JPH08194216A - Color filter for liquid crystal display - Google Patents

Abstract

PURPOSE: To eliminate the unequal whiteness of panel display by a difference in the height of bead spacers by improving the non-pixel regions N of color filters to be used for a color liquid crystal display panel of a bead dispersion type to a mesh form, or crossed grid form, etc. CONSTITUTION: The color filters have pixel regions I which are arranged regularly with many color pixels R, G, B for color display by colored layers 12 on a transparent substrate 11 and are formed with a light shieldable black matrix 13 in the adjacent boundary parts of each one pixel and the light shieldable non-pixel regions N of an outside contour shape which are disposed in continuation with the outer side of the pixel regions 1. The light shieldable non-pixel regions N are formed as the meshed or crossed grid-like or parallel grid-like light shieldable patterns 20 so that the bead spacers 3 submerge into the corresponding parts between the meshes or the grids.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color filter used in a bead-dispersed color liquid crystal display panel in which a transparent bead spacer is dispersed and coated with a liquid crystal, and a pixel for color display is provided on a transparent substrate. A pixel region in which a plurality of pixels are regularly arranged, and a thin line-shaped light-shielding black matrix pattern is formed at an adjacent boundary portion of each pixel,
The present invention relates to a color filter for liquid crystal display, in which the light-shielding non-pixel region is improved in a color filter including an outer light-shielding non-pixel region continuously provided outside the pixel region.

[0002]

2. Description of the Related Art A conventional bead-dispersed color liquid crystal display panel is generally arranged on one side of a transparent substrate 1 (glass substrate), as shown in the side sectional view of the XX portion on one side of the panel shown in FIG. The first substrate A is formed by providing a transparent electrode film 2 (ITO film or the like) having a film thickness of 300 to 2000 Å in an active matrix form or a conductive pattern form (stripe form).

Further, the XX partial side sectional view of one side of the color filter of FIGS. 5 and 6A, the color filter partial plan view of FIG. 6B, and the color filter overall schematic plan view of FIG. 6C are shown. As shown, the other transparent substrate 1 facing this
1 (glass substrate) is colored with a red color R, a green color G, and a blue color which are rectangular in plan view (may be a honeycomb shape, a circular shape, etc.) and become color pixels (pixels) for color liquid crystal display. Colored layer 1 of each color consisting of B
2 (a colored layer having a film thickness of, for example, about 1.0 to 2.5 μm, which becomes a color pixel) is regularly arranged, and each colored layer 12
The thin line-shaped light-shielding black matrix 13 (for example, a film thickness of 0.6 to 0.8) is provided on the boundary between the pixels adjacent to each other.
(about .mu.m) is formed, and a rectangular pixel region I is provided as a whole, for example.

Further, as shown in FIGS. 5 and 6A to 6C, outside the pixel area I, the light-shielding black matrix 13 is continuous so as to surround the pixel area I. -Shaped light-shielding layer 16 (for example, a film thickness of 0.6 to 0.8)
A light-shielding non-pixel region N having an outer shape (for example, a rectangular ring shape) formed of about μm) is provided.

Then, as shown in FIG. 5, a colored layer 12 is formed on the entire surface of the rectangular pixel region I formed on the substrate 11 and the entire outer surface of the non-pixel region N or the inner portion thereof. A synthetic resin film having a thickness of 2 μ is formed on the entire surface of the colored layer 12.
The transparent overcoat layer 14 having a thickness of about m to 3 μm, and the film thickness on the entire surface of the colored layer 12 of each color or in a conductive pattern shape (a stripe shape orthogonal to the transparent electrode film 2 in a stripe shape). The second substrate B is formed by providing the transparent electrode film 15 (ITO film or the like) having a thickness of 300 to 2000Å in this order.

On the ITO film 2 of the first substrate A or /
A liquid crystal alignment film (not shown) is provided on the entire surface of the second substrate B from the ITO film 15.

In the bead-dispersed color liquid crystal display panel, as shown in FIG. 5, the ITO film 2 forming side of the first substrate A and the ITO film 15 forming side of the second substrate B are parallel to each other. Liquid crystal cells 17 are provided by forming a gap at an appropriate interval on the inner side of the overlapping, and an appropriate amount of granular (spherical or cylindrical) transparent bead spacers 3 are dispersed and applied in the liquid crystal cells 17. After that, the liquid crystal L is filled, and the substrates 1 and 11 are formed by joining and sealing the edge portions of the substrates 1 and 11 with a joining sealing material 18 such as an adhesive (sealing material such as an epoxy adhesive).

