JPS61252501A - Manufacture of multicolor color filter - Google Patents

Abstract

PURPOSE:To form easily a multicolor color filter by repeating a process for forming a color element of one desired color, at every desired color, and also so that each color element is not superposed to each other. CONSTITUTION:A transparent supporting body 4 for a multicolor color filter is made to adhere closely to the first transfer layer 3a of the first transfer medium 1a, and the first color element 3'a is formed by irradiating a laser beam. When the second transfer layer 3b of the second transfer medium 1b is made to adhere closely to the color element 3'a surface, and the laser beam is scanned and irradiated so that it is not superposed to the first color element 3'a the second color element 3'b is formed on the transparent supporting body 4. When the third transfer layer 3c of the third transfer medium 1c is made to adhere closely to the surface of the color element 3'a and 3'b, and the laser beam is scanned and irradiated so that it is not superposed to the first and the second color elements 3'a, 3'b, the third color element 3'c is formed on the transparent supporting body 4, and a multicolor color filter 5 having three kinds of desired color elements 3'a, 3'b and 3'c is obtained. In this way, the multicolor color filter can be manufactured easily.

Description

[Detailed Description of the Invention] Technical Field The present invention is applicable to applications such as oblique light flux limiting, displays, optical conversion elements, facsimiles, main tube color cameras, solid color cameras, and color electrophotography. The present invention relates to a method for manufacturing a multicolor color filter.

Conventional multicolor color filters have multiple desired colors, such as red, red, etc., on a transparent support such as a glass plate or plastic film.
Blue and green color elements are arranged in a predetermined shape (usually in a mosaic shape) so that they do not overlap each other, and are used in various optical devices that require color. Known methods for manufacturing such multicolor filters include a method of dyeing a hydrophilic resin layer and a method of utilizing multilayer interference Mt. The former method is PVA.

A photosensitive resin layer was formed by applying a photosensitive resin prepared by adding dichromate, chromate, or diazo compound as a photosensitizer to a hydrophilic resin such as polyvinylzerolidone, gelatin, casein, or glue onto a support. After that, a mask with openings/arm turns of a predetermined shape is placed on this layer, exposed to light, developed, and plate-made to form a colored resin layer, and then this resin layer is dyed with red, blue, or green dye. When forming the first color element, and further forming the second and third color elements, the method of forming the first color element is performed using an interlayer for resist dyeing made of a hydrophobic resin. It is about performing an operation.

On the other hand, the latter method uses MgF, 810. With low refractive index materials such as Z r 01 , C* false, T i O@
, and a high refractive index material such as ZnS, are alternately coated with a high refractive index material such as 6
A resist layer having an open pattern of a predetermined shape is formed using a plate-making technique on the multilayer interference film formed by depositing ~20 layers, and then dry etching is performed to form a first color element.
This operation is repeated for the second and third color elements.

However, the former method requires a plate-making process for the photosensitive resin layer and an intermediate layer for resisting each color element, while the latter method requires a plate-making process for the resist layer and a low refractive index layer and a high-refractive index layer in the multilayer interference film. Manufacturing is extremely difficult because it is necessary to strictly control the thickness of the refractive index layer and stack several to several dozen layers.

For this reason, there has been a demand for a simple method for manufacturing multicolor color filters.

OBJECTIVES It is an object of the present invention to provide a method for easily manufacturing multicolor color filters by thermally transferring a plurality of types of transfer media, each having a desired color, onto each color element using laser light. .

Structure: The method for producing a multicolor color filter of the present invention consists of forming a colorant having one of a plurality of desired colors on a transparent or opaque support and a heat-fusible fixing or linear layer material as main components. A transfer layer of transparent support B is provided on the transfer layer of the transfer medium.
ft and irradiate laser light in a predetermined shape from the transfer medium or support B side to form color elements of the desired one color for each desired color and so that the color elements do not overlap each other. It is characterized by repeating.

The method for manufacturing a multicolor color filter of the present invention will be explained using an example in which three types of color elements are formed.

In this case, a transfer layer containing a colorant having a first tenth color out of three desired colors is used as a first transfer layer, and a transfer medium t-a first transfer medium having this first transfer layer, also a second transfer medium. A transfer layer t containing a colorant having a third color - a second transfer layer, a transfer medium having this second transfer layer being a second transfer medium, and a transfer layer containing a colorant having a third color also being a third transfer layer A transfer medium having this third transfer layer is referred to as a third transfer medium.

In Figure g1, first the first transfer layer 3a of the first transfer medium la
(2 is a transparent or opaque support) A transparent support 4 for a multicolor color filter is closely attached to the side of the first transfer medium 1a (however, in this case, a transparent support 2 is used as the support 2).

