Light field display system

Abstract

This invention discloses a light field display system. The light field display system includes at least one display device and a support structure. The display device includes a projection module and at least one refractive module. The support structure is rotatable about its central axis. The display device is fixed to the support structure. Along the rotation direction of the support structure, the projection image source area of ​​the projection module includes at least one image source sub-area corresponding to each of the at least one refractive module. The refractive module is located on the imaging surface of the image source sub-area. The refractive module is arc-shaped, and its first center is located on the side away from the central axis. The refractive module is configured to deflect the emitted light beam from the image source sub-area towards the first center, and the divergence angle of the emitted light beam from the refractive module in the rotation direction is greater than the divergence angle of the emitted light beam from the image source sub-area. This invention can expand the viewing angle of the light field display system.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a light field display system. Background Technology

[0002] Light field display systems can achieve stereoscopic display and have important applications in the field of modern display technology.

[0003] However, light field display systems in related technologies suffer from a small viewing angle, limiting their further application. Existing technologies (such as lenticular lenses) suffer from the fundamental contradiction of "field of view and resolution mutually exclusive," while single-path projection suffers from "limited field of view" and "discontinuous stitching." Summary of the Invention

[0004] This invention provides a light field display system to expand the viewing angle of the light field display system.

[0005] According to one aspect of the present invention, a light field display system is provided, the light field display system comprising at least one display device and a support structure, the display device comprising a projection module and at least one refractive module; The support structure is capable of rotating around its own central axis; the display device is fixed to the support structure; Along the rotation direction of the support structure, the projection image source area of ​​the projection module includes at least one image source sub-region corresponding to the at least one refractive module; the refractive module is located on the imaging surface of the image source sub-region; The refractive module is arc-shaped, and the first center of the refractive module is located on the side of the refractive module away from the central axis; the refractive module is configured to deflect the emitted light beam from the image source sub-region toward the first center, and the divergence angle of the emitted light beam from the refractive module in the rotation direction is greater than the divergence angle of the emitted light beam from the image source sub-region.

[0006] Optionally, the refractive module includes a refractive film and an optical film, wherein the refractive film is located between the optical film and the projection module; The center of both the refractive film and the optical film is the first center; The refractive film is used to deflect the emitted light beam from the image source region toward the first center; the optical film is used to expand the incident light beam along a first direction; the first direction is parallel to the central axis.

[0007] Optionally, the number of the at least one refractive module is one; the number of the image source sub-regions is one; The refractive module is used to deflect the emitted light beam from the projected image source area toward the first center.

[0008] Optionally, the number of the at least one refractive module is three; the number of the at least one image source sub-region is three, and the size of each image source sub-region is the same along the rotation direction; the at least one refractive module includes a first refractive module, a second refractive module, and a third refractive module; along the rotation direction, the first refractive module and the third refractive module are respectively located on both sides of the second refractive module; the at least one image source sub-region includes a first image source sub-region corresponding to the first refractive module, a second image source sub-region corresponding to the second refractive module, and a third image source sub-region corresponding to the third refractive module; The light field display system also includes a first reflector and a second reflector; The first reflector is used to deflect the emitted light beam from the first image source sub-region toward a side away from the second refractive module; the first refractive module is located in the light output path of the first reflector; The second reflector is used to deflect the emitted light beam from the third image source region toward a side away from the second refractive module; the third refractive module is located in the light output path of the second reflector; The light beam emitted from the second image source region is directly incident on the second refractive module.

[0009] Optionally, along the rotation direction, the first refractive module, the second refractive module, and the third refractive module are arranged sequentially; the refractive module includes a first end and a second end arranged in the rotation direction; The radius of the first circle, whose center is located on the central axis and which is tangent to both the line connecting the first circle corresponding to the second refractive module to the first end of the second refractive module and the line connecting the first circle to the second end, is greater than the radius of the second circle. The center of the second circle is located on the central axis; and the line connecting the second circle to the first end of the first refractive module corresponding to the first refractive module, and the line connecting the first center of the third refractive module corresponding to the second end of the third refractive module, are all tangent.

[0010] Optionally, when the at least one refractive module is in the first preset position, the first center of the second refractive module points to the second line connecting the second end of the second refractive module, and when the at least one refractive module is rotated to the second preset position, the first center of the first refractive module is parallel to the third line connecting the first end of the first refractive module. The first image source sub-region and the second image source sub-region are configured to provide display light to the display pixels located between the second and third connecting lines through frame synchronization; When the at least one refractive module is in the first preset position, the first line connecting the first center of the second refractive module to the first end of the second refractive module is parallel to the fourth line connecting the first center of the third refractive module to the second end of the third refractive module when the at least one refractive module is rotated to the second preset position. The first image source sub-region and the third image source sub-region are configured to provide display light to the display pixels located between the first and fourth connecting lines via frame synchronization.

[0011] Optionally, the light field display system further includes a tracking module for tracking the viewpoint position; The projection module is configured to calibrate the display data corresponding to each of the image source sub-regions according to the viewpoint position.

[0012] Optionally, the display device includes at least two of the refractive modules; the first centers corresponding to different refractive modules are arranged on the same cylindrical surface.

[0013] Optionally, the at least one display device includes at least two display device groups distributed along the rotation direction, each display device group including at least one display device arranged along a first direction; the support structure includes at least two lamp posts corresponding one-to-one with the at least two display device groups, the display device groups being fixed to the lamp posts; the first direction is parallel to the central axis.

[0014] Optionally, along the rotation direction, at least one side of the display device assembly is provided with a light-blocking structure; the light-blocking structure is fixed to the lamp post.

[0015] Optionally, at least two of the display device groups are evenly distributed along the rotation direction.

[0016] Optionally, the projection module includes a projection lens and a display chip; the light-emitting surface of the display chip, the principal plane of the projection lens, and the imaging surface satisfy Scherm's law.

[0017] Optionally, the support structure includes a lamp post extending along a first direction, and the light field display system includes a plurality of display devices disposed on the lamp post and arranged along the first direction; the projection module of the display device located at the edge of the lamp post is tilted towards the side of the refractive module at one end away from the center of the lamp post, and the tilt angle is positively correlated with the distance between the center of the display device and the center of the lamp post.

[0018] Optionally, the edge portion of the lamp post is tilted toward one side of the refractive module.

