KR100781823B1 - Color Filter - Google Patents

Abstract

The present invention provides a color filter which eliminates the need for a front scattering plate, eliminates parallax (a phenomenon that makes images appear blurred) at high luminance, and prevents deterioration of color characteristics, thereby realizing excellent color characteristics.

In the color filter which contains the board | substrate and the coloring layer which consists of a coloring pattern of various colors, the said subject is solved by containing light-scattering microparticles | fine-particles and the coloring material for correction of a color characteristic.

Color filter

Description

Color Filter

1 is a schematic longitudinal cross-sectional view showing an example of a color filter according to a first embodiment of the present invention.

2 is a schematic longitudinal sectional view showing an example of a color filter according to a second embodiment of the present invention.

3 is a schematic longitudinal cross-sectional view showing an example of a color filter according to a third embodiment of the present invention.

4 is a schematic longitudinal cross-sectional view showing an example of a color filter according to a fourth embodiment of the present invention.

5 is a schematic longitudinal cross-sectional view showing an example of a color filter according to a fifth embodiment of the present invention.

6 is a schematic longitudinal cross-sectional view showing an example of a color filter according to a sixth embodiment of the present invention.

7 is a schematic longitudinal cross-sectional view showing an example of a reflective color liquid crystal display device using the color filter of the present invention.

8 is a schematic longitudinal cross-sectional view showing another example of a reflective color liquid crystal display device using the color filter of the present invention.                 

It is a figure which shows an example of the reflection spectral chromaticity coordinate in the case of adding a red pigment to a color filter.

It is a figure which shows an example of the reflection spectral chromaticity coordinate in the case where a blue pigment is added to a color filter.

It is a figure which shows an example of the reflection spectral chromaticity coordinate in the case of adding a purple pigment to a color filter.

It is a figure which shows an example of the reflection spectral chromaticity coordinate in the case where a color material is added to a color filter.

It is a case where it does not contain the coloring component which reduces a color characteristic in a color filter, and is a figure which shows an example of the reflection spectral chromaticity coordinate.

It is a case where it does not contain the coloring component which reduces a color characteristic in a color filter, and is a figure which shows an example of the reflection spectral chromaticity coordinate.

It is a case where it does not contain the coloring component which reduces a color characteristic in a color filter, and is a figure which shows an example of the reflection spectral chromaticity coordinate in the case where color correction is performed by adding a color material.

The present invention relates to a color filter, particularly a color filter for a reflective or translucent liquid crystal display device.                         

Recently, a color liquid crystal display device has attracted attention as a flat display, and this color liquid crystal display device can be divided into a reflection type and a transmission type. Reflective color liquid crystal display devices are, for example, colored layers of various colors (usually three primary colors of red (R), green (G), and blue (B)) (if necessary, plastic matrices and planarization layers also And a TFT array substrate having a thin film transistor (TFT element) and a reflective electrode layer made of metal such as aluminum and a thin film transistor (TFT element) face each other with a predetermined gap. At the same time as the layer is formed, a phase difference plate, a polarizing plate, and a front scattering plate are provided on the color filter (observer side), which has a light scattering function, and is suitable for light incident on the reflective liquid crystal display device. It can be installed to produce scattering and ensure sufficient visibility.

However, in the conventional reflective color liquid crystal display device, there exists a problem of causing the brightness fall and the color characteristic fall of a liquid crystal display device by presence of a front-scattering plate. This was due to the color adhesion of the forward scattering plate. Moreover, there also existed a problem that parallax (phenomena which an image is blurred) generate | occur | produces by presence of a forward scattering plate. The decrease in brightness described above was an unavoidable problem in the conventional reflective color liquid crystal display device in which the front scattering plate is disposed on the color filter (observer side).

For such a problem, it is considered to provide light scattering property to the color filter itself by incorporating light scattering fine particles into the color filter. As a result, since the forward scattering plate may be unnecessary, the problem caused by the presence of the forward scattering plate could be solved to some extent.                         

However, although light scattering fine particles can give sufficient light scattering function, the thickness of the light scattering layer may be thick as a result. For example, although a conventional protective film etc. have a film thickness of 2 micrometers or less, in the case of a light scattering function film, it may be a film thickness of about 0.5-20 micrometers. In this case, if there is a coloring component in the composition forming the layer that at least adversely affects the color characteristics of the color filter, the thicker the film, the more the coloring is emphasized. Here, as a coloring component, a resin component, a polymerization initiator, etc. can be considered, and these are known to have pale yellow to red color regardless of thermosetting type or photocuring type.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and does not require a forward scattering plate, and does not require parallax (a phenomenon in which images appear faint) at high brightness, and prevents deterioration of color characteristics, thereby making it possible to realize excellent color characteristics. It is an object to provide a color filter.

In order to achieve this object, the present invention is characterized in that the color filter includes at least a colored layer comprising a substrate and a colored pattern of various colors, the light scattering fine particles and a color material for correcting color characteristics, characterized by Provide color filters.

Here, it is preferable that the color filter has a layer containing both the light scattering fine particles and the color material. And it is preferable that haze value exists in the range of 10-90, and total light transmittance is 30% or more.                         

According to a first embodiment of the present invention, the substrate is transparent, and further includes a transparent electrode layer laminated on the outer side of the colored layer, wherein the light scattering fine particles are formed between the transparent substrate and the colored layer. It is a color filter contained as a scattering layer.

A second embodiment as a preferred embodiment of the present invention is a color filter in which the substrate is transparent, has a transparent electrode layer laminated on the outside of the colored layer, and the light scattering fine particles are contained in the colored layer.

According to a third embodiment of the present invention, the substrate is transparent, and further includes a planarization layer laminated on the outside of the colored layer and a transparent electrode layer laminated on the outside of the planarization layer, wherein the light scattering fine particles are It is a color filter contained in a planarization layer.

A fourth embodiment as a preferred embodiment of the present invention further has a drive element layer stacked on the substrate and a reflective electrode layer stacked on the drive element layer between the substrate and the colored layer, wherein the light scattering properties The fine particles are a color filter contained as a light scattering layer between the reflective electrode layer and the colored layer.

A fifth embodiment as a preferred embodiment of the present invention further has a drive element layer stacked on the substrate and a reflective electrode layer stacked on the drive element layer between the substrate and the colored layer, wherein the light scattering properties The fine particles are color filters contained in the colored layer.

A sixth embodiment as a preferred embodiment of the present invention is a planarization layer laminated on the outer side of the colored layer, a drive element layer laminated on the substrate between the substrate and the colored layer, and on the drive element layer It is a color filter which further has the reflective electrode layer laminated | stacked on the said light scattering microparticles | fine-particles contained in the said planarization layer.

According to a seventh embodiment of the present invention, the substrate is transparent, and further includes a transparent electrode layer laminated on the outer side of the colored layer, wherein the light scattering fine particles are disposed between the transparent substrate and the colored layer. It is a color filter contained as a thing and containing the said coloring pattern of at least 1 color or more.

An eighth embodiment as a preferred embodiment of the present invention further comprises a planarization layer in which the substrate is transparent and laminated on the outer side of the colored layer, and a transparent electrode layer laminated on the outer side of the planarization layer, wherein the light scattering fine particles Is a color filter contained in the planarization layer and the coloring pattern of at least one color.

According to a ninth embodiment of the present invention, the substrate is transparent, and further includes a planarization layer stacked on the outer side of the colored layer and a transparent electrode layer stacked on the outer side of the planarization layer. It is a color filter contained as a light scattering layer between the said transparent substrate and the said colored layer, and also contained in the said planarization layer.

A tenth embodiment as a preferred embodiment of the present invention further has a drive element layer stacked on the substrate, and a reflective electrode layer stacked on the drive element layer, between the substrate and the colored layer. It is a color filter which scattering microparticles | fine-particles contain as a light scattering layer between the said reflection electrode layer and the said coloring layer, and are also contained in the said coloring pattern of at least 1 color or more.

An eleventh embodiment as a preferred embodiment of the present invention comprises a planarization layer laminated on the outer side of the colored layer, a drive element layer laminated on the substrate between the substrate and the colored layer, and the drive element. It is a color filter which has the reflection electrode layer laminated | stacked on the layer, and the said light-scattering microparticles | fine-particles are contained in the said planarization layer, and are also contained in the said coloring pattern of at least 1 color or more.

A twelfth embodiment as a preferred embodiment of the present invention comprises a planarization layer laminated on the outer side of the colored layer, a drive element layer laminated on the substrate between the substrate and the colored layer, and the drive element. It is a color filter which further has a reflection electrode layer laminated | stacked on the layer, and the said light scattering microparticles | fine-particles are contained as a light scattering layer between the said reflection electrode layer and the said coloring layer, and are also contained in the said planarization layer.

In addition, according to another preferred embodiment of the present invention, the color filter of any one of the first to the third, the drive element layer, the reflective electrode layer and the transparent electrode layer are sequentially laminated on the transparent substrate, the light scattering fine particles A liquid crystal display device in which a liquid crystal layer is sandwiched by an electrode substrate contained as a light scattering layer between the reflective electrode layer and the transparent electrode layer is provided.

