Integrated LED lamp bead
By integrating LED lamp bead structure and utilizing logic judgment circuit and intelligent backup circuit for automatic switching, the system abnormality problem caused by LED lamp bead damage is solved, power efficiency is improved and cost is reduced, making it suitable for lighting and display backlight systems.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI RUIJINGSHENG ELECTRONIC TECHNOLOGY CO LTD
- Filing Date
- 2025-04-02
- Publication Date
- 2026-04-21
AI Technical Summary
When LED chips are used in series/parallel applications, the failure of a single chip can cause the entire system to malfunction. In addition, there are problems such as low power efficiency, unstable power supply, complex circuit board design, and high cost.
It adopts an integrated LED lamp bead structure, including LED light-emitting chip, anode pin, cathode pin, logic determination circuit and intelligent backup circuit. The logic determination circuit detects abnormal voltage or current, shuts down the first switching transistor and turns on the second switching transistor, and activates the load resistor or backup LED chip to ensure the normal operation of the lighting system.
It enables automatic switching to backup circuit when the LED light-emitting chip malfunctions, ensuring the normal operation of the lighting system. It simplifies the structure, reduces costs, improves power efficiency and design simplicity, and is suitable for various lighting and display backlighting systems.
Smart Images
Figure CN224154389U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of LED technology, and in particular to an integrated LED lamp bead. Background Technology
[0002] With the continuous development of LED electronic products, the output of electronic products is increasing, product models are becoming more diversified, and competition is becoming increasingly fierce. This leads to increasingly higher requirements for high-density, high-performance, and low-cost product packaging. Meanwhile, in LED market applications, LED chips are typically used in series or parallel configurations. These chips require series current-limiting resistors, resulting in relatively low power efficiency. When used on long circuit boards, voltage drop issues, unstable power supply, and variations in circuit board resistance can all affect the brightness of the LED. Furthermore, in series / parallel applications, the failure of a single LED chip can cause the entire system to malfunction. Currently, external driver chips and resistors are used, resulting in complex and costly circuit board designs. Therefore, there is an urgent need to develop a low-cost, high-efficiency solution. Utility Model Content
[0003] The purpose of this utility model is to address the problem in existing LED lamp bead products where the failure of a single LED bead causes malfunctions in the entire system when LED lamp beads are connected in series or parallel, and to provide an integrated LED lamp bead.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0005] An integrated LED lamp bead includes an LED light-emitting chip, an anode pin and a cathode pin, as well as a logic determination circuit and an intelligent backup circuit;
[0006] The LED light-emitting chip, the intelligent backup circuit, and the logic determination circuit are connected in parallel between the anode pin and the cathode pin.
[0007] The intelligent backup circuit includes a load resistor or a backup LED chip;
[0008] The logic determination circuit includes a first switching transistor and a second switching transistor. The first switching transistor is connected in series with the LED light-emitting chip, and the second switching transistor is connected in series with the intelligent backup circuit.
[0009] The integrated LED bead described in this utility model has the following properties: when the LED light-emitting chip malfunctions, the logic determination circuit detects an abnormal voltage or current. The logic determination circuit then shuts down the first switching transistor and turns on the second switching transistor to conduct the intelligent backup circuit according to a set threshold, thereby activating the load resistor or the backup LED chip to ensure the normal operation of the lighting system. This integrated LED bead has a simple structure, is easy to use, and has good performance. It can be widely used in various lighting systems, display backlight systems, and other fields.
[0010] As a preferred embodiment of this invention, the first switching transistor is a BJT, MOSFET, or JFET, and the second switching transistor is a BJT, MOSFET, or JFET.
[0011] As a preferred technical solution of this utility model, the integrated LED lamp bead further includes a current acquisition circuit, the LED light-emitting chip, the intelligent backup circuit and the logic determination circuit are respectively connected to the current acquisition circuit, and the current acquisition circuit and the logic determination circuit are respectively connected to the cathode pin.
[0012] As a further preferred technical solution of this utility model, the current acquisition circuit includes a current acquisition resistor; the first switching transistor is connected between the LED light-emitting chip and the current acquisition resistor; and the second switching transistor is connected between the intelligent backup circuit and the current acquisition resistor.
[0013] As a further preferred technical solution of this utility model, when the intelligent backup circuit includes the load resistor, the logic determination circuit, the current acquisition circuit and the load resistor are integrated into an integrated circuit chip.
