WO2006041044A1 - カラーフィルタ及びそれを備える液晶表示装置 - Google Patents
カラーフィルタ及びそれを備える液晶表示装置 Download PDFInfo
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- WO2006041044A1 WO2006041044A1 PCT/JP2005/018664 JP2005018664W WO2006041044A1 WO 2006041044 A1 WO2006041044 A1 WO 2006041044A1 JP 2005018664 W JP2005018664 W JP 2005018664W WO 2006041044 A1 WO2006041044 A1 WO 2006041044A1
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- Prior art keywords
- color filter
- liquid crystal
- colored layer
- crystal display
- display device
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/201—Filters in the form of arrays
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
- G02F1/134363—Electrodes characterised by their geometrical arrangement for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
Definitions
- the present invention relates to a color filter used in a horizontal electric field type liquid crystal display device and a horizontal electric field type liquid crystal display device provided with the color filter, and in particular, an electrical property of a colored layer constituting a pixel.
- the present invention relates to a color filter that can ensure sufficient reliability without providing a protective layer on a pixel that does not adversely affect the switching performance of the liquid crystal, and a liquid crystal display device using the color filter.
- Color liquid crystal display devices are rapidly spreading mainly in computer terminal display devices and television image display devices.
- the color filter is an essential component indispensable for color display of liquid crystal display devices.
- various new types of liquid crystal display devices having a high viewing angle and high-speed responsiveness, which are demanded to improve image quality, have appeared.
- the horizontal electric field type liquid crystal display device has an electrode between the pixel and the liquid crystal. Therefore, since there is a colored layer of the color filter in the liquid crystal driving electric field, there is a problem that the liquid crystal molecules are directly affected by the electrical characteristics of the material of the colored layer.
- the electrical properties of the colored layer material are mainly due to the properties of the pigment, which is the colorant contained in the colored layer, and are fundamentally difficult to avoid. Therefore, the conventional colored layer material is used.
- a protective layer overcoat layer with a transparent resin is provided on the pixel so that the liquid crystal sandwiching surface and the colored layer are in direct contact with each other. It is common.
- An object of the present invention is to solve the above problems, and is a color filter used in a horizontal electric field type liquid crystal display device, in which the electrical properties of a colored layer constituting a pixel are liquid crystal. It is an object of the present invention to provide a color filter that can ensure sufficient performance without providing a protective layer (overcoat layer) made of transparent resin that does not adversely affect the switching performance of the resin.
- Another object of the present invention is to provide a horizontal electric field type liquid crystal display device including such a color filter.
- the color filter is provided between the liquid crystal and the pixel of the liquid crystal display device.
- the protective layer is not provided on the pixel, and the dielectric loss tangent (tan ⁇ ) of the colored layer of at least one color is 0.03 or less in a frequency range of 10 ⁇ to 100 ⁇ .
- a color filter is provided.
- a transparent substrate and a pixel including a plurality of colored layers provided on the transparent substrate are provided.
- the difference between the dielectric loss tangent (tan ⁇ ) of the colored layer of at least one color and the dielectric loss tangent of the liquid crystal material of the liquid crystal display device is within 0.03 in the frequency range of 10 Hz to LOOHz.
- a color filter is provided.
- a horizontal electric field type liquid crystal display device comprising the above-described color filter.
- FIG. 1 is a schematic cross-sectional view of a horizontal electric field type liquid crystal display device.
- FIG. 2 is a graph showing frequency characteristics of dielectric loss tangent of a red colored layer material.
- FIG. 3 is a graph showing frequency characteristics of dielectric loss tangent of a green colored layer material.
- FIG. 4 is a diagram showing frequency characteristics of dielectric loss tangent of a blue colored layer material.
- FIG. 5 is a graph showing the relationship between the green pigment concentration and the dielectric loss tangent at 20 Hz for the green colored layer material.
- the color filter according to the first aspect of the present invention is a color filter used in a horizontal electric field type liquid crystal display device, and includes a transparent substrate and a plurality of colored layers provided on the transparent substrate.
- a liquid crystal alignment film is laminated on the pixel without providing a protective layer, and the dielectric loss tangent (tan ⁇ ) of the colored layer of at least one color is in the range of a frequency of 10 ⁇ to 100 0 ⁇ , 0. 03 or less.
- the color filter according to the first aspect of the present invention is preferably applied when the pixel includes a green colored layer, that is, when a plurality of colors are R, G, and B.
- the dielectric loss tangent (tan S) of the green colored layer is preferably 0.03 or less in the frequency range of 10 Hz to LOOHz.
- the pixel may include a red colored layer and a blue colored layer having a dielectric loss tangent (tan ⁇ ) of 0.03 or less in a frequency range of 10 Hz to LOOHz.
