JP2017001649A - Movable door device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a movable door device capable of displaying an image on a door panel without intercepting the image light by a person and an object, and capable of also visually confirming a scene on the opposite side of the door panel through the door panel.SOLUTION: A movable door device (a platform door device 1) comprises a door panel 50 having a transparent screen 10 being 10-90% in the sum total of a haze and diffuse reflectance and being 10-90% in the total light transmittance, a door pocket 60 capable of storing the door panel 50, a driving device for advancing and storing the door panel 50 from a side end opening 62 of the door pocket 60 and a projector 80 installed in a position adjacent to the door pocket 60 and in a position at which the image light can be projected on the transparent screen 10 of the door panel 50 advanced from the door pocket 60.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a movable door device.

In order to prevent a person from falling from the platform and contact between the train and the person, a movable platform door device is installed along the edge of the platform.
As a home door device, for example, a device including a door panel having a transparent window, a door pocket that can store the door panel, and a drive device that advances and stores the door panel from an opening at a side end of the door bag is known.
As a platform door device, a platform door device has been proposed in which a display body such as a light emitting diode is attached to a door panel so that passengers on the platform can visually recognize the operation status of the platform door (Patent Document 1). .

JP 2007-45347 A

  However, the platform door device of Patent Document 1 has a problem that the display body attached to the door panel is opaque, so that the situation on the track side cannot be visually recognized from the platform side through the door panel.

  The present invention provides a movable door device that can display an image on a door panel without the image light being blocked by a person or an object, and can visually recognize a scene on the other side of the door panel through the door panel.

The present invention has the following aspects.
[1] A door panel having a transparent screen having a sum of haze and diffuse reflectance of 10 to 90% and a total light transmittance of 10 to 90%; a door pocket capable of storing the door panel; A drive device for advancing and storing the door panel from the opening at the side end; and a position within the door pocket and capable of projecting image light onto the transparent screen of the door panel advanced from the door pocket, or adjacent to the door pocket And a projector installed at a position where the image light can be projected onto the transparent screen of the door panel advanced from the door pocket.
[2] The movable door device according to [1], wherein the projector is a short focus projector.
[3] The movable door device according to [1] or [2], wherein the transparent screen is a transmissive transparent screen having a light scattering layer including a transparent resin and a light scattering material.
[4] The movable door device according to [3], wherein the light scattering material is a particle having a refractive index different from the refractive index of the transparent resin by 0.15 or more.
[5] The movable door device according to [3] or [4], wherein the light scattering material is an isotropic scattering fine particle having an average primary particle diameter of 10 to 100 nm.
[6] The movable door device according to any one of [1] to [5], wherein the transparent screen includes a low reflection layer on a surface on which the image light is projected.
[7] The movable device according to any one of [1] to [6], wherein the projector projects a video light having a p-polarized component larger than an s-polarized component on the surface of the transparent screen. Door device.
[8] The movable door device according to any one of [1] to [7], which is a home door device installed on the platform.

  The movable door device of the present invention can display an image on the door panel without the image light being blocked by a person or an object, and can visually recognize the scene on the other side of the door panel through the door panel.

It is the perspective view seen from the track side which shows an example of the platform door apparatus which is a movable door apparatus of this invention. It is a top view which shows the positional relationship of the projector and transparent screen in the platform door apparatus of FIG. It is a layer block diagram which shows an example of a transmissive transparent screen. It is a layer block diagram which shows the other example of a transmissive transparent screen. It is a layer block diagram which shows an example of a reflection type transparent screen. It is a transmission spectrum of the glass plate of Example 7. It is a transmission spectrum of the glass plate with a low reflection layer of Example 8.

The following definitions of terms apply throughout this specification and the claims.
The “first surface” means the outermost surface of the transparent screen and the surface on the side where image light is projected from the projector.
The “second surface” means the outermost surface of the transparent screen and the surface opposite to the first surface.
The “scene on the first surface side (second surface side)” is an image that appears on the other side of the transparent screen as viewed from the observer on the second surface side (first surface side) of the transparent screen. Means. The scene does not include an image in which image light projected from the projector is imaged and displayed on a transparent screen.
“Haze” is a forward scattering of transmitted light that is incident from the first surface side (or the second surface side) of the transparent screen and transmitted to the second surface side (or the first surface side). , Which means the percentage of transmitted light that deviates 0.044 rad (2.5 °) or more from incident light. That is, it is a normal haze measured by the method described in JIS K 7136: 2000 (ISO 14782: 1999).
“Diffuse reflectance” is reflected from the first surface side (or second surface side) of incident light incident at an incident angle of 0 ° from the first surface side (or second surface side) of the transparent screen. The ratio (percentage) of reflected light deviating 0.044 rad (2.5 °) or more from the regular reflected light. When the diffuse reflectance is measured, light is transmitted from the second surface side (or the first surface side) opposite to the first surface side (or the second surface side) to be measured to the transparent screen. Put a black curtain on the opposite side so that it does not enter. In addition, an aperture having the same diameter as the incident light is set in close contact with the object to be measured.
The “total light transmittance” is the second surface side (or first surface side) with respect to incident light incident at an incident angle of 0 ° from the first surface side (or second surface side) of the transparent screen. It means the ratio (percentage) of the total transmitted light. That is, it is a normal total light transmittance measured by the method described in JIS K 7361: 1997 (ISO 13468-1: 1996).
The “incident angle” is an angle formed by the incident direction of light and the normal line of the surface of the transparent screen.
The haze and total light transmittance are values when measured using a haze meter compliant with the above JIS standard, and the diffuse reflectance is a value when measured at room temperature using a D65 light source. Is a value when measured at room temperature using d-line (wavelength 589 nm) of a sodium lamp.
The “low reflection layer” means a three-dimensional shape or a layer configuration for reducing light reflection.
“Uneven structure” means a plurality of protrusions, a plurality of recesses, or an uneven shape composed of a plurality of protrusions and recesses.
The “irregular concavo-convex structure” means a concavo-convex structure in which convex portions or concave portions do not appear periodically and the sizes of the convex portions or concave portions are irregular.
“Fine concavo-convex structure” means a concavo-convex structure in which the average interval between convex portions or concave portions is equal to or less than the wavelength of visible light.
The “sheet” may be a sheet or a continuous belt.
“Arithmetic average roughness (Ra)” is an arithmetic average roughness measured based on JIS B 0601: 2013 (ISO 4287: 1997, Amd. 1: 2009). The reference length lr (cut-off value λc) for the roughness curve was 0.8 mm.

<Moveable door device>
A movable door device according to the present invention includes a door panel having a transparent screen having a sum of haze and diffuse reflectance of 10 to 90% and a total light transmittance of 10 to 90%; a door pocket capable of storing the door panel; A drive device for advancing and storing the door panel from the opening at the side edge of the door pocket; a position in the door pocket where the image light can be projected onto the transparent screen of the door panel advanced from the door pocket, or a position adjacent to the door pocket. And a projector installed at a position where image light can be projected onto the transparent screen of the door panel that has advanced from the door pocket.

  The movable door device includes a movable home door device arranged along the edge of the platform; a movable door device installed at an elevator landing; a movable door device installed at an entrance of a building, and the like. Can be mentioned.

When displaying the image from the projector on the transparent screen of the door panel, if the projector is installed at a position where the image light projected from the projector is at substantially the same angle with respect to the transparent screen, It is necessary to install the projector at a certain distance and a certain angle. However, in the case of a device such as a movable door device through which people and objects enter and exit, it is required to install the projector at a position where they do not hinder video display. The movable door device of the present invention can display an image on the transparent screen of the door panel without installing the projector in the door pocket or at a position adjacent to the door pocket, without blocking the image light by a person or an object. However, since image light is projected from the projector at a short distance and a wide range of angles with respect to the transparent screen, the resolution and visibility of the image displayed on the transparent screen are affected. The present inventors have found that the above-mentioned influence can be solved by setting the sum of the haze and the diffuse reflectance to 10 to 90% and the total light transmittance to 10 to 90%.
Hereinafter, the movable door device will be described in detail by taking the home door device as an example.

