Flexible curved surface LED display screen and processing technology thereof
Through the design of flexible base shell, reinforcing net and elastic protrusions, the problem of uneven force in flexible curved LED display is solved, higher display flatness and connection stability are achieved, the risk of failure is reduced, and it has good heat dissipation and detachability.
Patent Information
- Application Number
- CN202511051663.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-29
- Publication Date
- 2025-10-17
AI Technical Summary
In existing flexible curved LED displays, uneven force on the printed circuit board causes excessive bending angles, resulting in poor flatness and even pin breakage.
It adopts a flexible base shell and reinforced net structure, combined with elastic protrusions and positioning parts, and protects the LED lamp beads and conductive circuits through encapsulation protective colloid. The reinforced net and elastic protrusions are used to make the flexible circuit board evenly stressed. Avoidance holes are set to avoid the driver chip and connector. The bending structure and inflation function are used to maintain the flatness and stability of the display.
It effectively reduces the risk of breakage of conductive circuits and driver chip pins, improves the display effect and connection stability of the display, and has good heat dissipation performance and detachability.
Smart Images
Figure CN120808680A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of LED display screen, in particular to a flexible curved LED display screen and a processing technology thereof. BACKGROUND
[0002] In order to meet the three-dimensional feeling of the LED display screen, a flexible curved LED display screen is proposed. The flexible curved LED display screen also uses arrayed LED lamp beads as display units, and the use effect is better when it is bent to a curved surface.
[0003] The flexible curved LED display screen has a unique bendable design, so that they can be bent at a certain angle without being damaged. This feature makes them mainly used in some special occasions such as cylindrical, semicircular, elliptical, exhibition hall, shopping mall, etc. Unlike ordinary LED display screens, the flexible curved LED display screen uses a flexible printed circuit board as a substrate, and a flexible base shell made of special silicone or rubber material, so that it has excellent bending performance.
[0004] However, the flexible curved LED display screen in the prior art still has the following disadvantages: due to the existence of hard devices such as LED lamp beads, driving chips and connectors, when the printed circuit board is bent under stress, uneven stress will occur, resulting in excessive bending angle in some positions. In the long run, not only will the flatness of the printed circuit board be poor, reducing the user experience, but also the driving lines and even the pins of the driving chip on the printed circuit board will be broken in severe cases. SUMMARY
[0005] To solve the defects in the prior art, the present application provides a flexible curved LED display screen and a processing technology thereof.
[0006] To solve the above technical problems, the present application provides the following technical solutions: The flexible curved LED display screen of the present application comprises an arc-shaped shell and a flexible display module arranged in the arc-shaped shell. The flexible display module comprises a flexible glass layer, a flexible base shell and an LED display assembly. The LED display assembly is bonded to the flexible base shell. The LED display assembly comprises a flexible circuit board, a plurality of LED lamp beads attached to the front of the flexible circuit board and an encapsulation protective glue body. The flexible circuit board is provided with conductive lines electrically connected with the LED lamp beads. The encapsulation protective glue body is coated on the outside of the flexible circuit board to protect the LED lamp beads and the conductive lines. The encapsulation protective glue body is bonded with the flexible glass layer on the front surface, and is provided with a positioning member on the back surface. The flexible base shell is provided with an injection groove on the front surface, and the injection groove is provided with an elastic protrusion matched with the positioning member. The elastic protrusion is provided with an air cavity, and the flexible base shell is provided with a reinforcing net for supporting the LED display assembly.
[0007] As a preferred technical scheme of the present application, the positioning member is composed of a base, two inner forming parts, an outer forming part and a connecting part for connecting the inner forming parts and the outer forming part, a positioning groove matched with the elastic protrusion is formed between the two inner forming parts, a glue overflow port is formed between the outer forming part far from the connecting part and the wall of the glue injection groove, an anti-glue overflow groove is formed between the inner forming part, the connecting part and the outer forming part, a glue containing cavity is formed between the base and the elastic protrusion, and a glue injection hole is formed in the base and communicates with the glue containing cavity.