[0014] As a further preferred technical solution of this utility model, the LED light-emitting chip and the integrated circuit chip are disposed on a metal frame; the metal frame is connected to the cathode pin; the anode pin is connected to the LED light-emitting chip and the integrated circuit chip respectively through wires; the LED light-emitting chip is connected to the integrated circuit chip through the wires; the integrated circuit chip is connected to the metal frame through the wires.
[0015] As a further preferred technical solution of this utility model, when the intelligent backup circuit includes a backup LED chip, the logic determination circuit and the current acquisition circuit are integrated into an integrated circuit chip.
[0016] As a further preferred technical solution of this utility model, the LED light-emitting chip, the integrated circuit chip, and the spare LED chip are disposed on a metal frame; the metal frame is connected to the cathode pin; the anode pin is connected to the LED light-emitting chip, the integrated circuit chip, and the spare LED chip respectively through wires; the LED light-emitting chip and the spare LED chip are respectively connected to the integrated circuit chip through the wires; the integrated circuit chip is connected to the metal frame through the wires.
[0017] As a further preferred technical solution of this utility model, the metal frame, the anode pin and the cathode pin are encapsulated in a package, and the anode pin and the cathode pin extend out of the package; the package is provided with a light-emitting window, and the LED light-emitting chip is located in the light-emitting window.
[0018] As a further preferred technical solution of this utility model, the metal frame and the cathode pin are integrally formed.
[0019] As a further preferred technical solution of this utility model, the encapsulation body is made of epoxy resin components.
[0020] As a further preferred technical solution of this utility model, several integrated LED beads are arranged in parallel and / or in series on a circuit board.
[0021] As a further preferred technical solution of this utility model, the integrated circuit chip also includes a power supply circuit and a drive circuit.
[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:
[0023] The integrated LED bead of this utility model, when the LED light-emitting chip is abnormal, the logic determination circuit detects the voltage or current abnormality, and the logic determination circuit shuts down the first switching transistor and turns on the second switching transistor to conduct the intelligent backup circuit according to the set threshold, and activates the load resistor or the backup LED chip to ensure the normal operation of the lighting system. The integrated LED bead has a simple structure, is easy to use, and has good effect, and can be widely used in various lighting systems, display backlight systems and other fields. Attached Figure Description
[0024] Figure 1 A schematic diagram illustrating the principle of integrated LED beads;
[0025] Figure 2 This is a schematic diagram of a logic decision circuit and an intelligent backup circuit.
[0026] Figure 3 This is a schematic diagram of another logic decision circuit and an intelligent backup circuit.
[0027] Figure 4 This is a schematic diagram of the logic decision circuit.
[0028] Figure 5 This is a schematic diagram of an integrated LED lamp bead structure;
[0029] Figure 6 This is a schematic diagram of another type of integrated LED chip structure;
[0030] Figure 7 This is a schematic diagram of a parallel connection of LED beads.
[0031] Figure 8 This is a schematic diagram of an LED lamp bead series connection application.
[0032] The diagram is labeled as follows: 1-LED light-emitting chip, 2-power supply circuit, 3-current acquisition circuit, 31-drive circuit, 32-current acquisition resistor, 4-logic determination circuit, 41-first switching transistor, 42-second switching transistor, 43-voltage and current acquisition and analysis circuit, 44-reference voltage circuit, 45-operational amplifier, 5-intelligent backup circuit, 51-load resistor, 52-backup LED chip, 6-anode pin, 7-cathode pin, 8-integrated circuit chip, 9-wire, 10-package, 11-light-emitting window, 12-circuit board, 13-positive power supply, 14-negative power supply. Detailed Implementation
[0033] The present invention will be further described in detail below with reference to experimental examples and specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.
[0034] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.
[0035] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.
[0036] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.
[0037] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.
[0038] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.
[0039] In related technologies, in existing LED lamp bead products, when LED lamp beads are used in series / parallel connections, the failure of one lamp bead will cause the entire system to malfunction. Therefore, the technical solution of this application was developed, and will be discussed below in conjunction with... Figures 1 to 8 To elaborate.
[0040] Example 1
[0041] like Figure 1 As shown, the integrated LED lamp bead of this utility model includes an LED light-emitting chip 1, a current acquisition circuit 3, a logic determination circuit 4, an intelligent backup circuit 5, an anode pin 6, and a cathode pin 7.
