A fan display

Abstract

The application discloses a fan display screen, which comprises a control mechanism and a fan blade, wherein the control mechanism comprises a control board and a driving motor, the driving end of the driving motor is connected with the fan blade, and the fan blade is an arc-shaped rod piece; the number of the fan blades is one group or multiple groups, which are driven to rotate by the driving motor and rotate in a spherical surface; one side of the fan blade, which faces the audience, is provided with lamp beads, the lamp beads are electrically connected with the control board, the processing module in the control board analyzes a video into image pixel coordinate values, color values, gray scale values and other numerical values, and transmits the numerical values to the lamp beads at the corresponding positions of the fan blades; the lamp beads are lighted according to the corresponding numerical values, combined with the rotation of the fan blades, and the display of a picture is realized. The display screen can still present a certain three-dimensional effect when displaying and playing various conventional image videos, can play 3D, VR and other image videos, can significantly improve the picture depth of field and the field of view, and can bring higher immersion and stereoscopic feeling to the audience; the whole device is reasonable in structure, convenient to operate and convenient to popularize and use.

Description

Technical Field

[0001] This invention relates to the field of display screen technology, and more specifically to a fan-operated display screen. Background Technology

[0002] Fan-type displays utilize the principle that the visual effect of light on the retina persists for a short time after the light stops. During operation, LEDs on the fan blades emit light corresponding to the input image or video. As the fan rotates, the light received by the human eye remains within the range of visual memory, forming an image. Traditional fan-type displays use a perforated image, with the display placed at a certain height above the ground. The perforated image appears suspended in the air, giving the impression of an aerial image. However, this method has the following drawbacks:

[0003] Poor 3D effect: Existing fan-mounted displays rely solely on perforated images to create a floating effect, giving people a sense of 3D, but the 3D effect is still not obvious and lacks depth of field.

[0004] The playback targets are relatively limited; a certain stereoscopic effect can only be produced when playing special 3D videos with cutouts (the image only contains people or objects, without scenes or backgrounds, or the scenes and backgrounds are black). Cutout videos are rarely seen or used in daily life; although existing 3D rotating fan machines can also play regular images and videos without cutouts, the playback image does not have a stereoscopic effect, thus losing its inherent value.

[0005] Its application scenarios are relatively limited; its application scope is extremely narrow, with only a small number of applications used in stage decoration or advertising display. It is difficult to apply it to fields such as home, office, and VR, making it difficult to popularize its application.

[0006] The aforementioned shortcomings are mainly caused by its own structure and the corresponding display and playback method. To overcome these shortcomings, improvements need to be made to its structure and display and playback method. Summary of the Invention

[0007] The purpose of this invention is to provide a simple and reasonably designed arc-shaped fan display screen to solve the above-mentioned problems.

[0008] The present invention achieves the above objectives through the following technical solutions:

[0009] A fan-shaped display screen includes a control mechanism and fan blades. The control mechanism includes a control board and a drive motor. The drive end of the drive motor is connected to the fan blades. The fan blades are arc-shaped rods and rotate to form a spherical structure. LED beads are arranged on the outer surface of the fan blades for display. The LED beads are electrically connected to the control board.

[0010] A further improvement is that the fan blades are in one or more groups, and when there are multiple groups of fan blades, the fan blades are arranged in a cross pattern with equal included angles.

[0011] A further improvement is that the arc structure of the fan blade is a conventional arc rod or a Fresnel arc rod; wherein, the conventional arc rod includes a concave arc rod or a convex arc rod, and the Fresnel arc rod includes a Fresnel concave arc rod or a Fresnel convex arc rod; the arc in the arc structure of the fan blade refers to the whole arc or part of the arc or combination of arcs of a perfect circle arc, an elliptical arc, or a parabolic arc.

[0012] A further improvement is that the LED beads are arranged in an arc or fan shape on the fan blade, with the arc or fan shape centered on the center point of the fan blade when it rotates.

[0013] A further improvement is that the display screen also includes a support frame, the control mechanism is connected to the support frame, the support frame is connected to a protective housing, the protective housing has the same shape as the fan blade when it rotates, and an inner cavity is provided inside the protective housing.

[0014] A further improvement is that the control board includes a processing module and a power module, an infrared receiving module, a Bluetooth module, and an SD card interface connected to the processing module. The processing module has a built-in image judgment module, an image parsing module, and an image conversion module. The processing module uses different methods to display and play the input image according to its different types:

[0015] (1) For image files of spherical pixel coordinate values ​​output by spherical image sensors, image files of spherical pixel coordinate values ​​produced by VR production or compositing software, and 3D animations of spherical coordinate values ​​output by 3D software in virtual spherical image sensor camera mode: The image judgment module in the processing module directly transmits the file to the image analysis module. The image analysis module extracts coordinate values, color values, and frame rate data from the meridians or virtual meridians of the spherical image screen. The image analysis data is transmitted to the corresponding LED on the rod-shaped fan blade through the addresser and clock via the data line. The LED lights up according to the input value, the fan blade rotates, and the image is displayed.

