Power supply adjusting circuit integrated in control panel
By integrating the control unit and chopper circuit into the control panel, the problem of limited installation space for third-party dimming equipment is solved, enabling simplified installation and efficient adjustment of multi-color temperature lamps, and reducing costs and complexity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HUIZHOU CDN INDAL DEV
- Filing Date
- 2026-02-05
- Publication Date
- 2026-04-28
AI Technical Summary
In traditional smart lighting control solutions, the installation space for third-party smart dimming devices is limited, especially in confined spaces.
The control panel integrates a control unit, chopper circuit, and button circuit. By controlling the branch circuits through multiple power switches, it enables the brightness and color temperature adjustment of multi-color temperature lamps, simplifying the system architecture and reducing installation space and complexity.
It enables multi-color temperature lamp adjustment without the need for additional third-party equipment, simplifies installation space, reduces costs, and supports continuous brightness adjustment and stepless color temperature switching.
Smart Images
Figure CN121940916A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of lighting equipment technology, and more particularly to a power regulation circuit integrated into a control panel. Background Technology
[0002] With the rapid development of smart home technology, smart lighting systems have been widely used in residential and commercial spaces as well as various customized scenarios (such as whole-house custom wardrobes, cabinets, and embedded light strips).
[0003] Currently, mainstream smart lighting control solutions typically adopt a separate architecture of "smart switch panel + third-party smart dimming device": that is, the smart panel sends control signals (such as DALI, 0-10V, PWM or wireless commands), and then the LED light source is dimmed or its color temperature is adjusted by a separately installed third-party smart dimming device.
[0004] However, this solution has significant limitations in practical applications. In space-constrained installation environments (such as ceiling mezzanines, narrow cabinets, etc.), it is often difficult to reserve enough space for installing additional dimming modules. Summary of the Invention
[0005] This application provides a power regulation circuit integrated into a control panel, which aims to solve the problem of limited installation space caused by the traditional use of third-party smart dimming devices.
[0006] In a first aspect, embodiments of this application provide a power regulation circuit integrated into a control panel for driving a multi-color temperature lamp. The multi-color temperature lamp includes multiple groups of LED beads, each group of LED beads corresponding to a color temperature. The control panel includes a control unit, a chopper circuit, and a button circuit. The control unit has an input terminal connected to the button circuit and multiple PWM signal output terminals. The chopper circuit includes multiple power switch control branches, each corresponding to a PWM signal output terminal and a group of LED beads. The input terminal of each power switch control branch is connected to the corresponding PWM signal output terminal, and the output terminal of each power switch control branch is connected to the corresponding group of LED beads. The control unit adjusts the duty cycle of each PWM signal according to the trigger command of the button circuit to adjust the brightness and color temperature of the multi-color temperature lamp.
[0007] In one embodiment, the multi-channel power switch control branch includes a cool-color push-pull branch and a warm-color push-pull branch, the multiple LED groups include a warm-color LED group and a cool-color LED group, and the multiple PWM signal output terminals include a first PWM signal output terminal and a second PWM signal output terminal. The cool-color push-pull branch is connected to the first PWM signal output terminal and the cool-color LED group, and the warm-color push-pull branch is connected to the second PWM signal output terminal and the warm-color LED group. The first PWM signal and the second PWM signal are complementary signals.
[0008] In one embodiment, the cool color push-pull branch includes a cool color dimming chip, a first electronic switch, a first resistor, a second resistor, a third resistor, a fourth resistor, and a first capacitor; The input terminal of the cool-tone dimming chip is connected to the PWM signal output terminal through the first resistor, and the input terminal of the cool-tone dimming chip is grounded through the second resistor. The control terminal of the first electronic switch is connected to the output terminal of the cool-tone color-changing chip through the third resistor, and grounded through the fourth resistor; The first end of the first electronic switch tube is connected to the cool-color LED bead group in the multi-color temperature lamp, and the second end of the first electronic switch tube is grounded. The first capacitor is connected to the positive power supply pin of the cool-tone color chip.