[0019] Optionally, the lamp post extends in a direction parallel to the central axis; when the support structure rotates, the first end of the lamp post moves on the first trajectory circle, and the second end of the lamp post moves on the second trajectory circle; The light field display system further includes a first extended viewing angle module, which includes a first auxiliary lamp post, a plurality of vector pixels disposed on the first auxiliary lamp post, and a third reflector; the first end of the first auxiliary lamp post is offset from the first end of the lamp post; and when the support structure rotates, the first end of the first auxiliary lamp post moves on the first trajectory circle; the second end of the first auxiliary lamp post is located between the plane containing the first trajectory circle and the plane containing the second trajectory circle; the orthographic projection of the first auxiliary lamp post on the plane containing the first trajectory circle is located radially on the first trajectory circle; and the angle between the first auxiliary lamp post and the plane containing the first trajectory circle is greater than 0 degrees and less than 90 degrees; the third reflector is located on the plane containing the first trajectory circle and faces the first auxiliary lamp post; And / or, the light field display system further includes a second extended viewing angle module, the second extended viewing angle module including a second auxiliary lamp post, a plurality of vector pixels disposed on the second auxiliary lamp post, and a fourth reflector; the first end of the second auxiliary lamp post is offset from the second end of the lamp post; and when the support structure rotates, the first end of the second auxiliary lamp post moves on the second trajectory circle; the second end of the second auxiliary lamp post is located between the plane containing the first trajectory circle and the plane containing the second trajectory circle; the orthographic projection of the second auxiliary lamp post on the plane containing the second trajectory circle is located radially on the second trajectory circle; and the angle between the second auxiliary lamp post and the plane containing the second trajectory circle is greater than 0 degrees and less than 90 degrees; the fourth reflector is located on the plane containing the second trajectory circle, and the fourth reflector faces the second auxiliary lamp post.

[0020] Optionally, the light field display system further includes a prism film, which is disposed corresponding to the lamp post; the prism film is used to deflect the emitted light from the projection module located at the edge of the lamp post toward the center of the lamp post by a preset angle.

[0021] The technical solution of this invention employs a light field display system comprising at least one display device and a support structure. The display device includes a projection module and at least one refractive module. The support structure is rotatable around its central axis. The display device is fixed to the support structure. Along the rotation direction of the support structure, the projection image source area of ​​the projection module includes at least one image source sub-area corresponding to at least one refractive module. The refractive module is located on the imaging surface of the image source sub-area. The refractive module is arc-shaped, and its first center is located on the side away from the central axis. The refractive module is configured to deflect the emitted light beam from the image source sub-area towards the first center, and the divergence angle of the emitted light beam from the refractive module in the rotation direction is greater than the divergence angle of the emitted light beam from the image source sub-area. By setting the divergence angle of the emitted light beam from the refractive module to be greater than the divergence angle of the emitted light beam from the image source sub-area, the viewing angle of the light provided by the corresponding image source sub-area to each display pixel can be increased, thereby expanding the horizontal viewing angle of the light field display system.

[0022] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a light field display system provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a refractive module provided in an embodiment of the present invention; Figure 3 for Figure 2 A magnified view of a portion of the image; Figure 4 for Figure 2 A magnified view of the central region Z2; Figure 5 This is a schematic diagram of the structure of another light field display system provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of a projected image source area provided in an embodiment of the present invention; Figure 7 A schematic diagram illustrating the display screen width of a light field display system provided in an embodiment of the present invention; Figure 8This is a schematic diagram of the structure of another light field display system provided in an embodiment of the present invention; Figure 9 This is a top view of a light field display system provided in an embodiment of the present invention; Figure 10 This is a schematic diagram of a structure in which multiple display devices are arranged in a first direction, according to an embodiment of the present invention. Figure 11 This is a schematic diagram of the structure of a lamp post provided in an embodiment of the present invention; Figure 12 This is a schematic diagram of the structure of another light field display system provided in an embodiment of the present invention; Figure 13 This is a schematic diagram of another light field display system provided in an embodiment of the present invention. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0027] Figure 1 This is a schematic diagram of a light field display system provided in an embodiment of the present invention, with reference to... Figure 1The light field display system includes at least one display device 1 and a support structure 2; the display device 1 includes a projection module 11 and at least one refractive module 12. The support structure 2 is rotatable about its central axis. The display device is fixed to the support structure 2. Along the rotation direction R of the support structure 2, the projection area of ​​the projection module 11 includes at least one image source sub-region corresponding to at least one refractive module 12; the refractive module 12 is located on the imaging surface of the image source sub-region. The refractive module 12 is arc-shaped, and the first center O1 of the refractive module 12 is located on the side of the refractive module 12 away from the central axis L1. The refractive module 12 is configured to deflect the emitted light beam from the image source sub-region toward the first center O1. The divergence angle of the emitted light beam from the refractive module 12 is defined as a first divergence angle A1, and the divergence angle of the emitted light beam from the image source sub-region is defined as a second divergence angle A2. The first divergence angle A1 is greater than the second divergence angle A2.

[0028] Specifically, the light field display system can achieve stereoscopic display. The basic display principle of the light field display system is as follows: Display pixels are formed on the imaging surface using the projection module 11. These display pixels can emit display light to different positions in space, achieving stereoscopic display by displaying images with parallax at different positions. The projection module 11 can include a dense display device and a projection lens. The projection module 11 can be understood as a vector pixel, an optical device that satisfies the following conditions: 1. Point light source with a narrow beam. Relative to a large display scale, it can be approximated as a point-emitting light source (e.g., the light source occupies less than one ten-thousandth of the display area). Most of the beams emitted into space have the following properties: if the light intensity drops to 50% of the maximum light intensity of the beam as the boundary of the beam, and the light source is the center, the minimum spatial spherical angle that can encompass all boundaries is less than 10 degrees. 2. It can support the projection of the above beams in at least 100 distinguishable directions. 3. It can emit the above beams simultaneously in two or more directions. 4. The brightness of the above beams supports at least 16 adjustable levels.

[0029] Support structure 2 can rotate to form a circular trajectory. Figure 1 The support structure 2 shown in the diagram represents the corresponding rotation trajectory. The light-emitting surface of the projection module 11 faces the inner wall of this trajectory. In some embodiments, the central axis L1 of the support structure 2 is parallel to the first direction Z, which can be a vertical direction. For ease of explanation later, this document defines a first direction Z, a second direction Y, and a third direction X that are mutually perpendicular, and defines the rotation direction R of the support structure 2. The center of the rotation direction R is located on the central axis L1.

[0030] The light-emitting surface of the projection module 11 faces the inner wall of the support structure 2. As the support structure 2 rotates, the projection module 11 rotates at the same angular velocity, and the emitted beam of the projection module 11 scans various angles in space in sequence to form a 360-degree surround display.

[0031] The projection image source area of ​​the projection module 11 includes at least one image sub-source area, and each image sub-source area corresponds to one refractive module 12. The projection image source area is the area corresponding to the light-emitting surface of the projection module 11, or it can be understood as the display area of ​​the dense display device in the projection module 11. The projection image source area includes at least one image sub-source area, and different image sub-source areas correspond to different refractive modules 12.