In the above liquid crystal color display panel, the transparent bead spacers 3 having a predetermined particle size (for example, a diameter of about 5 μm) are applied in a dispersed state as a spacer for keeping a predetermined amount of uniform gap before the liquid crystal L is sealed. After that, the liquid crystal L is enclosed, and the transparent bead spacers 3 are dispersed together with the liquid crystal L in a single layer state in the liquid crystal cell 17 in the overlapping gap between the first substrate A and the second substrate B in the vacuum chamber. By enclosing, a predetermined amount of gap corresponding to the particle diameter of the beads is maintained.

Further, as another example of the above-mentioned conventional color liquid crystal display panel of the bead dispersed type, a sectional view taken along the line XX of one side of the color filter in FIGS. 7 and 8A, and a color in FIG. 8B. As shown in the filter partial plan view and the color filter overall plan view of FIG. 8C, the other transparent substrate 11 facing the one transparent substrate 1 becomes a color pixel (pixel) for color liquid crystal display. A large number of colored layers 12 of red R, green G, and blue B colored in a stripe-like planar shape are regularly arranged, and the pixels of each colored layer 12 are adjacent to each other adjacent to each other. A thin line-shaped light-shielding black matrix 13 is formed in the portion, and a rectangular pixel region I is provided as a whole, for example.

Further, as shown in FIGS. 7 and 8A to 8C, outside the pixel area I, a solid shape which is continuous with the light-shielding black matrix 13 so as to surround the pixel area I is provided. An outer shape (for example, a rectangular ring shape) light-shielding non-pixel region N formed by the light-shielding layer 16 is provided.

Then, as shown in FIG.
The colored layer 12 is formed so as to hang over the entire surface of the rectangular pixel region I formed above and the entire surface or inner portion of the outer non-pixel region N, and the transparent overcoat layer 1 is formed on the entire surface of the colored layer 12.
4 and the transparent electrode film 15 (ITO film) on the colored layer 12 of each color entirely or in a conductive pattern (in a stripe shape orthogonal to the transparent electrode film 2 in a stripe shape).
Are provided in this order to form the second substrate B.

On the ITO film 2 of the first substrate A or /
A liquid crystal alignment film (not shown) is provided on the entire surface of the second substrate B from the ITO film 15.

The bead-dispersed color liquid crystal display panel is
As shown in FIG. 7, the side of the first substrate A on which the ITO film 2 is formed and the side of the second substrate B on which the ITO film 15 is formed are parallel to each other, and are overlapped with each other at appropriate intervals. A liquid crystal cell 17 is provided by forming a gap, and the liquid crystal cell 1 is provided.
After a suitable amount of granular transparent bead spacers 3 are dispersed and applied in the interior 7, liquid crystal L is filled and enclosed, and the substrates 1 and 11 are provided with an adhesive 18 (sealing material such as an epoxy adhesive) at the edge portions thereof. Are formed by joining.

In the liquid crystal color display panel, the transparent bead spacers 3 having a predetermined particle diameter (for example, a diameter of about 5 μm) are dispersed and applied as a spacer for maintaining a predetermined amount of uniform gaps before the liquid crystal L is enclosed. The liquid crystal L is encapsulated, and together with the liquid crystal L, the transparent bead spacers 3 are dispersed and encapsulated in a single layer in the liquid crystal cell 17 in the overlapping gap between the first substrate A and the second substrate B in the vacuum chamber. As a result, a predetermined amount of gap corresponding to the bead diameter is maintained.

[0015]

In the color filter of the conventional liquid crystal color display panel described above, as shown in FIGS. 5 and 7, each of red, green and blue layers laminated on the second substrate B is formed. The film surface height of the colored layer 12, the transparent overcoat layer 14, and the transparent electrode film 15 is formed high especially on the black matrix 13 and the light shielding layer 16.

The black matrix 13 of the pixel region I formed on the second substrate B has a predetermined pitch (for example, 100 to 300) sufficiently larger than the particle diameter of the bead spacer 3.
However, the light-shielding layer 16 in the non-pixel region N is wider than the matrix width of the black matrix 13 in the pixel region I (for example, about 10 to 50 μm) (for example, about 500 to 5000 μm or more). , It is formed in a solid shape.