[0009] In one embodiment, the warm-color push-pull branch includes a warm-color light chip, a second electronic switch, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, and a second capacitor. The input terminal of the warm-tone light chip is connected to the PWM signal output terminal through the fifth resistor, and the input terminal of the warm-tone light chip is grounded through the sixth resistor. The control terminal of the second electronic switch is connected to the output terminal of the warm-tone light chip through the seventh resistor, and grounded through the eighth resistor; The first end of the second electronic switch is connected to the warm-color LED bead group in the multi-color temperature lamp, and the second end of the second electronic switch is grounded. The second capacitor is connected to the positive power supply pin of the warm-tone light chip.
[0010] In one embodiment, the control panel further includes an indicator light circuit, and the plurality of PWM signal output terminals further include a third PWM signal output terminal, the indicator light circuit being connected to the third PWM signal output terminal.
[0011] In one embodiment, the indicator circuit includes a light-emitting diode, a third electronic switch, a ninth resistor, a tenth resistor, and an eleventh resistor. The first terminal of the third electronic switch is connected to the cathode of the light-emitting diode through the ninth resistor. The anode of the light-emitting diode is used to connect to an external power supply terminal. The control terminal of the third electronic switch is connected to the third PWM signal output terminal through the tenth resistor and grounded through the eleventh resistor. The second terminal of the third electronic switch is grounded.
[0012] In one embodiment, the control panel further includes a constant voltage circuit connected to the chopper circuit.
[0013] In one embodiment, the control panel further includes a wireless module that is communicatively connected to the control unit.
[0014] In one embodiment, the control panel further includes a module power supply circuit, the input of which is connected to the constant voltage circuit, and the output of which is connected to the wireless module and the control unit.
[0015] In one embodiment, the control panel further includes a relay circuit connected to the output pin of the control panel.
[0016] This application provides a power regulation circuit integrated into a control panel for driving a multi-color temperature lamp. The multi-color temperature lamp includes multiple groups of LED beads, each group of LED beads corresponding to a color temperature. The control panel includes a control unit, a chopper circuit, and a button circuit. The control unit has an input terminal connected to the button circuit and multiple PWM signal output terminals. The chopper circuit includes multiple power switch control branches, each corresponding to a PWM signal output terminal and a group of LED beads. The input terminal of each power switch control branch is connected to the corresponding PWM signal output terminal, and the output terminal of each power switch control branch is connected to the corresponding group of LED beads. The control unit adjusts the duty cycle of each PWM signal according to the trigger command of the button circuit to adjust the brightness and color temperature of the multi-color temperature lamp.
[0017] This application embodiment integrates a control unit, a chopper circuit, and a button circuit within the control panel. The chopper circuit includes multiple power switch control branches, each connected to a corresponding LED group and a corresponding PWM signal output terminal. Based on this, the control unit can adjust the duty cycle of each PWM signal according to user button commands, drive LED groups of different color temperatures to work, and precisely control the luminous intensity of LED groups of different color temperatures. This achieves continuous and smooth brightness adjustment and stepless color temperature switching, eliminating the need for additional third-party intelligent dimming equipment, simplifying the system architecture, and reducing installation space, complexity, and cost. Attached Figure Description
[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.
[0021] Figure 1 A schematic diagram of an embodiment of a power regulation circuit integrated into a control panel provided in this application; Figure 2 A schematic diagram of an embodiment of the microcontroller provided in this application; Figure 3 A schematic diagram of an embodiment of the cool-color push-pull branch provided in this application; Figure 4 A schematic diagram of an embodiment of the warm-colored push-pull branch provided in this application; Figure 5 A schematic diagram of an embodiment of the indicator light circuit provided in this application; Figure 6 A schematic diagram of an embodiment of the button circuit provided in this application; Figure 7 A schematic diagram of an embodiment of the relay circuit provided in this application; Figure 8 This is a schematic diagram of the level signals provided in this application; Figure 9 A schematic diagram of an embodiment of the constant voltage circuit provided in this application; Figure 10 This is a schematic diagram of an embodiment of the wireless module provided in this application.
