JP3202192B2 - Liquid crystal display device and manufacturing method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a liquid crystal display device and a method of manufacturing the same, and more particularly to a bright liquid crystal display device capable of full color display and a method of manufacturing the same.

[0002]

2. Description of the Related Art Since a liquid crystal display device is thin and lightweight,
It is widely used as a display for portable information terminals. Since the liquid crystal panel itself is a light-receiving element (or a non-light-emitting element) which does not emit light by itself, a liquid crystal display device generally has a reflective plate disposed on the back of the liquid crystal panel and displays the image using reflection of external light. The display device can be classified into a display device and a transmissive liquid crystal display device in which a backlight is arranged on the back surface of a liquid crystal panel and the light of the backlight is projected and displayed.

As is well known, a liquid crystal can be driven at a low voltage of several volts, and in the case of the above-mentioned reflection type liquid crystal display device, display is performed by using external light without using a backlight. Power consumption.

When an image is displayed in color on a normal reflective liquid crystal panel, micro color filters of three colors of red, green and blue are provided on three adjacent pixels, and additive color mixing is performed. However, the above color filter requires a polarizing plate in addition to low light transmittance. As a result, when a reflective liquid crystal display device using external light is manufactured, there is a problem that a bright color cannot be displayed.

Therefore, in order to display a bright color without using a polarizing plate or a color filter, a reflection type in which three guest host liquid crystal layers of three colors of cyan, magenta and yellow are laminated based on the so-called subtractive color mixing principle. A color liquid crystal display device has been disclosed by the present inventors (for example, Japanese Patent Application No. Hei 6-286324).

Hereinafter, the reflection type color liquid crystal display device will be described.

The above-mentioned reflection type color liquid crystal display device is shown in FIG.
As shown in the figure, between the lower substrate 301 and the upper substrate 302,
Three liquid crystal layers 303 to 305 filled with cyan, magenta, or yellow guest host liquid crystals are provided.

On the lower substrate 301, thin film transistors (hereinafter, referred to as TFT elements) 306 to 308 and a first pixel electrode 309 also serving as a reflection film are formed.
Further, on the lower substrate 301, the first photosensitive polyimide 31 is formed.
A first insulating film 311 supported by the first insulating film 3 is provided. A second pixel electrode 312 is formed on the first insulating film 311.
And a second photosensitive polyimide 314. The second pixel electrode 312 is connected to the TFT element 307 via the opening 313.

Further, a third insulating film 315 supported by the second photosensitive polyimide 314 is provided. On the third insulating film 315, a third pixel electrode 316 and a third photosensitive polyimide 317 are provided. The third pixel electrode 316 is connected to the TFT element 30 through the opening 318.
8 is connected. The above third photosensitive polyimide 317
A common electrode 319 is provided thereon. here,
The first liquid crystal layer 303 is formed between the first pixel electrode 309 on the substrate and the second
A voltage is applied by the pixel electrode 312, a voltage is applied to the second liquid crystal layer 304 by the second pixel electrode 312 and the third pixel electrode 316, and a voltage is applied to the third liquid crystal layer 305 by the third pixel electrode 316 and the common electrode 319. A voltage is applied.

[0010]

However, the above-mentioned conventional reflection type color liquid crystal display device has room for improvement with respect to the following points. That is, in general, the yield tends to decrease as the process proceeds, such as sequentially stacking liquid crystal layers on a TFT array substrate.
Therefore, if a defect or the like is confirmed in the liquid crystal layer, even the expensive TFT array substrate is discarded, resulting in an increase in cost.

The pattern of the pixel electrode formed on the substrate is TN (Twisted Nematic) or STN (Sutured Nematic).
Even in the case of a simple matrix liquid crystal such as per Twisted Nematic, the etching process needs to be performed so that the formation pattern of the pixel electrode is different because it changes depending on the model. Therefore, the formation process of the pixel electrode becomes complicated, and the manufacturing cost of the liquid crystal panel is increased, thereby preventing reduction of the product cost. In particular, in the case of a plastic liquid crystal panel, the plastic substrate itself is expensive, and the heat resistance is inferior to that of a glass substrate or the like, and it is difficult to form and process the transparent electrode. are doing.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a liquid crystal display device in which the yield is improved and the manufacturing cost is reduced, and a method of manufacturing the same. is there.

[0013]

According to a first aspect of the present invention, there is provided an image forming apparatus comprising: a substrate having a common electrode provided on an inner surface thereof; and a support member provided on the common electrode. A liquid crystal layer is formed by filling a liquid crystal between the sealing plate and a sealing layer, and a display layer is formed by providing a pixel electrode on a surface of the sealing plate opposite to a surface facing the liquid crystal layer. When,
A non-linear element for driving the liquid crystal layer, a driving electrode electrically connected to the non-linear element, and a driving electrode for outputting a driving voltage for driving the liquid crystal layer to the pixel electrode, and facing the substrate; And a connection unit having a function of electrically connecting and having a function of fixed connection, and the pixel electrode and the drive electrode are electrically connected by the connection unit. The display layer and the array substrate are fixedly connected.

According to the above, the configuration is essentially different from the configuration in which a liquid crystal layer is formed on an array substrate having a non-linear element as in a conventional liquid crystal display device.
This is a configuration in which an array substrate having a non-linear element is fixedly connected by connection means. Therefore, since the display layer and the array substrate are independently configured, even if a display defect is found in, for example, a liquid crystal layer, it is not necessary to discard even the array substrate on which the nonlinear element is formed. As a result, a liquid crystal display device having an improved yield can be provided at low cost.

Further, according to the above configuration, the pixel electrode in the display layer and the drive electrode connected to the nonlinear element are electrically connected by the connection means. Therefore, since the planar relative position between the pixel electrode and the drive electrode only needs to be within a range that can be connected by the connection means, it is possible to ease the requirement for accuracy of positioning. The fixed connection between the array substrate and the display layer by the connection means means, for example, adhesion, heat welding, pressure bonding, and the like.

According to a second aspect of the present invention, in the liquid crystal display device according to the first aspect, the connecting means is an anisotropic conductive adhesive.

As described above, by using an anisotropic conductive adhesive for the connection means, the pixel electrodes in the display layer and the drive electrodes in the array substrate are electrically bonded, and the conductive material is conductive only in the film thickness direction. Therefore, short-circuiting between the anisotropic conductive adhesives can be prevented.

According to a third aspect of the present invention, a liquid crystal is filled between a substrate and a sealing plate to form a liquid crystal layer. A display layer having a structure in which a sealing plate is supported by a supporting member existing between the display layer and a non-linear element for applying an electric field to the liquid crystal layer to perform dimming driving of the liquid crystal layer is provided and faces the substrate. A liquid crystal display device comprising an array substrate arranged as described above, wherein the display layer is supported by a common electrode provided on an inner side surface of the substrate and a first support member formed on the common electrode. A first liquid crystal layer is formed by filling a liquid crystal between a first sealing plate provided with a first pixel electrode on a surface opposite to a surface facing the common electrode; A stop plate, supported by a second support member formed on the first sealing plate, and A liquid crystal is filled between a surface facing the pixel electrode and a second sealing plate provided with a second pixel electrode on a surface opposite to the second liquid crystal layer to form a second liquid crystal layer. The array substrate includes one or more layers, the array substrate includes a first drive electrode that outputs a drive voltage for driving the first liquid crystal layer to the first pixel electrode, and an electrical connection to the first drive electrode. A first nonlinear element connected thereto, at least one or more second drive electrodes for outputting a drive voltage for driving the second liquid crystal layer to the second pixel electrode, and an electrical connection to the second drive electrode Provided with at least one or more second nonlinear elements, further provided with first and second connection means having a function of electrically connecting and having a function of fixed connection, The first connection terminal and the first drive electrode are electrically connected via the first connection means. They are connected to each other,
The second connection terminal and the second drive electrode are electrically connected via the second connection means, and the display layer and the array substrate are fixedly connected by the first and second connection means. It is characterized by the following.

With the above configuration, color display can be performed on the display screen of the liquid crystal display device. The term "fixed connection between the array substrate and the display layer by the first and second connection means" means, for example, adhesion, welding by heat, pressure bonding, and the like.

