JPH08313897A - Liquid crystal display device and its production - Google Patents

Abstract

PURPOSE: To obtain a large-screen liquid crystal display device which is devised in the arrangement structure of polarizers and has a high display grade by previously providing a first substrate with the first polarizer and a second substrate with the second polarizer and disposing plural liquid crystal panels in juxtaposition between the first and second polarizers by adhesive parts. CONSTITUTION: Two sheets of the liquid crystal panels 2 of an active matrix type are connected in juxtaposition and are arranged between the reinforcing substrates 3 and 4. The polarizers 5, 6 are respectively arranged between the reinforcing substrates 3, 4 and the liquid crystal panels 2. The liquid crystal panels 2 are connected to each other by adhesives 20 and further, the polarizer 5 is stuck to the CF substrate 9 side and the polarizer 6 to the TFT substrate 10 side by adhesives 10. Since the polarizers 5, 6 are disposed on the substrates in such a manner, the application of an excess pressure on the liquid crystal panels 2 is averted. Even if, therefore, sealing members formed of fine patterns exist within the liquid crystal panels for the purpose of obscuring the connected part, the destruction of the sealing members by application of the local force thereon is averted.

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 used in AV (audiovisual) equipment and OA (office automation) equipment, and a manufacturing method thereof.

[0002]

2. Description of the Related Art In recent years, home-use televisions used as AV equipment and display devices used in OA equipment have been reduced in weight,
Thinning, low power consumption, high definition and large screen are required. Therefore, CRT (cathode ray tub
e), liquid crystal display (LCD), plasma display (P
DP), EL (electroluminescent) display device, LED
(Light emitting diode) With respect to display devices such as a display device, development and practical application of a large screen are in progress.

Among them, the liquid crystal display device has the advantages that the thickness (depth) can be remarkably thin, power consumption is small, and full-color display is easy as compared with other display devices. It is being used in various fields, and there are great expectations for larger screens.

On the other hand, in the liquid crystal display device, when the screen size is increased, the defective rate due to the disconnection of the signal line, the pixel defect and the like is rapidly increased in the manufacturing process, and the price of the liquid crystal display device is further increased. Such a problem occurs. Therefore, in order to solve this problem, a plurality of liquid crystal panels are connected to form a single multi-display type liquid crystal display device, and the screen is enlarged.

However, in the above-mentioned multi-display type liquid crystal display device in which liquid crystal panels are connected to each other, the connection part of the liquid crystal panel may be leaked from a gap generated in the connection part of each liquid crystal panel. It is easily noticeable. On the other hand, the applicant of the present application has previously filed Japanese Patent Application No.
No. 29395 proposes an active matrix type liquid crystal display device in which a connection portion between display screens is inconspicuous and a natural large screen image can be obtained. As a display mode of this liquid crystal display device, a normally white system of a TN (Twisted Nematic) mode is adopted.

As shown in FIG. 7, this liquid crystal display device 51 is provided.
Then, two liquid crystal panels 52 are joined together, and this is arranged between the reinforcing substrate 53 and the reinforcing substrate 54 and bonded. Further, the polarizers 55 and 56 are arranged on the outer surfaces of the both reinforcing substrates 53 and 54, respectively, and the backlight system 57 such as the cold cathode 71 is provided on the back surface (lower side in the drawing) of the liquid crystal panel 52 as a display panel. Is provided. A driver for controlling the image signal is omitted in the figure. The liquid crystal panel 52 modulates the light of the backlight system 57 according to the image information, so that the observer can observe the image information input to the liquid crystal panel 52. Further, in order to eliminate the uneven brightness of the cold cathode tubes 71, as shown in FIG. 8, a liquid crystal display device 81 in which a diffusion plate 72 is provided between the polarizer 56 and the backlight system 57.
In some cases. 9 shows the liquid crystal display device 51.
The liquid crystal panel 52 of 81 is connected together.

