JP3060750B2 - Method for manufacturing color filter, counter substrate for liquid crystal display device using the color filter, and liquid crystal display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a color filter, a counter substrate for a liquid crystal display device using the color filter, and a liquid crystal display device.

[0002]

2. Description of the Related Art A schematic configuration of a conventional color filter and a liquid crystal display panel using the same is shown in FIG. 4 and will be described below.

A counter substrate 1 with a color filter is composed of a transparent substrate 2
A light-shielding pattern film 3 is formed on the substrate a by a printing method or a photolithography method (FIG. 4A), and then a plurality of color filters 4 made of, for example, an organic film are formed (FIG. 4B) and further transparent. The conductive film 5 is formed. The light shielding pattern film 3
It is provided for the purpose of preventing color mixing between a plurality of color filters.

On the other hand, in the liquid crystal display device, an array substrate 7 in which a thin film transistor (TFT) 6 is formed on a transparent substrate 2b, and an alignment film 8 on the mutually opposing surfaces of the opposing substrate 1 are provided. The opposing substrate 1 and the array substrate 7 are bonded together by providing a sealing material 9 around the pixel area of the substrate. Then, the liquid crystal 10 is injected between the bonded substrates to fill the pixel region with the liquid crystal. Thereafter, the liquid crystal injection port is sealed to complete the liquid crystal panel. The polarizing plate 11 is attached to the front and back surfaces of the liquid crystal panel according to the application (FIG. 4).
(C)).

[0005]

The color filter is generally formed by a lamination process using a photolithography method in accordance with high definition of a liquid crystal display device. Therefore, expensive production equipment is required.

[0006] The coloring layer of the color filter thus formed is a thin film. Therefore, even if a light-shielding pattern film is provided for the purpose of preventing color mixing between a plurality of color filters,
Light incident from the filter forming surface side is mixed when passing through the transparent substrate layer of the opposite substrate.

[0007]

In order to solve the above-mentioned problems, the present invention provides a method in which a colored glass is disposed on a core portion and a colored glass is provided on a clad portion.
Bundled multiple rod-shaped glass materials configured to separate colored glass
Neat and glue, perform filling process between the glass materials, then
The glass material is cut in a direction perpendicular to the axial direction , or the filling process and the cutting are interchanged to obtain a color filter, and further, the colored portion of the cut surface is arranged in a mosaic shape. The surface is polished to obtain a color filter (optical filter).

[0008]

The method of the present invention is a method of obtaining a color filter without using a photolithography method , and a color glass rod having a clad portion is bound and bonded, and the color glass rod is provided between the color glass rods.
After the filling process is performed, the colored glass rod is cut in the direction perpendicular to the axial direction , or the filling process and the cutting are interchanged.
Get Ete. By setting the transmittance of the color glass at the cut thickness to be a desired transmittance as a color filter, the color glass becomes a color filter, and each color filter layer is formed on the clad portion.
Therefore, a separated structure is obtained.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Before describing embodiments of the present invention,
An example of a prior development developed prior to the present invention will be described.
You.

(Prior Development Example) A prior development example will be described with reference to (FIG. 1) and (FIG. 2) .

A rod-shaped colored glass 12 having a desired transmittance
R (red), 12G (green), 12B (blue) and glass 1 for shading
3 are bundled in a desired arrangement, and the respective glass materials are adhered by heating / compression bonding / stretching or the like so that the rod size of the colored glass layer becomes a desired value. Next, it is cut in a direction perpendicular to the bonding surface by, for example, a hydraulic cutter ((FIG. 1) dotted line portion).

Thereafter, the cut surface is polished to obtain a mosaic color filter of the present invention (FIG. 2A). A cross-sectional configuration of a liquid crystal panel completed by using a counter substrate having a transparent conductive film formed on the mosaic color filter surface thus obtained is shown in FIG. 2 (b). The opposing substrate 1 itself is made of filter glass 12 of each color, and a light-shielding glass 13 is arranged between the color filters, so that light 14 incident from the array substrate 7 side is shielded from light in the opposing substrate layer. Is reflected by the glass, and passes through without adjacent colors being mixed.