[0016] (2) For planar images imaged by a linear imaging model, the image judgment module in the processing module first sends the file to the image conversion module. The image conversion module converts the image file into a spherical image and then sends it to the image analysis module. The image analysis module extracts coordinate values, color values, and frame rate values ​​from the meridians or virtual meridians of the spherical image. The image analysis data is transmitted to the corresponding LEDs on the rod-shaped fan blades via an addresser, a clock, and a data line. The LEDs light up according to the input values, the fan blades rotate, and the image is displayed. The conversion method is as follows:

[0017] First, the original Cartesian coordinate system (X, Y) representation of the pixels in the planar image is converted into a circular coordinate system (D). n The representation of ,θ); where, D n Let D be the distance between the nth image pixel on the diameter of the image and the center point, with the center point as the starting point, and 0 ≤ D. n ≤D, where D is the radius of the planar image, and D is taken from the diagonal or side length of the original rectangular planar image, generally taking the length of the diagonal of the rectangular planar image; θ is the angle between the planar image and other radii with any radius as the starting point, or the angle between the spherical image and other arcs with any arc passing through the center of the image as the starting point, 0≤θ≤360°×n; when the planar or spherical image is a single image, θ=360°; when the planar or spherical image is multiple images, θ=360°×n, where n is the number of times the image is taken;

[0018] Then set the field of view A of the spherical image to be converted, and derive the image radius R of the spherical image, R = cot A × D;

[0019] The value of A is determined by the camera lens used when shooting the video. Different lenses produce images and videos with different field of view angles. The longer the focal length of the lens, the smaller the field of view angle, and the smaller the value of A. For example, when the images output by a 20° telephoto lens, a 60° standard lens, an 84° wide-angle lens, and a 180° fisheye lens are converted into spherical images, the values ​​of A are generally 20°, 60°, 84°, and 180°, respectively.

[0020] Therefore, the coordinates on the plane image are (D n A pixel with diameter d and occupying an area of ​​d2 in the image, θ), is converted to coordinates (L... n The pixel correspondence of θ) spherical image is as follows:

[0021] The arc length of the pixel in the spherical image is:

[0022] The pixel coordinates of the spherical image are

[0023] Diameter value

[0024] The area occupied by the spherical image is

[0025] (L n The spherical coordinate representation of (θ) is a transformation of the spherical coordinate representation of latitude and longitude, consisting of one arc variable and one angle variable. This representation is more convenient to use here; where L nLet L be the length of the arc from the center of the spherical image to the center point, where 0 ≤ L. n ≤L; θ is the angle between a planar image and any other radius with reference to that radius, or the angle between a spherical image and any other arc with reference to that arc passing through the center of the image.

[0026] (3) For planar images imaged by a linear imaging model, the image judgment module within the processing module directly hands the image to the image analysis module. The image analysis module measures the distance from the center of the planar image to the radius of the image frame. The position acquisition length is The color values ​​and frame rate values ​​of the image are transmitted via an addresser and clock through a data line to the nth LED on the curved fan blade, with the center of the fan blade's rotation axis as the starting point. The LED lights up according to the input values, the fan blade rotates, and the image is displayed; where:

[0027] h is the diameter of the LED on the curved rod;

[0028] A is the pre-set central angle corresponding to the arc of the curved rod covered by the playback screen;

[0029] R is the radius of the circle containing the curved rod;

[0030] L represents the total length of the arc of the image covering the curved rod.

[0031] D n Let D be a point on the radius of the planar image, where D is the radius of the planar image, taking the value of either the side length or the diagonal of the rectangular planar image, and 0 ≤ D. n ≤D;

[0032] The central angle A depends on the field of view used by the camera lens when the planar image is captured. The closer the value of A is to the field of view of the captured image, the clearer the image will be and the less distortion there will be. For example, the field of view of images captured by a 20° telephoto lens, a 60° standard lens, an 84° wide-angle lens, and a 180° fisheye lens in fixed-focus mode are 20°, 60°, 84°, and 180°, respectively. The corresponding values ​​of A are 20°, 60°, 84°, and 180°.

[0033] (4) For planar images captured by nonlinear imaging models, the image judgment module in the processing module first transmits the planar image to the image conversion module. The image conversion module converts the image file into a spherical image and then passes it to the image analysis module. The image analysis module extracts coordinate values, color values, and frame rate values ​​from the meridians or virtual meridians of the spherical image. The image analysis data is transmitted to the corresponding LEDs on the rod-shaped fan blades via an addresser, a clock, and a data line. The LEDs light up according to the input values, the fan blades rotate, and the image is displayed. The conversion method is as follows:

[0034] First, the original Cartesian coordinate system (X, Y) representation of the pixels in the planar image is converted into a circular coordinate system (D). n The representation of ,θ); where, D n Let D be the distance between the nth image pixel on the diameter of the image and the center point, with the center point as the starting point, and 0 ≤ D. n ≤D, where D is the radius of the planar image, and D is taken from the diagonal or side length of the original rectangular planar image, generally taking the length of the diagonal of the rectangular planar image; θ is the angle between the planar image and other radii with any radius as the starting point, or the angle between the spherical image and other arcs with any arc passing through the center of the image as the starting point, 0≤θ≤360°×n; when the planar or spherical image is a single image, θ=360°; when the planar or spherical image is multiple images, θ=360°×n, where n is the number of times the image is taken;

[0035] Then set the field of view A of the spherical image to be converted, and derive the image radius R of the spherical image, R = cscA × D;

[0036] The value of A is determined by the camera lens used when shooting the video. Different lenses produce images and videos with different field of view angles. The longer the focal length of the lens, the smaller the field of view angle, and the smaller the value of A. For example, when images shot by a 20° telephoto lens, a 60° standard lens, an 84° wide-angle lens, and a 180° fisheye lens are converted into spherical images, the values ​​of A are generally 20°, 60°, 84°, and 180°, respectively.

