JP2901063B2 - Color liquid crystal display device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a color liquid crystal display element suitable for high-density color display.

[Related Art] In recent years, a color liquid crystal display device in which a light-shielding film and a color filter are provided on the inner surface of the liquid crystal display device has been receiving attention.

One of these is the TFT that has been put to practical use in LCD TVs and other devices.
There is an active matrix liquid crystal display element in which an active matrix element such as an MIM or an MIM is provided for each pixel.

In the case of this active matrix liquid crystal display device, since each pixel performs static driving or a driving equivalent thereto, control of the gap between the liquid crystal layers is not so strictly required.

However, such an active matrix liquid crystal display element is difficult to increase in size and is suitable for a small portable television or the like, but is not suitable for a display such as a personal computer or a word processor which requires a large and high-density display. It was difficult to apply.

On the other hand, these displays may use a twisted nematic (TN) type dot matrix liquid crystal display element that performs dynamic driving without using a 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 a large-sized and high-density display device can be easily manufactured, there is a problem that display quality is deteriorated.

That is, in the case of a display such as 640 × 400 dots commonly used in a personal computer or the like, the drive duty number is 1/200.
It also becomes a duty, and it is difficult to obtain only an extremely poor contrast ratio at an extremely narrow viewing angle. For this reason, even if an attempt is made to perform color display, at most eight-color display combining RGB is not practical.

In recent years, by increasing the twist angle of liquid crystal molecules between both electrodes,
A super twist liquid crystal display device has been put to practical use as a method of causing a sharp voltage-transmittance change to display a high-density dot matrix.

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 yellow-green. A high contrast ratio was obtained only by a combination of specific hues such as dark blue, blue violet and pale yellow.

As described above, the liquid crystal display element cannot perform black-and-white display, and thus has a disadvantage in that multi-color or full-color display cannot be performed in combination with a micro color filter.

On the other hand, for example, a liquid crystal cell having a reverse twist is laminated as a birefringence compensating means on the liquid crystal cell for displaying a dot having a high twist, and the circularly polarized light generated in the liquid crystal cell for displaying a dot is reversely twisted. It has been proposed to compensate by a liquid crystal cell to eliminate the coloration unique to a super twisted liquid crystal display element and to perform a display close to black and white.

For this reason, by using such a birefringence compensating means, a display almost close to white and black can be obtained, and there is a possibility that a color display can be performed using a color filter. In particular, by using a light-shielding film in combination with this color filter and forming both of them in a cell, a color liquid crystal display element having an apparently high contrast ratio without positional displacement can be obtained.

[Problems to be Solved by the Invention] However, a super twisted liquid crystal display device using such a high twist liquid crystal cell and utilizing birefringence utilizes birefringence, so that a slight shift in the thickness of the liquid crystal layer is caused. 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 occurs, the display becomes dirty, and the display quality is significantly reduced. .

For this reason, there has been a demand for a color liquid crystal display element which can easily maintain a uniform substrate gap when displaying a large area and has high display quality.

[Means for Solving the Problems] The present invention has been made to solve the above-mentioned problems, and a pixel is configured by providing a strip-shaped electrode group to face each other, and a light shielding film corresponding to the pixel is provided. In a dot matrix type color liquid crystal display device having a color filter provided on the inner surface of the cell, 96 or more pixels are provided on one side by the electrode group, the twist angle of the liquid crystal layer is 160 to 300 °, and the light shielding film and A color liquid crystal characterized in that a color filter is provided in a frame shape inside a seal and on a peripheral portion outside a display portion for displaying (except for a color filter disposed at a position overlapping with the seal). A display element is provided.

In addition, the light-shielding film of the display portion and the light-shielding film of the peripheral portion are thin film light-shielding films, and the color filter of the display portion and the color filter of the peripheral portion are thicker color filters than the light-shielding film. A display element is provided.

In addition, the present invention provides the above-mentioned color liquid crystal display device in which the light-shielding film and the color filter in the peripheral portion are formed in the same pattern as the display portion.

