CN102169282B - Multi-view desktop 3D display device - Google Patents

Abstract

The invention discloses a multi-view desktop type three-dimensional display device, comprising two projector arrays which are symmetrically distributed, two longitudinal diffusion screens and a desktop structure, wherein the first projector array is placed at one side of the first longitudinal diffusion screen; the second projector array is placed at one side of the second longitudinal diffusion screen; the desktop can be a square-hole-shaped desktop or middle-opened L-shaped desktop; the two longitudinal diffusion screens are embedded in the desktop structure to form a V shape, a right angle, a trapezoid or an arc; and the two projector arrays project images to the center of the desktop through the corresponding diffusion screens. The multi-view desktop type three-dimensional display device provided by the invention has the advantages that high image resolution and high view resolution can be generated and exquisite transverse-parallax three-dimensional images can be observed in large field ranges of two sides or one side of the desktop. Through the structure of embedding in the desktop, the suspension effect of the three-dimensional images can be realized. Relative to a single naked-eye stereoscopic display, the split joint of the three-dimensional images can be realized via the setting of multi-projection so that the space scale of the three-dimensional images is greatly increased.

Description

Multi-view desktop 3D display device

technical field

The invention relates to a three-dimensional display device, in particular to a multi-view desktop three-dimensional display device.

Background technique

Display technology is developing towards high-definition, three-dimensional panoramic display. The difference between three-dimensional display and traditional two-dimensional display is to bring visual depth perception to the viewer through various methods, so that it can naturally and unnaturally obtain the third-dimensional information in the picture. Many 3D display technologies at home and abroad can generally be divided into two types: holographic 3D display and non-holographic 3D display. Holographic three-dimensional display is known as the ideal three-dimensional display method in the future because it is a true three-dimensional information recording and display, but it requires a high-resolution spatial light modulator and an ultra-high-speed data processing system in terms of dynamic display. The earth has limited the advancement of this technology so that it cannot be well applied to practical applications, and is currently only applicable to the capture and display of static images. Therefore, non-holographic 3D display is currently the mainstream display technology, and the technology to realize non-holographic 3D display can generally be divided into volumetric 3D display, integrated imaging 3D display, and stereoscopic 3D display. Both volumetric 3D display and stereoscopic 3D display have good display devices. However, most of the display devices based on these two methods rely on rotating screens to meet the needs of viewing from all angles, so the structure of the display device is relatively complicated and the cost is high. . The traditional integrated imaging 3D display technology has many problems to be solved in terms of the number of viewing angles, image crosstalk, depth and size of the display area, etc. the

Most naked-eye three-dimensional display devices that have been developed so far only have a stereoscopic viewing angle in one direction, and have no stereoscopic viewing angle in another direction, so they lack specific practical applications. Moreover, the image resolution displayed by a single naked-eye stereoscopic display is low, the viewing angle is small and discontinuous, and the sense of depth is not enough, which makes its application in the field of military simulation and sand table deduction lack of innovation. The main purpose of the present invention is to construct a three-dimensional display device that displays two sides of the desktop and can see the respective sides of the three-dimensional image, and satisfies the demands of multiple viewing angles by multiple people. The advantage is that it can produce high image resolution, high viewing angle resolution, and three-dimensional images with delicate lateral parallax can be viewed on both sides of the desktop. The delicate viewing angle interval will bring the observer a completely continuous and jump-free three-dimensional perception, reducing the fatigue caused by the discontinuous viewing angle in conventional three-dimensional display. The structure embedded in the desktop can realize the floating effect of the three-dimensional image, satisfying the appeal of multiple people watching at the same time, multiple angles, and touching. At the same time, the relative projection on both sides of the desktop is used to realize the splicing of three-dimensional images, which can increase the spatial scale of the three-dimensional images.

Integrating the advantages of traditional 3D display technology, the innovative desktop 3D display device design can be widely used in military sand table deduction, medical simulation, game competitions, real estate sales demonstrations and other fields.

Contents of the invention

The object of the present invention is to overcome the deficiencies of the prior art and display devices, and provide a multi-view desktop three-dimensional display device.

