An arc-adjustable LED display screen box and an LED display screen

Abstract

This invention relates to the field of LED display technology, specifically to an adjustable-curvature LED display cabinet and an LED display screen. The cabinet includes a cabinet frame and a display module. The cabinet frame includes multiple frame segments arranged sequentially along the width direction, and adjacent frame segments are rotatably connected by a curvature lock, which holds adjacent frame segments at the adjusted bending angle. The display module includes a flexible circuit board and a bottom shell on its back. The bottom shell includes multiple shell segments arranged sequentially along the width direction, and adjacent shell segments are movably connected, allowing the display module to bend with the cabinet frame. The LED display screen is assembled from multiple cabinets, and the bending angle of each cabinet is independently adjustable. This invention enables stepless on-site adjustment of the cabinet curvature, allowing for the assembly of flat, curved, S-shaped, wavy, and annular surfaces.

Description

Technical Field

[0001] This invention relates to the field of LED display technology, specifically to an LED display cabinet with adjustable curvature and an LED display screen. Background Technology

[0002] Rental LED displays are used for temporary setups such as concerts, press conferences, and exhibitions. The cabinets need to be repeatedly disassembled and transported with the performance. Currently, most rental LED displays on the market are flat, rigid cabinets or cabinets with fixed curvature. The cabinet frame is made of rigid aluminum profiles and is integrally formed. The bending angle is determined at the factory and can only support 0° flat splicing, 90° right-angle splicing, and a few fixed curvature arc splicing such as R1m and R2m.

[0003] When setting up a curved screen, rental companies must prepare a variety of fixed-curvature cabinets according to the site requirements, resulting in high inventory and maintenance costs. It is also difficult to create a continuous change in curvature between the fixed-curvature cabinets, making it impossible to create S-shaped, wave-shaped, or circular curved shapes, which limits the freedom of stage design.

[0004] On the other hand, existing display modules generally use rigid circuit boards, and the lamp surface cannot be bent. Even if the cabinet frame has a curvature, the transition between adjacent modules can only be a flat fold line, and the greater the curvature, the more obvious the seam. If the module is forced to bend with the frame, the lamp beads and solder joints will be subjected to hard compression, which can easily lead to lamp bead damage, black screen, dead pixels and other failures.

[0005] It is evident that the existing rental LED display cabinet structure does not support continuous on-site adjustment of curvature, and the display module does not have the ability to bend with curvature. Both of these factors together limit the free splicing of irregularly shaped curved screens. Summary of the Invention

[0006] In order to solve the above-mentioned technical problems, the present invention provides an LED display cabinet with adjustable curvature and an LED display screen. By combining the segmented hinged cabinet frame with the display module that can be bent with the frame, the curvature of a single cabinet can be steplessly adjusted on site. Multiple cabinets can be spliced ​​together to form curved surfaces with different curvatures and irregular curved surface displays.

[0007] This invention is achieved through the following technical solution:

[0008] An adjustable-curvature LED display cabinet includes a cabinet frame and a display module. The display module is mounted on the front of the cabinet frame. The cabinet frame includes multiple frame segments arranged sequentially along the width direction of the cabinet frame. Adjacent frame segments are rotatably connected by a curvature lock, which is used to maintain adjacent frame segments at the adjusted bending angle. The display module includes a flexible circuit board and a bottom shell. The bottom shell is located on the back of the flexible circuit board and includes multiple shell segments arranged sequentially along the width direction. Adjacent shell segments are movably connected, allowing the display module to bend with the cabinet frame.

[0009] Furthermore, the arc lock is equipped with a damping limiting structure. After two adjacent frame segments rotate relative to each other to the target bending angle, the damping limiting structure locks the two adjacent frame segments. The bending angle between two adjacent frame segments can be adjusted from 0° to 45°. The box frame can be steplessly adjusted between a flat state, a forward arc state, and a reverse arc state through each of the arc locks.

[0010] Furthermore, the multiple frame segments include a left segment, a middle segment, and a right segment. The left segment and the middle segment, as well as the middle segment and the right segment, are rotatably connected by the arc locks, and the bending angle of each arc lock is independently adjustable.

[0011] Specifically, the left section, the middle section, and the right section are all aluminum profiles; multiple arc locks are provided between two adjacent frame sections, and the multiple arc locks are arranged at intervals along the height direction of the frame section.

