Lighting ac module
By designing a lighting AC module and using a simple mechanical switch to switch scenes, the problem of complex and costly existing lighting circuits has been solved, achieving low-cost and efficient dimming and color-changing functions to meet various lighting needs.
Patent Information
- Application Number
- CN202522099835.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-29
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-29
AI Technical Summary
Existing lighting products with night light functions have complex circuits, high costs, and require sophisticated intelligent control chips and communication modules, making them inconvenient for users to operate.
Design a lighting AC module, including an input protection circuit, a rectifier circuit, a silicon controlled rectifier (SCR) detection circuit, a frequency reduction circuit, and a main control circuit. It achieves color and dimming through a simple mechanical switch, omitting complex intelligent control chips and communication modules, and uses traditional mechanical switches for scene switching.
It achieves a simple circuit structure, low-cost lighting control, is compatible with SCR dimming, has excellent dimming effect, supports multiple color adjustment modes, and meets the lighting needs of different scenarios.
Smart Images
Figure CN224684400U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of lighting circuits, and specifically relates to a lighting AC module. Background Technology
[0002] In the US home lighting market, various lighting fixtures (such as ceiling lights and downlights) are required to include a night light mode in addition to SCR dimming functionality; similar applications exist in the European market. Products with night light modes are primarily used in specific ambient environments, such as for watching TV or keeping the light on while sleeping, and are typically switched via a wall switch. Current solutions for products with night light functionality generally follow these characteristics: they use MCU control, offering good consistency during switching, but the circuitry is relatively complex and costly. Utility Model Content
[0003] To address the aforementioned technical problems, this utility model provides a lighting AC module to solve the issues described in the background section.
[0004] This utility model provides the following technical solution: a lighting AC module, including an input protection circuit, a rectifier circuit, a silicon controlled rectifier (SCR) detection circuit, a frequency reduction circuit, a main control circuit, a first lighting unit, and a second lighting unit; The rectifier circuit is connected to the input protection circuit. The thyristor detection circuit is connected to the rectifier circuit, the frequency reduction lightning circuit, the first lighting unit, and the main control circuit. One end of the frequency reduction lightning circuit is connected to the rectifier circuit, and the other end of the frequency reduction lightning circuit is connected between the first lighting unit and the second lighting unit. The main control circuit is connected to the thyristor detection circuit and the second lighting unit. The first lighting unit and the second lighting unit are connected in series. The input protection circuit is used to protect the input and absorb surge voltage and current. The rectifier circuit is used to rectify the AC power output by the input protection circuit into pulsating DC power. The thyristor detection circuit is used to dim the first lighting unit and the second lighting unit. The flicker removal circuit is used to remove flicker from the first lighting unit and the second lighting unit. The main control circuit is used to control the operation of the first lighting unit and the second lighting unit.
[0005] Compared with existing technologies, the advantages of this application are as follows: The peripheral circuit of this application is extremely simple, the circuit structure is relatively simple, and there are few components. For example, some modules adopt simple designs such as impedance switching circuits and detection circuits, eliminating the need for complex intelligent control chips and communication modules, thus reducing costs. There is no need for MCU programming or MCU peripheral power supply circuits. Operation is simple; it can be switched to a night light scene simply by turning the wall switch ON / OFF. There is no need to modify the original wall switch; color and dimming operations can be performed directly using traditional mechanical switches. Users can adjust the color temperature through simple switching actions, such as switching on and off multiple times in a short period of time. It is compatible with SCR dimming, with excellent dimming effect and diverse functions: it can realize multiple color adjustment modes, such as dual color temperature, tri-color temperature, or RGB full-color adjustment, while having a wide dimming range to meet the lighting needs of different scenarios.
[0006] Preferably, the input protection circuit includes a first input terminal, a second input terminal, a varistor, and a fuse. The fuse is connected to the branch where the first input terminal is located, and the varistor is connected between the branch where the first input terminal is located and the branch where the second input terminal is located.
[0007] Preferably, the rectifier circuit includes a bridge rectifier and an isolation diode. The input protection circuit is connected to the first and third interfaces of the bridge rectifier, respectively. The second and fourth interfaces of the rectifier circuit are connected to the first branch and the second branch, respectively. The isolation diode is connected to the first branch.