According to a fourth aspect of the present invention, a liquid crystal is filled between a substrate and a sealing plate to form a liquid crystal layer. A display layer having a structure in which a sealing plate is supported by a supporting member existing between the display layer and a non-linear element for applying an electric field to the liquid crystal layer to perform dimming driving of the liquid crystal layer is provided and faces the substrate. A liquid crystal display device comprising an array substrate arranged as described above, wherein the display layer is supported by a common electrode provided on an inner surface of the substrate and a first support member formed on the substrate. Liquid crystal is filled between a first sealing plate provided with a first pixel electrode on a surface opposite to a surface facing the common electrode and a first liquid crystal layer is formed. Board and
The second support member formed on the first sealing plate supports the second pixel on a surface opposite to a surface facing the first pixel electrode.
Liquid crystal is filled between the second sealing plate provided with the pixel electrodes to form a second liquid crystal layer, and the second sealing plate and the third liquid crystal layer formed on the second sealing plate are formed. Supported by a support member,
A third liquid crystal layer is formed by filling a liquid crystal between a third sealing plate provided with a third pixel electrode on a surface opposite to a surface facing the second pixel electrode, and a third liquid crystal layer is formed. An electrode is electrically connected to a first connection terminal, the second pixel electrode is electrically connected to a second connection terminal, and the third pixel electrode is electrically connected to a third connection terminal. The array substrate includes a first drive electrode that outputs a drive voltage for driving the first liquid crystal layer to the first pixel electrode, and a first nonlinear element that is electrically connected to the first drive electrode. A second driving electrode for outputting a driving voltage for driving a second liquid crystal layer to the second pixel electrode; and a second nonlinear element electrically connected to the second driving electrode. A third driving circuit for outputting a driving voltage for driving the third liquid crystal layer to the third pixel electrode.
A first electrode having a configuration in which a drive electrode and a third nonlinear element electrically connected to the third drive electrode are provided, and further having a function of electrically connecting and a function of fixedly connecting; To a third connection means, wherein the first connection terminal and the first drive electrode are electrically connected via the first connection means, and the second connection terminal and the second drive electrode are connected to the third drive means. The third connection terminal and the third drive electrode are electrically connected via the second connection means, and are electrically connected via the third connection means, and are electrically connected to each other by the first to third connection means. The display layer and the array substrate are fixedly connected.

According to a fifth aspect of the present invention, in the liquid crystal display device according to the fourth aspect, the first to third liquid crystal layers include:
A guest-host liquid crystal including a liquid crystal and a dichroic dye having a different color among cyan, magenta, and yellow is included.

With the above configuration, color display on the display screen of the liquid crystal display device can be easily achieved. The term "fixed connection between the array substrate and the display layer by the first to third connection means" means, for example, adhesion, heat welding, pressure bonding, and the like.

According to a sixth aspect of the present invention, there is provided a liquid crystal display device comprising: a substrate having a common electrode provided on an inner surface thereof; and a sealing plate supported by a support member provided on the common electrode. A display layer configured by forming a liquid crystal layer by being filled with liquid crystal, a driving circuit for driving the liquid crystal layer, and a predetermined distance electrically connected to the driving circuit. With a plurality of pixel electrodes arranged in
An array substrate is provided so as to face the substrate, and the display layer and the array substrate are connected by connection means.

According to the above configuration, since the pixel electrodes are formed on the array substrate and the common electrode and the liquid crystal layer are formed on the display layer side, even if the display pattern differs depending on the application, It can be easily achieved only by changing the formation pattern of the pixel electrodes. That is, the display layer can correspond to various array substrates having various display patterns depending on the application, and is excellent in versatility.
Further, as described above, the cost can be reduced because the display layer can support other display patterns.

Further, according to the above configuration, when the display layer and the driving substrate are bonded to each other, their planar relative positions may be arbitrarily set, so that alignment is not required and mounting is easy. .

According to a seventh aspect of the present invention, in the liquid crystal display device according to the sixth aspect, the sealing plate has a thickness of 0.5.
It is characterized by being made of a polymer resin in the range of not less than μm and not more than 10 μm.

As described above, the thickness of the sealing plate is set to 0.
When the thickness is 5 μm or more, unevenness of the liquid crystal layer can be prevented, and the gap of the liquid crystal layer can be made uniform. On the other hand, by setting the thickness of the sealing plate to 10 μm or less, it is not necessary to provide a pixel electrode on the side opposite to the sealing surface of the sealing plate, and the liquid crystal layer can be driven at a low voltage.

According to an eighth aspect of the present invention, in the liquid crystal display device according to the sixth or seventh aspect, the substrate and the other array substrate are made of a polymer resin.

With the above configuration, it is possible to provide a liquid crystal display device which is thin, lightweight, and resistant to bending and bending.

In order to solve the above-mentioned problem, the invention according to claim 9 is directed to a substrate provided with a common electrode on an inner surface thereof and a sealing plate supported by a support member provided on the common electrode. A liquid crystal layer is formed by filling a liquid crystal between them, and a plurality of pixel electrodes are provided at regular intervals on a surface of the sealing plate opposite to a surface supported by the support member, and A plurality of array substrates each including a plurality of non-linear elements for driving the liquid crystal layer, and the display layer and the plurality of non-linear elements are electrically connected to the plurality of pixel electrodes. The array substrate is connected by connection means.

In the conventional multi-screen LCD, since the pitch between the pixel electrodes is not uniform at the joint between the panels, the joint is visually recognized on the display screen. However, since a plurality of pixel electrodes are provided at regular intervals on the surface of the sealing plate facing the array substrate as in the above configuration, the seam between the array substrates does not appear on the display screen. Therefore, it is possible to provide a multi-screen liquid crystal display device in which seams between panels are not conspicuous.

According to a tenth aspect of the present invention, in the liquid crystal display device according to the ninth aspect, the plurality of array substrates are arranged on the same plane, and the display layer and the plurality of array substrates are different from each other. The plurality of pixel electrodes and the plurality of non-linear elements are opposed to each other within a range in which the plurality of pixel electrodes and the plurality of nonlinear elements are electrically connected to each other.

According to the above configuration, it is necessary to arrange a plurality of array substrates precisely and to bond the display layer and the plurality of array substrates in order to make the seams between the panels inconspicuous. Absent. That is, the planar relative position between the display layer and the array substrate may be within a range in which the pixel electrode and the non-linear element can be electrically connected, so that the alignment accuracy requirement can be relaxed.

Further, for the same reason as above, it is not necessary to make the pixel pitch coarse in order to make the seams between the panels inconspicuous, thereby providing a multi-screen liquid crystal display device capable of displaying a high-definition image.

According to an eleventh aspect of the present invention, in the ninth or tenth aspect, an optical color filter layer is provided between the substrate and the common electrode. .

According to the above arrangement, color display on the display screen of the liquid crystal display device can be easily achieved.

According to a twelfth aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device according to the first aspect, wherein the inner surface of the substrate has a common A first step of forming an electrode; a second step of forming the support member on the common electrode; and a third step of forming the sealing plate so as to be supported by the support member.
A fourth step of enclosing the liquid crystal between the substrate and the sealing plate to form a liquid crystal layer, and forming a pixel on the surface of the sealing plate opposite to the surface facing the liquid crystal layer. A fifth step of forming electrodes, a sixth step of forming a non-linear element and a drive electrode for driving the liquid crystal layer on the other array substrate, and electrically connecting the pixel electrode and the drive electrode by connecting means. And a seventh step of performing a dynamic connection. According to the above method, even if a display defect is found in the liquid crystal layer or the like, it is not necessary to discard the array substrate on which the non-linear element or the like is formed. Therefore, the manufacturing cost can be reduced and the yield can be improved.

In the seventh step, the above-mentioned substrate and another array substrate may be bonded so that the pixel electrode and the driving electrode are electrically connected via the connection means. Therefore,
The planar relative position between the pixel electrode and the drive electrode only needs to be within a range that can be connected by the connecting means, and thereby the requirement for the accuracy of alignment can be eased.

According to a thirteenth aspect of the present invention, in the method for manufacturing a liquid crystal display device according to the twelfth aspect, a step of forming another supporting member on the pixel electrode, Forming another sealing plate to be supported; enclosing another liquid crystal between the sealing plate and the other sealing plate to form another liquid crystal layer; A step of forming another pixel electrode on the surface of the sealing plate opposite to the surface facing the other liquid crystal layer at least once, thereby forming a plurality of liquid crystal layers. .

According to the above-described method, a method for manufacturing a liquid crystal display device capable of easily laminating a plurality of liquid crystal layers using a very thin sealing plate and displaying a color on a display screen is provided. be able to.