In the pixel area I, the bead spacer 3 in the liquid crystal filled cell 17 between the first substrate A and the second substrate B is
While overcoming the relatively narrow black matrix 13, the matrix 13 and 13 are dispersedly present in the lower position of the relatively thin film corresponding to the pixel above, while in the non-pixel region N, a solid image is formed. There is a tendency that the light-shielding layers 16 are dispersed at high positions corresponding to the upper side of the light-shielding layer 16. Therefore, as shown in FIGS. 5 and 7, the bead spacers 3 dispersed in the pixel regions I and the non-pixel regions N have high and low levels. The difference T (eg 5.5
In the case of STN (Super Twist Nematic) liquid crystal display system, if the thickness of the liquid crystal layer is not within the range of 5 ± 0.5 μm, the pixel region I White unevenness is likely to occur in the panel display at the boundary with the non-pixel region N.

The liquid crystal color display panel assembled by dispersing and enclosing the liquid crystal L and the spacer 3 in the single layer state in the liquid crystal encapsulation cell 17 between the first substrate A and the second substrate B is at atmospheric pressure, Due to the negative pressure in the liquid crystal filled cell 17, a stress is applied to the first substrate A and the second substrate B in a direction closer to each other, and as a result, as shown in FIGS. Due to the height difference T, the first substrate A, the second substrate B, or any one of them is deformed in a direction in which the first substrate A and the second substrate B hang from the panel peripheral portion to the central portion and gradually approach each other.

Therefore, due to the height difference T of the bead spacers 3 dispersed in the pixel region I and the non-pixel region N, a non-uniform gap is generated in the liquid crystal filled cells 17 of the panel, and the boundary between the pixel region I and the non-pixel region N is generated. White spots may appear on the panel display of a part.

An object of the present invention is to provide a non-pixel region N of a color filter used in a bead dispersed type color liquid crystal display panel.
By improving the height difference T of the bead spacers 3 dispersed in the pixel region I and the non-pixel region N, and the liquid crystal sealed cell 17 of the assembled color liquid crystal display panel 17 is improved.
This is to prevent non-uniform gaps from occurring in the panel and white spots from appearing on the panel display.

[0021]

According to a first aspect of the present invention, a large number of color pixels R, G, B for color display by a colored layer 12 are regularly arranged on a transparent substrate 11, and each pixel is arranged one by one. A bead-dispersed color including a pixel region I in which a light-shielding black matrix 13 is formed in the adjacent boundary part of the pixel region I and an outer light-shielding non-pixel region N continuously provided outside the pixel region I. In a liquid crystal display color filter for a liquid crystal display panel, a light-shielding non-pixel region N is formed as a light-shielding pattern 20 having a mesh shape, a cross lattice shape, a parallel lattice shape, or the like, and the colored layer 12 is formed in the light-shielding non-pixel area N. Is a color filter for a liquid crystal display.

Next, in the second invention of the present invention, the transparent bead spacer 3 (maximum particle size 2r) is provided on the colored layer 12 in the portion corresponding to the mesh or the lattice of the light shielding pattern 20 in the color filter for liquid crystal display. Is a color filter for a liquid crystal display.

The present invention also provides the colored layer 12 formed in the light-shielding non-pixel region N in the first or second invention, wherein each colored pixel R, G, G for color display in the pixel region I. The color filter for liquid crystal display is formed of a coloring material having the same composition, the same color, or the same color density as the coloring layer 12 forming B.

The present invention is also the same as the first or second invention, wherein the colored layer 12 formed in the light-shielding non-pixel region N includes color pixels R, G, for color display of the pixel region I. The color filter for liquid crystal display is formed of a coloring material having a different composition, a different color, or a different color density from the coloring layer 12 forming B.

According to the present invention, in the first or second invention, the relationship between the pitch Pi of the light-shielding black matrix 13 in the pixel area I and the pitch Pn of the light-shielding pattern 20 in the non-pixel area N is Pi. ≧ Pn, and the relationship between the width Di of the light-shielding black matrix 13 in the pixel region I and the width Dn of the light-shielding pattern 20 in the non-pixel region N is Di ≦ Dn.

