JPH10333135A - Liquid crystal display element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent light leakage from a display area peripheral edge part while securing the uniformity of the thickness of a liquid crystal layer without giving an influence to cause malfunction to a driving circuit by sticking a polarizing plate at the outside of a liquid crystal cell to cover a coloring layer and a sealing material forming area. SOLUTION: At the time of forming a red coloring layer 3R, a mask by which the red coloring layer 3R is formed so as to cover the nearly whole part of the peripheral light shielding area Y of the display area peripheral edge part in addition to a coloring pattern part constituting a color filter at a display area X is used, and the red coloring layer 3R is formed at the peripheral light shielding area Y, so that a color filter substrate 1 is made. Then, oriented films 5 and 9 are formed at both substrates 1 and 6, and rubbing processing is performed. Also, an adhesive 12 is formed so as to be superposed on the red coloring layer 3R of the peripheral light shielding area Y. Then, the polarizing plates covering the peripheral light shielding area Y where the adhesive 12 and the red coloring layer 3R are formed are used as the polarizing plates 35 and 36, and are stuck on surfaces at the outside of both substrates 1 and 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a liquid crystal display device.

[0002]

2. Description of the Related Art FIG. 6 is a schematic sectional view of a conventional active matrix type liquid crystal display device.

The active matrix type liquid crystal display element shown in FIG. 6 is configured as follows. First transparent substrate 1
A light-shielding layer 2 ′ formed by patterning a chromium metal film having a thickness of about 0.1 μm into a predetermined shape is formed on the light-shielding layer 2 ′. 3
Are formed. On the light shielding layer 2 ′ and the coloring layer 3,
A common electrode 4 which is a transparent electrode made of TO is formed, and an alignment film 5 made of polyimide is further formed thereon.

On the other hand, a thin film transistor (hereinafter, referred to as a “TFT”) is located on the second transparent substrate 6 at a position facing the light shielding layer 2 ′.
That. A pixel electrode 8 which is a transparent electrode made of ITO is formed at a position facing the opening of the light shielding layer 2 ', and the TFT 7 and the pixel electrode 8 are electrically connected. An alignment film 9 made of polyimide is formed on the entire surface of the TFT 7 and the pixel electrode 8.

A liquid crystal material sealed between the substrates of a liquid crystal cell assembled while holding a space between the two transparent substrates with a spacer 11 interposed therebetween constitutes a liquid crystal layer 10. A polarizing plate is attached to the outer surfaces of the two substrates (not shown).

[0006] The liquid crystal display device configured as described above is
Displaying an image by switching the TFT 7, applying a video signal to the pixel electrode 8 to control the orientation of liquid crystal molecules contained in the liquid crystal layer 10, and modulating light transmitted through the colored layer 3. Can be.

FIG. 7 is a schematic sectional view of a conventional liquid crystal display device integrated with a driving circuit. Here, the driving circuit-integrated liquid crystal display element refers to a liquid crystal display element in which a driving circuit for driving a signal line or a scanning line connected to the switching element is incorporated on an array substrate provided with the switching element. .

The driving circuit integrated type liquid crystal display element comprises a display area X, a peripheral light shielding area Y, and a driving circuit section Z.
Since the driving circuit of the driving circuit portion Z is integrally formed on the array substrate 6 together with the formation in the display area X, the manufacturing cost can be reduced and the display device can be made more compact. it can.

[0009]

However, in the structure of the above-mentioned conventional liquid crystal display element, in order to prevent light from leaking from the peripheral portion of the display area X, a counter substrate facing the array substrate, that is, a color filter is used. Is provided on the periphery of the display area X on the substrate on which the light-shielding layer Y made of a metal such as chrome or a black resin is formed. As a result, the following problem occurs. Was.

That is, in the above-mentioned conventional liquid crystal display element, in a liquid crystal display element integrated with a drive circuit, a signal line drive for supplying various signals to signal lines or scanning lines is provided along the periphery of the array substrate. Although a circuit and a scanning line driving circuit are provided, when a metal such as chromium is used as a material of the light shielding layer on the opposite substrate, a parasitic capacitance is generated between the driving circuit and the light shielding layer. The speed is reduced or an abnormality occurs in the drive signal waveform, which causes a malfunction.

In any of the above-mentioned conventional liquid crystal display devices, when a black resin is used as the material of the light-shielding layer at the peripheral portion of the display region X, the thickness of the colored layer of the color filter and the peripheral portion of the display region X are reduced. And the thickness of the liquid crystal layer at the periphery of the display area X is different from the thickness of the liquid crystal layer at the center of the display area X, and the display quality is degraded. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to ensure uniformity of the thickness of a liquid crystal layer without affecting a driving circuit to cause a malfunction. Another object of the present invention is to provide a liquid crystal display device having a configuration in which light leakage from a peripheral portion of a display area is prevented.

