Two-in-one LED lamp bead and preparation method thereof

Abstract

The present invention discloses a two-in-one LED lamp bead and a method for manufacturing the same. The two-in-one LED lamp bead comprises: a bracket terminal; the bracket terminal comprises a first lamp bead terminal, a second lamp bead terminal, and a reinforcement terminal located between the first and second lamp bead terminals; the first and second lamp bead terminals are arranged along a first direction; the reinforcement terminal is located between the first and second lamp bead terminals and extends along a second direction; and the first and second directions intersect. The technical solution of the present invention can increase the thrust of the LED display lamp bead pins, preventing the lamp from falling off during transportation or installation and disassembly, thereby improving the reliability of the LED display and reducing maintenance costs.

Description

Technical Field

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

[0002] With the continuous advancement of technology and the gradual maturity of the market, the LED rental display industry is experiencing increasing development opportunities. LED rental displays are primarily used in large-scale theatrical performances, major sporting events, high-end conferences, and large-scale exhibitions. Furthermore, with the explosive growth of rental displays with fine pitch (lamp pitch P ≤ 2.6mm), the LED rental display market is expanding into even more sectors. Overall, fine pitch rental displays will be a key product in the LED rental market over the next three to five years. The future growth and prosperity of the LED rental market will primarily depend on the technological maturity and cost control of fine pitch products.

[0003] Currently, small-pitch rental screens on the market primarily utilize single-lamp and four-in-one solutions. However, single-lamp solutions have limitations in practical application. Due to product size constraints, their pins are designed to be small, resulting in a pin thrust of approximately 1.3-1.6 kg. The standard thrust of rental LED beads is approximately 4-7 kg. To increase this thrust, P2.6 pixel pitch screens require external shields to enhance the protection of LED components and prevent external forces from causing them to fall during transportation, installation, and disassembly, which can increase costs.

[0004] The four-in-one product is designed with multiple pins and has the characteristics of large thrust, which is suitable for rental product applications. However, due to the design of integrating multiple lamp beads into one, it has problems such as poor display effect, appearance consistency, low yield, and high cost, and cannot be widely accepted by the market. Summary of the Invention

[0005] The present invention provides a two-in-one LED lamp bead and a preparation method thereof to solve the problems existing in the prior art, thereby increasing the thrust of the LED display lamp bead pins and preventing the lamp from falling off during transportation or installation and disassembly, thereby improving the reliability of the LED display and reducing maintenance costs.

[0006] In a first aspect, the present invention provides a two-in-one LED lamp bead, comprising: a bracket terminal;

[0007] The bracket terminal includes a first lamp bead terminal, a second lamp bead terminal, and a reinforcement terminal located between the first lamp bead terminal and the second lamp bead terminal;

[0008] The first lamp bead terminal and the second lamp bead terminal are arranged along a first direction; the reinforcement terminal is located between the first lamp bead terminal and the second lamp bead terminal, and the reinforcement terminal extends along a second direction; the first direction and the second direction intersect.

[0009] Optionally, the reinforcement terminal includes a first pin, a second pin and a pin reinforcement portion;

[0010] Two opposite ends of the pin reinforcement portion along the second direction are respectively connected to the first pin and the second pin; the pin reinforcement portion is used to reinforce the first pin and the second pin.

[0011] Optionally, the pin reinforcement portion is serrated on two opposite sides along the first direction.

[0012] Optionally, the first lamp bead terminal includes a first red light functional area, a first green light functional area, a first blue light functional area, a first welding wire functional area, a third pin, a fourth pin, a fifth pin and a sixth pin;

[0013] The first red light functional area is connected to the third pin; the first green light functional area is connected to the fourth pin; the first blue light functional area is connected to the fifth pin; and the first bonding wire functional area is connected to the sixth pin.

[0014] Optionally, the second lamp bead terminal includes a second red light functional area, a second green light functional area, a second blue light functional area, a second welding wire functional area, a seventh pin, an eighth pin, a ninth pin and a tenth pin;

[0015] The second red light functional area is connected to the seventh pin; the second green light functional area is connected to the eighth pin; the second blue light functional area is connected to the ninth pin; and the second bonding wire functional area is connected to the tenth pin.

[0016] Optionally, the two-in-one LED lamp bead further includes: a first bowl cup, a second bowl cup and a lamp bead beam wrapping the bracket terminal;

[0017] The first bowl cup covers the first lamp bead terminal; the second bowl cup covers the second lamp bead terminal; and the lamp bead beam covers the reinforcement terminal.

[0018] Optionally, the thickness T1 of the lamp bead beam in the third direction has a value range of: 0.6mm≤T1≤0.65mm; the difference ΔT between the thickness T1 of the lamp bead beam and the thickness T2 of the cup mouth of the first bowl cup in the third direction has a value range of: 0.35mm≤ΔT≤0.38mm; the third direction is perpendicular to the first direction and the second direction.

