JPH085983A - Liquid crystal display device and manufacturing method thereof - Google Patents

Abstract

PURPOSE:To reduce the cost for forming light shielding films and to improve throughput by subjecting a high-polymer phase dispersed with black fillers and a liquid crystal phase to phase sepn. CONSTITUTION:A pair of substrates 1, 10 consisting of glass plates, etc., are disposed to face each other and a display medium having the high polymer phase 15 and the liquid crystal layer 16 is disposed in the spacing therebetween. Picture element electrodes 9 are formed on the display medium side of the one substrate 1 and a counter electrode 12 is formed on the display medium side surface of the other substrate 10. The parts where both electrodes 9, 12 face each other are formed as picture element parts. The high polymer phase 15 is mainly formed in the regions exclusive of the picture elements including the regions formed with TFTs 13 and the black fillers are dispersed in this high polymer phase 15. The liquid crystal layer 16 is mainly formed in the picture element parts. The domains where the liquid crystal molecules are arranged radially concentrically or spirally toward the wall direction of the high polymer phase 15 are formed.

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 in which a display medium is sandwiched between a pair of substrates arranged to face each other, and picture element portions are arranged in a matrix, and a manufacturing method thereof.

[0002]

2. Description of the Related Art Conventionally, there are liquid crystal display devices utilizing various display modes. For example, as a liquid crystal display element utilizing the electro-optical effect, a twisted nematic (TN) mode using nematic liquid crystal or Super twisted nematic (STN) mode liquid crystal display devices have been put to practical use. Also, a liquid crystal display device using a ferroelectric liquid crystal (FLC) mode has been proposed. These conventional display mode liquid crystal display devices require a polarizing plate and thus have low light utilization efficiency, and require alignment treatment, which complicates the manufacturing process.

[0003]

By the way, in the above-mentioned conventional liquid crystal display device of the display mode, there is a problem that the viewing angle characteristic is poor. For example, in TN mode, the initial alignment of liquid crystal molecules is 90% between a pair of substrates when no voltage is applied.
The structure is such that the liquid crystal molecules are twisted and the long axis direction of the liquid crystal molecules rises at a certain angle (pretilt angle) toward one of the substrates. Moreover, when a voltage is applied, alignment treatment is performed so that liquid crystal molecules rise in the same direction. Therefore, when the liquid crystal molecules rise in the halftone, the liquid crystal molecules are tilted in the same direction, so that the apparent refractive index differs depending on the viewing direction of the liquid crystal molecules. Therefore, the contrast varies greatly depending on the viewing direction, and in an extreme case, a display abnormality such as an inversion phenomenon occurs.

Further, in the active matrix driving type liquid crystal display device among such liquid crystal display devices, a plurality of pixel electrodes for applying a voltage to the liquid crystal are formed on one substrate, and each pixel electrode is selectively driven. A non-linear element such as a thin film transistor is formed as a switching element for switching. Since such a non-linear element has a large characteristic dependency and deterioration in characteristics with respect to light irradiation, a resin light-shielding film is usually formed on the non-linear element to shield the non-linear element from light. For such a resin light-shielding film on the TFT-LCD, SID'92 DIGEST pp789-782 is used.
However, the formation method is not described. In general, since such a resin light-shielding film is formed by a spin coating method, there are problems that material cost and device cost are high and throughput is low.

The present invention has been made to solve the above-mentioned problems of the prior art, and a liquid crystal display device capable of improving the viewing angle characteristics, reducing the manufacturing cost, and improving the throughput, and the same. It is intended to provide a manufacturing method.

[0006]

In a liquid crystal display device according to the present invention, a pair of substrates each having an electrode formed thereon are arranged to face each other with the electrodes inside, and a display medium is sandwiched between the pair of substrates. In a liquid crystal display device in which the electrode facing portions existing in a matrix form are pixel portions, the display medium has a liquid crystal phase mainly in the pixel portions, and a portion other than the pixel portions. At least one domain in which liquid crystal molecules are radially, concentrically or spirally arranged is formed in the picture element part, and the black filler is dispersed in the polymer phase. Therefore, the above object is achieved.

In one embodiment, a thin film transistor element for selectively driving picture elements is formed on one of the pair of substrates, and the polymer phase in which the black filler is dispersed is formed on the thin film transistor element. It also functions as a light-shielding film.

