Display system

Abstract

The embodiment of the utility model discloses a display system, and the system comprises an optical fiber scanning array which comprises a plurality of optical fiber scanning units, the optical fiber scanning units are densely arranged in the transverse direction of the optical fiber scanning array, and the number of the optical fiber scanning units arranged in the transverse direction is far greater than the number of the optical fiber scanning units arranged in the longitudinal direction; the directional scattering screen is configured to perform directional scattering in the longitudinal direction; light emitted by the optical fiber scanning array forms a display space range for imaging on the other side of the directional scattering screen through the directional scattering effect of the directional scattering screen.

Description

Technical Field

[0001] This application relates to the field of display technology, and more specifically to a display system. Background Technology

[0002] Three-dimensional (3D) stereoscopic display technology (also known as 3D display or 3D technology) can bring viewers an immersive viewing experience.

[0003] Currently, common 3D displays require specific equipment (such as 3D glasses), but their application range and portability are relatively limited, and their comfort is poor. In particular, wearing 3D glasses for a long time can cause viewers to experience dizziness, eye fatigue, and other discomfort.

[0004] In addition, the industry is also exploring naked-eye 3D technology, but the current naked-eye 3D technology still has many shortcomings in terms of depth of field and viewing distance. Utility Model Content

[0005] Based on the above, this application provides a display system to solve the problems existing in the current naked-eye 3D technology.

[0006] Based on one aspect of this application, embodiments of this application provide a display system, including:

[0007] A fiber optic scanning array includes multiple fiber optic scanning units, which are densely arranged in the horizontal direction of the fiber optic scanning array. The number of fiber optic scanning units arranged in the horizontal direction is much greater than the number of fiber optic scanning units arranged in the vertical direction.

[0008] A directional scattering screen is configured to perform directional scattering in the longitudinal direction;

[0009] The fiber optic scanning array is located on one side of the directional scattering screen. The light emitted from the fiber optic scanning array is directionally scattered by the directional scattering screen, forming a display space range for imaging on the other side of the directional scattering screen.

[0010] Optionally, the fiber scanning units in the fiber scanning array are configured into multiple scanning unit groups, and any scanning unit group contains at least one fiber scanning unit;

[0011] The number of fiber optic scanning units included in the scanning unit group is positively correlated with the range of the formed display space.

[0012] Optionally, the scanning unit group includes a column of aligned fiber optic scanning units.

[0013] Optionally, the scanning unit group includes two columns of fiber optic scanning units arranged in a staggered manner in the longitudinal direction.

[0014] Optionally, the exit pupil positions of each fiber scanning unit in each scanning unit group coincide in the longitudinal projection position, or the deviation of the longitudinal projection position is within a set range.

[0015] Optionally, for any two adjacent scanning unit groups, the angle difference between the exit pupil positions of two adjacent fiber scanning units at the same longitudinal position and the display center is no greater than 0.1 degrees.

[0016] Optionally, the divergence angle of the light emitted by the fiber optic scanning unit in the lateral direction is no greater than 0.1 degrees.

[0017] Optionally, the directional scattering screen has a vertical structure in the longitudinal direction.

[0018] Optionally, the directional scattering screen has a longitudinal arc-shaped structure.

[0019] Optionally, the display system further includes an interaction module for acquiring interaction commands from the viewer; and a processing control module for controlling the operation of the fiber optic scanning array and the interaction module.

[0020] Other features and advantages of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the technical solutions of this application. The objectives and other advantages of this application may be realized and obtained by means of the structures and / or processes particularly pointed out in the description, claims and drawings. Attached Figure Description

[0021] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of a display system 10 provided in an embodiment of this application;

[0023] Figure 2 This is a schematic diagram of the specific structure of the fiber optic scanning unit provided in the embodiments of this application;

[0024] Figure 3 This is a schematic diagram of the display system 10 provided in the embodiments of this application from a top-down perspective;

[0025] Figure 4 This is a schematic diagram of the pixel construction misalignment amount provided in the embodiments of this application;