[0019] Optionally, the first bowl cup, the second bowl cup and the lamp bead beam are formed by an injection molding process;

[0020] When forming the first bowl cup, the second bowl cup and the lamp bead beam, a protruding structure is used to support the reinforcing terminal.

[0021] Optionally, the two-in-one LED lamp bead further includes: a first lamp bead and a second lamp bead, wherein the first lamp bead includes a first red light chip, a first green light chip and a first blue light chip; the second lamp bead includes a second red light chip, a second green light chip and a second blue light chip;

[0022] The first red light chip and the second red light chip are vertical structure chips; the first green light chip, the second green light chip, the first blue light chip and the second blue light chip are horizontal structure chips.

[0023] Optionally, the cathode of the first red light chip is fixed to the first red light functional area via conductive glue; the first green light chip is fixed to the first green light functional area via insulating glue; the first blue light chip is fixed to the first blue light functional area via insulating glue; the cathode of the first green light chip is connected to the first green light functional area via a bonding wire; and the cathode of the first blue light chip is connected to the first blue light functional area via a bonding wire.

[0024] The cathode of the second red chip is fixed to the second red functional area via conductive adhesive; the second green chip is fixed to the second green functional area via insulating adhesive; the second blue chip is fixed to the second blue functional area via insulating adhesive; the cathode of the second green chip is connected to the second green functional area via a bonding wire; the cathode of the second blue chip is connected to the second blue functional area via a bonding wire;

[0025] The positive electrode of the first red light chip, the positive electrode of the first green light chip, and the positive electrode of the first blue light chip are respectively connected to the first bonding wire functional area through bonding wires; the positive electrode of the second red light chip, the positive electrode of the second green light chip, and the positive electrode of the second blue light chip are respectively connected to the second bonding wire functional area through bonding wires.

[0026] In a second aspect, the present invention further provides a method for preparing a two-in-one LED lamp bead, which is used to prepare any of the two-in-one LED lamp beads described above, comprising:

[0027] According to the design drawings, a bracket terminal is formed by a stamping process; the bracket terminal includes a first lamp bead terminal, a second lamp bead terminal, and a reinforcement terminal located between the first lamp bead terminal and the second lamp bead terminal; the first lamp bead terminal and the second lamp bead terminal are arranged along a first direction; the reinforcement terminal is located between the first lamp bead terminal and the second lamp bead terminal, and the reinforcement terminal extends along a second direction; the first direction and the second direction intersect;

[0028] The bracket terminal is placed in an injection mold, and a first bowl cup, a second bowl cup and a lamp bead beam are formed through an injection molding process; the first bowl cup covers the first lamp bead terminal; the second bowl cup covers the second lamp bead terminal; and the lamp bead beam covers the reinforcement terminal;

[0029] Bend the injection-molded bracket terminal to form the bracket terminal of the two-in-one LED lamp bead;

[0030] A first lamp bead and a second lamp bead are provided, and the first lamp bead and the second lamp bead are connected at corresponding positions.

[0031] According to the technical solution of the present invention, the bracket terminal of the two-in-one LED lamp bead includes a first lamp bead terminal, a second lamp bead terminal and a reinforcement terminal located between the first lamp bead terminal and the second lamp bead terminal, the first lamp bead terminal is used to install the first lamp bead, and the second lamp bead terminal is used to install the second lamp bead; the reinforcement terminal is used to improve the pin strength of the LED bracket, by arranging the first lamp bead terminal and the second lamp bead terminal along the first direction, the reinforcement terminal is located between the first lamp bead terminal and the second lamp bead terminal, and the reinforcement terminal extends along the second direction, wherein the first direction and the second direction intersect, so that the reinforcement terminal, the first lamp bead terminal and the second lamp bead terminal are all bonded to the module substrate, thereby increasing the bonding area between the bracket terminal of the LED lamp bead and the module substrate, thereby increasing the thrust of the LED display screen, in this way, it can prevent the LED display screen from falling off during transportation or installation and disassembly, causing the LED display screen module to fail to work normally, so that the LED display screen can present a more perfect display effect, which is beneficial to improving the customer's viewing experience and at the same time, it can reduce maintenance costs.

[0032] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 A schematic structural diagram of a bracket terminal for a two-in-one LED lamp bead provided in an embodiment of the present invention;

[0035] Figure 2 A schematic diagram of the front structure of a two-in-one LED lamp bead provided in an embodiment of the present invention;

[0036] Figure 3 A schematic diagram of the side structure of a two-in-one LED lamp bead provided in an embodiment of the present invention;

[0037] Figure 4 A schematic diagram of the back structure of a two-in-one LED lamp bead provided in an embodiment of the present invention;

[0038] Figure 5 A front view of the core of the injection mold for the two-in-one LED lamp bead provided in an embodiment of the present invention;

[0039] Figure 6 A front view of the rear mold core of the injection mold for a two-in-one LED lamp bead provided in an embodiment of the present invention;

[0040] Figure 7 A front view of the front mold core of the injection mold for the two-in-one LED lamp bead provided in an embodiment of the present invention;

[0041] Figure 8 A top view of a portion of the front mold core structure of an injection mold for a two-in-one LED lamp bead provided in an embodiment of the present invention;

[0042] Figure 9 A comparison chart of thrust value data for three types of LED lamp beads provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0044] It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present invention described herein can be practiced in an order other than that illustrated or described herein.