The same applies below) or the laser beam (indicated by hν) is emitted from the side of the transparent support 4 in a predetermined shape (for example, micro mosaic shape, halftone dot shape).
When the image is scanned and irradiated [FIG. 1(a)), the first transfer layer 3a in the irradiated area is heated and melted or transferred by sublimation onto the transparent support 4, and the first color element is formed on the transparent support 4. 3'a
is formed [Fig. 1(b)]. Next, this first color element 3
The color element 3' of the transparent support 4 having at 'a' is in close contact with the second transfer layer 3b of the second transfer medium ib on the a side, and from the second transfer medium ib side or the transparent support 4 side, the transparent support When the laser beam is scanned and irradiated in a predetermined shape so as not to overlap with the ninth color element 3'a already formed on the color element 4 (see Fig. 1(,)), the second transfer layer 3b in the irradiated area is heated. The transparent support 4 is transferred by melting or sublimation onto the transparent support 4.
A second color element 3'b is formed on top [Fig. 1(d)]
]. Furthermore, this first color element 31m and second color element 3'
The third transfer layer 3c of the third transfer medium 1c is brought into close contact with the color elements 3'a and 3'b surfaces of the transparent support 4 having bt, and from the third transfer medium la side or the transparent support 4 side, The first and second color elements 3' already formed on the transparent support 4
When the laser beam is scanned and irradiated in a predetermined shape so as not to overlap with a and 3'b [Fig. The thirtieth color element a' is transferred by melting or sublimation onto the transparent support 4.
c is formed [FIG. 1(f)], and thus a multicolor color filter 5 having three desired color elements 3'a, 3'b and 3'e t'' is obtained. The apparatus for this purpose is shown in FIG. (vacuum chamber)) is an example.

Next, members, materials, etc. used in the present invention will be explained.

First, the transfer medium is basically a transparent or opaque support, as described above, on which a transfer layer mainly composed of a colorant having a desired color and a heat-fusible fixing or binding substance is provided. be. Here, examples of the transparent or opaque support include glass plates; quartz plates (including synthetic products); plastic films, sheets, or boards; paper; metal plates, etc., but transparent products such as plastic and glass are preferable; The coloring agent used in the transfer layer is particularly preferably a plastic type (e.g., polyester, polyethylene, polypropylene, cyclohexyl methacrylate, gelatin, hydroxyethyl cellulose% I ribinyl petyral, polystyrene, polyvinyl alcohol, acetyl cellulose, polymethyl methacrylate, polycarbonate). They may be organic or inorganic, and organic dyes such as azo, anthraquinone, phthalocyanine, carbonium, quinone imine, methine, nitro, nitroso, and naphthalimide dyes or organic dyes may be used. Examples of inorganic pigments include cobalt-based, iron-based, chromium-based, manganese-based, copper-based, vanadium-based, mercury-based, lead-based, cadmium-based, and hexacin-based inorganic pigments. In addition, thermofusible fixing agents or binders used in combination with these colorants include long-chain aliphatic alcohols, ketones, carboxylic acids, amides; /4 rough-in; cyclono-arm rough-in; wax; polyethylene;
4 Listyrene: polyamide; polyvinyl chloride; polyvinyl butyral; z Chill cellulose; cellulose acetate (those with a melting point or softening point of 100~
(approximately 200°C), etc. In addition, a laser light absorbing substance can be added to the transfer layer as required. The laser light-absorbing substance may be black, colorless, or light-colored. Black materials include carbon black, carbon graphite, iron oxide powder, etc., and colorless or light-colored materials include bis(aim-1,2- diphenylethylene-i,z-dithiolate) nickel, bis(@
1m-1,2-diphenylethylene-1,2--/thiolet)) I-subdium, bis(1-thio-2-phenolate)nickel-tetrabutylammonium, bis(1-thio-2-naphtholate) Examples include infrared absorbers such as nickel-tetrabutylammonium and bis(1-70ro-3,4-dithioferrate)nickel-tetrabutylammonium. The ratio of the coloring agent to the solidifying agent or binder is generally about 1:0.2 to 10 (by weight), but it can vary depending on the combination of materials.

For example, as a layer agent or binder, the melting point or softening point is 50~
If you choose a product at 100°C (general colorants may be used), the appropriate ratio of the colorant to this low melting point or low softening point fixing agent or binder is about 1:1-10. It is. In this case, the transfer method is mainly thermal melt transfer. Also, sublimable colorants (mainly organic colorants)
and if a single-layer agent or binder with a melting point or softening point of 100C or higher is selected, the ratio of the sublimable colorant to this solidifying agent or binder with a melting point or high softening point. 1: 0.2 to 5 waves is appropriate. In this case,
The transfer format is mainly sublimation transfer. In any case, the appropriate thickness of the transfer layer is 0.2 to 0.5 microns.