[0026] Figure 5 This is a schematic diagram of pixel construction misalignment distribution provided in an embodiment of this application;

[0027] Figure 6This is a schematic diagram of the perspective relationship between the display area and the directional scattering screen provided in an embodiment of this application;

[0028] Figure 7 This is a schematic diagram of the viewing area provided in the embodiments of this application;

[0029] Figure 8a This is a schematic diagram showing the relationship between the objective lens exit pupil size and the object distance and image distance;

[0030] Figure 8b This is a schematic diagram showing the relationship between the objective lens exit pupil size and the lens object-side numerical aperture;

[0031] Figure 9a This is a schematic diagram of the arrangement of the scanning unit group 100A provided in the embodiments of this application;

[0032] Figure 9b yes Figure 9a A schematic diagram of the projected image formed by the scanning unit group 100A in the middle;

[0033] Figure 10 This is a schematic diagram of the perspective relationship between the directional scattering screen 240 and its corresponding display area provided in the embodiments of this application;

[0034] Figure 11a This is a schematic diagram of the arrangement of the scanning unit group 300A provided in the embodiments of this application;

[0035] Figure 11b This is a schematic diagram showing the arrangement of the fiber optic scanning units 310 in the scanning unit group 300A provided in this application embodiment;

[0036] Figure 12 yes Figure 11b A schematic diagram showing the lateral angular relationship between the two staggered fiber scanning units 310 in the middle;

[0037] Figure 13 This is a schematic diagram of the structure of a display system 50 provided in an embodiment of this application. Detailed Implementation

[0038] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0039] It should be noted that the accompanying drawings of this application show an xyz coordinate system. For ease of description, in the embodiments of this application, the direction parallel to the y-axis can also be called: longitudinal direction or first direction; the direction parallel to the x-axis can also be called: transverse direction or second direction; the direction perpendicular to the xy plane can be considered as the z-axis direction; and the direction parallel to the z-axis can also be called: depth direction or third direction. This coordinate system is used in all views or embodiments of this application, and consistency is maintained in all embodiments. The descriptions of the corresponding direction names are also applicable throughout the entire application.

[0040] refer to Figure 1 A display system 10 provided in this application embodiment includes: a fiber optic scanning array 100 and a directional scattering screen 140. The fiber optic scanning array 100 includes a plurality of densely arranged fiber optic scanning units 110. The fiber optic scanning units 110 are densely arranged in the transverse direction of the fiber optic scanning array 100. The directional scattering screen 140 corresponds to the transverse arrangement of the fiber optic scanning array 100, and the fiber optic scanning array 100 is located outside the directional scattering screen 140 (i.e., on the side of the directional scattering screen 140 away from the display center). The directional scattering screen 140 is configured to perform directional scattering in the longitudinal direction.

[0041] exist Figure 1 In the display system 10 shown, the fiber optic scanning array 100 is arranged in an arc shape. However, it should be understood that this arrangement is exemplary, and in actual applications, the fiber optic scanning array 100 may also adopt other arrangements, such as a smooth curved arrangement. Correspondingly, the structural form of the directional scattering screen 140 is not limited to... Figure 1 The shape shown is arc-shaped in the horizontal direction, which will correspond to the specific arrangement of the fiber scanning array 100.

[0042] In some embodiments, the structural arrangement of the fiber scanning array 100 and the directional scattering screen 140 corresponds to each other, thereby ensuring that the light emitted from the fiber scanning array 100 acts fully and accurately on the directional scattering screen 140 to provide a naked-eye 3D image display to the viewer. In other embodiments, considering that the viewing distance is sometimes close during actual viewing, the longitudinal width of the image on the directional scattering screen 140 is relatively large, which places a large requirement on the longitudinal projection field of view of the fiber scanning unit 110. Therefore, a method such as... Figure 6 The structural form shown is that the directional scattering screen 140 has an arc shape in the longitudinal direction, which can reduce the longitudinal projection area. This will be explained in detail later.

