Control circuit and device of RGB lamp
By introducing a discharge module and a power-on module into the RGB light control circuit, the flickering problem caused by residual voltage in the RGB lights was solved, ensuring stable lighting of the RGB lights and the reliability of the device, improving the user experience and extending the product life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-04-03
AI Technical Summary
When RGB lights are powered on before they are fully discharged, residual voltage can cause flickering and equipment malfunctions, affecting user experience and shortening product lifespan.
The system incorporates a control module, a power-on module, and a discharge module. The discharge module releases the residual charge of the RGB LEDs before powering on and outputs a power-on signal after confirming that the charge has been completely released, ensuring that the RGB LEDs light up stably.
This effectively avoids the problem of light flickering caused by voltage superposition, improves the reliability of the equipment and user experience, and extends the product life.
Smart Images
Figure CN224083746U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of power electronic circuit technology, and in particular to control circuits and devices for RGB lights. Background Technology
[0002] In modern electronic products with red, green, and blue (RGB) lighting effects, especially those integrating a large number of RGB LEDs, such as high-end gaming keyboards, RGB mice, esports monitors, and various decorative lighting devices, smooth switching and stable display of lighting effects are crucial for enhancing the user experience. However, in practical applications, a common technical challenge is that when these devices are not fully discharged after the last use—that is, when the power is cut off or the device enters standby mode—capacitors and other energy storage components in the RGB lighting driver circuit retain some charge, forming what is known as "residual voltage."
[0003] The presence of residual voltage can cause a series of problems when the device is powered on again or restarted. The most obvious manifestation is that the RGB lighting may flicker unexpectedly. This is because the residual voltage, combined with the new supply voltage, causes the instantaneous operating voltage of the LED beads to deviate from their normal operating range, thus triggering unstable light output. In addition, such irregular voltage fluctuations may also interfere with the device's microcontroller (MCU) or other control logic units, leading to user interface malfunctions, such as abnormal screen display and button failure, seriously reducing product reliability and user satisfaction.
[0004] More seriously, frequent encounters with such problems over a long period of time will not only accelerate the aging of RGB LEDs and driver circuits, but also shorten the product's lifespan. Utility Model Content
[0005] The main purpose of this application is to provide a control circuit and device for an RGB lamp, which aims to solve the technical problem of residual voltage in the RGB lamp causing the lamp to flash when powered on.
[0006] To achieve the above objectives, this application proposes a control circuit for an RGB lamp, which includes a control module, a power-on module, and a discharge module; the control module is connected to the power-on module and the discharge module respectively; the power-on module and the discharge module are also connected to the RGB lamp respectively.
[0007] The control module is used to output a discharge signal to the discharge module; the discharge module is used to control the RGB lamp to release charge after receiving the discharge signal; the control module is also used to output a power-on signal to the power-on module after the RGB lamp releases charge; the power-on module is also used to supply power to the RGB lamp after receiving the power-on signal. By introducing the discharge module, this application can ensure that the RGB lamp effectively releases its internal residual charge before each power-on, thereby avoiding the problem of light flickering caused by voltage superposition.
[0008] In addition, this application also proposes an RGB light device, which uses the RGB light control circuit described above. Attached Figure Description
[0009] 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.
[0010] 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.
[0011] Figure 1 A structural block diagram provided for Embodiment 1 of the control circuit for the RGB lamp of this application;
[0012] Figure 2 A structural block diagram provided for Embodiment 2 of the control circuit for the RGB lamp of this application;
[0013] Figure 3 The circuit diagram is for the control circuit of the RGB lamp provided in Embodiment 2 of this application.
[0014] Explanation of icon numbers:
[0015] label illustrate label illustrate 10 Control module R1 to R7 Resistors 1 to 7 20 Power-on module C1 First capacitor 21 Identification Submodule Q1 First transistor 22 Electronic module Q2 Second transistor 30 Discharge module Q3 First MOSFET
[0016] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0017] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.
[0018] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.
[0019] In products with RGB lights, especially those with a large number of RGB lights, residual voltage can occur when the charge from the previous use is not completely discharged, causing the lights to flicker and the UI to malfunction upon power-on, thus affecting the user experience.
[0020] Based on this, the present application provides a control circuit for an RGB lamp, referring to... Figure 1 , Figure 1 This is a structural block diagram of the control circuit for the RGB lamp in this application, provided in Embodiment 1.