(Embodiment) Next, an embodiment of the present invention having a different form from the above-mentioned prior development example.
An example will be described with reference to FIG.

Colored glass 12R (red), 12G having a desired transmittance at a portion corresponding to the core of the optical fiber.
(Green) 12B (blue) and optical fiber cladding
Glass rods each having a portion corresponding to the layer 15 formed in advance are bundled in a desired arrangement, and each glass material is adhered by heating / compression bonding / stretching or the like so that the rod diameter of the glass rod becomes a desired value (FIG. 3 (a)). Further , a filling treatment is performed to strengthen adhesion and fill gaps between the glass rods.
Next, in the same manner as described above, the cut surface is cut in a direction perpendicular to the bonding surface by a hydraulic cutter or the like, and the cut surface is polished to obtain a mosaic color filter of the present invention (FIG. 3B). The filling process may be performed as a coating material on the cut surface after cutting.

In the counter substrate having a transparent conductive film formed on the filter surface obtained in this way, the substrate layer is a color filter layer, and each color filter is provided via a cladding layer 15 having a different refractive index. Adjacent, each color filter is separated. Light 14 incident from the array substrate side is reflected by the cladding layer 15 and passes without mixing adjacent colors (see FIG. 2 (b) of the preceding development example ).

[0016]

As described above, since the present invention is not a photolithography method, a color filter can be obtained without requiring expensive manufacturing equipment. In addition, a cladding layer is provided between each color filter.
Since the addition filling process material is arranged on, whereas the light incident Ri side by <br/> be color adjacent to each other on the other side mix it passes without. Therefore, there is no mixing of each color .
A clear display image can be obtained. Also just contact
In the case of wearing, there is a gap between the glass materials,
Liquid crystal material may leak when used for counter substrate
In addition, if there are uneven gaps, distortion may occur due to external pressure or heat.
This causes a shift in the relative position of the liquid crystal display element to the pixel electrode.
There is also a risk of causing display characteristics defects due to
However, in the present invention, by performing the filling process
Without such a problem , applications can be expanded to a counter substrate for a liquid crystal display device and a liquid crystal display device using the counter substrate, and the industrial applicability is great.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state before a cutting process in which block-shaped color filters are bundled into a block shape to explain a development example developed prior to the present invention.

FIG. 2 (a) is a perspective view of a color filter obtained by bundling and cutting rod-shaped color filters to explain the preceding development example, and FIG. 2 (b) is a liquid crystal panel using the filter as a counter substrate. Cross-sectional schematic diagram of

FIG. 3A is a perspective view showing a state before cutting into a block shape by bundling optical fiber rod-shaped color filters to explain an embodiment of the present invention , and FIG. Perspective view showing the obtained color filter

FIGS. 4A and 4B are process charts of forming a color filter by a conventional photolithography method, and FIG. 4C is a schematic cross-sectional configuration diagram of a liquid crystal panel using the filter as a counter substrate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Counter substrate 3 Light-shielding pattern film 4 Color filter 7 Array substrate 12 Color glass 13 Light-shielding glass 14 Light 15 Cladding layer

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G02B 5/20 101 G02F 1/1335 505

Claims (5)

(57) [Claims] 1. A colored glass is arranged on a core portion, and a colored glass is provided on a clad portion.
Bundled multiple rod-shaped glass materials configured to separate colored glass
Neat and glue, perform filling process between the glass materials, then
A method of manufacturing a color filter, comprising cutting the glass material in a direction perpendicular to an axial direction thereof . 2. A color glass is disposed on a core portion, and a plurality of rod-shaped glass materials having a structure for separating the color glass at a clad portion are bundled and bonded, and then the glass material is placed in a direction perpendicular to its axial direction . And then filling between the glass materials
A method of manufacturing a color filter. 3. The method for producing a color filter according to claim 1, wherein the colored portions on the cut surface have a plurality of colors and are arranged in a mosaic shape. 4. A counter substrate for a liquid crystal display device comprising a color filter manufactured by the manufacturing method according to claim 1. 5. A liquid crystal display device using the counter substrate for a liquid crystal display device according to claim 4.