3D image display device and gaming machine

Abstract

To provide a stereoscopic display device with which it is possible to display a video having parallax for the left and right eyes of a viewer by causing beams entering from a plurality of light sources arranged on a side surface to be reflected by a transparent panel, as well as display a stereoscopic image in color by mixing the colors of the beams from the plurality of light sources.SOLUTION: A stereoscopic display device 100 pertaining to the present invention comprises: a transparent panel 20; two or more light sources 30 for emitting at least different colors and arranged on one side surface of the transparent panel 20; and a plurality of reflection plane sets 50h composed of reflection planes on the principal surface of the transparent panel 20, the reflection planes having a groove angle for reflecting to the viewpoint position of an observer, in correspondence to the beams from the respective light sources 30. By reflecting the beams from the light sources 30, it is possible for the observer to visually recognize a stereoscopic image at a fixed-point position, as well as recognize it as a color video due to the fact that the beams from the plurality of light sources 30 enter the viewpoint.SELECTED DRAWING: Figure 12

Description

[Technical Field]

[0001] The present invention relates to a stereoscopic image display device and a gaming machine. [Background technology]

[0002] A display device has been proposed that utilizes parallax to display stereoscopic vision and morphing, and also allows the background to be seen through, and that includes a display panel made of a transparent material and a group of elements whose components are dot-shaped reflective elements provided on the surface or inside of the display panel, and which as a whole displays a specific display pattern; the group of elements is provided for each of a plurality of pre-set viewpoints, and the group of elements provided for each viewpoint reflects light from a light source without the need to separately place an optical element on the display panel to provide parallax toward that viewpoint; and the display pattern displayed by the group of elements due to this reflected light is visible from the set viewpoint but not from viewpoints other than the set viewpoint (Patent Document 1).

[0003] However, the display device using the transparent panel of Patent Document 1 can only display a single color on one transparent panel, and is not capable of expressing colors. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-18194 Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, the present invention has been made in consideration of the above-mentioned problems, and aims to provide a stereoscopic image display device that can display a stereoscopic image to the observer's eyes by reflecting light rays incident from a light source arranged on the side with a transparent panel, and can display a color stereoscopic image by mixing the light rays from multiple light sources. [Means for solving the problem]

[0006] In order to achieve the above-mentioned main object, the present invention employs the following means.

[0007] The three-dimensional image display device according to the present invention comprises: A transparent panel and a plurality of light sources emitting light of different colors arranged on one side of the transparent panel; a reflecting surface set on a main surface of the transparent panel, the reflecting surface set having groove angles that reflect light rays from the plurality of light sources to a viewpoint of an observer, the reflecting surface set determining a color at one fixed point for one viewpoint of the observer; Equipped with The reflecting surface sets are provided in plurality, each corresponding to a different viewpoint position of the observer, and the plurality of light rays reflected from the reflecting surface sets corresponding to each viewpoint position are incident on the observer's viewpoint, thereby allowing the observer to recognize a color stereoscopic image at a fixed position.

[0008] The 3D image display device of the present invention selects only the light rays that reach the viewer from the omnidirectional light rays emitted from a fixed point of the 3D image to be displayed, and reproduces these light rays using reflective surfaces fabricated on the main surfaces of the transparent panels to project the 3D image. Furthermore, for example, red, green, and blue guided light rays are emitted from respective sets of reflective surfaces toward the respective viewpoints. These three light rays are mixed to produce a full-color image.

[0009] In the stereoscopic image display device according to the present invention, when it is assumed that the observer's viewpoint is located at n viewpoints (n≧2) at equal intervals within a predetermined viewpoint movement range, the reflective surface sets limit the emission direction to predetermined viewpoint positions, and are provided one at each position where a straight line passing through the viewpoint and the fixed point position intersects with the main surface of the transparent panel, for a total of n reflective surface sets; the plurality of light rays reflected from the sets of reflecting surfaces corresponding to the respective viewpoint positions are incident on the viewpoints of an observer, thereby allowing the observer to recognize a color three-dimensional image at a fixed position; The reflective surface set may be constructed based on a design that represents a three-dimensional image and arranged on the main surface of the transparent panel, and may be characterized in that multiple reflective surface sets are arranged consecutively in accordance with the design.

[0010] By adopting such a configuration, the position of the reflecting surface is set based on the light-emitting coordinates of the stereoscopic image, so that a clear image without blurring at a fixed point can be obtained from any viewpoint.

[0011] Furthermore, in the stereoscopic image display device according to the present invention, when it is assumed that the observer's viewpoints are located at n viewpoints (n≧2) at equal intervals within a predetermined viewpoint movement range, the reflecting surface sets limit the emission direction to predetermined viewpoint positions, and are provided one at each position where a straight line passing through the viewpoint and the fixed point position intersects with the main surface of the transparent panel, for a total of n reflecting surface sets; the plurality of light rays reflected from the sets of reflecting surfaces corresponding to the respective viewpoint positions are incident on the viewpoints of an observer, thereby allowing the observer to recognize a color three-dimensional image at a fixed position; the n reflecting surface sets are arranged in a matrix to form one pixel; Each set of reflecting surfaces may be arranged at a predetermined position for each viewpoint within the pixel.

[0012] By arranging a group of n reflective surface sets as one pixel in a matrix on a transparent panel, reflective surface sets for n viewpoints are secured in one pixel, making it possible to display a color 3D image regardless of the reflective surface distribution density, which varies depending on the position of a fixed point.

[0013] Furthermore, in the stereoscopic image display device according to the present invention, the light sources may be light sources that emit light of red (R), green (G), and blue (B), respectively.

[0014] By using the three primary colors of light for three light sources, full color can be achieved.

[0015] Furthermore, in the stereoscopic image display device according to the present invention, the reflective surface that reflects the light rays from the three light sources may be characterized in that the luminance is adjusted and mixed to determine the emitted color by gradually changing the area of ​​the reflective surface.

[0016] By adopting such a configuration, it is possible to express colors in a predetermined gradation. Also, by setting the area of ​​the reflecting surface in stages, manufacturing becomes easier.

[0017] Furthermore, in the stereoscopic image display device of the present invention, the set of reflecting surfaces, each of which has a groove angle that reflects light rays from the light source, may be characterized as being a curved reflecting body formed by joining multiple reflecting surfaces while maintaining a reflection direction.

[0018] The combined reflective surface area can be reduced in size by one-third, thereby tripling the number of viewpoints.

[0019] Furthermore, in the stereoscopic image display device according to the present invention, the light source may further include a white (W) light source.

[0020] By adding a single white light source, it is possible to emit bright white light such as highlights.

[0021] Furthermore, in the stereoscopic image display device according to the present invention, the light source may further include a full-color LED.