According to another preferred embodiment of the present invention, the transparent filter layer is laminated on the color filter of any one of the fourth to sixth embodiments and the transparent substrate, and light scattering fine particles are interposed between the transparent substrate and the transparent electrode layer. A liquid crystal display device in which a liquid crystal layer is sandwiched by a display side substrate contained as a light scattering layer is provided.

Hereinafter, the color filter of this invention is demonstrated concretely.

Color filter

The color filter of this invention is a color filter for reflective or semi-transmissive liquid crystal display devices, and contains the board | substrate and the colored layer which consists of a coloring pattern of various colors at least. The color filter contains light scattering fine particles and a color material for correcting color characteristics. Thus, by containing light scattering microparticles | fine-particles in a color filter, a light scattering function can be provided to the color filter itself. For this reason, it may become unnecessary to arrange | position and install a front scattering plate on a color filter (observer side). In addition, by including the color material for the correction of the color characteristics in the color filter, it is possible to reliably compensate for the deterioration of the color characteristics due to the addition of the light scattering fine particles, thereby realizing excellent color characteristics. Therefore, it becomes possible to realize a high-quality liquid crystal display device in which the parallax (phenomena in which the image is blurred) by adding the conventional front scattering plate and the deterioration in luminance and color characteristics are eliminated.

Moreover, by containing a color material, a desired color characteristic can be provided and it can respond easily to various spectroscopy methods. Moreover, since the material suitable for manufacturing can be widely selected without being bound to colorability according to the film thickness, there is an advantage of improving productivity.

In addition, the color filter of the present invention is preferably configured to be used together with the front scattering plate. Also in this case, since the degradation of the luminance and color characteristics can be reliably compensated for by the addition of the front scattering plate by the color characteristic correction of the color filter itself, the reflective color liquid crystal display manufactured by a process different from the production of color filters. Also in the apparatus, the display image is high in luminance and excellent in color characteristics.

The layer containing the light scattering fine particles and the color material for correcting the color characteristics is not particularly limited, but may be contained in at least one layer in each color filter. The light scattering fine particles and / or the colorant may be contained in two or more layers.

According to a preferred embodiment of the present invention, the light scattering fine particles and the colorant contain both layers. Since it is possible to perform correction of light scattering property and color characteristic by one layer by this, since it can form in one process, it is preferable at the point of productivity which is good and can easily control a spectral characteristic.

(a) Substrate

Although it does not specifically limit as a board | substrate in this invention, In the case of the color filter of the type arrange | positioned at the observer side with respect to a liquid crystal layer in a reflective color liquid crystal display device, it is necessary to be transparent. In the case of the color filter of the type disposed on the observer side and the reflective layer with respect to the liquid crystal layer in the reflective color liquid crystal display device, the substrate does not necessarily need to be transparent.

(b) Colored layer

The colored layer in this invention consists of colored patterns of various colors. As a coloring pattern of various colors, it is common to comprise with a red coloring pattern, a green coloring pattern, and a blue coloring pattern. Such a coloring pattern can be formed by a well-known pigment dispersion method, a dyeing method, an electrodeposition method, etc. Moreover, each coloring pattern can also employ | adopt stripe type, mosaic type, triangle type, 4-pixel arrangement type, etc. It is possible to, but is not particularly limited.

Furthermore, the color filter of this invention may have a black matrix so that it may be located between each coloring pattern which comprises a colored layer or a light-scattering colored layer. In this case, the black matrix can be formed of a metal such as light blocking resin or chromium.

(C) light scattering fine particles

The light scattering fine particles in the present invention are fine particles having a light scattering action, and preferred examples thereof include inorganic materials such as silicon oxide, aluminum oxide and barium sulfate, acrylic resins, divinylbenzene resins, benzoguanamine resins and styrene resins. And fine particles such as melamine resins, acrylic styrene resins, polycarbonate resins, polyethylene resins, polyvinyl chloride resins and the like or organic compounds such as these two or more kinds thereof. Among these, melamine type resin, benzoguanamine type resin, its mixed resin, and copolymer are preferable at the point of transparency and durability. Such fine particles have an average particle diameter of 0.1 to 5.0 µm, preferably 0.1 to 4.0 µm, more preferably 0.1 to 2.0 µm, and when the average particle diameter is less than 0.1 µm, most scattering effects are not obtained, and light The scattering fine particles are preferably spherical in order to enhance the scattering effect.

(D) Color materials for correction of color characteristics

Although it does not specifically limit as a color material for correction of the color characteristic in this invention, The coloring material normally used, such as an organic pigment, an inorganic pigment, and dye, can be used. Moreover, you may use combining organic or inorganic pigment and dye. In addition, what is necessary is just to determine suitably the addition amount of a color material so that a desired color characteristic may be implement | achieved, and it is not specifically limited.

Preferred examples of the organic pigments include the following. Blue pigments include CIPigment Blue 15, CIPigment Blue 15: 3, CIPigment Blue 15: 4, CIPigment Blue 15: 6, CIPigment Blue 22, CIPigment Blue 60, and CIPigment Blue 64. Violet pigments include CIPigment Violet 19, CIPigment Violet 23, CIPigment Violet 29, CIPigment Violet 30, CIPigment Violet 31, CIPigment Violet 36, CIPigment Violet 37, CIPigment Violet 38, CIPigment Violet 40, CIPigment Violet 42, CIPigment Violet 47, CIPigment Violet 48, CIPigment Violet 49, CIPigment Violet 50, and the like. Iii) As color pigments, CIPigment Green 7, CIPigment Green lO, CIPigment Green 36, etc. iv) As the red pigment, CIPigment Red 5, CIPigment Red 9, CIPigment Red lO, CIPigment Red 17, CIPigment Red 23, CIPigment Red 88, CIPigment Red 97, CIPigment Red l19, CIPigment Red l22 , CIPigment Red 123, CIPigment Red 144, CIPigment Red 149, CIPigment Red 155, CIPigment Red 166, CIPigment Red 168, CI Pigment Red 177, CIPigment Red 179, CIPigment Red 180, CIPigment Red 190, CIPigment Red 192, CIPigment Red 198, CIPigment Red 207, CIPigment Red 209, CIPigment Red 215, CIPigment Red 216, CI Pigment Red 217, CIPigment Red 220, CIPigment Red 223, CIPigment Red 224, CIPigment Red 226, CIPigment Red 227, CIPigment Red 228, CIPigment Red 240, CIPigment Red 250, CIPigment Red 254, CI Pigment Red 48: 1, CIPigment Red 48: 2, CI Pigment Red 48: 3, CIPigment Red 48: 4, CIPigment Red 52: 2, and the like. V) Orange pigments include CIPigment Orange 31, CIPigment Orange 36, CIPigment Orange 43, CIPigment Orange 51, CIPigment Orange 55, CI Pigment Orange 59, CI Pigment Orange 61, CIPigment Orange 71, vi) As the yellow pigment, CIPigment Yellow 13, CIPigment Yellow 3, CIPigment Yellow 12, CIPigment Yellow 13, CIPigment Yellow 14, CIPigment Yellow 16, CIPigment Yellow 17, C, I. Pigment Yellow 20, CI Pigment Yellow 24, CIPigment Yellow 55, CIPigment Yellow 60, CIPigment Yellow 65, CIPigment Yellow 73, CIPigment Yellow 74, CIPigment Yellow 81, CIPigment Yellow 83, CIPigment Yellow 86, CIPigment Yellow 93, CI Pigment Yellow 95, CIPigment Yellow 97, CIPigment Yellow 98, CIPigment Yellow 99, CIPigment Yellow LOO, CIPigment Yellow 101, CIPigment Yellow 104, CIPigment Yellow lO6, CIPigment Yellow 108, CIPigment Yellow 109, CI Pigment Yellow llO, CIPigment Yellow l13, CIPigment Yellow 114, CIPig ment Yellow 116, CIPigment Yellow 117, CIPigment Yellow 119, CIPigment Yellow 120, CIPigment Yellow 125, CIPigment Yellow 126, CIPigment Yellow 127, CIPigment Yellow 128, CIPigment Yellow 129, CIPigment Yellow 137, CI Pigment Yellow 138, CIPigment Yellow 139, CIPigment Yellow 147, CIPigment Yellow 148, CIPigment Yellow 150, CIPigment Yellow 151, CIPigment Yellow 152, CIPigment Yellow 153, CIPigment Yellow 154, CIPigment Yellow 156, CI Pigment Yellow 166, CIPigment Yellow 168, CIPigment Yellow 175, and the like. (Iii) CIPigment Brown 23, CIPigment Brown 25, CIPigment Brown 26, and the like. Can be mentioned.

Preferred examples of the inorganic pigments include the following. 1) As the white pigment, zinc sulfate, zincated, barium sulfate, barium carbonate, calcium carbonate, lead white, clay, talc, silicon oxide, zinc sulfide, titanium oxide, lead titanate, and the like. (Iii) Yellow lead, yellow lead, zinc sulfur, barium chromium, etc.) i) Orange pigment, red-gut wax, chromium vermilion, etc., i) Red pigment, bengar, podium, etc., i) Purple pigment. Examples of cobalt and manganese include (iii) blue pigments, blue-green, ultramarine, and the like. (Iii) Green pigments include chromium green, chromium oxide, cobalt green, and the like. You may use it.