[0021] In this embodiment, the control circuit of the RGB lamp includes: a control module 10, a power-on module 20, and a discharge module 30; the control module 10 is connected to the power-on module 20 and the discharge module 30 respectively; the power-on module 20 and the discharge module 30 are also connected to the RGB lamp respectively.
[0022] It should be noted that the control module 10 is used to output a discharge signal to the discharge module 30.
[0023] As we can understand, the discharge signal refers to a command signal issued by the control module in the RGB lamp control circuit. This signal triggers the discharge module to start working and release the residual charge inside the RGB lamp. This signal is crucial to ensuring that the RGB lamp can light up stably when powered on and to avoid flickering.
[0024] Understandably, this design ensures that the control module 10 can trigger the discharge process before the device is ready to enter the power-on process. By precisely controlling the timing and duration of the discharge signal, the discharge module 30 can effectively release the residual charge accumulated inside the RGB lamp.
[0025] In addition, when outputting a discharge signal, the control module 10 will also make intelligent judgments based on preset logic algorithms and device status to ensure the accuracy and safety of the discharge process. For example, it may detect the current voltage status of the RGB lamp, determine whether discharge is needed, and the priority of discharge.
[0026] It should be noted that the discharge module 30 is used to control the RGB lamp to release charge after receiving the discharge signal.
[0027] Understandably, the specific discharge signal received by the discharge module 30 is typically a low-level or high-level pulse, depending on the circuit design and control logic. Upon receiving the discharge signal, the discharge module 30 responds quickly, initiating a series of circuit operations to safely and effectively discharge the residual charge inside the RGB lamp. This process involves using resistors, capacitors, or other electronic components to form a discharge path, ensuring that the charge is released smoothly and rapidly.
[0028] It should be noted that the control module 10 is also used to output a power-on signal to the power-on module 20 after the RGB lamp releases its charge.
[0029] Understandably, in the control circuit of the RGB lamp, the control module 10 is not only responsible for sending a discharge signal to start the discharge process, but also bears the important responsibility of outputting a power-on signal to the power-on module 20 after the RGB lamp has successfully released its charge. This function ensures that the RGB lamp smoothly enters the working state under safe conditions.
[0030] Understandably, the power-on signal is a command issued by the control module 10 to the power-on module 20 after confirming that the internal charge of the RGB lamp has been safely released. This signal marks the end of the discharge process and the beginning of the power-on phase. Upon receiving the power-on signal, the power-on module 20 will immediately start, providing a stable power supply to the RGB lamp to ensure that the light can be lit normally.
[0031] Understandably, before outputting the power-on signal, the control module 10 will first detect the discharge state of the RGB lamp through its built-in logic circuit or microprocessor. This typically involves monitoring parameters such as discharge current, voltage, or time to ensure that the discharge process has been completely completed. Once it is confirmed that there is no residual charge inside the RGB lamp or that the charge has dropped to a safe level, the control module 10 will trigger the output of the power-on signal.
[0032] In addition, the power-on signal needs to match the interface and logic of the power-on module 20, and similarly, the discharge signal needs to match the discharge module 30 to ensure smooth signal transmission and normal operation of the equipment.
[0033] It should be noted that the power-on module 20 is also used to supply power to the RGB lights after receiving the power-on signal.
[0034] Understandably, the power-on signal is typically a level change, such as from low to high, used to instruct the power-on module 20 to begin supplying power. Upon receiving the power-on signal, the power-on module 20 immediately activates its internal power management circuitry. This circuitry may include components such as rectifiers, filters, and voltage regulators to convert the input AC or unstable DC power into the stable DC power required by the RGB lights. By precisely controlling the output voltage and current, the power-on module 20 ensures that the RGB lights operate within their normal operating range, avoiding potential risks such as overvoltage and overcurrent.
[0035] Specifically, when the device is ready to be powered on, the control module 10 first sends a discharge signal to the discharge module 30. Upon receiving the signal, the discharge module 30 immediately starts working, completely releasing the residual charge inside the RGB lamp. Once the discharge process is complete, the control module 10 detects this state change and subsequently sends a power-on signal to the power-on module 20. Upon receiving the signal, the power-on module 20 immediately provides a stable power supply to the RGB lamp, ensuring that the RGB lamp can light up normally and display the expected lighting effect.
[0036] In addition, this embodiment provides a feasible implementation method for selecting the timing of signal transmission, namely, the control module 10 is used to output the power-on signal to the power-on module 20 after the discharge signal has been working for a first preset time.
