JP5396103B2 - Spherical display - Google Patents

Description

  The present invention relates to a spherical display that can be used in a digital globe or the like.

  Most conventional displays are flat, and there are almost no three-dimensional displays such as spherical surfaces. In addition, there is a flat display in which an image is changed by an external force such as a touch by a user, but there is no such three-dimensional display.

  On the other hand, conventional globes have images of the earth's surface printed on a sphere, which can be moved around the axis, but can be moved in any direction or change the surface image. Was impossible.

  Then, although invention of patent document 1 was made | formed, this invention detects the very small movement of a hemispheric dome, and it was difficult to implement | achieve.

JP 2003-241648 A

  In order to solve the above problems, the present invention provides a spherical display that can change an image displayed by an external force, an information terminal that can be used for the display, and a digital globe realized by projecting an image of the earth surface. It is an object to provide a spherical display.

  As a result of earnest research, the present inventors have provided a projector having a fisheye lens system inside a hemispheric screen capable of transmitting the projected image, and provided a sensor for detecting the displacement and direction of the external force applied to the hemispheric screen. It has been found that a spherical display capable of changing an image in accordance with an external force can be provided by using at least three displacement detection devices provided.

  That is, the above-described problems can be solved by the following embodiments.

(1) A hemispherical screen that has a hollow hemispherical shape and is capable of transmitting an image projected on the inner peripheral surface to the outer peripheral surface, a support member that supports a circular opening edge of the hemispherical screen, and the circular opening edge At least three displacement detectors provided on the inner peripheral surface side of the unit and having a sensor for detecting the displacement and direction of the external force applied to the hemispheric screen, and projecting an image on the inner peripheral surface of the hemispheric screen. A projector having a fisheye lens system, a video database storing video to be projected, and a map conversion system capable of converting video, and being able to communicate with the projector, selecting video from the video database Output the image signal of the image to the projector, and the output signal of the displacement detector is input to the inner circumference of the hemispheric screen. The image projected on the, to appear to move at a speed corresponding to the displacement of the external force in the direction of the external force, and a video generation device for varying the mapping transform system video, the support member, the An annular base frame that supports the circular opening edge of the hemispherical screen, a support frame that is supported on a support base and supports the base frame, and four circumferential positions of the base frame at 90 ° intervals. A displacement transmission member installed, wherein the displacement detection device is provided between the displacement transmission member and the support frame, and detects displacement of the displacement transmission member relative to the support frame. A spherical display characterized by that.

(3) (1), as an image to be displayed on the hemispherical screen, together with longitude and latitude lines, spherical display, wherein the digital globe shape is representative of the earth's surface.

ADVANTAGE OF THE INVENTION According to this invention, the spherical display which can change an image | video according to external force, and the digital globe- shaped spherical display which can move to arbitrary directions using this can be provided.

Sectional drawing which shows typically the spherical display which concerns on the Example of this invention. A perspective view showing some of the components of the spherical display The perspective view which expands and shows a part of support member of the spherical display Side view of the spherical display displacement detector The perspective view which expands and shows a part of displacement detection apparatus of the same spherical display The perspective view which shows the mechanism of the displacement detection apparatus of the same spherical display Block diagram showing the biaxial displacement sensor and processing circuit of the spherical display The figure which shows the picture generated by the map conversion system projected on the same spherical display The figure which shows the picture generated by the map conversion system projected on the same spherical display Schematic diagram showing a usage example of a spherical display according to the same embodiment

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 to 3, a spherical display 10 according to an embodiment of the present invention includes a hemispherical screen 12, a support member 20, a displacement detection device 30 having a proximity sensor, a projector 40, and an image generation device. 50.

  The hemispherical screen 12 is a hollow hemispherical shape having a diameter of about 1 meter, and is a transmissive screen made of acrylic. The projected image so that the projected image on the inner peripheral surface can be viewed from the outer peripheral surface side. Can be transmitted. On the inner peripheral surface, a light diffusion layer (not shown) having an appropriate thickness is formed by sandblasting or the like.

  The support member 20 includes a support base 21, a support housing 22, a support frame 23, a base frame 24, a displacement transmission member 25, and a hemispherical screen fixing member 27, and supports the flange at the circular opening edge of the hemispherical screen 12. Have been to.

  The support housing 22 has a hollow hemispherical shape having the same diameter as that of the hemispherical screen 12, and does not transmit light.