Preferred examples of the dye include azo dyes, phthalocyanine dyes, anthraquinone dyes, methine dyes, oxazine dyes, carbonium dyes, quinoneimine dyes, benzoquinone dyes, naphthoquinone dyes, and triphenylmethane. Dyes, indigoide dyes, perinone dyes, naphthalimide dyes, quinoline dyes, and the dye-containing metal complex salt dyes.

In the present invention, the layer containing the colorant is not particularly limited, but may be contained in any layer in the color filter. In particular, when the light scattering fine particles are contained in the colored layer, the light scattering fine particles are preferably contained in the colored layer, and in the case of using the light scattering layer or the light scattering planarization layer, the light scattering layer or the light scattering planarization layer is contained. It is preferable to make it.

Preferred embodiments of the color filter of the present invention include the following first to twelfth embodiments, but the present invention is not limited thereto.

Color filter according to the first to sixth embodiments

The color filter according to the first to sixth embodiments of the present invention is a form in which light scattering fine particles are contained in only one layer in the color filter. Among these aspects, the color filters according to the first to third embodiments are color filters of the type disposed on the observer side with respect to the liquid crystal layer in the reflective color liquid crystal display device. The color filters according to the fourth to sixth embodiments are color filters of the type disposed on the opposite side to the observer side with respect to the liquid crystal layer in the reflective color liquid crystal display device.

Color filter by the first embodiment

Figure 1 shows a schematic longitudinal cross-sectional view of a color filter according to a first embodiment of the present invention. The color filter 1 shown in FIG. 1 includes a transparent substrate 2, a light scattering layer 3 provided on the transparent substrate 2, a colored layer 4 laminated on the light scattering layer 3, The transparent electrode layer 5 is provided, and the colored layer 4 is comprised from the red coloring pattern 4R, the green coloring pattern 4G, and the blue coloring pattern 4B.

As the transparent substrate 2 constituting the color filter 1, a transparent rigid material having no plasticity such as quartz glass, Pyrex glass, or synthetic quartz plate, or a transparent plastic film having a plasticity such as a transparent resin film or an optical resin plate Flexible materials can be used.

The light scattering layer 3 constituting the color filter 1 is used to ensure adequate visibility by generating appropriate scattering of light incident on the reflective liquid crystal display device, and disperse the light scattering fine particles in the light transmitting resin.

Examples of the light-transmissive resin include acrylic resins, epoxy resins, polyvinyl alcohol resins, polyimide resins, vinyl ether resins, and the like. The refractive index, the transparent substrate 2 and the colored layer 4 In consideration of adhesiveness, it may be used alone or as a mixture of two or more thereof.

In addition, as the light scattering fine particles, those mentioned in the above-mentioned (c) can be used.The content of the fine particles in the light scattering layer 3 is 0.5 to 70% by weight, preferably 1.0 to 50% by weight. It is a range, and the thickness of the light scattering layer 3 is 0.5-20 micrometers, Preferably it is about 1.0-10 micrometers.

Here, in order to make the intensity of the scattered light by the light scattering layer 3 sufficient, it is necessary to make haze value (haze value = (diffusion light transmittance) / (total light transmittance) x 100) high. In order to enable a high haze value (high haze), it is necessary to increase the particle concentration and the thickness of the light scattering layer, but at this time, it is not preferable to lower the total light transmittance and the diffuse light transmittance. For example, in the case of using known titanium oxide or calcium carbonate as the general fine particles, when the fine particle concentration or the thickness of the light scattering layer is increased, the light blocking property of the particles is expressed, and the total light transmittance is significantly reduced. In the color filter 1 of this invention, haze value is 10-90, Preferably it is 25-80, More preferably, 30-90 by making the microparticles | fine-particles used for the light scattering layer 3 into the above-mentioned material. It is possible to make the total light transmittance of 30% or more and diffused light transmittance of 10% or more in the range of 70. In the present invention, the haze value is measured using a direct reading haze meter manufactured by Dongyang Seiki Co., Ltd .. In the method using the forward scattering plate, the parallax (phenomena in which the image appears faint) is emphasized as the haze value increases, but in the present invention, the color filter contains a light scattering layer so that even when the haze is high, the parallax does not occur. .

Here, the light scattering layer 3 contains a color material for correcting color characteristics in addition to the light scattering fine particles. Thereby, coloring is prevented effectively by addition of light-scattering microparticles | fine-particles. As a color material for the correction of a color characteristic, the thing enumerated in (d) mentioned above can be used.

In other words, in this embodiment, the color material for correcting the color characteristics may be included in layers other than the light scattering layer 3.

The colored layer 4 can be formed by a known pigment dispersion method, a dyeing method, an electrodeposition method, or the like, and each colored pattern (4R, 4G, 4B) can also be formed into a strip, a mosaic, a triangle, and a four pixel arrangement. And the like are not particularly limited.

In addition, the transparent electrode layer 5 constituting the color filter 1 may be formed by sputtering, vacuum deposition, CVD using indium tin oxide (ITO), zinc oxide (ZnO), tin oxide (SnO), and the like. It can form by a general film formation method, such as a method. The thickness of such a transparent electrode layer 5 is 0.01-1 micrometer, Preferably it is about 0.03-0.5 micrometer.

Since the color filter 1 can reliably prevent color adhesion of the light scattering layer 3 by color characteristic correction by the color material, the reflective color liquid crystal display device manufactured by a separate process using the color filter 1. In addition, the color characteristic accompanying light scattering hardly occurs, and since the optical filter has a light scattering layer 3 in the color filter 1, the conventional reflective color liquid crystal display on the color filter (observer side). It is not necessary to arrange | position the front scattering plate used by the apparatus, and the high brightness reflective color liquid crystal display device is attained. Moreover, the adhesiveness of the transparent substrate 2 and the colored layer 4 can be made higher according to the light scattering layer 3.

Color filter according to the second embodiment

Figure 2 shows a schematic longitudinal cross-sectional view of a color filter according to a second embodiment of the present invention. The color filter 11 shown in FIG. 2 is the transparent substrate 12, the light-scattering colored layer 14 provided on this transparent substrate 12, and the transparent electrode layer 15 provided on this light-scattering colored layer 14. ), And the light scattering colored layer 14 is composed of a red colored pattern 14R, a green colored pattern 14G and a blue colored pattern 14B.                     

Since the transparent substrate 12 and the transparent electrode layer 15 constituting the color filter 11 are the same as the transparent substrate 2 and the transparent electrode layer 5 in the color filter 1 described above, description thereof is omitted. .

The light scattering colored layer 14 constituting the color filter 11 has the same function as the colored layer in the conventional reflective color liquid crystal display device, and at the same time generates a suitable scattering of light incident on the reflective liquid crystal display device. To ensure sufficient visibility.

This light scattering colored layer 14 is obtained by dispersing light scattering fine particles in a colored layer formed by a known pigment dispersion method, a dyeing method, an electrodeposition method, or the like. As the light scattering fine particles, the fine particles listed in the above-mentioned (c) can be used. Content in the light-scattering colored layer 14 of such microparticles | fine-particles is 0.5-70 weight%, Preferably it is the range of 1.0-50 weight%, and the thickness of the light-scattering colored layer 14 is 0.05-15 micrometers, Preferably Is 0.5-15 micrometers, More preferably, it can set in the range of 0.5-10 micrometers.

Also in this color filter 11, haze value is 10-90, Preferably it is 25-80, More preferably, it is 30-70 by using the microparticles | fine-particles used for the light-scattering colored layer 14 as the above-mentioned material. Range, total light transmittance can be 30% or more, and diffused light transmittance can be 10% or more. In the method using the forward scattering plate, the parallax (phenomena in which the image appears faint) is emphasized as the head value increases, but the parallax does not occur even in the case of high haze by including the light scattering layer in the color filter.                     

Here, the light scattering colored layer 14 further contains a color material for correcting color characteristics in the light scattering fine particles. Thereby, coloring is prevented effectively by addition of light-scattering microparticles | fine-particles. As the colorant for the correction of color characteristics, those listed in the above-mentioned (d) can be used.

In addition, in this embodiment, the color material for correction of color characteristics may be comprised in layers other than the light scattering colored layer 14.

In addition, the colored patterns 14R, 14G, and 14B of the light scattering colored layer 14 are not particularly limited, such as strips, mosaics, triangles, and four pixel arrangements. Such a color filter 11 can reliably prevent deterioration of color characteristics of the light scattering colored layer 14 in which light scattering fine particles are dispersed, by color characteristic correction by a color material in the manufacturing step of the light dissipating colored layer 14. In addition, it is possible to delicately control the degree of light scattering for each color by adjusting the fine particle content. Therefore, also in the reflective color liquid crystal display device manufactured by the separate process using the color filter 11, the fall of the color characteristic by light scattering hardly arises, and light scattering property in the color filter 11 is carried out. Since it has the coloring layer 14, it is unnecessary to arrange | position the front-scattering plate used by the conventional reflective color liquid crystal display device on the color filter (observer side), and the high brightness reflective color liquid crystal display device becomes possible.

