Lamp-drive integrated LED drive circuit and LED device
By adding empty pins to the LED bead substrate and electrically connecting them, the substrate design is simplified, the cost is reduced, and the bonding strength between the device and the PCB board is increased, thus realizing the function of resuming interrupted transmission.
Patent Information
- Application Number
- CN202520291929.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-02-24
AI Technical Summary
Existing LED chip substrate designs require consideration of multiple pins, resulting in complex structures, high costs, and difficulty in implementing breakpoint resume functionality.
A new empty pin is added to the substrate, and the first input terminal is electrically connected to the empty pin to serve as an electroplated lead and signal line. At the same time, as part of the solder pad, the solder mask is removed, increasing the adhesion between the device and the PCB board.
It simplifies the substrate design, reduces costs, increases the bonding strength between the device and the PCB board, and enables breakpoint resume functionality.
Smart Images
Figure CN223744942U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to LED lamp pearl packaging technical field especially, a kind of LED driving circuit and LED device of lamp drive integration. BACKGROUND
[0002] Light emitting diode (LED) device of lamp drive integration to improve the reliability of LED lamp strip or screen system, will adopt the way of breakpoint continuation. Any integrated circuit (IC) in the system is damaged, it does not affect the normal work of other IC. If it has breakpoint continuation function, mainstream lamp pearl will have 5 pins, including power supply pin (VDD), ground pin (GND), first signal input pin (DI), second signal input pin (BI), signal output pin (DO). Because of 5 pins, the conventional design needs to consider 2 lead plating lines, and lead line needs to cover a layer of solder resist ink, so it will increase cost and design difficulty. UTILITARY MODEL
[0003] The utility model provides a kind of LED driving circuit and LED device of lamp drive integration, by adding an empty pin on the substrate, and the first input end is electrically connected with empty pin, when circuit is made, it acts as electroplating lead and signal line, simultaneously connection part can be as part of solder pad, without solder resist ink to cover, increase the bonding force of device and PCB board.
[0004] According to the first aspect of the utility model, a kind of LED driving circuit of lamp drive integration is provided, including: substrate and integrated circuit;
[0005] The integrated circuit is arranged on the first surface of the substrate, and the second surface of the substrate includes a first solder pad, a second solder pad, a third solder pad and a fourth solder pad;
[0006] The first solder pad and the third solder pad are located at the first edge of the second surface, and the second solder pad and the fourth solder pad are located at the second edge of the second surface, and the first edge is arranged opposite to the second edge;
[0007] The first solder pad is connected with the first input end, and the second solder pad is an empty pin;The first solder pad is electrically connected with the second solder pad;
[0008] The third solder pad is connected with the second input end, and the fourth solder pad is connected with the output end.
[0009] Optionally, the second surface of the substrate further includes a fifth solder pad and a sixth solder pad;
[0010] The fifth pad is disposed on the first edge, and the sixth pad is disposed on the second edge;
[0011] The fifth pad is connected to the power supply terminal, and the sixth pad is connected to the power ground terminal.
[0012] Optionally, the substrate is square.
[0013] Optionally, the side length of the substrate is 1.5mm-2mm.
[0014] Optionally, the size range of the first pad, the second pad, the third pad and the fourth pad is 0.3mm-0.4mm.
[0015] Optionally, the distance between the third pad and the sixth pad is greater than or equal to 0.6 mm.
[0016] According to a second aspect of the present invention, a lamp-drive integrated LED device is provided, comprising: at least one light-emitting unit and an LED driving circuit that integrates lamp and drive as described in any of the first aspects of the present invention.
[0017] Optionally, the light-emitting unit is disposed in the middle of the first surface of the substrate; the light-emitting unit is electrically connected to the integrated circuit.
[0018] Optionally, the light-emitting unit includes at least one of the following:
[0019] Red LED chips, green LED chips, and blue LED chips.
[0020] Optionally, a PCB board may also be included;
[0021] The connection method between the substrate and the PCB board includes at least one of the following: welding, pressing, and conductive adhesive.