According to a fourteenth aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device according to the first aspect, wherein the inner surface of the substrate has a common structure. A first step of forming an electrode; a second step of forming the support member on the common electrode; and a third step of forming the sealing plate so as to be supported by the support member.
A fourth step of enclosing the liquid crystal between the substrate and the sealing plate to form a liquid crystal layer, and forming a pixel on the surface of the sealing plate opposite to the surface facing the liquid crystal layer. A fifth step of forming electrodes, a sixth step of inspecting a display state by applying a voltage to the common electrode and the pixel electrode, and a non-linear element for driving the liquid crystal layer on the array substrate. A seventh step of forming a drive electrode;
An eighth step of electrically connecting the pixel electrode and the drive electrode by a connection unit only on a display layer having a good display state based on the inspection result of the sixth step.

According to the above method, the display state of the display layer is inspected before the display layer and the array substrate are connected by the connecting means. Therefore, even if a defect is confirmed, a non-linear element or the like is provided as in the prior art. There is no need to dispose of the used array substrate. Therefore, the cost can be reduced when manufacturing the liquid crystal display device, and the liquid crystal display device can be manufactured with an improved yield.

According to a fifteenth aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device according to the sixth aspect, wherein a common electrode is provided on a surface of the substrate. A first step of forming the support member on the common electrode; a third step of forming the sealing plate so as to be supported by the support member; A fourth step of forming a liquid crystal layer enclosing the liquid crystal between the stop plate and a fifth step of forming a pixel electrode on the array substrate so as to face the common electrode; A sixth step of forming a drive circuit for driving the liquid crystal layer, and a seventh step of bonding the substrate and the array substrate with an adhesive.

According to the above method, the pixel electrodes are formed on the array substrate, and the common electrode and the liquid crystal layer are formed on the display layer side. There is no need to manufacture according to the shape. Therefore, the display layer can be used in correspondence with an array substrate having various display patterns depending on the application, and the manufacturing cost can be reduced. In addition, when the display layer and the other substrate are bonded to each other, their planar relative positions may be arbitrarily set, so that alignment is not required and mounting is easy.

According to a sixteenth aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device according to the ninth aspect, wherein a common electrode is provided on the substrate. A first step of forming, and on the common electrode,
A second step of forming the support member, a third step of forming the sealing plate to be supported by the support member, and a surface of the sealing plate opposite to a surface supported by the support member A fourth step of forming a plurality of pixel electrodes at a fixed interval from each other; and a fifth step of sealing the liquid crystal between the substrate and the sealing plate to form a liquid crystal layer.
A sixth step of forming a plurality of non-linear elements for driving the liquid crystal layer on the array substrate; a seventh step of dividing the array substrate into at least two or more; An eighth step of electrically connecting the electrodes and the plurality of nonlinear elements so as to correspond to each other by a connecting means.

According to the above method, unlike the case where a pixel electrode is formed on the display layer side as in a conventional liquid crystal display device,
A plurality of pixel electrodes are formed at regular intervals on the display layer opposite to the sealing surface of the sealing plate. Therefore, in order to make the joint between the panels inconspicuous, it is not necessary to dispose them precisely so that the difference between the actual dimensions of the cut and the set dimensions at the time of the cut is small. That is, it is sufficient that the planar relative position between the display layer and the array substrate is within a range in which the pixel electrode and the non-linear element can be electrically connected, thereby alleviating the requirement for alignment accuracy. Furthermore, in order to make the above seams inconspicuous,
There is no need to make the pixel pitch coarse, which allows a high-definition image to be displayed.

Therefore, it is possible to provide a method for manufacturing a multi-screen liquid crystal display device in which the seams between the panels are inconspicuous.

[0048]

(Embodiment 1) Embodiment 1 of the present invention will be described below with reference to FIGS. However, parts unnecessary for description are omitted, and some parts are shown enlarged or reduced for ease of description. The above applies to the following drawings.

FIG. 1 is a sectional view schematically showing the liquid crystal display device according to the first embodiment.

As shown in FIG. 1, the above liquid crystal display device
An array substrate 1, a display unit 3, and an anisotropic conductive adhesive (connecting means,
First to third connection means) 2a to 2c are provided.

The array substrate 1 is, as shown in FIG.
A TFT (Thin as a non-linear element) is formed on a glass substrate 11.
Film Transistor: a thin film transistor, first to third non-linear elements) 12 to 14, and drive electrodes (first to third drive electrodes) 15 to 17 are provided.

As shown in FIG. 2, the TFTs 12 to 14 are electrically connected to the driving electrodes 15 to 17 connected to the drain terminals of the TFTs 12 to 14, respectively. The pitch Q of the TFTs 12 to 14 in the X direction is 10 pixels with respect to the pixel pitch P = 300 μm.
It is about 0 μm. The pitch R in the Y direction is 3
It is about 00 μm. The drive electrodes 15 to 17 have a width S of the widest part of 80 μm, a length T of 250 μm,
It consists of a TO (Indium Tin Oxide) electrode. Further, the drive electrodes 15 to 17 are arranged in stripes in one pixel, similar to the stripe arrangement of RGB pixels in a color filter.

As shown in FIG. 3, the display section 3 has, between a substrate 21 and a polymer resin layer 22, three liquid crystal layers filled with guest-host liquid crystals of different colors. Three display layers 23 to 25 are provided.

The substrate 21 is made of, for example, glass.
A common electrode 29 is provided on the substrate 21. or,
The substrate 21 is not limited to glass, but may be a polymer resin such as plastic. The common electrode 29 is formed of an ITO electrode, and is connected to the ground of the array substrate 1 by applying a conductive paste (not shown) made of a resin containing carbon powder to the periphery of the display area.

The first display layer 23 includes a first liquid crystal layer 26,
The first pixel electrode 30, the first sealing plate 33, and the spacer (first
.. Are provided. More specifically, the spacers 41 are provided on the common electrode 29 at predetermined intervals.
are arranged, and a first sealing plate 33 is provided on the spacers 41a. Further, on the first sealing plate 33, a first pixel electrode 30 patterned into a predetermined shape is formed.

As shown in FIG. 3, the first display layer 2
A second display layer 24 and a third display layer 25 having substantially the same structure as the first display layer 23 are provided on 3. That is, the second display layer 24 includes the second liquid crystal layer 27 and the second pixel electrode 3.
1, second sealing plate 34 and spacer (second support member) 41
are provided, while the third display layer 25 includes a third liquid crystal layer 28, a third pixel electrode 32, a third sealing plate 35, and spacers (third support members) 41c. It is provided and configured.

Here, the first to third display layers 23 to 25 are described.
Are provided with three-dimensional wiring pads 42, 42 '(see FIG. 4). Openings 42a and 42'a are provided in the three-dimensional wiring pads 42 and 42 ', respectively. Further, the second sealing plate 34 and the third sealing plate 35 are provided with contact holes 43.
Are provided with contact holes 44. Thereby, for example, the first pixel electrode 30 is connected to the three-dimensional wiring pad 4.
2 and contact holes 43.4 in FIG.
4 is electrically connected to a connection terminal 54 via a relay electrode 51 provided on the connection terminal 4. On the other hand, the second pixel electrode 31
It is electrically connected to the connection terminal 55 via the opening 42 ′ a in the three-dimensional wiring pad 42 ′ and the relay electrodes 51 provided in the contact holes 43 and 44. Further, the third pixel electrode 32 is electrically connected to the connection terminal 56 via the contact hole 44.

The first to third liquid crystal layers 26 to 28 are filled with a guest host liquid crystal. More specifically, the guest-host liquid crystal includes, for example, a dichroic dye having three primary colors of cyan, magenta and yellow as guests, and a chiral agent having a twist pitch of 7 μm, respectively. A chiral nematic liquid crystal added to a mixture dissolved in water is used.

The first and second pixel electrodes 30 and 31 are made of a transparent ITO film as shown in FIG. Further, the first pixel electrode 30 is connected to the TFT 14 via the relay electrode 51 and the connection terminal 54, and is also used as the first liquid crystal layer 26 and the second liquid crystal layer 27. That is, the first liquid crystal layer 26 is used as a pixel electrode, and the second liquid crystal layer 27 is used as a counter electrode. Similarly, the second pixel electrode 31 also
The liquid crystal layer 27 is used as a pixel electrode and the third liquid crystal layer 28 is used as a counter electrode. The third pixel electrode 32 has a thickness of 5
It is made of aluminum with a thickness of 00 nm and also has a function as a reflection film.

The first to third sealing plates 33 to 35 are made of a film-like polymer compound. In the present embodiment, the film thickness of each of the first to third sealing plates 33 to 35 is 1.0.
It is set to μm.

