JP5695873B2 - Mirror body with transmission function and mirror device with photographing function - Google Patents

Description

  The present invention relates to a mirror body with a transmission function and a mirror device with a photographing function.

  Curtains, white lace curtains, blinds, etc. are installed near the window frame for the purpose of protecting the privacy inside the building. Also known is a mirror glass that forms a thin metal film layer on the surface of a window material and reflects part of the light.

  However, although the mirror glass provides privacy protection under extremely bright light conditions outside the building compared to the inside of the building, under the light conditions where the brightness inside and outside the building is reversed, Has a problem of being visually recognized.

  In order to solve such a problem, by laminating two layers of a light color layer having a high light reflectance and a dark color layer having a low light reflectance on the surface of the window material, the privacy protection function and the inside of the building to the outside of the building can be obtained. A privacy protection window material (Japanese Patent Laid-Open No. 2003-2690) excellent in both visibility has been proposed.

  The privacy protection window material disclosed in Japanese Patent Application Laid-Open No. 2003-2690 is designed so that the visibility from the inside of the building and the visibility from the outside of the building are different by designing the windows so that the light transmittance on both sides of the window material is different. ing. However, depending on the light conditions inside and outside the building, the inside of the building is visually recognized from outside the building, so that the privacy protection effect is not sufficient.

JP 2003-2690 A

  The present invention has been made in view of these disadvantages, and an object of the present invention is to provide a transmission function capable of selecting visibility, such as making it impossible to visually recognize the other side from one side regardless of light conditions. For example, when the mirror body with a transmission function is installed in a window of a building, the visibility between the outside and inside of the building can be selected. Can contribute. It is another object of the present invention to provide a mirror device with a photographing function that can perform photographing by selecting visibility from one side to the other side regardless of light conditions.

The invention made to solve the above problems is
A shutter plate that controls the transmission of light and a half mirror sheet superimposed on the front surface of the shutter plate,
This shutter plate
A pair of transparent substrates disposed opposite to each other;
A pair of transparent electrode layers laminated over a wide area on the inner surface side of the pair of transparent substrates;
A liquid crystal layer filled between the pair of transparent electrode layers and capable of switching between a light transmission state and a shielding state by applying a voltage to the pair of transparent electrode layers;
The half mirror sheet is
A transparent substrate sheet;
It is a mirror body with a transmission function which is laminated | stacked on this base material sheet, and has a metal vapor deposition layer whose OD value is 0.5 or more and 1.09 or less.

  In the mirror body with the transmission function, the transmission state and the shielding state of the liquid crystal layer can be switched by applying a voltage to the pair of transparent electrode layers. When the liquid crystal layer is in a shielded state, light does not pass through the shutter plate, so the front side cannot be seen from the rear side, and light reflected by the half mirror sheet among the light incident from the front side is the front side. The half mirror sheet functions as a mirror. On the other hand, when the liquid crystal layer is in a transmissive state, light is transmitted from the rear surface side to the front surface side and from the front surface side to the rear surface side, so that the rear surface side is visually recognized from the front surface side and the front surface side is visually recognized from the rear surface side. Will be. In particular, since the metal vapor deposition layer of the half mirror sheet has an OD value of 0.5 or more and 1.09 or less, it functions appropriately as a half mirror. That is, since the OD value is not less than the above lower limit value, the half mirror sheet can function properly as a mirror in the shielding state of the liquid crystal layer, while the OD value is not more than the above upper limit value, so that the front side is in the transmission state of the liquid crystal layer. It is easy to visually recognize the rear side and the front side from the rear side.

  In the mirror body with a transmission function, the OD value is preferably 0.55 or more and 1.06 or less, and the above advantages become more remarkable.

  Further, in the mirror body with a transmission function, it is preferable that the transmittance in the transmission state of the shutter plate is 70% or more and 90% or less, and the haze value is 5% or more and 10% or less. A sufficient amount of light can be transmitted through the shutter plate. Further, the mirror with a transmission function preferably has a transmittance in a shielding state of 5% or more and 12% or less and a haze value of 80% or more and 95% or less. Can be appropriately shielded, and the light reflected by the half mirror sheet among the light incident from the front side becomes more visible from the front side.

