JP2000089215A - Liquid crystal display device and its manufacture - Google Patents

Liquid crystal display device and its manufacture

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Publication number
JP2000089215A
JP2000089215A JP26211398A JP26211398A JP2000089215A JP 2000089215 A JP2000089215 A JP 2000089215A JP 26211398 A JP26211398 A JP 26211398A JP 26211398 A JP26211398 A JP 26211398A JP 2000089215 A JP2000089215 A JP 2000089215A
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Japan
Prior art keywords
color filter
liquid crystal
layer
substrate
color
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Application number
JP26211398A
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Japanese (ja)
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JP3558533B2 (en
Inventor
Kenji Hamada
Katsuhiko Kishimoto
克彦 岸本
賢治 浜田
Original Assignee
Sharp Corp
シャープ株式会社
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Priority to JP26211398A priority Critical patent/JP3558533B2/en
Publication of JP2000089215A publication Critical patent/JP2000089215A/en
Application granted granted Critical
Publication of JP3558533B2 publication Critical patent/JP3558533B2/en
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Abstract

(57) [Problem] To provide a liquid crystal display device having a color filter, which can perform high-quality display and has a relatively simple manufacturing process. A liquid crystal display device is provided on a first substrate, a second substrate, a liquid crystal layer sandwiched between the first substrate and the second substrate, and a liquid crystal layer side of the first substrate. A color filter layer. The color filter layer includes a first color layer having a plurality of first color filter portions, and a second color layer having a second color filter portion. And a stacked color filter portion overlapping each other. The laminated color filter functions as a part of a black matrix provided between a plurality of picture elements. Alternatively, the laminated color filter functions as at least a part of a partition for axially symmetrically aligning liquid crystal molecules of the liquid crystal layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a liquid crystal display device and a method for manufacturing the same. In particular, the present invention relates to a liquid crystal display device having a color filter for performing color display and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, as a display device using an electro-optic effect, a TN (twisted nematic) or STN (super twisted nematic) type liquid crystal display device using a nematic liquid crystal has been used. In these liquid crystal display devices, typically, color display is performed by providing a color filter composed of a colored resin layer of red, green, and blue (R, G, and B) corresponding to each picture element on a substrate. .

One of the techniques for widening the viewing angle of a TN type liquid crystal display device
For example, JP-A-6-301015 and JP-A-7-120728 disclose a liquid crystal display device having liquid crystal molecules axially symmetrically aligned in a liquid crystal region divided by a polymer wall, that is, a so-called ASM (Axial Symm).
electronically aligned microce
An 11) mode liquid crystal display device is disclosed. Liquid crystal regions substantially surrounded by polymer walls are typically formed for each pixel. In the ASM mode liquid crystal display device, since the liquid crystal molecules are axially symmetrically aligned, the change in contrast is small even if the observer views the liquid crystal display device from any direction.
That is, it has a wide viewing angle characteristic.

The ASM mode liquid crystal display device disclosed in the above publication is manufactured by polymerizing and separating a mixture of a liquid crystal material having a positive dielectric anisotropy and a photocurable resin.

In Japanese Patent Application Laid-Open No. 8-341590, a liquid crystal layer sandwiched between a pair of substrates is formed using a liquid crystal material having a negative dielectric anisotropy. There has been proposed a liquid crystal display device in which molecules are aligned substantially perpendicular to a substrate and liquid crystal molecules are aligned in a plurality of liquid crystal regions when a voltage is applied.

A conventional ASM mode liquid crystal display device 500 in which the liquid crystal molecules of the liquid crystal layer have a negative dielectric anisotropy will be described with reference to FIGS. 3 (a) and 3 (b). The liquid crystal display device 500 has a color filter substrate 500a and a counter substrate 500b, and a liquid crystal layer 70 sandwiched between the color filter substrate 500a and the counter substrate 500b. The color filter substrate 500a has a color filter layer 52 for performing color display on the first glass substrate 50, and a transparent electrode 54 formed on the color filter layer 52. The color filter layer 52 will be described later in detail.