[0037] Therefore, the coordinates on the plane image are (D n A pixel with diameter d and occupying an area of ​​d2 in the image, θ), is converted to coordinates (L... n The pixel correspondence of θ) spherical image is as follows:

[0038] The arc length of the pixels in the spherical image:

[0039] The pixel coordinates of the spherical image are

[0040] Diameter value

[0041] The area occupied by the spherical image is

[0042] (L n The spherical coordinate representation of (θ) is a transformation of the spherical coordinate representation of latitude and longitude, consisting of one arc variable and one angle variable. This representation is more convenient to use here; where L n Let L be the length of the arc from the center of the spherical image to the center point, where 0 ≤ L. n ≤L; θ is the angle between a planar image and any other radius with reference to that radius, or the angle between a spherical image and any other arc with reference to that arc passing through the center of the image.

[0043] (5) For planar images imaged by nonlinear imaging models, the image judgment module within the processing module directly hands the image to the image analysis module. The image analysis module takes the center of the rotation axis of the arc-shaped rod as the starting point and measures the distance from the center of the planar image to the radius of the image frame. The position acquisition length is The color value and frame rate value data of the image are transmitted through the addresser and clock via the data line to the nth LED on the arc-shaped fan blade with the center of the fan blade's rotation axis as the starting point. The LED lights up according to the input value, the fan blade rotates, and the image is displayed.

[0044] in:

[0045] h is the diameter of the LED on the curved rod;

[0046] A is the pre-set central angle corresponding to the arc of the curved rod covered by the playback screen;

[0047] R is the radius of the arc of the curved rod;

[0048] L represents the total length of the arc of the image covering the curved rod.

[0049] D n Let D be a point on the radius, and let D be the radius of the planar image, which takes the value of either the side length or the diagonal of the rectangular planar image, where 0 ≤ D. n ≤D;

[0050] The central angle A depends on the field of view used by the camera lens when the planar image is captured. The closer the value of A is to the field of view of the captured image, the clearer the image will be and the less distortion there will be. For example, the field of view of images captured by a 20° telephoto lens, a 60° standard lens, an 84° wide-angle lens, and a 180° fisheye lens in fixed-focus mode are 20°, 60°, 84°, and 180°, respectively. The corresponding values ​​of A are 20°, 60°, 84°, and 180°.

[0051] (6) For playing images and videos that require wearing 3D glasses, the image conversion module in the processing module first converts the image into two images with dual perspectives. Then, the image analysis module extracts the coordinate values, color values, and frame rate values ​​from the two images respectively. The image analysis data transmits the two sets of image data to the even-numbered LED beads and the odd-numbered LED beads that have undergone polarization processing via the addresser and clock via the data line. The even-numbered LED beads and the odd-numbered LED beads are lit up according to the two sets of image data respectively. After the fan blades rotate, two superimposed images are formed, and the audience watches by wearing 3D glasses; or the two image analysis data are transmitted to the LED beads of the two sets of fan blades respectively. The LED beads of the two sets of fan blades are lit up according to the two sets of image data respectively. After the fan blades rotate, two superimposed images are formed, and the audience watches by wearing 3D glasses.

[0052] A further improvement lies in the fact that the arc-shaped fan machine includes both a physical arc-shaped fan machine display screen and a virtual arc-shaped fan machine display screen. When it is a virtual arc-shaped fan machine display screen, the virtual arc-shaped fan machine display screen provides the following functionality and behavior during animation production, post-production processing of live-action videos, or mixed production of animation and live-action videos: the production tool has the ability to insert images and videos into the scene in an arc-shaped fan machine manner. The image insertion function is a behavior that achieves a stereoscopic picture-in-picture display. The difference between this and inserting a picture into a picture in a planar video is that this method can insert high-depth-of-field stereoscopic images into planar or stereoscopic images, a function that previous production tools did not possess.

[0053] It should be further explained that the Fresnel structure used in this arc-shaped fan motor display includes a conventional Fresnel structure and a special Fresnel structure. The conventional Fresnel structure is a Fresnel spherical structure with a flat surface on the whole or the back, while the special Fresnel structure is a Fresnel spherical structure with a curved surface on the whole or the back.

[0054] The beneficial effects of this invention are as follows: Even when playing various conventional videos, the display screen can still present a certain degree of stereoscopic effect, with an even more prominent stereoscopic effect when playing 3D and VR images and videos—something traditional fan units cannot achieve. When applied to VR devices, this display screen significantly improves the field of view while also enhancing image clarity, eliminating image graininess, and significantly reducing dizziness—something similar products cannot do. The entire device has a simple and reasonable structure, is easy to operate, and flexible in use, thus improving the user experience. Attached Figure Description

[0055] Figure 1 A schematic diagram of the structure of this invention;

[0056] Figure 2 Schematic diagrams of conventional concave and convex curved rods, and Fresnel curved rods with concave and convex shapes;

[0057] Figure 3 This is a schematic diagram of the shape of a conventional circular arc rod;

[0058] Figure 4 These are schematic diagrams of the shapes of a conventional elliptical arc rod and a conventional parabolic arc rod;

[0059] Figure 5 A schematic diagram of the shape of a Fresnel circular arc rod;

[0060] Figure 6 Schematic diagrams of the shapes of Fresnel elliptical arc rods and Fresnel parabolic arc rods;

[0061] Figure 7 A schematic diagram illustrating the process of creating a Fresnel circle.

