JPH1062768A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shield the light of peripheral regions without providing the device with black matrices by providing the parts corresponding to the peripheral regions of a color filter substrate with light shielding layers which consist of colored layer of a single layer or are formed by laminating the two different colored layers. SOLUTION: The parts where pixel electrodes and counter electrodes face each other are display regions and the outer peripheral parts thereof are the peripheral regions. The active matrix substrate is provided with gate signal lines 3 as scanning wirings and source signal lines 5 as signal wirings so as to intersect with each other past the neighborhood of the respective pixel electrodes in a plain view. Further, both signal lines 3, 5 are formed to extend beyond the peripheral regions. Scanning voltages are inputted on the gate signal lines 3 via input terminals formed in the terminal regions on the outer side thereof and signal voltages are inputted on the source signal lines 5. In such a case, the parts corresponding to the peripheral regions of the color filter substrate have the light shielding layers which consist of the colored layer of the single layer or are formed by laminating the two different colored layers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device used as a display device of, for example, a television set, a personal computer, a word processor, an office automation (OA) device, and the like.

[0002]

2. Description of the Related Art FIG. 15 shows an example of an active matrix substrate constituting a liquid crystal display device.

In this active matrix substrate, thin film transistors (hereinafter, referred to as TFTs) 2 as switching elements and pixel capacitors 1 are formed in a matrix. A gate signal line 3 is connected to the gate electrode of the TFT 2, and the TFT 2 is driven by a signal input thereto. A source signal line 5 is connected to a source electrode of the TFT 2, from which a video signal or the like is input as a display signal. Each gate signal line 3 and each source signal line 5 are formed to cross each other. The pixel electrode and one terminal of the pixel capacitor 1 are connected to the drain electrode of the TFT 2. A pixel capacitance line 4 is connected to the other terminal of each pixel capacitance 1. This active matrix substrate is bonded to a counter substrate on which a counter electrode is formed,
A liquid crystal layer is sandwiched between the two substrates to form a liquid crystal display device. At this time, the pixel capacitance wiring 4 is connected to a counter electrode on a counter substrate.

In the liquid crystal display device having such a configuration,
In order to realize a color display, R (R
ed), G (Green), and B (Blue) are most commonly used to form a color filter having three color layers. Such a counter substrate provided with a color filter is called a color filter substrate. Generally, a black matrix for preventing color mixing and light leakage is formed on the color filter substrate.

FIG. 16 shows a configuration of a conventional liquid crystal display device in which a black matrix is formed on a color filter substrate. In this liquid crystal display device, a pixel electrode (not shown) is provided in a display area of the active matrix substrate,
A gate signal line and a source signal line are provided crossing each other through the vicinity thereof. Both signal lines are formed to extend beyond a peripheral region outside the display region, and a scanning voltage is input to a gate signal line via an input terminal provided in a terminal region outside the display region, and a signal voltage is applied to a source signal line. Is entered. On the other hand, a color filter (not shown) is provided in the display area of the color filter substrate so as to face the pixel electrode.
Then, a black matrix is formed in the peripheral area where the color filter is not provided, and the peripheral area is shielded from light.

[0006]

As described above, a conventional liquid crystal display device generally has a structure in which a black matrix is provided on a color filter substrate. However, in order to reduce the manufacturing cost of the liquid crystal display device, a configuration in which a black matrix is not provided on the color filter substrate can be naturally considered. In this case, a problem is how to shield the peripheral area. For example, if backlight light leaks from the peripheral area, display quality is impaired, and this is a particular problem in the case of black display. Therefore, it is necessary to shield the backlight light. Usually, an observer views the liquid crystal display device from the color filter substrate side. At this time, if a sealing resin or the like provided in a peripheral region for bonding the two substrates is visible, display quality is impaired. It is desirable to make them invisible.

The present invention has been made to solve such problems of the prior art, and has as its object to provide a liquid crystal display device capable of shielding a peripheral region from light without providing a black matrix on a color filter substrate. Aim.

[0008]

According to a liquid crystal display device of the present invention, an active matrix substrate and a color filter substrate are arranged opposite to each other with a liquid crystal layer interposed therebetween, and a pixel electrode provided on the active matrix substrate and a color filter substrate are provided. In a liquid crystal display device in which a portion facing the opposing electrode is a display region, and an outer peripheral portion of the display region is a peripheral region, the active matrix substrate has scanning lines crossing each other through the vicinity of the periphery of each pixel electrode. And the signal wiring are formed so as to extend beyond the peripheral region, and the color filter substrate has a color filter in a portion corresponding to the display region and a portion corresponding to the peripheral region. And a light-shielding layer composed of a single colored layer or a laminate of two colored layers of different colors. Serial object is achieved.