The liquid crystal panel 52 is a thin film transistor (TFT) formed in a matrix.
A TFT substrate 60 having a Trnsistor and a CF substrate 59 having a color filter (CF) formed in a matrix are bonded to each other with a sealing material 58 interposed therebetween. At this time, the TFT substrate 60 and C
The F substrate 59 and the F substrate 59 are arranged at a constant interval by a spacer 64, and the liquid crystal 61 is sealed between the both. Further, a non-translucent pattern (not shown) made of a non-translucent material on the CF substrate 59 and having a role of a shadow mask for preventing light leak and color fringing from adjacent pixels is formed between adjacent pixels. Are formed along the boundaries of.

The liquid crystal display devices 51 and 81 employ the following structure, for example, in order to make the connection between the liquid crystal panels 52 inconspicuous. That is, the TFT substrate 6 has adhesiveness such as an ultraviolet curable adhesive and the like.
0, the CF substrate 59, and the reinforcing substrates 53 and 54, an adhesive (refractive index adjusting material) 70 having substantially the same refractive index is used to connect the liquid crystal panels 52 to each other. The reinforcing substrates 53 and 54 are attached to each other by applying the adhesive 70.

Generally, when a plurality of liquid crystal panels are joined together, if the end faces of the joints of the panel substrates are in contact with a medium having a different refractive index (for example, air), light refraction occurs. Further, if the end surface becomes rough during processing, irregularities are formed there, and light is refracted and scattered. Due to these, the connection portion of the liquid crystal panel becomes conspicuous.

However, in the liquid crystal display devices 51 and 81, by using the adhesive 70, the liquid crystal panel 5
The refractive index can be adjusted at the connecting portion between the two members to prevent refraction / scattering of light, and a more natural image in which the connecting portion is less noticeable can be obtained.

[0011]

However, the above-mentioned liquid crystal display devices 51 and 81 have the following problems.

In the liquid crystal display devices 51 and 81, in order to make the connection between the liquid crystal panels 52 and 52 inconspicuous, the sealing material 58 located at the end of the connection is formed in a very thin pattern (width of 50 to 150 μm). are doing. Therefore, the sealing material 58 can seal the liquid crystal 61 in the liquid crystal panel 52, but is not excellent in strength resistance.

On the other hand, in the liquid crystal display devices 51 and 81,
The polarizers 55 and 56 are directly bonded to the reinforcing substrates 53 and 54. That is, the polarizers 55 and 56 with adhesive are attached using a roller or a squeegee. At this time, small air bubbles are caught in the adhesive, and the air bubbles are compressed and erased by an autoclave process.

As a result, a large pressure is locally applied to the reinforcing substrates 53 and 54 and the liquid crystal panel 52,
Therefore, the sealing material 58 used in the liquid crystal panel 52 may be crushed. Moreover, this polarizer 55.5
Since the step of attaching 6 corresponds to the final stage of the entire manufacturing process of the liquid crystal display devices 51 and 81, producing defects leads to a great decrease in efficiency in manufacturing.

Further, the polarizers 55 and 56 are very difficult to peel off once they are attached, and even if they are peeled off, a large stress is applied to the liquid crystal panel 52, which is not preferable.

Further, the polarizers 55 and 56 are directly exposed on the display surfaces of the liquid crystal display devices 51 and 81.
Since 5 and 56 are formed of a polymer film, they are easily scratched, have a lot of stains such as fingerprints, and are hard to remove. Therefore, the above-mentioned polarizers 55 and 56 are attached to the reinforcing substrate 5.
It is not preferable to attach it to the outside of 3.54.

In order to avoid such a problem, a method may be mentioned in which the polarizer is attached to another substrate in advance and the substrate is attached to the outside of the reinforcing substrate while the surface of the polarizer faces inward. According to this method, the substrate to which the polarizer is attached may be a simple glass substrate or plastic substrate, and thus any attachment method may be used. Further, when the polarizer is attached to the substrate, no pressure is directly applied to the liquid crystal panel.