In the method for manufacturing a liquid crystal display device according to the present invention, a pair of substrates each having an electrode formed thereon are arranged to face each other with the electrodes inside, and a display medium is sandwiched between the pair of substrates. In a method for manufacturing a liquid crystal display device, in which the electrode facing portions that are present in a matrix with the pixel portions are provided, a material in which at least a black filler is mixed in a photopolymerizable resin or a photosensitive resin between the pair of substrates. And a step of injecting a mixture of a liquid crystal compound with the liquid crystal compound, and irradiating the mixture with light energy through a mask to phase-separate a liquid crystal phase and a polymer phase by photopolymerization. Radial,
The step of obtaining a display medium having at least one domain arranged concentrically or spirally, whereby the above object is achieved.

In one embodiment, at least one of the pair of substrates may be made of a transparent substrate, and the electrodes formed on the transparent substrate may be made of a material having a low UV transmittance. Further, in an embodiment, at least one of the pair of substrates is made of a transparent substrate, and a color filter containing an ultraviolet absorber may be formed on the transparent substrate.

[0010]

In the liquid crystal display device of the present invention, a display medium containing a polymer phase and a liquid crystal phase is sandwiched in a gap between a pair of insulating substrates, at least one of which is transparent and has electrodes formed thereon. . In the picture element portion, as shown in FIG. 6, at least one domain in which liquid crystal molecules are arranged radially, concentrically, or spirally oriented in the wall direction of the polymer phase is formed. FIG. 6A shows a case where the liquid crystal molecules are arranged radially,
(B) shows a concentric circle shape, (c) shows a spiral shape. Such an arrangement of liquid crystal molecules can be obtained, for example, by forming spherulites in the alignment film.

When a voltage is applied to the above liquid crystal cell, the liquid crystal molecules rise radially, concentrically or spirally. Therefore, the apparent refractive indexes from the respective directions are substantially the same, which is very effective in improving the viewing angle characteristics.

Further, a black filler is dispersed in the polymer phase, and the polymer phase containing this black filler functions as a light shielding film.

Further, in the method of the present invention, a mixture of a liquid crystal compound and a material in which a black filler is mixed in a monomer or oligomer of a photocurable resin or a photosensitive resin is injected into a gap between a pair of substrates, When the mixture is irradiated with light energy, the liquid crystal phase and the polymer phase are phase-separated by photopolymerization. At this time, due to the action of the alignment film having the spherulites formed as described above, domains in which the liquid crystal molecules are aligned radially, concentrically, or spirally are formed. The above mixture may contain a polymerization initiator such as a photoinitiator.

When the mixture is irradiated with light energy through a mask, a polymer phase is formed in the irradiated part and the other part becomes the liquid crystal phase. Therefore, depending on the formation position of the mask, the polymer phase in which the black filler is dispersed can be formed on the thin film transistor element and used as the light shielding film.

Since at least one of the pair of substrates is transparent, a mask may be set on the back surface of this substrate. However, when the color filter formed on one transparent substrate is made of a material containing an ultraviolet absorber, This can be used as a mask when light energy is irradiated from the substrate side. Therefore, phase separation can be performed by self-alignment, and a liquid crystal display device with high alignment accuracy can be obtained. Further, when the electrode formed on one of the substrates is made of a material having a low ultraviolet ray transmittance, this can be used as a mask, and at the same time, fading of the color filter which is a problem during exposure can be prevented.

A black filler may be left in the liquid crystal portion on the pixel electrode, but this black filler is uniformly dispersed in the photosensitive resin, and the adhesion with the photosensitive resin is enhanced. However, it does not elute into the liquid crystal as an impurity, and since it has high resistance, there is no problem in displaying.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a sectional view showing a liquid crystal display device of Embodiment 1. In this liquid crystal display device, a pair of substrates 1 and 10 made of a glass plate or the like are arranged so as to face each other, and a display medium having a polymer phase 15 and a liquid crystal phase 16 is provided between the substrates. A pixel electrode 9 is formed on the display medium side surface of one (lower) substrate 1, and a counter electrode 12 is formed on the display medium side surface of the other substrate 10, so that both electrodes 9, 1 are formed.
The part where 2 is opposite is the picture element part. A polymer phase 15 is mainly formed in a region other than the picture element portion including the TFT 13 forming region, and a black filler is dispersed in the polymer phase 15. In addition, the liquid crystal phase 16 is mainly present in the picture element part.
6A, for example, as shown in FIG. 6A, domains in which liquid crystal molecules are arranged radially in the wall direction of the polymer phase 15 or concentrically or spirally arranged are formed.

This liquid crystal display device is manufactured as follows.

