CN102117578B - Sunk arc virtual reality display wall - Google Patents

Abstract

A sunk arc virtual reality display wall relates to the technical field of virtual reality display and comprises a flat-panel display, an arc image amplifying and guiding screen and a splicing frame, wherein an image of the flat-panel display is displaced to an arc image guiding screen by using the arc image amplifying and guiding screen and an arc image is displayed on the arc image guiding screen; after the curvature of the arc virtual reality display wall is determined, the curvature of a cambered surface of a display surface of the arc image amplifying and guiding screen is same with that of an arc simulation display wall; arc splicing units with completely same size and cambered surface curvature are formed by the flat-panel display and the arc image amplifying and guiding screen; and the arc splicing units with completely same size and shape are spliced to from the arc virtual reality display wall through a splicing framework. The sunk arc virtual reality display wall has the advantage that the three-dimensional effect of the vision can be realized.

Description

A sunken curved virtual reality display wall

technical field

The invention belongs to the technical field of virtual reality display, and in particular provides a submerged arc-shaped virtual reality display wall, which has a very wide range of applications in places such as combat command, simulation, game display, TV station, exhibition, and large-scale public demonstration. .

Background technique

Objects in three-dimensional space can know the existence and shape of the object when the reflected light enters the surface of the retina of the human eye. The basic skills of the human retina are similar to the principle of photography. On our retina, there are densely distributed up, down, left, and right two-dimensional optic nerve cells and can know the position of the observed object. However, the retina alone is not enough to know the perception of depth (or stereo) when viewing an object. From the point of view of physiology and psychology, the source of the depth (or stereo) perception of human eyes has the following factors.

1. Physiological factors

1. Binocular parallax: the distance between the two eyes of human eyes: average 65mm (pupil distance), the maximum angular resolution: about 0.5″ (ie 1/120°), the maximum signal transmission rate: the transmission rate of both eyes is 4.3× 106bits/s, the transmission rate of a single nerve is 5bits/s. The imaging difference obtained by different positions of the two eyes can perceive and judge the depth of the observed object.

2. Light angle: the crossing angle between the eyes of the two eyes and the object. The distance between the observer and the object is different, and the crossing angle of the eyes of the two eyes also changes accordingly. If the excitations are closer to each other, the intersection angle (light angle) will be large, and on the contrary, the intersection angle will become smaller if the distance is far away. According to the distance of the observed object, the angle of the eyeballs of the two eyes has to be adjusted accordingly, so that the distance between the object and the depth can be felt. Therefore, at a short distance, the change in the viewing angle contributes a lot to the depth, but the distance exceeds 1000mm, and the eyes cannot perceive the depth of the object due to the small change in the viewing angle.

3. Adjustment: The crystalline lens in the structure of the human eye is equivalent to the focusing lens of the camera, which can bulge up and project the image on the surface of the retina. According to the adjustment of the bulging degree of the crystal, the depth of the object can also be felt. Generally, when the object distance exceeds 2000mm, it will be difficult to perceive the depth of the object.

Displays currently on the market are all flat displays, and the best viewing angle for human eyes is a curved surface, and flat displays are not the most suitable display shape for human eyes to watch. The curved display will restore the picture to a picture with a sense of distance, so that people can naturally produce three-dimensional images without glasses.

2. Psychological factors

1. When the observer and the object move, the parallax caused by the movement of the near view and the distant view is called monocular motion parallax, and the monocular motion parallax can also provide the observer with a sense of the depth of the object.

2. By means of the difference in the size of the image on the retina, even the same object can distinguish the distance.

3. The depth and three-dimensional feeling can also be combined from the arrangement and configuration of the three-dimensional space of the object.

4. When looking at the parallel lines in the distance, you can also feel the depth of the distance through your eyes.

5. Even if you look at evenly arranged objects in the distance, such as terraced fields or surface slopes, you can get a sense of depth through different densities.

6. When looking at a distant object with the same contrast, the distance and depth of the object can also be judged from the change in contrast reduction.

7. From the shadow changes produced by the object according to the light, you can feel the shape of the three-dimensional space.

Present displays are all flat panel displays or slightly convex CRT picture tube displays, and the three-dimensionality of the eyes' perception of images from common display images is all to perceive the stereoscopic images by psychological factors. Perceive stereoscopic images from the perspective of physiology. At present, the method of inventor Whist and Prestan's stereoscopic glasses is adopted on planar images, including polarization differentiation, time division, wavelength division, and space division. The method of viewing stereoscopic images without glasses on a plane image is the principle of the parallax barrier method (Parallax Barrier) proposed by the American inventor F.E.Ives. Seeing stereoscopic images on a plane image is achieved by using the parallax of the two eyes. From these two methods, many methods for realizing stereoscopic display have been derived. The habit of the brain and optic nerves in processing the image signals they see makes people prone to dizziness, eye fatigue and dry eyes.