However, in the above, since a pair of substrates for attaching the polarizer is additionally required, the entire liquid crystal display device becomes heavier and thicker accordingly. This is contrary to the advantages of liquid crystal display devices such as thin and lightweight,
Not a preferred solution.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a large-screen liquid crystal display device of high display quality in which the arrangement structure of the polarizer is devised.

[0020]

A liquid crystal display device according to a first aspect of the present invention has a first structure in order to solve the above problems.
A substrate, a second substrate arranged in parallel with the first substrate, a first polarizer provided in advance on the first substrate, and a second substrate provided in advance so as to face the first polarizer. A second polarizer,
It is characterized in that it is provided with an adhesive member that is filled between the first polarizer and the second polarizer, and that is provided with a plurality of liquid crystal panels arranged in parallel with both substrates in parallel with each other between the two polarizers.

The liquid crystal display device according to a second aspect of the present invention is the liquid crystal display device according to the first aspect, further comprising a diffusing member provided between the cold cathode tube and the second substrate. It has a feature.

A liquid crystal display device according to a third aspect of the present invention is the liquid crystal display device according to the first aspect, wherein the second substrate further has diffusivity for making the brightness of the cold cathode tubes uniform. It is characterized by that.

According to a fourth aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device, which comprises a step of providing a first polarizer on a first substrate,
Providing the second polarizer on the second substrate, and arranging the first polarizer and the second polarizer so as to face each other after the above step,
A step of filling an adhesive member between both the polarizers and arranging a plurality of liquid crystal panels in parallel between the both polarizers is provided.

[0024]

According to the structure of the first aspect, the first polarizer is previously provided on the first substrate, and the second polarizer is previously provided on the second substrate. The plurality of liquid crystal panels are arranged in parallel between the first and second polarizers by the filled adhesive member.

Since the first and second substrates are arranged so that the first and second polarizers face each other, it is not the first and second polarizers that are exposed on the display surface of the liquid crystal display device. The first and second substrates.

According to the structure of claim 2, in addition to the operation of claim 1, since the light from the cold cathode tube is diffused by the diffusing member, it is not affected by the uneven brightness of the cold cathode tube.

According to the structure of claim 3, in addition to the operation of claim 1, since the light from the cold cathode tubes is diffused by the second substrate, it is not affected by the uneven brightness of the cold cathode tubes.
As described above, according to the third aspect of the invention, since the second substrate also serves as the diffusing member, it is possible to reduce the thickness and the weight of the diffusing member.

According to the structure of claim 4, the first and second polarizers are provided on the first and second substrates, respectively, before the plurality of liquid crystal panels are arranged in parallel between the both polarizers. However, no pressure is applied to the liquid crystal panel by this process. In other words, when a plurality of liquid crystal panels are installed side by side between both polarizers, the polarizer is already provided on the substrate, so that pressure is not applied when the polarizer is provided on the substrate as in the conventional case. Does not add to the LCD panel.

[0029]

【Example】

[Embodiment 1] One embodiment of the present invention is shown in FIGS.
The explanation is based on the following. As shown in FIG. 1, the liquid crystal display device according to the present embodiment is a direct-viewing type liquid crystal display device 1. In the liquid crystal display device 1, two active matrix type liquid crystal panels 2 are arranged in parallel and connected to each other, and are arranged between a reinforcing substrate 3 and a reinforcing substrate 4. Further, a polarizer 5 and a polarizer 6 are arranged between the reinforcing substrate 3 and the reinforcing substrate 4 and the liquid crystal panel 2, respectively.

Furthermore, the rear surface of the liquid crystal panel 2 (lower side in the figure)
In addition, a backlight system 7 using the cold cathode 21 or the like as a light source is provided. A driver for controlling the image signal is omitted in the figure. In addition, in the present embodiment, a case where two liquid crystal panels 2 are connected to each other will be described. However, the present invention is not limited to this, and a plurality of liquid crystal panels 2 may be connected to further increase the screen size.