[0032] The imaging surface of the projection module 11 is also the image focusing surface, and the image formed by the projection module 11 on the imaging surface is the clearest. The emitted beam of the projection module 11 has a second divergence angle A2, which is the angle between the two outermost emitted rays of the projection module 11. In the light field display system of related technologies, the horizontal viewing angle is close to the second divergence angle A2. However, the second divergence angle A2 is generally not too large, which results in the horizontal viewing angle of the light field display system not being too large.

[0033] In this embodiment, the horizontal viewing angle can be expanded by setting a refractive module 12 and adjusting the relative position of the refractive module 12 and the projection module 11. More specifically, the refractive module 12 is set on the imaging surface of the projection module 11, the refractive module 12 is arc-shaped, and the refractive module 12 convexes towards one side of the projection module 11. The refractive module 12 can also deflect the incident light beam. It can be understood that the incident light beam of the refractive module 12 is also the outgoing light beam of the projection module 11. For each image source sub-region, its corresponding outgoing light beam is deflected after entering the refractive module 12. Figure 1 For example, since the light field display system is a rotating display, for any given display pixel, the collection of light rays emitted from all angles can be understood as a single beam, and the divergence angle of this beam is the horizontal viewing angle of the light field display system. It should be noted that the light rays emitted from all angles by the display pixel are not emitted at a single moment, but rather at different times. Due to the refracting effect of the refractive module 12, in this embodiment, for any given display pixel, the divergence angle of all light rays incident upon it is related to the first divergence angle A1 and the rotation angle of the refractive module 12 when all emitted light rays pass through that display pixel, and this divergence angle is positively correlated with both of these parameters. By setting the first divergence angle A1 to be greater than the divergence angle of the corresponding image source sub-region, it can be ensured that the light viewing angle provided by the corresponding image source sub-region to each display pixel is increased, thereby expanding the horizontal viewing angle of the light field display system.

[0034] The technical solution of this embodiment employs a light field display system including at least one display device and a support structure. The display device includes a projection module and at least one refractive module. The support structure is rotatable around its central axis. The display device is fixed to the support structure. Along the rotation direction of the support structure, the projection image source area of ​​the projection module includes at least one image source sub-area corresponding to at least one refractive module. The refractive module is located on the imaging surface of the image source sub-area. The refractive module is arc-shaped, and its first center is located on the side away from the central axis. The refractive module is configured to deflect the emitted light beam from the image source sub-area towards the first center, and the divergence angle of the emitted light beam from the refractive module is greater than the divergence angle of the emitted light beam from the image source sub-area. By setting the divergence angle of the emitted light beam from the refractive module to be greater than the divergence angle of the emitted light beam from the image source sub-area, the viewing angle of the light provided by the corresponding image source sub-area to each display pixel can be increased, thereby expanding the horizontal viewing angle of the light field display system.

[0035] It should be noted that the refractive module 12 in this embodiment actually functions to converge light, and its divergence angle can be understood as the angle between the line connecting the first end B1 and the first center O1 and the line connecting the second end B2 and the first center O1.

[0036] Optionally, Figure 2 This is a schematic diagram of the structure of a refractive module provided in an embodiment of the present invention. Figure 3 for Figure 2 A magnified view of a portion of the image, in which... Figure 3 for Figure 2 A magnified view of the central region Z1. Figure 4 for Figure 2 A magnified view of region Z2. In some embodiments, the refractive module 12 includes a refractive film 122 and an optical film 121. The refractive film 122 is located between the optical film 121 and the projection module. The centers of both the refractive film 122 and the optical film 121 are the first center. The refractive film 122 is used to deflect the emitted light beam from the image source sub-region toward the first center O1; the optical film 121 is used to expand the incident light beam along the first direction Z.

[0037] Specifically, the refractive film 122 is located in the optical path between the optical film 121 and the projection module 11. In other words, the beam emitted from the projection module 11 must first pass through the refractive film 122 before it can be incident on the optical film 121.

[0038] The optical film 121 is, for example, a cylindrical lens grating. The optical film 121 can open the incident light beam unidirectionally in the first direction Z, that is, the vertical direction, while keeping the viewing angle unchanged in the horizontal direction.

[0039] When the incident light beam on the optical film 121 has different angles relative to the normal of the optical film 121, the shape of the light spot formed after being expanded by the optical film 121 will be different, which may cause bending and deformation, resulting in image distortion. This deformation is more serious when the horizontal viewing angle is large. In this embodiment, the refractive film 122 is set to deflect all the incident light beams to the center of the optical film 121, so that all the light incident on the optical film 121 is perpendicular to the normal of the optical film 121. The light beam after being expanded by the optical film 121 will not be bent or deformed, and the relative shape of the light beams at different positions of the optical film 121 after being expanded will not be deformed. That is to say, the refractive module 12 of this embodiment can also ensure that the displayed image will not be distorted when the horizontal viewing angle is large.

[0040] In some embodiments, the imaging surface of the projection module 11 is optionally located on the optical film 121.

[0041] Optionally, such as Figure 3 and Figure 4 As shown, the refractive film 122 can be a linear Fresnel film. The side of the refractive film 122 closest to the projection module 11 can have a sawtooth structure, thereby deflecting the incident light beam toward the first center L1. The sawtooth on the two edges of the refractive film 122 has different orientations, and the middle part of the refractive film 122 can be straight or nearly straight.

[0042] Optionally, such as Figure 1 As shown, the number of at least one refractive module 12 is one; the number of image source sub-regions is one. The refractive module 12 is used to deflect the emitted light beam from the projected image source region toward the first center.

[0043] Specifically, in this embodiment, a refractive module 12 is used to expand the second divergence angle A2 corresponding to the projected image source area. When the refractive module 12 is in the first position, it is represented by a virtual refractive module 12'. At this time, the projection module 11 is represented by a virtual projection module 11'. For any display pixel, for example, for the display pixel corresponding to the first end B1 in the first position, in the first position, the first end of the virtual refractive module 12' provides display light to the display pixel, and the display light is deflected towards the first center of the virtual refractive module 12'. When the refractive module 12 rotates from the first position to the second position, the second end B2 of the refractive module 12 provides display light to the display pixel, and the display light is deflected towards the first center O1 of the refractive module 12. When the refractive module 12 moves continuously between the first position and the second position, it provides display light with continuously changing angles to the display pixel. That is, the display pixel can emit light with a divergence angle less than or equal to the third divergence angle A3, and the horizontal viewing angle of the light field display system is the third divergence angle A3.

