JP2001154204A - Color liquid crystal display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a color liquid crystal display panel ensuring an excellent color liquid crystal display and simultaneously improving latitude of design by efficiently shielding light in non-displaying regions and uniformizing the distances between the both transparent base materials by filling differences in level between color filter forming regions and non-forming regions. SOLUTION: The respective color filters 5 are formed only on displaying regions 4 of the transparent base materials 3 and black masks 6 are formed on the non-displaying regions 7 outside the displaying regions 4. Simultaneously outside diameters of a spacer 14 in the gap corresponding to the displaying regions 4 and of a spacer 15 in the gap corresponding to the non-displaying regions 7 are made different with each other corresponding to the difference of layer thickness between the black mask 6 on the non-displaying regions 7 and the color filter 5 on the displaying regions 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color liquid crystal display panel, and more particularly, to a color filter substrate having a plurality of color filters formed thereon and a counter substrate facing the color filter substrate with a predetermined gap therebetween via a sealing material. The present invention relates to a color liquid crystal display panel which is provided and bonded, and in which a spacer for maintaining a gap is dispersed in the gap and a liquid crystal is injected.

[0002]

2. Description of the Related Art Conventionally, a color liquid crystal display panel has used a color liquid crystal display panel having three color filters of red, green and blue. The color liquid crystal display panel has the color filters formed thereon. Color filter substrate.

[0003] The color filter substrate has a transparent substrate such as a glass substrate or a plastic substrate. A predetermined area at the center of the transparent base is a display area of the color liquid crystal display panel, and the outside of the display area is a non-display area. Further, a plurality of the color filters are formed on the transparent substrate at predetermined intervals. Further, a light-shielding black mask is formed on the transparent substrate and between the color filters.
Furthermore, a flattening film made of, for example, an acrylic resin or an epoxy resin is formed almost entirely on the transparent substrate, mainly for the purpose of flattening the color filter forming region. A transparent electrode is formed on the flattening film, and an alignment film is formed on the transparent electrode.

[0004] The color liquid crystal display panel has an opposing substrate at a position facing the color filter, wherein a transparent electrode and an alignment film are formed on a transparent substrate having the same structure as described above. ing.

[0005] The color filter substrate and the counter substrate are adhered to each other while maintaining a predetermined gap via a frame-shaped peripheral sealing material. Within the gap,
Spacers for maintaining the gap are dispersed.

In such a conventional color liquid crystal display panel, the gap between the transparent substrates becomes uneven due to the step between the area where the color filter is formed and the area where the color filter is not formed. To prevent this, a color filter is also formed on a non-display area of the transparent substrate. That is, originally, it is sufficient to form the color filter only in the display area where liquid crystal display is performed. However, since the color filter generally has a thickness of about 1.0 to 3.0 μm, a step corresponding to the thickness of the color filter is generated between a region where the color filter is formed and a region where the color filter is not formed. This step has caused the gap between the two transparent substrates to be non-uniform, thereby deteriorating the quality of the liquid crystal display. For this reason, conventionally, a color filter has been formed also on a non-display area where liquid crystal display is not performed.

Thus, the step formed between the color filter formation region and the color filter non-formation region is eliminated by almost eliminating the color filter non-formation region itself, and the spacing between the two transparent substrates is made uniform.

[0008]

However, in the conventional color liquid crystal display panel, a color filter is formed also in a non-display area, so that the color filter formed in the non-display area transmits light. Was. For this reason,
There has been a problem that the display quality of the color liquid crystal display panel is rather deteriorated.

Further, when a color filter is formed on the non-display area, the range in which the transparent electrode is formed on the non-display area is restricted, which causes a problem that the degree of freedom in design is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is intended to compensate for a step between a color filter forming area and a non-forming area while effectively shielding a non-display area from light. It is an object of the present invention to provide a color liquid crystal display panel capable of performing a favorable color liquid crystal display by making the uniformity, and also improving the degree of freedom of design.

[0011]

According to a first aspect of the present invention, there is provided a color liquid crystal display panel, wherein each of the color filters is formed only on a display area of a transparent base material. A black mask is formed on the non-display area outside the area, and a gap corresponding to the display area is formed by a size corresponding to a film thickness difference between the black mask on the non-display area and the color filter on the display area. Is different from the outer diameter of the spacer in the gap corresponding to the non-display area.

By adopting such a configuration, it is possible to suppress the transmission of light from the non-display area, and to compensate for the step between the color filter forming area and the non-forming area, thereby making the two transparent substrates The spacing between the materials can be made uniform, and the mode of forming the transparent electrode formed in the non-display area can be diversified.

