Classifications

• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B5/00—Optical elements other than lenses
  • G02B5/20—Filters
  • G02B5/22—Absorbing filters
  • G02B5/223—Absorbing filters containing organic substances, e.g. dyes, inks or pigments
• • 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
  • G02F1/133516—Methods for their manufacture, e.g. printing, electro-deposition or photolithography

Definitions

• the present invention relates to a color filter used for various display devices, and more particularly, to a color filter for enabling a color display on various display devices. It is about filters.
• liquid crystal display devices are widely used.
• liquid crystal display devices as color displays for displaying peripheral terminals of various devices and for displaying in various instruments, telephones, and television receivers in automobiles has been increasing. Requests are increasing.
• various color liquid crystal display devices have been proposed, and some of them have already been put to practical use.
• Gelatin sludge is formed on the inner surface of a transparent substrate, and the gelatin is stained with acid dye.
• Nitrogen-based fat and oil that can be dyed is formed on the inner surface of a transparent substrate, and this resin layer is dyed with an acid dye.
• a transparent electrode was first formed on the inner surface of a transparent substrate, and the transparent electrode was used as a metal electrode to form a dye layer by an electrodeposition method.
• the heat required for forming the transparent conductive film by the vapor deposition method is the same as in the case of the color filter described above. Cracks are formed, and when deposited at a low temperature, the resistance value of the conductive film increases, and the light transmittance decreases. In addition, there is a problem that the street fat is decomposed, colored and melted. Even in the range of the phoenix degree where these problems do not occur, if the dye dyed on a specific pattern moves to unnecessary parts by heat and mixes, The so-called "pread" phenomenon may occur.
• color filters A and B are both dyed using the photolithography method, the manufacturing process is complicated and costly. When two or more color patterns are formed, components of different colors cannot be formed on the same plane, and the slaughter cannot be made thicker, so that Difficulty staining.
• the color filter C forms a pigment by an electrodeposition method, the types of dyes or pigments that can be used are small, and the types of colors that can be dyed are reduced. There is a limit .
• An object of the present invention is to provide a power filter having excellent performance such as heat resistance and water resistance, having a sharp pattern outline, and capable of expressing various colors. It is here.
• This goal is achieved by the following * configuration according to the invention. That is, * the color filter of the invention is a transparent substrate and the active alumina or active silica formed on the substrate, or both.
• a porous active membrane layer made of a mixture of the above, a colored area or pattern formed by the dyes dyed in the micropores of the active membrane, and dyed with the dye. And a coating for sealing the upper part of the micropores of the active film.
• FIG. 1 is a schematic enlarged longitudinal sectional view of a color filter according to one embodiment of the present invention.
• FIG. 2 is a sectional view schematically showing an example in which the color filter of the invention is used for a liquid crystal display panel.
• FIG. 1 a transparent substrate 1, an active film 2 formed thereon, and a dye 4 are formed by being dyed in a large number of micropores 3 of the active film 2.
• the colored part or pattern 5 and the coating slaughter 6 on the active membrane 2 are shown.
• the transparent substrate 1 which is used for a liquid crystal display device, it is usually good to use a glass substrate.
• the active film 2 formed on the transparent substrate 1 is made of active alumina or active silica or a mixture of both.
• a colloidal alumina or a colloidal silica or a mixture of both is applied to the surface of a transparent substrate and dried. After that, for example, baking at 350 to 850 ° C for 10 to 180 minutes may be performed.
• the active film layer 2 thus obtained is transparent and has a large number of micropores 3 formed thereon, which serves as dyeing.
• the active film layer 2 should have a thickness of 0.5 a to 10 L IB, preferably 1.5 jtt a to 5, a. Desirable. If the thickness of the active layer becomes thicker than this, it becomes easier to whiten and become opaque, and conversely, if the thickness of the active layer becomes thinner, it becomes impossible to use it.
• the dye 4 that forms a colored portion or pattern 5 by being dyed into the pores 3 of the active membrane 2 is a sublimable dye or Z and heat.
