Two-in-one TOP LED lamp bead, preparation method thereof and display screen

Abstract

The invention discloses a two-in-one TOP LED lamp bead, a preparation method of the two-in-one TOP LED lamp bead and a display screen, and relates to the technical field of LED devices. The two-in-one TOP LED lamp bead comprises a first lamp bead and a second lamp bead which are packaged independently, separated in color and detachably connected. The first lamp bead comprises a first reflection cup, a first support, a first LED chip, a first pin and a first packaging colloid. The side, close to the second lamp bead, of the first support extends to form a first connecting part, at least part of the first pin is exposed to the top of the first connecting part, and the first pin abuts against the bottom face of the first support after being bent; the second lamp bead comprises a second reflection cup, a second support, a second LED chip, a second pin and a second packaging colloid. A second connecting part extends from one side, close to the first lamp bead, of the second reflection cup, and at least part of the second pin is exposed at the bottom of the second connecting part; and after the first lamp bead and the second lamp bead are connected, the first pin and the second pin are in contact to form electric connection. By implementing the invention, the design of the PCB lead circuit can be simplified, the display effect is improved, and the maintenance cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of LED devices, and in particular to a two-in-one TOP LED lamp bead and a preparation method thereof, and a display screen. Background Art

[0002] According to the different use environments, LED display screens can be divided into outdoor display screens and indoor display screens. Indoor display screens have lower requirements on the environment, so they can adopt a variety of packaging forms such as CHIP LED, TOP LED, COB LED, etc. However, due to the harsh use environment and high brightness requirements of outdoor display screens, TOP LED and direct-plug LED are still the main ones. Among them, direct-plug LED has large specifications and low display accuracy, which makes it difficult to meet the high-resolution display accuracy, and its application is limited. Therefore, TOP LED is currently the most widely used lamp bead.

[0003] For commonly used TOP LED lamp beads, they usually adopt a single RGB fixed solder functional area flat + external foot structure. The lamp bead is a group of RGB lamp bead structure, and the pins are a combination of 4 pins, namely red, green, blue polarity and a common polarity. The lamp bead size is large and cannot be designed to be smaller, making it difficult to further reduce the resolution, limiting the application scenario. Moreover, the currently commonly used TOP LED lamp beads have a large number of pins, and the corresponding number of circuits on the PCB board is also large, and the structure is complex.

[0004] For high-resolution indoor display screens, a new type of two-in-one lamp beads can be used. Taking the two-in-one TOPLED lamp beads as an example, they usually adopt two RGB soldering functional areas + external foot structure, the lamp beads are two groups of RGB lamp bead structures, the pins are 8 pin combinations, two groups of red, green and blue polarities and two common polarities, and the encapsulation glue wraps the lamp beads as a whole. This type of lamp bead has the following problems: 1. The number of pins is too large, and the PCB leads need to be the same as the number of single lamps, and the circuit is complicated. 2. The two-in-one lamp bead is an integral lamp bead with a fixed size, which is equivalent to fixing the pixel spacing of the display screen, which is not convenient for customers to choose the pixel spacing. 3. Since the solid crystal process is randomly grabbed, the photoelectric parameters of the first group of RGB and the second group of RGB in the two-in-one lamp bead may be quite different, affecting the final RGB display effect. 4. If one of the chips of the two-in-one lamp bead is damaged, the entire two-in-one lamp bead will be scrapped, which seriously affects the yield. At the same time, after the display screen is pasted later, if one chip is damaged, the entire two-in-one lamp bead will be scrapped, and the later maintenance cost is also high. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a two-in-one TOP LED lamp bead, which can improve the display effect and yield, reduce the design difficulty of the PCB circuit board, and reduce the cost.

