CN202135266U - Full-angle naked-view space imaging system based on four DLP projections - Google Patents

Abstract

The utility model relates to a full angle naked eye space imaging system based on four DLP projections, comprising a frame, projection screens, DLP projectors and a computer, wherein two projection screens form a double-faced projection imaging carrier vertically arranged on a rotary table, a strong magnet is arranged on the rotary table, a Hall device is fixed near an operation track of the strong magnet, the four DLP projectors are uniformly fixed along the periphery of the frame, distances between each DLP projector and the center of the double-faced projection imaging carrier are same, the Hall device is directly connected with the computer, and the four DLP projectors are connected with the computer via a video shunt. The system is easy to realize, reliable in operation and high in instantaneity and stability.

Description

Full-angle naked-view space imaging system based on four DLP projections

technical field

The utility model relates to a full-angle naked-view space imaging system based on four DLP (Digital Light Projector, digital light projector) projections, belonging to the technical field of three-dimensional image display. the

Background technique

The objective world is a three-dimensional space with three dimensions. Since the birth of display devices, in order to truly reproduce the objective world, people have never stopped researching on stereoscopic display technology. The so-called three-dimensional display refers to the ability to display the image depth (third dimension) effect, just like we see the real world, it is three-dimensional. Stereoscopic display technology can be divided into naked-eye stereoscopic display technology and non-naked-eye stereoscopic display technology according to whether to add stereoscopic glasses. the

The current naked-view stereoscopic display technology mainly includes three types: holographic three-dimensional display, autostereoscopic display and volumetric display technology. Holographic three-dimensional display tries to reconstruct the light wave of the object that the eyes can get, so that the realistic image of the object can be seen even if the object is not in the original place. The biggest problem at present is that the reproduction of three-dimensional light field information is relatively complicated, which is not convenient for large-scale application . Autostereoscopic display uses materials such as cylindrical lenses and microlenses to decompose the original three-dimensional image into multiple interrelated two-dimensional images (or multiple images), and form stereoscopic vision through binocular parallax. The defect of this method is the contradiction between the viewing area and the resolution. The larger the resolution, the wider the viewing area. However, the resolution cannot be greatly improved at present, which limits the expansion of the viewing area and causes eye discomfort during observation. . For multiple film sources, it will inevitably bring about the complexity of the system structure, and it is difficult to achieve vertical parallax. The third is the volumetric display technology, which excites the medium in the display body in an appropriate way to generate visible light radiation to form volume pixels, and these volume pixels scattered in three-dimensional space constitute a stereoscopic image. Volumetric 3D display images exist in the real 3D space, showing a 3D picture closest to the real object, in line with people's real feelings of observing the world scene, satisfying all physiological and psychological depth hints, and allowing multiple people, multiple angles, and naked eyes to watch the scene at the same time , without any auxiliary glasses, compared with the other two naked-view stereoscopic display technologies, it is closer to the goal of the ultimate display. the

Although volumetric display technology can be used to model and reproduce three-dimensional objects, most of the three-dimensional scenes are still presented in the form of two-dimensional scanning display, which can effectively reduce the difficulty of reconstructing three-dimensional objects. In China, East China Normal University, Zhejiang University and other units have done a lot of research work on volume 3D scanning display, and developed a rotating volume scanning 3D display based on LED (Light Emitting Diode, light emitting diode) array. Although the above-mentioned solutions all realize volumetric three-dimensional display, the true three-dimensional display system based on the two-dimensional LED rotating screen uses LED array as the display unit, and its physical resolution is affected by the size of the LED. Currently, the maximum resolution is only 128×64; The LED array, control circuit, power supply and other components are heavy and cannot meet the conditions of high-speed rotation in large-volume applications. Due to the single-display array method, the screen flickers when rotating at low speed; the LED module has a large thickness, forming a bulk space Visual blind spots cause disadvantages such as difficulty in commercial popularization. the

Contents of the invention

In view of the problems and deficiencies in the prior art described above, the purpose of this utility model is to provide a full-angle naked-view spatial imaging system based on four DLP projections. The system is equipped with four projection modules to realize passive imaging components, improve the resolution of the display space, increase the volume of the display space, reduce the motor speed and motor noise by half, eliminate visual blind spots, and prolong the life of the system. the

The utility model adopts the following technical solutions to realize:

A full-angle naked-view spatial imaging system based on four DLPs (Digital Light Projector, digital light projection), comprising a frame, a projection screen, a DLP projector and a computer, characterized in that:

a. The two projection screens are mounted back-to-back on a metal sheet to form a double-sided projection imaging carrier, the double-sided imaging carrier is vertically and fixedly installed on a turntable, and is located on the rotation centerline of the turntable;

b. A strong magnet is fixedly installed on the edge of the turntable, and a Hall device is fixedly installed on the frame, so that the Hall device is close to the running track of the strong magnet;

c. Four DLP projectors are uniformly distributed and fixedly installed on the frame, so that the centers of the four DLP projectors and the double-sided projection imaging carrier are on the same horizontal plane, and the distance from the center is equal;

d. The Hall device is directly connected to the computer, and the four DLP projectors are connected to the computer through a video splitter.