• the dye is transferred to a micropore using heat in a glass having a temperature of, for example, 100 to 250 ° C for several seconds. The heating may be carried out for up to 60 minutes, and this temperature varies depending on the type of the dye.
• any of the following methods can be used.
• the mask with the pattern formed is placed on the upper surface of the active film, the transfer material printed with dye is placed on the mask, and the transfer material is heated and pressurized.
• Dye is set in the intaglio cells, and the intaglio cells are brought into close contact with the surface of the active film and heated to transfer the dye in the intaglio cells to the active film layer.
• the methods (1), (2), and (3) are used to uniformly color the entire surface of the active membrane, and the methods (4), (5), (6) ( Method 7) is preferred.
• the pattern formed by dyeing can be appropriately designed according to the intended use, but according to the present invention, a dot pattern is used. Even if there is, it can be easily formed.
• the pattern is a nodal pattern consisting of two or more colors, where the pattern of each color exactly matches the corresponding transparent conductive film pattern. It is formed in.
• the coating layer 6 is formed above the micropores 3 of the active film layer 2 to which the dye has been dyed, in order to close the micropores.
• the coating & is used to convert hard, highly permeable resin such as acrylic, melamin, epoxy, silicone, bohimide resin, etc. to the above-mentioned activity. After being applied on the film layer, it is formed by heating at a temperature such that the resin hardens.
• Coating No. 6 can also be formed by applying and heating an inorganic material such as silicate soda and lithium silicate in addition to the above resin.
• the coating layer 6 is provided to prevent the dye molecules trapped in the micropores of the active layer from re-evaporating and to prevent the dyed portion from being contaminated. .
• the coating layer be formed of a material having excellent adhesion to the material constituting the transparent conductive film.
• FIG. 2 schematically shows an example in which the above-described color filter is used in a liquid crystal display device.
• a transparent electrode 11 a is provided on the surface of the transparent substrate 10, and the color filter of the present invention is passed through a space 13 formed by the spacer 12 on this surface.
• -14 is placed opposite S, and the transparent filter is connected to this color filter 14.
• a polarized light ⁇ 15 is disposed, respectively.
• a g-direction film 16 is provided on the upper surfaces of the transparent electrodes 11a and 11b, respectively.
• the color filter according to the present invention has the following advantages.
• an active film made of active aluminum or activated silica is formed on a transparent substrate, it has a higher heat resistance than a conventional color filter. Excellent in water resistance, water resistance, product resistance, and chemical resistance.
• the dye for forming the colored portion or the pattern is dyed in the independent fine pores of the active film, there is no problem such as bleeding. For this reason, dyes that require relatively high temperatures and long times for coloring can also be used.
• Various colors can be expressed because any dye that can be dyed in the micropores of the active film can be used. be able to. Further, the method of coloring or pattern formation is simple and easy.
• the color filter according to the invention is extremely excellent in heat resistance, water resistance, and chemical resistance, and is relatively easy to manufacture. Therefore, the color filter for liquid crystal display devices and other display devices is used. It can be used extremely effectively as a rough filter.

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Nonlinear Science (AREA)
• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Mathematical Physics (AREA)
• Chemical & Material Sciences (AREA)
• Crystallography & Structural Chemistry (AREA)
• Optical Filters (AREA)
• Liquid Crystal (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

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ID=14186257

Family Applications (1)

Country Status (5)

Cited By (1)

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Citations (5)

Family Cites Families (7)

• 1984
  • 1984-05-14 JP JP59097210A patent/JPS60254001A/ja active Granted
• 1985
  • 1985-05-10 WO PCT/JP1985/000263 patent/WO1985005462A1/ja active IP Right Grant
  • 1985-05-10 EP EP85902165A patent/EP0182914B1/en not_active Expired - Lifetime
  • 1985-05-10 DE DE8585902165T patent/DE3587215T2/de not_active Expired - Fee Related
• 1987
  • 1987-09-01 US US07/093,131 patent/US4744635A/en not_active Expired - Fee Related

Patent Citations (5)

Non-Patent Citations (1)

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