[0013]

According to the liquid crystal display device of the present invention, a first transparent substrate, a common electrode formed on one main surface of the first transparent substrate, and a common electrode formed on the common electrode are formed. A first alignment film, a second transparent substrate, a switching element disposed at a predetermined position in a display area on one main surface of the second transparent substrate, and applying a signal to the switching element to drive the switching element. An electrode wiring formed in order to electrically connect to the switching element, a pixel electrode to which a voltage signal is applied via the switching element, a switching element and an electrode wiring,
A second alignment film formed to cover the pixel electrode, and a light-shielding auxiliary formed in a peripheral light-shielding region around a display region peripheral portion on one main surface of either the first transparent substrate or the second transparent substrate. A colored layer, and all or one of the portions of the first transparent substrate or the second transparent substrate on which the light-shielding auxiliary colored layer is formed on one main surface of one of the transparent substrates on which the light-shielding auxiliary colored layer is formed; An adhesive formed so as to bond the portion of the peripheral light-shielding region including the portion and the portion of the peripheral light-shielding region at the periphery of the display region on one main surface of the other transparent substrate, and the first transparent substrate and the first transparent substrate. On the other main surface of the first transparent substrate and on the other main surface of the second transparent substrate so as to cover the liquid crystal layer sealed between the second transparent substrate and the peripheral light-shielding region where the adhesive is formed. A first polarizing plate and a second polarizing plate respectively adhered to the first transparent substrate on one principal surface of the second transparent substrate Disposed in the peripheral light shielding region outside, a drive circuit for driving the switching element via the electrode wiring,
With this configuration, light leakage from the periphery of the display area is ensured while ensuring uniformity of the thickness of the liquid crystal layer without affecting the drive circuit, which may cause malfunction. This can provide a liquid crystal display device having a configuration in which the phenomenon is prevented.

If necessary, the light-shielding layer further includes one or more colored layers including a colored layer made of the same material as the light-shielding auxiliary colored layer, and a light-shielding layer. A color filter formed on the peripheral portion of the light-shielding layer, which is formed on a portion between one main surface of one of the transparent substrates and the light-shielding auxiliary coloring layer and is made of the same material as the light-shielding layer forming the color filter; It is good to have.

If the peripheral light-shielding layer is formed on the inner peripheral portion of the peripheral light-shielding region on one main surface of one of the transparent substrates, even if the peripheral light-shielding layer is formed of a metal material, the peripheral light-shielding layer is formed on the drive circuit. On the other hand, it is possible to provide a liquid crystal display device having a configuration in which light leakage from the periphery of the display area is prevented while ensuring the uniformity of the thickness of the liquid crystal layer without affecting the operation of the liquid crystal layer. .

According to another configuration of the liquid crystal display element of the present invention, the first transparent substrate, the common electrode formed on one main surface of the first transparent substrate, and the common electrode formed on the common electrode are formed. A first alignment film, a second transparent substrate, a switching element disposed at a predetermined position in a display area on one main surface of the second transparent substrate, and applying a signal to the switching element to drive the switching element. An electrode wiring formed in order to electrically connect to the switching element, a pixel electrode to which a voltage signal is applied via the switching element, a switching element and an electrode wiring,
A second alignment film formed to cover the pixel electrode, and formed on a part of a peripheral light-shielding region of a display region peripheral portion on one main surface of either the first transparent substrate or the second transparent substrate. Metal peripheral light-shielding layer, a metal peripheral light-shielding layer in a peripheral light-shielding region on one main surface of one of the first transparent substrate or the second transparent substrate on which the metal peripheral light-shielding layer is formed, A light-shielding auxiliary coloring layer formed so as to cover, a part of a peripheral light-shielding region including all or a part of a part on one main surface of the transparent substrate on which the light-shielding auxiliary coloring layer is formed, and the other transparent substrate An adhesive formed so as to bond a peripheral light-shielding region portion of a display region peripheral portion on one main surface, and a liquid crystal layer sealed between a first transparent substrate and a second transparent substrate. , On the other main surface of the first transparent substrate and on the second transparent substrate so as to cover the peripheral light-shielding region where the adhesive is formed. A first polarizing plate and a second polarizing plate attached to the other main surface of the substrate, respectively. With this configuration, the display is performed while ensuring the uniformity of the thickness of the liquid crystal layer. It is possible to provide a liquid crystal display device configured to prevent light leakage from the peripheral edge of the region.