[0022] By using full-color LEDs, if there are specific areas where you want to change color, you can add animation by changing the color of the pattern by adding full-color light sources equal to the number of specific areas.

[0023] Furthermore, in the above-described stereoscopic image display device according to the present invention, The transparent panel may be provided with a video display device or a decorative object at a distance from the rear side of the transparent panel.

[0024] In the stereoscopic image display device of the present invention, since the transparent panel is the display medium, it is possible to simultaneously view the image displayed on the transparent panel and the image or decorations on the image display device provided on the backside, and therefore it is possible to create an expression that combines both the image and decorations on the backside.

[0025] Furthermore, the stereoscopic image display device according to the present invention may be attached to a gaming machine.

[0026] By incorporating it into an amusement machine, it is possible to make characters pop out from the LCD display located on the back side and appear to be floating in the air in front of the player, or to cover the reels with effects when they appear. [Brief explanation of the drawings]

[0027] [Figure 1] FIG. 1 is an explanatory diagram for explaining the concept of visualizing a stereoscopic image on a stereoscopic image display device 100 according to an embodiment. [Figure 2] FIG. 2 is a simplified diagram of a light beam from a point light source 39 observed from an arbitrary direction. [Figure 3] FIG. 3 is a diagram showing an example in which the reflecting surface 50 is arranged based on a predetermined range of movement of the viewpoint. [Figure 4] FIG. 4 is an explanatory diagram for explaining the viewpoint position and the reflection angle of the reflecting surface 50 formed on the transparent panel 20 of the stereoscopic image display device 100 according to the first embodiment. [Figure 5] FIG. 5 is an explanatory diagram for explaining the shape and angle of the reflective surface 50 formed on the transparent panel 20 of the stereoscopic image display device 100 according to the embodiment. [Figure 6] FIG. 6 is an explanatory diagram illustrating the principle of color stereoscopic viewing in the stereoscopic image display device 100 according to the embodiment. [Figure 7]FIG. 7 is a diagram showing how light rays that are totally reflected inside the transparent panel 20 are incident on the reflecting surface 50. As shown in FIG. [Figure 8] FIG. 8 is an explanatory diagram illustrating a method for arranging the reflective surface group 50H in the stereoscopic image display device 100 according to the embodiment. [Figure 9] FIG. 9 is a diagram showing the arrangement of the reflective surface group 50H in the stereoscopic image display device 100 according to the embodiment. [Figure 10] FIG. 10 is an explanatory diagram illustrating that the arrangement interval of the reflecting surfaces varies depending on the distance between the fixed point and the transparent panel 20 in the stereoscopic image display device 100 according to the embodiment. [Figure 11] FIG. 11 is another explanatory diagram illustrating that the arrangement interval of the reflective surfaces varies depending on the distance between the fixed point and the transparent panel 20 in the stereoscopic image display device 100 according to the embodiment. [Figure 12] FIG. 12 is an explanatory diagram showing an example of the arrangement of the reflective surface set 50h when arranged by the pixels 70 in the stereoscopic image display device 100 according to the embodiment. [Figure 13] FIG. 13 is a front view showing a reflective surface set 50h and a pixel 70 formed on the transparent panel 20 of the stereoscopic image display device 100 according to the embodiment. [Figure 14] FIG. 14 is a front view showing a reflective surface set 50h and a pixel 70 formed on the transparent panel 20 of the stereoscopic image display device 100 according to the embodiment. [Figure 15] FIG. 15 is a perspective view showing the coupling of the reflective surface 50 formed on the transparent panel 20 in the stereoscopic image display device 100 according to the embodiment. [Figure 16] FIG. 16 is an explanatory diagram illustrating a case where a four-viewpoint color image and a four-viewpoint monochromatic three-dimensional image are displayed in the three-dimensional image display device 100 according to the embodiment. [Figure 17] FIG. 17 is an explanatory diagram of a display method for a four-viewpoint color image and a four-viewpoint monochromatic three-dimensional image in the three-dimensional image display device 100 according to the embodiment. [Figure 18]FIG. 18 shows an example of the arrangement of the reflecting surface set 50h in the stereoscopic image display device 100 according to the embodiment when a four-viewpoint color image and a four-viewpoint monochromatic stereoscopic image are displayed. [Figure 19] FIG. 19 is an explanatory diagram illustrating a method for determining the number of emitted colors by the reflecting surface 50 in the stereoscopic image display device 100 according to the embodiment. [Figure 20] FIG. 20 is a diagram showing a color mixing method using a combination of a color light source and a reflecting surface 50. [Figure 21] FIG. 21 shows a state in which only a specific color is changed by adding a full-color light source. [Figure 22] FIG. 22 shows an animation image in which the color of each area is changed by providing full-color light sources and corresponding light-emitting units. [Figure 23] FIG. 23 is another diagram showing an animation image in which full colors are provided as light sources and corresponding light-emitting units are provided to change the color of each area. [Figure 24] FIG. 24 is an explanatory diagram for explaining the deviation of fixed-point display in full-color display. [Figure 25] FIG. 25 is an explanatory diagram for explaining a specific problem of deviation of fixed-point display in the "method of arranging the reflective surface group 50H according to the pixel configuration" and a countermeasure therefor. [Figure 26] FIG. 26 is an explanatory diagram showing the arrangement of a reflective surface set 50h within a pixel 70 formed on a transparent panel 20 in a stereoscopic image display device 100 according to an embodiment. [Figure 27] FIG. 27 is an explanatory diagram for explaining means for adjusting the white balance in the stereoscopic image display device 100 according to the first embodiment. [Figure 28] FIG. 28 is a diagram showing color boundary regions in the stereoscopic image display device 100 according to the first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0028] A stereoscopic image display device 100 according to the present invention will be described in detail below with reference to the drawings. As shown in FIG. 1, the stereoscopic image display device 100 according to the present invention mainly comprises a transparent panel 20 and a light source 30. In the following description of the embodiment, the "principal surface" of the transparent panel 20 refers to the back surface of the transparent panel 20, which constitutes the xy plane. For convenience of explanation, as shown in FIG. 1, the "x-axis" refers to the left-right direction (horizontal direction) if the principal surface of the transparent panel 20 is rectangular, the "y-axis" refers to the up-down direction (vertical direction) perpendicular to the x-axis, and the "z-axis" refers to the direction perpendicular to the principal surface of the transparent panel 20. As shown in Figures 8 and 12, a "stereoscopic image" refers to an image projected by light rays and viewed three-dimensionally by an observer. A "reflective surface 50" refers to an individual surface that reflects light rays from a light source and emits them toward the viewpoint. A "reflective surface set 50h" refers to a collection of reflective surfaces required to display a fixed point that constitutes part of a stereoscopic image. The reflective surfaces reflect light rays from multiple light sources that emit different colors toward a single viewpoint, thereby blending the multiple light rays to determine the emitted color. A "reflective surface group 50H" refers to a set of reflective surfaces for n viewpoints required to display a fixed point that constitutes part of a stereoscopic image. A "pixel 70" refers to the smallest block composed of a set of reflective surfaces for n viewpoints.