[0008] Preferably, the thyristor detection circuit includes a U1 chip, a first resistor and a fourth resistor connected between the first branch and the second branch, a second resistor connected to pin 4 of the U1 chip, a third resistor connected to pin 3 of the U1 chip, a fifth resistor connected to pin 6 of the U1 chip, a first capacitor connected to pin 5 of the U1 chip, a sixth resistor connected to pin 7 of the U1 chip, and a driving MOS connected to pin 8 of the U1 chip. A second capacitor and a seventh resistor are also connected to the branch containing the driving MOS. The fifth resistor and the sixth resistor are connected in series with the seventh resistor. Pin 5 of the U1 chip is also connected to the first resistor and the fourth resistor. One end of the first resistor, the second resistor, the third resistor, and the second capacitor are all connected to the first branch, and the first capacitor, the fourth resistor, and the seventh resistor are all connected to the second branch.
[0009] Preferably, the frequency reduction circuit includes a U3 chip, pin 4 of the U3 chip is connected to the rectifier circuit, pin 5 of the U3 chip is connected to a third capacitor, pin 1 of the U3 chip is connected to an eighth resistor, and one end of the third capacitor, the eighth resistor, pin 8 of the U3 chip, and pin 9 of the U3 chip are all connected between the first lighting unit and the second lighting unit.
[0010] Preferably, the main control circuit includes a U2 chip, with pins 1 and 9 of the U2 chip connected to the second branch. Pins 2 and 3 of the U2 chip are connected to an eleventh resistor and a twelfth resistor, respectively. Pin 4 of the U2 chip is connected to the second lighting unit. Pin 5 of the U2 chip is connected to a tenth resistor and a ninth resistor. Pins 6 and 7 of the U2 chip are connected to a fourth capacitor and a fifth capacitor, respectively. Pin 8 of the U2 chip is connected to the thyristor detection circuit. One end of pin 6 of the U2 chip is also connected between the ninth resistor and the tenth resistor. One end of the ninth resistor, the eleventh resistor, the twelfth resistor, the fourth capacitor, and the fifth capacitor are all connected to the second branch. Attached Figure Description
[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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.
[0012] Figure 1 A structural block diagram of the lighting AC module provided in this embodiment of the utility model; Figure 2 Circuit diagram of the lighting AC module provided in this embodiment of the utility model; Figure 3 A circuit diagram of the thyristor detection circuit provided for an embodiment of this utility model; Figure 4 Circuit diagram of the frequency reduction lightning circuit provided in the embodiment of this utility model; Figure 5 A circuit diagram of the main control circuit provided in an embodiment of this utility model.
[0013] Explanation of reference numerals in the attached figures:
[0014] The present invention will be further described below with reference to the accompanying drawings and description. Detailed Implementation
[0015] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.
[0016] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0018] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.
[0019] In one embodiment of this utility model, such as Figure 1 , Figure 2 As shown, a lighting AC module includes an input protection circuit 1, a rectifier circuit 2, a silicon controlled rectifier (SCR) detection circuit 3, a frequency reduction circuit 4, a main control circuit 5, a first lighting unit 6, and a second lighting unit 7. The rectifier circuit 2 is connected to the input protection circuit 1. The thyristor detection circuit 3 is connected to the rectifier circuit 2, the frequency reduction lightning circuit 4, the first lighting unit 6, and the main control circuit 5. One end of the frequency reduction lightning circuit 4 is connected to the rectifier circuit 2, and the other end of the frequency reduction lightning circuit 4 is connected between the first lighting unit 6 and the second lighting unit 7. The main control circuit 5 is connected to the thyristor detection circuit 3 and the second lighting unit 7. The first lighting unit 6 and the second lighting unit 7 are connected in series. The input protection circuit 1 is used to protect the input and absorb surge voltage and current. The rectifier circuit 2 is used to rectify the AC power output by the input protection circuit 1 into pulsating DC power. The thyristor detection circuit 3 is used to dim the first lighting unit 6 and the second lighting unit 7. The flicker removal circuit 4 is used to remove flicker from the first lighting unit 6 and the second lighting unit 7. The main control circuit 5 is used to control the operation of the first lighting unit 6 and the second lighting unit 7.