The liquid crystal panel 2 has an active matrix type liquid crystal panel structure using matrix-shaped active elements, and the TFT substrate 1 is provided with a sealing material 8 interposed therebetween.
0 and the CF substrate 9 are bonded in parallel and
It is formed by enclosing the liquid crystal 11 between the T substrate 10 and the CF substrate 9. At this time, the pixel electrode 1 described later
2 and the common electrode 13 are arranged so as to face each other.
In order to keep the cell gap of the liquid crystal panel 2 uniform,
A spacer 14 is provided between the TFT substrate 10 and the CF substrate 9.
It is effective to use plastic beads or the like as.

As shown in FIG. 2, on the TFT substrate 10, a scanning electrode (gate electrode) 15, a data electrode (source electrode) 16, and a thin film transistor (TFT) 17 arranged at the intersection of these electrodes, The pixel electrode 12 is formed. The TFT 17 is a field effect transistor using a semiconductor film, and controls the supply of the image signal to the pixel electrode 12. A thin film diode (TFD) may be used instead of the TFT.

A common electrode 13 is formed on the CF substrate 9.
Are formed and color display is performed, R (red), G (green), B (blue) corresponding to each pixel electrode 12 is further formed.
The color filter 18 and the non-translucent pattern 19 for separating each pixel are formed. The non-translucent pattern 19 is also called a black matrix and may be provided not only on the CF substrate 9 side but also on the TFT substrate 10 side.

This black matrix is provided for each pixel electrode 1
It is provided to block the incidence of light between the two and the TFT 17 area. When the light is transmitted to the area other than the pixel electrode 12, the quality of the black display state is lowered and the contrast is lowered. Further, when light enters the TFT 17, a leak current is generated in the channel of the TFT 17 due to photoexcitation, and the display quality is degraded. The black matrix prevents this.

Liquid crystal panel 2 configured as described above
The two are bonded together with an adhesive 20, and the polarizer 5 is bonded to the CF substrate 9 side and the polarizer 6 is bonded to the TFT substrate 10 side with the adhesive 20. The both polarizers 5 and 6 are provided in directions in which their polarization axes are orthogonal to each other. For this reason, at the connection between the liquid crystal panels 2, the leakage of light by the backlight system 7 is black in the crossed Nicols state of the polarizers 5 and 6, and the effect of making the connection between the liquid crystal panels 2 inconspicuous is obtained. is there.

Since the reinforcing substrates 3 and 4 cover the outside of the display surface, light from the outside may be reflected on the surface of the reinforcing substrates 3 and 4 to cause a decrease in contrast. To prevent this, An antireflection film may be formed on the outside of the reinforcing substrates 3 and 4, that is, on the surface side of the reinforcing substrates 3 and 4 which are not in contact with the polarizers 5 and 6.

As the adhesive 20, a refractive index adjusting agent having substantially the same refractive index as that of the CF substrate 9, the TFT substrate 10, and the reinforcing substrates 3 and 4 is used. As a result, it is possible to prevent refraction / scattering of light due to the unevenness of the substrate end faces at the connection portion between the liquid crystal panels 2, and to prevent the CF substrate 9 and the reinforcing substrate 3 from each other and the TFT substrate 10 and the reinforcing substrate 4 from each other. It is possible to prevent reflection of light that occurs at the interface and improve the contrast of display.

As such an adhesive 20, a UV-curable adhesive which is transparent and is used for bonding optical lenses and which is instantly cured by irradiation with ultraviolet rays is suitable. Moreover, this is the CF substrate 9,
The TFT substrate 10 and the reinforcing substrates 3 and 4 have an advantage that they can be easily obtained.

