JP2000214454A - Liquid crystal display element and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a liquid crystal display element utilizing a reflection plate improved in the reliability of a noble metal layer by forming the noble metal layer such as silver layer on a non-noble metal layer. SOLUTION: A reflection plate 13 provided with a polarizing plate to reflect incident light on the liquid crystal layer 3 is stuck to one surface of a liquid crystal cell 10. A reflection plate 20 constituting the reflection plate 13 has a multilayer structure consisting of a silver deposition layer laminated on an aluminum foil with hair lines via a coating layer or the like. By forming a protective layer 14 for avoiding the invasion of ions to the periphery of the reflection plate 13, the invasion of chloride ions into the silver deposition layer is avoided. Consequently, the silver deposition layer is not corroded and the liquid crystal display element capable of realizing a high quality display over a long period can be obtained.

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 element used in a reflection type liquid crystal display device and a method of manufacturing the same, and more particularly, to a liquid crystal display element using a noble metal layer such as a silver deposition layer as a reflection plate, and The present invention relates to the manufacturing method.

[0002]

2. Description of the Related Art Conventionally, as a reflection type liquid crystal display device requiring a deflecting plate and a reflection plate, a twisted nematic (TN) type liquid crystal display device, a super twisted nematic (STN) type liquid crystal display device and a two-terminal element liquid crystal device have been known. A display device, a three-terminal element liquid crystal display device, and the like can be given.

[0003] As shown in FIG. 3, a liquid crystal display element used in such a reflection type liquid crystal display device has a reflection plate 120.
Reflecting plate 113 with polarizing plate with integrated polarizing plate 112
Is used. The polarizing plate 112 is formed by covering both surfaces of the polarizer 101 with the protective films 102, and includes an adhesive 127.
To the reflection plate 120. Also,
A release film 103 is attached via an adhesive 127 to a surface opposite to the surface to which the reflection plate 120 is attached.

[0004] Specific techniques of the above-mentioned reflection plate include a high reflection film for a liquid crystal display disclosed in JP-A-8-294987 and JP-A-7-63908.
And a reflector for a liquid crystal display device disclosed in JP-A-8-114798.

[0005] As shown in FIG. 4, a high reflection film is a polyethylene terephthalate (PET) film 1
An undercoat layer 124, a silver layer 125, and a top coat layer 126 are sequentially laminated on the substrate 21. Further, as shown in FIG. 5, the reflection plate is made of an aluminum foil 123 with a hairline, an undercoat layer 124, and a silver layer 12 on a PET film 121 via an adhesive 122.
5, the top coat layer 126 is sequentially laminated. Further, although not shown, the reflection plate has a structure in which a silver thin film or an aluminum thin film is formed on a film sheet having an uneven surface.

The high reflection film is generally used as a reflection plate of a reflection type liquid crystal display device.
On the other hand, since the reflection plate forms the silver layer 125 on the hairline formed on the aluminum foil 123,
Directivity can be given to the reflected light. therefore,
In the high reflection film, it is possible to condense the light diffused to the surroundings to the observer side, and it is possible to improve the brightness of the reflection type liquid crystal display device. Originally, the same effect can be obtained.

[0007] In the above-mentioned high reflection film and the reflection plate, both use a silver vapor-deposited layer formed by vapor-depositing silver as the silver layer 125 to reflect light. Noble metals such as silver have a higher light reflection efficiency than other metals such as aluminum, and especially silver have a higher reflection efficiency (in general, aluminum has a reflectance of about 90%, and silver has a reflectance of about 96%). It is suitably used for a reflection plate of a liquid crystal display device.

In the conventional silver vapor deposition technique, it is difficult to vapor-deposit silver on the hairline, and thus it has been difficult to commercialize a particular reflection plate. However, in recent years, it has finally been commercialized due to the improvement of silver deposition technology, and can be used as a reflector.

