JP2011232669A5 - - Google Patents

Description

To fulfill the above object, an aspect of the display device of the present invention, a flat stage which is formed from the beam splitter, and a display element arranged below the stage, formed from the beam splitter, the stage and a dome portion disposed so as to cover the upper, the display device so as to irradiate light to the inner surface of the dome portion, located farther from the dome portion than the focal point of the dome portion It has been, the stage, the is disposed between the focal point of the dome portion and the display device, characterized in that.

[First embodiment]
FIG. 1 is a perspective view showing a schematic configuration of the display device according to the first embodiment. 2 is a cross-sectional view showing the internal configuration of the display device as seen from the II-II cross section in FIG. 3, and FIG. 3 is a cross section showing the internal configuration of the display device as seen from the III-III cross section in FIG. FIG.
As shown in FIGS. 1 to 3, the display device 1 includes a pedestal 2, a stage 3, a display element 4, and a dome portion 5.
Base 2, a disk-shaped bottom plate 21, a cylindrical wall portion 22 provided upright from the peripheral edge of the bottom plate 21, provided with and has a light shielding property as a whole.

The stage 3 covers the upper part of the pedestal 2 so as to close the internal space of the pedestal 2. The stage 3 is formed in a disc shape by a beam splitter such as a half mirror. The beam splitter is formed by depositing a highly reflective material such as Ag or Al on a transparent substrate such as glass or acrylic by vapor deposition or sputtering. FIG. 4 is an explanatory diagram showing the film formation state of the stage 3. As shown in FIG. 4 (a), may be subjected to a uniform film over the entire surface of the stage 3, but by adjusting the ratio between the transmittance T1 of the stage 3 and the reflectivity R1 by the location, the display device 4 It is preferable to have high transparency on the side and high reflectivity on the imaging side. For example, as shown in FIG. 4B, the film may be formed so that the film thickness gradually decreases from the front to the rear, or away from the vicinity of the display element 4 as shown in FIG. As the film thickness increases, the film thickness may be gradually increased.

The display element 4 is, for example, a liquid crystal display element or an organic EL display element. The display element 4 is accommodated in the base 2 below the stage 3. The display device 4 has its upper end portion faces the center O1 of the stage 3, is arranged from the vertical line L1 inclined so as to be separated to the rear passing through the hand center O1 As proceeds downward. The inclination angle of the display element 4 is preferably about 45 degrees with respect to the horizontal plane. And the display surface 41 of the display element 4 has faced the opposite side to the observation side (front). Thereby, the display element 4 irradiates light to the inner surface of the dome portion 5 opposite to the observation side.

The dome portion 5 is formed in a substantially hemispherical shape with a transparent material such as glass or acrylic. The dome portion 5 covers the stage 3 so as to protrude upward. The inner surface of the dome portion 5 has a smooth concave curved surface 51, and it is preferable to form a highly reflective reflective layer on the surface of the concave curved surface 51. A beam splitter such as a half mirror can be used as the dome portion 5. When the spherical surface of the concave curved surface 51 is O2 and the radius of curvature is R, the focal point f of the concave curved surface 51 with respect to light parallel to the optical axis L2 is f = R / 2, and the concave curved surface 51 and the spherical center on the optical axis L2 It arrange | positions in the approximate center with O2. That is, the display element 4 is arranged at a position farther from the dome part 5 than the focal point f of the dome part 5, and the stage 3 is arranged between the focal point f of the dome part 5 and the display element 4. In the following description, among the concave surface 51 of the dome 5, the half front side to the first inner surface 51a, referred to as a second inner surface 51b opposite to the viewing side of the rear half.

Here, as long as it is within the range capable of reflecting the second inner surface 51b of the optical dome portion 5 emitted from the display element 4, although not much the brightness and resolution of the real image even shaking the viewing angle, size There is some variation in the size.
A case where the viewing angle is swung up and down will be described with reference to FIGS. 9, if the viewing angle becomes rather small from the viewing position of FIG. 5, FIG. 10, when the viewing angle is increased from the viewing position of FIG. 5, FIG. 11 is further viewing angle from viewing position of FIG. 9 It shows a case that has become rather small. In FIG. 10 and FIG. 11, the emitted light d2 is omitted for convenience.
If the viewing angle becomes rather small from the observation position shown in Figure 5, the emitted light d1, d2, d3 of the imaging position A, B, C is the position shown in FIG. Furthermore the viewing angle small Kunar, each emitting light d1, d3 of the imaging position A, C is the position shown in FIG. 11. Further, when the viewing angle increases from the observation position shown in FIG. 5, the imaging positions A and C of the respective emitted lights d1 and d3 become the positions shown in FIG. From these figures, it can be seen that the size from the imaging position A to the imaging position D, that is, the size of the real image increases as the viewing angle decreases.

