JPH01269917A - Color liquid crystal display element - Google Patents

Abstract

PURPOSE:To easily form an inter-substrate spacing and to enable beautiful color display by providing a light shielding film and color filters even to the peripheral part on the outer side of a display part where electrode groups face each other and make display. CONSTITUTION:The color filters 3 are provided to the picture element parts 2 of the display part 1 where the electrode groups faces each other and make display; in addition, the light shielding films 4 are provided between the picture elements. The same light shielding film 6 as the light shielding films provided between the picture elements of the display part 1 is provided over the entire surface to the peripheral part 5 on the outer side of the display part 1. The color filters 7 which are the same color filters as the color filters 3 in the picture element parts 2 of th4e display part 1 and has the area of 50-100% of the area of the color filters 3 in the picture element parts 2 of the display part are provided. The uniform inter-substrate spacing is thereby easily maintained even if said spacing is of a large area. The color display having the high display grade is thus obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a color liquid crystal display element suitable for color, high-density display.

[Prior Art] In recent years, color liquid crystal display elements in which a light-shielding film and a color filter are provided on the inner surface of a liquid crystal display element have begun to attract attention.

One of these is TPT, which has been put into practical use in LCD televisions, etc.
There is an active matrix liquid crystal display element in which an active matrix element such as MIM or MIM is provided for each pixel.

In the case of this active matrix liquid crystal display element,
Since each pixel is driven statically or driven to a similar extent, the gap between the liquid crystal layers is not required to be controlled very strictly.

However, it is difficult to make such active matrix liquid crystal display elements large, and while they are suitable for small portable televisions, etc., they are not suitable for displays such as personal computers and word processors, which require large and high-density displays. was difficult to apply.

On the other hand, for this purpose, a dynamically driven twisted nematic (TN) type dot matrix liquid crystal display element may be used instead of the conventionally used active matrix element.

Since this TN type dot matrix liquid crystal display element does not have an active matrix element for each pixel,
Although devices with large, high-density displays can be manufactured easily, there is a drawback in that the display quality deteriorates.

In other words, 640 x 400, which is commonly used in personal computers, etc.
In the case of a dot-like display, the drive duty number is 1.
/200 duty, making it difficult to obtain an extremely poor contrast ratio at an extremely narrow viewing angle.For this reason, even if color display was attempted, RGBB color display was at best, and gradation display was almost impractical.

In recent years, super-twist liquid crystal display elements have been put into practical use as a method for high-density dot matrix display by increasing the twist angle of liquid crystal molecules between both electrodes to cause sharp voltage-transmittance changes.

However, in this method, the value of the product Δn-d of the birefringence Δn of the liquid crystal of the liquid crystal display element used and the thickness d of the liquid crystal layer is substantially between 0.8 and 1.2 μm, and the display color is A high contrast ratio was obtained only with specific combinations of hues, such as yellow-green and dark blue, bluish-purple and pale yellow.

As described above, since this liquid crystal display element could not perform black and white display, it had the disadvantage that it could not perform multicolor or full color display when combined with a microcolor filter.

In contrast, a reversely twisted liquid crystal cell is stacked on top of this highly twisted liquid crystal cell for dot display as a means of compensating for birefringence, and the circularly polarized light generated in the dot displaying liquid crystal cell is transferred to the reversely twisted liquid crystal cell. It has been proposed to compensate for this, eliminate the coloration unique to supertwist liquid crystal display elements, and provide a nearly black and white display.

Therefore, by using such a birefringence compensating means, a display that is close to white and black can be obtained, which has created the possibility of using a color filter for color display.

In particular, by using this color filter together with a light-shielding film and forming both of them within a cell, a color liquid crystal display element with no misalignment and an apparently high contrast ratio can be obtained.

[Problem to be solved by the invention H1 However, since a super-twist liquid crystal display element using birefringence using such a highly twisted liquid crystal cell utilizes birefringence, slight deviations in the thickness of the liquid crystal layer may occur. is displayed as a color, and if the thickness of the liquid crystal layer, which is the gap between the substrates, is not kept extremely uniform, color unevenness will occur and the display will become dirty.
This has the disadvantage that the display quality is significantly degraded.