[0012] Preferably, the shell segment is a plastic part, the shell segment extends along the height direction of the box frame, and a deformation allowance is reserved between two adjacent shell segments.

[0013] In some embodiments, there are multiple display modules, which are arranged in an array along the width and height directions of the housing frame, and each display module is detachably connected to the housing frame.

[0014] Preferably, the box frame is provided with a quick-lock assembly, which is used to detachably connect the box frame to adjacent boxes; the quick-lock assembly includes upper and lower quick locks and left and right quick locks, the upper and lower quick locks are provided at the top and bottom of the box frame, and the left and right quick locks are provided at the left and right sides of the box frame; the quick-lock assembly is provided with a pre-positioning structure, which is used to pre-position the splicing position of two adjacent boxes before locking.

[0015] In some embodiments, a control box is provided on the back of the housing frame, and the control box is detachably connected to the housing frame by a latch lock.

[0016] The present invention also provides an LED display screen, comprising a plurality of the aforementioned adjustable-curvature LED display screen cabinets, wherein the plurality of adjustable-curvature LED display screen cabinets are spliced ​​together to form a display surface, and the bending angle of each adjustable-curvature LED display screen cabinet is independently adjustable.

[0017] Furthermore, each of the aforementioned adjustable-curvature LED display cabinets can be independently adjusted and combined with each other in a flat state, a forward-curved state, and a reverse-curved state, so that the display surface is a flat surface, a curved surface, an S-shaped surface, a wavy surface, or a ring-shaped surface.

[0018] This invention, through the combination of a segmented cabinet frame, an arc lock, and a bendable display module, transforms the arc of the rental LED display screen from a factory-fixed shape to on-site stepless adjustment; compared with existing technologies, it has the following advantages:

[0019] The enclosure frame is divided into multiple frame segments. Adjacent frame segments are connected by an arc lock and maintained at the adjusted bending angle. A single enclosure can switch between a flat state, a forward arc state, and a reverse arc state. Multiple enclosures can be spliced ​​together to form arc surfaces with different curvatures, as well as irregular curved surfaces such as S-shaped surfaces, wavy surfaces, and annular surfaces. Rental companies do not need to stock multiple enclosures according to their curvature, reducing inventory and maintenance costs.

[0020] The damping limiting structure inside the arc lock locks adjacent frame segments after adjustment, and the bending angle can be precisely fixed without the need for auxiliary fasteners such as shims, thus suppressing springback deformation after splicing. Attached Figure Description

[0021] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the invention. These drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, but do not constitute a limitation on the embodiments of the present invention.

[0022] Figure 1 An isometric view of an adjustable-radius LED display cabinet provided in an embodiment of the present invention;

[0023] Figure 2 An exploded view of an adjustable-radius LED display cabinet provided in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of a display module provided in an embodiment of the present invention;

[0025] Figure 4 The top view of the adjustable-curvature LED display cabinet provided in the embodiment of the present invention when it is in a flat state.

[0026] Reference numerals: 100-Box body; 1-Box frame; 11-Frame segment; 111-Left segment; 112-Middle segment; 113-Right segment; 2-Display module; 21-Flexible circuit board; 22-Bottom shell; 221-Shell segment; 3-Curved lock; 4-Quick lock assembly; 41-Upper and lower quick locks; 42-Left and right quick locks; 5-Control box; 6-Hook and latch lock; 7-Handle. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0028] It should also be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings.

[0029] Where there is no conflict, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] Example 1

[0031] like Figure 1 and Figure 2 As shown, this embodiment provides an LED display cabinet with adjustable curvature, including a cabinet frame and a display module, with the display module mounted on the front of the cabinet frame.

[0032] The enclosure frame comprises multiple frame segments arranged sequentially along its width. Adjacent segments are connected by a rotatable arc lock. The arc lock maintains the adjusted bending angle between adjacent segments. Adjusting any arc lock causes the corresponding two frame segments to rotate relative to each other around the vertical axis, transforming the front of the enclosure frame from a flat surface to a folded surface. The more frame segments there are, the more folded surfaces there are, and the closer the overall surface is to a continuous arc. The number of frame segments can be two, three, or more. Figure 2 The example shown has three segments; wider boxes can also be configured with four or more segments to achieve a smoother curvature transition.