[0029] The transparent panel 20 is made of glass or a resin plate having high light transmittance that allows light to pass through. Suitable resin plates include, for example, acrylic resin plates, polycarbonate resin plates, and PET resin plates. Of course, the resin plate is not limited to these resins. A plurality of reflective surfaces 50 are formed on the main surface (rear surface) of the transparent panel 20. The light source 30 is disposed on the upper or lower surface of the transparent panel 20 and emits light rays into the transparent panel 20.

[0030] First, a monochrome display method for stereoscopic viewing using the stereoscopic image display device 100 according to the present invention will be described. Figure 2 is a simplified diagram of light rays from a point light source 39 observed from any direction. The main factors that enable humans to see stereoscopically are (a) binocular parallax, (b) motion parallax, (c) convergence, and (d) accommodation. These are explained below with reference to Figure 2. (a) Binocular disparity allows us to perceive the distance to a point light source based on the difference in the images seen by our left and right eyes. (b) Motion parallax allows us to perceive depth by detecting changes in the appearance of an image as we move our viewpoint. (c) Vergence is the perception of distance relative to the point of gaze based on the principle of triangulation. (d) Accommodation allows the perception of depth by focusing the lens of the eye. While light rays are emitted in all directions from any point light source, only a portion of these light rays enter the viewer's eyes. A stereoscopic image is a collection of such point light sources. Therefore, when reproducing light rays, it is sufficient to reproduce only the light rays that reach a predetermined viewpoint position from among the multiple light rays emitted from the stereoscopic image. The stereoscopic viewing using the transparent panel 20 according to the present invention allows the perception of a stereoscopic image by virtually reproducing the above-mentioned factors (a) to (c). That is, in the case of Figure 2, if the viewer's position (moving viewpoint range) is within the range of viewpoints 1 to 4, it is not necessary to reproduce light rays that do not enter the moving viewpoint range, and it is sufficient to reproduce only light rays that enter the moving viewpoint range.

[0031] Next, the minimum number of light rays required for stereoscopic viewing of fixed point P will be described with reference to FIG. 1. If the predetermined viewpoint position (viewpoint movement range) is on a straight line from 1 to 12, light rays emitted from fixed point P can be expressed by providing a reflecting surface 50 (light-emitting point) on an extension of a straight line connecting each of viewpoints 1 to 12 and fixed point P. Reflecting surface 50 is provided on the rear surface (main surface) of transparent panel 20, and its angle is set so that guided light K from light source 30 disposed on the side of the transparent panel is emitted toward each viewpoint. For example, if the right eye is at viewpoint 7 and the left eye is at viewpoint 5, the difference between the image from 7 seen by the right eye and the image from 5 seen by the left eye is binocular parallax, and the angle of the light rays emitted from fixed point P to 5 and 7 is convergence. When the viewpoint position moves between 1 and 12, the change in the appearance of the changing image is motion parallax.

[0032] Next, the layout of the reflective surfaces 50 corresponding to the viewpoint movement position will be described. When light rays from a fixed point P are emitted toward the viewpoint at an equal angle, a phenomenon occurs in which the light ray density is high in the center and low at both ends when the viewpoint moves in a straight line. By arranging each viewpoint position at equal intervals within a predetermined viewpoint movement range, it is possible to maintain balance and continuity in the light ray density, resulting in easy-to-see stereoscopic vision when the viewpoint moves. Below, an example of arranging the reflective surfaces 50 based on a predetermined viewpoint movement range will be described with reference to Figures 3A to 3C. The viewpoints are positioned at equal intervals, and each viewpoint is connected to a fixed point (P1, P2) by a straight line, and the reflective surfaces 50 are arranged at the points where these lines intersect with the transparent panel 20. Note that Figures 3A to 3C illustrate six viewpoints for ease of illustration. (1) When the predetermined range of movement of the viewpoint is a linear movement parallel to the X axis relative to the transparent panel 20, the reflecting surfaces 50 are arranged on a line parallel to the X axis, as shown in FIG. 3A. (2) When the predetermined range of movement of the viewpoint rotates around the Y axis relative to the transparent panel 20, the reflecting surfaces 50 are arranged on a curved line as shown in FIG. 3B. (3) When the predetermined range of movement of the viewpoint is a linear movement parallel to the Y axis relative to the transparent panel 20, the reflecting surfaces 50 are arranged on a line parallel to the Y axis, as shown in Fig. 3C. However, when the observer's pupil line is parallel to the X axis, binocular parallax does not occur, so at least one more row of reflecting surfaces, i.e., one row for the right eye and one for the left eye, is required.

[0033] Next, the viewpoint position and the reflective surface angle will be described with reference to Figure 4. As described above, when a certain point in the 3D image to be displayed is designated as a fixed point P1, the 3D image display device 100 selects only the light rays that reach the viewer from the light rays emitted in all directions from the fixed point and reproduces these light rays using the reflective surface 50 formed on the main surface of the transparent panel 20 to project the 3D image. In other words, in order to recognize an arbitrary fixed point, light rays equivalent to the light rays emitted from the fixed point must reach the viewer. Therefore, it is necessary to form a plurality of reflective surfaces 50 on the main surface of the transparent panel 20 so that light guided into the transparent panel 20 from the light source 30 arranged on the upper or lower surface of the transparent panel 20 is emitted to the viewer as light rays L1 emitted from the fixed point.

[0034] As shown in FIG. 4, when fixed point P1 is observed from viewpoint 1, a light ray L1'L1 emitted from P1 is visually recognized. However, light ray L1' is a virtual light ray and is not actually emitted from P1. Light guide K1 from light source 30 is reflected at reflecting surface position h1 and emitted toward viewpoint 1, generating light ray L1. Here, the coordinates (h1x, h1y) of reflecting surface 50 at reflecting surface position h1 and the angle (θ1x, θ1y) with respect to the transparent panel are required. The intersection of the line (light ray L1+L1') connecting viewpoint 1 and fixed point P1 with the main surface is the coordinates (h1x, h1y) of reflecting surface position h1, and the angle (θ1x, θ1y) of the line (light ray L1+L1') with the X-axis and the Y-axis is (θ1x, θ1y). From the values ​​obtained in this way, the angle θ in the XY plane is calculated for the main surface (rear surface) of transparent panel 20 as shown in FIGS. 5A and 5B. h1a , angle θ in the Z direction h1b By forming a triangular prism-shaped recessed groove consisting of the above, the surface close to the front side of the transparent panel 20 becomes a reflective surface 50, and light rays can be reflected in a predetermined direction.h1a and reflection angle θ h1b By adjusting the θ h1x and θ h1y This causes the guided light K1 from the light source to be emitted as a virtual light ray L1 as if it were emitted from P1.