Color filter according to the third embodiment

3 shows a schematic longitudinal sectional view of a color filter according to a third embodiment of the invention. The color filter 21 shown in FIG. 3 has the transparent substrate 22, the coloring layer 24 laminated | stacked on this transparent substrate 22, the light-scattering planarization layer 26, and the transparent electrode layer 25, The colored layer 24 is composed of a red colored pattern 24R, a green colored pattern 24G, and a blue colored pattern 24B.

The transparent substrate 22, the colored layer 24, and the transparent electrode layer 25 constituting the color filter 21 include the transparent substrate 2, the colored layer 4, and the color filter 1. It is the same form as the transparent substrate layer 5, and description is abbreviate | omitted here.

The light scattering planarization layer 26 constituting the color filter 21 eliminates minute irregularities on the surface of the color layer 24 to form a flat surface for forming a transparent electrode layer and simultaneously enters a reflective liquid crystal display device. This is to ensure adequate visibility by creating a moderate amount of scattering in one light.

This light-scattering planarization layer 26 disperse | distributes light-scattering microparticles | fine-particles, for example in resin, such as an acrylic resin, an epoxy resin, a vinyl ether resin, a polyimide resin, and a propyl resin. As the light scattering fine particles, the fine particles listed in the above-mentioned (c) can be used. The content of the fine particles in the light scattering planarization layer 26 is in the range of 0.5 to 70% by weight, preferably 1.0 to 50% by weight, and the thickness of the light scattering planarization layer 26 is 0.5 to 20 µm, preferably It is about 1.0-10 micrometers.

Also in this color filter 21, haze value is 10-90, Preferably it is 25-80, More preferably, it is 30-70 by making the microparticles | fine-particles used for the light-scattering planarization layer 26 into the above-mentioned material. The total light transmittance can be 30% or more, and the diffused light transmittance can be 10% or more. In the method of using the forward scattering plate, the parallax (phenomena in which the image appears faint) is emphasized as the haze value increases, but the parallax does not occur even if the haze is high because the color filter contains the light scattering layer.

Here, the light scattering planarization layer 26 further contains a color material for correcting color characteristics in addition to the light scattering fine particles. Thereby, the coloring by the addition of light-scattering microparticles | fine-particles is prevented effectively. As a color material for the correction of a color characteristic, the thing enumerated by (d) mentioned above can be used.

In addition, in this embodiment, the color material for the correction of color characteristics may be contained in layers other than the light scattering planarization layer 26.

Such a color filter 21 can reliably prevent coloring of the light scattering planarization layer 26 by color characteristic correction by a color material. For this reason, even in the reflection type color liquid crystal display device manufactured by the separate process using the color filter 21, the fall of the color characteristic by light scattering hardly arises, and the light scattering planarization layer in the color filter 21 is carried out. Since it has (26), it becomes unnecessary to arrange | position the front-scattering plate used by the conventional reflective color liquid crystal display device on the color filter (observer side), and the high brightness reflective color liquid crystal display device becomes possible. In addition, with the improvement of the strength in accordance with the provision of the light scattering planarization layer 26, the control of the gap (thickness of the liquid crystal layer) by the spacer becomes easier.

Color filter according to the fourth embodiment

Figure 4 shows a schematic longitudinal cross-sectional view of a color filter according to a fourth embodiment of the present invention. The color filter 31 shown in FIG. 4 includes the drive element layer 33 provided on the substrate 32, the reflective electrode layer 34, the light scattering layer 35, and the coloring layer sequentially stacked on the drive element layer 33. The layer 36 and the transparent electrode layer 38 are combined, and the colored layer 36 is composed of the red colored pattern 36R, the green colored pattern 36G and the blue colored pattern 36B, and the reflective electrode layer 34 And the transparent electrode layer 38 pass through each colored pattern.

As the board | substrate 32 which comprises the color filter 31, various glass board | substrates, a metal board | substrate, a resin board | substrate, the composite board | substrate which consists of these 2 or more types of materials, etc. can be used, The thickness can use the color filter 31 etc. It can set suitably, for example, about 0.3-10 mm.

The drive element layer 33 constituting the color filter 31 is formed of a thin film transistor (TFT) formed in a predetermined pattern and each electrode of a drain, a source, and a gate. In addition, the reflective electrode layer 34 is a pixel electrode connected to the drain electrode, is formed on the drive element layer 33 with an insulating layer interposed therebetween, and mirror surface finishing is performed. In addition, when using for the semi-transmissive color liquid crystal display device mentioned later, the reflective electrode layer 34 can be made into a translucent mirror electrode layer and a hole type electrode layer. The reflective electrode layer 34 is formed of a metal thin film such as aluminum, chromium, gold, silver, or copper, and has a thickness of 500 to 10000 Pa, preferably 1000 to 3000 Pa. Such a reflective electrode layer 34 can be formed by a known thin film forming method such as a vapor deposition method, a sputtering method, a CVD method, an ion plating method, or the like.

The light scattering layer 35 constituting the color filter 31 is used to ensure adequate visibility by generating appropriate scattering of the light incident on the reflective liquid crystal display device, and disperse the light scattering fine particles in the light transmitting resin.

Examples of the light-transmissive resin include acrylic resins, epoxy resins, polyvinyl alcohol resins, polyimide resins, vinyl ether resins, and the like, and the refractive index, the reflective electrode layer 34 and the colored layer 36. In consideration of adhesiveness, it may be used alone or in a mixture of two or more thereof.

As the light scattering fine particles, those listed in the above-mentioned (c) can be used. The content of the fine particles in the light scattering layer 35 is in the range of 0.5 to 70% by weight, preferably 1.0 to 50% by weight, and the thickness of the light scattering layer 35 is 0.5 to 20 µm, preferably 1.0 to 10 µm. It is enough.

Also in this color filter 31, haze value is 10-90, Preferably it is 25-80, More preferably, it is 30-70 by using the microparticles | fine-particles used for the light scattering layer 35 as the above-mentioned material. The total light transmittance can be 30% or more, and the diffused light transmittance can be 10% or more. In the method using the forward scattering plate, the parallax (phenomena in which the image appears faint) is emphasized as the haze value increases, but in the present invention, the light scattering layer is included in the color filter so that the parallax does not occur even at high haze.

Here, the light scattering layer 35 further contains a color material for correcting color characteristics in the light scattering fine particles. This effectively prevents coloring due to the addition of the light scattering fine particles. As the colorant for the correction of color characteristics, those listed in (d) can be used.

In addition, in this embodiment, the color material for correcting color characteristics may be included in layers other than the light scattering layer 35.

The colored layer 36 can be formed by a well-known pigment dispersion method, a dyeing method, an electrodeposition method, etc., and each coloring pattern 36R, 36G, 36B is also strip-type, mosaic type, triangle type, 4-pixel arrangement type. There is no special limitation.

Since the color filter 31 can reliably prevent color adhesion of the light scattering layer 35 by color characteristic correction by the color material, the reflective color liquid crystal display device manufactured by a separate process using the color filter 31. In addition, the fall of color characteristics does not occur. In addition, since the light scattering layer 35 is included in the color filter 31, the front scattering plate disposed on the observer side in the conventional reflective color liquid crystal display device is unnecessary, and the high brightness reflective color liquid crystal display device is provided. It becomes possible. Furthermore, by placing the light scattering layer 35, the adhesion between the reflective electrode layer 34 and the colored layer 36 can be made higher.

Color filter according to the fifth embodiment

Figure 5 shows a schematic longitudinal cross-sectional view of a color filter according to a fifth embodiment of the present invention. The color filter 41 shown in FIG. 5 includes a drive element layer 43 provided on the substrate 42, a reflective electrode layer 44 sequentially stacked on the drive element layer 43, a light scattering colored layer 46, It has the transparent electrode layer 38, and the light-scattering colored layer 46 is comprised from the red coloring pattern 46R, the green coloring pattern 46G, and the blue coloring pattern 46B.

The substrate 42 constituting the color filter 41, the drive element layer 43, the reflective electrode layer 44, and the transparent electrode layer 48 are the substrate 32 and the drive element of the color filter 31 described above. Since it is the same form as the layer 33, the reflective electrode layer 34, and the transparent electrode layer 38, description is abbreviate | omitted here.

The light scattering colored layer 46 constituting the color filter 41 functions as a colored layer in a conventional reflective color liquid crystal display device and at the same time generates scattering to a suitable degree to light incident on the reflective liquid crystal display device. To ensure sufficient visibility.

The light scattering colored layer 46 is obtained by dispersing light scattering fine particles in a colored layer formed by a known pigment dispersion method, a dyeing method, an electrodeposition method, or the like. As light-scattering microparticles | fine-particles, the microparticles | fine-particles enumerated above (c) can be used.The content in the light-scattering colored layer 46 of these microparticles | fine-particles is 0.5-70 weight%, Preferably it is the range of 1.0-50 weight%, The thickness of the light scattering colored layer 46 may be set to 0.5 to 15 µm, preferably 0.5 to 10 µm.

