JP2000258784A - Liquid crystal display element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the productivity of a liquid crystal display element by preventing the injecting operation of a liquid crystal composition from being disturbed with an insulating picture frame light shielding layer, and to improve the display quality of the liquid crystal display element by preventing contrast in the vicinity of an injection port from lowering due to a light leakage through the injection port. SOLUTION: In this color liquid crystal display element 10, at the position of an injection port 16a for a sealant 16, a wider gap is formed at the injection port 16a by providing an injection region 31a where no black resin is formed on a picture frame light shielding layer 31 so as to facilitate the injection of a liquid crystal composition 14. Also by forming vertical alignment layers 52a, 52b at the injection region 31a the liquid crystal composition 14 sealed in the injection region 31a is vertically aligned to construct a light shielding region 40 and to prevent a liquid leakage through the injection port 16a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device having an insulating frame light-shielding layer around a display area of an electrode substrate.

[0002]

2. Description of the Related Art An active matrix type liquid crystal display device in which a liquid crystal composition is sealed between an array substrate for controlling pixel electrodes by a thin film transistor (hereinafter abbreviated as TFT) and a counter substrate is conventionally known. , Red (R), green (G), blue (B) insulating colored layers and chromium (Cr)
A color filter composed of a light shielding layer covering the wiring and TFT on the array substrate and a frame light shielding layer covering the periphery of the display area is provided on the counter substrate side. However, when a color filter is provided on the counter substrate side in this way, a margin is required for the light shielding layer and the frame light shielding layer in consideration of misalignment between the array substrate and the counter substrate and pitch deviation between the TFT light shielding layer and the TFT. The light-shielding width of the TFT light-shielding layer, the frame light-shielding layer, and the like must be designed to be wide, and the aperture ratio of the liquid crystal display element is reduced. Was.

For this reason, in recent years, liquid crystal display elements in which a color filter is formed on the array substrate side have been put to practical use in order to eliminate a decrease in aperture ratio caused by widening the light shielding width of the light shielding layer and the frame light shielding layer. I have.

[0004]

In the liquid crystal display device for forming a color filter on the array substrate side, a conductive material such as a metal is used as a light shielding film material for a TFT light shielding layer and a frame light shielding layer. It is not possible, and it is necessary to use a material such as an organic resin insulating film having high insulating properties.

[0005] However, the organic resin insulating film or the like has a high insulating property, but has a low light-shielding property as compared with a metal such as chromium (Cr), and must be thick in order to obtain a sufficient light-shielding property. For this reason, when a frame light-shielding layer made of an organic resin insulating film or the like is provided on the periphery of the display area, a sufficient gap for injecting the liquid crystal composition into the injection port portion must be formed because the thickness of the frame light-shielding layer is large. And the operation of injecting the liquid crystal composition is hindered by the frame light-shielding layer, resulting in a problem that the injection efficiency is lowered and the productivity is lowered. On the other hand, if the frame light-shielding layer is not formed at the injection port in order to smoothly inject the liquid crystal composition, the contrast is partially reduced near the injection port due to light leakage from the injection port. There has been a problem that display quality is deteriorated.

Accordingly, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to improve the aperture ratio of a liquid crystal display element and to improve the injection efficiency of a liquid crystal composition without a frame light-shielding layer preventing the injection of the liquid crystal composition. Accordingly, it is an object of the present invention to provide a liquid crystal display element which can improve productivity and prevent light leakage from an injection port to obtain an image with high display quality.

[0007]

According to the present invention, there is provided a liquid crystal display device having a liquid crystal composition sealed in a gap between a pair of substrates arranged opposite to each other, wherein an injection port is provided. A sealant that surrounds the display area in which the liquid crystal composition is sealed and secures the substrate pair, a frame light-shielding layer that shields the periphery of the display area, and the liquid crystal composition that passes through the liquid crystal composition at the injection port position. An injection region formed in the frame light-shielding layer, and a light-shielding region made of a liquid crystal composition that is vertically aligned and interposed between the pair of substrates in the injection region are provided.

According to another aspect of the present invention, there is provided a liquid crystal display device in which a liquid crystal composition is sealed in a gap between a pair of substrates disposed opposite to each other. A sealant surrounding the display area to be fixed and fixing the pair of substrates, a frame light-shielding layer for shielding the periphery of the display area, and a frame light-shielding layer formed to pass the liquid crystal composition at the position of the injection port. And a light-shielding region made of a liquid crystal composition which is interposed in the gap between the pair of substrates and is always applied with a voltage.

According to the present invention, the liquid crystal composition can be smoothly injected from the injection port to improve productivity.
It is intended to improve display quality by preventing light leakage from the injection region.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to a first embodiment shown in FIGS. Reference numeral 10 denotes an active matrix type transmissive color liquid crystal display element,
An array substrate 12 having a TFT 11 and a counter substrate 13 are arranged to face each other, and a twisted nematic (TN) type liquid crystal composition is provided in a predetermined gap in a display area surrounded by a sealant 16 via alignment films 15 a and 15 b. 14 is enclosed. Further, 50 and 51 are polarizing plates arranged in a crossed Nicols state.