[0035] Next, a stereoscopic representation method for color images will be described. In the case of color images, as shown in Fig. 6, three independent light sources 30r, 30g, and 30b, each emitting a different color, are provided on one side of the transparent panel 20, and a reflective surface set 50h is formed by a set of three corresponding reflective surfaces 50r, 50g, and 50b.

[0036] Preferably, the light sources 30 are three independent light sources that emit the three primary colors of light: red (R), green (G), and blue (B) (hereinafter also referred to as [R, G, B]) to add color information to the fixed point P1. When a predetermined viewpoint movement range is set on a line parallel to the X-axis, guided light K1r, K1g, and K1b from the R, G, and B light sources 30 are emitted from the reflective surfaces (50r, 50g, and 50b) toward the viewpoints 1 to 12, respectively. The color of the fixed point P1 is determined by mixing these three light rays. That is, taking the guided light emitted toward viewpoint 1 as an example, the traveling direction of the light rays and the method of manufacturing the reflective surface set 50h will be described. Guided light K1r incident from the light source 30r on the side surface of the transparent panel 20 is emitted radially within the transparent panel 20. The emission direction of the guided light K1r is determined by the reflecting surface 50r at the viewpoint 1, and the light is emitted as a ray L1r toward the viewpoint 1. Similarly, the guided light K1g and the light K1b are emitted as a ray L1g and a ray L1b toward the viewpoint 1 by the reflecting surfaces 50g and 50b. The color of the fixed point P1 is determined by mixing the colors of these three rays L1r, L1g, and L1b.

[0037] An example of an arrangement of a reflective surface set 50h created based on the above concept is shown in Figure 6. The arrangement of the reflective surface set 50h shown in Figure 6 is formed by arranging three reflective surfaces 50 in series in the Y-axis direction, one for red (R), one for green (G), and one for blue (B). A plurality of these are provided in rows in the X-axis direction, the number of which corresponds to the number of viewpoints.

[0038] FIG. 7 illustrates how light rays undergoing total reflection inside the transparent panel 20 enter the reflective surface 50. There is a range of incident angles on the reflective surface 50. When each light source 30 is positioned near the center of the underside of the transparent panel 20, the reflected light rays spread by θc toward the viewpoint, as shown in FIG. 7A. If R1 is the light ray emitted from the Y-axis parallel light, R2 is the light ray emitted from the critical angle reflected light, θa is the reflective surface angle, θb is the critical angle, and θc is the spread of the reflected light, then the R, G, and B light rays intersect within the range of θd, resulting in color mixing. The reflective surfaces 50r, 50g, and 50b for the R, G, and B light rays can be arranged along the Y-axis, as shown in FIG. 7B, to facilitate color mixing. While there is a large overlap in the center of the transparent panel 20 and the overlapping area decreases as one moves left and right across the transparent panel 20, this is an effective method for displaying patterns, enhancing the appearance of colors in the center, where attention tends to be focused.

[0039] Next, a method for arranging the reflecting surface 50 for color stereoscopic viewing will be described.

[0040] (1) Method of arranging the reflective surface group 50H in accordance with the light rays This method limits the direction of light rays emitted from the design that serves as the basis for creating a stereoscopic image and arranges a group of reflective surfaces 50H in accordance with those light rays. The following describes the stereoscopic viewing of the character "I" with reference to FIG. 8. In FIG. 8, fixed points P1 to P4 are located at the -Z position relative to the transparent panel 20, which are characteristic points for constructing the character "I". This method limits the direction of light emission to a predetermined range of viewpoint movement, and arranges the group of reflective surfaces 50H based on the design and arranges them on the main surface of the transparent panel 20. From P1 through P2 to P3, the group of reflective surfaces 50H is arranged continuously in a curved line. Next, by arranging the group of reflective surfaces 50H continuously in a straight line from P2 to P4, the character "I" can be viewed as a stereoscopic image. This method forms lines and surfaces by continuously arranging multiple groups of reflective surfaces 50H at a single point. As shown in FIG. 9, the reflective surface group 50H is configured with R reflective surfaces 50r, G reflective surfaces 50g, and B reflective surfaces 50b, the number of which corresponds to the number of viewpoints. FIG. 9 shows an example for 12 viewpoints, where 12 reflective surface sets 50h, each consisting of an R reflective surface 50r, a G reflective surface 50g, and a B reflective surface 50b, are created. From the right, they are arranged as a reflective surface set for viewpoint 1, a reflective surface set for viewpoint 2, ..., and the leftmost is a reflective surface set for viewpoint 12. In this way, when the number of viewpoints is n, the reflective surface group 50H has n reflective surface sets 50h, the number of which corresponds to the number of viewpoints. Therefore, the reflective surface group 50H requires three times as many reflective surfaces as a single-color reflective surface. For 12 viewpoints, 36 reflective surfaces are required. Therefore, as a method for increasing the density of the reflective surface group 50H, the R reflective surface 50r, the G reflective surface 50g, and the B reflective surface 50b within the reflective surface set 50h can be joined together to eliminate the gaps, thereby improving color mixing, as shown in Figure 9B.

[0041] Next, the distribution of the reflective surfaces 50 will be described. The multiple reflective surfaces 50 will be described with reference to FIG. 10A, taking the case where the number of viewpoints is 12 as an example. As shown in FIG. 10, when creating a reflective surface group 50H corresponding to a fixed point Pa, 12 reflective surface sets 50h must be created to correspond to the 12 light rays emitted from the fixed point Pa based on each viewpoint (1 to 12). If the distance between the observer's eyes is 65 mm, for example, assuming that the distance between viewpoints 5 and 9 is 65 mm and the observer is located at point A, the observer will receive light rays at positions 5 and 9, and will be able to recognize the position of the fixed point Pa. Next, as shown in FIG. 10B, if the fixed point Pb is closer to the main surface of the transparent panel 20 than the fixed point Pa, the spacing between the reflective surfaces 50 will become narrower. If the fixed point is located at (±x, ±y, 0) on the main surface of the transparent panel 20, the light rays will converge at one point, and 12 directions will have to be emitted from one reflective surface. As described above, in the case of this method, the closer fixed point P is to the transparent panel, the narrower the spacing between the reflective surfaces becomes, making it difficult to arrange reflective surfaces for all viewpoints. This can be understood from the following: as shown in Fig. 11, the further back (±x, ±y, +z) the position of fixed point P1 is from the main surface of the transparent panel 20, the wider the spacing between the reflective surfaces 50 in the X-axis direction (Fig. 11A); when fixed point P2 is on the main surface of the transparent panel 20, the spacing between the reflective surfaces 50 disappears and becomes one point (Fig. 11B); and the further forward (±x, ±y, -z) the position of fixed point P3 is from the main surface of the transparent panel 20, the wider the spacing between the reflective surfaces 50 in the X-axis direction (Fig. 11C).