Further, a light-shielding film that is the same as the light-shielding film provided between the pixels of the display portion is provided on the entire peripheral portion, and the area of the color filter made of the same material as the color filter of the display portion is 50 to 50% of the area of the color filter of the display portion. The above-mentioned color liquid crystal display device provided with a 100% peripheral color filter is provided.

Further, the present invention provides the above-mentioned color liquid crystal display element in which a peripheral portion has a width of several mm to twenty and several mm.

Further, the present invention provides the above-mentioned color liquid crystal display device, which is provided with a structure in which birefringence compensating means for compensating for elliptical polarization due to a liquid crystal layer is further laminated.

In the present invention, a color filter and a light shielding film are provided on the inner surface of the substrate of the liquid crystal display element. By changing the configuration of the color filter and the light-shielding film provided in the peripheral part other than the display part according to the thickness of the color filter and the light-shielding film provided in the display unit, the thickness of the liquid crystal layer of the entire cell can be kept more uniform. it can.

The liquid crystal display element used in the present invention is basically a liquid crystal display element having a structure in which a liquid crystal material such as a nematic liquid crystal or a smectic liquid crystal is sealed between a pair of substrates on which alignment treatment is performed and electrodes are provided. Further, a color filter and a light shielding film are provided on the inner surface of the cell.

Specifically, a cell is formed by arranging a band-shaped row electrode group provided on one substrate and a band-shaped column electrode group provided on the other substrate so as to be orthogonal to the group. This is a dot matrix liquid crystal display device in which a liquid crystal material is sealed between the electrodes.

The liquid crystal display element used in the present invention is a super-twisted liquid crystal display element in which uniformity of the thickness of a liquid crystal layer is required. When applied to a super twist liquid crystal display element, the effect is large.

This black-and-white super twisted liquid crystal display element is a normal super twisted liquid crystal cell, that is, a display liquid crystal cell in which a liquid crystal layer having a liquid crystal twist angle of 160 to 300 ° is sandwiched between substrates with electrodes. The same twist angle or 60 from the twist angle
A liquid crystal cell for interference in which a liquid crystal layer shifted by 120 ° is sandwiched, or a liquid crystal cell in which birefringence compensating means composed of a birefringent plate capable of compensating for birefringence similar to this is laminated can be used. A pair of polarizing plates is arranged outside the liquid crystal cell for display and the birefringence compensator. In this case, the twist angle, the orientation direction, the polarization axis direction, and the like may be appropriately adjusted so that the display is close to black and white.

A black-and-white super-twisted liquid crystal display device having such a birefringence compensator laminated thereon compensates for the elliptical polarization that has passed through the display liquid crystal cell by the birefringence compensator, and can provide almost black-and-white display without a color filter. can get.

In the present invention, both the color filter and the light shielding film are provided on the inner surface of the liquid crystal cell for display. As the color filter, a thick film color filter having a thickness of 1 to several μm, such as a color dyeing method, a color ink printing method, a photo-etching method using a photocurable color ink, and an electrodeposition method, can be used.

As the light-shielding film, a black film dyeing method, a black ink printing method, a photo-etching method using a photocurable black ink, a thick film light-shielding film having a thickness of 0.8 to several μm such as an electrodeposition method, or nickel plating, chromium vapor deposition, etc. 0.5μm thick metal thin film
Both of the following thin light-shielding films can be used.

The color filter and the light-shielding film may be provided between the substrate and the electrode, or may be provided between the electrode and the alignment film, one under the electrode and the other over the electrode. May be provided.

In the present invention, such a light-shielding film and a color filter are provided on a display portion whose electrodes are opposed to each other to perform display, and a light-shielding film is also provided on a peripheral portion outside the display portion and inside a seal. And a color filter are provided in a frame shape around the display section.

In the present invention, the pixels are formed with electrodes facing each other. In the dot matrix type liquid crystal display device used in the present invention,
A pixel overlaps a band-shaped row electrode group and a band-shaped column electrode group orthogonal to the band-shaped row electrode group.