[0037] Understandably, the first preset time determines when power-on begins. This time is typically determined based on factors such as the discharge characteristics of the RGB LEDs, the response time of circuit components, and safety margins. The first preset time needs to be set to ensure the discharge process is completely completed while avoiding excessively long waiting times that could negatively impact the user experience.
[0038] It should be noted that the control module 10 is used to stop outputting the discharge signal after the discharge signal has been working for a second preset time.
[0039] Understandably, the second preset time determines how long the discharge process should last. This time setting is based on factors such as the discharge characteristics of the RGB lamp, the amount of charge to be released, the response time of the circuit components, and safety margins. The length of the second preset time should ensure that the charge inside the RGB lamp can be fully released, while avoiding unnecessary damage or energy consumption to the device due to excessively long discharge times.
[0040] It's important to note that the second preset time is usually longer than the first preset time, meaning there's a period when the LED is still discharging upon power-up. Typically, the first preset time is set to 1 second, while the second preset time is 0.2 seconds longer, i.e., 1.2 seconds. This time setting in RGB LED control circuits ensures that the RGB LED has sufficient time to discharge before power-up. While 1 second might be enough in most cases, the extra 0.2 seconds provides an additional safety margin, ensuring that all residual charge is fully released.
[0041] In this embodiment, the timing of the discharge and power-on signals is precisely controlled by the control module, and the power-on module 20 accurately powers on the LEDs, improving energy efficiency and reducing energy consumption. The introduction of the discharge module ensures that the RGB LEDs effectively release any residual charge before each power-on, thus avoiding flickering caused by voltage superposition.
[0042] Based on the first embodiment of this application, in the second embodiment of this application, the content that is the same as or similar to that in Embodiment 1 above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 2 , Figure 2 This is a structural block diagram of the control circuit for the RGB lamp in Embodiment 2 of this application.
[0043] In this embodiment, the discharge module 30 includes: an identification submodule 21 and an electron supply module 22; the identification submodule 21 is connected to the control module 10 and the electron supply module 22 respectively; the electron supply module 22 is also connected to an RGB lamp.
[0044] It should be noted that the identification submodule 21 is used to identify the power-on signal transmitted by the control module 10, and when the power-on signal is within a first preset range, it outputs a power supply signal to the power supply module 22.
[0045] Understandably, the primary task of the identification submodule 21 is to identify and parse the power-on signals from the control module 10. These signals typically contain specific voltage or current characteristics to indicate that the RGB lights are about to enter the power-on phase.
[0046] Understandably, the identification submodule 21 has a built-in set of judgment logic to determine whether the received power-on signal is within a preset safety range (i.e., the first preset range). This range is usually determined comprehensively based on the characteristics of the RGB lamp, circuit design requirements, and safety standards, aiming to ensure the safety and reliability of the power-on process.
[0047] Understandably, once the identification submodule 21 confirms that the power-on signal meets the preset conditions, it will immediately generate a power supply signal and output the signal to the power supply module 22. This step signifies that the RGB lamp is about to enter the power supply stage, preparing for normal light emission.
[0048] It should be noted that the power supply module 22 is used to supply power to the RGB lamps after receiving the power supply signal.
[0049] Understandably, the power supply module 22 immediately initiates the power supply mechanism upon receiving the power supply signal from the identification submodule 21. This response process typically involves voltage and current adjustments to ensure the RGB LED receives power that meets its operating requirements. Once power supply is initiated, the power supply module 22 needs to ensure that the RGB LED receives a stable, fluctuation-free power supply throughout its operation. This requires the power supply module to possess excellent power management capabilities and high-precision current and voltage control.
[0050] Furthermore, to protect the RGB lights and circuitry from damage, the power supply module 22 can also incorporate overload and short-circuit protection devices. These protection devices will quickly cut off the power supply when an abnormal current or short circuit is detected, ensuring system safety.
[0051] Understandably, splitting the power-on module 20 into an identification submodule 21 and a power supply module 22 achieves functional modularity. This design ensures that each module has a clear responsibility and interface, facilitating subsequent maintenance and upgrades. Simultaneously, the modular design reduces coupling between modules and minimizes mutual interference. When a module needs modification or updating, only the changes within that module need to be considered, without needing to account for the impact on other modules, thereby improving system maintainability.