  The support base 21 stably supports the support frame 23 and the projector 40 thereon, and the support frame 23 supports the annular base frame 24, the displacement detection device 30 and the projector 40. The support frame 23 includes a square frame.

The base frame 24 is configured to fix and support the hemispheric screen 12 via a hemispheric screen fixing member 27 so that the hemispheric screen 12 and the support housing 22 form one sphere. The hemispherical screen 12 and the support housing 22 are configured so that a circular opening edge cannot be visually recognized from the outside by a dome flange cover 28 .

  The displacement transmitting member 25 is configured to transmit the displacement of the hemispherical screen 12 transmitted through the hemispherical screen fixing member 27 to the displacement detecting device 30 and is provided at four positions in the circumferential direction of the base frame 24 at 90 degree intervals. is set up. As shown in FIG. 3, the displacement transmission member 25 is installed at a position corresponding to four vertices of a square frame included in the support frame 23.

  The hemispherical screen fixing member 27 has a lower end fixedly supported by the displacement transmission member 25 and an upper end fixed to the flange of the circular opening edge of the hemispherical screen 12.

  As shown in FIGS. 3 to 6, the displacement detection device 30 is fixedly supported on the support frame 23 by fastening brackets 29 at the positions of the four displacement transmission members 25. The displacement detection device 30 includes a displacement sensor block 26, a deflection rod 31, distance measurement plates 33A and 33B, a distance measurement plate fixing rod 34, and a slide adjustment piece 35.

  The displacement sensor block 26 is an orthogonal biaxial displacement sensor, and detects displacements in the vertical direction and the horizontal direction with respect to the hemispherical screen 12. The sensors used for the displacement sensor block 26 are proximity sensors 38A and 38B, which measure the distance between the displacement sensor block 26 and the distance measurement plates 33A and 33B.

  The flexible rod 31 is made of a highly rigid metal and is configured to fix and support the displacement sensor block 26. The flexible rod 31 is slightly displaced according to the displacement of the hemispherical screen 12 transmitted by the displacement transmitting member 25.

  The distance measurement plates 33A and 33B are made of metal, and are fixedly supported by a distance measurement plate fixing rod 36 so as to be spaced apart from the displacement sensor block 26.

  The slide adjusting pieces 35 are a set of two, and can adjust the amount of deflection of the deflection rod. The slide adjustment piece 35 on the displacement sensor block 26 side is movable, and is fixed to the fastening bracket 29 after adjusting the deflection amount. The slide adjustment piece 35 on the support frame 23 side is always fixed to the fastening bracket 29.

  When the displacement transmitting member 25 is displaced by the external force applied to the hemispheric screen 12, the displacement sensor block 26 fixedly supported by the flexible rod 31 is also displaced accordingly, and the distance from the distance measuring plates 33A and 33B is changed. The proximity sensors 38A and 38B are adapted to detect this distance displacement. The proximity sensors 38A and 38B are differential transformers, which convert mechanical linear displacements into electrical signals and detect them electrically. This electrical signal is output to the video generation device 50.

  For example, an x-direction detection member is arranged at the center position via a coil spring in the x-axis direction on a ring that deforms when strain is transmitted, and is centered on a similar ring via a coil spring in the y-axis direction. If the y direction detection member is arranged at the position and the displacement amount of the x direction and the y direction detection member is detected, the magnitude and direction of the distortion can be detected two-dimensionally. In this embodiment, the proximity sensor 38A is an x-direction detection member, and the proximity sensor 38B is a y-direction detection member.

  According to the mechanism for detecting this displacement, a straight line passing through the center of the hemispheric screen 12 is set perpendicular to the rotation direction when the hemispheric screen 12 is viewed from the front, that is, the plane including the circular opening edge of the hemispheric screen 12. It is possible to detect the direction of rotation. If this straight line is the z-axis, and the straight line orthogonal to the plane including the circular opening edge of the hemispherical screen 12 is the x-axis and the y-axis, a one-dimensional sensor can detect displacement in the x-axis direction and the y-axis direction. Is enough. In addition, although the displacement detection apparatus is installed so that it may be on an x-axis and a y-axis, it does not need to be parallel. If they are not parallel, the x-axis component and y-axis component of the displacement are calculated and obtained.

  Further, simply, four sets of displacement sensor blocks provided at equal intervals on the edge of the circular opening of the hemispherical screen 12 can be used as a one-dimensional sensor, and can be rotated only in the x-axis direction and the y-axis direction. .

