating substrate 1 on which the color filter 4 was formed by the screen printing method. Glass beads to be the spacer 25 in the seal were mixed in the sealing material 24. Next, the pair of insulating substrates 1 are bonded to each other, and the temperature is set to 180 ° C. for 0.8.
After heating and pressurizing at kg / cm ² and after-baking treatment at 150 ° C., cutting was performed along a cutting line to separate unnecessary portions. After that, inject the liquid crystal 7,
A liquid crystal display device in which a pair of insulating substrates are bonded (see FIG. 7).
And 8) were prepared. The manufactured liquid crystal display device is
Since the spacers are evenly distributed and arranged in the surface of the liquid crystal display device and the cell thickness is uniform, and the spacers are not arranged on the display electrodes, the display characteristics are high contrast and high quality. .

Comparative Example 1 A liquid crystal display device was produced in the same manner as in the example except that the conventional substrate for liquid crystal display device shown in FIGS. As a result, the spacer is an open circuit dummy electrode part where the electric field is weak,
There was a region where the functional electrode portion and the electrode were not formed, or a region where the spacers were not arranged at all due to the imbalance of the electric field. The produced liquid crystal display device had poor cell thickness uniformity.

INDUSTRIAL APPLICABILITY According to the present invention, a spacer can be arranged between electrodes, and a liquid crystal display device can be manufactured without sacrificing the aperture ratio. Spacers similar to those in the display electrode region can be arranged in regions outside the display electrodes of the device, and a liquid crystal display device having a uniform cell thickness in the plane of the liquid crystal display device can be provided.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Makoto Nakahara 22-22 Nagaike-cho, Abeno-ku, Osaka-shi, Osaka, Japan Inside Sharp Corporation (72) Takatoshi Kira 22-22 Nagaike-cho, Abeno-ku, Osaka, Osaka, Japan No. 22 within Sharp Corporation (72) Daisuke Ikesugi 22-22 Nagaike-cho, Abeno-ku, Osaka-shi, Osaka Prefecture Japan (72) Inventor Akihiko Tateno 3 Kawashima-Higashishiro-cho, Nishikyo-ku, Kyoto City, Kyoto Prefecture, Japan Exeri Katsura 208 (72) Inventor, Masaki Ban, Tsurugaoka 5-chome, Oi-cho, Iruma-gun, Saitama Prefecture, Japan 3-3, Nisshin Seifun Co., Ltd. (72) Inventor Hiroshi Murata Nihombashi Koami, Chuo-ku, Tokyo, Japan 14-1 Machi Nisshin Engineering Co., Ltd. (72) Inventor Masaaki Kubo 14-1 Nihombashi Koamicho, Chuo-ku, Tokyo Japan Engineering Co., Ltd. (56) Reference JP 10-133215 (JP, A) JP 4-204417 (JP, A) JP 5-333345 (JP, A) (58) Fields investigated (Int .Cl. ⁷ , DB name) G02F 1/1339 G02F 1/1343

Claims (11)

(57) [Claims] 1. A method of manufacturing a liquid crystal display device, comprising applying a voltage having the same polarity as a charging polarity of a spacer to a display electrode formed on a substrate and scattering the spacer by utilizing a repulsive force acting on the spacer. A dummy electrode and a functional electrode are provided without a gap outside the display electrode region on the substrate,
The method of manufacturing a liquid crystal display device, wherein the spacers are dispersed by making an electric field formed by the dummy electrodes and the functional electrodes uniform with an electric field formed by the display electrodes. 2. The method for manufacturing a liquid crystal display device according to claim 1, wherein a voltage having the same polarity as that of the display electrode is applied to the dummy electrode. 3. The method for manufacturing a liquid crystal display device according to claim 2, wherein the dummy electrode is provided orthogonal to and / or parallel to the display electrode. 4. The method of manufacturing a liquid crystal display device according to claim 1, wherein a voltage having the same polarity as that of the display electrode is applied to the functional electrode. 5. The display device according to claim 1, wherein one or more dummy electrodes are provided outside the display electrode region in parallel with the display electrode, and a voltage having the same polarity as that of the display electrode is applied to the dummy electrode. Liquid crystal display device manufacturing method. 6. The display electrodes and the dummy electrodes are made to have the same inter-electrode width.
A method for manufacturing the liquid crystal display device described. 7. The liquid crystal display device according to claim 1, wherein the voltages applied to the display electrode, the dummy electrode, and the functional electrode are the same voltage. Method. 8. A common conductive line is formed of the same material as the display electrode on the outer periphery of the dummy electrode and the functional electrode in order to apply a voltage to the display electrode, the dummy electrode, and the functional electrode. A method for manufacturing a liquid crystal display device according to claim 1, wherein a voltage is applied to the electrodes. 9. The liquid crystal display device according to claim 8, wherein the connection between the common conducting line and the display electrode is on the side of the connection portion of the display electrode with the external circuit, and the other side is inside the seal resin. Manufacturing method. 10. A stripe-shaped display electrode, a dummy electrode a, which are connected so that a voltage is applied from a common conductive line,
A dummy electrode b and a functional electrode are provided, the dummy electrodes a and b are electrodes provided in a region other than the display electrode region without a gap, and the dummy electrode a is orthogonal to the display electrode. The dummy electrode b is formed in parallel with the display electrode, and is applied with a voltage having the same polarity as the display electrode, and the functional electrode is the display electrode. It is designed so that a voltage of the same polarity as that of the electrodes is applied, the inter-electrode width of the display electrode and the dummy electrode is the same, and the voltage applied to all the electrodes by the common conducting line is the same voltage. The substrate for a liquid crystal display device, wherein the common conducting line is formed of the same material as that of the display electrode. 11. The method according to claim 1, 2, 3, 4, 5, 6, 7,
8. A liquid crystal display device manufactured by the method for manufacturing a liquid crystal display device according to 8 or 9.