JP3117897B2 - Liquid crystal display device and method of manufacturing the same - Google Patents

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 for AV (audio visual) equipment and OA (office automation) equipment, and a method of manufacturing the same.

[0002]

2. Description of the Related Art In recent years, home televisions used as AV equipment and display devices used for OA equipment have been reduced in weight.
There is a demand for thinner, lower power consumption, higher definition, and larger screens. For this reason, CRT (cathode ray tub)
e), liquid crystal display (LCD), plasma display (P
DP), EL (electroluminescent) display, LED
(Light emitting diode) A display device such as a display device is also being developed and put into practical use to have a large screen.

[0003] Among them, the liquid crystal display device has the advantages that the thickness (depth) can be remarkably reduced, the power consumption is small, and the full color display is easy, compared with other display devices. It is being used in various fields, and there is great expectation for larger screens.

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

However, in the above-described multi-display type liquid crystal display device, in a display device in which liquid crystal panels are connected to each other, the connection portion of the liquid crystal panel has a problem such that light of a backlight leaks from a gap generated at a connection portion of each liquid crystal panel. Easy to stand out. On the other hand, the applicant has previously filed Japanese Patent Application
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 the liquid crystal display device, a normally white mode of a TN (Twisted Nematic) mode is adopted.

[0006] As shown in FIG.
In this example, two liquid crystal panels 52 are joined, arranged between a reinforcing substrate 53 and a reinforcing substrate 54, and attached. Further, polarizers 55 and 56 are disposed on the outer surfaces of the reinforcing substrates 53 and 54, respectively, and a backlight system 57 such as a cold cathode tube 71 is provided on the back (lower side in the figure) of the liquid crystal panel 52 as a display panel. Is provided. In the figure, a driver for controlling the image signal is omitted. The liquid crystal panel 52 modulates the light of the backlight system 57 in accordance with the image information, so that the observer can observe the image information input to the liquid crystal panel 52. 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 to eliminate uneven brightness of the cold-cathode tube 71 is provided.
In some cases. FIG. 9 shows these liquid crystal display devices 51.
A state in which liquid crystal panels 52 of 81 are connected is shown.

The liquid crystal panel 52 has a thin film transistor (TFT: Thin Film) formed in a matrix.
A TFT substrate 60 having a transistor (Trnsistor) and a CF substrate 59 having a color filter (CF: Color Filter) 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 is arranged at a fixed interval by a spacer 64, and a liquid crystal 61 is sealed between the two. Further, a non-light-transmitting pattern (not shown) made of a non-light-transmitting material on the CF substrate 59 and serving as a shadow mask for preventing light leakage and color bleeding from adjacent pixels is provided between adjacent pixels. Are formed along the boundary of.

In the liquid crystal display devices 51 and 81, for example, the following structure is adopted in order to make the connection between the liquid crystal panels 52 inconspicuous. That is, the TFT substrate 6 having an adhesive property such as an ultraviolet curable adhesive or the like.
The liquid crystal panels 52 are joined to each other using an adhesive (refractive index adjusting material) 70 having substantially the same refractive index as the CF substrate 59 and the reinforcing substrates 53 and 54. The reinforcing substrates 53 and 54 are bonded together by applying an adhesive 70.

In general, when connecting a plurality of liquid crystal panels, if the end face of the joint portion of the panel substrate is in contact with a medium having a different refractive index (for example, air), refraction of light occurs. In addition, if the end face becomes rough at the time of processing, irregularities are formed there, and refraction and scattering of light occur. As a result, the connection portion of the liquid crystal panel becomes conspicuous.

However, in the liquid crystal display devices 51 and 81, the use of the adhesive 70 allows the liquid crystal panel 5 to be used.
At the connection between the two, the refractive index is adjusted, so that refraction and scattering of light can be prevented, and a natural image can be obtained in which the connection is less noticeable.

[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 edge of the connection is formed in a very thin pattern (50 to 150 μm width). 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 an adhesive are attached using a roller or a squeegee. At this time, small air bubbles are entrained in the adhesive, and the air bubbles are compressed and eliminated 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 in all the manufacturing steps of the liquid crystal display devices 51 and 81, producing a defect leads to a significant decrease in efficiency in manufacturing.

Further, once the polarizers 55 and 56 are pasted, it is very difficult to peel them off. 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 Nos. 5 and 56 are formed of a polymer film, they are easily damaged, stains such as fingerprints often adhere, and hardly fall off. Therefore, the polarizers 55 and 56 are connected to the reinforcing substrate 5.
It is not preferable to stick it on the outside of 3.54.

In order to avoid such a problem, there is a method in which a 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 a plastic substrate, and any attaching 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 case, since a pair of substrates for attaching the polarizer is additionally required, the whole liquid crystal display device becomes heavy and thick. This is contrary to the advantages of liquid crystal display devices such as thin and light,
This is not the preferred solution.