[0006] In order to solve the above technical problems, the present invention provides a two-in-one TOP LED lamp bead, which includes a first lamp bead and a second lamp bead that are separately packaged and color-separated, and the first lamp bead and the second lamp bead are detachably connected;

[0007] The first lamp bead comprises a first reflector cup, a first bracket, at least one first LED chip, at least one first pin and a first packaging colloid; the first reflector cup is arranged on the first bracket and surrounds the first LED chip, a first connecting portion extends from a side of the first bracket close to the second lamp bead, the first pin is at least partially exposed at the top of the first connecting portion, and the first pin is bent and abuts against the bottom surface of the first bracket;

[0008] The second lamp bead comprises a second reflector cup, a second bracket, at least one second LED chip, at least one second pin and a second packaging colloid; the second reflector cup is arranged on the second bracket and surrounds the second LED chip, a second connecting portion extends from a side of the second reflector cup close to the first lamp bead, and the second pin is at least partially exposed at the bottom of the second connecting portion;

[0009] After the first lamp bead and the second lamp bead are connected, the first pin exposed at the top of the first connecting portion and the second pin exposed at the bottom of the second connecting portion contact each other to form an electrical connection.

[0010] As an improvement of the above technical solution, a first pin exposed at the top of the first connecting portion is welded to a second pin exposed at the bottom of the second connecting portion.

[0011] As an improvement of the above technical solution, after the first lamp bead and the second lamp bead are connected, the second connecting part partially or completely covers the first connecting part.

[0012] As an improvement of the above technical solution, the first pin includes a first embedded portion, a first exposed portion and a second exposed portion connected in sequence, the first exposed portion is arranged above the first connecting portion, one end of the second exposed portion is arranged on the side of the first bracket, and the other end is bent and abuts against the bottom surface of the first bracket; and / or

[0013] The second pin includes a second embedded portion and a third exposed portion which are connected in sequence. The third exposed portion is arranged below the second connecting portion and extends toward the first lamp bead.

[0014] As an improvement of the above technical solution, the third exposed portion is provided with a bent portion bent upward, so that the first reflector cup and the second reflector cup are flush with each other after the first lamp bead and the second lamp bead are connected.

[0015] As an improvement of the above technical solution, the first lamp bead further includes at least one third pin, one end of the third pin is arranged on the front side of the first bracket, and the other end is bent and abuts against the back side of the first bracket; the first pin and the third pin are arranged on both sides of the first LED chip; and / or

[0016] The second lamp bead also includes a fourth pin, one end of which is bonded to the front side of the second bracket, and the other end is bent to abut against the back side of the second bracket; the second pin and the fourth pin are arranged on both sides of the second LED chip.

[0017] As an improvement of the above technical solution, the first lamp bead further includes at least one first crystal-fixing area, and the first crystal-fixing area is connected or not connected to the first pin; and / or

[0018] The second lamp bead further includes a second crystal-bonding area, and the second crystal-bonding area is connected or not connected to the second pin.

[0019] As an improvement of the above technical solution, the first LED chip includes a first red LED chip, a first green LED chip and a first blue LED chip;

[0020] The first lamp bead includes three first pins, which are respectively used to electrically connect the positive electrodes of the first red LED chip, the first green LED chip and the first blue LED chip; the first lamp bead includes a third pin, which is used to electrically connect the negative electrodes of the first red LED chip, the first green LED chip and the first blue LED chip;

[0021] The first lamp bead includes three first crystal fixing areas, which are respectively used to fix the first red LED chip, the first green LED chip and the first blue LED chip;

[0022] The second LED chip includes a second red LED chip, a second green LED chip and a second blue LED chip;

[0023] The second lamp bead includes three second pins, which are respectively used to electrically connect the positive electrodes of the second red LED chip, the second green LED chip and the second blue LED chip; the second lamp bead includes a fourth pin, which is used to electrically connect the negative electrodes of the second red LED chip, the second green LED chip and the second blue LED chip;

[0024] The second lamp bead includes three second crystal fixing areas, which are respectively used to fix the second red LED chip, the second green LED chip and the second blue LED chip.