[0033] The display module includes a flexible circuit board and a bottom shell, with the bottom shell located on the back of the flexible circuit board. The bottom shell comprises multiple shell segments arranged sequentially along its width, with adjacent shell segments movably connected. When the housing frame is bent, each shell segment deflects relative to the others, causing the flexible circuit board to bend smoothly. The display module as a whole conforms to the curvature of the housing frame, and no hard creases appear on the lamp surface. The movable connection between adjacent shell segments can be achieved by relying on the deformation allowance reserved between them, or by providing flexible connecting ribs between adjacent shell segments; in other embodiments, adjacent shell segments can also be hinged.

[0034] The flexible circuit board can use a flexible PCB substrate or a rigid-flex board. The area corresponding to each shell segment is the rigid area, and the area between adjacent shell segments is the flexible area, with bending concentrated in the flexible area. Multiple LEDs are located on the front side of the flexible circuit board. The LEDs use flexible encapsulation; the encapsulating material undergoes slight deformation without cracking when the substrate is bent. Combined with the segmented deflection of the shell segments, the LEDs are not subjected to rigid compression during bending, preventing LED damage, blackouts, and dead pixels.

[0035] Example 2

[0036] This embodiment describes the arc lock and the adjustment of the bending angle based on Embodiment 1.

[0037] The arc lock incorporates a damping limiting structure. After two adjacent frame segments rotate relative to each other to the target bending angle, the damping limiting structure locks the two frame segments in place, eliminating the need for shims or other accessories for fixation and thus suppressing springback deformation after splicing.

[0038] The bending angle between two adjacent frame segments can be adjusted from 0° to 45°, with stepless adjustment within this range. The cabinet frame switches between a flat state, a forward curved state, and a reverse curved state using various arc locks. The bending angle adjustment range can also be designed to other intervals, such as 0° to 30° or 0° to 60°, depending on the cabinet width and the bending capability of the display module.

[0039] The first implementation structure of the arc lock is a friction-damped type: the arc lock includes a fixed base, a rotating arm, and a rotating shaft. The fixed base is connected to one of two adjacent frame segments, and the rotating arm is connected to the other frame segment. The rotating shaft passes through the fixed base and the rotating arm. The damping and limiting structure includes a friction plate assembly and an elastic preload. The friction plate assembly is sleeved on the rotating shaft and clamped between the fixed base and the rotating arm. The elastic preload applies an axial preload to the friction plate assembly. The elastic preload can be a disc spring assembly. When the rotating arm deflects relative to the fixed base, the friction plate assembly provides a damping torque. The damping torque is designed to be greater than the rebound torque after the display module is bent, and it is held after being released from any angle. One of the fixed base and the rotating arm is provided with an arc-shaped limiting groove, and the other is provided with a limiting pin. The limiting pin extends into the arc-shaped limiting groove, and the two ends of the arc-shaped limiting groove correspond to two extreme positions of 0° and 45°, respectively, limiting the adjustment range of the bending angle.

[0040] The second implementation structure of the arc lock is a worm gear type: the damping and limiting structure includes a worm gear and a worm. The worm gear is connected to one of the two adjacent frame segments, and the worm is rotatably mounted on the other frame segment and meshes with the worm gear. The lead angle of the worm is less than the equivalent friction angle of the meshing surface, resulting in self-locking transmission. Reverse torque cannot drive the worm to rotate via the worm gear. Rotating the worm allows for stepless adjustment of the bending angle, and both frame segments remain locked after rotation stops.

[0041] In addition to the two structures mentioned above, the arc lock can also use commercially available locking components such as damping hinges and damping pivots, as long as they can keep the two adjacent frame segments at the target bending angle after adjustment.

[0042] Example 3

[0043] This embodiment describes the segmented arrangement of the box frame based on Embodiment 1.

[0044] like Figure 2 and Figure 4 As shown, the multiple frame segments include a left segment, a middle segment, and a right segment. The left segment and the middle segment, as well as the middle segment and the right segment, are connected by a radii lock.