Next, a method of manufacturing the above-mentioned liquid crystal display device 1 will be described. FIG. 3 shows the manufacturing process step by step. (1) Prepare a pair of reinforcing substrates 3 and 4 and attach polarizers (polarizing plates) 5 and 6. In this case, the polarizers 5 and 6 are attached to the reinforcing substrates 3 and 4 by rollers, respectively, and subjected to autoclave treatment (see FIG. 3A). At this time, as the polarizers 5 and 6, it is preferable to use a polarizer for LCD to which an adhesive (adhesive) and a support film are attached in advance. Glass is used as the material of the reinforcing substrates 3 and 4, but the material is not limited to this, and other materials such as acrylic, polycarbonate (PC), polyethylene terephthalate (PE) are used.
T) Various polymeric materials such as films can be used.

(2) Reinforcing substrate 3 with polarizer 5 attached,
An adhesive 20 is filled and sandwiched between the reinforcing substrate 4 with the polarizer 6 and the two liquid crystal panels 2 juxtaposed in parallel to the reinforcing substrates 3 and 4 (FIG. 3B). reference). At this time, the polarizer 5 and the CF substrate 9 of the liquid crystal panel 2 are arranged so that the polarizer 6 and the TFT substrate 10 of the liquid crystal panel 2 face each other. As the adhesive 20, an ultraviolet curable adhesive is used. It is desirable that the UV-curable adhesive 20 is colorless and transparent and has the same refractive index as that of the CF substrate 9 and the TFT substrate 10. For example, CF substrate 9, T
When the refractive index of the FT substrate 10 is 1.54 (wavelength λ = 633 nm),
The adhesive 20 after curing has a refractive index of 1.53 to 1.55.

(3) The entire surface of the reinforcing substrate 6 is irradiated with ultraviolet rays (see FIG. 3C) to cure the adhesive 20. It should be noted that some types of polarizers are designed to hardly transmit ultraviolet rays, but in the present embodiment, it is desirable to use a polarizer that transmits 20% or more of ultraviolet rays having a wavelength of 365 nm. For example, in this example, the adhesive 20 could be sufficiently cured by using the polarizers 5 and 6 having the transmission spectrum shown in FIG. Also, instead of the ultraviolet curing adhesive 20,
A visible light curable adhesive may be used, and in this case, a polarizer having any transmission spectrum may be used.

(4) The backlight system 7 using the cold cathode tubes 21 is provided on the reinforcing substrate 4 side (see FIG. 3D).

As described above, in manufacturing the liquid crystal display device 1, the polarizers 5 and 6 are previously attached to the reinforcing substrates 3 and 4, and then the reinforcing substrates 3 and 6 are arranged so that the polarizers 5 and 6 face each other. The liquid crystal panels 2 on the left and right sides are filled with the adhesive 20 so as to be parallel to the reinforcing substrates 3 and 4 and sandwiched between them.
Therefore, unlike the above-described liquid crystal display device, unnecessary pressure is not applied to the liquid crystal panel when the polarizer is attached to the reinforcing substrate. Therefore, even if there is a very thin and weak sealing material 8 in the liquid crystal panel 2,
As a result, the sealing material 8 is not destroyed.

In the liquid crystal display device 1, the polarizer 5 is used.
Since 6 is provided on the reinforcing substrates 3 and 4 so as to face each other (the polarizers 5 and 6 are not exposed on the display surface), they are not scratched or soiled. Further, even if it becomes dirty, since the reinforcing substrates 3 and 4 (having a material such as glass) are exposed on the surface, it can be easily wiped off with alcohol or the like.

Further, even when foreign matter or bubbles are caught between the polarizers 5 and 6 and the reinforcing substrates 3 and 4 when the polarizers 5 and 6 are attached to the reinforcing substrates 3 and 4, the liquid crystal panel 2 is affected. It suffices to rework only the polarizers 5 and 6 and the reinforcing substrates 3 and 4 without giving the above, and the manufacturing process before that is not wasted.

In the liquid crystal display device 1, the polarizer 5 is used.
Since it is not necessary to separately provide a pair of substrates to attach 6 to each other, the liquid crystal display device 1 as a whole does not become heavy or thick.