In a portion corresponding to the peripheral region of the active matrix substrate, a second light-shielding layer covers at least a space between at least one adjacent one of the scanning wiring and the signal wiring, and is covered. The pattern may be formed simultaneously with the wiring on the different side using the same material as the wiring on the different side from the wiring.

The second light-shielding layer is provided so as to be spaced apart from the scanning wiring and the signal wiring at the outermost periphery of the display area, and the light-shielding layer made of a colored layer is provided so as to cover the separated part. It may be.

An insulating film covering the scanning wiring and the signal wiring is provided on the active matrix substrate, and a second light-shielding layer is provided at a portion corresponding to the peripheral region of the active matrix substrate, and the scanning wiring and the signal wiring are provided. At least one of the two or more ranges,
In addition, the insulating film may be provided between the wiring and the wiring to be covered.

The light-shielding layer formed by laminating the two colored layers of different colors may be a laminated layer of a red colored layer and a blue colored layer.

[0013] The single light-blocking layer provided on the color filter substrate may be formed so that a color filter formed in the display area is extended.

The single-layer light-shielding layer provided on the color filter substrate may have a pattern formed to have a smaller width than the color layer of the color filter formed in the display area.

Hereinafter, the operation of the present invention will be described.

In the present invention, the peripheral region is shielded from light by the light-shielding layer provided in a portion corresponding to the peripheral region of the color filter substrate. This light-shielding layer may be a single colored layer,
Two different colored layers may be laminated.
In the case of a single layer, the inspection of the sealing resin provided in the peripheral region can be easily performed, and the occurrence of poor alignment can be suppressed.
When the single light-shielding layer is configured so that a plurality of color layers are mixed, it is possible to prevent light from being colored by the light-shielding layer.

Further, when a second light-shielding layer is provided in a peripheral area of the active matrix substrate so as to cover at least a portion between adjacent wirings of at least one of the scanning wiring and the signal wiring, the light transmittance of the peripheral area is reduced. It will be even lower.

The second light-shielding layer can be formed simultaneously with the signal wiring or the scanning wiring, and does not complicate the manufacturing process. In this case, since the outermost one of the scanning wiring and the signal wiring in the display area and the second light-shielding layer are in the same layer, they are separated from each other at the boundary between the display area and the peripheral area. If a light-shielding layer made of the colored layer is provided so as to cover the separated portion, light leakage from this portion can also be prevented.

The second light shielding layer may be provided via an insulating film covering the scanning wiring and the signal wiring. For example, in the case of a POP structure described later, when a second light-blocking layer is provided on an interlayer insulating film or the like having a large thickness, the capacitance between the second light-blocking layer and each wiring can be reduced. In addition, when the second light-blocking layer is provided so as to cover a range that covers at least one of the scanning wiring and the signal wiring, the wiring pattern can be prevented from being visually recognized as a pattern.

As the light-shielding layer formed by laminating the two different colored layers, two layers of the R, B, and G color layers of the color filter can be used. At this time, when a layer in which a red coloring layer and a blue coloring layer having the same color as the color layer of the color filter are laminated as the light shielding layer is used, for example, green and blue colors which are the same color as the color layer of the color filter are used. The light transmittance of the peripheral region can be minimized as compared with the case where the coloring layers are stacked or the case where the red and green coloring layers are stacked. Note that the light-blocking layer in which two different coloring layers are stacked may have a structure in which two coloring layers that absorb light in a wavelength region different from the color layer of the color filter are stacked. Further, as the light shielding layer, two different
Not only a single colored layer is laminated, but also a single colored layer composed of one or more color layers of a color filter or a single colored layer that absorbs light in a wavelength region different from the color layer of the color filter. You may.

[0021]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a plan view of a liquid crystal display device of Embodiment 1.

In this liquid crystal display device, an active matrix substrate provided with a pixel electrode (not shown) and a color filter substrate provided with a counter electrode (not shown) face each other with a liquid crystal layer (not shown) interposed therebetween. Are located. The opposing portion between the pixel electrode and the opposing electrode is a display region, and the outer peripheral portion is a peripheral region.

The active matrix substrate is provided with a gate signal line 3 as a scanning line and a source signal line 5 as a signal line so as to pass through the vicinity of each pixel electrode and cross each other in plan view. Both signal lines 3, 5
Are formed so as to extend beyond the peripheral region, and a scanning voltage is input to the gate signal line 3 and a signal voltage is input to the source signal line 5 via input terminals provided in a terminal region outside the peripheral region.