- the green colored layer preferably has a relative dielectric constant of 5.0 or less in the frequency range of 10 Hz to 100 Hz.
- the value of the dielectric loss tangent tends to increase due to the nature of the colored pigment. It is also effective to reduce the dielectric constant to 5.0 or less in the frequency range from 10 Hz to LOOHz in order to obtain a liquid crystal display device with good display performance.
- the color filter according to the first aspect of the present invention preferably has a surface step of 0.3 ⁇ m or less. If the surface step force of the color filter is 0.3 m or less, the occurrence of alignment disorder of the liquid crystal molecules is prevented, which contributes to the improvement of the liquid crystal display performance.
- the color filter according to the first aspect of the present invention preferably has a surface contact angle with water of 65 ° or less.
- the contact angle with water on the surface of the color filter is 65 ° or less, the affinity with the alignment film of polyimide formed thinly on the color filter is improved, and a uniform polyimide alignment film is formed on the entire surface. As a result, the alignment of the liquid crystal molecules becomes uniform, leading to improved display characteristics.
- Each of the colored layers of a plurality of colors can contain a surfactant in order to improve the coating property of the coating liquid to the substrate, but in order to make the contact angle with water 65 ° or less. It is desirable to suppress the content of the surfactant to a low level of 0.001 to 0.2% by weight based on the coating material for forming the colored layer.
- the green colored layer preferably contains a green pigment of 30% by weight or less based on the total solid content.
- the dielectric loss tangent (ta ⁇ ⁇ ) of the green colored layer can be made 0.03 or less in a frequency range of 10 Hz to LOOHz.
- the green colored layer has an elution amount of Na +, K + alkali metal ions and Cl_, ⁇ ⁇ ⁇ ⁇ halogen element ions of 3 ppm or less in pure water for 3 hours. It is desirable to contain a green pigment. By adjusting the elution amount of ions of the green pigment to a deviation of 2 ppm or less, the dielectric loss tangent (tan S) of the green colored layer can be made 0.03 or less in a frequency range of 10 Hz to LOOHz.
- the color filter according to the second aspect of the present invention is used in a horizontal electric field type liquid crystal display device including a transparent substrate and pixels including a plurality of colored layers provided on the transparent substrate.
- a color filter wherein a difference force between a dielectric loss tangent (tan ⁇ ) of a colored layer of at least one color and a dielectric loss tangent of a liquid crystal material of the liquid crystal display device is within 0.03 in a frequency range of 10 Hz to LOOHz.
- a liquid crystal display device includes the color filter described above. According to such a liquid crystal display device, it is possible to obtain good display performance by including the above-described color filter.
- a color filter according to an embodiment of the present invention includes a pixel including a plurality of colored layers on a transparent substrate.
- the power that includes a combination of red, green, blue (RGB) and a combination of yellow, magenta, cyan (YMC) as a plurality of colors
- the color filter according to an embodiment of the present invention is a color filter having a green colored layer ( That is, it is particularly preferably applied to RGB).
- the present inventors have found that the liquid crystal alignment defect of the horizontal electric field type liquid crystal display device and It has been found that the switching threshold deviation is mainly caused by the dielectric properties of the colored layer material. Specifically, this phenomenon can be explained using the value of dielectric loss tangent, and is considered to be due to the following mechanism.
- the dielectric loss tangent (tan ⁇ ) is the ratio between the amount of charge accumulated in the dielectric and the amount of charge consumed. If the dielectric loss tangent is relatively small, the charge stored in the dielectric is retained, whereas if it is relatively large, the charge is consumed and not retained.
- FIG. 1 is a schematic cross-sectional view of a horizontal electric field type liquid crystal display device.
- Horizontal electric field LCD The display device 20 has a structure in which a liquid crystal layer 7 is sandwiched between a color filter 10 formed by forming a colored layer 2 on a transparent substrate la and a transparent substrate lb, and a pixel electrode on the transparent substrate lb side. Both 4 and common electrode 5 are provided. Note that polarizing plates 3a and 3b are arranged on the outer surfaces of the transparent substrates la and lb.
- the colored layer 2 constituting the pixel of the color filter 10 is disposed so as to face inward between a pair of opposing substrates 1 and 1, Present in the liquid crystal drive electric field 6. Therefore, in a color liquid crystal display device of a horizontal electric field type, if the value of the dielectric loss tangent of the colored layer 2 and the dielectric loss tangent of other cell members (liquid crystal, alignment film, etc.) differ greatly, the charge of liquid crystal molecules is retained. The phenomenon that the state becomes non-uniform occurs.
- the dielectric loss tangent of the material of the colored layer 2 constituting the pixel of the color filter 10 is an important characteristic that determines the display characteristics of the horizontal electric field type liquid crystal display device. Dielectric loss tangent is a value that depends on the measurement frequency. The force that one frame of the liquid crystal drive is about 60 Hz, the force (period), that is, the frequency is around 30 Hz, roughly 10 to: The dielectric loss tangent at the LOOHz frequency It is appropriate to pay attention.