[0022] Explanation of icon numbers: Control Panel 10, Microcontroller 100, First PWM Signal PWM1, Second PWM Signal PWM2, Third PWM Signal PWM3, Positive Power Supply Pin VCC, Output Pin IO1, Chopper Circuit 200, Cool Color Push-Pull Branch 210, Cool Color Dimming Chip U2, First Electronic Switch Q3, First Resistor R18, Second Resistor R19, Third Resistor R20, Fourth Resistor R23, First Capacitor C5, Warm Color Push-Pull Branch 220, Warm Color Dimming Chip U3, Second Electronic Switch Q4, Fifth Resistor R21, Sixth Resistor R58, Seventh Resistor R22, Eighth Resistor R24, Second Capacitor C6, Button Circuit 300, Indicator Light Circuit 400, Light Emitting Diode LED1, Third Electronic Switch Q5, Ninth Resistor R41, Tenth Resistor R47, Eleventh Resistor R53, Constant Voltage Circuit 500, Wireless Module 600, Module Power Supply Circuit 700, Relay Circuit 800, Dimming Power Supply 900, Dual Color Temperature Light Source 20. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0024] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.
[0025] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.
[0026] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.
[0027] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.
[0028] As used in this specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."
[0029] To address the aforementioned issues, this application provides a power regulation circuit integrated into the control panel, eliminating the need for additional third-party intelligent dimming devices, thus simplifying the system architecture and reducing installation space, complexity, and cost.
[0030] See Figure 1 , Figure 1 This application provides a circuit diagram of a power regulation circuit integrated within a control panel 10. The power regulation circuit integrated within the control panel 10 provided in this application embodiment is used to drive a multi-color temperature lamp. The multi-color temperature lamp includes multiple groups of LED beads, each group of LED beads corresponding to a color temperature. The control panel 10 includes a control unit, a chopper circuit 200, and a button circuit 300.
[0031] The control unit has an input terminal connected to the button circuit 300 and multiple PWM signal output terminals. The chopper circuit 200 includes multiple power switch control branches, each corresponding to a PWM signal output terminal and a group of LED beads. The input terminal of each power switch control branch is connected to the corresponding PWM signal output terminal, and the output terminal of each power switch control branch is connected to the corresponding group of LED beads. The control unit adjusts the duty cycle of each PWM signal according to the trigger command of the button circuit 300 to adjust the brightness and color temperature of the multi-color temperature lamp.
[0032] This embodiment integrates a control unit, a chopper circuit 200, and a button circuit 300 within the control panel 10. The chopper circuit 200 includes multiple power switch control branches, each connected to a corresponding LED group and a corresponding PWM signal output terminal. Based on this, the control unit can adjust the duty cycle of each PWM signal according to user button commands, drive LED groups of different color temperatures to work, and precisely control the luminous intensity of LED groups of different color temperatures. This achieves continuous and smooth brightness adjustment and stepless color temperature switching, eliminating the need for additional third-party intelligent dimming equipment, simplifying the system architecture, and reducing installation space, complexity, and cost.
[0033] In one exemplary embodiment, the chopper circuit 200 includes multiple power switch control branches, such as a first power switch control branch, a second power switch control branch, and a third power switch control branch; the corresponding multi-color temperature lamp includes a first color temperature LED group, a second color temperature LED group, and a third color temperature LED group; the control unit has three PWM signal output terminals, namely a first PWM signal output terminal, a second PWM signal output terminal, and a third PWM signal output terminal. Wherein: The first power switch control branch is connected to the first PWM signal output terminal and the first color temperature LED group; The second power switch control branch is connected to the second PWM signal output terminal and the second color temperature LED group; The third power switch control branch is connected to the third PWM signal output terminal and the third color temperature LED group.
[0034] When a user wants to switch the lamp to the first color temperature, they can issue a command through the button on the touch panel. After receiving the command, the control unit sets the duty cycle of the first PWM signal to 100%, and sets the duty cycles of the second and third PWM signals to 0%, so that only the first color temperature LED group is lit, achieving pure first color temperature lighting.
[0035] Similarly, when the user wants to switch the lighting to the second color temperature, the control unit sets the duty cycle of the second PWM signal to 100%, and the other two to 0%. When the lamp switches to the third color temperature, the control unit sets the duty cycle of the third PWM signal to 100%, and the other two to 0%.