[0008] As a preferred technical scheme of the present application, the flexible base shell is provided with an inflation hole for mounting a plugging member or an inflation member, and the inflation hole is connected with the air cavity through an air guide path.
[0009] As a preferred technical scheme of the present application, the flexible base shell is provided with a curved structure on the back surface, the curved structure is in a wave shape, and the curved structure is composed of at least two deformation bodies arranged in a spaced manner.
[0010] As a preferred technical scheme of the present application, the flexible base shell is further provided with a plurality of fixing holes on the back surface, a connecting member is mounted in the fixing hole, and the flexible base shell is detachably connected with the arc-shaped shell through the connecting member.
[0011] As a preferred technical scheme of the present application, the LED display assembly further comprises a plurality of driving chips and connectors electrically connected with the driving chips, the driving chips and the connectors are attached to the back surface of the flexible circuit board, the driving chips are electrically connected with the LED lamp beads through conductive lines, and the pins of the driving chips are protected by a packaging protective glue.
[0012] As a preferred technical scheme of the present application, the reinforcing net is provided with a plurality of avoidance ports for avoiding the driving chips and the connectors.
[0013] As a preferred technical scheme of the present application, the arc-shaped shell comprises an end shell and a main shell, the end shell is detachably mounted on the top of the main shell, a plurality of heat dissipation holes are formed in the main shell, and a plurality of reserved holes for mounting a data interface and a power interface are formed in the main shell.
[0014] The flexible curved surface LED display screen processing technology is used for processing the flexible curved surface LED display screen, and the specific steps are as follows: S1: cleaning, removing impurities on the surface of the flexible circuit board; S2: attaching, using SMT patch technology to attach the LED lamp beads to the front surface of the flexible circuit board, and then attaching the driving chips and the connectors to the back surface of the flexible circuit board; S3: testing, aging test is performed on the flexible circuit board after SMT patch processing. S4: packaging, sending the flexible circuit board that passes the aging test into an injection mold, packaging the flexible circuit board by injection molding technology to form an LED display assembly; S5: assembling and performing finished product inspection, first assembling the LED display assembly, the flexible base shell and the flexible glass layer together to form a flexible display module, then assembling the flexible display module and the arc-shaped shell together to form a flexible curved LED display screen, and finally performing finished product inspection.
[0015] The beneficial effects of the present application are: 1. The flexible curved LED display screen and the processing technology thereof, through the flexible base shell, the reinforcing net arranged on the flexible base shell and the inflated elastic protrusions, the flexible circuit board can be uniformly stressed, the local stress concentration is reduced, thereby being conducive to maintaining the flatness of the flexible circuit board, ensuring the display effect of the display screen, reducing the probability of fracture of the conductive circuit and the driving chip pin, and the inflated elastic protrusions are conducive to the recovery of the flexible base shell to the initial state, and the positioning of the LED display assembly and the flexible base shell is realized by the positioning member and the elastic protrusions, so that the LED display assembly and the flexible base shell can be quickly assembled together.
[0016] 2. The flexible curved LED display screen and the processing technology thereof, the LED display assembly is attached to the flexible base shell, the glue flows into the anti-glue overflow groove from the glue overflow port under the extrusion of the positioning member, and then flows into the glue containing cavity from the glue inlet hole, the glue is contained by the arranged anti-glue overflow groove and the glue containing cavity, which can effectively prevent the glue from overflowing, and after the glue in the glue containing cavity solidifies, the connection between the LED display assembly and the flexible base shell is strengthened, and the stability of the connection between the LED display assembly and the flexible base shell is further improved.