Further, Japanese Patent Application Laid-Open No. 6-184751 discloses a silver composite article having excellent corrosion resistance and a method for producing the same, with respect to a silver composite article mainly containing silver.
In the technique disclosed in this publication, a silicon nitride film having a thickness capable of maintaining transparency as a protective layer on a surface of a base material having a predetermined shape mainly composed of silver, and satisfying a protective function formed thereon. A layer made of a silicon oxide film having a thickness is formed. Therefore, it is possible to provide a silver composite article having excellent reflectance and corrosion resistance and a method for efficiently producing the silver composite article without oxidizing silver.

[0010]

However, since silver does not form a passivation film in the air, corrosion progresses if left for a long time. Therefore, in the case of a reflection plate or a high-reflection film using silver, if there is no structure for preventing silver corrosion, the light reflection efficiency is greatly reduced due to silver corrosion,
This causes a problem of deteriorating the display quality of the liquid crystal display element.

In particular, silver is strongly corroded by chloride ions.
Simply coating the surface of the silver layer 125 and isolating it from the outside is not sufficient, and chloride ions are
It is necessary to have a configuration that does not penetrate into

In the above high reflection film, the silver layer 125
By using a material having a high ability to block chloride ions for the undercoat layer 124 and the top coat layer 126, which are coated with silver, corrosion by silver chloride ions is avoided.
However, as described above, in this high reflection film, part of the reflected light is diffused, so that a very high brightness cannot be obtained.

Further, in the above-mentioned reflector, a material having a high chloride ion blocking ability cannot be used for the undercoat layer 124 and the top coat layer 126 due to the adhesiveness with the aluminum foil 123 with the hairline. Therefore, chloride ions easily enter from the end portions of the undercoat layer 124 and the top coat layer 126, that is, the end surfaces around the reflector. As a result, the silver ion reacts with the chloride ion to generate silver chloride, which causes deterioration of the reflector.

Further, in the case of the reflector, no mention is made of the coating layer, and no consideration is given to the deterioration of the silver layer.

In addition, since silver is coated with a silicon nitride film and a silicon oxide film, silver composite articles have excellent chloride ion blocking ability, but are very expensive. Therefore, when this silver composite article is used as a reflector, the manufacturing cost of the reflective liquid crystal display device increases.

The present invention has been made in view of the above problems, and has as its object to form a noble metal layer such as silver on a non-noble metal layer and further improve the reliability of the noble metal layer. An object of the present invention is to provide a liquid crystal display element using a reflection plate and a method for manufacturing the liquid crystal display element.

[0017]

According to a first aspect of the present invention, there is provided a liquid crystal display device comprising a liquid crystal layer sealed between a pair of light-transmitting substrates. A liquid crystal display element comprising a non-noble metal layer and a multi-layered reflective plate having a noble metal layer formed on the non-noble metal layer, which is bonded to the outer side of one of the optical substrates. And a protective layer for preventing intrusion of ions into the reflection plate.

According to the first aspect of the present invention, since the protective layer for preventing intrusion of ions is formed on the end face around the reflector, the intrusion of ions that corrode the noble metal layer from the end face is prevented. can do. For example, when a silver layer is used as a noble metal layer, chloride ions corrode the silver layer violently. However, the protection layer prevents the silver layer from being corroded, and a high-quality display can be displayed for a long time. Can be maintained.

Further, since the protective layer is formed around the reflector, the protective layer does not adversely affect the reflective surface of the reflector. Therefore, a decrease in display quality of the liquid crystal display element can be avoided.

The liquid crystal display device according to the second aspect of the present invention is
In order to solve the above-mentioned problem, in addition to the configuration of the first aspect, the noble metal layer is made of a material containing silver as a main component.

According to a third aspect of the present invention, there is provided a liquid crystal display device according to the first or second aspect.
In addition to the configuration described above, the non-noble metal layer is made of a material containing aluminum as a main component, and has a hairline on its surface.