The color filter substrate 500a further includes a polymer wall 56 formed on the transparent electrode 54, for example, in a lattice shape.
And columnar projections 57 discretely arranged on the polymer wall 56
And The partition wall 56 divides the liquid crystal layer 70 into a plurality of liquid crystal regions 70a and makes the liquid crystal molecules in the liquid crystal region 70a be axially symmetrically aligned. Color filter substrate 500a
A vertical alignment film 58 is further formed on the surface of the liquid crystal layer 70 on the side of.

One counter substrate 500b is composed of a second glass substrate 60, a transparent electrode 64 formed on the second glass substrate 60, and a vertical alignment film 68 formed on the transparent electrode 64.
And

The color filter substrate 500a and the counter substrate 5
00b (cell gap; thickness of liquid crystal layer 70)
Is defined by the sum of the height of the partition wall 56 and the height of the columnar protrusion 57.

The operation of the ASM mode liquid crystal display device will be described below with reference to FIGS. 4 (a) to 4 (d). In a state where no voltage is applied to the liquid crystal region 70a, the liquid crystal molecules 72 are transferred to the vertical alignment film 58 formed on the liquid crystal layer 70 side of the substrates 500a and 500b as shown in FIG.
And 68, the alignment is perpendicular to the substrate surface. When this state is observed with a crossed Nicol state polarizing microscope, a dark field is obtained as shown in FIG. 4B (normally black state). When a voltage is applied to the liquid crystal region 70a,
Liquid crystal molecules 7 having negative dielectric anisotropy (ie, N-type)
2, the liquid crystal molecules 72 are tilted from a direction perpendicular to the substrate surface by a force acting to orient the major axis thereof perpendicular to the direction of the electric field (halftone display state). At this time, the liquid crystal molecules 7 in the liquid crystal region 70a are actuated by the action of the partition wall 56.
2 is axisymmetrically oriented about a central axis 75 shown by a broken line in the figure as shown in FIG. When this state is observed with a polarization microscope in a crossed Nicols state, as shown in FIG. 4D, an extinction pattern is observed in a direction along the polarization axis.

As described above, in the ASM mode liquid crystal display device, the structure of the partition wall is an important factor that determines the alignment state of the liquid crystal molecules. In addition, when the device is operated in the normally black mode as described above, there is no occurrence of a disclination line at the boundary portion, and a higher contrast can be obtained as compared with the conventional ASM mode liquid crystal display device operating in the normally white mode. it can.

The structure and method of forming the color filter substrate 500a of the conventional ASM mode liquid crystal display device 500 will be described with reference to FIGS. 5 (a-1) to 5 (f-1) and 5 (a-1).
This will be described with reference to 2) to (f-2). FIG. 5 (a-1)
5 (a-1) to (f-1) are sectional views, and FIGS.
2) are corresponding perspective views.

First, a black photosensitive resin layer is formed on a glass substrate 50, and the black layer 52a is patterned using photolithography or the like to form a plurality of striped black filters (FIG. 5 (a-1)). ) And (a-2)).
A plurality of striped black filters (black stripes) 52
a is typically formed at regular intervals so as to define a picture element. Next, for example, a red layer R having a plurality of red filter portions (red stripes) is formed by patterning (FIGS. 5B-1 and 5B-2). At this time, a part of the red stripe R is overlapped with a part of the black stripe 52a. Next, for example, a green layer G having a plurality of green filter portions (green stripes) is formed by patterning (FIG. 5).
(C-1) and (c-2)). At this time, green stripe G
Are overlapped with a part of the black stripe 52a. Next, for example, a blue layer B having a plurality of blue filter portions (blue stripes) is formed by patterning (FIG. 5).
(D-1) and (d-2)). At this time, the blue stripe B and a part of the black stripe 52a are overlapped.
Thus, the color filter layer 52 is formed. For each color layer (R, G, B), for example, a layer obtained by coloring a photosensitive resin material with a dye or a pigment is used.
m to 3 μm is common. As a method of forming each color layer, a method of applying a liquid photosensitive colored resin material (diluted with a solvent) to a substrate by a spin coating method or a method of transferring a photosensitive colored resin material formed into a dry film. and so on.