[0017] 3. The flexible curved LED display screen and the processing technology thereof, the reinforcing net is arranged to facilitate heat dissipation, the driving chip and the connector are avoided by arranging the avoiding port on the reinforcing net, which can prevent the driving chip and the connector from hindering the assembly of the LED display assembly and the flexible base shell. DETAILED DESCRIPTION
[0018] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, together with the embodiments of the present application, to explain the present application, and do not constitute a limitation on the present application. In the drawings: Figure 1 is a structural schematic view of the flexible curved LED display screen of the present application; Figure 2 is a front structure schematic view of the flexible display module of the flexible curved LED display screen of the present application; Figure 3 is a back structure schematic view of the flexible display module of the flexible curved LED display screen of the present application; Figure 4is an exploded view of the flexible display module of the flexible curved LED display screen of the present application; Figure 5 is a structural schematic diagram of the LED display assembly of the flexible curved LED display screen of the present application; Figure 6 is a sectional view of the LED display assembly of the flexible curved LED display screen of the present application; Figure 7 is a structural schematic diagram of the flexible base shell of the flexible curved LED display screen of the present application; Figure 8 is a three-dimensional sectional view of the flexible base shell and the positioning member of the flexible curved LED display screen of the present application; Figure 9 is a structural schematic diagram of the flexible curved LED display screen of the present application; Figure 8 is an enlarged view of A in the above figure; Figure 10 is a process flow chart of the processing technology of the flexible curved LED display screen of the present application.
[0019] In the figure: 1, end shell; 2, main shell; 3, flexible display module; 4, flexible glass layer; 5, flexible base shell; 51, inflation hole; 52, deformation body; 53, reinforcing net; 54, avoiding port; 55, glue injection groove; 56, elastic protrusion; 57, air guide path; 6, connecting member; 7, LED display assembly; 71, flexible circuit board; 72, LED lamp bead; 73, conductive circuit; 74, encapsulation protective glue; 75, positioning member; 751, base; 752, inner forming part; 753, outer forming part; 754, glue inlet hole; 76, driving chip; 77, connector. DETAILED DESCRIPTION
[0020] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.
[0021] Embodiment: as Figures 1-6 and Figure 9As shown, the flexible curved LED display screen of the present application comprises an arc-shaped shell and a flexible display module 3 arranged in the arc-shaped shell, the flexible display module 3 comprises a flexible glass layer 4, a flexible base shell 5 and an LED display assembly 7, the LED display assembly 7 is bonded on the flexible base shell 5, the LED display assembly 7 comprises a flexible circuit board 71, a plurality of LED lamp beads 72 attached to the front of the flexible circuit board 71 and an encapsulation protective glue body 74, the flexible circuit board 71 is provided with conductive lines 73 electrically connected with the LED lamp beads 72, the encapsulation protective glue body 74 is covered on the outside of the flexible circuit board 71, the LED lamp beads 72 and the conductive lines 73 are protected by the encapsulation protective glue body 74, the flexible glass layer 4 is bonded on the front of the encapsulation protective glue body 74, and the back of the encapsulation protective glue body 74 is provided with a positioning member 75. The flexible base shell 5 is provided with a glue injection groove 55 on the front, the glue injection groove 55 is provided with an elastic protrusion 56 matched with the positioning member 75, the elastic protrusion 56 is provided with an air cavity, and the flexible base shell 5 is provided with a reinforcing net 53 for supporting the LED display assembly 7, the reinforcing net 53 can be integrally formed with the flexible base shell 5, the reinforcing net 53 can not only support the LED display assembly 7, but also be conducive to heat dissipation, in addition, the reinforcing net 53 can be internally provided with metal wires to improve the strength and supporting capacity of the reinforcing net 53, the reinforcing net 53 and the inflated elastic protrusion 56 can make the flexible circuit board 71 curved due to stress evenly stressed, thereby being conducive to maintaining the flatness of the flexible circuit board 71, ensuring the display effect of the display screen, reducing the probability of fracture of the conductive lines 73 and the pins of the driving chip 76, and the inflated elastic protrusion 56 is conducive to the recovery of the flexible base shell 5 to the initial state.
[0022] In the embodiment, the encapsulation protective glue body 74 can be a material such as silica gel or rubber, which plays a role of waterproofing and dustproofing.