<Home door device>
FIG. 1 is a perspective view of an example of a home door device that is a movable door device according to the present invention as seen from the track side. FIG. 2 shows the positional relationship between a projector and a transparent screen in the home door device of FIG. FIG.

  FIG. 1 shows a set of home door sets including two home door devices 1. In the home door set, the two home door devices 1 are arranged symmetrically so as to contact each other when the door panel 50 advances from each home door device 1. In a platform (not shown), a plurality of home door sets are arranged in a row along the edge of the platform.

  The home door apparatus 1 includes a door panel 50 having a transparent screen 10; a door pocket 60 that can store the door panel 50; a drive device that is provided in the door pocket 60 and advances and stores the door panel 50 from an opening 62 at a side end of the door pocket 60. (Not shown in the figure); a protective column 70 erected so as to protrude from the portion near the side edge on the opening 62 side of the track side surface of the door pocket 60; A projector 80 provided and capable of projecting image light to the transparent screen 10 of the door panel 50 that has advanced from the door pocket 60 through the opening 72 of the protective column 70; a projector control device (not shown) that controls the projector 80; A position sensor (not shown) for detecting the position of 50; and a door control device (not shown) for controlling the operation of the platform door device 1.

  The transparent screen 10 can be installed on a normal platform door device without problems such as an increase in mass, and thereby the effects of the present invention can be obtained. Therefore, about each part of the platform door apparatus 1, especially the protection support | pillar 70, a position sensor, and a door control apparatus, what is used for a normal platform door apparatus can be used as it is.

(Door panel)
The door panel 50 includes a plate-like transparent screen 10 that is a window, and a frame 52 that is supported so as to surround the transparent screen 10. Details of the transparent screen 10 will be described later.

(Door pocket)
The door pocket 60 has a space for accommodating the door panel 50 therein, and a housing 64 having an opening 62 formed at a side end thereof; the door panel 50 provided in the housing 64 so that the door panel 50 can slide smoothly. And a support (not shown) for supporting. Examples of the support include a guide roller and a guide rail.

(Driver)
The drive device is not particularly limited as long as it is a device that can advance and store the door panel 50 from the opening 62 at the side end of the door pocket 60.
Examples of the driving device include the following.
-An electric motor (AC servo motor, etc.); a screw member made of a ball screw connected to the electric motor and driven to rotate by the electric motor; and fixed to the door panel 50 and screwed to be relatively rotatable with the screw member The drive device provided with the nut member to perform.
A driving device comprising: an electric motor; a gear connected to the electric motor and driven to rotate by the electric motor; and a toothed belt fixed at both ends to the door panel 50 and meshing with the gear near the center.
An electric motor; a gear (sprocket) mounted on each of a plurality of guide rollers that support the door panel 50; and an endless chain that spans the gear and interlocks each guide roller with the rotational drive of the electric motor Drive device.

(Projector)
The projector 80 only needs to be capable of projecting the image light L onto the transparent screen 10. Examples of the projector 80 include a known projector. The projector can project the image light L from a close distance of 10 to 90 cm and can project the image light L with a large incident angle, so that it can correspond to the projection from the protective column 70, and as a result. From the viewpoint of saving the space of the platform door device 1, a short focus projector is preferable, and a short focus projector having a divergence angle of 45 ° or more is particularly preferable.

The maximum projection angle of projector 80 (maximum incident angle of image light L onto transparent screen 10) is preferably 45 ° or more, more preferably 60 ° or more, from the viewpoint of increasing the area onto which image light L can be projected. More preferably, it is not less than °.
The depth of focus of the projector 80 is preferably deeper, preferably 1 mm or more, and more preferably 5 mm or more in terms of the accuracy of mounting the projector 80 to the protective column 70, the displacement of the door panel 50, the manufacturing error of the door panel 50, and the like. 10 mm or more is more preferable.

  As the projector 80, a projector that projects the image light L in which the p-polarized component is larger than the s-polarized component is more preferable. When the incident angle of the image light L to the transparent screen 10 is gradually increased from 0 degree, the reflectance of p-polarized light first decreases, becomes 0 at a certain angle (Brewster angle), and then increases. The reflectance of s-polarized light increases monotonously. Therefore, by projecting the image light L in which the p-polarized component is larger than the s-polarized component, reflection on the surface of the transparent screen 10 is suppressed even for the image light L having a large incident angle. As a result, a decrease in transmittance can be suppressed and screen gain can be further secured.

When the incident angle is large, the effect of suppressing reflection on the surface of the transparent screen 10 is higher when the p-polarized component is larger. Therefore, it is preferable that the following equation is satisfied when the coordinate of the transparent screen is x, the absolute value of the incident angle of the coordinate x is θ (x), and the p-polarized component of the coordinate x is S (x).
Σxθ (x) × S (x)> Σxθ (x) × 0.5
However, S (x) is the quantity of p-polarized light / total quantity of light at the coordinate x, and is in the range of 1 ≧ S ≧ 0.

The size of the projector 80 is preferably within 30 cm, more preferably within 20 cm, and even more preferably within 15 cm in the direction orthogonal to the track-side surface of the door pocket 60 from the viewpoint of space saving of the platform door device 1.
The light exit port of the projector 80 is preferably a transparent member subjected to antifouling treatment, and more preferably glass subjected to antifouling treatment from the viewpoint that water and dirt are difficult to adhere to and easily wipe off water and dirt.
The optical member closest to the exit port of the projector 80 or the second closest optical member is preferably a mirror from the viewpoint of space saving, and a mirror having a curved surface from the viewpoint that the degree of freedom of the optical system can be increased. Is more preferable.

(Projector control device)
The installation location of the projector control device is not particularly limited. The projector control device is provided in the protective column 70, for example.
The projector control device only needs to be capable of generating a video signal and starting or stopping the transmission of the video signal to the projector 80 according to the advancement or storage of the door panel 50.

The projector control device includes, for example, a control unit, a video signal generation unit, an interface unit, and a storage unit.
The interface unit electrically connects the projector 80, the door control device, the position sensor, and the like to the control unit, the video signal generation unit, and the like.
The storage unit stores video signal data, setting conditions, and the like.
The video signal generation unit generates a video signal based on the position information of the train from the door control device, the position information of the door panel 50 from the position sensor, the video signal data stored in the storage unit, the setting conditions, and the like. .
The control unit starts or stops transmission of the video signal to the projector 80 based on the position information of the door panel 50 from the position sensor.

<Transparent transparent screen>
In the platform door device 1 of FIG. 1, the image light L projected from the projector 80 provided on the track side with respect to the transparent screen 10 needs to be visually recognized by the platform passenger as an image. As 10, a transmissive transparent screen is used.
Hereinafter, the transmissive transparent screen will be described in detail.

  The transmission-type transparent screen has a first surface and a second surface opposite to the first surface, and transmits the scene on the second surface side so that the first viewer on the first surface side can see the first surface. The image of the first surface is transmitted to the second observer (passenger) on the second surface side so as to be visible, and image light projected from the first surface side is transmitted to the second surface side. A transmission-type transparent screen that is visibly displayed as an image to a second observer (passenger / passenger), and includes a light-scattering layer that includes a transparent resin and a light-scattering material, and further includes a light-absorbing material as necessary.