Each of the spacers 41a to 41c is a quadrangular prism having a square cross section of about 10 μm on a side and a height of 4 mm.
μm. In addition, the spacers 41a to 41c are respectively
The third display layers 23 to 25 are regularly arranged at a pitch of 50 μm. That is, with such a shape and arrangement, the thickness unevenness of each of the first to third liquid crystal layers 26 to 28 due to the drooping of the first to third sealing plates 33 to 35 is prevented, and the effective liquid crystal layer is about 95% effective. An aperture ratio is ensured. Further, a structure excellent in mechanical strength can be obtained. Incidentally, the area density (size and arrangement pitch) of the spacers 41a to 41c is not limited to the above, and each of the first to third sealing plates 35 may be changed depending on the material and film thickness.
The third liquid crystal layers 26 to 28 may be set so that lamination and the effective aperture ratio can be ensured.

The three-dimensional wiring pads 42, 42 '
The cross-sectional shape is a quadrangular prism made of a square with a side of about 30 μm, and the height is 4 μm. Also, the three-dimensional wiring pad 42
42 'has openings 42a and 42'a for three-dimensional wiring
(Diameter: 10 μm).

As shown in FIG. 2, the connection terminals 54 to 56 are made of rectangular aluminum having a width U = 50 μm and a length V = 150 μm, and the pitch between the connection terminals is 100 μm.

As shown in FIG. 6, the anisotropic conductive adhesive 2 is an adhesive bead formed by coating an epoxy resin 72 on a bead 71 (made of acrylic resin) having a diameter of 5 μm covered with a gold plating 73. The anisotropic conductive adhesive 2 is spread on the array substrate 1 so as to have a distribution density at which the array substrate 1 and the display unit 3 can be electrically connected at least. More specifically, the anisotropic conductive adhesive 2a
-C are pressed through the beads 71 so that the drive electrodes 15-17 and the connection terminals 54-56 are in a conductive state, respectively. Thereby, as shown in FIG. 6B, the epoxy resin 72 is deformed so that its shape becomes flat. As a result, a short circuit with the adjacent anisotropic conductive adhesive 2 can be prevented.

Next, a method for manufacturing the liquid crystal display device according to the first embodiment will be described.

First, as shown in FIG.
A transparent common electrode 29 made of indium tin oxide is formed thereon. Next, a light-shielding film 61 made of chromium is formed on portions corresponding to the spacers 41a and the three-dimensional wiring pads 42 and 42 ', and then a positive resist (trade name: OFP)
R800, manufactured by Tokyo Ohka Co., Ltd.) to a thickness of 4.0 μm using, for example, a spinner. Furthermore, by exposing and developing from the substrate 21 side, as shown in FIG.
The spacers 41a and the three-dimensional wiring pads 42 and 42 'are formed.

Next, a film-type negative resist having a thickness of 1.0 μm, in which an adhesive layer made of a urethane resin having a thickness of 0.2 μm is applied on the spacers 41 a. Laminate. As a result, the negative resist is bonded to the spacers 41a and the like, and ultraviolet rays are irradiated from the negative resist side. This allows
The negative type resist is polymerized and cured, and the first sealing plate 3
Form 3 Here, the periphery of the display area without the spacer 41a, that is, the non-display area is formed by the substrate 21 and the first sealing plate 33.
The liquid crystal injection port is provided by providing a spacer in a part of the non-display area.

Subsequently, the first sealing plate 3 is formed by sputtering.
3, an ITO film is formed, and a first pixel electrode 30 is formed by photolithography and etching.

Next, a guest-host liquid crystal in which a cyan dichroic dye is dissolved in a positive-type chiral nematic liquid crystal is injected from the above-mentioned injection port and sealed, and as shown in FIG. One liquid crystal layer 26 is formed.

Further, the second liquid crystal layer 27 is formed in the same manner as the first liquid crystal layer 26. That is, first, a positive resist is applied on the first pixel electrode 30 and exposed from the substrate 21 side, and the spacers 41b... And the three-dimensional wiring pads 42, 42 'are self-aligned at the same position as the first liquid crystal layer 26. Form.

Then, a film-type negative resist coated with an adhesive layer is laminated on the spacers 41b and the three-dimensional wiring pads 42 and 42 '. Further, FIG.
As shown in (b), the opening 4 having a diameter of 10 μm is formed at the center of the three-dimensional wiring pad 42 by ordinary mask exposure.
By irradiating ultraviolet rays while shielding the position of 2a, and developing,
The opening 42a is opened in the film of the film resist, and the other portions are cured to form the second sealing plate 34. Here, the substrate 21 and the second sealing plate 34 are adhered to the periphery of the display region without the spacer 41b. However, by providing a spacer in a part of the non-display region, a liquid crystal injection port is provided. Have been.

Subsequently, the second sealing plate 3 is formed by sputtering.
4, an ITO film is formed, and the second pixel electrode 31 and the relay electrode 51 are formed by photolithography and etching. Further, a guest-host liquid crystal obtained by dissolving a magenta dichroic dye in a positive-type chiral nematic liquid crystal is injected from the above-described injection port, and a second liquid crystal layer 27 is formed as shown in FIG.

Further, the third liquid crystal layer 28 is formed in the same manner as the second liquid crystal layer 27. That is, first, the spacers 41c... And the three-dimensional wiring pads 42.4 are formed on the second pixel electrode 31.
2 ′ is formed in a self-aligned manner. Further, the spacer 41c
And a film-shaped negative resist coated with an adhesive layer is laminated on the three-dimensional wiring pads 42 and 42 '.

Further, the openings 42a and 42'a in the three-dimensional wiring pads 42 and 42 'are formed by ordinary mask exposure.
Then, ultraviolet rays are irradiated while shielding the position (2), the openings 42a and 42'a are opened in the negative resist, and the other portions are cured to form the third sealing plate 35. Here, the spacer 4
The substrate 21 and the third sealing plate 35 are bonded to each other in the peripheral portion of the display region where there is no 1; however, a liquid crystal injection port is provided by providing a spacer in a part of the non-display region.

Subsequently, the third sealing plate 3 is formed by sputtering.
5, an aluminum film is formed so as to have a thickness of 500 nm, and is subjected to photolithography and etching.
The third pixel electrode 32 and the relay electrode 51 are formed. Furthermore,
A guest-host liquid crystal in which a yellow dichroic dye is dissolved in a positive-type chiral nematic liquid crystal is injected from the above-described injection port to form a third liquid crystal layer 28 as shown in FIG. 9B.

Further, in the present embodiment, a negative resist having a film thickness of 5 μm (trade name:
FVR, manufactured by Fuji Pharmaceutical Co., Ltd.). Subsequently, a mask is applied to a position where the contact hole 44 is to be formed, and the negative resist is irradiated with light and cured. As a result, FIG.
As shown in (a), the polymer resin layer 22 having the contact holes 44 can be formed. The polymer resin layer 22 has a pencil hardness of about 4H according to a JIS test. Thereby, when the array substrate 1 and the display unit 3 are bonded to each other via the anisotropic conductive adhesive 2, the anisotropic conductive adhesive 2 is sunk into the third sealing plate 35 or the like, so that irregularities are formed. Prevent it from occurring.

Subsequently, an aluminum film having a thickness of 500 nm is formed on the polymer resin layer 22 by a sputtering method, and is patterned into a predetermined shape. Thus, the connection terminals 54 to 56 are formed as shown in FIG.

Here, an inspection process for inspecting the display state of the display unit 3 is performed. That is, a voltage is applied to the connection terminals 54 to 56 using an inspection machine, and the first to third liquid crystal layers 26 to
28 is driven. Thereby, the first to third liquid crystal layers 26 are formed.
When the voltage is turned off, each of the liquid crystal layers 28 to 28 becomes cyan, magenta, or yellow, and becomes transparent when the voltage is turned on, so that the operation states of the first to third liquid crystal layers 26 to 28 can be inspected. . Here, when a defect such as a point defect or a line defect is found on the display unit 3, only the display unit 3 is discarded. As described above, since the inspection process is performed before the array substrate 1 and the display unit 3 are bonded to each other, even if a defect is found in the display unit 3, it is not necessary to discard the array substrate 1 and the like together with the display unit 3. As a result, the cost can be reduced and the yield can be improved.