The array substrate 12 is made of glass
Silicon oxide (SiO 2) is formed on the substrate 17. _Two) Film and silicon nitride
Undercoating consisting of a two-layer structure of concrete (SiN)
Is provided with a polysilicon layer (p-Si).
And the source region 18 sandwiching the channel region 18a.
b, the semiconductor layer 18 formed with the drain region 18c
The pattern is formed. Oxide silicon covering the semiconductor layer 18
Recon (SiO_Two) On the gate insulating film 20 composed of a film or the like
A scanning line (not shown) is provided in an area corresponding to the channel area 18a.
And a gate electrode 21 integral with the TFT 1
1. Silicon oxide covering the gate electrode 21
(SiO_TwoThe molybdenum film is formed on the interlayer insulating film 22 made of a film.
(Mo) and aluminum (Al)
A drain electrode 23 integrated with a signal line (not shown);
The source electrode 24 is patterned and the gate insulating film 20 and the layer
Semiconductor through a through hole formed in the insulating film 22
Drain region 18c or source region 18b of layer 18
Connect to each.

On these, an inorganic insulating film 26 having a two-layer structure of a silicon oxide (SiO ₂ ) film and silicon nitride (SiN) is formed, and furthermore, a red (R) coloring made of an organic resin insulating film. A layer 27, a green (G) colored layer 28, and a blue (B) colored layer (not shown);
28 are patterned in a stripe pattern. Coloring layer 27,
28 is made of black resin mixed with red (R), green (G), and blue (B) pigments, and is provided by gap holding means for holding the gap between the array substrate 12 and the counter substrate 13 constant. A certain columnar spacer 30 is formed, and a frame-shaped frame light-shielding layer 31 made of a black resin is provided in the sealant application area around the coloring layers 27 and 28 so as to shield the periphery of the display area surrounded by the sealant 16. A color filter 32 is formed.

However, at the position of the injection port 16 a formed in the sealant 16, between the array substrate and the opposing substrate 13,
The black resin of the frame light shielding layer 31 is not formed so as to form a wider gap, and the liquid crystal composition 1 from the injection port 16a is not formed.
An implantation region 31a for smoothly implanting No. 4 is formed. Pixel electrodes 34 made of indium tin oxide (hereinafter referred to as ITO) are pattern-formed in a matrix on the color filter 32 thus formed, and the pixel electrodes 34 are formed on the colored layers 27 and 28. It is connected to the source electrode 24 via the hole.

On the other hand, the counter substrate 13 has a counter electrode 37 made of ITO on a glass substrate 36. Further, an alignment film 15 is provided in a display area of the array substrate 12 and the counter substrate 13.
While a and 15b are formed, vertical alignment films 52a and 52b for forming a light-shielding region 40 in which the liquid crystal composition 14 is always vertically aligned are formed in the injection region 31a. As a result, it is fixed to the sealant 16 and the injection port 16a
The liquid crystal composition 14 in the gap between the array substrate 12 and the counter substrate 13 sealed by the sealing agent 38
15b and the vertical alignment films 52a and 52b. That is, in the injection region 31a, the liquid crystal composition 14 is always oriented in the vertical direction, so that the light-shielding region 40 that performs black display is formed.

The color liquid crystal display device 10 constructed as described above
In the array substrate 12 of FIG.
After forming T11, the gate insulating film 20, the gate electrode 21, the interlayer insulating film 22, the drain electrode 23 and the source electrode 24, the color filter 32 is formed on the array substrate 12 by the following manufacturing method.

That is, a signal line (not shown), a drain electrode 2
3. UV-curable acrylic resin resist CR-200 in which a red pigment is dispersed above the pattern of the source electrode 24
0 (manufactured by Fuji Hunt Technology Co., Ltd.) is applied over the entire surface by a spinner, and a light of 365 nm wavelength is applied at 100 mJ / via a photomask that irradiates light to a portion to be colored red (R).
cm ² was irradiated and developed for 10 seconds in a 1% aqueous solution of potassium hydroxide (KOH), resist CR-2000 for red (R)
Are arranged in a stripe and baked at 230 ° C. for 1 hour to form a red (R) colored layer 27 having a thickness of 2.0 μm.

Similarly, a UV-curable acrylic resin resist CG-2000 (Fuji Hunt Technology Co., Ltd.) in which a green (G) pigment is dispersed by photolithography.
UV-curable acrylic resin resist CB-2000 (Fuji Hunt Technology)
A green (G) colored layer 28 and a blue (B) colored layer (not shown) having a thickness of 2.0 μm are respectively formed by using The layers 27 and 28 are formed in a stripe shape.