[0036] Furthermore, users can independently adjust the luminous intensity in any color temperature mode. For example, in the first color temperature mode: If you want the brightness to be 50%, adjust the duty cycle of the first PWM signal from 100% to 50%. If you want the brightness to be 30%, adjust the duty cycle of the first PWM signal from 100% to 30%. If the current brightness is 30% and you want to increase it to 80%, you can also use the button operation to make the control unit adjust the duty cycle of the first PWM signal from 30% to 80%.
[0037] Similarly, the brightness adjustment mechanism described above also applies to the second or third color temperature modes. By precisely controlling the duty cycle of each PWM signal, the control unit can independently adjust the luminous intensity of each group of LEDs, thereby achieving multi-color temperature switching while supporting stepless dimming and meeting users' needs for fine-grained control of light color and brightness.
[0038] In some embodiments, multi-color temperature luminaires may employ a dual-color temperature structure; see details below. Figure 1 The dual-color temperature light source 20 is shown.
[0039] like Figure 1 and Figure 2 As shown, the control unit can be a microcontroller 100 (U5), which is a 32-bit microcontroller based on the ARM Cortex-M3 core with a main frequency of up to 72MHz and a computing power of 1.25 DMIPS / MHz.
[0040] By using the high-performance microcontroller 100 as the core component of the circuit, the stability of the product during long-term operation can be ensured.
[0041] In one embodiment, such as Figure 3 and Figure 4 As shown, the multi-channel power switch control branch includes a cool-color push-pull branch 210 and a warm-color push-pull branch 220. The multiple LED groups include warm-color LED groups and cool-color LED groups. The multiple PWM signal output terminals include a first PWM signal output terminal and a second PWM signal output terminal. The cool-color push-pull branch 210 is connected to the first PWM signal output terminal and the cool-color LED group. The warm-color push-pull branch 220 is connected to the second PWM signal output terminal and the warm-color LED group. The first PWM signal and the second PWM signal are complementary signals.
[0042] During normal operation, the first PWM signal and the second PWM signal are complementary (inverted) high-frequency signals, typically with a frequency greater than 16kHz. Specifically, when the first PWM signal outputs a high level, the second PWM signal outputs a low level; conversely, when the first PWM signal outputs a low level, the second PWM signal outputs a high level, and the two always maintain opposite logic states.
[0043] In some preferred embodiments, a dead time, such as 500 nanoseconds to 1 microsecond, may be provided between the first PWM signal and the second PWM signal. This dead time ensures that the two MOSFET power switching devices will not be turned on simultaneously during signal switching, thereby effectively avoiding the risk of power supply short circuit or overcurrent and improving system reliability and safety.
[0044] In one embodiment, such as Figure 3 As shown, the cold color push-pull branch 210 includes a cold color dimming chip U2, a first electronic switch Q3, a first resistor R18, a second resistor R19, a third resistor R20, a fourth resistor R23, and a first capacitor C5. The cold color push-pull branch 210 amplifies the signal and drives the first electronic switch Q3 by alternating conduction.
[0045] Specifically, the input terminal of the cool-tone lighting chip U2 is connected to the PWM signal output terminal through the first resistor R18, and the input terminal of the cool-tone lighting chip U2 is grounded through the second resistor R19; The control terminal of the first electronic switch Q3 is connected to the output terminal of the cool-tone color chip U2 through the third resistor R20, and grounded through the fourth resistor R23; The first terminal of the first electronic switch Q3 is connected to the cool-color LED bead group in the multi-color temperature lamp, and the second terminal of the first electronic switch Q3 is grounded. The first capacitor C5 is connected to the positive power supply pin VCC of the cool-tone color chip U2.
[0046] Among them, the first electronic switch Q3 can be an N-channel MOSFET or a P-channel MOSFET.
[0047] For example, the first electronic switch Q3 is an N-channel MOSFET, the first terminal of the first electronic switch Q3 is the drain of the N-channel MOSFET, the second terminal of the first electronic switch Q3 is the source of the N-channel MOSFET, and the control terminal of the first electronic switch Q3 is the gate of the N-channel MOSFET.
[0048] The first resistor R18 is a pull-up resistor, which ensures that the first PWM signal PWM1 is pulled high when there is no signal, preventing floating and false triggering.
[0049] The second resistor R19 is a pull-down resistor, connected between the input terminal of the first PWM signal PWM1 and GND. Together with the first resistor R18, it forms a voltage divider network to stabilize the input signal and suppress noise interference.