[0044] Optionally, Figure 5This is a schematic diagram of another light field display system provided in an embodiment of the present invention. Figure 6 This is a schematic diagram of a projected image source area provided in an embodiment of the present invention. (Reference) Figure 5 and Figure 6 In this embodiment, the image source of the projection module is pre-divided into multiple image source sub-regions. Each image source sub-region is projected onto a corresponding refractive module via an independent optical path (direct or reflected). After being deflected by the refractive module, they are spliced ​​together in space to form a continuous large-viewing-angle light field. Optionally, in this embodiment, the number of at least one refractive module is three; the number of at least one image source sub-region is three. Along the rotation direction R, the size of each image source sub-region is the same. At least one refractive module includes a first refractive module 12A, a second refractive module 12B, and a third refractive module 12C; along the rotation direction R, the first refractive module 12A and the third refractive module 12C are located on both sides of the second refractive module 12B; at least one image source sub-region includes a first image source sub-region AAA corresponding to the first refractive module 12A, a second image source sub-region AAB corresponding to the second refractive module 12B, and a third image source sub-region AAC corresponding to the third refractive module 12C. The light field display system also includes a first reflector 13 and a second reflector 14. The first reflector 13 is used to deflect the emitted light beam from the first image source sub-region AAA to a side away from the second refractive module 12B; the first refractive module 12A is located in the light output path of the first reflector 13; the second reflector 14 is used to deflect the emitted light beam from the third image source sub-region AAC to a side away from the second refractive module 12B; the third refractive module 12C is located in the light output path of the second reflector 14; the emitted light beam from the second image source sub-region AAB is directly incident on the second refractive module 12B.

[0045] Specifically, in this embodiment, the projected image source area is divided into three image source sub-regions. Each image source sub-region contains the same number of columns of sub-pixels of the dense display devices. The column direction is also the first direction. At a certain moment, a column of display pixels can be provided with display light at a corresponding angle by a column of sub-pixels. Display light at different angles of a column of display pixels can be provided by sub-pixels of different columns at different times. The divergence angle corresponding to the image source sub-region is one-third of the divergence angle of the projection module. The emitted light beam from the first image source sub-region AAA is reflected by the first reflector 13 and then incident on the first refractive module 12A. Along the rotation direction R, the first reflector 13 is closer to one end of the second refractive module 12B and even closer to the projection module 11. With this configuration, the light rays corresponding to the two edges of the first image source sub-region AAA have similar optical path lengths after incident on the first refractive module 12A, enabling the projection module to image onto the first refractive module. The overall structure composed of the second reflecting mirror 14, the third refractive module 12C, the second refractive module 12B, the first refractive module 12A, and the first reflecting mirror 13 is an axisymmetric structure, and the axis of symmetry intersects the central axis L1. It should be noted that, since the projection module 11 has a certain depth of field, the imaging surfaces of different image source sub-regions of the projection module 11 can all be focused onto the corresponding refractive modules.

[0046] Once the light field display system is installed, the width of the displayed image is determined. The second refractive module 12B provides a small-angle light source for the middle segment of the display. Because the reflector deflects the light rays emitted from the image source areas on both sides outwards, the light emitted from the refractive modules 12 on both sides has a larger angle, thus providing the large-angle light required for large-format displays. It can be understood that the larger the horizontal viewing angle of the light field display system, the wider the corresponding display image.

[0047] Optionally, in some embodiments, the projection module 11 and the refractive module 12 may be located on opposite sides of the central axis L1. In other embodiments, the projection module 11 and the refractive module 12 may be located on the same side of the central axis L1.

[0048] Optionally, in some embodiments, both ends of the second refractive module 12B are located on the rotation trajectory circle corresponding to the support structure 2. The end of the first refractive module 12A near the second refractive module 12B is located on this trajectory circle, and the first reflector 13 is positioned in space between the first refractive module 12A and the second refractive module 12B. The end of the third refractive module 12C near the second refractive module 12B is located on this trajectory circle, and the second reflector 14 is positioned in space between the third refractive module 12C and the second refractive module 12B.

[0049] The end of the first refractive module 12A furthest from the second refractive module 12B, after being mirrored by the first reflector 13, can be located on the trajectory circle and can be connected to the end of the second refractive module 12B closest to the first refractive module 12A. The end of the third refractive module 12C furthest from the second refractive module 12B, after being mirrored by the second reflector 14, can be located on the trajectory circle and can be connected to the end of the second refractive module 12B closest to the third refractive module 12C. This arrangement makes the distance between the different refractive modules closer, achieving a wide viewing angle while making the imaging surfaces corresponding to the different refractive modules closer, meaning the display pixels are also closer to being on the same plane.

[0050] Continue to refer to Figure 5 The angle between the line connecting the end of the first refractive module 12A near the second refractive module 12B to the central axis L1, and the line connecting the end of the first refractive module 12A near the second refractive module 12B to the corresponding first center O1A, is the fourth divergence angle A4. For any display pixel, the corresponding divergence angle is 2×A4. The first refractive module 12A and the third refractive module 12C are used to provide light at large angles, while the second refractive module 12B is used to provide light at small angles.

[0051] Optionally, continue to refer to Figure 5 Along the rotation direction R, the first refractive module 12A, the second refractive module 12B, and the third refractive module 12C are arranged sequentially. Each refractive module includes a first end and a second end arranged along the rotation direction R. The radius of the first circle CI1, whose center is located on the central axis and is tangent to both the line connecting the first center of the second refractive module 12B to its first end and the line connecting it to its second end, is greater than the radius of the second circle CI2. The center of the second circle CI2 is located on the central axis L1, and the line connecting the second circle CI2 to the first center of the first refractive module 12A to its first end, and the line connecting the first center of the third refractive module 12C to its second end, are all tangent.

[0052] Specifically, the first center of the second refractive module 12B is defined as the second first center O1B. The line connecting the second first center O1B to the first end of the second refractive module 12B is defined as the first connecting line LI1, and the line connecting the second first center O1B to the second end of the second refractive module 12B is defined as the second connecting line LI2. The center of the first circle CI1 is located on the central axis L1, and the first circle CI1 is tangent to both the first connecting line LI1 and the second connecting line LI2.

[0053] The line connecting the first center O1A of the first circle to the first end of the first refractive module 12A is defined as the third line LI3. The first center of the third refractive module 12C is defined as the third center O1C. The line connecting the third center O1C to the second end of the third refractive module 12C is defined as the fourth line LI4. The center of the second circle CI2 is located on the central axis L1, and the second circle CI2 is tangent to both the third line LI3 and the fourth line LI4.

[0054] Assume that the points on the trajectory circle of the support structure 2 are light-emitting points. For any light-emitting point, when the second refractive module 12B is directly opposite the light-emitting point, that is, when the line connecting the center of the second refractive module 12B and the light-emitting point passes through the center of the trajectory circle, the second refractive module 12B provides light to the light-emitting point at a 0-angle angle. The second refractive module 12B along... Figure 5 As shown, when the light is swept counterclockwise around the light-emitting point, the second end provides a third-angle light beam to the light-emitting point when it passes the point; this third angle is positive. When the first end passes the light-emitting point, it provides a negative third-angle light beam. In other words, the second refractive module 12B can provide an angle range from a negative third angle to a positive third angle to the light-emitting point.