[0025] Correspondingly, the present invention also discloses a method for preparing a two-in-one TOP LED lamp bead, which is used to prepare the above-mentioned two-in-one TOP LED lamp bead, and comprises the following steps:

[0026] (1) stamping and stretching a metal substrate to obtain a first metal bracket and a second metal bracket, respectively, wherein the first metal bracket includes a pin portion, and the second metal bracket includes a second pin;

[0027] (2) forming a first bracket and a first reflector cup by injection molding on the first metal bracket, and forming a second bracket and a second reflector cup by injection molding on the second metal bracket;

[0028] (3) bending the pin portion to form a first pin;

[0029] (4) fixing the first LED chip in the first reflective cup, and fixing the second LED chip in the second reflective cup;

[0030] (5) forming a first encapsulating colloid and a second encapsulating colloid to obtain a first lamp bead and a second lamp bead;

[0031] (6) Splitting light from the first lamp bead and the second lamp bead;

[0032] (7) Connect the first lamp bead and the second lamp bead after the splitting.

[0033] Correspondingly, the present invention also discloses a display screen, which includes the above-mentioned two-in-one TOP LED lamp bead.

[0034] The implementation of the present invention has the following beneficial effects:

[0035] A two-in-one TOP LED lamp bead in one embodiment of the present invention comprises a first lamp bead and a second lamp bead which are separately packaged, color-separated and detachably connected; the first lamp bead comprises a first reflector cup, a first bracket, a first LED chip, a first pin and a first packaging colloid; a first connecting portion extends from a side of the first bracket close to the second lamp bead, the first pin is at least partially exposed to the top of the first connecting portion, and the first pin is bent and abuts against the bottom surface of the first bracket; the second lamp bead comprises a second reflector cup, a second bracket, a second LED chip, a second pin and a second packaging colloid; a second connecting portion extends from a side of the second reflector cup close to the first lamp bead, the second pin is at least partially exposed to the bottom of the second connecting portion; after the first lamp bead and the second lamp bead are connected, the first pin and the second pin are in contact to form an electrical connection. Based on the above-mentioned two-in-one TOP LED lamp bead, firstly, the first lamp bead and the second lamp bead share at least one pin, which reduces the number of pins on the back of the two-in-one TOP LED lamp bead and simplifies the design of the PCB lead circuit; secondly, the first lamp bead and the second lamp bead are separately packaged and split, so that the first lamp bead and the second lamp bead with consistent optical parameters (such as luminous flux, brightness, color temperature) and colorimetric parameters (such as color rendering index, color quality index) can be connected to form a two-in-one lamp bead, which greatly optimizes the display effect. Thirdly, the first connecting part and the second connecting part are detachably connected, that is, the distance between the first lamp bead and the second lamp bead is adjustable, which also makes the pixel spacing based on the two-in-one TOP LED lamp bead adjustable, and also makes it possible to discard one of the lamp beads according to the specific situation during subsequent maintenance, thereby reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the cross-sectional structure of a two-in-one TOP LED lamp bead in one embodiment of the present invention;

[0037] Figure 2 is a schematic diagram of the cross-sectional structure of a first lamp bead in one embodiment of the present invention;

[0038] Figure 3 is a schematic diagram of the front structure of a first lamp bead in one embodiment of the present invention;

[0039] Figure 4 is a schematic diagram of the back structure of a first lamp bead in one embodiment of the present invention;

[0040] Figure 5 is a schematic diagram of the cross-sectional structure of a second lamp bead in one embodiment of the present invention;

[0041] Figure 6 is a schematic diagram of the front structure of the second lamp bead in one embodiment of the present invention;

[0042] Figure 7 is a schematic diagram of the back structure of the second lamp bead in one embodiment of the present invention;