[0022] This utility model discloses an integrated LED driver circuit, comprising: a substrate and an integrated circuit; the integrated circuit is disposed on a first surface of the substrate, and the second surface of the substrate includes a first pad, a second pad, a third pad, and a fourth pad; the first pad and the third pad are located at a first edge of the second surface, and the second pad and the fourth pad are located at a second edge of the second surface, with the first edge and the second edge being opposite to each other; the first pad is connected to a first input terminal, and the second pad is an empty pin; the first input terminal is electrically connected to the second pad; the third pad is connected to the second input terminal, and the fourth pad is connected to an output terminal. This utility model provides an integrated LED driver circuit and LED device. By adding an empty pin to the substrate and electrically connecting the first input terminal to the empty pin, it serves as an electroplated lead and signal line during circuit fabrication. Simultaneously, the connection portion can function as part of the pad, eliminating the need for solder resist masking and increasing the bonding strength between the device and the PCB board.
[0023] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a schematic diagram of the structure of an LED device in the prior art;
[0026] Figure 2 This is a schematic diagram of the first surface of the substrate in an LED driver circuit that integrates lamp and driver functions, provided in an embodiment of this utility model.
[0027] Figure 3 This is a schematic diagram of the second surface of the substrate in an LED driver circuit that integrates lamp and driver functions, provided in an embodiment of this utility model.
[0028] Figure 4 This is a schematic diagram of an integrated LED driver circuit provided in an embodiment of the present invention;
[0029] Figure 5 This is a schematic diagram of the structure of an integrated LED driver circuit provided in an embodiment of the present invention;
[0030] Figure 6 This is a schematic diagram of the structure of an LED device that integrates lamp driver and LED according to an embodiment of the present invention;
[0031] Figure 7 This is a schematic diagram of another LED device integrating lamp and driver provided in this embodiment of the present invention. Detailed Implementation
[0032] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0033] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0034] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.
[0035] Figure 1 This is a schematic diagram of the structure of an LED device in the prior art, for reference. Figure 1 The LED device has six pins: power supply terminal A, first signal input terminal B, second signal input terminal C, first signal output terminal D, second signal input terminal E, and power ground terminal F. All six pins are integrated on the back of the substrate. This pin arrangement results in some pins that are not conductive (e.g., ...). Figure 1 The first signal input terminal B and the first signal output terminal D in the circuit require additional conductive lines to be designed for electroplating so that the pins are covered with plating. This design method is relatively complex, requiring additional circuitry and the use of black solder resist ink to cover the circuitry. This adds a process to the fabrication of the printed circuit board (PCB), which is time-consuming and labor-intensive.
[0036] Figure 2 This is a schematic diagram of the first surface of the substrate in an LED driver circuit that integrates lamp and driver functions, provided in an embodiment of this utility model. Figure 3 This is a schematic diagram of the second surface of the substrate in an LED driver circuit that integrates lamp and driver functions, provided in an embodiment of this utility model. (Refer to...) Figure 2 and Figure 3 This utility model embodiment provides an LED driver circuit that integrates lamp and driver functions, including a substrate 1 and an integrated circuit IC; the integrated circuit IC is disposed on the first surface of the substrate 1 (e.g., ...). Figure 2 As shown), the second surface of substrate 1 (as shown) Figure 3As shown, it includes a first pad DI, a second pad NC, a third pad BI, and a fourth pad DO; the first pad DI and the third pad BI are located at the first edge of the second surface, and the second pad NC and the fourth pad DO are located at the second edge of the second surface, with the first edge and the second edge being opposite to each other; the first pad DI is connected to the first input terminal, and the second pad NC is an empty pin; the first pad DI and the second pad NC are electrically connected; the third pad BI is connected to the second input terminal, and the fourth pad DO is connected to the output terminal.
[0037] Specifically, "lamp-driver integration" refers to a design that integrates the LED lamp and the driver circuit together. Traditionally, the LED lamp and the driver circuit are separate, with the driver circuit responsible for converting AC power into DC power more suitable for LED operation. In the "lamp-driver integration" design, the driver circuit is integrated inside the LED lamp, forming a whole, which can achieve the technical effects of saving space and simplifying installation. The "lamp-driver integration" LED driver circuit provided by this utility model includes a substrate 1 and an integrated circuit IC. The integrated circuit IC is disposed on the first surface of the substrate 1. For example, the first surface can be the front functional area of the substrate 1. The second surface of the substrate 1 (for example, the second surface is the back of the substrate 1) includes a first pad DI, a second pad NC, a third pad BI, and a fourth pad DO. The first pad DI and the third pad BI are located at the first edge of the second surface (the first edge can be...). Figure 3 The second pad NC and the fourth pad DO are located at the second edge of the second surface (the second edge can be the left edge of the second surface). Figure 3 The first edge (left edge) and the second edge (right edge) are set opposite to each other. The first pad DI is connected to the first input terminal. The second pad NC is an empty pin. An empty pin is a pin that does not have any function or is not connected to the internal drive circuit. The third pad BI is connected to the second input terminal. The fourth pad DO is connected to the output terminal.