[0043] It should be noted that, in this embodiment, for the fiber scanning array 100, the arrangement of the fiber scanning units 110 is mainly determined by their size and the divergence angle of the light, and their lateral arrangement morphology adopts... Figure 1The arc shape shown is designed to achieve a large viewing angle, and the angle between adjacent fiber scanning units 110 relative to the center of the circle is related to the divergence angle of the light.

[0044] In this embodiment, the lateral dimensions of the fiber optic scanning array 100 and the directional scattering screen 140 are larger than their respective longitudinal dimensions. Furthermore, in this embodiment, for the fiber optic scanning array 100, the number of fiber optic scanning units 110 arranged laterally is much greater than the number of fiber optic scanning units 110 arranged longitudinally. This is primarily considering the binocular parallax characteristics of the viewer; the densely arranged fiber optic scanning units 110 laterally are used to fully construct the beam across the entire field of view, allowing the viewer to receive a sufficient field of view (lateral).

[0045] The light output from each fiber scanning unit 110 in the fiber scanning array 100 passes through the directional scattering screen 140 to form a display area 15. This display area 15 is located inside the directional scattering screen 140 (i.e., on the side of the directional scattering screen 140 closer to the display center). Figure 1 As shown, the display area 15 is the display space located inside the directional scattering screen 140. The display area 15 is used for imaging; that is, the viewer can see the 3D image presented by the display system 10 through the display area 15. In the embodiments of this application, the display center can be considered as the longitudinal region corresponding to the center of the display area 15 (i.e., not a center point, but a central axis).

[0046] Generally, the display system 10 in this application is fixedly installed on a flat surface (such as the ground, a base platform, etc.). In this case, the horizontal direction of the display system 10 corresponds to the horizontal direction, and the vertical direction corresponds to the vertical direction. Of course, this is not intended to limit the solution of this application. It should be noted that... Figure 1 The image shown is merely an example, and the dimensions, proportions, and distances between the fiber optic scanning array 100, the directional scattering screen 140, and the display area 15 are not limited to these specifications. Figure 1 As shown in the image.

[0047] refer to Figure 2 In this embodiment, the exemplary fiber optic scanning unit 110 includes: a processing module 111, a scanning device 112, a light source module 113, an optical fiber 114, a light source modulation module 115, and a scanning drive module 116.

[0048] The processing module 111 may be a graphics processing unit (GPU), a central processing unit (CPU), or other chips, circuits, or combinations thereof with control and image processing functions, without specific limitations.

[0049] During operation, the processing module 111 controls the light source modulation module 115 to modulate the light source module 113 according to the image data to be displayed. The light source module 113 contains multiple monochromatic lasers, each emitting a beam of different colors. Figure 2 As can be seen, the laser array can specifically use red (R), green (G), and blue (B) lasers. The light emitted by each laser in the light source module 113 is combined into a single laser beam after beam combining and coupled into the optical fiber 114.

[0050] The processing module 111 can also control the scanning drive module 116 to drive the scanning device 112 to perform scanning, thereby scanning and outputting the image beam transmitted in the optical fiber 114.

[0051] The light emitted by the scanning device 112 acts on a pixel on the surface of the medium, forming a light spot at that pixel. During the actual scanning process, the light emitted by the fiber optic cable 114 follows a pre-defined scanning trajectory (e.g., a raster-style scanning trajectory), forming a light spot with corresponding image information (e.g., color, grayscale, or brightness) at each pixel. Within one frame, the light traverses each pixel at a sufficiently fast speed to complete the scanning of one frame. Due to the "visual persistence" characteristic of human vision, the human eye cannot perceive the movement of the light beam at each pixel, but instead sees a complete image.