The multi-view desktop three-dimensional display device includes a first projector array, a second projector array, a first longitudinal scattering screen, a second longitudinal scattering screen, a back-shaped desktop and a groove, and a first longitudinal The diffusing screen and the second longitudinal diffusing screen, the first longitudinal diffusing screen and the second longitudinal diffusing screen form a groove, the shape of the groove is V-shaped, right-angled, trapezoidal or arc-shaped, and the first projector array is placed on the second One side of a longitudinal scattering screen is projected onto the other side of the first longitudinal scattering screen for imaging, and the second projector array is placed on one side of the second longitudinal scattering screen and projected onto the other side of the second longitudinal scattering screen for imaging.

The multi-view desktop three-dimensional display device includes a first projector array, a second projector array, a first longitudinal scattering screen, a second longitudinal scattering screen, an L-shaped desktop with a central opening, and the lower and rear openings of the L-shaped desktop with a central opening. There are a first longitudinal diffusion screen and a second longitudinal diffusion screen, the first longitudinal diffusion screen and the second longitudinal diffusion screen form a right angle, the first projector array is placed under the first longitudinal diffusion screen and projected onto the first longitudinal diffusion screen For imaging, the second projector array is placed behind the second longitudinal scattering screen and projected to the front of the second longitudinal scattering screen for imaging.

The first longitudinal scattering screen and the second longitudinal scattering screen are transmissive cylindrical gratings or optical holographic screens with the same longitudinal scattering characteristics, the direction of the transmissive cylindrical grating grid lines and the back-shaped desktop or L-shaped desktop surface with an opening in the middle parallel. The first projector array and the second projector array are arrays composed of multiple projectors, or composed of two-dimensional displays and lens arrays. The two-dimensional display is LCD, LCOS, PDP, LED, CRT, OLED or projector.

The present invention can produce three-dimensional images with high image resolution and high viewing angle resolution. The dual-projector array provides the multi-viewing range required for conventional desktop display applications, and can display a series of continuous images within the viewing range of each direction. 3D image from perspective. The fine viewing angle interval will bring continuous and jump-free three-dimensional perception to the observer, while the multi-viewing area and touchable desktop display design provide great prospects for the application of three-dimensional display in a wider range of fields.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Figure 1(a) is an overall schematic diagram of a multi-view desktop three-dimensional display device (in the form of a back-shaped desktop);

Figure 1(b) is an overall schematic diagram of a multi-view desktop three-dimensional display device (L-shaped desktop form);

Fig. 2(a) is a longitudinal section view 1 of the imaging principle of the multi-view desktop three-dimensional display device;

Fig. 2(b) is a second longitudinal sectional view of the imaging principle of the multi-view desktop three-dimensional display device;

Fig. 3 is a top view of the imaging principle of the multi-view desktop three-dimensional display device;

Fig. 4 is a schematic diagram of an array composed of a two-dimensional display and a projection lens;

Fig. 5(a) is a schematic diagram of the structure of a groove-shaped longitudinal scattering screen;

Figure 5(b) is a schematic diagram of the structure of the groove-shaped longitudinal scattering screen II;

Fig. 6 is a schematic diagram of the observation effect of the center of the groove structure observed from the right viewpoint.

In the figure, a first projector array 1 , a second projector array 2 , a first longitudinal scattering screen 3 , a second longitudinal scattering screen 4 , a back-shaped desktop 5 , a groove 6 , and an L-shaped desktop 7 with an opening in the middle.

Detailed ways

As shown in Figure 1(a), the multi-view desktop three-dimensional display device (in the form of a back-shaped desktop) includes a first projector array 1, a second projector array 2, a first longitudinal scattering screen 3, and a second longitudinal scattering screen 4 , a back-shaped desktop 5 and a groove 6, a first longitudinal scattering screen 3 and a second longitudinal scattering screen 4 are arranged below the opening of the back-shaped desktop 5, and the first longitudinal scattering screen 3 and the second longitudinal scattering screen 4 form a groove 6 , the shape of the groove 6 is V-shaped, right-angled, trapezoidal or arc-shaped, the first projector array 1 is placed on one side of the first longitudinal scattering screen 3 and projected onto the other side of the first longitudinal scattering screen 3 for imaging, The second projector array 2 is placed on one side of the second longitudinal scattering screen 4 and projects onto the other side of the second longitudinal scattering screen 4 to form an image.

