Naked eye 3D display screen and assembling tool thereof

Abstract

The present application relates to a kind of naked eye 3D display screen.The naked eye 3D display screen includes display component and integrated optical cover plate, integrated optical cover plate covers the surface of display component, optical cover plate includes several microlenses arranged in array;Display component includes multiple COB LED modules arranged in array, each COB LED module includes multiple groups of RGB pixels, and each group of RGB pixels has a corresponding microlens.The above setting, relative to the current multiple split optical cover plate and multiple COB LED module one-to-one corresponding mode, avoids the problem that the seam of optical cover plate and the seam of COB LED module are superimposed in prior art, avoids the phenomenon that 3D effect fault occurs in splicing area;A piece of optical cover plate is aligned with each COB LED module, shortens installation debugging cycle;Integrated optical cover plate is overall structure, avoids the problem that optical cover plate aging, thermal deformation rate is inconsistent.

Description

Technical Field

[0001] This invention relates to the field of glasses-free 3D technology, and in particular to a glasses-free 3D display screen and its assembly fixture. Background Technology

[0002] Glasses-free 3D displays provide a stereoscopic visual experience without requiring users to wear any auxiliary devices, making them widely used in large exhibition halls, outdoor advertising, immersive cinemas, and other venues. As people's demands for immersive visual experiences continue to increase, the market demand for large-size glasses-free 3D displays is growing rapidly.

[0003] Currently, to obtain large-size glasses-free 3D displays, glasses-free 3D displays include multiple spliced ​​COB LED (ChipOn Board LED) modules and multiple optical cover plates that are correspondingly set on the COB LED modules.

[0004] However, the overlapping of splicing seams between multiple COB LED modules and multiple optical cover plates can easily create "optical black holes" or "ghosting bands" in the splicing area, resulting in severe 3D effect discontinuity and affecting the 3D effect. On the other hand, multiple COB LED modules need to be aligned with multiple optical cover plates one by one, which results in a long overall installation and debugging cycle and high cost. Moreover, the aging and thermal deformation rates of each optical cover plate are different. After long-term use, the difference in alignment deviation between different optical cover plates and corresponding COB LED modules will widen, which can easily lead to inconsistent 3D effects in different areas and make maintenance difficult. Summary of the Invention

[0005] Therefore, it is necessary to provide a glasses-free 3D display screen to address the problems of severe discontinuity in the splicing area, long overall installation and debugging cycle, and inconsistent 3D effects in different areas after long-term use of current glasses-free 3D displays.

[0006] A glasses-free 3D display screen, comprising a display component and an integrated optical cover, wherein: An integrated optical cover plate covers the surface of the display component, and the optical cover plate includes a plurality of microlenses arranged in an array; The display component includes multiple COB LED modules arranged in an array, each COB LED module includes multiple groups of RGB pixels, and each group of RGB pixels has a corresponding microlens.

[0007] In one embodiment, the optical cover has a first region facing each of the COB LED modules, wherein the microlens in the first region are first microlenses, and the array period of the first microlenses is equal to the pixel pitch in the COB LED module.

[0008] In one embodiment, the axis of the first microlens forms a first angle with the first direction, and the first angle ranges from 5° to 15°.

[0009] In one embodiment, the optical cover has a second region directly opposite the mating point of two adjacent COB LED modules, the width of the second region along a second direction being greater than the gap between the two adjacent COB LED modules, the second direction being perpendicular to the first direction; The microlens in the second region is a second microlens, and the array period of the second microlens is greater than the array period of the first microlens.

[0010] In one embodiment, the axis of the second microlens forms a second angle with the first direction, and the second angle is greater than the first angle.

[0011] In one embodiment, the surface roughness Ra of the optical cover is no greater than 5 nm.

[0012] The aforementioned glasses-free 3D display screen, by using an integrated optical cover plate to cover multiple COB LED modules to form the display component, avoids the problem of overlapping seams between the optical cover plate and the COB LED modules, compared to the current method of one-to-one correspondence between multiple separate optical cover plates and multiple COB LED modules. Structurally, it avoids the phenomena of optical black holes, ghosting bands, and 3D effect breaks in the splicing area, ensuring a uniform and continuous 3D effect throughout the display screen without visual breaks. Moreover, the alignment of one optical cover plate with each COB LED module eliminates the need for individual alignment of multiple optical cover plates with each COB LED module, effectively shortening the installation and debugging cycle, reducing labor and time costs, and improving assembly efficiency. In addition, the integrated optical cover plate is a monolithic structure, avoiding problems such as optical cover plate aging and inconsistent thermal deformation rates, and maintaining a precise correspondence between RGB pixels and microlenses. This ensures long-term stable and consistent 3D display effects in all areas of the glasses-free 3D display screen, extending the lifespan of the display screen and significantly reducing the difficulty and cost of later maintenance.

[0013] This application also provides an assembly fixture for assembling the naked-eye 3D display screen described in any of the above embodiments, the assembly fixture including a first positioning frame, a second positioning frame, and a locking assembly, wherein: The locking assembly includes a guide member and a guide hole. The guide member is disposed on one of the first positioning frame and the second positioning frame, and the guide hole is disposed on the other of the two. The first positioning frame is used to install the display components; The second positioning frame is used to install the optical cover plate; When the second positioning frame covers the first positioning frame, the guide is inserted into the guide hole, and the optical cover plate on the second positioning frame faces the display component that is attached to the first positioning frame.