If the metal peripheral light-shielding layer is formed on the inner peripheral portion of the peripheral light-shielding region on one main surface of one of the transparent substrates, the peripheral light-shielding region on one main surface of the second transparent substrate is provided. Even when a driving circuit for driving the switching element is integrally formed outside through the electrode wiring, the uniformity of the thickness of the liquid crystal layer can be obtained without affecting the driving circuit to cause a malfunction. It is possible to provide a liquid crystal display device having a configuration in which light leakage from the periphery of the display area is prevented while ensuring the above.

If necessary, the light-shielding auxiliary coloring layer may further comprise one or more coloring layers including a coloring layer made of the same material as the coloring layer, and a metal light-shielding layer made of the same material as the metal peripheral light-shielding layer. And a color filter formed in a display area on one main surface of one of the transparent substrates. Further, a drive circuit for driving a switching element via an electrode wiring may be further provided outside the peripheral light-shielding region on one main surface of the second transparent substrate.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a liquid crystal display device according to the present invention, a colored layer is also formed on a portion of a counter substrate on which a color filter is formed, which is to be a light-shielding region around the periphery of a display region. The liquid crystal cell is assembled by forming a sealing material (adhesive) on the coloring layer, and a polarizing plate is attached to the outside of the liquid crystal cell so as to cover the coloring layer and the sealing material forming region. is there. The region where the coloring layer, the sealing material, and the polarizing plate overlap functions as a light shielding layer.
The part of the peripheral light-shielding region of the counter substrate where the colored layer is formed may be all or part as necessary.

For example, when a metal such as chromium is used as the material of the light-shielding layer of the color filter, the above-described structure is provided in a portion facing the drive circuit on the array substrate in a portion to be a peripheral light-shielding region at the periphery of the display region. Apply to form a colored layer,
The portion where the coloring layer is formed is configured so that the coloring layer, the sealing material, and the polarizing plate overlap. By employing such a configuration, it is possible to prevent light leakage from the periphery of the display area without affecting the drive circuit, which may cause a malfunction. A portion of the peripheral light-shielding region around the periphery of the display region other than the portion facing the drive circuit on the array substrate is formed with a light-shielding layer made of a metal such as chrome similar to the material of the light-shielding layer of the color filter. Alternatively, the coloring layer, the sealing material, and the polarizing plate may be configured to overlap.

In the above configuration, it is not necessary to use black resin as the material of the light-shielding layer in the peripheral light-shielding region, so that the uniformity of the thickness of the liquid crystal layer at the periphery of the display region and at the center of the display region is ensured. Light leakage at the periphery of the display area can be prevented without lowering the display quality.

Hereinafter, embodiments of the liquid crystal display device according to the present invention will be described with reference to the drawings.

FIG. 1 is a sectional structural view of a liquid crystal display device according to a first embodiment of the present invention. The liquid crystal display device according to the first embodiment is manufactured and configured as follows.

On a transparent substrate 6 serving as an array substrate, TF
The TFT 7, the pixel electrode 8 electrically connected to the source electrode of the TFT 7, and the electrode wiring for driving the TFT are formed by repeating the film formation and patterning in the usual process of forming T. The TFTs 7 and the pixel electrodes 8 are formed for a total of 10,000 pixels, that is, 100 pixels in length and width, and the amorphous silicon TFT array substrate 6 is formed.

On the other hand, on a transparent substrate 1 serving as a counter substrate,
As described below, a color filter and a colored layer in a peripheral light-shielding region are formed.

First, a light shielding film 2 of a predetermined shape made of black resin is formed on a transparent substrate 1 by a method such as a photolithography method using a pigment resist or a dyeing method, a printing method, an electrodeposition method or the like.
Form on top. However, in the first embodiment, the light shielding film 2 is not formed in the peripheral light shielding region Y.

After forming a light-shielding film 2 on a transparent substrate 1, a UV-curable acrylic resin resist CR in which a red pigment is dispersed is used.
-2000 (trade name, Fuji Hunt Technology Co., Ltd.)
Is applied to the entire surface of the transparent substrate 1 by a spinner, and the resist is exposed by irradiating light having a wavelength of 365 nm with a light exposure of 100 mJ / cm2 through a photomask that irradiates the red colored portion with light. After exposure, potassium hydroxide (K
Developing for 10 seconds in a 1% aqueous solution of OH) and baking at a temperature of 230 ° C. for 1 hour to form a red colored layer 3R having a thickness of about 2.0 μm. Similarly, green and blue colored layers 3G,
3B is formed in a similar step. The material of the green coloring layer 3G is a UV-curable acrylic resin resist CG-2000 (trade name, manufactured by Fuji Hunt Technology Co., Ltd.) in which a green pigment is dispersed, and the material of the blue coloring layer 3B is a blue pigment dispersed therein. UV curable acrylic resin resist CB-20
00 (trade name, manufactured by Fuji Hunt Technology Co., Ltd.). FIG. 2 is a plan view showing a state in which a colored layer and a light shielding layer are formed on a transparent substrate constituting a liquid crystal display element according to the present invention.

