JPS60225802A - Production of color filter for liquid crystal - Google Patents

Abstract

PURPOSE:To perform fine printing without superposition of inks at one time by providing a mask having plural apertures between a blanket for offsetting and transparent glass, making the apertures to coincide with the sticking positions of the inks and controlling the rotating position of the inks with respect to the transparent glass. CONSTITUTION:The mask 19 having the plural apertures 21 is disposed between the blanket 12 and transparent glass 18 of a device which consists of plural relief plates (a plate cylinder 05 for green, a plate cylinder 11 for red, a plate cylinder 17 for blue) for transferring plural inks, for example, green, red blue inks (respectively 22, 23, 24) and the blanket 12 for offsetting in contact with the plates 05, 11, 17 and transfers the plural inks 22, 23, 24 to the transparent glass 18 by the rotation of the blanket 12. The apertures 19 are made to coincide with the positions of the blanket 12 where the inks 22, 23, 24 are to be stuck and the inks 22, 23, 24 are transferred to the glass 18 by controlling the transfer positions thereof. Fine printing is thus executed at one time without superposition of the inks 22, 23 24 and the inexpensive color filter for a liquid crystal is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing a color filter for liquid crystal.

In recent years, with the adoption of color filters in liquid crystal displays,
The colorization of liquid crystal displays is progressing, and they are being applied to televisions and the like. Conventional color filters are generally manufactured by printing the color tones constituting the filter, such as red, green, and blue, onto a transparent glass. In the case of liquid crystal televisions, etc., as the number of image collections increases, the interval between printed tones becomes narrower and the size of the image collection becomes smaller, resulting in quality problems such as overlapping color tones during printing. Another method of manufacturing is to deposit a pigment by photolithography and vacuum deposition to provide the desired color tone at the required locations.

In addition, as another 14 structure, a transparent electrode is formed on a transparent glass, a voltage is applied on this transparent electrode, and the transparent glass is submerged in a liquid in which a pigment is dispersed. We manufacture color filters for liquid crystals using an electrolayer coating method that attaches pigments. Manufacturing by printing has the disadvantage that the printed color is distorted, and the vacuum evaporation method uses photolithography to produce n1 color tones.
Generally, photolithography and vapor deposition are repeated eight times.
This method has the drawbacks of being inefficient and requiring high equipment costs. In the electrodeposition coating method, after depositing a transparent conductive film, the transparent conductive film is butter-coated by photolithography.
It has a drawback that the color tone, that is, the electric display and fixation are repeated eight times.

In the manufacturing device for a liquid crystal color filter according to the present invention,
Multiple tones can be printed simultaneously in a single process, and the tones do not overlap during printing, making it possible to achieve fine printing.

The manufacturing apparatus of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a cross-sectional view showing the manufacturing apparatus for liquid crystal color filters of the present invention, FIG. 2 is a plan view of the eight-color printing blanket 12 of the manufacturing apparatus of the present invention, and FIG. 8 is a mask of the manufacturing apparatus of the present invention. 19, FIG. 4 is a schematic diagram showing the plane of the transparent glass 18 printed by the manufacturing apparatus of the present invention.

This manufacturing equipment includes green ink rollers 01 to 04, red ink rollers 07 to 10, and blue ink rollers 1 to 1.
3 to 16, a green plate cylinder 05, a red plate cylinder 11, a blue plate cylinder 17.8 color printing blanket 12 constitutes an offset printing section f, and a transparent glass 18f is placed on a transparent support table. The printing blanket E2 is fixed, and the green ink 22, red ink n1, and blue ink 24 of the eight-color printing blanket E2 are transferred and printed onto the transparent glass 18 through the openings 21 of the mask 19.

Next, a method for manufacturing a liquid crystal color filter using this manufacturing apparatus will be described in detail.

Make the green ink thin and uniform with green ink Nelilo-20, 1 to 04, so that the green ink adheres to the green plate cylinder o5.
Ru. The green ink adhering to the green plate cylinder 05 is transferred to the eight-color printing blanket 12, and the green ink η shown in FIG.
is set. The red ink and the blue ink are also transferred to the eight-color printing blanket 12 via an ink refill roller and a plate cylinder, and set in the same way as the red ink n1 and blue ink in FIG. 2. Planchera for 8-color printing) 1
The opening 21 of the mask 19 is aligned with the printing position 2, the transparent glass 18 is set on the transparent glass support table m, and the eight-color printing blanket 12 is rotated as the transparent glass support table 20 moves. Green ink 22, red ink 23% on 8-color printing blanket 12 'ft
A row of colored inks is applied to a green filter 5 and a red filter 2 on a transparent glass 18 through an opening 21 of a mask 19.
6. The blue filter 27 is printed. Next, the printed transparent glass 18' k 710 is heated to solidify the ink on the transparent glass 18, and a transparent conductive film such as tin oxide or di/dium oxide is applied onto the printed filter by sputtering or the like. At least form a conductive layer.
In this case, a color filter for LCDs will be completed. In the case of a matrix color filter, a mask is formed by photolithography during sputtering, and only the color filter portion is coated with tin oxide or di/dium oxide.
By applying it, it is possible to complete a color filter for liquid crystals.

Since the present invention is manufactured as described above, fine printing is possible.
This is possible without the weight of printing ink, and it is possible to supply color filters for LCDs.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a manufacturing apparatus for liquid crystal color filters according to the present invention, Fig. 2 is a plan view of an 8-color printing blanker (12) of the manufacturing apparatus according to the present invention, and Fig. 8 is a cross-sectional view showing a manufacturing apparatus for liquid crystal color filters according to the present invention. FIG. 4 is a plan view of the mask 19 of the apparatus, and FIG. 4 is a schematic diagram showing a plan view of a color filter for liquid crystal manufactured using the manufacturing apparatus according to the present invention. 01.02, 08, 04: Green ink rollers 07, 08, 09, 10: Red ink rollers 13, 14, 15, 16: Blue ink rollers 05: Green plate cylinder 11: Red plate cylinder 17: Blue plate cylinder [2: 8-color printing blanket 18: Transparent glass 19: Mask 20: Transparent glass support table 20': Transparent glass support table (during printing 701 = Transparent glass support table (after printing) 22: Green ink ?3: Red ink 24: Blue ink 25 = Green filter 26: Red filter 27: Blue filter and above Applicant: Seiko Electronics Company Agent Patent Attorney Mogami Figure 1

Claims (1)

[Claims] In an apparatus comprising a plurality of letterpress plates for transferring a plurality of inks and an offset bracket/bracket that contacts the letterpress plates, the plurality of inks are transferred to transparent glass by rotation of the blanket. A liquid crystal color comprising a structure in which the transfer position of the ink to the transparent glass is regulated by providing a mask having a plurality of openings between the glass and aligning the openings with the ink adhesion position of the blanket. Filter manufacturing equipment.