[0014] In one embodiment, the first positioning frame includes a positioning frame and a mounting frame, wherein the positioning frame is provided with a plurality of positioning ports; The number of mounting brackets is multiple, and the multiple mounting brackets are detachably installed in the multiple positioning ports in a one-to-one correspondence. The multiple mounting brackets are used to position the multiple COB LED modules in a one-to-one correspondence.

[0015] In one embodiment, each of the mounting brackets is provided with a positioning pin, and the COB LED module is provided with a positioning hole corresponding to the positioning pin, wherein the positioning pin can be detachably inserted into the positioning hole.

[0016] In one embodiment, the assembly fixture further includes a flatness detection device and a flatness adjuster, wherein the flatness detection device is used to detect the flatness of the display component; Each mounting bracket is provided with at least one flatness adjuster, which is used to adjust the height of the corresponding COB LED module.

[0017] In one embodiment, the flatness adjuster includes a connecting rod, a support platform, and a knob. The connecting rod passes through the mounting frame along the thickness direction of the mounting frame, and the connecting rod is movable relative to the mounting frame. The support platform is disposed at one end of the connecting rod, and the side of the support platform away from the connecting rod faces the COB LED module; The knob is located at the end of the connecting rod away from the support platform, and on the side of the mounting bracket away from the COB LED module.

[0018] In one embodiment, fasteners are passed through the mounting bracket and secured to the COB LED module.

[0019] In one embodiment, the second positioning frame has a positioning cavity, and the assembly fixture further includes an adsorption device for adsorbing or releasing the optical cover plate into or out of the positioning cavity.

[0020] In one embodiment, the assembly fixture further includes a control module and a first acquisition module, a second acquisition module, and a fine-tuning device communicatively connected to the control module, wherein: The first acquisition module is used to acquire the first position information of each of the COB LED modules; The second acquisition module is used to acquire the second position information of the optical cover plate; The fine-tuning device is disposed on the second positioning frame, and the fine-tuning device is used to adjust the position of the optical cover plate along the first direction and the second direction, wherein the first direction and the second direction are perpendicular; The control module is used to control the operation of the fine-tuning device based on the first position information and the second position information.

[0021] In one embodiment, the second positioning frame is provided with a plurality of the fine-tuning devices spaced apart along both the first direction and the second direction; The fine-tuning device includes a fine-tuning drive disposed on the second positioning frame and a transmission block disposed on the output end of the fine-tuning drive, the transmission block being used to abut against the optical cover plate.

[0022] In one embodiment, the second positioning frame is made of aluminum alloy, and the bending stiffness of the second positioning frame is not less than 1000 N / mm.

[0023] The aforementioned assembly fixture achieves alignment between the first and second positioning frames through locking components, facilitating efficient alignment and assembly of the display components on the first positioning frame and the optical cover plates on the second positioning frame, significantly improving assembly efficiency and alignment accuracy. Furthermore, the optical cover plates on the second positioning frame are of a single integrated structure, compared to the current method of one-to-one correspondence between multiple separate optical cover plates and multiple COB LED modules: This design avoids the problem of overlapping seams between the optical cover plate and COB LED modules in existing technologies. Structurally, it prevents optical black holes, ghosting bands, and 3D effect breaks in the splicing area, ensuring a uniform and continuous 3D effect throughout the display without visual defects. Furthermore, one optical cover plate is aligned with each COB LED module, eliminating the need for individual alignment of multiple optical cover plates with each COB LED module, effectively shortening the installation and debugging cycle, reducing labor and time costs, and improving assembly efficiency. In addition, the integrated optical cover plate is a monolithic structure, avoiding issues such as optical cover plate aging and inconsistent thermal deformation rates. It can always maintain the precise correspondence between RGB pixels and microlenses, ensuring long-term stable and consistent 3D display effects in all areas of the naked-eye 3D display. This not only extends the lifespan of the naked-eye 3D display but also significantly reduces the difficulty and cost of later maintenance. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a naked-eye 3D display screen provided in an embodiment of this application.

[0027] Figure 2 for Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0028] Figure 3 This is a schematic diagram of the assembly tooling provided in one embodiment of the present application when it is used in conjunction with a naked-eye 3D display screen.

[0029] Figure 4 An exploded view of the structure of a first positioning frame provided in an embodiment of this application.

[0030] Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point B.

[0031] Figure 6 for Figure 4 Enlarged schematic diagram of the structure at point C.

[0032] Figure 7 This is a structural schematic diagram of a single mounting bracket and a single COB LED module provided in an embodiment of this application.

[0033] Figure 8 This is a schematic diagram of the structure of the second positioning frame provided in an embodiment of this application.

[0034] Figure 9 This is a schematic diagram of the structure of a fine-tuning device provided in an embodiment of this application.

[0035] Explanation of reference numerals in the attached figures 10. Glasses-free 3D display screen; a. First direction; b. Second direction; α. First included angle; 20. Assembly fixture; 100. Display component; 110. COB LED module; 111. Connecting post; 200, Optical cover plate; 210, First region; 211, First microlens; 220, Second region; 300. First positioning frame; 310. Positioning frame; 311. Base plate; 3111. Positioning port; 3112. Connecting through hole; 312. Side wall; 3121. Mounting through hole; 320. Mounting bracket; 321. Mounting box; 322. Extension wall; 3221. Receiving through hole; 330. Positioning pin; 340. Positioning post; 350. Positioning through hole; 400, Second positioning frame; 410, Top plate; 411, Suction port; 420, Enclosing side wall; 430, Positioning cavity; 500. Locking assembly; 510. Guide component; 520. Guide hole; 600. Flatness adjuster; 610. Connecting rod; 620. Support platform; 630. Knob; 700. Fine-tuning device; 710. Fine-tuning drive; 720. Transmission block; 730. Flexible buffer pad; 800. Infrared camera. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0037] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0038] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] The technical solutions provided by the embodiments of the present invention are described below with reference to the accompanying drawings.

