JPH11271757A - Color liquid crystal display device and method of manufacturing the same - Google Patents

Abstract

(57) [Abstract] [Problem] To improve the display quality of a color liquid crystal display device. In a color liquid crystal display element in which a pixel is formed by providing a band-shaped electrode group facing each other, and a light-shielding film and a color filter corresponding to a pixel portion are provided on the inner surface of a cell, the inside of a seal is provided. A light-shielding film 6 and a color filter 7 are provided in a frame shape outside the display unit 1 for performing display (excluding those in which a color filter is arranged at a position overlapping with a seal).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a color liquid crystal display device suitable for high-density color display.

[0002]

2. Description of the 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 a liquid crystal display device has been receiving attention. One of them is an active matrix liquid crystal display element in which an active matrix element such as a TFT or MIM, which is put into practical use in a liquid crystal television or the like, 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, it is difficult to increase the size of such an active matrix liquid crystal display device, and it is suitable for a small portable television or the like. It was difficult to apply to displays.

On the other hand, these displays use a twisted nematic (T.sub.T) which performs dynamic driving without using a conventionally used active matrix element.
An N) type dot matrix liquid crystal display element may be used. In the TN type dot matrix liquid crystal display device, since an active matrix device is not provided for each pixel, a device for large-sized high-density display can be easily manufactured, but there is a problem that display quality is deteriorated.

That is, in the case of a display of 640.times.400 dots usually used in a personal computer or the like, the driving duty number becomes 1/200, and only a very poor contrast ratio can be obtained with a very narrow viewing angle. It is hard to be. For this reason, even if an attempt is made to perform color display, gradation display has hardly become practical due to 8-color display combining RGB.

In recent years, a super-twisted liquid crystal display device has been put into practical use as a method for increasing the twist angle of liquid crystal molecules between both electrodes, causing a sharp change in voltage-transmittance, and performing high-density dot matrix display. Was.

However, this method uses a product Δn · multiplied by the birefringence Δn of the liquid crystal of the liquid crystal display element used and the thickness d of the liquid crystal layer.
The value of d is substantially between 0.8 and 1.2 μm, and a high contrast ratio can be obtained only by a combination of specific hues such as yellow green and dark blue and blue violet and light yellow as display colors. I was As described above, since this liquid crystal display element cannot perform black-and-white display, there is a disadvantage that multi-color or full-color display cannot be performed in combination with a micro color filter.

On the other hand, as a birefringence compensating means, for example, a liquid crystal cell having a reverse twist is laminated on the liquid crystal cell for a high twist dot display, and only circularly polarized light generated in the liquid crystal cell for the dot display is converted into a liquid crystal cell. It has been proposed to compensate by a liquid crystal cell having a reverse twist so as to eliminate coloring peculiar 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 substantially similar 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 displacement is obtained.

[0010]

However, the super twisted liquid crystal display device using such a high twist liquid crystal cell and utilizing the birefringence utilizes the birefringence, so that the thickness of the liquid crystal layer is slightly shifted. If the thickness of the liquid crystal layer, which is the gap between the substrates, is not kept very uniform, color unevenness occurs, the display becomes dirty, and the display quality deteriorates remarkably. 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.

[0011]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a pixel is constituted by providing a band-shaped electrode group opposed thereto, and a light shielding film corresponding to the pixel is provided. Matrix color liquid crystal display device in which a color filter is provided on the inner surface of a cell, 96 or more pixels are provided on one side by the electrode group, and the light-shielding film and the color filter are provided inside the seal and display is performed. A color liquid crystal display element characterized by being provided in a frame shape around a peripheral part outside the part (excluding a color filter disposed at a position overlapping with a seal). Further, the light-shielding film of the display portion and the light-shielding film of the peripheral portion are thin light-shielding films,
The color filter on the display and the color filter on the periphery
The present invention provides the above color liquid crystal display element, which is a color filter having a thicker film than a light shielding film.

In a preferred embodiment of the above-mentioned color liquid crystal display device, the light-shielding film and the color filters in the peripheral portion are formed in the same pattern as the display portion. In another preferred embodiment of the above-described color liquid crystal display element, a light-shielding film that is the same as a light-shielding film provided between pixels of a display portion is provided on the entire peripheral portion, and a color filter made of the same material as the color filter of the display portion is provided. A peripheral color filter whose area is 50 to 100% of the area of the color filter of the display portion is provided. In still another preferred embodiment of the above-mentioned color liquid crystal display element, the peripheral portion is several mm to twenty and several m.
m.

