JPS6247624A - Multicolor filter for liquid crystal panel display and its manufacture - Google Patents

Abstract

PURPOSE:To eliminate a color blurring by forming a color pattern layer by using a transfer sheet and smoothing surfaces of color pattern layers of >=2 colors. CONSTITUTION:The color pattern of a multicolor filter to be manufactured is formed on the transfer sheet by a normal printing method. The transfer sheet is obtained by forming a transfer layer of one-layer constitution of specific color pattern layers of >=2 colors on a substrate sheet such as a plastic film with peeling property. A dot pattern or stripe pattern is easily formed as the color pattern layer 2 of the color filter and the color filter substrate 1 is manufactured by an ordinary formation simultaneous feeding method by using this transfer sheet. Thus, the color filter 3 is obtained. Then, a figure shows a simulated example of the use of the multicolor filter 3 for a liquid crystal panel display.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a multicolor color filter for liquid crystal panel displays and a method for manufacturing the same. The present invention relates to a multicolor filter and a method for manufacturing the same.

<Prior art and its problems> In recent years, liquid crystal panel displays have been widely used for display purposes in desktop electronic computers, electronic clocks, measurement and instrumentation equipment, household electronic equipment, audio equipment, etc. It is used for displaying peripheral terminals of various devices, as well as for displaying various instruments in automobiles and television receivers.
There is an increasing demand for multicolor liquid crystal panel displays.

In order to meet this demand, development of multicolor filters to enable multicolor display on liquid crystal panel displays is being promoted.

Examples of things that can usually be produced by printing include multicolor color filters made by directly printing color pattern layers of two or more colors on a transparent plastic molded product;
Alternatively, there is a multicolor color filter in which a color pattern layer of two or more colors is directly printed on the surface of an assembled liquid crystal panel display (see FIG. 3).

However, these directly printed multicolor filters have the following problems. In other words, since the printing ink containing TA+ organic solvent is used, the color pattern layer is printed on the surface and inside of the plastic molding, causing solvent cracks, which obstructs light transmission (similar to BL). For some reason, the plastic molded product warps, resulting in poor adhesion with the flat panel display, causing color misalignment; (d) Pattern layer of a molded transparent plastic molded product. Direct printing is difficult if the reflective surface of the molded product has irregularities. Contains.

<Purpose of the spectacle> The purpose of the present invention is to solve the various problems mentioned above.
A multicolor color product in which a transfer sheet having a predetermined color pattern layer of two or more colors is used to simultaneously form a plastic substrate for a multicolor color filter, and a predetermined color pattern layer of two or more colors is formed on the plastic substrate. It's trying to get a filter.

<Means for Solving the Problems> That is, the present invention provides a multicolor color filter for a liquid crystal panel display in which a color pattern layer of two or more colors is formed by printing on a transparent plastic molded product; This is a multicolor color filter for a liquid crystal panel display, characterized in that the surface of the color pattern layer is a smooth surface. Furthermore, the present invention provides a method for manufacturing a multicolor color filter for a liquid crystal panel display, in which a color pattern layer of two or more colors is formed on a transparent plastic molded product by printing; Forming a predetermined color pattern layer of two or more colors on the plastic molded product at the same time as forming the plastic molded product using a transfer sheet on which a transfer layer is formed with a predetermined color pattern layer as a one-bridge layer. A method for producing a multicolor filter for a liquid crystal panel display, characterized by:

Hereinafter, the present invention will be explained in more detail using the drawings.

It should be noted that the drawings are drawn in an exaggerated manner, ignoring the relative dimensional relationships of the constituent elements, for clarity of illustration.

FIG. 1 shows an embodiment of a multicolor color filter according to the present invention, and shows a color filter substrate 1 and color pattern layers 2a, 2b, 2c, and 2d of four colors. Here, in the color pattern layer 2, for example, 2a is red, 2b is green, 2c is blue, and 2d is black.

The surfaces of the color filter substrate 1 and the color pattern N2 are formed completely on the same plane.

Next, a method for manufacturing a multicolor filter according to the present invention will be explained.

In the present invention, first, a color pattern of a multicolor color filter to be produced is formed on a transfer sheet by a normal printing means.

The transfer sheet may have a structure in which a transfer layer having a predetermined color pattern layer of two or more colors is formed on a releasable base sheet, such as a plastic film.

The color pattern layer of the multicolor color filter can be designed as appropriate depending on its use, and can be easily formed in either a dot pattern or a stripe pattern.

Using this transfer sheet, a color filter substrate 1 is manufactured by a known molding and painting method.

In this molding-simultaneous painting method, first, the transfer sheet is placed at a predetermined location in a mold, the mold is closed, and then molten resin is injected into the mold. Thereafter, the molded color filter is taken out at the same time as or after the mold is opened.

By doing so, the multicolor filter 3 shown in FIG. 1 is obtained.

FIG. 2 schematically shows an example in which the multicolor filter 3 having the above structure is used in a liquid crystal panel display.

<Effects of the Invention> Since the present invention has the above configuration,
This has the following effects.

In other words, since the color pattern layer is formed using a transfer sheet, the transmission of light is prevented without causing a solvent crank on the surface or inside of the color filter substrate (plastic molded product) on which the color pattern layer is formed. You can get something good.

Furthermore, since the color filter substrate does not warp, it is possible to obtain good adhesion to a flat panel display. Furthermore, since the color pattern layer is formed at the same time as the color filter substrate is formed, the surface of the color filter layer becomes a uniform and smooth surface, which makes it easy to connect the color filter to the surface glass of flat panel displays such as liquid crystal panel displays. Since it is possible to use them completely in close contact with each other without leaving any space between them, color shift will not occur. Furthermore, it is possible to produce a multicolor color filter even when the reflective surface of the pattern forming surface is uneven.

According to the present invention, it is possible to freely obtain a molded shape that is simply a flat plate, a shape that has a three-dimensional part for light diffusion on the opposite side to the surface on which the color pattern layer is formed, or a three-dimensional shape that has a different cross section. Therefore, it is easy to obtain a multicolor filter provided with functions such as a light diffusing surface, a light guide path, and a light reflecting surface.

Therefore, the multicolor filter according to the present invention can be used very effectively in industry, mainly for peripheral terminal displays of various devices, in-vehicle displays, and television image displays.

[Brief explanation of the drawing]

FIG. 1 is a schematic enlarged cross-sectional view of a multicolor filter according to an embodiment of the present invention. FIG. 2 is a sectional view schematically showing an example in which the multicolor filter of the present invention is used in a liquid crystal panel display. FIG. 3 is a schematic enlarged sectional view of a conventional multicolor filter. In the figure, 1-----1 filter substrate 2--1 color pattern layer 3--1 multicolor color filter 4--1 transparent substrate 5--1 transparent electrode 6 ------1 Alignment film 7 --- Spacer 8 ---1 Liquid crystal 9 --- Polarizing plate

Claims (2)

[Claims] (1) In a multicolor color filter for a liquid crystal panel display in which a color pattern layer of two or more colors is formed by printing on a transparent plastic molding; The surface of the color pattern layer of two or more colors is a smooth surface. Features a multicolor filter for LCD panel displays. (2) In a method for manufacturing a multicolor color filter for a liquid crystal panel display, in which a color pattern layer of two or more colors is formed on a transparent plastic molded product by printing; A transfer sheet having a transfer layer having a color pattern layer as one constituent layer is used, and a predetermined color pattern layer of two or more colors is formed on the plastic molded product simultaneously with the molding of the plastic molded product. A method for producing multicolor filters for liquid crystal panel displays.