FIG. 3 is a layer configuration diagram showing an example of a transmissive transparent screen.
In the transmissive transparent screen 10 a, a light scattering sheet 20 is disposed between a first transparent substrate 12 and a second transparent substrate 14.
The first transparent substrate 12 and the light scattering sheet 20 are bonded by the first adhesive layer 16, and the second transparent substrate 14 and the light scattering sheet 20 are bonded by the second adhesive layer 18. Yes.

(Transparent substrate)
Examples of the material of the first transparent substrate 12 and the second transparent substrate 14 (hereinafter collectively referred to as a transparent substrate) include glass and transparent resin. The material of each transparent substrate may be the same or different.

  Examples of the glass constituting the transparent substrate include soda lime glass, alkali-free glass, borosilicate glass, and aluminosilicate glass. The transparent substrate made of glass may be subjected to chemical strengthening, physical strengthening, hard coating or the like in order to improve durability.

  The transparent resin constituting the transparent substrate includes polycarbonate, polyester (polyethylene terephthalate, polyethylene naphthalate, etc.), triacetyl cellulose, cycloolefin polymer, polymethyl methacrylate, ethylene-tetrafluoroethylene copolymer (ETFE) and polytetra Examples thereof include fluorine-containing resins such as fluoroethylene (PTFE), and polycarbonate, polyester, and cycloolefin polymer are preferred from the viewpoint of weather resistance and transparency.

As the transparent substrate, chemically tempered glass is preferable from the viewpoint of achieving both weight reduction and strength required for the door panel 50.
As the transparent substrate, those having no birefringence are preferable from the viewpoint of the visibility of the image displayed on the transparent screen and the visibility of the scene on the other side of the transparent screen.

  The thickness of a transparent base material should just be the thickness by which durability as a base material is maintained. The thickness of the transparent substrate may be, for example, 0.5 mm or more, 1 mm or more, and 2 mm or more. Moreover, the thickness of a transparent base material may be 10 mm or less, for example, and may be 5 mm or less.

The arithmetic average roughness Ra of the surface of the first transparent substrate 12 (first surface A) and the surface of the second transparent substrate 14 (second surface B) is preferably 0.3 μm or less. More preferably, it is not more than 05 μm. When the arithmetic average roughness Ra is 0.3 μm or less, the image light L projected from the projector 80 is unlikely to be scattered on the first surface A and the second surface B. As a result, the formation of a double image due to the image light L imaged on the light scattering layer being scattered at a position different from the light scattering layer can be suppressed. The arithmetic average roughness Ra of the surface of the first transparent substrate 12 (first surface A) and the surface of the second transparent substrate 14 (second surface B) is easy to manufacture the transparent substrate. From the viewpoint of cost, 0.001 μm or more is preferable.
Even when the outermost layer of the transmissive transparent screen is not a transparent substrate (for example, a transparent film, a light scattering layer, or the like), the first and second surfaces of the transmissive transparent screen are used. The preferable range of the arithmetic average roughness Ra is the same as that when the outermost layer is a transparent substrate.

(Adhesive layer)
Examples of materials for the first adhesive layer 16 and the second adhesive layer 18 (hereinafter also collectively referred to as an adhesive layer) include ethylene-vinyl acetate copolymer, polyvinyl butyral, and pressure-sensitive adhesive (acrylic pressure-sensitive adhesive, urethane-based). Pressure-sensitive adhesive, urethane acrylate-based pressure-sensitive adhesive, etc.), photo-curable resin composition, thermosetting resin composition, thermoplastic resin composition, and the like. The material of each adhesive layer may be the same or different.

  Examples of the thermoplastic resin contained in the thermoplastic resin composition include plasticized polyvinyl acetal, plasticized polyvinyl chloride, saturated polyester, plasticized saturated polyester, polyurethane, plasticized polyurethane, ethylene-vinyl acetate copolymer, ethylene -Ethyl acrylate copolymer etc. are mentioned.

  The thickness of each adhesive layer should just be the thickness by which the function as an adhesive layer is maintained, for example, 0.1-1.5 mm is preferable and 0.3-1 mm is more preferable.

(Light scattering sheet)
The light scattering sheet 20 includes a first transparent film 21; light scattering in which a light scattering material 23 and a light absorbing material (not shown) are dispersed in a transparent resin 22 provided on the surface of the first transparent film 21. Layer 24.
The thickness of the light scattering sheet 20 is preferably 11 to 700 μm.

(Transparent film)
The first transparent film 21 (hereinafter also referred to as a transparent film) may be a transparent resin film or a thin glass film.

  Examples of the transparent resin constituting the transparent resin film include polycarbonate, polyester (polyethylene terephthalate, polyethylene naphthalate, etc.), triacetyl cellulose, cycloolefin polymer, polymethyl methacrylate, and the like.

  The thickness of the transparent film is preferably such that a roll-to-roll process can be applied, for example, 0.01 to 0.5 mm is preferable, 0.05 to 0.3 mm is more preferable, and 0.2 mm or less is more preferable.

(Light scattering layer)
The light scattering layer 24 includes a transparent resin 22 and a light scattering material 23. The light scattering layer 24 may contain a light absorbing material.

  Examples of the transparent resin 22 include a cured product of a photocurable resin (acrylic resin, epoxy resin, etc.), a cured product of a thermosetting resin (acrylic resin, epoxy resin, etc.), and a thermoplastic resin (polyester resin, acrylic resin, polyolefin resin). And cycloolefin resins, polycarbonate resins, polyimide resins, polyethylene resins, urethane resins, ionomer resins, ethylene / vinyl acetate copolymer resins, polyvinyl butyral resins, fluorine-containing resins such as ETFE and PTFE, and silicone resins). The yellow index of the transparent resin is preferably 10 or less, and more preferably 5 or less, from the viewpoint of maintaining transparency so that the function as a window in the transmissive transparent screen 10a is not impaired.

Examples of the light scattering material 23 include titanium oxide (refractive index: 2.5 to 2.7), tantalum oxide, zirconium oxide (refractive index: 2.4), aluminum oxide (refractive index: 1.76), and nanodiamond ( Fine particles of high refractive index material such as refractive index: 2.42); Particles of low refractive index material such as porous silica (refractive index: 1.3 or less), hollow silica (refractive index: 1.3 or less); Transparent resin Resin materials having a low refractive index and low compatibility with 22; resin materials having a crystallized particle diameter of 1 μm or less, and the like.
As the light scattering material 23, the difference in refractive index from the transparent resin 22 is 0.15 to 0.2, the particle diameter is 1 μm or more, or the difference in refractive index from the transparent resin 22 is 0.15 or more. Particles with a particle size of less than 1 μm are preferred.
As the light-scattering material 23, titanium oxide, zirconium oxide, and nanodiamond are particularly preferable from the viewpoint of a high refractive index.
The proportion of the light scattering material 23 is preferably 0.01 to 5 mass%, more preferably 0.1 to 1 mass%, out of 100 mass% of the light scattering layer 24. By setting the ratio of the light scattering material 23 within the above range, the sum of the haze and the diffuse reflectance of the transmissive transparent screen 10a can be adjusted to 10 to 90%.

When the light scattering material 23 is a particle having a refractive index difference of 0.15 or more from the transparent resin 22 and a particle diameter of less than 1 μm, the average primary particle diameter of the particles is preferably 0.02 to 0.8 μm. 0.03-0.6 μm is more preferable, and 0.15-0.5 μm is more preferable. If the average primary particle diameter of the particles is within the above range, the sum of the haze and the diffuse reflectance of the transmissive transparent screen 10a is easily set to 10 to 90%. Further, if the average primary particle diameter of the light scattering material 23 is approximately the same as or slightly smaller than the wavelength of the scattered light, the probability of scattering the incident light in the same direction as the incident direction increases, and the incident light is not refracted. The function to scatter is strengthened. As a result, the distortion of the scene seen beyond the transmissive transparent screen 10a when viewed from the observer side is suppressed, and the amount of light is not changed suddenly, thereby improving the visibility of the scene. Further, when the average primary particle diameter of the light scattering material 23 is smaller than the wavelength of the scattered light, the scattering angle is increased and the viewing angle can be increased.
In the case where the light scattering material 23 is a particle having a refractive index difference of 0.2 or less from the transparent resin 22 and having a particle diameter of 1 μm or more, the average primary particle diameter of the particle is 100 μm or less from the viewpoint of transparency. preferable.