According to the configuration of the second or third aspect, the light reflection efficiency of the reflector can be further improved, and the addition of the configuration of the first aspect prevents corrosion of the noble metal layer. Since it can be effectively prevented, higher quality display can be maintained for a long period of time.

According to a fourth aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device, wherein a liquid crystal layer is sealed between a pair of light transmitting substrates. In a method for manufacturing a liquid crystal display element in which a reflector having a multilayer structure having a non-noble metal layer and a noble metal layer formed on the non-noble metal layer is bonded to one outer side of the reflector, It is characterized in that a protective layer for preventing intrusion of ions is applied and formed on the periphery.

According to the fourth aspect of the present invention, since the protective layer is formed around the reflector, it is possible to prevent the penetration of ions that corrode the noble metal layer from the end face.

Further, since the protective layer is formed by applying the protective layer after bonding the reflector, the protective layer can be formed uniformly. As a result, the ability of the protective layer to prevent ion penetration can be further improved.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. Note that the present invention is not limited to this.

The liquid crystal display device according to the present invention is used as a display device of a reflection type liquid crystal display device. As shown in FIG. 1, the liquid crystal display element 1 has a phase difference plate 11 bonded to one surface of a liquid crystal cell 10 and a polarizing plate 12 bonded thereon, and a polarizing plate 12 bonded to the other surface. The reflecting plate 20 including the plate 12 (the reflecting plate 13 with a polarizing plate) is attached to the protective layer 14 so as to cover the periphery of the reflecting plate 13 with a polarizing plate.

As shown in FIG. 1, the liquid crystal cell 10
A liquid crystal layer 3 is sandwiched between a pair of translucent substrates 2. The liquid crystal layer 3 is sealed between the translucent substrates 2 by a sealing material (not shown). On each opposing surface of each translucent substrate 2, a not-shown pixel electrode, a signal line, a scanning line, and the like are formed. That is, as the liquid crystal cell 10, a liquid crystal cell conventionally used for a liquid crystal display element for a reflection type liquid crystal display device can be suitably used.

The reflection plate 20 in the present invention is for reflecting light incident on the liquid crystal layer 3. As shown in FIG. 2, the reflection plate 20 includes a plastic film 21, a non-precious metal layer 23 bonded to a plastic film 21 via an adhesive 22, and an undercoat layer (intermediate layer) 24 thereon.
A noble metal layer 25 and a top coat layer 26 are formed. If necessary, a layer made of another material may be formed between the respective layers or on the surface of the reflection plate 20.

As shown in FIG. 2, the reflecting plate 20 is preferably bonded to the polarizing plate 12 with an adhesive 27 to form a reflecting plate 13 with a polarizing plate. With this configuration, the liquid crystal display element 1 as shown in FIG. 1 can be easily obtained simply by pasting the liquid crystal cell 10 as it is.

As the plastic film 21,
Stretched or unstretched polyethylene terephthalate (PE
T) -based film, stretched or unstretched polypropylene (O
PP) -based films, polyamide-based films, polycarbonate-based films, acetate-based films, acrylic films, and the like. Among them, PET-based films are particularly preferable because of their excellent dimensional stability and mechanical strength.

The plastic film 21 may contain various fillers such as inorganic substances, organic substances, dyes, pigments and the like, if necessary. The film thickness is 20
１００100 μm, preferably 25-6
More preferably, it is within the range of 0 μm.

As the adhesive 22, a material generally used for manufacturing the reflection plate 20 can be suitably used. Further, the layer thickness is not particularly limited.

The material of the non-noble metal layer 23 includes aluminum, aluminum alloy, copper and the like. It is preferable that these non-noble metal layers 23 have irregularities on their surfaces or have hairlines. Examples of a method for forming a layer include a vacuum deposition method and a plating method, and a method in which a foil is formed by rolling and the foil is used as a layer.