Further, in the invention, in the first or second invention, the pitch Pi of each color pixel R, G, B of the pixel region I formed on the transparent substrate is 60 to 300 μm at maximum.
And the maximum width Di of the light-shielding black matrix 13 formed at the adjacent boundary of each pixel is 10 to 5
0 μm, and the width n of the light-shielding non-pixel region N is 500
It is a color filter for liquid crystal display having a thickness of up to 5000 μm.

The present invention also relates to the first or second invention, wherein the overcoat layer 1 is formed on the colored layer 12.
4 or a color filter for liquid crystal display provided with an overcoat layer 14 and a transparent electrode film 15.

[0028]

EXAMPLE A color filter for liquid crystal display according to the first aspect of the present invention will be described in detail with reference to an example shown in FIGS. 1 (a) to 1 (c) and FIG.

FIG. 1A is a schematic side sectional view of an XX portion of a liquid crystal display color filter in one embodiment, and FIG. 1B is a partial outline of a liquid crystal display color filter in one embodiment. FIG. 1C is a plan view of the entire color filter for liquid crystal display in one embodiment.

As shown in FIG. 1A, the color filter for a liquid crystal display of the above-described embodiment has a transparent substrate 11 such as a glass substrate or a plastic substrate on which a pigment dispersion of red, green or blue is dispersed. Type photoresist, or each color printing ink, or each color dye and dyeing resin, or an inorganic material multilayer film, etc., respectively, with a transparent colored layer 12 formed in a colored pattern in red, green, or blue, respectively. Each color pixel R, G, B for color display
Are regularly arranged. In addition, each color pixel R,
The pixel pitch Pi of G and B is set appropriately according to the screen size of the liquid crystal display panel using the color filter for liquid crystal display, but is, for example, 60 to 300 μm at maximum.

Below the colored layer 12, each pixel R,
In each of the adjacent boundary portions of G and B, for example, a light-shielding black matrix 13 (or a mesh shape such as a honeycomb shape (not shown)) (width D of an image area of the matrix 13) is formed.
i is appropriately set according to the screen size of a liquid crystal display panel using a liquid crystal display color filter, for example, a maximum of 10 to 50 μm), but a black or dark pigment dispersed photoresist, printing ink, or the like, or A pattern is formed by a black or dark dye and a dyeable resin.

As shown in FIGS. 1 (b) and 1 (c),
For example, each pixel R, G, and B each having a rectangular shape (or a mesh shape such as a honeycomb shape) surrounded by the light-shielding black matrix 13 in the shape of a rectangular lattice, and a pattern is formed on each adjacent boundary portion thereof. The light-shielding black matrix 13 constitutes, for example, a rectangular pixel region I, and an outer light-shielding non-pixel region N (of the region N) is formed outside the pixel region I so as to continuously surround the pixel region I. Width n
Is appropriately set according to the screen size of a liquid crystal display panel using a color filter for liquid crystal display.
0 to 5000 μm) is patterned by a black or dark color pigment-dispersed photoresist, a printing ink, or a black or dark color dye and a dyeing resin.

In the first invention of the present invention, the pixel region I is a pixel region substantially used in color liquid crystal display, and the non-pixel region N is a light-shielding region outside the pixel region I. It is the area provided as. Further, the planar appearance shape of the pixel region I is not particularly limited in the present invention and may be an appropriate shape, but as shown in the figure, for example, it may be rectangular (square or rectangular). The shape may be circular, elliptical, triangular, or any other polygonal shape.

The light-shielding non-pixel region N is shown in FIG.
As shown in (c), a black or dark color pigment-dispersed photoresist, a printing ink, or a black or dark color dye is formed in a mesh shape or a cross lattice shape (or a stripe shape (not shown)). And a dyeing resin to form a light shielding pattern 20.

Regarding the colored layer 12 formed in the light-shielding non-pixel region N, the colored transparent layers forming the colored and transparent color pixels (red pixel R, green pixel G, blue pixel B) of the pixel region I. It is formed by using a coloring material having the same composition, the same color, or the same color density as the colored layer 12 having properties.

If necessary, for the colored layer 12 formed in the light-shielding non-pixel region N, colored and transparent color pixels (red pixel R, green pixel G, blue pixel B) of the pixel region I are used. A coloring material having a different composition or different color or different color density from that of the colored layer 12 (for example, but not limited to, for example, red, green, a black or gray color other than blue, or a dye or pigment component with a high content. It is formed using a coloring material having a high light-shielding property of color density or an opaque coloring material.