First, the manufacturing process of the TFT formation side substrate will be described. On the substrate 1 having an insulating surface, p-Si
25 nm to 200 nm, preferably 70 to 100, of a semiconductor film such as a film by low pressure chemical vapor deposition (LPCVD) or the like.
The semiconductor layer 2 is formed by depositing it to a thickness of about nm and patterning it.

Next, a SiO ₂ film is formed on the semiconductor layer 2 by PC.
200-500 nm, preferably 200 by VD method
The gate insulating film 3 is formed by depositing it to a thickness of about nm and patterning it. A metal film is deposited thereon to a thickness of about 200 to 400 nm by a sputtering method or the like to form the gate electrode 4.

Next, from the gate electrode 4 to the channel region, a Group V element such as phosphorus or its compound or I such as boron is formed.
Impurities of group II elements or their compounds are accelerated at a voltage of 50-
Ion implantation is performed at about 100 keV to form the contact layer 5.

Next, a SiN _x or SiO ₂ film or the like is deposited thereon by a plasma CVD method or the like to a thickness of about 300 to 500 nm, a predetermined portion is etched to open a contact hole, and the interlayer insulating film 6 is formed. To form.

Then, a conductive film is deposited thereon by sputtering or the like to a thickness of about 200 to 700 nm to form the source electrode 7 and the drain electrode 8. Further, a transparent conductive film such as an indium tin oxide film (ITO) is deposited to a thickness of about 50 to 100 nm by a sputtering method or the like to form a pixel electrode 9 to complete the TFT 13.

Next, the process of manufacturing the opposite substrate will be described. First, the pigment-dispersed color filter 11 is formed on the substrate 10 having an insulating surface by a printing method, an electrodeposition method, a spin coater or the like and patterned into a predetermined shape. A transparent conductive film such as ITO is deposited thereon by sputtering or the like to a thickness of about 50 to 100 nm to form the counter electrode 12.

On the picture element electrode 9 of the TFT formation side substrate and the color filter 1 of the opposite side substrate obtained as described above.
An alignment film (not shown) is formed on and above 1. Nylon 6.6, for example, is applied to this alignment film as an alignment film, followed by baking to remove the solvent, and then removing to form spherulites. Thereafter, 4.5 μm plastic beads are scattered on the counter substrate, and both substrates are bonded together by using a sealing resin to produce a liquid crystal cell as shown in FIG.

Next, the process of forming the display medium will be described. First, a mixture of a liquid crystal compound and a material in which at least a black filler is mixed in a photopolymerizable resin or a photosensitive resin is injected into the gap between the pair of substrates, and the mixture is irradiated with light energy through a mask. As a result, the photopolymerizable resin or the photosensitive resin is photopolymerized, and the polymer compound obtained by the polymerization and the liquid crystal compound are phase-separated to form the polymer phase 15 in the light-irradiated portion and the liquid crystal in the non-irradiated portion. Phase 16
Is formed. At this time, since spherulites are formed in the alignment film, one domain in which the liquid crystal molecules in the liquid crystal phase are radial is formed in the liquid crystal phase 16 based on the spherulites.

The above photocurable resin is R-684.
(Nippon Kayaku), styrene, isobornyl methacrylate, or other monomers or oligomers can be used. As the photosensitive resin, a negative type or a positive type can be used.

As the black filler, carbon flakes or pigments such as titanium black, aniline black, iron oxide, manganese oxide and bismuth sulfide can be used.

As the above-mentioned liquid crystal compound, any material can be used as long as it exhibits a liquid crystal state at around room temperature, and can be used in conventional TN mode, STN mode, ECB mode, ferroelectric liquid crystal display mode, light scattering mode and the like. Any of the liquid crystal materials used can be used. For example, ZLI-479 containing 0.4% by weight of a chiral agent (S-811).
2 (manufactured by Merck).

The mixture may contain a photoinitiator and the like in addition to the photocurable resin or the photosensitive resin in which a black filler is dispersed in advance and the liquid crystal material. As a photoinitiator,
For example, Irgacure651 (made by Ciba-Geigy) etc. can be used.

As the mask, the color filter 11 or the counter electrode 12 formed on the counter substrate side can be used.

In this example, a display medium was formed as follows.