[0023] As shown in FIGS. Figure 5 , Figure 8 and Figure 9 , the positioning member 75 is composed of a base 751, two inner shaped portions 752, an outer shaped portion 753 and a connecting portion for connecting the inner shaped portions 752 and the outer shaped portion 753, the two inner shaped portions 752 form a positioning groove matched with the elastic protrusion 56, the outer shaped portion 753 forms a glue overflow port between the end away from the connecting portion and the groove wall of the glue injection groove 55, the inner shaped portions 752, the connecting portion and the outer shaped portion 753 form a glue overflow prevention groove, the base 751 and the elastic protrusion 56 form a glue containing cavity, and the base 751 is provided with a glue injection hole 754 communicating with the glue containing cavity.
[0024] The LED display assembly 7 is pasted on the flexible base shell 5 by positioning with the positioning groove and the elastic protrusion 56. The glue flows into the anti-glue overflow groove from the glue overflow port under the extrusion of the positioning member 75, and then flows into the glue containing cavity from the glue inlet hole 754. The glue is contained in the anti-glue overflow groove and the glue containing cavity, which can effectively prevent the glue from overflowing. After the glue in the glue containing cavity solidifies, the connection between the LED display assembly 7 and the flexible base shell 5 is strengthened, and the stability of the connection between the LED display assembly 7 and the flexible base shell 5 is further improved.
[0025] As shown in Figure 2 and Figure 9 , the flexible base shell 5 is provided with an inflation hole 51 for installing a plugging member or an inflation member. The inflation hole 51 is connected with the air cavity through the air guide path 57, and can be directly inflated through the inflation hole 51. After inflation, the plugging member is used to plug. The inflation member that can communicate with the air guide path 57 can also be installed in the inflation hole 51, such as a valve core, which can ensure that the gas only enters but does not exit as a one-way valve.
[0026] As shown in Figure 2 and Figure 3 , the back of the flexible base shell 5 is provided with a curved structure. The curved structure is wave-shaped, and the curved structure is composed of at least two deformation bodies 52 arranged in a spaced manner. When the flexible base shell 5 is bent under stress, the deformation body 52 deforms, so that the flexible base shell 5 can deform flexibly, reduce local stress concentration, and make the LED display assembly 7 more uniform under stress.
[0027] As shown in Figure 3 , the back of the flexible base shell 5 is also provided with a plurality of fixing holes, and the fixing holes are provided with connecting members 6. The flexible base shell 5 is detachably connected with the arc-shaped shell through the connecting members 6. The connecting members 6 can be magnets or inner threaded sleeves and other detachable connecting structures. When the connecting members 6 are magnets, magnetic attraction members that can be attracted by the magnets are arranged in the arc-shaped shell to realize the detachable connection of the flexible base shell 5 and the arc-shaped shell. When the connecting members 6 are inner threaded sleeves, fastening bolts that are screwed with the inner threaded sleeves are used to complete the detachable connection of the flexible base shell 5 and the arc-shaped shell. Magnets and inner threaded sleeves can also be used simultaneously. For example, the flexible base shell 5 is positioned by the magnets, and then the flexible base shell 5 is detachably connected with the arc-shaped shell by the threaded connection of the inner threaded sleeves and the fastening bolts.
[0028] As shown in Figure 3 and Figure 5As shown, the LED display assembly 7 further comprises a plurality of driving chips 76 and connectors 77 electrically connected with the driving chips 76, the driving chips 76 and the connectors 77 are attached to the back of the flexible circuit board 71, the driving chips 76 are electrically connected with the LED lamp beads 72 through the conductive circuit 73, the pins of the driving chips 76 are protected by the encapsulation protective glue 74, the driving chips 76 are electrically connected with the power supply and the data interface through the connectors 77, and the LED lamp beads 72 are controlled to work through the driving chips 76.