A feature of the color liquid crystal display panel according to a second aspect is that, in the first aspect, the black mask on the non-display area is formed entirely without any opening on the non-display area. .

By employing such a configuration, transmission of light from the non-display area can be more effectively prevented.

According to a third aspect of the present invention, in the color liquid crystal display panel according to the first or second aspect, the black mask on the non-display area is also provided below the sealing material.

By employing such a configuration, transmission of light from the sealing material can be prevented, and light shielding in the non-display area can be surely performed.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a color liquid crystal display panel according to the present invention will be described below with reference to FIG.

As shown in FIG. 1, a color liquid crystal display panel 1 according to the present embodiment has a color filter substrate 2.

The color filter substrate 2 has a transparent substrate 3 such as a glass substrate or a plastic substrate. A predetermined area at the center of the transparent substrate 3 is a display area 4 of the color liquid crystal display panel 1.
Outside is a non-display area 7. The transparent substrate 3
, A plurality of color filters 5 of three colors of red, green and blue are formed at predetermined intervals.
A black mask 6 for shielding light is formed between the color filters 5. Further, on the non-display area 7 outside the display area 4, the black mask 6 is formed entirely without forming an opening and at a position where the seal material is formed. Here, the display area is an area where a transparent electrode 9 formed on the color filter substrate 2 and a transparent electrode 9 formed on a counter substrate 11 described later are opposed to each other, and a liquid crystal display is possible.

The transparent substrate 3 is made of, for example, an acrylic resin or an epoxy resin, mainly for the purpose of flattening the region where the color filter 5 is formed (the display region 4 in the present embodiment). The flattening film 8 is formed almost entirely. A transparent electrode 9 made of, for example, ITO (indium tin oxide) is formed on the flattening film 8, and an alignment film 10 is formed on the transparent electrode 9.

The color liquid crystal display panel 1 has a counter substrate 11 formed by forming a transparent electrode 9 and an alignment film 10 on a transparent substrate 3 at a position facing the color filter 5.
have.

The color filter substrate 2 and the counter substrate 11 face each other so that the alignment films 10 formed on the respective substrates are twisted by 240 ° in the liquid crystal molecules. Are bonded to each other while maintaining a predetermined gap.

In this gap, a spacer 1 for maintaining the gap is provided.
STN (Super Twisted Nematic) suitable for large-capacity liquid crystal display
Liquid crystal 16 is injected.

In this embodiment, the non-display area 7
The display area 4 has a size corresponding to the film thickness difference between the upper black mask 6 and the color filter 5 on the display area 4.
Is formed smaller than the outer diameter of the spacer 15 in the gap corresponding to the non-display area 7. That is, for example, the non-display area 7
When the thickness of the upper black mask 6 is 0.1 μm and the thickness of the color filter 5 on the display area 4 is 1.0 μm, the outer diameter of the spacer 14 in the gap corresponding to the display area 4 is Spacer 1 in gap corresponding to non-display area 7
5 may be formed about 0.9 μm smaller than the outer diameter.

The spacers 14 and 15 having different outer diameters are used.
Is, for example, the color filter substrate 2 and the counter substrate 11
Before the laminating step, it can be disposed by spraying in two stages. That is, in this case, first, a mother substrate (not shown) for forming the plurality of color filter substrates 2 is prepared, and the plurality of color filter substrates 2 are formed on the plurality of color filter substrate forming regions of the mother substrate. However, at this stage, each color filter substrate 2 is in an uncut state that has not been individually cut. Then, as a first step, in a state where a shielding plate such as a metal mask is disposed above the substrate located in each display area 4, the spacer 15 having a large outer diameter, that is, a particle diameter is dropped on the mother substrate by, for example, a natural fall. Spray using. Thereby, the spacers 15 are scattered on the non-display area 7. Next, as a second step, the spacers 14 having a small particle size are scattered on the mother substrate in a state where the shielding plate is removed from each display area 4. Thus, the spacers 14 are scattered on the display area 4. At this time, the spacers 14 having a small particle diameter are also scattered in the non-display area 7. However, since the spacers 15 having a large particle diameter are scattered in the non-display area 7, the gap 14 is affected. I will not give.

Next, the operation of the present embodiment will be described.

