JP7121579B2 - Spatial projection device - Google Patents

Description

The present invention relates to a spatial projection device.

FIG. 4 is a diagram showing a touchless switch with a conventional spatial projection structure (see Patent Document 1). This touchless switch includes a first original picture 501a, a first illumination means 502a, a second original picture 501b, a second illumination means 502b, a light transmission/reflection member 511, an imaging means 503, a light emitting element 504, It includes a light receiving element 505, a lighting means control device 506, a switch housing 513, and the like.

The first original picture 501a and the second original picture 501b are arranged at a position forming an angle of 90 degrees. They are positioned at an angle of 45 degrees. A light beam from the first original picture 501a is transmitted through a light transmitting/reflecting member 511, enters the imaging means 503, and forms a real image 510a in the air. The light beam from the second original picture 501b is reflected by the light transmitting/reflecting member 511, enters the imaging means 503, and forms a real image in the air.

The light emitting element 504 irradiates the real image 510a of the first original picture 501a and the real image of the second original picture 501b with light rays such as infrared rays. When a finger 509 , which is an object to be detected, is held over these real images, light rays from the light emitting element 504 are reflected by the finger 509 and enter the light receiving element 505 . The lighting means control device 506 controls lighting and extinguishing of the first lighting means 502 a and the second lighting means 502 b based on the detected object detection signal from the light receiving element 505 .

Such a touchless switch detects that the finger 509 is held over a spatially projected real image, and switches the spatially projected real image.

JP-A-10-106411

In the conventional spatial projection structure shown in FIG. 4, only two types of real image 510a of the first original picture 501a and the real image of the second original picture 501b can be displayed, increasing the number of display patterns. And there was room for improvement.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a spatial projection apparatus which has a simple configuration and is capable of spatially projecting three types of real images.

The present invention is a spatial projection apparatus for forming a real image of the display in space by passing light from the display through a spatial projection plate, comprising a first display and a second display as the display. and a third display, a first light source that irradiates light on the first display, a second light source that irradiates light on the second display, and light on the third display and a first light transmissive and reflective plate and a second light transmissive and reflective plate that transmit and reflect light, wherein the first light transmissive and reflective plate and the second light transmissive The reflective plates are arranged to intersect with each other, and the first display and The first light source is arranged, the second display and the second light source are arranged in a second area, and the third display and the third light source are arranged in a third area , the spatial projection plate is arranged in a fourth area, and a real image of a display body selected from the first display body, the second display body, and the third display body is spatially projected. A spatial projection device characterized by:
The present invention is a spatial projection apparatus for forming a real image of the display in space by passing light from the display through a spatial projection plate, comprising a first display and a second display as the display. and a third display, a first light source that irradiates light on the first display, a second light source that irradiates light on the second display, and light on the third display and a first light transmissive and reflective plate and a second light transmissive and reflective plate that transmit and reflect light, wherein the first light transmissive and reflective plate and the second light transmissive The reflective plates are arranged to intersect with each other, and the first display and The first light source is arranged, the second display and the second light source are arranged in a second area, and the third display and the third light source are arranged in a third area , wherein the spatial projection plate is arranged in a fourth area, and the first light transmissive and reflective plate and the second light transmissive and reflective plate have the same transmittance and reflectance, respectively. It is a device.

According to the present invention, it is possible to provide a spatial projection apparatus that has a simple configuration and is capable of spatially projecting three types of real images.

1 is a schematic configuration diagram of a spatial projection apparatus according to an embodiment of the present invention, showing a state in which a real image of a first display body is spatially projected; FIG. 2 is a diagram showing a state in which a real image of a second display body is spatially projected in the spatial projection device of FIG. 1; FIG. 2 is a diagram showing a state in which a real image of a third display body is spatially projected in the spatial projection device of FIG. 1; FIG. FIG. 1 shows a touchless switch with a conventional spatial projection structure;

A “spatial projection device” according to one embodiment of the present invention will be described with reference to FIGS. The spatial projection device 1 shown in FIGS. a second light source 32 that irradiates light on the third display body 23, a third light source 33 that irradiates light on the third display body 23, a first light transmissive reflective plate 41 and a second light transmissive reflective plate 42, and a space It comprises a projection plate 5, a control section 7 for controlling lighting and extinguishing of the first to third light sources 31, 32 and 33, and a housing (not shown) holding them.

The first to third display bodies 21, 22, and 23 are not electronic displays whose display contents can be changed, but objects such as films on which images are recorded, whose display contents are unchangeable. The display content may be a two-dimensional image or a three-dimensional image.

