LED lamp bead and LED screen

Abstract

The invention relates to an LED lamp bead and an LED screen, and the LED lamp bead comprises a support which is provided with a first cavity, a second cavity and a third cavity; the RGB full-color light-emitting chip is arranged in the first cavity, and the first cavity is filled with a packaging colloid; the first blue light-emitting chip is arranged in the second cavity, and the second cavity is filled with a first green fluorescent colloid; and the second blue light-emitting chip is arranged in the third cavity, the third cavity is filled with a red fluorescent colloid and a second green fluorescent colloid, and the second green fluorescent colloid is located on the outer layer of the red fluorescent colloid. Through the combination of blue light and different fluorescent colloids, the improved LED lamp bead can simulate natural white light more accurately, the defects of a traditional RGB lamp bead in white light simulation are reduced, and a more comfortable and natural lighting environment is provided for a user.

Description

Technical Field

[0001] The present application relates to the field of LED lamp beads, and specifically to an LED lamp bead and an LED screen. Background Art

[0002] In the field of lighting, LED lamp beads are widely used due to their high efficiency, energy saving, long life, etc. Traditional RGB LED lamp beads can achieve rich color changes through the combination of red (R), green (G), and blue (B), meeting many scenes with diverse color needs, such as stage lighting, landscape lighting, etc.

[0003] In the related technology, on the one hand, it is difficult for LED lamp beads to accurately simulate natural white light, and there are deficiencies in creating a comfortable lighting environment. On the other hand, for application scenarios that require both white light of different color temperatures and rich colors, LED lamp beads cannot meet the needs well. Summary of the invention

[0004] The present application provides an LED lamp bead and an LED screen, which can solve the technical problem that traditional LED lamp beads are difficult to accurately simulate natural white light, are insufficient in creating a comfortable lighting environment, and cannot meet the needs of application scenarios that require both white light of different color temperatures and rich colors.

[0005] In a first aspect, an embodiment of the present application provides an LED lamp bead, characterized in that it includes:

[0006] A bracket, wherein the bracket is provided with a first chamber, a second chamber and a third chamber;

[0007] An RGB full-color light-emitting chip, wherein the RGB full-color light-emitting chip is disposed in a first cavity, and the first cavity is filled with a packaging colloid;

[0008] A blue light emitting chip 1, wherein the blue light emitting chip 1 is disposed in the second chamber, and the second chamber is filled with a green fluorescent colloid 1;

[0009] A second blue light-emitting chip, wherein the second blue light-emitting chip is disposed in the third chamber, wherein the third chamber is filled with a red fluorescent colloid and a second green fluorescent colloid, wherein the second green fluorescent colloid is located in an outer layer of the red fluorescent colloid;

[0010] The bracket comprises an inner cup and an outer cup fixed to the top surface of the inner cup;

[0011] The third chamber comprises a through hole 1 and a through hole 2 connected to the through hole 1, the through hole 1 is opened in the inner cup, the through hole 2 is opened in the outer cup, the red fluorescent colloid is filled in the through hole 1, and the green fluorescent colloid 2 is filled in the through hole 2;

[0012] The inner diameter of the first through hole is smaller than that of the second through hole;

[0013] The first through hole includes a first gradually changing through hole and a first through hole communicating with the top end of the first gradually changing through hole. The inner diameter of the first gradually changing through hole gradually decreases in the direction of the interval between the first through hole and the second through hole, and the inner diameter of the first through hole remains unchanged along its own axis direction.

[0014] In combination with the first aspect, in an embodiment, the second through hole includes a second gradually changing through hole and a second through hole communicating with the top end of the second gradually changing through hole. The inner diameter of the second gradually changing through hole gradually decreases in the direction of the interval between the first through hole and the second through hole, and the inner diameter of the second through hole remains unchanged along its own axis direction.

[0015] In combination with the first aspect, in an embodiment, the part of the encapsulation colloid and the first green fluorescent colloid filled in the inner cup is the base potting glue, and the remaining part filled in the outer cup is the thixotropic potting glue;

[0016] The red fluorescent colloid is the base potting glue, and the second green fluorescent colloid is the thixotropic potting glue.