[0043] In the figure, 1 is a first lamp bead, 11 is a first reflective cup, 12 is a first bracket, 121 is a first connecting portion, 13 is a first LED chip, 131 is a first red LED chip, 132 is a first green LED chip, 133 is a first blue LED chip, 14 is a first pin, 141 is a first embedded portion, 142 is a first exposed portion, 143 is a second exposed portion, 15 is a first packaging colloid, 16 is a third pin, 17 is a first solid crystal area, 2 is a first lamp bead, 21 is a second reflective cup, 211 is a second connecting portion, 22 is a second bracket, 23 is a second LED chip, 231 is a second red LED chip, 232 is a second green LED chip, 233 is a second blue LED chip, 24 is a second pin, 241 is a second embedded portion, 242 is a third exposed portion, 243 is a bending portion, 25 is a second packaging colloid, 26 is a fourth pin, and 27 is a first solid crystal area. DETAILED DESCRIPTION

[0044] To make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0045] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “top” and “bottom” are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] See also Figure 1 The present embodiment provides a two-in-one TOP LED lamp bead, which includes a first lamp bead 1 and a second lamp bead 2 that are separately packaged and color-separated. The first lamp bead 1 and the second lamp bead 2 are detachably connected.

[0048] For details, see Figure 2 to Figure 4The first lamp bead 1 includes a first reflective cup 11 , a first bracket 12 , at least one first LED chip 13 , at least one first pin 14 and a first packaging colloid 15 .

[0049] Among them, the first bracket 12 and the first reflector cup 11 are both formed by injection molding of a bracket glue commonly used in the art. Specifically, the bracket glue can be PPA, PA6T, PA9T, PCT, EMC or epoxy resin, but is not limited thereto. Preferably, the bracket glue is PPA, which has high strength, good rigidity and excellent fatigue resistance. Specifically, the first reflector cup 11 is formed above the first bracket 12, and the first reflector cup 11 surrounds the first LED chip 13, and the first packaging colloid 15 is formed in the first reflector cup 11.

[0050] The first LED chip 13 may be a common upright LED chip or a vertical LED chip in the art, but is not limited thereto. In terms of the light emission wavelength, it may be a single color, a dual color, or a combination of three colors of red, green, and blue LED chips, and is designed according to the functional requirements of the actual product, and is not limited here. Through the above-mentioned first LED chip 13, various types of display screens can be formed, such as full color, dual color, monochrome, etc.

[0051] The first pin 14 is in a bent structure, and one end of the first pin 14 is disposed on the front of the first bracket 12 to be electrically connected to the electrode of the first LED chip 13. The other end of the first pin 14 is bent to abut against the back of the first bracket 12 to be electrically connected to the driving circuit on the PCB later. The material of the first pin 14 is Cu, Ag or Al, but not limited thereto. Preferably, it is Cu, and a Ni layer and an Ag layer are formed on the surface.

[0052] The first packaging colloid 15 is formed by curing a common packaging glue in the art, and specifically, the packaging glue can be epoxy resin or silicone resin, but is not limited thereto. Preferably, the packaging glue is epoxy resin.

[0053] For details, see Figure 5 to Figure 7 The second lamp bead 2 includes a second reflective cup 21 , a second bracket 22 , at least one second LED chip 23 , at least one second pin 24 and a second encapsulation colloid 25 .

[0054] Among them, the second bracket 22 and the second reflector cup 21 are both formed by injection molding of a bracket glue commonly used in the art. Specifically, the bracket glue can be PPA, PA6T, PA9T, PCT, EMC or epoxy resin, but is not limited thereto. Preferably, the bracket glue is PPA, which has high strength, good rigidity and excellent fatigue resistance. Specifically, a second reflector cup 21 is formed above the second bracket 22, and the second reflector cup 21 surrounds the second LED chip 23, and a second encapsulation colloid 25 is formed in the second reflector cup 21.

[0055] The second LED chip 23 may be a common upright LED chip or a vertical LED chip in the art, but is not limited thereto. In terms of the light emission wavelength, it may be a single color, a dual color, or a combination of three colors of red, green, and blue LED chips, and is designed according to the functional requirements of the actual product, and is not limited here. Through the above-mentioned second LED chip 23, various types of display screens can be formed, such as full color, dual color, single color, etc.