[0020] The input protection circuit 1 includes a first input terminal 11, a second input terminal 12, a varistor 14, and a fuse 13. The fuse 13 is connected to the branch where the first input terminal 11 is located, and the varistor 14 is connected between the branch where the first input terminal 11 is located and the branch where the second input terminal 12 is located. Specifically, the first input terminal 11 and the second input terminal 12 are used to connect to the mains power of 120V / 220V, the fuse 13 is used to protect the safety of the entire circuit, and the varistor 14 is used to absorb surge voltage and current to protect the product safety.
[0021] The rectifier circuit 2 includes a bridge rectifier 21 and an isolation diode 22. The input protection circuit 1 is connected to the first and third interfaces of the bridge rectifier 21 respectively. The second and fourth interfaces of the rectifier circuit 2 are connected to the first branch and the second branch respectively. The isolation diode 22 is connected to the first branch. Specifically, the bridge rectifier 21 is used to rectify AC power into pulsating DC power. In the rectifier circuit 2, one end of the first resistor 32 is connected to the rectifier circuit 2, and the VCC voltage is connected to the end of the first resistor 32 connected to the rectifier circuit 2.
[0022] like Figure 3As shown, the thyristor detection circuit 3 includes a U1 chip 31, a first resistor 32 and a fourth resistor 38 connected between the first branch and the second branch, a second resistor 33 connected to pin 4 of the U1 chip 31, a third resistor 34 connected to pin 3 of the U1 chip 31, a fifth resistor 310 connected to pin 6 of the U1 chip 31, a first capacitor 39 connected to pin 5 of the U1 chip 31, a sixth resistor 311 connected to pin 7 of the U1 chip 31, and a capacitor 39 connected to pin 8 of the U1 chip 31. The driving MOS 36 is connected to a branch containing a second capacitor 35 and a seventh resistor 37. The fifth resistor 310 and the sixth resistor 311 are connected in series with the seventh resistor 37. The fifth pin of the U1 chip 31 is also connected to the first resistor 32 and the fourth resistor 38. One end of the first resistor 32, the second resistor 33, the third resistor 34, and the second capacitor 35 are all connected to the first branch. The first capacitor 39, the fourth resistor 38, and the seventh resistor 37 are all connected to the second branch. Specifically, the first resistor 32, the fourth resistor 38, and the first capacitor 39 are used to provide sustaining current compensation for the U1 chip 31. The second resistor 33 is used to provide drain voltage for the internal MOSFET of the U1 chip 31. The third resistor 34 is used to provide voltage for the U1 chip 31. The fifth resistor 310 is specifically a sustaining current setting resistor. The sixth resistor 311 and the seventh resistor 37 are both output current setting resistors. The driving MOS 36 is specifically an external main lamp driving MOS. The second capacitor 35 is specifically an energy storage and ripple reduction capacitor. In this application, the specific model of the U1 chip 31 is PM2029. At the same time, the first and ninth pins of the U1 chip 31 are grounded. The driving MOS 36 has three interfaces: the first interface is connected to the seventh resistor 37, the second interface is connected to the eighth pin of the U1 chip 31, and the third interface is connected to the second capacitor 35. Meanwhile, in the main control circuit 5, the eighth pin of the U2 chip 51 is connected between the second interface of the driving MOS 36 and the eighth pin of the U1 chip 31. One end of the seventh resistor 37 is grounded.
[0023] like Figure 4 As shown, the frequency reduction circuit 4 includes a U3 chip 41. Pin 4 of the U3 chip 41 is connected to the rectifier circuit 2. Pin 5 of the U3 chip 41 is connected to a third capacitor 43. Pin 1 of the U3 chip 41 is connected to an eighth resistor 42. One end of the third capacitor 43, the eighth resistor 42, pin 8 of the U3 chip 41, and pin 9 of the U3 chip 41 are all connected between the first lighting unit 6 and the second lighting unit 7. Specifically, the third capacitor 43 is the strobe IC start-up capacitor, and the eighth resistor 42 is the strobe current setting resistor. In this application, the model of the U3 chip 41 is PM2042.