[0055] When the first refractive module 12A scans counterclockwise across the light-emitting point, its second end passes through the light-emitting point first, providing light at a first angle; its first end then passes through the light-emitting point, providing light at a second angle. Due to the reflection of the light by the mirror, the first angle is greater than the second angle. That is, the angle range provided by the first refractive module 12A to the light-emitting point is from the second angle to the first angle. This angle range is, for example, a positive angle range. Similarly, the third refractive module 12C can also provide an angle range from the second angle to the first angle to the light-emitting point, but this angle range is a negative angle range.

[0056] In this embodiment, the radius of the first circle CI1 is set to be larger than the radius of the second circle CI2, which ensures that the first angle is smaller than the third angle. In other words, the angular range of the light provided by the second refractive module 12B to the light-emitting point overlaps with the angular range of the light provided by the first refractive module 12A to the light-emitting point; and the angular range of the light provided by the second refractive module 12B to the light-emitting point overlaps with the angular range of the light provided by the third refractive module 12C to the light-emitting point. In this way, the three refractive modules can provide the light-emitting point with a continuous angular light without any breaks, thereby ensuring that the light fields corresponding to the three refractive modules are smoothly connected at the edges without any blind spots in the viewing angle.

[0057] Optionally, in some embodiments, the horizontal viewing angle of the light field display system is related to the diameter of the trajectory circle, the refraction of light by the refractive module, and the angle of the reflector. The horizontal viewing angle of the light field display system can be adjusted by adjusting at least one of these three factors.

[0058] Optionally, such as Figure 7 As shown, Figure 7 This is a schematic diagram illustrating the display screen width of a light field display system provided in an embodiment of the present invention. The previously mentioned light-emitting points located on the trajectory circle of the support structure 2 are merely illustrative. In fact, the points on the third circle CI3, passing through the first center O1A and the third center O1C, should be understood as light-emitting points. The emitted light rays from the first refractive module 12A and the third refractive module 12C converge on the third circle CI3, meaning that points on the third circle CI3 can emit light in all directions and can be considered as light-emitting points. The imaging surface is located on the refractive modules. For simplicity, the imaging surface is assumed to be a plane, which can be considered tangent to the second refractive module 12B. The width of the area H1 where the imaging surface intersects with the third circle CI3 is the width of the display screen.

[0059] Optionally, when at least one refractive module is in the first position, the first center of the second refractive module points to the second connection line LI2 at the second end, and when at least one refractive module is rotated to the second preset position, the first center of the first refractive module is parallel to the third connection line at the first end of the first refractive module; the first image source sub-region and the second image source sub-region are configured to provide display light to the display pixels located between the second connection line LI2 and the third connection line through frame synchronization technology.

[0060] Specifically, as mentioned above, because the radius of the first circle CI1 is larger than the radius of the second circle CI2, the angles of the display light provided by the refractive modules on both sides overlap with the angles of the display light provided by the refractive module in the middle. When the provided light angles are the same, if the displayed content is inconsistent, it will cause a ghosting problem. For example... Figure 6 As shown, assuming the refractive module is currently in the first preset position, the position of the second connecting line LI2 is as shown in the figure. After the refractive module rotates to the second preset position, the third connecting line LI3 is defined as the third dashed line LI3'. The third dashed line LI3' is parallel to the second connecting line LI2. It should be noted that... Figure 6 The image after the refractive module is rotated to the second preset position is not shown.

[0061] The third dashed line LI3' and the second connecting line LI2 do not coincide; there is a certain gap between them. When the refractive module is in the first preset position, a portion of the second refractive module 12B lies within the gap between the third dashed line LI3' and the second connecting line LI2; this portion is defined as the first part. When the refractive module is in the second preset position, a portion of the first refractive module 12A lies within the gap between the third dashed line LI3' and the second connecting line LI2; this portion is defined as the second part. The first part in the first preset position and the second part in the second preset position provide display light at the same angle. A smooth transition is achieved through frame synchronization technology, thereby ensuring that the imaging display areas of the three refractive modules can be stitched together. Figure 6 The full width of the displayed image is ensured to create a continuous light field without image breaks during rotation. Frame synchronization technology can control the display of one of the first and second areas, or control the first and second areas to display the same content, etc.

[0062] Similarly, when at least one refractive module is in the first preset position, the first line LI1, where the center of the first circle corresponding to the second refractive module points to the first end of the second refractive module, is parallel to the fourth line, where the center of the first circle corresponding to the third refractive module points to the second end of the third refractive module when at least one refractive module is rotated to the second preset position. The first image source sub-region and the third image source sub-region are configured to provide display light to the display pixels located between the first and fourth lines through frame synchronization.

[0063] Specifically, due to the symmetry of the refractive module, when the fourth line LI4 rotates to the position of the fourth dashed line LI4', light rays at the same angle also exist. The fourth dashed line LI4' is parallel to the first line LI1, so for the display pixels in this area, a smooth transition is also achieved through frame synchronization technology.

[0064] Understandably, once the light field display system is fixed, the display pixels between the fourth dashed line LI4' and the first connecting line LI1 can be determined; the display pixels between the third dashed line LI3' and the second connecting line LI2 can also be determined. When the rotation speed of the support structure 2 is known, the time difference between rotating to the first preset position and rotating to the second preset position can also be determined. Therefore, frame synchronization can be achieved by controlling the displayed content.

[0065] Optionally, Figure 8 This is a schematic diagram of another light field display system provided in an embodiment of the present invention. Figure 9 This is a top view of a light field display system provided in an embodiment of the present invention. (Reference) Figure 8 and Figure 9At least one display device includes at least two display device groups distributed along the rotation direction, each display device group including at least one display device arranged along a first direction; the support structure includes at least two lamp posts 21 corresponding one-to-one with the at least two display device groups; the display device groups are fixed to the lamp posts 21. This embodiment takes three display device groups as an example.

[0066] Specifically, in this embodiment, the projection module, reflector, and refractive module are fixed to the lamp post 21. By setting multiple lamp posts in the rotation direction of the support structure, that is, in the circumferential direction, the refresh rate of the displayed image can be increased, and the display brightness can also be increased.

[0067] Optionally, in some embodiments, a light-blocking structure is provided on at least one side of the display device assembly along the rotation direction; the light-blocking structure is fixed to the lamp post. For example, light-blocking structures can be provided on both sides of the display device assembly. The light-blocking structure is opaque, and the light-blocking structure can be provided on the lamp post to avoid optical path interference between different display devices.

[0068] Optionally, in some embodiments, at least two display device groups are evenly distributed along the rotation direction. That is, the included angle between any two display device groups is the same. A viewpoint can see the display content of different display device groups at a fixed display interval, thereby improving the display effect. In this embodiment, each lamp post can handle a horizontal viewing angle of about 120 degrees, and the combination of three lamp posts can achieve a 360-degree full surround display.

[0069] Optionally, a cavity is reserved in the center of the support structure 2 to facilitate future maintenance.

