A dimming and color adjusting circuit and a fan lamp

Abstract

The utility model provides a kind of light and color adjusting circuit and fan lamp, circuit includes the signal receiver of connection commercial power, signal receiver communication connection signal generator, signal receiver electrically connects single-chip microcontroller U10, first adjusting unit is arranged between signal receiver and single-chip microcontroller U10, first adjusting unit includes several first linear constant current IC, first adjusting unit electrically connects cool light lamp bead group and warm light lamp bead group, and single-chip microcontroller U10 respectively through MOS tube Q1 and MOS tube Q2 electrically connects cool light lamp bead group and warm light lamp bead group. Through the characteristic that first linear constant current IC has no switching frequency, it can be directly driven by commercial power, saving the setting cost of power supply and the space of fan lamp;Through the conduction time adjustment of MOS tube Q1 and MOS tube Q2, color temperature or brightness adjustment is completed, first linear constant current IC dynamically adjusts its impedance to realize constant current, color temperature or brightness is gradually adjusted, rather than power restart, improve the visual perception of user.

Description

Technical Field

[0001] This utility model relates to the field of lighting control, and in particular to a dimming and color-adjusting circuit and a fan light. Background Technology

[0002] Ceiling fan lights, also known as luxury decorative ceiling fans, are aesthetically pleasing and come with fan blades and lights in various colors and styles. They offer functions such as lighting, cooling, and decoration. In use, the light and fan are controlled separately, combining two different electrical appliances into one.

[0003] Compared to traditional ceiling fans, the fan speed of this light-filled fan is lower, resulting in a smaller airflow, gentler airflow, and no noise. Its main function is to regulate airflow, making it more suitable for human needs and comfort. Another feature is that the fan blades can rotate in both directions. The reverse function can be used in winter or in conjunction with air conditioning to promote air circulation. Experiments have shown that using a fan in an air-conditioned room saves 30-40% more energy than not using a fan, while also significantly improving room comfort and ventilation.

[0004] Existing fan lights typically have two dimming and color-changing methods. One is switching via a wall switch, but the light fixture needs to be powered off for more than 1 second when switching the color temperature, causing visual discomfort to the user, and most of them do not have dimming function. The other is switching via remote control, but a special dimming and color-changing power supply needs to be configured in the fan light, and the size of the fan light needs to be increased accordingly to add such a power supply, which is more expensive. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a dimming and color-changing circuit and a fan light, aiming to solve the technical problems of existing technologies where fan lights controlled by wall switches require the lamp to be powered off for more than 1 second when switching the color temperature, causing visual discomfort to users, and most of them do not have dimming functions; and where controlling fan lights by remote control requires a dedicated dimming and color-changing power supply inside the fan light, which is costly.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0007] A dimming and color-tuning circuit includes a signal receiver, a microcontroller U10, a group of cold light LED beads, and a group of warm light LED beads. The signal receiver is connected to mains power and is communicatively connected to a signal generator to convert received dimming and color-tuning signals into chopping signals. The signal receiver is electrically connected to the microcontroller U10. A first adjustment unit is provided between the signal receiver and the microcontroller U10. The first adjustment unit includes several first linear constant current ICs arranged in parallel. The first adjustment unit is electrically connected to the group of cold light LED beads and the group of warm light LED beads. The microcontroller U10 is electrically connected to the group of cold light LED beads through MOSFET Q1 and to the group of warm light LED beads through MOSFET Q2. The microcontroller U10 is used to output a first duty cycle signal and a second duty cycle signal according to the chopping signal to control the conduction time of MOSFET Q1 and MOSFET Q2, respectively.

[0008] Compared to related technologies, the advantages of this utility model are as follows: By setting the first adjustment unit between the signal receiver and the microcontroller U10, the cold light lamp group, and the warm light lamp group, and by utilizing the characteristic that the first linear constant current IC has no switching frequency, there is no need for bulky EMC safety components to handle safety issues, nor is there a need for a transformer for energy storage and power conversion. It can be directly driven by mains power, saving the power supply setup cost and the space of the fan light. By setting the MOSFETs Q1 and Q2, after receiving the first duty cycle signal and the second duty cycle signal generated based on the chopping signal, respectively, they complete the adjustment of their own conduction time ratio, thereby completing the adjustment of color temperature or brightness. During the adjustment process, the first linear constant current IC achieves constant current by dynamically adjusting its own impedance, ensuring that the current continues to exist during dimming and color adjustment. Therefore, the user perceives a gradual change in color temperature or brightness, rather than a power outage and restart, improving the user's visual experience.