In FIG. 1, a circular first display body 21 and a circular real image 61 are depicted. It is a symbolic representation of the phenomenon.

Similarly, in FIG. 2, a square second display 22 and a square real image 62 are drawn, but this is because when the second light source 32 is turned on, the real image 62 of the second display 22 is projected into space. It is a symbolic representation of the phenomenon of being projected.

Similarly, in FIG. 3, the triangular third display body 23 and the triangular real image 63 are drawn, but this is because when the third light source 33 is turned on, the real image 63 of the third display body 23 appears in space. It is a symbolic representation of the phenomenon of being projected.

The first light transmitting/reflecting plate 41 and the second light transmitting/reflecting plate 42 reflect part of light and transmit part of it, and are generally called semitransparent mirrors. In this example, an acrylic plate having a reflective film formed on its surface is used. Also, in this example, the first light transmissive and reflective plate 41 and the second light transmissive and reflective plate 42 are formed to have the same transmittance and reflectance.

The first light transmissive and reflective plate 41 and the second light transmissive and reflective plate 42 are arranged to cross each other. Although the crossing angle of the first light transmission/reflection plate 41 and the second light transmission/reflection plate 42 can be adjusted as appropriate, in this example, in order to display the three types of real images 61, 62, and 63 at the same position, , the first light transmissive and reflective plate 41 and the second light transmissive and reflective plate 42 are arranged to intersect at right angles and form an angle of 45 degrees with the spatial projection plate 5 .

First to fourth areas A1, A2, A3, and A4 are defined in the spatial projection device 1 by the plane including the first light transmissive and reflective plate 41 and the plane including the second light transmissive and reflective plate . It is A first display 21 and a first light source 31 are arranged in the first area A1 of these four areas. A second display 22 and a second light source 32 are arranged in the second area A2. A third display 23 and a third light source 33 are arranged in the third area A3. A spatial projection plate 5 is arranged in the fourth area A4.

As shown in FIG. 1, a light beam L3 emitted from the first display member 21 by turning on the first light source 31 passes through the first light transmissive and reflective plate 41, and then passes through the second light transmissive and reflective plate 42. The light is reflected, transmitted through the spatial projection plate 5, and formed as a real image 61 in space. Further, 50% of the light beam L3 emitted from the first display member 21 passes through the first light transmissive reflection plate 41, and another 50% of the transmitted light quantity passes through the second light transmissive reflection plate 42. reflect. Therefore, 25% of the light beam L3 emitted from the first display member 21 is formed as the real image 61. FIG.

Similarly, the light beam L4 emitted from the first display body 21 by the lighting of the first light source 31 is reflected by the second light transmissive and reflective plate 42, then transmits through the first light transmissive and reflective plate 41, and passes through the space. It is transmitted through the projection plate 5 and formed as a real image 61 in space. Further, 50% of the light beam L4 emitted from the first display member 21 is reflected by the second light transmissive reflection plate 42, and another 50% of the reflected light quantity is reflected by the first light transmissive reflection plate 41. To Penetrate. Therefore, 25% of the light beam L4 emitted from the first display member 21 is formed as the real image 61. FIG.

As shown in FIG. 2, a light beam L1 emitted from the second display body 22 by turning on the second light source 32 passes through the second light transmissive and reflective plate 42, and then passes through the first light transmissive and reflective plate 41. It passes through the spatial projection plate 5 and is imaged as a real image 62 in space. Therefore, 25% of the light beam L1 emitted from the second display member 22 is imaged as the real image 62. FIG.

Similarly, the light beam L2 emitted from the second display body 22 due to the lighting of the second light source 32 passes through the first light transmissive and reflective plate 41, then the second light transmissive and reflective plate 42, and passes through the space. It is transmitted through the projection plate 5 and imaged as a real image 62 in space. Therefore, 25% of the light beam L2 emitted from the second display member 22 is formed as the real image 62. FIG.

As shown in FIG. 3, a light beam L5 emitted from the third display member 23 by turning on the third light source 33 passes through the second light transmissive and reflective plate 42, and then passes through the first light transmissive and reflective plate 41. It is reflected, transmitted through the spatial projection plate 5 and formed as a real image 63 in space. Therefore, 25% of the light beam L5 emitted from the third display member 23 is formed as the real image 63. FIG.

Similarly, the light beam L6 emitted from the third display body 23 by lighting the third light source 33 is reflected by the first light transmissive and reflective plate 41, then transmitted through the second light transmissive and reflective plate 42, and passes through the space. It is transmitted through the projection plate 5 and formed as a real image 63 in space. Therefore, 25% of the light beam L6 emitted from the third display member 23 is formed as the real image 63. FIG.