  As the light scattering material 23, fine particles having isotropic scattering properties (also referred to as isotropic scattering fine particles) are preferable. The isotropic scattering fine particles reflect incident light in all directions. Since normal particles have a high probability of scattering incident light in the same direction as the incident direction, when the incident angle of the image light L to the transparent screen 10a increases, the emission angle of the scattered light from the transparent screen 10a also increases. It becomes difficult for the second observer X (passenger) standing in front of the transparent screen 10a to visually recognize the video. On the other hand, in the isotropic scattering fine particles, incident light is reflected in all directions, so that even if the incident angle of the image light L to the transparent screen 10a is large, the second observer X (in front of the transparent screen 10a) It is easier to see the video from passengers.

The average primary particle diameter of the isotropic scattering fine particles is 10 to 100 nm, and preferably 30 to 50 nm. If the average primary particle diameter of the isotropic scattering fine particles is within the above range, the isotropic scattering as a screen can be sufficiently utilized.
As the isotropic scattering fine particles, those having a high refractive index are preferable, and titanium oxide, zirconium oxide, nanodiamond and the like having an average primary particle diameter within the above range are preferable.
As the isotropic scattering fine particles, those close to a true sphere are preferable. Even when the isotropic scattering fine particles have an anisotropic shape, the order parameter may be 0.1 or less.

  The isotropic scattering fine particles are preferably surface-treated in order to improve the mixing property with the transparent resin 22. The surface treatment area is preferably 50 to 100% of the surface (100%) of the fine particles.

  When the light scattering layer 24 includes a light absorbing material, a part of light propagating as unnecessary stray light in the transmissive transparent screen 10a can be absorbed, and scattered light is reduced. For this reason, it is possible to suppress the phenomenon that the transmissive transparent screen 10a appears cloudy. Further, the contrast of the scene seen from the other side of the transmissive transparent screen 10a when viewed from the observer side is improved, and the visibility of the scene is also improved.

Examples of the light absorbing material include carbon-based materials (carbon black, nanodiamond, fullerene, carbon nanotube, carbon nanohorn, graphene, and the like), titanium black, black silica, fine particles mainly containing silver, and organic dyes.
The proportion of the light-absorbing material is preferably 10 to 0.01 mass%, more preferably 5 to 0.1 mass%, from the viewpoint of uniform coatability, out of 100 mass% of the light scattering layer 24.
When the light absorbing material is fine particles, the average primary particle diameter of the fine particles is preferably 1 to 100 nm.

1-200 micrometers is preferable and, as for the thickness of the light-scattering layer 24, 10 micrometers or less are more preferable. When the thickness of the light scattering layer 24 is 1 μm or more, the light scattering effect is sufficiently exhibited. If the thickness of the light scattering layer 24 is 200 μm or less, it is easy to form the light scattering layer 24 by a roll-to-roll process. If the thickness of the light scattering layer 24 is within the above range, the sum of the haze and the diffuse reflectance of the transmissive transparent screen 10a can be easily set to 10 to 90%.
In the light scattering layer 24, the light scattering material 23 may be uniformly dispersed throughout the light scattering layer 24 or may be localized near the surface of the light scattering layer 24.

(Method for producing light scattering sheet)
The light scattering sheet 20 can be manufactured by the following procedure, for example.
A paste containing a photocurable resin, a light scattering material 23 and a light absorbing material is prepared.
A paste is apply | coated to the surface of the 1st transparent film 21, and a 2nd transparent film (not shown) is piled up on a paste.
The paste is irradiated with light (ultraviolet rays or the like) from the first transparent film 21 side or the second transparent film 35 side to cure the photocurable resin, and the light scattering material 23 and the light absorption in the transparent resin 22. The light scattering sheet 20 is obtained by forming the light scattering layer 24 in which the material is dispersed.
The light scattering sheet 20 can also be manufactured by the following procedure.
A coating solution containing a solvent, a thermoplastic resin, a light scattering material 23 and a light absorbing material is prepared.
The light-scattering sheet 20 is obtained by apply | coating a coating liquid to the surface of the 1st transparent film 21, and making it dry.
The light scattering sheet 20 can also be manufactured by the following procedure.
The light scattering sheet 20 is obtained by extruding the thermoplastic resin, the light scattering material 23 and the light absorbing material. A master batch method may be used.

(Low reflective layer)
The transmissive transparent screen 10a may have a low reflection layer on the surface (first surface A) of the first transparent substrate 12. By having the low reflection layer, even when the image light L has a large incident angle, reflection on the surface of the transparent screen 10 is suppressed. As a result, a decrease in transmittance can be suppressed and screen gain can be further secured. Further, the variation in transmittance due to the location of the transmissive transparent screen 10a (difference in incident angle) is suppressed, and the video light L can be introduced into the transmissive transparent screen 10a with an appropriate amount of light and without unevenness.

  The low reflection layer may be one obtained by sticking an antireflection film having a low reflection layer on the surface thereof to the surface (first surface A) of the first transparent substrate 12. It may be formed directly on the surface (first surface A). When the first transparent substrate 12 is omitted, it may be formed directly on the surface of the first transparent film 21.

Examples of the low reflection layer include a low refractive index single layer film, a multilayer film in which a plurality of dielectric films are laminated, and a fine uneven structure.
The low reflection layer is preferably a multilayer film in which a plurality of dielectric films are laminated from the viewpoint of excellent antireflection effect and wear resistance, and more preferably a multilayer film having an outermost surface other than inorganic fluoride.
As the low reflection layer, one having an outermost surface composed of silicon oxide or aluminum oxide is preferable, and a surface provided with a hydrophilic or water-repellent coating such as a silane compound is more preferable, and the silane compound contains fluorine. What is the contained silane compound is more preferable.

(Optical characteristics of transmissive transparent screen)
The sum of the haze and the diffuse reflectance of the transmissive transparent screen 10a is 10 to 90%, preferably 15 to 50%, and more preferably 15 to 35%. If the sum of haze and diffuse reflectance is 10% or more, screen gain and viewing angle can be secured. If the sum of haze and diffuse reflectance is 90% or less, the other side can be discriminated through the transmissive transparent screen 10a, and if it is 50% or less, the entire transmissive transparent screen 10a appears to be clouded. It can be suppressed. As a result, the contrast of the scene seen beyond the transmissive transparent screen 10a when viewed from the second observer X (passenger) side is improved, and the visibility of the scene is improved. Further, the contrast of the image displayed on the transmissive transparent screen 10a is improved, and the visibility of the image is improved.

The haze of the transmissive transparent screen 10a is preferably 9 to 85%, more preferably 9 to 45%, still more preferably 12 to 30%, and particularly preferably 15 to 26%. If the haze is 9% or more, the screen gain and the viewing angle can be further secured. If the haze is 45% or less, the phenomenon that the entire transmissive transparent screen 10a appears cloudy can be further suppressed. As a result, the contrast of the scene seen beyond the transmissive transparent screen 10a when viewed from the second observer X (passenger) side is further improved, and the visibility of the scene is further improved. Further, the contrast of the image displayed on the transmissive transparent screen 10a is further improved, and the visibility of the image is further improved. The haze of the transmissive transparent screen 10a is measured with respect to light incident from the first surface A side and transmitted to the second surface B side.
The haze of the transmissive transparent screen 10 a can be set to the above range by adjusting the concentration of the light scattering material 23 or adjusting the thickness of the light scattering layer 24 including the light scattering material 23.

