JP2001056405A - Manufacture of color filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need for registration by each one sheet and one each color and to make it possible to manufacture color filters only for the reciprocating time of a movable frame, the rotating time of respective cylinders for coating, transfer and image formation of resins and the handling time of a substrate sheet by continuously laminating respective colors without drying. SOLUTION: The colored resin (ink) is applied on a silicon sheet 2 on the coating cylinder 3 by a coating applicator 4 and this resin is transferred onto a silicone blanket 8 on the blanket cylinder 9. Next, a resin plate is exposed and developed on the plate cylinder and a letterpress 10 formed with projecting parts to a prescribed shape and the resin of the projecting parts is removed from the coating surface on the blanket 8 by pressing the letterpress 10. The remaining resin, on the blanket 8 surface is transferred onto the substrate sheet 5 on a printing surface plate by the movement of the movable frame. A light shielding film and red, green, blue and movable frames are moved back and forth once by this principle, by which the color filters may be manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a color filter for liquid crystal, which is formed simultaneously with a plurality of colors or on a sheet and for transfer.

[0002]

2. Description of the Related Art In a conventional color filter manufacturing method, a glass substrate is mainly used.
Image formation and drying for each color were repeated a predetermined number of times. That is, when forming each layer such as red, green, blue, light shielding film, overcoat, etc.
Image formation and drying were performed for each color.

[0003]

According to such a conventional method, the production apparatus requires a large number of colors and requires enormous equipment costs, which increases the cost. In addition, since each layer is dried, when a resin plate or a sheet having poor dimensional stability is used as a substrate, there is a problem that the registration of each layer is not matched. The present invention solves these problems,
It is possible to manufacture a transfer color filter using a sheet that cannot be manufactured today.

[0004]

Means for Solving the Problems Each color is continuously laminated without drying (wet-on-wet), and in order to prevent the front color from being mixed with the rear color due to the reverse trapping phenomenon, printing technology and coating are used. Provide integrated technology. That is, forming a resin coating film on the surface of a blanket having ink repellency, forming an image on a printing plate, and transferring the image onto a substrate is repeated by the number of resin layers.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is a method for producing a color filter in which a plurality of colored or transparent resin layers are laminated on a substrate and drying of each layer is eliminated.

[0006] For this purpose, the present invention is based on multicolor printing technology.

In the above multicolor printing technique, a transparent or colored resin is applied to the surface of a transfer body having an ink repellent surface, and the resin on the applied surface is applied to a plate having irregularities. An image is selectively formed and transferred onto a substrate.

The substrate according to the present invention is characterized in that it is a sheet.

Further, the substrate is a sheet having a surface subjected to a water-repellent treatment.

The sheet serving as a substrate may be coated with a transparent resin on a surface having water repellency.

[0011]

[Embodiment 1] FIG. 1 shows a third embodiment of the present invention.
The fixed frame 1 includes a coating cylinder 3 on which a silicon sheet 2 is attached, and a coating apparatus 4 for applying ink while being in contact with the surface of the cylinder.
4 units of blue and black (light shielding film) (symbol A: light shielding film unit, B: red unit, C: green unit, D: blue unit) and substrate sheet 5
Is provided with a printing platen 6 for setting the position.

A movable frame 7 is provided on the fixed frame 1. The movable frame 7 has a blanket cylinder 9 around which a silicon blanket 8 is wound, and a plate cylinder 11 on the surface of which a relief plate 10 which rotates in contact with the cylinder is mounted. One unit is provided corresponding to the coating cylinder 3 of the fixed frame 1.

FIG. 2 shows the above-described operation and principle. The coating device 4 applies a colored resin (ink) 22 onto the silicon sheet 2 on the coating cylinder 3, and applies the resin to the silicon blanket on the blanket cylinder 9. 8 (2-
1). Next, the resin plate is exposed and developed on the plate cylinder 11, and the relief plate 10 having a convex portion formed in a predetermined shape is attached thereto, and the relief plate is pressed to remove the resin 22 of the convex portion from the application surface on the blanket 8 (2). -2).

The remaining resin 22 on the blanket 8 is transferred onto the substrate sheet 5 on the printing platen by moving the movable frame (2-3). According to this principle, the light-shielding film, red, green, and blue and the movable frame make one reciprocation, so that any material such as PET, PEEK, PES, and polycarbonate can be used as a sheet.
A color filter could be manufactured with each thickness of.

[0015]

Example 2 (Production of a color filter by transfer) A silicone resin is applied to the surface of a pet sheet and dried to form a release sheet. This was used as a color filter substrate to form a light-shielding film, red, green, and blue by the method of Example 1, and set and dried to obtain a transfer color filter. An adhesive may be applied as needed. At the time of use, the color filter is faced on a glass substrate, and the PET sheet is peeled off after thermocompression bonding to produce a color filter.