In this embodiment, the color filter 5 is not formed on the non-display area 7 as in the prior art, but a light-shielding black mask 6 is formed entirely without an opening. . Therefore, the light is not transmitted by the color filter 5 on the non-display area 7 as in the related art, and the black mask 6 does not transmit the light.
Can be effectively shielded from light. For this reason, the quality of the liquid crystal display is improved. Furthermore, since the wiring of the transparent electrode 9 on the non-display area 7 can be formed in various modes, the degree of freedom in design can be improved.

The black mask 6 on the non-display area 7
Is disposed below the sealing material 12, so that no light is transmitted from the sealing material 12, so that the non-display area 7 can be reliably shielded and the non-display area 7 can be reduced. Thus, the area effective for display can be enlarged.

Further, in the present embodiment, the display area 4 has a size corresponding to the thickness difference between the black mask 6 on the non-display area 7 and the color filter 5 on the display area 4.
Is formed smaller than the outer diameter of the spacer 15 corresponding to the non-display area 7.
For this reason, the step can be compensated for by the spacers 14 and 15 having different outer diameters without forming the color filter 5 for eliminating the step in the non-display area 7 as in the related art, and the gap between the two transparent substrates 3 is provided. Can be made uniform.

Therefore, according to the present embodiment, the step between the formation area (display area 4) of the color filter 5 and the non-formation area (non-display area 7) is compensated for while effectively shielding the non-display area 7 from light. The space between the two transparent substrates 3 can be made uniform. Further, since the color filter 5 is not formed in the non-display area 7, the degree of freedom in wiring the transparent electrode 9 to the non-display area 7 can be improved. Further, by forming the black mask 6 on the non-display area 7 entirely without providing an opening, the non-display area 7 can be more effectively shielded from light. Further, by using the liquid crystal 16 as the STN liquid crystal, a large-capacity liquid crystal display can be performed.

In the present embodiment, the film thickness of the black mask 6 in the non-display area 7 is set to the color filter 5 in the display area 4.
However, the thickness of the black mask 6 in the non-display area 7 may be thicker. In this case, the spacers on the black mask 6 in the display area 4 can be easily crushed by dispersing the soft spacers in the display area 4, and the distance between the transparent bases 3 can be made uniform.

The present invention is not limited to the above embodiment, but can be variously modified as needed.

[0033]

As described above, according to the color liquid crystal display panel of the first aspect of the present invention, the step between the color filter forming region and the non-forming region is compensated for while effectively shielding the non-display region from light. By making the distance between the two transparent substrates uniform, a liquid crystal display of good quality can be performed, and the degree of freedom in design can be improved.

According to the color liquid crystal display panel of the second aspect, since the non-display area can be more effectively shielded from light, the quality of the liquid crystal display can be further improved in addition to the effect of the color liquid crystal display panel of the first aspect. Can be done.

According to the color liquid crystal display panel according to the third aspect, in addition to the effect of the color liquid crystal display panel according to the first or second aspect, transmission of light from the sealing material can be prevented, and light shielding of a non-display area can be prevented. Can be assured. Further, the non-display area can be reduced, and the area effective for liquid crystal display can be expanded.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an embodiment of a color liquid crystal display panel according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Color liquid crystal display panel 2 Color filter substrate 3 Transparent base material 4 Display area 5 Color filter 6 Black mask 7 Non-display area 8 Flattening film 9 Transparent electrode 11 Opposite substrate 12 Seal material 14, 15 Spacer 16 Liquid crystal

Claims (3)

[Claims] 1. A plurality of color filters are formed at predetermined intervals on a transparent base material having a display area and a non-display area, and a black mask for shielding light between the color filters is formed. A flattening film is formed on a transparent substrate on which a black mask and a color filter are formed, and a color filter substrate formed by forming at least a transparent electrode film on the flattening film is provided. At a position, a counter substrate formed by forming at least a transparent electrode on a transparent substrate is provided, and the color filter substrate and the counter substrate are bonded to each other with a predetermined gap therebetween through a frame-shaped sealing material, In a color liquid crystal display panel in which spacers for maintaining a gap are dispersed and liquid crystal is injected, the color filters are arranged in front of a transparent base material. And a black mask is formed on the non-display area outside the display area, and a difference in film thickness between the black mask on the non-display area and the color filter on the display area is formed. A color liquid crystal display panel wherein an outer diameter of a spacer in a gap corresponding to the display area is different from an outer diameter of a spacer in a gap corresponding to the non-display area by an appropriate size. 2. The color liquid crystal display panel according to claim 1, wherein the black mask on the non-display area is entirely formed so as not to have an opening on the non-display area. 3. The color liquid crystal display panel according to claim 1, wherein a black mask on the non-display area is also provided below the sealing material.