3D LED sand table, compatible multi-angle 3D glasses and system

Abstract

The invention discloses a 3D LED sand table and a pair of compatible multi-angle 3D glasses and system, belongs to the technical field of 3D display, and aims to solve the technical problems of single visual angle, poor glasses adaptability, serious multi-visual-angle display crosstalk and the like during multi-angle watching of an existing 3D sand table system. The 3D LED sand table comprises a sand table overall frame, a first direction display auxiliary screen, a second direction display auxiliary screen, a third direction display auxiliary screen, a fourth direction display auxiliary screen and a 3D LED display main screen, and the four direction display auxiliary screens are oppositely arranged in pairs and used for achieving signal switching and screen control of the main screen. The main screen adopts a polarization type 3D display mode, the absorption axis of the linear polarization layer is 45 degrees or 135 degrees, and an included angle of 45 degrees or 135 degrees is formed between the 1 / 4 lambda phase difference layer and the absorption axis. The compatible multi-angle 3D glasses comprise a glasses body and a rotating mechanism, glasses lenses adopt a double-sided adaptive design, the left and right eye included angles of the 1 / 4 lambda phase difference layer and the linear polarization layer of the A surface and the B surface are respectively 45 degrees and 135 degrees and opposite 135 degrees and 45 degrees, and the A surface and the B surface are switched through the rotating mechanism.

Description

Technical Field

[0001] This invention relates to the field of 3D display technology, and more specifically, to a 3D LED sand table that supports multi-angle viewing and compatible multi-angle 3D glasses. Background Technology

[0002] With the continuous development of 3D display technology, 3D display sand tables, as a display platform integrating stereoscopic display and spatial interaction, have been increasingly widely used in exhibitions, urban planning, military simulations, education, and other fields. Through polarized or shutter-based 3D display technology, 3D sand tables can present three-dimensional scenes with depth and realism, providing users with an immersive visual experience.

[0003] However, most existing 3D sand tables are designed with a single perspective, meaning their main display surface can only serve a viewing area in a fixed direction. In practical applications, users often need to observe the sand table from different directions, and traditional 3D sand tables cannot simultaneously meet the viewing needs of users from multiple angles. To achieve a 3D effect from multiple angles, it is usually necessary to configure a dedicated 3D display system for each direction, or require users to wear multiple pairs of 3D glasses of different specifications to adapt to different polarization directions or viewing angle settings. This not only significantly increases the complexity and cost of the equipment, but also brings the inconvenience of frequently switching or changing glasses to users, seriously affecting the smoothness and user experience.

[0004] Furthermore, current mainstream polarized 3D display solutions often face problems such as unstable beam splitting and severe crosstalk between the left and right eyes during multi-directional adaptation. Especially when displaying 3D content simultaneously from multiple directions, due to light path intersections and polarization mismatches, users at different viewing angles can easily observe overlapping or misaligned images, leading to distorted 3D effects or even making viewing impossible. Although existing technologies have attempted to address these issues through multi-screen combinations or multi-viewpoint partitioned displays, they generally suffer from structural complexity, difficulty in control, and poor glasses compatibility, making it difficult to achieve an efficient and stable multi-directional 3D viewing experience in practical applications.

[0005] In summary, existing 3D sand table systems still have significant shortcomings in terms of viewing angle compatibility, glasses adaptation flexibility, and multi-view display quality. There is an urgent need for a 3D sand table system and its matching glasses that can support multi-angle viewing, are easy to operate, and have excellent display effects, in order to meet the increasingly diverse user needs and application requirements in complex scenarios. Summary of the Invention

[0006] To address the technical problems of existing 3D sand table systems, such as single viewing angle, poor glasses compatibility, and severe crosstalk in multi-view displays, this invention provides a 3D LED sand table, compatible 3D glasses for multi-view viewing, and a system.