As shown in Figure 1(b), the multi-view desktop three-dimensional display device (L-shaped desktop form) includes a first projector array 1, a second projector array 2, a first longitudinal scattering screen 3, and a second longitudinal scattering screen 4 , L-shaped desktop 7, a first longitudinal scattering screen 3 and a second longitudinal scattering screen 4 are arranged below and behind the middle opening of the L-shaped desktop 7, the first longitudinal scattering screen 3 and the second longitudinal scattering screen 4 form a right angle, the first The projector array 1 is placed below the first longitudinal scattering screen 3 and projected onto the first longitudinal scattering screen 3 for imaging, and the second projector array 2 is placed behind the second longitudinal scattering screen 4 and projected to the front of the second longitudinal scattering screen 4 imaging.

The first longitudinal scattering screen 3 and the second longitudinal scattering screen 4 are transmissive cylindrical gratings or optical holographic screens with the same longitudinal scattering characteristics, the direction of the transmissive cylindrical grating grid lines and the back-shaped desktop 5 or the middle opening L Shaped desktop 7 surfaces are parallel. The first projector array 1 and the second projector array 2 are arrays composed of multiple projectors, or composed of two-dimensional displays and lens arrays.

The two-dimensional display is LCD, LCOS, PDP, LED, CRT, OLED or projector.

The working process of the present invention is described as follows in conjunction with accompanying drawings:

The structural form of the multi-view desktop 3D display device can be a projection form in which the back-shaped desktop is symmetrically arranged on the left and right, as shown in Figure 1(a), or a projection form in which the L-shaped desktop with the middle opening is arranged at right angles, as shown in Figure 1 (b) shown. The viewing range of the device shown in Figure 1(a) is the viewing angle on both sides above the back-shaped desktop, and the viewing points on both sides can only watch the corresponding view image information of the objects in the viewing angle. The viewing range of the device shown in Figure 1(b) is the front and upper viewing angles of the L-shaped desktop with the middle opening, that is, the viewing angles on both sides of the right-angled bisector, and the viewing points on both sides can only watch the image information of the corresponding view of the object in the viewing angle.

Taking the back-shaped desktop form as an example, as shown in Figure 2(a), the multi-view desktop three-dimensional display device includes two sets of projector arrays embedded in the back-shaped desktop 5, a set of grooves 6, and the projector array includes a first projection The projector array 1 and the second projector array 2, the groove 6 includes a first longitudinal scattering screen 3 and a second longitudinal scattering screen 4 arranged symmetrically in a groove shape. Due to the symmetry of the mechanism, taking one side as an example, the projector array 1 and the longitudinal scattering screen 3 are arranged in sequence, and the image of each projector in the projector array is a vertical bar of images from different perspectives of the three-dimensional object. The images are spliced together, and each projection system projects each vertical image onto the longitudinal scattering screen, and the projected light direction of the vertical image is the same as the viewing angle direction to which it belongs. The cylindrical grating used by the first longitudinal scattering screen 3 and the second longitudinal scattering screen 4 should be parallel to the back-shaped desktop 5 in the direction of the grating lines. The view observed by the viewpoint located on the side of the first projector array 1 is contributed by the second projector array 2, and the view observed by the viewpoint located on the side of the second projector array 2 is provided by the first projector array 1 Yes, on both sides, only the view with the corresponding perspective of the object can be observed, but the view of the opposite perspective cannot be observed.

（当二者相等时，相当于桌面两侧视角在垂直桌面中心处无缝拼接），保证只在对侧视角获得合适的观看范围并且光线不会被回字形桌面5和凹槽6的边缘阻挡，在第二投影机阵列2一侧视角观看得到三维物体对应视角的信息由第一投影机阵列1投影的视图提供，在第一投影机阵列1一侧视角观看得到三维物体对应视角的信息由第二投影机阵列2投影的视图提供。 As shown in Figure 2 (b), the first projector array 1 projects images to the same position on the first longitudinal scattering screen 3, and the second projector array 2 projects images to the same position on the second longitudinal scattering screen 4, and the two After the projected image is imaged, the light field is spliced and reconstructed at the center of the groove 6 . Longitudinal scattering angles of the first longitudinal scattering screen 3 and the second longitudinal scattering screen 4 Should be less than or equal to the angular separation between the first projector array 1 and the second projector array 2

(When the two are equal, it means that the viewing angles on both sides of the desktop are seamlessly spliced at the center of the vertical desktop), ensuring that only the opposite viewing angle can obtain a suitable viewing range and that the light will not be blocked by the back-shaped desktop 5 and the edge of the groove 6 The information corresponding to the viewing angle of the three-dimensional object obtained by viewing the viewing angle on the side of the second projector array 2 is provided by the view projected by the first projector array 1, and the information corresponding to the viewing angle of the three-dimensional object obtained by viewing the viewing angle on the side of the first projector array 1 is provided by The view projected by the second projector array 2 is provided.