Also in this color filter 41, haze value is 10-90, Preferably it is 25-80, More preferably, it is 30-70 by using the microparticles | fine-particles used for the light-scattering colored layer 46 as the above-mentioned material. It is possible to set the total light transmittance to 30% or more and the diffused light transmittance to 10% or more. As the haze value is increased by the method of using the forward scattering plate, parallax (phenomena in which the image is blurred) is emphasized. However, in the present invention, the color filter contains a light scattering layer, which produces a parallax even if the haze is high. There is no work.

Here, the light scattering colored layer 46 further contains a color material for correcting color characteristics in the light scattering fine particles. This effectively prevents coloring caused by the addition of the light scattering fine particles. As a color material for the correction of a color characteristic, the thing enumerated by (d) mentioned above can be used.

In addition, in this embodiment, the color material for correcting color characteristics may be contained in layers other than the light scattering colored layer 46.

In addition, the colored patterns 46R, 46G, 46B of the light scattering colored layer 46 are not particularly limited, such as strips, mosaics, triangles, and 4-pixel arrangements. Such a color filter 41 can reliably prevent deterioration of the color characteristics of the light scattering colored layer in which the light scattering fine particles are dispersed, by color characteristic correction by the color material in the manufacturing step of the light dissipating colored layer 46. The degree of light scattering can be delicately controlled for each color by adjusting the fine particle content. Therefore, also in the reflection type color liquid crystal display device manufactured by the separate process using the color filter 41, the fall of the color characteristic accompanying light scattering hardly occurs. In addition, since the light scattering colored layer 46 is included in the color filter 41, the front scattering plate disposed on the observer side in the conventional reflective color liquid crystal display device is unnecessary, and a high brightness reflective color liquid crystal display device is possible. Become.

Color filter according to the sixth embodiment

Figure 6 shows a schematic longitudinal cross-sectional view of a color filter according to a sixth embodiment of the present invention. The color filter 51 shown in FIG. 6 includes the drive element layer 53 provided on the substrate 52, the reflective electrode layer 54, the colored layer 56, and the light scattering property sequentially stacked on the drive element layer 53. It has the planarization layer 57 and the transparent electrode layer 58, and the coloring layer 56 is comprised from the red coloring pattern 56R, the green coloring pattern 56G, and the blue coloring pattern 56B.

The board | substrate 52 which comprises the said color filter 51, the drive element layer 53, the reflective electrode layer 54, the coloring layer 56, and the transparent electrode layer 58 are the board | substrate in the color filter 31 mentioned above. Reference numeral 32 is the same as the driving element layer 33, the reflective electrode layer 34, the colored layer 36, and the transparent electrode layer 38, and description thereof will be omitted.

The light scattering planarization layer 57 constituting the color filter 51 eliminates minute irregularities on the surface of the color layer 56 to uniform the thickness of the liquid crystal layer and simultaneously enters the reflective liquid crystal display device. This is to ensure scattering to a suitable degree to ensure sufficient visibility.

This light-scattering planarization layer 57 disperse | distributes light-scattering microparticles | fine-particles in resin, such as acrylic resin, an epoxy resin, vinyl ether resin, polyimide resin, and propyl resin, for example. As the light scattering fine particles, the fine particles listed in the above-mentioned (c) can be used. The content of the fine particles in the light scattering planarization layer 57 is in the range of 0.5 to 70% by weight, preferably 1.0 to 50% by weight, and the thickness of the light scattering planarization layer 57 is 0.5 to 20 µm, preferably It is about 1.0-10 micrometers.

Also in this color filter 51, when the fine particle used for the light-scattering planarization layer 57 is made into the material mentioned above, haze value is 10-90, Preferably it is 25-80, More preferably, it is 30- The range of 70, the total light transmittance can be 30% or more, and the diffuse light transmittance can be 10% or more. In the method using the forward scattering plate, the parallax (phenomena in which the image appears faint) is emphasized as the haze value increases, but the present invention does not cause parallax even if the haze is high by including the light scattering layer in the color filter. .

Here, the light scattering planarization layer 57 further contains a color material for correcting color characteristics in the light scattering fine particles. This effectively prevents coloring due to the addition of the light scattering fine particles. As the colorant for the correction of color characteristics, those listed in the above-mentioned (d) can be used.

In addition, in this embodiment, the color material for correcting the color characteristics may be configured to be contained in layers other than the light scattering planarization layer 57.

Such a color filter 51 can reliably prevent coloring of the light scattering planarization layer 57 by color characteristic correction by a color material in the manufacturing step of the color filter 51, and is a reflection type using the color filter 51. In a color liquid crystal display device, there is little occurrence of the fall of the color characteristic accompanying light scattering. In addition, since the light scattering planarization layer 57 is included in the color filter 51, the front scattering plate disposed on the observer side is unnecessary in the conventional reflective color liquid crystal display device, and a high brightness reflective color liquid crystal display device is enabled. . In addition, as the light scattering planarization layer 57 is provided, control of the gap (thickness of the liquid crystal layer) by the spacer is facilitated by improving the strength.                     

Color filter according to the seventh to twelfth embodiments

The color filter by 7th-12th embodiment of this invention shown below is an embodiment which contained light-scattering microparticles | fine-particles in two layers in a color filter. By dividing the light scattering fine particles into two layers in this manner, the amount of light scattering fine particles per layer can be reduced, and the haze value of the entire color filter can be stored and maintained even if the haze value of each layer is lowered. Each layer can be thinned, and the control of the film thickness becomes easier than when the light scattering fine particles are contained in one layer. In the seventh to twelfth embodiments, the color material for the correction of the color characteristics may be included in the two layers together with the light scattering fine particles, but together with the light scattering fine particles or separately from the light scattering fine particles. It is good also as a structure made to contain only one layer.

Among these embodiments, the color filters according to the seventh to ninth embodiments are color filters of the type disposed on the observer side with respect to the liquid crystal layer in the reflective color liquid crystal display device. The color filters according to the tenth to twelfth embodiments are color filters of the type disposed on the opposite side to the observer side with respect to the liquid crystal layer in the reflective color liquid crystal display device.

Color filter according to the seventh embodiment

The color filter according to the present embodiment includes the light scattering fine particles not only in the light scattering layer 3 but also in the colored layer 4 in the above-described color filter of the first embodiment. In other words, the color filter according to the present embodiment has a configuration in which the colored layer 4 of the first embodiment is replaced with the light scattering colored layer 12 of the second embodiment. Therefore, the light scattering fine particles used in the present embodiment are the same as the fine particles used in the second embodiment. Furthermore, in the present embodiment, the light scattering fine particles contained in the light scattering layer and the light scattering colored layer may be distributed in both layers so as to obtain an optimum haze value, and the content in each layer is not particularly limited. .

In this embodiment, the light scattering fine particles may be contained in at least one color pattern among the color patterns 4R, 4G, and 4B, and the content may be changed for each color. Thereby, when a haze value cannot be obtained evenly, there exists an advantage which can be adjusted finely so that a haze value can be obtained evenly. And of course, light-scattering microparticles | fine-particles may be contained in all the colors of a coloring pattern.

Color filter according to the eighth embodiment

The color filter according to the present embodiment includes the light scattering fine particles not only in the light scattering planarization layer 26 but also in the colored layer 24 in the color filter of the above-described third embodiment shown in FIG. In other words, the color filter according to the present embodiment has a configuration in which the colored layer 24 of the third embodiment is replaced with the light scattering colored layer 14 of the second embodiment. Therefore, the light scattering fine particles used in the present embodiment are the same as the fine particles used in the second embodiment. Furthermore, in the present embodiment, the light scattering fine particles contained in the light scattering layer and the light scattering colored layer may be distributed in both layers so as to obtain an optimum haze value, and the content in each layer is not particularly limited. Do not.

In this embodiment, the light-scattering fine particles may be contained in at least one color pattern among the color patterns 24R, 24G, and 24B, and the content may be changed for each color. Thereby, when a haze value cannot be obtained evenly, there exists an advantage which can be adjusted finely so that a haze value can be obtained evenly. It goes without saying that the light scattering fine particles may be contained in all the colors of the colored pattern.

Color filter according to the ninth embodiment

The color filter according to the present embodiment is the third filter described above between the colored layer 4 and the transparent electrode layer 5 as well as the light scattering layer 3 in the color filter of the first embodiment described above shown in FIG. 1. The same layer as the light scattering planarization layer 26 of the embodiment is provided. Thereby, the adhesiveness of the transparent substrate 2 and the colored layer 4 can be made higher by the light scattering layer 3, and the surface of the colored layer 4 is made by the light scattering planarization layer 26. There is an advantage that a flat surface can be obtained by eliminating irregularities. Furthermore, in the present embodiment, the light scattering fine particles contained in the light scattering layer and the light scattering flattening layer may be distributed in both layers so as to obtain an optimum haze value, and the content in each layer is particularly limited. It doesn't work.