In the first embodiment, when the red colored layer 3R is formed as described above, in addition to a predetermined colored pattern portion forming a color filter in the display area X,
The red coloring layer 3R is also formed in the peripheral light-shielding region Y using a mask that forms the red coloring layer 3R so as to cover almost the entire peripheral light-shielding region Y at the periphery of the display region.

After the color filter and the red colored layer 3R of the peripheral light-shielding region Y are formed as described above, an ITO film is formed to a thickness of 1500 angstroms by the sputtering method to form the transparent electrode 4, and the color filter substrate is formed. Let it be 1.

Thereafter, the alignment film material AL-105 is applied to both substrates.
1 (trade name, manufactured by Nippon Synthetic Rubber Co., Ltd.) are formed, and rubbing treatment is performed.

Further, an adhesive 12 made of a thermosetting resin ES-4000 (trade name, manufactured by Mitsui Toatsu Chemicals, Inc.) was applied to the red colored layer of the peripheral light shielding area Y as shown in FIG. It is formed so as to overlap on 3R.

Next, micropearls (trade name, manufactured by Sekisui Fine Chemical Co., Ltd.) having a diameter of 5 μm as spacers 1
The electrode transfer material (not shown) for applying a voltage from the active matrix substrate (TFT array substrate) 6 to the counter electrode 1 is spread over the entire surface of one of the substrates. (Not shown). Then, the substrates 1 and 6 are arranged so that the alignment film 5 and the alignment film 9 of each substrate face each other, and the respective rubbing directions make an angle of 90 degrees with each other, and the adhesive 12 is cured by heating, The substrate 1 and the substrate 6 are bonded. As a liquid crystal material, a material obtained by adding 0.1 wt% of S811 to ZLI-1565 (trade name, manufactured by E. Merck) is injected from an injection port of a liquid crystal cell assembled by bonding both substrates, After the injection, the injection port is sealed with an ultraviolet curable resin.

The polarizing plates 35 and 36 are used to cover the peripheral light-shielding region Y on which the adhesive 12 and the red coloring layer 3R are formed, and are attached on the outer surfaces of both substrates.

The color display type active matrix liquid crystal display device constructed as described above, that is, the OD of the peripheral light shielding region Y of the liquid crystal display device according to the first embodiment of the present invention.
When the (Optical Density) value was measured, the value was 3.
The light leakage from the peripheral light-shielding region Y was very small, and the contrast ratio of the displayed image was high, and high display quality was obtained. The method for forming the colored layer is not limited to the photolithography method of the pigment resist, and any other method such as a dyeing method, a printing method, and an electrodeposition method may be used.

FIG. 3 is a sectional structural view of a liquid crystal display device according to a second embodiment of the present invention.

The structure of the liquid crystal display device according to the second embodiment is almost the same as that of the liquid crystal display device according to the first embodiment, except for the following points. That is, the light shielding layer 2 ′
Is formed by photo-etching a chromium film coated on the transparent substrate 1 into a predetermined shape by a sputtering method.
Are formed in the inner peripheral portion along the display region X, but are not formed in the outer peripheral portion in the peripheral light shielding region Y. Then, a red colored layer 3R is formed on the outer peripheral portion of the peripheral light-shielding region Y.
Is formed, and the peripheral light-shielding region Y in the first embodiment is formed.
Similarly to the above, the adhesive 12, the red coloring layer 3 </ b> R, and the polarizing plates 35 and 36 are configured to overlap.

When the OD value of the peripheral light-shielding region Y of the liquid crystal display element according to the second embodiment of the present invention was measured, the value was 3.5, which was similar to that of the first embodiment. Light leakage from the region Y was very small, and the contrast ratio of the displayed image was high, and high display quality was obtained.

The liquid crystal display device according to the third embodiment of the present invention is different from the liquid crystal display device according to the first or second embodiment in that the peripheral light shielding shown in FIGS. The red coloring layer 3R formed in the region Y is replaced with the blue coloring layer 3B, and the other portions are configured in the same manner as the liquid crystal display device according to the first or second embodiment.