[0052] Figure 2 The diagram also shows the specific structure of the scanning device 112, including: an actuator 121, a fiber optic cantilever 122, a mirror assembly 123, a package 124, and a fixture 125. The rear end of the actuator 121 (i.e., Figure 2 End A shown is fixed to the housing 124 by a fastener 125. The actuator 121 has a channel along the length axis (not shown in the figure). Figure 2 As shown in the diagram, optical fiber 114 passes through this channel and is located at the front end of actuator 121 (i.e., Figure 2 The fiber cantilever 122 is formed by extending from end B (as shown in the diagram). During operation, the actuator 121 can vibrate in the first and second directions under the drive of the scanning drive signal. Driven by the actuator 121, the front end of the fiber cantilever 122 performs two-dimensional scanning along a preset scanning trajectory and emits light. The emitted light can then pass through the mirror group 123 to achieve scanning imaging.

[0053] It should be understood that Figure 2 The structure and components of the fiber optic scanning unit 110 shown are exemplary and may vary in actual applications. For example, the actuator 121 may not be a cylindrical structure but a sheet-like structure; the optical fiber 114 may not penetrate the actuator 121 but be attached to its surface; the light source modulation module 115 and the scanning drive module 116 may both be integrated into the processing module 111, etc. In other words, Figure 2 The content shown should not be construed as a limitation on the proposed solution.

[0054] For the aforementioned display system 10, in order to provide a better 3D display effect, achieve a greater display depth, and a larger display area, it is necessary to further configure the relevant parameters of the display system, such as: the lateral spacing distance of the fiber optic scanning units 110, the divergence angle of the light output by the fiber optic scanning units 110, the spot size on the directional scattering screen 140, etc. To clarify the beneficial effects achieved by the solution of this application, the imaging principle of the display system of this application needs to be explained in detail:

[0055] To achieve a near-realistic 3D display effect, it is necessary to simulate the light propagation direction of each virtual point to construct the light rays of a three-dimensional virtual object. The refinement and realism of the three-dimensional virtual object are directly affected by the accuracy of the light ray construction, which in turn depends on the light output from the fiber scanning unit 110 in the fiber scanning array 100. Ideally, each constructed light ray is thin and collimated, but due to diffraction and the size of the object source pixels, each light ray has a certain divergence angle θ. The divergence angle θ is affected by various factors such as the lens exit pupil size d, object distance l, image distance l', light source wavelength λ, and object pixel size p, which can be specifically expressed as:

[0056]

[0057] In this embodiment of the application, the divergence angle θ of the light emitted by the fiber scanning unit 110 in the fiber scanning array 100 is ≤0.1 degrees.

[0058] When a viewer uses the display system 10, the focus of the human eye will be on the directional scattering screen 140. The size of the light spot formed by the light projected onto the directional scattering screen 140 will affect the resolution of the three-dimensional virtual scene viewed by the viewer. In this embodiment, the size of the light spot (also called the image-side pixel size) p' projected onto the directional scattering screen 140 is mainly determined by the diffraction effect, the object-side pixel size, and the imaging position, and can be specifically expressed as follows:

[0059]

[0060] In addition to the above configuration, the display area 15 is used to present three-dimensional virtual scenery, which also affects the viewing effect. In this embodiment, the display area 15 has a horizontal width (W), a vertical width (H), and a depth (L), wherein:

[0061] Horizontal width: The horizontal width of the display area 15 is mainly related to the horizontal field of view of the fiber optic scanning unit 110. It is related to the projection distance R; please refer to [reference needed] for details. Figure 3 . Figure 3 The display area 15 is shown from a top-down perspective. From this viewpoint, the display area 15 is circular, and its radius W can be expressed as:

[0062]

[0063] Depth: Since the human eye focuses on the directional scattering screen 140 during viewing, and the constructed light rays have a divergence angle θ, the depth should generally not be too large when constructing the light rays. Otherwise, it will cause misalignment of pixels on the directional scattering screen 140, resulting in perceptual misalignment by the human eye. (Reference) Figure 4 The main reason for the perceived misalignment in human vision lies in the fact that the light beam is constructed using the principal ray. Due to the divergence angle θ of the light rays, the human eye receives misaligned positional information at certain viewpoints. For example, in… Figure 4 In the scenario shown, the viewer's eye will perceive the light rays emitted from point Q” on the directional scattering screen 140 as light rays emitted from point Q', thus seeing the spatially imaged point Q. The pixel construction misalignment is δ. p Mainly related to the divergence angle θ of the light rays and the observation distance V z It is related to the display depth L of the pixel. It can be expressed as:

[0064]

[0065] According to formula (4), a smaller divergence angle θ of the light rays is beneficial for the pixel to construct the misalignment amount δ. p To reduce the [unclear meaning], in this embodiment of the application, a display depth of 0-1m and an observation distance of 250mm-1000mm are selected for simulation, and the following results can be obtained: Figure 5 The pixel construction misalignment distribution shown is obtained through testing. When the pixel construction misalignment δ p When the pixel size is smaller than that of a 140-pixel directional scattering screen, it is acceptable to the human eye.

[0066] Vertical width: When a viewer views the screen, their eye focuses on the directional scattering screen 140 and images the content presented on it. The directional scattering screen 140 scatters light in a directional manner along its longitudinal direction. When the human eye constructs a 3D virtual scene, there is a perspective relationship between the 3D virtual scene and the image on the directional scattering screen 140. To reduce the longitudinal projection area, the longitudinal structural shape of the directional scattering screen 140 is as follows... Figure 6 As shown, from Figure 6 As can be seen from this, the relationship between the longitudinal width H of the display area 15 and the longitudinal width h of the imaging on the directional scattering screen 140 can be expressed as:

[0067]

[0068] In the formula, R is the diameter of the arc-shaped structure formed longitudinally by the directional scattering screen 140;

[0069] H c The distance between the two ends of the directional scattering screen 140 in the longitudinal direction;

[0070] In this embodiment, R and H c This can be further expressed as:

[0071]

[0072]

[0073] In this embodiment, to ensure the longitudinal field of view, a scanning unit group can be used in the fiber optic scanning array 100, so that multiple fiber optic scanning units 110 are spliced ​​longitudinally, thereby expanding the longitudinal field of view. Typically, in this embodiment, the scanning unit group can adopt an arrangement of fiber optic scanning units aligned in a single column (e.g., ...). Figure 9a As shown), a staggered arrangement can also be used (in this method, the fiber scanning units will generally form two columns, such as...). Figure 11a (As shown). In this embodiment, the number of fiber optic scanning units included in the scanning unit group is positively correlated with the formed display space range. Furthermore, in this embodiment, for any two adjacent scanning unit groups, the angular difference between two adjacent fiber optic scanning units at the same longitudinal position relative to the display center is no greater than 0.1 degrees. The specific configuration of the scanning unit groups will be described later.

[0074] Based on the above, the display system 10 can be specifically configured as follows in some embodiments of this application:

[0075] In some feasible embodiments of this application, the spacing between the fiber optic scanning units 110 in the lateral direction can be 7.2 mm. In order to determine the spacing between the fiber optic scanning units 110 in the lateral direction, the divergence angle of the light emitted from the fiber optic scanning units 110 will first be determined.

[0076] Specifically, based on display system 10, when a viewer observes a virtual 3D scene, the image is projected onto directional scattering screen 140. To ensure the image is as detailed as possible, the angle subtended by a single pixel on the scattering screen relative to the human eye is approximately 2'. The distance between the human eye and directional scattering screen 140 can range from 0.25 to 1.5m. In some interactive display systems, this distance range also facilitates interaction. Within this distance range, the resolvable pixel size is 600μm. Correspondingly, the single pixel size on directional scattering screen 140 can be 1.8mm, the angular resolution within display area 15 is greater than 20PPD, and the object-side pixel size corresponding to fiber optic scanning unit 110 is 1.5μm. A pixel misalignment δ is also set for directional scattering screen 140. p It should be within five pixels. Therefore, according to the aforementioned formulas (2) and (4), the following relationship can be obtained:

[0077]

[0078]

[0079] according to Figure 5 The simulation results shown indicate that when V z When -L is 250mm and the imaging depth L is at its maximum, the pixel construction misalignment δ p The maximum value is obtained, thus yielding the relation: V z = L + 250 (mm), further, equation ② above can be changed to:

[0080]

[0081] To achieve better interactive effects, the imaging depth L is set to 1m, thus the divergence angle θ is equal to 0.083 degrees.