  In the mirror body with a transmission function, the transparent substrate can be formed from glass, but is preferably formed from a synthetic resin. That is, the synthetic resin substrate is less likely to be damaged than the glass substrate, and is easy to handle during manufacture and use.

  Further, in the mirror body with the transmission function, a camera device is provided on the rear surface side of the mirror body with the transmission function, and the camera device with the imaging function for photographing the transmitted light from the mirror body with the transmission function by the camera. Can be used as

  In the mirror device with a photographing function, the front side can be photographed from the rear side by setting the liquid crystal layer in a transmissive state. For this reason, for example, when the viewer on the front side uses a half mirror sheet as a mirror in the shielded state of the liquid crystal layer, the viewer can be photographed by the camera by switching the liquid crystal layer to the transmissive state. Thus, for example, in a case where a full body image needs to be taken periodically, the subject does not need to move to the front of the photographing device each time, and use a half mirror sheet as a mirror. The above shooting can be performed while

  Further, in the mirror device with an imaging function, the mirror body with the transmission function has a transmission changeover switch unit that controls application of a voltage to the liquid crystal layer, and the camera controls imaging start. It is preferable to employ a configuration in which switch means is provided and the transmission switching switch means and the photographing switch means are controlled so as to be synchronized. Thereby, when the liquid crystal layer is brought into the transmissive state by the transmission changeover switch means, the photographing by the photographing switch means can be performed.

  In the present invention, the “wide region” where the transparent electrode layer is formed includes not only the case where the transparent electrode layer is formed over substantially the entire area of the transparent substrate, but also only the region requiring light transmission. It is. That is, for example, when used in the above-described mirror device with a photographing function, the case where the transparent electrode layer is formed only in the viewing angle (photographing range) of the camera is within the range intended by the present invention.

The “OD value” is a numerical value represented by the formula (1).
D = −log (I / I ₀ ) (1)
Here, D is the OD value, I is the intensity of incident light, and I ₀ is the intensity of transmitted light.

  As described above, according to the mirror body with a transmission function of the present invention, it is possible to select the visibility, such as making the other side invisible from one side regardless of the light conditions.

It is a schematic sectional drawing of the mirror body with a transmission function of one Embodiment of this invention. It is a schematic explanatory drawing of the mirror apparatus with an imaging | photography function provided with the mirror body with a transmission function of FIG.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings as appropriate.

  The mirror body 1 with a transmission function of the present embodiment includes a shutter plate 2 that controls transmission of light, and a half mirror sheet 8 that is superimposed on the front surface of the shutter plate 2.

  The shutter plate 2 is filled between a pair of transparent substrates 3 opposed to each other, a pair of transparent electrode layers 5 laminated on the inner surface side of the pair of transparent substrates 3, and the pair of transparent electrode layers 5. The liquid crystal layer 7 is provided.

  The said transparent substrate 3 is formed from a synthetic resin, and is specifically comprised from the synthetic resin sheet | seat. In addition, the material of the transparent substrate 3 is not particularly limited, but a material having transparency at least in the visible light region and capable of forming a thin film on the surface without hindrance is preferable. In addition, since the transparent substrate 3 is formed from a synthetic resin, it has an advantage that it is easy to handle as compared with, for example, a glass, and the thermal conductivity of the synthetic resin is low. When used for windows, phenomena such as condensation and cloudiness caused by temperature differences between inside and outside the building can be prevented. It should be noted that the pair of transparent substrates 3 can be appropriately changed in design from the same material or different materials.

  Examples of the synthetic resin sheet include polyethylene terephthalate, polycarbonate, polymethyl methacrylate, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, polystyrene, polyimide, polyamide, polybutylene terephthalate, polyethylene naphthalate, polysulfone, poly Examples include ether sulfone, polyether ether ketone, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, triacetyl cellulose, polyurethane, and cycloolefin polymer. These may be used alone or in combination of two or more. In addition, the use of two or more layers is also a matter that can be appropriately changed in design.

  Of the materials listed above, polyethylene terephthalate, polycarbonate, polymethyl methacrylate, cycloolefin polymer, and the like are preferably employed from the viewpoint of excellent transparency, durability, workability, and the like.