[0062] Figure 8 A schematic diagram illustrating the forming process of rods for Fresnel elliptical arcs and Fresnel parabolic arcs;

[0063] Figure 9 A schematic diagram of a fan screen with two sets of rods forming an arc-shaped rod;

[0064] Figure 10 The distribution of LED beads on the rod is shown in A (arc layout) and B (sector layout).

[0065] Figure 11 A schematic diagram of a fan screen with a protective cover and base;

[0066] Figure 12 This is a schematic diagram illustrating the overall process of converting a planar image into a spherical image.

[0067] Figure 13 A schematic diagram illustrating the conversion of a planar image in linear imaging mode into a spherical image;

[0068] Figure 14 A schematic diagram illustrating the conversion of a planar image into a spherical image in a nonlinear imaging mode;

[0069] Figure 15 This is a schematic diagram illustrating the working principle of this fan.

[0070] Figure 16 This is a schematic diagram of a virtual arc-shaped fan motor display screen;

[0071] Figure 17 A schematic diagram of the cross-section of a concave Fresnel spherical surface;

[0072] Figure 18 A schematic diagram of the cross-section of a convex Fresnel spherical surface;

[0073] In the diagram: 1. Control mechanism; 2. Drive motor; 3. Control board; 4. Fan blade; 5. LED beads; 6. Protective housing; 7. Support component; 8. Inner cavity; 9. Processing module; 10. Data cable. Detailed Implementation

[0074] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0075] Example 1

[0076] like Figure 1 As shown, an arc-shaped rod fan display screen includes a control mechanism 1 and fan blades 4. The control mechanism 1 includes a control board 3 and a drive motor 2. The drive end of the drive motor 2 is connected to the fan blades 4, and the fan blades 4 are arc-shaped rods. There are one or more sets of fan blades 4. When running, they are driven by the connected drive motor 2 to rotate in a spherical shape. LED beads 5 are placed on the outer surface of the fan blades 4 facing the audience. The LED beads 5 are electrically connected to the control board 3. The processing module in the control board 3 parses the input video into image values ​​such as pixel coordinate values, color values, and grayscale values, and transmits the image values ​​to the LED beads 5 at the corresponding positions on the fan blades 4. After receiving the image values, the LED beads 5 light up and emit light with the corresponding color and grayscale. Combined with the rotation of the fan blades, the screen is displayed.

[0077] like Figure 2 As shown, in this invention, the arc-shaped rod-shaped fan blade 4 has a conventional arc-shaped rod shape ( Figure 2 CA\2CB) and Fresnel arc rod ( Figure 2 FA / 2FB); among which, conventional arc-shaped bars include concave arc bars ( Figure 2 CA) or convex arc rod ( Figure 2CB), Fresnel arc bars include Fresnel concave arc bars ( Figure 2 FA) or Fresnel convex arc rod ( Figure 2 FB).

[0078] like Figure 3 , 4 As shown in Figures 5 and 6, the arc of the arc-shaped fan blade 4 is a complete circular ring, an elliptical ring, or a parabolic arc, or a combination of arcs. The circular arc includes conventional circular arcs and Fresnel circular arcs, the ellipse includes conventional elliptical arcs and Fresnel elliptical arcs, and the parabolic arc includes conventional parabolic arcs and Fresnel parabolic arcs. The drive motor 2 drives the fan blade 4 to rotate, correspondingly forming a concave or convex spherical surface, ellipsoidal surface, or parabolic surface, forming a spherical display screen to display images.

[0079] in, Figure 3 In the diagram, A is a quarter-circular circular ring arc-shaped fan blade, B is a half-circular circular ring arc-shaped fan blade, and C is the entire regular circular ring fan blade. Figure 4 In the diagram, A is a curved fan blade that is half a regular ellipse, and B is a curved fan blade that is a regular parabola.

[0080] Figure 5 In the diagram, ① is a semi-Fresnel arc-shaped fan blade, ② is a fully Fresnel arc-shaped fan blade, and ③ is a rod-shaped fan blade composed of multiple Fresnel arcs. Figure 6 A is a Fresnel elliptical arc fan blade, and B is a Fresnel parabolic arc fan blade.

[0081] like Figure 7 , Figure 8 As shown, the Fresnel arc is actually an arc line cut into segments at equal heights, with each segment collapsing onto a straight line. Figure 7 A method for preparing Fresnel circular arc fan blades. Figure 8 A represents the preparation method of Fresnel elliptical arc-shaped fan blades. Figure 8 B represents the preparation method of Fresnel parabolic arc-shaped fan blades.

[0082] like Figure 9 As shown, the number of fan blades 4 is at least one set. When there are two or more sets, the fan blades 4 are arranged in a cross pattern with equal included angles.

[0083] The arc-shaped fan blade 4 can be made of materials such as plastic, metal, or wood, and can be manufactured using methods such as mold making or 3D printing.

[0084] like Figure 10 As shown, in this invention, the LED beads 5 are arranged in an arc on the fan blade 4. Figure 10 (as shown in A) or a fan-shaped layout ( Figure 10As shown in B), the arc or fan-shaped surface is centered on the center point of the fan blade 4 when it rotates.

[0085] The LED bead 4 can be a single primary color, RGB three primary colors, RGBW four primary colors, or multiple primary colors, depending on the needs and requirements. The grayscale can be 64 grayscale levels or 256 grayscale levels, and the light emission mode can be LED self-illumination or backlighting.