FIG. 2 is a sectional view of the TFT portion of the active matrix substrate.

In this active matrix substrate, a gate electrode 12 connected to a gate signal line 3 is formed on a transparent insulating substrate 11, and a gate insulating film 13
Are formed. A semiconductor layer 14 is formed thereon so as to overlap with the gate electrode 12, and a channel protection layer 15 is formed on a central portion thereof. Channel protective layer 15
A source electrode 16a and a drain electrode 16b, both of which are made of an n ⁺ -Si layer, are formed so as to cover the ends of the semiconductor layer 14 and a part of the semiconductor layer 14 and are divided on the channel protective layer 15.

The source signal line 5 having a two-layer structure is connected to the source electrode 16a. This source signal line 5
It comprises a transparent conductive layer 17a and a metal layer 10a. A transparent conductive layer 17b and a metal layer 10b are formed on the drain electrode 16b.
Are formed, and the transparent conductive layer 17b serves as a connection electrode for connecting the pixel electrode 19 and the drain electrode 16b. Further, an interlayer insulating film 18 is formed to cover the TFT, the gate signal line, and the source signal line. The pixel electrode 1 made of a transparent conductive layer is formed on the interlayer insulating film 18.
9 is formed, and is connected to the drain electrode 16b of the TFT via a transparent conductive layer 17b as a connection electrode via a contact hole (not shown in the figure) penetrating the interlayer insulating film 18 in a part other than the figure. This contact hole will be described later.

FIG. 3 is a cross-sectional view showing a state in which a color filter substrate is disposed so as to face the active matrix substrate thus configured with a liquid crystal layer LC interposed therebetween. In this color filter substrate, a color filter 31 is provided in a display region of a transparent insulating substrate 30 serving as a base, and any one of R, G, and B color layers is arranged according to a display color of each pixel. . Further, in the peripheral region of the color filter substrate, there is provided a light-shielding layer 32 in which two colored layers of different colors, for example, red and blue colored layers are stacked in the illustrated example. A sealing material 3 made of a sealing resin or the like for bonding the active matrix substrate and the color filter substrate is provided on the light shielding layer 32.
3 are provided.

This liquid crystal display device can be manufactured as follows.

First, in order to manufacture an active matrix substrate, a gate signal line and a gate electrode 12 are formed on a transparent insulating substrate 11. As the transparent insulating substrate, a glass substrate or the like can be used. Further, an anodic oxide film may be formed on the surfaces of the gate signal line 3 and the gate electrode 12.

Next, the gate insulating film 13, the semiconductor layer 14,
Then, a channel protection layer 15 is formed in order, and then a source electrode 16a and a drain electrode 16b are formed. The transparent conductive layers 17a and 17b made of ITO and the metal layers 10a and 10b are sequentially formed thereon by sputtering and patterned to obtain the source signal lines 5 and the connection electrodes having a two-layer structure. The manufacturing process up to this point has been conventionally known.

Thereafter, a photosensitive acrylic resin is formed as an interlayer insulating film 18 to a thickness of 3 μm by spin coating to form a contact hole. Thereafter, a transparent conductive layer to be a pixel electrode is formed by a sputtering method and patterned, whereby a pixel electrode 19 is obtained. This pixel electrode 1
Reference numeral 9 is connected to the transparent conductive layer 17b connected to the drain electrode 16b of the TFT via a contact hole penetrating the interlayer insulating film 18. That is, this pixel electrode 19
Are formed in a so-called POP structure.

Next, in order to produce a color filter substrate, a color layer and a light shielding layer of a color filter 31 are formed on the transparent insulating substrate 30 by patterning. At this time, R, B, and G were sequentially arranged in the color layer of the color filter 31 according to the color arrangement of each pixel, and two of them were sequentially laminated as two colored layers of different colors in the light shielding layer 32 portion. A transparent conductive layer was formed thereon to form a counter electrode. Either the manufacturing process of the active matrix substrate or the manufacturing process of the color filter substrate may be performed first.

Thereafter, an alignment film (not shown) is formed on the surfaces of the active matrix substrate and the color filter substrate, and both substrates are bonded with a seal resin or the like. Finally, a liquid crystal is injected into a gap between the two substrates to obtain a liquid crystal display device.