[0041] See Figure 1 and Figure 2 As shown, one embodiment of this application provides a glasses-free 3D display screen 10, which includes a display component 100 and an integrated optical cover plate 200. The integrated optical cover plate 200 covers the surface of the display component 100 and includes a plurality of microlenses arranged in an array. In specific manufacturing, the optical cover plate 200 is formed by imprinting with an imprinting mold. The diameter of the microlenses formed by imprinting is preferably 0.7mm-1mm. Specifically, the diameter of the microlenses can be any value from 0.7mm-1mm, such as 0.75mm, 0.8mm, 0.85mm, 0.9mm, or 0.94mm, but the diameter of the microlenses is not limited to the above 0.7mm-1mm and can be any value designed according to actual needs.

[0042] The display component 100 includes a plurality of COB LED modules 110 arranged in an array. In specific configurations, the plurality of COB LED modules 110 are combined in an n (row) * n (column) or n (row) * m (column) configuration, where M and N are natural numbers. In this application, the plurality of COB LED modules 110 are illustrated in a 4-column 2-row arrangement, but are not limited to the above quantity and arrangement. For example, the area of ​​a single COB LED module 110 is 168.75mm × 150mm, and the area of ​​the display component 100 formed by the plurality of COB LED modules 110 arranged in a 4-column 2-row configuration is 600mm × 337.5mm.

[0043] It should also be noted that each COB LED module 110 includes multiple sets of RGB pixels, and each set of RGB pixels has a corresponding microlens. This setup ensures that each set of luminous pixels can achieve a precise 3D effect through its corresponding microlens, avoiding problems such as color mixing, ghosting, uneven brightness, and narrow viewing angles caused by misalignment between the microlens and the RGB pixels.

[0044] The aforementioned naked-eye 3D display screen 10, by setting an integrated optical cover plate 200 to cover the display component 100 formed by multiple COB LED modules 110, avoids the problem of overlapping seams between the optical cover plate 200 and COB LED modules 110 in the existing technology, compared to the current method of one-to-one correspondence between multiple separate optical cover plates 200 and multiple COB LED modules 110. Structurally, it avoids the phenomenon of optical black holes, ghosting bands, and 3D effect breaks in the splicing area, ensuring that the 3D effect of the entire display screen is uniform and continuous, without visual breakage defects. Moreover, one optical cover plate 200 is aligned with each COB LED module 110, eliminating the need for alignment between multiple optical cover plates 200 and each COB LED module 110. The LED modules 110 are aligned one by one, effectively shortening the installation and debugging cycle, reducing manpower and time costs, and improving assembly efficiency. In addition, the integrated optical cover 200 is an integral structure, avoiding the problems of aging and inconsistent thermal deformation rates of the optical cover 200. It can always maintain the precise correspondence between RGB pixels and microlenses, ensuring that the 3D display effect of each area of ​​the naked-eye 3D display screen 10 is stable and consistent in the long term. On the one hand, it helps to extend the service life of the naked-eye 3D display screen 10, and on the other hand, it greatly reduces the difficulty of later maintenance and reduces maintenance costs.

[0045] In specific configuration, in order to ensure that the size of the optical cover plate 200 matches that of the display component 100, when multiple COBLED modules 110 are arranged in 4 columns and 2 rows to form a display component 100 with an area size of 600mm×337.5mm, the area size of the optical cover plate 200 is preferably 600mm×337.5mm, and the thickness of the optical cover plate 200 is preferably 1.2mm, which can completely cover the matrix arrangement of 8 COB modules.

[0046] To ensure precise alignment between the RGB pixels and microlenses in each COB LED module 110 and improve the alignment consistency between the optical cover plate 200 and the RGB pixels in the display component 100, in some embodiments, the optical cover plate 200 has a first region 210 directly opposite each COB LED module 110. The microlenses in the first region 210 are first microlenses 211, and the array period of the first microlenses 211 is equal to the pixel pitch in the COB LED module 110.

[0047] In specific configurations, the pixel pitch (P) in the COB LED module 110 can be 0.8mm-1mm, i.e., P0.8-P1.0; correspondingly, the array period of the first microlens 211 is 0.8mm-1mm. For example, the pixel pitch P and the array period of the first microlens 211 can be any value within the range of 0.8mm-1mm, such as 0.9mm or 0.93mm, but the pixel pitch P and the array period of the first microlens 211 are not limited to the aforementioned 0.8mm-1mm and can be any value designed according to actual needs.

[0048] Meanwhile, the focal length (f) of the microlens can be calculated based on the specific value of the pixel pitch P: f = pixel pitch P × 1.67, where 1.67 is a unit of measurement. For example, when the pixel pitch P is 0.9 mm, the focal length f of the microlens is 1.5 mm.

[0049] The above settings ensure that a single microlens can completely cover one group of RGB pixels, and the focal length error of the full-screen microlens is ≤ ±0.05mm.

[0050] In some embodiments, the axial direction of the first microlens 211 forms a first angle α with the first direction a, and the range of the first angle α is 5°-15°. That is, the angle between the optical axis of the first microlens 211 and the normal is in the range of 5°-15°. For example, the specific value of the first angle α can be a value in the range of 5°-15°, such as 10°, 11°, 12°, etc.