Next, a photosensitive black resin CK-2000
(Fuji Hunt Technology Co., Ltd.) is applied using a spinner and dried at 90 ° C. for 10 minutes, and then a photomask having a predetermined pattern shape is used to leave a columnar spacer 30 having a diameter of 20 μm and a frame light shielding layer 31 having a width of 2000 μm. 365 nm
At a wavelength of 300 mJ / cm ² , and then developed with an aqueous alkaline solution having a pH of 11.5.
By baking for 0 minutes, a columnar spacer 30 having a thickness of 5 μm and a frame light-shielding layer 31 having a thickness of 5 μm are pattern-formed. However, in the region corresponding to the injection port 16a of the sealing agent 16 in the frame light-shielding layer 31, the injection region 31a in which the black resin is not formed.
Is formed.

After the color filter 32 is formed, a through hole reaching the source electrode 24 is formed by photo-etching after forming the color filter 32, and a 1500 angstrom film of ITO is formed on the through-hole by sputtering, and a predetermined thickness is formed by photo-etching. Pattern the pixel electrode 34
To form Thus, the pixel electrode 34 is electrically connected to the source electrode 24 via the through hole. Thereafter, a polyimide, AL-1051 (manufactured by Nippon Synthetic Rubber Co., Ltd.), is applied to the display region and the injection region 31a to a thickness of 500 angstroms, an alignment film 15a is formed in the display region, and the polyimide is vertically aligned to the injection region 31a. After forming the film 52a, a rubbing process is performed.

In the counter substrate 13, a glass substrate 36
A counter electrode 37 made of ITO and having a thickness of 1500 angstroms is formed thereon by sputtering. After that, the display area is polyimide AL-1051 (Nippon Synthetic Rubber).
Co., Ltd.) is applied to a thickness of 500 angstroms to form an alignment film 15b. A mixture of the above polyimide and a vertical alignment treatment agent such as a silane-based alignment agent is applied to the injection region 31a to a thickness of 500 angstroms to form a vertical alignment film 52b. Thereafter, the alignment film 15b and the vertical alignment film 52b are rubbed.

Thereafter, an injection port 16a is provided on the frame light-shielding layer 31 on the periphery of the display area of the array substrate 12, and the sealant 16 is formed.
Is printed, and an electrode transfer material (not shown) for applying a voltage from the array substrate 12 to the opposing substrate 13 is sealed with the sealant 1.
6 are formed on peripheral electrode transfer electrodes (not shown), and the array substrate 12 and the opposing substrates 12, 13 are arranged such that the rubbing directions of the alignment films 15a, 15b and the vertical alignment films 52a, 52b are each 90 degrees. Then, the sealant 16 is heated and cured to fix the substrates 12 and 13 to form a liquid crystal cell.

Next, the injection region 3 formed in the injection port 16a of the sealant 16 and the frame light-shielding layer 31 by a reduced pressure injection method or the like.
1a, the liquid crystal composition 14, ZLI-1565
(E. Merck) with a chiral agent. The one added with lwt% is injected. When the liquid crystal composition 14 is injected, an injection region 31 a where the frame light-shielding layer 31 is not formed is formed at the position of the injection port 16 a, and the gap between the injection port 16 a is widened between the array substrate 12 and the counter substrate 13. The liquid crystal composition 14 is smoothly injected from the injection port 16a and the injection region 31a without hindering the injection operation by the frame light-shielding layer 31.

After the injection of the liquid crystal composition 14, the injection port 16a is sealed with a sealing agent 38 made of an ultraviolet curable resin to complete the color liquid crystal display element 10. In the injection region 31a of the color liquid crystal display element 10 thus obtained, a light shielding region 40 made of the liquid crystal composition 14 in which liquid crystal composition molecules are always vertically aligned is sealed. Therefore, in the color liquid crystal display element 10, there is no light leakage from the injection port 16a, no decrease in contrast near the injection port 16a is observed, and uniform and excellent display can be obtained over the entire display area.

With this configuration, even if the injection region 31a in which no black resin is formed in the frame light-shielding layer 31 is formed so as not to hinder the operation of injecting the liquid crystal composition 14 from the injection port 16a, the injection region 31a is formed. The liquid crystal composition 14 to be filled is always vertically aligned using the vertical alignment films 52a and 52b to form the light-shielding region 40.
Light leakage from 6a can be prevented. Accordingly, the operation of injecting the liquid crystal composition 14 of the color liquid crystal display element 10 having sufficient luminance can be performed smoothly, and the productivity can be improved.
The display quality can be improved by preventing light leakage from the inlet 16a and preventing a decrease in contrast.

Next, the present invention will be described with reference to a second embodiment shown in FIGS. In this embodiment, a strip-shaped black resin is formed in the injection region in order to ease the positioning accuracy in applying the vertical alignment film in the injection region and easily obtain the light-shielding region. Since the present embodiment is the same as the above-described embodiment, the same portions are denoted by the same reference numerals and description thereof will be omitted.