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 device. 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 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 an alignment process is performed and electrodes are provided. An element in which a color filter and a light-shielding film are provided on the inner surface of the cell.

Specifically, a cell array 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 thereto. And 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 a uniform thickness of a liquid crystal layer. When the present invention is applied to a black-and-white super-twisted liquid crystal display device using a birefringence compensating means for displaying black and white without a color filter, the effect is large.

The black-and-white supertwisted liquid crystal display element is a conventional supertwisted 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. A liquid crystal cell for interference in which a liquid crystal layer which is reversely twisted to the liquid crystal cell for display and has the same degree of twist or a deviation of 60 to 120 ° from the twist angle is sandwiched or birefringence compensation similar to this is possible. What laminated | stacked the birefringence compensation means which consists of a birefringent plate 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.

The black-and-white super-twisted liquid crystal display device on which such birefringence compensating means is laminated, compensates for the elliptical polarization which has passed through the display liquid crystal cell by the birefringence compensating means, and is substantially black-and-white when no color filter is provided. Is obtained.

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 photoetching method using a photocurable color ink, and an electrodeposition method, can be used.

The light-shielding film may be a thick light-shielding film having a thickness of 0.8 to several μm, such as a black dyeing method, a black ink printing method, a photo-etching method using a photocurable black ink, an electrodeposition method, or the like. Both a thin film light shielding film having a thickness of 0.5 μm or less by a metal thin film such as plating and chromium evaporation 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 under the electrode. You may make it provide on an electrode.

According to 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 also on a peripheral portion outside the display portion and inside a seal. The light shielding film and the 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 element used in the present invention, a portion where a strip-shaped row electrode group and a strip-shaped column electrode group orthogonal to the strip-shaped row electrode group overlap is a pixel.

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

When a thick light-shielding film is used, the thickness of the light-shielding film tends to be non-uniform due to the overlapping of 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, if only the light-shielding film is formed in the peripheral portion, the film thickness in the peripheral portion is smaller than that in the display portion.
It becomes difficult to control the substrate gap uniformly 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 having a color filter and a light-shielding film formed between a substrate and an electrode. Can also be used. This is because if a thick color filter and a light-shielding film are provided on the electrode, 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 thick-film color filter are applied to a color liquid crystal display element provided on the inner surface of a cell. is there.

In this figure, only the upper left corner of the color liquid crystal display device is shown in an enlarged manner for easy understanding. In an actual color liquid crystal display device, the upper right corner portion, the lower left corner portion, and the lower right corner portion are shown. Has a similar configuration, and a peripheral portion is formed around the display section. 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 electrode groups face each other and display is performed, a color filter 3 is provided in the pixel portion 2 and a light shielding film 4 is provided between the pixels.
A light-shielding film 6, which is the same as a light-shielding film provided between the pixels of the display unit, is provided on the entire peripheral portion 5 outside the display unit, and the area is displayed by the same color filter as the color filter 3 of the pixel portion of the display unit. A color filter 7 which is 50 to 100% of the area of the color filter 3 in the pixel portion of the portion is provided.

In such a color liquid crystal display device, FIG.
As shown in the cross-sectional view, in order to sufficiently cover the pixel portion in the pixel portion 2 of the display portion of the substrate 8 with the color filter 3, the pattern of the color filter 3 is more than the pattern of the opening of the light shielding film 4. Enlarge the color filter 3
Is overlapped with the light-shielding film between the 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 9 denotes a flattening layer formed on the color filter 3 and the light shielding film 4, and reference numeral 10 denotes an electrode further formed thereon.

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

As a result, the color filter 7 and the light-shielding film 6 are partially laminated at the peripheral portion, similarly to the display portion. Control is easy.

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

In particular, when the thickness of the light-shielding film is about 1/5 or less of the thickness of the color filter, the area of the color filter 7 in the peripheral portion is the same as the area of the color filter 3 in the pixel portion. Therefore, 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 mask is required, and the productivity is good.

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 device having 96 or more pixels on one side. It is sufficient to provide a necessary number of pixels such as × 96 dots or 1920 × 640 dots.

In the peripheral area, the number of pixels is 1
Although only three pixels on the left side and one pixel on the left side (one set when viewed as one set of three colors) are described as peripheral parts, the number of pixels in this peripheral part may be determined as appropriate according to the width of the peripheral part. Actually, several meters
Since it is often from about m to about twenty and several mm, it may be set to about several pixels to several tens of pixels.