[0051] It should be noted that, with the above settings, under optical simulation verification, the overlap of the viewing area within the full 60° range of the naked-eye 3D display screen 10 is ≤10%, the light transmittance is ≥90%, the light crosstalk rate of the area corresponding to the microlens at the splicing seam between COB LED modules 110 is ≤3%, and the effective viewing angle can reach more than 60°.

[0052] To ensure that the RGB pixels located at the seam of the COB LED modules 110 have facing microlenses, thereby improving the visual clarity, overall consistency, and 3D effect continuity of the large-size naked-eye 3D display screen 10 and the splicing area of ​​the COB LED modules 110, in some embodiments, the optical cover plate 200 has a second region 220 that faces the seam of two adjacent COB LED modules 110. The width of the second region 220 along the second direction b is greater than the gap between the two adjacent COB LED modules 110, and the second direction b is perpendicular to the first direction a.

[0053] In specific configuration, the gap between the joints of two adjacent COB LED modules 110 is guaranteed to be less than 0.1 mm. For example, the width of the second region 220 along the second direction b is preferably 0.3 mm, and the second region 220 overlaps with the first region 210 on both sides of the joint by 0.1 mm.

[0054] The microlenses in the second region 220 are second microlenses, and the array period of the second microlenses is greater than that of the array period of the first microlenses 211. When the gap in the mating seam is kept within less than 0.1 mm, the array period of the second microlenses is 0.05 mm larger than that of the first microlenses 211 to accommodate the slight positional shift of the RGB pixels at the mating seam. This ensures that the microlenses in the second region 220 can completely cover the RGB pixel groups on both sides of the mating seam, thus filling in any optical breaks in the mating seam.

[0055] To further minimize the visual presence of the seam, in some embodiments, the axis of the second microlens is parallel to the axis of the first microlens 211, and the axis of the second microlens forms a second angle with the first direction α, which is greater than the first angle α. The range of the second angle is 8°-16°, that is, the angle between the optical axis of the second microlens and the normal is in the range of 8°-16°. For example, the specific value of the second angle can be a value in the range of 8°-16°, such as 9°, 10°, 12°, 14°, 15°, etc.

[0056] With the above settings, the second area 220, which is the transition area directly opposite the docking point of the COB LED module 110, adopts a parameter gradient design to ensure a smooth transition of the optical axis of the microlens, avoid light beam disorder caused by sudden angle changes, make the left and right eye beam splitting at the docking point more uniform, offset the abnormal light refraction caused by the gap of the COB LED module 110, further weaken the visual presence of the splicing seam, and ensure that the 3D stereoscopic effect, brightness and clarity of the splicing area and the core display area are completely unified. Even after long-term viewing, the splicing traces of the COB LED module 110 cannot be detected, thus improving the overall immersive visual experience.

[0057] In some embodiments, the surface roughness Ra of the optical cover plate 200 is no greater than 5 nm. For example, the specific value of the surface roughness Ra of the optical cover plate 200 can be a value less than or equal to 5 nm, such as 1 nm, 2 nm, 3 nm, 3.5 nm, or 4 nm. Through the above settings, the reflection and scattering loss of light on the surface of the optical cover plate 200 is reduced, and the light transmittance is improved, resulting in a transmittance of up to 90%, ensuring uniform overall brightness of the naked-eye 3D display screen 10.

[0058] With the above settings, the optical cover plate 200 covers the display component 100 composed of multiple COB LED modules 110 spliced ​​together, and the microlenses in the optical cover plate 200 are precisely aligned with the RGB pixels at the micron level, which can improve the visual clarity, overall consistency and 3D effect continuity of the large-size naked-eye 3D display screen 10 spliced ​​together with the COB LED modules 110.

[0059] It should also be noted that when the operating temperature of the circuit board in the COB LED module 110 is too high, it can cause thermal deformation of the optical cover plate 200. Based on this, the naked-eye 3D display 10 of this application also includes multiple temperature sensors. These multiple temperature sensors are set one-to-one and collect temperature data from multiple COB LED modules 110 in real time. The collected temperature data helps to compensate for deviations caused by thermal deformation in advance, for example, by setting the array period of the microlenses for deviation compensation.

[0060] In specific settings, the optical cover plate 200 is preferably made of high-temperature resistant PC material, which can operate stably between -40℃ and 120℃.

[0061] It should also be emphasized that currently, the alignment and bonding of the optical cover plate 200 and the display component 100 are entirely done manually, making it difficult to guarantee the alignment accuracy of the integrated optical cover plate 200 and the display component 100. To eliminate the deviations caused by manual assembly, this application also provides an assembly fixture 20 for assembling the naked-eye 3D display screen 10 described in any of the above embodiments, so as to achieve efficient alignment and assembly of the display component 100 and the optical cover plate 200, ensure the flatness of the naked-eye 3D display screen 10 after assembly, and ensure the alignment accuracy of pixels and lenses, thereby significantly reducing the assembly difficulty and debugging cycle.

[0062] Combination Figure 3 As shown, an embodiment of this application provides an assembly fixture 20 including a first positioning frame 300, a second positioning frame 400, and a locking assembly 500. The locking assembly 500 includes a guide member 510 and a guide hole 520. The guide member 510 is disposed on one of the first positioning frame 300 and the second positioning frame 400, and the guide hole 520 is disposed on the other. Figure 3 An example is given with guide member 510 provided in the first positioning frame 300 and guide hole 520 provided in the second positioning frame 400.

