JP2001066588A - Liquid crystal display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent distortion of a glass substrate causing generation of color unevenness (luminance unevenness) without sacrificing lightness at the time of lightening in an inner surface black mask type liquid crystal display panel. SOLUTION: A liquid crystal display panel provided with a pair of glass substrates 1a and 1b having transparent electrodes and a black mask B for shielding light passing through a part except a display part on a side of an inner surface of the one glass substrate 1a comprises a specified display part Sa wherein at least either of the width or length of the display part is specified to be >=400 μm and a supporting wall 10 having a width Wb disposed in a grid shape on the specified display part Sa with a pitch Wp six times the width Wb or more and fifteen times the width Wb or less.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display panel, and more particularly, to a liquid crystal display panel having a black mask on its inner surface for shielding a portion other than a display portion from light.

[0002]

2. Description of the Related Art A liquid crystal display panel is roughly classified into a segment display type and a dot matrix display type. In any case, a non-display portion which is not involved in the display leaks light. A black mask (light shielding film) for prevention is provided.

FIG. 5 shows an example of a display screen of a segment display type liquid crystal display panel, in which a white portion is a segment display portion, and a solid black portion is a non-display portion (light-shielded portion) using a black mask. FIGS. 6 and 7 are longitudinal sectional views of the first conventional example and the second conventional example, respectively, taken along the line AA of FIG. 5. First, the internal structure of each conventional example will be schematically described. .

[0004] Each of the conventional examples includes a pair of transparent glass substrates 1a and 1b.
A black mask B is provided on the non-display portion except for the segment display portion S on the inner surface side of a, and although not shown, a transparent electrode is formed on the inner surface side of the other glass substrate 1b.

In the first conventional example shown in FIG. 6, a surface smoothing layer 2 having a predetermined thickness is provided on a black mask B, and a transparent electrode (not shown) is formed thereon. On the other hand, in the second conventional example of FIG. 7, a transparent electrode (not shown) is directly formed on the glass substrate 1a having the black mask B without providing the surface smoothing layer 2. .

In each of the conventional examples, for example, an in-plane spacer 3 is scattered on one glass substrate 1a and a peripheral sealing material (not shown) is applied around the other glass substrate 1b. The glass substrates 1a and 1b are pressure-bonded via a peripheral sealing material, and a predetermined liquid crystal substance is injected into the cell gap.

[0007]

The in-plane spacer 3 is formed of a bead sphere having an average diameter of, for example, about 6 μm, and is used for the purpose of keeping the cell gap width uniform. The mold had the following problems.

That is, the thickness of the black mask B is usually 1 to 2 μm, but a step is formed between a portion where the black mask B is provided and a portion where the black mask B is not provided. In addition, even if the surface smoothing layer 2 is formed on the black mask B as in the first conventional example, it is difficult to make only the concave portion thick and the convex portion thin in one coating operation. Then, irregularities due to the black mask B appear on the surface.

Therefore, in the segment display portion S where the black mask B is not provided, the in-plane spacer 3 falls to a lower place, and a height difference occurs between the in-plane spacer 3 and the in-plane spacer 3 on the black mask B.

As a result, as shown exaggeratedly in FIGS. 6 and 7, the other glass substrate 1b may be distorted, causing color unevenness (lighting unevenness). The same applies to the dot matrix display type, with segment display,
In any case of the dot matrix display, the color unevenness phenomenon remarkably appears particularly when the width or the length of the display portion is 400 μm or more.

In order to fill the steps formed by the black mask B and make the cell gap surface uniform, for example, a surface smoothing layer is preferably formed a plurality of times on the surface smoothing layer 2 of the first conventional example. However, this method is not a preferable method because not only the number of manufacturing steps increases but also the thickness of the panel itself is affected.

[0012]

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a display portion on which a black mask is not originally provided with an adverse effect on the display. It is an object of the present invention to provide a liquid crystal display panel having a support wall of an in-plane spacer that does not cause distortion in a glass substrate.