[0045] Figure 1 This embodiment provides a two-in-one LED lamp bead, with reference to Figure 1 As shown, the two-in-one LED lamp bead includes: a bracket terminal 1; the bracket terminal 1 includes a first lamp bead terminal 10, a second lamp bead terminal 20, and a reinforcement terminal 30 located between the first lamp bead terminal 10 and the second lamp bead terminal 20; the first lamp bead terminal 10 and the second lamp bead terminal 20 are arranged along a first direction L1; the reinforcement terminal 30 is located between the first lamp bead terminal 10 and the second lamp bead terminal 20 and extends along a second direction L2. The first direction L1 and the second direction L2 intersect.

[0046] The bracket terminal 1 is used to bond the LED lamp bead to the module substrate. The first lamp bead terminal 10 is used to install the first lamp bead, and the second lamp bead terminal 20 is used to install the second lamp bead. The first lamp bead terminal 10 and the second lamp bead terminal 20 are bonded to the module substrate via pins. The reinforcement terminal 30 is also bonded to the module substrate via pins to enhance the pin strength of the LED lamp bead bracket terminal 1 to prevent the LED display screen from losing lights during transportation or installation and disassembly, which may cause the LED display screen module to malfunction.

[0047] The first and second lamp bead terminals 10, 20 are arranged along a first direction L1, so that when multiple two-in-one LED lamp beads are bonded to the module substrate, the LED lamp beads can form a lamp bead array, thereby ensuring a good display effect. The reinforcement terminal 30 is provided between the first and second lamp bead terminals 10, 20, so that the reinforcement terminal 30 is located in the middle of the two-in-one LED lamp bead, thereby evenly improving the pin strength of the two-in-one LED lamp bead bracket.

[0048] The intersection of the first direction L1 and the second direction L2 may include an acute angle, a right angle or an obtuse angle between the first direction L1 and the second direction L2. In an exemplary embodiment, a right angle is formed between the first direction L1 and the second direction L2, thereby maximizing the pin strength of the LED bracket and reducing the difficulty of preparing the bracket terminal 1.

[0049] In this embodiment, the bracket terminal of the two-in-one LED lamp bead includes a first lamp bead terminal, a second lamp bead terminal and a reinforcement terminal located between the first lamp bead terminal and the second lamp bead terminal. The first lamp bead terminal is used to install the first lamp bead, and the second lamp bead terminal is used to install the second lamp bead; the reinforcement terminal is used to improve the pin strength of the LED bracket, by arranging the first lamp bead terminal and the second lamp bead terminal along the first direction, the reinforcement terminal is located between the first lamp bead terminal and the second lamp bead terminal, and the reinforcement terminal extends along the second direction, wherein the first direction and the second direction intersect, so that the reinforcement terminal, the first lamp bead terminal and the second lamp bead terminal are all bonded to the module substrate, thereby increasing the bonding area between the bracket terminal of the LED lamp bead and the module substrate, thereby increasing the thrust of the LED display screen. In this way, the LED display screen can be prevented from falling off during transportation or installation and disassembly, which may cause the LED display screen module to fail to work normally, so that the LED display screen can present a more perfect display effect, which is beneficial to improving the customer's viewing experience and at the same time, can reduce maintenance costs.

[0050] Optional, continue to refer to Figure 1 As shown, the reinforcement terminal 30 includes a first pin 31, a second pin 32 and a pin reinforcement portion 33. The pin reinforcement portion 33 is connected to the first pin 31 and the second pin 32 at opposite ends along the second direction L2. The pin reinforcement portion 33 is used to reinforce the first pin 31 and the second pin 32.

[0051] The first pin 31 and the second pin 32 are bonded to the module substrate to enhance the pin strength of the two-in-one LED lamp bead holder. The pin reinforcement portion 33 is connected to the first pin 31 and the second pin 32 at opposite ends along the second direction L2, respectively, to enhance the strength of the first pin 31 and the second pin 32, thereby preventing the first pin 31 and the second pin 32 from falling off the holder terminal 1 under the action of thrust, thereby further enhancing the pin strength of the two-in-one LED lamp bead holder.

[0052] Optional, continue to refer to Figure 1 As shown, the pin reinforcement portion 33 has a sawtooth shape at two opposite sides along the first direction L1.