Further, the TFTs 12 to 14 and the TF
Anisotropic conductive adhesives 2 are sprayed on the glass substrate 11 on which the drive electrodes 15 to 17 and the like, which are the drain ends of T, are formed. At this time, the anisotropic conductive adhesive 2 is connected to the connection terminal 5.
It is desirable to adjust the amount of spraying appropriately so that at least one or more pieces are distributed on 4 to 56.

Subsequently, after aligning the connection terminals 54 to 56 with the drive electrodes 15 to 17, the array substrate 1 and the display section 3 are bonded. For positioning, it is sufficient that the planar relative position between the array substrate 1 and the display unit 3 is kept within a certain precision, and strict precision is not required. In addition, the bonding is performed while pressing at a load of 0.2 atm and heating at 120 ° C. Thus, by applying a load of 0.2 atm, the epoxy resin 72 in the anisotropic conductive adhesive 2 is deformed into an elliptical shape. As a result, the gold plating 73 becomes, for example, the driving electrode 15.
And the connection terminal 56 to make it conductive. At the same time, since the epoxy resin 72 is deformed into an elliptical shape as described above, the epoxy resin 72 has an insulating function in a direction perpendicular to the film thickness direction.

Further, by heating at 120 ° C. as described above, the epoxy resin 72 can be cured. Therefore, the drive electrodes 15 to 17 and the connection terminals 54 to 56
The array substrate 1 and the display unit 3 can be bonded to each other in a state where the conduction state with the display substrate 3 is maintained.

When the reflective liquid crystal display device according to the first embodiment manufactured as described above is driven by inputting an image signal or the like to the array substrate 1, a bright color image is displayed. Was confirmed. Further, in the above liquid crystal display device, since the array substrate 1 and the display portion having the first to third liquid crystal layers 26 to 28 are independent elements, even if a display defect is found in the liquid crystal layer or the like, the TFT 12 to the liquid crystal layer 12 to the liquid crystal layer 12 to It is not necessary to discard even the array substrate 1 on which the elements 14 and the like are formed, so that the manufacturing cost can be reduced and the yield can be improved.

In the first embodiment, as the anisotropic conductive adhesive 2, gold-plated acrylic resin beads 71 coated with epoxy resin 72 are shown.
The present invention is not limited to this. That is, an adhesive having conductivity only in the thickness direction of the liquid crystal display device may be used. Also, even if a conductive adhesive having no anisotropy with respect to the thickness direction is used, the conductive adhesives are not short-circuited with adjacent pixels by conduction.
It can be used if careful attention is paid to the application density.

In the first embodiment, a mode in which a TFT is used as a nonlinear element has been described.
A two-terminal element such as a diode may be used. Alternatively, a resin substrate on which a driver IC is mounted, such as a multilayer circuit substrate, may be used instead of the array substrate. Even in the above case, the cost can be further reduced as long as the production value is high and the added value is large.

Further, in the present embodiment, the third pixel electrode 32 is employed as a reflection film, but the present invention is not limited to such a structure. For example, a structure in which the third pixel electrode 32 is a transparent electrode and a common electrode made of aluminum or the like may be a reflective film, or a structure formed on the surface of the glass substrate 11 or the substrate 21 may be used. .

Further, in the present embodiment, the film thickness of the first to third sealing plates 33 to 35 is 1.0 μm, but the film thickness is not limited to this, .5 μm-10
It may be within the range of μm.

More specifically, for example, as the film thickness of the first sealing plate 33 is smaller, the voltage value of the voltage applied to the liquid crystal layer 26 can be made smaller, so that the driving voltage of the TFTs 12 to 14 can be reduced. Therefore, it is desirable that the film thickness of the first sealing plate 33 is thin. However, if the first sealing plate 33 is too thin, it deforms when forming the first pixel electrode 30 and causes wrinkles and cracks. Therefore, the thickness of the first sealing plate 33 is
It is desirable that the thickness be 0.5 μm or more. On the other hand, if the thickness of the first sealing plate 33 is large, the distribution density of the spacers 41 can be reduced, but there is a problem that the voltage applied to the first liquid crystal layer 26 decreases. Therefore, it is desirable to regulate the thickness of the first sealing plate 33 to 10 μm or less.

(Embodiment 2) Embodiment 2 of the present invention will be described below with reference to FIG. 11 and FIG. Note that the same components as those of the liquid crystal display device according to the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the first embodiment, the reflection type liquid crystal display device in which three liquid crystal layers are sequentially laminated is described. However, in the second embodiment, the liquid crystal display in the case where the liquid crystal layer is a single layer is described. The device will be described.

FIG. 11 is a sectional view showing the structure of the liquid crystal display according to the second embodiment.

The liquid crystal display device is provided with a display section 91, a drive substrate 92, and an adhesive 93 for bonding the display section 91 and the drive electrodes 92.

In the drive substrate 92, pixel electrodes 86 made of Al or the like are formed at a predetermined pitch on the surface of the resin wiring substrate 87 facing the display section 91, while various LSIs are formed on the outside. And a driver circuit 90 and the like are mounted. The resin wiring board 87 is made of glass epoxy resin. A through hole 88 for electrically connecting the pixel electrodes 86 to the driver circuit 90 is provided inside the resin wiring board 87.

On the other hand, the display section 91 is configured by providing a display layer 89 on a plastic substrate 81.
Further, on the plastic film substrate 81, ITO
A transparent electrode 83 made of a film is provided on the entire surface. Further, a film thickness of 100
Polarizing plate 8 made of μm polyethylene vinyl alcohol
2 are provided.

The display layer 89 includes a spacer 95, a sealing plate 84, and a liquid crystal layer 85. The sealing plate 84 is made of PET (Polyethilene T) having a thickness of 1 μm.
elephthalate) film. The PET film is thinned by stretching and has a birefringence of about 0.05 μm. The liquid crystal layer 85 has a twist pitch of 32 μm.
m is a chiral nematic liquid crystal to which a chiral agent is added. As a result, the liquid crystal molecules in the vicinity of the sealing plate 84 are horizontally oriented in the stretching direction of the film, and have a twisted nematic orientation twisted by 45 degrees in the liquid crystal layer 85. still,
The gap of the liquid crystal layer 85 is 4 μm.

The adhesive 93 is made of a urethane resin having a thickness of 1 μm. Here, the adhesive 93 is not limited to the urethane resin, and various kinds of conventionally known adhesives can be employed.

Next, a method for manufacturing the liquid crystal display device according to the present embodiment will be described.

First, a plastic film substrate 81 provided with a polarizing plate 82 made of polyethylene vinyl alcohol
A transparent electrode 83 made of an ITO film is formed over the entire upper surface by, for example, a sputtering method. Next, in the same manner as in the first embodiment, a light-shielding film 61 made of chromium is formed on portions corresponding to the spacers 95, and then a resist film is applied so as to have a thickness of 4.0 μm. Furthermore,
Exposure and development from the plastic film substrate 81 side,
The spacers 95 are formed.

Next, a high-molecular resin material made of PET is thinned by stretching, and a PET film having a thickness of 1.0 μm is manufactured in advance. Further, an adhesive layer made of a urethane resin having a thickness of 0.2 μm is applied on the PET film,
Heat-pressing is performed on spacers 95 by rolls 94 shown in FIG. Thereby, the PET
The film is adhered to the spacers 95 to form a sealing plate 84. Here, the plastic film substrate 81 and the sealing plate 84 are bonded to the periphery of the display area where the spacers 95 are not formed, that is, the non-display area, but the spacer 95 is provided in a part of the non-display area. Thus, a liquid crystal injection port is provided.

Subsequently, a chiral nematic liquid crystal having a twist pitch of 32 μm was injected from the injection port, and a liquid crystal layer 85 was formed.
To form

Next, an adhesive 52 made of urethane resin is provided on the side of the sealing plate 84 where the liquid crystal layer 85 is not formed.
Is applied.

On the other hand, an Al film is formed on the resin wiring substrate 87 by, for example, a sputtering method, and is patterned into a predetermined shape to form pixel electrodes 86. Further, a driver circuit 9 is provided outside the resin wiring board 87.
Implement 0.

Further, the display section 91 and the driving substrate 92 are hot-pressed with a heated roll and adhered by an adhesive 93. Thereby, the reflective liquid crystal display device according to the second embodiment can be manufactured.

As described above, the reflective liquid crystal display device according to the second embodiment differs from the first embodiment in that the liquid crystal layer 85 is formed between the common electrode 83 and the sealing plate 84, and The pixel electrodes 86 are formed on the resin wiring substrate 87, and the pixel electrodes and the like are not formed on the sealing plate 84. Therefore, in the reflective liquid crystal display device, it is not necessary to manufacture the display section 91 in accordance with the pattern shape of the pixel electrodes 86 on the drive substrate 92. Therefore, even when the display pattern is changed depending on the application, the display section 91 is made of resin. It can be easily manufactured simply by changing the formation pattern of the pixel electrodes 86 on the wiring board 87 side.