According to the present invention, an object of the present invention is to provide a pair of glass substrates having a transparent electrode, and a black mask for shielding light other than the display portion is provided on the inner surface of one of the glass substrates. Liquid crystal display panel, at least one of the width and the length is 400
When a specific display portion having a size of at least μm is provided, a supporting wall having a height substantially equal to the thickness of the black mask is formed on the inner surface of the one transparent glass substrate corresponding to the specific display portion. In forming the shape
Assuming that the width of the support wall is Wb and the interval between the support walls is Wp, the interval Wp of the support wall is 6 × Wb ≦ Wp ≦ 15 × W
b.

For example, when the width of the support wall is 30 μm, the arrangement pitch is set within a range of 180 to 450 μm. When the width of the support wall is 10 μm, the arrangement pitch is set within a range of 60 to 150 μm. Is done. According to this, without deteriorating the brightness (brightness) of the display portion,
The flatness of the glass substrate can be maintained.

When the distance Wp between the support walls is less than 6 × Wb, a large number of in-plane spacers can be supported at substantially the same height as the thickness of the black mask.
It is not preferable because the brightness of the display portion is sacrificed.

Further, when the distance Wp between the support walls exceeds 15 × Wb, sufficient brightness can be obtained, but the majority of the in-plane spacers fall into the concave portions of the display portion. It is not preferable because it becomes difficult to maintain the degree.

If the width of the support wall is too large, a phenomenon occurs in which the presence of the support wall is visually recognized. On the other hand, if the width of the support wall is too narrow, there is a problem in terms of strength as a support wall. Therefore, in the present invention, the width Wb of the support wall is 5 to 50.
μm, particularly preferably in the range of 10 to 30 μm.

By the way, the width Wb of the supporting wall is set to a minimum of 5 μm.
m, and the arrangement pitch is also 6 times the minimum, 5 × 6 = 3
Support walls will be provided at 0 μm intervals. Even in this case, there is no problem in terms of brightness because the width Wb of the support wall is narrow.

On the other hand, the width Wb of the support wall is set to a maximum of 5
0 μm, and even if the arrangement pitch is 15 times the maximum, 50 μm
× 15 = 750 μm, and the size of the display part is 400
It is possible to sufficiently cope with the case where the thickness is not less than μm.

In forming the support wall, the material is not particularly limited. However, in order to avoid duplication of the manufacturing process, the support wall is preferably formed from the same material as the black mask. For example, the support wall can be formed at the same time when the black mask is formed.

[0021]

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in more detail with reference to an embodiment shown in the drawings. Note that the liquid crystal display panel of this embodiment is a segment display type having the same display pattern as that of FIG. 5 described above, and in order to facilitate comparison with each of the above-described conventional examples, FIG. Both of the second embodiment in FIG. 2 are shown as cross-sectional views along the line AA in FIG.

The first embodiment of FIG. 1 corresponds to the first conventional example, and the second embodiment of FIG. 2 corresponds to the second conventional example. In each of these embodiments, one of the glass substrates is used. 1a
The black mask B is provided on the non-display portion except the segment display portion on the inner surface side of the.

Here, in FIGS. 1 and 2 (sectional views taken along the line AA of the display pattern in FIG. 5), if the segment display portion having a width of 400 μm or more in the segment display portion is Sa, the segment display portion Sa Inside the support wall 10
Are formed in a lattice shape. The height of the support wall 10 is substantially the same as the thickness of the black mask B.

In the first embodiment shown in FIG. 1, a surface smoothing layer 2 having a predetermined thickness is provided on the black mask B and the support wall 10, and a transparent electrode (not shown) is provided thereon.
Are formed. On the other hand, in the second embodiment shown in FIG. 2, a transparent electrode (not shown) is directly provided on the glass substrate 1a having the black mask B and the support wall 10 without providing the surface smoothing layer 2. Is formed.