In the thus-obtained liquid crystal display device of the present embodiment, since two colored layers of different colors are laminated as the light shielding layer 32, the peripheral area can be shielded from light. Therefore, the backlight did not leak from the peripheral region, and the sealing resin and the like provided in the peripheral region were not seen. In particular, when a layer in which a red coloring layer and a blue coloring layer were laminated was used as the light-shielding layer, the light transmittance in the peripheral region could be reduced to about 1%. In this case, as a matter of course, the light transmittance in the peripheral region is lower than the configuration in which the light-shielding layer is not formed or the configuration in which the single-color light-shielding layer is provided. The light transmittance was the lowest as compared with the case where it was used. Further, since the light-shielding layer can be sequentially laminated at the time of forming the pattern of each color layer of the color filter, the manufacturing process can be simplified.

(Embodiment 2) FIGS. 4A and 4
FIG. 5B is a plan view of an active matrix substrate in the liquid crystal display device of Embodiment 2, and FIG.
FIG. 5A is a cross-sectional view taken along the line AA ′ of FIG.
FIG. 14 is a sectional view taken along the line B-B '. 4 (A) and FIG.
4A shows a gate signal line portion in a peripheral region, and FIG.
5B and FIG. 5B show a source signal line portion in a peripheral region.

In this active matrix substrate, a second light-shielding layer 20a is formed in the peripheral region so as to cover between adjacent ones of the gate signal lines 3, and the source signal lines 5
Prior to forming the second light-shielding layer 20a, a second light-shielding layer 20b was formed simultaneously with the second light-shielding layer 20a so as to cover a space between adjacent ones of the source signal lines 5. On the other hand, in the color filter substrate, similarly to the liquid crystal display device of the first embodiment, two different colored layers as light shielding layers were laminated in a peripheral region on the color filter substrate.

The liquid crystal display of the second embodiment has the following advantages as compared with the liquid crystal display of the first embodiment. That is, in the liquid crystal display device of the first embodiment, the light transmittance of the peripheral region is about 1%, and the wiring of the active matrix substrate can be seen through. For this reason, it cannot be used for, for example, a personal computer that requires particularly high display quality. On the other hand, in the liquid crystal display device of the second embodiment, the light transmittance in the peripheral region can be further reduced by the second light shielding layers 20a and 20b provided on the active matrix substrate. Can be used.

The liquid crystal display of the second embodiment also has the following advantages. That is, the second light-shielding layer 20a provided in the portion where the gate signal line 3 is formed can be simultaneously patterned using the same material as the source signal line, and the second light-shielding layer 20a provided in the portion where the source signal line 5 is formed The layer 20b can be simultaneously patterned using the same material as the gate signal line. The second light-shielding layer 20a and the source signal line can be formed as separate layers, or the second light-shielding layer 20b and the gate signal line can be formed as separate layers. Is advantageous in terms of cost since the number of manufacturing steps does not increase. When the second light-shielding layer 20b and the gate signal line are formed as separate layers, the source signal line 5 can be formed on the substrate side with respect to the second light-shielding layer 20b.

Further, in the liquid crystal display device of the second embodiment,
There are also the following advantages. That is, when the second light-shielding layer 20a provided in the portion where the gate signal line 3 is formed is formed in the same layer as the source signal line, interference in a layer above the source signal line is different from interference in a layer above the gate signal line. There is a problem that a pattern corresponding to the wiring can be seen in the peripheral area. The same problem occurs when the second light-shielding layer 20b provided in the portion where the source signal line 5 is formed is formed in the same layer as the gate signal line. Further, there is a problem that a sealing resin for bonding the active matrix substrate and the color filter substrate, a conductive paste for inputting a signal to the counter electrode, and the like are provided in the peripheral region, and they can be seen. On the other hand, in the liquid crystal display device according to the second embodiment, since the light shielding layer is provided in the peripheral region of the color filter substrate, the wiring pattern, the sealing resin, the conductive paste, and the like can be made invisible. Was sufficiently improved.

In the second embodiment, the second light-shielding layer 20a is formed at the portion where the gate signal line 3 is formed, and the second light-shielding layer 20b is formed at the portion where the source signal line 5 is formed.
The present invention is also applicable to a case where the second light-shielding layer is formed on only one of the two.

(Embodiment 3) FIGS. 6A and 6
FIG. 7B is a plan view of an active matrix substrate in the liquid crystal display device according to the third embodiment, and FIG.
FIG. 7A is a cross-sectional view taken along the line CC ′, and FIG.
FIG. 4 is a sectional view taken along the line -D '. 6 (A) and FIG.
FIG. 6A shows a gate signal line portion in a peripheral region, and FIG.
7B and FIG. 7B show a source signal line portion in a peripheral region.

