Parallel drawing image display curved large screen projector splicing device

Abstract

The invention discloses a device for splicing projectors for displaying curved large-screen images in parallel, and the problem to be solved is to make the large screen spliced ​​by projectors into a curved surface with low cost, convenient correction and high stability. The device comprises a plurality of horizontal displacement rods, a plurality of vertical displacement rods, a plurality of cross displacement racks, a plurality of projector brackets, a plurality of projector boxes and a plurality of projectors, wherein the cross displacement rack is fixedly assembled by two hollow rods in a cross shape, the horizontal displacement rod and the vertical displacement rod respectively pass through the horizontal and vertical hollow rods of the cross displacement rack, the projector bracket is fixedly connected to the cross displacement rack, the projector is placed in the projector box, and the projector bracket and the projector box are connected in series up and down through a grooved rotating rod connected in an integral manner up and down. The rotating rod is adjusted to change the projection angle of the projector connected to the same rotating rod, and a large curved screen is projected in combination with a curved projection screen. The production cost is low, the correction is stable, and the projection wall has strong flexibility in movement.

Description

Technical Field

[0001] The present invention relates to the technical field of display devices, in particular to the technical field of large-screen projector splicing display devices used for computer parallel drawing. Background Art

[0002] With the development of parallel rendering technology and the improvement of computer 3D scene rendering performance, the backwardness of 2D display technology has become more obvious. Although computer hardware has developed rapidly, the technical indicators of various display terminals, such as computer monitors, have been progressing slowly. The backward development of display technology has seriously affected the progress of computers brought about by other hardware improvements. How to display high-resolution, multi-pipeline input video content is a problem that needs to be solved.

[0003] Computer parallel rendering of images is a typical example of such problems. A more common solution is to splice multiple projector arrays to display ultra-high-resolution images in real time, where each projector is responsible for displaying its own corresponding computer graphics pipeline. For example, Minnesota's power Wall, Princeton's Scalable Display Wall, UNC's PixelFlex, and the projection wall Display-wall-in-a-Box jointly established by NCSA and UIUC. In addition, ViswallTM is a commercial product produced by Visbox in the United States. The projection wall can be composed of 9 to 96 projectors, providing display resolutions from 3072*2304 to 12288x6144. This solution has two outstanding advantages: the first is high resolution, which makes it more realistic and more details can be displayed in the fields of large-scale parallel rendering visualization and virtual reality; the second is the ultra-large display screen, which allows more people to watch at the same time, improving viewing and communication efficiency.

[0004] The biggest problem faced by this type of parallel drawing projector splicing system is that the images spliced ​​together by multiple projectors have obvious gaps, that is, all projectors need to be calibrated to reduce or eliminate the gaps. At present, the general solution is to use physical brackets to manually adjust the position and angle of the projectors so that multiple projectors can be correctly spliced ​​together. The problems with this type of device are: 1. The price of instruments such as physical brackets is too high; 2. The calibration work is very cumbersome; 3. The stability of the physical bracket is poor; 4. The flexibility of the projection wall is poor.

[0005] In addition, the most important point is that the current large screens spliced ​​by projectors are mostly flat, and there is no mature parallel drawing image display curved large screen projector splicing device. Curved large screens are more satisfying to people's viewing experience and are a major development direction of displays, so it is necessary to conduct research and design. Summary of the invention

[0006] The problem to be solved by the device for splicing projectors of large-screen projectors with parallel drawing and displaying curved surfaces is to make the large screen spliced ​​by the projectors into a curved surface with low cost, convenient correction and high stability.

[0007] A device for splicing projectors for displaying curved large-screen images in parallel drawing comprises a plurality of horizontal displacement rods, a plurality of vertical displacement rods, a plurality of cross displacement racks, a plurality of projector brackets, a plurality of projector boxes and a plurality of projectors. The cross displacement rack is formed by two hollow rods fixedly assembled in a cross shape. The horizontal displacement rod and the vertical displacement rod respectively penetrate through the horizontal and vertical hollow rods of the cross displacement rack. The projector bracket is fixedly connected to the cross displacement rack. The projector is placed in the projector box. The projector bracket and the projector box are connected in series up and down through a grooved rotating rod which is connected as an integral part up and down.

