JP2004085874A - Reflecting plate and reflective polarizing plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reflecting plate which has a high degree of freedom of the selection of a base material, which can be made thinner and can considerably reduce manufacturing costs, and to provide a reflective polarizing plate which has a reflective layer formed directly on a polarizer. <P>SOLUTION: A reflecting plate 1 is provided with a base material 11 and a reflective layer 12 formed on the base material 11. The reflective layer 12 is formed on the base material 11 by heating and sintering a coating layer where metal nanoparticles are dispersed and coated. A reflective polarizing plate 10 is provided with the reflecting plate 1 and the polarizing plate 2 stacked on the reflector 1, and a member constituting the polarizing plate 2 is the base material of the reflector 1. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a reflective plate and a reflective polarizing plate that are suitably used in a reflective liquid crystal display device or the like.
[0002]
[Prior art]
Conventionally, a liquid crystal display device comprising a liquid crystal cell, a polarizing plate disposed on the viewing side with respect to the liquid crystal cell, and a polarizing plate disposed on the side opposite to the viewing side with respect to the liquid crystal cell. A reflective liquid crystal display device is known in which a reflective plate is disposed on the opposite side to the viewing side with respect to the polarizing plate disposed on the opposite side. Such a liquid crystal display device has the advantage that the display screen (contents of the liquid crystal cell) can be visually recognized by external light such as sunlight, does not require a backlight, and has low power consumption. Various display devices are applied.
[0003]
Here, as a reflecting plate, what is provided with a base material and the reflective layer which consists of a metal film formed on the said base material is common. The metal film is usually formed on the substrate by a technique such as vapor deposition or sputtering. At this time, the substrate is subjected to a temperature load, and in order to increase the adhesion of the metal film, the substrate is raised to some extent. Since it is necessary to warm, a heat-resistant substrate such as glass is often used. Therefore, there is a problem that the base material made of plastic from which good metal film quality is obtained is limited to those formed from heat-resistant plastics such as resin films such as polyimide, polyethylene terephthalate, polyethylene naphthalate, and polycarbonate. is there.
[0004]
In addition, the base material forming the reflecting plate has to be thickened to some extent in order to avoid the influence of thermal stress and residual stress inside the metal thin film. As a result, the total thickness of the reflecting plate is increased, and there is a problem that it does not meet the recent demand for thinning of liquid crystal display devices. Furthermore, since the film formation by vapor deposition requires a vacuum environment, it has been a factor in increasing the manufacturing cost.
[0005]
On the other hand, a reflective polarizing plate used in a liquid crystal display device is generally formed by separately preparing the reflecting plate with a base material and the polarizing plate, and sticking them together. However, in the form used as the reflective polarizing plate, the base material constituting the reflective plate is not necessarily required as a support for the reflective layer, and is desirably omitted from the viewpoint of reducing the thickness as described above. It is rare. However, if the metal film is directly deposited on the polarizing plate so as to omit the base material, a high-quality metal film cannot be formed or the polarizing plate is deteriorated due to the temperature condition or vacuum condition described above. The current situation is that it has not been put into practical use.
[0006]
More specifically, the upper limit of heat resistance of the plastic polarizing plate depends on the loading time, but the upper limit is about 200 ° C. (practically about 150 ° C.). If the temperature is raised beyond this, the optical function of the polarizing plate changes, and curling and wrinkling occur, making it difficult to use. Therefore, when forming a metal film directly on the polarizing plate, it is necessary that the film can be formed at 200 ° C. or lower and at the lowest possible temperature (preferably 150 ° C. or lower, more preferably 100 ° C. or lower). In addition, since the films constituting the polarizing plate contain moisture and a plasticizer and are often not suitable as adherends for vacuum deposition, it is desirable to form the film at atmospheric pressure.
[0007]
[Problems to be solved by the invention]
The present invention has been made to solve such problems of the prior art, has a high degree of freedom in selecting a base material, can be thinned, and can be manufactured at a relatively low manufacturing cost. It is an object of the present invention to provide a reflective polarizing plate in which a layer is directly formed on a polarizing plate.
[0008]
[Means for Solving the Problems]
It is known that metal nanoparticles, that is, ultrafine metal particles having dimensions on the order of nanometers, behave differently from ordinary metals. This is because the ratio of the surface area to the unit weight of the metal increases, and the influence of the active layer near the surface increases. For example, silver nanoparticles exhibit a specific behavior, and although silver melting point is 961 ° C., silver nanoparticles are 200 ° C. or less, and particularly when the particle size is adjusted, it is melt-fixed at 100 ° C. or less. In addition, the nanoparticle interface is completely metal-bonded.