Thus, in this example, since the first light transmissive and reflective plate 41 and the second light transmissive and reflective plate 42 are formed to have the same transmittance and reflectance, three types of real images 61, 62, . 63 can be displayed with uniform brightness. The transmittance and reflectance of the first light transmitting/reflecting plate 41 and the second light transmitting/reflecting plate 42 do not necessarily have to be equal, and can be adjusted as appropriate.

The spatial projection plate 5 passes the light from the first to third display bodies 21, 22 and 23, and forms real images 61, 62 and 63 of the first to third display bodies 21, 22 and 23 in space. It is an imaging element, and a well-known microlens array, micromirror array, or the like can be used.

The control unit 7 controls lighting and extinguishing of the first to third light sources 31, 32, and 33 according to a predetermined program, and switches between three types of real images 61, 62, and 63 for display. In addition, for example, a signal that detects that a finger is held over the spatially projected real images 61, 62, and 63 is input to the control unit 7, and based on this input signal, the control unit 7 controls the spatially projected real images. It is good also as a structure which switches 61,62,63.

According to the spatial projection apparatus 1 configured as described above, by arranging the first light transmissive and reflective plate 41 and the second light transmissive and reflective plate 42 so as to intersect each other, three types of real images 61, 62, 62, 62 can be projected without using an electronic display. 63 can be spatially projected. Therefore, the spatial projection device 1 can be made simple.

(Reference example)
Although not the present invention, a spatial projection apparatus of a reference example will be described. This spatial projection apparatus has a configuration in which the second display 22 and the second light source 32 are omitted from the spatial projection apparatus 1 shown in FIGS. Although this spatial projection device has two types of real images that can be spatially projected, it is possible to reduce the dimension in the depth direction compared to the conventional spatial projection structure shown in FIG.

In addition, the above-described embodiment merely shows a typical form of the present invention, and the present invention is not limited to the embodiment. That is, various modifications can be made without departing from the gist of the present invention.

REFERENCE SIGNS LIST 1 spatial projection device 5 spatial projection plate 21 first display 22 second display 23 third display 31 first light source 32 second light source 33 third light source 41 first light transmissive and reflective plate 42 Second light transmissive reflective plate

Claims (4)

A spatial projection device for forming a real image of the display in space by passing light from the display through a spatial projection plate,
a first display body, a second display body, and a third display body as the display bodies;
a first light source that irradiates the first display body with light;
a second light source that irradiates the second display body with light;
a third light source that irradiates the third display body with light;
A first light transmissive reflective plate and a second light transmissive reflective plate that transmit and reflect light,
the first light transmissive reflective plate and the second light transmissive reflective plate are arranged to cross each other;
The first display member and the first light source are arranged in a first area of four areas partitioned by the first light transmissive reflection plate and the second light transmissive reflection plate, and the second The second display body and the second light source are arranged in the area of, the third display body and the third light source are arranged in the third area, and the spatial projection plate is arranged in the fourth area is placed ,
A real image of a display body selected from the first display body, the second display body, and the third display body is spatially projected.
A spatial projection device characterized by: A spatial projection device for forming a real image of the display in space by passing light from the display through a spatial projection plate,
a first display body, a second display body, and a third display body as the display bodies;
a first light source that irradiates the first display body with light;
a second light source that irradiates the second display body with light;
a third light source that irradiates the third display body with light;
A first light transmissive reflective plate and a second light transmissive reflective plate that transmit and reflect light,
the first light transmissive reflective plate and the second light transmissive reflective plate are arranged to cross each other;
The first display body and the first light source are arranged in a first area among four areas partitioned by the first light transmissive reflection plate and the second light transmissive reflection plate, and the second The second display body and the second light source are arranged in the area of, the third display body and the third light source are arranged in the third area, and the spatial projection plate is arranged in the fourth area is placed,
The first light transmissive and reflective plate and the second light transmissive and reflective plate have the same transmittance and reflectance.
A spatial projection device characterized by: The first light transmissive and reflective plate and the second light transmissive and reflective plate have the same transmittance and reflectance.
2. The spatial projection apparatus according to claim 1, wherein: The first light transmissive and reflective plate and the second light transmissive and reflective plate are arranged to cross each other at right angles, and form an angle of 45 degrees with the spatial projection plate. 4. The spatial projection apparatus according to any one of claims 1 to 3 , characterized by:

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