With the rapid development of 3D video source technology, 3D display technology has become a bottleneck restricting the development of 3D technology. The disadvantages of watching 3D film sources with glasses have long been recognized by people. Although it has developed rapidly in the past, large-size, high-brightness, and high-resolution technologies still restrict the development of parallax barrier technology. Although the parallax barrier technology was invented in 1903, the real commercial use and promotion is near. It started only 10 years ago, and the products developed are far from the three-dimensional effect that can be achieved by wearing glasses. There is still a long way to go before a large number of commercialization and entry into the home.

Virtual reality can be widely used in aircraft simulation, ship simulation, homeland security, training simulation, medical simulation and entertainment and other places. Simulation can simulate and display an object or process. Simulation can save a lot of actual combat costs and has huge Economic benefits, such as simulated driving of aircraft, simulated driving of cars, simulated driving of tanks, simulated driving of submarines, simulated simulation of missile TV guidance, simulated game consoles, simulated stage background, etc. Among them, the main restriction on the development of simulation is the display system. The perfect resolution of the software design display and the inability to truly reproduce the real images in actual combat observed from the human perspective, thus affecting the actual effect of simulation training. The simulation display systems currently used in the market are mainly the front projection display systems of Barco Belgium, Christie USA, and DP UK. They generally adopt seamless edge fusion splicing technology. The price of edge fusion splicing display systems is very expensive, and the use cost and The maintenance cost is also very high. The price of a set is basically around 30 million yuan, and the use cost plus maintenance cost reaches 20,000 yuan per hour. Unless it is used in particularly important simulations, the actual promotion and application will be affected by the high price. , and the front projection does not meet the requirements of actual simulation, which affects the effect of simulation. The development of a low-cost simulation display system and the use of rear projection or flat panel display is a problem that must be faced in order to obtain a wide range of applications for simulation. British SIMLESS company The seamless splicing display system using 20-inch LCD TV splicing displayed in October 2004, as shown in photo 1, can be widely used in simulated driving and game console systems. A convex lens is added to the non-image area of the patchwork to enlarge and display the edge image to the non-image area. Although there is a defect that the image at the image seam is magnified and deformed, it solves the problem of continuity and arc of the image between the units, making the simulation The image is closer to reality. The display system of British SIMLESS company is composed of three 20-inch LCD TVs, but this product has pointed out the direction for our company's product research and development since 2005.

Contents of the invention

The purpose of the present invention is to provide a submerged curved virtual reality display wall, which can be used without glasses and can make people feel strongly integrated into the picture, and can be widely used in large-scale virtual reality, theaters and other places.

The principle is based on human binocular parallax, light angle, and eyeball adjustment. Human eyes have the strongest sense of depth within 10 meters, especially within 2 meters. If it exceeds 10 meters, the eyes can no longer perceive it due to the small change in viewing angle. The basic function of the human eye is the depth of the object. The present invention adopts the method of field of view restoration, uses the curved surface to display images, and restores the plane image to the image viewed by the camera and human eyes without changing the viewing habits of the human eyes, and makes the picture naturally formed through the depth of the curved surface There is a sense of front and rear distance and a certain depth of the picture, and the arc-shaped intrusive display makes people have the feeling of melting into the image, so that it can overcome the discomfort caused by changing people's viewing habits by using binocular parallax, and eliminate people. Dizziness, eye fatigue and dry eyes caused by watching stereoscopic images for a long time.

The present invention includes three parts: a flat panel display, an arc-shaped image-magnifying image-guiding screen and a splicing frame; The accuracy should be less than 0.5mm, and the splicing frame is installed behind the flat panel display. The image of the flat panel display is displaced onto the arc-shaped image-guiding screen by using the arc-shaped image magnification image-guiding screen, and the arc-shaped image is displayed on the arc-shaped image-guiding screen. After the curvature of the curved virtual reality display wall (the radius of curvature is 1.3 to 25 meters) is determined, the curvature of the curved surface of the display surface of the curved image magnification screen is equal to the curvature of the curved simulation display wall. The image magnification screen consists of arc-shaped splicing units with the same size and curvature, and the arc-shaped splicing units with the same size and shape are spliced into a curved virtual reality display wall through the splicing frame.