[0009]
The inventor of the present invention pays attention to the specific behavior of such metal nanoparticles, and as a result of intensive research, found that the metal-bonded nanoparticle interface can be used as a reflective layer of a reflector, and the present invention It has been completed. That is, the present invention provides a reflector comprising a base material and a reflective layer formed on the base material, as described in claim 1, wherein the reflective layer is formed of metal nano-particles on the base material. The present invention provides a reflecting plate characterized in that a coating layer in which particles are dispersed and applied is a heat-sintered layer obtained by heat-sintering.
[0010]
According to the first aspect of the present invention, since the coating layer coated with metal nanoparticles, that is, the coating layer coated with a dispersion containing metal nanoparticles, is heated and sintered, it is large at low temperature and unlike evaporation. A reflective layer can be formed under atmospheric pressure. Therefore, the chemical and physical constraints of the base material forming the reflector are alleviated and the choice of base materials is widened, so the use as a reflector is greatly expanded (as will be described later, the reflective layer is made of a polarizing plate). It is also possible to form the reflecting plate at a relatively low manufacturing cost. In addition, since the reflective layer is formed at a low temperature, there is little influence of thermal stress and residual stress, the thickness of the substrate can be reduced, and the reflective plate can be made thinner. As described above, according to the first aspect of the invention, there is provided a reflector having an excellent advantage that the degree of freedom of selection of the base material is high and the thickness can be reduced, and the manufacturing cost is relatively low. The The coating layer is preferably heated and sintered at 200 ° C. or lower, more preferably 150 ° C. or lower, and even more preferably 100 ° C. or lower.
[0011]
Preferably, as described in claim 2, the base material has a roughened surface on the reflective layer side.
[0012]
According to the invention of claim 2, since the surface of the base material is roughened, a diffuse reflection function can be imparted to the reflector, and when the reflector is applied to a liquid crystal display device, a good visual field is obtained. Angular characteristics can be obtained.
[0013]
In addition, in order to impart a diffuse reflection function to the reflecting plate, as described in claim 3, the base material has a smooth surface on the reflective layer side, and is opposite to the base material side of the reflective layer. You may laminate | stack the light-diffusion member which does not have back scattering substantially on the surface of the side, and does not cancel a polarization state substantially.
[0014]
When the reflecting plate according to the present invention is applied to a liquid crystal display device, it is preferable to reduce the thickness as described above. Therefore, preferably, as described in claim 4, the base material has a thickness of 100 μm or less. In addition, the thickness of the base material is more preferably 80 μm or less, and further preferably 50 μm or less.
[0015]
As the metal nanoparticles, various metals can be applied as long as they can be made into nanoparticles, but from the viewpoint of high reflectance and good corrosion resistance, as described in claim 5, Silver, gold, copper, nickel, chromium, platinum, palladium, and an alloy thereof are preferably used.
[0016]
However, since the metal cannot completely prevent corrosion (oxidation) except for a part thereof, at least one surface of the reflective layer according to claim 6 in order to further enhance corrosion resistance. Further, it is preferable to form a protective layer for preventing oxidation to prevent the reflective layer from coming into contact with oxygen or moisture.
[0017]
Preferably, the surface of the protective layer has a pencil hardness of H or higher. Here, the pencil hardness is a value that is standardized by JIS-K-5400 and measured by scratching the surface with a constant load with a pencil core.
[0018]
According to the invention of claim 7, since the surface of the protective layer is hardened, when handling the reflector, the reflector is prevented from being damaged such as scratches or dents. The effect on display quality when applied to a liquid crystal display device can be suppressed. As will be described later, the present invention is particularly effective when the reflective layer is directly formed on the polarizing plate, that is, when the member constituting the polarizing plate is the base material of the reflective plate. In other words, when the reflective layer is directly formed on the polarizing plate, the reflective layer is in direct contact with the outside through the protective layer (it is not configured to be sandwiched between the polarizing plate and the base material). It is extremely effective to harden the surface of the protective layer in order to easily receive chemical damage and prevent damage. More preferably, the pencil hardness is 2H or more.