In the same manner as in the above-mentioned conventional example, in each embodiment, for example, an in-plane spacer 3 is scattered on one glass substrate 1a, and a peripheral sealing material (not shown) is provided around the other glass substrate 1b on the opposite side. After coating, both glass substrates 1
The cells a and 1b are pressure-bonded via a peripheral sealing material, and a predetermined liquid crystal substance is injected into the cell gap.

FIG. 3 is a plan view showing a typical example of the support wall 10 provided in the segment display portion Sa. In this case, assuming that the segment display portion Sa is 400 μm both vertically and horizontally, the support wall 10 is arranged in a cross shape at the center thereof. The support wall 10 may be formed along a diagonal line of the segment display portion Sa as shown by a chain line in FIG.

The support wall 10 is preferably a black mask B
The width Wb is selected from the range of 5 to 50 μm. Also, the arrangement pitch Wp of the support wall 10
Is appropriately set in a range of 6 × Wb ≦ Wp ≦ 15 × Wb, that is, in a range of 6 times or more and 15 times or less of the width Wb of the support wall 10.

According to the width Wb and the arrangement pitch Wp of the support wall 10, the load-bearing strength of the support wall 10 and the brightness (luminance) when the segment display portion Sa is lit can be made compatible. In addition, the black mask B may be regarded as a kind of the support wall, and in the example of FIG.
The arrangement pitch of the support walls 10 is 200 μm.

Next, a modification of the support wall 10 shown in FIGS. 4A to 4D will be described. These figures are all plan views. In the present invention, the support wall 1
The zeros are arranged in a grid, but the definition of "grid" should not be interpreted strictly.

For example, as shown in FIG.
Basically, it suffices to include a trunk first support wall member 110 extending vertically in the drawing and a branch second support wall member 120 extending horizontally in the drawing. There is no limitation on the number of the first and second support wall members 120. The intersection angle between the first support wall member 110 and the second support wall member 120 does not necessarily have to be a right angle, and may intersect at any angle.

As shown in FIG. 4A, a plurality of support walls 10 having the same shape may be arranged in parallel. in this case,
The arrangement pitch Wp is the pitch Wp1 between the first support wall members 110, 110 and the second support wall members 120, 120.
The smaller of the two pitches is 6 × W
It is sufficient that the range of b ≦ Wp ≦ 15 × Wb is satisfied.

Further, as shown in FIG. 4B, by modifying FIG. 4A, a plurality of support walls 10 having the same shape can be juxtaposed with their phases shifted. Further, as shown in FIG. 4C, the branch second support wall member 120 may be crossed with the trunk first support wall member 110 by changing the length to the left and right. . The example of FIG. 4C will be often adopted particularly when the segment display portion Sa has a complicated shape such as the star shape shown in FIG. In the example of the star shape display in FIG. 5, the support wall may be arranged concentrically in parallel with the outline of the star shape.

Further, as shown in FIG. 4 (d), the support wall 10 may have a diamond-shaped lattice unit. Further, the support wall may have a curvature like an arc. As described above, the support wall 10 of the present invention includes each of the above-described examples and those having a similar shape.

[0034]

Next, specific examples of the present invention and comparative examples will be described. For each example, the in-plane uniformity (substrate flatness) and the brightness at the time of lighting were evaluated. "Excellent" was evaluated as "very good", "" as "good", and "" as poor. Δ ”and extremely bad cases were rated“ x ”. These were combined and a comprehensive evaluation was performed in five stages. The evaluation was “1”, which was fairly good, “2”, which was fairly good, “3”, which was normal, “4”, which was slightly bad, and “5”, which was fairly poor.