The diffuse reflectance of the transmissive transparent screen 10a is preferably 0 to 5%, more preferably 0 to 2%, still more preferably 0 to 1.7%, and particularly preferably 0 to 1%. If the diffuse reflectance is 5% or less, the phenomenon that the entire transmissive transparent screen 10a appears cloudy can be further suppressed. As a result, the contrast of the scene seen beyond the transmissive transparent screen 10a when viewed from the second observer X (passenger) side is further improved, and the visibility of the scene is further improved. Further, the contrast of the image displayed on the transmissive transparent screen 10a is further improved, and the visibility of the image is further improved. The diffuse reflectance of the transmissive transparent screen 10a is measured with respect to light incident from the second surface B side and reflected to the second surface B side.
The diffuse reflectance of the transmissive transparent screen 10a adjusts the concentration of the light scattering material 23, adjusts the thickness of the light scattering layer 24 including the light scattering material 23, or adjusts the concentration of the light absorbing material. The film thickness can be controlled within the above range by adjusting the thickness of the layer containing the light-absorbing material or by providing a low reflection layer or the like.
The sum of the haze and the diffuse reflectance of the transmissive transparent screen 10a can be controlled by adjusting the concentration of the light scattering material 23 and the concentration of the light absorbing material.

The total light transmittance of the transmissive transparent screen 10a is 10 to 90%, preferably 25 to 75%, and more preferably 40 to 65%. If the total light transmittance is 10% or more, the visibility of a scene seen beyond the transmissive transparent screen 10a when viewed from the second observer X (passenger) side is excellent. If the total light transmittance is 90% or less, the phenomenon that the entire transmissive transparent screen 10a appears cloudy can be suppressed. As a result, the contrast of the scene seen beyond the transmissive transparent screen 10a when viewed from the second observer X (passenger) side is improved, and the visibility of the scene is improved. Further, the contrast of the image displayed on the transmissive transparent screen 10a is improved, and the visibility of the image is improved. The total light transmittance of the transmissive transparent screen 10a is measured for light incident from the first surface A side and transmitted to the second surface B side.
The total light transmittance of the transmissive transparent screen 10a can be set to the above range mainly by adjusting the concentration of the light absorbing material or adjusting the layer thickness of the layer containing the light absorbing material. .

  The difference in refractive index between adjacent layers in the transmissive transparent screen 10a is preferably within 0.2 from the viewpoint that the reflectance at each layer interface is suppressed to within 0.5%, and the reflectance at each layer interface is 0.1. From the point which becomes about%, 0.1 or less is more preferable.

(Video display method using a transparent transparent screen)
In the transmissive transparent screen 10a, as shown in FIG. 3, the image light L projected from the projector 80 and incident from the first surface A of the transmissive transparent screen 10a is scattered by the light scattering layer 24. The image is formed and displayed so as to be visible to the second observer X (passenger / passenger) on the opposite side of the projector 80 as an image.

  The light of the scene on the first surface A side is incident on the transmissive transparent screen 10a from the first surface A, and then part of the light is scattered in the light scattering layer 24 and the rest is transmitted. Accordingly, when the image light L is not projected from the projector 80 onto the transmissive transparent screen 10a, the second observer X (passenger) on the second surface B side can visually recognize the scene on the first surface A side. . Similarly, after the light of the scene on the second surface B side is incident on the transmissive transparent screen 10a from the second surface B, a part of the light is scattered in the light scattering layer 24 and the rest is transmitted. Thereby, when the image light L is not projected from the projector 80 onto the transmissive transparent screen 10a, the first observer on the first surface A side can visually recognize the scene on the second surface B side.

<Other embodiments>
The movable door device of the present invention is not limited to the illustrated home door device.
For example, the projector 80 may be provided in the door pocket 60 when there is a space around the opening 62 of the door pocket 60.
In order to improve the visibility of the scene on the other side of the door panel 50, the door panel 50 may have a part of the window in the frame 52 as the transparent screen 10 and the rest as a normal glass plate. For example, the upper half of the window may be the transparent screen 10 and the lower half may be a normal glass plate.

If water droplets or dirt adheres to the surface of the transparent screen 10, the image light L and scattered light are reflected, and the visibility of the image decreases.
Therefore, a wiper or the like may be provided at the opening 62 of the door pocket 60 in order to remove water droplets and dirt on the surface of the transparent screen 10 when the door panel 50 advances and retracts.
The surface of the transparent screen 10 may be subjected to a water repellent treatment so that water droplets on the surface of the transparent screen 10 naturally fall.
Superhydrophilic treatment may be performed on the surface of the transparent screen 10 so that water droplets on the surface of the transparent screen 10 spread thinly.

When the door panel 50 is stored, if the hand of the person touches the transparent screen 10, there is a risk of being caught in the door pocket 60.
Therefore, a touch sensor having a transparent conductive film is provided on the surface of the transparent screen 10 on the platform side, the touch sensor and the projector control device are electrically connected, and transparent when a human hand touches the transparent screen 10. An image of alerting may be displayed on the screen 10, or the touch sensor and the door control device may be electrically connected to stop the operation of the driving device when a human hand touches the transparent screen 10. Good.

<Other transmission type transparent screen>
The transmission type transparent screen only needs to have a light scattering layer containing a transparent resin and a light scattering material, and is not limited to the transmission type transparent screen 10a in the illustrated example.
For example, in the transmissive transparent screen 10a, the first transparent substrate 12 or the second transparent substrate 14 may be omitted; the second transparent layer 10 may be provided between the second adhesive layer 18 and the light scattering layer 24. 2 may be included; if the light scattering layer 24 is tacky, the first transparent film and the adhesive layer may be omitted.
Moreover, what adhered the light-scattering sheet | seat 20 to the window body of the existing door panel may be sufficient.
Moreover, you may have light-scattering sheets other than the light-scattering sheet 20. FIG.

FIG. 4 is a layer configuration diagram showing another example of the transmissive transparent screen.
In the transmissive transparent screen 10 b, a light scattering sheet 30 is disposed between the first transparent substrate 12 and the second transparent substrate 14.
The first transparent substrate 12 and the light scattering sheet 30 are bonded by the first adhesive layer 16, and the second transparent substrate 14 and the light scattering sheet 30 are bonded by the first adhesive layer 18. Yes.
Hereinafter, the same components as those of the transmissive transparent screen 10a in FIG.

(Light scattering sheet)
The light scattering sheet 30 includes a first transparent film 31; a second transparent film 35; and a light scattering layer 34 provided between the first transparent film 31 and the second transparent film 35. The light-scattering layer 34 includes a transparent layer 32; a plurality of cross-sections in the direction perpendicular to the longitudinal direction extending in the plane direction and arranged in parallel to each other in the transparent layer 32 at predetermined intervals. Light scattering portion 33. Hereinafter, a structure in which a plurality of light scattering portions 33 extending in a one-dimensional direction in a stripe shape in this way is sometimes referred to as a louver structure.

  The first transparent film 31 and the second transparent film 35 in the light scattering sheet 30 are the same as the transparent film of the transmissive transparent screen 10a, and the preferred forms are also the same. The transparent layer 32 is preferably a transparent resin layer, and the transparent resin constituting the transparent resin layer may be the same as the transparent resin 22 of the light scattering sheet 20 described above, and the preferred form is also the same. .