[0070] Optionally, the support structure 2 can be an integrated frame formed by 3D printing or injection molding, with precise positioning slots on the frame to ensure the installation accuracy of the display device. Furthermore, the light field display system can also have a PPC bracket installed outside the support structure 2 to enhance stability during rotation.

[0071] Optionally, in some embodiments, the opening angle of the refracting module to the incident beam in the first direction can be greater than 70 degrees, while the opening angle to the incident beam in the horizontal direction has little effect, such as about 2 degrees.

[0072] Optionally, in some embodiments, multiple display devices can be installed on the same lamp post in the first direction, thereby increasing the vertical display height. The vertical display height is extended through image stitching. Furthermore, multi-color display devices can be installed vertically to achieve color display.

[0073] Optionally, in some embodiments, the light field display system further includes a tracking module for tracking the viewpoint position; the projection module is configured to calibrate the display data corresponding to each image source sub-region based on the viewpoint position.

[0074] Specifically, the tracking module is, for example, an eye-tracking system used to track the position of the human eye. As mentioned earlier, to simplify the model, the imaging surfaces corresponding to the three refractive modules are understood as a single plane. However, in reality, there is a certain interval between the three imaging surfaces, that is, a certain distance between them. By tracking the viewpoint position in real time through the tracking system, the position of each imaging surface can be obtained promptly. Then, by calibrating the display data, the consistency of the displayed image can be achieved, ensuring that the content displayed on each imaging surface as seen from the viewpoint does not differ due to variations in the distance between the imaging surface and the viewpoint.

[0075] In another advantageous embodiment of the invention, the display device includes at least two refractive modules; the first centers corresponding to different refractive modules are disposed on the same cylindrical surface. In this embodiment, the first centers corresponding to all refractive modules in the display device can be located on the same cylindrical surface.

[0076] In detail, to further reduce the complexity and manufacturing cost of the light field display system while meeting the requirements for a large field of view, the tracking module can be omitted. In this case, by optimizing the design of the radii of curvature of multiple arc-shaped refractive modules (e.g., the first refractive module 12A, the second refractive module 12B, and the third refractive module 12C) and their relative positions on the cylindrical surface, the first centers of the different refractive modules are substantially located on the same cylindrical surface. This design is called "shared-circle imaging surface". Through the "shared-circle imaging surface" design, when the support structure 2 rotates, the images from different refractive modules can be spatially and self-consistently stitched together. When viewed by the human eye at different angles, since the imaging surfaces of all display pixels are on the same cylindrical surface, the consistency of the image can be guaranteed without relying on a complex real-time tracking and image calibration system. This avoids visual jumps or blurring caused by misalignment of the imaging surfaces, significantly reducing the system cost and engineering implementation difficulty. It is understandable that minor co-circle errors are permissible in practical applications. The human eye has a high tolerance for "approximately coplanar" imaging surfaces, which can effectively mask minor gaps in the film splicing caused by insufficient processing or assembly precision. It should be noted that when the light field display system includes a tracking module, the first center of different refractive modules can also be configured to lie on the same cylindrical surface.

[0077] In other embodiments, the number of refractive modules can be two or other numbers. When there are two refractive modules, a reflector can be provided for one of them. The projected image source area is divided into two image source sub-areas. The output beam of the corresponding projection module is divided into two parts. One part is directly incident on the refractive module, and this part is called the direct output beam. The other part is incident on another refractive module after passing through the reflector, and this part is called the mirror beam. The angle of the reflector is adjusted so that the edge of the mirror beam after being deflected by the refractive module is equal to or slightly smaller than the diameter of the tangent circle of the edge of the beam directly incident on the refractive module. This ensures that during rotational scanning display, the display area of ​​the directly output beam can be connected to or slightly overlap with the display area of ​​the mirror beam, so that there are no gaps in the display. At the same time, the edge of the mirror beam is as tangent as possible to the mounting circle of the refractive module or the angle is very small to ensure a large horizontal viewing angle during display. When the display device includes two refractive modules, a mirror display device can be provided for each display device. The axis of symmetry of the display device and the mirror display device intersects the central axis L1, and the refractive module corresponding to the directly emitted beam is away from the other refractive module.

[0078] Optionally, Figure 10 This is a schematic diagram illustrating a structure in which multiple display devices are arranged in a first direction, according to an embodiment of the present invention. (Reference) Figure 10 The projection module 11 includes a projection lens 112 and a display chip 111; the light-emitting surface of the display chip 111, the principal lens plane of the projection lens 112, and the imaging surface satisfy Scherm's law.

[0079] Specifically, the imaging surface of the display device can be understood as a plane along the first direction that is tangent to the refractive module. When there are three refractive modules, the imaging surface is tangent to the second refractive module. The light-emitting surface of the display chip 111, the principal lens plane of the projection lens 112, and the imaging surface satisfy Scherm's law, that is, the light-emitting surface of the display chip 111, the principal lens plane of the projection lens 112, and the imaging surface intersect on a straight line. At this time, sharp imaging can be achieved on the imaging surface, ensuring the brightness of the image.

[0080] Optionally, such as Figure 10 As shown, the support structure includes a lamp post extending along a first direction, and the light field display system includes a plurality of display devices disposed on the lamp post and arranged along the first direction. The projection module of the display device located at the edge of the lamp post is tilted towards the side of the refractive module at the end away from the center of the lamp post, and the tilt angle is positively correlated with the distance between the center of the display device and the center of the lamp post.

[0081] Specifically, by setting up multiple display devices in the first direction, the images in that direction can be stitched together, that is, the images in the vertical direction can be stitched together. The outer projection modules are tilted towards the center, so that the emitted beams are also tilted towards the center. With this arrangement, the emitted beams of each projection module have a common coverage area, and the common coverage area is also relatively large. When one is in the area covered by the emitted beams of all projection modules, one can view the content projected by all projection modules, that is, one can view the complete display image.

[0082] In this embodiment, by splicing multiple projection modules in the first direction, the light-emitting surface of the display chip 111, the lens principal plane of the projection lens 112, and the imaging surface satisfying Scherm's law, and further combined with the refractive module having a small beam expansion angle in the vertical direction, a clear stereoscopic display with high brightness and a large viewing area can be achieved.

[0083] It should be noted that the area covered by the emitted beam can be preset. Once this area is determined, the position of each refractive module can be accurately calculated, and the position of each display chip and projection lens can be further calculated, so that each display device satisfies Schahm's law. While ensuring a large viewing range and display brightness in the vertical direction, a clear and sharp image can be obtained from near to far, avoiding defocus blur.

[0084] Optionally, Figure 11 This is a schematic diagram of a light pole provided in an embodiment of the present invention, with reference to... Figure 11 The edge of the lamp post is tilted towards one side of the light-reflecting module.