For this reason, there has been a desire for a color liquid crystal display element that is easy to maintain uniformity even if the gap between the substrates is large and has high display quality.

(Means for Solving Section 1) The present invention has been made to solve the above-mentioned problems, and in a color liquid crystal display element in which a light-shielding film and a color filter are provided on the inner surface of the cell, electrode groups thereof face each other. A color liquid crystal display element characterized in that a light-shielding film and a color filter are provided also in the outer peripheral part of the display part that displays images.
In a color liquid crystal display element in which a thin light-shielding film and a thick color filter are provided on the inner surface of the cell, in the display section where the electrode groups face each other to display images, the color filter is provided in the pixel portion, and the color filter is provided between the pixels. A light-shielding film is provided on the outside of the display section, and a light-shielding film that is the same as the light-shielding film provided between the pixels of the display section is provided on the entire surface of the outer peripheral area of the display section, and a color filter that is the same as the color filter of the pixel portion of the display section is provided on the entire surface. A color liquid crystal display element characterized in that it is provided with a color filter whose area is 50 to 100% of the area of the color filter in the pixel portion of the display section, and a thick light shielding film and a thick color filter are provided on the inner surface of the cell. In a color liquid crystal display element installed in Also, a color liquid crystal display element characterized by having the same light-shielding film and the same color filter with the same pattern as the display part, and a color liquid crystal display device having a thick light-shielding film and a thick color filter on the inner surface of the cell. In a display element, in a display part where electrode groups face each other to display a display, a color filter is provided in the pixel part and a light-shielding film is provided between the pixels. A light-shielding film that is the same as the light-shielding film provided between pixels is provided on the entire surface, and the color filter is the same as the color filter in the pixel part of the display part, and its area is 5 to 50% of the area of the color filter in the pixel part of the display part. A color liquid crystal display element characterized by being provided with a filter, and a color liquid crystal display element thereof, wherein the liquid crystal display element has a liquid crystal layer with a twist angle of 160 to 300 degrees, and an ellipse formed by this liquid crystal layer. The present invention provides a color liquid crystal display element characterized by having a structure in which birefringence compensating means for compensating polarization is laminated.

In the present invention, a color filter and a light shielding film are provided on the inner surface of a substrate of a liquid crystal display element. Depending on the thickness of the color filter and light shielding film provided in this display section, the thickness of the liquid crystal layer over the entire cell can be kept more uniform by changing the composition of the color filter and light blocking film provided in the peripheral area other than the display section. I can do it.

The liquid crystal display element used in the present invention basically has a structure in which a liquid crystal material such as nematic liquid crystal or smectic liquid crystal is sealed between a pair of substrates that have been subjected to alignment treatment and provided with electrodes. A color filter and a light shielding film are provided on the inner surface of the cell.

Specifically, a cell is constructed by arranging a group of strip-shaped row electrodes provided on one substrate and a group of strip-shaped column electrodes provided on the other substrate so as to face each other at right angles thereto. ,
There is a dot matrix liquid crystal display element in which a liquid crystal material is sealed between the electrodes.

The liquid crystal display element used in the present invention may be a normal TN type liquid crystal display element, but is particularly a super twist liquid crystal display element which requires uniformity in the thickness of the liquid crystal layer, and which does not require a color filter. The effect is great when applied to a black and white supertwist liquid crystal display element that uses birefringence compensating means, which displays black and white when not provided.

This black and white super twist liquid crystal display element is a display liquid crystal cell in which a liquid crystal layer with a liquid crystal twist angle of 160 to 300'' is sandwiched between substrates with electrodes. A liquid crystal cell for interference that has a liquid crystal layer that is oppositely twisted to the liquid crystal cell for display and has the same degree of twist angle or deviated from the twist angle by 60 to 120 degrees, or a birefringent cell that can perform similar birefringence compensation. A stack of birefringence compensating means made of plates can be used.

A pair of polarizing plates is placed outside the display liquid crystal cell and the birefringence compensating means. In this case, the twist angle, orientation direction, polarization axis direction, etc. may be adjusted as appropriate so that the display becomes close to black and white.