In order to improve the transferability of the transfer medium as described above, an intermediate layer can be provided between the support and the transfer layer, if necessary. As the material for the intermediate layer, a water-temperature resin such as PTA or gelatin, and if necessary, a light-absorbing substance as described above is used.

Specific examples of transparent supports for multicolor color filters are the same as those for transfer media.

Lasers include carbon dioxide laser, YAG laser,
H/-N lasers, semiconductor lasers, argon lasers, etc. are used, among them carbon dioxide lasers, YAG lasers, etc.
Heat mode deaf lasers such as lasers and semiconductor lasers are preferred.

The present invention will be explained in detail below using examples. Note that all parts are parts by weight.

Example 1 1 part of carbon black, PVA (average degree of polymerization 1700,
5 parts (saponification degree: 99 mol%) and 100 parts of water were cross-dispersed in a ball mill for several hours, and this was coated and dried on three 50μ thick polyester films using a roll coater to form a 2μ thick film. A middle class was created. Next, each of the compositions IA, IB, and ICi having the formulations shown in the table below was cross-dispersed for 1 hour using a roll coater, and each dispersion was coated on each intermediate layer using a roll coater.
By melt-coating at 130℃ using a 2μ thick transfer layer of red, back, and green colors, three types (IA...
Red, IB...blue, Ic...green) transfer media were made.

Next, the transfer layer of the transfer medium IA was vacuum-adhered to a polymethyl methacrylate sheet with a thickness of 300μ, and the beam diameter was adjusted to l.
Oμ YAG laser beam focused in summer with irradiation amount o, sJ
/c+j from the sheet side in a mosaic shape as shown in Figure 3 (however, the size of one piece M is 100x100μc1i)
A mosaic of red elements was formed on the sheet by irradiation.

Next, the transfer layer of the transfer medium IB is brought into close contact with the red element surface of this sheet under vacuum, and the Y
The sheet was similarly irradiated with AG laser light in a mosaic manner to form all mosaic-like elbow color elements on the sheet. Furthermore, a transfer layer of the transfer medium 1C is vacuum-adhered to the red-blue element surface of this sheet, and the sheet is irradiated with a YAG laser beam in a mosaic manner so as not to overlap with the previous red-blue element, thereby creating a mosaic pattern on the sheet. By forming the green element, the red element R1, the blue element B and the green element G5-3 as shown in FIG.
I made a color filter.

Example 2 Using a roll coater, apply aqueous gelatin to three sheets of 4-50 μm/+7-molar gel and dry to form an intermediate layer of 1 μm in thickness.Each composition consists of the formulations shown in the table below* 2, 2B and 2C are mixed and dispersed in a ball mill for 5 hours, and each dispersion is coated and dried on each intermediate layer using a roll coater to form a transfer layer of each color of red, blue, and green with a thickness of 2μ. Depending on the situation, there are three types (2A...red, 2B...blue, 2C...
- Green) transfer medium was made. Hereinafter, 3 was carried out in the same manner as in Example 1 except that a polyester sheet with a thickness of 150μ was used instead of the polymethyl methacrylate sheet with a thickness of aOOμ.
I made a color filter.

Effects As described above, the method of the present invention does not require a plate-making step for forming/turning into a predetermined shape or a step for forming an intermediate layer interposed between each color element, so that a multicolor color filter can be easily manufactured.

[Brief explanation of drawings]

Fig. 1 is a process diagram for explaining the method of the present invention, Fig. 2 is a diagram of an example of an apparatus for carrying out the present invention, frg3cfi
is an example of the scanning shape of the laser beam used in the example, and the fourth
The figure is a plan view of a three-color filter obtained in an example. 1, la, lb, la...transfer medium 2...transparent or opaque support hr=.laser light 10..
・Laser 11... Optical modulator 1z...
Condensing lens 13...Rotating polygon mirror 14...
Rotating mirror 15...vacuum presentation

Claims (1)

[Claims] 1. A transfer medium in which a transfer layer containing a colorant having one of a plurality of desired colors and a thermofusible fixing agent or binder as main components is provided on a transparent or opaque support A. A transparent support B is closely attached to the transfer layer, and a laser beam is irradiated in a predetermined shape from the transfer medium or support B side to form a color element of one desired color on the support B. A method for manufacturing a multicolor color filter characterized by repeating the process for each color so that each color element does not overlap with each other.