[0085] Specifically, the lamp post can be divided into three sub-lamp posts, such as the first sub-lamp post 211, the second sub-lamp post 212, and the third sub-lamp post 213. The extension direction of each sub-lamp post is parallel to the imaging surface of the display device mounted on it. By setting the edge of the lamp post to slope inwards, the emitted light beams from the display devices at the edge of the lamp post also slope inwards. This results in a large common coverage area not only in the vertical direction but also in the light emission direction of the display devices. In other words, a high-brightness and large-format clear image can be viewed whether viewed up close or from a distance.

[0086] Optionally, Figure 12 This is a schematic diagram of another light field display system provided in an embodiment of the present invention, with reference to... Figure 12 The lamp post 21 extends in a direction parallel to the central axis L1; when the supporting structure rotates, the first end of the lamp post 21 moves on the first trajectory circle 2C1; the second end of the lamp post 21 moves on the second trajectory circle 2C2. Each lamp post 21 is provided with a corresponding first wide-viewing-angle module.

[0087] The first extended viewing angle module includes a first auxiliary light pole 231, multiple vector pixels disposed on the first auxiliary light pole 231, and a third reflector 232; the first end of the first auxiliary light pole 231 is offset from the first end of the light pole 21; and when the support structure rotates, the first end of the first auxiliary light pole 231 moves on the first trajectory circle 2C1; the second end of the first auxiliary light pole 231 is located between the plane where the first trajectory circle 2C1 is located and the plane where the second trajectory circle 2C2 is located; the orthographic projection of the first auxiliary light pole 231 on the plane where the first trajectory circle 2C1 is located is located radially on the first trajectory circle 2C1; and the angle between the first auxiliary light pole 231 and the plane where the first trajectory circle 2C1 is located is greater than 0 degrees and less than 90 degrees, and this angle can be 45 degrees, 60 degrees, etc.; the third reflector 232 is located on the plane where the first trajectory circle 2C1 is located, and the third reflector 232 faces the first auxiliary light pole 231.

[0088] Specifically, the light pole 21 can be straight. By setting the first widening-view module, it can be equivalent to splicing the first auxiliary light pole 231 and the light pole 21 into a single light pole, with the edge of this single light pole tilted towards one side of the refractive module. It should be noted that the first auxiliary light pole 231 and the light pole 21 are offset, not in the same position, to avoid the first auxiliary light pole 231 blocking the light emitted by the vector pixels on the light pole 21. For example... Figure 12 As shown, through the reflection of the third reflector 232, the first auxiliary lamp post 231 is equivalent to the first auxiliary mirror lamp post 233. When the supporting structure rotates, the first auxiliary mirror lamp post 233 and the lamp post 21 rotate to the position where their two first ends coincide at different times. Due to the persistence of vision in the human eye, this is equivalent to... Figure 11 The lamp post structure is shown. In other words, the vertical viewing angle can be expanded by setting up the first widening-view module. Simultaneously, since the first auxiliary lamp post 231 is located between the planes containing the first and second trajectory circles, the vertical dimensions of the light field display system can be reduced.

[0089] In some embodiments, optionally, each lamp post 21 is provided with a corresponding second wide-viewing-angle module. The second wide-viewing-angle module includes a second auxiliary lamp post 241, a plurality of vector pixels disposed on the second auxiliary lamp post 241, and a fourth reflector 242; the first end of the second auxiliary lamp post 241 is offset from the second end of the lamp post 21; and when the support structure rotates, the first end of the second auxiliary lamp post 241 moves on the second trajectory circle 2C2; the second end of the second auxiliary lamp post 241 is located between the plane of the first trajectory circle 2C1 and the plane of the second trajectory circle 2C2; the orthographic projection of the second auxiliary lamp post 241 on the plane of the second trajectory circle 2C2 is located radially on the second trajectory circle 2C2; and the angle between the second auxiliary lamp post 241 and the plane of the second trajectory circle 2C2 is greater than 0 degrees and less than 90 degrees, which can be 45 degrees, 60 degrees, etc.; the fourth reflector 242 is located on the plane of the second trajectory circle 2C2, and the fourth reflector 242 faces the second auxiliary lamp post 241.

[0090] Specifically, the light pole 21 can be straight. By setting a second widening-view module, it can be equivalent to splicing the second auxiliary light pole 241 and the light pole 21 into a single light pole, with the edge of this single light pole tilted towards one side of the refractive module. It should be noted that the second auxiliary light pole 241 and the light pole 21 are offset, not in the same position, to prevent the second auxiliary light pole 241 from blocking the light emitted by the vector pixels on the light pole 21. For example... Figure 12 As shown, through the reflection of the fourth reflector 242, the second auxiliary lamp post 241 is equivalent to the second auxiliary mirror lamp post 243. When the supporting structure rotates, the second auxiliary mirror lamp post 243 and the lamp post 21 rotate to the position where their two first ends coincide at different times. Due to the persistence of vision in the human eye, this is equivalent to... Figure 11 The lamp post structure is shown. In other words, the vertical viewing angle can be expanded by setting a second widening module. Simultaneously, since the second auxiliary lamp post 241 is located between the planes containing the first and second trajectory circles, the vertical dimensions of the light field display system can be reduced.

[0091] Optionally, Figure 13 This is a schematic diagram of another light field display system provided in an embodiment of the present invention, with reference to... Figure 13 The light field display system also includes a prism film 115, which is set corresponding to the lamp post 21. The prism film 115 is used to deflect the emitted light from the projection module 11 located at the edge of the lamp post 21 towards the center of the lamp post by a preset angle.

[0092] Specifically, since the viewing angle of a single projection module is limited, the emitted light from the projection module 11 located at the edge of the lamp post 21 can be tilted inwards, thereby increasing the area covered by the beams emitted from projection modules 11 at different locations and thus expanding the vertical viewing angle. The prism film 115 deflects the emitted light from projection modules closer to the edge at a larger angle. It should be noted that the preset angle needs to be smaller than the minimum angle between the emitted light from the projection module and the lamp post. Furthermore, with the prism film 115 in place, the angle between the emitted light from the projection module 11 and the third or fourth reflecting mirror becomes larger, increasing the distance between the reflected light and the vertical viewing area, thus avoiding interference with the viewing area.

[0093] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0094] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A light field display system, characterized in that, The light field display system includes at least one display device and a support structure. The display device includes a projection module and at least one refractive module. The support structure is capable of rotating about its own central axis; The display device is fixed to the support structure; Along the rotation direction of the support structure, the projection image source area of ​​the projection module includes at least one image source sub-area corresponding to the at least one refractive module; The refractive module is located on the imaging surface of the image source sub-region; The refractive module is arc-shaped, and the first center of the refractive module is located on the side of the refractive module away from the central axis; the refractive module is configured to deflect the emitted light beam from the image source sub-region toward the first center, and the divergence angle of the emitted light beam from the refractive module in the rotation direction is greater than the divergence angle of the emitted light beam from the image source sub-region.