[0042] like Figure 1 As shown, the anode pin 6 is connected to the LED light-emitting chip 1, the intelligent backup circuit 5, and the logic determination circuit 4, respectively. The LED light-emitting chip 1, the intelligent backup circuit 5, and the logic determination circuit 4 are connected to the current acquisition circuit 3, respectively. The current acquisition circuit 3 and the logic determination circuit 4 are connected to the cathode pin 7, respectively.
[0043] like Figure 2 or Figure 3 As shown, the intelligent backup circuit 5 includes a load resistor 51 or a backup LED chip 52; the logic determination circuit 4 includes a first switch 41 and a second switch 42, the first switch 41 is connected in series with the LED chip 1, and the second switch 42 is connected in series with the intelligent backup circuit 5; wherein, the first switch 41 is a BJT, MOSFET or JFET, and the second switch 42 is a BJT, MOSFET or JFET.
[0044] like Figure 2 or Figure 3 As shown, the current acquisition circuit 3 includes a current acquisition resistor 32; the first switching transistor 41 is connected between the LED light-emitting chip 1 and the current acquisition resistor 32; the second switching transistor 42 is connected between the intelligent backup circuit 5 and the current acquisition resistor 32. That is, the LED light-emitting chip 1 and the intelligent backup circuit 5 share the current acquisition resistor 32.
[0045] like Figure 4 As shown, the logic determination circuit 4 further includes a voltage and current acquisition and analysis circuit 43, a reference voltage circuit 44, and an operational amplifier 45. The anode pin 6 is connected to the voltage and current acquisition and analysis circuit 43, which is connected to two reference voltage circuits 44. Each reference voltage circuit 44 is connected to one operational amplifier 45. One operational amplifier 45 is connected to the first switching transistor 41 and the cathode pin 7, and the other operational amplifier 45 is connected to the second switching transistor 42 and the cathode pin 7. The reference voltage circuit 44 sets a threshold value, and the voltage and current acquisition and analysis circuit 43 acquires the system voltage and current, and controls the LED switch according to the set threshold value.
[0046] When the LED chip 1 is working, the voltage and current acquisition and analysis circuit 43 determines whether the circuit is working normally based on the acquired working voltage and current at both ends of the LED chip 1.
[0047] When the voltage and current acquisition and analysis circuit 43 detects that the voltage across the LED chip 1 is higher than a certain set threshold, it determines that the LED circuit is in an open circuit or high resistance state, thereby turning off the first switch 41 and turning on the second switch 42, and starting the intelligent backup circuit 5 of the backup system.
[0048] When the voltage and current acquisition and analysis circuit 43 detects that the voltage across the LED chip 1 is lower than a certain set threshold, it determines that the LED circuit is in a short circuit or low resistance state, thereby turning off the first switch 41 and turning on the second switch 42, and starting the intelligent backup circuit 5 of the backup system.
[0049] like Figure 2 and Figure 5 As shown, when the intelligent backup circuit 5 includes the load resistor 51, the logic determination circuit 4, the current acquisition circuit 3, and the load resistor 51 are integrated into an integrated circuit chip 8.
[0050] like Figure 3 and Figure 6 As shown, when the intelligent backup circuit 5 includes a backup LED chip 52, the logic determination circuit 4 and the current acquisition circuit 3 are integrated into an integrated circuit chip 8.
[0051] The integrated LED bead described in this embodiment has the following characteristics: when the LED light-emitting chip 1 malfunctions, the logic determination circuit 4 detects an abnormal voltage or current. The logic determination circuit 4 shuts down the first switching transistor 41 and turns on the second switching transistor 42 to conduct the intelligent backup circuit 5 according to a set threshold, thereby enabling the load resistor 51 or the backup LED chip 52 to ensure the normal operation of the lighting system. This integrated LED bead has a simple structure, is easy to use, and has good performance. It can be widely used in various lighting systems, display backlight systems, and other fields.
[0052] Example 2
[0053] like Figure 2 and Figure 5 As shown, in the integrated LED lamp bead of this utility model, based on embodiment 1, when the intelligent backup circuit 5 includes the load resistor 51, the LED light-emitting chip 1 and the integrated circuit chip 8 are disposed on a metal frame.