<< Example 1; Wb 30 μm, Wp 300 μ
m (see FIG. 1) >> A mother substrate is prepared by sputtering an alkali prevention film of silica to a thickness of about 200 ° on one surface on the inner surface side of a glass substrate having a thickness of 0.7 mm by sputtering. A plurality of 90 × 40 mm segment display patterns shown in FIG. 5 are laid out on a mother substrate, and a liquid crystal display panel having the structure of the first embodiment shown in FIG. Made. First,
On the mother substrate, a negative photosensitive black mask material is formed into a film having a thickness of about 1.5 μm by spin coating,
Exposure of 300 to 500 mJ was performed through a photomask that shields the segment display portion and a portion outside the peripheral seal material provided in the liquid crystal cell, and was developed, dried, and baked to form a black mask (black solid in FIG. 5). Section). At this time, a support wall having a width of 30 μm and a thickness of 300 μm made of the same material as the black mask material is provided on a specific segment display portion in which at least one of the length and the width of the segment display portion is 400 μm or more.
At a pitch of. That is, the arrangement pitch Wp of the support walls was set to 10 times the width Wb of the support walls. For reference, when the black mask and the support wall were formed by a printing method in parallel, the same appearance was obtained. Next, on this mother substrate, a transparent resin manufactured by JSR Co. as a surface smoothing material was applied to a thickness of about 2 μm using a spinner and dried to form a surface smoothing layer. Thereafter, a transparent conductive film (ITO) of about 1500 ° was formed on the surface smoothing layer by a sputtering method at a temperature of 230 ° C. in an atmosphere. And apply photoresist on it,
After exposing and developing the segment display portion and its wiring portion through a photomask that shields light, unnecessary transparent conductive films were removed by etching, and the photoresist was peeled off to obtain one mother electrode substrate. As for the opposing mother substrate, an alkali prevention film and a transparent conductive film were sequentially formed, and this was used as the other mother electrode substrate. An alignment film of about 500 ° was formed on both mother electrode substrates. For the other mother electrode substrate, a transparent insulating film made of silica and titanium oxide was formed before forming the alignment film. After rubbing the alignment film of each substrate, about 15,000 in-plane spacers having an average particle diameter of 6 μm per cm ² were sprayed on one mother electrode substrate. A peripheral sealing material made of epoxy resin was applied to the other mother electrode substrate by printing. Then, both mother electrode substrates were thermocompression-bonded to each other, and an injection port was formed. Then, a nematic liquid crystal was injected into the cell gap by a vacuum injection method, and the injection port was sealed with an ultraviolet curable resin. When the in-plane uniformity (flatness of the substrate) and the brightness at the time of lighting were evaluated for the liquid crystal display panel manufactured as described above, the in-plane uniformity was extremely good. The brightness at the time of lighting was somewhat good and was evaluated as ○. The overall evaluation was “1”, which is the highest.

<< Example 2; Wb 30 μm, Wp 200 μ
m (see FIG. 1) >> A support wall having a width of 30 μm was formed in a lattice pattern at a pitch of 200 μm on a specific segment display portion in which at least one of the length and the width was 400 μm or more. That is, the arrangement pitch Wp of the support walls
The segment display type liquid crystal display panel was manufactured in the same manner as in Example 1 except that the width was set to about 6.7 times the width Wb of the support wall. Since the in-plane uniformity was very good, it was evaluated as the highest ◎. Since the brightness at the time of lighting was slightly worse than that of the first embodiment, the brightness was set in the range of Δ to ○. The overall evaluation was set at "2", which was slightly better.

<Comparative Example 1: No Support Wall (See FIG. 1)> A specific segment display portion having at least one of a length and a width of 400 μm or more is left as it is without providing a support wall. A segment display type liquid crystal display panel was manufactured in the same manner as in Example 1. The brightness at the time of lighting was extremely good and the evaluation was the highest ◎, but the in-plane uniformity was extremely poor and was evaluated as x. Therefore, the overall evaluation was set to "5", which is extremely poor.