That is, on the array substrate 12, the columnar spacers 3
0 and the implantation region 31 at the time of forming the pattern of the frame light shielding layer 31.
A strip-shaped resin 41 having a width of 500 μm is integrally formed with the frame light-shielding layer 31 on a. Then, after forming the pixel electrode 34,
A rubbing process is performed by applying 500 Å of AL-1051 (manufactured by Nippon Synthetic Rubber Co., Ltd.) to the display region and the injection region 31a having the belt-shaped resin 41 to form the alignment film 42a and the vertical alignment film 53a. Thereafter, the array substrate 12 having the band-shaped resin 41 and the opposing substrate 13 are adhered to each other to form a liquid crystal cell.
Inject.

When the liquid crystal composition 14 is injected, the injection region 3
Although the strip-shaped resin 41 is formed in 1a, the liquid crystal composition 14 is smoothly injected without hindering the injection operation due to its narrow width. After the liquid crystal composition 14 is injected, the injection port 16a is sealed with a sealant 38 made of an ultraviolet curable resin to complete the color liquid crystal display element 55. In the color liquid crystal display element 55 thus obtained, as in the first embodiment, the liquid crystal composition 14 in the injection region 31a is always vertically aligned by the vertical alignment films 53a and 52b and the light shielding region 40
Therefore, light leakage at the injection port 16a is not seen, and uniform and good contrast can be obtained over the entire display region.

With this configuration, as in the first embodiment, the operation of injecting the liquid crystal composition 14 is smoothed to improve the productivity, and light leakage from the injection port 16a is prevented to improve the contrast. The display quality can be improved by uniformity. In addition, the band-shaped resin 41 ensures a certain degree of light shielding at the boundary between the display region of the liquid crystal composition 14 sealed between the array substrate 12 and the counter substrate 13 and the light shielding region.
When applying the alignment film 15b and the vertical alignment film 52b on the opposing substrate 13, the application position accuracy at the boundary between the display region and the light shielding region can be relaxed, and the light shielding region 40 can be formed more easily.

Next, the present invention will be described with reference to a third embodiment shown in FIGS. In the present embodiment, an injection region holding means having the same structure as a columnar spacer formed in a display region is provided in an injection region to maintain a constant gap between an array substrate and a counter substrate. Since the present embodiment is the same as the above-described embodiment, the same reference numerals are given to the same portions, and the description thereof will be omitted.

That is, the color filter 32 of the array substrate 12
At the time of formation, one of the red (R) coloring layer 27, the green (G) coloring layer 28, and the blue (B) coloring layer (not shown) causes the injection region 31a to have a diameter of 20 μm × height. A dummy colored layer 47 of 5 μm is formed. Next, black resin CK-200
0 (manufactured by Fuji Hunt Technology Co., Ltd.), the columnar injection region spacer 48 serving as an injection region holding means having a diameter of 20 μm is formed on the dummy coloring layer 47 of the injection region 31a when the pattern of the frame light-shielding layer 31 is formed. At the same time.

After forming the pixel electrode 34, AL-1
A rubbing process is performed by applying 500 Å of the liquid crystal 051 (manufactured by Nippon Synthetic Rubber Co., Ltd.) to the injection region 31a having the display region and the injection region spacer 48 to form the alignment film 43a and the vertical alignment film 54a. A liquid crystal cell is formed by laminating the array substrate 12 having the injection region spacer 48 and the counter substrate 13, and the liquid crystal composition 14 is injected from the injection region 16 a having the injection port 16 a and the injection region spacer 48.

At the time of injecting the liquid crystal composition 14, the injection region 3
Although the injection region spacer 48 is formed in 1a, the injection is smoothly performed without hindering the injection operation. After the liquid crystal composition 14 is injected, the injection port 16a is sealed with a sealant 38 made of an ultraviolet curable resin to complete the color liquid crystal display element 60. Color liquid crystal display element 6 thus obtained
0 indicates that the liquid crystal composition 14 in the injection region 31a is always vertically aligned by the vertical alignment films 54a and 52b to form the light shielding region 40, as in the first embodiment.
No light leakage at a is observed, and uniform and good contrast can be obtained over the entire display area.

With this configuration, as in the first embodiment, the operation of injecting the liquid crystal composition 14 is smoothed to improve the productivity, and light leakage from the injection port 16a is prevented to improve the contrast. The display quality can be improved by uniformity. Further, by providing the implantation region spacer 48, the implantation region 3
The gap between the array substrate 12 and the opposing substrate 13 at the periphery of 1a can be kept uniform, and a good display image without display unevenness can be obtained at the periphery of the injection region 31a, and the display quality can be further improved. Moreover, the implantation region spacer 48 can be easily formed simultaneously with the conventional pattern forming operation of the columnar spacer 30 in the display region only by changing the photomask at the time of pattern formation, and does not cause an increase in the manufacturing process.

Next, the present invention will be described with reference to FIGS.
This will be described with reference to the embodiment. In the present embodiment, a transparent conductive film for constantly applying a DC voltage to the liquid crystal composition is provided in order to display the liquid crystal composition sealed in the injection region in black, and the other components are the same as those in the first embodiment. Therefore, the same portions are denoted by the same reference numerals and description thereof will be omitted.

