Narrow-frame COB (Chip On Board) integrated circular display screen

Abstract

The utility model provides a narrow frame COB integrated round display screen which comprises an installation base, a first module, a second module and an annular frame, the modules are spliced through short edges, the modules located at the opposite angles are cut to form cut modules, and the annular frame wraps the edges of all the modules. Standardized mounting positions are arranged in the mounting bases, and quick replacement of the single modules is supported. The internal heat dissipation through holes are combined with the heat conduction silica gel, the I P65 protection grade is achieved, and the narrow frame fixing module and the frame are integrally designed. The height of the supporting rod is adjustable to adapt to different installation scenes. Through combination of modules with different sizes, the utilization rate of the modules is increased from 68% to 81% or above, and the width of the frame is remarkably reduced, so that the overall display effect of the display screen is improved. The annular frame and silica gel sealing technology prolongs the standard reaching time of a salt spray test by 3 times, and the structural reliability is enhanced. The independent installation position design reduces the maintenance cost, and is suitable for exhibition display, advertisement media and other scenes.

Description

Technical Field

[0001] This utility model relates to the field of display technology, specifically to a narrow-bezel circular display screen based on COB (Chip on Board) packaging technology. Background Technology

[0002] Currently, most COB circular displays on the market suffer from excessively wide bezels. This is primarily due to the uniform and relatively large size of traditional COB modules, resulting in redundant bezel areas after splicing. Existing technologies attempt to reduce bezel size by shrinking individual modules, but are limited by the following technological bottlenecks:

[0003] COB modules use a rigid PCB substrate for packaging, with LED chips, gold wires, and epoxy resin forming an integrated structure. Cutting them is costly and they cannot be directly cut into a circle. Forced cutting can lead to circuit breakage, chip detachment, and damage to the seal, and requires redesigning the entire circumferential trace, resulting in high costs and low reliability.

[0004] Existing COB production equipment is based on rectangular substrates. Circular modules require customized molds and processes, increasing unit cost by 5-10 times and making mass production feasible.

[0005] Currently, the market uses single-size COB modules for splicing. During splicing, part of the display screen needs to be cut off. The utilization rate of the cut display screen is usually around 68%, with serious pixel waste in the edge area and extremely large bezels.

[0006] To address this issue, a narrow-bezel COB integrated circular display screen is proposed. Utility Model Content

[0007] The inch-by-inch module splicing and ring-shaped bezel design solve the problems of excessively wide bezels and low module utilization in traditional COB circular displays.

[0008] This utility model provides a narrow-bezel COB integrated circular display screen, specifically including a mounting base, a first module, a second module, and a ring-shaped frame. The first and second modules are of different sizes and are assembled from several pieces to form a display screen with the same overall length and width, which is then mounted and fixed on the mounting base. The first and second modules, located diagonally, are cut to form a first cut module and a second cut module. The frame surrounds the edges of the first module, the second module, the first cut module, and the second cut module. This technical solution effectively improves module utilization and reduces material waste through the splicing of modules with different sizes; the ring-shaped frame surrounds the edges of all modules, enhancing structural sealing and avoiding the risk of chips falling off the cut edges, thus achieving integration.

[0009] Furthermore, the mounting base has several mounting positions, where the first module, second module, first cutting module, and second cutting module are fixed. The frame is fixed to the edge of the mounting base. The mounting positions of the mounting base enable standardized positioning of the modules, and the fixed frame to the edge of the mounting base forms a rigid frame structure, improving seismic performance. The independent mounting position design supports quick replacement of single modules, reducing maintenance costs.

[0010] Furthermore, it also includes a support rod and a base. The support rod is located between the mounting base and the base, and its height is adjustable to adapt to different installation scenarios.

[0011] Furthermore, the aspect ratio of the first module is 9:7, and the aspect ratio of the second module is 12:7, with the short side of the first module connecting to the short side of the second module. This specific aspect ratio reduces the number of cuts, lowers cutting costs, and effectively improves module utilization.