In this active matrix substrate, a large island-shaped second light-shielding layer 21a covering all of the gate signal lines 3 in the peripheral region is formed, and all of the source signal lines 5 in the peripheral region are covered. Large island-shaped second
Was formed. On the other hand, as for the color filter substrate, similarly to the liquid crystal display device of Embodiment 1, two different colored layers were laminated as a light shielding layer on the color filter substrate.

In the liquid crystal display device according to the third embodiment, the second light shielding layer 21 provided on the active matrix substrate
Since the light transmittance of the peripheral region can be further reduced by a and 21b, the liquid crystal display device of the second embodiment can be used for applications requiring particularly high display quality, similarly to the liquid crystal display device of the second embodiment. The second light-shielding layers 21 a and 21 b are, for example, an interlayer insulating film 1 that covers the gate signal lines 3 and the source signal lines 5.
8 and is formed as a layer different from each signal line. In this case, the manufacturing process is longer than that of the liquid crystal display device of the second embodiment, but the capacitance between the second light shielding layers 21a and 21b and each signal line can be reduced by the interlayer insulating film 18. Further, since the second light-shielding layers 21a and 21b are formed so as to cover the gate signal lines 3 and the source signal lines 5, a pattern corresponding to each signal line is formed in the peripheral area as in the liquid crystal display device of the second embodiment. The problem of seeing was also improved.

Further, in the liquid crystal display device of the third embodiment, similar to the liquid crystal display device of the second embodiment, since the light shielding layer is provided in the peripheral region of the color filter substrate, the wiring pattern, the sealing resin, the conductive The paste and the like could not be seen, and the display quality could be sufficiently improved.

In the third embodiment, the second light-shielding layer 21a is formed in the portion where the gate signal line 3 is formed, and the second light-shielding layer 21b is formed in the portion where the source signal line 5 is formed.
The present invention is also applicable to a case where the second light-shielding layer is formed on only one of the two. Also, the second light shielding layer 21a,
Although 21b is formed in a large island shape covering all of the gate signal lines 3 and the source signal lines 5, it may be formed so as to cover two or more adjacent gate signal lines and source signal lines. Also, the large island-shaped second light-shielding layers 21a and 21b
As in the second embodiment, a pattern can be simultaneously formed using the same material as the gate signal lines and the source signal lines. In this case, a delay or the like may occur in the signal of each signal line. However, the signal can be applied to an application that can tolerate the delay, and the manufacturing process can be simplified.

(Embodiment 4) FIG. 8 is a plan view of an active matrix substrate in a liquid crystal display device of Embodiment 4.

In the peripheral region of the active matrix substrate, the source signal line 5 is formed in the region where the gate signal line 3 is formed.
A second light-shielding layer 20a is formed in the same layer as the above, and the outermost source signal line 5 in the display area is separated from the second light-shielding layer 20a at the boundary between the display area and the peripheral area. Although not shown, a second light-blocking layer 20b is formed in the same region as the gate signal line 5 in the formation region of the source signal line 3, and the outermost gate signal line 3 and the second light-shielding layer 20b in the display region are formed. The light-shielding layer 20b is separated at the boundary between the display area and the peripheral area. On the other hand, in the peripheral region of the color filter substrate, a light-shielding layer in which two different colored layers are stacked is provided, and covers the separated portion 22. In FIG. 8, reference numeral 2 denotes a TFT, reference numeral 4 denotes a pixel capacitance wiring which forms a pixel capacitance at a portion facing the pixel capacitance electrode 1a, and reference numeral 17b denotes a connection between the drain electrode 16b of the TFT 2 and the pixel electrode 19. Are connection electrodes. The connection electrode 17b is connected to the pixel electrode 19 via a contact hole 23 penetrating an interlayer insulating film (not shown).

The liquid crystal display of the fourth embodiment has the following advantages as compared with the liquid crystal display of the second embodiment. That is, in the liquid crystal display device according to the second embodiment, since light leaks from the separation portions 22 between the second light shielding layers 21a and 21b and the signal lines 3 and 5, light is blocked at the boundary between the peripheral region and the display region. Is a problem. On the other hand, in the liquid crystal display device of the fourth embodiment, since the light shielding layer provided in the peripheral region of the color filter substrate also covers the separation portion 22, light leakage from this portion can be prevented. The width of the separation portion 22 is at most about several tens of μm, and the light transmittance can be further reduced by covering the portion with a light-shielding layer composed of two different colored layers, so that the display quality is improved. To a certain level.