First, as shown in FIG. 2 (b), carbon black or pigment was added to 0.1 g of R-684 (Nippon Kayaku Co., Ltd.) as a photocurable resin in the gap between the substrates bonded as described above. 35-45 wt% black filler
% Dispersion, 0.05 g of styrene and 0.85 g of isobornyl methacrylate and 0.4% by weight of a chiral agent (S-811) as a liquid crystal material.
4792 (manufactured by Merck) and Irgacure651 (manufactured by Ciba-Geigy) 0.002 as a photoinitiator
The mixture 14 containing 5 g is poured in a transparent state (about 35 ° C.).

Next, a mask 17 having a light shielding property is set on the counter substrate side so that the pixel electrodes 9 on the TFT formation side substrate are not exposed to light. After that, while maintaining the same temperature, the irradiation intensity was 1 using a high pressure mercury lamp that can obtain parallel rays.
Irradiation for 1 second from the counter substrate side at a position of 0 mW / cm ² -3
A cycle of 0 second non-irradiation is repeated 20 times, and then irradiation is performed for 10 minutes. This photopolymerizes the photocurable resin,
As shown in FIG. 2C, the polymer phase 15 in which the black filler is dispersed and the liquid crystal phase 16 are phase-separated.

When the obtained panel was observed with a polarizing microscope, the liquid crystal domain 16 having the same regularity as the dot pattern of the picture element electrode 9 (the same regularity as the picture element) and the TFT 1
The polymer phase 15 (light-shielding layer) having a line pattern including the above 3 was confirmed. Moreover, in the liquid crystal domain 16, the alignment of the liquid crystal molecules was radial.

(Example 2) In this example, a display medium was manufactured using a negative photosensitive resin as the photocurable resin.

Both substrates were prepared in the same procedure as in Example 1,
As shown in FIG. 3 (a), they are bonded together, and as shown in FIG. 3 (b), OMR as a negative photosensitive resin is placed in the substrate gap.
-83 (manufactured by Tokyo Ohka), in which 35 to 45 wt% of a black filler made of carbon black or a pigment is dispersed in 0.1 g, 0.05 g of styrene and 0.85 g of isobornyl methacrylate are used as liquid crystal materials. ZLI-47 containing 0.4% by weight of chiral agent (S-811)
92 (manufactured by Merck) and Ir as a photoinitiator
gacure651 (made by Ciba Geigy) 0.0025g
The mixture 24 mixed with is injected in a transparent state (about 35 ° C.).

Next, a mask 27 having a light shielding property is set on the counter substrate side so that the pixel electrodes 9 on the TFT formation side substrate are not exposed to light. After that, while maintaining the same temperature, the irradiation intensity was 1 using a high pressure mercury lamp that can obtain parallel rays.
Irradiation for 1 second from the counter substrate side at a position of 0 mW / cm ² -3
A cycle of 0 second non-irradiation is repeated 20 times, and then irradiation is performed for 10 minutes. This photopolymerizes the photocurable resin,
As shown in FIG. 3C, the polymer phase 25 in which the black filler is dispersed and the liquid crystal phase 26 are phase-separated.

When the obtained panel was observed with a polarization microscope, the liquid crystal domain 26 having the same regularity as the dot pattern of the picture element electrode 9 (the same regularity as the picture element) and the TFT 1
The polymer phase 25 (light-shielding layer) having a line pattern including the above 3 was confirmed. Further, in the liquid crystal domain 26, the liquid crystal molecules are arranged in a radial pattern oriented in the wall direction of the polymer phase 25.

Example 3 In this example, instead of forming a mask on the counter substrate side, an ultraviolet absorber was mixed in the color filter on the counter substrate, and this was used as a mask for UV irradiation.

The TFT formation side substrate and the counter side substrate are manufactured by the same procedure as in Example 1 except that the ultraviolet absorber is mixed in the color filter 31 on the counter substrate.

The above-mentioned alignment film (not shown) is formed on the pixel electrode 9 of the obtained TFT formation side substrate and on the color filter of the opposite side substrate. Then, on the counter substrate, 4.
5 μm plastic beads are sprinkled, and both substrates are bonded together by using a sealing resin to produce a liquid crystal cell as shown in FIG.

Next, as shown in FIG. 4 (b), R-684 (manufactured by Nippon Kayaku Co., Ltd.) as a photo-curable resin was added to the substrate gap.
A dispersion of 35 to 45 wt% of a black filler composed of carbon black or a pigment in 1 g, 0.05 g of styrene and 0.85 g of isobornyl methacrylate were used, and a chiral agent (S-811) was used as a liquid crystal material. .4
ZLI-4792 (manufactured by Merck) containing 4% by weight
And a mixture 34 in which 0.0025 g of Irgacure 651 (manufactured by Ciba-Geigy) is mixed as a photoinitiator in a transparent state (about 35 ° C.).