[0053] Specifically, the pin reinforcement portion 33 is on opposite sides along the first direction L1, that is, on opposite sides facing the first lamp bead terminal 10 and the second lamp bead terminal 20 respectively. By making the pin reinforcement portion 33 have a serrated shape on opposite sides along the second direction L2, since there is plastic above the pin reinforcement portion 33 after the injection molding is completed, the bonding force between the plastic and the pin reinforcement portion 33 is increased, thereby further strengthening the strength of the first pin 31 and the second pin 32.

[0054] Optional, Figure 2 This is a schematic diagram of the front structure of a two-in-one LED lamp bead provided in an embodiment of the present invention. Figure 3 This is a side structural diagram of a two-in-one LED lamp bead provided by an embodiment of the present invention. Figure 4 This is a schematic diagram of the back structure of the two-in-one LED lamp bead provided in an embodiment of the present invention, refer to Figure 2-Figure 4 As shown, the two-in-one LED lamp bead also includes: a first bowl cup 4, a second bowl cup 5 and a lamp bead beam 6 that wrap the bracket terminal 1. The first bowl cup 4 covers the first lamp bead terminal 10, the second bowl cup 5 covers the second lamp bead terminal 20, and the lamp bead beam 6 covers the reinforcement terminal 30, so that the bracket terminal 1 of the two-in-one LED lamp bead can be wrapped by plastic, thereby preventing the bracket terminal 1 from being oxidized.

[0055] The first cup 4, the second cup 5, and the lamp beam 6 are integrally formed. In one exemplary embodiment, the first cup 4, the second cup 5, and the lamp beam 6 are formed by injection molding. The first cup 4 is used to mount the first red chip, the first green chip, and the first blue chip on the first lamp terminal 10, and the second cup 5 is used to mount the second red chip, the second green chip, and the second blue chip on the second lamp terminal 20.

[0056] Optional, continue to refer to Figure 2-Figure 4 As shown, the thickness T1 of the lamp bead beam 6 in the third direction L3 has a value range of: 0.6mm≤T1≤0.65mm, and the difference ΔT between the thickness T1 of the lamp bead beam 6 and the thickness T2 of the cup mouth of the first bowl cup 4 in the third direction L3 has a value range of: 0.35mm≤ΔT≤0.38mm.

[0057] The third direction L3 is perpendicular to the first direction L1 and the second direction L2 and is the thickness direction of the two-in-one LED lamp bead.

[0058] It is understood that the minimum thickness of the lamp bead mask is 0.5mm, and the thickness requirement of the lamp bead mask is T≤0.15mm to meet the requirements of the lamp surface angle and thus meet the display effect. By ensuring that the thickness T1 of the lamp bead beam 6 in the third direction L3 satisfies 0.6mm≤T1≤0.65mm, the difference ΔT between the thickness T1 of the lamp bead beam 6 and the thickness T2 of the cup mouth of the first bowl 4 in the third direction L3 satisfies 0.35mm≤ΔT≤0.38mm, thereby meeting the thickness and height requirements of the lamp bead mask.

[0059] Optional, Figure 5 A front view of the core of the injection mold for the two-in-one LED lamp bead provided in an embodiment of the present invention, Figure 6 This is a front view of the rear mold core of the injection mold for the two-in-one LED lamp bead provided in an embodiment of the present invention. Figure 7 This is a front view of the front mold core of the injection mold for the two-in-one LED lamp bead provided in an embodiment of the present invention. Figure 8A top view of a partial structure of the front mold core of the injection mold for the two-in-one LED lamp bead provided in an embodiment of the present invention, with reference to Figure 5-Figure 8 As shown, the first bowl cup 4, the second bowl cup 5 and the lamp bead beam 6 are formed by an injection molding process; when the first bowl cup 4, the second bowl cup 5 and the lamp bead beam 6 are formed, a protruding structure a is used to support the reinforcing terminal 30.

[0060] Among them, the first bowl cup 4, the second bowl cup 5 and the lamp bead beam 6 are formed by an injection molding process using an injection mold. Specifically, the bracket terminal 1 of the two-in-one LED lamp bead is placed in the injection mold, and the melted plastic particles are controlled to be fed simultaneously from the first glue feeding point b and the second glue feeding point c of the front mold core, so that the plastic fills the entire cavity of the injection mold to form the first bowl cup 4, the second bowl cup 5 and the lamp bead beam 6.

[0061] It should be noted that a protruding structure a is provided at a position corresponding to the reinforcing terminal 30 in the rear mold core of the injection mold, so that during the injection molding process, the protruding structure a can support the reinforcing terminal 30. Specifically, the protruding structure a supports the pin reinforcing portion 33 of the reinforcing terminal 30 to prevent the pin reinforcing portion 33 from being punched up under the impact of the plastic, thereby making it impossible for the pin reinforcing portion 33 to play a role in reinforcing the strength of the first pin 31 and the second pin 32, thereby resulting in poor strength of the first pin 31 and the second pin 32. Therefore, by adopting a protruding structure a to support the reinforcing terminal 30, the strength of the first pin 31 and the second pin 32 can be improved, thereby further improving the thrust of the two-in-one LED lamp bead.