- FIGS. 2, 3, and 4 show the measurement results of the dielectric loss tangent of several kinds of colored layer materials used in the conventional color filter.
- the dielectric loss tangent of each color layer constituting the pixel of the conventional color filter is in the range of 10 Hz to LOOHz, and shows a value of about 0.006 to 0.2 depending on the type of the color layer material.
- Fig. 3 in particular, there are many materials with a large dielectric loss tangent in the green colored layer material.In fact, at least in the green colored layer, poor pixel alignment is required unless an overcoat layer is provided at the boundary with the liquid crystal sandwich surface , Threshold deviations, etc. were likely to occur remarkably.
- liquid crystal materials, alignment film materials, etc. have a large ability to retain electric charges, that is, liquid crystal materials, alignment film materials, etc. are materials having a relatively small dielectric loss tangent, and their values are usually 0.005-0.
- the value is about 02. Therefore, it is considered preferable that the dielectric loss tangent value of the colored layer material provided in the force filter used in the horizontal electric field type liquid crystal display device is approximately the same value as the dielectric loss tangent of the liquid crystal material or the alignment film material. It is done.
- the present inventors in a color filter for a liquid crystal display device with multiple colors, have a dielectric loss tangent of a colored layer constituting a pixel of the color filter of about 0.03 or less in the range of 10 Hz to: LOOHz. Further, it has been found that by setting the ratio to 0.02 or less, it is possible to effectively prevent deterioration in display quality such as pixel orientation failure and threshold shift without providing an overcoat layer on the pixel. The lower the dielectric loss tangent of the colored layer, the better. However, the lower limit is about 0.005-0.006 at the present time due to the characteristics of the material of the colored layer.
- the relative permittivity of the colored layer is 5.0 or less in the frequency range of 10 Hz to 100 Hz in the color filter according to the embodiment of the present invention. It has been found that it is preferable.
- the relative permittivity is an index of the amount of charge accumulated in the dielectric. If the value is significantly large in the colored layer, the balance of the amount of charge accumulated between the members in the cell (liquid crystal, alignment film, etc.) is large. When the image is burned out due to collapse or threshold shift, display failure occurs.
- the relative dielectric constant of the colored layer constituting the pixel of the color filter is preferably 5.0 or less, more preferably 4.5 or less at a frequency of 10 Hz to: LOOHz.
- a lower dielectric constant is preferable, but due to material properties, the lower limit is about 3.0 at this point.
- the dielectric tangent is high, and the concentration of the component green pigment is less than a certain value relative to the solid content of the colored layer of the color filter, that is, 30 It is mentioned that it is made into weight% or less.
- improving the purity of the pigment also acts to reduce the dielectric loss tangent of the pigment itself.
- Another means for obtaining a colored layer having a dielectric loss tangent of 0.03 or less in the range of 10 Hz to 100 Hz is to use a resin material having a low dielectric loss tangent.
- the surface of the colored layer of the color filter is preferably flat. This is to avoid disturbing the alignment of the liquid crystal molecules.
- the transparent protective layer does not exist on the colored layer and the colored layer is in contact with the liquid crystal through a very thin polyimide alignment film, the flatness of the surface of the colored layer is even more important. For this reason, the surface step of the color filter is 0.
- a light shielding layer having a lattice pattern that is, a black matrix layer is first formed on a glass transparent substrate, and then a colored layer of each color is formed.
- this light-shielding film has a thickness of about 1.0 to 1.5 m when it is a black resin matrix mainly composed of black resin and black pigment.
- the thickness of the colored layer tends to be a protruding portion having a considerable height at the overlapping portion due to the force of 1.0 to 3. O / zm.
- the coloring layer material is designed so that the end of the coloring layer has a gentle inclination, thereby suppressing the protrusion of the coloring layer at the overlapping portion of the resin black matrix layer and the coloring layer. can do.
- the protrusion can be suppressed by increasing the thickness of the colored layer with respect to the thickness of the resin black matrix layer.
- the protrusion can be suppressed by making the overlapping portion of the colored layer and the succinic black bear tritas layer as small as possible.
- the protruding portion can be erased by polishing the surface of the colored layer and scraping the protruding portion.
- a polishing method for example, mechanical polishing using a flat plate polishing machine or an Oscar type polishing machine can be used.
- the alignment film is mainly made of polyimide resin, and is formed by applying polyimide resin or a precursor thereof dissolved in some solvent by means of screen printing, flexographic printing, etc., drying and heat-curing. Is common
- NMP N-methyl-2 -Pyrrolidinone
- ⁇ -petite ratatones are generally used as a solvent for dissolving polyimide resin or its precursor.