FIG. 2 is a side sectional view for explaining the color filter for liquid crystal display of the second invention, showing a liquid crystal display panel assembled using the color filter for liquid crystal display of the above-mentioned one embodiment of the first invention. It is an XX partial outline side sectional view explaining.

The color filter for liquid crystal display of the second invention comprises:
A first substrate A described in the conventional example, and an overcoat layer 14 and a transparent electrode film 15 described in the conventional example provided on the colored layer 12 of the color filter for liquid crystal display of the first invention. The two substrates B are overlapped with each other so as to face each other with a space therebetween, and granular transparent bead spacers 3 having a uniform particle diameter of 2r (diameter) are formed in the liquid crystal filled cells 17 formed between the space facing each other. After dispersion-coating a granular body having a shape such as a columnar shape, the liquid crystal L is enclosed and the first substrate A
The peripheral edges of the second substrate B are joined and sealed by the joining sealing material 18 such as an adhesive as described in the conventional example.

As shown in FIG. 2, the light-shielding pattern 20 forming the non-pixel region N formed on the second substrate B.
Is a pattern formed in a mesh shape or a cross lattice shape (or a stripe shape), and the colored layer 12 between the meshes of the light-shielding pattern 20 or between the lattices (of each pixel R, G, B corresponding portion). The upper surface of the colored layer 12) is lower than the upper surface of the colored layer 12 which is coated directly on the pattern 20.

Pitch width Pn of the light-shielding pattern 20
Is preferably equal to or smaller than the pitch width Pi of each color pixel R, G, B, and the width Dn of the image area of the pattern 20 is a liquid crystal display using a liquid crystal display color filter. It is appropriately set depending on the screen size of the panel, but is, for example, 10 to 50 μm at maximum.

For example, in the present invention, the relation between the pitch Pi of the light-shielding black matrix 13 and the pitch Pn of the light-shielding pattern 20 is set to Pi ≧ Pn, and the width Di of the light-shielding black matrix 13 is set. It is appropriate to set the relationship with the width Dn of the light shielding pattern 20 so that Di ≦ Dn.

As shown in FIG. 2, the light-shielding pattern 20 forming the non-pixel region N formed on the second substrate B.
(Pattern pitch Pn, pattern image area width Dn)
Is a pattern formed in a mesh shape or a cross lattice shape (or a stripe shape (not shown)).
However, when it is formed on the transparent substrate 11 from the light-shielding pattern 20 with a uniform film thickness, the colored layer 12 between the meshes or the lattices (the colored layer 12 corresponding to each pixel R, G, B) is formed. The upper surface is lower than the upper surface of the colored layer 12 coated right above the pattern 20.

A transparent bead spacer 3 (maximum particle size 2r has a liquid crystal filling cell 17 formed on the liquid crystal filling cell 17 formed on the opposing inner surface of the first substrate A and the second substrate B which are overlapped with each other with a space between them. It is selected according to the separation distance between the first substrate A and the second substrate B which are included, for example, diameter = 2r
However, when the liquid crystal L is sealed after the transparent beads (granular bodies) made of glass or resin having a uniform particle size of 5 μm or 4 μm to 8 μm are dispersed and applied, one or a plurality of transparent bead spacers 3 Is a low-level portion on the colored layer 12 between the meshes or the lattices of the black matrix 13 in the pixel region I and the colored layer 12 between the meshes or the lattices of the light shielding pattern 20 in the non-pixel region N. The bead spacers 3 so that they are respectively recessed in the upper lower part.
Are dispersed and arranged in a single layer state, and the height difference T (gap) of the transparent bead spacers 3 arranged in the pixel region I and the non-pixel region N is suppressed to about ± 0.5 μm or less. The bead spacers 3 have almost the same height, and the thickness of the liquid crystal layer (the gap between the liquid crystal filled cells 17).
Is, for example, diameter = 2r is 4 μm, 5 μm, 8
When using the bead spacer 3 of μm, 4 ±
It falls within the range of 0.5 μm, 5 ± 0.5 μm, and 8 ± 0.5 μm.

Next, another embodiment of the color filter for liquid crystal display of the first invention will be described in detail with reference to the plan views of FIGS. 3 (a) to 3 (c).