In the fourth embodiment, the second light-shielding layer 20a is formed in the gate signal line portion and the second light-shielding layer 20b is formed in the source signal line portion. It is also applicable to the case where the second light-shielding layer is formed in the first embodiment, or the case where only one of them covers the separation portion 22.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above configuration. For example, the light-blocking layer provided in the peripheral region of the color filter substrate has a structure in which red and blue coloring layers are stacked, but the present invention is not limited to this combination. For example, a configuration in which red and green coloring layers are stacked or a configuration in which blue and green coloring layers are stacked may be employed. However, in the case of a configuration in which red and blue coloring layers are stacked, the light transmittance can be made sufficiently lower than in the case where the other two coloring layers are stacked.
Further, as the light-shielding layer, a structure using two colored layers having different light absorption wavelength regions from the color layer of the color filter may be used instead of the color layer constituting the color filter.

In the above embodiment, the pixel electrode is
The POP structure is provided on the interlayer insulating film covering the gate signal line, the source signal line, and the TFT. However, without forming the interlayer insulating film, the pixel electrode is provided so as to partially overlap the drain electrode of the TFT. Is also good. However, when the pixel electrode is provided on the interlayer insulating film as in the fourth embodiment, since the pixel electrode and each wiring overlap each other, a voltage is applied to the portion where the pixel electrode is provided, and a voltage is applied to the liquid crystal layer. The region where no voltage is applied is shielded from light by each wiring. Therefore, a configuration in which the black matrix is not provided even in the display area can be achieved.

(Embodiment 5) FIG. 9 is a sectional view showing a main part of a liquid crystal display device according to this embodiment.

In this embodiment, instead of the light-shielding layer 32 formed by laminating two colored layers of different colors provided in the first embodiment, a light-shielding layer 34 made of a single colored layer is used. Provided in the same part as. Specifically, a B color layer of the color filter is provided as a light shielding layer 34 in a portion corresponding to a peripheral region of the color filter substrate. Other configurations are
The same as in the first embodiment.

Instead of the B color layer, an R or G color layer can be used. However, when the B color layer is used, the appearance looks darker than when the R or G color layer is used. There is an advantage.

Also in this embodiment, the light-shielding layer is formed of a single colored layer, and can have the same configuration as in the above-described second to fourth embodiments, and the same effect can be obtained. In this case, when the light-shielding layer 34 composed of a single colored layer is used as in the present embodiment, there are advantages in the following points as compared with the case where a light-shielded layer formed by laminating two colored layers is used. . One is that it is difficult to inspect the sealing resin provided in the peripheral region because it is shielded from light on both the active matrix substrate side and the color filter substrate side. The present embodiment can suppress more than the present embodiment. That is, since the light-shielding layer 34 is formed of a single colored layer, the visibility is small but good.

The other is that, in the case of a light-shielding layer formed by laminating two colored layers, the large difference between the peripheral area and the display area causes the rubbing condition (particularly the rubbing direction). The tendency that misalignment is likely to occur
It can be suppressed by reducing the thickness. Thereby, the non-defective product rate can be improved.

(Embodiment 6) FIG. 10 is a cross-sectional view showing a main part of a liquid crystal display device having a configuration capable of solving a problem that occurs when a light shielding layer is composed of one layer.

In the fifth embodiment, since the light-shielding layer 34 has a structure in which one coloring layer is formed over the entire area, the reflected light in the peripheral area appears to be colored, thereby deteriorating the display quality. There is.

Therefore, in the present embodiment, a single light-shielding layer has a configuration in which a plurality of color layers are arranged in parallel. Specifically, as shown in FIG.
The light-shielding layer 34 was formed by extending the color filter pattern formed of the R, G, and B color layers formed in the display area. FIG. 11 is a plan view showing a portion different from the portion shown in FIG.

In the case where the light-shielding layer 34 is provided, the light is obtained by combining the three colors, and the above problem can be solved. Further, there is no influence of a difference generated when two colored layers are stacked.

(Embodiment 7) FIG. 12 is a plan view showing a main part of a liquid crystal display device according to this embodiment.

In the sixth embodiment, the structure in which the pattern of the color filter formed in the display area is extended to the peripheral area to form the light-shielding layer is applied to a high-definition liquid crystal display device having a narrow color filter. However, the pattern of each color is not visually recognized separately, but when applied to a liquid crystal display device with a not so high definition, there is a problem that the color is visually recognized separately and the display quality deteriorates.