[0007] Specifically, the technical problems to be solved by this invention include:

[0008] First, it solves the problem of poor compatibility for multi-directional viewing: Traditional 3D sand tables typically only support 3D viewing from a single fixed direction. Users viewing from other angles will not obtain the correct stereoscopic visual effect. This invention, by setting up a first-direction display sub-screen, a second-direction display sub-screen, a third-direction display sub-screen, and a fourth-direction display sub-screen, in conjunction with a 3D LED display main screen, enables the sand table to simultaneously support users viewing 3D content from four different directions, achieving true multi-view compatibility and meeting the application needs of multiple people viewing from multiple angles simultaneously.

[0009] Secondly, this invention addresses the problems of cumbersome and inconvenient 3D glasses adaptation: In existing technologies, users need to change to different specifications of 3D glasses depending on the viewing direction, or carry multiple pairs for switching, which not only increases usage costs but also reduces the convenience of the experience. This invention provides a dual-sided adaptable 3D glasses system. The optical parameters of the lenses can be quickly switched via a rotating mechanism, making it compatible with display requirements from different directions. Users only need to simply rotate the glasses to adapt their viewing angle, eliminating the need to change glasses and significantly improving ease of use and user experience.

[0010] Third, this invention addresses the severe crosstalk between left and right eye images in multi-view displays: Traditional polarized 3D display solutions are prone to beam splitting failure and crosstalk between left and right eye images when adapting to multiple directions due to optical path crossing and polarization direction mismatch, resulting in distorted 3D effects. This invention precisely sets the absorption axis angle of the linear polarizer (45° and 135°) and makes the absorption axis of the 1 / 4λ phase difference layer and the linear polarizer at 45° or 135° respectively. This ensures effective beam splitting of odd or even columns on the 3D LED display main screen, creating an orthogonal compatible relationship between the polarized light in the first and third directions and the second and fourth directions. This effectively eliminates light interference between different viewing angles, ensuring that users in all directions can obtain clear and stable 3D images.

[0011] Fourth, it solves the problem of complex multi-screen collaborative control: In response to the shortcomings of existing multi-screen 3D display solutions, which are complex in structure and difficult to control, this invention realizes signal switching and collaborative control with the main screen through four sets of directional display sub-screens, which simplifies the system architecture, improves the synchronization and stability of multi-view display, and ensures the accurate presentation of content displayed in each direction.

[0012] To achieve the above objectives, the present invention provides the following technical solution:

[0013] In a first aspect, the present invention provides a 3D LED sand table and compatible multi-angle 3D glasses, comprising a sand table frame 100, a first-direction display sub-screen 201, a second-direction display sub-screen 202, a third-direction display sub-screen 203, a fourth-direction display sub-screen 204, and a 3D LED display main screen 300.

[0014] The first directional display sub-screen 201 and the third directional display sub-screen 203 are arranged facing each other on opposite sides of the overall sand table frame 100; the second directional display sub-screen 202 and the fourth directional display sub-screen 204 are arranged facing each other on the other opposite sides of the overall sand table frame 100.

[0015] The first direction display sub-screen 201, the second direction display sub-screen 202, the third direction display sub-screen 203, and the fourth direction display sub-screen 204 are electrically connected to the 3D LED display main screen 300, respectively, to realize signal switching and screen control of the 3D LED display main screen 300.

[0016] The 3D LED display main screen 300 adopts a polarized 3D display method.

[0017] Preferably, the 3D LED display main screen 300 includes a linear polarizing layer, and the absorption axis of the linear polarizing layer is set to 45° or 135°.

[0018] Preferably, the 3D LED display main screen 300 further includes a 1 / 4λ phase difference layer, wherein the 1 / 4λ phase difference layer forms an angle of 45° or 135° with the absorption axis of the linear polarizing layer, respectively, to achieve odd or even column beam splitting of the 3D LED display main screen 300.

[0019] Secondly, the present invention provides a multi-angle compatible 3D glasses, including a glasses body and a rotating mechanism 401;

[0020] The left and right lenses 402 of the eyeglass body each include a surface A and a surface B, which are located on opposite sides of the polarizer of the lens 402.