[0086] like Figure 11 As shown, in this invention, based on embodiment 1, the display screen further includes a support member 7. The control mechanism 1 is connected to the support member 7. The support member 7 is also connected to a protective housing 6. The protective housing 6 has the same shape as the fan blade 4 when it rotates. The protective housing 6 has an inner cavity 8. The fan blade 4 rotates within the inner cavity 8. The protective housing 6 is made of transparent acrylic material to improve user safety. Its specific shape can be set according to the rotation of the fan blade 4.

[0087] The control board 3 includes a processing module and a power module, an infrared receiving module, a Bluetooth module, and an SD card interface connected to the processing module 9. The processing module 9 can use an IMX6Q processor or other processors. It can be compatible with processing AVI, RMVB, 3GP, and MP4 format planar image pixel coordinate value images and video files as well as spherical image pixel coordinate value images and video files. The drive motor 4 can be a stepper motor. The control board 3 has built-in logic circuits.

[0088] Combined Figure 12-15 As shown, the processing module 9 implements different processing methods to achieve image display based on different input image file types and different desired playback effects, as detailed below:

[0089] (1) For image files of spherical pixel coordinate values ​​output by spherical image sensor, image files of spherical pixel coordinate values ​​produced by VR production or compositing software, and 3D animations of spherical coordinate values ​​output by 3D software in virtual spherical image sensor camera mode: The image judgment module in the processing module 9 directly transmits the file to the image analysis module. The image analysis module extracts coordinate values, color values, and frame rate data from the meridians or virtual meridians of the spherical image screen. The image analysis data is transmitted to the corresponding LED beads 5 on the rod-shaped fan blade 4 through the addresser and clock via the data line 10. The LED beads 5 are lit according to the input values, the fan blade 4 rotates, and the image is displayed.

[0090] (2) For planar images imaged by a linear imaging model, the image judgment module in the processing module 9 first sends the file to the image conversion module. The image conversion module converts the image file into a spherical image and then sends it to the image analysis module. The image analysis module extracts coordinate values, color values, and frame rate values ​​from the meridians or virtual meridians of the spherical image. The image analysis data is transmitted to the corresponding LEDs 5 on the rod-shaped fan blades 4 via the addresser, clock, and data line 10. The LEDs 5 light up according to the input values, the fan blades 4 rotate, and the image is displayed. The conversion method is as follows:

[0091] First, the original Cartesian coordinate system (X, Y) representation of the pixels in the planar image is converted into a circular coordinate system (D). n The representation of ,θ); where, D n Let D be the distance between the nth image pixel on the diameter of the image and the center point, with the center point as the starting point, and 0 ≤ D. n ≤D, where D is the radius of the planar image, and D is taken from the diagonal or side length of the original rectangular planar image, generally taking the length of the diagonal of the rectangular planar image; θ is the angle between the planar image and other radii with any radius as the starting point, or the angle between the spherical image and other arcs with any arc passing through the center of the image as the starting point, 0≤θ≤360°×n; when the planar or spherical image is a single image, θ=360°; when the planar or spherical image is multiple images, θ=360°×n, where n is the number of times the image is taken;

[0092] Then set the field of view A of the spherical image to be converted, and derive the image radius R of the spherical image, R = cot A × D;

[0093] The value of A is determined by the camera lens used when shooting the video. Different lenses produce images and videos with different field of view angles. The longer the focal length of the lens, the smaller the field of view angle, and the smaller the value of A. For example, when the images output by a 20° telephoto lens, a 60° standard lens, an 84° wide-angle lens, and a 180° fisheye lens are converted into spherical images, the values ​​of A are generally 20°, 60°, 84°, and 180°, respectively.

[0094] Therefore, the coordinates on the plane image are (D n A pixel with diameter d and occupying an area of ​​d2 in the image, θ), is converted to coordinates (L... n The pixel correspondence of θ) spherical image is as follows:

[0095] The arc length of the pixel in the spherical image is:

[0096] The pixel coordinates of the spherical image are

[0097] Diameter value

[0098] The area occupied by the spherical image is

[0099] (L n The spherical coordinate representation of (θ) is a transformation of the spherical coordinate representation of latitude and longitude, consisting of one arc variable and one angle variable. This representation is more convenient to use here; where L n Let L be the length of the arc from the center of the spherical image to the center point, where 0 ≤ L. n ≤L; θ is the angle between a planar image and any other radius with reference to that radius, or the angle between a spherical image and any other arc with reference to that arc passing through the center of the image.

[0100] (3) For planar images imaged by a linear imaging model, the image judgment module in the processing module 9 directly hands the image to the image analysis module. The image analysis module measures the distance from the center of the planar image to the radius of the image. The position acquisition length is The color value and frame rate value data of the image are transmitted through the addresser and clock via the data line 10 to the nth LED 5 on the arc-shaped fan blade 4, with the center of the rotation axis of the fan blade 4 as the starting point. The LED 5 lights up according to the input value, the fan blade 4 rotates, and the image is displayed.

[0101] in:

[0102] h is the diameter of the LED on the curved rod;

[0103] A is the pre-set central angle corresponding to the arc of the curved rod covered by the playback screen;

[0104] R is the radius of the circle containing the curved rod;

[0105] L represents the total length of the arc of the image covering the curved rod.

[0106] D n Let D be a point on the radius of the planar image, where D is the radius of the planar image, taking the value of either the side length or the diagonal of the rectangular planar image, and 0 ≤ D. n ≤D.