Both of the above two projection screens are front-projection soft screens with a gain of about 0.9 times and an effective scattering angle of view greater than 160 degrees. The double screens are installed back to back on a metal sheet, and the area is greater than 30cm×24cm;

A motor is connected to the turntable and drives the turntable to rotate at a high speed of 8 to 10 revolutions per second.

The resolution of the above-mentioned DLP projector is greater than 320×240, the projection brightness is greater than 6LUX, and the contrast ratio is greater than 400:1;

The video splitter is composed of CycloneII2C35 processor, USB (Universal Serial Bus, universal serial bus) interface chip ISP1362, VGA (Video Graphics Array, display drawing array) interface chip ADV7123 and power management modules. The video splitter communicates, the video splitter decomposes the image and transmits the image to four DLP projectors through the VGA video transmission interface, the computer sends a synchronous display signal to the video splitter according to the signal of the Hall device, and the video splitter is in Immediately after receiving the synchronous signal, the stereoscopic image is transmitted synchronously to four DLP projectors in parallel;

30cm

30 cm

24cm的显示体空间、大于320×240×360的空间显示分辨率和水平360度垂直接近360度的裸视全角成像，有利于商业应用，为展示领域提供了新的媒体途径。 The utility model adopts the method of rotating passive parts, compared with the active display device following the rotation, the weight of the rotating unit is reduced, the active module is not affected by the rotating stress, the system is safe and reliable, and can obtain more than

30cm

30cm

The display space of 24cm, the spatial display resolution greater than 320×240×360, and the naked-view full-angle imaging of 360 degrees horizontally and 360 degrees vertically are beneficial to commercial applications and provide a new media channel for the display field.

The utility model has the advantages of easy realization, reliable operation, high real-time performance and high stability. the

Description of drawings

Figure 1 Schematic diagram of the structure of a full-angle naked-view space imaging system based on four DLP projections

Figure 2 is a block diagram of the video splitter based on CycloneII2C35.

Detailed ways

A preferred embodiment of the present utility model is described in detail in conjunction with the accompanying drawings as follows: Referring to Fig. 1, this full-angle naked-view space imaging system based on four DLP projections includes a frame (12), a projection screen (2), a DLP projector ( 4) and a computer (8), two projection screens (2) are mounted back to back on a metal sheet (1) to form a double-sided projection imaging carrier, and the double-sided imaging carrier is fixed vertically on a turntable (5 ), and located on the rotation center line of the turntable (7); a strong magnet (10) is fixedly installed on the edge of the turntable (5), and a Hall device (9) is fixedly installed on the frame (12) , so that the Hall device (9) is close to the running track of the strong magnet; the frame (12) is fixedly installed with four DLP projectors (4) in the circumferential direction, so that the four DLP projectors (4) and the dual The center of the surface projection imaging carrier is on the same horizontal plane, and the distance from the center is equal; the Hall device (9) is directly connected to the computer (8), and the four DLP projectors (4) pass a video A splitter (6) connects the computer (8). The projection screen (2) adopts a front-projection soft screen with a gain of 0.9 times and an effective scattering viewing angle greater than 160 degrees. A motor (3) is connected to drive the turntable (5) to rotate at a high speed of 8 to 10 circles per second. Each DLP projector (4) is connected to a video splitter (6) through a VGA (display graphics array) video transmission interface, and the video splitter (6) is connected to a computer (8) through a USB (universal serial bus) interface . See Figure 2, the video splitter (6) is composed of CycloneII2C35 processor, USB interface chip ISP1362, VGA interface chip ADV7123 and power management modules. The computer (8) sends a synchronous display signal to the video splitter (6) according to the signal of the Hall device (9), and the video splitter (6) immediately transmits the synchronous display signal to the four DLP projectors (4) in parallel after receiving the synchronous signal. ) to transfer the subject image synchronously. the

Claims (3)

1. the naked visual space of the full-shape imaging system based on four DLP (Digital Light Projector, digital light projection) comprises frame (12), projection screen (2), DLP projector (4) and computer (8), it is characterized in that:

A. two said projection screens (2) are mounted on a sheet metal (1) back-to-back and go up formation biplane projection imaging support, and this double-face imaging carrier vertically is fixedly mounted on the turntable (5), and is positioned on the rotation centerline of turntable (7);

B. a fixed installation strong magnet (10) on said turntable (5) edge is gone up a fixed installation hall device (9) in said frame (12), makes hall device (9) near the strong magnet running orbit;

C. circumferentially be uniformly distributed with fixed installation four said DLP projectors (4) on the said frame (12), the center that makes four (4) d. of DLP projector and said biplane projection imaging support and equates with this centre distance on same horizontal plane;

Said hall device (9) directly connects said computer (8), and said four DLP projectors (4) connect said computer (8) through a video splitter (6).

2. the naked visual space of the full-shape based on four DLP projections according to claim 1 imaging system is characterized in that said projection screen (2) adopts that gain is 0.9 times, effectively the scattering visual angle is greater than the soft curtain of the just throwing of 160 degree.

3. the naked visual space of the full-shape based on four DLP projections according to claim 1 imaging system is characterized in that connecting driving turntable (5) with per second 8 to 10 circle high speed rotating by a motor (3).

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