- the surface of the color filter is not sufficiently wettable with these solvents, and when the alignment film coating liquid is applied to the surface of the color filter, a portion where the alignment film is not formed partially or entirely occurs. This may cause problems with the liquid crystal display.
- the wettability of the solvent can be secured by the transparent protective layer.
- the transparent protective layer is omitted in the present invention, such a situation cannot be expected. Therefore, the colored layer of the force filter itself must have satisfactory wettability to the solvent.
- the contact angle of the surface of the colored layer with water is set to 65 ° or less, the wettability to the polyimide solvent can be ensured.
- the contact angle is preferably 55 ° or less, more preferably 45 ° or less.
- the contact angle with water can be reduced to 65 ° or less.
- a surfactant is generally added to the coating material for forming the colored layer in order to ensure proper coating in the coating process, but the contact angle with water is set to 65 ° by setting the amount to be low. It can be:
- the addition amount is preferably 0.001 to 0.2% by weight, more preferably 0.005 to 0.1% by weight, based on the coating material for forming the colored layer.
- the surfactant used will be described later.
- a color filter according to an embodiment of the present invention includes a pixel including a plurality of colored layers on a transparent substrate. Multiple colors include the combination of red, green and blue (RGB) and the combination of yellow, magenta and cyan (YMC).
- RGB red, green and blue
- YMC yellow, magenta and cyan
- the color filter of the present invention can be used for color filters with a green colored layer (ie, RGB). Especially applicable
- a color filter according to an embodiment of the present invention is incorporated in a liquid crystal display device with a pixel formation surface facing the liquid crystal.
- An alignment film is formed on the pixels as necessary.
- the influence of the electrical characteristics of the colored layer is the liquid crystal drive. Since it does not reach the dynamic electric field, it is not necessary to provide an overcoat layer that covers the colored layer, which leads to a reduction in yield and cost.
- the distance between the liquid crystal and the pixel is closer, the viewing angle is improved, and a high-definition liquid crystal display device can be provided.
- the color filter according to the embodiment of the present invention does not require an overcoat layer on the pixel in order to supplement the electrical characteristics of the colored layer.
- a resin layer can be provided for purposes other than supplementing electrical characteristics.
- the thickness as in the conventional overcoat layer is not necessary.
- the transparent substrate used in the color filter according to an embodiment of the present invention preferably has a certain transmittance for visible light, and more preferably has a transmittance of 80% or more.
- a plastic substrate such as PET or a glass substrate, which is generally used for a liquid crystal display device, may be mentioned, but a glass substrate is usually preferable.
- a light shielding pattern it is sufficient to use a known method in which a pattern made of a metal thin film such as chrome or a light shielding resin is formed on a transparent substrate.
- any of a known inkjet method, printing method, photolithographic method, etching method, and the like can be employed.
- a colored composition in which a pigment is dispersed in a transparent resin together with a photoinitiator and a polymerizable monomer in an appropriate solvent is formed on a transparent substrate.
- the photosensitive colored composition layer is formed by coating and film formation, and the process of forming a colored layer of one color by pattern exposure and development of this photosensitive colored composition layer is repeated for each color to produce a plurality of colors.
- a photolithographic method for producing a color filter having a pixel composed of a colored layer is preferred.
- a pigment as a colorant is dispersed in an appropriate solvent together with a photoinitiator and a polymerizable monomer in a transparent resin to prepare a photosensitive coloring composition.
- a dispersion method there are various methods using a mill base, a triple roll, a jet mill and the like, and there is no particular limitation.
- organic pigments that can be used as a colorant in the photosensitive coloring composition are as follows. Is indicated by the color index number.
- red coloring compositions for forming red filter segments include C. I. Pigment Red 7, 9, 14, 41, 48: 1, 48: 2, 48: 3, 48: 4, 81: 1, 81: 2, 81: 3, 97, 122, 123, 146, 149, 168, 177, 178, 179, 180, 184, 185, 187, 19 2, 200, 202, 208, 210 215, 216, 217, 220, 223, 224, 226, 227, 228, 240, 246, 254, 255, 264, 272, 279, etc.
- a yellow pigment and an orange pigment can be used in combination with the red coloring composition.
- Green pigments such as C. I. Pigment Green 7, 10, 36, and 37 can be used as the green coloring composition for forming the green filter segment.
- the green coloring composition can be used in combination with the same yellow pigment as the red coloring composition.
- Blue coloring compositions for forming blue filter segments include, for example, CI Pigment Blue 15, 15: 1, 15: 2, 15: 3, 15: 4, 15: 6, 16, 22, 60. 64, 80, etc., preferably CI Pigment Blue 15: 6.
- purple pigments such as CI Pigment Violet 23, CI Pigment Violet 1, 19, 23, 27, 29, 30, 32, 37, 40, 42, 50, etc., preferably CI Pigment Violet 23 can do.