[0062] In an optional embodiment, a two-in-one LED lamp bead includes a first lamp bead 01 and a second lamp bead 02, the first lamp bead includes a first red light chip 011, a first green light chip 012 and a first blue light chip 013, and the second lamp bead includes a second red light chip 021, a second green light chip 022 and a second blue light chip 023.

[0063] Optional, continue to refer to Figure 1 As shown, the first lamp bead terminal 10 includes a first red light functional area 11, a first green light functional area 12, a first blue light functional area 13, a first welding wire functional area 14, a third pin 15, a fourth pin 16, a fifth pin 17 and a sixth pin 18; the first red light functional area 11 is connected to the third pin 15; the first green light functional area 12 is connected to the fourth pin 16; the first blue light functional area 13 is connected to the fifth pin 17; and the first welding wire functional area 14 is connected to the sixth pin 18.

[0064] The first red light functional area 11 is used to place the first red light chip 011. The first red light functional area 11 is connected to the third pin 15, so that the first red light functional area 11 can be electrically connected to the third pin 15. Similarly, the first green light functional area 12 is used to place the first green light chip 012. The first green light functional area 12 is connected to the fourth pin 16, so that the first green light functional area 12 can be electrically connected to the fourth pin 16. The first blue light functional area 13 is used to place the first blue light chip 013. The first blue light functional area 13 is electrically connected to the fifth pin 17, so that the first blue light functional area 13 can be electrically connected to the fifth pin 17. The first wire bonding functional area 14 is connected to the sixth pin 18. By welding the bonding wire connecting the positive pole of each chip to the first wire bonding functional area 14, the positive pole of each chip in the first lamp bead terminal 10 can be electrically connected to the sixth pin 18.

[0065] In an optional embodiment, the first green light functional area 12 is multiplexed as the first green light bonding area, and the first blue light functional area 13 is multiplexed as the first blue light bonding area, so that the cathode of the first green light chip 012 is welded to the first green light bonding area through a bonding wire, and then the cathode of the first green light chip 012 is electrically connected to the fourth pin 16, and the cathode of the first blue light functional area 13 is welded to the first blue light bonding area through a bonding wire, and then the cathode of the first blue light chip 013 is electrically connected to the fifth pin 17.

[0066] Optional, continue to refer to Figure 1 As shown, the second lamp bead terminal 20 includes a second red light functional area 21, a second green light functional area 22, a second blue light functional area 23, a second welding wire functional area 24, a seventh pin 25, an eighth pin 26, a ninth pin 27 and a tenth pin 28; the second red light functional area 21 is connected to the seventh pin 25; the second green light functional area 22 is connected to the eighth pin 26; the second blue light functional area 23 is connected to the ninth pin 27; and the second welding wire functional area 24 is connected to the tenth pin 28.

[0067] The second lamp bead terminal 20 is similar to the first lamp bead terminal 10. The second red light functional area 21 of the second lamp bead terminal 20 is used to accommodate the second red light chip 021. The second red light functional area 21 is connected to the seventh pin 25, so that the second red light functional area 21 can be electrically connected to the seventh pin 25. The second green light functional area 22 is used to accommodate the second green light chip 022. The second green light functional area 22 is connected to the eighth pin 26, so that the second green light functional area 22 can be electrically connected to the eighth pin 26. The second blue light functional area 23 is used to accommodate the second blue light chip 023. The second blue light functional area 23 is electrically connected to the ninth pin 27, so that the second blue light functional area 23 can be electrically connected to the ninth pin 27. The second wire bonding functional area 24 is connected to the tenth pin 28. By bonding the bonding wires connecting the electrodes of the chips in the second lamp bead terminal 20 to the second wire bonding functional area 24, the positive electrodes of the chips can be electrically connected to the tenth pin 28.

[0068] In an optional embodiment, the second green light functional area 22 is multiplexed as the second green light bonding area, and the second blue light functional area 23 is multiplexed as the second blue light bonding area, so that the electrode of the second green light chip 022 is welded to the second green light bonding area through a bonding wire, and then the electrode of the second green light chip 022 is electrically connected to the eighth pin 26, and the cathode of the second blue light functional area 23 is welded to the second blue light bonding area through a bonding wire, and then the cathode of the second blue light chip 023 is electrically connected to the ninth pin 27.

[0069] Optionally, the first red light chip 011 and the second red light chip 021 are vertical structure chips, and the first green light chip 012, the second green light chip 022, the first blue light chip 013 and the second blue light chip 023 are horizontal structure chips, thereby improving the luminous efficiency of the red light in the first lamp bead and the second lamp bead, and at the same time, improving the reliability of the first lamp bead.