FIG. 3 (a) is a schematic sectional side view of the color filter for liquid crystal display in the XX section of another embodiment of the first invention, and FIG. 3 (b) is a liquid crystal display in another embodiment. 3C is a partial schematic plan view of the color filter for use in FIG.
[FIG. 6] is an overall plan view of a color filter for liquid crystal display in another example.

As shown in FIG. 3 (a), the color filter for liquid crystal display of the other embodiment described above has a pigment-dispersed photoresist, a printing ink and a dyeing property on a transparent substrate 11 such as a glass substrate or a plastic substrate. A large number of color pixels R, G, B (pixel pitch Pi) for color display are regularly arranged by the colored layer 12 formed by a colored pattern formed of a resin, an inorganic material multilayer film, or the like.

Below the colored layer 12, each pixel R,
A black or dark pigment dispersion photoresist or printing ink, or a black or dark dye and a dyeing resin, etc. at the adjacent borders of G and B in the form of a stripe light shielding Black matrix 13 (width Di of the image area) is formed in a pattern, and as shown in FIGS. 3B and 3C, each pixel in a stripe shape surrounded by the light-shielding black matrix 13. For example, a rectangular pixel region I is composed of R, G, and B and the light-shielding black matrix 13 that is pattern-formed on each adjacent boundary portion, and outside the pixel region I, An outer light-shielding non-pixel region N (width n of the region N) which surrounds continuously with this is formed with a black or dark color pigment-dispersed photoresist or printing ink, or a black or dark color dye. Patterned by dyeing resin It is down form.

In another embodiment of the first aspect of the invention, the pixel region I is a pixel region substantially used in color liquid crystal display, and the non-pixel region is outside the pixel region I. This is a region provided for shading. Further, as in the case described above, the planar external shape of the pixel region I is not particularly limited.

In another embodiment of the first invention,
As shown in FIGS. 3A to 3C, the light-shielding non-pixel region N has a mesh type or a cross lattice type (or a stripe type (not shown)) in a black or dark pigment dispersion type photo. A light-shielding pattern 20 is formed of a resist, a printing ink, or a black or dark dye and a dyeing resin.

Regarding the colored layer 12 formed in the light-shielding non-pixel region N, the colored and transparent color pixels (red pixel R, green pixel G, blue pixel) of the pixel region I are similarly to the above-described embodiment. It is formed by using a coloring material having the same composition, the same color or the same color density as the colored transparent coloring layer 12 forming B).

If necessary, for the colored layer 12 formed in the light-shielding non-pixel region N, each colored transparent color pixel (red pixel R, green pixel G, blue pixel B) of the pixel region I is used. A coloring material having a different composition or different color or different color density from that of the colored layer 12 (for example, but not limited to, for example, red, green, a black or gray color other than blue, or a dye or pigment component with a high content. It is formed using a coloring material having a high light-shielding property of color density or an opaque coloring material.

FIG. 4 shows a second embodiment assembled using the color filter for liquid crystal display of another embodiment of the first invention.
FIG. 7 is a schematic side sectional view of a color filter for liquid crystal display and a color liquid crystal display panel of another embodiment of the invention, taken along line XX.

A liquid crystal display color filter according to another embodiment of the second invention comprises a first substrate A described in the conventional example,
A second substrate B constituted by providing the overcoat layer 14 and the transparent electrode film 15 described in the conventional example on the colored layer 12 of the color filter for liquid crystal display in another embodiment of the first invention shown in FIG. And are overlapped with each other while being spaced apart from each other, and the transparent bead spacers 3 having a uniform particle diameter of the average particle diameter 2r are dispersed and applied in the liquid crystal filled cells 17 formed between the spaced opposite surfaces, and then the liquid crystal L is sealed, The peripheral edges of the first substrate A and the second substrate B are bonded and sealed with a bonding sealing material 18 such as an adhesive as described in the conventional example.

As shown in FIG. 4, the light-shielding pattern 20 forming the non-pixel region N formed on the second substrate B is formed.
(Pattern pitch Pn, pattern image area width Dn)
Is a pattern formed in a mesh shape or a cross lattice shape (or a stripe shape (not shown)).
However, when it is formed on the transparent substrate 11 from the light-shielding pattern 20 with a uniform film thickness, the colored layer 12 between the meshes or the lattices (the colored layer 12 corresponding to each pixel R, G, B) is formed. The upper surface is lower than the upper surface of the colored layer 12 coated right above the pattern 20.