- an inorganic pigment in combination with the organic pigment, can be used in combination in order to ensure good coatability, sensitivity, developability and the like while balancing saturation and lightness.
- Inorganic pigments include yellow lead, zinc yellow, red bean (red acid iron (III)), cadmium Examples include metal oxide powders such as red, ultramarine blue, bitumen, chromium oxide green, and cobalt green, metal sulfide powder, and metal powder.
- a dye can be contained within a range that does not lower the heat resistance.
- the transparent resin that can be used in the coloring composition is a resin having a transmittance of preferably 80% or more, more preferably 95% or more in the entire wavelength region of 400 to 700 nm in the visible light region.
- the transparent resin includes thermoplastic resin, thermosetting resin, and photosensitive resin. If necessary, the transparent resin can be used alone or in admixture of two or more monomers or oligomers which are precursors thereof, which are cured by radiation irradiation to produce transparent resin.
- thermoplastic resin examples include petital resin, styrene monomaleic acid copolymer, chlorinated polyethylene, chlorinated polypropylene, polyvinyl chloride, salt butyl-vinyl acetate copolymer, poly Vinyl acetate, polyurethane resin, polyester resin, acrylic resin, alkyd resin, polystyrene, polyamide resin, rubber resin, cyclized rubber resin, cellulose, polyethylene, polybutadiene, polyimide resin Etc.
- thermosetting resin examples include epoxy resin, benzoguanamine resin, rosin-modified maleic acid resin, rosin-modified fumaric acid resin, melamine resin, urea resin, phenol resin, and the like. .
- a linear polymer having a reactive substituent such as a hydroxyl group, a carboxyl group, or an amino group has a reactive substituent such as an isocyanate group, an aldehyde group, or an epoxy group (meta
- a resin having a photopolymerizable group such as a (meth) atalyloyl group or a styryl group introduced into the linear polymer by reacting an acrylic compound or keihynic acid is used.
- linear polymers containing acid anhydrides such as styrene-hydrous maleic acid copolymers and ⁇ -olefin-maleic anhydride copolymers have hydroxyl groups such as hydroxyalkyl (meth) acrylates (meth).
- acid anhydrides such as styrene-hydrous maleic acid copolymers and ⁇ -olefin-maleic anhydride copolymers
- hydroxyl groups such as hydroxyalkyl (meth) acrylates (meth).
- a half-estered product with Atari Louis compound is also used.
- Polymerizable monomers and oligomers that can be used include methyl (meth) acrylate, ethyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate.
- (meth) acrylates such as (meth) acrylate, tricyclodehydryl (meth) acrylate, ester acrylate, (meth) acrylate of methylolated melamine, epoxy (meth) acrylate, urethane acrylate and the like Methacrylic acid ester, (meth) acrylic acid, styrene, butyl acetate, hydroxyethyl butyl ether, ethylene glycol dibutyl ether, pentaerythritol tribule ether, (meth) acrylamide, N hydroxymethyl (meth) acrylamide, N buformamide , Acrylonitrile, etc.
- Methacrylic acid ester (meth) acrylic acid, styrene, butyl acetate, hydroxyethyl butyl ether, ethylene glycol dibutyl ether, pentaerythritol tribule ether, (meth) acrylamide, N hydroxy
- Photopolymerization initiators include 4-phenoxydichloroacetophenone, 4-t-butyl monodichloroacetophenone, diethoxyacetophenone, 1- (4-isopropylphenyl) 2-hydroxy-1, 2-methylpropane mono 1-one, 1-hydroxycyclohexyl phenyl ketone, 2-benzyl-1, 2-dimethylamino 1- (4-morpholinophenol) butane 1-one and other acetophenone compounds, benzoin, benzoin methyl ether, Benzoin compounds such as benzoinethyl ether, benzoin isopropyl ether and benzyldimethyl ketal, benzophenone, benzoylbenzoic acid, methyl benzoylbenzoate, 4-phenol-penzophenone, hydroxybenzophenone, acrylic benzophenone, 4-benz
- photopolymerization initiators can be used alone or in combination.
- the amount of the photopolymerization initiator used is preferably 0.5 to 50% by weight, more preferably 3 to 30% by weight, based on the total solid content of the coloring composition.
- the coloring composition triethanolamine, methyl jetanolamine, triisopropanolamine, methyl 4-dimethylaminobenzoate, ethyl 4-dimethylaminobenzoate, isoamyl 4-dimethylaminobenzoate, as sensitizers, Benzoic acid 2 Dimethylaminoethyl, 4-Dimethylaminobenzoic acid 2 Ethylhexyl, N, N Dimethylbalatoluidine 4, 4, -bis (dimethylamino) benzophenone, 4, 4, -bis (jetylamino) benzophenone, 4, 4 It can be obtained by covering amine compounds such as bis (ethylmethylamino) benzophenone.