[0070] Optionally, the negative electrode of the first red light chip 011 is fixed to the first red light functional area 11 through conductive glue, such as silver glue, the first green light chip 012 is fixed to the first green light functional area 12 through insulating glue, the first blue light chip 013 is fixed to the first blue light functional area 13 through insulating glue, the negative electrode of the second red light chip 021 is fixed to the second red light functional area 21 through conductive glue, the second green light chip 022 is fixed to the second green light functional area 22 through insulating glue, and the second blue light chip 023 is fixed to the second blue light functional area 23 through insulating glue, thereby improving the heat dissipation capacity and life of the first red light chip 011 and the second red light chip 021, thereby improving the reliability and stability of the two-in-one LED lamp bead.

[0071] In an optional embodiment, the cathode of the first green light chip 012 is connected to the first green light functional area 12 via a bonding wire; the cathode of the first blue light chip 013 is connected to the first blue light functional area 13 via a bonding wire; the cathode of the second green light chip 022 is connected to the second green light functional area 22 via a bonding wire, and the cathode of the second blue light chip 023 is connected to the second blue light functional area 23 via a bonding wire; the anode of the first red light chip 011, the anode of the first green light chip 012, and the anode of the first blue light chip 013 are respectively connected to the first wire bonding functional area 14 via bonding wires, and the anode of the second red light chip 021, the anode of the second green light chip 022, and the anode of the second blue light chip 023 are respectively connected to the second wire bonding functional area 24 via bonding wires.

[0072] Among them, since the first green light functional area 12 is connected to the fourth pin 16, the first blue light functional area 13 is connected to the fifth pin 17, and the first wire bonding functional area 14 is connected to the sixth pin 18, the cathode of the first green light chip 012 is connected to the fourth pin 16 through the first green light functional area 12, the cathode of the first blue light chip 013 is connected to the fifth pin 17 through the first blue light functional area 13, and the anodes of the first red light chip 011, the first green light chip 012, and the first blue light chip 013 are connected to the sixth pin 18 through the first wire bonding functional area 14. In other words, the first green light chip 012 and the first blue light chip 013 are respectively fixed. The cathode pads of the first red chip 011, the first green chip 012, and the first blue chip 013 are located in the independent first green light functional area 12 and the first blue light functional area 13, so that they exist independently and are not connected. In this way, when electron migration occurs at the cathodes of the first green chip 012 and the first blue light chip, the cathode pads of the first red chip 011, the first green chip 012, and the first blue light chip 013 are prevented from being connected, thereby preventing the negative-to-negative short circuit between the first green chip 012 and the first blue light chip 013. This can avoid the occurrence of dark spots in green light or dark spots in blue light, and thus prevent the problem of red and green lights being lit in series or red and blue lights being lit in series.

[0073] Similarly, since the second lamp bead has the same structure as the first lamp bead, the second lamp bead also has the above-mentioned beneficial effects. The similarities can be referred to the above description and will not be repeated here.

[0074] Figure 9 This is a comparison chart of thrust values ​​of three LED lamp beads provided by the embodiment of the present invention. Figure 9As shown, the prepared two-in-one LED lamp beads, the existing eight-pin two-in-one LED lamp beads, and the existing four-pin LED lamp beads were subjected to thrust tests using an automatic thrust machine. The lifting height of the pusher of the automatic thrust machine was 500μm, the forward speed of the pusher was 50μm / s, and the forward distance was 400μm. It can be found that the pin thrust value of the two-in-one LED lamp beads provided in this embodiment is the largest, reaching 4.44Kgf. Compared with the eight-pin two-in-one LED lamp beads, the pin thrust of the two-in-one LED lamp beads provided in this embodiment is increased by 22%; compared with the four-pin LED lamp beads, the pin thrust of the two-in-one LED lamp beads provided in this embodiment is increased by 177%. It can be seen that the two-in-one LED lamp beads provided in this embodiment can improve the ability to prevent bumps due to the large pin thrust, and effectively solve the problem of lamp falling due to low thrust during the installation and transportation of rental display screens.

[0075] Based on the same concept, this embodiment further provides a method for preparing a two-in-one LED lamp bead, which is used to prepare the two-in-one LED lamp bead provided in any of the above embodiments. The preparation method includes:

[0076] S10. According to the design drawings, the bracket terminals are formed by a stamping process.

[0077] The bracket terminal 1 includes a first lamp bead terminal 10, a second lamp bead terminal 20, and a reinforcement terminal 30 located between the first lamp bead terminal 10 and the second lamp bead terminal 20; the first lamp bead terminal 10 and the second lamp bead terminal 20 are arranged along a first direction L1; the reinforcement terminal 30 is located between the first lamp bead terminal 10 and the second lamp bead terminal 20, and the reinforcement terminal 30 extends along a second direction L2; the first direction L1 and the second direction L2 intersect.