[Embodiment 2] Another embodiment (Embodiment 2) of the present invention will be described below with reference to FIG.
In addition, the same member numbers are given to the respective members having the same functions as those in the first embodiment, and the description thereof will be omitted. As shown in FIG. 5, the liquid crystal display device 31 according to the present embodiment is different from that of the first embodiment shown in FIG. 1 in that a diffusion plate 22 is further provided between the reinforcing substrate 4 and the backlight system 7. The composition is different.

As the diffusion plate 22, a white acrylic plate, a scattering plate in which a plurality of polymer materials having different refractive indexes are mixed, or the like is used.

As a result, in addition to the effects of the first embodiment, it is possible to prevent uneven brightness of the cold cathode tubes 21 of the backlight system 7.

[Embodiment 3] The following description will explain still another embodiment (Embodiment 3) of the present invention with reference to FIG. In addition, the same member numbers are given to the respective members having the same functions as those in the first embodiment, and the description thereof will be omitted.

In the liquid crystal display device 41 according to the present embodiment, as shown in FIG. 6, the diffusing plate 44 having the diffusing property of the second embodiment is used.
Is different from the first and second embodiments in that it also serves as the reinforcing substrate 4. In this case, the polarizer 6 is attached to the diffusion plate 44.

As a result, the liquid crystal display device 41 can prevent the uneven brightness of the cold cathode tubes 21 used in the backlight system 7, and the reinforced substrate 4 is stronger than the liquid crystal display device 31 described in the second embodiment. It can be made lighter and thinner.

Although the direct type backlight system is used as the backlight system 7 in Embodiments 1 to 3, the light source such as a cold cathode tube is arranged on the side of the light guide plate in addition to this. Alternatively, a so-called edge light (side light) type backlight system may be used. In this case, the liquid crystal display device can be made lighter and thinner than in the first to third embodiments.

In the present invention, a liquid crystal display mode using a polarizer, such as TN (Twisted Nematic), STN (S
upper Twisted Nematic), FLC (Ferroelectric Liqui)
d Crystal) and the like are effective only in a liquid crystal display device.

[0055]

As described above, in the liquid crystal display device according to the first aspect of the present invention, the first substrate, the second substrate arranged in parallel with the first substrate, and the first substrate provided in advance on the first substrate. One polarizer,
A second polarizer provided in advance on the second substrate so as to face the first polarizer, and a plurality of liquid crystal panels which are filled between the first polarizer and the second polarizer and are parallel to both the substrates. And a bonding member for arranging both polarizers in parallel.

With this, since the polarizer is already provided on the substrate, it is possible to avoid applying extra pressure to the liquid crystal panel when the polarizer is provided on the substrate as in the conventional case. Therefore, even if there is a seal member formed in a very thin pattern in the liquid crystal panel for the purpose of making the connection part inconspicuous, it is avoided that the seal member is destroyed due to local force. it can.

Further, since it is not the polarizer but the substrate that is exposed to the display surface of the liquid crystal display device, it is possible to prevent the polarizer from being damaged or soiled, and even if soil is attached to the substrate. Also, since it can be easily wiped off with alcohol or the like, reliability can be improved.

Furthermore, since it is not necessary to separately provide a pair of substrates for attaching the polarizer, the liquid crystal display device can be thinned and the weight thereof can be reduced accordingly.

As described above, in the liquid crystal display device according to the second aspect of the invention, the diffusion member is further provided between the cold cathode tube and the second substrate.

As a result, in addition to the effect of the first aspect, it is possible to avoid the luminance unevenness of the cold cathode fluorescent lamp, and it is possible to obtain the effect that a high quality display is possible.

As described above, in the liquid crystal display device of the third aspect of the invention, the second substrate is further provided with the diffusive property for making the luminance of the cold cathode tubes uniform.

As a result, in addition to the effect of the second aspect, since the second substrate also serves as the diffusion member, it is possible to reduce the thickness and weight of the diffusion member.