Further, by providing electrodes in a portion corresponding to such peripheral pixels in the same manner as the display portion,
This is preferable because the difference in thickness between the display portion and the peripheral portion is smaller.

These points are the same in 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-film 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. It is.

In this figure, in a display section 11 in which the electrodes are opposed to each other to perform display, a color filter 13 is provided in a pixel portion 12 and a light-shielding film 14 is provided between pixels.
And the same color filter 1 and the same light-shielding film 16 of the same pattern as the display unit are also provided on the peripheral portion 15 outside the display unit.
7 is provided.

In this example as well, as in the example of FIG.
In order to cover the light-shielding film 3, the pattern of the color filter 13 is made larger than the pattern of the opening of the light-shielding film 14, so that the periphery of the color filter 13 overlaps the light-shielding film between 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, the light-shielding film 16 which is the same as the light-shielding film 14 provided between the pixels of the display unit and the color filter 1 of the pixel portion of the display unit are also provided in the peripheral portion 15 outside the display unit.
The same color filters 17 as in No. 3 are 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 in the case of the display section. And the periphery have the same structure,
When a cell is formed by disposing a spacer on the inner surface of the cell, uniform gap control can be easily performed.

Also in this case, the pattern of the color filter 17 and the light shielding film 16 in the peripheral portion may be the same as the pattern of the color filter 13 and the light shielding film 14 in the pixel portion. However, the peripheral part can also be used for the display part, and only one is necessary, and the productivity is good.

FIG. 3 shows 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 color filter 23 is provided in the pixel portion 22 and a light-shielding film 24 is provided between the pixels.
A light-shielding film 26, which is the same as a light-shielding film provided between 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 23 of the pixel unit of the display unit is used. A color filter 27 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.
In order to cover the light-shielding film 3, the pattern of the color filter 23 is made larger than the pattern of the opening of the light-shielding film 24 so that the periphery of the color filter 23 overlaps the light-shielding film between pixels. For this reason, in the display section, 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 color filter of the pixel portion of the display unit is provided. A color filter 27 having the same color filter 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, the color filter 27 and the light-shielding film 26 are formed in the peripheral portion in the same pattern as that of the display portion, as in the example of FIG. When the layers are stacked, the film thickness becomes extremely large, 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 adjusted to 5 to 50% of the area of the color filter 23 in the pixel portion of the display section, thereby correcting this. However, when a spacer is arranged on the inner surface of the cell to form a cell, uniform gap control can be easily performed.

As described above, the color filters in the peripheral portion may have the same pattern arrangement assuming that the pixels are similarly arranged in the peripheral portion. As described above, when the color filter pattern in the peripheral portion is the same as the color filter pattern in the display portion, the mask, plate, etc. for forming the color filter in the display portion are used as they are, and the color filter in the display portion is used. Since it can be formed in the same manner as above, 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 are arranged at the same pitch as the pixel pitch of the display portion. Alternatively, when the area may be small as in the example of FIG. 3, the color filter may be formed with a pitch wider than the pixel pitch of the display unit.

The present invention is suitable for a super-twisted liquid crystal display element or a ferroelectric liquid crystal display element capable of displaying black and white without using a color filter, which requires extremely strict control of the substrate gap. 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. This electrode is usually made of ITO (In ₂ O ₃ −
A transparent electrode such as SnO ₂ ) or SnO ₂ and a low-resistance lead such as Al, Cr, or Ti combined with the transparent electrode can be used, and desired patterning is performed.

As a typical example, 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 , 400 stripe-shaped electrodes are formed so as to be orthogonal to, and display such as 640 × 400 dots is performed.

For the treatment for aligning the liquid crystal molecules, a known rubbing method, oblique evaporation method or the like can be used. If necessary, a film of an inorganic material such as SiO ₂ , TiO ₂ , Al ₂ O _{3 is formed on} the electrode. After forming a film of an organic material such as polyimide and polyamide, alignment treatment may be performed.

In addition, a known structure for a liquid crystal display element can be employed for the spacer, the sealing material, the polarizing plate, the reflecting plate, the illuminating means, the driving circuit, and the like. In addition, the present invention can apply various techniques used in ordinary liquid crystal display elements within a range that does not impair the effects of the present invention.

The color liquid crystal display device of the present invention is suitable as a color display device for personal computers, word processors, workstations and the like. In addition, color liquid crystal televisions, color display fish finder, color display radar, color display oscilloscope. It can be used for various applications such as various dot matrix display devices for consumer use for color display.