  The projector 40 is provided inside the support housing 22 and has an image element and a light source. The projector 40 converts an electrical signal supplied from the video generation device 50 to the hemispherical screen 12 and projects it through the fisheye lens system 42. It is fixed by a support frame 23.

  The fisheye lens system 42 is a projection lens of the projector 40, and is a conformal mapping fisheye lens system capable of 180-degree hemispherical projection.

  The video generation device 50 is installed outside the sphere composed of the hemispherical screen 12 and the support housing 22, is connected to the projector 40 and is communicable, and outputs a video signal of the video to be projected to the projector 40. At the same time, an output signal that is an electrical signal detected by the displacement detection device 30 is input, and the image projected on the inner peripheral surface of the hemispherical screen 12 appears to move in the direction of the external force at a speed corresponding to the displacement of the external force. Thus, the video is changed, and the changed video is supplied to the projector 40.

  The video generation device 50 includes a video database, a detailed information database, and a mapping conversion system. The video database has video data projected on the hemispherical screen 12. The detailed information database has local detailed information on the projected image corresponding to the position of the information terminal 60. Video data included in the video database may be stored in advance, or may be acquired from the Internet.

  The video generation device 50 further includes a processing circuit 37 (see FIG. 7) that processes the electrical signals supplied from the proximity sensors 38A and 38B. The processing circuit 37 obtains the external force applied to the hemispheric screen 12 and the direction of the external force from the electrical signal. The processing circuit 37 and the four sets of proximity sensors 38A and 38B are connected as shown in FIG. In FIG. 7, the displacements of the displacement sensor block 26 in the vertical direction and the horizontal direction are separately supplied to the processing circuit 37.

  Since the image is projected onto the hemispherical screen 12 through the fisheye lens system 42, the image is generated by the mapping conversion system in consideration of deformation at the time of projection. When an external force is applied to the hemispheric screen 12, an image is regenerated by the mapping conversion system so that the hemispheric screen 12 appears to move according to the displacement of the hemispheric screen 12 supplied from the proximity sensors 38A and 38B.

  Specifically, when an image of the earth surface viewed from the Pacific side as shown in FIG. 8 is projected on the hemispherical screen 12, when an external force is applied in the direction of the arrow, the image reproduction by the mapping conversion system is performed. Repeated while changing the projection position on the hemispheric screen, an image of the earth surface viewed from the north pole periphery side as shown in FIG. When the image changes from FIG. 8 to FIG. 9, the globe appears to rotate from the outside.

  As shown in FIG. 10, the spherical display 10 projects an image of the earth surface onto a hemispheric screen 12, and when an external force is applied to the hemispheric screen 12 by a human hand or the like, the external force of the hemispheric screen 12 is applied. A displacement is detected, and an image is changed in accordance with the displacement. Since the image changes so as to move at a speed corresponding to the displacement of the external force in the direction in which the external force is applied, for those who appreciate the spherical display 10, not only in one direction but also in various directions up, down, left and right It feels like a globe that can move freely.

  In addition, by displaying a cloud image or a temperature change image superimposed on the image of the earth surface, it is possible to provide weather information of the entire earth that is not localized. By displaying past data and predicted future data, long-term weather changes, the effects of global warming, migratory flight routes, etc. can be presented in an easy-to-understand manner. That is, information about a sphere like the earth can be expressed as it is.

  The information terminal 60 is a portable information device and has a display 62. When the information terminal 60 is close to the hemispherical screen 12, the information terminal 60 displays information supplied from the video generation device 50 for the portion of the video displayed at the close location. 62 is displayed / reproduced.

  Specifically, the information terminal 60 is configured to emit near-infrared light, and the transmission / reception device 64 is provided on the inner peripheral surface side of the hemispheric screen 12, and an object near the surface on the outer peripheral surface side of the hemispheric screen 12 is selected. The near-infrared camera to be detected is configured to recognize the near-infrared light emitted from the information terminal 60 as an image and supply the image to the video generation device 50.

  The video generation device 50 processes the image supplied from the transmission / reception device 64, specifies the position on the hemispheric screen 12 pointed to by the information terminal 60, and supplies the transmission / reception device 64 with detailed information corresponding to the specified position. . The transmission / reception device 64 is configured to supply detailed information acquired from the video generation device 50 to the information terminal 60.

  The display 62 is provided in the information terminal 60 and displays information acquired by the information terminal 60.