In the color liquid crystal display device of the present invention, in order to sufficiently cover the pixel portion with the color filter in the pixel portion of the display portion, the color filter pattern is made larger than the pattern of the opening portion of the light shielding film, and The periphery of the filter is made to overlap the light-shielding film between the pixels. For this reason, in the display portion, a portion where the color filter and the light shielding film overlap is formed.

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

On the other hand, when only the light-shielding film is formed in the peripheral portion, the thickness of the peripheral portion is smaller than that in the display portion, and it is difficult to uniformly control the substrate gap over the entire surface of the cell. However, by adopting the structure of the present invention, the film thickness of the peripheral portion can be made substantially equal to that of the display portion, so that it becomes easy to uniformly control the substrate gap 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,
It can also be used for 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 is deteriorated. Therefore, it is preferable to provide a color filter and a light-shielding film below the electrode.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

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

In this figure, only the upper left corner of the color liquid crystal display device is shown in an enlarged manner for easy understanding, and the same applies to the upper right corner, lower left corner, and lower right corner of an actual color liquid crystal display device. And a peripheral portion is formed around the display portion. The same applies to other examples below, and only the upper left corner is enlarged in the figure. The peripheral light-shielding film and the color filter are provided in a frame shape and surround the display unit.

In this figure, in a display section 1 in which the electrodes are opposed to each other and a display is provided, a color filter 3 is provided in the pixel portion 2 and a light shielding film 4 is provided between pixels, and a peripheral portion 5 outside the display section is provided. Is provided with a light-shielding film 6 which is the same as the light-shielding film provided between the pixels of the display section, and has the same color filter as the color filter 3 of the pixel section of the display section and the area of the color filter 3 of the pixel section of the display section. The color filter 7, which is 50 to 100% of the color filter, is provided.

In such a color liquid crystal display element, as shown in a sectional view of FIG. 4, in the pixel portion 2 of the display portion of the substrate 8, the pixel portion is sufficiently covered with the color filter 3 so that the light shielding film 4 The pattern of the color filter 3 is made larger than the pattern of the opening so that the periphery of the color filter 3 overlaps the light-shielding film between pixels. For this reason, in the display section, a portion where the color filter 3 and the light shielding film 4 overlap is formed. Reference numeral 8 denotes a substrate, 9 denotes a flattening layer formed on the color filter 3 and the light-shielding film 4, and 10 denotes an electrode further formed thereon.

In the present invention, a light-shielding film 6 which is the same as a light-shielding film provided between pixels of the display unit is provided on the entire outer peripheral portion 5 of the display unit, and the same color filter as the color filter of the pixel portion of the display unit is provided. The color filter 7 whose area is 50 to 100% of the area of the color filter 3 in the pixel portion of the display section is provided.

As a result, the color filter 7 and the light-shielding film 6 are partially laminated in the peripheral portion, similarly to the display portion, and uniform gap control can be easily performed when a cell is formed by disposing a spacer on the inner surface of the cell. Can be.

In the case of a color liquid crystal display device in which a thin light-shielding film and a color filter having a film thickness are provided on the inner surface of the cell as described above, the light-shielding film 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 1/5 of the thickness of the color filter.
In this case, the area of the color filter 7 in the peripheral portion may be the same as the area of the color filter 3 in the pixel portion. It can also be used as a part, and only one needs to be provided, resulting in good productivity.

Although only a small number of pixels are shown in the display section in this figure, the present invention is applied to a color liquid crystal display element having 96 or more pixels on one side. A necessary number of pixels, such as dots or 1920 × 640 dots, may be provided.

Also, in the peripheral part, only one pixel on the upper side and three pixels on the left side (one set when viewed as one set of three colors) are described as the peripheral part. May be appropriately determined according to the width of the peripheral portion. Actually, it is often from about several mm to about twenty and several mm.

Further, it is preferable to provide an electrode in a portion corresponding to the pixel in the peripheral portion in the same manner as the display portion, because a difference in thickness between the display portion and the peripheral portion is further reduced.

About these points, it is the same also in the case of the following other examples.