A black-and-white supertwist liquid crystal display element with such birefringence compensating means as an flI layer uses the birefringence compensating means to compensate for the circularly polarized light that has passed through the display liquid crystal cell, and when no color filter is provided, the black and white supertwisted liquid crystal display element is Display is obtained.

In the present invention, both the color filter and the light shielding film are provided on the inner surface of a display liquid crystal cell.

As this color filter, a thick film color filter having a thickness of 1 to several micrometers can be used, such as a color dyeing method, a color ink printing method, a photoetching method using a photocurable color ink, or an electrodeposition method.

The light-shielding film can be a thick light-shielding film with a thickness of 0.8 to several μm, such as black dyeing method, black ink printing method, photoetching method using photocurable black ink, electrodeposition method, or nickel plating or chromium. Thickness of metal thin film such as vapor deposition is 0.5μ
Both thin film light-shielding films with a thickness of less than m can be used.

These color filters and light shielding films may be provided between the substrate and the electrode, or between the electrode and the alignment film, or one may be provided below the electrode and the other above the electrode. It may also be provided.

In the present invention, such a light-shielding film and a color filter are provided in the display section where the electrode groups face each other to display a display, and the light-shielding film is also provided in the peripheral area outside the display section and inside the seal. and a color filter.

In the present invention, a pixel is formed with electrodes facing each other. Specifically, in the above-mentioned dot matrix type liquid crystal display element, a band-shaped row electrode group and 1. The portion where a band-shaped column electrode group perpendicular to this overlaps becomes a pixel.

In the color liquid crystal display element of the present invention, in order to ensure that the pixel portion of the display section is sufficiently covered with the color filter, the pattern of the color filter is made larger than the pattern of the opening of the light-shielding film. The periphery of the filter is made to overlap the light shielding film between the pixels. Therefore, in the display section, there is a portion where the color filter and the light shielding film overlap.

However, when a thick light-shielding film is used, the thickness tends to be non-uniform even if a flattening layer is provided thereon due to the overlap between the light-shielding film and the color filter. In order to alleviate this problem even if a thick light-shielding film is used, it is preferable that the thickness of the light-shielding film be made thinner than the thickness of the color filter.

On the other hand, if only the light-shielding film is formed in the peripheral area, the film thickness in the peripheral area will be thinner than that in the display area, making it difficult to control the substrate gap uniformly over the entire surface of the cell. However, by adopting the configuration of the present invention, the film thickness of the peripheral portion can be substantially the same as that of the display portion, so that it is easy to control the substrate gap uniformly over the entire surface of the cell.

The present invention is suitable for a color liquid crystal optical element in which a color filter and a light shielding film are formed between a substrate and an electrode, but it can also be used in a color liquid crystal optical element in which a color filter and a light shielding film are formed on an electrode. .

This is because if a thick color filter and a light-shielding film are provided on the electrode, the display quality will deteriorate, so it is preferable to provide a color filter and a light-shielding film below the electrode.

The present invention will be explained in more detail below with reference to the drawings.

Figure 1 is a plan view showing the pattern of the light shielding film and color filter near the boundary between the display area and the peripheral area in an example in which a thin light shielding film and a thick color filter are applied to a color liquid crystal display element provided on the inner surface of the cell. It is.

Note that in this figure, only the upper left corner of the color liquid crystal display element is enlarged for clarity; in an actual color liquid crystal display element, the lower right corner, lower left corner,
A similar pattern is adopted in the lower right corner portion, and a peripheral portion is formed around the display portion. The same applies to other examples below, and only the left-E space is shown in an enlarged manner in the figure.

In this figure, in a display unit 1 whose electrode groups face each other for display, a color filter 3 is provided in a pixel portion 2.
At the same time, a light-shielding Jl@4 is provided between the pixels, and a light-shielding film WA6, which is the same as the light-shielding film provided between the pixels of the display part, is provided on the entire surface of the peripheral area 5 outside the display part. A color filter 7 is provided which is the same color filter as the color filter 3 and whose area is 50 to 100% of the area of the color filter 3 in the pixel portion of the display section.