[0056] The second pin 24 is disposed on the front side of the second bracket 22 to connect with the electrode of the second chip. The second pin 24 is made of Cu, Ag or Al, but is not limited thereto. Preferably, it is Cu, and a Ni layer and an Ag layer are formed on the surface.

[0057] The second encapsulating colloid 25 is formed by curing a common encapsulating glue in the art, and specifically, the encapsulating glue can be epoxy resin or silicone resin, but is not limited thereto. Preferably, the encapsulating glue is epoxy resin.

[0058] Specifically, a first connection portion 121 extends from one side of the first bracket 12 close to the second lamp bead 2, and the first pin 14 is at least partially exposed at the top of the first connection portion 121. A second connection portion 211 extends from one side of the second reflector cup 21 close to the first lamp bead 1, and the second pin 24 is at least partially exposed at the bottom of the second connection portion 211. After the first lamp bead 1 and the second lamp bead 2 are connected, the first pin 14 exposed at the top of the first connection portion 121 and the second pin 24 exposed at the bottom of the second connection portion 211 are in contact to form an electrical connection. Based on the above connection method, firstly, the first lamp bead 1 and the second lamp bead 2 share at least one pin, which reduces the number of pins on the back of the two-in-one TOP LED lamp bead and simplifies the design of the PCB lead circuit; secondly, the first lamp bead 1 and the second lamp bead 2 are separately packaged and split, so that the first lamp bead 1 and the second lamp bead 2 with consistent optical parameters (such as luminous flux, brightness, color temperature) and chromaticity parameters (such as color rendering index and chromaticity index) can be connected to form a two-in-one lamp bead, which greatly optimizes the display effect. Third, the first connection part 121 and the second connection part 211 are detachably connected, that is, the distance between the first lamp bead 1 and the second lamp bead 2 is adjustable, which also makes the pixel spacing based on the two-in-one TOP LED lamp bead adjustable, and also makes it possible to discard one of the lamp beads according to the specific situation during subsequent maintenance, thereby reducing maintenance costs.

[0059] Specifically, the first connection part 121 and the second connection part 211 can be bonded to achieve the connection between the first lamp bead 1 and the second lamp bead 2, but it is not limited to this. Preferably, in one embodiment, the first pin 14 exposed at the top of the first connection part 121 is welded with the second pin 24 exposed at the bottom of the second connection part 211 to achieve the connection between the first lamp bead 1 and the second lamp bead 2. First, this connection process can be integrated with the later mounting welding process to simplify the preparation process of the lamp bead; second, the connection formed by welding is convenient for disassembly and assembly during the later maintenance process. Third, the electrical connection between the first pin 14 and the second pin 24 can be optimized, so that the first lamp bead 1 and the second lamp bead 2 can share at least one pin drive. Fourth, by welding, the overlapping area of ​​the first connection part 121 and the second connection part 211 can be more accurately controlled, that is, it is more conducive to achieving the spacing between the first lamp bead 1 and the second lamp bead 2, and more conducive to achieving pixel spacing adjustment.

[0060] Specifically, after the first lamp bead 1 is connected to the second lamp bead 2, the second connection portion 211 is located above the first connection portion 121, and the second connection portion 211 partially covers or completely covers the second connection portion 211 to achieve pixel spacing adjustment. Preferably, in one embodiment, the second connection portion 211 completely covers the first connection portion 121. Based on this structure, the reliability of the two-in-one TOP LED lamp bead can be improved. Based on this implementation, the extension lengths of the first connection portion 121 and the second connection portion 211 can be designed according to the requirements of the pixel spacing.

[0061] Specifically, in some embodiments, the first pin 14 includes a first embedded portion 141, a first exposed portion 142, and a second exposed portion 143 connected in sequence, the first exposed portion 142 is disposed above the first connecting portion 121, one end of the second exposed portion 143 is disposed on the side of the first bracket 12, and the other end is bent and abuts against the bottom surface of the first bracket 12. That is, the portion of the first pin 14 corresponding to the first connecting portion 121 is completely exposed. Based on this embodiment, the electrical connection between the first pin 14 and the second pin 24 can be strengthened.