That is, the display layer can correspond to various array substrates having various display patterns depending on the application. Further, as described above, the cost can be reduced because the display layer can support other display patterns.

In addition, when the display section 91 and the drive board 92 are bonded, their planar relative positions may be arbitrarily set, so that alignment is not required and mounting is easy. Further, since the display section 91 is formed in close contact with the resin wiring board 87 made of glass epoxy resin, it is resistant to bending, bending, and the like. This makes it possible to use a very thin plastic film substrate. Therefore,
An extremely thin and lightweight reflective liquid crystal display device in which a plastic liquid crystal using a plastic film substrate as a substrate is integrated with a resin wiring substrate 87 can be realized. still,
As described above, on the resin wiring board 87, various peripheral circuits necessary for realizing functions such as displaying an image are mounted. Therefore, mounting the pixel electrodes 86... And the driver circuit 90 on the resin wiring board 87 does not itself increase the cost.

In this embodiment, the sealing plate 84
Although the film thickness was 1.0 μm, the film thickness is not limited to this, and may be in the range of 0.5 μm to 10 μm. More specifically, for example, as the thickness of the sealing plate 84 is smaller, the voltage value of the voltage applied to the liquid crystal layer 85 is larger, so that the driving voltage can be reduced. Therefore,
It is desirable that the thickness of the sealing plate 84 be thin. However, if the sealing plate 84 is too thin, it is deformed when forming the pixel electrode 86, and wrinkles and cracks are generated. Therefore, it is desirable that the thickness of the sealing plate 84 be 0.5 μm or more.

On the other hand, if the thickness of the sealing plate 84 is large, the distribution density of the spacers 95 can be reduced, but the voltage applied to the liquid crystal layer 85 decreases. Here, if the thickness of the sealing plate 84 is equal to or smaller than the gap of the liquid crystal layer 85, the liquid crystal layer 85 can be driven at a relatively low voltage without providing a pixel electrode on the sealing plate 84. It is preferably 10 μm or less.

(Embodiment 3) Embodiment 3 of the present invention is described below with reference to FIG. 13 and FIG. The first embodiment or the second embodiment
The same components as those of the liquid crystal display device according to the above are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the liquid crystal display device according to the third embodiment, a plurality of liquid crystal panels having a pixel pitch of 330 μm and having the number of pixels of 600 × 800 × trio (× 3) are arranged to form a multi-screen display which constitutes a large screen display. Screen LCD. More specifically, as shown in FIG. 13, the liquid crystal display device includes a display unit 201, an array substrate 202, and a display unit 2
01 and an adhesive 107 for adhering the array substrate 202.

The adhesive 107 is a transparent acrylic thermosetting adhesive and is solventless. Further, the display section 201 has a configuration in which a liquid crystal layer 103 is provided between the substrate 110 and the sealing plate 84 as shown in FIG. The sealing plate 84 is supported by a spacer 109. The polarizing plate 1 is provided outside the substrate 110.
05 is provided. Further, a color filter layer 101 is formed on the inner surface of the substrate 110, and a common electrode 29 is formed on the color filter layer 101. Further, an alignment film 102 is formed on the common electrode 29. Also, on the sealing plate 84, 1200 × 1600 × 3 rectangular pixel electrodes 104 are provided in a matrix at intervals of, for example, 110 μm.

The substrate 110 has a diagonal dimension of 85 cm.
Made of rectangular glass. The liquid crystal layer 103 has a configuration in which a chiral nematic liquid crystal having a twist pitch of 50 μm is twisted by 90 degrees and twisted nematic. The alignment film 102 is made of a polyimide resin.

The spacer 109 is a quadrangular prism having a square cross section of about 10 μm on a side and a height of 5.0.
μm. The spacers 109 are regularly arranged on the common electrode 9 at a pitch of 50 μm. With such a shape and arrangement, the thickness unevenness of the liquid crystal layer 103 due to the sagging of the sealing plate 84 is prevented, and an effective aperture ratio of about 95% is secured. Incidentally, the area density (size and arrangement pitch) of the spacers 109 is not limited to the above, and the lamination of the liquid crystal layer 103 and the securing of the effective aperture ratio are performed in accordance with the material and thickness of the sealing plate 84. What is necessary is just to set it as possible.

The color filter layer 101 is made of R.G.
-Each sub-pixel B is arranged in a stripe pattern at a pitch of, for example, 110 μm.

The array substrate 202 includes four array substrates 202a to 202d. For example, the array substrate 202a has a configuration in which a plurality of TFTs 12 whose semiconductor layers are made of amorphous silicon are provided on a glass substrate 11a. The TFTs 12 are provided in a matrix at a pitch of 330 μm. Also, the above TFT
Aluminum terminals 108 made of aluminum are provided on the side of the drain electrode 12 (not shown). The height of the aluminum terminal 108 in the thickness direction is 500 nm.
It is. The mounting portion 1 for forming the drive circuit 113 is provided on the periphery of two orthogonal sides of the array substrate 202a.
11 are provided. The array substrates 202b to 20b
1d has substantially the same structure as the array substrate 202a.

Next, a method for manufacturing the liquid crystal display device according to the third embodiment will be described.

First, the common electrode 29 is formed on the substrate 110 on which the color filter layer 101 has been previously provided by a sputtering method or the like. Further, a polyimide resin is applied on the common electrode 29, and a rubbing process is performed in a predetermined direction to form an alignment film 102.

Subsequently, similarly to the second embodiment,
After a light-shielding film made of chromium is formed on a portion corresponding to the spacer 109, a positive resist is applied to a thickness of 5.0 μm using, for example, a spinner or the like. Further, the substrate 110
By exposing and developing from the side, the spacers 109 ...
To form

Next, a sealing film 84 is formed by laminating a 1.0 μm thick PET film coated with an adhesive layer made of a urethane resin having a thickness of 0.2 μm. Here, the PET film is previously thinned by stretching.
The stretching is performed so that the stretching direction is orthogonal to the rubbing direction in which the rubbing treatment is performed when the alignment film is formed. As a result, the liquid crystal molecules near the sealing plate 84 are oriented in a direction parallel to the stretching direction, and the liquid crystal molecules near the alignment film 102 are oriented in a direction parallel to the rubbing direction. can do.
Note that the substrate 110 and the sealing plate 84 are bonded to each other in the periphery of the display region without the spacer 109, but by providing the spacer 109 in a part of the non-display region, a liquid crystal injection port is provided. I have.

Subsequently, an ITO film is formed on the sealing plate 84, and the pixel electrodes 104 are formed by photolithography and etching. Further, a chiral nematic liquid crystal is injected from the above-described injection port and sealed, thereby forming a liquid crystal layer 103.

Next, TFTs 12 are formed on a glass substrate by a conventionally known method. Further, an aluminum terminal 1 made of aluminum is provided on the drain electrode side of the TFTs 12.
08 ... are formed. Further, the glass substrate is cut by a scriber so that mounting portions 111 for mounting a driving circuit are provided on two orthogonal sides, and the array substrate 202a
To d. Here, an error of about 30 μm occurs in the actual actual dimensions of the cutting with respect to the set dimensions at the time of the cutting, and the array substrate 202a is slightly shifted from the array substrate 202b toward the center. Subsequently, as shown in FIG. 14, the array substrates 202a to 202d are fixed by the housing 112 such that the mounting portions 111 face outward.

Further, an adhesive 107 is formed on the sealing plate 84 and the pixel electrode 104 in the display section 201. Subsequently, the display unit 102 was aligned with the array substrates 202a to 202d fixed to the housing 112, and heated while being pressed at a predetermined pressure to cure the adhesive 107.
Here, the above alignment is not required as long as the planar relative positions of the array substrates 202a to 202d and the display unit 201 are kept within a certain accuracy, and a strict accuracy requirement is not required.

Next, a polarizing plate 105 was formed outside the substrate 110, and a polarizing plate 106 was formed outside the array substrates 11a to 11d. Finally, a backlight is provided outside the glass substrate 11. Thus, a transmission type liquid crystal display device according to the third embodiment was obtained.

As described above, the transmission type liquid crystal display device according to the third embodiment has the advantages of the first embodiment,
In addition, a seam between the array substrates 202a to 202d does not appear on the display screen, so that a large-screen continuous image can be displayed.