The area of the curved cross-section of the arc-shaped image magnifying screen of the present invention is larger than (the area frame is greater than 0.5-2.0mm) the contact surface with the flat panel display, and is the same as the area of the flat panel display framed. The area of the contact surface between the curved image magnifying screen and the flat panel display is equal to the display area of the flat panel display, and the reinforced frame around the curved image magnifying screen is installed 1mm to 3mm behind the display surface of the image guiding screen, so that the display unit Seamless splicing can be achieved during splicing. Moreover, the geometric size of the frame is smaller than (0.3-0.8mm) the maximum geometric size of the curved image magnifying screen, and the curved image magnifying screen is composed of an arc-shaped optical fiber magnifying screen 1, a frame 2, a countersunk screw 3 and a steel belt or The aluminum strip is composed of 4, as shown in Figures 1, 2, and 3. When multi-screen splicing, the area of the entire curved splicing display surface should be greater than (area border greater than 0.5-2.0mm) or equal to the area of the flat panel display plus the area of the flat panel display frame, and the length and width around the arc display surface should be greater than (0.5mm) -1.0mm) or equal to the length and width of the flat-panel display plus the width of the flat-panel display frame; when multi-screen single-layer splicing, the width or length of the curved display surface in the splicing direction is greater than or equal to the display width or length of the flat-panel display in the splicing direction plus the flat-panel display The border width of no image in the tiling direction.

The curvature of the splicing wall arc is determined according to the field of view of the human eye and the viewing distance. The larger the viewing distance, the larger the diameter of the arc, and the smaller the viewing distance, the smaller the diameter of the arc. For a curved image guide screen installed on a flat-panel display of the same size or other types of displays, the larger the radius of the arc, the more suitable for long-distance viewing; the smaller the radius of the arc, the more suitable for close-up viewing. The smaller the arc diameter of the curved image guide screen installed on the flat panel display or other types of displays of the same size, the greater the distance between the image edge of the curved image guide screen and the image center, the stronger the sense of integration and the more obvious the three-dimensional effect . The larger the size of the display, the larger the size of the matching curved image guide screen. Even if the curvature of the curved display surface is determined, the larger the size of the curved image guide screen, the larger the size of the curved display surface. The greater the depth of the center of the image and the edge of the image, the stronger the sense of melting, and the greater the three-dimensional effect of the obtained image.

The flat panel display of the present invention is a liquid crystal display, and may also be other types of flat panel displays.

The curved display splicing unit is composed of a flat-panel display and a curved image-guiding screen. The light-incoming plane of the curved image-guiding display and the display surface of the flat-panel display must be closely installed. The installation gap accuracy between the two planes Should be less than 0.5mm, as shown in Figure 4, the flat panel display 5 is connected with the steel strip or aluminum strip 4 fixed on the frame of the arc-shaped image magnification image guide screen through the countersunk head screw 3 to form the display unit of the arc-shaped virtual reality splicing wall, A hanger 6 is mounted on the rear cover of the display unit of the curved virtual reality video wall, as shown in FIG. 5 . As shown in Figure 6, the hanger has a nut 8 integrated with the hanger that can be adjusted up and down by the adjusting bolt 7 to adjust the splicing unit of the arc display, and the hanger can hang the splicing unit of the arc on the splicing frame.

The splicing frame is to fix the splicing unit of the curved display on the splicing frame, and the splicing unit of the curved display is suspended on the splicing frame through the hanger behind the splicing unit of the curved display, as shown in FIG. 7 . Screw the adjusting bolt 7 into the nut 8 on the hanger behind the curved display splicing unit. By rotating the adjusting bolt 7, the height of the curved display splicing unit can be fine-tuned to avoid installation accuracy caused by the manufacturing error of the curved display splicing unit or splicing frame Insufficient splicing gap caused by enlargement. The splicing wall of the curved display unit is shown in Figure 8.

The advantage of the present invention is that it can realize the curved surface display of the picture, so that the image picture in the middle and both sides of the curved display surface has a distance and depth relative to people's eyes, so that people have the feeling of melting into the picture, and it can be done without glasses. Realize the three-dimensional sense of vision.