[0062] Specifically, in some embodiments, the second pin 24 includes a second embedded portion 241 and a third exposed portion 242 connected at one time, and the third exposed portion 242 is disposed below the second connecting portion 211 and extends toward the first lamp bead 1. That is, the portion of the second pin 24 corresponding to the second connecting portion 211 is completely exposed. Based on this approach, the electrical connection between the first pin 14 and the second pin 24 can be strengthened.

[0063] Specifically, in some embodiments, the third exposed portion 242 is provided with a bending portion 243 that bends upward. Based on the bending portion 243, the first reflector cup 11 and the second reflector cup 21 are flush with each other after the first lamp bead 1 is connected to the second lamp bead 2. Based on the above control, not only the display effect can be further optimized, but also the airtightness of the two-in-one TOP LED lamp bead can be improved.

[0064] Specifically, in some embodiments, the first lamp bead 1 further includes at least one third pin 16, one end of the third pin 16 is arranged on the front of the first bracket 12, and the other end is bent and abuts against the back of the first bracket 12; the first pin 14 and the third pin 16 are arranged on both sides of the first LED chip 13. Preferably, in one embodiment, the first lamp bead 1 includes a third pin 16, which can be a negative pin or a positive pin, but is not limited thereto. That is, multiple first LED chips 13 can use a common negative pole or a common positive pole, but are not limited thereto.

[0065] Specifically, in some embodiments, the second lamp bead 2 further includes a fourth pin 26, one end of the fourth pin 26 is bonded to the front of the second bracket 22, and the other end is bent and abuts against the back of the second bracket 22; the second pin 24 and the fourth pin 26 are arranged on both sides of the second LED chip 23. Preferably, in one embodiment, the second lamp bead 2 includes a fourth pin 26, which can be a cathode pin or a cathode pin, but is not limited thereto. That is, the plurality of first LED chips 13 can use a common cathode or a common anode, but is not limited thereto.

[0066] Specifically, in some embodiments, the first lamp bead 1 further includes at least one first solid crystal area 17, and the first solid crystal area 17 is connected or not connected to the first pin 14. Exemplarily, in one embodiment, the first lamp bead 1 includes a first solid crystal area 17, which is an integral structure, and a plurality of first LED chips 13 are fixed in the first solid crystal area 17. Based on the above method, the area of ​​the first solid crystal area 17 can be increased, the heat dissipation effect can be improved, and the reliability of the two-in-one TOP LED lamp bead can be improved.

[0067] Specifically, in some embodiments, the second lamp bead 2 further includes a second crystal-fixing area 27, and the second crystal-fixing area 27 is connected or not connected to the second pin 24. Exemplarily, in one embodiment, the second lamp bead 2 includes a second crystal-fixing area 27, which is an integral structure, and a plurality of second LED chips 23 are fixed in the second crystal-fixing area 27. Based on the above method, the area of ​​the second crystal-fixing area 27 can be increased, the heat dissipation effect can be improved, and the reliability of the two-in-one TOP LED lamp bead can be improved.

[0068] Preferably, in some embodiments, the first LED chip 13 includes a first red LED chip 131, a first green LED chip 132 and a first blue LED chip 133; the first lamp bead 1 includes three first solid crystal areas 17, which are respectively used to fix the first red LED chip 131, the first green LED chip 132 and the first blue LED chip 133; the first lamp bead 1 includes three first pins 14, which are respectively used to electrically connect the positive poles of the first red LED chip 131, the first green LED chip 132 and the first blue LED chip 133; the first lamp bead 1 includes a third pin 16, which is used to electrically connect the negative poles of the first red LED chip 131, the first green LED chip 132 and the first blue LED chip 133.