That is, the color liquid crystal display element 6 of the present embodiment
In the array substrate 62 having the five TFTs 11, the frame light-shielding layer 3 that shields the periphery of the display area surrounded by the sealant 16 having the injection port 16a as in the first embodiment.
After forming the color filter 32 by providing the injection region 31a in 1, when patterning the pixel electrode 34, the ITO film 71a as the voltage application terminal is simultaneously patterned in the injection region 31a. Then, AL-1051 (manufactured by Nippon Synthetic Rubber Co., Ltd.) is provided above the pixel electrode 34 and the ITO film 71a.
Is formed and rubbing treatment is performed.

On the other hand, in the counter substrate 63, when the pattern of the counter electrode 37 is formed in the display region, the injection region 31 is formed.
A pattern is simultaneously formed on the ITO film 71b which is a voltage application terminal. Further, an alignment film 81b made of AL-1051 (manufactured by Nippon Synthetic Rubber Co., Ltd.) is formed above the counter electrode 37 and the ITO film 71b, and rubbed. And array substrate 6
The ITO film 71a on the second side and the ITO film 71 on the opposite substrate 63 side
The ITO films 71a and 71b are wired and connected to a DC power supply (not shown) so that a DC voltage of 5 V (hereinafter abbreviated as DC voltage) is always applied between the ITO films 71a and 71b. As a result, the liquid crystal composition 14 sealed in the injection region 31a is
A light-shielding region 76 that is vertically oriented by applying a DC voltage by 1a and 71b and performs black display is configured.

In this color liquid crystal display element 65,
When the liquid crystal composition 14 is injected after the liquid crystal cell is formed by bonding the array substrate 62 and the counter substrate 63 together, the injection region 31 a
Since the frame light-shielding layer 31 is not formed in the liquid crystal composition 14, the liquid crystal composition 14 is smoothly injected. Thereafter, the injection port 16a is sealed with a sealing agent 38 made of an ultraviolet curable resin to complete the color liquid crystal display element 65. The color liquid crystal display element 65 obtained in this manner is different from the ITO film 71 in the injection region 31a.
Since a DC voltage is always applied between the liquid crystal composition 14a and the liquid crystal composition 14 filled in the injection region 31a, the liquid crystal composition 14 is always vertically oriented to form the light shielding region 76.
No light leakage is observed, and uniform and good contrast can be obtained over the entire display area. When the liquid crystal composition 14 is always in a state where a DC voltage is applied, the liquid crystal composition 14
Causes burn-in, but the black display in the injection region 31a is made darker by this, so that the light shielding performance of the light shielding region 76 is further improved.

With this configuration, as in the first embodiment, the operation of injecting the liquid crystal composition 14 can be performed smoothly, the productivity of the color liquid crystal display element 65 can be improved, and light leakage from the injection port 16a can be achieved. And uniformity of contrast can be achieved to improve display quality. Moreover, the ITO film 71a,
71b can be easily formed simultaneously with the operation of forming the pixel electrode 34 and the counter electrode 37, respectively, and the light-shielding region 76 can be easily obtained without increasing the number of manufacturing steps.

Next, the present invention will be described with reference to FIGS.
This will be described with reference to the embodiment. In the present embodiment, a band-shaped black resin is formed in the injection region to shield alignment disorder generated around the ITO film, and the other parts are the same as those in the fourth embodiment. The reference numerals are used and the description is omitted.

That is, on the array substrate 62, the columnar spacers 3
At the same time as the pattern formation of the frame light-shielding layer 31 and the frame light-shielding layer 31.
1 and integrally formed. Thereafter, the pixel electrode 34 and the IT
An O film 72a is formed, and AL-1051 (manufactured by Nippon Synthetic Rubber Co., Ltd.) is further coated on the ITO film 72a on which the display region and the band-shaped resin 41 are formed by 500 angstroms to form an alignment film 82a. Perform processing. Here, when the DC voltage is constantly applied, the liquid crystal composition 14 sealed in the injection region 31a has a possibility that the alignment may be disturbed around the voltage application portion. Therefore, the band-shaped resin 41 is applied to the liquid crystal composition 14
Is to prevent light leakage due to the disorder of the orientation.

After the liquid crystal cell is formed by laminating the array substrate 62 having such a band-shaped resin 41 and the counter substrate 63, the liquid crystal composition 14 is injected from the injection port 16a and the injection region 31a. Strip resin 41
Is formed, but the liquid crystal composition 14 is smoothly injected without hindering the injection operation because of its narrow width. Thereafter, the injection port 16a is sealed with a sealant 38 made of an ultraviolet curable resin to complete the color liquid crystal display element 70.

In the color liquid crystal display element 70 thus obtained, as in the fourth embodiment, the liquid crystal composition 14 sealed in the injection region 31a is always vertically oriented to form the light shielding region 76. Accordingly, light leakage from the injection port 16a can be prevented, and light leakage due to alignment disorder seen at the boundary between the display region and the injection region 31a can be blocked by the band-shaped resin 41, and light leakage at the injection port 16a is observed. However, uniform and good contrast was obtained over the entire display area.