When the liquid crystal L is sealed after the transparent bead spacers 3 are dispersed and applied to the liquid crystal sealing cell 17 formed on the opposing inner surfaces of the first substrate A and the second substrate B which are spaced apart from each other and face each other, the liquid crystal sealing cell 17 is dispersed. One to a plurality of transparent bead spacers 3 are provided in the pixel region I and the black matrix 13.
The light-shielding patterns 20 in the non-pixel region N are dispersed and arranged in a single layer so as to be recessed in the lower portions on the colored layer 12 between the meshes or the lattices, respectively. The height difference T (gap) of the transparent bead spacers 3 arranged at and is suppressed to about ± 0.5 μm or less, and the bead spacers 3 maintain substantially the same height and the thickness of the liquid crystal layer ( Liquid crystal filled cell 1
7) are, for example, 4 μm and 5 μm in diameter,
When using 8 μm bead spacers 3, each 4
It falls within the ranges of ± 0.5 μm, 5 ± 0.5 μm, and 8 ± 0.5 μm.

[0056]

In the color filter for liquid crystal display according to the first aspect of the present invention, the light-shielding non-pixel region N is formed as the light-shielding pattern 20 in a mesh shape, a cross lattice shape, or a parallel lattice shape on the transparent substrate 11. One embodiment of the liquid crystal display color filter of the first invention, or the liquid crystal display color filter of the second invention in which the transparent bead spacer 3 is applied to the liquid crystal display color filter of the first invention (see FIG. 2).
Alternatively, as shown in another embodiment (see FIG. 4), the mesh-like or cross-lattice (or stripe-like or parallel lattice-like not shown) of the light-shielding pattern 20 which constitutes the non-pixel region N Alternatively, the upper surface of the colored layer 12 between the lattices is
Colored layer 1 between meshes or meshes of a mesh or cross lattice (or a stripe or parallel lattice (not shown)) of the black matrix 13 formed in the pixel region I.
2 It will hold the same surface as the upper surface.

Therefore, the transparent bead spacers 3 having a uniform particle size dispersedly arranged on the colored layer 12 of the color filter for liquid crystal display of the first invention or the second invention are the light-shielding black matrix formed in the pixel region I. 13 and the above-mentioned colored layer 1 for holding the same surface in the mesh-like or lattice-corresponding portions of the light-shielding pattern 20 formed in the non-pixel region N, respectively.
2, the transparent peripheral surface of the transparent bead spacers 3 keeps the same height in the horizontal direction to eliminate the height difference T at the boundary between the pixel region I and the non-pixel region N. First
When the second substrate B composed of the color filter for liquid crystal display of the invention or the second invention and the first substrate A are overlapped with each other while being spaced apart from each other, the two substrates A and B are spaced parallel to each other and faced each other. For example, the second substrate A (transparent substrate 1
The deformation of 1) can be avoided, and when used as a liquid crystal display panel, display defects such as white spots that are likely to occur at the boundary between the pixel region I and the non-pixel region N can be eliminated, and the image quality is clear and has better image quality. A liquid crystal color display panel can be obtained.

[0058]

The color filter for liquid crystal display of the present invention comprises:
A color filter used in a bead-dispersed liquid crystal display panel, which can eliminate a height difference of a bead spacer which is likely to occur at a boundary portion between a pixel region I and a non-pixel region N, and does not cause display defects such as white spots. , Is effective as a color filter for producing a liquid crystal display panel which is clear and has better image quality.

[Brief description of drawings]

FIG. 1A is a sectional view taken along line XX in an embodiment of the liquid crystal display color filter of the first invention, and FIG. 1B is a partial plan view of the embodiment of the liquid crystal color filter of the first invention. FIG. 3C is an overall plan view of an embodiment of the liquid crystal color filter of the first invention.

FIG. 2 illustrates a liquid crystal display of an embodiment of the first invention for explaining a color filter for liquid crystal display of an embodiment of the second invention in which transparent bead spacers are applied to the color filter for liquid crystal display of the first invention. FIG. 6 is a side sectional view of an XX portion of a color liquid crystal display panel assembled using a color filter for use in a display.