[0069] Preferably, in some embodiments, the second LED chip 23 includes a second red LED chip 231, a second green LED chip 232, and a second blue LED chip 233; the second lamp bead 2 includes three second solid crystal areas 27, which are respectively used to fix the second red LED chip 231, the second green LED chip 232, and the second blue LED chip 233. The second lamp bead 2 includes three second pins 24, which are respectively used to electrically connect the positive electrodes of the second red LED chip 231, the second green LED chip 232, and the second blue LED chip 233; the second lamp bead 2 includes a fourth pin 26, which is used to electrically connect the negative electrodes of the second red LED chip 231, the second green LED chip 232, and the second blue LED chip 233.

[0070] Specifically, in some embodiments of the present invention, the TOP LED lamp bead also includes a first lens colloid and a second lens colloid (not shown in the figure), which are respectively arranged on the first encapsulation colloid 15 and the second encapsulation colloid 25. Specifically, the first lens colloid and the first encapsulation colloid 15 can be an integrated structure or a split structure. Similarly, the second lens colloid and the second encapsulation colloid 25 can be an integrated structure or a split structure. The tops of the first lens colloid and the second lens colloid are spherical or ellipsoidal, which can further improve the brightness.

[0071] Correspondingly, an embodiment of the present invention further discloses a method for preparing a two-in-one TOP LED lamp bead, which is used to prepare the above-mentioned two-in-one TOP LED lamp bead, and comprises the following steps:

[0072] (1) stamping and stretching the metal substrate to obtain a first metal bracket and a second metal bracket, respectively, wherein the first metal bracket includes a pin portion, and the second metal bracket includes a second pin 24;

[0073] The metal substrate material may be copper foil, but is not limited thereto.

[0074] Specifically, after a stamping process and a stretching process commonly used in the art, unnecessary parts of the metal substrate may be removed to form a first metal bracket and a second metal bracket.

[0075] (2) forming a first bracket 12 and a first reflector cup 11 by injection molding on the first metal bracket, and forming a second bracket 22 and a second reflector cup 21 by injection molding on the second metal bracket;

[0076] (3) bending the pin portion to form a first pin 14;

[0077] (4) Fixing the first LED chip 13 in the first reflective cup 11 and fixing the second LED chip 23 in the second reflective cup 21;

[0078] (5) forming a first encapsulating colloid 15 and a second encapsulating colloid 25 to obtain a first lamp bead 1 and a second lamp bead 2;

[0079] (6) Splitting light from the first lamp bead 1 and the second lamp bead 2;

[0080] (7) Connect the first lamp bead 1 and the second lamp bead 2 after the splitting.

[0081] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. A two-in-one TOP LED lamp bead, characterized in that: It comprises a first lamp bead and a second lamp bead which are separately packaged and color-separated, and the first lamp bead and the second lamp bead are detachably connected; The first lamp bead comprises a first reflector cup, a first bracket, at least one first LED chip, at least one first pin and a first packaging colloid; the first reflector cup is arranged on the first bracket and surrounds the first LED chip, a first connecting portion extends from a side of the first bracket close to the second lamp bead, the first pin is at least partially exposed at the top of the first connecting portion, and the first pin is bent and abuts against the bottom surface of the first bracket; The second lamp bead comprises a second reflector cup, a second bracket, at least one second LED chip, at least one second pin and a second packaging colloid; the second reflector cup is arranged on the second bracket and surrounds the second LED chip, a second connecting portion extends from a side of the second reflector cup close to the first lamp bead, and the second pin is at least partially exposed at the bottom of the second connecting portion; After the first lamp bead and the second lamp bead are connected, the first pin exposed at the top of the first connecting portion and the second pin exposed at the bottom of the second connecting portion contact each other to form an electrical connection.

2. The two-in-one TOP LED lamp bead as claimed in claim 1, characterized in that: The first pin exposed at the top of the first connection portion is welded to the second pin exposed at the bottom of the second connection portion.