[0012] Specifically, there is one unit for both the first module and the second module; and two units for both the first cutting module and the second cutting module, achieving a symmetrical distribution around the circumference and eliminating distortion in the display area.

[0013] Even better, the mounting base has internal heat dissipation holes, and the frame is bonded to the edge of the module with thermally conductive silicone. The heat dissipation holes, together with the thermally conductive silicone, reduce the junction temperature of the module by 15-20℃, extending the life of the display screen. The thermally conductive silicone also has the functions of bonding and sealing, and the protection level reaches IP65.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] Narrow bezel design: The bezel width is significantly reduced through the combination of differentiated size modules;

[0016] High utilization rate: Module utilization rate has been increased from the current 68% to over 81%, reducing material waste;

[0017] Enhanced reliability: The ring-shaped frame and silicone sealing process extend the salt spray test compliance time by 3 times;

[0018] Easy maintenance: Independent installation position supports quick replacement of single modules, reducing maintenance costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1This is an overall schematic diagram of an embodiment of the present utility model;

[0021] Figure 2 , 3 An exploded view diagram provided for an embodiment of this utility model;

[0022] Figure 4 This is a comparison diagram provided for an embodiment of the present utility model.

[0023] The following are the labeling elements in the figure:

[0024] 1. Mounting base; 11. Mounting position; 2. First module; 21. First cutting module; 3. Second module; 31. Second cutting module; 4. Frame; 5. Support rod; 6. Base; 7. Display area.

[0025] The accompanying drawings have illustrated specific embodiments of the present invention, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] To make the technical solution and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0028] Please see Figures 1-3 As shown, a first module 12 and a second module 3 are purchased or manufactured according to specific aspect ratios. In this embodiment, the aspect ratio of the first module 12 is set to 9:7, and the aspect ratio of the second module 3 is set to 12:7. These two modules are manufactured using existing COB packaging technology, ensuring that the electrical and display performance of the modules meets design requirements during the manufacturing process.

[0029] Join one first module 12 and one second module 3 along their short sides. During joining, ensure the interfaces of the two modules are aligned and secure them to the mounting position 11 of the mounting base 1. Then, install the cut first cutting modules 21 and two second cutting modules 31 onto the mounting position 11 of the mounting base 1, as follows: Figure 1 , 2As shown, the circuitry between modules is ensured to conduct properly through welding or plug-in connections, enabling signal transmission. Modules can be mounted on mounting base 1 using bolts, snap-fit ​​connections, or other methods, ensuring a secure connection between the module and mounting base 1. During installation, the circuit connections between modules should be checked again to ensure they are normal and to avoid poor contact.

[0030] In this embodiment, the annular frame 4 is bonded to the edges of the first module 12, the second module 3, the first cutting module 21, and the second cutting module 31 using thermally conductive silicone. When applying the thermally conductive silicone, it is essential to ensure that the silicone is applied evenly and to a suitable thickness to guarantee a strong bond between the frame 4 and the modules, while also achieving good thermal conductivity. After the frame 4 covers the edges of all the modules, it is then fixed to the edge of the mounting base 1. This can be achieved using sealant or screws, further enhancing the stability and sealing of the entire display screen.

[0031] Heat dissipation holes are provided inside the mounting base 1. The size, number, and distribution of the heat dissipation holes should be rationally designed according to the power and heat dissipation requirements of the display screen. For example, for a display screen with higher power, the number and diameter of the heat dissipation holes can be appropriately increased to improve heat dissipation efficiency. The heat dissipation holes can be manufactured by machining or molding to ensure that the inner wall of the holes is smooth and to reduce airflow resistance.

[0032] The thermally conductive silicone used in frame 4 not only serves to bond the module and frame 4, but also conducts heat generated by the module to frame 4. The thermally conductive silicone has excellent thermal conductivity and insulation properties, effectively transferring heat from the module to the external environment. Simultaneously, the thermally conductive silicone also fills the gap between the module and frame 4, acting as a seal to prevent dust, moisture, and other contaminants from entering the display screen, thus achieving an IP65 protection rating.