For this reason, in the present embodiment, the width of the color filter in the peripheral area is set smaller than that of the display area so that the patterns of the respective colors are not visually recognized separately. Specifically, in a 12.1 ″ SVGA stripe arrangement, the width of the color filter in the display area is about 140 μm,
The width of the color filter in the peripheral area was set to about 45 μm. As described above, when the width of the color filter in the peripheral region is formed sufficiently small, a display having high display quality can be obtained. The size of the pattern is 100 μm or less, preferably 70 μm.
The following is good, and if it is about 50 μm as in the present embodiment, it will not be visually recognized by human eyes. On the other hand, if the size is too small, patterning becomes difficult, which is meaningless. However, when applied to a projection type liquid crystal display device, it is preferable to make the size as small as possible because the image is enlarged and displayed.

In the above-described seventh embodiment, as shown in FIG. 13, the width of each of the R, G, and B color patterns may be set to be half of the display area in the peripheral area. Further, the pattern of the light-shielding layer in the peripheral region is not the above-mentioned stripe arrangement, but is R, G,
Each of the colors B may be arranged in an oblique direction. The arrangement shown in FIG. 14 is not limited to the seventh embodiment, but can be applied to the sixth embodiment.

Although the color layers of the color filters are used as the light-shielding layers in the above-described embodiments 5 to 7, the present invention is not limited to this, and the color layers of the color filters have different light absorption wavelength ranges. A colored layer may be used.

In each of the embodiments described above, the source signal line has a two-layer structure of a metal layer and an ITO layer, but may have a single-layer source signal line. However, with the two-layer structure as in the above-described embodiment, even if a part of the metal layer has a defect, the metal layer is electrically connected by the ITO layer, so that disconnection of the source signal line can be reduced. There is an advantage that you can.

In each of the above embodiments, an active matrix type liquid crystal display device using TFTs as switching elements has been described. However, in the present invention, an MIM (Metal Insulator) is used as a switching element.
It is needless to say that the present invention can be applied to a liquid crystal display device using another element such as a (Metal) element.

In the present invention, the light-shielding layer made of a colored layer can be provided so as to cover from the outermost edge of the display area to the seal area for bonding the active matrix substrate and the color filter substrate. . A configuration that does not cover the outermost part of the display area or the seal area is also possible,
When provided so as to cover the outermost edge of the display area, the boundary between the display area and the peripheral area can be shielded from light, and when the light-shielding layer is provided so as to cover the seal area, a sealing resin or the like is used. In addition, a conductive paste or the like for inputting a signal to the counter electrode can be made invisible, which is preferable.

[0070]

As is apparent from the above description, according to the present invention, the peripheral region can be shielded from light without forming a black matrix in the peripheral region of the color filter substrate. This light-shielding layer is composed of a single colored layer or a laminate of two colored layers different from each other, and can be formed in the same process as the pattern formation of the color layer of the color filter. The manufacturing cost can be reduced by reducing the number of black matrix forming steps. In particular, when the light-shielding layer is formed of a single colored layer, the seal resin provided in the peripheral region can be easily inspected, and the occurrence of poor alignment can be suppressed. When the single light-shielding layer is configured so that a plurality of color layers are mixed, it is possible to prevent light from being colored by the light-shielding layer.

Further, the second light-shielding layer provided in the peripheral area of the active matrix substrate can further reduce the light transmittance in the peripheral area and improve the display quality.

The second light-shielding layer can be formed simultaneously with the signal wiring or the scanning wiring, and the step of forming the second light-shielding layer does not need to be separately provided, which complicates the manufacturing process of the liquid crystal display device. I will not do it. In this case, if the light-shielding layer is provided so as to cover the separated portion between the outermost scanning wiring and the second light-shielding layer in the display area and the separated portion between the signal wiring and the second light-shielding layer, light leakage from this portion is provided. Can be prevented, and the display quality can be further improved.

The second light-shielding layer may be provided on a layer different from the scanning wiring and the signal wiring. In this case, the manufacturing process becomes longer. However, when the second light-shielding layer is provided on a thick film such as an interlayer insulating film, the capacitance between the second light-shielding layer and each wiring can be reduced. In addition, when the second light-blocking layer is provided so as to cover at least a range extending over at least one of the scanning wiring and the signal wiring, the wiring pattern is not visually recognized as a pattern, so that the display quality can be further improved. .

When a red coloring layer and a blue coloring layer are laminated as the light shielding layer, the light transmittance in the peripheral region can be minimized, and a liquid crystal display device with very good display quality can be realized. be able to.

[Brief description of the drawings]

FIG. 1 is a plan view of a liquid crystal display device according to a first embodiment.

FIG. 2 is a cross-sectional view illustrating a TFT portion of an active matrix substrate in the liquid crystal display device according to the first embodiment.