[0082] Based on the divergence angle θ, the relationships between parameters such as objective exit pupil size, object distance, image distance, and lens object-side numerical aperture (NA) related to the divergence angle θ can be further determined.

[0083] Here, λ is set to 638nm, and the divergence angle θ can be expressed as:

[0084]

[0085] Based on the aforementioned relationship ④ and formula (2), the relationships between the objective lens exit pupil size and the object distance, image distance, and the numerical aperture of the lens on the object side can be obtained respectively. (Refer to...) Figures 8a-8b .

[0086] Due to the small object size, a small lens focal length is required to ensure a large field of view. Furthermore, the object-side numerical aperture must also be considered; for the fiber optic scanning unit 110, this is typically less than 0.24. Figures 8a-8b It can be seen that when the objective lens exit pupil diameter d is 3.74 mm, the required projection object distance is the smallest, and NA is less than 0.24 ( Figure 8b The values ​​corresponding to the yellow dashed lines are shown. Due to the large magnification (e.g., close to 1000x), the object distance is almost equal to the focal length. The calculated focal length of the imaging lens is 7.807mm, and the projection distance is 4.497m.

[0087] Based on the above, the lateral spacing δ between the fiber scanning units 110 can be further determined. 110 Lateral spacing δ 110 It can be represented as:

[0088] 0110=(I′+L / 2)0⑤

[0089] Based on the aforementioned parameter values, the lateral spacing δ of the fiber optic scanning unit 110 110 It is 7.2mm.

[0090] This yielded the arrangement of the directional scattering screen 140 and the fiber optic scanning unit 110, as well as the basic parameters of the objective lens.

[0091] In this embodiment of the application, based on the determination of the lateral spacing of the fiber optic scanning units 110, the field of view parameters of the fiber optic scanning units 110 can be further determined in order to determine the arrangement structure and number of the fiber optic scanning units 110.

[0092] Lateral field of view of fiber optic scanning unit 110 It can be represented as:

[0093]

[0094] Longitudinal field of view of fiber optic scanning unit 110 It can be represented as:

[0095]

[0096] Considering the actual viewing experience, the horizontal width W and vertical width H of the display area 15 are both set to 1000mm, the human eye movement range δv is 500mm, and the human eye observation distance is 1250mm. The horizontal field of view of the fiber optic scanning unit 110 can be calculated using equations ⑥ and ⑦. The longitudinal field of view of the fiber optic scanning unit 110 is 11.48 degrees. It is 27.49 degrees.

[0097] The fiber optic scanning units 110 in the fiber optic scanning array 100 are arranged in groups, that is, the fiber optic scanning array 100 contains multiple groups of scanning units, and each scanning unit group contains multiple fiber optic scanning units 110. In some embodiments, the multiple fiber optic scanning units 110 in each scanning unit group 110 are aligned and arranged in a row. Figure 9a As shown, the arrangement of the scanning unit group 100A is illustrated. Considering that the images projected by each fiber scanning unit 110 in the scanning unit group 100A have overlapping parts and the longitudinal field of view needs to be met, in these embodiments, the scanning unit group 100A contains 12 fiber scanning units 110 arranged in a row. With this arrangement, the projected images formed by the light output from each scanning unit group 100A will be stitched together to form an image 18, as shown. Figure 9b As shown. In Figure 9b As can be seen, image 18 is formed by stitching together 12 sub-images 180a to 180k. It should be noted that... Figure 9b The horizontal bars between each sub-image represent the overlapping area between the sub-images. The width of the overlapping area will be set according to the actual application needs and should not be construed as a limitation on the solution of this application.