In such a color liquid crystal display element, as shown in a cross-sectional view in FIG. The pattern of the color filter 3 is made larger than the pattern of the color filter 3 so that the peripheral part of the color filter 3 overlaps with the light-shielding film between the pixels.

Therefore, in the display section, the color filter 3 and the light shielding film 4 are
There will be an overlapped area. Note that 8 is a substrate, 9 is a color filter 3 and a light shielding layer [4], and a flattening layer formed on
10 further indicates an electrode formed thereon.

In the present invention, the outer peripheral area 5 of such a display unit also includes:
The same light-shielding film as the light-shielding film provided between the pixels of the display section [I6] is provided on the entire surface, and the area is 50 to 50 times the area of the color filter 3 of the pixel section of the display section. A color filter 7 that is 100% is provided.

As a result, the color filter 7 and the light shielding film 6 are partially laminated in the peripheral area as well, similar to the display area, and it is easy to control uniform gaps when forming cells by placing spacers on the inner surface of the cell. Can be done.

In the case of a color liquid crystal display device that has a thin light-shielding film and a thick color filter on the inner surface of the cell, the light-shielding film is thinner than the color filter, so the color filter at the periphery is thinner than the color filter. The area of 7 is 50 to 100% of the area of the color filter 3 in the pixel portion.

In particular, the thickness of the light-shielding film is 175 mm thicker than that of the color filter.
In cases where the area of the color filter 7 in the peripheral area is the same as that of the color filter 30 in the pixel area, the mask, plate, etc. for forming the color filter may also be used for the peripheral area. It can be used for both the display section and only one is required, resulting in good productivity.

In addition, in this figure, only a few pixels are shown on the display section, but if necessary, 480 x 96 dots, etc.
An appropriate number of pixels such as 1920×640 dots may be provided.

Also, in the peripheral area, only one pixel on the upper side and three pixels on the left side (one set if you consider one set of three colors) are explained as the peripheral area, but the number of pixels in this peripheral area may be determined as appropriate depending on the width of the peripheral portion.Actually, it is often set from about several I1m to about twenty-odd I, so it may be set from several pixels to several tens of pixels.

Further, it is preferable to provide electrodes in the portion corresponding to the pixels in the peripheral portion in the same manner as in the display portion, since this further reduces the difference in thickness between the display portion and the peripheral portion.

Regarding these points, the same applies to the other examples below.

Figure 2 is a plan view showing the pattern of the light shielding film and color filter near the boundary between the display area and the peripheral area in an example in which a thick light shielding film and a thick color filter are applied to a color liquid crystal display element with a thick film color filter provided on the inner surface of the cell. It is a diagram.

In this figure, in a display section 11 whose electrode groups face each other to perform display, a color filter 13 is provided in the pixel portion 12 and a light shielding film 14 is provided between the pixels, and a peripheral portion 15 outside the display section is provided with a color filter 13 and a light shielding film 14 between the pixels. Also, the same light shielding 11i16 and the same color filter 17 with the same pattern as the display section are provided.

In this example, as in the example of FIG. 1, in order to ensure that the pixel portion 12 of the display section is sufficiently covered with the color filter 13, the pattern of the color filter 13 is set higher than the pattern of the opening of the light shielding B14. The color filter 13 is enlarged so that the peripheral portion of the color filter 13 overlaps with the light shielding film between the pixels. Therefore, in the display section, there is a portion where the color filter 13 and the light shielding lNi 14 overlap.

In the present invention, the same light-shielding film 16 as the light-shielding film 14 provided between the pixels of one display part is also provided in the outer peripheral area 15 of such a display part.
The same color filter 17 as the color filter 13 of the pixel portion of the display section is provided in the same pattern.

As a result, the color filter 17 and the light shielding film 16 are arranged in the peripheral area as well as in the display area, and even if both are thick films and partially overlap, the display area and the peripheral area have the same structure, and uniform gap control can be easily achieved when forming cells by arranging spacers on the inner surface of the cell.

Also, in this case, the patterns of the color filter 17 and the light-shielding film 16 in the peripheral area may be the same as those of the color filter 13 and the light-shielding film 14 in the pixel area. It can also be used for the display section, so only one is required, resulting in good productivity.