[0050] The third resistor R20 is a gate current-limiting resistor, connected between the output terminal of U2 and the gate of the first electronic switch Q3, to limit the current flowing into the gate of the first electronic switch Q3 and prevent oscillation or damage caused by excessive drive.
[0051] The fourth resistor R23 is a gate pull-down resistor, connected between the gate of the first electronic switch Q3 and ground. It ensures that when U2 outputs a high impedance state or is turned off, the gate of the first electronic switch Q3 is pulled low, so that the first electronic switch Q3 is reliably turned off and avoids false triggering.
[0052] The first capacitor C5 can be a coupling capacitor used for AC signal transmission.
[0053] In one embodiment, such as Figure 4 As shown, the warm-color push-pull branch 220 includes a warm-color dimming chip U3, a second electronic switch Q4, a fifth resistor R21, a sixth resistor R58, a seventh resistor R22, an eighth resistor R24, and a second capacitor C6. The warm-color push-pull branch 220 amplifies the signal and drives the second electronic switch Q4 by alternating conduction.
[0054] Specifically, the input terminal of the warm-tone light chip U3 is connected to the PWM signal output terminal through the fifth resistor R21, and the input terminal of the warm-tone light chip U3 is grounded through the sixth resistor R58. The control terminal of the second electronic switch Q4 is connected to the output terminal of the warm-tone light chip U3 through the seventh resistor R22, and grounded through the eighth resistor R24; The first terminal of the second electronic switch Q4 is connected to the warm-color LED bead group in the multi-color temperature lamp, and the second terminal of the second electronic switch Q4 is grounded. The second capacitor C6 is connected to the positive power supply pin VCC of the warm-tone light chip U3.
[0055] The second electronic switch Q4 can be an N-channel MOSFET or a P-channel MOSFET.
[0056] For example, the second electronic switch Q4 is an N-channel MOSFET, the first terminal of the second electronic switch Q4 is the drain of the N-channel MOSFET, the second terminal of the second electronic switch Q4 is the source of the N-channel MOSFET, and the control terminal of the second electronic switch Q4 is the gate of the N-channel MOSFET.
[0057] The fifth resistor, R21, is a pull-up resistor to ensure that the second PWM signal, PWM2, is pulled high when there is no signal, preventing it from floating and causing false triggering.
[0058] The sixth resistor R58 is a pull-down resistor, connected between the input terminal of the second PWM signal PWM2 and GND. Together with the fifth resistor R21, it forms a voltage divider network to stabilize the input signal and suppress noise interference.
[0059] The seventh resistor R22 is a gate current-limiting resistor, connected between the output terminal of U3 and the gate of the second electronic switch Q4, to limit the current flowing into the gate of the second electronic switch Q4 and prevent oscillation or damage due to excessive drive.
[0060] The eighth resistor R24 is a gate pull-down resistor, connected between the gate of the second electronic switch Q4 and ground. It ensures that when U3 outputs a high impedance state or is turned off, the gate of the second electronic switch Q4 is pulled low, so that the first electronic switch Q3 is reliably turned off, avoiding false triggering.
[0061] The second capacitor C6 can be a coupling capacitor used for AC signal transmission.
[0062] In one embodiment, such as Figure 5 As shown, the control panel 10 also includes an indicator light circuit 400, and the multiple PWM signal output terminals also include a third PWM signal output terminal, with the indicator light circuit 400 connected to the third PWM signal output terminal.
[0063] In one embodiment, the indicator circuit 400 includes a light-emitting diode (LED) LED1, a third electronic switch Q5, a ninth resistor R41, a tenth resistor R47, and an eleventh resistor R53. The first terminal of the third electronic switch Q5 is connected to the cathode of the LED1 through the ninth resistor R41. The anode of the LED1 is used to connect to an external power supply terminal. The control terminal of the third electronic switch Q5 is connected to the third PWM signal output terminal through the tenth resistor R47 and grounded through the eleventh resistor R53. The second terminal of the third electronic switch Q5 is grounded.
[0064] The third electronic switch Q5 can be an N-type transistor or a P-type transistor.