- sensitizers can be used alone or in combination of two or more.
- the amount of the sensitizer used is preferably 0.5 to 60% by weight, more preferably 3 to 40% by weight, based on the total amount of the photopolymerization initiator and the sensitizer.
- the coloring composition contains a polyfunctional thiol that functions as a chain transfer agent.
- the polyfunctional thiol may be a compound having two or more thiol groups. For example, hexanedithiol, decanedithiol, 1,4 butanediolebisthiopropionate, 1,4 butanediolbisthioglycolate, ethylene Glycol bisglycolate, ethyleneglycololebisthiopropionate, trimethylolpronristoglycolate, trimethylolpropane tristhiopropionate, trimethylolpropane tris (3-mercaptobutyrate), pentaerythritol tetrakisthio Glycolate, pentaerythritol tetrakisthiopropionate, trimercaptopropionic acid tris (2hydroxyethyl) isocyanurate, 1,4 dimethylmercaptobenzene, 2, 4,
- polyfunctional thiols can be used alone or in combination.
- the amount of multifunctional thiol used is preferably 0.1 to 30% by weight, more preferably 1 to 20% by weight, based on the total solid content of the coloring composition. If the amount is less than 1% by mass, the effect of adding a polyfunctional thiol is insufficient. If the amount exceeds 30% by mass, the sensitivity is too high, and the resolution decreases.
- the coloring composition may contain an organic solvent, if necessary.
- the organic solvent include cyclohexanone, ethyl acetate sorb acetate, butyl acetate sorb acetate, 1-methoxy 2-propyl acetate, diethylene glycol dimethyl ether, ethino benzene, ethylene glycono leseno enoate, xylene, ethino cerero sonoleb, Examples include methyl-n-amyl ketone, propylene glycol monomethyl ether toluene, methyl ethyl ketone, ethyl acetate, methanol, ethanol, isopropyl alcohol, butanol, isobutyl ketone, and petroleum solvents. These may be used alone or in combination.
- the coloring composition may contain a surfactant as necessary.
- Surfactants include sodium lauryl sulfate, polyoxyethylene alkyl ether sulfate, sodium dodecylbenzene sulfonate, alkali salt of styrene acrylic acid copolymer, sodium stearate, sodium alkyl naphthalene sulfonate, alkyl diphenyl ether disulfone.
- On-active surfactant polyoxyethylene oleyl ether, polyoxyethylene lauryl ether, polyoxyethylene nonyl phenyl ether, polyoxyethylene alkyl ether phosphate ester, polyoxyethylene sorbitan monostearate, polyethylene glycol monolaurate , Polyether-modified dimethylpolysiloxane, polyether-modified polydimethylsiloxane, polymethylalkylsiloxane, polyester-modified polymethylalkylsiloxane, polyether-modified polysiloxane
- Nonionic surfactants such as methyl alkyl siloxane and aralkyl-modified polymethyl alkyl siloxane; alkyl quaternary ammonium salts and chaotic surfactants such as their ethylene oxide adducts; alkyl dimethylamino acetate betaine, etc.
- amphoteric surfactants such as alkylbetaines and alkylimidazolines, which can be used
- a photosensitive coloring composition containing the above components is applied onto a transparent substrate and pre-baked.
- spin coating, dip coating, die coating and the like are not limited to these methods as long as they can be applied with a uniform film thickness on a substrate having a force of about 40 to 60 cm square.
- the prebeta is preferably performed at 50 to 120 ° C. for about 10 to 20 minutes.
- the coating thickness is arbitrary, but considering the spectral transmittance, the thickness after pre-beta is usually about 2 ⁇ m.
- the photosensitive coloring composition layer thus formed on the substrate is exposed through a pattern mask.
- a normal high-pressure mercury lamp as the light source.
- the exposed photosensitive coloring composition layer is developed.
- an alkaline aqueous solution is used as the developer.
- the alkaline aqueous solution include a sodium carbonate aqueous solution, a sodium hydrogen carbonate aqueous solution, a mixed aqueous solution of the two, or a mixture obtained by adding an appropriate surfactant to them. After development, it is washed with water and dried to obtain a colored layer of any one color.
- Red, blue and green coloring compositions were prepared as follows.
- Red coloring composition [0082]
- a mixture having the following composition was uniformly stirred and mixed, then dispersed in a sand mill for 5 hours using a glass bead having a diameter of 1 mm, and then filtered through a 5 m filter to prepare a red pigment dispersion.
- Red pigment C. I. Pigment Red 254
- Red pigment C. I. Pigment Red 177
- Blue coloring composition A mixture having the following composition was uniformly stirred and mixed, then dispersed in a sand mill for 5 hours using a glass bead having a diameter of 1 mm, and then filtered through a 5 m filter to prepare a blue pigment dispersion.