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

In this figure, in a display unit 11 in which the electrode group faces each other, a pixel portion 12 has a color filter.
A light-shielding film is provided between the pixels and a pixel, and a light-shielding film having the same pattern as that of the display portion and a color filter are also provided in a peripheral portion outside the display portion.

In this example as well, as in the example of FIG. 1, in order to sufficiently cover the pixel portion with the color filter 13 in the pixel portion 12 of the display unit, the pattern of the color filter 13 is more than the pattern of the opening of the light shielding film 14. Is increased so that the periphery of the color filter 13 overlaps the light-shielding film between the pixels. For this reason, in the display section, a portion where the color filter 13 and the light shielding film 14 overlap is formed.

In the present invention, a light-shielding film 16 that is the same as the light-shielding film 14 provided between the pixels of the display unit and a color filter 17 that is the same as the color filter 13 of the pixel portion of the display unit are also provided at the peripheral portion 15 outside the display unit. Provide in the same pattern.

Thereby, also in the peripheral portion, the color filter 17 and the light shielding film 16 are arranged similarly to the display portion,
Even if both are thick films and partially overlap each other, the display portion and the peripheral portion have the same structure, and uniform gap control can be easily performed when the cells are formed by disposing the spacers on the inner surfaces of the cells.

Also in this case, the pattern of the color filter 17 and the light shielding film 16 in the peripheral portion is
In addition, since the pattern and the pattern of the light-shielding film 14 may be the same, a mask, a plate, and the like for forming a color filter can also be used for the peripheral portion and the display portion, and only one is required, and the productivity is good.

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

In this figure, in a display section 21 in which the electrode groups face each other, a pixel section 22 has a color filter.
23 and a light-shielding film 24 between pixels, and a light-shielding film 26, which is the same as the light-shielding film provided between the pixels of the display portion, is provided on the entire outer peripheral portion 25 of the display portion. A color filter 27 having the same color filter as the color filter 23 and having an area of 5 to 50% of the area of the color filter 23 in the pixel portion of the display unit is provided.

Also in this example, as in the example of FIG. 1, in order to sufficiently cover the pixel portion in the pixel portion 22 of the display unit with the color filter 23, the pattern of the color filter 23 is smaller than the pattern of the opening of the light shielding film 24. Is increased so that the periphery of the color filter 23 overlaps the light-shielding film between the pixels. For this reason, in the display portion, a portion where the color filter 23 and the light shielding film 24 overlap is formed.

In the present invention, the same light-shielding film 26 as the light-shielding film provided between the pixels of the display unit is provided on the entire outer peripheral portion 25 of the display unit, and the same color filter as the color filter of the pixel portion of the display unit is provided. Then, a color filter 27 whose area is 5 to 50% of the area of the color filter 23 in the pixel portion of the display unit is provided.

In this example, since both the color filter and the light-shielding film are thick films, the color filter 27 and the light-shielding film 26 are stacked in the peripheral portion in the same pattern as the display unit, as in the example of FIG. If this occurs, the thick film becomes extremely thick, and it is difficult to keep the substrate gap of the display unit uniform over the entire surface.

Therefore, as described above, the area of the color filter 27 laminated on the light-shielding film in the peripheral portion is corrected to 5 to 50% of the area of the color filter 23 in the pixel portion of the display portion, thereby correcting the inner surface of the cell. When a cell is formed by arranging a spacer in the cell, uniform gap control can be easily performed.

In this way, the peripheral color filters may have the same pattern arrangement assuming that the pixels are similarly arranged in the peripheral portion. As described above, in the case where the pattern of the color filter of the peripheral portion is the same as the pattern of the color filter of the display portion, the mask, plate, etc. for forming the color filter of the display portion are used as they are, and the color filter of the display portion is used. Since they can be formed in the same manner, productivity is good.

When the area of the color filter in the peripheral portion is changed with respect to the area of the color filter in the display portion, it is assumed that the pixels are arranged in the same manner in the peripheral portion, and that the pixels are arranged at the same pitch as the pixel pitch of the display portion. Alternatively, when the area is small as in the example of FIG. 3, the pitch may be wider than the pixel pitch of the display unit to form the color filter.