3. The two-in-one TOP LED lamp bead as claimed in claim 1, characterized in that: After the first lamp bead and the second lamp bead are connected, the second connecting portion partially or completely covers the first connecting portion.

4. The two-in-one TOP LED lamp bead as claimed in claim 1, characterized in that: The first pin comprises a first embedded portion, a first exposed portion and a second exposed portion which are connected in sequence, the first exposed portion is arranged above the first connecting portion, one end of the second exposed portion is arranged on a side surface of the first bracket, and the other end is bent and abuts against a bottom surface of the first bracket; and / or The second pin includes a second embedded portion and a third exposed portion which are connected in sequence. The third exposed portion is arranged below the second connecting portion and extends toward the first lamp bead.

5. The two-in-one TOP LED lamp bead as claimed in claim 4, characterized in that: The third exposed portion is provided with a bent portion bent upward, so that the first reflector cup is flush with the second reflector cup after the first lamp bead is connected with the second lamp bead.

6. The two-in-one TOP LED lamp bead according to any one of claims 1 to 5, characterized in that: The first lamp bead further includes at least one third pin, one end of the third pin is arranged on the front side of the first bracket, and the other end is bent to abut against the back side of the first bracket; the first pin and the third pin are arranged on both sides of the first LED chip; and / or The second lamp bead also includes a fourth pin, one end of which is bonded to the front side of the second bracket, and the other end is bent to abut against the back side of the second bracket; the second pin and the fourth pin are arranged on both sides of the second LED chip.

7. The two-in-one TOP LED lamp bead according to any one of claims 1 to 5, characterized in that: The first lamp bead further includes at least one first crystal-fixing area, and the first crystal-fixing area is connected or not connected to the first pin; and / or The second lamp bead further includes a second crystal-bonding area, and the second crystal-bonding area is connected or not connected to the second pin.

8. The two-in-one TOP LED lamp bead as claimed in claim 7, characterized in that: The first LED chips include a first red LED chip, a first green LED chip and a first blue LED chip; The first lamp bead includes three first pins, which are respectively used to electrically connect the positive electrodes of the first red LED chip, the first green LED chip and the first blue LED chip; the first lamp bead includes a third pin, which is used to electrically connect the negative electrodes of the first red LED chip, the first green LED chip and the first blue LED chip; The first lamp bead includes three first crystal fixing areas, which are respectively used to fix the first red LED chip, the first green LED chip and the first blue LED chip; The second LED chip includes a second red LED chip, a second green LED chip and a second blue LED chip; The second lamp bead includes three second pins, which are respectively used to electrically connect the positive electrodes of the second red LED chip, the second green LED chip and the second blue LED chip; the second lamp bead includes a fourth pin, which is used to electrically connect the negative electrodes of the second red LED chip, the second green LED chip and the second blue LED chip; The second lamp bead includes three second crystal fixing areas, which are respectively used to fix the second red LED chip, the second green LED chip and the second blue LED chip.

9. A method for preparing a two-in-one TOP LED lamp bead, used for preparing the two-in-one TOP LED lamp bead as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: (1) stamping and stretching a metal substrate to obtain a first metal bracket and a second metal bracket, respectively, wherein the first metal bracket includes a pin portion, and the second metal bracket includes a second pin; (2) forming a first bracket and a first reflector cup by injection molding on the first metal bracket, and forming a second bracket and a second reflector cup by injection molding on the second metal bracket; (3) bending the pin portion to form a first pin; (4) fixing the first LED chip in the first reflective cup, and fixing the second LED chip in the second reflective cup; (5) forming a first encapsulating colloid and a second encapsulating colloid to obtain a first lamp bead and a second lamp bead; (6) Splitting light from the first lamp bead and the second lamp bead; (7) Connect the first lamp bead and the second lamp bead after the splitting.

10. A display screen, characterized in that: It comprises the two-in-one TOP LED lamp bead as described in any one of claims 1 to 8.

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