- Blue pigment C. I. Pigment Blue 15
- a mixture having the following composition was uniformly stirred and mixed, then dispersed in a sand mill for 5 hours using glass beads having a diameter of 1 mm, and then filtered through a 5 m filter to prepare a green pigment dispersion.
- Green pigment C. I. Pigment Green 36
- Dispersant (“Disperbyk-163" manufactured by Big Chemi Company) 2 parts Acrylic varnish (solid content 20%) 102 parts
- a green colored composition 2 was prepared in the same manner as the green colored composition 1 except that 122 parts of a green pigment dispersion was prepared at the following ratio.
- Green pigment C. I. Pigment Green 36 12 parts
- Dispersant (“Disperbyk-163” manufactured by Big Chemi Company) 2 parts
- CI Pigment Green 36 (“Lionol Green 6YK” manufactured by Toyo Ink Mfg. Co., Ltd.) as a green pigment is diffused in 100 times the weight of pure water, stirred for 6 hours, and filtered (with washing treatment).
- a green colored composition 3 was prepared in the same manner as the green colored composition 1 except that 142 parts of a green pigment dispersion was prepared and used in the following ratio.
- Green pigment 24 parts of C. I. Pigment Green 36
- Dispersant (“Disperbyk-163” manufactured by Big Chemi Company) 4 parts
- a green colored composition 4 was prepared in the same manner as the green colored composition 1, except that a green pigment dispersion was prepared at the following ratio and used in 155 parts. [0091] Green pigment: CI Pigment Green 36 32 parts
- Dispersant (“Disperbyk-163” manufactured by Big Chemi Company) 5 parts
- a green colored composition 5 was prepared in the same manner as the green colored composition 1, except that a green pigment dispersion was prepared at the following ratio and used in 168 parts.
- Green pigment 40 parts of C. I. Pigment Green 36
- Dispersant (“Disperbyk-163” manufactured by Big Chemi Company) 6 parts
- a color filter was prepared in the following manner.
- the green coloring compositions 1 to 5 were used as the green coloring composition, and examples 1 to 3 and comparative examples 1 and 2 were used.
- a red colored composition was applied to a glass substrate by spin coating so as to have a film thickness of 2 ⁇ m. After drying, a striped pattern was exposed with an exposure machine and developed with an alkaline developer for 90 seconds to form a striped red colored layer on the transparent substrate.
- the alkaline developer has the following composition. In the following examples and comparative examples, development is performed using this alkaline developer.
- Anionic surfactant 8.0% by weight
- the green coloring composition is similarly applied by spin coating so that the film thickness is 2 m, dried, and then the striped colored layer is shifted from the red colored layer by the exposure machine.
- the green colored layer was formed adjacent to the above-mentioned red colored layer by exposing to a spot and developing.
- a blue colored layer was formed adjacent to the red colored layer and the green colored layer with a film thickness of 2 m for the blue colored composition.
- a color filter having pixels composed of three colored stripe layers of red, green, and blue on a transparent substrate was obtained.
- compositions of the green coloring compositions 1 to 5 used for the production of the color filter are shown in the following Table 1, and the color filters of Examples 1 to 3 and Comparative Examples 1 and 2 have green pigments in the coloring layer.
- a comparison of the concentration with respect to the solid content is shown in Table 2 below.
- Example 1 the green pigment Pigment Green 36 is 24.1% in the solid content, Example 2 is 19.9%, Example 3 is 29.9%, and Comparative Example 1 is 34.3%. Comparative Example 2 is 37.6%.
- Fig. 5 shows a graph in which the dielectric loss tangent is plotted against the concentration of the green pigment in the solid content in the colored layer. The value at 20 Hz was used as the representative value for the dielectric loss tangent.
- the value of the dielectric loss tangent depends greatly on the pigment concentration.
- the dielectric loss tangent greatly exceeds 0.03, and the dielectric loss tangent is about 20 wt%. The result could be about 0.02.