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

[0020]

The liquid crystal display device according to claim 1 SUMMARY OF THE INVENTION The present invention, in order to solve the above problems, a first
The first substrate provided with the polarizer in advance and the second polarizer
The provided second substrate, a pair of substrates, and the pair of substrates
A plurality of liquid crystal panels consisting of liquid crystal sealed between
So that the first polarizer and the second polarizer face each other.
Between the first substrate and the second substrate,
Liquid crystal panels are juxtaposed, the first substrate and the second substrate
Fill the adhesive member so that it is parallel to and sandwich it
It is characterized by having.

[0021]

According to a second aspect of the present invention, in the liquid crystal display device according to the first aspect, the second substrate further has a diffusivity for making the luminance of the backlight uniform. It is characterized by.

According to a third aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device, comprising: providing a first polarizer on a first substrate;
Providing a second polarizer on the second substrate, a pair of substrates
And a liquid crystal sealed between the pair of substrates.
A step of forming a plurality of liquid crystal panels, and after the step, disposing a first polarizer and a second polarizer so as to face each other, filling an adhesive member between the two polarizers, And a step of arranging a plurality of liquid crystal panels in parallel between the polarizers.

[0024]

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

Since the first and second substrates are arranged so that the first and second polarizers are opposed to each other, what is exposed on the display surface of the liquid crystal display device is not the first and second polarizers. And the first and second substrates.

[0026]

According to the second aspect, in addition to the operation of claim 1, since the light from the backlight by the second substrate are diffused, not affected by the luminance unevenness of a backlight. Thus, according to the second aspect, since the second substrate also functions as a diffusion member, an amount corresponding thinned corresponding to the diffusion member, it is possible to weight reduction.

According to the third aspect of the present invention, the first and second polarizers are provided on the first and second substrates before the plurality of liquid crystal panels are arranged in parallel between the polarizers. By this step, no pressure is applied to the liquid crystal panel. That is, when a plurality of liquid crystal panels are arranged in parallel between the polarizers, the polarizers are already provided on the substrate. Does not add to the liquid crystal panel.

[0029]

【Example】

Embodiment 1 FIGS. 1 to 4 show an embodiment of the present invention.
This will be described below. As shown in FIG. 1, the liquid crystal display device according to the present embodiment is a direct-view type liquid crystal display device 1. The liquid crystal display device 1 has two active matrix type liquid crystal panels 2 arranged side by side and joined together, and this is disposed between a reinforcing substrate 3 and a reinforcing substrate 4. A polarizer 5 and a polarizer 6 are arranged between the reinforcing substrates 3 and 4 and the liquid crystal panel 2, respectively.

Further, the back of the liquid crystal panel 2 (the lower side in the figure)
And a backlight system 7 using a cold cathode tube 21 or the like as a light source. It should be noted that a driver for controlling the image signal is omitted in the figure. Further, in this embodiment, a case where two liquid crystal panels 2 are connected is described. However, the present invention is not limited to this, and a larger screen may be achieved by connecting a plurality of liquid crystal panels 2.

The liquid crystal panel 2 has an active matrix type liquid crystal panel structure using active elements in a matrix form.
0 and the CF substrate 9 are bonded in parallel, and this TF
It is formed by sealing a liquid crystal 11 between the T substrate 10 and the CF substrate 9. At this time, a pixel electrode 1 described later is used.
2 and the common electrode 13 are arranged 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 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, which is 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 supply of an image signal to the pixel electrode 12. A thin film diode (TFD: Thin Film Diode) may be used instead of the TFT.

The common electrode 13 is provided on the CF substrate 9.
Are formed, and when performing color display, R (red), G (green), and B (blue) corresponding to each pixel electrode 12 are further provided.
Are formed, and a non-translucent pattern 19 for separating each pixel is 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 composed of each pixel electrode 1
It is provided to block light from entering the space between the two or the area of the TFT 17. When light passes through an area other than the pixel electrode 12, the quality of the black display state is reduced and the contrast is reduced. Further, when light enters the TFT 17, a leakage current is generated in the TFT 17 channel by light excitation, and the display quality is reduced. The black matrix prevents this.

The liquid crystal panel 2 configured as described above
The components are connected to each other by an adhesive 20, and the polarizer 5 is attached to the CF substrate 9 and the polarizer 6 is attached to the TFT substrate 10 by the adhesive 20. These polarizers 5 and 6 are provided in directions in which their polarization axes are orthogonal to each other. For this reason, at the connection portion between the liquid crystal panels 2, light leakage due to the backlight system 7 exhibits black in the crossed Nicols state of the polarizers 5 and 6, and has an effect of making the connection portion between the liquid crystal panels 2 inconspicuous. is there.