[0008] Preferably, the two hollow rods of the cross displacement frame are fixed by welding, and the length of the hollow rods is between 15-35 mm.

[0009] Preferably, the projector bracket is placed horizontally and is connected to the cross displacement bracket by welding or bolts.

[0010] Preferably, the projector is fixed in the projector box by bolts.

[0011] Preferably, the number of projector brackets is equal to the number of cross displacement brackets, and is equal to the product of the number of horizontal displacement rods and vertical displacement rods.

[0012] Preferably, the length of the horizontal displacement rod is 1.3-3 times that of the vertical displacement rod.

[0013] Preferably, the top ends of the vertical displacement rods are connected together through a hanging member, and the hanging member includes a horizontal axis connecting the vertical displacement rods in series and a U-shaped groove for fixing the lateral position of the vertical displacement rods.

[0014] Preferably, the vertical displacement rod located in the middle of the device has a plurality of jacks with equal spacing and is equipped with latches, and the number of the latches is equal to that of the horizontal displacement rod.

[0015] Preferably, the projector box has a through hole that is nested with the groove of the rotating rod, and the projector bracket has a cylindrical through hole with a diameter larger than that of the rotating rod.

[0016] By moving the horizontal displacement rod and the vertical displacement rod, the placement displacement of the projector can be changed, and the projection position of the projector can be changed. By adjusting the rotating rod, the projection angle of the projector connected to the same rotating rod can be changed. With the curved projection screen, a large curved screen with curvature in the horizontal direction can be projected. The calibration work is simple and effective. The horizontal displacement rod and the vertical displacement rod cross to form a whole, which ensures the stability of the calibration and the flexibility of the projection wall. In addition, the overall structure of the device is simple, involving few parts, and all of them can be made of ordinary high-strength plastics, with low production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The invention is a schematic diagram of the overall structure of a parallel drawing image display curved surface large screen projector splicing device.

[0018] Figure 2 The utility model is a schematic diagram of the structure of the rotating rod part of the splicing device of the large-screen projector for parallel drawing image display curved surface.

[0019] Figure 3 The present invention is a schematic diagram of the structure of the suspension parts of a parallel drawing image display curved surface large screen projector splicing device.

[0020] Figure 4 The invention is a schematic diagram of the structure of the jack and latch parts of a parallel drawing image display curved surface large screen projector splicing device.

[0021] In the figure: 1. horizontal displacement rod, 2. vertical displacement rod, 3. cross displacement frame, 4. projector bracket, 5. projector box, 6. projector, 7. rotating rod, 8. hanging part, 9. horizontal axis, 10. U-shaped groove, 11. socket, 12. latch. DETAILED DESCRIPTION

[0022] like Figure 1 , 2 As shown, a parallel drawing image display curved large-screen projector splicing device includes a plurality of horizontal displacement rods, a plurality of vertical displacement rods, a plurality of cross displacement frames, a plurality of projector brackets, a plurality of projector boxes and a plurality of projectors. The cross displacement frame is formed by two hollow rods fixedly assembled in a cross shape. The horizontal displacement rod and the vertical displacement rod respectively pass through the horizontal and vertical hollow rods of the cross displacement frame. The projector bracket is fixedly connected to the cross displacement frame. The projector is placed in the projector box. The projector bracket and the projector box are connected in series up and down through a grooved rotating rod that is connected up and down as an integral whole.

[0023] The two hollow rods of the cross displacement frame are fixed by welding, and the length of the hollow rods is between 15-35mm. This is because the projector bracket and the projector have a certain weight. This assembly structure makes the cross displacement frame bear a large lateral force. The two hollow rods are fixed by welding to maintain the stability and reliability of the connection between the two hollow rods. The large length of the hollow rod ensures that the deformation of the vertical displacement rod is small under the condition of large lateral force.

[0024] The projector bracket is placed horizontally and connected to the cross displacement bracket by welding or bolts. The connection between the projector bracket and the cross displacement bracket is stable and reliable to avoid large deformation.

[0025] The projector is fixed in the projector box by bolts, which prevents the projector from shaking in the projector box when the projector bracket is moved.