[0021] The spectacle lens 402 includes a linear polarizing layer, the absorption axis of which is set to 45° or 135°.

[0022] The A-side of the spectacle lens 402 also includes a 1 / 4λ phase difference layer, and the absorption axis angles between the 1 / 4λ phase difference layer on the A-side and the linear polarization layer are 45° and 135° for the left and right eyes, respectively.

[0023] The B-side of the spectacle lens 402 also includes a 1 / 4λ phase difference layer. The angles between the 1 / 4λ phase difference layer on the B-side and the absorption axis of the linear polarizing layer are 135° and 45° for the left and right eyes, respectively, which is the opposite of the A-side.

[0024] The rotating mechanism 401 is mounted on the glasses body and is used to switch between side A and side B.

[0025] Preferably, side A of the eyeglass lens 402 is used to adapt to viewing the 3D LED main display screen 300 from the first direction display sub-screen 201 and the third direction display sub-screen 203; side B of the eyeglass lens 402 is used to adapt to viewing the 3D LED main display screen 300 from the second direction display sub-screen 202 and the fourth direction display sub-screen 204.

[0026] Preferably, the rotating mechanism 401 is a rotating shaft located at the connection between the temple and the frame, which enables the A-side and B-side to be flipped and switched by rotating the frame.

[0027] Thirdly, the 3D LED sand table system of the present invention includes the 3D LED sand table and the 3D glasses compatible with multiple angles;

[0028] The 3D LED sand table is used in conjunction with the multi-angle compatible 3D glasses. When the user is viewing from the first or third direction, the A side of the 3D glasses faces the eyes; when the user is viewing from the second or fourth direction, the B side of the 3D glasses faces the eyes through the rotation mechanism 401, thus achieving a multi-angle compatible 3D viewing experience.

[0029] The beneficial effects of this invention are:

[0030] 1. Strong multi-view compatibility: By setting up four secondary display screens in different directions, together with the 3D LED display main screen, the sand table can simultaneously support users in four different directions to obtain a clear 3D effect, which significantly improves the interactivity and scene applicability of the sand table and meets the needs of multiple people viewing from multiple angles at the same time.

[0031] 2. Easy to use: The 3D glasses adopt a double-sided fitting design, and the viewing angle can be quickly matched by rotating the glasses. Users can switch between different viewing directions simply by rotating the glasses. There is no need to change glasses or add other auxiliary equipment. The operation is simple and convenient, which greatly improves the user experience.

[0032] 3. Excellent display effect: The 3D LED display main screen adopts a 45° / 135° orthogonal polarization design. By precisely setting the absorption axis angle of the linear polarization layer and the matching relationship of the 1 / 4λ phase difference layer, the polarized light in the first and third directions and the second and fourth directions form an orthogonal compatible relationship, which effectively reduces crosstalk between the left and right eye images and improves the clarity and stability of the 3D picture.

[0033] 4. High system integration: The system achieves signal switching and collaborative control with the main screen through four sets of directional display sub-screens, which simplifies the system architecture, improves the synchronization and stability of multi-view display, and reduces system complexity and manufacturing costs. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of the 3D LED sand table provided in an embodiment of the present invention.

[0035] Figure 2 This is a top view structural diagram of a 3D LED sand table provided in an embodiment of the present invention, wherein... Figure 2 (a) and Figure 2 (b) are two state diagrams before and after the glasses are rotated.

[0036] Figure 3 This is a schematic diagram of the structure of multi-angle compatible 3D glasses provided in an embodiment of the present invention, wherein... Figure 3 (a) is a diagram of the left eye structure. Figure 3 (b) is a diagram of the right eye structure.

[0037] In the diagram: 100 - Overall frame of the sand table; 201 - Secondary display screen in the first direction; 202 - Secondary display screen in the second direction; 203 - Secondary display screen in the third direction; 204 - Secondary display screen in the fourth direction; 300 - Main 3D LED display screen; 401 - Rotation mechanism; 402 - Eyeglass lens. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0039] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0040] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0041] Example 1: 3D LED Sand Table

[0042] like Figure 1 and Figure 2 As shown, this embodiment provides a 3D LED sand table, including a sand table overall frame 100, a first-direction display sub-screen 201, a second-direction display sub-screen 202, a third-direction display sub-screen 203, a fourth-direction display sub-screen 204, and a 3D LED display main screen 300.

[0043] The overall frame 100 of the sand table is rectangular in shape and made of metal or high-strength plastic, used to support and fix the various display screens. The first-direction sub-screen 201 and the third-direction sub-screen 203 are arranged facing each other on both sides of the long side of the overall frame 100; the second-direction sub-screen 202 and the fourth-direction sub-screen 204 are arranged facing each other on both sides of the short side of the overall frame 100. The four sub-screens are electrically connected to the 3D LED main display screen 300, used to realize signal switching and screen control of the 3D LED main display screen 300. Specifically, when a user views from a certain direction, the corresponding sub-screen can trigger the main screen to switch to a display mode adapted to that direction, or adjust the displayed content of the main screen accordingly.

[0044] The 3D LED display main screen 300 adopts a polarized 3D display method, including a linear polarizing layer and a 1 / 4λ phase difference layer. The absorption axis of the linear polarizing layer is set to 45° or 135°. The 1 / 4λ phase difference layer forms an angle of 45° or 135° with the absorption axis of the linear polarizing layer, respectively, to achieve odd or even column beam splitting of the 3D LED display main screen 300, ensuring that the left and right eyes receive the correct polarized images. Specifically, the odd and even columns are set with different angles, thereby generating circularly polarized light with opposite directions of rotation, which respectively carry the images of the left and right eyes to achieve 3D display.

[0045] In a preferred embodiment of this invention, the absorption axis of the linear polarizing layer is set to 45°, and the 1 / 4λ phase difference layer forms a 45° angle with the absorption axis of the linear polarizing layer, thereby achieving 300 odd-numbered columns of light splitting on the 3D LED display main screen. In this case, the light emitted from the odd-numbered columns of pixels forms the left-eye image after polarization processing, while the even-numbered columns of pixels form the right-eye image, with the polarization directions of the left and right eye images being orthogonal to each other.

[0046] In another preferred implementation of this embodiment, the absorption axis of the linear polarizing layer is set to 135°, and the 1 / 4λ phase difference layer forms a 135° angle with the absorption axis of the linear polarizing layer, thereby achieving 300 even-numbered columns of beam splitting on the 3D LED display main screen. In this case, odd-numbered columns of pixels form the right-eye image, and even-numbered columns of pixels form the left-eye image, thus achieving orthogonal polarization directions for the left and right-eye images.

[0047] Through the above design, when a user views from the first or third direction, the polarized light output by the main screen has a first set of orthogonal polarization directions. For example, the main screen outputs odd-numbered columns with left-hand polarization and even-numbered columns with right-hand polarization; the A-side of the 3D glasses adapts to left-hand polarization for the left eye and right-hand polarization for the right eye. When a user views from the second or fourth direction, the polarized light output by the main screen switches to a second set of orthogonal polarization directions through signal switching on the secondary display screen. For example, the main screen outputs odd-numbered columns with right-hand polarization and even-numbered columns with left-hand polarization (or keeps them the same, but the glasses switch to the B-side); the B-side of the 3D glasses adapts to right-hand polarization for the left eye and left-hand polarization for the right eye (opposite to the A-side). The two sets of polarization directions are compatible with each other, ensuring that users in all directions can obtain the correct 3D visual effect.

[0048] Example 2: Multi-angle compatible 3D glasses

[0049] like Figure 3 As shown, this embodiment provides a multi-angle compatible 3D glasses, which are applied to the 3D LED sand table described in Embodiment 1.

[0050] The 3D glasses include a glasses body and a rotating mechanism 401. The left and right lenses 402 of the glasses body both adopt a double-sided adaptation design, including a side A and a side B, which are located on opposite sides of the polarizing film of the lens.