FIG. 3 is a cross-sectional view illustrating a main part of the liquid crystal display device according to the first embodiment.

FIGS. 4A and 4B are plan views of an active matrix substrate in a liquid crystal display device according to a second embodiment.
(A) and a gate signal line portion in a peripheral region.
(B) shows the source signal line portion in the peripheral area.

FIG. 5A is a sectional view taken along line AA ′ of FIG. 4A;
FIG. 4B is a sectional view taken along the line BB ′ of FIG.

FIGS. 6A and 6B are plan views of an active matrix substrate in a liquid crystal display device according to a third embodiment.
(A) and a gate signal line portion in a peripheral region.
(B) shows the source signal line portion in the peripheral area.

FIG. 7A is a cross-sectional view taken along the line CC ′ of FIG. 6A;
FIG. 7B is a cross-sectional view taken along the line DD ′ of FIG.

FIG. 8 is a plan view of an active matrix substrate in a liquid crystal display device according to a fourth embodiment.

FIG. 9 is a cross-sectional view illustrating a main part of a liquid crystal display device according to a fifth embodiment.

FIG. 10 is a cross-sectional view illustrating a main part of a liquid crystal display device according to a sixth embodiment.

FIG. 11 is a plan view illustrating a main part of a liquid crystal display device according to a sixth embodiment.

FIG. 12 is a plan view illustrating a main part of a liquid crystal display device according to a seventh embodiment.

FIG. 13 is a plan view showing a liquid crystal display device having another configuration to which the present invention can be applied.

FIG. 14 is a plan view showing a liquid crystal display device having another configuration to which the present invention can be applied.

FIG. 15 is a schematic view illustrating an example of an active matrix substrate.

FIG. 16 is a plan view showing a conventional liquid crystal display device.

[Explanation of symbols]

 1a Pixel capacitance electrode 2 TFT 3 Gate signal line 4 Pixel capacitance wiring 5, 17a, 10a Source signal line 11, 30 Transparent insulating substrate 12 Gate electrode 13 Gate insulating film 14 Semiconductor layer 15 Channel protective film 16a Source electrode 16b Drain electrode 17b Connection electrode 18 Interlayer insulating film 19 Pixel electrode 20a, 20b, 21a, 21b Second light shielding layer 22 Separation part 23 Contact hole 31 Color filter 32, 34 Light shielding layer 33 Sealing material

Claims (7)

[Claims] An active matrix substrate and a color filter substrate are opposed to each other with a liquid crystal layer interposed therebetween, and a portion where a pixel electrode provided on the active matrix substrate and a counter electrode provided on the color filter substrate face each other is a display area. In the liquid crystal display device in which an outer peripheral portion of the display region is a peripheral region, the active matrix substrate is arranged such that scanning wirings and signal wirings passing through the vicinity of each pixel electrode and intersecting each other exceed the peripheral region. The color filter substrate has a color filter in a portion corresponding to the display area, and a single layer of a colored layer in a portion corresponding to the peripheral area, or 2 of different colors
A liquid crystal display device having a configuration having a light shielding layer formed by laminating two colored layers. 2. A second light-shielding layer at a portion corresponding to the peripheral region of the active matrix substrate, at least covers a space between at least one adjacent wiring of the scanning wiring and the signal wiring, and 2. The liquid crystal display device according to claim 1, wherein a pattern is formed simultaneously with the wiring on the different side by using the same material as the wiring on the different side from the wiring to be covered. 3. The light-shielding layer, wherein the second light-shielding layer is provided so as to be separated from one of the scanning wiring and the signal wiring which is the outermost part of the display area, and the colored light-shielding layer covers the separated part. The liquid crystal display device according to claim 2, further comprising: 4. An insulating film covering the scanning wiring and the signal wiring is provided on the active matrix substrate, and a second light-shielding layer is provided at a portion corresponding to the peripheral region of the active matrix substrate, wherein the scanning wiring and the signal wiring are provided. 2. The liquid crystal display device according to claim 1, wherein a range covering at least one of the signal wirings is covered and the insulating film is provided between the signal wirings and the covered wiring. 5. The light-shielding layer formed by laminating two colored layers of different colors is a laminated layer of a red colored layer and a blue colored layer. Liquid crystal display device. 6. The color filter substrate according to claim 1, wherein the single light-shielding layer provided on the color filter substrate is formed in a state where a color filter formed in the display area is extended. Liquid crystal display. 7. The pattern of a single light-shielding layer provided on the color filter substrate is formed to be narrower than a color layer of a color filter formed in the display area.
3. The liquid crystal display device according to 1.