[0078] S20, placing the bracket terminal into the injection mold, and forming the first bowl cup, the second bowl cup and the lamp bead beam through the injection molding process.

[0079] The first bowl cup 4 covers the first lamp bead terminal 10 ; the second bowl cup 5 covers the second lamp bead terminal 20 ; and the lamp bead cross beam 6 covers the reinforcement terminal 30 .

[0080] In an optional embodiment, when forming the first bowl cup 4, the second bowl cup 5 and the lamp bead cross beam 6, a protruding structure is used to support the reinforcing terminal 30. Exemplarily, a protruding structure is provided at a position corresponding to the reinforcing terminal 30 in the rear mold core of the injection mold, so that during the injection molding process, the protruding structure can support the reinforcing terminal 30. Specifically, the protruding structure supports the pin reinforcing portion 33 of the reinforcing terminal 30 to prevent the pin reinforcing portion 33 from being pushed up under the impact of the plastic, thereby making it impossible for the pin reinforcing portion 33 to play a role in reinforcing the strength of the first pin 31 and the second pin 32, thereby resulting in poor strength of the first pin 31 and the second pin 32. Therefore, by using a protruding structure to support the reinforcing terminal 30, the strength of the first pin 31 and the second pin 32 can be improved, thereby further improving the thrust of the two-in-one LED lamp bead.

[0081] S30, bending the injection-molded bracket terminal to form a bracket terminal for the two-in-one LED lamp bead.

[0082] S40: Provide a first lamp bead and a second lamp bead, and connect the first lamp bead and the second lamp bead at corresponding positions.

[0083] The first lamp bead includes a first red light chip 011 , a first green light chip 012 and a first blue light chip 013 , and the second lamp bead includes a second red light chip 021 , a second green light chip 022 and a second blue light chip 023 .

[0084] In an optional embodiment, the cathode of the first red light chip 011 is fixed to the first red light functional area 11 by conductive glue, the first green light chip 012 is fixed to the first green light functional area 12 by insulating glue, the first blue light chip 013 is fixed to the first blue light functional area 13 by insulating glue, the cathode of the second red light chip 021 is fixed to the second red light functional area 21 by conductive glue, the second green light chip 022 is fixed to the second green light functional area 22 by insulating glue, and the second blue light chip 023 is fixed to the second blue light functional area 23 by insulating glue. The cathode of the first green chip 012 is connected to the first green functional area 12 via a bonding wire; the cathode of the first blue chip 013 is connected to the first blue functional area 13 via a bonding wire; the cathode of the second green chip 022 is connected to the second green functional area 22 via a bonding wire, and the cathode of the second blue chip 023 is connected to the second blue functional area 23 via a bonding wire; the anode of the first red chip 011, the anode of the first green chip 012, and the anode of the first blue chip 013 are respectively connected to the first wire bonding functional area 14 via bonding wires, and the anode of the second red chip 021, the anode of the second green chip 022, and the anode of the second blue chip 023 are respectively connected to the second wire bonding functional area 24 via bonding wires, thereby avoiding the occurrence of green light dark spots or blue light dark spots, and thus eliminating the problem of red and green lights being lit in series or red and blue lights being lit in series.

[0085] In this embodiment, the bracket terminal includes a first lamp bead terminal, a second lamp bead terminal and a reinforcement terminal located between the first lamp bead terminal and the second lamp bead terminal. The first lamp bead terminal is used to install the first lamp bead, and the second lamp bead terminal is used to install the second lamp bead; the reinforcement terminal is used to improve the pin strength of the LED bracket, and the first lamp bead terminal and the second lamp bead terminal are arranged along the first direction, the reinforcement terminal is located between the first lamp bead terminal and the second lamp bead terminal, and the reinforcement terminal extends along the second direction, wherein the first direction and the second direction intersect, so that the reinforcement terminal, the first lamp bead terminal and the second lamp bead terminal are all bonded to the module substrate, thereby increasing the bonding area between the bracket terminal of the LED lamp bead and the module substrate, thereby increasing the thrust of the LED display screen. In this way, the LED display screen can be prevented from falling off during transportation or installation and disassembly, which may cause the LED display screen module to fail to work normally, so that the LED display screen can present a more perfect display effect, which is beneficial to improving the customer's viewing experience and at the same time, can reduce maintenance costs.

[0086] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A two-in-one LED lamp bead, characterized in that: include: Bracket terminal; The bracket terminal includes a first lamp bead terminal, a second lamp bead terminal, and a reinforcement terminal located between the first lamp bead terminal and the second lamp bead terminal; The first lamp bead terminal and the second lamp bead terminal are arranged along a first direction; the reinforcement terminal is located between the first lamp bead terminal and the second lamp bead terminal, and the reinforcement terminal extends along a second direction; the first direction and the second direction intersect; The reinforcement terminal includes a first pin, a second pin and a pin reinforcement portion; Two opposite ends of the pin reinforcement portion along the second direction are respectively connected to the first pin and the second pin; the pin reinforcement portion is used to reinforce the first pin and the second pin.