Thereafter, while maintaining the same temperature, the irradiation intensity was 10 mW using a high pressure mercury lamp capable of obtaining parallel rays.
At the position of / cm ² , a cycle of 1 second irradiation-30 seconds non-irradiation from the side of the counter substrate is repeated 20 times, and then irradiation is performed for 10 minutes. At this time, the color filter 31 mixed with the ultraviolet absorber functions as a mask, the photocurable resin is photopolymerized, and the black filler is dispersed in the polymer phase 35 as shown in FIG. 4C. It is separated into a liquid crystal phase 36.

When the obtained panel was observed with a polarization microscope, the liquid crystal domain 36 having the same regularity as the dot pattern of the picture element electrode 9 (the same regularity as the picture element) and the TFT 1
The polymer phase 35 (light-shielding layer) having a line pattern including the above 3 was confirmed. Further, in the liquid crystal domain 36, the liquid crystal molecules are arranged in a radial pattern toward the wall of the polymer phase 35.

(Embodiment 4) In this embodiment, instead of forming a mask on the counter substrate side, a counter electrode 42 is formed using a material having a low UV transmittance such as ZnO, and UV irradiation is performed using this as a mask. went.

A pigment-dispersed color filter 41 is formed by a printing method, an electrodeposition method, a spin coater or the like on the TFT formation side substrate formed by the same procedure as in Example 1, and patterned into a predetermined shape.

Next, a counter side substrate is manufactured by the same procedure as in Example 1 except that zinc oxide (ZnO) is used as the transparent conductive film instead of ITO. The ultraviolet transmittance of the counter electrode 42 can be 5% or less.

The above-mentioned alignment film (not shown) is formed on the picture element electrode 9 of the obtained TFT formation side substrate and on the counter electrode 42 of the counter side substrate.

Thereafter, 4.5 μm plastic beads are scattered on the counter substrate, and both substrates are bonded together by using a sealing resin to manufacture a liquid crystal cell as shown in FIG. 5 (a).

Next, as shown in FIG. 5 (b), R-684 (Nippon Kayaku) 0.
A dispersion of 35 to 45 wt% of a black filler composed of carbon black or a pigment in 1 g, 0.05 g of styrene and 0.85 g of isobornyl methacrylate were used, and a chiral agent (S-811) was used as a liquid crystal material. .4
ZLI-4792 (manufactured by Merck) containing 4% by weight
And a mixture 44 containing 0.0025 g of Irgacure 651 (manufactured by Ciba Geigy) as a photoinitiator in a transparent state (about 35 ° C.).

Thereafter, while maintaining the same temperature, the irradiation intensity was 10 mW using a high pressure mercury lamp capable of obtaining parallel rays.
At the position of / cm ² , a cycle of 1 second irradiation-30 seconds non-irradiation from the side of the counter substrate is repeated 20 times, and then irradiation is performed for 10 minutes. At this time, the counter electrode 42 having a low ultraviolet transmittance of 5% or less functions as a mask, the photocurable resin is photopolymerized, and the polymer phase in which the black filler is dispersed as shown in FIG. 45 and a liquid crystal phase 46 are separated.

When the obtained panel was observed with a polarization microscope, the liquid crystal domain 46 having the same regularity as the dot pattern of the picture element electrode 9 (the same regularity as the picture element) and the TFT 1
The polymer phase 45 (light-shielding layer) having a line pattern including the above 3 was confirmed. Further, in the liquid crystal domain 46, the alignment of the liquid crystal molecules was radial and oriented in the wall direction of the polymer phase 45.

The embodiment of the present invention has been described above, but the present invention is not limited to this, and various modifications can be made.

Although the liquid crystal molecules are arranged radially by forming spherulites in the alignment film in the above embodiment, the present invention is not limited to this, and similarly, spherulites are formed in the alignment film to arrange the liquid crystal molecules. May be concentric or spiral. Further, instead of forming spherulites on the alignment film, any method capable of arranging the liquid crystal molecules radially, concentrically or spirally can be adopted. For example, a method of forming irregularities in the alignment film in the same arrangement as that of the liquid crystal molecules described above, a method of forming a mountain-shaped projection at a position corresponding to the central portion of the picture element portion of the alignment film, or the like can be adopted. Further, it is needless to say that it is possible to adopt a method in which a similar film is formed as a base film of the alignment film, the shape is transmitted to the alignment film, and as a result, a desired shape is formed on the alignment film.