[0107] The central angle A depends on the field of view used by the camera lens when the planar image is captured. The closer the value of A is to the field of view of the captured image, the clearer the image will be and the less distortion there will be. For example, the field of view of images captured by a 20° telephoto lens, a 60° standard lens, an 84° wide-angle lens, and a 180° fisheye lens in fixed-focus mode are 20°, 60°, 84°, and 180° respectively. Therefore, the corresponding values ​​of A are 20°, 60°, 84°, and 180°.

[0108] (4) For planar images captured by nonlinear imaging models, the image judgment module in the processing module 9 first transmits the planar image to the image conversion module. The image conversion module converts the image file into a spherical image and then passes it to the image analysis module. The image analysis module extracts coordinate values, color values, and frame rate values ​​from the meridians or virtual meridians of the spherical image. The image analysis data is transmitted to the corresponding LEDs 5 on the rod-shaped fan blades 4 via the addresser, clock, and data line 10. The LEDs 5 light up according to the input values, the fan blades 4 rotate, and the image is displayed. The conversion method is as follows:

[0109] First, the original Cartesian coordinate system (X, Y) representation of the pixels in the planar image is converted into a circular coordinate system (D). n The representation of ,θ); where, D n Let D be the distance between the nth image pixel on the diameter of the image and the center point, with the center point as the starting point, and 0 ≤ D. n ≤D, where D is the radius of the planar image, and D is taken from the diagonal or side length of the original rectangular planar image, generally taking the length of the diagonal of the rectangular planar image; θ is the angle between the planar image and other radii with any radius as the starting point, or the angle between the spherical image and other arcs with any arc passing through the center of the image as the starting point, 0≤θ≤360°×n; when the planar or spherical image is a single image, θ=360°; when the planar or spherical image is multiple images, θ=360°×n, where n is the number of times the image is taken;

[0110] Then set the field of view A of the spherical image to be converted, and derive the image radius R of the spherical image, R = cscA × D;

[0111] The value of A is determined by the camera lens used when shooting the video. Different lenses produce images and videos with different field of view angles. The longer the focal length of the lens, the smaller the field of view angle, and the smaller the value of A. For example, when images shot with a 20° telephoto lens, a 60° standard lens, an 84° wide-angle lens, and a 180° fisheye lens are converted into spherical images, the values ​​of A are generally 20°, 60°, 84°, and 180°, respectively.

[0112] Therefore, the coordinates on the plane image are (Dn A pixel with diameter d and occupying an area of ​​d2 in the image, θ), is converted to coordinates (L... n The pixel correspondence of θ) spherical image is as follows:

[0113] The arc length of the pixels in the spherical image:

[0114] The pixel coordinates of the spherical image are

[0115] Diameter value

[0116] The area occupied by the spherical image is

[0117] (L n The spherical coordinate representation of (θ) is a transformation of the spherical coordinate representation of latitude and longitude, consisting of one arc variable and one angle variable. This representation is more convenient to use here; where L n Let L be the length of the arc from the center of the spherical image to the center point, where 0 ≤ L. n ≤L; θ is the angle between a planar image and any other radius referenced from the center of the image, or the angle between a spherical image and any other arc referenced from the center of the image.

[0118] (5) For planar images imaged by nonlinear imaging models, the image judgment module in the processing module 9 directly hands the image to the image analysis module. The image analysis module takes the center of the rotation axis of the arc rod as the starting point and measures the distance from the center of the planar image to the radius of the image frame. The position acquisition length is The color value and frame rate value data of the image are transmitted through the addresser and clock via the data line 10 to the nth LED 5 on the arc-shaped fan blade 4, with the center of the rotation axis of the fan blade 4 as the starting point. The LED 5 lights up according to the input value, the fan blade 4 rotates, and the image is displayed.

[0119] in:

[0120] h is the diameter of the LED on the curved rod;

[0121] A is the pre-set central angle corresponding to the arc of the curved rod covered by the playback screen;

[0122] R is the radius of the circle containing the curved rod;

[0123] L represents the total length of the arc of the image covering the curved rod.

[0124] D nLet D be a point on the radius of the planar image, where D is the radius of the planar image, taking the value of either the side length or the diagonal of the rectangular planar image, and 0 ≤ D. n ≤D.

[0125] The central angle A depends on the field of view used by the camera lens when the planar image is captured. The closer the value of A is to the field of view of the captured image, the clearer the image will be and the less distortion there will be. For example, the field of view of images captured by a 20° telephoto lens, a 60° standard lens, an 84° wide-angle lens, and a 180° fisheye lens in fixed-focus mode are 20°, 60°, 84°, and 180° respectively. Therefore, the corresponding values ​​of A are 20°, 60°, 84°, and 180°.

[0126] (6) For playing images and videos that require wearing 3D glasses, the image conversion module in the processing module 9 first converts the image into two images with dual perspectives. Then, the image analysis module extracts the coordinate values, color values, and frame rate values ​​from the two images respectively. The image analysis data transmits the two sets of image data to the even-numbered LEDs and odd-numbered LEDs that have undergone polarization processing via the addresser and clock via the data line 10. The even-numbered LEDs and odd-numbered LEDs are lit up according to the two sets of image data respectively. After the fan blades rotate, two superimposed images are formed, and the audience watches by wearing 3D glasses. Alternatively, the two image analysis data are transmitted to the LEDs 5 of the two sets of fan blades respectively. The LEDs 5 of the two sets of fan blades are lit up according to the two sets of image data respectively. After the fan blades 4 rotate, two superimposed images are formed, and the audience watches by wearing 3D glasses.