With this configuration, as in the case of the fourth embodiment, the operation of injecting the liquid crystal composition 14 of the color liquid crystal display element 70 can be performed smoothly, thereby improving the productivity and preventing light leakage from the injection port 16a. Can be reliably prevented, the contrast can be made uniform, and the display quality can be improved.

Next, the present invention will be described with reference to FIGS.
This will be described with reference to the embodiment. In the present embodiment, the position of the injection port formed in the sealant is regulated. Since the other parts are the same as those of the fourth embodiment, the same parts are denoted by the same reference numerals and description thereof will be omitted.

That is, after forming the array substrate 62 and the counter substrate 63 in the same manner as in the fourth embodiment, the alignment films 83a and 83b are respectively applied and rubbed. When the rubbing direction is such that the color liquid crystal display element 75 is viewed from the counter substrate 63 side, as shown in FIG.
19L, the direction of the counter substrate 62 is in the direction of the arrow t.
-An area M indicated by oblique lines in a lower half than the center indicated by -L 'line
Is located on the side having better visual characteristics, so that the array substrate 6
An injection port 16b of the sealant 16 to be printed on the second frame light-shielding layer 31 is formed at any position in a region M indicated by oblique lines in FIG. In accordance with the position of the injection port 16b, an injection region 31b in which the black resin is not formed is provided in the frame light shielding layer 31. Further, in the injection region 31b, ITO films 73a and 73b and an alignment film 83 are formed on the array substrate 62 and the counter substrate 63, respectively.
a and 83b are sequentially formed and rubbed in the directions of arrows s and t, respectively.

Thereafter, the array substrate 62 and the opposing substrate 63
And a liquid crystal cell is formed, and the liquid crystal composition 14 is injected from the injection port 16b and the injection region 31b of the sealant 16. At the time of this injection, the liquid crystal composition 14 is
Smooth injection without disturbing the injection operation.
Further, in the injection region 31b, the liquid crystal composition 14
Since the light-shielding region 77 is configured to be vertically oriented by applying a DC voltage between 3a and 73b, light leakage from the injection port 16b of the color liquid crystal display element 75 is prevented.

With this configuration, the operation of injecting the liquid crystal composition 14 can be smoothly performed as in the fourth embodiment, thereby improving the productivity, and preventing light leakage from the injection port 16b to achieve uniform contrast. And display quality can be improved. Further, since the injection port 16b is formed in a direction having good visual characteristics, even when the color liquid crystal display element 75 is viewed obliquely, the periphery of the injection port 16b does not become white.

Next, the present invention will be described with reference to FIGS.
This will be described with reference to the embodiment. In the present embodiment, an injection region holding means having the same structure as a columnar spacer formed in a display region is provided in an injection region to maintain a constant gap between an array substrate and a counter substrate. Since the present embodiment is the same as the above-described embodiment, the same reference numerals are given to the same portions, and the description thereof will be omitted.

That is, the color filter 32 of the array substrate 62
At the time of formation, one of the red (R) coloring layer 27, the green (G) coloring layer 28, and the blue (B) coloring layer (not shown) causes the injection region 31a to have a diameter of 20 μm × height. A dummy colored layer 47 of 5 μm is formed. Next, black resin CK-200
0 (manufactured by Fuji Hunt Technology Co., Ltd.), the columnar injection region spacer 48 serving as an injection region holding means having a diameter of 20 μm is formed on the dummy coloring layer 47 of the injection region 31a when the pattern of the frame light-shielding layer 31 is formed. At the same time.

Thereafter, the ITO film 74a is formed together with the pixel electrode 34.
And AL-1051 (manufactured by Nippon Synthetic Rubber Co., Ltd.)
Is applied to the display region and the upper part of the ITO film 74a by 500 angstroms to form an alignment film 84a and perform a rubbing process. However, in order to prevent a short circuit with the ITO film 71b on the counter substrate 63 side, I
The TO film 74a is not formed. In order to prevent a short circuit, the ITO film 71b on the counter substrate 63 side facing the injection region spacer 48 may not be partially formed.

Then, the array substrate 62 and the opposing substrate 63 are bonded to each other to form a liquid crystal cell, and the injection region 3 having the injection port 16 a of the sealant 16 and the injection region spacer 48 is formed.
1a without impeding the injection operation of the liquid crystal composition 1
Inject 4 smoothly. Thereafter, the injection port 16a is sealed with a sealing agent 38 made of an ultraviolet curable resin, thereby completing the color liquid crystal display element 80.

In the color liquid crystal display element 80 thus obtained, as in the fourth embodiment, the liquid crystal composition 14 sealed in the injection region 31a is changed by applying a DC voltage between the ITO films 74a and 71b. The light-shielding area 7 which is always vertically oriented
No. 6, light leakage from the injection port 16a is not seen, and uniform and good contrast can be obtained over the entire display area.

