JPH0462503A - Color filter - Google Patents

Abstract

PURPOSE:To easily laminate a transparent electrode on the filter and to prevent a picture element which is weak in sticking force from peeling by arranging picture elements of three colors specifically. CONSTITUTION:A black matrix 4 is formed on a substrate 2 first and then the picture elements R(red), G(green), and B(blue) are formed. Those picture elements are formed by, for example, printing on the glass substrate 2 for dispersing pigment. The transparent electrode for liquid crystal driving is laminated on the picture elements R, G, and B. The picture element are arranged in pattern (R, R, G, B, B, and G), which is repeated. The successive picture elements R and R, and B and B are coupled integrally and the recessed parts between R and R, and B and B are removed. Thus, recessed parts are decreased and then the smoothness of the filter increases to facilitate the lamination of the transparent electrode, thereby reducing trouble such as the breaking of a wire. Then the sticking force to the substrate varies depending upon the pigment used for the picture elements and picture elements R and B which are low in sticking strength are coupled by two and integrated to improve the sticking strength of the picture elements.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a color filter used in liquid crystal color displays and the like.

[Prior art] Color filters used in liquid crystal displays, etc.
Pixels of at least three colors such as green, blue, yellow, cyan, and maienda are regularly arranged to form a filter.

Pixels are formed on a substrate by dyeing, printing, or dispersing pigment. A transparent electrode for liquid crystal is laminated on top of the pixel. Various pixel arrangement patterns are known, but all of them simply repeat the same pattern of red, green, blue, etc.
07,022, JP-A No. 60-207,118, and JP-A No. 61-56,304).

These known techniques do not take into account the difficulty of laminating transparent electrodes on pixels. In reality, a recess is formed between the pixels, and this recess prevents the stacking of transparent electrodes. That is, the recesses between pixels cause a decrease in the adhesion strength of the transparent electrode, and also cause disconnection of the transparent electrode.

[Problem of invention] The problems of this invention are the following three points.

(1) Reduce unevenness on the surface of the color filter to facilitate lamination of transparent electrodes. (2) Increase the area of pixels with low adhesion to the substrate to increase pixel adhesion.

(3) Minimize the decrease in resolution of color filters.

[Structure of the Invention] The color filter of the present invention is a color filter in which pixels of at least three colors, ie, a first color pixel, a second color pixel, and a third color pixel, are regularly arranged. pixel,
Second color pixel, third color pixel.

The pixels are arranged by repeating the pattern of the third color pixel and the second color pixel, and between the adjacently arranged first color pixel and the second color pixel, and between the adjacently arranged third color pixel and the third color pixel. It is characterized by connecting the two parts to form a single body.

For example, the first color pixel is red (R), the second color pixel is green (G),
The present invention will be explained assuming that the third color pixel is blue (B). The pixel arrangement in this invention is (R,R.

G, B, B, G) and repeat this pattern.

Continuous R and H pixels and B and B pixels were connected and integrated, and the recesses between R and R and between B and 8 were removed (R, R, G
, B, B, G). The corresponding pattern in the conventional example is (R, G, B).

(R, G, B), and there are six recesses here.

On the other hand, the recesses in this invention are between R and G, between G and 8, and B.

With 4 pieces between G, G and R, the number of recesses is reduced to 2/3. When the number of concave portions is reduced, the smoothness of the filter increases, the lamination of transparent electrodes becomes easier, and troubles such as wire breakage are reduced.

Next, the adhesion force to the substrate varies depending on the pigment used for the pixel.
The adhesion force of each pixel is not uniform. Pixels with low adhesive force are defined as first color pixels and third color pixels in this invention, pixels with high adhesive force are defined as second color pixels, and a large area is allocated to pixels with low adhesive force. As a result, a large area is allocated to weak pixels, thereby preventing pixel peeling.

Third, consider the resolution of the color filter of this invention. Repeating the pattern (R, R, G, B, B, G) is actually equivalent to repeating the pattern (R, G, B), (B, G, R). This is (R,R.

Repeat two patterns of G, B, B, G), (
R], [R, G, Bl, [B, G, R], [R, G, B
l, [B.

G) can be understood. [B] at the end of the pattern.

The part G) is combined with the first pixel R of the next pattern, resulting in the arrangement [B, G, R]. [R,G.

Bl or [B, G, R] arrangement is full color 1
Corresponding to pixels, one pixel in full color appears for every third pixel in the R, G, B system.

Here, we use the red, green, and blue color system as an example.
A color system such as yellow, cyan, magenta, or a four-color color system may be used. For example, in a four-primary color system of A, B, C, and D, when pixel A and pixel R are used repeatedly, (A, B, C.