[0065] For example, the third electronic switch Q5 is an N-type transistor, the first terminal of the third electronic switch Q5 is the collector of the N-type transistor, the second terminal of the third electronic switch Q5 is the emitter of the N-type transistor, and the control terminal of the third electronic switch Q5 is the base of the N-type transistor.
[0066] The ninth resistor, R41, is a current-limiting resistor connected in series between LED1 and the third electronic switch Q5. It limits the current flowing through LED1 to prevent LED1 from burning out due to excessive current caused by excessive voltage or excessive duty cycle of PWM signal.
[0067] The tenth resistor, R47, is a pull-up resistor connected between the input terminal of the third PWM signal PWM3 and the base of the N-type transistor. This ensures that when the third PWM signal PWM3 is invalid or floating, the base is pulled high to avoid false triggering.
[0068] The eleventh resistor, R53, is a pull-down resistor connected between the base of the third electronic switch Q5 and ground. It ensures that when the third PWM signal PWM3 is low, the base is reliably pulled low, so that the third electronic switch Q5 is completely turned off.
[0069] In some embodiments, the on / off process of LED1 can be achieved by changing the pulse width of the third PWM signal PWM3. The control unit is configured to flexibly set the output behavior of the third PWM signal PWM3 according to system status or user interaction requirements. Specifically, the third PWM signal PWM3 can change synchronously with the PWM signal of the main dimming channel, or it can operate independently to achieve diverse status indication functions.
[0070] For example, the third PWM signal PWM3 changes in tandem with the first PWM signal PWM1. When the user selects the cool color temperature lighting mode via a button, the control unit sets the duty cycle of the first PWM signal PWM1 to 100% to illuminate the cool color LED group, and simultaneously automatically sets the third PWM signal PWM3 to the same duty cycle as the first PWM signal PWM1. At this time, the brightness of the indicator light on the control panel 10 is synchronized with the cool color main light source, intuitively reflecting the current working status. If the user further adjusts the cool color brightness to 60%, the first PWM signal PWM1 and the third PWM signal PWM3 are simultaneously adjusted to 60%, and the indicator light dims accordingly, providing consistent visual feedback.
[0071] For example, the third PWM signal PWM3 changes in tandem with the second PWM signal PWM2. When the user selects the warm color temperature lighting mode via a button, the control unit sets the duty cycle of the second PWM signal PWM2 to 100% to illuminate the warm color LED group, and simultaneously automatically sets the third PWM signal PWM3 to the same duty cycle as the second PWM signal PWM2. At this time, the brightness of the indicator light on the control panel 10 is synchronized with the warm color main light source, intuitively reflecting the current working status. If the user further adjusts the warm color brightness to 60%, the second PWM signal PWM2 and the third PWM signal PWM3 are simultaneously adjusted to 60%, and the indicator light dims accordingly, providing consistent visual feedback.
[0072] In some implementations, when the system is in standby, distribution network, fault, or night mode, the control unit can decouple the third PWM signal PWM3 from the control logic of the first PWM signal PWM1 / second PWM signal PWM2, and independently output a PWM signal with a specific duty cycle or frequency. For example: During the power distribution process, the third PWM signal PWM3 drives the indicator light to flash at a frequency of 1Hz (duty cycle 50%). In night mode, the third PWM signal PWM3 maintains a low brightness of 10% and remains constantly lit, serving as a soft night light; When a fault alarm is triggered, the third PWM signal PWM3 will flash rapidly (e.g., 2Hz, 20% duty cycle).
[0073] Through the above design, the indicator light can not only serve as synchronous feedback of the main lighting status, but also provide multi-dimensional system status prompts, improving the intuitiveness of user operation and the level of product intelligence, without the need to add extra control pins or hardware costs.
[0074] In one embodiment, the button circuit 300 can be as follows: Figure 6 As shown.
[0075] Specifically, when button SW1 is triggered, IO2 changes from high level to low level. At this time, the 100U5 microcontroller changes the duty cycle of the first PWM signal PWM1, the second PWM signal PWM2, and the third PWM signal PWM3 through its internal algorithm, thereby realizing the process of turning the light on and off.
[0076] In one embodiment, the control panel 10 further includes a relay circuit 800, such as... Figure 7 As shown, the relay circuit 800 is connected to the output pin IO1 of the control panel 10.