[0024] like Figure 5 As shown, the main control circuit 5 includes a U2 chip 51. Pins 1 and 9 of the U2 chip 51 are connected to the second branch. Pins 2 and 3 of the U2 chip 51 are connected to an eleventh resistor 56 and a twelfth resistor 57, respectively. Pin 4 of the U2 chip 51 is connected to the second lighting unit 7. Pin 5 of the U2 chip 51 is connected to a tenth resistor 52 and a ninth resistor 53. Pins 6 and 7 of the U2 chip 51 are connected to a fourth capacitor 54 and a fifth capacitor 55, respectively. Pin 8 of the U2 chip 51 is connected to the thyristor detection circuit 3. One end of pin 6 of the U2 chip 51 is also connected between the ninth resistor 53 and the tenth resistor 52. One end of the ninth resistor 53, the eleventh resistor 56, the twelfth resistor 57, the fourth capacitor 54, and the fifth capacitor 55 are all connected to the second branch. Specifically, the tenth resistor 52, the ninth resistor 53 and the fourth capacitor 54 constitute the high-voltage start-up route of the U2 chip 51, the fifth capacitor 55 is specifically the power supply capacitor and energy storage capacitor of the U2 chip 51, the eleventh resistor 56 is specifically the reference voltage setting resistor of the U2 chip 51, the twelfth resistor 57 is specifically the output current setting resistor of the second lighting unit 7, and in this application, the model of the U2 chip 51 is PM2074X. Meanwhile, in this application, the first lighting unit 6 and the second lighting unit 7 are respectively LED light bulb main light and LED light bulb night light, and the number of them connected in series and parallel depends on the power of the circuit used.
[0025] During the work of this application: When the first input terminal 11 and the second input terminal 12 are connected to the mains power of 120V / 220V, the input voltage and current are absorbed by the fuse 12 and the varistor 14 and rectified into pulsating DC power by the bridge rectifier 21, which provides the start-up voltage and current to the U1 chip 31, and also provides the start-up voltage and current to the U2 chip 51 and the U3 chip 41. When the U1 chip 31, U2 chip 51 and U3 chip 41 are started, the first lighting unit 6 lights up and enters the normal lighting scene. It lights up for more than 60 seconds to remember the color temperature of the current scene. At the same time, the brightness can be adjusted by connecting a silicon controlled rectifier (SCR) dimmer. Scene change operation: When the wall switch is operated twice within 2 seconds, the scene change operation is initiated, changing from the first lighting unit 6 to the second lighting unit 7. After 60 seconds of illumination, the current night light mode is memorized, and the brightness can be adjusted by connecting a SCR dimmer. In summary, by connecting the first input terminal 11 and the second input terminal 12 to the wall switch and performing an on-off-on cycle within 2 seconds, the LD of the main control circuit 5 detects two high-level signal pulses indicating power failure. The main control circuit 5 then enters a scene transition operation, changing from the main light to the night light mode. After the night light mode is activated for 60 seconds, the main control circuit 5 memorizes the current night light mode and directly activates it the next time the light is turned on. To revert to the main light mode, simply turn the light off and on again. The CS pin is used to adjust the current for the night light mode, and different resistance values are used to adjust the brightness of the night light.
[0026] In this embodiment, the peripheral circuitry of this application is extremely simple, the circuit structure is relatively simple, and there are few components. For example, some modules adopt simple designs such as impedance switching circuits and detection circuits, eliminating the need for complex intelligent control chips and communication modules, thus reducing costs. There is no need for MCU programming or MCU peripheral power supply circuits. Operation is simple; it can be switched to a night light scene simply by turning the wall switch ON / OFF. There is no need to modify the original wall switch; color and dimming operations can be performed directly using traditional mechanical switches. Users can adjust the color temperature through simple switching actions, such as switching on and off multiple times in a short period of time. It is compatible with SCR dimming, has excellent dimming effect, and is multifunctional: it can realize multiple color adjustment modes, such as dual color temperature, tri-color temperature, or RGB full-color adjustment, and has a wide dimming range to meet the lighting needs of different scenarios.