A liquid crystal display device according to the third embodiment of the present invention was manufactured, and when the OD value of the peripheral light-shielding region Y was measured, the value was 4.3. Light leakage from the peripheral light-shielding region Y was further reduced as compared with the liquid crystal display element according to the embodiment, and higher quality display could be performed.

FIG. 4 is a sectional structural view of a liquid crystal display device according to a fourth embodiment of the present invention. The fourth shown in FIG.
The liquid crystal display device according to the embodiment is a drive circuit integrated type liquid crystal display device, and is manufactured and configured as follows.

On a transparent substrate 6 serving as an array substrate, silicon nitride,
An insulating undercoat film 13 made of a material such as silicon oxide is formed. A first amorphous silicon layer (light-shielding layer) 14 is formed on the undercoat film 13 by a plasma CVD method. Hydrogen in the first amorphous silicon layer (light-shielding layer) 14 is reduced by a heating step after formation. An insulating layer 15 made of silicon nitride is formed on the first amorphous silicon layer (light shielding layer) 14, and a second amorphous silicon layer formed thereon by a plasma CVD method is subjected to a dehydrogenation step. And a subsequent annealing step using an excimer laser, thereby forming a polysilicon layer 16. The polysilicon film 16 is patterned by a photo-etching process, and the channel layers 19 and 20 of the active elements (circuit TFTs) 17 and 18 in the drive circuit area, and the switching elements 21 of the pixels in the display area.
Channel layer 22, the lower electrode 23 of the auxiliary capacitance electrode of each pixel, and the like. On the polysilicon film 16, a silicon oxide layer 24 "to be an auxiliary capacitance insulating film 24 'is formed by a normal pressure CVD method, and a part of the silicon oxide layer 24" is formed as a gate insulating film 24. Has become. The silicon oxide layer 24 ″ is a dense film with few defects due to a high-temperature heating step.

On the gate insulating film 24, a first molybdenum-tungsten (MoW) thin film 25 formed by a sputtering method and patterned by a photo-etching process is formed. The first molybdenum / tungsten thin film 25 is used as a mask at the time of impurity implantation by ion doping for forming the n-type TFTs 17 and 21 and the lower electrode 23 forming an auxiliary capacitance.
On the first molybdenum / tungsten thin film 25, a second molybdenum / tungsten thin film 26 formed by a sputtering method and patterned by a photo etching process is formed. The second molybdenum / tungsten thin film 26 is used as a mask when implanting impurities for forming the p-type TFT 18 in the drive circuit region.
First and second molybdenum / tungsten thin films 25 and 26
Are used again as a mask for impurity implantation and then patterned again to form the gate electrode of each TFT, various wirings in the drive circuit, the upper electrode 27 of the auxiliary capacitance electrode, and the auxiliary capacitance line. n-type polysilicon LDD (Lightly
Doped drain region 28 includes first and second molybdenum
This is formed by impurity implantation performed after patterning of the tungsten thin films 25 and 26 and activation of the implanted impurities by annealing the substrate in a high temperature process.

The first interlayer insulating film 2 is formed on the silicon oxide layer 24 ″ and the second molybdenum / tungsten thin film 26.
A silicon oxide layer 9 is formed by a normal pressure CVD method. An aluminum thin film is formed by a sputtering method in a contact hole portion formed by a subsequent processing for the first interlayer insulating film 29, and the aluminum thin film is patterned by a photo-etching process to form a source electrode 30 and a drain electrode 31 of the TFT. , Signal lines, and various wirings such as a power supply voltage wiring 32 and a ground voltage wiring 33 in the drive circuit area. On the first interlayer insulating film 29 on which the various wirings are formed, a silicon nitride layer serving as a second interlayer insulating film 34 is formed by a plasma CVD method. A contact hole has been opened by subsequent processing. On the second interlayer insulating film 34, a pixel electrode 8 obtained by patterning an ITO film, which is a transparent electrode formed by a sputtering method, is provided. The pixel electrode 8 is electrically connected to the source electrode 30 at a contact hole portion of the second interlayer insulating film 34. Then, an alignment film 9 made of polyimide is formed as an uppermost layer on the transparent substrate 6.

On the other hand, on the transparent substrate 1 serving as the opposite substrate,
As described below, a color filter and a colored layer in a peripheral light-shielding region are formed.

First, a light-shielding film 2 of a predetermined shape made of black resin is formed on a transparent substrate 1 by a method such as photolithography or dyeing using a pigment resist, printing, or electrodeposition.
Form on top. However, in the fourth embodiment, the light-shielding film 2 is formed not only on a predetermined portion of the display area X but also on the inner peripheral portion along the display area X in the peripheral light-shielding area Y. It is not formed on the outer peripheral portion of the region Y.