[0051] The spectacle lens includes a linear polarizing layer, the absorption axis of which is set to 45° or 135°. In this embodiment, it is preferably set to 45°.

[0052] The A-side of the spectacle lens also includes a 1 / 4λ retardation layer. The angles between the 1 / 4λ retardation layer of the A-side and the absorption axis of the linear polarizing layer are 45° and 135° for the left and right eyes, respectively. Specifically, the 1 / 4λ retardation layer of the A-side of the left eye forms a 45° angle with the absorption axis of the linear polarizing layer, while the 1 / 4λ retardation layer of the A-side of the right eye forms a 135° angle with the absorption axis of the linear polarizing layer.

[0053] The B-side of the spectacle lens also includes a 1 / 4λ retardation layer. The angles between the 1 / 4λ retardation layer on the B-side and the absorption axis of the linear polarizing layer are 135° and 45° for the left and right eyes, respectively, which are opposite to those on the A-side. Specifically, the 1 / 4λ retardation layer on the B-side of the left eye forms a 135° angle with the absorption axis of the linear polarizing layer, while the 1 / 4λ retardation layer on the B-side of the right eye forms a 45° angle with the absorption axis of the linear polarizing layer.

[0054] The rotating mechanism 401 is installed on the eyeglasses body, specifically as a rotating shaft installed at the connection between the temple and the eyeglass frame. By rotating the eyeglass frame, the A-side and B-side can be flipped and switched.

[0055] In another embodiment, the absorption axis of the linear polarizing layer is set to 135°. Correspondingly, the angles between the 1 / 4λ phase difference layer on surface A and the absorption axis of the linear polarizing layer are 135° and 45° for the left and right eyes, respectively, and the angles between the 1 / 4λ phase difference layer on surface B and the absorption axis of the linear polarizing layer are 45° and 135° for the left and right eyes, respectively.

[0056] How to use:

[0057] When a user views the 3D LED main display 300 from either the first-direction secondary display screen 201 or the third-direction secondary display screen 203, the A-side of the 3D glasses should face the user's eyes. At this time, the left eye receives 45° polarized light, and the right eye receives 135° polarized light, which matches the first set of orthogonal polarization directions output by the main screen, thus obtaining the correct 3D visual effect.

[0058] When the user moves to view the second-direction display sub-screen 202 or the fourth-direction display sub-screen 204, the glasses frame is flipped by the rotation mechanism 401 so that the B-side faces the eyes. At this time, the left eye receives 135° polarized light and the right eye receives 45° polarized light, which matches the second set of orthogonal polarization directions output by the main screen, thus obtaining the correct 3D visual effect.

[0059] Users can easily adapt their viewing angle to different directions simply by rotating their glasses without having to change them, making it very convenient.

[0060] Example 3: 3D LED Sand Table Display System

[0061] This embodiment provides a 3D LED sand table display system, including the 3D LED sand table described in Embodiment 1 and the multi-angle compatible 3D glasses described in Embodiment 2.

[0062] The 3D LED sand table, used in conjunction with the multi-angle compatible 3D glasses, constitutes a complete display system. When the user views from a first or third direction, the 3D LED main display screen 300 outputs a first set of orthogonally polarized light, and the user views using side A of the 3D glasses. When the user views from a second or fourth direction, through signal switching of the secondary display screen, the 3D LED main display screen 300 outputs a second set of orthogonally polarized light, and the user switches the 3D glasses to side B using the rotation mechanism 401.

[0063] Through the above coordination, the system enables users in four directions to simultaneously obtain clear, crosstalk-free 3D visual effects, significantly improving the interactivity and scene applicability of the sand table.

[0064] Explanation of optical principles:

[0065] The optical design of this invention is based on the principle of circularly polarized light. A linear polarizing layer converts natural light into linearly polarized light, and a 1 / 4λ phase difference layer converts the linearly polarized light into left- or right-hand circularly polarized light. By setting different angle combinations, the circularly polarized light received by the left and right eyes is made to rotate in opposite directions, thereby creating stereoscopic vision.