With this configuration, as in the case of the fourth embodiment, the operation of injecting the liquid crystal composition 14 can be smoothly performed to improve the productivity, and light leakage from the injection port 16a can be reliably prevented. Uniform contrast can be achieved, and display quality can be improved. Further, the gap between the array substrate 62 and the counter substrate 63 in the implantation region 31a can be uniformly maintained, and the implantation region 3
A good display image without display unevenness can be obtained at the periphery of 1a, and the display quality can be further improved. Further, despite the provision of the implantation region spacer 48, no short circuit occurs between the ITO films 74a and 71b, and the reliability is not impaired.

The present invention is not limited to the above-described embodiment, and can be changed without departing from the spirit of the present invention. For example, if the material of the columnar spacer and the frame light-shielding layer has insulating properties, There is no limitation on the forming method or the layer thickness, and the columnar spacer or the frame light-shielding layer may be formed by laminating colored layers of three primary colors used for the color filter instead of the black resin. The frame light-shielding layers are optional, such as being formed of different materials or manufacturing processes. If necessary, an insulating frame light shielding layer may be provided on the counter substrate side. Further, the shape and size of the means for holding the gap between the substrate pairs or the means for holding the injection region are arbitrary.

A means for vertically orienting the liquid crystal composition in the injection region is arbitrary. For example, a voltage application terminal for applying a voltage to the liquid crystal composition in the injection region is also provided with a transparent conductive film used for a pixel electrode. May be another light-shielding conductive film or the like.

Although the position of the injection port is not limited,
As shown in the sixth embodiment, if the liquid crystal display element is formed in a direction with good visual characteristics in the periphery of the display area, it is possible to prevent the whitening around the injection port regardless of the angle at which the liquid crystal display element is viewed, and to always provide good display quality. Can be obtained. Further, even when the liquid crystal composition is vertically aligned by using the vertical alignment film as in the first to third embodiments, the whitish around the injection port when the liquid crystal display element is viewed obliquely can be reduced. In order to prevent this, the formation position of the injection port may be regulated in a direction with good visual characteristics.

[0057]

As described above, according to the present invention, when a frame light-shielding layer is formed on the periphery of a display region by an insulating member, the liquid crystal composition passes through the frame light-shielding layer at the position of the liquid crystal composition inlet. The liquid crystal composition can be smoothly injected without hindering the injection operation into the frame light-shielding layer by forming the injection region for performing the above operation, and the productivity of the liquid crystal display device can be improved. The liquid crystal composition sealed in the injection region is vertically oriented to form a light-shielding region for black display, thereby preventing light leakage in the vicinity of the injection hole and providing uniform display quality over the entire display region. And a liquid crystal display element having good .

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a color liquid crystal display device according to a first embodiment of the present invention.

FIG. 2 is a partial explanatory view showing a frame light-shielding layer and a sealant of the color liquid crystal display element according to the first embodiment of the present invention.

FIG. 3 is a schematic sectional view of the color liquid crystal display device according to the first embodiment of the present invention, taken along line AA ′ in FIG. 2;

FIG. 4 is a schematic cross-sectional view of the color liquid crystal display device according to the first embodiment of the present invention, taken along line BB ′ in FIG. 2;

FIG. 5 is a partial explanatory view showing a frame light-shielding layer and a sealant of a color liquid crystal display element according to a second embodiment of the present invention.

FIG. 6 is a schematic cross-sectional view of the color liquid crystal display device according to a second embodiment of the present invention, taken along line CC ′ of FIG. 5;

FIG. 7 is a schematic cross-sectional view of the color liquid crystal display device according to a second embodiment of the present invention, taken along line DD ′ of FIG. 5;

FIG. 8 is a partial explanatory view showing a frame light-shielding layer and a sealant of a color liquid crystal display element according to a third embodiment of the present invention.

FIG. 9 is a schematic sectional view of the color liquid crystal display device according to a third embodiment of the present invention, taken along line EE ′ of FIG. 8;

FIG. 10 is a schematic sectional view of the color liquid crystal display device according to a third embodiment of the present invention, taken along line FF ′ of FIG. 8;

FIG. 11 is a schematic sectional view showing a color liquid crystal display device according to a fourth embodiment of the present invention.

FIG. 12 is a partial explanatory view showing a frame light-shielding layer and a sealant of a color liquid crystal display element according to a fourth embodiment of the present invention.

FIG. 13 is a schematic sectional view of the color liquid crystal display device according to a fourth embodiment of the present invention, taken along line GG ′ of FIG. 12;

FIG. 14 is a schematic sectional view of the color liquid crystal display device according to a fourth embodiment of the present invention, taken along line HH ′ in FIG. 12;

FIG. 15 is a partial explanatory view showing a frame light-shielding layer and a sealant of a color liquid crystal display element according to a fifth embodiment of the present invention.