2. The two-in-one LED lamp bead according to claim 1, characterized in that: The pin reinforcement portion has a sawtooth shape at two opposite sides along the first direction.

3. The two-in-one LED lamp bead according to claim 1, characterized in that: The first lamp bead terminal includes a first red light functional area, a first green light functional area, a first blue light functional area, a first welding wire functional area, a third pin, a fourth pin, a fifth pin and a sixth pin; The first red light functional area is connected to the third pin; the first green light functional area is connected to the fourth pin; the first blue light functional area is connected to the fifth pin; and the first bonding wire functional area is connected to the sixth pin.

4. The two-in-one LED lamp bead according to claim 3, characterized in that: The second lamp bead terminal includes a second red light functional area, a second green light functional area, a second blue light functional area, a second welding wire functional area, a seventh pin, an eighth pin, a ninth pin and a tenth pin; The second red light functional area is connected to the seventh pin; the second green light functional area is connected to the eighth pin; the second blue light functional area is connected to the ninth pin; and the second bonding wire functional area is connected to the tenth pin.

5. The two-in-one LED lamp bead according to claim 4, characterized in that: Also includes: A first bowl cup, a second bowl cup and a lamp bead beam wrapping the bracket terminal; The first bowl covers the first lamp bead terminal; The second bowl covers the second lamp bead terminal; the lamp bead beam covers the reinforcement terminal.

6. The two-in-one LED lamp bead according to claim 5, characterized in that: The thickness T1 of the lamp beam in the third direction is in the range of 0.6mm≤T1≤0.65mm; the difference between the thickness T1 of the lamp beam and the thickness T2 of the cup mouth of the first bowl in the third direction is The value range of T is: 0.35mm≤ T≤0.38mm; the third direction is perpendicular to the first direction and the second direction.

7. The two-in-one LED lamp bead according to claim 5, characterized in that: The first bowl cup, the second bowl cup and the lamp bead beam are formed by an injection molding process; When forming the first bowl cup, the second bowl cup and the lamp bead beam, a protruding structure is used to support the reinforcing terminal.

8. The two-in-one LED lamp bead according to claim 5, characterized in that: Also includes: a first lamp bead and a second lamp bead, wherein the first lamp bead includes a first red light chip, a first green light chip, and a first blue light chip; and the second lamp bead includes a second red light chip, a second green light chip, and a second blue light chip; The first red light chip and the second red light chip are vertical structure chips; the first green light chip, the second green light chip, the first blue light chip and the second blue light chip are horizontal structure chips.

9. The two-in-one LED lamp bead according to claim 8, characterized in that: The cathode of the first red chip is fixed to the first red functional area via conductive adhesive; the first green chip is fixed to the first green functional area via insulating adhesive; the first blue chip is fixed to the first blue functional area via insulating adhesive; the cathode of the first green chip is connected to the first green functional area via a bonding wire; the cathode of the first blue chip is connected to the first blue functional area via a bonding wire; The cathode of the second red chip is fixed to the second red functional area via conductive adhesive; the second green chip is fixed to the second green functional area via insulating adhesive; the second blue chip is fixed to the second blue functional area via insulating adhesive; the cathode of the second green chip is connected to the second green functional area via a bonding wire; the cathode of the second blue chip is connected to the second blue functional area via a bonding wire; The positive electrode of the first red light chip, the positive electrode of the first green light chip, and the positive electrode of the first blue light chip are respectively connected to the first bonding wire functional area through bonding wires; the positive electrode of the second red light chip, the positive electrode of the second green light chip, and the positive electrode of the second blue light chip are respectively connected to the second bonding wire functional area through bonding wires.

10. A method for preparing a two-in-one LED lamp bead, for preparing the two-in-one LED lamp bead according to any one of claims 1 to 9, characterized in that: include: According to the design drawings, the bracket terminals are formed by stamping process; The bracket terminal includes a first lamp bead terminal, a second lamp bead terminal, and a reinforcement terminal located between the first lamp bead terminal and the second lamp bead terminal; the first lamp bead terminal and the second lamp bead terminal are arranged along a first direction; the reinforcement terminal is located between the first lamp bead terminal and the second lamp bead terminal, and the reinforcement terminal extends along a second direction; the first direction and the second direction intersect; The bracket terminal is placed in an injection mold, and a first bowl cup, a second bowl cup and a lamp bead beam are formed through an injection molding process; the first bowl cup covers the first lamp bead terminal; the second bowl cup covers the second lamp bead terminal; and the lamp bead beam covers the reinforcement terminal; Bend the injection-molded bracket terminal to form the bracket terminal of the two-in-one LED lamp bead; A first lamp bead and a second lamp bead are provided, and the first lamp bead and the second lamp bead are connected at corresponding positions.

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