More specifically, in a conventional multi-screen LCD, a plurality of liquid crystal panels are arranged and formed. This liquid crystal panel is provided with a mounting portion for providing a drive circuit at a peripheral portion of the display area. Therefore, when a plurality of such liquid crystal panels are arranged, an interval is provided between the display areas of the respective liquid crystal panels, and the pitch between the pixel electrodes becomes uneven at the joint between the liquid crystal panels. As a result, the image was interrupted on the display screen, and the seam was visually recognized. Conventionally, in order to make this seam inconspicuous, when the pixel pitch is coarsened or the adjacent panels are arranged, they are precisely arranged so that the difference between the actual dimensions of the cut and the set dimensions at the time of the cut is reduced. And so on. However, since the liquid crystal panel is mechanically cleaved, there is an unavoidable problem that it is difficult to dispose the liquid crystal panel precisely so that no seam can be felt.

However, in the transmission type liquid crystal display device according to the third embodiment, the pixel electrodes 104 are arranged at a predetermined pixel pitch on the display section 201, and the array substrates 202a to 202d Is not provided. Therefore, the pitch of the pixel electrodes 104 does not become non-uniform, and as a result, an image displayed on the display screen can be prevented from being discontinuous. Moreover, the array substrates 202a to 202d
There is no need to perform precise positioning when placing in the same plane. Further, since there is no need to make the pixel pitch coarse as described above, the definition is high. As described above, in the present embodiment, it is possible to provide a liquid crystal display device capable of displaying a continuous image on a large screen without a seam appearing on the display screen unlike the conventional multi-screen LCD. .

[0126]

The present invention is embodied in the form described above and has the following effects.

That is, since the display layer having the liquid crystal layer and the array substrate having the non-linear element are connected by the connection means having conductivity, for example, even if a display defect is found in the liquid crystal layer or the like. In addition, it is not necessary to discard the array substrate on which the non-linear element is formed. As a result, it is possible to provide a full-color liquid crystal display device with reduced manufacturing cost and improved yield. Furthermore, since the planar relative position between the pixel electrode and the drive electrode only needs to be within the range that can be connected by the connection means, there is an effect that the requirement for accuracy of alignment can be eased.

Further, the display substrate having the pixel electrodes and the driving circuit and the display layer having the liquid crystal layer and the common electrode are bonded with an adhesive so that the display layer is formed on the driving electrode of the driving substrate. It is not necessary to manufacture according to the pattern shape. Therefore, the display layer can be used corresponding to an array substrate having various different display patterns depending on the application. Further, when the display layer and the driving substrate are bonded, their planar relative positions may be arbitrarily set, so that alignment is not required and mounting is easy. Furthermore, there is an effect that it is possible to provide a liquid crystal display device which is thin and lightweight and has resistance to deformation such as bending, and a method for manufacturing the same.

Furthermore, by forming a display layer having a plurality of pixel electrodes at regular intervals and a plurality of array substrates having a non-linear element with an adhesive, a joint between the array substrates is formed on the display screen. To prevent it from being viewed. Therefore, there is an effect that a multi-screen liquid crystal display device in which seams between panels are not conspicuous and a method of manufacturing the same can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view schematically showing a liquid crystal display device according to Embodiment 1 of the present invention.

FIG. 2 is a plan view schematically showing a TFT in the liquid crystal display device.

FIG. 3 is a schematic cross-sectional view schematically showing a display section in the liquid crystal display device.

FIG. 4 is a schematic cross-sectional view schematically showing a main part of the liquid crystal display device.

FIG. 5 is a cross-sectional plan view schematically showing a display unit in the liquid crystal display device.

FIG. 6 is a schematic cross-sectional view schematically showing an anisotropic conductive adhesive in the liquid crystal display device.

FIG. 7 is an explanatory diagram illustrating a manufacturing process of the liquid crystal display device according to the first embodiment.

FIG. 8 is an explanatory diagram illustrating a manufacturing process of the liquid crystal display device according to the first embodiment.

FIG. 9 is an explanatory diagram illustrating a manufacturing process of the liquid crystal display device according to the first embodiment.

FIG. 10 is an explanatory diagram illustrating a manufacturing step of the liquid crystal display device according to the first embodiment.

FIG. 11 is a schematic sectional view schematically showing a liquid crystal display device according to a second embodiment of the present invention.

FIG. 12 is an explanatory diagram illustrating a manufacturing process of the liquid crystal display device according to the second embodiment.

FIG. 13 is a schematic cross-sectional view schematically showing a liquid crystal display device according to Embodiment 3 of the present invention.

FIG. 14 is a plan view schematically showing an array substrate in the liquid crystal display device.

FIG. 15 is a schematic cross-sectional view schematically showing a conventional liquid crystal display device.

[Explanation of symbols]

1, 202 array substrate 2a-c anisotropic conductive adhesive (connecting means, first to third connecting means) 3, 91, 201 display unit 11 substrate 12 to 14 TFT (first to third non-linear element) 15 to Reference Signs List 17 drive electrode (first to third drive electrodes) 21 glass substrate 22 polymer resin layer 23 first display layer 24 second display layer 25 third display layer 26 to 28, 85, 103 liquid crystal layer 29, 83 common electrode 30 1st pixel electrode 31 2nd pixel electrode 32 3rd pixel electrode 33 1st sealing plate 34 2nd sealing plate 35 3rd sealing plate 41a-c, 95,109 spacer 42, 42 'Three-dimensional wiring pad 43, 44 contact hole 54 to 56 connection terminal 61 light shielding film 71 bead 72 epoxy resin 73 gold plating 81 plastic film substrate 84 sealing plate 86, 104 pixel electrode 87 resin wiring substrate 90 Driver circuit 92 Drive board 93, 107 Adhesive material 102 Alignment film 105, 106 Polarizer 108 Aluminum terminal

──────────────────────────────────────────────────の Continued on the front page (72) Inventor Takeshi Karasawa 1006 Kazuma Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. (56) References JP-A-9-258256 (JP, A) JP-A-9-265595 (JP, A) JP-A-8-328031 (JP, A) JP-A-8-313939 (JP, A) JP-A-9-80464 (JP, A) JP-A-9-26596 (JP, A) JP-A-8-146456 (JP, A) JP-A-9-80401 (JP, A) JP-A-10-48661 (JP, A) JP-A-10-221708 (JP, A) JP-A-10-260427 (JP, A) JP-A-10-268330 (JP, A) JP-A-11-24090 (JP, A) JP-A-11-174488 (JP, A) JP-A-10-213790 (JP, A) JP-A-11-174790 30781 (JP, A) JP-A-11-149089 (JP, A) JP-A-11-167102 (JP, A) JP-A-11-264965 (JP, A) JP-A-11-271780 (JP, A) (58) Field surveyed (Int.Cl. ⁷ , DB name) G02F 1/1347 G02F 1/1345

Claims (16)