[0054] The metal frame is connected to the cathode pin 7; the anode pin 6 is connected to the LED light-emitting chip 1 and the integrated circuit chip 8 respectively through wires 9; the LED light-emitting chip 1 is connected to the integrated circuit chip 8 through the wires 9; the integrated circuit chip 8 is connected to the metal frame through the wires 9; in this embodiment, the metal frame and the cathode pin 7 are integrally formed.
[0055] The metal frame, the anode pin 6 and the cathode pin 7 are encapsulated in the package 10, and the anode pin 6 and the cathode pin 7 extend out of the package 10; the package 10 is provided with a light-emitting window 11, and the LED light-emitting chip 1 is located in the light-emitting window 11; the package 10 is made of epoxy resin.
[0056] Example 3
[0057] like Figure 3 and Figure 6 As shown, in the integrated LED lamp bead of this utility model, based on embodiment 1, when the intelligent backup circuit 5 includes a backup LED chip 52, the LED light-emitting chip 1, the integrated circuit chip 8 and the load 52 are disposed on a metal frame.
[0058] The metal frame is connected to the cathode pin 7; the anode pin 6 is connected to the LED light-emitting chip 1, the integrated circuit chip 8 and the spare LED chip 52 respectively via wires 9; the LED light-emitting chip 1 and the spare LED chip 52 are respectively connected to the integrated circuit chip 8 via wires 9; the integrated circuit chip 8 is connected to the metal frame via wires 9; in this embodiment, the metal frame and the cathode pin 7 are integrally formed.
[0059] The metal frame, the anode pin 6 and the cathode pin 7 are encapsulated in the package 10, and the anode pin 6 and the cathode pin 7 extend out of the package 10; the package 10 is provided with a light-emitting window 11, and the LED light-emitting chip 1 is located in the light-emitting window 11; the package 10 is made of epoxy resin.
[0060] Example 4
[0061] like Figure 7 and Figure 8 As shown, the integrated LED lamp bead of this utility model, based on any one of Embodiments 1 to 3, has several integrated LED lamp beads connected in parallel and / or in series on the circuit board 12.
[0062] in, Figure 7 The example illustrates the parallel application of LED beads. The circuit board 12 is provided with a positive power supply 13 and a negative power supply 14. The anode pin 6 of all integrated LED beads is connected to the positive power supply 13 and the cathode pin 7 is connected to the negative power supply 14. The positive power supply 13 and the negative power supply 14 can be made of copper busbars. Figure 8An example of a series connection of LED beads is given. The circuit board 12 has a positive power supply 13 and a negative power supply 14 at its two ends, respectively. The anode pin 6 of the integrated LED bead is connected to the cathode pin 7 of the adjacent integrated LED bead, which can be connected by a copper component. Of the two integrated LED beads located at both ends, the anode pin 6 of one integrated LED bead is connected to the positive power supply 13, and the cathode pin 7 of the other integrated LED bead is connected to the negative power supply 14. In this art, the integrated LED beads can also be connected in series and then in parallel.
[0063] Example 5
[0064] Existing technologies often employ multiple LED chips connected in series or parallel, requiring a current-limiting resistor in series, resulting in low power efficiency. Furthermore, when used on long circuit boards, voltage drop issues, unstable power supply, and variations in circuit board resistance can all affect the brightness of the LED. This embodiment aims to address these technical problems.
[0065] like Figure 1 , Figures 5 to 8 As shown, the integrated LED bead of this utility model, based on any one of embodiments 1 to 4, further includes a power supply circuit 2 and a driving circuit 31 in the integrated circuit chip 8.
[0066] like Figure 1 As shown, the anode pin 6 is connected to the LED light-emitting chip 1, the power supply circuit 2, and the intelligent backup circuit 5, respectively. The LED light-emitting chip 1 is connected to the driving circuit 31. The power supply circuit 2 is connected to the current acquisition circuit 3 and the logic determination circuit 4, respectively. The intelligent backup circuit 5 is connected to the current acquisition circuit 3 and the logic determination circuit 4, respectively. The driving circuit 31 is connected to the current acquisition circuit 3 and the logic determination circuit 4, respectively. The logic determination circuit 4 is connected to the current acquisition circuit 3, and the current acquisition circuit 3 and the logic determination circuit 4 are connected to the cathode pin 7, respectively.
[0067] The power supply circuit 2, the current acquisition circuit 3, the driving circuit 31, and the logic determination circuit 4 can be integrated into an integrated circuit chip 8.