The present invention is intended to obtain a beautiful color display with a super-twisted liquid crystal display device in which control of the substrate gap is very strictly required.

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

Electrodes are formed on this substrate, and a liquid crystal is turned on / off by applying a voltage between desired electrodes to perform display.
As this electrode, a transparent electrode such as ITO (In ₂ O ₃ —SnO ₂ ), SnO _{2 and the} like, and Al, Cr,
A low resistance lead such as Ti can be used, and desired patterning is performed. As a typical example of this, there is a dot matrix liquid crystal display element in which a large number of matrix-shaped electrode groups are formed, and 640 stripe-shaped electrodes are formed on one substrate and orthogonal to the other substrate. Thus, 400 stripe-shaped electrodes are formed, and a display such as 640 × 400 dots is performed.

For the treatment for aligning the liquid crystal molecules, a known rubbing method, an oblique deposition method, or the like can be used.
After forming a film of an inorganic material such as SiO ₂ , TiO ₂ , Al ₂ , and O ₃ and / or a film of an organic material such as polyimide and polyamide, alignment treatment may be performed.

In addition, a known configuration for a liquid crystal display element can be employed for the spacer, the sealant, the polarizing plate, the reflecting plate, the lighting means, the driving circuit, and the like.

In addition, the present invention can apply various techniques used in ordinary liquid crystal display elements as long as the effects of the present invention are not impaired.

The color liquid crystal display device of the present invention is suitable as a color display device for a personal computer, a word processor, a workstation, etc., in addition to the above, a color liquid crystal television, a color display fish finder, a color display radar, a color display oscilloscope, a color display It can be used for various applications such as various consumer dot matrix display devices.

[Function] In the present invention, since the color filter and the light-shielding film are partially laminated and formed similarly in both the display portion and the peripheral portion, the cells are formed by arranging the spacer on the inner surface of the cell. In this case, the substrate gap can be made substantially constant in both the display portion and its peripheral portion, and the entire cell surface becomes a substantially uniform substrate gap.

That is, if there is a portion where the color filter and the light shielding film are partially laminated, when the spacers are arranged on the inner surface of the cell, some of the spacers will be distributed also in this laminated portion, and this portion will be the substrate. It acts to thicken the gap.

Therefore, assuming that only the light-shielding film is provided in the peripheral portion, in the display portion, a portion where the color filter and the light-shielding film overlap each other has a portion that is partially higher than the peripheral portion, and the display portion has Since the substrate gap becomes wider than the substrate gap at the peripheral portion, and a portion where the substrate gap gradually changes near the boundary between the display portion and the peripheral portion, color unevenness is likely to occur.

In the present invention, a color filter and a light-shielding film having the same size as the display unit or a specific range are provided also in the peripheral portion. Thereby, also in this peripheral portion, a portion where the color filter and the light shielding film in the display portion overlap with almost the same area as the overlapping portion is formed, and when the spacers are sprayed, the gap between the substrate in the peripheral portion and the display portion is reduced. And the substrate gap is substantially equal and uniform.

Example Next, an example of the present invention will be described in detail with reference to the drawings.

Example 1 As shown in FIG. 1, a thin-film light-shielding film of Cr was formed on a glass substrate to a thickness of 100 nm, and a portion corresponding to a pixel of an electrode portion was subjected to an RGB3 by a dyeing method so that the peripheral portion overlaps the light-shielding film. A thick color filter having a color thickness of 2.0 μm was formed, and an overcoat film (flattening layer) made of polyimide was formed thereon.

A polyimide overcoat film was provided on the color filter and the light-shielding film as described above to planarize the surface, but it was difficult to completely planarize the surface. However, due to the overcoat film, the fine irregularities on the color filter are almost flattened, and the large irregularities around the pixel due to the overlap between the color filter and the light-shielding film are significantly improved compared to the case without the overcoat film. Was.

Thereafter, by patterning by coating the ITO thereon, to form a 960 striped column electrode group, further the insulation film of SiO ₂ -TiO ₂ was formed on 100nm thick on the entire surface, the polyimide on the Were stacked to a thickness of about 70 nm, and this was rubbed to form an alignment film, thereby forming a column electrode substrate.