Further, although one domain is formed in the picture element portion in the above embodiment, the present invention is not limited to this, and the arrangement of liquid crystal molecules is radial, concentric or spiral in each picture element portion. Needless to say, the configuration may be such that it has two or more domains in the form of a circle.

Although the liquid crystal display device in which display is performed by active matrix driving using TFTs has been described in the above embodiment, the present invention is not limited to this, and the MIM is not limited to this.
The present invention can also be applied to a liquid crystal display device in which display is performed by active matrix driving using (Metal Insulator Metal) or the like, or a simple matrix driving liquid crystal display device.

As the liquid crystal material, the conventional TN mode, S
TN mode, ECB mode, ferroelectric liquid crystal display mode,
Any liquid crystal material used in a liquid crystal display device such as a light scattering mode can be used, and a configuration in which a polarizing plate is formed is also possible. Further, it can be applied to both a transmissive liquid crystal display device and a reflective liquid crystal display device.

As the substrate material, any substrate can be used as long as at least one of the pair is transparent and has an insulating surface. In addition to the glass substrate, a plastic film substrate or the like may be used. It may have an insulating film formed thereon.

[0061]

As is clear from the above description, in the present invention, the liquid crystal molecules are arranged radially, concentrically or spirally in the pixel portion, which has been a problem in the conventional liquid crystal display device. It is possible to improve the viewing angle characteristics without causing a display abnormality such as a change in contrast depending on the viewing angle direction or a reversal phenomenon. Since it is not necessary to provide a polarizing plate, the light utilization efficiency can be improved, and since it is not necessary to perform the alignment treatment of the alignment film, the manufacturing process can be simplified.

Since the polymer phase in which the black filler is dispersed and the liquid crystal phase are phase-separated, the cost for forming the light shielding film can be reduced and the throughput can be improved. Also,
By irradiating light energy through the mask, a liquid crystal domain can be formed on the pixel electrode and a light shielding film can be formed on the TFT.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a liquid crystal display device of Example 1.

FIG. 2 is a cross-sectional view showing a manufacturing process of the liquid crystal display device of Example 1.

FIG. 3 is a cross-sectional view showing a manufacturing process of the liquid crystal display device of Example 2.

FIG. 4 is a cross-sectional view showing the manufacturing process of the liquid crystal display device of Example 3.

FIG. 5 is a cross-sectional view showing the manufacturing process of the liquid crystal display device of Example 4.

FIG. 6 is a diagram showing an arrangement state of liquid crystal molecules in a pixel portion.

[Explanation of symbols]

 1, 10 Insulating substrate 2 Semiconductor layer 3 Gate insulating film 4 Gate electrode 5 Contact layer 6 Interlayer insulating film 7 Source electrode 8 Drain electrode 9 Picture element electrode 11, 31, 41 Color filter 12, 42 Counter electrode 13 TFT element 14, 24, 34, 44 Mixture 15, 25, 35, 45 Polymer phase 16, 26, 36, 46 Liquid crystal phase 17, 27 Mask

Claims (3)

[Claims] 1. A pair of substrates each having an electrode formed thereon are arranged to face each other with the electrodes inside, and a display medium is sandwiched between the pair of substrates, and the electrode facing portions are arranged in a matrix. In the liquid crystal display device in which is a picture element part, the display medium mainly has a liquid crystal phase in the picture element part, and
A polymer phase is present in a portion other than the picture element portion, and at least one domain in which liquid crystal molecules are radially, concentrically or spirally arranged is formed in the picture element portion, and the polymer phase is black. A liquid crystal display device in which a filler is dispersed. 2. A thin film transistor element for selectively driving a pixel is formed on one of the pair of substrates, and a polymer phase in which the black filler is dispersed is formed on the thin film transistor element. The liquid crystal display device according to claim 1, which also functions as a light-shielding film. 3. A pair of substrates each having electrodes formed thereon are arranged to face each other with the electrodes inside, and a display medium is sandwiched between the pair of substrates, and the electrode facing portions are present in a matrix. In the method for manufacturing a liquid crystal display device in which the pixel portion is, a mixture of a material in which at least a black filler is mixed in a photopolymerizable resin or a photosensitive resin and a liquid crystal compound is injected between the pair of substrates. And a step of irradiating the mixture with light energy through a mask to phase-separate a liquid crystal phase and a polymer phase by photopolymerization, and liquid crystal molecules are arranged radially, concentrically or spirally in the picture element part. And a step of obtaining a display medium having at least one domain described above.