[0029] As shown in Figure 3 , Figure 4 and Figure 7 , the reinforcing net 53 is reserved with a plurality of avoiding openings 54 for avoiding the driving chips 76 and the connectors 77, the avoiding openings 54 are arranged for avoiding the driving chips 76 and the connectors 77, which can prevent the driving chips 76 and the connectors 77 from hindering the assembly of the LED display assembly 7 and the flexible base shell 5.
[0030] As shown in Figure 1 , the arc-shaped shell comprises an end shell 1 and a main shell 2, the end shell 1 is detachably mounted on the top of the main shell 2, a plurality of heat dissipation holes are arranged on the main shell 2, and a reserved hole for mounting the data interface and the power supply interface is arranged on the main shell 2, the flexible display module 3 is supported by the arc-shaped shell, and the flexible display module 3 is bent to form a curved surface, and the heat dissipation holes are arranged for heat dissipation.
[0031] The flexible curved surface LED display screen processing technology is used for processing the above-mentioned flexible curved surface LED display screen, and the specific steps are as follows: S1: cleaning, removing impurities on the surface of the flexible circuit board 71; S2: attaching, using SMT patch technology to attach the LED lamp beads 72 to the front of the flexible circuit board 71, and then attaching the driving chips 76 and the connectors 77 to the back of the flexible circuit board 71; S3: testing, aging test is performed on the flexible circuit board 71 after SMT patch processing; S4: encapsulation, the flexible circuit board 71 that passes the aging test is sent into an injection mold, and the flexible circuit board 71 is encapsulated to form the LED display assembly 7 through injection molding technology; S5: assembling and performing finished product inspection, the LED display assembly 7, the flexible base shell 5 and the flexible glass layer 4 are assembled together to form the flexible display module 3, the flexible display module 3 is assembled with the arc-shaped shell to form the flexible curved surface LED display screen, and finally the finished product inspection is performed.
[0032] In operation, after the flexible circuit board 71 is cleaned, the LED lamp beads 72, the driving chip 76 and the connector 77 are attached to the flexible circuit board 71, and after aging test, the flexible circuit board 71 is encapsulated, waterproof and dustproof protection is performed by using the encapsulation protective glue 74, then an appropriate amount of glue is injected into the glue injection groove 55 on the flexible base shell 5, the positioning groove and the elastic protrusion 56 are used for positioning, the LED display assembly 7 is attached to the flexible base shell 5, the glue is extruded by the positioning member 75 and flows into the anti-glue overflow groove from the glue overflow port, then flows into the glue containing cavity from the glue inlet hole 754, the anti-glue overflow groove and the glue containing cavity are arranged to contain the glue, and after the glue in the glue containing cavity is solidified, the connection between the LED display assembly 7 and the flexible base shell 5 is strengthened, then the flexible glass layer 4 is attached, the assembly of the flexible display module 3 is completed, then the flexible display module 3 is bent into an arc shape, and the flexible display module 3 bent into an arc shape is assembled with the arc-shaped shell, the reinforcing net 53 and the inflated elastic protrusion 56 are arranged to make the flexible circuit board 71 bent into an arc shape bear stress uniformly and reduce local stress concentration.
[0033] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing detailed description of the present application is made with reference to the foregoing embodiments, for those skilled in the art, it still can be modified, or equivalent replacement of part of the technical features described in the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. Flexible curved LED display, characterized by: include: An arc-shaped housing and a flexible display module (3) disposed in the arc-shaped housing, the flexible display module (3) comprising a flexible glass layer (4), a flexible base housing (5) and an LED display assembly (7), the LED display assembly (7) being bonded to the flexible base housing (5), the LED display assembly (7) comprising a flexible circuit board (71), a plurality of LED lamp beads (72) attached to the front of the flexible circuit board (71) and an encapsulation protective colloid (74), the flexible circuit board (71) being provided with a conductive circuit (73) electrically connected to the LED lamp beads (72), the encapsulation protective colloid (74) being coated on the outside of the flexible circuit board (71), and the LED lamp beads (72) and the conductive circuit (73) being protected by the encapsulation protective colloid (74), the front of the encapsulation protective colloid (74) being bonded with the flexible glass layer (4), and the back of the encapsulation protective colloid (74) being provided with a positioning member (75); The front surface of the flexible base shell (5) is provided with a glue injection groove (55), the glue injection groove (55) is provided with an elastic protrusion (56) that cooperates with the positioning member (75), the elastic protrusion (56) is provided with an air cavity, and the flexible base shell (5) is provided with a reinforcement net (53) for supporting the LED display assembly (7).