[0066] When a user changes their viewing direction, the polarization direction of the main display screen output may change. By rotating the glasses to switch between the A and B sides, the polarization conversion characteristics of the glasses are matched with the output of the main screen, ensuring that the left and right eyes always receive the correct image information and effectively avoiding crosstalk.

[0067] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A 3D LED sand table, characterized in that, It includes the overall sand table frame (100), the first direction display sub-screen (201), the second direction display sub-screen (202), the third direction display sub-screen (203), the fourth direction display sub-screen (204), and the 3D LED display main screen (300). The first directional display sub-screen (201) and the third directional display sub-screen (203) are arranged facing each other on opposite sides of the overall sand table frame (100); the second directional display sub-screen (202) and the fourth directional display sub-screen (204) are arranged facing each other on the other opposite sides of the overall sand table frame (100); The first direction display sub-screen (201), the second direction display sub-screen (202), the third direction display sub-screen (203), and the fourth direction display sub-screen (204) are electrically connected to the 3D LED display main screen (300) respectively, and are used to realize signal switching and screen control of the 3D LED display main screen (300); The 3D LED display main screen (300) adopts a polarized 3D display method.

2. The 3D LED sand table according to claim 1, characterized in that, The 3D LED display main screen (300) includes a linear polarizing layer, the absorption axis of which is set to 45° or 135°.

3. A 3D LED sand table according to claim 2, characterized in that, The 3D LED display main screen (300) also includes a 1 / 4λ phase difference layer, which forms an angle of 45° or 135° with the absorption axis of the linear polarizing layer, respectively, to realize the odd or even column beam splitting of the 3D LED display main screen (300).

4. A multi-angle compatible 3D glasses, applied to the 3D LED sand table according to any one of claims 1-3, characterized in that, Includes the eyeglass body and the rotating mechanism (401); The left and right lenses (402) of the eyeglass body each include a surface A and a surface B, which are located on opposite sides of the polarizer of the lens (402); The eyeglass lens (402) includes a linear polarizing layer, wherein the absorption axis of the linear polarizing layer is set to 45° or 135°; The A-side of the spectacle lens (402) also includes a 1 / 4λ phase difference layer, and the absorption axis angle between the 1 / 4λ phase difference layer of the A-side and the linear polarization layer is 45° and 135° for the left and right eyes, respectively. The B-side of the spectacle lens (402) further includes a 1 / 4λ phase difference layer. The angle between the 1 / 4λ phase difference layer on the B-side and the absorption axis of the linear polarizing layer is 135° and 45° for the left and right eyes, respectively, which is the opposite of the A-side. The rotating mechanism (401) is mounted on the eyeglasses body and is used to switch between side A and side B.

5. The multi-angle compatible 3D glasses according to claim 4, characterized in that, The A side of the eyeglass lens (402) is used to adapt to the viewing of the 3D LED display main screen (300) from the first direction display sub-screen (201) and the third direction display sub-screen (203); the B side of the eyeglass lens (402) is used to adapt to the viewing of the 3D LED display main screen (300) from the second direction display sub-screen (202) and the fourth direction display sub-screen (204).

6. The multi-angle compatible 3D glasses according to claim 4, characterized in that, The rotating mechanism (401) is a rotating shaft located at the connection between the temple and the frame of the glasses, which enables the flipping and switching of the A-side and the B-side by rotating the frame of the glasses.

7. A 3D LED sand table system, characterized in that, Includes the 3D LED sand table as described in any one of claims 1-3, and the multi-angle compatible 3D glasses as described in any one of claims 4-6; The 3D LED sand table is used in conjunction with the multi-angle compatible 3D glasses. When the user is viewing from the first or third direction, the A side of the 3D glasses faces the eyes; when the user is viewing from the second or fourth direction, the B side of the 3D glasses faces the eyes through the rotation mechanism (401), thus achieving a multi-angle compatible 3D viewing experience.

Images