(Light scattering part)
Examples of the material for the light scattering portion 33 include the same materials as those for the light scattering layer 24 described above, and preferred forms are also the same.
10-250 micrometers is preferable and, as for the space | interval (distance between the centers of the adjacent light-scattering parts 33) of the light-scattering part 33, 10-100 micrometers is more preferable. If the interval between the light scattering portions 33 is 10 μm or more, the light scattering portions 33 are easily formed. If the space | interval of the light-scattering part 33 is 250 micrometers or less, the light-scattering part 33 will be hard to visually recognize.

  The width of the light scattering portion 33 (the direction of the surface of the light scattering sheet 30 and the direction orthogonal to the longitudinal direction of the light scattering portion 33) is preferably 10 to 70% of the interval between the light scattering portions 33, and more preferably 25 to 50%. . If the width of the light scattering portion 33 is 10% or more of the interval between the light scattering portions 33, the light scattering portion 33 is easily formed. If the width of the light scattering portion 33 is 70% or less of the interval between the light scattering portions 33, the transmittance of the light scattering portion 33 and the transparency of the scene seen beyond the transmissive transparent screen 10b when viewed from the observer side. Will improve.

The ratio of the height of the light scattering portion 33 to the width of the light scattering portion 33 (the direction orthogonal to the surface direction of the light scattering sheet 30), that is, the aspect ratio, is obliquely incident while maintaining the straight light transmittance of the scene. 1 or more is preferable, 1.5 or more is more preferable, and 2 or more is more preferable from the point which scatters the light from a light source with high gain.
The shape of the cross section perpendicular to the longitudinal direction of the light scattering portion 33 is not limited to a right triangle as shown in the example, and may be another triangle, a trapezoid, a bell shape, or the like.

(Low reflective layer)
The transmissive transparent screen 10b may have a low reflection layer on the surface (first surface A) of the first transparent substrate 12.
As a low reflection layer, the same thing as the low reflection layer in the transmissive transparent screen 10a is mentioned, A preferable form is also the same.

(Optical characteristics of transmissive transparent screen)
The optical characteristics of the transmissive transparent screen 10b are the same as the optical characteristics of the transmissive transparent screen 10a.

<Reflective transparent screen>
A reflective transparent screen may be used as the transparent screen 10. However, in the case of using a reflective transparent screen, it is necessary to provide the projector 80 closer to the platform than the transparent screen 10 in order to allow the passengers on the platform side to visually recognize the image light L projected from the projector 80 as an image. is there.
Hereinafter, the reflective transparent screen will be described in detail.

  The reflective transparent screen has a first surface and a second surface opposite to the first surface, and the second surface side view is visually recognized by a first observer (passenger) on the first surface side. The first surface side view is transmitted to the second viewer on the second surface side so as to be visible, and the image light projected from the first surface side is transmitted on the first surface side. It is a transparent screen that is displayed so as to be visible to the first observer (passenger) as an image.

FIG. 5 is a layer configuration diagram showing an example of a reflective transparent screen.
The reflective transparent screen 10 c is configured such that a light scattering sheet 40 is disposed between a first transparent substrate 12 and a second transparent substrate 14.
The first transparent substrate 12 and the light scattering sheet 40 are bonded by the first adhesive layer 16, and the second transparent substrate 14 and the light scattering sheet 40 are bonded by the second adhesive layer 18. Yes.
Hereinafter, the same components as those of the transmissive transparent screen 10a in FIG.

(Light scattering sheet)
The light scattering sheet 40 includes a first transparent film 41; a first transparent layer 42 provided on the surface of the first transparent film 41 and having an irregular concavo-convex structure on the surface; and a first transparent layer 42 A reflective film 43 that is formed along the surface of the concavo-convex structure side and transmits a part of incident light; a second transparent layer 44 provided so as to cover the surface of the reflective film 43; And a second transparent film 45 provided on the surface of the transparent layer 44.

(Transparent film)
The first transparent film 41 and the second transparent film 45 (hereinafter collectively referred to as a transparent film) are the same as the transparent film of the transmissive transparent screen 10a, and the preferred forms are also the same.

(Transparent layer)
The first transparent layer 42 and the second transparent layer 44 (hereinafter collectively referred to as a transparent layer) are preferably transparent resin layers. The material of each transparent layer may be the same or different, and the same is preferable.
Examples of the transparent resin constituting the transparent resin layer include those similar to the transparent resin 22 constituting the light scattering layer 24 of the transmissive transparent screen 10a, and preferred forms are also the same.

The thickness of the transparent layer (excluding the portion where the concavo-convex structure is formed) may be any thickness that can be easily formed by a roll-to-roll process, and is preferably 0.5 to 50 μm, for example.
The transmittance of the transparent layer is preferably 50 to 100%, more preferably 75 to 100%, and still more preferably 90 to 100%.

  The arithmetic average roughness Ra of the irregular concavo-convex structure formed on the surface of the first transparent layer 42 is preferably 0.01 to 20 μm, and more preferably 0.05 to 10 μm. If the arithmetic average roughness Ra is within this range, the projected image has a wide viewing angle, and can be viewed without directly viewing the specularly reflected light, thereby suppressing graininess due to the uneven structure. If the arithmetic average roughness Ra is 10 μm or less, it is more preferable that the concavo-convex structure does not get in the way when viewing a scene beyond the reflective transparent screen 10c.

(Reflective film)
The reflection film 43 may be any film that transmits part of the light incident on the reflection film 43 and reflects the other part. Examples of the reflective film 43 include a metal film, a semiconductor film, a dielectric single layer film, a dielectric multilayer film, and combinations thereof.

Examples of the metal constituting the metal film and the semiconductor film include aluminum, silver, nickel, chromium, tungsten, silicon, and the like. Aluminum, silver, or an alloy containing them as a main component is preferable.
Examples of the dielectric constituting the dielectric film include metal oxides and metal nitrides.
The reflective film 43 preferably has a metal thin film or a film structure in which an oxide film, a metal thin film, and an oxide film are laminated in this order.

The thickness of the reflective film 43 is preferably 1 to 100 nm from the viewpoint that it can be utilized without disturbing the function of the irregular uneven structure formed on the surface of the first transparent layer 42 by the arithmetic average roughness Ra. 4-25 nm is more preferable.
The reflectivity of the reflective film 43 is preferably 5% or more, more preferably 15% or more, and even more preferably 30% or more as a range in which a sufficient screen gain can be obtained.

(Low reflective layer)
The transmissive transparent screen 10c may have a low reflection layer on the surface (first surface A) of the first transparent substrate 12.
As a low reflection layer, the same thing as the low reflection layer in the transmissive transparent screen 10a is mentioned, A preferable form is also the same.

(Method for producing light scattering sheet)
The light scattering sheet 40 is formed, for example, by forming the first transparent layer 42 by an imprint method using a mold having an irregular concavo-convex structure formed on the surface, and forming the first transparent layer 42 on the surface of the first transparent layer 42 by physical vapor deposition. It can be manufactured by depositing metal to form the reflective film 43.

(Optical characteristics of reflective transparent screen)
The sum of haze and diffuse reflectance of the reflective transparent screen 10c is 10 to 90%, preferably 20 to 70%, and more preferably 30 to 50%. If the sum of haze and diffuse reflectance is 10% or more, screen gain and viewing angle can be secured. If the sum of haze and diffuse reflectance is 90% or less, the phenomenon that the entire reflective transparent screen 10c appears cloudy can be suppressed. As a result, the contrast of the scene seen beyond the reflective transparent screen 10c when viewed from the first observer X (passenger) side is improved, and the visibility of the scene is improved. Further, the contrast of the image displayed on the reflective transparent screen 10c is improved, and the visibility of the image is improved.

  The haze of the reflective transparent screen 10c is preferably 0 to 50%, more preferably 0 to 15%, and further preferably 0 to 10%. If the haze is 50% or less, the visibility of a scene seen beyond the reflective transparent screen 10c when viewed from the first observer X (passenger / passenger) side is further improved. The haze of the reflective transparent screen 10c is measured with respect to light incident from the second surface B side and transmitted to the first surface A side.