After forming the light-shielding film 2 on the transparent substrate 1, an ultraviolet-curing acrylic resin resist CR in which a red pigment is dispersed is used.
-2000 (trade name, Fuji Hunt Technology Co., Ltd.)
Is applied to the entire surface of the transparent substrate 1 by a spinner, and the resist is exposed by irradiating light having a wavelength of 365 nm with a light exposure of 100 mJ / cm2 through a photomask that irradiates the red colored portion with light. After exposure, potassium hydroxide (K
Developing for 10 seconds in a 1% aqueous solution of OH) and baking at a temperature of 230 ° C. for 1 hour to form a red colored layer 3R having a thickness of about 2.0 μm. Similarly, green and blue colored layers 3G,
3B is formed in a similar step. The material of the green coloring layer 3G is a UV-curable acrylic resin resist CG-2000 (trade name, manufactured by Fuji Hunt Technology Co., Ltd.) in which a green pigment is dispersed, and the material of the blue coloring layer 3B is a blue pigment dispersed therein. UV curable acrylic resin resist CB-20
00 (trade name, manufactured by Fuji Hunt Technology Co., Ltd.). In the fourth embodiment, when the blue colored layer 3B is formed as described above, in addition to the predetermined colored pattern portion forming the color filter in the display area X, the peripheral light shielding area around the display area peripheral part in FIG. A blue colored layer 3B is also formed in the peripheral light-shielding region Y using a mask that forms the blue colored layer 3B so that almost all of Y is covered.

After the color filter and the red colored layer 3R of the peripheral light-shielding region Y are formed as described above, an ITO film is formed to a thickness of 1500 angstroms by the sputtering method to form the common electrode 4 which is a transparent electrode. , A color filter substrate 1.

Thereafter, the alignment film material AL-105 is applied to both substrates.
1 (trade name, manufactured by Nippon Synthetic Rubber Co., Ltd.) are formed, and rubbing treatment is performed.

Further, an adhesive 12 made of a thermosetting resin ES-4000 (trade name, manufactured by Mitsui Toatsu Chemicals, Inc.) was applied to the red colored layer of the peripheral light shielding area Y as shown in FIG. It is formed so as to overlap on 3R.

Next, micropearl (trade name, manufactured by Sekisui Fine Chemical Co., Ltd.) having a diameter of 5 μm was used as a spacer.
The electrode transfer material (not shown) for applying a voltage from the active matrix substrate (TFT array substrate) 6 to the counter electrode 1 is spread over the entire surface of one of the substrates. (Not shown). Then, the substrates 1 and 6 are arranged so that the alignment film 5 and the alignment film 9 of each substrate face each other, and the respective rubbing directions make an angle of 90 degrees with each other, and the adhesive 12 is cured by heating, The substrate 1 and the substrate 6 are bonded. As a liquid crystal material, a material obtained by adding 0.1 wt% of S811 to ZLI-1565 (trade name, manufactured by E. Merck) is injected from an injection port of a liquid crystal cell assembled by bonding both substrates, After the injection, the injection port is sealed with an ultraviolet curable resin.

The polarizing plates 35 and 36 are used to cover the peripheral light-shielding region Y on which the adhesive 12 and the red coloring layer 3R are formed, and are attached on the outer surfaces of both substrates. In the drive circuit integrated type liquid crystal display element according to the fourth embodiment configured as described above, the TFTs 17 and 18 and the wirings 32 and 33 of the drive circuit portion Z are the same as the TFT 21 and the wiring 30 of the display region portion X. 31 and the like. The upper electrode 27 of the auxiliary capacitance electrode and the auxiliary capacitance line are connected to the gate electrode 2.
5 and 26 are formed in the same process as a part of the metal thin film layer, and are connected to the power supply voltage wiring 32 of the drive circuit unit Z via through holes formed in the first interlayer insulating film 29. .

With respect to the liquid crystal display device according to the fourth embodiment of the present invention, when the OD value of the peripheral light-shielding region Y was measured, the value was 4.3, and light leakage from the peripheral light-shielding region Y was extremely small. In addition, a very high-quality display could be performed without being affected by the drive circuit integrally formed on the array substrate from the formation of the peripheral light-shielding region Y, which would cause a malfunction.

FIG. 5 is a sectional structural view of a liquid crystal display device according to a fifth embodiment of the present invention. The fifth shown in FIG.
The liquid crystal display element according to the fourth embodiment is a drive circuit-integrated liquid crystal display element like the liquid crystal display element according to the fourth embodiment.