D) and (D, C, B, A) are repeated alternately, and (A.

A, B, C, D, D, C, B) pattern may be used.

[Example] Examples are shown in FIGS. 1 to 4. Fig. 1 shows a cross section of the color filter in the row direction, and Fig. hIg2 shows a plane excluding the black matrix. In the figure, 2 is a transparent substrate such as glass, and 4 is a black matrix provided between pixels. R is a red pixel, G is a green pixel, and B is a blue pixel, and these may be changed to yellow, 7-en, magenta, etc. First, a black matrix 4 is formed on the substrate 2,
Next, pixels R, G, and B are formed. Pixels R, G, B are
For example, it is formed by printing on the glass substrate 2 or by dispersing pigment. Of course, the pixels R, G, and B may be formed by a dyeing method or the like. Transparent electrodes for driving liquid crystal are laminated above the pixels R, G, and B. In the example, it is assumed that the adhesion force to the substrate 2 is low in the pixel R and the pixel B.

The pixel arrangement is (R, R, G, B, B, G) repeated, and the recesses between pixels in the [R, R3 part and [B, Bl part] are removed, and the [R, R3 part or [B and Bl parts are connected and integrated. This arrangement is (R,G,B) and (B,G,
equal to the alternating pattern of (R)
, G, B) or (B, G, R) corresponds to one pixel in full color.

2nd rI! J shows the planar arrangement of the color filters.

Here, repetition of the [R, R] and [B, Bl patterns in the column direction is avoided, thereby reducing the regularity of pixel arrangement. [
A pattern [B, B] is arranged in the lower row position of the R, R3 portion, and pixels are arranged in a staggered manner.

As a result, the simple regularity of pixel arrangement is reduced, and resolution can be improved somewhat. Of course, as shown in Figure 3, patterns such as [R, R] are arranged in the column direction,
A striped arrangement may also be used. In this case, the same pixels are repeated in the column direction, and the resolution is somewhat degraded.

As is clear from FIG.
, B] There are no recesses in the portions, and the smoothness of the color filter is improved. When the smoothness improves, it becomes easier to stack the transparent electrode on the filter, and it is possible to prevent disconnection of the transparent electrode and decrease in film strength.

Pixel R and pixel B, which have low adhesion strength, connect two pixels to form a single unit to improve the adhesion strength of the pixel.

FIG. 4 shows the manufacturing process of the embodiment, and FIG. 5 shows the manufacturing process of a conventional color filter. First, for example, an ultraviolet curing resin in which a red pigment is dispersed is applied to the substrate 2, and unnecessary parts are removed by exposing it to light using an appropriate mask to form a pixel R (fourth
Figure 1), Figure 5 1)). Next, a resin 5 in which, for example, a blue pigment is dispersed is applied and exposed using a mask 6.7 (FIG. 4 2), FIG. 5 2)).

Thereafter, the unexposed portion is removed to form a blue pixel B (FIG. 4 3), FIG. 5 3)). After these, pixels G in which green pigment is dispersed are formed.

[Effect of the invention] This invention provides the following effects.

(1) Of the pixels of at least three colors, two pixels of two colors are provided integrally. Integral I: There is no concave part in the two pixels, and the flatness of the color filter is improved. As a result, it becomes easy to stack the transparent electrode on the filter.

(2) The adhesion force to the substrate differs depending on the type of pixel.

A combination of two pixels is assigned to a pixel with low adhesion to prevent pixel peeling and the like.

(3) The pixel arrangement pattern is (first pixel, second pixel,
The two patterns of (third pixel) and (third pixel, second pixel, first pixel) are alternately repeated. As a result, three pixels correspond to one full-color pixel, and a decrease in resolution can be kept to a small level.

[Brief Description of the Drawings] Figure 2 is a sectional view in the row direction of the color filter of the example.
The figure is a plan view thereof. FIG. 3 is a plan view of a modified color filter, and FIGS. 4 1) to 3) are sectional views showing the manufacturing process of the color filter in the example. Figure 5 1)-3)
These are cross-sectional views showing the manufacturing process of a conventional color filter. In the figure, 2 substrates, 4 black matrix, R,
G, B pixels.

Claims (1)

[Claims] (1) In a color filter in which pixels of at least three colors, ie, a first color pixel, a second color pixel, and a third color pixel, are arranged regularly, the first color pixel, the first color pixel, the second color pixel, and the The pixels are arranged by repeating the pattern of three color pixels, third color pixels, and second color pixels, and between adjacent first color pixels and adjacent third color pixels. A color filter characterized by connecting and integrating third color pixels.