[0019]
Preferably, as described in claim 8, the surface of the protective layer is subjected to an antistatic treatment having a resistance value of 10 ¹⁰ Ω or less.
[0020]
Since many of the materials used for the protective layer are insulators, the reflective layer has a capacitor structure sandwiched between insulators. Therefore, it is easy to be charged with static electricity during the handling of the reflector, and there is a risk of discomfort due to electrostatic adsorption or discharge, or adversely affecting surrounding electronic materials. According to the invention of claim 8, since the antistatic treatment is performed on the surface of the protective layer, the above-mentioned discomfort and adverse effects can be reduced.
[0021]
Further, according to the present invention, as described in claim 9, the reflection plate and a polarizing plate laminated on the reflection plate are provided, and a member constituting the polarizing plate is a base material of the reflection plate. It is also provided as a reflective polarizing plate characterized by
[0022]
According to the ninth aspect of the invention, the reflective layer is formed directly on the polarizing plate, that is, the member constituting the polarizing plate (for example, a polarizer protective film) is used as the base material of the reflective plate. There is no need to provide a substrate (support) for the reflector separately from the member, and the reflective polarizing plate can be made thinner by the thickness of the omitted support.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0024]
(First embodiment)
FIG. 1 is a longitudinal sectional view showing a schematic configuration of a reflector according to a first embodiment of the present invention. As shown in FIG. 1, the reflector 1 according to this embodiment includes a base material 11 and a reflective layer 12 formed on the base material 11. The reflective layer 12 is obtained by heating and sintering a coating layer obtained by applying a dispersion liquid in which metal nanoparticles are dispersed on the substrate 11 at 200 ° C. or less, more preferably 150 ° C. or less, and even more preferably 100 ° C. or less. It is formed by.
[0025]
The material of the base material 11 is not particularly limited as long as it has a heat resistance of about 200 ° C. For example, carbonate resin, polyethylene terephthalate resin, epoxy resin, polyethylene naphthalate resin, polyimide resin Etc. can be used. The thickness of the substrate 11 is preferably 100 μm or less, more preferably 80 μm or less, and even more preferably 50 μm or less, particularly in applications that require thinning, such as when the reflector 1 is applied to a liquid crystal display device.
[0026]
The reflective layer 12 according to the present embodiment is formed using any one or a mixture of silver, gold, copper, nickel, chromium, platinum, palladium, and alloys thereof as the metal nanoparticles. Is done. The particle size of the metal nanoparticles is generally about 1 to 100 nm, but is not particularly limited. The particle size of the primary particles is preferably 100 nm or less, more preferably 50 nm or less, and even more preferably 20 nm or less. A coating layer in which such metal nanoparticles are dispersed and coated in a thickness of 0.01 μm or more, preferably 0.02 μm or more, is sintered by heating at 200 ° C. or less, and the particle interface is metal-bonded and integrated to form a reflective layer. 12 functions. In particular, nanoparticles made of silver or an alloy thereof or a mixture of silver nanoparticles and other metal nanoparticles can be suitably used because sintering starts at about 100 ° C.
[0027]
When the reflection plate 1 described above is applied to a reflection type liquid crystal display device, the reflection layer 12 side is attached to a polarizing plate disposed on the opposite side to the viewing side with respect to the liquid crystal cell. Good. Since the reflection plate 1 according to the present embodiment heats and sinters the coating layer on which the metal nanoparticles are dispersedly applied, the reflection layer 12 can be formed at a low temperature and under atmospheric pressure unlike vapor deposition. Therefore, the chemical restrictions and physical restrictions of the base material 11 are relaxed, and the choices of the base material 11 are widened. Therefore, the use as the reflective plate 1 is greatly expanded, and the reflective plate 1 is manufactured at a relatively low manufacturing cost. It is also possible to form. Moreover, since the reflective layer 12 is formed at a low temperature, the influence of thermal stress and residual stress is small, the thickness of the substrate 11 can be reduced, and the reflective plate 1 can be thinned.
[0028]
In addition, in order to obtain a favorable viewing angle characteristic by applying the reflecting plate 1 to a liquid crystal display device, it is preferable to give the reflecting plate 1 a diffuse reflection function. Such a diffuse reflection function can be easily imparted by roughening the surface of the substrate 11 on the reflective layer 12 side. More specifically, a method of directly forming fine surface irregularities by performing sandblasting or solvent treatment on the surface of the substrate 11, or a solution in which a filler is dispersed in a resin is applied to the surface of the substrate 11. In addition to the technique of forming a thin layer with surface irregularities by coating, the shape designed on the surface of the substrate 11 such as embossing or transferring the mold shape after coating with UV polymerization resin The surface of the substrate 11 can be roughened by various methods such as a transfer method.