The structure of the liquid crystal display device according to the fifth embodiment is almost the same as that of the liquid crystal display device according to the fourth embodiment, except for the following points. That is, the light shielding layer 2 ′
Is formed by photo-etching a chromium film coated on the transparent substrate 1 into a predetermined shape by a sputtering method.
Are formed in the inner peripheral portion along the display region X, but are not formed in the outer peripheral portion in the peripheral light shielding region Y. Then, the blue colored layer 3B is formed on the outer peripheral portion of the peripheral light-shielding region Y.
Are formed, and the peripheral light-shielding region Y in the fourth embodiment is formed.
Similarly to the above, the adhesive 12, the blue colored layer 3 </ b> B, and the polarizing plates 35 and 36 are configured to overlap.

With respect to the liquid crystal display device according to the fifth embodiment of the present invention, when the OD value of the peripheral light-shielding region Y was measured, the value was 4.3, and the liquid crystal display device according to the fourth embodiment was measured. Like the element, light leakage from the peripheral light-shielding region Y is extremely small, and the drive circuit integrally formed on the array substrate is not affected by the formation of the peripheral light-shielding region Y to cause a malfunction. , Very high quality display could be done.

[0056]

According to the liquid crystal display device of the present invention, a colored layer is also formed on a portion of the opposing substrate on which a color filter is formed, which is to be a light-shielding region around the periphery of the display region, where the color filter is formed. A liquid crystal cell is assembled by forming a sealing material (adhesive) on the coloring layer, and a polarizing plate is attached to the outside of the liquid crystal cell so as to cover the coloring layer and the sealing material forming region. The region where the sealing material and the polarizing plate overlap with each other functions as a light-shielding layer, and there is no need to use a black resin as a material of the light-shielding layer in the peripheral light-shielding region. Uniformity is ensured, and light leakage at the periphery of the display area can be prevented without deteriorating display quality.

In the case where the above configuration is applied to a liquid crystal display element having a drive circuit for driving a switching element via an electrode wiring outside the peripheral light-shielding area of the array substrate, when the liquid crystal display element is driven, Because a colored layer is formed without forming a metal light-shielding film on the part that may have an effect on the circuit that may cause malfunction, the malfunction of the drive circuit may be caused. Thus, it is possible to provide a liquid crystal display device having a configuration in which light leakage from the periphery of the display region is prevented while ensuring the uniformity of the thickness of the liquid crystal layer without any influence.

[Brief description of the drawings]

FIG. 1 is a sectional structural view of a liquid crystal display device according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a state in which a coloring layer and a light shielding layer are formed on a transparent substrate constituting the liquid crystal display element according to the present invention.

FIG. 3 is a sectional structural view of a liquid crystal display device according to a second embodiment of the present invention.

FIG. 4 is a sectional structural view of a liquid crystal display device according to a fourth embodiment of the present invention.

FIG. 5 is a sectional structural view of a liquid crystal display device according to a fifth embodiment of the present invention.

FIG. 6 is a schematic sectional structural view of a conventional active matrix type liquid crystal display element.

FIG. 7 is a schematic cross-sectional structural view of a conventional driving circuit-integrated liquid crystal display element.

[Explanation of symbols]

1, 6 transparent substrate 2 light-shielding layer (resin) 2 'light-shielding layer (chrome) 3 coloring layer 4 common electrode (transparent electrode) 5, 9 alignment film 7 TFT 8 pixel electrode (transparent electrode) 10 liquid crystal material 11 spacer 12 sealant Reference Signs List 13 undercoat film 14 light shielding layer (first amorphous silicon layer) 15 insulating film (silicon nitride layer) 16 polysilicon active layer 17 circuit TFT (n-type TFT) 18 circuit TFT (p-type TFT) 19 channel region (n-type) 20 channel region (p-type polysilicon region) 21 pixel TFT 22 channel region (n-type polysilicon region) 23 lower electrode of auxiliary capacitance electrode (n-type polysilicon region) 24 gate insulating film 24 ′ of auxiliary capacitance Insulating film 24 ″ silicon oxide layer 25 gate electrode (first molybdenum / tungsten thin film) 26 gate electrode (Second molybdenum-tungsten thin film) 27 Upper electrode of auxiliary capacitance electrode (n-type polysilicon region) 28 Lightly doped n-type polysilicon region 29 First interlayer insulating film (silicon oxide layer) 30 Source electrode (aluminum thin film) Reference Signs List 31 drain electrode (aluminum thin film) 32 power supply voltage wiring 33 ground voltage wiring 34 second interlayer insulating film (silicon nitride layer) 35, 36 polarizing plate X display area Y peripheral light shielding area Z drive circuit section