[0042] (2) A method of arranging the reflective surface group 50H according to the pixel configuration Next, a method for photographing a three-dimensional object from a viewpoint direction and arranging the reflective surfaces 50 in a matrix will be described. In this method, a three-dimensional object or a three-dimensional image (CG) is photographed from a predetermined viewpoint movement range, and the reflective surfaces 50 are arranged on the main surface of the transparent panel 20 based on the image. Specifically, when the observer moves horizontally, it is necessary to make the light rays from each fixed point visible by following the viewpoint movement. For example, as shown in FIG. 12, assuming that the observer moves within a movement range (viewpoints 1 to 12), light rays with different emission directions corresponding to the number of assumed viewpoints are required for one fixed point. In other words, if the number of viewpoints is assumed to be n, light rays corresponding to the number of light sources in each of the n directions are required for one fixed point, and therefore n reflective surface sets 50h (reflective surface groups 50H) are required. In order to identify the positions of the n reflecting surface sets 50h relative to the transparent panel 20 and the angles of the reflecting surfaces 50, as shown in FIG. 12, n (n=12 in FIG. 12) cameras (1 to 12) are arranged at equal intervals along the range of movement of the observer, and images of the subject (here, the character "I") to be displayed as a 3D image are taken. Note that the interval between adjacent cameras (1 to 12) is preferably a value obtained by equally dividing 60 mm to 70 mm, which is the distance between the two human eyes. This distance allows both the right eye and the left eye to view one of the cameras 1 to 12. The distance from the cameras (1 to 12) to the transparent panel 20 is set to the same distance as the distance from the observer to the main surface (rear surface) of the transparent panel 20. The gaze points of all cameras (1-12) are set as the origin at the center (X, Y, Z = 0, 0, 0) of transparent panel 20, and the position (XY coordinates) of the light ray emitted from subject (A) and the angle of reflecting surface 50 are determined based on the images captured by each camera (1-12) and the installation position information of the cameras. For example, in Figure 12, the coordinates of the light ray emitted to observer position 1 can be obtained from the image captured by camera 1, and the angle information of reflecting surface 50 can be obtained from the installation position information of camera 1.

[0043] This method of obtaining the position and angle of the reflecting surface 50 from the captured image allows the ridges and surface boundaries of the photographed subject to be accurately captured, making it possible to provide a three-dimensional image even for complex shapes such as multiple overlapping objects or organic shapes.

[0044] Next, a pixel configuration for displaying a color 3D image will be described using 12 viewpoints as an example. In the case of 12 viewpoints, as shown in FIG. 12, a reflective surface set 50h consisting of three reflective surfaces 50 (50r, 50g, 50b) is required for each viewpoint, so one reflective surface group 50H is composed of 3 × 12 = 36 reflective surfaces 50. As shown in the enlarged view of the pixel configuration for fixed point P1, the reflective surface group 50H has 12 reflective surface sets 50h distributed among 12 pixels. As will be described later in this paragraph, each reflective surface set 50h is positioned at a predetermined position for each viewpoint within the pixel. A reflective surface set 50h that reflects light rays from R, G, and B light sources 30r, 30g, and 30b is formed at each target pixel, for example, pixel 70, which is located at the position where a straight line connecting fixed point P1 and viewpoint 1 intersects with the transparent panel 20. Furthermore, since reflective surfaces 50 can be secured for all viewpoints, the 3D image can be viewed from all viewpoints even when Z=0 relative to the transparent panel 20. Furthermore, since the reflective surfaces 50 are set based on color images, the ratio of each reflective surface can be calculated from grayscale R, G, and B images, allowing for complex color settings such as color changes as the viewpoint moves. Similarly, reflective surface sets 50h are formed in corresponding pixels for viewpoints 2 to 12. Thus, with this method, as shown in the enlarged view of the pixel configuration in FIG. 12, the reflective surface sets 50h within a pixel are arranged at predetermined positions for each viewpoint, and a reflective surface for each viewpoint is secured within one pixel. Therefore, a 3D image can be displayed at a fixed position regardless of the reflective surface distribution density at the fixed point. The arrangement of the reflective surfaces 50 within a pixel 70 is not limited to the arrangement shown in the enlarged view of the pixel 70.

[0045] For example, Figure 13 shows an example in which a set of reflecting surfaces 50h, each consisting of three reflecting surfaces 50r, 50g, and 50b, one for each viewpoint, is arranged vertically for five viewpoints. In this case, blank areas 71 may be provided. By providing blank areas 71, the effect of a black matrix can be expected, which prevents adjacent colors from mixing.

[0046] Furthermore, since the number of light rays is equal to the number of reflecting surfaces 50, increasing the number of viewpoints also increases the number of reflecting surfaces 50 constituting one fixed point, which increases the area of ​​one pixel and potentially reduces the resolution of the 3D image. Specifically, as shown in Figure 14, if one reflecting surface set 50h consists of three reflecting surfaces 50r, 50g, and 50b and there are 12 viewpoints, one pixel 70 requires 3 x 12 = 36 reflecting surfaces. As the number of viewpoints increases, the size of one pixel also increases. As a result, if the number of pixels per unit area decreases, the resolution may decrease. To solve this problem, the reflecting surfaces 50 can be combined. By combining independent reflecting surfaces 50 that reflect the three primary color rays from the light source 30, the color mixing effect is enhanced and high density is achieved. Taking a three-viewpoint color reflecting surface arrangement as an example, as shown in Figure 15, when there are three viewpoints, one pixel is composed of three reflecting surface sets 50h formed by reflecting surfaces 50r, 50g, and 50b corresponding to the three light sources, arranged in three rows for each viewpoint. These evenly spaced red (R), green (G), and blue (B) reflective surfaces 50r, 50g, and 50b each have a predetermined length (for adjusting brightness) and angle (for adjusting the reflection direction). When the three color reflective surfaces 50r, 50g, and 50b are combined around the reflective surface 50 while maintaining the reflective direction of the reflective surface 50, they can be combined into three bent reflective surfaces 56, as shown in Figure 15B. The reflective surface area combined in this way can be reduced to one-third its original size, as shown in Figure 15C, thereby tripling the number of viewpoints.