Form a row electrode group of 240 stripes on a glass substrate so as to be orthogonal to the column electrode group, and have a thickness of 300 nm over the entire surface.
SiO ₂ -TiO ₂ insulation film is formed, a thickness of 70nm to polyimide
When this was combined with the column electrode substrate to form a cell, rubbing was performed so that the twist angle of liquid crystal molecules was 240 ° to form an alignment film, thereby obtaining a row electrode substrate.

In these substrates, the peripheral parts other than the display part also
The same electrode as the electrode provided in the display portion was formed in a stripe shape.

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

In addition, polyimide is laminated on a glass substrate to a thickness of about 70 nm, and two substrates having an alignment film formed by rubbing the polyimide are prepared. The twist direction of the liquid crystal molecules is opposite to that of the dot matrix liquid crystal cell, and the twist angle of the liquid crystal molecules is 240. Arrange so that it becomes ゜,
A cell was formed by sealing around the periphery, and a nematic liquid crystal was injected to produce a liquid crystal cell for interference.

The dot matrix liquid crystal cell and the interference liquid crystal cell were stacked, and a pair of polarizing plates was disposed on both sides to manufacture a negative type liquid crystal display device.

In this liquid crystal display element, a color filter and a light-shielding film are formed in the same pattern (the same area) in the display portion and the peripheral portion, so that the substrate gap is almost uniform in both the display portion and the peripheral portion, and beautiful color display is possible. Met.

In this type of liquid crystal display device, a liquid crystal display device of a positive type display may be obtained by appropriately adjusting the relationship between the refractive index anisotropy (Δn) of the liquid crystal material, the orientation direction and the polarization axis, etc. Since the area other than the pixels is covered with a light-shielding film, a voltage is applied to a place where black is desired to be driven, contrary to the driving of a normal negative-type 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 an apparent negative type liquid crystal display element.

Comparative Example 1 A liquid crystal display device manufactured in the same manner as in Example 1 except that no color filter was
The contrast of the portion about 5 mm wide inside the edge of the display portion was reduced like a picture frame, and the display quality was poor.

Examples 2 and 3 A liquid crystal display device was manufactured in which the area of the color filter on the light-shielding film in the peripheral portion of Example 1 was 80% (Example 2) and 60% (Example 3).

In both the liquid crystal display elements of Examples 2 and 3, the gap between the substrates was substantially uniform in both the display portion and the peripheral portion, and beautiful color display was possible. The uniformity of the substrate gap was slightly lower than that of the liquid crystal display element No. 2.

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

In the negative type liquid crystal display element, the color filter and the light shielding film are formed in the same pattern (the same area) in the display portion and the peripheral portion, so that the substrate gap is substantially uniform in both the display portion and the peripheral portion. Beautiful color display was possible.

Example 5 The same light-shielding film and color filter as in Example 4 were used, and a light-shielding film was formed on the entire surface as shown in FIG. (About 15% area) to form a color filter.

In the liquid crystal display element of this negative display, a color filter is partially formed on the light-shielding film in the peripheral portion, so that the substrate gap is substantially uniform in both the display portion and the peripheral portion, and a beautiful color display is possible. Was.

In this type of liquid crystal display device, as in the case of the liquid crystal display device of Example 1, the portions other than the pixel portion are covered with a light-shielding film. In any of the liquid crystal display elements of
It can be used as an apparently negative type liquid crystal display device.

Example 6 ITO was formed on a glass substrate in a pattern as shown in FIG.
The form the 960 striped column electrode group by patterning by coating, SiO ₂ -TiO ₂ further on the entire surface
A 300 nm thick insulating film, a 100 nm thick Cr light-shielding film, and then a 2.0 μm thick RGB color
Was formed, and a polyimide film was further laminated thereon to a thickness of about 70 nm, and this was rubbed to form an alignment film, thereby obtaining a column electrode substrate.