  The thickness of the transparent substrate 3 can be appropriately designed and polarized in consideration of the application, optical characteristics, durability and the like of the mirror body 1 with a transmission function. The thickness of the transparent substrate 3 is preferably 10 μm or more, more preferably 25 μm or more, and even more preferably 50 μm or more from the viewpoint of ease of handling, strength, and the like. On the other hand, the transparent substrate 3 is preferably 1 mm or less, more preferably 500 μm or less, and even more preferably 250 μm or less from the viewpoints of transparency and economy.

  The transparent electrode layer 5 is formed over a wide area in the plane direction of the transparent substrate 3, specifically, is formed over substantially the entire surface of the transparent substrate 3. Here, one transparent electrode layer 5 is formed on one transparent substrate 3. A plurality of transparent electrode layers 5 can be formed on one transparent substrate 3.

  The transparent electrode layer 5 preferably has a thickness of 50 nm to 200 nm, more preferably 100 nm to 200 nm.

  Here, the method for forming the transparent electrode layer 5 is not particularly limited. For example, physical vapor deposition (PVD) such as vacuum deposition, sputtering, ion plating, MBE, laser ablation, etc., thermal Examples include a vapor phase method such as a chemical vapor deposition method (CVD) such as a CVD method and a plasma CVD method. Each metal thin film in the laminated structure may be formed using any one of these methods, or may be formed using two or more methods.

  More specifically, when the vacuum deposition method is used, a desired material may be used as an evaporation source, and the transparent electrode layer 5 may be formed by heat vapor deposition of the material by resistance heating, laser heating, electron beam heating, or the like. . In the case of using a sputtering method, a desired material is used as a target, an inert gas such as argon or neon is used as a sputtering gas, and a direct current (DC) voltage (DC sputtering method) is used between the target and the transparent film. ) Or a radio frequency (RF) voltage (RF sputtering method) may be applied to form the transparent electrode layer 5. From the viewpoint of increasing the deposition rate, a direct current magnetron sputtering method or a high frequency magnetron sputtering method may be used. In addition, when using the ion plating method, using a desired material as an evaporation source, a low-pressure gas is introduced into the vacuum evaporation system, an electric field is applied to generate plasma, and the evaporated particles from the evaporation source are ionized. The transparent electrode layer 5 can be formed by vapor deposition.

The transparent electrode layer 5 can be formed from a metal oxide (ITO) made of a mixture of indium oxide and tin oxide, and for example, tin oxide (SnO ₂ ), zinc oxide (ZnO), cadmium oxide (CdO) It is also possible to form a metal oxide (IZO) made of a mixture of indium oxide and zinc oxide, a metal oxide (AZO) made of a mixture of aluminum oxide and zinc oxide, or the like.

  The ratio of indium oxide to tin oxide in the metal oxide (ITO) composed of a mixture of indium oxide and tin oxide is preferably 80% by weight or more of indium oxide and 20% by weight or less of tin oxide, particularly 90% by weight or more of indium oxide. It is preferably 95% by weight or less and tin oxide 5% by weight or more and 10% by weight or less.

  For the transparent electrode layer 5, a transparent conductive film can be formed on the transparent substrate 3 by a known method such as vapor deposition, sputtering, PECVD, CatCVD, coating, or laminating.

  In addition, a transparent barrier film (not shown) is preferably provided between the transparent substrate 3 and the transparent electrode layer 5, whereby the shutter plate 2 having excellent moisture permeability can be obtained.

  This transparent barrier film can be, for example, an inorganic film or an organic film. Examples of the inorganic film include metal oxides such as silicon oxide, aluminum oxide, and tantalum oxide; metal nitrides such as silicon nitride, aluminum nitride, and tantalum nitride; metal nitrides such as silicon nitride oxide, aluminum nitride oxide, and tantalum nitride oxide. Examples thereof include an oxide film and an aluminum film. Moreover, as an organic film, the film | membrane etc. which consist of polyvinyl alcohol, polyolefin etc. are mentioned, for example. Among these, inorganic films are preferable, and films made of metal oxides, metal nitrides, and metal nitride oxides are particularly preferable.

  The liquid crystal layer 7 includes a liquid crystal material filled between the pair of transparent electrode layers 5. In the present embodiment, the liquid crystal layer 7 is in a transmissive state that transmits light when a voltage is applied between the pair of transparent electrode layers 5, and is in a shielding state that is in a cloudy state that does not transmit light unless a voltage is applied. It is provided to be.