(57) [Claims] 1. A liquid crystal is filled between a substrate having a common electrode provided on an inner surface thereof and a sealing plate supported by a support member provided on the common electrode to form a liquid crystal layer. A display layer formed by providing a pixel electrode on a surface of the sealing plate opposite to the surface facing the liquid crystal layer; a non-linear element for driving the liquid crystal layer; and electrically connected to the non-linear element And a drive electrode for outputting a drive voltage for driving a liquid crystal layer is provided on the pixel electrode, and has a function of being electrically connected to an array substrate arranged to face the substrate, and A connection unit having a function of fixed connection, wherein the connection unit electrically connects the pixel electrode and the drive electrode, and the display layer and the array substrate are fixedly connected. Liquid crystal display. 2. The liquid crystal display device according to claim 1, wherein said connection means is an anisotropic conductive adhesive. 3. A structure in which liquid crystal is filled between a substrate and a sealing plate to form a liquid crystal layer, and the sealing plate is supported by a supporting member existing between the substrate and the sealing plate. A liquid crystal display device, comprising: a display layer; and an array substrate provided with a non-linear element for applying a electric field to the liquid crystal layer to perform dimming driving of the liquid crystal layer and arranged to face the substrate. The display layer is supported by a common electrode provided on the inner side surface of the substrate and a first support member formed on the common electrode, and has a second electrode on a surface opposite to a surface facing the common electrode. A first liquid crystal layer is formed by filling a liquid crystal between a first sealing plate provided with one pixel electrode, and the first sealing plate and a first liquid crystal layer formed on the first sealing plate are formed on the first sealing plate. 2 A second pixel electrode is provided on a surface supported by the support member and opposite to the surface facing the first pixel electrode. A second liquid crystal layer formed by filling a liquid crystal between the second sealing plate and the second sealing plate, and including at least one layer of the second liquid crystal layer; A first drive electrode for outputting a drive voltage for driving the first liquid crystal layer to the first pixel electrode, a first nonlinear element electrically connected to the first drive electrode, (2) At least one or more second drive electrodes for outputting a drive voltage for driving the liquid crystal layer, and at least one or more second nonlinear elements electrically connected to the second drive electrodes are provided. And a first and a second connection means having an electrical connection function and a fixed connection function, wherein the first connection terminal and the first drive electrode are connected to the first drive electrode. The second connection terminal is electrically connected to the second drive terminal through a connection means; The above is connected to the second electrically via the connecting means, and a liquid crystal display device, characterized in that the display layer and the array substrate are fixedly connected by the first and second connecting means. 4. A structure in which a liquid crystal is filled between a substrate and a sealing plate to form a liquid crystal layer, and the sealing plate is supported by a supporting member existing between the substrate and the sealing plate. A liquid crystal display device, comprising: a display layer; and an array substrate provided with a non-linear element for applying a electric field to the liquid crystal layer to perform dimming driving of the liquid crystal layer and arranged to face the substrate. The display layer is supported by a common electrode provided on an inner surface of the substrate and a first support member formed on the substrate, and has a first electrode on a surface opposite to a surface facing the common electrode. Liquid crystal is filled between the first sealing plate provided with the pixel electrodes to form a first liquid crystal layer, and the first sealing plate and the second liquid crystal layer formed on the first sealing plate are formed. A second pixel electrode is provided on a surface supported by the support member and opposite to the surface facing the first pixel electrode. A liquid crystal is filled between the second sealing plate and the second sealing plate to form a second liquid crystal layer. The second liquid crystal layer is supported by the second sealing plate and a third supporting member formed on the second sealing plate. A third liquid crystal layer is formed by filling liquid crystal between a third sealing plate provided with a third pixel electrode on a surface opposite to a surface facing the second pixel electrode and a third liquid crystal layer; One pixel electrode is electrically connected to a first connection terminal, the second pixel electrode is electrically connected to a second connection terminal, and the third pixel electrode is electrically connected to a third connection terminal. A first drive electrode for outputting a drive voltage for driving the first liquid crystal layer to the first pixel electrode; and a first non-linear circuit electrically connected to the first drive electrode. A second driving electrode for outputting a driving voltage for driving the second liquid crystal layer to the second pixel electrode; A second non-linear element electrically connected to the second drive electrode; a third drive electrode for outputting a drive voltage for driving the third liquid crystal layer to the third pixel electrode; and a third drive electrode for the third drive electrode. A third nonlinear element that is electrically connected; a first to third connection unit having a function of electrically connecting and a function of fixedly connecting; The first connection terminal and the first drive electrode are electrically connected via the first connection means, and the second connection terminal and the second drive electrode are electrically connected via the second connection means. The third connection terminal and the third drive electrode are electrically connected via the third connection means, and the display layer and the array substrate are fixedly connected by the first to third connection means. A liquid crystal display device comprising: 5. The liquid crystal display device according to claim 1, wherein the first to third liquid crystal layers contain a guest-host liquid crystal including a liquid crystal and a dichroic dye having different colors among cyan, magenta, and yellow. Item 5. A liquid crystal display device according to item 4. 6. A liquid crystal layer is formed by filling a liquid crystal between a substrate having a common electrode provided on an inner surface thereof and a sealing plate supported by a support member provided on the common electrode. A driving layer for driving the liquid crystal layer, and a plurality of pixel electrodes electrically connected to the driving circuit and arranged at predetermined intervals, and facing the substrate. A liquid crystal display device, comprising: an array substrate arranged so that the display layer and the array substrate are connected by connection means. 7. The sealing plate has a thickness of 0.5 μm or more.
7. The liquid crystal display device according to claim 6, wherein the liquid crystal display device is made of a polymer resin having a size of 0 μm or less. 8. The liquid crystal display device according to claim 6, wherein the substrate and the array substrate are made of a polymer resin. 9. A liquid crystal is filled between a substrate having a common electrode provided on an inner side surface thereof and a sealing plate supported by a support member provided on the common electrode, thereby forming a liquid crystal layer. A display layer including a plurality of pixel electrodes provided at regular intervals on a surface of the sealing plate opposite to a surface supported by the support member; and a plurality of nonlinear elements for driving the liquid crystal layer. A plurality of array substrates, wherein the display layer and the array substrate are connected by connection means such that the plurality of pixel electrodes and the plurality of nonlinear elements are electrically connected. Liquid crystal display. 10. The plurality of array substrates are arranged in the same plane, and the display layer and the plurality of array substrates correspond to the plurality of pixel electrodes and the plurality of non-linear elements by the connecting means, respectively. The liquid crystal display device according to claim 9, wherein the liquid crystal display devices face each other within a range where they are electrically connected to each other. 11. The liquid crystal display device according to claim 9, wherein an optical color filter layer is provided between the substrate and the common electrode. 12. The method for manufacturing a liquid crystal display device according to claim 1, wherein a first step of forming a common electrode on the inner surface of the substrate; A second step of forming a support member, a third step of forming the sealing plate so as to be supported by the support member, and sealing the liquid crystal between the substrate and the sealing plate. A fourth step of forming a liquid crystal layer, a fifth step of forming a pixel electrode on a surface of the sealing plate opposite to the surface facing the liquid crystal layer, and driving the liquid crystal layer on the array substrate A method for manufacturing a liquid crystal display device, comprising: a sixth step of forming a non-linear element and a drive electrode for the semiconductor device; and a seventh step of electrically connecting the pixel electrode and the drive electrode by a connection unit. 13. A step of forming another supporting member on the pixel electrode; a step of forming another sealing plate so as to be supported by the other supporting member; Forming another liquid crystal layer by enclosing another liquid crystal between the sealing plate and another liquid crystal layer; and forming another pixel on a surface of the other sealing plate opposite to the surface facing the other liquid crystal layer. 13. The method according to claim 12, wherein the step of forming an electrode is performed at least once each to form a plurality of liquid crystal layers. 14. A method of manufacturing a liquid crystal display device according to claim 1, wherein a first step of forming a common electrode on an inner surface of the substrate; A second step of forming a support member, a third step of forming the sealing plate so as to be supported by the support member, and sealing the liquid crystal between the substrate and the sealing plate. A fourth step of forming a liquid crystal layer; a fifth step of forming a pixel electrode on a surface of the sealing plate opposite to the surface facing the liquid crystal layer; and applying a voltage to the common electrode and the pixel electrode. A sixth step of inspecting a display state, a seventh step of forming a non-linear element and a drive electrode for driving the liquid crystal layer on the array substrate, and, based on an inspection result of the sixth step, Display layer with good display condition Only regarding method of manufacturing a liquid crystal display device characterized by having an eighth step of electrically connecting the connecting means and the pixel electrode and the driving electrode. 15. The method for manufacturing a liquid crystal display device according to claim 6, wherein a first step of forming a common electrode on the surface of the substrate; and a step of forming the support on the common electrode. A second step of forming a member; a third step of forming the sealing plate so as to be supported by the support member; and forming a liquid crystal layer for sealing the liquid crystal between the substrate and the sealing plate. A fourth step, a fifth step of forming a pixel electrode on the other array substrate so as to face the common electrode, and a driving circuit for driving the liquid crystal layer on the other array substrate. A method for manufacturing a liquid crystal display device, comprising: a sixth step of forming; and a seventh step of bonding the substrate and another array substrate with an adhesive. 16. The method of manufacturing a liquid crystal display device according to claim 9, wherein a first step of forming a common electrode on the substrate; and a step of forming the support member on the common electrode. A second step of forming; a third step of forming the sealing plate so as to be supported by the support member; and a plurality of steps on a surface of the sealing plate opposite to a surface supported by the support member. A fourth step of forming the pixel electrodes at a fixed interval from each other; a fifth step of enclosing the liquid crystal between the substrate and the sealing plate to form a liquid crystal layer; A sixth step of forming a plurality of non-linear elements for driving the liquid crystal layer on a substrate, a seventh step of dividing the other array substrate into at least two or more, With multiple nonlinear elements The method of manufacturing a liquid crystal display device characterized by having at connection means, and an eighth step of electrically connecting to corresponding.