[0029]
Further, even if the surface of the base material 11 on the reflective layer 12 side is smooth and mirror-like, the diffuse reflection function can be achieved by laminating a light diffusion member on the surface of the reflective layer 12 opposite to the base material 11 side. It is possible to grant. More specifically, a film having a light diffusing function is used as the light diffusing member, and a method of sticking the film to the reflecting layer 12 or a light diffusing resin coated material as the light diffusing member on the reflecting layer 12 is used. In addition to the method of forming a film, a method of sticking a light diffusing adhesive as a light diffusing member can be applied to impart a diffuse reflection function. In addition, as a light-diffusion member, it is preferable to use what does not have back scattering substantially and does not cancel a polarization state substantially. This is because if a light diffusing member that has backscattering and cancels the polarization state is used, the absorption loss due to the polarizing plate increases when combined with the polarizing plate. As the light diffusing member that does not substantially have backscattering and does not substantially cancel the polarization state, for example, the isotropic resin (packaging) has no birefringence in the isotropic resin. It can be formed by embedding fine particles such as glass or isotropic resin fine particles having a refractive index different from that of (embedded resin). For example, silica particles having a refractive index of about 1.44 and a particle size of about 4 μm are used as the fine particles, which are substantially embedded by being dispersed and embedded in an acrylic adhesive having a refractive index of 1.47. It is possible to form a light diffusion adhesive that does not have backscattering and does not substantially eliminate the polarization state. Further, styrene particles having a refractive index of about 1.59 and a particle size of about 6 μm are used as the fine particles, and this is substantially dispersed and embedded in an acrylic resin having a refractive index of 1.51. It is possible to form a light diffusing plate that does not have backscattering and does not substantially eliminate the polarization state. Furthermore, it can be formed by creating a structure having no phase difference in a minute region having a different refractive index, such as a hologram.
[0030]
Here, since the reflective layer 12 is a metal thin film formed by heat-sintering metal nanoparticles, the reflective layer 12 alone undergoes an oxidation reaction by contact with oxygen or moisture, and has a reflective function. Often lost. Accordingly, when long-term reliability is required, it is preferable to form an anti-oxidation protective layer made of a material that hardly transmits moisture and oxygen on the surface of the reflective layer 12. As such a protective layer, it is possible to apply a resin layer having a high crosslinking density, an inorganic thin film formed by a sol-gel method, or the like. Moreover, it is also possible to select an alloyed metal material that is difficult to oxidize as the metal nanoparticles without forming a separate protective layer. In this case, an alloy such as silver, gold, or palladium, or a stainless alloy composed of chromium or nickel is preferably used.
[0031]
Further, when the reflector 1 is handled, it is possible to prevent the reflector layer 12 from being damaged such as scratches or bruises, and to suppress the influence on the display quality when the reflector 1 is applied to a liquid crystal display device. The surface of the protective layer is preferably H or higher (more preferably 2H or higher) in pencil hardness notation. In addition, in order to harden the surface of the protective layer in this way, for example, a hard coat treatment layer made of acrylic resin, epoxy resin, or the like may be applied and formed on the surface of the protective layer, and the entire protective layer may be hardened. It is also possible to form the coating layer.
[0032]
Furthermore, it is preferable that the surface of the protective layer is subjected to an antistatic treatment having a resistance value of 10 ¹⁰ Ω or less. By performing such treatment, in addition to defects caused by the adhesion of dust due to electrostatic adsorption, scratches caused by strong adsorption generated between other members, the reflection layer 12 is discharged due to discharge of charges accumulated in the reflection layer 12. It is possible to solve problems such as destruction.
[0033]
(Second Embodiment)
FIG. 2 is a longitudinal sectional view showing a schematic configuration of a reflective polarizing plate according to the second embodiment of the present invention. As shown in FIG. 2, the reflective polarizing plate 10 according to the present embodiment includes a reflective plate 1a and a polarizing plate 2 laminated on the reflective plate 1a. The polarizing plate 2 has a configuration in which a polarizer 21 is sandwiched between a pair of polarizer protective films 11a.