[0009] Furthermore, a second adjustment unit is provided between the microcontroller U10 and the cold light lamp bead group, the second adjustment unit including several second linear constant current ICs arranged in parallel, and a third adjustment unit is provided between the microcontroller U10 and the warm light lamp bead group, the third adjustment unit including several third linear constant current ICs arranged in parallel.

[0010] Furthermore, a power supply voltage divider circuit is provided between the first adjustment unit and the microcontroller U10. The power supply voltage divider circuit includes resistors R5, R6 and R9 connected in series. An energy storage capacitor Ce3 and a Zener diode ZD1 are provided between the two opposite ends of the resistor R9.

[0011] Furthermore, a sampling voltage divider circuit is provided between the first adjustment unit and the microcontroller U10. The sampling voltage divider circuit includes resistors R7, R8 and R10 connected in series. A capacitor C4 and a Zener diode ZD2 are provided between the two opposite ends of the resistor R10.

[0012] Furthermore, a rectifier bridge BD1 is provided between the signal receiver and the first adjustment unit, a varistor VR1 is provided between the signal receiver and the rectifier bridge DB1, and a varistor VR2 is provided between the rectifier bridge BD1 and the first adjustment unit.

[0013] Furthermore, a fuse F1 is provided between the signal receiver and the varistor VR1.

[0014] Furthermore, a transient suppression transistor Z1 and a surge absorption capacitor CX1 are provided between the varistor VR2 and the first adjustment unit.

[0015] Furthermore, a driving resistor R1 is provided between the microcontroller U10 and the MOSFET Q1, a pull-down resistor R2 is provided between the driving resistor R1 and the MOSFET Q1, a driving resistor R3 is provided between the microcontroller U10 and the MOSFET Q2, and a pull-down resistor R4 is provided between the driving resistor R3 and the MOSFET Q2.

[0016] Furthermore, the cold light LED group includes several sub-cold light groups arranged in parallel, and each sub-cold light group includes several cold light LEDs arranged in series. The warm light LED group includes several sub-warm light groups arranged in parallel, and each sub-warm light group includes several warm light LEDs arranged in series.

[0017] This utility model also provides a fan light, including a dimming and color-adjusting circuit, wherein the dimming and color-adjusting circuit is any of the dimming and color-adjusting circuits described above. Attached Figure Description

[0018] Figure 1 This is a structural block diagram of the dimming and color-tuning circuit in an embodiment of this utility model;

[0019] Figure 2 This is a circuit diagram of the dimming and color-tuning circuit in an embodiment of this utility model;

[0020] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0021] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0022] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] Please see Figure 1 and Figure 2 The dimming and color-tuning circuit in this embodiment includes a signal receiver 10, a microcontroller U10, a cold light LED bead group 30, and a warm light LED bead group 40. The signal receiver 10 is connected to mains power and is communicatively connected to a signal generator to convert the received dimming and color-tuning signals into chopped signals. Understandably, the signal generator is a remote control or a terminal app. In this embodiment, the chopped signal is a nanosecond to millisecond-level chopped signal. Understandably, after the user performs a command operation (such as operating the brightness adjustment function key or the color temperature adjustment function key) through the remote control or terminal app, a dimming signal or color-tuning signal is generated and transmitted to the signal receiver 10. The signal receiver 10 encodes and translates this signal to form multiple nanosecond to millisecond-level chopped signals.

[0025] The signal receiver 10 is electrically connected to the microcontroller U10. A first adjustment unit 20 is provided between the signal receiver 10 and the microcontroller U10. The first adjustment unit 20 includes several first linear constant current ICs arranged in parallel. The first adjustment unit 20 is electrically connected to the cold light LED bead group 30 and the warm light LED bead group 40. Specifically, the cold light LED bead group 30 includes several sub-cold light groups arranged in parallel, and each sub-cold light group includes several cold light LED beads arranged in series. The warm light LED bead group 40 includes several sub-warm light groups arranged in parallel. The warm light group includes several warm light LED beads connected in series. In this embodiment, the cold light group 30 includes two cold light groups connected in parallel, and each cold light group includes 14 cold light LED beads connected in series. The warm light group 40 includes two warm light groups connected in parallel, and each warm light group includes 14 warm light LED beads connected in series. Through the structure of multiple parallel subgroups and series LED beads within the subgroups, the overall function is not affected in the event of a single LED bead failure, thus improving the service life of electronic devices and reducing the current pressure of a single circuit.

[0026] By setting the first adjustment unit 20 between the signal receiver 10 and the microcontroller U10, the cold light lamp bead group 30, and the warm light lamp bead group 40, and by utilizing the characteristic that the first linear constant current IC has no switching frequency, there is no need for bulky EMC safety components to handle safety issues, nor is there a need for transformers for energy storage and power conversion. It can be directly driven by mains power, saving the power supply setup cost and also saving space for the fan light.