2. The flexible curved LED display screen according to claim 1, characterized in that: The positioning member (75) is composed of a base (751), two inner molding parts (752), an outer molding part (753) and a connecting part for connecting the inner molding parts (752) and the outer molding part (753). A positioning groove matching the elastic protrusion (56) is formed between the two inner molding parts (752). A glue overflow port is formed between the end of the outer molding part (753) away from the connecting part and the wall of the glue injection groove (55). An anti-glue overflow groove is formed between the inner molding parts (752), the connecting part and the outer molding part (753). A glue containing cavity is formed between the base (751) and the elastic protrusion (56). A glue inlet hole (754) communicating with the glue containing cavity is provided on the base (751).
3. The flexible curved LED display screen according to claim 1, characterized in that: The flexible base shell (5) is provided with an inflation hole (51) for installing a blocking piece or an inflation piece, and the inflation hole (51) is connected to the air cavity via an air guide path (57).
4. The flexible curved LED display screen according to claim 1, characterized in that: The back side of the flexible base shell (5) is provided with a curved structure, the curved structure is wavy, and the curved structure is composed of at least two deformation bodies (52) arranged in an interval manner.
5. The flexible curved LED display screen according to claim 1, characterized in that: The back of the flexible base shell (5) is also provided with a plurality of fixing holes, and connecting pieces (6) are installed in the fixing holes. The flexible base shell (5) is detachably connected to the arc-shaped outer shell via the connecting pieces (6).
6. The flexible curved LED display screen according to claim 1, characterized in that: The LED display assembly (7) further comprises a plurality of driver chips (76) and connectors (77) electrically connected to the driver chips (76). The driver chips (76) and the connectors (77) are both mounted on the back of the flexible circuit board (71). The driver chips (76) are electrically connected to the LED lamp beads (72) via conductive circuits (73). The pins of the driver chips (76) are protected by a packaging protective colloid (74).
7. The flexible curved LED display screen according to claim 6, characterized in that: A plurality of avoidance openings (54) are reserved on the reinforcing net (53), and the avoidance openings (54) are used to avoid the driving chip (76) and the connector (77).
8. The flexible curved LED display screen according to claim 1, characterized in that: The arc-shaped housing comprises an end housing (1) and a main housing (2); the end housing (1) is detachably mounted on the top of the main housing (2); a plurality of heat dissipation holes are provided on the main housing (2); and reserved holes for mounting a data interface and a power interface are provided on the main housing (2).
9. A process for manufacturing a flexible curved LED display screen, for manufacturing the flexible curved LED display screen according to any one of claims 1 to 8, characterized in that: The specific steps are as follows: S1: Cleaning, removing impurities on the surface of the flexible circuit board (71); S2: Mounting, using SMT technology to mount the LED lamp bead (72) on the front of the flexible circuit board (71), and then mount the driver chip (76) and the connector (77) on the back of the flexible circuit board (71); S3: Testing, performing an aging test on the flexible circuit board (71) that has completed the SMT patch processing; S4: packaging, feeding the flexible circuit board (71) that has passed the aging test into an injection mold, and packaging the flexible circuit board (71) through injection molding technology to form an LED display component (7); S5: Assembling and inspecting the finished product, first assembling the LED display component (7), the flexible base shell (5) and the flexible glass layer (4) together to form a flexible display module (3), then assembling the flexible display module (3) and the curved shell together to form a flexible curved LED display screen, and finally inspecting the finished product.