[0063] The first positioning frame 300 is used to install the display component 100, and the second positioning frame 400 is used to install the optical cover plate 200.

[0064] When the second positioning frame 400 is closed on the first positioning frame 300, the guide member 510 is inserted into the guide hole 520. That is, the locking assembly 500 realizes the guiding docking and precise alignment of the first positioning frame 300 and the second positioning frame 400, avoiding misalignment during the closing process, and ensuring that the optical cover plate 200 on the second positioning frame 400 is aligned with the display component 100 attached to the first positioning frame 300.

[0065] The aforementioned assembly fixture 20, through the locking component 500, aligns the first positioning frame 300 and the second positioning frame 400, facilitating efficient alignment and assembly of the display component 100 on the first positioning frame 300 and the optical cover plate 200 on the second positioning frame 400, significantly improving assembly efficiency and alignment accuracy. Furthermore, the optical cover plate 200 on the second positioning frame 400 is a one-piece structure, which is significant compared to the current method where multiple separate optical cover plates 200 correspond one-to-one with multiple COB LED modules 110. This design avoids the problem of overlapping seams between the optical cover plate 200 and the COB LED module 110 in existing technologies. Structurally, it prevents optical black holes, ghosting bands, and 3D effect breaks in the splicing area, ensuring a uniform and continuous 3D effect throughout the display without visual defects. Furthermore, the alignment of one optical cover plate 200 with each COB LED module 110 eliminates the need for individual alignment of multiple optical cover plates 200 with each COB LED module 110, reducing manpower and time costs and improving assembly efficiency. In addition, the integrated optical cover plate 200 is a monolithic structure, avoiding issues such as aging and inconsistent thermal deformation rates. It maintains a precise correspondence between RGB pixels and microlenses, ensuring long-term stable and consistent 3D display effects across all areas of the naked-eye 3D display screen 10. This extends the lifespan of the naked-eye 3D display screen 10 and significantly reduces maintenance difficulty and costs.

[0066] Combination Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, in order to achieve precise positioning of each COB LED module 110 by the first positioning frame 300, in some embodiments, the first positioning frame 300 includes a positioning frame 310 and a mounting frame 320. The positioning frame 310 is provided with multiple positioning holes 3111. In a specific setting, the positioning frame 310 includes a base plate 311 and side walls 312 disposed around the base plate 311. The base plate 311 and the side walls 312 form an accommodating space with an open top, and the base plate 311 is also provided with multiple positioning holes 3111 that penetrate the base plate 311 along its thickness.

[0067] There are multiple mounting brackets 320, which are detachably installed in multiple positioning ports 3111. In a specific configuration, the mounting bracket 320 includes a mounting box 321 with a top opening and an extension wall 322 located at the outer edge of the opening of the mounting box 321. The mounting box 321 is located at the base plate 311 corresponding to the positioning port 3111, and the extension wall 322 is located at the side wall 312.

[0068] More specifically, the side wall 312 of the positioning frame 310 has a mounting through hole 3121, and the extension wall 322 of the mounting bracket 320 has a corresponding receiving through hole 3221. The mounting fastener passes through the mounting through hole 3121 and is detachably disposed in the receiving through hole 3221. The mounting fastener can be a bolt, screw, or other components.

[0069] Furthermore, each mounting box 321 has a rectangular cavity structure with an open top. Among the four extension walls 322 corresponding to each mounting box 321, at least one extension wall 322 is connected to the side wall 312 of the positioning frame 310 by multiple mounting fasteners. The number of mounting fasteners corresponding to each extension wall 322 can be 2, 3 or more, and no specific limitation is made here.

[0070] Multiple mounting brackets 320 are used to position multiple COB LED modules 110 in a one-to-one correspondence. In specific settings, the mounting brackets 320 and COB LED modules 110 are arranged in a matrix.

[0071] To ensure the accurate positioning of the mounting bracket 320 on the COB LED module 110, in some embodiments, each mounting bracket 320 is provided with a positioning pin 330, and each COB LED module 110 is provided with a positioning hole corresponding to the positioning pin 330. The positioning pin 330 can be detachably inserted into the positioning hole. In specific configurations, at least two oppositely arranged extension walls 322 in each mounting bracket 320 are provided with multiple positioning pins 330. For example, the number of positioning pins 330 can be 2, 3, 4, 5 or more. It should be noted that the positioning pin 330 of this application is integrally formed into the mounting bracket 320.

[0072] The tolerance of the positioning holes on each COB LED module 110 is ±0.01mm. Each COB LED module 110 is initially positioned by the positioning pin 330, which helps to ensure that the gap between the splicing seams of the COB LED modules 110 does not exceed 0.1mm.

[0073] With the above settings, during actual installation, the mounting bracket 320 is connected to the positioning frame 310 via mounting fasteners; the COB LED module 110 is initially positioned on the mounting bracket 320 via positioning pins 330.

[0074] To ensure that the surface flatness error of each COB LED module 110 does not exceed 0.05 mm / ㎡, in some embodiments, the assembly fixture 20 also includes a flatness detection device and a flatness adjuster 600. The flatness detection device is used to detect the flatness of the display component 100. In specific settings, the flatness detection device can be a level or a laser flatness meter, or both a level and a laser flatness meter can be used simultaneously.