[0059]

According to the present invention, the color filter and the light-shielding film are partially laminated and formed similarly in the display portion and the peripheral portion thereof, so that the cell is formed by disposing the spacer on the inner surface of the cell. In this case, the substrate gap can be made substantially constant both in the display portion and in the peripheral portion, so that the entire cell surface has 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 spacer is arranged on the inner surface of the cell, a part of the spacer is distributed also in this laminated portion. The portion acts to thicken the substrate gap.

For this reason, if it is assumed that only the light-shielding film is provided in the peripheral portion, a portion where the color filter and the light-shielding film are overlapped in the display portion has a portion that is partially higher than the peripheral portion, and The substrate gap in the display section is wider than the substrate gap in the peripheral section, and there is a portion where the substrate gap gradually changes near the boundary between the display section and the peripheral section, so that color unevenness is likely to occur.

In the present invention, a color filter and a light-shielding film having the same size as that of the display unit or in 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 each other is formed so as to have almost the same area, 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.

[0063]

EXAMPLE 1 As shown in FIG. 1, a thin light-shielding film made 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 overlapped with the light-shielding film. A thick film color filter having a thickness of 2.0 μm for three colors of RGB was formed by a dyeing method, and an overcoat film (flattening layer) made of polyimide was formed thereon.

Although a polyimide overcoat film was provided on the color filter and the light-shielding film to flatten the surface as described above, it was difficult to completely flatten 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,
This was considerably improved compared to the case without the overcoat film.

Thereafter, 960 stripe-shaped column electrode groups were formed by coating and patterning ITO thereon, and an SiO ₂ —TiO ₂ insulating film was formed on the entire surface to a thickness of 100 nm. A polyimide layer was formed thereon with a thickness of about 70 nm, and this was rubbed to form an alignment film, thereby obtaining a column electrode substrate.

A row electrode group of 240 stripes is formed on a glass substrate so as to be orthogonal to the column electrode group, an insulating film of SiO ₂ —TiO ₂ having a thickness of 300 nm is formed on the entire surface, and a polyimide film is formed. A stack was formed to a thickness of about 70 nm, and 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. Note that, in these substrates, the same electrodes as those provided in the display portion were formed in stripes also in peripheral portions other than the display portion.

The column electrode substrate and the row electrode substrate are arranged such that the twist angle of the liquid crystal molecules is 240 °, sealed around the periphery to form a cell, and nematic liquid crystal is injected to form a dot matrix liquid crystal cell. Manufactured.

A polyimide having a thickness of 7 was formed on a glass substrate.
Two substrates having an alignment film formed by rubbing the laminated layers having a thickness of about 0 nm are prepared, and arranged so that 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 °. To form a cell, 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 laminated, and a pair of polarizing plates was disposed on both sides to produce 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 is obtained by appropriately adjusting the relationship between the refractive index anisotropy (Δn) of the liquid crystal material, the orientation direction, the polarization axis and the like. However, since the area other than the pixel portion is covered with a light-shielding film, by applying a voltage to a place where it is desired to make it black, contrary to the drive of a normal negative display liquid crystal display element, it is driven,
It can be used as a negative type liquid crystal display device.

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 apparently negative type liquid crystal display element.

Example 2 (Comparative Example) A liquid crystal display device manufactured in the same manner as in Example 1 except that no color filter is provided on the light-shielding film in the peripheral portion has a width of about 5 mm inside the edge of the display portion.
The contrast of the portion was reduced like a frame, and the display quality was poor.

"Examples 3 and 4" A liquid crystal display device was manufactured in which the area of the color filter on the light-shielding film at the periphery in Example 1 was 80% (Example 3) and 60% (Example 4). In the liquid crystal display devices of Examples 3 and 4, both the display portion and the peripheral portion had substantially uniform substrate gaps, and beautiful color display was possible.
In the liquid crystal display device of Example 4, the uniformity of the substrate gap was slightly lower than that of the liquid crystal display device of Example 1 or 3.

Example 5 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 also 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 FIG. 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 6 The same light-shielding film and color filter as in Example 5 were used, and a light-shielding film was formed on the entire surface as shown in FIG. (Area of about 15% with respect to the color filter).
In the negative type liquid crystal display device, since a color filter is partially formed on the light shielding film in the peripheral portion, the gap between the substrates in the display portion and the peripheral portion is substantially uniform, and a beautiful color display is possible. Was.