- the green pigment that had been subjected to the cleaning treatment even about 30 wt%, it was possible to reach about 0.025.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US11/783,052 US20080043180A1 (en) | 2004-10-12 | 2007-04-05 | Color filter and liquid display device provided with color filter |
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JP2004-297292 | 2004-10-12 | ||
JP2004297292A JP2006113099A (ja) | 2004-10-12 | 2004-10-12 | カラーフィルタ |
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US11/783,052 Continuation US20080043180A1 (en) | 2004-10-12 | 2007-04-05 | Color filter and liquid display device provided with color filter |
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WO2006041044A1 true WO2006041044A1 (ja) | 2006-04-20 |
Family
ID=36148337
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PCT/JP2005/018664 WO2006041044A1 (ja) | 2004-10-12 | 2005-10-07 | カラーフィルタ及びそれを備える液晶表示装置 |
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US (1) | US20080043180A1 (ja) |
JP (1) | JP2006113099A (ja) |
KR (1) | KR100891394B1 (ja) |
CN (1) | CN100472247C (ja) |
TW (1) | TW200619688A (ja) |
WO (1) | WO2006041044A1 (ja) |
Cited By (3)
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JP2008299080A (ja) * | 2007-05-31 | 2008-12-11 | Toppan Printing Co Ltd | カラーフィルタ及び液晶表示装置 |
JP2009092952A (ja) * | 2007-10-09 | 2009-04-30 | Toppan Printing Co Ltd | 感光性着色組成物、これを用いたカラーフィルタ、及び液晶表示装置 |
JP2013149592A (ja) * | 2011-12-22 | 2013-08-01 | Toyo Ink Sc Holdings Co Ltd | 有機el表示装置用着色膜、着色膜セット、カラーフィルタ、および有機el表示装置 |
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JP4867466B2 (ja) * | 2006-05-12 | 2012-02-01 | 凸版印刷株式会社 | カラーフィルタ及びそれを用いた液晶表示装置 |
JP2007322731A (ja) * | 2006-05-31 | 2007-12-13 | Toppan Printing Co Ltd | カラーフィルタの製造方法 |
JP2009163014A (ja) * | 2008-01-07 | 2009-07-23 | Toppan Printing Co Ltd | 液晶表示装置及び液晶表示装置用カラーフィルタ |
CN101952769A (zh) * | 2008-02-13 | 2011-01-19 | 凸版印刷株式会社 | 滤色器以及使用其的液晶显示装置 |
JP2009198548A (ja) * | 2008-02-19 | 2009-09-03 | Toppan Printing Co Ltd | カラーフィルタ及びそれを用いた液晶表示装置 |
JP2009229826A (ja) * | 2008-03-24 | 2009-10-08 | Toppan Printing Co Ltd | カラーフィルタとそれを備えた液晶表示装置 |
JP5212447B2 (ja) * | 2010-10-28 | 2013-06-19 | 凸版印刷株式会社 | カラーフィルタ基板およびこれを用いたフリンジフィールド・スイッチング方式液晶表示装置 |
KR102141593B1 (ko) | 2014-01-17 | 2020-08-06 | 삼성디스플레이 주식회사 | 액정 표시 장치 |
KR102067857B1 (ko) * | 2016-04-08 | 2020-01-17 | 주식회사 엘지화학 | 잉크젯 프린팅을 이용한 베젤 패턴의 형성 방법 |
TWI642687B (zh) * | 2016-05-24 | 2018-12-01 | 住華科技股份有限公司 | 彩色光阻組成物之介電常數損失率的檢測方法 |
CN107450268B (zh) * | 2016-05-30 | 2021-03-16 | 住华科技股份有限公司 | 彩色光刻胶组成物及其介电常数损失率的检测方法 |
CN114839815A (zh) * | 2021-02-01 | 2022-08-02 | 中强光电股份有限公司 | 显示装置 |
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JP2000192040A (ja) * | 1998-12-25 | 2000-07-11 | Toshiba Corp | 液晶表示装置 |
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JP3598545B2 (ja) * | 1994-10-27 | 2004-12-08 | セイコーエプソン株式会社 | カラーフィルタ、ブラックマトリックス、表示装置、アクティブマトリックス型液晶表示装置、及びその製造方法 |
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-
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- 2005-10-06 TW TW094134901A patent/TW200619688A/zh unknown
- 2005-10-07 CN CNB2005800346598A patent/CN100472247C/zh not_active Expired - Fee Related
- 2005-10-07 WO PCT/JP2005/018664 patent/WO2006041044A1/ja active Application Filing
- 2005-10-07 KR KR1020077008230A patent/KR100891394B1/ko not_active IP Right Cessation
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2007
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JP2009092952A (ja) * | 2007-10-09 | 2009-04-30 | Toppan Printing Co Ltd | 感光性着色組成物、これを用いたカラーフィルタ、及び液晶表示装置 |
JP2013149592A (ja) * | 2011-12-22 | 2013-08-01 | Toyo Ink Sc Holdings Co Ltd | 有機el表示装置用着色膜、着色膜セット、カラーフィルタ、および有機el表示装置 |
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Also Published As
Publication number | Publication date |
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TW200619688A (en) | 2006-06-16 |
CN101040200A (zh) | 2007-09-19 |
KR20070052345A (ko) | 2007-05-21 |
US20080043180A1 (en) | 2008-02-21 |
CN100472247C (zh) | 2009-03-25 |
JP2006113099A (ja) | 2006-04-27 |
KR100891394B1 (ko) | 2009-04-02 |
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