  Therefore, the information terminal 60 can acquire detailed information of the corresponding part by bringing the information terminal 60 close to the hemispherical screen 12. The acquired information is displayed on the display 62. For example, an image such as a scenery of a point indicated by the information terminal 60, data such as weather information, and the like are displayed.

  The sensor for detecting the displacement of the hemispheric screen may be a strain gauge different from that used in the above embodiment, or may be an optical distance displacement sensor, a sensor for detecting the distance displacement by capacitance, or the like. There may be. In the embodiment, sensors are installed at four locations, but the same functions as in the embodiment can be realized by software processing at three locations. Furthermore, instead of the distance displacement or in addition to the distance displacement, a displacement of pressure or angle may be detected.

  Further, instead of directly applying an external force to the spherical display, a small sphere for remote control may be prepared separately, and the displayed image may be changed by applying the external force to the small sphere. In this case, the sensor is provided inside the sphere for remote control, and the user can change the image displayed on the spherical display to move by applying an external force to the sphere for remote control by hand.

  The size of the spherical display is not particularly limited, but practically a diameter of about 10 cm to about 1 m as in the embodiment is suitable. Further, the support housing is not a hemisphere as in the embodiment, but may be a combination of polygons such as a rectangular parallelepiped or a soccer ball.

  The hemispherical screen only needs to be capable of transmitting an image, and may be made of synthetic resin other than acrylic or glass.

  The projector and the video generation device may be connected by wire as in the embodiment, or may be connected wirelessly, as long as communication is possible.

  The information to be transmitted to the information terminal may be supplied from the video generation device as in the embodiment, or a separate information supply device may be prepared. Information may be downloaded by connecting a spherical display to the Internet. By doing in this way, it is also possible to reproduce | regenerate audio | voice etc. in real time, for example.

  In the embodiment of the present invention, it can be used as a digital globe that can be moved and operated interactively in an arbitrary direction with the same feeling as actually turning the globe, and further information can be obtained with an information terminal. In addition to this, by acquiring information through the Internet, it can be used as a multimedia medium, for example, indicating the location of an occurrence point at the time of a disaster, displaying the course of a typhoon, and a change in temperature. When used as a multimedia medium, it is possible to connect a controller to the video generation device to start / stop video display, start from an arbitrary position, and change the display speed. In addition, it is possible to select and superimpose video to be displayed.

DESCRIPTION OF SYMBOLS 10 ... Spherical display 12 ... Hemispheric screen 20 ... Support member 21 ... Support stand 22 ... Support housing 23 ... Support frame 24 ... Base frame 25 ... Displacement transmission member 26 ... Displacement sensor block 27 ... Hemisphere screen fixing member 28 ... Dome flange cover DESCRIPTION OF SYMBOLS 29 ... Fastening metal fitting 30 ... Displacement detection apparatus 33A, 33B ... Distance measurement board 34 ... Distance measurement board fixed rod 35 ... Slide adjustment piece 37 ... Processing circuit 38A, 38B ... Proximity sensor 40 ... Projector 42 ... Fisheye lens system 50 ... Image generation apparatus 60 ... Information terminal 62 ... Display 64 ... Transmitter / receiver

Claims (2)

A hemispherical screen having a hollow hemispherical shape and capable of transmitting the image projected on the inner peripheral surface to the outer peripheral surface;
A support member for supporting the circular opening edge of the hemispherical screen;
At least three displacement detectors provided on the inner peripheral surface side of the circular opening edge and having sensors for detecting the displacement and direction of an external force applied to the hemispheric screen;
A projector adapted to project an image on an inner peripheral surface of the hemispheric screen, and having a fisheye lens system;
A video database storing video to be projected and a map conversion system capable of converting video, and capable of communicating with the projector, and selecting a video from the video database and selecting a video signal of the selected video as the projector And an output signal of the displacement detection device is input so that the image projected on the inner peripheral surface of the hemispheric screen appears to move in the direction of the external force at a speed corresponding to the displacement of the external force. A video generation device that changes video by a map conversion system;
Equipped with a,
The support member includes an annular base frame that supports a circular opening edge of the hemispheric screen, a support frame that is supported on a support base and supports the base frame, and 4 in the circumferential direction of the base frame. A displacement transmitting member installed at intervals of 90 degrees,
The spherical display , wherein the displacement detection device is provided between the displacement transmission member and the support frame, and detects a displacement of the displacement transmission member with respect to the support frame . In claim 1 ,
A spherical display characterized in that, as an image displayed on the hemispherical screen , the surface of the earth is displayed in a digital globe shape together with meridians and parallels .

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