LED lamp control circuit and bulb and lamp string applying the same

Abstract

The utility model discloses LED lamp control circuit and the bulb and the lamp string of application of this circuit, this scheme cleverly through rectifier module access commercial power supply, then again by voltage regulation module to the voltage of access power supply is regulated and controlled, then it is introduced MCU drive module and is powered, through MCU drive module to LED module carries out the working control to realize the synchronous or asynchronous work of multiple LED lamp pearl on LED module, when synchronous work, it can make multiple LED lamp pearl synchronous bright and dark, and when asynchronous work, can realize the light of flowing light lamp or other asynchronous working lamp effect, provide reliable hardware foundation for bulb as atmosphere to set off lamp, and after the circuit board of LED lamp control circuit setting and bulb, bulb can directly by commercial power supply, make it as lamp string use bulb, can not need further through external adapter and carry out power supply voltage regulation and control again power supply, this scheme is reliable and application nimble not only, has better market application prospect and value.

Description

Technical Field

[0001] This utility model relates to the field of bulb control circuits and lighting fixtures, and particularly to LED lamp control circuits and bulbs and light strings using the circuit. Background Technology

[0002] Light bulbs are commonly used for everyday lighting and creating ambiance, and are widely applied in various scenarios. LEDs are widely used in ambient lighting due to their low energy consumption, long lifespan, and convenient and compact packaging. However, most LED bulbs currently are low-voltage bulbs, requiring an external power adapter (transformer) to convert 220V AC to 12V / 24V DC. While this makes the bulbs safer to some extent, the need for an external adapter increases wiring complexity and raises hardware costs. Furthermore, the low voltage results in significant current attenuation. The length of a single LED strip is usually no more than 10 meters, otherwise there will be technical problems such as uneven brightness at the beginning and end. High-voltage LED lights can be directly connected to the mains power supply, which reduces the overall cost because it eliminates the need for an external power supply. Moreover, a single power supply can drive long-distance LED strips with high operational reliability. At the same time, because of its small voltage attenuation, it is suitable for scenarios such as holiday decorations and large-scale commercial lighting (such as building outlines and advertising signs). However, outdoor applications require a certain level of waterproof performance from the bulbs. Therefore, how to provide an LED bulb that is reliable, waterproof, and easy to install is a research topic with significant practical implications. Summary of the Invention

[0003] In view of this, the purpose of this utility model is to provide an LED lamp control circuit that is reliable in power supply, flexible in operation and has good packaging effect, as well as a bulb and a string of bulbs using this circuit.

[0004] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0005] An LED lamp control circuit includes a rectifier module, a step-down module, an MCU driver module, and an LED module;

[0006] The rectifier module is connected to the mains power supply and is used to supply power from the mains power. The step-down module is connected to the rectifier module, and the MCU driver module is connected to the step-down module. The step-down module steps down the mains power supplied to the rectifier module and then supplies power to the MCU driver module. The LED module is connected to the MCU driver module and is driven by the MCU driver module to operate. The LED module has multiple LED beads.

[0007] As one possible implementation, this solution further proposes that multiple LED beads be connected to the MCU driver module in series, parallel, or mixed connection.

[0008] As a preferred implementation option, the rectifier module of this solution includes a rectifier bridge DB1, pin 1 and pin 3 of the rectifier bridge DB1 are respectively connected to different wires of the external power supply line, pin 2 of the rectifier bridge DB1 is connected to the step-down module, and pin 4 of the rectifier bridge DB1 is grounded.

[0009] As a preferred implementation option, the rectifier module of this solution further includes a capacitor C1, with the two ends of the capacitor C1 connected to pins 1 and 3 of the rectifier bridge DB1, respectively.

[0010] As a preferred implementation option, the step-down module of this solution preferably includes a chip IC, diode D1, diode D2, capacitor C2, capacitor C3, capacitor C4 and inductor L1;

[0011] Specifically, the DRAIN pin of the chip IC and one end of capacitor C2 are connected to pin 2 of rectifier bridge DB1. The cathode of diode D1 and one end of capacitor C3 are both connected to the VCC pin of the chip IC. One end of inductor L1 is connected to the other end of capacitor C3 and the cathode of diode D2. The anode of diode D1, the other end of inductor L1, and one end of capacitor C4 are all connected to the MCU driver module. The GND pin of the chip IC, the other end of capacitor C4, the anode of diode D2, and the other end of capacitor C2 are all grounded.