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

Example 7 A 960 stripe-shaped column electrode group was formed by coating and patterning ITO on a glass substrate in the pattern as shown in FIG. 1, and further formed of SiO ₂ —TiO _{2 on the} entire surface. Is formed to a thickness of 300 nm, a thin light-shielding film of Cr is formed to a thickness of 100 nm,
Next, a thick film color filter having a thickness of 2.0 μm for three colors of RGB is formed by a dyeing method, and polyimide is further laminated thereon to a thickness of about 70 nm, and this is rubbed to form an alignment film. did.

A group of 240 striped row electrodes is formed on a glass substrate so as to be orthogonal to the column electrodes. An SiO ₂ —TiO ₂ insulating film is formed to a thickness of 300 nm on the entire surface. When about 70 nm was laminated, and this was combined with the column electrodes to form a cell, when the cells were rubbed so that the twist angle of the liquid crystal molecules was 240 °, an alignment film was formed to obtain a row electrode substrate.

These column electrode substrates and row electrode substrates are described in Example 1.
A dot matrix liquid crystal cell was manufactured in the same manner as described above, and the same interference liquid crystal cell as in Example 1 was laminated thereon, and a pair of polarizing plates was arranged on both surfaces to manufacture a negative type liquid crystal display device.

In this liquid crystal display element, the gap between the substrates was considerably uniform as compared with Example 2, but the color filter and the light-shielding film were on the electrodes. However, 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,
Example 1 where the effective voltage applied to the liquid crystal layer varies substantially.
The contrast ratio was lower and the beauty was slightly lower than.

[0082]

As described above, according to the present invention, the substrate gap can be easily formed uniformly, and a beautiful color display can be realized. 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.

Further, according to the configuration shown in FIGS. 1 and 2, the color filter can be formed using the same mask and plate in the display portion and the peripheral portion, so that the productivity is good. The present invention can be applied to various applications used for known liquid crystal display elements as long as the effects of the present invention are not impaired.

[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 an inner surface of a cell.

FIG. 2 shows 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.

FIG. 3 shows an example in which a thick light-shielding film and a thick-film color filter (the area of the peripheral part is 15% smaller than that of the display part) are provided on the inner surface of the cell; FIG. 4 is a plan view showing a color filter pattern.

FIG. 4 is a cross-sectional view of a substrate provided with a light-shielding film and a color filter.

[Explanation of symbols]

 1, 11, 21: display portion, 2, 12, 22: pixel portion, 3, 7, 13, 17, 23, 27: color filter, 4, 6, 14, 16, 24, 26: light shielding film, 5, 15, 25: peripheral portion, 8: substrate, 9: flattening layer, 10: electrode.

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[Procedure amendment]

[Submission date] February 10, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Name of invention

[Correction method] Change

[Correction contents]

Patent application title: Color liquid crystal display device and method of manufacturing the same

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

[0011]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a pixel is constituted by providing a band-shaped electrode group opposed thereto, and a light shielding film corresponding to the pixel is provided. Matrix color liquid crystal display device in which a color filter is provided on the inner surface of a cell, 96 or more pixels are provided on one side by the electrode group, and the light-shielding film and the color filter are provided inside the seal and display is performed. A color liquid crystal display element characterized by being provided in a frame shape around a peripheral part outside the part (excluding a color filter disposed at a position overlapping with a seal). Further, the light-shielding film of the display portion and the light-shielding film of the peripheral portion are thin light-shielding films,
The color filter on the display and the color filter on the periphery
The present invention provides the above color liquid crystal display element, which is a color filter having a thicker film than a light shielding film. Also, a band-like electrode group
Are arranged facing each other to form a pixel, and light is shielded corresponding to the pixel.
Dot matrix with a film and color filter on the inner surface of the cell
In a method of manufacturing a color liquid crystal display element of the
Band-shaped electrode group arranged so as to have 96 or more pixels on the side
The light-shielding film and color filter inside the seal
Framed around the outside of the display unit
Except where color filters are placed
And the color filters in the peripheral area and the display area are the same.
Color liquid crystal display element characterized by being formed by a mask
And a method for producing the same.

Claims (2)

[Claims] 1. A dot matrix type color liquid crystal display device in which a pixel is formed 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. 96 or more pixels are provided on one side, and a light-shielding film and a color filter are provided in a frame shape on the inner side of the seal and on the outer periphery of the display section for performing display (the color overlaps with the seal. A color liquid crystal display device characterized by the fact that a filter is arranged). 2. 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 thick-film color filters thicker than the light-shielding film. A color liquid crystal display device according to claim 1.