[0017] In combination with the first aspect, in an embodiment, the parts of the encapsulation colloid, the first green fluorescent colloid and the second green fluorescent colloid located outside the bracket are arranged as spherical lenses.

[0018] In combination with the first aspect, in an embodiment, the LED lamp bead further includes:

[0019] A driving chip, which is electrically connected to the RGB full-color light-emitting chip, the first blue light-emitting chip and the second blue light-emitting chip;

[0020] A break-point continuous transmission integrated circuit, which is arranged on the driving chip and is used to ensure that each light-emitting chip follows the same control logic after power-off and restart.

[0021] In combination with the first aspect, in an embodiment, the driving chip is arranged in the first chamber.

[0022] In a second aspect, an embodiment of the present application provides an LED screen, which includes the LED lamp beads mentioned in some of the above embodiments.

[0023] The beneficial effects brought by the technical solutions provided by the embodiments of the present application include:

[0024] An RGB full-color light-emitting chip is disposed in the first chamber, and an encapsulation colloid is filled to protect the chip and enhance the uniformity of light. The RGB chip can emit light of three primary colors: red, green, and blue. Through the principle of color mixing, various colors of light can be generated, providing a basis for rich-color lighting effects. A blue light-emitting chip 1 is configured in the second chamber, and a green fluorescent colloid 1 is filled. The blue light emitted by the blue light-emitting chip 1 excites the green fluorescent colloid to generate additional green light, which helps to adjust the color temperature of the light to make it closer to natural white light, realizing cold white light emission. In the third chamber, a blue light-emitting chip 2 is disposed, and a red fluorescent colloid and a green fluorescent colloid 2 (located on the outer layer of the red fluorescent colloid) are filled in sequence. Not only does the blue light excite the red fluorescent colloid to generate red light, but also the combination of the remaining blue light and the green fluorescent colloid further enriches the spectral components, improves the accuracy of white light simulation and the color saturation, realizing warm white light emission. Through the combination of blue light and different fluorescent colloids, the improved LED lamp bead can more accurately simulate natural white light, reducing the deficiencies of traditional RGB lamp beads in white light simulation and providing a more comfortable and natural lighting environment for users. Description of the Drawings

[0025] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0026] Figure 1 It is a top view structural schematic diagram of the LED lamp bead;

[0027] Figure 2 It is a side cross-sectional structural schematic diagram of an embodiment of the bracket;

[0028] Figure 3 It is a side cross-sectional structural schematic diagram of another embodiment of the bracket;

[0029] Figure 4 It is a structural schematic diagram of the red fluorescent colloid and the green fluorescent colloid 2 filled in the third chamber;

[0030] Figure 5 It is a circuit structural schematic diagram of the LED lamp bead.

[0031] In the figure: 1. Bracket; 11. First chamber; 12. Second chamber; 13. Third chamber; 131. First through hole; 132. Second through hole; 14. Inner cup; 15. Outer cup; 2. RGB full-color light-emitting chip; 21. Green light-emitting chip; 22. Red light-emitting chip; 23. Third blue light-emitting chip; 3. First blue light-emitting chip; 4. Second blue light-emitting chip; 5. Red fluorescent colloid; 6. Second green fluorescent colloid; 7. Driver chip. Detailed implementation manners

[0032] To enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0033] The embodiments of this application provide an LED lamp bead and an LED screen, which can solve the technical problems that traditional LED lamp beads are difficult to accurately simulate natural white light, are insufficient in creating a comfortable lighting environment, and cannot well meet the requirements for application scenarios that need to simultaneously consider white light of different color temperatures and rich colors.

[0034] In the first aspect, as Figure 1 shown, the embodiments of this application provide an LED lamp bead, which includes: a bracket 1, the bracket 1 is provided with a first chamber 11, a second chamber 12 and a third chamber 13; an RGB full-color light-emitting chip 2, the RGB full-color light-emitting chip 2 is arranged in the first chamber 11, and the first chamber 11 is filled with a packaging colloid; a first blue light-emitting chip 3, the first blue light-emitting chip 3 is arranged in the second chamber 12, and the second chamber 12 is filled with a first green fluorescent colloid; a second blue light-emitting chip 4, the second blue light-emitting chip 4 is arranged in the third chamber 13, the third chamber 13 is filled with a red fluorescent colloid 5 and a second green fluorescent colloid 6, and the second green fluorescent colloid 6 is located on the outer layer of the red fluorescent colloid 5.