On a glass substrate, 240 stripe-shaped row electrode groups are formed so as to be orthogonal to the column electrode groups, and SiO ₂ -TiO ₂
The insulating film is formed to a thickness of 300 nm, polyimide is laminated to a thickness of about 70 nm, and when this is combined with the column electrode to form a cell, rubbing is performed so that the twist angle of liquid crystal molecules is 240 ° to form an alignment film. It was formed into a row electrode substrate.

The column electrode substrate and the row electrode substrate were assembled in the same manner as in Example 1 to produce a dot matrix liquid crystal cell, on which the same interference liquid crystal cell as in Example 1 was laminated, and a pair of polarizing plates was arranged on both sides. Thus, a liquid crystal display element of a negative type display was manufactured.

In this liquid crystal display element, the gap between the substrates was considerably uniform as compared with Comparative Example 1, but since the color filter and the light shielding film were on the electrodes, the unevenness of the surface was larger than that in Example 1, The uniformity of the substrate gap was slightly inferior to Example 1. Although a beautiful color display was possible, since a thick color filter was present on the electrode, the effective voltage substantially applied to the liquid crystal layer varied, and the contrast ratio was lower than that in Example 1. It was low and the beauty was rather low.

[Effects of the Invention] As described above, according to the present invention, uniform substrate gaps can be easily formed, and beautiful color display can be achieved.

In particular, when the present invention is applied to a super-twisted liquid crystal display element which has advantages such as time-division display characteristics, a wide viewing angle, a high contrast ratio, and the like, and in which uniformity of a substrate gap is strongly required, the effect is large. Also, by applying the present invention to a ferroelectric liquid crystal display device, the effect is large.

1 and 2, color filters can be formed with the same mask and plate in both the display portion and the peripheral portion, so that productivity is high.

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

[Brief description of the drawings]

FIG. 1 is a plan view showing a pattern of a light-shielding film and a color filter near a boundary between a display portion and a peripheral portion in an example in which a thin light-shielding film and a thick-film color filter are provided on the inner surface of a cell. 2 and 3 are plan views showing patterns of a light-shielding film and a color filter near a boundary between a display portion and a peripheral portion in an example in which a thick light-shielding film and a thick-film color filter are provided on the inner surface of a cell. . FIG. 4 is a sectional view of a substrate provided with a light shielding film and a color filter. Display: 1, 11, 21 Pixels: 2, 12, 22 Color filters: 3, 7, 13, 17, 23, 27 Light-shielding films: 4, 6, 14, 16, 24, 26 Peripherals: 5, 15 , 25 substrate: 8 planarization layer: 9 electrode: 10

Claims (6)

(57) [Claims] 1. A dot matrix type color liquid crystal display device in which a pixel is constituted by providing a band-shaped electrode group facing each other, and a light shielding film and a color filter are provided on the inner surface of the cell corresponding to the pixel. Each side has 96 or more pixels, the twist angle of the liquid crystal layer is 160-300 °, and the light-shielding film and the color filter are framed around the inside of the seal and the outside of the display unit for displaying. A color liquid crystal display element comprising: a color liquid crystal display element (excluding a color filter disposed at a position overlapping a seal). 2. The light-shielding film of the display part and the light-shielding film of the peripheral part are thin light-shielding films, and the color filter of the display part and the color filter of the peripheral part are thick-film color filters thicker than the light-shielding film. A color liquid crystal display device according to claim 1. 3. The color liquid crystal display device according to claim 1, wherein the light-shielding film and the color filter in the peripheral portion are formed in the same pattern as the display portion. 4. A light-shielding film which is the same as a light-shielding film provided between pixels of the display portion is provided on the entire peripheral portion, and the area of the color filter made of the same material as the color filter of the display portion is equal to the area of the color filter of the display portion. 3. The color liquid crystal display device according to claim 2, further comprising a color filter in a peripheral portion which is 50 to 100% of the color filter. 5. The color liquid crystal display device according to claim 1, wherein the peripheral portion has a width of several mm to twenty and several mm. 6. A structure in which birefringence compensating means for compensating for elliptical polarization due to a liquid crystal layer is further provided.
6. The color liquid crystal display device according to any one of items 1 to 5.