As the non-noble metal layer 23 used in the present invention, a layer or foil composed of a material containing aluminum as a main component is preferable among the above, and an aluminum foil with a hairline is particularly preferable. The material containing aluminum as a main component means a material containing at least 50% or more of aluminum. Also, the hairline is
For example, it shows fine hair-like irregularities generated on the mirror surface of the aluminum foil by rotating the rotating brush in contact with the mirror surface.

The thickness of the non-noble metal layer 23 is not particularly limited, but is preferably in the range of 5 to 30 μm, and more preferably in the range of 10 to 20 μm.

Examples of the material of the noble metal layer 25 include silver, silver alloy, silver with added impurities, gold, gold alloy, and gold with added impurities. Examples of the method for forming the layer include a vacuum evaporation method and a plating method. As the noble metal layer 25 used in the present invention, from the viewpoint of light reflection efficiency and the like, a layer composed of a material containing silver as a main component is preferable among the above, and a silver vapor deposition layer formed by a vacuum vapor deposition method is most preferable. preferable. Note that a material containing silver as a main component means a material containing at least 50% or more of silver.

The thickness of the noble metal layer 25 is 5 nm or more and 15
0 nm or less, preferably 50 nm or more and 100
More preferably, it is less than nm. If the thickness is less than 5 nm, the noble metal layer 25 tends to have an island shape, and it is difficult to form a uniform layer, which is not preferable. On the other hand, when the thickness is 150 nm or more, the thickness is such that the reflection layer can be formed with only a single layer, so that the precious metal is used more than necessary in the reflection plate 20 having a multilayer structure, which is not preferable in view of cost.

The undercoat layer 24 and the top coat layer 26 are made of a material which improves the adhesion between the above layers and the film and which prevents the noble metal layer 25 from being separated from the outside to prevent corrosion. Especially undercoat layer 2
4 is the noble metal layer 2 in the reflection plate 20 of the present invention.
5 and an intermediate layer interposed between the non-noble metal layer 23.

As the material used for the undercoat layer 24 and the top coat layer 26, for example,
Amino resin, amino alkyd resin, acrylic resin, styrene resin, acryl-styrene copolymer, polyester resin, vinyl chloride resin, vinyl chloride-vinyl acetate copolymer, polyvinyl butyral resin, urethane resin , Urea resin, melamine resin, urea-melamine resin, epoxy resin, fluorine resin, polycarbonate, nitrocellulose, cellulose acetate, alkyd resin, rosin-modified maleic resin, polyamide resin, and the like. A resin paint containing only one of them or a resin paint containing a mixture thereof can be suitably used.

The method for forming the undercoat layer 24 and the top coat layer 26 is not particularly limited.
A forming method of applying and drying a resin coating containing the above-described material as a component by a conventional coating method can be preferably used. The thicknesses of the undercoat layer 24 and the top coat layer 26 are not particularly limited.
It is preferably in the range of 1 to 10 μm,
More preferably, it is within the range of 3 μm.

As shown in FIG. 2, the polarizing plate 12 is bonded to the reflecting plate 20 of the present invention, which is formed by laminating each of the above layers or films, via a layer of an adhesive 27. Thereby, the reflection plate 13 with a polarizing plate is obtained.

The method of laminating the reflection plate 20 and the polarizing plate 12 is not particularly limited, and a method generally used conventionally can be suitably used. Similarly, the pressure-sensitive adhesive 27 is not particularly limited, and an adhesive generally used conventionally can be suitably used. Further, the layer thickness is not particularly limited.

As shown in FIG. 1, in the liquid crystal display element 1 according to the present invention, a retardation plate 11 and a polarizing plate 12 are attached to one surface of the liquid crystal cell 10 and the reflection plate with the polarizing plate is attached to the other surface. Although it is manufactured by laminating the plate 13, the method of laminating each of the above-described components to the liquid crystal cell 10 is not particularly limited, and a conventional method can be suitably used.