Comparative Example 2 Wb 30 μm, Wp 120 μ
m (see FIG. 1)> A support wall having a width of 30 μm was formed in a grid pattern at a pitch of 120 μm on a specific segment display portion having at least one of a length and a width of 400 μm or more. That is, the arrangement pitch Wp of the support walls
The segment display type liquid crystal display panel was manufactured in the same manner as in Example 1 except that the width was set to four times the width Wb of the support wall. The in-plane uniformity was extremely good and the highest ◎,
The brightness at the time of lighting was bad and the evaluation was x. The overall evaluation was normal "3".

Comparative Example 3 Wb 30 μm, Wp 500 μ
m (see FIG. 1)> A support wall having a width of 30 μm was formed in a grid pattern at a pitch of 500 μm on a specific segment display portion having at least one of a length and a width of 400 μm or more. That is, the arrangement pitch Wp of the support walls
The segment display type liquid crystal display panel was manufactured in the same manner as in Example 1 except that the width was set to about 16.7 times the width Wb of the support wall. The brightness at the time of lighting is somewhat good and its evaluation is ○
However, the in-plane uniformity was poor and was evaluated as x. The overall evaluation was normal "3".

Comparative Example 4 Wb 30 μm, Wp 1000
μm (see FIG. 1)> A support wall having a width of 30 μm was formed in a lattice shape at a pitch of 1000 μm on a specific segment display portion having at least one of a length and a width of 400 μm or more. That is, a segment display type liquid crystal display panel was manufactured in the same manner as in Example 1 except that the arrangement pitch Wp of the support walls was set to about 33.3 times the width Wb of the support walls. The brightness at the time of lighting was extremely good, and the evaluation was the highest ◎, but the in-plane uniformity was extremely poor.
Was evaluated. The overall evaluation was somewhat poor, "4".

Example 3 Wb 10 μm, Wp 100 μ
m (see FIG. 1) >> A support wall having a width of 10 μm was formed in a grid pattern at a pitch of 100 μm on a specific segment display portion having at least one of a length and a width of 400 μm or more. That is, the arrangement pitch Wp of the support walls
Example 1 except that was set to 10 times the width Wb of the support wall.
In the same manner as in the above, a segment display type liquid crystal display panel was manufactured. Since the in-plane uniformity was very good, it was evaluated as the highest ◎. Further, the brightness at the time of lighting was slightly good, and therefore, the overall evaluation was set to the highest “1”.

Example 4 Wb 10 μm, Wp 60 μm
(See FIG. 1) >> A support wall having a width of 10 μm was formed in a grid pattern at a pitch of 60 μm on a specific segment display portion having at least one of a length and a width of 400 μm or more. That is, a segment display type liquid crystal display panel was manufactured in the same manner as in Example 1 except that the arrangement pitch Wp of the support walls was set to be six times the width Wb of the support walls.
Since the in-plane uniformity was very good, it was evaluated as the highest ◎. The brightness at the time of lighting was also in the range of Δ to △, and the overall evaluation was set to “2”, which was slightly better.

Example 5; Wb 10 μm, Wp 150 μ
m (see FIG. 1) >> A support wall having a width of 10 μm was formed in a grid pattern at a pitch of 150 μm on a specific segment display portion in which at least one of the length and the width was 400 μm or more. That is, the arrangement pitch Wp of the support walls
Example 1 except that the width was set to 15 times the width Wb of the support wall.
In the same manner as in the above, a segment display type liquid crystal display panel was manufactured. The in-plane uniformity was in the range of Δ to ○. The brightness at the time of lighting was very good ◎, and the overall evaluation was slightly good “2”.

<Comparative Example 5: Wb 10 μm, Wp 40 μm
(See FIG. 1)> A support wall having a width of 10 μm was formed in a grid pattern at a pitch of 40 μm on a specific segment display portion having at least one of a length and a width of 400 μm or more. That is, a segment display type liquid crystal display panel was manufactured in the same manner as in Example 1 except that the arrangement pitch Wp of the support walls was set to four times the width Wb of the support walls.
The in-plane uniformity was extremely good and the highest ◎, but the brightness at the time of lighting was poor and the evaluation was ×. The overall evaluation was “4”.