As described above, in the method for manufacturing a liquid crystal display device according to the fourth aspect of the present invention, the step of providing the first polarizer on the first substrate, the step of providing the second polarizer on the second substrate, After the above steps, the first polarizer and the second polarizer are arranged so as to face each other, and an adhesive member is filled between the both polarizers, and a plurality of liquid crystal panels are arranged between the two polarizers in parallel with the both substrates. It is the structure provided with the process of installing in parallel.

As a result, it is possible to avoid applying unnecessary pressure to the liquid crystal panel when the polarizer is provided on the substrate as in the conventional case. Therefore, even if there is a seal member formed in a very thin pattern in the liquid crystal panel for the purpose of making the connection part inconspicuous, it is avoided that the seal member is locally applied with a force and destroyed. it can.

Conventionally, since the polarizer was provided on the substrate in the last step of all the manufacturing steps, if a defect occurs in the step, the process in the previous step is wasted because it is the last step. It had an influence on the whole manufacturing.
However, according to the structure of claim 4, when the plurality of liquid crystal panels are arranged in parallel between the both polarizers, the polarizer is already provided on the substrate. If the installation is defective, this step only needs to be performed again, the work is simpler than in the conventional case, and the influence on the subsequent manufacturing steps can be significantly suppressed.

Further, since it is not the polarizer but the substrate that is exposed on the display surface of the liquid crystal display device, it is possible to prevent the polarizer from being damaged or soiled, and even if the soil adheres to the substrate. Also, since it can be easily wiped off with alcohol or the like, reliability can be improved.

Furthermore, since it is not necessary to separately provide a pair of substrates for attaching the polarizer, the liquid crystal display device as a whole can be made thinner and lighter.

[Brief description of drawings]

FIG. 1 is a sectional view schematically showing a configuration of a liquid crystal display device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a configuration of a liquid crystal panel provided in the liquid crystal display device.

3A to 3D are cross-sectional views showing an example of a manufacturing process of the liquid crystal display device step by step.

FIG. 4 is a transmission spectrum of an ultraviolet curable adhesive used in the liquid crystal display device.

FIG. 5 is a sectional view schematically showing a configuration of a liquid crystal display device according to another embodiment of the present invention.

FIG. 6 is a sectional view schematically showing a configuration of a liquid crystal display device according to still another embodiment of the present invention.

FIG. 7 is a sectional view schematically showing a configuration of a conventional liquid crystal display device.

FIG. 8 is a cross-sectional view schematically showing the configuration of another conventional liquid crystal display device.

9 is a plan view showing a state in which two liquid crystal panels of the liquid crystal display device shown in FIGS. 7 and 8 are joined together.

[Explanation of symbols]

 1 Liquid Crystal Display Device 2 Liquid Crystal Panel 3 Reinforcement Substrate (First Substrate) 4 Reinforcement Substrate (Second Substrate) 5/6 Polarizer 7 Backlight System 8 Sealing Material 9 CF Substrate 10 TFT Substrate 20 Adhesive 22 Diffusing Plate (Diffusing Member) ) 44 Diffusion plate (second substrate)

Claims (4)

[Claims] 1. A first substrate, a second substrate arranged in parallel with the first substrate, a first polarizer provided in advance on the first substrate, and a second substrate facing the first polarizer. Adhesion for arranging a plurality of liquid crystal panels in parallel between both polarizers, which is filled between the first polarizer and the second polarizer and the second polarizer provided in advance on the substrate. A liquid crystal display device including a member. 2. A liquid crystal display device according to claim 1, further comprising a diffusing member provided between the cold cathode fluorescent lamp and the second substrate. 3. The second substrate is further provided with a diffusing property for making the brightness of the cold cathode fluorescent lamp uniform.
The described liquid crystal display device. 4. A step of providing a first polarizer on a first substrate, a step of providing a second polarizer on a second substrate, and after the above steps, the first polarizer and the second polarizer are opposed to each other. And arranging a plurality of liquid crystal panels in parallel between the two polarizers so that the adhesive member is filled between the two polarizers.