[0034]
The reflection plate 1 a includes a base material (polarizer protective film) 11 a and a reflection layer 12. The reflector 1a according to the present embodiment is characterized in that a polarizer protective film 11a that is a member constituting the polarizing plate 2 is used as a base material. In other words, the reflecting plate 1a according to this embodiment has a configuration in which the reflecting layer 12 is directly formed on the polarizing plate 2. This is because the reflection layer 12 of the reflection plate 1a has the same configuration as that of the first embodiment described above, and the coating layer on which the metal nanoparticles are dispersedly applied is heated and sintered at a low temperature of 200 ° C. or lower. This is because the chemical restrictions and physical restrictions of the material are alleviated, and the polarizer protective film 11a can also be used as a base material. In addition, as the polarizer protective film 11a, an acrylic resin film, a norbornene resin film, a polyolefin resin film, or the like can be applied in addition to a commonly used TAC (triacetyl cellulose) film.
[0035]
The reflector 1a according to the present embodiment is different from the first embodiment only in that the polarizer protective film 11a is used as a base material, and a protective layer is formed on the surface of the reflective layer 12 or the reflector 1a. The point that the diffuse reflection function can be added is the same as that of the first embodiment, and thus detailed description thereof is omitted.
[0036]
When the reflective polarizing plate 10 described above is applied to a reflective liquid crystal display device, the polarizing plate 2 may be attached to the opposite side to the viewing side of the liquid crystal cell. Since the reflective polarizing plate 10 according to the present embodiment has a configuration in which the reflective layer 12 is directly formed on the polarizing plate 2, the base of the reflective plate 1a is separated from the polarizer protective film 11a included in the polarizing plate 2. There is no need to provide a material (support), and the reflective polarizing plate 10 can be reduced in thickness by the thickness of the omitted support.
[0037]
【Example】
Hereinafter, the features of the present invention will be further clarified by showing examples and comparative examples.
[0038]
(Example 1)
A dispersion in which primary particles of silver nanoparticles (particle diameter φ5 nm) are dispersed in water by 1% by weight is applied onto a saponified Toray polyethylene terephthalate film (thickness 12 μm) with a wire bar coater and dried. It was. The coating layer (nanoparticle film) thus formed had a thickness of about 0.03 μm.
[0039]
Next, when the said application layer was heat-processed at 80 degreeC for 10 minute (s), sintering advanced and it turned out that it functions as a reflecting plate. When the reflection plate formed in this manner was attached to the polarizing plate, it was found that the reflection plate had good appearance characteristics without being affected by hot water.
[0040]
(Example 2)
A dispersion obtained by dispersing 1% by weight of silver nanoparticle primary particles (particle diameter φ5 nm) in water was applied to a saponified Nitto Denko polarizing plate TEG1465AGS1 film (thickness: about 140 μm) with a wire bar coater. , Dried. The coating layer (nanoparticle film) thus formed had a thickness of about 0.05 μm. In addition, the surface of the TEG1465AGS1 film had a diffusion function with a haze value of about 25, and the surface also functioned as a protective layer for preventing moisture and oxygen from reaching the coating layer.
[0041]
Next, when the said coating layer was heat-processed at 80 degreeC for 10 minute (s), sintering advanced and it turned out that it functions as a reflection type polarizing plate. The diffused reflectance of the reflective polarizing plate thus formed was 60%. In addition, it was found that there was no hot-bath or deterioration, and that it had good appearance characteristics.
[0042]
Next, an acrylic resin hard coat treatment layer having a surface hardness of 2H and a thickness of 5 μm is applied and formed on the reflective layer side of the formed reflective polarizing plate, and the reflective layer is mechanically and chemically protected. A reflective polarizing plate having handleability could be obtained. Such a reflection-type polarizing plate has an overall thickness of only about 150 μm, and is thinner than about 235 μm of EGW3206GT manufactured by Nitto Denko, which is a general reflection-type polarizing plate.
[0043]
Next, the surface of the hard coat layer of the reflective polarizing plate was subjected to an antistatic treatment with an antistatic agent (Fine Chemical Japan Co., Ltd. EP-8). As a result, the resistance value of the surface becomes 5 × 10 ⁸ Ω or less, and electrostatic charging of the reflective layer during handling is suppressed, and problems such as deterioration in handling properties due to rapid discharge can be suppressed.