  As the liquid crystal material, for example, nematic liquid crystal, cholesteric liquid crystal, smectic liquid crystal, ferroelectric liquid crystal, or the like can be used. Among the enumerated above, nematic liquid crystal molecules are selected from the viewpoint that the liquid crystal temperature range is wide, the viscosity is low, the operating temperature range of the liquid crystal element is wide, and the operating speed can be increased compared to other liquid crystal materials. It is preferable to use it. In addition to the case where the above liquid crystal material is used alone, two or more kinds can be used in combination.

  Examples of nematic liquid crystal molecules include polymer liquid crystal compounds such as poly (p-phenylene terephthalamide), poly (p-benzamide), poly (p-phenylenebenzobisoxazole), and poly (p-phenylenebenzobisthiazole). Examples include 4'-methoxybenzylidene-4'butylaniline, 4-cyano-4'-hexoxybiphenyl, a cyanobiphenyl compound, a cyanophenylcyclohexane compound, and a cyanocyclohexylcyclohexane compound. Examples of cholesteric liquid crystal molecules include cholesteryl linoleate, cholesteryl oleate, cellulose, cellulose derivatives, and polypeptides. Furthermore, examples of the smectic liquid crystal molecule include polyester.

  The liquid crystal layer 7 can also contain a polymer for maintaining the liquid crystal material. The polymer is not particularly limited as long as it has transparency and does not adversely affect the alignment of liquid crystal molecules. For example, vinyl ether acrylate, a copolymer of vinyl ether acrylate and another monomer, or the like can be used as the polymer. These may be used alone or in combination of two or more. Of these, vinyl ether acrylate copolymers are preferred from the viewpoints of excellent transparency and good relationship with the refractive index with liquid crystal molecules.

  Further, the mixing ratio of the liquid crystal molecules and the polymer is not particularly limited, and the ratio can be appropriately selected. The mixing ratio of the liquid crystal molecules and the polymer is 50% by mass to 90% by mass of the liquid crystal molecules. Below, it is preferable that a polymer is 10 mass% or more and 50 mass% or less.

  It should be noted that the liquid crystal layer 7 may contain additives such as an ultraviolet absorber and an antioxidant as necessary as long as the object of the present invention is not impaired.

  The thickness of the liquid crystal layer 7 (distance between the pair of transparent electrodes 5) is preferably 3 μm or more, more preferably 5 μm or more, and further preferably 7 μm or more, whereby light can be appropriately shielded in a shielded state. Further, the thickness of the liquid crystal layer 7 is preferably 100 μm or less, more preferably 50 μm or less, and further preferably 30 μm or less, which is excellent in economic efficiency and can appropriately transmit light in a transmissive state.

  Further, the shutter plate 2 has a transmittance in a transmissive state of 70% or more and 90% or less, and more preferably 75% or more and 85% or less. Further, the shutter plate 2 has a Haze value in the transmission state of 5% or more and 10% or less, and more preferably 6% or more and 9% or less. Thereby, a sufficient amount of light can be transmitted through the shutter plate 2 in the transmission state of the liquid crystal layer 7.

  Moreover, the shutter plate 2 has a transmittance in a shielded state of 5% or more and 12% or less, and more preferably 7% or more and less than 10%. Further, the shutter plate 2 has a haze value in a shielded state of 80% to 95%, and more preferably 85% to 90%. Thereby, the light can be appropriately shielded by the shutter plate 2 in the shielding state of the liquid crystal layer 7.

  Further, the mirror 1 with the transmission function supplies voltage applied to the pair of transparent electrode layers 5 (not shown), and the voltage supplied to the transparent electrode layer 5 is turned on / off. And a transmission changeover switch means 11 to be controlled. Specifically, the voltage supply means includes a converter circuit that is connected to a household AC power source and converts an AC power source supplied from the household AC power source into a DC power source. The transmission changeover switch means 11 includes a switch circuit that is arranged between the converter circuit and the transparent electrode layer 5 and controls the voltage application state of the transparent electrode layer 5. In the case where a plurality of transparent electrode layers 5 are formed on one transparent substrate 3 as described above, the voltage supply means and the transmission changeover switch means 11 include a plurality of the plurality of transparent electrode layers 5 formed on one transparent electrode 3. It is preferable to apply the same polarity voltage to the transparent electrode layer 5 at the same timing.