As shown in FIG. 3 , the projectors P1-Pn in the first projector array 1 each project toward the longitudinal scattering screen 3 , and will form an image in the center of the groove 6 and correspondingly form V1-Vn viewpoints on the right side. Looking at the projector array 1 through the longitudinal scattering screen 3, it is found that the exit pupils of all the projectors will be diffused in the vertical direction to form a vertical bar, and the width in the horizontal direction will remain unchanged, so that the concave hole can be observed from different viewpoints V1-Vn on the right. Different views can be seen in the center of the field of view of slot 6, and the complete view observed at any viewpoint is spliced by a vertical image projected by each projector, so that it can be observed at different viewpoints by n The view of a three-dimensional object composed of three vertical image blocks corresponding to the angle of view, and the images of each viewpoint change continuously, so as to achieve the viewing effect of lateral parallax on the right side. The imaging principles of the second projector array 2 and the second longitudinal scattering screen 4 are consistent with this.

The first projector array 1 and the second projector array 2 are respectively composed of a plurality of projectors P1-Pn, Q1-Qn arranged horizontally. To provide a more detailed viewing angle interval, the projector lenses can be arranged longitudinally in a misaligned manner according to actual needs and sizes, keeping the horizontal distance between two adjacent projectors constant, and maintaining uniform projection to the same position on the directional diffusion screen.

As shown in FIG. 4 , the projector array may also be composed of a two-dimensional display and a lens array arranged at equal intervals vertically and horizontally.

As shown in Figure 5, the first longitudinal scattering screen 3 and the second longitudinal scattering screen 4 are both transmission-type cylindrical gratings with a certain scattering angle in the longitudinal direction and no scattering in the lateral direction, ensuring that the upper left of the groove 6 Observers in the viewing space and the upper right can see the outgoing light in a wide vertical range and obtain three-dimensional perception.

The top view of the groove 6 is a rectangular opening. The groove-like structure and the setting of the tilt parameters should ensure that the light passing through the first longitudinal scattering screen 3 and the second longitudinal scattering screen 4 will not be blocked by the upper edge of the groove 6, and can be in mutual alignment. Imaging within the range of the corresponding viewpoint.

Looking at the center of the field of view of the groove 6 at any point of view, the complete view is stitched together by a series of vertical images, and each vertical image corresponds to the projectors in the projector array on the corresponding side. The projector array 1 projects the front multi-view images of the three-dimensional stereogram, and the projector array 2 projects the rear multi-view images of the three-dimensional stereogram, and the images of various perspectives are spliced at the center of the field of view. Assuming that the center of the field of view of the groove 6 is viewed within the scope of the field of view on the right side of the back-shaped desktop 5, what is seen at any point of view is projected by n projectors in the first projector array 1 on the left side of the back-shaped desktop 5 It is formed by splicing n vertical bar images. As shown in FIG. 6, S1~Sn in a complete view correspond to projectors P1~Pn respectively.

Claims (3)

1. multi-view desktop type three-dimensional display device, it is characterized in that comprising the first projector array (1), the second projector array (2), first vertical diffuser screen (3), second vertical diffuser screen (4), the L shaped desktop of intermediate openings (7), the L shaped desktop of intermediate openings (7) intermediate openings below and rear are provided with first vertical diffuser screen (3) and second vertical diffuser screen (4), first vertical diffuser screen (3) and second vertical diffuser screen (4) form right angle shape, the first projector array (1) is positioned over first vertical diffuser screen (3) below and projects to the top imaging of first vertical diffuser screen (3), and the second projector array (2) is positioned over second vertical diffuser screen (4) rear and projects to second vertical diffuser screen (4) the place ahead imaging.

2. a kind of multi-view desktop type three-dimensional display device according to claim 1 is characterized in that described the first projector array (1) and the second projector array (2) are the arrays that a plurality of projectors form, or is comprised of two dimensional display and lens array.

3. a kind of multi-view desktop type three-dimensional display device according to claim 2 is characterized in that described two dimensional display is LCD, LCOS, PDP, LED, CRT, OLED or projector.

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