[0027] 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. A lighting AC module, characterized in that, It includes an input protection circuit (1), a rectifier circuit (2), a thyristor detection circuit (3), a frequency reduction lightning circuit (4), a main control circuit (5), a first lighting unit (6), and a second lighting unit (7); The rectifier circuit (2) is connected to the input protection circuit (1). The thyristor detection circuit (3) is connected to the rectifier circuit (2), the frequency reduction lightning circuit (4), the first lighting unit (6), and the main control circuit (5) respectively. One end of the frequency reduction lightning circuit (4) is connected to the rectifier circuit (2), and the other end of the frequency reduction lightning circuit (4) is connected between the first lighting unit (6) and the second lighting unit (7). The main control circuit (5) is connected to the thyristor detection circuit (3) and the second lighting unit (7) respectively. The first lighting unit (6) and the second lighting unit (7) are connected in series. The input protection circuit (1) is used to protect the input and absorb surge voltage and current. The rectifier circuit (2) is used to rectify the AC power output by the input protection circuit (1) into pulsating DC power. The thyristor detection circuit (3) is used to dim the first lighting unit (6) and the second lighting unit (7). The anti-flicker circuit (4) is used to eliminate the flicker in the first lighting unit (6) and the second lighting unit (7). The main control circuit (5) is used to control the operation of the first lighting unit (6) and the second lighting unit (7).
2. The lighting AC module according to claim 1, characterized in that, The input protection circuit (1) includes a first input terminal (11), a second input terminal (12), a varistor (14), and a fuse (13). The fuse (13) is connected to the branch where the first input terminal (11) is located, and the varistor (14) is connected between the branch where the first input terminal (11) is located and the branch where the second input terminal (12) is located.
3. The lighting AC module according to claim 1, characterized in that, The rectifier circuit (2) includes a bridge rectifier (21) and an isolation diode (22). The input protection circuit (1) is connected to the first and third interfaces of the bridge rectifier (21) respectively. The second and fourth interfaces of the rectifier circuit (2) are connected to the first branch and the second branch respectively. The isolation diode (22) is connected to the first branch.
4. The lighting AC module according to claim 3, characterized in that, The thyristor detection circuit (3) includes a U1 chip (31), a first resistor (32) and a fourth resistor (38) connected between the first branch and the second branch, a second resistor (33) connected to pin 4 of the U1 chip (31), a third resistor (34) connected to pin 3 of the U1 chip (31), a fifth resistor (310) connected to pin 6 of the U1 chip (31), a first capacitor (39) connected to pin 5 of the U1 chip (31), a sixth resistor (311) connected to pin 7 of the U1 chip (31), and a driving MOS connected to pin 8 of the U1 chip (31). (36) The branch where the driving MOS (36) is located is also connected to a second capacitor (35) and a seventh resistor (37). The fifth resistor (310) and the sixth resistor (311) are connected in series with the seventh resistor (37). The fifth pin of the U1 chip (31) is also connected to the first resistor (32) and the fourth resistor (38). One end of the first resistor (32), the second resistor (33), the third resistor (34) and the second capacitor (35) are all connected to the first branch. The first capacitor (39), the fourth resistor (38) and the seventh resistor (37) are all connected to the second branch.
5. The lighting AC module according to claim 1, characterized in that, The frequency reduction lightning circuit (4) includes a U3 chip (41). The fourth pin of the U3 chip (41) is connected to the rectifier circuit (2). The fifth pin of the U3 chip (41) is connected to a third capacitor (43). The first pin of the U3 chip (41) is connected to an eighth resistor (42). One end of the third capacitor (43), the eighth resistor (42), the eighth pin of the U3 chip (41), and the ninth pin of the U3 chip (41) are all connected between the first lighting unit (6) and the second lighting unit (7).
6. The lighting AC module according to claim 3, characterized in that, The main control circuit (5) includes a U2 chip (51). Pins 1 and 9 of the U2 chip (51) are connected to the second branch. Pins 2 and 3 of the U2 chip (51) are connected to an eleventh resistor (56) and a twelfth resistor (57), respectively. Pin 4 of the U2 chip (51) is connected to the second lighting unit (7). Pin 5 of the U2 chip (51) is connected to a tenth resistor (52) and a ninth resistor (53). Pin 6 of the U2 chip (51) is connected to... Pin 7 and pin 8 are connected to the fourth capacitor (54) and the fifth capacitor (55) respectively. Pin 8 of the U2 chip (51) is connected to the thyristor detection circuit (3). One end of the sixth pin of the U2 chip (51) is also connected between the ninth resistor (53) and the tenth resistor (52). One end of the ninth resistor (53), the eleventh resistor (56), the twelfth resistor (57), the fourth capacitor (54), and the fifth capacitor (55) are all connected to the second branch.