  The half mirror sheet 8 includes a transparent base sheet 9 and a metal vapor deposition layer 10 laminated on the base sheet 9. The metal deposition layer 10 is formed with a thickness that does not cause total reflection and reflects a part of light, and the half mirror sheet 8 reflects a part of incident light and transmits a part thereof. Functions as a semi-transparent mirror made in

  The base sheet 9 is composed of a synthetic resin sheet. In addition, although the material of the base material sheet 9 is not specifically limited, What has transparency at least in visible region is preferable. In addition, since the base sheet 9 is formed from a synthetic resin, it has an advantage that it is easy to handle as compared with, for example, one formed from glass, and the thermal conductivity of the synthetic resin is low. When it is used for windows, it is possible to prevent phenomena such as condensation and cloudiness caused by a temperature difference between inside and outside the building.

  Examples of the synthetic resin sheet include polyethylene terephthalate, polycarbonate, polymethyl methacrylate, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, polystyrene, polyimide, polyamide, polybutylene terephthalate, polyethylene naphthalate, polysulfone, poly Examples include ether sulfone, polyether ether ketone, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, triacetyl cellulose, polyurethane, and cycloolefin polymer. These may be used alone or in combination of two or more. In addition, the use of two or more layers is also a matter that can be appropriately changed in design.

  Of the materials listed above, polyethylene terephthalate, polycarbonate, polymethyl methacrylate, cycloolefin polymer, and the like are preferably employed from the viewpoint of excellent transparency, durability, workability, and the like.

  The thickness of the base sheet 9 can be appropriately designed and polarized in consideration of the application, optical characteristics, durability, and the like of the mirror body 1 with a transmission function. The thickness of the base sheet 9 is preferably 10 μm or more, more preferably 25 μm or more, and even more preferably 50 μm or more from the viewpoint of ease of handling, strength, and the like. On the other hand, the base sheet 9 is preferably 1 mm or less, more preferably 500 μm or less, and even more preferably 250 μm or less from the viewpoints of transparency, economy, and the like.

  The metal vapor deposition layer 10 is laminated on the rear surface of the base sheet 9. In the present invention, the base sheet 9 for forming the metal vapor deposition layer 10 and one transparent substrate 3 of the pair of transparent substrates 3 are composed of one member, that is, specifically, the transparent substrate 3 on the front side. It is also possible to form the metal vapor deposition layer 10 on the front surface, but it is preferable that the base sheet 9 on which the metal vapor deposition layer 10 is formed is provided separately from the pair of transparent substrates 3. Thereby, the mirror body 1 with the transmission function can be easily manufactured.

  The thickness of the metal vapor deposition layer 10 can be 0.001 μm or more and 1 μm or less, and preferably 0.01 μm or more and 0.1 μm or less.

  The metal vapor deposition layer 10 has an OD value of 0.5 or more and 1.09 or less, and more preferably 0.55 or more and 1.06 or less. Since the OD value is not less than the above lower limit value, the half mirror sheet 8 can function properly as a mirror in the shielding state of the liquid crystal layer 7, while the OD value is not more than the above upper limit value, so that the front surface in the transmission state of the liquid crystal layer 7 can be achieved. It is easy to visually recognize the rear side from the side and the front side from the rear side.

The OD value is a numerical value representing the light transmittance, and is a numerical value represented by the formula (1).
D = −log (I / I ₀ ) (1)
Here, D is the OD value, I is the intensity of incident light incident on the half mirror sheet 8, and I ₀ is the intensity of transmitted light transmitted from the half mirror sheet 8.

  Moreover, the said metal vapor deposition layer 10 is provided with a reflectance of 68.37% or more and 91.87% or less, More preferably, it is 71.8% or more and 91.3% or less. Since the reflectance is not less than the above lower limit value, the half mirror sheet 8 can function properly as a mirror in the shielding state of the liquid crystal layer 7, while the reflectance is not more than the above upper limit value, so that the front side in the transmission state of the liquid crystal layer 7 can be achieved. It is easy to visually recognize the rear side and the front side from the rear side.

The reflectance is a numerical value represented by the formula (2).
R = (1−I ₀ / I) × 100 (2)
Here, R is the reflectance, I is the intensity of the incident light, and I ₀ is the intensity of the transmitted light.