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

As the adhesive 20, a refractive index adjusting agent having substantially the same refractive index as the CF substrate 9, the TFT substrate 10, and the reinforcing substrates 3 and 4 is used. Thereby, it is possible to prevent refraction and scattering of light due to unevenness of the end face of the substrate at the connection portion between the liquid crystal panels 2, and to prevent the CF substrate 9 and the reinforcing substrate 3 and the TFT substrate 10 and the reinforcing substrate 4 The reflection of light occurring at the interface can be prevented, and the display contrast can be improved.

As such an adhesive 20, an ultraviolet-curable adhesive which is used for bonding optical lenses and the like, and which accelerates curing instantly only by irradiating ultraviolet rays is suitable. Moreover, this is the CF substrate 9,
There is an advantage that a substrate having substantially the same refractive index as the TFT substrate 10 and the reinforcing substrates 3 and 4 can be easily obtained.

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

(2) a reinforcing substrate 3 with a polarizer 5;
An adhesive 20 is filled and sandwiched between the two liquid crystal panels 2 arranged side by side with the reinforcing substrate 4 having the polarizer 6 so as to be parallel to the reinforcing substrates 3.4 (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 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 cured adhesive 20 having a refractive index of 1.53 to 1.55 is used.

(3) The entire surface of the reinforcing substrate 6 is irradiated with ultraviolet rays (see FIG. 3C), and the adhesive 20 is cured. Some types of polarizers are designed so that they hardly transmit ultraviolet light. In this embodiment, it is desirable to use a polarizer that transmits 20% or more of ultraviolet light having a wavelength of 365 nm. For example, in the present embodiment, the adhesive 20 was sufficiently cured by using the polarizers 5 and 6 having the transmission spectra shown in FIG. Also, instead of the UV-curable 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 the production of the liquid crystal display device 1, the polarizers 5 and 6 are attached to the reinforcing substrates 3 and 4 in advance, and then the reinforcing substrates 3 and 6 are arranged so that the polarizers 5 and 6 face each other. The adhesive 20 is filled between the right and left liquid crystal panels 2 so that the left and right liquid crystal panels 2 are parallel to the reinforcing substrates 3.4.
Therefore, unlike the liquid crystal display device described above, when the polarizer is attached to the reinforcing substrate, unnecessary pressure is not applied to the liquid crystal panel. Therefore, even if the very thin and weak sealing material 8 exists in the liquid crystal panel 2,
Thereby, the sealing material 8 is not broken.

In the liquid crystal display device 1, the polarizer 5
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), so that they are not scratched or stained. Further, even if the surface is soiled, the reinforcing substrates 3 and 4 (having a material such as glass) are exposed on the surface, so that the surface can be easily wiped off with alcohol or the like.

Further, even when foreign matter or air bubbles are caught between the polarizers 5.6 and the reinforcing substrates 3.4 when the polarizers 5.6 are attached to the reinforcing substrates 3.4, the liquid crystal panel 2 is not affected. It is sufficient to rework only the polarizers 5 and 6 and the reinforcing substrates 3 and 4 without giving any effect, and the previous manufacturing process is not wasted.

In the liquid crystal display device 1, the polarizer 5
Since there is no need to separately provide a pair of substrates for attaching 6, the entire liquid crystal display device 1 does not become heavy or increase in thickness.

Liquid crystal display device 31 as a reference example of the present invention
5 differs from the configuration 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 as shown in FIG.

As the diffusion plate 22, a white acrylic plate, a scattering plate obtained by mixing a plurality of polymer materials having different refractive indexes, or the like is used.

Thus, 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.

[0050] To describe still another embodiment of Example 2 the present invention (Example 2) on the basis of FIG. 6, is as follows. The first embodiment
The members having the same functions as those described above are denoted by the same reference numerals, and description thereof is omitted.

[0051] In the liquid crystal display device 41 according to the present embodiment, as shown in FIG. 6, the diffusion plate 4 having a diffusivity of Reference Example
The fourth embodiment is different from the first embodiment in that the fourth substrate also has the reinforcing substrate 4. In this case, the polarizer 6 is attached to the diffusion plate 44.

Thus, the liquid crystal display device 41 can prevent luminance unevenness of the cold cathode tubes 21 used in the backlight system 7 and can provide a more reinforced substrate 4 than the liquid crystal display device 31 described in the reference example. It can be made lighter and thinner.

In the first and second embodiments, the direct type backlight system is used as the backlight system 7. However, the present invention is not limited to this. In addition, a light source such as a cold cathode tube is arranged on the side of the light guide plate. Also, 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 and second embodiments.

In the present invention, a liquid crystal display mode using a polarizer, for example, TN (Twisted Nematic), STN (S
uper Twisted Nematic), FLC (Ferroelectric Liqui
d Crystal) and the like.