FIG. 16 is a schematic sectional view taken along line JJ ′ of FIG. 15 of a color liquid crystal display device according to a fifth embodiment of the present invention.

FIG. 17 is a schematic sectional view of the color liquid crystal display device according to a fifth embodiment of the present invention, taken along line KK ′ in FIG.

FIG. 18 is an explanatory diagram showing a rubbing direction of an alignment film of a color liquid crystal display device according to a sixth embodiment of the present invention.

FIG. 19 is a schematic plan view showing a region having good visual characteristics of a color liquid crystal display device according to a sixth embodiment of the present invention.

FIG. 20 is a partial explanatory view showing a frame light-shielding layer and a sealant of a color liquid crystal display element according to a seventh embodiment of the present invention.

FIG. 21 is a schematic sectional view of the color liquid crystal display device according to a seventh embodiment of the present invention, taken along line NN ′ in FIG. 20;

FIG. 22 is a schematic sectional view of the color liquid crystal display device according to a seventh embodiment of the present invention, taken along line OO ′ of FIG. 20;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Color liquid crystal display element 11 ... TFT 12 ... Array substrate 13 ... Counter substrate 14 ... Liquid crystal composition 15a, 15b ... Alignment film 16 ... Sealant 16a ... Injection port 17 ... Glass substrate 18 ... Semiconductor layer 27 ... Red (R) Color coloring layer 28 green (G) coloring layer 30 column spacer 31 frame light-shielding layer 31a injection region 32 color filter 34 pixel electrode 37 counter electrode 38 sealant 40 light-shielding region 52a 52b: vertical alignment film

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H089 LA22 LA24 QA05 QA12 QA14 TA01 TA04 TA05 TA12 2H090 HA04 HA06 HB03X HB04X HB08Y HC12 JC17 LA03 LA04 LA15 MA01 MB01 2H091 FA02Y FA34Y FD02 GA01 GA07 GA08 GA17 LA12 GA13 GA13

Claims (11)

[Claims] 1. A liquid crystal display device in which a liquid crystal composition is sealed in a gap between a pair of substrates disposed opposite to each other, an injection port is provided to surround a display region in which the liquid crystal composition is sealed, and to fix the pair of substrates. Sealing agent, a frame light-shielding layer that shields the periphery of the display area, an injection area formed in the frame light-shielding layer so as to pass the liquid crystal composition at the injection port position, A liquid crystal display device comprising: a light-shielding region made of a liquid crystal composition which is vertically interposed between a pair of substrates. 2. The liquid crystal display device according to claim 1, wherein a vertical alignment film is disposed in contact with the liquid crystal composition in an injection region of the substrate pair. 3. A gap holding means comprising an organic layer for holding a gap between the pair of substrates constant in a display area of the pair of substrates,
3. The injection region holding means, comprising an organic layer of the same layer as the gap holding means, provided at the injection region of the substrate pair, for holding the gap between the substrate pairs constant. The liquid crystal display device according to any one of the above. 4. The liquid crystal display device according to claim 1, wherein the inlet is provided on a side of the periphery of the display area in a direction having good viewing angle characteristics. 5. A liquid crystal display device in which a liquid crystal composition is sealed in a gap between a pair of substrates arranged to face each other, an injection port is provided to surround a display region in which the liquid crystal composition is sealed, and to fix the pair of substrates. Sealing agent, a frame light-shielding layer that shields the periphery of the display area, an injection area formed in the frame light-shielding layer so as to pass the liquid crystal composition at the injection port position, A liquid crystal display device comprising: a light-shielding region made of a liquid crystal composition to which a voltage is constantly applied, which is interposed in a gap between a pair of substrates. 6. The liquid crystal display device according to claim 5, wherein a voltage application terminal for applying a voltage to the liquid crystal composition is arranged in the injection region of the substrate pair. 7. A transparent electrode made of a transparent conductive film for applying a voltage to a liquid crystal composition is provided in a display region of a substrate pair, and a voltage application terminal is made of the same transparent conductive film as the transparent electrode. The liquid crystal display device according to claim 6, wherein: 8. A gap holding means comprising an organic layer for keeping a gap between the pair of substrates constant in a display region of the pair of substrates,
8. The injection region holding means comprising an organic layer of the same layer as the gap holding means and provided to keep the gap between the substrate pairs constant in the injection region of the substrate pair. The liquid crystal display device according to any one of the above. 9. The liquid crystal display device according to claim 8, wherein no voltage application terminal is formed at the position of the injection region holding means. 10. The liquid crystal display device according to claim 5, wherein the inlet is provided on a side of the periphery of the display area in a direction having a good viewing angle characteristic. 11. A signal line and a scanning line that intersect each other on one of the substrate pairs, a switching element provided at each intersection of the signal line and the scanning line, and the signal line and the scanning. A coloring layer provided so as to cover the line and the switching element; a pixel electrode disposed on the coloring layer and electrically connected to the switching element; and a frame light-shielding layer. The liquid crystal display device according to claim 1, wherein: