Outdoor rental small-spacing LED screen lamp bead structure and manufacturing method
By adopting a combination of large-size lamp beads and small-mouth shallow-mouthed cup structures, the problems of reduced welding force and contrast caused by the reduction of LED bead size are solved, and higher welding strength and clearer display effects are achieved.
Patent Information
- Application Number
- CN202510211489.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2025-05-30
AI Technical Summary
As the size of LED lamp beads decreases, the welding area decreases, resulting in a decrease in welding force, and it is easy to cause dead lamps; at the same time, the spacing between lamp beads decreases, and lights are prone to interfere with each other, resulting in halo and crosstalk.
The metal bracket and pins of large-size lamp beads are used, combined with the shallow-mouth cup structure of the small cup mouth, which increases the welding area to enhance the welding strength. Through the round table design of the shallow-mouth cup and high reflectivity material, the light diffusion is accurately controlled and light scattering and crosstalk are reduced.
It significantly enhances welding strength, reduces the risk of dead lights, and improves the reliability and stability of the display; at the same time, by precise control of light, the brightness and contrast are improved, making the display content clearer and clearer.
Smart Images
Figure CN120076544A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of LED screens, and particularly relates to a light-emitting diode (LED) bead structure for outdoor rental small-pitch LED screens and a manufacturing method thereof. Background Art
[0002] With the increasing demand for high-definition, high-brightness, and high-stability display screens in fields such as outdoor advertising, event displays, and public information dissemination, outdoor rental small-pitch LED screens, as an advanced display technology, are gradually becoming the mainstream choice in the market. Such display screens require that the LED bead structure not only has high brightness, high contrast, and excellent color performance, but also has good heat dissipation performance, high reliability, and long lifespan to adapt to the complex and changeable outdoor environmental conditions.
[0003] In the design of LED beads, in order to improve the display effect and reduce the interference of ambient light, the application of matte technology and dark-colored materials is widely adopted. The matte technology effectively reduces the specular reflection on the surface of the LED beads by reducing the mirror reflection on the bead surface, thereby reducing the stray light on the display screen and improving the contrast of the picture. At the same time, by selecting dark plastic materials or dark encapsulation glue surfaces and taking advantage of the absorption characteristics of dark-colored materials for redundant light, the interference of ambient light on the display screen is further reduced, significantly improving the clarity and contrast of the picture.
[0004] However, with the booming development of the high-definition display market, consumers' requirements for the resolution and clarity of display screens are getting higher and higher, which has prompted the continuous reduction of the size of LED beads to conform to the development trend of high-definition displays. Although the reduction in bead size brings higher resolution and finer picture effects, it also poses a series of new technical challenges.
[0005] First of all, the reduction in bead size reduces the welding area between the LED beads and the printed circuit board (PCB), resulting in weakened welding force. During the handling and assembly of rental display screens, due to insufficient welding force, the LED beads are easily affected by bumps and vibrations, leading to loose or broken welding points and then the occurrence of dead lights. This not only affects the display effect of the display screen but also increases the cost of repairing and replacing LED beads.
[0006] Secondly, the reduction in bead size also leads to a gradual decrease in the contrast of small-pitch rental displays. On the one hand, as the bead size decreases, the distance between adjacent beads also decreases accordingly, making it easier for the light between adjacent beads to interfere with each other, resulting in halo and crosstalk phenomena and reducing the contrast of the picture. On the other hand, due to the reduction in bead size, the light-emitting area inside the LED beads also decreases accordingly, leading to a decrease in luminous efficiency and further affecting the brightness and contrast of the picture.
[0007] To this end, those skilled in the art have proposed a light-emitting diode (LED) bead structure for outdoor rental small-pitch LED screens and a manufacturing method thereof to solve the problems raised in the background art. Summary of the Invention
[0008] To solve the above technical problems, the present invention provides an LED bead structure for outdoor rental small-pitch LED screens and a manufacturing method thereof to solve the problems in the background art.
[0009] An LED bead structure for outdoor rental small-pitch LED screens and a manufacturing method thereof include:
[0010] A metal bracket, on which a chip is disposed at the upper end.
[0011] Leads, which are installed outside the metal bracket, and the leads are electrically connected to the chip.
[0012] A plastic-encapsulated bracket, which is disposed on the outer surfaces of the metal bracket and the leads.
[0013] A shallow cup, which is disposed at the upper end of the metal bracket. The shallow cup is configured as a frustum of a cone. The shallow cup is used to diffuse the light emitted by the chip. The inside of the shallow cup is filled with a packaging adhesive, and a reflectivity aid is added to the inside of the packaging adhesive. The diameter of the lower bottom surface of the shallow cup is smaller than that of the upper bottom surface.
[0014] A lens body, which is disposed at the mouth of the shallow cup. The lens body is configured as a hemisphere.
[0015] Preferably, the leads are composed of upper leads and lower leads. The upper leads are electrically connected to the lower leads. The upper leads are electrically connected to the chip. The upper leads are plastic-encapsulated inside the plastic-encapsulated bracket, and the lower leads are disposed at the lower end of the plastic-encapsulated bracket.
[0016] Preferably, a packaging bracket is disposed on the upper end of the plastic-encapsulated bracket and the outer surface of the shallow cup.
[0017] A manufacturing method for an LED bead structure for outdoor rental small-pitch LED screens includes the following steps:
[0018] S1. Formation of the bracket: First, a large-size LED bead is selected, and the metal bracket, leads, and shallow cup of the LED bead are placed in an injection mold. Then, a colloid is poured into the mold. After curing, a plastic-encapsulated bracket and a packaging bracket are formed, thereby forming a bracket. The bracket has a bracket cup combination body with a large-size base and a shallow cup structure with a small cup mouth.
[0019] S2. Installation of the chip: Next, die bonding operation is performed inside the bracket cup. First, a vision positioning system is used to position and place the chip.
[0020] S3. Welding of the chip: Then, the chip and the leads are welded through gold wire bonding to form an electrical connection.
[0021] S4, Cleaning: Subsequently, the stent cup with the chip installed is subjected to plasma cleaning treatment, using an Ar / O 2 mixed gas, with a treatment time of 60 - 90 seconds and a vacuum degree maintained at the 10-2 Pa level;
[0022] S5, Dispensing: First, the encapsulation glue containing a high reflectivity additive is used to fill the shallow cup through the dispensing process. Then, secondary dispensing is performed at the upper end of the cup mouth of the shallow cup to form a hemispherical glue layer. The encapsulation glue material contains a silicone oligomer with an alicyclic epoxy group, a phenylsiloxane prepolymer, and a reactive group for alcohol-eliminating reaction, and a three-dimensional cross-linked network structure is formed through the alcohol-eliminating reaction.
[0023] Preferably, in the S1, a stepped anti-overflow glue line surface is set at the cup mouth of the shallow cup through the dispensing machine process. The height difference of the first step is 0.05 - 0.08 mm, the height difference of the second step is 0.12 - 0.15 mm, and the step spacing is 0.2 - 0.3 mm.
[0024] Preferably, the depth of the shallow cup is 0.35 - 0.45 mm, and the inner surface of the shallow cup is plated with a nano-silver coating with a reflectivity ≥ 92%.
[0025] Preferably, in the S2, the bonding pressure is 30 - 50 g, and the ultrasonic power is 80 - 120 mW.
[0026] Preferably, the alcohol-eliminating reaction in the S5 is carried out at 80 - 100 °C, and the reaction time is 40 - 60 minutes.
[0027] Compared with the prior art, the present invention has the following beneficial effects:
[0028] 1. By adopting the combined structure of a two-in-one large-size welding area lamp bead and a shallow cup with a small cup mouth, the present invention can have a larger welding area, thereby significantly enhancing the welding strength. This not only reduces the risk of dead lamps but also improves the reliability and stability of the display screen, making the entire outdoor rental LED display system more durable during long-term use and reducing the replacement and maintenance costs caused by dead lamps and poor display effects. The stable performance and excellent display effect extend the product service life, improve the product cost performance, and create greater value for users. Secondly, the design of the small cup mouth of the shallow cup can precisely control the light, reducing light scattering and crosstalk. Since the shallow cup is frustum-shaped and the diameter of the lower bottom surface is slightly smaller than that of the upper bottom surface, when the chip emits light, the shallow cup can provide a relatively uniform light distribution, enabling the light to have a gradually diffusing process when exiting, thus avoiding the light being too concentrated or too scattered. Moreover, the high reflectivity material used inside the cup mouth further improves the light utilization rate. This design not only improves the brightness but also significantly enhances the contrast of the display screen, making the displayed content clearer and more vivid.
[0029] 2. The present invention improves the light utilization rate by setting a shallow cup with a depth of 0.35 - 0.45 mm. While enhancing the contrast, it also increases the brightness. A deeper lamp cup will increase the number of reflections of light inside the lamp cup, resulting in increased light loss, thereby reducing the light utilization rate and brightness.
[0030] 3. In the present invention, the encapsulating glue material in the dispensing process contains an organosilicon oligomer with an alicyclic epoxy group, a phenylsiloxane prepolymer, and a reactive group to undergo a dealcoholization reaction. Through the dealcoholization reaction, a three-dimensional cross-linked network structure is formed, which can improve heat resistance, weather resistance, and chemical resistance, solve the technical problem of ultrasonic scanning delamination of outdoor LED packaging products, greatly improve the quality of the products, and further control costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 is a schematic structural diagram of the present invention;
[0032] Figure 2 is a schematic diagram of a partial structure of the present invention;
[0033] Figure 3 is a cross-sectional view of the present invention;
[0034] Figure 4 is a flowchart of the manufacturing method of the present invention.
[0035] In the figure:
[0036] 1. Metal bracket; 2. Chip; 3. Pin; 31. Upper pin; 32. Lower pin; 4. Plastic encapsulation bracket; 5. Shallow cup; 6. Encapsulation bracket; 7. Lens body. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0037] The following further describes in detail the embodiments of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.
[0038] As shown in Figure 1 to Figure 4 shown:
[0039] Embodiment 1: The present invention provides a light-emitting diode (LED) bead structure for an outdoor rental small-pitch LED screen, including:
[0040] A metal bracket 1, on the upper end of the metal bracket 1 is provided with a chip 2, and there are several chips 2, and the chips 2 include, but are not limited to, red LED chips, blue LED chips, green LED chips, or violet LED chips.
[0041] A pin 3, which is installed on the outside of the metal bracket 1, and the pin 3 is electrically connected to the chip 2;
[0042] The plastic package bracket 4 is disposed on the outer surfaces of the metal bracket 1 and the pins 3;
[0043] The shallow cup 5 is disposed at the upper end of the metal bracket 1. The shallow cup 5 is configured as a frustum of a cone. The shallow cup 5 is used to diffuse the light emitted by the chip 2. The inside of the shallow cup 5 is filled with encapsulating glue, and a reflectivity aid is added to the encapsulating glue. The diameter of the lower bottom surface of the shallow cup 5 is smaller than that of the upper bottom surface; wherein the depth of the shallow cup 5 is 0.35 - 0.45 mm
[0044] The lens body 7 is disposed at the cup mouth of the shallow cup 5. The lens body 7 is configured as a hemisphere.
[0045] The pin 3 is composed of an upper pin 31 and a lower pin 32. The upper pin 31 is electrically connected to the lower pin 32. The upper pin 31 is electrically connected to the chip 2. The upper pin 31 is plastic - encapsulated inside the plastic package bracket 4, and the lower pin 32 is disposed at the lower end of the plastic package bracket 4.
[0046] An encapsulation bracket 6 is disposed on the upper end of the plastic package bracket 4 and the outer surface of the shallow cup 5.
[0047] As can be seen from the above, in the structure of the outdoor rental small - pitch LED screen lamp bead, first, the metal bracket 1 is used as the support body of the whole structure, and the chip 2 installed at its upper end is the core component for emitting light. The pins 3 are electrically connected to the chip 2 to ensure that current can be smoothly transmitted to the chip 2, thereby exciting the chip 2 to emit light. The plastic package bracket 4 and the encapsulation bracket 6 are wrapped on the outer surfaces of the metal bracket 1, the upper pin 31, and the shallow cup 5, providing necessary protection and insulation. This outdoor rental small - pitch LED screen uses large - size lamp beads with a larger welding area, thus significantly enhancing the welding strength. This not only reduces the risk of dead lights but also improves the reliability and stability of the display screen, making the entire outdoor rental LED display system more durable during long - term use.
[0048] Secondly, the shallow cup 5 adopts a frustum - of - a - cone design, which can effectively diffuse the light emitted by the chip 2. The diameter of the lower bottom surface of the shallow cup 5 is smaller than that of the upper bottom surface, forming a small cup mouth, so as to reduce light scattering and crosstalk. The encapsulating glue filled inside the shallow cup 5 not only plays a role in fixing and protecting but also adds a reflectivity aid, further improving the utilization rate of light. The lens body 7 is disposed at the cup mouth of the shallow cup 5, and its hemispherical shape helps to further focus and diffuse the light, making the light - emitting effect of the LED lamp bead more uniform and bright.
[0049] The LED beads of this LED screen, by adopting the combined structure of two-in-one large-size welding area beads and a small-cup shallow cup 5, can have a larger welding area, thus significantly enhancing the welding strength. This not only reduces the risk of dead beads but also improves the reliability and stability of the display screen, making the entire outdoor rental LED display system more durable during long-term use and reducing the replacement and repair costs caused by dead beads and poor display effects. The stable performance and high-quality display effect extend the product service life, improve the product cost performance, and create greater value for users. Secondly, the small-cup design of the shallow cup 5 can precisely control the light, reducing light scattering and crosstalk. Since the shallow cup 5 is frustum-shaped and the diameter of the lower bottom surface is slightly smaller than that of the upper bottom surface, when the chip 2 emits light, the shallow cup can provide a relatively uniform light distribution, enabling the light to have a gradually diffusing process when exiting, thus avoiding the light being too concentrated or too scattered. Moreover, the high-reflectivity material used inside the cup mouth further improves the light utilization rate. This design not only enhances the brightness but also significantly increases the contrast of the display screen, making the displayed content clearer and more vivid.
[0050] Embodiment 2: The present invention provides a method for manufacturing the LED bead structure of an outdoor rental small-pitch LED screen, including the following steps:
[0051] S1. Formation of the bracket: First, select large-size beads, and place the metal bracket 1, pins 3, and shallow cup 5 of the beads in an injection mold. Then, pour colloid into it, and after curing, it becomes a plastic-sealed bracket 4 and an encapsulation bracket 6, thus forming a bracket. The bracket has a combination body of a bracket cup with a large-size base and a shallow cup 5 with a small cup mouth;
[0052] S2. Installation of the chip 2: Then, perform die bonding operation inside the bracket cup. First, use a vision positioning system to position and place the chip 2;
[0053] S3. Welding of the chip 2: Then, weld the chip 2 and the pins 3 through wire bonding to form an electrical connection;
[0054] S4. Cleaning: Subsequently, perform plasma cleaning on the bracket cup installed with the chip 2, using an Ar / O2 mixed gas, with a treatment time of 60 - 90 seconds and a vacuum degree maintained at the 10—2 Pa level;
[0055] S5. Glue dispensing: First, fill the shallow cup 5 with encapsulation glue containing a high-reflectivity additive through the glue dispensing process. Then, perform secondary glue dispensing at the upper end of the cup mouth of the shallow cup 5 to form a hemispherical glue layer. The encapsulation glue material contains an alicyclic epoxy group-containing silicone oligomer, a phenylsiloxane prepolymer, and a reactive group for alcohol elimination reaction, and forms a three-dimensional cross-linked network structure through the alcohol elimination reaction.
[0056] In S1, the rim of the shallow cup 5 is provided with a stepped anti-overflow glue line surface through a dispensing machine process. The height difference of the first step is 0.05 - 0.08 mm, the height difference of the second step is 0.12 - 0.15 mm, and the step spacing is 0.2 - 0.3 mm.
[0057] The depth of the shallow cup 5 is 0.35 - 0.45 mm, and the inner surface of the shallow cup 5 is plated with a nano-silver coating with a reflectivity ≥ 92%.
[0058] In S2, the bonding pressure is 30 - 50 g, and the ultrasonic power is 80 - 120 mW.
[0059] The alcohol removal reaction in S5 is carried out at 80 - 100 °C, and the reaction time is 40 - 60 minutes.
[0060] As can be seen from the above, the manufacturing method of the outdoor rental small-pitch LED screen lamp bead structure provided by the present invention, through fine bracket forming, precise chip positioning and welding, efficient plasma cleaning, and dispensing and encapsulation processes, combined with a specially designed shallow cup structure and a high-reflectivity nano-silver coating, not only ensures the high precision and high reliability of the lamp bead structure, but also significantly improves the luminous efficiency and light utilization rate, providing excellent performance and long service life for outdoor rental LED screens. Among them, the depth of the shallow cup 5 being 0.35 - 0.45 mm can improve the light utilization rate, while enhancing the contrast, increasing the brightness, and reducing the excessive depth of the lamp cup will increase the number of reflections of light inside the lamp cup, resulting in increased light loss, thereby reducing the light utilization rate and brightness;
[0061] In the dispensing process, the encapsulation glue material contains an organosilicon oligomer with an alicyclic epoxy group, a phenylsiloxane prepolymer, and a reactive group for alcohol removal reaction. Through the alcohol removal reaction, a three-dimensional cross-linked network structure is formed, which can improve heat resistance, weather resistance, and chemical resistance, solve the technical problem of ultrasonic scanning delamination of outdoor LED packaging products, greatly improve the quality of products, and further control costs.
[0062] The standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the descriptions in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machines, parts, and equipment all adopt conventional models in the prior art. Coupled with the circuit connection adopting the conventional connection method in the prior art, it will not be elaborated here. The content not described in detail in this specification belongs to the well-known prior art of those skilled in the art.