[0077] Specifically, by changing the high or low level of IO1, the transistor Q1 is turned on or off, and the relay circuit 800 is used to switch the relay, thereby controlling the non-intelligent device.
[0078] Among them, non-smart devices can be exhaust fans, ordinary table lamps, electric towel racks, low-power electric heaters, etc., and this application does not make specific limitations.
[0079] The level signals of the first PWM signal PWM1, the second PWM signal PWM2, the third PWM signal PWM3, and IO1 and IO2 can be as follows: Figure 8 As shown.
[0080] In one embodiment, the control panel 10 further includes a constant voltage circuit 500, such as... Figure 9 As shown, the constant voltage circuit 500 is connected to the chopper circuit 200.
[0081] In some embodiments, such as Figure 1 As shown, the constant voltage circuit 500 and the chopper circuit 200 together form a dimming power supply 900.
[0082] In this way, the constant voltage circuit 500 provides a stable, low-ripple DC operating voltage for each power switch control branch in the chopper circuit 200, avoiding LED drive current drift caused by power fluctuations, thereby ensuring that different color temperature LED groups output consistent brightness and color temperature under the same PWM signal duty cycle, improving the light sensitivity of the dimming light and the user experience.
[0083] Furthermore, the constant voltage circuit 500 can effectively isolate voltage fluctuations, surges, and high-frequency noise from the mains input terminal, preventing grid interference from being transmitted to the sensitive PWM control and power switching modules, avoiding lamp flickering, control unit malfunctions, or communication abnormalities, and improving the overall reliability of the device.
[0084] In addition, the constant voltage circuit 500 is integrated into the control panel 10, eliminating the need for an external independent voltage regulator module or adapter. This saves installation space and reduces the overall system cost and wiring complexity, making it particularly suitable for customized lighting scenarios with limited space (such as recessed cabinet lights, ceiling light strips, etc.).
[0085] In one embodiment, the control panel 10 further includes a wireless module 600, such as Figure 10 As shown, the wireless module 600 is communicatively connected to the control unit.
[0086] The Wireless Module 600 allows the Control Panel 10 to operate with only a power cord, eliminating the need for additional signal cables and significantly reducing construction difficulty and renovation costs.
[0087] By integrating a wireless module 600 (such as Wi-Fi, Bluetooth, Zigbee, or Matter), the control panel 10 can be connected to a smart home system or mobile terminal (such as a mobile app or voice assistant). Users can remotely turn lights on and off, adjust brightness, or switch color temperature without physically touching the panel, improving ease of operation and intelligent experience.
[0088] In this way, the microcontroller 100 communicates via serial port protocol, is compatible with the wireless module 600 on multiple platforms, and the circuit adopts a modular design, which is convenient for replacement and expansion.
[0089] In one embodiment, the control panel 10 further includes a module power supply circuit 700, the input of which is connected to the constant voltage circuit 500, and the output of which is connected to the wireless module 600 and the control unit.
[0090] The module power supply circuit 700 takes the stable output of the constant voltage circuit 500 as input and provides a clean power supply that is compatible with the operating voltage of the control unit and the wireless module 600 through secondary voltage regulation (such as LDO or DC-DC). This effectively isolates the noise interference between the power dimming circuit and the sensitive digital circuit and avoids the voltage fluctuation caused by the switching action of the chopper circuit 200 from affecting the operation of the MCU or the wireless communication performance.
[0091] Based on the above embodiments, the power regulation circuit provided in this application is constructed using discrete components, which has the advantages of simple circuit architecture and low cost. Compared with traditional smart switch panels without dimming drivers, this power regulation circuit integrates the driving function inside the control panel, solving the problem of not being able to install the driver due to limited space during the decoration process. It also avoids the problems of hidden installation location and difficult maintenance of external drivers, reducing safety risks during construction and maintenance.
[0092] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this application.
[0093] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For example, the division of each unit is merely a logical functional division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.
[0094] The steps in the methods of this application embodiment can be adjusted, merged, or deleted according to actual needs. The units in the apparatus of this application embodiment can be merged, divided, or deleted according to actual needs. Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.
[0095] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, a terminal, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application.