Color filter by the tenth embodiment

The color filter according to the present embodiment includes the light scattering fine particles not only in the light scattering layer 35 but also in the colored layer 36 as the color filter of the above-described fourth embodiment shown in FIG. In other words, the color filter according to the present embodiment is configured by replacing the colored layer 36 of the fourth embodiment with the light scattering colored layer 46 of the fifth embodiment. Therefore, the light scattering fine particles used in the present embodiment are the same as the fine particles used in the fifth embodiment. Furthermore, in the present embodiment, the light scattering fine particles contained in the light scattering layer and the blue layer may be distributed in both layers so as to obtain an optimum haze value, and the content in each layer is not particularly limited.

In the present embodiment, the light scattering fine particles may be contained in at least one color pattern among the color patterns 36R, 36G, and 36B, and the content may be changed for each color. As a result, when the haze value cannot be obtained evenly, there is an advantage that the fine adjustment can be made so that the haze value is evenly obtained. And of course, light-scattering microparticles | fine-particles may be contained in all the colors of a coloring pattern.

Color filter by the eleventh embodiment

The color filter according to the present embodiment includes the light scattering fine particles not only in the light scattering planarization layer 57 but also in the coloring layer 56 in the color filter of the sixth embodiment shown in FIG. In other words, the color filter according to the present embodiment has a configuration in which the colored layer 56 of the sixth embodiment is replaced by the light scattering colored layer 46 of the fifth embodiment. Therefore, the light scattering fine particles used in the present embodiment are the same as the fine particles used in the fifth embodiment. Furthermore, in the present embodiment, the light scattering fine particles contained in the light scattering layer and the colored layer may be distributed in both layers so as to obtain an optimum haze value as a result, and the content in each layer is not particularly limited. .

In the present embodiment, the light scattering fine particles may be contained in at least one color pattern in each color pattern 56R, 56G, and 56B, and the content may be changed for each color. When this cannot be obtained evenly, there is an advantage that the haze value can be adjusted evenly, and of course, the light scattering fine particles may be contained in all the colors of the coloring pattern.

Color filter by the twelfth embodiment

In the color filter according to the fourth embodiment described above, the color filter according to the present embodiment includes the above-mentioned agent between the colored layer 36 and the transparent electrode layer 38 as well as the light scattering layer 35. The same layer as the light scattering planarization layer 57 of the sixth embodiment is provided. Thereby, the adhesiveness of the transparent substrate 32 and the colored layer 36 can be made higher by the light scattering layer 35, and the colored layer 36 of the light scattering planarization layer 26 is carried out. There is an advantage that a flat surface can be obtained by eliminating surface irregularities. Furthermore, in the present embodiment, the light scattering fine particles contained in the light scattering layer and the light scattering flattening layer may be distributed in both layers so that the haze value can be optimally obtained as a result, and the content in each layer is not particularly limited. not.

Reflective Color Liquid Crystal Display

Next, examples of the reflective color liquid crystal display device using the color filter of the present invention are listed.

FIG. 7 is a schematic longitudinal cross-sectional view showing a reflective color liquid crystal display device using the color filter 1 of the present invention shown in FIG. In FIG. 7, the reflection type color liquid crystal display device 61 arrange | positions the color filter 1 of this invention on the observer side, and the phase difference plate 62 and the polarizing plate on the transparent substrate 2 of this color filter 1 are shown. The liquid crystal layer 68 is formed between the counter electrode substrate on which the drive element layer 66 and the reflective electrode plate 67 are formed on the substrate 65 and the color filter 1.

8 is a schematic longitudinal cross-sectional view showing a reflective color liquid crystal display device using the color filter 41 of the present invention shown in FIG. In FIG. 8, the reflective color liquid crystal display 71 has a transparent electrode layer 73 on one side of the transparent substrate 72, and a phase difference plate 74 and a polarizer 75 on the other side. The liquid crystal layer 78 is formed in the gap portion so as to face the directional substrate, the color filter 41 of the present invention, and a predetermined gap therebetween. In the reflective color liquid crystal display 71, the color filter 41 of the present invention is located on the opposite side to the observer with the liquid crystal layer 78 interposed therebetween.

The color filter of this invention can be used also for the transflective color liquid crystal display device other than the reflective color liquid crystal display device mentioned above.

The semi-transmissive color liquid crystal display has been developed to combine the advantages of each of the transmissive and reflective color liquid crystal display devices, and forms a transmissive display portion and a reflective display portion in one pixel, and has conventionally different liquid crystal display modes. It is equipped with the display mode which compatible the phosphorus transmission / reflection liquid crystal display mode.

When the transflective color liquid crystal display device is manufactured with the structure as shown in FIG. 7, the above-mentioned reflective electrode layer 67 is used as the translucent mirror electrode layer or the hole electrode layer, and the color filters 1, 11 and 21 of the present invention are used. Can be used as is.

When the transflective color liquid crystal display device is manufactured with the structure as shown in Fig. 8, each of the reflective electrode layers 34, 44, and 54 of the color filters 31, 41, and 51 of the present invention described above is translucent mirror electrode layer. Or a hole type electrode layer. The semi-transparent mirror electrode layer is intended to have a semi-transmissive property in the conductive thin film itself that allows some light to pass through and reflects the rest, and is formed by controlling known film formation processes such as vapor deposition, sputtering, CVD, and ion plating. Can be. In addition, in the hole type electrode layer, one pixel is allocated to a transmissive part (perforated part) and a reflecting part in an area, and a metal thin film is formed by the film forming method as described above, and then patterned to form a predetermined fine opening. It can form by installing.

EXAMPLE

Next, an Example is shown and this invention is demonstrated in detail.

Example A1

A glass substrate (alkali-free glass) having a thickness of 0.7 mm was prepared as the substrate.

The coating liquid for a light scattering layer of the following composition is apply | coated by this spin-coating method on this glass substrate, it is made to dry, and then exposure, image development, and post bake (20 degreeC, 30 minutes) are performed, and a light scattering layer ( Thickness of 10 mu m).

Coating solution for light scattering layer

Epoxy acrylate

(Dong-A Synthetic Chemical Co., Ltd .; EA450)

ㆍ Multifunctional Acrylate Monomer ㆍ · 15 parts by weight

(Japanese Gunpowder Co., Ltd .; DPHA)

Melamine beads (average particle size: 0.7 µm) ㆍ 10 parts by weight

ㆍ Polymerization Initiator ㆍ · 4 parts by weight

（Ilgakiya 184, made by Chiba Kaigisa）                     

ㆍ diluent solvent ㆍ ・ ・ 36 parts by weight

(Propylene glycol monoethyl acetate)

Next, a photosensitive coloring material (color mosaic CR-7000 manufactured by Fujifilm Orin Co., Ltd.) for the red coloring pattern was applied on the light scattering layer by spin coating, and the coating film was exposed through a predetermined photomask. Then, it developed using the developing wave (CD by Fujifilm Orlean Co., Ltd.), the glass substrate was hold | maintained at 200 degreeC for 30 minutes, hardening a colored layer, and the red coloring pattern was formed.

Similarly, the photosensitive coloring material (color mosaic CG-7000 by Fuji Film Orlean) and the photosensitive coloring material (color mosaic CG-7000 by Fuji Film Orlean) for blue coloring pattern are used. After the same procedure as described above, a green colored pattern and a blue colored pattern were formed to obtain a colored layer.

Subsequently, a transparent electrode (ITO) layer is formed on the colored layer according to the method defined above, and an alignment film (thickness of 0.05 µm) of polyimide resin is formed on the transparent electrode layer, and the color filter having the structure as shown in FIG. (Example Al) was obtained.

Here, by adding a color material for correcting color characteristics to the coating liquid for light scattering layer, deterioration of color characteristics accompanying the addition of light scattering fine particles can be prevented, thereby providing excellent color characteristics to the color filter.

Example A2

As a board | substrate, the glass substrate (alkali glass) of thickness 0.7mm was prepared.

Spin-coating a coating liquid containing 27% by weight of a melamine beads having an average particle diameter of 0.7 μm as light scattering fine particles in a photosensitive coloring material (Color Mosaic CR-7000 manufactured by Fujifilm Orin Co., Ltd.) for a red colored pattern on the glass substrate. The coating film is applied by a method, and the coating film is exposed through a predetermined photomask, and then developed using a developing solution (CD of Fujifilm Orlean Co., Ltd.), and the glass substrate is held at 200 ° C. for 30 minutes to provide a colored layer. Was cured to form a red colored pattern.

Similarly, the coating liquid which made 27 weight% of melamine beads of 0.7 micrometer of average particle diameters contained in the photosensitive coloring material (color mosaic CG-7000 by Fujifilm Orin Co., Ltd.) for green coloring patterns, and photosensitive for blue coloring patterns After using the coating liquid which contained 27 weight% of melamine beads of 0.7 micrometer of average particle diameters in the coloring material (Color Mosaic CB-7000 by Fujifilm Orin Co., Ltd.), it carried out similarly to the above, and a green coloring pattern and a blue coloring pattern To form a light scattering colored layer.

Next, a transparent electrode (ITO) layer and an alignment film were formed similarly to Example Al, and the color filter (Example A2) of the structure as shown in FIG. 2 was obtained.

Here, by adding a colorant for correcting color characteristics to the three types of coating liquid for the light scattering colored layer, it is possible to prevent deterioration of the color characteristics accompanying the addition of the light scattering fine particles and to impart excellent color characteristics to the Cali filter. Can be.