[0035] In this embodiment, an RGB full-color light-emitting chip 2 is disposed in the first chamber 11, and an encapsulation colloid is filled to protect the chip and enhance the light-emitting effect. The RGB full-color light-emitting chip 2 can emit light of three primary colors, red, green, and blue. By mixing these three colors, almost any color of light can be produced, laying a foundation for simulating natural white light and providing rich colors. In the second chamber 12, a blue light-emitting chip 1 3 is disposed, and a green fluorescent colloid 1 is filled. When the blue light-emitting chip 1 emits blue light, part of the blue light will excite the green fluorescent colloid 1 to emit green light. After the blue light and the green light are mixed, a cyan-white light (cold white light) closer to natural light can be produced. In the third chamber 13, another blue light-emitting chip 2 4 is disposed, and a double-layer structure of a red fluorescent colloid 5 and a green fluorescent colloid 2 6 is filled. Among them, the green fluorescent colloid 2 6 is located on the outer layer of the red fluorescent colloid 5. When the blue light-emitting chip 2 4 emits blue light, the blue light will first excite the red fluorescent colloid 5 to emit red light. Subsequently, part of the blue light and the red light will penetrate the red fluorescent colloid and excite the green fluorescent colloid 2 6 to emit green light. In this way, the blue light, the red light, and the green light are mixed in the third chamber 13 to produce a more natural, soft, and color-temperature adjustable white light (warm white light). Through the combination of the RGB full-color light-emitting chip 2 and specific fluorescent colloids, the improved LED lamp bead can more accurately simulate natural white light, improving the comfort and realism of lighting. The application of the RGB full-color light-emitting chip 2 enables the LED lamp bead to emit almost any color of light, meeting the requirements of colorful application scenarios. By adjusting the ratio of the light-emitting chips and fluorescent colloids in different chambers or controlling their light-emitting intensities, the color temperature can be adjusted, further meeting the diverse requirements of different application scenarios for the color temperature.

[0036] Combined with the first aspect, in an implementation manner, as Figure 2 shown, the bracket 1 includes an inner cup 14 and an outer cup 15 fixed to the top surface of the inner cup 14; the third chamber 13 includes a through hole 1 131 and a through hole 2 132 communicated with the through hole 1 131. The through hole 1 131 is opened in the inner cup 14, the through hole 2 132 is opened in the outer cup 15, the red fluorescent colloid 5 is filled in the through hole 1 131, and the green fluorescent colloid 2 6 is filled in the through hole 2 132.

[0037] In this embodiment, the third chamber 13 includes a first through hole 131 and a second through hole 132 communicating with the first through hole 131. The first through hole 131 is formed in the inner cup 14, and the second through hole 132 is formed in the outer cup 15, so that the red fluorescent colloid 5 can be independently filled in the first through hole 131, and the second green fluorescent colloid 6 can be filled in the second through hole 132, realizing the layered filling of the fluorescent colloid. By filling the red fluorescent colloid 5 and the second green fluorescent colloid 6 in layers, the color temperature of the white light emitted by the LED lamp beads can be adjusted more precisely. Because different color temperature effects will be produced when red light and green light are mixed, the color temperature can be accurately adjusted by independently controlling the amounts of these two fluorescent colloids to meet the requirements of more application scenarios. The layered filled fluorescent colloid can absorb the blue light emitted by the second blue light-emitting chip 4 more fully and convert it into red light and green light. In this way, not only can the simulation accuracy of the white light be improved, but also the color saturation of the red light and the green light can be increased, making the color performance of the LED lamp beads more vivid and saturated. The fixed connection between the inner cup 14 and the outer cup 15 enhances the overall structural stability of the bracket 1, making the LED lamp beads not easily deformed or damaged during long-term use, and improving the reliability and service life of the product.

[0038] Combined with the first aspect, in one embodiment, as Figure 2 shown, the inner diameter of the first through hole 131 is smaller than the inner diameter of the second through hole 132.