[0038] Figure 4 This is a schematic diagram of an integrated LED driver circuit according to an embodiment of the present invention. The integrated LED driver circuit provided in this embodiment can also achieve the function of "resume interrupted transmission," and the principle is as follows: Figure 4 As shown:
[0039] The system includes at least a first LED (L) and a second LED (M). The first pad (DI) is connected to the second pad (NC), which is an unused pin. The signal output from the first LED (L) (which can also be understood as the fourth pad (DO)) is transmitted to the first input of the second LED (M) (which can also be understood as the first pad (DI)). The signal transmitted from the first input of the first LED (L) is directly transmitted to the second input of the second LED (M) through the second pad (NC). Therefore, the second LED (M) simultaneously receives two sets of signals transmitted from the first LED (L). When any point on the first LED (L) experiences a break, the signal will continue to be transmitted to the second LED (M) from other points. The second LED (M) will not be affected by the interruption at any point on the first LED (L), thus achieving the technical effect of "breakpoint resumption." Figure 4 The transmission principle of two LED beads is taken as an example only. There can be N LED beads. This utility model embodiment does not limit this.
[0040] The LED driver circuit integrating lamp and driver provided in this embodiment of the utility model, through the addition of a new empty pin and the electrical connection between the first pad and the empty pin, can act as an electroplating lead during the fabrication of the substrate circuit. When the entire screen is assembled, it can act as a signal line to transmit signals to the next stage of LED beads. This not only achieves the technical effect of resuming interrupted transmission, but also allows the intermediate connection part (i.e., the electrical connection part between the first pad and the empty pin) to be used as part of the pad, eliminating the need for solder resist ink to cover it, and increasing the bonding strength between the device and the PCB board.
[0041] Figure 5 This is a schematic diagram of the structure of an integrated LED driver circuit according to an embodiment of the present invention. (Refer to...) Figure 5 Optionally, the second surface of the substrate 1 further includes a fifth pad VDD and a sixth pad GND; the fifth pad VDD is disposed at the first edge, and the sixth pad GND is disposed at the second edge; the fifth pad VDD is connected to the power supply terminal, and the sixth pad GND is connected to the power ground terminal.
[0042] Specifically, the substrate in the integrated LED driver circuit provided in this embodiment of the present invention also includes a fifth pad VDD and a sixth pad GND.
[0043] The fifth pad VDD is set at the first edge (which can be...). Figure 5 The sixth pad GND is set at the second edge (left edge of the middle), and can be the left edge of the middle. Figure 5 (Right edge of the middle), the fifth pad VDD is connected to the power supply terminal to receive the power signal sent by the power supply, and the sixth pad GND is connected to the power ground terminal. The positive terminal of the power supply is connected to the fifth pad VDD and output to the negative terminal of the power supply through the sixth pad GND, thus forming a complete current loop.
[0044] Optionally, substrate 1 is square.
[0045] Specifically, substrate 1 is set to be square, which can ensure that the brightness of various colors in the LED remains consistent.
[0046] Optionally, the side length of substrate 1 is 1.5mm-2mm.
[0047] Specifically, setting the side length of substrate 1 to 1.5mm-2mm can make the driving circuit more compact and save the space occupied by the driving circuit itself.
[0048] Optionally, the dimensions of the first pad DI, the second pad NC, the third pad BI, and the fourth pad DO range from 0.3mm to 0.4mm.
[0049] Specifically, the aperture width of each pad ranges from 0.3mm to 0.4mm. This design is applicable to a wide range of applications, including surface mount technology (SMT) and copper wire lamp applications. The aperture size of the pads can be changed according to the lamp chip package size.
[0050] Optionally, the distance between the third pad BI and the sixth pad GND is greater than or equal to 0.6 mm.