  The diffuse reflectance of the reflective transparent screen 10c is preferably 5% or more, more preferably 15% or more, further preferably 30% or more, and further preferably 50% or more. If the diffuse reflectance is 5% or more, the screen gain can be further secured. The diffuse reflectance of the reflective transparent screen 10c is preferably 90% or less, and more preferably 80% or less. If the diffuse reflectance is 90% or less, the visibility of a scene seen beyond the reflective transparent screen 10c when viewed from the first observer X (passenger / passenger) side is further improved. The diffuse reflectance of the reflective transparent screen 10c is measured with respect to light incident from the first surface A side and reflected to the first surface A side.

  The ratio of diffuse reflectance to haze (diffuse reflectance / haze) is preferably 0.5 or more, and more preferably 1 or more. If the diffuse reflectance / haze is 1 or more, the visibility of the scene seen from the other side of the reflective transparent screen 10c when viewed from the first observer X (passenger / exit) side is good, the projected image and the reflective type A view beyond the transparent screen 10c can be seen. Such a reflective transparent screen 10c is suitable for use in an environment where ambient light is present.

  The total light transmittance of the reflective transparent screen 10c is 10 to 90%, preferably 15 to 80%, and more preferably 25 to 75%. If the total light transmittance is 10% or more, the visibility of a scene seen beyond the reflective transparent screen 10c when viewed from the first observer X (passenger / passenger) side is excellent. If the total light transmittance is 90% or less, a screen gain can be secured. The total light transmittance of the reflective transparent screen 10c is measured with respect to light incident from the second surface B side and transmitted to the first surface A side.

The reflectance of the surface of the first surface A of the reflective transparent screen 10c is preferably 2% or less, more preferably 1% or less, and further preferably 0.5% or less from the viewpoint of sufficiently suppressing the formation of double images. preferable.
The reflectance of the reflective transparent screen 10c is preferably 10% or more, and more preferably 30% or more. If the reflectance is 10% or more, the screen gain can be further secured. The reflectance of the reflective transparent screen 10c is measured with respect to light incident from the first surface A side and reflected to the first surface A side.

  The refractive index difference between adjacent layers in the reflective transparent screen 10c is preferably 0.2 or less from the viewpoint that the reflectivity at each layer interface is suppressed to within 0.5%, and the reflectivity at each layer interface is 0.1. From the point which becomes about%, 0.1 or less is more preferable.

(Video display method using a reflective transparent screen)
In the reflective transparent screen 10c, as shown in FIG. 5, the image light L projected from the projector 80 and incident from the first surface A of the reflective transparent screen 10c is scattered by the reflective film 43. The image is displayed so as to be visible to the first observer X (passenger) who is on the same side as the projector 80.

  The light of the scene on the first surface A side is incident on the reflective transparent screen 10c from the first surface A, and then partially reflected by the reflective film 43 and the rest is transmitted. Thereby, when the image light L is not projected from the projector 80 onto the reflective transparent screen 10c, the second observer on the second surface B side can visually recognize the scene on the first surface A side. Similarly, after the light of the scene on the second surface B side is incident on the reflective transparent screen 10c from the second surface B, a part of the light is reflected by the reflective film 43 and the rest is transmitted. Thereby, when the image light L is not projected from the projector 80 onto the reflective transparent screen 10c, the first observer X (passenger) on the first surface A side can visually recognize the scene on the second surface B side. .

<Other reflective transparent screens>
The reflective transparent screen is not limited to the reflective transparent screen 10c in FIG.
For example, in the reflective transparent screen 10c; the first transparent substrate 12 or the second transparent substrate 14 may be omitted; either the first transparent film 41 or the second transparent film 45 One or both may be omitted; the transparent film and the adhesive layer may be omitted.
Moreover, what adhered the light-scattering sheet 40 to the window body of the existing door panel may be sufficient.
Moreover, you may have light-scattering sheets other than the light-scattering sheet 40. FIG. For example, a hologram screen; a light scattering sheet using a scattering member such as a particle or a porous body; a light scattering sheet using a cholesteric liquid crystal or the like.

In the reflective transparent screen, the uneven structure on the surface of the first transparent layer may be a regular uneven structure, or may be a curved uneven structure (such as a microlens array). However, for the following reasons, the uneven structure on the surface of the first transparent layer is preferably an irregular uneven structure.
When a reflective film is formed on the surface of a regular concavo-convex structure (such as a microlens array), color unevenness occurs in the scene seen from the side of the transparent screen as viewed from the observer side due to light diffraction, or the observer observes by spectroscopy. The edge portion of the scene seen from the side of the transparent screen when viewed from the side looks like a rainbow color, and visibility is impaired. On the other hand, when a reflective film is formed on the surface of an irregular concavo-convex structure, light diffraction and spectroscopy hardly occur, and these problems hardly occur. Therefore, the phenomenon that the color changes depending on the direction and location of viewing the transparent screen and the direction of the incident light is suppressed, and the spectroscopic view of the scene that is visible beyond the transparent screen is suppressed. As a result, it is possible to provide a property as a transparent screen that is excellent in the visibility of the scene seen beyond the transparent screen and the color reproducibility of the scene and video and does not disturb the line of sight.

<Action mechanism>
In the movable door device of the present invention described above, the projector is located in the door pocket and at a position where image light can be projected onto the transparent screen of the door panel advanced from the door pocket, or a position adjacent to the door pocket. In addition, since it is installed at a position where image light can be projected onto the transparent screen of the door panel that has advanced from the door pocket, the image light can be projected onto the transparent screen of the door panel without being blocked by passengers or trains.
Further, since the sum of the haze and the diffuse reflectance of the transparent screen is 10 to 90% and the total light transmittance is 10 to 90%, the projector is provided at a position where the maximum projection angle becomes large. Therefore, even if the image light L is projected such that the incident angle on the surface of the transparent screen is increased, the image can be displayed on the transparent screen of the door panel, and the scene on the other side of the door panel can be visually recognized through the transparent screen of the door panel.

Hereinafter, the present invention will be described in more detail using examples, but the present invention is not limited to these examples.
Examples 1 to 3 are production examples, examples 4 to 6 are examples, and examples 7 and 8 are reference examples.

(Example 1)
Production of light scattering sheet:
A transparent polyethylene terephthalate (hereinafter referred to as PET) film (Toyobo Co., Ltd., Cosmo Shine (registered trademark) A4300, thickness: 100 μm) was prepared.
Ethanol, polyvinyl butyral (hereinafter referred to as PVB) powder (manufactured by Sekisui Chemical Co., Ltd., BL-1, average refractive index: 1.5), titanium oxide particles (average primary particle size: 250 nm, average refractive index: 2. 7) and carbon black (average primary particle diameter: 40 nm, average refractive index: 2.0) were mixed using a rotation / revolution type stirring deaerator to obtain a coating liquid (1). The mass ratio of each component was ethanol: PVB powder: titanium oxide particles: carbon black = 100: 10: 0.1: 0.1.
A coating solution was applied to the surface of the PET film at a thickness of 50 μm by a die coating method, and dried at 50 ° C. to form a light scattering layer having a thickness of 5 μm, thereby obtaining a light scattering sheet (1).

Transparent screen manufacturing:
Soda lime glass (thickness: 2 mm), ethylene-vinyl acetate copolymer (hereinafter referred to as EVA) sheet (thickness: 0.4 mm), light scattering sheet (1), EVA sheet, soda lime glass (thickness) The thickness was laminated in the order of 2 mm). The laminate was put into a vacuum chamber and heated at 140 ° C. for 1 hour to obtain a transmissive transparent screen (1). The optical characteristics are shown in Table 1. When we looked through the transmissive transparent screen (1), we could see far away scenes. Further, when image light was projected from the projector onto the transmissive transparent screen (1), the image displayed on the transmissive transparent screen (1) was sufficiently visible.