[0045] The bending angle of each arc lock can be adjusted independently: when the two bending directions are the same, the cabinet forms a forward or reverse arc; when the two bending directions are opposite, a single cabinet forms an S-shaped curvature transition; a mixed state of one bending and another flat can also be set. The three-section division allows a single cabinet to have three basic forms: forward arc, reverse arc, and flat, providing the smallest adjustment unit for irregular splicing of the entire screen.

[0046] The left, middle, and right sections are all made of aluminum profiles. The profile cross-sections are molded to balance strength and weight, meeting the requirements of repeated disassembly and assembly and impact resistance in rental applications. Multiple curved locks are installed between adjacent frame sections, spaced apart along the height of the frame section. For example, one lock can be installed at the top and bottom of the frame section, and more than three locks can be added for taller boxes. This distributes the bending load along the height direction, preventing torsional misalignment of the frame sections.

[0047] Example 4

[0048] This embodiment describes the structure of the shell segment based on Embodiment 1.

[0049] The shell segments are made of plastic and can be injection molded from engineering plastics such as PC and ABS. Each shell segment extends along the height of the box frame, forming a vertical strip. Multiple shell segments are arranged side by side along the width direction, with the segmentation direction consistent with the arrangement direction of the frame segments. When bent, each shell segment deflects relative to the vertical direction, matching the bending method of the box frame. The number of shell segments can be from 4 to 8.

[0050] Deformation allowance is reserved between adjacent shell sections. When bending, the gap is compressed or stretched, and the deformation is absorbed by the gaps between the sections. The local strain at any point on the flexible circuit board is small, and the solder joints of the LED beads are not subject to concentrated stress. Compared with the metal shell, the plastic base shell has lower rigidity, allows for slight deformation, and can also buffer and absorb energy during impacts, making it suitable for the frequent loading and unloading of rental screens.

[0051] In addition, such as Figures 1 to 3As shown, there are multiple display modules arranged in an array along the width and height of the cabinet frame, for example, in a 2x2 row and 2x2 column configuration. Each display module is detachably connected to the cabinet frame, for example, by magnetic attachment to the front of the frame section or by fasteners such as screws. The display modules are standardized, with uniform specifications and interchangeability. If a single display module is damaged, it can be replaced individually on-site, eliminating the need for repackaging the entire cabinet.

[0052] Example 5

[0053] This embodiment describes the relevant structure of the box based on Embodiment 1.

[0054] like Figure 2 and Figure 4 As shown, the box frame is equipped with a quick-lock assembly, which is used to detachably connect the box frame to the adjacent box.

[0055] The quick-lock assembly includes top and bottom quick-locks and left and right quick-locks. The top and bottom quick-locks are located at the top and bottom of the cabinet frame and are used to connect with the cabinets above and below. The left and right quick-locks are located on the left and right sides of the cabinet frame and are used to connect with the cabinets on the left and right.

[0056] The quick-lock assembly features a pre-positioning structure. This structure pre-positions the joints of two adjacent enclosures before locking. For example, it uses a pair of interlocking guide pins and guide holes. During assembly, the guide pins are first inserted into the guide holes, constraining the relative positions of the two enclosures before the quick-lock is engaged. Alternatively, the pre-positioning structure can use a positioning boss and a positioning groove. This pre-positioning followed by locking process reduces alignment time and prevents misalignment and potential damage to the lamp face during locking.

[0057] like Figure 2 As shown, a control box is located on the back of the enclosure frame, and the control box is detachably connected to the enclosure frame via a latch. The control box integrates a receiver card and power supply, and provides external power and signal interfaces. Adjacent enclosures are cascaded via cables. Once the latch is opened, the control box can be removed entirely, allowing for on-site maintenance or replacement without disassembling the enclosure frame.

[0058] A handle is provided on the back of the middle section, making it easy for a single person to carry and align the parts.

[0059] Example 6

[0060] This embodiment describes an LED display screen using the aforementioned housing.

[0061] The LED display screen consists of multiple LED display cabinets with adjustable curvature. These cabinets are spliced ​​together in the vertical and horizontal directions using quick-locking components to form the display surface. The bending angle of each cabinet can be adjusted independently, and setting the same bending state for cabinets in the same row ensures vertical seam alignment.

[0062] Each cabinet can be independently adjusted and combined with others in a flat, forward-curved, and reverse-curved state, resulting in different shapes for the display surface.