[0047] Furthermore, in this embodiment, a composite image display in which light sources 30 (30r, 30g, 30b) are provided on the lower side of the transparent panel and 35 (monochromatic light source) is provided on the right side will be described with reference to FIGS. 16 and 17 . By separately providing, for example, monochromatic light sources 35 on the side and providing a reflective surface for light source 35, stereoscopic image A can be displayed using light source 30 from the lower or upper side as shown in FIG. 16A , and stereoscopic image B can be displayed using light source 35 from the adjacent side, i.e., the right or left side, as shown in FIG. 16B . Light rays from monochromatic light sources 35 on the side are emitted in a radially diverging manner (totally reflected light rays). Reflective surfaces 57 (57h1, 57h2, 57h3, 57h4) are formed to reflect light rays from the monochromatic light sources on the side toward the front. By simultaneously lighting light source 30 and monochromatic light source 35, a composite image of stereoscopic images A and B can be displayed as shown in FIG. 16C . As shown in FIG. 17 , fixed point Pa is an arbitrary light-emitting point on stereoscopic image A. Fixed point Pb is an arbitrary light-emitting point on stereoscopic image B. Taking incident light at viewpoint 1 as an example, guided light K1r, K1g, and K1b emitted from light source 30 are reflected by reflective surface set 50h1 and emitted to viewpoint 1. Guided light M1 emitted from light source 35 is reflected by reflective surface 57h1 and emitted to viewpoint 1. In this way, guided light K1r, K1g, and K1b from light source 30 displays only stereoscopic image A and is not affected by guided light M1 from light source 35. Conversely, guided light M1 from light source 35 displays only stereoscopic image B and is not affected by guided light K1r, K1g, and K1b from light source 30. Therefore, if stereoscopic image A is to be displayed, light source 30 should be illuminated, and if stereoscopic image B is to be displayed, light source 35 should be illuminated. Furthermore, by simultaneously emitting light from light source 30 and light source 35, stereoscopic images A and B can be simultaneously displayed.

[0048] When a side light source 35 is provided, the arrangement of the reflective surfaces 50 and 57 within a pixel 70 requires a reflective surface group 50HA for stereoscopic image A and a reflective surface group 57HB for stereoscopic image B. FIG. 18 shows examples of reflective surface arrangements for a four-viewpoint color image and a four-viewpoint monochrome stereoscopic image. Regarding the details of one pixel 70, for stereoscopic image A, three reflective surfaces 50r, 50g, and 50b for each light source (R, G, B) form one viewpoint, so 3 (reflective surfaces 50r, 50g, and 50b) × 4 (number of viewpoints) = 12 reflective surfaces 50 are required. For stereoscopic image B, one reflective surface 57 for a monochrome light forms one viewpoint, so 1 × 4 = 4 reflective surfaces 57 are required for four viewpoints. In the case of four viewpoints, 16 reflective surfaces 50 and 57 are required for stereoscopic images A and B. By forming one pixel with 4 × 4 reflective surfaces 50 and 57, an aspect ratio of 1:1 is achieved. In this embodiment, the reflective surface set (RGB) for 3D image A is arranged vertically, and the reflective surface for 3D image B is arranged within the same pixel. Note that if there are five viewpoints, 20 reflective surfaces are required: 3 reflective surface sets (RGB) for 3D image A × 5 + 5 reflective surfaces for 3D image B = 20 reflective surfaces. However, to achieve an aspect ratio of 1:1, if the 3 reflective surface sets (RGB) for 3D image A × 5 + the number of reflective surfaces for 3D image B is 10, for a total of 25 reflective surfaces, 3D image B can be viewed from 10 viewpoints. This allows for efficient reflective surface arrangement, and by increasing the number of viewpoints for 3D image B, the effect image can be displayed more smoothly. Note that although the three reflective surfaces 50r, 50g, and 50b for each light source (R, G, B) are arranged horizontally in FIG. 18 , they may also be arranged vertically. In this case, the reflective surface 57 for a single color is arranged horizontally to achieve an aspect ratio of 1:1. In other words, the arrangement of reflective surfaces shown in FIG. 18 may be rotated 90 degrees clockwise.

[0049] Next, we will explain how to determine the emitted color. The color of light is determined by the balance of brightness of the light emitted by the reflective surface set 50h, which consists of three reflective surfaces (50r, 50g, 50b) that reflect light from red (R), green (G), and blue (B) light sources (30r, 30g, 30b). For example, in the case of a two-tone (undivided) display in Figure 19, as shown in the three light source column, if the emitted colors are combined with or without reflective surfaces, as shown in the three light source column, red, green, blue, yellow, cyan, magenta, white, and skeleton (transparent), eight colors can be expressed: red (2) x green (2) x blue (2) = eight colors (including transparent). The number of colors can be further increased by adjusting the reflective area of ​​each reflective surface 50 to adjust the brightness. For example, if the area of ​​the reflective surface 50 is divided into four in stages, it is possible to emit light with five levels of brightness: 0%, 25%, 50%, 75%, and 100%, as shown in the column for three light sources with five gradations (four divisions) in Figure 19. Therefore, it is possible to express red (5) x green (5) x blue (5) = 125 colors (including transparent). In this way, the number of colors that can be expressed can be selected by the number of divisions. In other words, if the number of divisions of the reflective surface area of ​​each reflective surface 50 is n, then (n+1) x (n+1) x (n+1) = (n+1) 3It is possible to express a number of colors (n: natural number). While the above description assumes that the light source 30 has three colors, this is not limited to three, and a white (W) light source may be added. For example, if a white (W) light source 30w is added to make the light source colors four, and the brightness of each reflective surface is adjusted to six gradations, then as shown in the column for four light sources with six gradations (five divisions) in Figure 19, it is possible to reproduce 1,286 colors: red (6) x green (6) x blue (6) x white (6) - 10 = 1,286. Generally, to express white using the three primary colors of light, the light intensities of red (R), green (G), and blue (B) must be equal, but this adjustment is difficult. Adding a monochromatic white light source makes it possible to express a pure, clean white color. This allows for an increase in highlights and bright colors, resulting in a more defined image display. In this way, the number of colors is determined by the number of color light sources and the number of gradations on the reflective surface. As shown in Figure 19, in the case of a single color, only gradation expression is possible, but in the case of two colors, deep hues can be expressed by selecting the color of the light source to match the main color of the design. By using three colors, color expression becomes possible. By adding white to this, as mentioned above, pure white can be ensured, allowing for clear highlight expression.