[0068] The integrated LED bead described in this embodiment controls the current flowing through the LED light-emitting chip 1 by setting the power supply circuit 2, the current acquisition circuit 3, the driving circuit 31, and the logic determination circuit 4, thereby achieving brightness consistency when multiple LED beads are used. This greatly simplifies design and operation. The LED beads are compatible with different input voltages, the system has high-precision constant current, and it is simple to use. When applied, there is no need for series current-limiting resistors and driving chips, which improves luminous efficiency. When the power supply is unstable, long circuit boards cause voltage drop problems, or the circuit board resistance is affected, the brightness of the LED lamp will not be affected.
[0069] The integrated LED bead described in this embodiment has a simple design for the circuit board 12 because it does not have external driver chips and resistors. A single-sided design can be used to further improve efficiency and reduce costs.
[0070] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An integrated LED lamp bead, comprising an LED light-emitting chip (1), an anode pin (6), and a cathode pin (7), characterized in that, It also includes a logic decision circuit (4) and an intelligent backup circuit (5); The LED light-emitting chip (1), the intelligent backup circuit (5), and the logic determination circuit (4) are connected in parallel between the anode pin (6) and the cathode pin (7); The intelligent backup circuit (5) includes a load resistor (51) or a backup LED chip (52); The logic determination circuit (4) includes a first switch (41) and a second switch (42). The first switch (41) is connected in series with the LED light-emitting chip (1), and the second switch (42) is connected in series with the intelligent backup circuit (5).
2. The integrated LED lamp bead according to claim 1, wherein, The first switch (41) is a BJT, MOSFET or JFET, and the second switch (42) is a BJT, MOSFET or JFET.
3. The integrated LED lamp bead of claim 1, wherein, It also includes a current acquisition circuit (3), the LED light-emitting chip (1), the intelligent backup circuit (5) and the logic determination circuit (4) are respectively connected to the current acquisition circuit (3), and the current acquisition circuit (3) and the logic determination circuit (4) are respectively connected to the cathode pin (7).
4. The integrated LED lamp bead according to claim 3, characterized in that, The current acquisition circuit (3) includes a current acquisition resistor (32); The first switching transistor (41) is connected between the LED light-emitting chip (1) and the current-collecting resistor (32); The second switch (42) is connected between the intelligent backup circuit (5) and the current acquisition resistor (32).
5. The integrated LED lamp bead according to claim 3, wherein, When the intelligent backup circuit (5) includes the load resistor (51), the logic determination circuit (4), the current acquisition circuit (3) and the load resistor (51) are integrated into an integrated circuit chip (8).
6. The integrated LED lamp bead of claim 5, wherein, The LED light-emitting chip (1) and the integrated circuit chip (8) are mounted on a metal frame; The metal frame is connected to the cathode pin (7); The anode pin (6) is connected to the LED light-emitting chip (1) and the integrated circuit chip (8) respectively via wires (9); The LED light-emitting chip (1) is connected to the integrated circuit chip (8) through the wire (9); The integrated circuit chip (8) is connected to the metal frame via the wire (9).
7. The integrated LED lamp bead according to claim 3, characterized in that, When the intelligent backup circuit (5) includes a backup LED chip (52), the logic determination circuit (4) and the current acquisition circuit (3) are integrated into an integrated circuit chip (8).
8. The integrated LED lamp bead of claim 7, wherein, The LED light-emitting chip (1), the integrated circuit chip (8), and the spare LED chip (52) are mounted on a metal frame; The metal frame is connected to the cathode pin (7); The anode pin (6) is connected to the LED light-emitting chip (1), the integrated circuit chip (8) and the spare LED chip (52) respectively via wires (9); The LED light-emitting chip (1) and the spare LED chip (52) are respectively connected to the integrated circuit chip (8) through the wire (9); The integrated circuit chip (8) is connected to the metal frame via the wire (9).
9. The integrated LED lamp bead according to claim 6 or 8, characterized in that, The metal frame, the anode pin (6) and the cathode pin (7) are encapsulated in a package (10), and the anode pin (6) and the cathode pin (7) extend out of the package (10); The package (10) is provided with a light-emitting window (11), and the LED light-emitting chip (1) is located inside the light-emitting window (11).
10. The integrated LED lamp bead of claim 9, wherein, Several integrated LED beads are connected in parallel and / or in series on the circuit board (12).