[0075] Each mounting bracket 320 is equipped with at least one flatness adjuster 600. In practice, each mounting bracket 320 may have multiple flatness adjusters 600, specifically two, four, or more. The flatness adjusters 600 are used to adjust the height of the corresponding COB LED module 110. It is easy to understand that multiple flatness adjusters 600 mounted on the same mounting bracket 320 are used to adjust the height of the COB LED module 110 corresponding to that mounting bracket 320. In practice, the height direction of the COB LED module 110 is perpendicular to both the first direction a and the second direction b.

[0076] By adjusting the height of each COB LED module 110 using the flatness adjuster 600, the flatness error of the display component 100 formed by splicing the COB LED modules 110 is ensured to be no more than 0.05 mm / ㎡. When the integrated optical cover plate 200 is attached to the display component 100, it helps to ensure that the horizontal error of the naked-eye 3D display screen 10 does not exceed 0.02 mm / ㎡, reducing light loss and ensuring imaging quality.

[0077] To facilitate the adjustment of the height of the COB LED module 110 using the flatness adjuster 600, in some embodiments, the flatness adjuster 600 includes a connecting rod 610, a support platform 620, and a knob 630. The connecting rod 610 passes through the mounting frame 320 along its thickness direction and is movable relative to the mounting frame 320. The support platform 620 is located at one end of the connecting rod 610, with the side of the support platform 620 away from the connecting rod 610 facing the COB LED module 110. The knob 630 is located at the end of the connecting rod 610 away from the support platform 620, and is located on the side of the mounting frame 320 away from the COB LED module 110.

[0078] In the specific setup, the mounting box 321 has an adjustment area that passes through the positioning port 3111. The connecting rod 610 passes through the adjustment area in the mounting box 321, and the connecting rod 610 can be threaded. With this setup, the knob 630 located at one end of the connecting rod 610 is positioned outside the positioning frame 310 via the positioning port 3111, facilitating operation. Specifically, rotating the knob 630 causes the connecting rod 610 to move up and down relative to the mounting bracket 320, moving the support platform 620 on the connecting rod 610 closer to or further away from the COB LED module 110. When adjusting the height of the COB LED module 110, rotating the knob 630 causes the support platform 620 to abut against the COB LED module 110 and move the COB LED module 110 up and down, without disengaging the COB LED module 110 from the positioning pin 330.

[0079] Once the height of each COB LED module 110 is adjusted, the COB LED module 110 is finally fixed. Specifically, fasteners are inserted through the mounting bracket 320 and fixed to the COB LED module 110. In a specific configuration, the inner cavity of the mounting box 321 is provided with a positioning post 340 located within the adjustment area. A positioning through hole 350 extends through the positioning post 340 and the mounting box 321 along the height direction of the positioning post 340, so that the fasteners can be installed on the COB LED module 110 through the positioning port 3111 and the positioning through hole 350.

[0080] More specifically, the COB LED module 110 has a docking post 111 located in the inner cavity of the mounting box 321 on the side opposite to the optical cover plate 200. The docking post 111 has a locking hole that can be detachably connected to the mounting fastener. The mounting fastener can be a bolt, screw, or other components.

[0081] It should also be noted that the positioning post 340 is also provided with a support hole parallel to the positioning through hole 350. The support hole allows the connecting rod 610 to pass through, ensuring the stability of the connecting rod 610 when it moves up and down.

[0082] Combination Figure 8 As shown, in order to facilitate the installation of the optical cover plate 200 on the second positioning frame 400, in some embodiments, the second positioning frame 400 is provided with a positioning cavity 430, and the assembly fixture 20 also includes an adsorption device (not shown), which is used to adsorb the optical cover plate 200 into or release it from the positioning cavity 430.

[0083] In its specific configuration, the second positioning frame 400 includes a top plate 410 and enclosing sidewalls 420 surrounding the top plate 410. The top plate 410 and the enclosing sidewalls 420 form a positioning cavity 430, and the top plate 410 also has multiple adsorption ports 411 extending through the thickness of the top plate 410. The adsorption device adsorbs the optical cover plate 200 into the positioning cavity 430 through the adsorption ports 411, thereby achieving the initial positioning of the optical cover plate 200. The adsorption device is a vacuum adsorption device, and it is a mature technology, so it will not be elaborated further here.

[0084] In specific operation, the optical cover plate 200 is installed on the second positioning frame 400 through an adsorption device; the second positioning frame 400 is covered by the locking assembly 500 to the first positioning frame 300. In specific settings, there are multiple locking assemblies 500, which can be 8, 16, 32, 35 or more. Figure 3 In the example, guide members 510 of the locking assembly 500 are spaced apart on the side wall 312, and guide holes 520 are spaced apart on the enclosing side wall 420. With the above arrangement, the vertical alignment deviation between the optical cover plate 200 on the second positioning frame 400 and the display assembly 100 on the first positioning frame 300 is within ±10μm.

[0085] To further reduce the alignment deviation between the optical cover plate 200 and the display component 100, and to ensure that the optical cover plate 200 is aligned with the display component 100 on the first positioning frame 300, thereby ensuring that each group of light-emitting pixels, i.e. RGB pixels, can achieve a precise 3D effect through the corresponding microlens, and avoid problems such as color crosstalk, ghosting, uneven brightness, and narrow viewing angle caused by the alignment deviation between the microlens and RGB pixels.

[0086] In some embodiments, the position of the optical cover plate 200 is adjusted based on a COB LED module 110 with a gap between splicing seams not exceeding 0.1 mm and a COB LED module 110 that has undergone leveling adjustment. Specifically, the assembly fixture 20 also includes a control module and a first acquisition module, a second acquisition module, and a fine-tuning device 700 that are communicatively connected to the control module.