[0050] As shown in columns (6) to (8) for Type A in Figure 20 (number of color light sources: 3 (R, G, B), number of reflective surfaces: 3), brightness and saturation can be adjusted by emitting the three primary colors of light—red (R), green (G), and blue (B)—at the same brightness (equal area ratios for each reflective surface). Brightness can be adjusted by changing the area of ​​each reflective surface while maintaining the same area ratio. For example, if the brightness of the light source alone is 100%, then R (100%), G (100%), and B (100%) will produce white (6), and R (50%), G (50%), and B (50%) will produce gray (7). For chromatic colors, brightness can be adjusted by increasing or decreasing the proportion of the white component relative to the primary color. To adjust saturation, with a pure color being 100%, the saturation can be reduced by reducing the area of ​​the reflection that makes up the primary color and increasing the area of ​​the remaining reflection surfaces, thereby lowering the saturation while maintaining the brightness (see (1) and (10) and (5) and (13)).

[0051] Furthermore, compared to single colors, color requires mixing colors, which increases the number of reflective surfaces. Increasing the number of reflective surfaces per pixel results in a decrease in resolution and affects the brightness of the image. Therefore, we will explain Type B (number of color light sources: 4 (R, G, B, W), number of reflective surfaces: 2) as a method of expressing color by reducing the number of reflective surfaces.

[0052] The number of reflective surfaces can be reduced by adding a monochromatic white light source in addition to the light sources of the three primary colors. Specifically, this method involves mixing a color that is typically mixed with three colors with two. For example, for color (3), green-blue, with Type A, mixing is performed using 0% R reflective surface, 50% G reflective surface, and 100% B reflective surface. The R reflective surface is not actually used, and the color mixture is achieved using only two surfaces: the G reflective surface and the B reflective surface. Therefore, any color on the color wheel can be expressed with two reflective surfaces. Type B's reflective surface set does not have fixed R, G, and B reflective surfaces, but rather two free reflective surfaces, since the light source color for mixing is selected to match the fixed luminous color. Next, considering brightness and saturation, the white color produced by 100% R reflective surface, 100% G reflective surface, and 100% B reflective surface cannot be achieved by mixing using only two surfaces, so a monochromatic white light source is added to the light source. Next, when it comes to adjusting brightness and saturation, the brightness of achromatic colors is adjusted by increasing or decreasing the reflective surface area of ​​the added white monochromatic light source. For chromatic colors, brightness is also adjusted by increasing or decreasing the proportion of the white component. However, if two components remain after subtracting the white component from the desired luminous color, mixing cannot be performed using only two surfaces. For example, if the desired luminous color is pink (9), mixing can be performed by adding 50% red (R) and 50% white (W). However, sky blue (12) cannot be mixed using only two surfaces because subtracting the white (W) component (50% each for R, G, and B) leaves only two components: 50% green (G) and 50% blue (B). Similarly, when adjusting saturation, if two components remain after subtracting the white (W) component from the desired luminous color, mixing cannot be performed using only two surfaces (see aqua blue (13)). As mentioned above, although the number of color representations for Type B is smaller than that for Type A, it is still an effective means of reducing the number of reflective surfaces and increasing display resolution. The Type B column in Figure 19 lists methods for using reflective surfaces that result in color representations equivalent to those of Type A.

[0053] Next, we will explain Type C, a method that uses a single white color rather than a mixture of the three primary colors. Type C adds a single white light source in addition to the three primary color light sources, and by designating one of the three reflective surfaces as a dedicated white reflective surface, while the remaining two reflective surfaces are free reflective surfaces that select the light source color for mixing according to the light color of the fixed point, it is possible to create a white color without color bias. Type A creates a white color by mixing 100% R reflective surface, 100% G reflective surface, and 100% B reflective surface. This method results in differences in the brightness of the light guided from each color light source depending on whether the display's light source is close to or far from the light source, resulting in color variation. In the case of white, if the uniformity of R, G, and B is lost, it becomes difficult to create a pure white color. Therefore, by assigning only the white component to a dedicated reflective surface, discoloration due to color mixing can be suppressed. For example, in Type A, sky blue (12) is created by mixing 50% R reflective surface, 100% G reflective surface, and 100% B reflective surface. In the C type, this is treated as a mixture of 50% white (W), 50% green (G), and 50% blue (B). The white component that forms the base of the color is emitted from 50% of the reflective surface dedicated to white, and the remaining 50% green (G) and 50% blue (B) are emitted from two free reflective surfaces, making it possible to express vivid colors with little color unevenness.

[0054] Although the above description has been given of the light source 30 of the three primary colors and white, the present invention is not limited to this and a color light source such as yellow (Y) may be added. Using the three primary colors makes it possible to mix colors on the color wheel, but even if a specific color system needs to be expressed in more detail, the number of colors is determined by the number of divisions of the reflective surface, so it is not possible to increase the number of colors for only that specific color system. Therefore, as a solution to this problem, adding a fourth color to the light source increases the number of specific color combinations.

[0055] Furthermore, if you want to emphasize a particular color, you can increase the brightness of the main color by increasing the number of reflective surfaces of the color you want to emphasize. For example, normally, one reflective surface set has one reflective surface that shines red, but by providing two red reflective surfaces 50r per reflective surface set 50h, you can double the brightness of the red color. This is an effective method when you want to use a particular color as the main color.

[0056] Furthermore, by using full-color LEDs, if there are specific areas where you want to change the color, you can add animation by changing the color of the pattern by providing as many full-color light sources as there are specific areas. For example, by adding a full-color LED as the fourth light source color, you can change the color of the word "CHANCE" from green to red, as shown in Figure 21, and only change the color of the specific area. Furthermore, as shown in Figure 22, by providing full-color LED_A, full-color LED_B, and full-color LED_C as light sources and providing corresponding pattern light-emitting units for the specific areas, you can change the color of each area.

[0057] In addition, by providing gradation to the reflective surface of each specific area, it is possible to increase the number of patterns with shadows. As shown in Figure 23, by arranging full-color LEDs in each specific area, it is possible to freely change the color of the pattern.

[0058] Next, the phenomenon of misalignment of fixed-point display when using the "method of arranging the reflective surface group 50H based on pixel configuration" and countermeasures will be described with reference to FIGS. 24 and 25. Because multiple reflective surfaces 50 are formed within one pixel 70, increasing the number of reflective surfaces (number of cameras) within one pixel 70 can affect the position of the stereoscopically viewed image. FIG. 24 is a perspective view showing the relationship between the arrangement of the reflective surface group and the position at which fixed point P is viewed with both eyes. If the interpupillary distance of the observer is the distance between viewpoints 1 and 3, viewpoint 1 is the light ray (L1b+L1g+L1r) incident on the left eye, and viewpoint 3 is the light ray (L3b+L3g+L3r) incident on the right eye. Parallax occurs due to the difference in the light rays incident on both eyes, and fixed point P is viewed. At this time, the viewed fixed point P is projected onto projection position a. Similarly, when the observer moves in the X-axis direction within a predetermined viewpoint movement range and the projection positions viewed from fixed point P are projected onto the transparent panel, they become projection positions a to j (collectively referred to as a total projection position 60).