Here, the top coat layer 26 and the under coat layer 24 cannot be made of a material having a high chloride ion blocking ability from the viewpoint of adhesion to the aluminum foil with hair lines. Therefore, the liquid crystal cell 1
When they are bonded to each other, chloride ions can very easily enter from the end face around the reflector 13 with the polarizing plate. When chloride ions enter the reflecting plate 13 with a polarizing plate, the noble metal layer 23 is corroded severely, particularly if the noble metal layer 23 is made of a material containing silver as a main component.

Therefore, in the liquid crystal display device 1 and the method of manufacturing the same according to the present invention, as shown in FIG.
It is necessary to form a protective layer 14 having an ion intrusion prevention function for preventing intrusion of ions into the noble metal layer 25 (silver vapor deposition layer) on the peripheral end surface of the reflection plate 13 with a polarizing plate attached to the reflection plate 13. .

Protective layer 1 having the above-mentioned ion penetration preventing function
The material 4 is not particularly limited as long as it can prevent chloride ions from entering and does not react with the silver reflector 20. For example, paraffin, chloride chloride, aluminum wax, zirconium-containing paraffin emulsion, Cationic activators (alkylamidomethylpyridinium chloride) such as silicone oil, alkylchromic chloride, alkylpyridinium salt, methylol stearamide, alkylketene dimer, metal soap, octadecylethylene urea, and chiron / zelan / velan (all trade names) ), A complex of perfluorocarbon acid and a chromium salt, a low molecular weight polyethylene, a protective agent mainly composed of trichlorosilanized tallow, etc .; SRS-500 (trade name, manufactured by Seimi Chemical Co., Ltd.), neosterin (trade name) Name, manufactured by Nikka Chemical Co., Ltd., Octex EM (trade name, manufactured by Hodogaya Chemical Co., Ltd.), palladium (trade name, manufactured by Ohara Palladium Co., Ltd.), Asahi Guard (trade name, manufactured by Asahi Glass Co., Ltd.), Scotch Guard (trade name, Sumitomo 3M), Texguard (trade name, manufactured by Daikin), 301-2 epoxy resin (trade name, EP
Commercially available protective agents such as O-TEC, one-component silicone sealite (trade name, manufactured by Dow Corning Toray Silicone Co., Ltd.) and the like can be suitably used.

The method for forming the protective layer 14 is not particularly limited, and the protective agent is layered so as to completely cover the peripheral end surface of the reflector 13 with a polarizing plate attached to the liquid crystal cell 10. Any method can be used as long as the method is formed in the above.
For example, a method in which a reflective plate with a polarizing plate 13 is attached to the liquid crystal cell 10 and the above protective agent is applied in a layered manner on the peripheral end surface thereof can be suitably used. Protective layer 1
The layer thickness of No. 4 is not particularly limited either, and may be any thickness as long as each of the above protective agents can surely prevent intrusion of ions (particularly chloride ions).

As described above, the liquid crystal display element 1 according to the present invention and the method for manufacturing the same are characterized in that when the reflector 13 with a polarizing plate is bonded to the liquid crystal cell 10,
In order to prevent chloride ions from entering from the end face around 3, a protective layer 14 is formed on the end face. As a result, the reliability of the noble metal layer having high light reflection efficiency, particularly, the silver vapor deposition layer is improved, so that it is possible to provide the liquid crystal display element 1 which can maintain high-quality display for a long time and has excellent brightness. it can.

Next, the liquid crystal display device 1 according to the present invention and a method for manufacturing the same will be described based on specific examples and comparative examples.

[Embodiment] As shown in FIG. 2, a PET film having a film thickness of 50 μm was used as a plastic film 21, and a hairline was formed on the PET film as a non-precious metal layer 23 via a layer of a polyvinyl adhesive 22. Aluminum foil (foil thickness 15 μm) was laminated. Further, an undercoat layer 24 was formed by applying a resin paint made of a polyester-based resin on the aluminum foil and then drying it.