[0127] Example 2

[0128] like Figure 16 As shown, the curved fan motor includes a physical curved fan motor display screen and a virtual curved fan motor display screen. When it is a virtual curved fan motor display screen, the virtual curved fan motor display screen is used in animation production, post-production processing of live-action videos, or mixed production of animation and live-action videos. The production tool has the function and behavior of inserting images and videos into the scene in a curved fan motor manner. The image insertion function is a behavior that achieves a stereoscopic picture-in-picture display. The difference between this and inserting a picture-in-picture into a flat video is that this method can insert high-depth stereoscopic images into the scene of a flat or stereoscopic image, a function that previous production tools did not possess.

[0129] It should be further explained that the Fresnel arc structure used in this arc-shaped fan motor display includes both conventional and special arc-shaped Fresnel structures. The conventional Fresnel arc structure is a single, flat Fresnel spherical arc structure, while the special Fresnel structure is a single, recessed or convex Fresnel arc structure. For example... Figure 17 It is a concave Fresnel concave arc structure. Figure 18 It is a convex Fresnel arc structure.

[0130] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A fan-operated display screen, characterized in that: It includes a control mechanism (1) and a fan blade (4). The control mechanism (1) includes a control board (3) and a drive motor (2). The drive end of the drive motor (2) is connected to the fan blade (4). The fan blade (4) is an arc-shaped rod and rotates into a spherical structure. The outer surface of the fan blade (4) for display is arranged with LED beads (5). The LED beads (5) are electrically connected to the control board (3). The arc structure of the fan blade (4) is a Fresnel arc rod; wherein, the Fresnel arc rod includes a Fresnel concave arc rod or a Fresnel convex arc rod; the arc in the arc structure of the fan blade (4) refers to the whole arc or part of the arc or combination of arcs of a perfect circle arc, elliptical arc, or parabolic arc; The control board (3) includes a processing module (9) and a power module, an infrared receiving module, a Bluetooth module, and an SD card interface connected to the processing module. The processing module (9) has a built-in image judgment module, an image parsing module, and an image conversion module. The processing module (9) displays and plays the input image using different methods according to the different types of the input image: (1) For image files of spherical pixel coordinate values ​​output by spherical image sensor, image files of spherical pixel coordinate values ​​produced by VR production or synthesis software, and 3D animations of spherical coordinate values ​​output by 3D software in virtual spherical image sensor camera mode: The image judgment module in the processing module (9) directly transmits the file to the image analysis module. The image analysis module extracts coordinate values, color values, and frame rate data from the meridians or virtual meridians of the spherical image screen. The image analysis data is transmitted to the corresponding lamp beads (5) on the rod-shaped fan blade (4) through the addresser and clock via the data line (10). The lamp beads (5) are lit according to the input value, the fan blade (4) rotates, and the screen is displayed. (2) For planar images imaged by linear imaging models, the image judgment module in the processing module (9) first sends the file to the image conversion module. The image conversion module converts the image file into a spherical image and then sends it to the image analysis module. The image analysis module extracts coordinate values, color values, and frame rate values ​​from the meridians or virtual meridians of the spherical image. The image analysis data is transmitted to the corresponding LED beads (5) on the rod-shaped fan blade (4) via the addresser and clock via the data line (10). The LED beads (5) are lit according to the input values, the fan blade (4) rotates, and the image is displayed. The conversion method is as follows: First, convert the original Cartesian coordinate system (X, Y) representation of the pixels in the planar image into a circular coordinate system (D). n The representation of ,θ); where, D n Let D be the distance between the nth image pixel on the diameter of the image and the center point, with the center point as the starting point, and 0 ≤ D. n ≤D, where D is the radius of the planar image, and D takes the value of the diagonal or side length of the original rectangular planar image; θ is the angle between the planar image and other radii with reference to any radius of the image, or the angle between the spherical image and other arcs with reference to any arc passing through the center of the image, 0≤θ≤360°×n; when the planar or spherical image is a single image, θ=360°; when the planar or spherical image is multiple images, θ=360°×n, where n is the number of times the image is taken; Then set the field of view A of the spherical image to be converted, and derive the image radius of the spherical image. ; Therefore, the coordinates on the plane image are (D) n A pixel with diameter d and occupying an area of ​​d², θ, is converted to coordinates (L, θ). n The pixel correspondence of the spherical image (θ) is as follows: The arc length of the pixel in the spherical image is: ; The pixel coordinates of the spherical image are ; Diameter value ; The area occupied by the spherical image is ; (L) n The spherical coordinate representation of (θ) is a form transformed from the spherical coordinate representation of latitude and longitude, consisting of an arc variable and an angle variable; where L n Let L be the length of the arc from the center of the spherical image to the center point, where 0 ≤ L. n ≤L; θ is the angle between a planar image and any other radius with reference to that radius, or the angle between a spherical image and any other arc with reference to that arc passing through the center of the image. (3) For planar images imaged by a linear imaging model, the image judgment module in the processing module (9) directly hands the image to the image analysis module. The image analysis module measures the distance from the center of the planar image to the radius of the image. The position acquisition length is The color value and frame rate value data of the image are transmitted through the addresser and clock via the data line (10) to the nth lamp bead (5) on the arc-shaped fan blade (4) with the rotation axis center of the fan blade (4) as the starting point. The lamp bead (5) is lit according to the input value, the fan blade (4) rotates, and the image