[0027] A power supply voltage divider circuit 70 is provided between the first adjustment unit 20 and the microcontroller U10. The power supply voltage divider circuit 70 includes resistors R5, R6 and R9 connected in series. An energy storage capacitor Ce3 and a Zener diode ZD1 are provided between the two opposite ends of the resistor R9. By setting up the power supply voltage divider circuit 70, a stable supply voltage is provided to the microcontroller U10. By setting up the energy storage capacitor Ce3, a stable power supply is provided to the microcontroller U10. After setting up the Zener diode ZD1, damage to the microcontroller U10 can be avoided if the voltage exceeds the regulated value. Furthermore, a sampling voltage divider circuit 80 is provided between the first adjustment unit 20 and the microcontroller U10. The sampling voltage divider circuit 80 includes resistors R7, R8 and R10 connected in series. A capacitor C4 and a Zener diode ZD2 are provided between opposite ends of the resistor R10. By setting the sampling voltage divider circuit 80, a stable input signal is provided to the microcontroller U10. By setting the capacitor C4, high-frequency noise in the sampling circuit can be filtered out. The Zener diode ZD2 has the same function as the Zener diode ZD1, and will not be described in detail here.

[0028] A rectifier bridge BD1 is provided between the signal receiver 10 and the first adjustment unit 20. The rectifier bridge BD1 is used to rectify AC power into pulsed DC power. A varistor VR1 is provided between the signal receiver 10 and the rectifier bridge BD1, and a varistor VR2 is provided between the rectifier bridge BD1 and the first adjustment unit 20. The varistor voltage of VR1 is greater than that of VR2, thereby improving the surge protection capability of the circuit through stepped absorption. A fuse F1 is provided between the signal receiver 10 and the varistor VR1. When a short circuit or high current abnormality occurs in the downstream circuit, it can automatically melt to protect the downstream circuit and prevent the product from spontaneously combusting. A transient suppression transistor Z1 and a surge absorption capacitor CX1 are provided between the varistor VR2 and the first adjustment unit 20. When a surge voltage arrives, the transient suppression transistor Z1 can conduct the surge voltage to ground to protect the downstream circuit. When a surge voltage is generated in the circuit due to lightning strike, switch disconnection or motor reverse electromotive force, the surge absorption capacitor CX1 absorbs energy through fast charging and limits the voltage peak value within a safe range. The two work together to further improve the circuit's surge resistance.

[0029] Preferably, a second adjustment unit 50 is provided between the microcontroller U10 and the cold light LED bead group 30. The second adjustment unit 50 includes several second linear constant current ICs arranged in parallel. A third adjustment unit 60 is provided between the microcontroller U10 and the warm light LED bead group 40. The third adjustment unit 60 includes several third linear constant current ICs arranged in parallel. By setting the second adjustment unit 50 and the third adjustment unit 60, after the cold light LED bead group 30 is powered on, the first adjustment unit 20 and the second adjustment unit 50 work together to stabilize the current. After the warm light LED bead group 40 is powered on, the first adjustment unit 20 and the third adjustment unit 60 work together to stabilize the current. By sharing the current evenly through multiple parallel connections, overheating of a single chip is avoided, and reliability is improved.

[0030] The microcontroller U10 is electrically connected to the cold light lamp bead group 30 through MOSFET Q1. It can be understood that the second adjustment unit 50 is located between MOSFET Q1 and the cold light lamp bead group 30. The microcontroller U10 is electrically connected to the warm light lamp bead group 40 through MOSFET Q2. It can be understood that the third adjustment unit 60 is located between MOSFET Q2 and the warm light lamp bead group 40. The microcontroller U10 is used to output a first duty cycle signal and a second duty cycle signal according to the chopping signal, so as to control the conduction time of MOSFET Q1 and MOSFET Q2 respectively. By configuring the MOSFETs Q1 and Q2, after receiving the first duty cycle signal and the second duty cycle signal generated based on the chopping signal, respectively, they adjust their own conduction time ratios, thereby adjusting the color temperature or brightness. During the adjustment process, the first linear constant current IC dynamically adjusts its own impedance to achieve constant current, ensuring continuous current during dimming and color adjustment. Therefore, the user perceives a gradual change in color temperature or brightness, rather than a power-off restart, improving the user's visual experience. Furthermore, in this embodiment, because a nanosecond to millisecond-level chopping signal is used, the nanosecond-level chopping signal cuts off a very small portion of the 50 / 60Hz input flicker, eliminating the need for power-off and further avoiding flickering when switching brightness or color temperature, allowing for smooth switching of brightness and color temperature.