On top of these, a thickness of about 0.5 to 0.5 made of acrylic resin or epoxy resin is used to improve smoothness.
A 2.0 μm overcoat (OC) layer may be formed.

Thereafter, in order to complete the color filter substrate 500a, a transparent conductive film such as an indium tin oxide (ITO) film is deposited on the color filter layer 52, and is patterned to form a transparent electrode (not shown). To form Then, the partition walls 56 are patterned and formed thereon in a grid pattern (FIGS. 5 (e-1) and 5 (e-2)), and the columnar projections 57 are patterned and formed on the partition walls 56 (FIG. 5 (f- 1)
And (f-2)). The partition wall 56 is formed by spin-coating a photosensitive resin material, and then exposing and developing through a photomask having a predetermined pattern. The photosensitive resin material may be a negative type or a positive type. Although the number of steps for forming a separate resist film is increased, the resist film can be formed using a non-photosensitive resin material. Columnar projection 57
Is also formed by exposing and developing a photosensitive resin material.

Finally, the surface of the substrate on which the partition walls 56 and the columnar projections 57 are formed is covered with a vertical alignment film (not shown) of polyimide or the like to complete the color filter substrate 500a.

In the liquid crystal display device 500, the color filter substrate 500a manufactured as described above and the transparent electrode 62 made of ITO or the like are formed on the second glass substrate 60 by patterning, and then the vertical alignment film 68 made of polyimide or the like is formed. After bonding the opposite substrate 500b formed by film formation via the columnar protrusion 57, an N-type liquid crystal material is injected into a gap between the color filter substrate 500a and the opposite substrate 500b to form the liquid crystal layer 70. It is produced by this. Further, a process for aligning the liquid crystal molecules 72 in the liquid crystal region 70a defined by the partition wall 56 in an axially symmetric manner is performed. Specifically, for example, when a material in which a small amount of a photocurable resin is mixed with a liquid crystal material is used, the liquid crystal layer is irradiated with light while applying a predetermined voltage to form the liquid crystal layer with stable alignment. Can be. A polarizing plate is attached to the obtained liquid crystal panel,
Finally, a drive circuit and the like are mounted using, for example, the TAB method. By manufacturing an ASM mode liquid crystal display device in this manner, a color liquid crystal display device having a wide viewing angle characteristic can be obtained.

[0018]

However, the liquid crystal display device using the conventional color filter substrate has the following problems.

When forming a color filter layer used in a liquid crystal display device capable of displaying a color, stripes of three colors of red, green, and blue provided corresponding to picture elements due to misalignment generated when patterning each color layer. A gap may be formed between them. Conventionally, in order to shield the white light passing through the gap, a stripe-shaped black layer is provided between the stripes of each color to shield the light. If the line width of the black layer is too narrow, white light will be transmitted through gaps if the alignment of each color layer is misaligned. Conversely, if the width of the black line is increased, transmission of light due to misalignment can be prevented, but the aperture ratio of the color filter is reduced, leading to a reduction in display luminance.

As described above, in order to secure an alignment margin between the black layer used for light shielding between picture elements and the colored layers of each color, the width of the black stripe is made larger than the width of the gap between the color stripes (that is, black). It is necessary to make settings so that a part of the stripe and a part of the stripe of each color overlap), and as a result, the aperture ratio is reduced. Also,
A photolithography process for forming a black layer is required, which causes problems of manufacturing cost, manufacturing tact, particles, and alignment.

In order to solve these problems, a light shielding method using no black layer is disclosed in Japanese Patent Application Laid-Open No. 2-287303. In this method, two color filter layers are formed by slightly shifting the color pattern,
Light is shielded in areas where stripes of different colors overlap. However, in this method, stripes of different colors may not overlap even when the alignment is slightly shifted. Therefore,
It is very difficult to actually produce a color filter using this method having a small alignment margin.

Japanese Patent Application Laid-Open No. H10-62768 discloses that, in a peripheral portion of a display region of an active matrix type display device, a color filter layer of a different color is overlapped to shield the peripheral portion without providing a black layer. Techniques are disclosed. However, it does not disclose that this technique is applied between picture elements defined in a display area.

Further, when manufacturing a color filter substrate used in an ASM mode liquid crystal display device, there are the following problems.

When a mesh-like partition wall for forming a liquid crystal region having an axially symmetric alignment is formed on a color filter layer, the state of the base is determined by the film thickness formed by superimposing each color layer and a black layer. Becomes uneven. Since the partition wall is patterned thereon, very different shapes and thicknesses are formed, and the alignment is easily shifted during alignment. In addition, since the columnar projections need to be formed so as not to contribute to the alignment of the liquid crystal molecules when patterning the partitioning walls, the columnar projections must have a columnar shape smaller than the width of the partitioning walls. Therefore, for example, when high definition (HD) is required, the position where the column is to be erected is narrowed, and the column design is reduced, which causes a problem. Furthermore, the number of photolithography steps increases in order to form the structure of the partition walls and the columnar protrusions,
Manufacturing costs, manufacturing tact, particles, and alignment issues will arise.

The present invention has been made to solve the above problems, and provides a liquid crystal display device having a color filter capable of performing high-quality display and having a relatively simple manufacturing process. For that purpose.

[0026]

A liquid crystal display device according to the present invention comprises a first substrate, a second substrate, a liquid crystal layer sandwiched between the first substrate and the second substrate, A color filter layer provided on the liquid crystal layer side of the substrate, wherein the color filter layer includes a first color layer having a plurality of first color filter portions and a second color filter portion having a second color filter portion. Two color layers, the first color filter portion and the second color filter portion form a laminated color filter portion overlapping each other, and the laminated color filter portion includes a plurality of picture elements. The above-mentioned object is achieved by functioning as a part of the black matrix provided in the above.

Alternatively, the liquid crystal display device of the present invention comprises:
A substrate, a second substrate, a liquid crystal layer sandwiched between the first substrate and the second substrate, and a color filter layer provided on the liquid crystal layer side of the first substrate. A color filter layer including a first color layer having a plurality of first color filter units;
A second color layer having a second color filter portion, wherein the first color filter portion and the second color filter portion form a stacked color filter portion overlapping each other, The above object is achieved by a color filter functioning as at least a part of a partition for axially symmetrically aligning liquid crystal molecules of the liquid crystal layer.

The color filter layer may include only a red layer having a plurality of red filter portions, a green layer having a plurality of green filter portions, and a blue layer having a plurality of blue filter portions.

The plurality of first color filter portions and the plurality of second color filter portions are stripe color filter portions provided in parallel with each other, and the multilayer color filter portion is a stripe multilayer color filter. Portion, further comprising a plurality of stripe-shaped walls provided on the color filter layer of the first substrate, the plurality of stripe-shaped walls are substantially the same as the stripe-shaped laminated color filter portion 90 °
May be provided at regular intervals so as to intersect.

[0030] An intersection of the striped color filter portion and the plurality of striped walls may function as a spacer for defining an interval between the first substrate and the second substrate.

The operation will be described below.

In the liquid crystal display device according to the present invention, a portion of the color filter layer for color display in which the first color filter portion and the second color filter portion overlap each other is one of black matrices provided between picture elements. Functions as a unit. Therefore,
It is possible to shield light between picture elements without providing a separate light shielding layer (black matrix) for shielding light between picture elements.

In the liquid crystal display of the present invention,
A portion where the first color filter portion and the second color filter portion of the color filter layer for color display overlap each other functions as at least a part of a partition wall for forming a liquid crystal region in which liquid crystal molecules are axially symmetrically aligned. I do. With such a configuration, unlike the related art, it is not necessary to provide a part of the partition on a surface region having irregularities formed by overlapping a black layer provided as a light shielding layer and each color layer. Or
It is not necessary to separately provide a layer (overcoat layer) for flattening irregularities on the surface of the color filter layer. Further, light can be shielded between picture elements without providing a black matrix for shielding light between picture elements in the color filter layer.

Further, by forming the color filter layer only with the red, green and blue layers, high quality full-color display can be performed without separately forming a black matrix (black layer). The gap (60 μm) may be formed even if misalignment occurs (up to 5 μm) by using the portion (60 μm to 70 μm) where the black layer was conventionally used as a margin when overlapping the red layer, the green layer and the blue layer. Is reduced, so that light leakage can be reduced. In addition, it is possible to eliminate a decrease in aperture ratio caused by using a black layer having a width larger than the interval between the respective color layers. Further, with such a configuration, the number of photolithography steps for forming the color filter layer is reduced from four times of black, red, green, and blue to three times of red, green, and blue, so that manufacturing costs are reduced. , And an improvement in manufacturing yield.

The stripe-shaped wall formed so as to intersect at 90 ° at a predetermined interval in the stripe-shaped portion where the respective color layers are overlapped with each other has a partition provided substantially in a grid-like shape together with the overlapping portion. Walls can be formed.
The partition wall has a function of defining a liquid crystal region and arranging liquid crystal molecules axially symmetrically for each liquid crystal region. The liquid crystal region is typically formed so as to correspond to a picture element.

The portion where the stripe-shaped wall overlaps the stripe-shaped portion in which the respective color layers are overlapped functions as a spacer for defining the gap between the substrates (the thickness of the liquid crystal layer). Therefore, it is not necessary to separately form the columnar projection on the partition wall as in the related art, and the manufacturing process can be simplified.

[0037]

1A and 1B are a cross-sectional view and a plan view of an axially symmetric mode (ASM mode) liquid crystal display device 100 according to this embodiment. Liquid crystal display device 100
Are a color filter substrate 100a and a counter substrate 100b
And a liquid crystal layer 30 sandwiched between a color filter substrate 100a and a counter substrate 100b. For simplicity,
In FIG. 1B, the counter substrate 100b is omitted.

The color filter substrate 100a includes a color filter layer 12 for performing color display on the first glass substrate 10, a transparent electrode 14 formed on the color filter layer 12, a color filter layer 12 and the transparent electrode 14. And a stripe-shaped wall 13 made of a transparent resist material or the like formed thereon. The color filter layer 12 includes a red layer including a plurality of red filter portions (red stripes) R, a green layer including a plurality of green filter portions (green stripes) G, and a plurality of blue filter portions (blue stripes) B. It is formed only from a blue layer, and has a stripe R of each color,
G and B form a stripe-shaped laminated portion 12a overlapping each other. Striped wall 13 made of transparent resist or the like
Are formed so as to substantially intersect with the stripe-shaped laminated portion 12a at 90 °. Also, the striped castle wall 13
Form a projection 13a at a portion that intersects and overlaps the stripe-shaped laminated portion 12a. The thus provided striped laminated portion 12a and striped wall 13 divide the liquid crystal layer 30 into a plurality of liquid crystal regions 30a. Further, the color filter substrate 100a includes the liquid crystal layer 30.
A vertical alignment film 18 is provided on the side surface.

As described above, in this embodiment, since the stripe-shaped laminated portion 12a is formed by overlapping two different-colored stripes, it functions as a light-shielding layer for preventing light transmission. Typically, stripes of each color are provided so as to correspond to picture elements. Therefore, the striped laminated portion 12
a functions as a part of a conventional black matrix provided between picture elements.

In the liquid crystal display device 100, the liquid crystal molecules in the liquid crystal region 30a defined by the plurality of stripe-shaped walls 13 provided on the color filter substrate 100a and the stripe-shaped laminated portion 12a are axially symmetrically aligned.
The liquid crystal region 30a is typically formed so as to correspond to a picture element.

One counter substrate 100b is composed of the second glass substrate 20 and the transparent electrode 2 formed on the second glass substrate 20.
4 and a vertical alignment film 28 formed on the transparent electrode 24.

The color filter substrate 100a and the counter substrate 1
00b (cell gap; thickness of liquid crystal layer 30)
Indicates the overlapping portion of different colors (stripe-shaped laminated portion) 1
It is defined by the sum of the height of 2a and the height of the protrusion 13a of the striped wall 13 located thereon.

FIGS. 2 (a-1) to 2 (d-1) and FIG.
-2) to (d-2), referring to the AS of the present embodiment.
The manufacturing process of the color filter substrate 100a used for the M-mode liquid crystal display device will be described below. FIG. 2 (a-
1) to (d-2) are cross-sectional views, and FIGS.
(D-2) is a corresponding perspective view.

First, a plurality of red stripes R having a thickness of 1.5 μm and a line width of 360 μm are formed on the first glass substrate 10.
The red layer is patterned by using, for example, a technique such as photolithography (FIG. 2 (a-1) and (a-2)) so as to form. Next, the green layer is patterned so as to form, for example, a plurality of green stripes G with similar dimensions (film thickness, line width). At this time, a part of the red stripe R is made to sufficiently overlap with a part of the green stripe G (see FIG.
1) and (b-2)). Next, the blue layer is patterned so as to form, for example, a plurality of blue stripes B with similar dimensions. At this time, the blue stripe B is made to sufficiently overlap with a part of the red stripe R and a part of the green stripe G (FIGS. 2 (c-1) and (c-2)). The width at which the stripes of two different colors overlap is 80 μm. Each color layer including each color stripe can be patterned by using a conventional method.

In the present embodiment, the color filter layer 12
Is formed of only a red layer, a blue layer, and a green layer, and does not use a black layer. Therefore, for example, a step of forming a color layer such as a photolithography step includes red,
Only three times for blue and green are required. In the color filter layer 12 thus formed, a portion where stripes of different colors overlap forms a protruding stripe-shaped laminated portion 12a with respect to other flat portions.

Next, on the color filter layer 12, an ITO
A transparent electrode (not shown) is formed by depositing a transparent conductive film such as a film by an evaporation method or the like, and patterning the film.

Thereafter, stripe-shaped walls 13 made of, for example, a transparent resist are patterned and formed at predetermined intervals so that the stripes of different colors intersect at 90 ° with the extending direction of the protruding stripes formed by overlapping. (FIGS. 2 (d-1) and (d-2)). Such a striped wall 13 can be formed using a known method. The stripe-shaped wall 13 has a height of 4.0 μm, for example.
It is formed to have a line width of 20 μm. In this embodiment,
Since the stripe-shaped wall 13 is provided on the substantially flat color filter layer 12 except for the projection 13a which is a portion intersecting with the stripe-shaped laminated portion 12a, there is a variation in shape due to an uneven base. And misalignment can be reduced.

In the present embodiment, in the step of forming the stripe-shaped wall 13, the projection 13a as a spacer for defining the thickness between the substrates is formed at the same time. It becomes unnecessary. Further, since the stripe-shaped wall 13 and the projection 13a are formed at the same time, the problem of displacement of the columnar structure which may occur in the step of forming the conventional columnar structure on the partition wall is eliminated.

Thereafter, a vertical alignment film such as polyimide is applied on the surface to complete the color filter substrate 100a.

To manufacture the liquid crystal display device 100, the color filter substrate 100a manufactured as described above
Transparent electrode 2 made of ITO or the like on second glass substrate 20
After patterning formation of No. 4, a counter substrate 100b manufactured by forming a vertical alignment film 28 of polyimide or the like is bonded via the protrusion 13a. Color filter substrate 1
A liquid crystal layer 30 is formed by injecting an N-type liquid crystal material into a gap between the substrate 00a and the counter substrate 100b. Furthermore, as before,
A process for aligning the liquid crystal molecules in the liquid crystal region 30a defined by the stripe-shaped wall 13 and the stripe-shaped laminated portion 12a in an axially symmetric manner is performed. Specifically, for example, when a material in which a small amount of a photocurable resin is mixed with a liquid crystal material is used, the liquid crystal layer is irradiated with light while applying a predetermined voltage to form the liquid crystal layer with stable alignment. Can be.
A polarizing plate is attached to the obtained liquid crystal panel, and finally, a drive circuit and the like are mounted using, for example, a TAB method. By manufacturing an ASM mode liquid crystal display device in this manner, a color liquid crystal display device having a wide viewing angle characteristic can be obtained.