[0012] As a preferred implementation option, the MCU driver module of this solution preferably includes an MCU chip, with the positive terminal of diode D1, the other end of inductor L1, and one end of capacitor C4 all connected to the VDD pin of the MCU chip; the MCU chip has multiple OUT pins for connecting to the LED module, and the GND pin of the MCU chip is grounded;

[0013] The LED module has multiple LED beads divided into one or more LED groups, and each LED group has one or more LED beads connected in series. One end of one or more LED groups is connected to one of the multiple OUT pins of the MCU chip, and the other end of one or more LED groups is grounded.

[0014] Based on the above, this solution also proposes a light bulb, which includes:

[0015] The lamp holder housing is a cylindrical shell structure with open ends. The lamp holder housing is made of conductive material and is used to connect with the lamp holder. One end of the lamp holder housing has a constricted structure.

[0016] The connector is made of insulating material and is disposed on the constricted structure of the lamp holder housing, with a through hole in the middle penetrating both ends of the connector;

[0017] A circuit board is fixedly connected to the connector and has the LED light control circuit described above on it.

[0018] The lampshade is a hollow structure with one end open. Its open end is connected to the lamp holder housing, fixing the connector and the circuit board relative to each other, and allowing the circuit board to extend at least partially into the lampshade.

[0019] One end of the circuit board has an extension that extends inside the lampshade to the end of the lampshade away from the lamp head housing. Multiple LED beads of the LED module are spaced apart on the extension. The circuit board is also provided with a first conductive element and a second conductive element for connecting to power supply. The first conductive element passes through the through hole of the connector and exits the lamp head housing. The second conductive element contacts the inner wall of the lamp head housing.

[0020] As a preferred implementation option, the connector in this solution is preferably made of an elastic insulating material, with one end forming a tapered protrusion. This protrusion protrudes from the constricted structure of the lamp holder housing, and the first conductive element is interference-fitted with the through hole.

[0021] As a preferred implementation option, the lamp holder housing described in this solution is preferably a threaded lamp holder structure.

[0022] Based on the above, this solution also proposes a light string, which includes the light bulbs mentioned above, wherein multiple light bulbs are connected in series, parallel or mixed.

[0023] Compared with the prior art, the present invention has the following advantages by adopting the above technical solution: The solution cleverly uses a rectifier module to connect to the mains power supply, then a step-down module to regulate the voltage of the connected power supply before introducing it into the MCU driver module for power supply. The MCU driver module controls the operation of the LED module, enabling synchronous or asynchronous operation of multiple LED beads on the LED module. In synchronous operation, multiple LED beads can be turned on and off simultaneously; in asynchronous operation, flowing light or other asynchronous lighting effects can be achieved, providing a reliable hardware foundation for the bulb as an ambient lighting fixture. Furthermore, with the LED control circuit integrated into the bulb's circuit board, the bulb can be directly powered by the mains power supply. Therefore, when used as a string bulb, it does not require further voltage regulation via an external adapter. This solution is not only reliable in implementation but also flexible in application, possessing superior market application prospects and value. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 unit module connection of the control circuit in this solution;

[0026] Figure 2 This is the circuit design diagram of the control circuit in this scheme;

[0027] Figure 3 This is a simplified three-dimensional schematic diagram of the bulb's implementation structure in this scheme;

[0028] Figure 4 This is a two-dimensional cross-sectional schematic diagram of the simplified implementation structure of the light bulb in this scheme. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are only for illustrating the present invention and do not limit the scope of the present invention. Similarly, the following embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0030] like Figure 1 As shown in the figure, this embodiment provides an LED lamp control circuit 100, which includes a rectifier module 110, a step-down module 120, an MCU driver module 130, and an LED module 140.

[0031] The rectifier module 110 is connected to the mains power supply and is used to supply power from the mains power. The step-down module 120 is connected to the rectifier module 110. The MCU driver module 130 is connected to the step-down module 120. The step-down module 120 steps down the mains power supplied to the rectifier module 110 and then supplies power to the MCU driver module 130. The LED module 140 is connected to the MCU driver module 130 and is driven by the MCU driver module 130 to operate. The LED module 140 has multiple LED beads.

[0032] In this solution, multiple LED beads can be connected in parallel (e.g., Figure 2 As shown), but it is not limited to this. Multiple LED beads can be connected to the MCU driver module in series or mixed connection (partial series and partial parallel).

[0033] exist Figure 1 Based on what is shown, focus on combining Figure 2 As shown, in terms of specific implementation circuit, as a preferred implementation option, the rectifier module 110 of this solution preferably includes a rectifier bridge DB1. Pins 1 and 3 of the rectifier bridge DB1 are respectively connected to different wires of the external power supply line, pin 2 of the rectifier bridge DB1 is connected to the step-down module, and pin 4 of the rectifier bridge DB1 is grounded.