[0026] The number of projector brackets is equal to the number of cross-displacement brackets, and is equal to the product of the number of horizontal displacement rods and vertical displacement rods. This is because there is a cross-displacement bracket at the intersection of the horizontal displacement rod and the vertical displacement rod, and each needs to be equipped with a projector.

[0027] The length of the horizontal displacement rod is 1.3-3 times that of the vertical displacement rod. The primary purpose is to limit the length of the vertical displacement rod. Two considerations are as follows: 1. Most projectors can adjust the projection position in the vertical direction, so the length of the vertical displacement rod can be shorter. The minimum value of 1.3 is based on the fact that the horizontal and vertical pixel ratios of general projectors are 4:3; 2. If the length of the vertical displacement rod is too long, it will block the viewer's line of sight. Secondly, most projectors do not have the function of adjusting the projection position in the horizontal direction, so the length of the horizontal displacement rod needs to be large enough so that the horizontal distance between two adjacent projectors and their corresponding projection center distances are basically equal. At the same time, a larger length of the horizontal displacement rod generally does not affect the viewing line of sight.

[0028] like Figure 3 As shown, the top ends of the vertical displacement rods are connected together through a suspension member, and the suspension member contains a horizontal axis connecting the vertical displacement rods in series and a U-shaped groove that fixes the horizontal position of the vertical displacement rods. The functions of the suspension member are: 1. Fixing the relative positions of the components of the device to stabilize the working position of the projector; 2. Hanging the entire device on the ceiling. The function of the horizontal axis is to allow the vertical displacement rods to move longitudinally in the suspension member; the function of the U-shaped groove is to prevent the single pendulum motion of the vertical displacement rods.

[0029] like Figure 4 As shown, the vertical displacement rod located in the middle of the device has a number of equally spaced holes and is equipped with latches, the number of which is equal to that of the horizontal displacement rods. The purpose is to fix the position of each horizontal displacement rod to prevent it from sliding downward.

[0030] The projector box has a through hole that is nested with the groove of the rotating rod, and the projector bracket has a cylindrical through hole with a diameter larger than the rotating rod. This structure allows the projector box to rotate with the rotating rod when the rotating rod is rotated, while the projector bracket remains in a fixed position.

Claims

1. A device for splicing projectors for displaying curved large screens in parallel drawing images, characterized in that it comprises a plurality of horizontal displacement rods, a plurality of vertical displacement rods, a plurality of cross displacement racks, a plurality of projector brackets, a plurality of projector boxes and a plurality of projectors, wherein the cross displacement rack is formed by two hollow rods fixedly assembled in a cross shape, the horizontal displacement rod and the vertical displacement rod respectively pass through the horizontal and vertical hollow rods of the cross displacement rack, the projector bracket is fixedly connected to the cross displacement rack, the projector is placed in the projector box, and the projector bracket and the projector box are connected in series up and down through a grooved rotating rod connected in an integral manner up and down, The number of the cross displacement rack, the projector bracket, the projector box, and the projector is equal, and is equal to the product of the number of the horizontal displacement rod and the vertical displacement rod. The top ends of the vertical displacement rods are connected together through a suspension member, and the suspension member has a horizontal axis connecting the vertical displacement rods in series and a U-shaped groove for fixing the horizontal position of the vertical displacement rods. The vertical displacement rod located in the middle of the device has several equally spaced sockets and is equipped with bolts. The number of bolts is equal to that of the horizontal displacement rod. The projector box is provided with a through hole which is nested with the groove of the rotating rod, and the projector bracket is provided with a cylindrical through hole which has a diameter larger than that of the rotating rod.

2. According to the parallel drawing image display curved surface large screen projector splicing device described in claim 1, it is characterized in that the two hollow rods of the cross displacement frame are fixed by welding, and the length of the hollow rods is between 15-35mm.

3. According to the parallel drawing image display curved large screen projector splicing device described in claim 1, it is characterized in that the projector bracket is placed horizontally and is fixedly connected to the cross displacement frame by welding or bolts.

4. According to the parallel drawing image display curved surface large screen projector splicing device described in claim 1, its characteristic is that the projector is fixed in the projector box by bolts.

5. According to the parallel drawing image display curved surface large screen projector splicing device described in claim 1, it is characterized in that the length of the horizontal displacement rod is 1.3-3 times that of the vertical displacement rod.

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