[0052] Based on the above, this application provides a specific implementation method, please refer to... Figure 3 , Figure 3 The circuit diagram is for the control circuit of the RGB lamp provided in Embodiment 2 of this application.
[0053] In this embodiment, the control module 10 is an MCU chip. MCU chips typically integrate multiple functions, including timers, ADCs (analog-to-digital converters), and PWM (pulse width modulation) outputs, which are crucial for controlling RGB lights. Through programming, the MCU can precisely control the brightness and color changes of the RGB lights, achieving rich visual effects.
[0054] In this embodiment, the discharge module 30 includes: a first resistor R1, a second resistor R2, and a first transistor Q1.
[0055] It should be noted that the first end of the first resistor R1 is connected to the control module 10, and the second end of the first resistor R1 is connected to the base of the first transistor Q1; the first end of the second resistor R2 is connected to the RGB lamp, and the second end of the second resistor R2 is connected to the collector of the first transistor Q1; the emitter of the first transistor Q1 is grounded.
[0056] Understandably, the first resistor R1 acts as a current-limiting resistor, used to limit the current flowing from the control module 10 into the discharge module, preventing excessive current from damaging circuit components. The control module 10 can control the conduction state of Q1 by adjusting the current magnitude.
[0057] It is understandable that the second resistor R2 serves as a discharge resistor, helping the RGB lamp release the accumulated charge. When the first transistor Q1 is turned on, the RGB lamp, the second resistor R2, and the first transistor Q1 together form a discharge path.
[0058] It should be noted that the discharge module 30 may further include: a third resistor R3; the third resistor R3 is connected in parallel with the second resistor R2.
[0059] It is understandable that the third resistor R3 is connected in parallel with the second resistor R2, forming part of the discharge circuit. This parallel design allows for more flexible adjustment of the total resistance value of the discharge circuit, thereby optimizing discharge performance. By selecting an appropriate value for the third resistor R3, the current in the discharge circuit can be adjusted to meet different discharge requirements. A smaller value for the third resistor R3 will increase the discharge current and accelerate the discharge speed; while a larger value for the third resistor R3 will decrease the discharge current and prolong the discharge time.
[0060] In this embodiment, the identification submodule 21 includes: a fourth resistor R4, a fifth resistor R4, and a second transistor Q2.
[0061] It should be noted that the first end of the fourth resistor R4 is connected to the control module 10, the second end of the fourth resistor R4 is connected to the first end of the fifth resistor R5 and the base of the second transistor Q2, and the second end of the fifth resistor R5 is grounded; the collector of the second transistor Q2 is connected to the power supply module 22, and the emitter of the second transistor Q2 is grounded.
[0062] Understandably, the fourth resistor R4 serves as an input current-limiting resistor, used to limit the current flowing from the control module 10 into the identification submodule, preventing excessive current from damaging circuit components. The fourth resistor R4 and the fifth resistor R5 together form a voltage divider circuit, which divides the signal voltage output from the control module 10 and sends it to the base of the second transistor Q2.
[0063] Understandably, the second transistor Q2 receives the signal voltage from the voltage divider circuit of R4 and R5. When the signal voltage reaches or exceeds the base-emitter voltage threshold of Q2, the second transistor Q2 will conduct. When the second transistor Q2 conducts, it allows current to flow from the collector to the emitter, thereby triggering the power supply module 22 to power the RGB lamp.
[0064] In this embodiment, the power supply module 22 includes: a working power supply, a sixth resistor R6, a seventh resistor R7, a first capacitor C1, and a first MOSFET Q3.
[0065] It should be noted that the source of the first MOSFET Q3 is connected to the operating power supply, the first terminal of the sixth resistor R6, and the first terminal of the first capacitor C1; the gate of the first MOSFET Q3 is connected to the second terminal of the sixth resistor R6, the second terminal of the first capacitor C1, and the first terminal of the seventh resistor R7; the drain of the first MOSFET Q3 is connected to the RGB LED; and the second terminal of the seventh resistor R7 is connected to the identification submodule 21.
[0066] Understandably, when the identification submodule 21 outputs a power supply signal, this signal is sent to the gate of the first MOSFET Q3 through the seventh resistor R7. If the signal voltage is high enough that the gate-source voltage of the first MOSFET Q3 exceeds its threshold voltage, the first MOSFET Q3 will turn on. The turned-on first MOSFET Q3 allows the current output from the operating power supply to flow from its source to its drain, and this current is then received by the RGB LED, thereby lighting up the RGB LED.