Figure 3 is a plan view showing the pattern of the light shielding film and color filter near the boundary between the display area and the peripheral area in an example in which a thick light shielding film and a thick color filter are applied to a color liquid crystal display element with a thick film color filter provided on the inner surface of the cell. It is a diagram.

In this figure, in a display section 21 where the electrode groups face each other to perform display, a color filter 23 is provided in the pixel portion 22, a light shielding film 24 is provided between the pixels, and a peripheral portion 25 outside the display section is provided with a color filter 23 and a light shielding film 24 between the pixels. The light shielding film 11126, which is the same as the light shielding film provided between the pixels of the display section, is provided on the entire surface, and the area is the same as the color filter 23 of the pixel section of the display section, and its area is the same as that of the color filter 23 of the pixel section of the display section. A color filter 27 of 5 to 50% is provided.

In this example, as in the example of FIG. 1, in order to ensure that the pixel portion 22 of the display section is sufficiently covered with the color filter 23, the light shielding Jl! The pattern of the color filter 23 is made larger than the pattern of the openings 24 so that the peripheral part of the color filter 23 overlaps with the light shielding film between the pixels. Therefore, in the display section, there is a portion where the color filter 23 and the light shielding film 24 overlap.

In the present invention, the same light-shielding film as the light-shielding film provided between the pixels of the display part is also provided in the peripheral area 25 outside the display part.
6 is provided on the entire surface, and a color filter 27 which is the same color filter as the color filter of the pixel part of the display part and whose area is 5 to 50% of the area of the color filter 23 of the pixel part of the display part is provided.

In this example, since both the color filter and the light-shielding film are N and a, the color filter 27 and the light-shielding film 26 are laminated in the same pattern as the display area at the periphery, as in the example shown in FIG. If you do, II! The thickness becomes extremely thick, and it is difficult to maintain a uniform gap between the substrates of the display section over the entire surface.

Therefore, as mentioned above, this can be corrected by setting the area of the color filter 27 that is exposed to the light-shielding film in the peripheral area to be 5 to 50% of the area of the color filter 23 in the pixel area of the display part. By arranging spacers on the inner surface, it is possible to easily control uniform gaps when forming cells.

In this way, the color filters in the peripheral area may be arranged in a similar pattern assuming that the pixels are arranged in the same way in the peripheral area. As mentioned above, if you want to make the pattern of the color filter in the peripheral area the same as that of the color filter in the display area, use the mask, plate, etc. for forming the color filter in the display area as is, and make it the same as the color filter in the display area. Productivity is good because they can be formed in the same way.

If the area of the color filter in the peripheral part is different from the area of the color filter in the display part, the pixels may be arranged at the same pitch as the pixel pitch in the display part, assuming that the pixels are arranged in the same way in the peripheral part. If the area is small as in the example shown in FIG. 3, the color filter may be formed with a pitch wider than the pixel pitch of the display section.

The present invention is suitable for super-twist liquid crystal display elements, ferroelectric liquid crystal display elements, etc., which require extremely m* substrate gap control and are capable of black-and-white display without using color filters.

In the present invention, the substrate constituting the liquid crystal cell may be an optically isotropic transparent substrate, and glass, plastic, etc. can be used.

Electrodes are formed on this substrate, and display is performed by turning on and off the liquid crystal by applying a voltage between desired electrodes. This electrode is usually ITO (IntOa-SnOw)
, SnO, etc. and A1. Low resistance leads such as Cr and Ti can be used and desired patterning can be achieved. A typical example of this is a dot matrix liquid crystal display device in which many rows and columns of electrodes are formed, with 640 striped electrodes formed on one substrate and striped electrodes perpendicular to these on the other substrate. 400 striped electrodes are formed, 6
A display similar to 4QX 400 dots is made.

As a treatment for aligning liquid crystal molecules, known rubbing methods, oblique evaporation methods, etc. can be used.
iOa,Tie,,A1. Films of inorganic materials such as O, etc.
Alternatively, an orientation treatment may be performed after forming a film of an organic material such as polyimide or polyamide.