Example A3

A glass substrate (alkali glass) having a thickness of 0.7 mm was prepared as a substrate, and a colored layer was formed on the glass substrate in the same manner as in Example Al.

Next, the coating liquid for light-scattering planarization layers of the following composition is apply | coated by a spin coating method on a colored layer, and it is made to dry, after that, exposure, image development, post-baking (200 degreeC, 30 minutes) are performed, and a light-scattering planarization layer (thickness) 10 μm) was formed.

Coating solution for light scattering planarization layer

Epoxy acrylate

(Dong-A Synthetic Chemical Co., Ltd .; EA450)

ㆍ Multifunctional Acrylate Monomer ㆍ · 15 parts by weight

(Japanese Gunpowder Co., Ltd .; DPHA)

Melamine beads (average particle size: 0.7 µm) ㆍ 10 parts by weight

ㆍ Polymerization Initiator ㆍ · 4 parts by weight

（Ilgakiya 184, made by Chiba Kaigisa）

ㆍ diluent solvent ㆍ ・ ・ 36 parts by weight

(Propylene glycol monoethyl acetate)

Next, a transparent electrode (ITO) layer and an alignment film were formed on the light scattering planarization layer in the same manner as in Example A1 to obtain a color filter (Example A3) having a structure as shown in FIG.

Here, by adding a color material for correcting color characteristics to the coating liquid for light scattering flattening layer, deterioration of color characteristics accompanying the addition of light scattering fine particles can be prevented, thereby providing excellent color characteristics to the color filter.

The retardation plate and the polarizing plate were laminated | stacked on the glass substrate of each color filter (Examples A1-A3) produced as mentioned above. Furthermore, a TFT drive element layer and a reflective electrode layer made of aluminum were formed on a glass substrate having a thickness of 0.7 mm, and an alignment film (thickness of 0.05 µm) of polyimide resin was formed to form a counter electrode substrate. Each alignment film of a filter was made to oppose, the nematic liquid crystal layer (thickness 5.0micrometer) was provided, and the reflective color liquid crystal display device was created.

Example A4

As a substrate, a glass substrate (alkali glass) having a thickness of 0.7 mm was prepared, and a TFT drive element layer and a reflective electrode layer made of aluminum were formed on the glass substrate.

Next, the coating solution for the light scattering layer having the same composition as in Example Al was applied and dried on the reflective electrode layer by spin coating, followed by exposure, development, and post-baking (200 ° C., 30 minutes). Thickness 8.0 mu m).

Next, a colored layer was formed on the light scattering layer in the same manner as in Example Al.

Next, a transparent electrode (ITO) layer was formed on the colored layer, and an alignment film (thickness: 0.05 µm) of polyimide resin was further formed to obtain a color filter (Example A4) having a structure as shown in FIG.

Here, by adding a color material for correcting color characteristics to the coating solution for the light scattering layer, deterioration of color characteristics accompanying the addition of the light scattering fine particles can be prevented, thereby providing excellent color characteristics to the color filter.

Example A5

As a board | substrate, the glass substrate (alkali glass) of thickness 0.7mm was prepared. A TFT drive element layer and a reflective electrode layer made of aluminum were formed on this glass substrate.

Next, spin the coating solution containing 27% by weight of melamine beads having an average particle diameter of 0.7 μm as light scattering fine particles on the photosensitive coloring material (color mosaic CR-7000 manufactured by Fujifilm Orin Co., Ltd.) for the red coloring pattern on the reflective electrode layer. It apply | coats by a coating method, exposes a coating film through a predetermined photomask, and develops using a developing solution (CD of Fujifilm Orlean Co., Ltd.) after that, maintains a glass substrate at 200 degreeC for 30 minutes, and is coloring. The layer was cured to form a red colored pattern.

Similarly, the coating liquid which made 27 weight% of melamine beads of 0.7 micrometer of average particle diameters contained in the photosensitive coloring material (color mosaic CG-7000 by Fujifilm Orin Co., Ltd.) for green coloring patterns, and photosensitive for blue coloring patterns After using the coating liquid which contained 27 weight% of melamine beads of 0.7 micrometer of average particle diameters in the coloring material (Color Mosaic CB-7000 by Fujifilm Orin Co., Ltd.), it carried out similarly to the above, and a green coloring pattern and a blue coloring pattern To form a light scattering colored layer.

Next, a transparent electrode layer was formed on the light scattering colored layer in the same manner as in Example A4, and an alignment film was further formed to obtain a color filter (Example A5) having a structure as shown in FIG.

Here, by adding a color material for correcting color characteristics to the three types of coating liquid for the light scattering colored layer, it is possible to prevent deterioration of the color characteristics accompanying the addition of the light scattering fine particles and to impart excellent color characteristics to the color filter. Can be.

Example A6

A glass substrate (alkali glass) having a thickness of 0.7 mm was prepared as the substrate, and a TFT drive element layer and a reflective electrode layer made of aluminum were formed on the glass substrate.

Next, a colored layer was formed on the reflective electrode layer in the same manner as in Example Al.

Next, the coating liquid for light-scattering planarization layer of the same composition as Example A3 was apply | coated by spin coating, and dried on a colored layer, and it exposed, developed, and postbaked (200 degreeC, 30 minutes), and carried out the light-scattering planarization layer ( Thickness 8.0 mu m).

Next, a transparent electrode layer was formed on the light scattering planarization layer in the same manner as in Example A4, and an alignment film was further formed to obtain a color filter (Example A6) having a structure as shown in FIG.

Here, by adding a color material for correcting color characteristics to the coating liquid for the light scattering planarization layer, deterioration of color characteristics accompanying the addition of the light scattering fine particles can be prevented, thereby providing excellent color characteristics to the color filter.

Then, a transparent electrode (ITO) layer is formed on one side of the glass substrate having a thickness of 0.7 mm, an alignment film (thickness of 0.05 μm) of polyimide resin is further formed, and a phase difference plate and a polarizing plate are laminated on the other side of the glass substrate. To form a counter substrate. The counter substrate and the alignment film of each of the color filters (Examples A4 to A6) produced as described above were opposed to each other to provide a nematic liquid crystal side (thickness of 5.0 µm) to produce a reflective color liquid crystal display device.

Comparative Example Al

A color filter was produced in the same manner as in Example A1 except that no light scattering layer was provided. And the polarizing plate (AGSl made from Nippon Denki Co., Ltd.) which built the retardation plate and the said scattering layer was laminated | stacked on the glass substrate of this color filter (comparative example). Further, a TFT drive element layer and a reflective electrode layer made of aluminum are formed on a glass substrate having a thickness of 0.7 mm, and a polyimide resin alignment film (thickness of 0.05 μm) is further formed to be a counter electrode substrate, and the alignment film of the counter electrode substrate is The alignment film of a color filter was made to oppose, the nematic liquid crystal layer (thickness 5.0 micrometers) was provided, and the reflective color liquid crystal display device was produced.

As described above, the luminance of the display image of each reactive color liquid crystal display device using the color filters (Examples A1 to A6) of the present invention and the color filters (Comparative Example A1) of the comparative example, respectively, was measured by the following method. The results are shown in Table 1 below.

Measurement method of brightness

The luminance meter (Tomcon Co., Ltd. product BM7) was installed in front, and the reflectance (front brightness) was measured by changing the light source incidence angle to 15 degrees, 20 degrees, 30 degrees, and 45 degrees. In addition, the haze value, total light transmittance, and diffuse light transmittance of the color filters (Examples A1 to A3) and the comparative color filters (Comparative Example A1) of the present invention were measured by a direct reading base meter manufactured by Dongyang Seiki Co., Ltd. Is shown in Table 1 below.

Table 1

Color filter reflectivity(%) Measurement result of color filter group 15 ° 20 ° 30 ° 45 ° Haze value Total light transmittance Diffuse Light Transmittance Example A1 34 21 16 4 58 50 29 Example A2 34 21 16 4 57 51 29 Example A3 33 21 15 4 57 50 28 Example A4 33 20 15 3 - - - Example A5 32 20 15 3 - - - Example A6 32 20 15 3 - - - Comparative Example A1 28 15 6 <1 26 46 12

Example B1

The change of the spectral characteristic by adding a color material to a color filter was investigated. On the other hand, in this embodiment, in order to eliminate scattered light and facilitate measurement, or to calculate the change in the spectral characteristics when light scattering fine particles enter, to derive the spectral characteristics when light scattering fine particles and colorant are added. The spectroscopic characteristics were measured by manufacturing the coating liquid for light-scattering layers which excluded the light-scattering active fine particles from the light-scattering layer forming material.

First, the case where various pigments were disperse | distributed to the light scattering layer and the light-scattering planarization layer was assumed, and the coating liquid for light-scattering layers which does not contain the light-scattering microparticles | fine-particles of the compounding examples 1-3 was prepared at the following mixing | blending ratio. Here, a paint shaker is used for dispersion of a pigment, and various dispersers, such as a roll dispersion apparatus, can be used for pigment dispersion.