[0098] Of course, for the scanning unit group 100A, in addition to constructing a single image by stitching together, multiple different image fields of view can also be constructed vertically to realize the construction of multiple complete three-dimensional virtual scene fields of view at different vertical positions (this scenario can be used to provide corresponding image fields of view to viewers of different heights). For example, the sub-images 180a to 180c projected and displayed by the fiber optic scanning units 110a to 110c form a complete image field of view; correspondingly, the sub-images 180d to 180f projected and displayed by the fiber optic scanning units 110d to 110f form a complete image field of view; and so on, thus forming multiple image fields of view, and viewers can see three-dimensional virtual scenes at different vertical positions.

[0099] Furthermore, in order to construct a more complete field of view, the fiber optic scanning array 100 has an angle of approximately 150 degrees in the horizontal direction relative to the center of the arc-shaped arrangement. Based on the light scattering angle, it can be calculated that one row requires 1818 scanning unit groups, and a total of 21817 fiber optic scanning units 110 are required.

[0100] The above display system enables the display of 3D virtual scenes in a naked-eye state. On one hand, this system provides viewers with a large depth-of-field viewing experience. Based on this large depth of field, viewers can further explore the display area, supporting a wider range of exploration, thus enhancing the viewer's immersion. In this embodiment, the aforementioned range of exploration corresponds to the viewer's viewing range, which mainly depends on whether light enters the viewer's eye at the viewing position (also known as the observation point). Figure 7 The viewing range 16 can be considered as the intersection of the spatial area enclosed by the line connecting the two ends of the observation point 160 and the trajectory of the directional scattering screen 140, and the display area 15. The farther the human eye is from the screen, the larger the corresponding viewing range 16, which can include the entire display area 15; while the closer the human eye is to the screen, the smaller the corresponding viewing range 16.

[0101] On the other hand, by using fiber optic scanning units, light rays with a sufficiently small divergence angle can be constructed, and through the dense arrangement of scanning unit groups, a continuous field of view display area can be constructed, providing viewers with a continuous spatial display experience and enhancing the viewing experience.

[0102] In other embodiments of this application, the directional scattering screen 240 in the display system has a structure different from the configuration of the directional scattering screen 140 in the aforementioned embodiments. Figure 10 As shown, Figure 10 A longitudinal section of the directional scattering screen 240 is shown; that is, the directional scattering screen 240 has a vertical structure in the longitudinal direction. Specifically, in Figure 10 In the manner shown, the relationship between the vertical width H of the constructed display area 25 and the imaging vertical width h on the directional scattering screen 240 can be expressed as:

[0103]

[0104]

[0105] Where, δ v This refers to the longitudinal range of motion of the human eye. The meanings of the other parameters can be found in the aforementioned content, and will not be elaborated upon here.

[0106] exist Figure 10 In the illustrated embodiment, if the longitudinal field of view is too small, multiple fiber scanning units can be longitudinally spliced ​​together to expand the longitudinal field of view.

[0107] In some embodiments of the display system described in this application, the scanning unit groups in the fiber optic scanning array may also take different forms. (See reference...) Figures 11a-11bThe diagram illustrates a scanning unit group 300A, comprising 12 fiber optic scanning units 310 arranged in a periodically staggered pattern to form two columns, with each column containing six fiber optic scanning units 310. As some feasible implementations, for... Figure 11a The arrangement of the fiber optic scanning units 310 in the scanning unit group 300A shown typically satisfies the condition that the projection positions of the exit pupil positions 33 of each fiber optic scanning unit 310 coincide in the longitudinal direction. However, in other feasible embodiments, the arrangement of the fiber optic scanning units 310 in the scanning unit group 300A can satisfy the condition that the deviation of the projection positions of the exit pupil positions 33 of each fiber optic scanning unit 310 in the longitudinal direction is within a set range. For details, please refer to [reference needed]. Figure 12 The angular misalignment δ of the exit pupil positions 33 of the two staggered fiber scanning units 310 relative to the center of the circle (display center) formed by the display area in the horizontal direction is... ep Less than 0.05 degrees.

[0108] Of course, the above-mentioned arrangement of each fiber scanning unit 310 in the scanning unit group 300A is also applicable to other scanning unit groups in the embodiments of this application.

[0109] refer to Figure 13 Based on the foregoing embodiments, a display system 50 is provided, including: a fiber optic scanning array 500, a directional scattering screen 540, an interaction module 530, and a processing control module 550. Through the interaction module 530, the display system 50 can provide viewers with naked-eye 3D images and interactive functions. The processing control module 550 controls the operation of the fiber optic scanning array 500 and the interaction module 530 within the display system 50.

[0110] The interaction module 530 further includes a face tracking unit 531 and a gesture recognition unit 532.

[0111] The face tracking unit 531 is used to acquire face position information in real time and provide the viewing parameters brought about by the up and down movement of the face, thereby changing the image information of the observed part and providing the longitudinal parallax of the virtual three-dimensional object.

[0112] The gesture recognition unit 532 monitors and captures the gestures made by the viewer, so as to perform scaling, translation, rotation and other actions on the three-dimensional virtual scene according to the gestures.

[0113] The processing control module 550 is used to perform display control on each fiber scanning unit 510 in the fiber scanning array 500, provide image data, etc., including adjusting and changing the displayed three-dimensional virtual scene according to the information obtained by the interaction module 530.

[0114] Of course, in some embodiments of this application, the processing control module 550 performs display control on each fiber scanning unit 510 in the fiber scanning array 500, and also includes the mapping control and adjustment of the projected coordinates of each fiber scanning unit 510 to the real world coordinates.

[0115] The display system described above can not only provide viewers with 3D content that can be viewed without glasses, but also adaptively adjust the 3D display content according to the viewer's facial orientation and gestures through human-computer interaction, thereby further enhancing the viewing experience.

[0116] The terms "first," "second," "first," or "second" as used in the various embodiments of this disclosure may modify various components regardless of their order and / or importance, but these terms do not limit the corresponding components. The above terms are configured only for the purpose of distinguishing one component from another.

[0117] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described utility model concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A display system, characterized in that, include: A fiber optic scanning array includes multiple fiber optic scanning units, which are densely arranged in the horizontal direction of the fiber optic scanning array. The number of fiber optic scanning units arranged in the horizontal direction is much greater than the number of fiber optic scanning units arranged in the vertical direction. A directional scattering screen is configured to perform directional scattering in the longitudinal direction; The fiber optic scanning array is located on one side of the directional scattering screen. The light emitted from the fiber optic scanning array is directionally scattered by the directional scattering screen, forming a display space range for imaging on the other side of the directional scattering screen.

2. The display system as described in claim 1, characterized in that, The fiber scanning units in the fiber scanning array are configured into multiple scanning unit groups, and each scanning unit group contains at least one fiber scanning unit. The number of fiber optic scanning units included in the scanning unit group is positively correlated with the range of the formed display space.

3. The display system as described in claim 2, characterized in that, The scanning unit group includes a column of aligned fiber optic scanning units.

4. The display system as described in claim 2, characterized in that, The scanning unit group includes two columns of fiber optic scanning units arranged in a staggered manner in the longitudinal direction.

5. The display system as described in claim 3 or 4, characterized in that, The exit pupil positions of each fiber scanning unit in each scanning unit group coincide in the longitudinal projection position, or the deviation of the longitudinal projection position is within a set range.

6. The display system as described in claim 2, characterized in that, For any two adjacent scanning unit groups, the angle difference between the exit pupil position of two adjacent fiber scanning units at the same longitudinal position and the display center is no greater than 0.1 degrees.

7. The display system as described in claim 1, characterized in that, The divergence angle of the light emitted by the fiber optic scanning unit in the lateral direction is no greater than 0.1 degrees.

8. The display system as described in claim 7, characterized in that, The directional scattering screen has a vertical structure in the longitudinal direction.

9. The display system as described in claim 7, characterized in that, The directional scattering screen has a longitudinal arc-shaped structure.

10. The display system as claimed in claim 1, characterized in that, The display system also includes an interaction module for acquiring the viewer's interaction commands; In addition, a processing control module is provided for controlling the operation of the fiber optic scanning array and the interaction module.

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