is displayed. in: h is the diameter of the LED on the curved rod; A is the pre-set central angle corresponding to the arc of the curved rod covered by the playback screen; R is the radius of the circle containing the curved rod; L represents the total length of the arc of the image covering the curved rod. ; D n Let D be a point on the radius of the planar image, where D is the radius of the planar image, taking the value of either the side length or the diagonal of the rectangular planar image, and 0 ≤ D. n ≤D; (4) For the planar image of the nonlinear imaging model, the image judgment module in the processing module (9) first transmits the planar image to the image conversion module. The image conversion module converts the image file into a spherical image and then passes it to the image analysis module. The image analysis module extracts the coordinate value, color value, and frame rate value data from the meridian or virtual meridian of the spherical image. The image analysis data is transmitted to the corresponding lamp bead (5) on the rod-shaped fan blade (4) through the addresser and clock via the data line (10). The lamp bead (5) lights up according to the input value, the fan blade (4) rotates, and the image is displayed. The conversion method is as follows: First, convert the original Cartesian coordinate system (X, Y) representation of the pixels in the planar image into a circular coordinate system (D). n The representation of ,θ); where, D n Let D be the distance between the nth image pixel (0 ≤ D) on the diameter of the image, starting from the center point of the image. n ≤D, where D is the radius of the planar image, and D takes the value of the diagonal or side length of the original rectangular planar image; θ is the angle between the planar image and other radii with reference to any radius of the image, or the angle between the spherical image and other arcs with reference to any arc passing through the center of the image, 0≤θ≤360°×n; when the planar or spherical image is a single image, θ=360°; when the planar or spherical image is multiple images, θ=360°×n, where n is the number of times the image is taken; Then set the field of view A of the spherical image to be converted, and derive the image radius of the spherical image. ; Therefore, the coordinates on the plane image are (D) n A pixel with diameter d and occupying an area of ​​d², θ, is converted to coordinates (L, θ). n The pixel correspondence of the spherical image (θ) is as follows: The arc length of the pixel in the spherical image is: ; The pixel coordinates of the spherical image are ; Diameter value ; The area occupied by the spherical image is ; (L) n The spherical coordinate representation of (θ) is a form transformed from the spherical coordinate representation of latitude and longitude, consisting of an arc variable and an angle variable; where L n Let L be the length of the arc from the center of the spherical image to the center point, where 0 ≤ L. n ≤L; θ is the angle between a planar image and any other radius with reference to that radius, or the angle between a spherical image and any other arc with reference to that arc passing through the center of the image. (5) For planar images imaged by nonlinear imaging models, the image judgment module in the processing module (9) directly hands the image to the image analysis module. The image analysis module takes the center of the rotation axis of the arc rod as the starting point and measures the distance from the center of the planar image to the radius of the image. The position acquisition length is The color value and frame rate value data of the image are transmitted through the addresser and clock via the data line (10) to the nth lamp bead (5) with the rotation axis center of the fan blade (4) as the starting point. The lamp bead (5) is lit according to the input value, the fan blade (4) rotates, and the image is displayed. in: h is the diameter of the LED on the curved rod; A is the pre-set central angle corresponding to the arc of the curved rod covered by the playback screen; R is the radius of the circle containing the curved rod; L represents the total length of the arc of the image covering the curved rod. ; D n Let D be a point on the radius of the planar image, where D is the radius of the planar image, taking the value of either the side length or the diagonal of the rectangular planar image, and 0 ≤ D. n ≤D; (6) For playing images and videos that require wearing 3D glasses, the image conversion module in the processing module (9) first converts the image into two images with dual perspectives. Then, the image analysis module extracts the coordinate values, color values, and frame rate values ​​from the two images respectively. The image analysis data transmits the two sets of image data to the even-numbered LED beads and the odd-numbered LED beads that have undergone polarization processing through the addresser and clock via the data line (10). The even-numbered LED beads and the odd-numbered LED beads are lit up according to the two sets of image data respectively. After the fan blades rotate, two superimposed images are formed, and the audience watches them by wearing 3D glasses. Alternatively, the two sets of image analysis data are transmitted to the LED beads of the two sets of fan blades respectively. The LED beads of the two sets of fan blades are lit up according to the two sets of image data respectively. After the fan blades rotate, two superimposed images are formed, and the audience watches them by wearing 3D glasses.

2. The fan-operated display screen according to claim 1, characterized in that: The fan blades (4) are one or more sets, and when there are multiple sets of fan blades (4), the fan blades are arranged in a cross pattern with equal included angles.

3. A fan-operated display screen according to claim 1, characterized in that: The arc structure of the fan blade (4) is a conventional arc rod; wherein, the conventional arc rod includes a concave arc rod or a convex arc rod.

4. A fan-operated display screen according to claim 1, characterized in that: The lamp beads (5) are arranged in an arc or fan shape on the fan blade, with the arc or fan shape centered on the center point of the fan blade (4) when it rotates.

5. A fan-operated display screen according to claim 1, characterized in that: The display screen also includes a bracket (7), the control mechanism (1) is connected to the bracket (7), the bracket (7) is connected to a protective housing (6), the protective housing (6) has the same shape as the fan blade (4) when it rotates, and an inner cavity (8) is provided inside the protective housing (6).

6. A fan-operated display screen according to claim 1, characterized in that: The curved pole fan includes a physical curved pole fan display screen and a virtual curved pole fan display screen.

Images