[0039] In this embodiment, first, from a functional perspective, the first through hole 131 and the second through hole 132 are respectively used to fill different fluorescent colloids to produce a specific light color effect. The first through hole 131 has a smaller inner diameter and is more suitable for filling a fluorescent colloid with specific requirements for light color, such as the red fluorescent colloid 5, because it can more centrally control the emission and mixing of light. The second through hole 132 has a larger inner diameter and is used to fill the second green fluorescent colloid 6 to further adjust or enhance the overall light color effect. Secondly, from the perspective of manufacturing process, the design of through holes with different inner diameters helps to optimize the filling process of the fluorescent colloid. The smaller first through hole 131 can more easily control the amount and distribution of the fluorescent colloid, ensuring the uniformity and consistency of the light color, while the larger second through hole 132 facilitates the rapid filling and curing of the fluorescent colloid, improving production efficiency.

[0040] Combined with the first aspect, in one embodiment, as Figure 3 shown, the first through hole 131 includes a first gradually changing through hole and a first through hole communicating with the top end of the first gradually changing through hole. The inner diameter of the first gradually changing through hole gradually becomes smaller in the direction of the interval between the first through hole 131 and the second through hole 132, and the inner diameter of the first through hole remains unchanged along its own axis direction.

[0041] In this embodiment, the inner diameter of the first gradually-varying through-hole gradually decreases in the direction of the interval between the first through-hole 131 and the second through-hole 132. This gradually-varying design enables the blue light emitted by the blue light-emitting chip 4 to produce a more uniform and gradually-changing excitation effect when passing through the fluorescent colloid, and the mixing of light colors also becomes more uniform and natural. The inner diameter of the first through-hole remains unchanged along its own axis, which provides a guarantee for the stable filling of the fluorescent colloid and ensures the consistency and stability of the light color. The combined design of the gradually-varying through-hole and the first through-hole, while keeping the overall structure of the bracket 1 light, also enhances its structural strength. Especially for the part of the gradually-varying through-hole, since its inner diameter gradually decreases, a structure similar to a "wedge" is formed. This structure can better disperse stress when subjected to external forces, improving the compressive and tensile abilities of the bracket 1.

[0042] Combined with the first aspect, in an embodiment, as Figure 3 shown, the second through-hole 132 includes a second gradually-varying through-hole and a second through-hole communicating with the top end of the second gradually-varying through-hole. The inner diameter of the second gradually-varying through-hole gradually decreases in the direction of the interval between the first through-hole 131 and the second through-hole 132, and the inner diameter of the second through-hole remains unchanged along its own axis.

[0043] In this embodiment, the gradually decreasing inner diameter of the second gradually-varying through-hole can cause the light to refract and scatter more uniformly when passing through, which helps to improve the light distribution and mixing effect. The gradually-varying design can also reduce the stress concentration phenomenon caused by sudden changes in the aperture, improving the structural strength of the through-hole. The inner diameter of the second through-hole remains unchanged, providing a guarantee for the stable filling of the fluorescent colloid and ensuring the consistency of the light color and the long-term stability of the fluorescent colloid. This design of the second through-hole 132 not only considers the light propagation effect but also takes into account the structural strength and the filling requirements of the fluorescent colloid. By cooperating with the first through-hole 131, more precise light color regulation and higher lighting effects can be achieved.

[0044] Combined with the first aspect, in an embodiment, the bracket 1 includes an inner cup 14 and an outer cup 15 fixed to the top surface of the inner cup 14; the part of the encapsulation colloid and the first green fluorescent colloid filled in the inner cup 14 is the base potting glue, and the remaining part filled in the outer cup 15 is the thixotropic potting glue; the red fluorescent colloid 5 is the base potting glue and is filled in the inner cup 14, and the second green fluorescent colloid 6 is the thixotropic potting glue and is filled in the outer cup 15.