  The metal deposition layer 10 is formed by depositing a thin film on the base sheet 9. This metal vapor deposition layer 10 can be formed not only by vacuum vapor deposition but also by sputtering. As a material of the metal vapor deposition layer 10, a metal, an alloy, a nonmetal, an oxide or a fluoride thereof can be employed. Specific examples include simple metals such as gold, silver, zinc, aluminum, copper, nickel, chromium, iron, titanium, and zirconium, alloys and oxides thereof. These may be used alone or in combination of two or more.

  The mirror body 1 with a transmission function of the present embodiment has the above-described configuration, and can be used by being installed, for example, in a window of a building, or can be used for a mirror apparatus with a photographing function.

  First, the case where the mirror body 1 with the transmission function is installed in a window of a building will be described. In this installation, the mirror body with transmission function 1 is installed so that the front side faces indoors and the rear side faces outdoors.

  In the mirror body 1 with the transmission function, the transmission state and the shielding state of the liquid crystal layer 7 can be switched by applying a voltage to the pair of transparent electrode layers 5. For this reason, when the liquid crystal layer 7 is in a shielding state, light does not pass through the shutter plate 2, so light does not pass from indoors to the outdoors, and the indoors cannot be viewed from the outdoors. Thereby, the privacy protection effect is exhibited. Moreover, in this shielding state, the light reflected by the half mirror sheet 8 among the light incident from the indoors is easily visible from the indoor. That is, since the light from the outside is blocked by the shutter plate 2, the reflected light is easily visible, and the half mirror sheet 8 can function as a mirror. On the other hand, when the liquid crystal layer 7 is in a transmissive state, light is transmitted from indoor to outdoor and from outdoor to indoor, so that the outdoor is visually recognized from the indoor according to the light conditions, and the indoor is visually recognized from the outdoor.

  In particular, when installed in a building window as described above, the mirror body 1 with a transmission function further includes, for example, a neutral gray layer, an ultraviolet absorption layer, an ultraviolet scattering layer, a light diffusion layer, a protective film, and the like. It is possible to provide.

  Specifically, the neutral gray layer is a layer having no hue or saturation. By providing this neutral gray layer, a viewer looking from the inside to the outside of the building can directly observe the color information on the outside without feeling dazzling or glare, and has the effect of making the color information stand out. Furthermore, when a neutral gray layer is provided on the back side of the light reflecting layer, the half mirror effect can be further enhanced. This neutral gray layer can disperse a black pigment that evenly absorbs wavelengths in the visible light region of 350 nm or more and 700 nm or less in the binder, and can be superimposed on the rear surface of the shutter plate 2, for example. Further, the transmittance of the neutral gray layer in the visible light region is preferably 20% or more and 90% or less, and more preferably 40% or more and 80% or less. Examples of the polymer used for the binder of the neutral gray layer include acrylic resins, polyurethanes, polyesters, fluorine resins, silicone resins, polyamideimides, and epoxy resins. In the binder, an optional additive may be blended in addition to the polymer.

  By providing the ultraviolet absorbing layer or the ultraviolet scattering layer, deterioration such as white turbidity due to ultraviolet rays can be prevented. As a result, visibility from indoor to outdoor can be maintained for a long time.

  Moreover, the mirror apparatus with an imaging | photography function can be comprised using the said mirror body 1 with a transmission function. Specifically, as shown in FIG. 2, the mirror device with a photographing function is disposed on the rear surface side of the mirror body 1 with a transmission function and the mirror body 1 with the transmission function, and the mirror body 1 with a transmission function. And a camera 13 capable of photographing the transmitted light from the camera. The camera 13 has photographing switch means 15 that controls the start of photographing. The photographing switch means 15 is controlled so as to be synchronized with the transmission changeover switch means 11 of the mirror body 1 with the transmission function. Specifically, the camera 13 has an operation unit (not shown) for instructing the photographing switch unit 15 to start photographing, and the photographing switch unit 15 performs photographing by the camera 13 by operating this operation unit. It is provided to start. The photographing switch means 15 is connected to a control means (not shown) that can be configured by a control circuit or the like, and this control means is connected to the transmission changeover switch means 11. The photographing switch means 15 transmits a signal related to the photographing start to the control means when photographing by the camera 13 is started, and the transmission changeover switch means so that the control means that receives the signal sets the liquid crystal layer 7 in the transmissive state. 11 is controlled. The synchronization method is not limited to the above-described method, and various methods can be employed. In addition, the mirror device with a photographing function is provided with a sensor such as an infrared sensor without providing the operation unit, and a range of a predetermined distance from the mirror body 1 with the transmission function on the front side of the mirror body with the transmission function by the sensor. When it is detected that a person is present for a predetermined time or longer, the transmission switching switch means 11 and the imaging switch means 15 are synchronized so as to start imaging and switch to the transmission state of the liquid crystal layer 7. Is also possible.