The liquid crystal display device 100 manufactured as described above
Can display in the axially symmetric mode by applying various conventional driving methods. For example, a driving method such as an active matrix type, a simple matrix type, or a plasma address type is applied. The shape and material of the electrode can take various forms depending on the driving method to be applied.

In this embodiment, an ASM-mode liquid crystal display device is manufactured using an N-type liquid crystal material and a vertical alignment film. However, a P-type liquid crystal material having a positive dielectric anisotropy of liquid crystal molecules is used. It goes without saying that this may be done.

[0053]

According to the present invention, there is provided a color liquid crystal display device capable of shielding light between picture elements without providing a separate light-shielding layer (black matrix) color filter layer for shielding light between picture elements. You. Therefore, when forming a color filter layer, a photolithography step for providing a black matrix is not required, so that manufacturing cost is reduced and manufacturing yield is improved. In addition, by using a portion for providing a black matrix, which has been conventionally required, as an alignment margin, the possibility of light leakage between picture elements due to misalignment can be reduced.

According to the present invention, it is not necessary to provide a part of a partition on a surface region having irregularities formed by overlapping a black layer provided as a light shielding layer and each color layer as in the conventional case. , An ASM mode liquid crystal display device is provided. Since the partition wall defining the liquid crystal region has a stable shape, high-quality display is achieved.

Also, a plurality of stripe-shaped walls are provided at regular intervals so as to substantially intersect with the overlapping portions of the stripe-shaped color layers at 90 °, thereby forming a grid-shaped section for obtaining the ASM mode. The wall can be formed in a stable shape and thickness, and the stripe-shaped wall formed on the overlapping portion of each color layer functions as a columnar projection serving as a spacer between the substrates. Therefore, the step of forming the conventional columnar projection can be omitted. In addition, since it is not necessary to form columnar projections on a surface having irregularities as in the related art,
The shape and thickness of the columnar projections are stabilized, and the misalignment can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing one embodiment of a liquid crystal display device of the present invention. (A) is a sectional view, and (b) is a plan view. (A)
Corresponds to the line XX ′ in (b).

FIG. 2 is a diagram illustrating a process for manufacturing a color filter layer used in the liquid crystal display device of the present invention. (A-1)-
(D-1) is a sectional view, and (a-2) to (d-2) are perspective views.

FIG. 3 is a diagram showing a conventional ASM mode liquid crystal display device. (A) is a sectional view, and (b) is a plan view. (A)
Corresponds to the line XX ′ in (b).

FIG. 4 is a diagram showing an operation of a conventional ASM mode liquid crystal display device. (A) and (b) when no voltage is applied, (c)
(D) shows the state of the liquid crystal display device when a voltage is applied.

FIG. 5 is a diagram illustrating a process of manufacturing a color filter layer used in a conventional ASM mode liquid crystal display device.
(A-1) to (f-1) are cross-sectional views, and (a-2) to (f-
2) is a perspective view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 1st glass substrate 12 Color filter layer 12a Stripe laminated part 13 Striped wall 13a Convex part 14 Transparent electrode 18 Vertical alignment film 20 Second glass substrate 24 Transparent electrode 28 Vertical alignment film 30 Liquid crystal layer 30a Liquid crystal area 100 Liquid crystal display 100a Color filter substrate 100b Counter substrate R Red layer (red filter section) G Green layer (green filter section) B Blue layer (blue filter section)

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H048 BA45 BB02 BB07 BB14 BB44 2H091 FA02Y FA35Y FB04 FC10 FC12 FD06 GA06 GA08 JA02 LA12 LA16 LA18

Claims (5)