Formulation Example 1

ㆍ 50 parts by weight of epoxy acrylate (EA450 Dong-A Synthetic)

ㆍ 20 parts by weight of polyfunctional acrylate monomer (DPHA Japan Gunpowder)

ㆍ 5 parts by weight of photoinitiator (Ilgacua 907 Nippon Gunpowder)

ㆍ P .R209 red pigment 1 part by weight

ㆍ Dispersion material (Disperbyk 161 Big Chemistry Fan) 5 parts by weight

Formulation Example 2

ㆍ 50 parts by weight of epoxy acrylate (EA450 Dong-A Synthetic)

ㆍ 20 parts by weight of polyfunctional acrylate monomer (DPHA Japan Gunpowder)

ㆍ 5 parts by weight of photoinitiator (Ilgacua 907 Nippon Gunpowder)                     

ㆍ P. B 15: 3 blue pigment 1 part by weight

ㆍ Dispersion material (Disperbyk 161 Big Chemistry Fan) 5 parts by weight

Formulation Example 3

ㆍ 50 parts by weight of epoxy acrylate (EA450 Dong-A Synthetic)

ㆍ 20 parts by weight of polyfunctional acrylate monomer (DPHA Japan Gunpowder)

ㆍ 5 parts by weight of photoinitiator (Ilgacua 907 Nippon Gunpowder)

ㆍ P.V23. 1 part by weight of purple pigment

ㆍ Dispersion material (Disperbyk 161 Big Chemistry Fan) 5 parts by weight

Next, it carried out similarly to Example A3, and produced it into the colored layer. The coating liquid for light-scattering layers which does not contain the light-scattering microparticles | fine-particles of the said compounding example 1 is apply | coated to the obtained colored layer in thickness of 10 micrometers, and it dries, and then exposure, image development, and postbaking (200 degreeC, 30 minutes) And a color filter was obtained. Moreover, the color filter using the coating liquid of the compounding example 2, the color filter using the coating liquid of the compounding example 3, and the color filter using the coating liquid which excluded the color material in the compounding example 1 were produced similarly to the above.

About the produced color filter, the reflected spectral chromaticity coordinate (D65 light source) was measured with the microscopic spectrophotometer (Model name: OSP-SP200, the product made by Olympus Optical).

The measurement result at the time of using the coating liquid of the compounding example 1 in FIG. 9, the measurement result at the time of using the coating liquid of the compounding example 2 in FIG. 10, and the measurement result at the time of using the coating liquid of the compounding example 3 in FIG. And FIG. 12 shows the measurement results of the color filter without the colorant added, respectively. That is, the measurement result when FIG. 9 adds a red pigment, the measurement result when FIG. 10 adds a blue pigment, the measurement result when FIG. 11 adds a purple pigment, and FIG. 12 adds a color material The measurement results when not shown are shown on the chromaticity coordinates, respectively.

In the drawings,? Mark is green,? Mark is blue,? Mark is red,? Mark located at the center of coordinates is white, and + mark corresponds to chromaticity coordinate of standard light D65, respectively.

As can be seen from Figures 9 to 12, according to the embodiment using the color material of the present invention, red (Fig. 9), blue (Fig. 10) with respect to the color filter (Fig. 12) in which the colored layer is formed under the same conditions. And purple (FIG. 11) and desired spectral characteristics can be imparted. That is, it was possible to correspond the color filter of this invention to various spectral characteristic forms.

Example B2

By adding a color material to the color filter, color correction of the light scattering layer was performed to improve the problem that the color filter itself became yellow. That is, as described above, the light scattering layer may require a thick thickness of 5 µm or more in order to exhibit its function. If there is a coloring component in such a material that adversely affects the color characteristics of the color filter, there is a problem that the color filter itself becomes yellow, and this embodiment solves this problem.

On the other hand, also in the present embodiment, in order to eliminate the scattered light and to facilitate measurement, and to calculate the change in the spectral characteristics when the light scattering fine particles come in, to derive the spectral characteristics when the light scattering fine particles and the colorant are added. For this purpose, the spectral characteristics were measured by producing a coating solution for the light scattering layer except the light scattering fine particles from the light scattering layer forming material.

First, the case where various pigments are disperse | distributed to a light scattering layer and a light-scattering planarization layer was assumed, and the coating liquid for light scattering layers of the compounding examples 4-6 was prepared by the following compounding ratio. Here, although the paint shaker was used for dispersion of a pigment, various dispersion machines, such as a roll dispersion apparatus, can be used for pigment dispersion.

Formulation Example 4

ㆍ 50 parts by weight of epoxy acrylate (EA450 Dong-A Synthetic)

ㆍ 20 parts by weight of polyfunctional acrylate monomer (DPHA Japan Gunpowder)

ㆍ 5 parts by weight of photoinitiator (Ilgacua 907 Nippon Gunpowder)

Formulation Example 5

ㆍ 50 parts by weight of epoxy acrylate (EA450 Dong-A Synthetic)

ㆍ 20 parts by weight of polyfunctional acrylate monomer (DPHA Japan Gunpowder)

ㆍ 5 parts by weight of photopolymerization initiator (Ilgacure 369 Nippon Gunpowder)

Formulation Example 6

ㆍ 50 parts by weight of epoxy acrylate (EA450 Dong-A Synthetic)

ㆍ 20 parts by weight of polyfunctional acrylate monomer (DPHA Japan Gunpowder)

ㆍ 5 parts by weight of photoinitiator (Ilgacua 907 Nippon Gunpowder)

ㆍ P.V23. 1 part by weight of purple pigment

ㆍ Dispersion material (Disperbyk 161 Big Chemistry Fan) 5 parts by weight                     

Here, the photoinitiator (Ilgacua 369) used in the compounding examples 5 and 6 can perform photopolymerization with high sensitivity efficiently, but there is a problem of coloring in yellow because it maintains absorption in the visible region. On the other hand, the photopolymerization initiator (Ilgacua 907) used in the compounding example 4 does not maintain absorption in the visible region, but has a problem in that the exposure time is long due to the low sensitivity and the productivity is lowered.

Next, the color filter was produced like Example Al except not having formed a light scattering layer. The coating liquid for light scattering layers of the said compounding example 4 was apply | coated and dried by the sputtering method to the obtained color filter board | substrate, and it exposed, developed, and postbaked (200 degreeC, 30 minutes), and formed the light-scattering layer. Thus, color correction light scattering layer sub color filter was obtained. And the color filter using the coating liquid of the compounding example 5, and the color filter using the coating liquid of the compounding example 6 were produced similarly to the above.

About the produced color filter, the reflection spectral chromaticity coordinate (D65 light source) was measured in the same form as Example Bl.

The measurement result at the time of using the coating liquid of the compounding example 4 in FIG. 13, the measurement result at the time of using the coating liquid of the compounding example 5 in FIG. 14, and the measurement result at the time of using the coating liquid of the compounding example 6 in FIG. Respectively. That is, FIG. 13 shows the case where the component (monocure 369) which lowers the color characteristic of a color filter is not included, and FIG. 14 shows the case where the component (monocure 369) which reduces the color characteristic of a color filter is included. 15 is a case where the coloring component which reduces the color characteristic of a color filter (FIG. 13) is shown, and the case where color correction was performed by adding a color material is shown.

As can be seen from FIGS. 13 to 15, according to the state in which color correction of the present invention is added and color correction is performed (FIG. 15), a color component that reduces color characteristics of the color correction light scattering layer portion color filter is as described. Even in the case of a material (FIG. 14), it is almost equivalent to the case of the material (FIG. 13) which does not contain the coloring component which reduces a color characteristic, and it becomes possible to obtain sufficient color characteristics. Therefore, according to the present invention having a color material for color correction, the sensitivity of the photopolymerization initiator (Ilgaqua 369 in this embodiment) can be sufficiently utilized without degrading the color characteristics.

As described above, according to the color filter of the present invention, the front scattering plate is not necessary, there is no parallax (a phenomenon in which the image is faint) with high brightness, and the deterioration of the color characteristic can be prevented to achieve excellent color characteristics. Can be.

And the desired color characteristic can be provided and it can respond easily to various spectral shapes. Moreover, since the material suitable for manufacture can be selected widely without being restrict | limited to coloring property according to a film thickness, there exists also the advantage which can improve productivity. Furthermore, when the colored layer is provided on the light scattering layer, color correction is particularly easy, and when the light scattering colored layer is provided, the light scattering layer and the colored layer can be collectively formed, thus simplifying the manufacturing process. When the light scattering planarization layer is provided, functions as a protective layer and a planarization film can be added. In addition, in the color filter of the present invention having a reflective electrode layer, the reflective electrode layer can be used in a semi-transmissive color liquid crystal display device by using a semi-transparent mirror type electrode layer or a hole type electrode layer.

Claims (3)

In the color filter for a liquid crystal display device which contains the board | substrate and the coloring layer which becomes a coloring pattern of various colors, It contains light scattering fine particles and a color material for correction of color characteristics, The haze value is in the range of 10 to 90, Total light transmittance is 30% or more, The color filter for liquid crystal display devices characterized by the above-mentioned. The color filter for a liquid crystal display device according to claim 1, further comprising a layer containing both the light scattering fine particles and the color material. delete

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