[0033] The display screen also includes a support rod 5 and a base 6. The support rod 5 is located between the mounting base 1 and the base 6, and its height is adjustable. The height of the support rod 5 can be adjusted according to actual needs in different usage scenarios. For example, in an exhibition setting, if the display screen needs to be placed at a higher position to attract more attention, the height of the support rod 5 can be increased; if space is limited, the height of the support rod 5 can be decreased. The height of the support rod 5 can be adjusted manually, such as by rotating a nut or inserting / removing a pin, to fix and adjust the height.

[0034] Through the above specific implementation methods, a narrow-bezel COB integrated circular display screen can be manufactured and installed. This display screen has advantages such as narrow bezel, high module utilization, good heat dissipation and protection performance, and scene adaptability.

[0035] To gain a more thorough and comprehensive understanding of the disclosure of this utility model, its principles will be further explained below in conjunction with existing technologies.

[0036] like Figure 4 As shown in Table 1, when using a single-size display screen for splicing, such as using 450x350mm display screens, the number of screens is 6. The complete area before cutting is 450x350x6mm=945000mm2. The largest usable circular area or display area 7 is 635850mm2, with a utilization rate of only 67.2%. The width of the bezel 4 accounts for a relatively large proportion.

[0037]

[0038] Table 1

[0039] Similarly, if 600x350mm displays are used, the total area before cutting is 600x350x6mm = 1260000mm2, and the largest usable circular area is 865901mm2, with a utilization rate of only 68.7%, and the bezel width is still relatively large.

[0040] When using a combination of large and small screens, such as three 450x350mm displays and three 600x350mm displays, the total area before cutting is 1,063,125mm², and the largest usable circular area is 865,901mm², achieving a utilization rate of 81.4%. The bezel width is relatively small, which is higher than the 78.5% utilization rate of the circular area of ​​a single square display, and the cost is lower.

[0041] It should be noted that the three solutions above use the same cutting method, namely stepped cutting, which effectively reduces cutting costs and the damage rate of the display screen.

[0042] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the foregoing claims.

[0043] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element present. Conversely, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations. The terms "upper end," "lower end," "left side," "right side," "front end," "rear end," and similar expressions used herein refer to the positional relationship with reference to the accompanying drawings.

[0044] It should be understood that this invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

Claims

1. A narrow-bezel COB integrated circular display screen, characterized in that: The device includes a mounting base (1), a first module (12), a second module (3), and a ring-shaped frame (4). The first module (12) and the second module (3) are of different sizes and are spliced ​​together to form a display screen with the same overall length and width. They are installed and fixed on the mounting base (1). The first module (12) and the second module (3) located diagonally are cut to form a first cutting module (21) and a second cutting module (31). The frame (4) wraps around the edges of the first module (12), the second module (3), the first cutting module (21), and the second cutting module (31) and fixes them to the mounting base. 2.The narrow-frame COB integrated circular display screen of claim 1, wherein: The mounting base (1) is provided with a plurality of mounting positions (11), the first module (12), the second module (3), the first cutting module (21), and the second cutting module (31) are fixed on the mounting positions (11), and the frame (4) is fixedly installed on the edge of the mounting base (1). 3.The narrow-frame COB integrated circular display screen of claim 1, wherein: It also includes a support rod (5) and a base (6), wherein the support rod (5) is located between the mounting base (1) and the base (6).

4. The narrow-frame COB integrated circular display screen according to claim 1, characterized in that: The aspect ratio of the first module (12) is 9:7, and the aspect ratio of the second module (3) is 12:

7. The short side of the first module (12) is connected to the short side of the second module (3).

5. The narrow frame COB integrated circular display screen according to claim 4, characterized in that: The number of the first module (12) and the second module (3) is 1; the number of the first cutting module (21) and the second cutting module (31) is 2. 6.The narrow-frame COB integrated circular display screen of claim 1, wherein: The mounting base (1) has heat dissipation holes inside, and the frame (4) is bonded to the edge of the module with thermally conductive silicone.

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