Comparative Example 6: Wb 10 μm, Wp 300 μ
m (see FIG. 1)> A support wall having a width of 10 μm was formed in a lattice shape at a pitch of 300 μm on a specific segment display portion in which at least one of the length and the width was 400 μm or more. That is, the arrangement pitch Wp of the support walls
Example 1 except that was set to 30 times the width Wb of the support wall.
In the same manner as in the above, a segment display type liquid crystal display panel was manufactured. The brightness at the time of lighting was extremely good and the evaluation was the highest ◎, but the in-plane uniformity was extremely poor and was evaluated as x. The overall evaluation was somewhat poor, "4".

Example 6: Wb 30 μm, Wp 300 μ
m (see FIG. 2) >> In the first embodiment, the surface smooth layer is formed on one mother substrate provided with the black mask and the support wall. In the sixth embodiment, the surface smooth layer is formed. A transparent conductive film was formed on the mother substrate, and a liquid crystal display panel having the structure of the second embodiment shown in FIG. That is, also in Example 6, a support wall having a width of 30 μm was formed in a lattice shape at a pitch of 300 μm in a specific segment display portion in which at least one of the length and the width was 400 μm or more. That is, the arrangement pitch Wp of the support walls was set to 10 times the width Wb of the support walls. In the evaluation, as in Example 1, the in-plane uniformity was very good き わ め て, and the brightness at the time of lighting was also slightly good ○. The overall evaluation was the highest “1”.

Example 7: Wb 30 μm, Wp 200 μ
m (see FIG. 2) >> A support wall having a width of 30 μm was formed in a lattice shape at a pitch of 200 μm on a specific segment display portion having at least one of a length and a width of 400 μm or more. That is, the arrangement pitch Wp of the support walls
The segment display type liquid crystal display panel was manufactured in the same manner as in Example 6 except that the width was set to about 6.7 times the width Wb of the support wall. Since the in-plane uniformity was very good, it was evaluated as the highest ◎. Since the brightness at the time of lighting was slightly worse than that of the first embodiment, the brightness was set in the range of Δ to ○. The overall evaluation was set at "2", which was slightly better.

<Comparative Example 7: No support wall (see FIG. 2)> At least one of the length and the width is 400 μm or more, and the specific segment display portion is left as it is without providing a support wall. In the same manner as in Example 6, a segment display type liquid crystal display panel was manufactured. The brightness at the time of lighting was extremely good and the evaluation was the highest ◎, but the in-plane uniformity was extremely poor and was evaluated as x. Therefore, the overall evaluation was set to "5", which is extremely poor.

Comparative Example 8: Wb 30 μm, Wp 120 μ
m (see FIG. 2)> A support wall having a width of 30 μm was formed in a grid pattern at a pitch of 120 μm on a specific segment display portion having at least one of a length and a width of 400 μm or more. That is, the arrangement pitch Wp of the support walls
The segment display type liquid crystal display panel was manufactured in the same manner as in Example 6 except that the width was set to four times the width Wb of the support wall. The in-plane uniformity was extremely good and the highest ◎,
The brightness at the time of lighting was bad and the evaluation was x. The overall evaluation was normal "3".

<Comparative Example 9: Wb 30 μm, Wp 500 μ
m (see FIG. 2)> A support wall having a width of 30 μm was formed in a grid pattern at a pitch of 500 μm on a specific segment display portion having at least one of a length and a width of 400 μm or more. That is, the arrangement pitch Wp of the support walls
The segment display type liquid crystal display panel was manufactured in the same manner as in Example 6 except that the width was set to about 16.7 times the width Wb of the support wall. The brightness at the time of lighting is somewhat good and its evaluation is ○
However, the in-plane uniformity was poor and was evaluated as x. The overall evaluation was normal "3".