[0045] In this embodiment, the encapsulation colloid and the first green fluorescent colloid are used as the basic potting compound and filled in a part of the inner cup 14. This means that in the inner cup 14, a layer of the basic potting compound containing specific encapsulation colloid and the first green fluorescent colloid will be filled first to ensure the sealing performance and fluorescent effect of the inner cup 14. The remaining part of the outer cup 15 is filled with a high thixotropic potting compound. The high thixotropic potting compound has good fluidity and thixotropy, and can maintain a stable shape during the filling process to ensure the encapsulation effect of the outer cup 15. The red fluorescent colloid 5 is specifically designated as the basic potting compound and filled in the inner cup 14, which indicates that the red fluorescent colloid 5 not only has a fluorescent effect but also undertakes the sealing and fixing functions of the basic potting compound. The second green fluorescent colloid 6 is used as the thixotropic potting compound and filled in the outer cup 15. Similar to the red fluorescent colloid 5, the second green fluorescent colloid 6 ensures the encapsulation stability and durability of the outer cup 15 while providing a fluorescent effect.

[0046] Combined with the first aspect, in one embodiment, the basic potting compound includes epoxy resin potting compound, polyurethane potting compound and silicone potting compound, and the high thixotropic potting compound includes epoxy resin potting compound, silicone potting compound and polyurethane potting compound. And these potting compounds are made into high thixotropic potting compounds by adding thixotropic additives (the materials of thixotropic additives are usually polymers or high molecular compounds, and these compounds contain certain gel components and can form a gel network to achieve the change of rheological properties).

[0047] Combined with the first aspect, in one embodiment, as Figure 4 shown, the parts of the encapsulation colloid, the first green fluorescent colloid and the second green fluorescent colloid 6 located outside the bracket 1 are arranged as spherical lenses.

[0048] In this embodiment, the parts of the encapsulation colloid, the first green fluorescent colloid and the second green fluorescent colloid 6 located outside the bracket 1 are designed as spherical lenses. This design can optimize the refraction and focusing effects of light. The arrangement of spherical lenses helps the convergence of light, which may be used to enhance the intensity of the fluorescent signal or change its propagation direction, thereby improving the sensitivity and accuracy of optical detection or imaging. Through the design of spherical lenses, the encapsulation colloid, etc. can be more firmly attached to the bracket 1, reducing the influence of the external environment on the inside of the encapsulation, such as reducing the penetration of moisture and preventing the intrusion of external pollutants. This design helps to improve the stability and reliability of the encapsulation and extend the service life of the product.

[0049] Combined with the first aspect, in one embodiment, as Figure 1As shown, the LED lamp bead further includes: a driving chip 7, which is electrically connected to the RGB full-color light-emitting chip 2, the first blue light-emitting chip 3, and the second blue light-emitting chip 4; a breakpoint resuming integrated circuit, which is arranged on the driving chip 7 and is used to ensure that each light-emitting chip follows the same control logic after power-off and restart.

[0050] In this embodiment, the driving chip 7 is electrically connected to the above-mentioned light-emitting chips, responsible for providing stable current and voltage for these chips to ensure their normal operation. By precisely controlling the magnitude of the current input to the light-emitting chips, the driving chip 7 can adjust the brightness and color of the LED lamp. The breakpoint resuming integrated circuit is arranged in the driving chip 7, which is an important additional function. When the LED lamp bead encounters a power-off situation during operation, the breakpoint resuming integrated circuit can ensure that each light-emitting chip follows the same control logic after power-off and restart. This means that even if a power-off occurs, the LED lamp bead can resume its previous working state after being re-powered, avoiding problems such as chaotic control logic or inconsistent color and brightness caused by power-off. Through the design of the breakpoint resuming integrated circuit, the LED lamp bead can continue to operate in the case of partial component failures or external power fluctuations, improving the stability and reliability of the entire system. The breakpoint resuming function ensures that the LED lamp bead can quickly resume its previous working state after power-off and restart, avoiding the trouble for users to re-set parameters such as color and brightness, and enhancing the user experience. Due to the power-off resuming function, this kind of LED lamp bead is more suitable for application scenarios that require long-term operation and have high requirements for stability, such as stage lighting, urban landscape lighting, etc.

[0051] Combined with the first aspect, in an implementation manner, as Figure 1 shown, the driving chip 7 is arranged in the first chamber 11.

[0052] In this embodiment, arranging the driving chip 7 and the RGB full-color light-emitting chip 2 in the first chamber 11 can make the structure of the LED lamp bead more compact and reasonable, improving the overall integration and reliability.