[0063] When all the cabinets are laid flat, the display surface is a plane;

[0064] When all the cabinets are set to an arc shape in the same direction and at the same angle, the display surface is an arc surface with a fixed curvature. When the bending angle is increased and the number of splices is sufficient, it can be closed into a ring surface.

[0065] The bending angle of each cabinet changes gradually along the width direction, and the display surface is an arc-shaped surface with continuously changing curvature;

[0066] When forward and reverse arcs are alternately set, the display surface appears as an S-shaped or wavy surface.

[0067] The curvature of the entire screen does not depend on a custom cabinet; it is all achieved through on-site adjustments.

[0068] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0069] Furthermore, the terms "first" and "second" are used 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 as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0070] Those skilled in the art should understand that the above embodiments are merely for illustrating the present invention and are not intended to limit the scope of the invention. Those skilled in the art can make other changes or modifications based on the above invention, and these changes or modifications still fall within the scope of the present invention.

Claims

1. An LED display cabinet with adjustable curvature, characterized in that, It includes a housing frame and a display module, wherein the display module is mounted on the front of the housing frame; The box frame includes multiple frame segments, which are arranged sequentially along the width direction of the box frame. Adjacent frame segments are rotatably connected by an arc lock, which holds the adjacent frame segments at the adjusted bending angle. The display module includes a flexible circuit board and a bottom shell. The bottom shell is disposed on the back of the flexible circuit board and includes multiple shell segments arranged sequentially along the width direction. Adjacent shell segments are movably connected.

2. The adjustable-radius LED display cabinet according to claim 1, characterized in that, The arc lock is equipped with a damping limiting structure. After two adjacent frame segments rotate relative to each other to the target bending angle, the damping limiting structure locks the two adjacent frame segments. The bending angle between two adjacent frame segments can be adjusted from 0° to 45°, and the box frame can be infinitely adjusted between a flat state, a forward arc state, and a reverse arc state by each of the arc locks.

3. The adjustable-radius LED display cabinet according to claim 1, characterized in that, The frame segments include a left segment, a middle segment, and a right segment. The left segment and the middle segment, as well as the middle segment and the right segment, are rotatably connected by the arc locks. The bending angle of each arc lock is independently adjustable.

4. The adjustable-radius LED display cabinet according to claim 3, characterized in that, The left section, the middle section, and the right section are all aluminum profile parts; Multiple arc locks are provided between two adjacent frame segments, and the multiple arc locks are arranged at intervals along the height direction of the frame segments.

5. The adjustable-radius LED display cabinet according to claim 1, characterized in that, The shell segment is a plastic part, and the shell segment extends along the height direction of the box frame, with a deformation allowance reserved between two adjacent shell segments.

6. The adjustable-radius LED display cabinet according to claim 1, characterized in that, The display modules are multiple, and the multiple display modules are arranged in an array along the width and height directions of the housing frame. Each display module is detachably connected to the housing frame.

7. The adjustable-radius LED display cabinet according to claim 6, characterized in that, The adjacent housing frames are detachably connected by a quick-lock assembly; The quick-lock assembly includes top and bottom quick-locks and left and right quick-locks. The top and bottom quick-locks are located at the top and bottom of the housing frame, and the left and right quick-locks are located on the left and right sides of the housing frame. The quick-lock assembly is equipped with a pre-positioning structure, which is used to pre-position the splicing position of two adjacent boxes before locking.

8. The adjustable-radius LED display cabinet according to claim 1, characterized in that, A control box is located on the back of the enclosure frame, and the control box is detachably connected to the enclosure frame via a snap lock.

9. An LED display screen, characterized in that, The device includes multiple LED display cabinets with adjustable curvature according to any one of claims 1 to 8, wherein the multiple LED display cabinets with adjustable curvature are spliced ​​together to form a display surface, and the bending angle of each LED display cabinet with adjustable curvature is independently adjustable.

10. The LED display screen according to claim 9, characterized in that, Each of the aforementioned adjustable-curvature LED display cabinets can be independently adjusted and combined with each other in a flat state, a forward-curved state, and a reverse-curved state. The display surface can be a flat surface, an arc surface, an S-shaped surface, a wavy surface, or a ring surface.

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