In addition, for spacers, sealants, polarizing plates, reflectors, illumination means, drive circuits, etc., known configurations for liquid crystal display elements can be adopted.

In addition to this, the present invention also includes the following:
Various techniques used in ordinary liquid crystal display elements can be applied.

The color liquid crystal display device of the present invention is suitable as a color display device for personal computers, word processors, workstations, etc., but is also suitable for use in color liquid crystal televisions, color display fish finders, color display radars, color display devices, etc.
It can be used in various applications such as color display oscilloscopes and various consumer dot matrix display devices with color display.

[Effect 1] In the present invention, since the color filter and the light-shielding film are partially laminated and formed in the same way in the display part and its peripheral part, spacers are placed on the inner surface of the cell to form the cell. In this case, the substrate gap can be made substantially constant in both the display portion and its peripheral portion, and the substrate gap is substantially uniform over the entire surface of the cell.

In other words, if there is a part where the color filter and the light shielding film are partially laminated, when spacers are placed on the inner surface of the cell, some spacers will be distributed in this laminated part, and this part will be attached to the substrate. It works to thicken the gap.

For this reason, if only a light-shielding film is provided at the periphery, in the display area, where the color filter and the light-shielding film overlap, a portion of the height is partially higher than the periphery, and the display area The substrate gap at the periphery becomes wider than the substrate gap at the periphery, and there is a portion where the substrate gap gradually changes near the boundary between the display section and the periphery, which tends to cause color unevenness.

In the present invention, a color filter and a light shielding film having the same size as the display part or within a certain range are provided also in this peripheral part. As a result, in this peripheral area, an overlapping area is formed with approximately the same area as the overlapping area of the color filter and the light shielding film in the display area, and when spacers are sprayed, the gap between the substrates in the peripheral area and the display area are overlapped. The substrate gap is almost the same and uniform.

[Example 1 Next, embodiments of the present invention will be described in detail using the drawings.

Example 1 As shown in FIGS. 1 and 4, a thin Cr light-shielding film was formed on a glass substrate to a thickness of 100n11, and the surrounding area overlapped with the light-shielding film at the portion corresponding to the pixel of the electrode section. A thick film color filter of RGBa color with a thickness of 2.0 μm was formed by a dyeing method, and an overcoat film (flattening layer) made of polyimide was formed thereon.

An attempt was made to flatten the surface by providing a polyimide overcoat film as described above on the color filter and the light-shielding film, but it was difficult to flatten the surface completely. However, due to the overcoat film, the fine irregularities on the color filter are almost flattened, and the large irregularities around the pixels due to the overlap between the color filter and the light-shielding film are also significantly improved compared to when there is no overcoat film. Ta.

After that, ITO was coated on this and patterned to form a group of 960 striped column electrodes, and an insulating film of SiO□-Ties was then coated on the entire surface with 110 stripes.
The substrate was formed to have a thickness of 0 nm, a polyimide film was deposited thereon to a thickness of about 70 nm, and this was rubbed to form an alignment film to form a column electrode substrate.

240 striped row electrode groups are formed on a glass substrate so as to be perpendicular to the first column electrode group, and a thickness of 300 mm is formed over the entire surface.
After forming an insulating film of SiO□-TiO□ with a thickness of about 70 nm, polyimide was laminated to a thickness of about 70 nm, and when this was combined with the previous column electrode substrate to form a cell, the twist angle of the liquid crystal molecules was 24 nm.
．． An alignment film was formed by rubbing so that the angle was 0°, and a row electrode substrate was obtained.

In addition, in these substrates, the same electrodes as those provided in the display part were formed in a stripe shape also in the peripheral part other than the display part.

The column electrode substrate and the row electrode substrate were arranged so that the twist angle of the liquid crystal molecules was 240@, and the periphery was sealed to form a cell, and nematic liquid crystal was injected to produce a dot matrix liquid crystal cell.

In addition, we prepared two substrates in which polyimide was laminated to a thickness of about 70 nm on a glass substrate and then rubbed to form an alignment film. #A cell was formed by arranging and sealing around the periphery, and nematic liquid crystal was injected to produce an interference liquid crystal cell.