[0031] The MOSFETs Q1 and Q2 adjust their respective conduction times according to the first duty cycle signal and the second duty cycle signal. Understandably, the range of both the first and second duty cycle signals is 0% to 100%. After the duty cycle signal changes, the color temperature of the cold light LED group 30 and the warm light LED group 40 changes, thereby completing the overall brightness or color temperature adjustment. Preferably, a driving resistor R1 is provided between the microcontroller U10 and the MOSFET Q1, a pull-down resistor R2 is provided between the driving resistor R1 and the MOSFET Q1, a driving resistor R3 is provided between the microcontroller U10 and the MOSFET Q2, and a pull-down resistor R4 is provided between the driving resistor R3 and the MOSFET Q2. The driving resistors R1 and R3 provide conduction signals for the MOSFETs Q1 and Q2 respectively, and the pull-down resistors R2 and R4 ensure that the LEDs do not flicker when the driving voltage is too low.

[0032] This utility model also provides a fan light, including a dimming and color-adjusting circuit, which is the dimming and color-adjusting circuit described in the above embodiments.

[0033] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A dimming and color-tuning circuit, characterized in that, The system includes a signal receiver (10), a microcontroller U10, a cold light LED bead group (30), and a warm light LED bead group (40). The signal receiver (10) is connected to mains power and is communicatively connected to a signal generator to convert the received dimming and color-tuning signals into chopping signals. The signal receiver (10) is electrically connected to the microcontroller U10. A first adjustment unit (20) is provided between the signal receiver (10) and the microcontroller U10. The first adjustment unit (20) includes several parallel... The first linear constant current IC is connected in series. The first adjustment unit (20) is electrically connected to the cold light lamp bead group (30) and the warm light lamp bead group (40). The microcontroller U10 is electrically connected to the cold light lamp bead group (30) through MOS transistor Q1 and the warm light lamp bead group (40) through MOS transistor Q2. The microcontroller U10 is used to output a first duty cycle signal and a second duty cycle signal according to the chopping signal to control the conduction time of the MOS transistor Q1 and the MOS transistor Q2 respectively.

2. The dimming and color-tuning circuit according to claim 1, characterized in that, A second adjustment unit (50) is provided between the microcontroller U10 and the cold light lamp bead group (30). The second adjustment unit (50) includes several second linear constant current ICs arranged in parallel. A third adjustment unit (60) is provided between the microcontroller U10 and the warm light lamp bead group (40). The third adjustment unit (60) includes several third linear constant current ICs arranged in parallel.

3. The dimming and color-tuning circuit according to claim 1, characterized in that, A power supply voltage divider circuit (70) is provided between the first adjustment unit (20) and the single-chip microcomputer U10. The power supply voltage divider circuit (70) includes resistors R5, R6 and R9 connected in series. An energy storage capacitor Ce3 and a Zener diode ZD1 are provided between the two opposite ends of the resistor R9.

4. The dimming and color-tuning circuit according to claim 1, characterized in that, A sampling voltage divider circuit (80) is provided between the first adjustment unit (20) and the single-chip microcomputer U10. The sampling voltage divider circuit (80) includes resistors R7, R8 and R10 connected in series. A capacitor C4 and a Zener diode ZD2 are provided between the two opposite ends of the resistor R10.

5. The dimming and color-tuning circuit according to claim 1, characterized in that, A rectifier bridge BD1 is provided between the signal receiver (10) and the first adjustment unit (20), a varistor VR1 is provided between the signal receiver (10) and the rectifier bridge DB1, and a varistor VR2 is provided between the rectifier bridge BD1 and the first adjustment unit (20).

6. The dimming and color-tuning circuit according to claim 5, characterized in that, A fuse F1 is provided between the signal receiver (10) and the varistor VR1.

7. The dimming and color-tuning circuit according to claim 5, characterized in that, A transient suppression transistor Z1 and a surge absorption capacitor CX1 are provided between the varistor VR2 and the first adjustment unit (20).

8. The dimming and color-tuning circuit according to claim 1, characterized in that, A driving resistor R1 is provided between the microcontroller U10 and the MOS transistor Q1, a pull-down resistor R2 is provided between the driving resistor R1 and the MOS transistor Q1, a driving resistor R3 is provided between the microcontroller U10 and the MOS transistor Q2, and a pull-down resistor R4 is provided between the driving resistor R3 and the MOS transistor Q2.

9. The dimming and color-tuning circuit according to claim 1, characterized in that, The cold light LED bead group (30) includes several sub-cold light groups arranged in parallel, and each sub-cold light group includes several cold light LED beads arranged in series. The warm light LED bead group (40) includes several sub-warm light groups arranged in parallel, and each sub-warm light group includes several warm light LED beads arranged in series.

10. A fan light, characterized in that, Includes the dimming and color-tuning circuit as described in any one of claims 1-9.

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