2. The light field display system according to claim 1, characterized in that, The refractive module includes a refractive film and an optical film, with the refractive film located between the optical film and the projection module; The center of both the refractive film and the optical film is the first center; The refractive film is used to deflect the emitted light beam from the image source region toward the first center; the optical film is used to expand the incident light beam along a first direction; the first direction is parallel to the central axis.

3. The light field display system according to claim 1, characterized in that, The number of the at least one refractive module is one; the number of the image source sub-regions is one; The refractive module is used to deflect the emitted light beam from the projected image source area toward the first center.

4. The light field display system according to claim 1, characterized in that, The number of the at least one refractive module is three; the number of the at least one image source sub-region is three, and the size of each image source sub-region is the same along the rotation direction; the at least one refractive module includes a first refractive module, a second refractive module, and a third refractive module; along the rotation direction, the first refractive module and the third refractive module are respectively located on both sides of the second refractive module; the at least one image source sub-region includes a first image source sub-region corresponding to the first refractive module, a second image source sub-region corresponding to the second refractive module, and a third image source sub-region corresponding to the third refractive module; The light field display system also includes a first reflector and a second reflector; The first reflector is used to deflect the emitted light beam from the first image source sub-region toward a side away from the second refractive module; The first refractive module is located in the light-emitting path of the first reflector; The second reflector is used to deflect the emitted light beam from the third image source sub-region toward a side away from the second refractive module; The third refractive module is located in the light-emitting path of the second reflector; The light beam emitted from the second image source region is directly incident on the second refractive module.

5. The light field display system according to claim 4, characterized in that, Along the rotation direction, the first refractive module, the second refractive module, and the third refractive module are arranged sequentially; each refractive module includes a first end and a second end arranged in the rotation direction. The radius of the first circle, whose center is located on the central axis and which is tangent to both the line connecting the first circle corresponding to the second refractive module to the first end of the second refractive module and the line connecting the first circle to the second end, is greater than the radius of the second circle. The center of the second circle is located on the central axis; and the line connecting the second circle to the first end of the first refractive module corresponding to the first refractive module, and the line connecting the first center of the third refractive module corresponding to the second end of the third refractive module, are all tangent.

6. The light field display system according to claim 5, characterized in that, When the at least one refractive module is in the first preset position, the first center of the second refractive module points to the second line connecting the second end of the second refractive module. When the at least one refractive module is rotated to the second preset position, the first center of the first refractive module is parallel to the third line connecting the first end of the first refractive module. The first image source sub-region and the second image source sub-region are configured to provide display light to the display pixels located between the second and third connecting lines through frame synchronization; When the at least one refractive module is in the first preset position, the first line connecting the first center of the second refractive module to the first end of the second refractive module is parallel to the fourth line connecting the first center of the third refractive module to the second end of the third refractive module when the at least one refractive module is rotated to the second preset position. The first image source sub-region and the third image source sub-region are configured to provide display light to the display pixels located between the first and fourth connecting lines via frame synchronization.

7. The light field display system according to claim 4, characterized in that, The light field display system also includes a tracking module, which is used to track the viewpoint position; The projection module is configured to calibrate the display data corresponding to each of the image source sub-regions according to the viewpoint position.

8. The light field display system according to claim 1, characterized in that, The display device includes at least two of the refractive modules; the first centers corresponding to different refractive modules are arranged on the same cylindrical surface.

9. The light field display system according to claim 1, characterized in that, The at least one display device includes at least two display device groups distributed along the rotation direction, each display device group including at least one display device arranged along a first direction; the support structure includes at least two lamp posts corresponding one-to-one with the at least two display device groups, the display device groups being fixed to the lamp posts; the first direction is parallel to the central axis.

10. The light field display system according to claim 9, characterized in that, Along the rotation direction, at least one side of the display device assembly is provided with a light-blocking structure; the light-blocking structure is fixed to the lamp post.

11. The light field display system according to claim 9, characterized in that, At least two of the display device groups are evenly distributed along the rotation direction.

12. The light field display system according to claim 1, characterized in that, The projection module includes a projection lens and a display chip; the light-emitting surface of the display chip, the principal plane of the projection lens, and the imaging surface satisfy Scherm's law.

13. The light field display system according to claim 12, characterized in that, The supporting structure includes a lamp post extending along a first direction, and the light field display system includes a plurality of display devices disposed on the lamp post and arranged along the first direction; the projection module of the display device located at the edge of the lamp post is tilted towards the side of the refractive module at one end away from the center of the lamp post, and the tilt angle is positively correlated with the distance between the center of the display device and the center of the lamp post.

14. The light field display system according to claim 13, characterized in that, The edge of the lamp post is tilted toward one side of the refractive module.

15. The light field display system according to claim 13, characterized in that, The lamp post extends in a direction parallel to the central axis; when the support structure rotates, the first end of the lamp post moves on the first trajectory circle, and the second end of the lamp post moves on the second trajectory circle; The light field display system further includes a first extended viewing angle module, which includes a first auxiliary lamp post, a plurality of vector pixels disposed on the first auxiliary lamp post, and a third reflector; the first end of the first auxiliary lamp post is offset from the first end of the lamp post; and when the support structure rotates, the first end of the first auxiliary lamp post moves on the first trajectory circle; the second end of the first auxiliary lamp post is located between the plane containing the first trajectory circle and the plane containing the second trajectory circle; the orthographic projection of the first auxiliary lamp post on the plane containing the first trajectory circle is located radially on the first trajectory circle; and the angle between the first auxiliary lamp post and the plane containing the first trajectory circle is greater than 0 degrees and less than 90 degrees; the third reflector is located on the plane containing the first trajectory circle and faces the first auxiliary lamp post; And / or, the light field display system further includes a second extended viewing angle module, the second extended viewing angle module including a second auxiliary lamp post, a plurality of vector pixels disposed on the second auxiliary lamp post, and a fourth reflector; the first end of the second auxiliary lamp post is offset from the second end of the lamp post; and when the support structure rotates, the first end of the second auxiliary lamp post moves on the second trajectory circle; the second end of the second auxiliary lamp post is located between the plane containing the first trajectory circle and the plane containing the second trajectory circle; the orthographic projection of the second auxiliary lamp post on the plane containing the second trajectory circle is located radially on the second trajectory circle; and the angle between the second auxiliary lamp post and the plane containing the second trajectory circle is greater than 0 degrees and less than 90 degrees; the fourth reflector is located on the plane containing the second trajectory circle, and the fourth reflector faces the second auxiliary lamp post.

16. The light field display system according to claim 15, characterized in that, The light field display system also includes a prism film, which is set corresponding to the lamp post; the prism film is used to deflect the light emitted by the projection module located at the edge of the lamp post towards the center of the lamp post by a preset angle.

Images