[0051] Specifically, the distance between the third pad BI and the sixth pad GND is greater than or equal to 0.6mm to ensure the stability of signal transmission in the drive circuit and to avoid the risk of short circuit. Preferably, the distance between the third pad BI and the sixth pad GND is greater than or equal to 0.6mm and less than or equal to 1.5mm.
[0052] Figure 6 This is a schematic diagram of the structure of an integrated lamp driver LED device provided in an embodiment of this utility model. (Refer to...) Figure 6 Based on the same concept, this utility model embodiment provides an LED device that integrates lamp and driver functions, including: at least one light-emitting unit Z and the LED driving circuit that integrates lamp and driver functions in any of the above utility model embodiments.
[0053] Optionally, the light-emitting unit Z is disposed in the middle of the first surface of the substrate; the light-emitting unit Z is electrically connected to the integrated circuit IC.
[0054] Specifically, the light-emitting unit Z is electrically connected to the integrated circuit IC to drive the light-emitting unit Z to emit light normally, thereby achieving the technical effect of resuming interrupted transmission.
[0055] Figure 7This is a schematic diagram of another LED device integrating lamp and driver provided by an embodiment of the present utility model. Optionally, the light-emitting unit Z includes at least one of the following: a red LED chip R, a green LED chip G, and a blue LED chip B.
[0056] Specifically, the light-emitting unit Z includes, but is not limited to, red LED chip R, green LED chip G, and blue LED chip B. This embodiment of the invention does not limit this, and the light-emitting chips of the light-emitting unit Z can be set as needed.
[0057] Optionally, it also includes a PCB board (not shown in the figure); the connection method between the substrate and the PCB board includes at least one of the following: soldering, pressing and conductive adhesive.
[0058] Specifically, a PCB is a printed circuit board. The connection methods between the substrate and the PCB include, but are not limited to: soldering (a process of connecting two or more metal parts together by melting solder (usually a tin-based alloy), crimping (a technique of connecting metal terminals to wires by mechanical pressure), and conductive adhesive (an adhesive with conductive properties, commonly used in electronic manufacturing and repair to replace traditional soldering or as a supplementary connection method).
[0059] The LED device with integrated lamp and driver provided in this embodiment of the present invention can achieve the same technical effect as the LED driver circuit with integrated lamp and driver provided in the above embodiment of the present invention, and will not be described again here.
[0060] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. A lamp and driver in one LED driver circuit, characterized by Comprising: a substrate and an integrated circuit; the integrated circuit is disposed on a first surface of the substrate, a second surface of the substrate comprises a first pad, a second pad, a third pad and a fourth pad; the first pad and the third pad are located at a first edge of the second surface, the second pad and the fourth pad are located at a second edge of the second surface, the first edge is disposed opposite to the second edge; the first pad is connected with a first input terminal, the second pad is a null pin; the first pad is electrically connected with the second pad; the third pad is connected with a second input terminal, the fourth pad is connected with an output terminal.
2. The LED driver circuit integrated with a lamp according to claim 1, wherein, the second surface of the substrate further comprises a fifth pad and a sixth pad; the fifth pad is disposed on the first edge, the sixth pad is disposed on the second edge; the fifth pad is connected with a power supply terminal, the sixth pad is connected with a power ground terminal.
3. The LED driver circuit integrated with a lamp according to claim 1, wherein, the substrate is a square.
4. The LED driver circuit integrated with a lamp according to claim 3, wherein, the side length of the substrate is 1.5mm-2mm.
5. The LED driver circuit integrated with a lamp according to claim 1, wherein, the size of the first pad, the second pad, the third pad and the fourth pad ranges from 0.3mm to 0.4mm.
6. The LED driver circuit of claim 2, wherein, the distance between the third pad and the sixth pad is greater than or equal to 0.6mm.
7. A light driver integrated LED device, characterized by Comprising: at least one light emitting unit and the LED driving circuit of any one of claims 1-6.
8. The LED-in-a-lamp device of claim 7, wherein, the light emitting unit is disposed on the middle of the first surface of the substrate; the light emitting unit is electrically connected with the integrated circuit.
9. The LED-in-a-lamp device of claim 8, wherein, the light emitting unit comprises at least one of the following: a red LED wafer, a green LED wafer and a blue LED wafer.
10. The LED-in-a-lamp device of claim 9, wherein, further comprising a PCB board; the connection mode of the substrate and the PCB board comprises at least one of the following: welding, pressure bonding and conductive glue.