[0016]

Embodiment 3 (Production of Color Filter with Overcoat by Transfer) FIG. 3 shows an embodiment of claim 6, in which a silicone resin 13 is applied to the surface of the pet sheet 12 and dried to form a release sheet (3-1). . The transparent resin 14 for overcoat diluted with a solvent having silicon affinity is applied on a release sheet and set and dried (3-2).

A light-shielding film, red, green, and blue are formed as a color filter substrate by the method of the first embodiment and set and dried to obtain a transfer color filter 15 (3-3). Then, the adhesive 16 is applied (3-4).
At the time of use, the color filter is faced on the glass substrate 21 and pressed (3-5) with the pressure roll 20 and then the pet sheet 12 is peeled off (3-6) to produce a color filter overcoated with a transparent resin. did.

The materials and conditions shown in the following table were used in the above-mentioned embodiment.

[Table 1]

FIG. 4 shows an example of a roll type printing machine for simultaneously producing four colors. In the figure, reference numeral 2 denotes a silicon sheet, 3 denotes an application cylinder, 4 denotes an application device, 5 denotes a substrate sheet, and 6 'denotes a printing impression cylinder. 8 is a silicon blanket, 9 is a blanket cylinder,
Reference numeral 10 denotes a relief plate, 11 denotes a plate cylinder, 17 denotes a dryer, 18 denotes a loader, 19 denotes an unloader, A denotes a light shielding film unit, B denotes a red unit, C denotes a green unit, and D denotes a blue unit.

FIG. 5 shows an example of a five-color printer capable of simultaneously forming a color filter with an overcoat, wherein 1 is a fixed frame, 2 is a silicon sheet,
Is an application cylinder, 4 is an application device, 5 is a substrate sheet, 6 is a printing platen, 7 is a movable frame, 8 is a silicon blanket, 9
Is a blanket cylinder, 10 is a letterpress, 11 is a plate cylinder, A is a light shielding film unit, B is a red unit, C is a green unit, D is a blue unit, and E is an overcoat unit.

[0021]

Since four colors are used at the same time, registration for each sheet and each color is unnecessary. Therefore, the filter can be manufactured only by the reciprocating time of the movable frame, the rotation time of each cylinder for applying, transferring, and forming an image of the resin, and the handling time of the substrate sheet performed during this time, and the tact time is 10 seconds / high sheet productivity. Can be achieved. Depending on the design of the machine, an ultra-high tact of 1 to 2 seconds / sheet can be achieved (see FIG. 4).

Since the cylinder for transferring the ink onto the substrate is made of a silicon blanket, the ink is easily removed, and the thickness and material of the substrate sheet are not limited. Further, since strong chucking of the sheet is not required, the mechanical design is relatively easy whether the sheet is a roll or a single sheet.

Since the principle that the undried resin is laminated without 100% reverse trapping is used, it is possible to put the upper resin even if the lower resin is undried. Therefore, it is possible to simultaneously form a color filter with an overcoat by making a machine that assumes five colors (see FIG. 5).

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a first embodiment.

FIG. 2 is an explanatory diagram illustrating an operation and a principle of the first embodiment.

FIG. 3 is an explanatory diagram of a third embodiment.

FIG. 4 is a schematic view of a roll sheet type four-color printing machine.

FIG. 5 is a schematic diagram of a single-sheet type five-color printing press.

[Explanation of symbols]

1 fixed frame 2 silicon sheet 3
Coating cylinder 4 Coating device 5 Substrate sheet 6
Printing platen 6 'Printing impression cylinder 7 Movable frame 8
Silicon blanket 9 Blanket cylinder 10 Letterpress 1
1 plate cylinder 12 PET sheet 13 Silicon resin 1
4 Transparent resin 15 Transfer color filter 16 Adhesive 1
7 dryer 18 loader 19 unloader 2
0 pressure roll 21 glass substrate 22 resin A light shielding film unit B red unit C green unit D blue unit E overcoat unit

Claims (6)

[Claims] 1. A method for producing a color filter in which a plurality of colored or transparent resin layers are laminated on a substrate, and drying of each layer is eliminated. 2. The method for producing a color filter according to claim 1, wherein the method is performed by a multicolor printing technique. 3. In a multicolor printing technique, a resin which is transparent or colored in a predetermined color is applied to the surface of a transfer body having ink repellency on the surface, and the resin on the applied surface is applied with a plate having irregularities. 3. The method for producing a color filter according to claim 2, wherein an image is selectively formed, and the image is transferred onto a substrate. 4. The method according to claim 3, wherein the substrate is a sheet. 5. The method for producing a color filter according to claim 3, wherein the substrate is a sheet whose surface is subjected to a water-repellent treatment. 6. The method for producing a color filter according to claim 4, wherein a sheet having a water-repellent surface coated with a transparent resin is used as a substrate.