On the undercoat layer 24, as a noble metal layer 25, a silver vapor deposition layer is formed by a vacuum vapor deposition method so as to have a layer thickness of 100 nm.
The top coat layer 26 was formed by applying a resin paint composed of a polyester-based resin and then drying.

The polarizing plate 12 was bonded to the thus-formed reflecting plate 20 with an acrylic adhesive 27 to form a reflecting plate 13 with a polarizing plate. The reflecting plate 13 with the polarizing plate, the retardation plate 11 and the polarizing plate 12 were bonded to each surface of the liquid crystal cell 10, respectively.

After bonding the above-mentioned reflector 13 with a polarizing plate, a protective agent containing metaxylene hexafluoride as a main component as a protective layer: SRS-500 (as a protective layer 14) is provided on an end surface around the reflector 13 with a polarizing plate. (Trade name, manufactured by Seimi Chemical Co., Ltd.) was applied to a sufficient thickness with a cotton swab and dried. Thus, a liquid crystal display element 1 according to the present invention as shown in FIG. 1 was obtained.

In order to confirm the performance of preventing the intrusion of chloride ions in the liquid crystal display element 1 (anti-invasion property), a 5% aqueous solution of sodium chloride was applied to the end surface around the reflector 13 with a polarizing plate, and the temperature was 40 ° C. Put into a test tank of 95% humidity and put 10
A test of high-temperature and high-humidity storage reliability, which was held for 00 hours, was performed. Table 1 shows the results.

In Table 1, 〇 indicates that there is no abnormality in the deposited silver layer, △ indicates that there is a slight abnormality in the deposited silver layer, and x indicates that there is an abnormality in the deposited silver layer.

COMPARATIVE EXAMPLE 1 Before bonding the reflector 13 with a polarizing plate in the above embodiment to the liquid crystal cell 10, the above protective agent was applied to the peripheral end surface thereof to form a protective layer 14, and then the liquid crystal cell 10 to obtain a comparative liquid crystal display device (1). The comparative liquid crystal display element (1) was subjected to a high-temperature and high-humidity storage reliability test in the same manner as in the above-described example. Table 1 shows the results.

[Comparative Example 2] The end face around the reflector 13 with a polarizing plate in the above embodiment was bonded to the liquid crystal cell 10 without applying the above protective agent at all (ie, without forming the protective layer 14). Thus, a comparative liquid crystal display element (2) was obtained. For this comparative liquid crystal display element (2), a high-temperature and high-humidity storage reliability test was performed in the same manner as in the above-mentioned Example and Comparative Example 1.
Table 1 shows the results.

[0059]

[Table 1]

As can be seen from the results shown in Table 1, the liquid crystal display element 1 according to the present invention is a comparative liquid crystal display element (1) or (2).
In comparison, chloride ions do not enter the silver deposition layer even under high temperature and high humidity conditions of a temperature of 40 ° C. and a humidity of 95%. Therefore, if the liquid crystal display element 1 is used, it is possible to obtain a reflection type liquid crystal display device which enables high-quality display for a long period of time.

In the comparative liquid crystal display element (1), that is, the liquid crystal display element manufactured by applying the protective layer 14 to the end face around the reflector 13 with the polarizing plate and then bonding the same to each other for 750 hours. After the lapse of time, an abnormality was observed in the silver deposition layer. Therefore, in the method for manufacturing a liquid crystal display element according to the present invention, the protection layer 14 is applied to the liquid crystal cell 10 by the reflection plate 2.
It can be seen that it is preferable to carry out the process after laminating 0.

In the present embodiment, an example has been described in which, when a silver deposition layer is used for the reflector, a protective layer for preventing intrusion of chloride ions that violently corrodes the silver deposition layer has been described. However, the present invention is not limited to this, and can be widely applied to prevention of intrusion of components that adversely affect the configuration inside the reflector from around the reflector.