[0096] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0097] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Since these modifications and variations fall within the scope of the claims and their equivalents, this application also intends to include these modifications and variations.
[0098] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A power regulation circuit integrated into a control panel, characterized in that, This is used to drive multi-color temperature lamps, which include multiple groups of LED beads, each group of LED beads corresponding to a color temperature. The control panel includes a control unit, a chopper circuit, and a button circuit. The control unit has an input terminal connected to the button circuit and multiple PWM signal output terminals. The chopper circuit includes multiple power switch control branches, each corresponding to a PWM signal output terminal and a group of LED beads. The input terminal of each power switch control branch is connected to the corresponding PWM signal output terminal, and the output terminal of each power switch control branch is connected to the corresponding group of LED beads. The control unit adjusts the duty cycle of each PWM signal according to the trigger command of the button circuit to adjust the brightness and color temperature of the multi-color temperature lamp.
2. The power regulation circuit according to claim 1, characterized in that, The multi-channel power switch control branch includes a cool-color push-pull branch and a warm-color push-pull branch. The multiple LED groups include warm-color LED groups and cool-color LED groups. The multiple PWM signal output terminals include a first PWM signal output terminal and a second PWM signal output terminal. The cool-color push-pull branch is connected to the first PWM signal output terminal and the cool-color LED group. The warm-color push-pull branch is connected to the second PWM signal output terminal and the warm-color LED group. The first PWM signal and the second PWM signal are complementary signals.
3. The power regulation circuit according to claim 2, characterized in that, The cool color push-pull branch includes a cool color dimming chip, a first electronic switch, a first resistor, a second resistor, a third resistor, a fourth resistor, and a first capacitor; The input terminal of the cool-tone dimming chip is connected to the PWM signal output terminal through the first resistor, and the input terminal of the cool-tone dimming chip is grounded through the second resistor. The control terminal of the first electronic switch is connected to the output terminal of the cool-tone color-changing chip through the third resistor, and grounded through the fourth resistor; The first end of the first electronic switch tube is connected to the cool-color LED bead group in the multi-color temperature lamp, and the second end of the first electronic switch tube is grounded. The first capacitor is connected to the positive power supply pin of the cool-tone color chip.
4. The power regulation circuit according to claim 2, characterized in that, The warm-color push-pull branch includes a warm-color LED chip, a second electronic switch, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, and a second capacitor. The input terminal of the warm-tone light chip is connected to the PWM signal output terminal through the fifth resistor, and the input terminal of the warm-tone light chip is grounded through the sixth resistor. The control terminal of the second electronic switch is connected to the output terminal of the warm-tone light chip through the seventh resistor, and grounded through the eighth resistor; The first end of the second electronic switch is connected to the warm-color LED bead group in the multi-color temperature lamp, and the second end of the second electronic switch is grounded. The second capacitor is connected to the positive power supply pin of the warm-tone light chip.
5. The power regulation circuit according to claim 1, characterized in that, The control panel also includes an indicator light circuit, and the multiple PWM signal output terminals also include a third PWM signal output terminal, with the indicator light circuit connected to the third PWM signal output terminal.
6. The power regulation circuit according to claim 5, characterized in that, The indicator circuit includes a light-emitting diode, a third electronic switch, a ninth resistor, a tenth resistor, and an eleventh resistor. The first terminal of the third electronic switch is connected to the cathode of the light-emitting diode through the ninth resistor. The anode of the light-emitting diode is used to connect to an external power supply terminal. The control terminal of the third electronic switch is connected to the third PWM signal output terminal through the tenth resistor and grounded through the eleventh resistor. The second terminal of the third electronic switch is grounded.
7. The power supply regulation circuit according to claim 1, characterized in that, The control panel also includes a constant voltage circuit, which is connected to the chopper circuit.
8. The power regulation circuit according to claim 7, characterized in that, The control panel also includes a wireless module, which is communicatively connected to the control unit.
9. The power supply regulation circuit according to claim 8, characterized in that, The control panel also includes a module power supply circuit, the input of which is connected to the constant voltage circuit, and the output of which is connected to the wireless module and the control unit.
10. The power supply regulation circuit according to claim 1, characterized in that, The control panel also includes a relay circuit, which is connected to the output pin of the control panel.