FIG. 3A is a sectional view taken along line XX in another embodiment of the color filter for liquid crystal display of the first invention, and FIG.
FIG. 6 is a partial plan view of another embodiment of the liquid crystal color filter of the first invention, and (c) is an overall plan view of another embodiment of the liquid crystal color filter of the first invention.

FIG. 4 is another embodiment of the first invention for explaining a liquid crystal display color filter of another embodiment of the second invention in which transparent bead spacers are applied to the liquid crystal display color filter of the other embodiment of the first invention. FIG. 6 is a sectional view of a color liquid crystal display panel assembled using the color filter for liquid crystal display of FIG.

FIG. 5 illustrates a liquid crystal color display panel assembled using a conventional color filter for liquid crystal display.
It is a -X partial side sectional view.

FIG. 6A is a sectional view taken along line XX for explaining a conventional liquid crystal display color filter, and FIG. 6B is a partial plan view for explaining a conventional liquid crystal display color filter;
(C) is an overall plan view for explaining a conventional liquid crystal color filter.

FIG. 7 is a sectional view taken along line XX of a liquid crystal color display panel assembled by using another conventional color filter for liquid crystal display.

FIG. 8A is a cross-sectional view of another conventional liquid crystal display color filter taken along line XX, and FIG. 8B is a partial plan view of another conventional liquid crystal color filter; FIG. 7C is an overall plan view of another conventional liquid crystal color filter.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Transparent substrate 2 ... Transparent electrode film 3 ... Bead spacer 11 ... Transparent substrate 12 ... Coloring layer 13 ... Black matrix 14 ... Overcoat layer 15 ... Transparent electrode film 16 ... Light-shielding layer 17 ... Liquid crystal encapsulation cell 18 ... Bonding sealant 20 ... Light-shielding pattern A ... First substrate B ... Second substrate L ... Liquid crystal I ... Pixel area N ... Non-pixel area W ... White spot occurrence area R ... Red pixel G ... Green pixel B ... Blue pixel T ... Height difference

Claims (7)

[Claims] 1. A large number of color pixels R, G, B for color display by a colored layer 12 are regularly arranged on a transparent substrate 11, and a light-shielding black matrix 13 is provided at an adjacent boundary of each pixel. A liquid crystal display color filter for a bead-dispersed color liquid crystal display panel, comprising a formed pixel region I and an outer light-shielding non-pixel region N continuously provided outside the pixel region I, A liquid crystal display in which the light-shielding non-pixel region N is formed as a light-shielding pattern 20 having a mesh shape, a cross lattice shape, a parallel lattice shape, or the like, and the colored layer 12 is formed in the light-shielding non-pixel region N. Color filter. 2. A liquid crystal display characterized in that a transparent bead spacer 3 is arranged on the colored layer 12 in a portion corresponding to meshes or lattices of the light shielding pattern 20 in the color filter for liquid crystal display according to claim 1. Color filter. 3. The colored layer 12 formed in the light-shielding non-pixel region N has the same composition or the same color as the colored layer 12 forming each color pixel R, G, B for color display of the pixel region I. The color filter for liquid crystal display according to claim 1, which is formed of a coloring material having the same color density. 4. The colored layer 12 formed in the light-shielding non-pixel region N has a different composition or a different color from the colored layer 12 forming each color pixel R, G, B for color display of the pixel region I. The color filter for liquid crystal display according to claim 1, which is formed of a coloring material having a different color density. 5. The relationship between the pitch Pi of the light blocking black matrix 13 of the pixel area I and the pitch Pn of the light blocking pattern 20 of the non-pixel area N is Pi ≧ Pn, and the light blocking black of the pixel area I is set. The color filter for liquid crystal display according to claim 1, wherein the relationship between the width Di of the matrix 13 and the width Dn of the light-shielding pattern 20 in the non-pixel region N is Di ≦ Dn. 6. The pitch Pi of each color pixel R, G, B in a pixel region I formed on the transparent substrate is 60 to 300 μ at maximum.
m, and the width Di of the light-shielding black matrix 13 formed at the adjacent boundary portion of each pixel is 10 at maximum.
50 μm, and the width n of the light-shielding non-pixel region N is 50
The color filter for liquid crystal display according to claim 1, which has a thickness of 0 to 5000 μm. 7. An overcoat layer 1 on the colored layer 12.
The color filter for liquid crystal display according to claim 1, wherein the color filter 4 or the overcoat layer 14 and the transparent electrode film 15 are provided.