[0044]
Example 3
80% by weight of acrylic pressure-sensitive adhesive (Nitto Denko NO.7, refractive index 1.47) and 20% by weight of isotropic spherical solid on the reflecting layer side (coating layer side) of the reflecting plate of Example 1 A light diffusion adhesive having a thickness of 25 μm composed of silica particles having a diameter of about 4 μm (refractive index of 1.44) as particles (true spherical solid particles having no phase difference) was attached. The degree of depolarization of the light diffusion adhesive was 0.5% or less, and the backscattering rate was 5% or less.
[0045]
The reflection plate with a light diffusing adhesive formed as described above had a diffuse reflectance of about 50%.
[0046]
Furthermore, a reflective polarizing plate could be formed by laminating a polarizing plate EGW1206DU made by Nitto Denko on the reflective plate with the light diffusion adhesive. The formed reflective polarizing plate was found to have good appearance characteristics.
[0047]
(Comparative Example 1)
Silver was vacuum-deposited with a thickness of 0.1 μm on a Nitto Denko polarizing plate SEG1425DU to form a reflective polarizing plate.
[0048]
The reflective layer (deposited film) in the reflective polarizing plate of this comparative example had an extremely low yellowness b value of 7.0 and could not be used for a liquid crystal display device. In addition, it was found that strong curling occurs on the polarizing plate due to thermal shock of vapor deposition, and the plasticizer in the TAC (triacetyl cellulose) film constituting the polarizing plate is deposited on the surface, which causes peeling off of the reflective layer. It was.
[0049]
(Comparative Example 2)
Silver was vacuum-deposited with a thickness of 0.1 μm on a Toray polyethylene terephthalate film (thickness 12 μm) to form a reflector. Next, the highly durable silver reflecting plate obtained by forming a protective layer on the reflecting plate had a thickness of about 13 μm. This highly durable silver reflecting plate was attached to a polarizing plate EGW1205 made by Nitto Denko through a diffusion adhesive (thickness 25 μm) to form a reflective polarizing plate.
[0050]
The reflective polarizing plate of this comparative example formed as described above had an overall thickness of about 190 μm, and on the external appearance, unevenness that was considered to be caused by hot water was observed.
[0051]
【The invention's effect】
As described above, according to the reflector according to the present invention, the substrate can be selected with a high degree of freedom and can be thinned, and the manufacturing cost is relatively low. Moreover, according to the reflective polarizing plate according to the present invention, since the member (for example, a polarizer protective film) constituting the polarizing plate is the base material of the reflective plate, the base material of the reflective plate is separated from the member. There is no need to provide a (support), and in addition to the thickness of the omitted support, the thickness of the reflective polarizing plate can be reduced by the thickness of the adhesive / adhesive between the support and the polarizing plate. It has the excellent advantage of being able to.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a schematic configuration of a reflector according to a first embodiment of the present invention.
FIG. 2 is a longitudinal sectional view showing a schematic configuration of a reflective polarizing plate according to a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Reflecting plate 2 ... Polarizing plate 10 ... Reflective polarizing plate 11 ... Base material 12 ... Reflecting layer

Claims (9)

A reflector comprising a substrate and a reflective layer formed on the substrate,
The reflection layer, wherein the reflection layer is a heat-sintered layer obtained by heat-sintering a coating layer obtained by dispersing and applying metal nanoparticles on the substrate. The reflector according to claim 1, wherein the substrate has a roughened surface on the reflective layer side. The base material has a smooth surface on the reflective layer side,
The light diffusing member that does not substantially have backscattering and does not substantially cancel the polarization state is laminated on a surface of the reflective layer opposite to the substrate side. The reflector according to 1 or 2. The reflector according to claim 1, wherein the substrate has a thickness of 100 μm or less. The metal nanoparticles are any one of or a mixture of silver, gold, copper, nickel, chromium, platinum, palladium, and alloys thereof. Reflector according to any one of the above. The reflection plate according to claim 1, wherein a protective layer for preventing oxidation is formed on at least one surface of the reflection layer. The reflective plate according to claim 6, wherein the surface of the protective layer has a pencil hardness of H or higher. The reflection plate according to claim 6, wherein the surface of the protective layer is subjected to an antistatic treatment having a resistance value of 10 ¹⁰ Ω or less. A reflector according to any one of claims 1 to 8 and a polarizing plate laminated on the reflector,
A reflection type polarizing plate, wherein a member constituting the polarizing plate is a base material of the reflection plate.

Images