[0034] In addition to the above, the rectifier module 110 of this solution also includes a capacitor C1, and the two ends of the capacitor C1 are respectively connected to the wires connected to pin 1 and pin 3 of the rectifier bridge DB1.

[0035] The step-down module 120 described in this solution includes a chip IC, diodes D1 and D2, capacitors C2, C3, and C4, and an inductor L1. The DRAIN pin of the chip IC and one end of capacitor C2 are connected to pin 2 of the rectifier bridge DB1. The cathode of diode D1 and one end of capacitor C3 are both connected to the VCC pin of the chip IC. One end of inductor L1 is connected to the other end of capacitor C3 and the cathode of diode D2. The anode of diode D1, the other end of inductor L1, and one end of capacitor C4 are all connected to the MCU driver module. The GND pin of the chip IC, the other end of capacitor C4, the anode of diode D2, and the other end of capacitor C2 are all grounded. The step-down module 120 allows for voltage regulation after mains power is applied, ensuring the reliability and stability of the MCU driver module 130 and the LED module 140.

[0036] The MCU driver module 130 described in this solution includes an MCU chip. The positive terminal of diode D1, the other end of inductor L1, and one end of capacitor C4 are all connected to the VDD pin of the MCU chip. The MCU chip has multiple OUT pins for connecting to the LED module, and the GND pin of the MCU chip is grounded. Figure 2 As shown in the embodiment, in this solution, the multiple OUT pins of the chip MCU are pin OUT1, pin OUT2... pin OUTN, which correspond to N groups of LED beads in the LED module and are then connected accordingly. In this way, the chip MCU can output different control signals through the OUT pins to realize the brightness and darkness of the LED beads. For example, through asynchronous control, a flowing light effect can be achieved.

[0037] The LED module 140 described in this solution has multiple LED beads divided into one or more LED groups, and each LED group has one or more LED beads connected in series. One end of one or more LED groups is connected to one of the multiple OUT pins of the MCU chip, and the other end of one or more LED groups is grounded.

[0038] exist Figure 1 , Figure 2 Based on what is shown, combined with Figure 3 or Figure 4 As shown, this solution also proposes a light bulb 200, which includes:

[0039] The lamp holder housing 210 is a cylindrical housing structure with open ends. The lamp holder housing 210 is made of conductive material and is used to connect with the lamp holder of an external power supply device. One end of the lamp holder housing 210 is a constricted structure 211. In this solution, the lamp holder housing 210 is a threaded lamp holder structure.

[0040] The connector 220 is made of insulating material. The connector 220 is disposed on the constricted structure 211 of the lamp holder housing 210, and a through hole 222 is provided in the middle of the connector through both ends.

[0041] The circuit board 230 is fixedly connected to the connector 220, and the LED lamp control circuit 100 described above is provided thereon.

[0042] The lampshade 240 is a hollow structure with one end open. Its open end is connected to the lamp holder housing 210, fixing the connector 220 and the circuit board 230 relative to each other, and allowing the circuit board 230 to extend at least partially into the lampshade 240.

[0043] The circuit board 230 has an extension 231 at one end, which extends within the lampshade 240 to the end of the lampshade 240 away from the lamp holder housing 210. Multiple LED beads of the LED module 140 are spaced apart on the extension 231. The circuit board 230 is also provided with a first conductive element 232 and a second conductive element 233 for connecting to power. The first conductive element 232 passes through the through hole 222 of the connector 220 through the lamp holder housing 210 to connect to the live wire of the mains power (directly or indirectly connecting the control circuit to the live wire). The second conductive element 233 contacts the inner wall of the lamp holder housing 210 so that when the lamp holder housing 210 is connected to the lamp holder, the neutral wire of the mains power is connected (directly or indirectly connecting the control circuit to the neutral wire).

[0044] To improve the sealing performance of the bulb 200, as a preferred implementation option, the connector 220 in this solution is preferably made of an elastic insulating material (e.g., silicone), with one end forming a tapered protrusion 221. This protrusion 221 protrudes from the constriction structure 211 of the lamp holder housing 210, and the first conductive element 232 is interference-fitted with the through hole 222. This method prevents external moisture from easily entering the lamp cover 240, improving the reliability of the bulb in outdoor applications.