[0087] Wherein: the first acquisition module is used to acquire the first position information of each COB LED module 110. In specific settings, the first acquisition module can be an infrared camera 800. Multiple infrared positioning points are set at the center of the edge of each COB LED module 110. The diameter of the infrared positioning points is 0.5mm, so that the infrared camera 800 can acquire the first position information of the COB LED module 110 through the infrared positioning points.

[0088] The second acquisition module is used to acquire the second position information of the optical cover plate 200. In specific settings, the second acquisition module can also be an infrared camera 800. An infrared positioning point is set at the center of the edge of the optical cover plate 200 so that the infrared camera 800 can acquire the second position information of the optical cover plate 200 through the infrared positioning point.

[0089] A fine-tuning device 700 is disposed on the second positioning frame 400. The fine-tuning device 700 is used to adjust the position of the optical cover plate 200 along the first direction a and the second direction b, where the first direction a and the second direction b are perpendicular. It is easy to understand that the optical cover plate 200 is installed on the second positioning frame 400 by a suction device. At this time, the optical cover plate 200 is restricted in the vertical direction by the second positioning frame 400. The optical cover plate 200 is temporarily fixed and can move in a plane perpendicular to the vertical direction. When the second positioning frame 400 is closed to the first positioning frame 300 by the locking assembly 500, the optical cover plate 200 located in the positioning cavity 430 has a certain gap in the vertical direction with the display assembly 100 through the suction device, so that the optical cover plate 200 does not affect the display assembly 100 as a reference when it moves.

[0090] The control module is used to control the fine-tuning device 700 to operate based on the first position information and the second position information. In a specific setting, the control module is a PLC controller. The controller uses the first position information as a reference to control the fine-tuning device 700 to move the optical cover plate 200. The controller calculates the deviation of the second position information relative to the first position information, so that the alignment deviation between the optical cover plate 200 and the display component 100 is adjusted to ±1μm, that is, to ensure that the optical cover plate 200 is completely aligned with the display component 100 in the vertical direction.

[0091] It should also be noted that the number of infrared cameras 800 in this application is multiple to collect the required location information. There is no specific limit to the exact number of infrared cameras 800; the number can be installed according to actual needs. For example, the number of infrared cameras 800 can be 12, 15, 16, or more. In specific installation, the infrared cameras 800 can be mounted on the mounting bracket 320. More specifically, connecting through holes 3112 are provided at the base plate 311 around the positioning port 3111, and the infrared cameras 800 pass through the connecting through holes 3112 and are fixed to the extension wall 322 of the mounting bracket 320.

[0092] With the above settings, the RGB pixels in the integrated optical cover 200 and the display component 100 formed by splicing multiple COB LED modules 110 can be precisely aligned at the micrometer level.

[0093] To ensure that the optical cover plate 200 is aligned and in contact with the display component 100, it is important to note that after the position of the optical cover plate 200 is adjusted by the fine-tuning device 700, optical adhesive, specifically OCA optical adhesive, is applied to the display component 100. At this point, the adsorption device is closed to release the optical cover plate 200, allowing it to fall freely from the positioning cavity 430 onto the optical adhesive on the display component 100, thus completing the bonding between the display component 100 and the optical cover plate 200.

[0094] In order to facilitate the adjustment of the position of the optical cover plate 200 by the fine-tuning device 700 along the first direction a and the second direction b, in some embodiments, the second positioning frame 400 is provided with a plurality of spaced fine-tuning devices 700 along both the first direction a and the second direction b. In a specific configuration, the enclosing sidewall 420 of the second positioning frame 400 is rectangular, and a plurality of spaced fine-tuning devices 700 are provided on all four sides of the enclosing sidewall 420.

[0095] Combination Figure 9 As shown, the fine-tuning device 700 includes a fine-tuning drive 710 disposed on the second positioning frame 400 and a transmission block 720 disposed on the output end of the fine-tuning drive 710. The transmission block 720 is used to abut against the optical cover plate 200. In a specific configuration, the fine-tuning drive 710 can be a linear drive component such as a cylinder or a servo motor. The fine-tuning drive 710 is disposed on the enclosing side wall 420, and the output end of the fine-tuning drive 710 is perpendicular to the enclosing side wall 420 that is fixed to itself. That is, the fine-tuning drives 710 spaced apart along the first direction a are used to drive the optical cover plate 200 to move along the second direction b, and the fine-tuning drives 710 spaced apart along the second direction b are used to drive the optical cover plate 200 to move along the first direction a.

[0096] To prevent damage to the optical cover plate 200, a flexible buffer pad 730 is provided at one end of the transmission block 720 away from the fine-tuning drive 710. The flexible buffer pad 730 is used to abut against and drive the optical cover plate 200 to move. The flexible buffer pad 730 can be made of materials such as rubber or plastic.

[0097] To ensure the stability of the optical cover plate 200 mounted on the second positioning frame 400, the second positioning frame 400 is made of aluminum alloy and is preferably integrally formed. The bending stiffness of the second positioning frame 400 is not less than 1000 N / mm. For example, the bending stiffness of the second positioning frame 400 can specifically be 1100 N / mm, 1200 N / mm, or higher. This ensures that the deformation of the optical cover plate 200 during installation and use does not exceed ±2 μm, ensuring the structural stability of the entire optical cover plate 200 and meeting the requirements of the large-size naked-eye 3D display screen 10.