Description of drawings

Figure 1 is a curved image magnification guide screen. The size of the display screen of the flat panel display is A, the frame size of the flat panel display is B, and the size of the arc-shaped enlarged image of the fiber optic image guide screen is C. Note: A<B<=C

Fig. 2 is a portion of the fiber optic image guiding screen of the arc-shaped magnified image guiding screen. Arc-shaped fiber optic amplified image guide screen 1, frame 2

Fig. 3 is an enlarged schematic diagram of the edge connection of the arc-shaped enlarged image guide screen. Curved optical fiber amplified image guide screen 1, frame 2, countersunk screw 3, steel strip or aluminum strip 4

Fig. 4 is a schematic diagram of a close installation of a flat panel display and a curved image magnification guide screen. flat panel display 5

Fig. 5 is a curved display splicing unit for the hanger. hanger 6,

Figure 6 is a schematic diagram of the hanger. Adjusting bolt 7, nut 8

Fig. 7 is a schematic diagram of the jointing of the splicing frame and the hanger. Stitching frame 9

Fig. 8 is a schematic diagram of a curved mosaic display wall.

Detailed ways

1 to 8 are implementations of a specific embodiment of the present invention.

The present invention includes three parts: a flat-panel display, an arc-shaped image-magnifying image-guiding screen, and a splicing frame. The accuracy should be less than 0.5mm, and the splicing frame is installed 1mm to 3mm behind the display surface of the arc-shaped image magnification guide screen; The curved image is displayed on the image screen; after the curvature of the curved virtual reality display wall (the radius of curvature is 1.3 to 3.0 meters) is determined, the curvature of the curved surface of the display surface of the curved image magnification guide screen is equal to that of the curved simulation display wall Curvature, arc-shaped splicing units with the same size and arc surface curvature composed of flat-panel display and arc-shaped image magnification guide image magnification screen, arc-shaped splicing units with identical size and shape are spliced into arc-shaped virtual reality through the splicing frame display wall.

Claims (1)

1. A submerged curved virtual reality display wall is characterized in that it comprises three parts of a flat panel display, a curved image magnification image guide screen and a splicing frame, the plane of the arc image magnification image guide screen entering light and the plane of the flat panel display The display surface is tightly installed, and the installation gap accuracy between the two planes is less than 0.5mm. The reinforced frame around the curved image magnification image guide screen is installed 1mm to 3mm behind the display surface of the arc-shaped optical fiber magnification image guide screen, and the curved image is used to enlarge The image guide screen shifts the image of the flat-panel display to the arc-shaped image magnification guide screen, and the arc-shaped image is displayed on the arc-shaped image magnification guide screen; the curvature radius of the arc-shaped virtual reality display wall is 1.3 to 25 meters; The curvature of the curved surface of the display surface of the image magnification screen is equal to the curvature of the curved virtual reality display wall. The flat panel display and the image magnification screen are composed of a curved splicing unit with the same size and curvature of the arc surface. , The curved splicing units with exactly the same shape are spliced into a curved virtual reality display wall through the splicing frame; The area of the curved section of the arc-shaped image-enlarging image-guiding screen is greater than the area of the display surface of the flat-panel display in contact with the image-guiding screen, which is equal to the area of the frame of the flat-panel display; the arc-shaped image-enlarging image-guiding screen is in contact with the flat-panel display The surface area is equal to the display area of the flat panel display, so that the curved splicing unit can be seamlessly spliced when splicing; and the geometric size of the frame is 0.3-0.8mm smaller than the maximum geometric size of the curved image magnification guide screen. The image magnification image guide screen is composed of a curved optical fiber magnification image guide screen (1), a frame (2), a countersunk screw (3) and a steel strip or aluminum strip (4); The length is greater than or equal to the display length of the flat-panel display plus the width of the frame of the flat-panel display, and the width around the curved display surface is greater than or equal to the display width of the flat-panel display plus the width of the frame of the flat-panel display; The width or length is greater than or equal to the display width or length of the flat panel display in the splicing direction plus the border width of the flat panel display without images in the splicing direction; The arc-shaped splicing unit is composed of a flat-panel display and an arc-shaped image magnification guide screen, and the flat-panel display (5) is connected with the steel strip or aluminum strip (4) fixed on the frame of the arc-shaped image magnification image guide screen through countersunk screws (3) , forming the arc-shaped splicing unit of the arc-shaped virtual reality display wall, the back cover of the arc-shaped splicing unit of the arc-shaped virtual reality display wall is equipped with a hanger (6), and the arc splicing can be adjusted by adjusting the bolt (7) on the hanger The nut (8) integrated with the hanger for the unit to be adjusted up and down, and the hanger (6) hangs the arc-shaped splicing unit on the splicing frame (9); The splicing frame (9) is to fix the arc splicing unit on it, screw the adjusting bolt (7) into the nut (8) on the hanger after the arc splicing unit, and fine-tune the arc by rotating the adjusting bolt (7). The height of the arc-shaped splicing unit can avoid the increase of the splicing gap caused by the insufficient installation accuracy caused by the manufacturing error of the arc-shaped splicing unit or the splicing frame.

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