This dot matrix liquid crystal cell and the interference liquid crystal cell were placed in a tank, and a pair of polarizing plates were placed on both sides to produce a negative type liquid crystal display element.

This liquid crystal display element has a color filter and a light shielding film formed in the same pattern (same area) in the display area and the peripheral area, so the gap between the substrates is almost uniform in both the display area and the peripheral area, resulting in beautiful color display. It was possible.

In addition, in this type of liquid crystal display element, even if the refractive index anisotropy (Δn) of the liquid crystal material, the relationship between the alignment direction and the polarization axis, etc. are adjusted appropriately to make it a positive type liquid crystal display element, Since the area other than the pixel area is covered with a light-shielding film, it can be used as a negative-tone liquid crystal display element by applying a voltage to the area where you want to make it black, which is the opposite of driving a normal negative-tone liquid crystal display element. Can be used.

Therefore, whether the liquid crystal display element is a negative type liquid crystal display element or a positive type liquid crystal display element, it can be used as a liquid crystal display element that appears to be a negative type display element.

Comparative Example 1 A liquid crystal display element manufactured in the same manner as in the example except that no color filter was provided on the light-shielding film in the peripheral area had a frame-like contrast on the inside edge of the display area with a width of about 5 mm. The display quality was poor.

Example 2.3 Liquid crystal display elements were manufactured by YJ in which the area of the color filter on the light-shielding film in the peripheral area of Example 1 was changed to 80% (Example 2) and 60% (Example 3).

Both the liquid crystal display elements of Example 2 and Example 3 had substantially uniform substrate gaps in both the display area and the peripheral area, and were capable of beautiful color display. The uniformity of the substrate gap was slightly lower than that of No. 2 liquid crystal display element.

Example 4 Instead of the light-shielding film of Example 1, a light-shielding film with a thickness of about 1.2 μm was formed by a dyeing method, and the color filter was also a color filter with a thickness of about 1.8 μm by a dyeing method. A light shielding film and color filter were formed as shown in the figure.

This negative type liquid crystal display element has a color filter and a light-shielding film formed in the same pattern (same plane N) in the display area and the peripheral area, so the gap between the substrates is almost uniform in both the display area and the peripheral area. , beautiful color display was possible.

Example 5 Using the same light shielding film and color filter as Example 4,
As shown in Figure 3, a light shielding film is formed on the entire peripheral area,
A color filter was formed partially (approximately 15% of the area of the color filter in the display section).

This negative type liquid crystal display element has a color filter partially formed on the light-shielding film in the peripheral area, so the gap between the substrates is almost uniform in both the display area and the peripheral area, making it possible to display beautiful colors. Ta.

Note that in this type of liquid crystal display element, as in the liquid crystal display element of Example 1, the area other than the pixel portion is covered with a light-shielding film. Any of these liquid crystal display elements can be used as an apparently negative-type liquid crystal display element.

Example 6 ITO was deposited on a glass substrate in a pattern as shown in Figure 1.
By coating and buttering, a group of 960 striped column electrodes was formed, and the entire surface was coated with SiO.
, -TiO, to a thickness of 300 nm, a thin Cr light-shielding film to a thickness of 1100 nm, then a thick film color filter of RGBa color 2.0 μm thick by dyeing method, and further on top of this. Polyimide with a thickness of about 70 nm fl! Jl, rub this to form an alignment film,
This was used as a column electrode substrate.

240 striped row electrode groups are formed on a glass substrate so as to be perpendicular to the first column electrode group, and Sing-
A TiOs insulating film is formed to a thickness of 300 nm, a polyimide film is laminated to a thickness of about 70 nm, and the alignment film is formed by rubbing so that when the cell is formed by combining this with the column electrodes, the twist angle of the liquid crystal molecules is 240''. was formed to form a row electrode substrate.

These column electrode substrates and row electrode substrates were assembled in the same manner as in the example to produce a dot matrix liquid crystal cell, and the same interference liquid crystal cell as in Example 1 was laminated thereon, and a pair of polarizing plates were placed on both sides. A negative type liquid crystal display element was manufactured.