[0098] After the naked-eye 3D display screen 10 is assembled using the assembly fixture 20, it will be tested. Specifically, the 3D test image of the naked-eye 3D display screen 10 will be activated. For example, the 3D test image can be a stereoscopic panoramic image. The 3D effect parameters of the entire screen will be detected using a 3D parallax analyzer. The specific parameters include ghosting rate, brightness uniformity, and parallax angle. At the same time, the effect of the splicing area will be manually observed. After testing, the ghosting rate of the naked-eye 3D display screen 10 will not exceed 5%, the brightness uniformity will not be less than 95%, and there will be no breaks in the splicing area.

[0099] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0100] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A glasses-free 3D display screen, characterized in that, The naked-eye 3D display screen includes a display component and an integrated optical cover, wherein: An integrated optical cover plate covers the surface of the display component, and the optical cover plate includes a plurality of microlenses arranged in an array; The display component includes multiple COB LED modules arranged in an array, each COB LED module including multiple groups of RGB pixels, and each group of RGB pixels having a one-to-one corresponding microlens.

2. The naked-eye 3D display screen according to claim 1, characterized in that, The optical cover plate has a first region facing each of the COBLED modules, and the microlens in the first region are first microlenses, the array period of the first microlenses being equal to the pixel spacing in the COBLED modules.

3. The naked-eye 3D display screen according to claim 2, characterized in that, The axial direction of the first microlens forms a first angle with the first direction, and the range of the first angle is 5°-15°.

4. The naked-eye 3D display screen according to claim 3, characterized in that, The optical cover plate has a second region that is directly opposite the docking point of two adjacent COB LED modules. The width of the second region along a second direction is greater than the gap between the two adjacent COB LED modules. The second direction is perpendicular to the first direction. The microlens in the second region is a second microlens, and the array period of the second microlens is greater than the array period of the first microlens.

5. The naked-eye 3D display screen according to claim 4, characterized in that, The axis of the second microlens forms a second angle with the first direction, and the second angle is greater than the first angle.

6. The naked-eye 3D display screen according to claim 1, characterized in that, The surface roughness Ra of the optical cover plate is no greater than 5 nm.

7. An assembly fixture for assembling a naked-eye 3D display screen as described in any one of claims 1-6, characterized in that, The assembly fixture includes a first positioning frame, a second positioning frame, and a locking assembly, wherein: The locking assembly includes a guide member and a guide hole. The guide member is disposed on one of the first positioning frame and the second positioning frame, and the guide hole is disposed on the other of the two. The first positioning frame is used to install the display components; The second positioning frame is used to install the optical cover plate; When the second positioning frame covers the first positioning frame, the guide is inserted into the guide hole, and the optical cover plate on the second positioning frame faces the display component that is attached to the first positioning frame.

8. The assembly tooling according to claim 7, characterized in that, The first positioning frame includes a positioning frame and a mounting frame, wherein the positioning frame is provided with multiple positioning ports; The number of mounting brackets is multiple, and the multiple mounting brackets are detachably installed in the multiple positioning ports in a one-to-one correspondence. The multiple mounting brackets are used to position the multiple COB LED modules in a one-to-one correspondence.

9. The assembly tooling according to claim 8, characterized in that, Each mounting bracket is provided with a positioning pin, and the COB LED module is provided with a positioning hole corresponding to the positioning pin. The positioning pin can be detachably inserted into the positioning hole.

10. The assembly tooling according to claim 8, characterized in that, The assembly fixture also includes a flatness detection device and a flatness adjuster. The flatness detection device is used to detect the flatness of the display component. Each mounting bracket is provided with at least one flatness adjuster, which is used to adjust the height of the corresponding COB LED module.

11. The assembly tooling according to claim 10, characterized in that, The flatness adjuster includes a connecting rod, a support platform, and a knob. The connecting rod passes through the mounting frame along the thickness direction of the mounting frame, and the connecting rod is movable relative to the mounting frame. The support platform is disposed at one end of the connecting rod, and the side of the support platform away from the connecting rod faces the COB LED module; The knob is located at the end of the connecting rod away from the support platform, and on the side of the mounting bracket away from the COBLED module.

12. The assembly tooling according to claim 8, characterized in that, Fasteners are inserted through the mounting bracket and fixed to the COB LED module.

13. The assembly tooling according to claim 7, characterized in that, The second positioning frame is provided with a positioning cavity, and the assembly tooling further includes an adsorption device, which is used to adsorb the optical cover plate into or release it from the positioning cavity.

14. The assembly tooling according to claim 13, characterized in that, The assembly fixture also includes a control module and a first acquisition module, a second acquisition module, and a fine-tuning device that are communicatively connected to the control module, wherein: The first acquisition module is used to acquire the first position information of each of the COB LED modules; The second acquisition module is used to acquire the second position information of the optical cover plate; The fine-tuning device is disposed on the second positioning frame, and the fine-tuning device is used to adjust the position of the optical cover plate along the first direction and the second direction, wherein the first direction and the second direction are perpendicular; The control module is used to control the operation of the fine-tuning device based on the first position information and the second position information.

15. The assembly tooling according to claim 14, characterized in that, The second positioning frame is provided with a plurality of fine-tuning devices spaced apart along both the first direction and the second direction; The fine-tuning device includes a fine-tuning drive disposed on the second positioning frame and a transmission block disposed on the output end of the fine-tuning drive, the transmission block being used to abut against the optical cover plate.

16. The assembly tooling according to claim 7, characterized in that, The second positioning frame is made of aluminum alloy, and the bending stiffness of the second positioning frame is not less than 1000 N / mm.

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