[0063] In the description of the present invention, 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 quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. The meaning of "a plurality" is two or more, unless specifically defined otherwise.
[0064] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0065] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0066] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0067] In the attached drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved, and other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other.
[0068] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. An outdoor rental small-pitch LED screen lamp bead structure, characterized by: include: A metal bracket (1), wherein a chip (2) is arranged on the upper end of the metal bracket (1) A pin (3) is mounted on the outside of the metal bracket (1), and the pin (3) is electrically connected to the chip (2); A plastic-encapsulated bracket (4), which is arranged on the outer surface of the metal bracket (1) and the lead pin (3); A shallow cup (5) is arranged at the upper end of the metal bracket (1), the shallow cup (5) is constructed in a truncated cone shape, and is used to diffuse the light emitted by the chip 2. The shallow cup (5) is filled with packaging glue, and a reflectivity additive is added to the packaging glue. The diameter of the lower bottom surface of the shallow cup (5) is smaller than the diameter of the upper bottom surface; A lens body (7) is arranged on the mouth of the shallow cup (5), and the lens body (7) is constructed as a hemispherical body.
2. The outdoor rental small-pitch LED screen lamp bead structure as described in claim 1, characterized in that: The pin (3) is composed of an upper pin (31) and a lower pin (32); the upper pin (31) is electrically connected to the lower pin (32); the upper pin (31) is electrically connected to the chip (2); the upper pin (31) is plastic-encapsulated inside a plastic-encapsulation bracket (4); and the lower pin (32) is arranged at the lower end of the plastic-encapsulation bracket (4).
3. The outdoor rental small-pitch LED screen lamp bead structure as described in claim 1 is characterized by: A packaging bracket (6) is provided on the upper end of the plastic packaging bracket (4) and the outer surface of the shallow cup (5).
4. The outdoor rental small-pitch LED screen lamp bead structure as described in any one of claims 1-3 also includes a method for manufacturing an outdoor rental small-pitch LED screen lamp bead structure, characterized in that: The following steps are involved: S1. Formation of the bracket: firstly, a large-sized lamp bead is selected, and the metal bracket (1), pin (3) and shallow cup (5) of the lamp bead are placed in an injection mold, and then a colloid is poured into the inside, and then after curing, a plastic-sealed bracket (4) and a packaging bracket (6) are formed, thereby forming a bracket, wherein the bracket has a bracket-cup combination body having a large-sized base and a shallow cup (5) with a small cup mouth; S2. Installation of the chip (2): Then, a die bonding operation is performed in the support cup body. First, the chip (2) is positioned and placed using a visual positioning system; S3, welding of the chip (2): then welding the chip (2) and the pin (3) to form an electrical connection through gold wire bonding; S4, cleaning: then the support cup with the chip (2) mounted thereon is subjected to plasma cleaning treatment, using Ar / O2 mixed gas, the treatment time is 60 to 90 seconds, and the vacuum degree is maintained at 10-2Pa level; S5, glue dispensing: firstly, the shallow cup (5) is filled with a packaging glue containing a high reflectivity additive through a glue dispensing process, and then a second glue dispensing is performed on the upper end of the shallow cup (5) to form a hemispherical glue layer. The packaging glue material contains an organic silicone oligomer containing an alicyclic epoxy group, a phenylsiloxane prepolymer and a reactive group, and a dealcoholization reaction is carried out to form a three-dimensional cross-linked network structure through the dealcoholization reaction.
5. A method for manufacturing a lamp bead structure of an outdoor rental small-pitch LED screen as described in claim 4, characterized in that: The cup mouth of the shallow cup (5) in S1 is provided with a stepped anti-overflow glue line surface by a glue dispensing machine process, the height difference of the first step is 0.05-0.08mm, the height difference of the second step is 0.12-0.15mm, and the step spacing is 0.2-0.3mm.
6. A method for manufacturing a lamp bead structure of an outdoor rental small-pitch LED screen as described in claim 4, characterized in that: The shallow cup (5) has a depth of 0.35-0.45 mm, and the inner surface of the shallow cup (5) is plated with a nano silver coating with a reflectivity of ≥92%.
7. A method for manufacturing a lamp bead structure of an outdoor rental small-pitch LED screen as described in claim 4, characterized in that: In the S2, the bonding pressure is 30-50g, and the ultrasonic power is 80-120mW.
8. A method for manufacturing a lamp bead structure of an outdoor rental small-pitch LED screen as described in claim 4, characterized in that: The dealcoholization reaction in S5 is carried out at 80-100° C. for 40 to 60 minutes.