(Example 2)
Production of light scattering sheet:
Ethanol, the same PVB powder as in Example 1, isotropically scattering titanium oxide fine particles obtained by the firing method (Ishihara Sangyo Co., Ltd., TTO-51B, average primary particle size: 35 nm, average refractive index: 2.7, surface-treated Al (OH) ₃ ), the same carbon black as in Example 1 was mixed using a rotation and revolution type stirring and defoaming device to obtain a coating liquid (2). The mass ratio of each component was ethanol: PVB powder: titanium oxide fine particles: carbon black = 100: 10: 0.1: 0.1.
The coating solution is applied to the surface of the same PET film as in Example 1 by a die coating method at a thickness of 50 μm and dried at 50 ° C. to form a light scattering layer having a thickness of 5 μm, and a light scattering sheet (2) Got.

Transparent screen manufacturing:
A transmissive transparent screen (2) was obtained in the same manner as in Example 1 except that the light scattering sheet (2) was used instead of the light scattering sheet (1). The optical characteristics are shown in Table 1. Looking through the transmissive transparent screen (2), the far side was visible. Further, when image light was projected from the projector onto the transmissive transparent screen (2), the image displayed on the transmissive transparent screen (2) was sufficiently visible.

(Example 3)
Transparent screen manufacturing:
One of the two soda lime glasses (thickness: 2 mm) is a glass plate (BK7, thickness: 1 mm) having a low reflection layer of Example 8 to be described later, and the low reflection layer becomes the surface of the transmissive transparent screen. A transmissive transparent screen (3) was obtained in the same manner as in Example 1 except that the above arrangement was made. The optical characteristics are shown in Table 1. When the low reflective layer was arranged to be the first surface and the other side was seen through the transmissive transparent screen (3), a distant view could be seen. Further, when image light was projected from the projector onto the transmissive transparent screen (3), the image displayed on the transmissive transparent screen (3) was sufficiently visible.

(Example 4)
Assembly of the movable door device:
The transmissive transparent screen (3) was attached to the inside of the door panel of the movable door device, and the movable door device was assembled.
A short installed on the first surface side of the transmissive transparent screen (3) at a position where the shortest distance from the transmissive transparent screen (3) is 20 cm and the maximum projection angle (maximum incident angle) is 80 °. The image light was projected from the focus projector onto the first surface side of the transmissive transparent screen (3). The image displayed on the transmissive transparent screen (3) was sufficiently visible on the second surface side with a small difference in the amount of light depending on the position where the image was displayed.

(Example 5)
Assembly of the movable door device:
A movable door device is assembled in the same manner as in Example 4 except that the transmissive transparent screen (2) is mounted in the frame of the door panel instead of the transmissive transparent screen (3), and the short focus projector at the same position as in Example 4 The image light was projected onto the first surface side of the transmissive transparent screen (2). The image displayed on the transmissive transparent screen (2) had a small difference in the amount of light depending on the position where the image was displayed, and was sufficiently visible on the second surface side.

(Example 6)
Assembly of the movable door device:
Instead of the transmissive transparent screen (3), the transmissive transparent screen (1) is installed in the frame of the door panel, and a polarizing plate that allows p-polarized light to pass through the light exit of the short focus projector is installed. Then, the movable door device was assembled, and image light was projected from the short focus projector at the same position as in Example 4 onto the first surface side of the transmissive transparent screen (1). The image displayed on the transmissive transparent screen (1) had a small difference in the amount of light depending on the position where the image was displayed, and was sufficiently visible on the second surface side.

(Example 7)
FIG. 6 shows transmission spectra of a glass plate (BK7) having a thickness of 1 mm at incident angles of 0 °, 45 °, and 60 °.
As the incident angle increases, the transmittance decreases. Here, the decrease in transmittance is reflection and absorption, and the absorption is constant. Therefore, it can be seen that the reflectance increases as the incident angle increases.

(Example 8)
Thickness: On one surface of a glass plate (BK7) having a thickness of 1 mm, in order from the glass plate side, a silicon oxide film (125 nm), a tantalum oxide film (11 nm), a silicon oxide film (57 nm), a tantalum oxide film (45 nm), By forming a silicon oxide film (8 nm), a tantalum oxide film (79 nm), and a silicon oxide film (113 nm), a low reflection layer composed of a multilayer film was formed.
The low reflective layer of Example 8 is such that the refractive index of the entire layer is low and the refractive index of the outermost film is lower than the refractive index of the previous film. Such a low reflection layer can reduce the change in reflectance with respect to the incident angle.
FIG. 7 shows the transmission spectrum of the glass plate with the low reflection layer when the incident angle of the incident light on the surface of the low reflection layer is 0 °, 45 °, and 60 °.
According to the glass plate with a low reflection layer of Example 8, it can be seen that the difference between the transmittance of light incident at 60 ° and the transmittance of light incident at 0 ° is reduced. Such a low reflection layer can reduce a difference in transmittance depending on an incident angle, and can reduce a difference in light amount depending on a place where an image is displayed.

  The movable door device according to the present invention includes a movable home door device arranged along the edge of the platform; a movable door device installed at an elevator landing; a movable door device installed at an entrance of a building. Useful as such.

  DESCRIPTION OF SYMBOLS 1 Home door apparatus, 10 Transparent screen, 10a Transmission-type transparent screen, 10b Transmission-type transparent screen, 10c Reflective-type transparent screen, 12 1st transparent base material, 14 2nd transparent base material, 16 1st contact bonding layer, 18 Second adhesive layer, 20 Light scattering sheet, 21 First transparent film, 22 Transparent resin, 23 Light scattering material, 24 Light scattering layer, 30 Light scattering sheet, 31 First transparent film, 32 Transparent layer, 33 Light scattering portion, 34 Light scattering layer, 35 Second transparent film, 40 Light scattering sheet, 41 First transparent film, 42 First transparent layer, 43 Reflective film, 44 Second transparent layer, 45 Second Transparent film, 50 door panel, 52 frame, 60 door pocket, 62 opening, 64 housing, 70 protective support, 72 opening, 74 housing, 80 projector, A first surface, Second surface, L video light, X-observer (passengers).

Claims (8)

A door panel having a transparent screen having a sum of haze and diffuse reflectance of 10 to 90% and a total light transmittance of 10 to 90%;
A door pocket capable of storing the door panel;
A drive device for advancing and storing the door panel from the opening at the side end of the door pocket;
The transparent of the door panel that is in the door pocket and that is capable of projecting image light onto the transparent screen of the door panel that has advanced from the door pocket, or that is adjacent to the door pocket and that has advanced from the door pocket. A movable door device equipped with a projector installed at a position where image light can be projected onto the screen.   The movable door device according to claim 1, wherein the projector is a short focus projector.   The movable door device according to claim 1 or 2, wherein the transparent screen is a transmissive transparent screen having a light scattering layer including a transparent resin and a light scattering material.   The movable door device according to claim 3, wherein the light scattering material is a particle having a refractive index different from the refractive index of the transparent resin by 0.15 or more.   The movable door device according to claim 3 or 4, wherein the light scattering material is an isotropic scattering fine particle having an average primary particle diameter of 10 to 100 nm.   The movable door device according to any one of claims 1 to 5, wherein the transparent screen has a low reflection layer on a surface on which the image light is projected.   The movable door according to any one of claims 1 to 6, wherein the projector is a projector that projects image light in which a p-polarized component is larger than an s-polarized component on the surface of the transparent screen. apparatus.   The movable door apparatus as described in any one of Claims 1-7 which is a platform door apparatus installed in a platform.

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