[0067] Understandably, if the identification submodule 21 does not output a power supply signal, or the signal voltage is too low to turn on the first MOSFET Q3, the first MOSFET Q3 will remain in the off state, the RGB lamp will not receive current, and therefore will not light up.
[0068] Furthermore, the RC delay circuit formed by the sixth resistor R6 and the first capacitor C1 can stabilize the gate voltage of the first MOSFET Q3, preventing malfunctions caused by voltage fluctuations. C1, as a filter capacitor, can also smooth voltage fluctuations in the power supply, ensuring stable operation of Q3.
[0069] It should be noted that the above examples are only for understanding this application and do not constitute a limitation on the control circuit of the RGB lamp in this application. Any simple modifications based on this technical concept are within the protection scope of this application.
[0070] This application also provides an RGB lighting device, which uses the RGB lighting control circuit described above.
[0071] The RGB light device provided in this application, employing the RGB light control circuit of the above embodiments, can solve the technical problem of flickering caused by residual voltage in the RGB light upon power-up. Compared with the prior art, the beneficial effects of the RGB light device provided in this application are the same as those of the RGB light control circuit provided in the above embodiments, and other technical features in the RGB light device are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.
[0072] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.
Claims
1. A control circuit of an RGB lamp, characterized in that, The control circuit of the RGB lamp comprises a control module, a power-on module and a discharge module; The control module is connected with the power-on module and the discharge module respectively; The power-on module and the discharge module are further connected with the RGB lamp respectively; The control module is configured to output a discharge signal to the discharge module; The discharge module is configured to control the RGB lamp to release charge after receiving the discharge signal; The control module is further configured to output a power-on signal to the power-on module after the RGB lamp releases charge; The power-on module is further configured to supply power to the RGB lamp after receiving the power-on signal.
2. The control circuit of an RGB lamp as defined in claim 1, characterized in that, The discharge module comprises a first resistor, a second resistor and a first triode; The first end of the first resistor is connected with the control module, and the second end of the first resistor is connected with the base of the first triode; The first end of the second resistor is connected with the RGB lamp, and the second end of the second resistor is connected with the collector of the first triode; The emitter of the first triode is grounded.
3. The control circuit for an RGB lamp as defined in claim 2, wherein, The discharge module further comprises a third resistor, which is connected with the second resistor in parallel.
4. The control circuit for an RGB lamp of claim 1, wherein, The discharge module comprises an identification submodule and a power supply submodule; The identification submodule is connected with the control module and the power supply submodule respectively; The power supply submodule is further connected with the RGB lamp; The identification submodule is configured to identify the power-on signal transmitted by the control module, and output a power supply signal to the power supply submodule when the power-on signal is within a first preset range; The power supply submodule is configured to supply power to the RGB lamp after receiving the power supply signal.
5. The control circuit for an RGB lamp as defined in claim 4, wherein, The identification submodule comprises a fourth resistor, a fifth resistor and a second triode; The first end of the fourth resistor is connected with the control module, the second end of the fourth resistor is connected with the first end of the fifth resistor and the base of the second triode, and the second end of the fifth resistor is grounded; the collector of the second triode is connected with the power supply submodule, and the emitter of the second triode is grounded.
6. The control circuit for an RGB lamp as defined in claim 5, wherein, The power supply submodule comprises a working power supply, a sixth resistor, a seventh resistor, a first capacitor and a first MOS tube; The source of the first MOS tube is connected with the working power supply, the first end of the sixth resistor and the first end of the first capacitor; The gate of the first MOS tube is connected with the second end of the sixth resistor, the second end of the first capacitor and the first end of the seventh resistor; The drain of the first MOS tube is connected with the RGB lamp; The second end of the seventh resistor is connected with the identification submodule.
7. The control circuit for an RGB lamp of claim 1, wherein, The control module comprises an MCU chip.
8. The control circuit for an RGB lamp of claim 1, wherein, The control module is configured to output the power-on signal to the power-on module after the discharge signal works for a first preset time.
9. The control circuit for an RGB lamp of claim 1, wherein, The control module is configured to stop outputting the discharge signal after the discharge signal works for a second preset time.
10. An RGB lamp arrangement, characterized by The RGB lamp device applies the control circuit of the RGB lamp according to any one of claims 1 to 9.