<Comparative Example 10: Wb 30 μm, Wp 100
0 μm (see FIG. 2)> A support wall having a width of 30 μm was formed in a grid pattern at a pitch of 1000 μm on a specific segment display portion having at least one of a length and a width of 400 μm or more. That is, except that the arrangement pitch Wp of the support walls is set to about 33.3 times the width Wb of the support walls,
A segment display type liquid crystal display panel was manufactured in the same manner as in Example 1. The brightness at the time of lighting was extremely good and the evaluation was the highest ◎, but the in-plane uniformity was extremely poor and was evaluated as x. The overall evaluation was somewhat poor, "4".

Example 8: Wb 30 μm, Wp 250 μ
m (see FIG. 3) >> In manufacturing a dot matrix display type liquid crystal display panel having one display pixel size of 500 × 500 μm in the same procedure as in the first embodiment, the eighth embodiment is shown in FIG. Thus, a support wall having a central width Wb of 30 μm in the pixel was formed in a cross shape. In this example, the arrangement pitch Wp is 250 μm and the width Wb
It is about 8.3 times. The in-plane gap accuracy was uniform and a good display state was obtained.

<Comparative Example 11: No support wall (see FIG. 3)>
When a dot matrix display type liquid crystal display panel having a display pixel size of 500 × 500 μm was produced in the same manner as in Example 8 without forming a support wall in the pixel, color unevenness (lighting unevenness) was observed at the pixel center. occured.

[0054]

As described above, according to the present invention,
In a liquid crystal display panel of an inner surface black mask type, a support wall having a width of Wb is provided on a specific display portion having at least one of a width and a length of 400 μm or more, at a width of at least 6 times the width Wb. And by arranging it in a grid with a pitch of 15 times or less Wp,
Distortion of the glass substrate which causes color unevenness (lighting unevenness) can be prevented without sacrificing brightness at the time of lighting.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a first embodiment of the present invention.

FIG. 2 is a schematic sectional view showing a second embodiment of the present invention.

FIG. 3 is a plan view showing a typical example of a support wall provided in a segment display portion in each of the above embodiments.

FIG. 4 is a plan view showing a modification of the support wall.

FIG. 5 is a plan view showing a display pattern example of a segment display type liquid crystal display panel.

FIG. 6 is a schematic cross-sectional view of the first conventional example taken along line AA of FIG. 5;

FIG. 7 is a schematic sectional view of the second conventional example, taken along line AA of FIG. 5;

[Explanation of symbols]

 1a, 1b Glass substrate 2 Surface smoothing layer 3 In-plane spacer 10 Support wall 110, 120 Support wall member Sa Segment display portion B Black mask

Continued on the front page F term (reference) 2H089 LA10 LA11 LA20 MA07Z NA14 NA25 NA40 NA45 NA48 QA04 TA05 2H091 FA34Y FD04 GA08 LA18 LA20 5C094 AA03 AA43 AA55 BA43 CA14 CA19 EB02 ED15 FA02 JA08

Claims (3)

[Claims] 1. A liquid crystal display panel comprising a pair of glass substrates each having a transparent electrode, wherein a black mask for shielding a portion other than a display portion from light is provided on an inner surface side of one of the glass substrates. Or at least one of the lengths is 400 μm
If you have a specific display part that is sized above,
On the inner surface side of the one transparent glass substrate corresponding to the specific display portion, a support wall having a height substantially equal to the thickness of the black mask is formed in a lattice shape, and the width of the support wall is set to Wb. A liquid crystal display panel, wherein the distance between the support walls is Wp, and the distance Wp between the support walls is 6 × Wb ≦ Wp ≦ 15 × Wb. 2. The liquid crystal display panel according to claim 1, wherein the width Wb of the support wall is in a range of 5 to 50 μm. 3. The liquid crystal display panel according to claim 1, wherein the support wall is made of the same material as the black mask.