[0059] In the "method of arranging the reflective surface group 50H in accordance with the light rays," fixed point P appears to stay in one place when the observer moves from viewpoint 1 to viewpoint 12. When the viewing position is projected onto a transparent panel, it forms a locus parallel to the X-axis at equal intervals, as shown in Figure 25A. Similarly, when the "method of arranging the reflective surface group 50H using pixel configuration" is used, fixed point P does not appear to stay in one place when the observer moves from viewpoint 1 to viewpoint 12. This is because the reflective surface set 50h for each viewpoint is arranged according to the pixel array, so the position of the reflective surface 50 within the pixel 70 varies depending on the viewpoint position, resulting in a shift in the display position of fixed point P. When arranging the reflective surface sets using pixel configuration, if the reflective surface sets 50h are arranged in order of viewpoint number from the top left, the projected viewing position will be as shown in Figure 25B. When moving from a to j, it can be seen that the viewing position of fixed point P shifts in a wavy manner in the X-axis and Y-axis directions relative to the ideal fixed-point display position (the area surrounded by dotted lines). This means that when the observer moves back and forth within a predetermined range of viewpoint movement, fixed point P appears to sway in the X-axis and Y-axis directions. To solve these problems, at the pixel configuration stage, viewpoints (reflecting surface sets) corresponding to the interpupillary distance can be arranged diagonally within the pixel, thereby minimizing the misalignment of the display of fixed point P (see Figure 25C). In other words, by adjusting the positions within the pixel of the reflecting surfaces of the reflected light rays so that fixed point P formed by the light rays observable with the right eye and the light rays observable with the left eye approaches the ideal fixed point position, the misalignment of the display of fixed point P can be reduced.

[0060] Specifically, to minimize the movement of the 3D image due to the movement of the viewpoint, it is advisable to connect the reflecting surfaces 50 determined by the combination with straight lines and concentrate the fixed points generated at the midpoints of the line segments as close to the center of the pixel 70 as possible. For example, when the number of reflecting surfaces is 12 viewpoints x 3 = 36, the midpoints can be concentrated near the center by arranging them as shown in Figure 26A. When the number of reflecting surfaces is 12 viewpoints x 2 = 24, the midpoints can be concentrated near the center by arranging them as shown in Figure 26B. Furthermore, when the free reflecting surface 2 and the wide reflecting surface 1 are arranged with respect to viewpoint 12 as shown in Figure 26C, the midpoints can be concentrated near the center.

[0061] The following describes how to dim white using three light sources (30r, 30g, 30b) for each of the R, G, and B light sources. The dimming method should be the so-called PWM (Pulse Width Modulation) method. Specifically, as shown in Figure 27, when dimming white, a reference area is required for each light source (R, G, and B) to illuminate uniformly. If a white area exists within the displayed image, dimming is performed using that area as the reference area. If there is no white area within the displayed image, a test pattern T1 is located in the center of the bottom of the transparent panel, or two test pattern areas T2 and T3 are located in each of the lower left and right corners. The test pattern T1 is located in the center of the bottom, allowing the three light sources (R, G, and B) to be incident almost uniformly. The test patterns T2 and T3 require confirmation of the white color at both the left and right corners because the light source positions differ at the lower left and right corners, preventing uniformity of the light rays (R, G, and B).

[0062] Next, a color boundary processing method will be described with reference to FIG. 28. At the point where the blue region BR and the red region RR meet, i.e., the color boundary BO, as shown in FIG. 28B, the adjacent luminous colors may affect each other, resulting in color unevenness. This is due to color mixing caused by the continuous matrix arrangement of the reflective surface sets 50h for each light source (R, G, B). This method is effective for intentionally blurring the boundary or achieving a gradation effect. On the other hand, if you want to clearly separate the color regions, color mixing can be suppressed by providing a non-luminous region (a region without a reflective surface) at the boundary BO between the blue region BR and the red region RR, as shown in FIG. 28C. Furthermore, providing a non-luminous region creates a black matrix effect, improving the color appearance of the blue and red boundary BO. Of course, this boundary processing method is not limited to blue and red, but is effective for any color boundary.

[0063] The stereoscopic image display device 100 according to the present invention displays images through the transparent panel 20, so the rear side can be seen. Therefore, by placing a display device such as a liquid crystal display that displays images or a decoration such as a character at a distance on the rear side, it is possible to display an image as if it were projected onto the image or decoration on the rear side.

[0064] The 3D image display device according to the embodiment can be used as various 3D image display devices, such as a 3D image display device for effects in gaming machines. By incorporating it into a pachinko gaming machine or a slot machine, it is possible to create effects such as characters popping out from the LCD display located on the back side and floating in the air in front of the machine, or effects that cover the reel objects when they appear. [Industrial Applicability]

[0065] As shown in the above-described embodiment, the present invention can be industrially utilized as various display devices such as a stereoscopic image display device for effects in gaming machines. [Explanation of symbols]

[0066] 20...transparent panel, 30...light source, 30r...R light source, 30g...G light source, 30b...B light source, 30w...W light source, 35...side light source, 39...point light source, 50...reflective surface, 50r...reflective surface for R, 50b...reflective surface for B, 50g...reflective surface for G, 50h...reflective surface set, 50H...reflective surface group, 51...reflective surface, 52...reflective surface, 54...reflective surface, 56...reflective surface body, 57...reflective surface, 57HA, 57HB...reflective surface group, 70...pixel, 71...blank portion, 100...3D image display device

Claims

1. A transparent panel and a plurality of light sources emitting light of different colors arranged on one side of the transparent panel; a reflecting surface set on a main surface of the transparent panel, the reflecting surface set having groove angles that reflect light rays from the plurality of light sources to a viewpoint of an observer, the reflecting surface set determining a color at one fixed point for one viewpoint of the observer; Equipped with Assuming that the observer's viewpoints are located at n viewpoints (n≧2) at equal intervals within a predetermined viewpoint movement range, the reflecting surface sets are each provided at a position where a line passing through the viewpoint and the fixed point position intersects with the main surface of the transparent panel, with one reflecting surface set in total being n; a plurality of light rays reflected from the sets of reflecting surfaces corresponding to the respective viewpoint positions are incident on the viewpoints of the observer, thereby allowing the observer to recognize a color three-dimensional image at the fixed point position; the n reflecting surface sets are arranged in a matrix to form one pixel; A stereoscopic image display device, characterized in that each set of reflecting surfaces is disposed at a predetermined position for each viewpoint within the pixel.

2. In the stereoscopic image display device according to claim 1, The three-dimensional image display device further comprises an image display device or a decorative object on the rear side of the transparent panel at a distance therefrom.

3. A gaming machine characterized by being equipped with a stereoscopic image display device as described in claim 1 or 2.

Images