  In the mirror device with a photographing function, the front side can be photographed by the camera 13 by setting the transmission state of the liquid crystal layer 7. For this reason, for example, the viewer on the front side in the shielding state of the liquid crystal layer 7. However, when the half mirror sheet 8 is used as a mirror, the liquid crystal layer 7 can be switched to the transmissive state for a moment, and the viewer can be photographed by the camera 13. Thereby, for example, in a case where it is necessary to periodically take a whole body image, the subject does not need to move to the front of the photographing device each time and photograph the half mirror sheet 8 as a mirror. The above shooting can be performed while using.

  Note that the present invention is not limited to the configuration of the above-described embodiment, and can be appropriately modified within the scope intended by the present invention.

  For example, in the above embodiment, the front surface of the shutter plate 2 and the rear surface of the half mirror sheet 8 are overlapped with each other with a slight gap as shown in FIG. Is also a matter that can be appropriately changed in design. In particular, it is preferable that the front surface of the shutter and the rear surface of the half mirror sheet are laminated and pasted via a transparent medium such as an adhesive, whereby the light transmittance can be improved.

  Table 1 shows the results of confirming the function as a half mirror by changing the OD value of the metal vapor deposition layer in the mirror body with the transmission function.

  As is clear from this result, when the OD value is 0.5 or more and 1.09 or less, the function as a half mirror can be achieved, and when the OD value is 0.55 or more and 1.06 or less, the function as a half mirror is achieved. Function improves more.

  It is an object of the present invention to provide a mirror body with a transmission function that can select visibility, such as making it impossible to visually recognize one side from the other side regardless of light conditions. For example, it can be installed in a window of a building or used for a mirror device with a photographing function.

DESCRIPTION OF SYMBOLS 1 Mirror body with a transmission function 2 Shutter board 3 Transparent substrate 5 Transparent electrode layer 7 Liquid crystal layer 8 Half mirror sheet 9 Base material sheet 10 Metal vapor deposition layer

Claims (3)

A mirror body with a transmission function, and a camera that is disposed on the rear surface side of the mirror body with the transmission function and that can photograph the transmitted light from the mirror body with the transmission function,
The transmission-equipped mirror body includes a shutter plate that controls transmission of light and a half mirror sheet that is superimposed on the front surface of the shutter plate.
This shutter plate
A pair of transparent substrates disposed opposite to each other;
A pair of transparent electrode layers laminated over a wide area on the inner surface side of the pair of transparent substrates;
A liquid crystal layer filled between the pair of transparent electrode layers and capable of switching between a light transmission state and a shielding state by applying a voltage to the pair of transparent electrode layers;
The half mirror sheet is
A transparent substrate sheet;
Laminated on this base sheet, and having a metal vapor deposition layer having an OD value of 0.55 or more and 1.06 or less and a thickness of 0.01 μm or more ,
The mirror body with a transmission function has a transmission changeover switch means for controlling application of a voltage to the liquid crystal layer,
The camera has shooting switch means for controlling the start of shooting,
And further comprising a sensor, and when the sensor senses that a person is present on the front side of the mirror body with a transmission function and within a predetermined distance from the mirror body with the transmission function, A mirror device with a photographing function that switches a liquid crystal layer to a transmissive state and starts photographing in synchronization with a photographing switch means. The transmittance of the shutter plate in the transmission state is 70% to 90%, the haze value is 5% to 10%, the transmittance in the shielding state is 5% to 12%, and the haze value is 80% to 95%. The mirror device with a photographing function according to claim 1 . The mirror device with a photographing function according to claim 1 or 2 , wherein the transparent substrate is formed of a synthetic resin.

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