[0063]

As described above, the liquid crystal display device according to the first aspect of the present invention comprises a liquid crystal layer sealed between a pair of light transmitting substrates, and one of the light transmitting substrates. In a liquid crystal display element in which a reflector having a multilayer structure having a non-noble metal layer and a noble metal layer formed on an upper layer of the non-noble metal layer is adhered to the outside, an ion into the reflector is formed around the reflector. This is a configuration having a protective layer for preventing the intrusion of the air.

Therefore, in the above configuration, it is possible to prevent intrusion of ions that corrode the noble metal layer from around the reflection plate, so that high quality display can be maintained for a long time. Further, since the protective layer does not adversely affect the reflection surface of the projection plate, it also has the effect of preventing a deterioration in display quality of the liquid crystal display element.

The liquid crystal display device according to claim 2 of the present invention
As described above, in addition to the structure of the first aspect, the noble metal layer is made of a material containing silver as a main component.

According to a third aspect of the present invention, there is provided a liquid crystal display device according to the first aspect, wherein the non-noble metal layer is made of a material containing aluminum as a main component. This is a configuration having a hairline on its surface.

Therefore, in each of the above structures, the light reflection efficiency of the reflection plate can be further improved, and
There is an effect that higher quality display can be maintained for a long time.

According to a fourth aspect of the present invention, a liquid crystal display element is manufactured by enclosing a liquid crystal layer between a pair of light transmissive substrates as described above. In a method for manufacturing a liquid crystal display element in which a reflector having a multilayer structure having a non-noble metal layer and a noble metal layer formed on an upper layer of the non-noble metal layer is attached, the ion This is a method of applying and forming a protective layer for preventing the intrusion of ash.

Therefore, according to the above-mentioned method, the penetration of ions that corrode the noble metal layer from around the reflector can be prevented, and the protective layer can be formed homogeneously. There is an effect that the ability can be further improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration of a liquid crystal display device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a configuration of a reflector with a polarizing plate used in the liquid crystal display device of FIG.

FIG. 3 is a cross-sectional view illustrating a configuration of a reflector with a polarizing plate used in a conventional liquid crystal display device.

FIG. 4 is a cross-sectional view showing a configuration of a reflector used in a conventional liquid crystal display element.

FIG. 5 is a cross-sectional view illustrating another configuration of a reflector used in a conventional liquid crystal display element.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid crystal display element 2 Translucent substrate 3 Liquid crystal layer 13 Reflector with a polarizing plate 14 Protective layer 20 Reflector 23 Non-noble metal layer 24 Undercoat layer (intermediate layer) 25 Noble metal layer

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H042 DA02 DA04 DA05 DA07 DA11 DA14 DA17 DA18 DA19 DA21 DB00 DC02 DC03 DD00 DE00 2H091 FA16Z FD07 LA06 LA07 LA30

Claims (4)

[Claims] A liquid crystal layer is sealed between a pair of light-transmitting substrates, and a non-noble metal layer and a noble metal formed on an upper layer of the non-noble metal layer outside one of the light-transmitting substrates. A liquid crystal display device comprising a multi-layered reflector having layers attached thereto, comprising a protective layer around the reflector to prevent ions from entering the reflector. element. 2. The liquid crystal display device according to claim 1, wherein said noble metal layer is made of a material containing silver as a main component. 3. The liquid crystal display device according to claim 1, wherein said non-noble metal layer is made of a material containing aluminum as a main component, and has a hairline on its surface. 4. A liquid crystal layer is sealed between a pair of translucent substrates,
In a method for manufacturing a liquid crystal display element, a reflective plate having a multilayer structure having a non-noble metal layer and a noble metal layer formed on an upper layer of the non-noble metal layer is bonded to one outer side of the light-transmitting substrate. A method for manufacturing a liquid crystal display element, comprising: forming a protective layer for preventing intrusion of ions around the reflector after the above-mentioned step.