[Claims]
1. A first substrate, a second substrate, a liquid crystal layer sandwiched between the first substrate and the second substrate, and a color filter provided on the liquid crystal layer side of the first substrate. A liquid crystal display device comprising: a first color layer having a plurality of first color filter portions; and a second color layer having a second color filter portion. The first color filter section and the second color filter section form a stacked color filter section overlapping each other, and the stacked color filter section is one of black matrices provided between a plurality of picture elements. A liquid crystal display device that functions as a unit.
2. A first substrate, a second substrate, a liquid crystal layer sandwiched between the first substrate and the second substrate, and a color filter provided on the liquid crystal layer side of the first substrate. A liquid crystal display device comprising: a first color layer having a plurality of first color filter portions; and a second color layer having a second color filter portion. The first color filter portion and the second color filter portion form a laminated color filter portion that overlaps with each other, and the laminated color filter portion makes the liquid crystal molecules of the liquid crystal layer axially symmetrically aligned. A liquid crystal display device functioning as at least a part of the partition wall.
3. The color filter layer according to claim 1, wherein the color filter layer includes only a red layer having a plurality of red filter portions, a green layer having a plurality of green filter portions, and a blue layer having a plurality of blue filter portions. 3. The liquid crystal display device according to 2.
4. A plurality of first color filter portions and a plurality of second color filter portions are stripe color filter portions provided in parallel with each other, and the multilayer color filter portion is a stripe color laminate. A color filter portion, further comprising a plurality of striped walls provided on the color filter layer of the first substrate, wherein the plurality of striped walls are substantially the same as the striped laminated color filter portion. The liquid crystal display device according to claim 2, wherein the liquid crystal display device is provided at regular intervals so as to intersect at 90 °.
5. The method according to claim 4, wherein an intersection at which the stripe-shaped color filter section and the plurality of stripe-shaped walls intersect functions as a spacer for defining an interval between the first substrate and the second substrate. The liquid crystal display device according to the above.
JP26211398A 1998-09-16 1998-09-16 Liquid crystal display Expired - Fee Related JP3558533B2 (en)

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US6969948B2 (en) 2001-12-06 2005-11-29 Sony Corporation Display and method of manufacturing the same
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KR100984353B1 (en) 2003-10-16 2010-10-01 삼성전자주식회사 color filter panel and liquid crystal display of using the same
KR101224582B1 (en) * 2006-01-16 2013-01-22 삼성디스플레이 주식회사 Liquid crystal display panel and method for fabricating the same
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Publication number Priority date Publication date Assignee Title
JP2001337318A (en) * 2000-05-30 2001-12-07 Hiroshima Opt Corp Liquid crystal display element
JP4569992B2 (en) * 2000-05-30 2010-10-27 オプトレックス株式会社 Liquid crystal display element
US6969948B2 (en) 2001-12-06 2005-11-29 Sony Corporation Display and method of manufacturing the same
US6971938B2 (en) 2001-12-06 2005-12-06 Sony Corporation Display and method of manufacturing the same
WO2003085450A1 (en) * 2002-04-04 2003-10-16 Sony Corporation Liquid crystal display
EP1437778A2 (en) * 2003-01-10 2004-07-14 Eastman Kodak Company Oled displays having improved contrast
EP1437778A3 (en) * 2003-01-10 2008-01-09 Eastman Kodak Company Oled displays having improved contrast
CN1296731C (en) * 2003-05-27 2007-01-24 统宝光电股份有限公司 Color unit configuration structure of color filter
KR100984353B1 (en) 2003-10-16 2010-10-01 삼성전자주식회사 color filter panel and liquid crystal display of using the same
KR101224582B1 (en) * 2006-01-16 2013-01-22 삼성디스플레이 주식회사 Liquid crystal display panel and method for fabricating the same
JP2015072827A (en) * 2013-10-03 2015-04-16 大日本印刷株式会社 Organic electroluminescence display device
CN104851983A (en) * 2014-02-14 2015-08-19 精工爱普生株式会社 Manufacturing method of organic light emitting device, organic light emitting device and electronic apparatus
JP2018527614A (en) * 2015-08-17 2018-09-20 深▲せん▼市華星光電技術有限公司Shenzhen China Star Optoelectronics Technology Co., Ltd. Color filter array substrate and liquid crystal display panel

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