In this liquid crystal display element, the gap between the substrates was made much more uniform compared to Comparative Example 1, but because the color filter and the light-shielding film were on the electrodes, the surface unevenness was larger than in Example 1. Compared to Example 1, the uniformity of the substrate gap was slightly inferior.

In addition, although a beautiful color display was possible, due to the presence of thick color filters on the electrodes, the effective voltage applied to the liquid crystal layer varied, and the contrast ratio was lower than in Example 1. It was low, and its beauty was somewhat low.

[Effects of the Invention] As explained above, according to the present invention, the gap between the substrates can be easily formed uniformly, and beautiful color display can be achieved.

In particular, the effect is great when applied to super-twist liquid crystal display elements, which have advantages such as time-division display characteristics, wide viewing angles, and high contrast ratios, but which strongly require uniform substrate gap. Moreover, the effect is great when similarly applied to a ferroelectric liquid crystal display element.

Furthermore, if the configurations shown in FIGS. 1 and 2 are adopted, the color filter can be formed using the same mask or plate for both the display area and the peripheral area, resulting in good productivity.

The present invention can be applied in various ways to known liquid crystal display elements within a range that does not impair the effects of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the pattern of the light shielding film and color filter near the boundary between the display area and the peripheral area in an example in which a thin light shielding film and a thick color filter are provided on the inner surface of the cell. FIGS. 2 and 3 are plan views showing patterns of the light shielding film and color filter near the boundary between the display section and the peripheral area in an example in which a thick light shielding film and a thick color filter are provided on the inner surface of the cell. . FIG. 4 is a cross-sectional view of a substrate provided with a light shielding film and a color filter. Display section = 1.11.21 Pixel section: 2.12, 22 Color filter: 3.7, 13.17.23.27
Shading@:4.6.14.16.24.26
Peripheral area: 5.15.25 Substrate: 8 Planarization layer: 9 Electrode = 10 Figure 1 Figure 2 Figure 14: Light shielding film ■3: Color filter Figure 3 Figure 4 Figure 7: Color filter

Claims (5)

[Claims] (1) In a color liquid crystal display element in which a light-shielding film and a color filter are provided on the inner surface of the cell, the light-shielding film and color filter are also provided on the outer periphery of the display part where the electrode groups face each other to display images. A color liquid crystal display element featuring: (2) In a color liquid crystal display element in which a thin light-shielding film and a thick color filter are provided on the inner surface of the cell, in the display section where the electrode groups face each other to display images, a color filter is provided in the pixel portion, and the pixel A light-shielding film is provided in between, and a light-shielding film that is the same as the light-shielding film provided between the pixels of the display part is provided on the entire surface of the outer peripheral area of the display part, and a color filter that is the same as that of the pixel part of the display part is provided on the entire surface. A color liquid crystal display element comprising a color filter whose area is 50 to 100% of the area of a color filter in a pixel portion of a display section. (3) In a color liquid crystal display element in which a thick light-shielding film and a thick color filter are provided on the inner surface of the cell, in the display section where the electrode groups face each other to display images, a color filter is provided in the pixel portion and A color liquid crystal display element characterized in that a light-shielding film is provided between pixels, and the same light-shielding film with the same pattern as the display part and the same color filter are also provided on the outer peripheral part of the display part. (4) In a color liquid crystal display element in which a thick light-shielding film and a thick color filter are provided on the inner surface of the cell, in the display section where the electrode groups face each other to display images, a color filter is provided in the pixel portion. A light-shielding film is provided between the pixels, and a light-shielding film that is the same as the light-shielding film provided between the pixels of the display part is provided on the entire surface of the outer peripheral area of the display part, as well as a color filter that is the same as the color filter of the pixel part of the display part. A color liquid crystal display element, characterized in that it is provided with a color filter whose area is 5 to 50% of the area of the color filter in the pixel portion of the display section. (5) In the color liquid crystal display element according to any one of claims 1 to 4, the liquid crystal display element has a twist angle of 160
300°, and has a structure in which birefringence compensating means for compensating for elliptical polarization caused by this liquid crystal layer is laminated thereon.