Continued on the front page (51) Int.Cl. ⁶ Identification code FI G09F 9/35 321 G09F 9/35 321

Claims (7)

[Claims] A first transparent substrate; a common electrode formed on one main surface of the first transparent substrate; a first alignment film formed on the common electrode; A substrate, a switching element disposed at a predetermined position in a display area on one main surface of the second transparent substrate, an electrode wiring formed for applying a signal to the switching element and driving the switching element, A pixel electrode electrically connected to a switching element, to which a voltage signal is applied via the switching element; a second alignment film formed to cover the switching element and the electrode wiring; and the pixel electrode; A light-shielding auxiliary coloring layer formed in a peripheral light-shielding region of a peripheral edge portion of a display region on the one main surface of either the first transparent substrate or the second transparent substrate, and the first transparent substrate or the first Of the two transparent substrates, A part of the peripheral light-shielding region including all or a part of the part on which the light-shielding auxiliary coloring layer is formed on the one main surface of one of the transparent substrates on which the coloring layer is formed, and the other transparent substrate An adhesive formed so as to bond a peripheral light-shielding region portion of a display region peripheral portion on the one main surface, and sealed between the first transparent substrate and the second transparent substrate. A liquid crystal layer, and the second transparent substrate and the second transparent substrate, each of which is attached to the other main surface of the second transparent substrate so as to cover up to the peripheral light-shielding region where the adhesive is formed. A first polarizing plate and a second polarizing plate, and a driving circuit disposed outside the peripheral light-shielding region on the one main surface of the second transparent substrate and driving the switching element via the electrode wiring; A liquid crystal display device comprising: 2. The liquid crystal display device according to claim 1, wherein
Further, the light-shielding auxiliary coloring layer includes at least one colored layer including a colored layer made of the same material as the colored layer and a light-shielding layer, and is formed in the display region on the one main surface of the one transparent substrate. And a peripheral light-shielding layer formed on a portion between the one main surface of the one transparent substrate and the light-shielding auxiliary coloring layer, and made of the same material as the light-shielding layer constituting the color filter. And a liquid crystal display element. 3. The liquid crystal display element according to claim 2, wherein the peripheral light-shielding layer is formed on an inner peripheral portion of the peripheral light-shielding region on the one main surface of the one transparent substrate. A liquid crystal display device, comprising: 4. A first transparent substrate; a common electrode formed on one main surface of the first transparent substrate; a first alignment film formed on the common electrode; A substrate, a switching element disposed at a predetermined position in a display area on one main surface of the second transparent substrate, an electrode wiring formed for applying a signal to the switching element and driving the switching element, A pixel electrode electrically connected to a switching element, to which a voltage signal is applied via the switching element; a second alignment film formed to cover the switching element and the electrode wiring; and the pixel electrode; A metal peripheral light-shielding layer formed on a part of a peripheral light-shielding region at a periphery of a display area on the one main surface of either the first transparent substrate or the second transparent substrate; and the first transparent substrate. Or the second transparent substrate out of the In the peripheral light-shielding region on the one main surface of the one transparent substrate on which the metal peripheral light-shielding layer is formed, a light-shielding auxiliary coloring layer formed so as to cover the metal peripheral light-shielding layer, A portion of the peripheral light-shielding region including all or a part of the portion on the one main surface of the transparent substrate on which the light-shielding auxiliary colored layer is formed, and a periphery of a display region on the one main surface of the other transparent substrate An adhesive formed so as to bond a part of the peripheral light-shielding region of the portion, a liquid crystal layer sealed between the first transparent substrate and the second transparent substrate, and the adhesive is formed. A first polarizing plate and a second polarizing plate attached to the other main surface of the first transparent substrate and the other main surface of the second transparent substrate, respectively, so as to cover the peripheral light-shielding region. And a liquid crystal display element comprising: 5. The liquid crystal display element according to claim 4, wherein the metal peripheral light-shielding layer is formed on an inner peripheral portion of the peripheral light-shielding region on the one main surface of the one transparent substrate. A liquid crystal display element characterized by the above. 6. The liquid crystal display element according to claim 4, further comprising at least one colored layer including a colored layer made of the same material as the light-shielding auxiliary colored layer, and the metal peripheral light-shielding. A liquid crystal display element comprising: a layer; and a metal light-shielding layer made of the same material, and a color filter formed in the display area on the one main surface of the one transparent substrate. 7. The switching element according to claim 4, wherein the switching element is provided outside the peripheral light-shielding region on the one main surface of the second transparent substrate via the electrode wiring. A liquid crystal display device further comprising a drive circuit for driving the liquid crystal display.