[0053] Combined with the first aspect, in an implementation manner, as Figure 5 shown, the driving chip 7 controls red (R), green (G), blue (B1, B2, B3) to achieve full-color and warm and cold white light functions. The positive electrode of the RGB full-color light-emitting chip 2 and the voltage input terminal VDD of the driving chip 7 are both externally connected to power. After the signal input terminal of the driving chip 7 receives a signal from the outside, it outputs signals through 5 OUT output channels to control red (R), green (G), blue (B1, B2, B3) to be lit separately to achieve the full-color and warm and cold white light adjustment function. At the same time, the signal is transmitted to the next device through the Dout output signal terminal.

[0054] In a second aspect, embodiments of the present application provide an LED screen, which includes the LED lamp beads as mentioned in some of the above embodiments.

[0055] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0056] It should be noted that in the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0057] The above is only the specific implementation manners of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An LED lamp bead, characterized in that, It includes: A bracket (1), and the bracket (1) is provided with a first chamber (11), a second chamber (12) and a third chamber (13); An RGB full-color light-emitting chip (2), and the RGB full-color light-emitting chip (2) is arranged in the first chamber (11), and the first chamber (11) is filled with encapsulating colloid; A first blue light-emitting chip (3), and the first blue light-emitting chip (3) is arranged in the second chamber (12), and the second chamber (12) is filled with a first green fluorescent colloid; A second blue light-emitting chip (4), and the second blue light-emitting chip (4) is arranged in the third chamber (13), the third chamber (13) is filled with a red fluorescent colloid (5) and a second green fluorescent colloid (6), and the second green fluorescent colloid (6) is located on the outer layer of the red fluorescent colloid (5); The bracket (1) includes an inner cup (14) and an outer cup (15) fixed to the top surface of the inner cup (14); The third chamber (13) includes a first through hole (131) and a second through hole (132) communicated with the first through hole (131), the first through hole (131) is formed in the inner cup (14), the second through hole (132) is formed in the outer cup (15), the red fluorescent colloid (5) is filled in the first through hole (131), and the second green fluorescent colloid (6) is filled in the second through hole (132); The inner diameter of the first through hole (131) is smaller than the inner diameter of the second through hole (132); The first through hole (131) includes a first gradually-varying through hole and a first through hole communicated with the top end of the first gradually-varying through hole, the inner diameter of the first gradually-varying through hole gradually becomes smaller in the direction of the interval between the first through hole (131) and the second through hole (132), and the inner diameter of the first through hole remains unchanged along its own axis direction.

2. The LED lamp bead according to claim 1, wherein The second through hole (132) includes a second gradually-varying through hole and a second through hole communicated with the top end of the second gradually-varying through hole, the inner diameter of the second gradually-varying through hole gradually becomes smaller in the direction of the interval between the first through hole (131) and the second through hole (132), and the inner diameter of the second through hole remains unchanged along its own axis direction.

3. The LED lamp bead according to claim 1, wherein The part of the encapsulating colloid and the first green fluorescent colloid filled in the inner cup (14) is a basic potting adhesive, and the remaining part filled in the outer cup (15) is a thixotropic potting adhesive; The red fluorescent colloid (5) is a basic potting adhesive, and the second green fluorescent colloid (6) is a thixotropic potting adhesive.

4. The LED lamp bead according to claim 1, wherein The parts of the encapsulating colloid, the first green fluorescent colloid and the second green fluorescent colloid (6) located outside the bracket (1) are arranged in a spherical lens shape.

5. The LED lamp bead according to claim 1, wherein The LED lamp bead further includes: A driving chip (7), and the driving chip (7) is electrically connected to the RGB full-color light-emitting chip (2), the first blue light-emitting chip (3) and the second blue light-emitting chip (4); Breakpoint resume integrated circuit, the breakpoint resume integrated circuit is arranged in the driving chip (7), and the breakpoint resume integrated circuit is used to ensure that each light-emitting chip follows the same control logic after power-off restart.

6. The LED lamp bead according to claim 5, wherein The driving chip (7) is arranged in the first chamber (11).

7. An LED screen, characterized in that, It includes the LED lamp bead according to any one of claims 1-6.

Images