Next, the case where the viewing angle is swung to the left and right will be described with reference to FIGS. 12 shows the case where the viewing angle is moved to the left, and FIG. 13 shows the case where the viewing angle is moved to the right. In FIG. 12 and FIG. 13, the light emitted from the display element 4 is the light emitted from the right end (right emitted light d21) of the second light emitted and the light emitted from the left end (left) for easy understanding. represents an emission light d22), the. When the viewing angle is tilted to the left from the observation positions of FIGS. 7 and 8, the imaging positions B1 and B2 of the right emission light d21 and the left emission light d22 are the positions shown in FIG. On the other hand, when the viewing angle is tilted to the right from the observation positions of FIGS. 7 and 8, the imaging positions B1 and B2 of the right emission light d21 and the left emission light d22 are the positions shown in FIG. Thus, when the viewing angle is moved to the left and right, the width of the real image is slightly distorted.
Note that the distortion of the real image when the viewing angle is swung in the vertical and horizontal directions as described above depends on the viewing angle in the third embodiment to be described later by introducing an image pickup device for photographing the observer. It is possible to prevent the observer from recognizing the distortion.

FIG. 14 is a perspective view showing a schematic configuration of the display device according to the second embodiment. 15 is a cross-sectional view showing the internal configuration of the display device viewed from the XV-XV cut surface in FIG. 16, and FIG. 16 is a cross-sectional view showing the internal configuration of the display device viewed from the XVI-XVI cut surface in FIG. FIG.
As shown in FIGS. 14 to 16, the display device 6 includes a pedestal 7, a stage 8, a display element 9, a dome portion 10, and a mirror 11.
The pedestal 7 includes a semicircular plate-like bottom plate 71 and a wall portion 72 erected from the periphery of the bottom plate 71 , and has a light shielding property as a whole.

Display element 4 has its upper end portion is opposed to the center of the arc O3 stage 8, and the vertical line passing through the hand center O3 as the proceeds downward is disposed inclined so as to be separated forward. And the display surface 41 of the display element 4 has faced the observation side.

As shown in FIG. 18, from the observer W, the imaging position G of the third emitted light d <b> 6 appears to be at the imaging position H by the stage 8. As a result, the imaging positions E, F, and H are arranged in a substantially vertical direction with respect to the stage 8, and the image displayed on the display element 4 is displayed three-dimensionally.
Here, if the light emitted from the display element 10 is within a range that can be reflected by the concave curved surface 101 that is the inner surface of the dome portion 10 through the stage 8, the brightness and fineness of the real image can be obtained even if the viewing angle is changed in this case. degree does not change much to do with. However, since the direction of the emitted light that can be used is limited by the viewing angle limiting film 81, the viewing angle range in which a real image can be observed becomes narrower than in the case of the first embodiment.

The turntable 52 is arranged so that the rotation center thereof coincides with the center O1 of the stage 3. The turntable 52 is provided with a display element support portion 55 that supports the display element 4 and an image sensor support portion 56 that supports the image sensor 54. Display element supporting portion 55 has an upper end portion of the display device 4 faces the center O1 of the stage 3, so as to be separated from the vertical line L1 to the rear passing through the hand center O1 As proceeds downward, tilting the display device 4 And support. On the other hand, the imaging element support section 56 supports the imaging element 54 so as to face the display element 4 across the vertical line L1. The optical axis of the image sensor 54 faces obliquely upward and forward so that the face of the observer W can be photographed.

FIG. 23 is a block diagram illustrating a main control configuration of the display device 50. As shown in FIG. 23, the display device 50 controls a position recognition unit 57 that recognizes the position of the observer W from an image captured by the image sensor 54, the image sensor 54, the display element 4, and the motor 53. a control unit 58, are provided.

Claims (8)

A flat stage formed from a beam splitter;
A display element disposed below the stage;
The formed from the beam splitter, and a dome portion disposed so as to cover the upper side of the stage,
The display element is disposed at a position farther from the dome than the focal point of the dome so as to irradiate the inner surface of the dome with light.
The stage is disposed between the focal point of the dome and the display element .
A display device characterized by that. The display device according to claim 1,
The dome portion is formed in a substantially hemispherical shape,
The display device, wherein the display element is disposed so as to irradiate light to an inner surface of the dome portion opposite to the observation side. The display device according to claim 1,
The dome portion is formed in a substantially quadrispherical shape, and the outer peripheral surface thereof is arranged to face the observation side,
The the observation side of the dome portion on the opposite side, flat mirror for closing said dome portion is disposed,
A viewing angle limiting film is laminated on the stage,
The display device, wherein the display element is arranged to irradiate light to an inner surface of the dome portion on the observation side. In the display device according to any one of claims 1 to 3,
A rotating unit that rotates the display element in a horizontal direction with respect to the center of the stage;
An image sensor that is arranged below the stage and photographs an observer;
A position recognition unit for recognizing the position of the observer from an image captured by the image sensor;
A control unit that controls the rotating unit such that the display element is arranged at a position facing the position recognized by the position recognizing unit ;
A display device comprising: The display device according to claim 4, wherein
The said control part switches the display content of the said display element with the rotation angle of the said rotation part, The display apparatus characterized by the above-mentioned. In the display device according to any one of claims 1 to 5,
The display device, wherein the beam splitter is a half mirror. In the display device according to any one of claims 1 to 6,
The display device, wherein the display element is a liquid crystal display element. In the display device according to any one of claims 1 to 6,
The display device is an organic EL display device.

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