[0055]

As described above, in the liquid crystal display device according to the first aspect of the present invention, the first substrate on which the first polarizer is provided in advance is provided .
A second substrate provided with a second polarizer in advance, and a pair of substrates
And a liquid crystal sealed between the pair of substrates.
A plurality of liquid crystal panels, wherein the first polarizer and the second polarizer
The first substrate and the second substrate, which are arranged so that a child is opposed to the first substrate
The plurality of liquid crystal panels are arranged side by side, and
An adhesive member is filled so as to be parallel to the first substrate and the second substrate.
It is a configuration that is inserted and sandwiched .

As a result, 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 related art. For this reason, 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 portion inconspicuous, it is also possible to prevent the seal member from being broken due to local force. it can.

Since the substrate exposed on the display surface of the liquid crystal display device is not the polarizer but the substrate, it is possible to prevent the polarizer from being damaged or stained. Can be easily wiped off with alcohol or the like, and the reliability can be improved.

Further, since it is not necessary to separately provide a pair of substrates for attaching the polarizer, it is possible to reduce the thickness and weight of the entire liquid crystal display device.

[0059]

[0060]

As described above, in the liquid crystal display device according to the second aspect of the present invention, the second substrate is further provided with a diffusivity for making the luminance of the backlight uniform.

Accordingly, in addition to the effect of the first aspect , since the second substrate also serves as the diffusion member, the second substrate also has an effect that the thickness and the weight can be reduced by an amount corresponding to the diffusion member.

As described above, in the method for manufacturing a liquid crystal display device according to the third aspect of the present invention, a step of providing a first polarizer on a first substrate, a step of providing a second polarizer on a second substrate, pair
Substrate and the liquid crystal sealed between the pair of substrates.
Forming a plurality of liquid crystal panels, and after the step, disposing the first polarizer and the second polarizer so as to face each other;
A step of filling an adhesive member between both polarizers and arranging a plurality of liquid crystal panels in parallel with both substrates between the polarizers.

Thus, it is possible to avoid applying extra pressure to the liquid crystal panel when the polarizer is provided on the substrate as in the related art. For this reason, even if there is a sealing member formed in a very thin pattern in the liquid crystal panel for the purpose of making the connection part inconspicuous, it is also possible to prevent the sealing member from being locally applied and broken due to a force. it can.

Conventionally, since a polarizer is provided on a substrate in the last step in all the manufacturing steps, if a defect occurs in this step, the processing in the previous step is wasteful because the last step is performed. Had an effect on the entire production.
However, according to the configuration of claim 3 , when a plurality of liquid crystal panels are arranged in parallel between the polarizers, the polarizers are already provided on the substrate, so that the polarizers are placed on the substrate. In the case of the installation failure, only this step needs to be performed again, the operation is simpler than in the past, and the influence on the subsequent manufacturing steps can be significantly reduced.

Further, since the surface exposed on the display surface of the liquid crystal display device is not the polarizer but the substrate, the polarizer can be prevented from being damaged or stained. Can be easily wiped off with alcohol or the like, and the reliability can be improved.

Further, since it is not necessary to separately provide a pair of substrates for attaching the polarizer, it is possible to reduce the thickness and weight of the entire liquid crystal display device.

[Brief description of the drawings]

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

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

FIGS. 3A to 3D are cross-sectional views illustrating an example of a manufacturing process of the liquid crystal display device in a stepwise manner.

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 a reference example of the present invention.

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

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

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

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

[Explanation of symbols]

 Reference Signs List 1 liquid crystal display device 2 liquid crystal panel 3 reinforcing substrate (first substrate) 4 reinforcing substrate (second substrate) 5.6 polarizer 7 backlight system 8 sealing material 9 CF substrate 10 TFT substrate 20 adhesive 22 diffusion plate (diffusion member) ) 44 Diffusion plate (second substrate)

Claims (3)

(57) [Claims] 1. A first substrate provided with a first polarizer in advance, a second substrate provided with a second polarizer in advance , a pair of substrates, and a pair of substrates sealed between the pair of substrates. liquid
A plurality of liquid crystal panels made of a crystal, wherein the first polarizer and the second polarizer are arranged so as to face each other.
Between the first substrate and the second substrate.
Are arranged side by side, and are parallel to the first substrate and the second substrate.
The liquid crystal display device which the adhesive member is sandwiched by filling so. 2. The liquid crystal display device according to claim 1, wherein said second substrate further has a diffusivity for making the luminance of the backlight uniform. 3. A step of providing a first polarizer on a first substrate, a step of providing a second polarizer on a second substrate , and sealing between a pair of substrates and the pair of substrates. liquid
Forming a plurality of liquid crystal panels made of a crystal, and after the step, disposing a first polarizer and a second polarizer so as to face each other, filling an adhesive member between both polarizers, Providing a plurality of liquid crystal panels in parallel between both polarizers in parallel to the liquid crystal display device.