[0045] Based on the above, the bulb 200 proposed in this solution can be used in light strings as a power source for ambient lighting. Multiple bulbs 200 can be implemented in series, parallel, or mixed configurations.

[0046] The above description is only a part of the embodiments of this utility model, and does not limit the scope of protection of this utility model. Any equivalent device or equivalent process transformation made based on the content of this utility model specification and drawings, or direct or indirect application in other related technical fields, are similarly included in the patent protection scope of this utility model.

Claims

1. An LED lamp control circuit, characterized in that, It includes a rectifier module, a buck converter module, an MCU driver module, and an LED module; The rectifier module is connected to the mains power supply and is used to supply power from the mains power. The step-down module is connected to the rectifier module, and the MCU driver module is connected to the step-down module. The step-down module steps down the mains power supplied to the rectifier module and then supplies power to the MCU driver module. The LED module is connected to the MCU driver module and is driven by the MCU driver module to operate. The LED module has multiple LED beads.

2. The LED lamp control circuit as described in claim 1, characterized in that, Multiple LED beads are connected to the MCU driver module in series, parallel or mixed connection.

3. The LED lamp control circuit as described in claim 1 or 2, characterized in that, The rectifier module includes a rectifier bridge DB1. Pins 1 and 3 of the rectifier bridge DB1 are respectively connected to different wires of the external power supply line. Pin 2 of the rectifier bridge DB1 is connected to the step-down module, and pin 4 of the rectifier bridge DB1 is grounded.

4. The LED lamp control circuit as described in claim 3, characterized in that, The rectifier module also includes a capacitor C1, with the two ends of the capacitor C1 connected to pins 1 and 3 of the rectifier bridge DB1, respectively.

5. The LED lamp control circuit as described in claim 3, characterized in that, The step-down module includes a chip IC, diode D1, diode D2, capacitor C2, capacitor C3, capacitor C4, and inductor L1; Specifically, the DRAIN pin of the chip IC and one end of capacitor C2 are connected to pin 2 of rectifier bridge DB1. The cathode of diode D1 and one end of capacitor C3 are both connected to the VCC pin of the chip IC. One end of inductor L1 is connected to the other end of capacitor C3 and the cathode of diode D2. The anode of diode D1, the other end of inductor L1, and one end of capacitor C4 are all connected to the MCU driver module. The GND pin of the chip IC, the other end of capacitor C4, the anode of diode D2, and the other end of capacitor C2 are all grounded.

6. The LED lamp control circuit as described in claim 5, characterized in that, The MCU driver module includes an MCU chip. The positive terminal of diode D1, the other end of inductor L1, and one end of capacitor C4 are all connected to the VDD pin of the MCU chip. The MCU chip has multiple OUT pins, which are used to connect to the LED module. The GND pin of the MCU chip is grounded. The LED module has multiple LED beads divided into one or more LED groups, and each LED group has one or more LED beads connected in series. One end of one or more LED groups is connected to one of the multiple OUT pins of the MCU chip, and the other end of one or more LED groups is grounded.

7. A light bulb, characterized in that: It includes: The lamp holder housing is a cylindrical shell structure with open ends. The lamp holder housing is made of conductive material and is used to connect with the lamp holder. One end of the lamp holder housing has a constricted structure. The connector is made of insulating material and is disposed on the constricted structure of the lamp holder housing, with a through hole in the middle penetrating both ends of the connector; A circuit board, fixedly connected to the connector, is provided with an LED lamp control circuit as described in any one of claims 1 to 6; The lampshade is a hollow structure with one end open. Its open end is connected to the lamp holder housing, fixing the connector and the circuit board relative to each other, and allowing the circuit board to extend at least partially into the lampshade. One end of the circuit board has an extension that extends inside the lampshade to the end of the lampshade away from the lamp head housing. Multiple LED beads of the LED module are spaced apart on the extension. The circuit board is also provided with a first conductive element and a second conductive element for connecting to power supply. The first conductive element passes through the through hole of the connector and exits the lamp head housing. The second conductive element contacts the inner wall of the lamp head housing.

8. The light bulb as claimed in claim 7, characterized in that, The connector is made of elastic insulating material, and one end of it forms a tapered protrusion. This protrusion protrudes from the constricted structure of the lamp holder housing, and the first conductive component is interference-fitted with the through hole.

9. The light bulb as claimed in claim 7, characterized in that, The lamp holder housing has a threaded lamp holder structure.

10. A string of lights, characterized in that, It includes a plurality of light bulbs as described in any one of claims 7 to 9, wherein the plurality of light bulbs are arranged in series, in parallel or in a mixed configuration.

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