Audio lamp effect control circuit and audio playing equipment

Abstract

The utility model relates to the technical field of audio control, in particular to an audio lamp effect control circuit and audio playing equipment. The audio lamp effect control circuit is directly connected with an external audio playing device through the audio interface unit, high-quality transmission of digital audio signals is achieved, accuracy and high quality of the audio signals are guaranteed, and noise is effectively removed. The lamp effect control unit generates lamp effect control signals for the left sound channel and the right sound channel respectively according to the frequency and amplitude information of the audio signals, and the light effect can jump along with the sound of different sound channels through a separate control mode, so that on one hand, the accuracy of lamp effect control is improved, and the user experience is improved. On the other hand, the light effect is controlled according to the sound of different sound channels, and the user experience is improved.

Description

Technical Field

[0001] This application relates to the field of audio control technology, specifically to an audio lighting effect control circuit and an audio playback device. Background Technology

[0002] As people's living standards improve, music is becoming increasingly important in their lives. To better enjoy the pleasures of music, people often use various sound systems to play music and achieve the best sound playback effect. When playing music, people's emotions rise and fall with the music's ups and downs. To better create an atmosphere conducive to enjoying music, current technology often combines music with lighting, allowing the lighting to change according to the intensity of the music.

[0003] Lighting effects can create different atmospheres based on the rhythm, style, and emotional changes of music. For example, at a party, lights will flash in rhythm with the music to enhance the lively atmosphere; in a home environment, soft lighting can be paired with soothing music to create a warm and comfortable ambiance.

[0004] The inventors of this application discovered in their research that the existing methods of coordinating music and lighting effects are often rather crude and cannot achieve precise coordination between music and lighting. As people's requirements for musical atmosphere increase, the existing lighting adjustment methods are gradually failing to meet people's needs. Utility Model Content

[0005] In view of the above problems, this application provides an audio lighting effect control circuit and an audio playback device to solve the above-mentioned technical problems existing in the prior art.

[0006] One aspect of this application provides an audio lighting effect control circuit, the circuit comprising: an audio interface unit, an audio signal processing unit, a lighting effect control unit, a left channel lighting effect unit, a right channel lighting effect unit, an audio amplification unit, a left channel speaker, and a right channel speaker;

[0007] The audio interface unit is used to connect to an external audio playback device and receive audio signals sent by the external audio playback device;

[0008] The audio signal processing unit is connected to the audio interface unit and receives the audio signal, and sends the frequency value and amplitude value of the audio signal to the lighting effect control unit;

[0009] The lighting effect control unit receives the frequency and amplitude values ​​of the audio signal, sends a left channel lighting effect control signal to the left channel lighting effect unit so that the left channel lighting effect unit controls the lighting effect; and sends a right channel lighting effect control signal to the right channel lighting effect unit so that the right channel lighting effect unit controls the lighting effect.

[0010] The audio amplification unit is electrically connected to the audio signal processing unit and is used to acquire the left channel audio signal and the right channel audio signal output by the audio signal processing unit; it is also used to amplify the left channel audio signal and send it to the left channel speaker, and amplify the right channel audio signal and send it to the right channel speaker.

[0011] In some embodiments, the circuit further includes an audio acquisition unit;

[0012] The audio acquisition unit is electrically connected to the audio signal processing unit and is used to acquire sound signals. The audio signal processing unit converts the acquired sound signals and sends them to an external audio playback device through the audio interface unit.

[0013] In some embodiments, the audio acquisition unit includes a microphone, a first voltage divider resistor, a second voltage divider resistor, and a first filter capacitor;

[0014] One end of the first voltage divider resistor is connected to the power supply, and the other end of the first voltage divider resistor is electrically connected to the positive terminal of the microphone and the second voltage divider resistor, respectively.

[0015] The other end of the second voltage divider resistor is electrically connected to the negative terminal of the microphone and then grounded;

[0016] The positive terminal of the microphone is electrically connected to the audio signal processing unit through the first filter capacitor.

[0017] In some embodiments, the audio acquisition unit further includes a diode, a ferrite bead, and a second filter capacitor;

[0018] The positive terminal of the diode is connected to the power supply, and the negative terminal of the diode is connected to one end of the magnetic bead;

[0019] The other end of the magnetic bead is electrically connected to one end of the first voltage divider resistor and one end of the second filter capacitor, respectively.

[0020] The other end of the second filter capacitor is grounded.

[0021] In some embodiments, the audio interface unit is a USB interface or a Type-C interface.

[0022] In some embodiments, the left channel lighting unit or the right channel lighting unit includes: a current-limiting resistor, a lighting control chip, and an LED light;

[0023] One end of the current-limiting resistor is electrically connected to the lighting effect control unit, and the other end is electrically connected to the input terminal of the lighting effect control chip;

[0024] The lighting effect control chip is used to receive the left channel lighting effect control signal or the right channel lighting effect control signal sent by the lighting effect control unit.

[0025] The positive terminal of the LED is connected to the power supply, and the negative terminal is electrically connected to the output terminal of the lighting effect control chip.

[0026] In some embodiments, the left lighting unit or the right channel lighting unit further includes a boost circuit;

[0027] The boost circuit includes a boost module, a third voltage divider resistor, and a fourth voltage divider resistor. The power output terminal of the boost module is connected to the positive terminal of the LED. The sampling feedback terminal of the boost module is connected to one end of the third voltage divider resistor and one end of the fourth voltage divider resistor. The other end of the fourth voltage divider resistor is connected to the positive terminal of the LED. The other end of the third voltage divider resistor is grounded.

[0028] In some embodiments, the left channel lighting unit or the right channel lighting unit respectively includes multiple lighting control chips and multiple LEDs;

[0029] Each of the aforementioned lighting effect control chips is connected to each of the aforementioned LED lights respectively;

[0030] Each of the aforementioned lighting effect control chips is cascaded with each other through its input and output terminals.

[0031] In some embodiments, the audio amplification unit includes: a first adjustable resistor, a second adjustable resistor, and a dual-channel audio amplifier;

[0032] One end of the first adjustable resistor is electrically connected to the audio signal processing unit for receiving the left channel audio signal; the adjustable end of the first adjustable resistor is electrically connected to the first audio input terminal of the dual-channel audio amplifier; the other end of the first adjustable resistor is grounded.

[0033] One end of the second adjustable resistor is electrically connected to the audio signal processing unit to receive the right channel audio signal; the adjustable end of the second adjustable resistor is electrically connected to the second audio input terminal of the dual-channel audio amplifier; the other end of the second adjustable resistor is grounded.

[0034] The first audio output terminal of the dual-channel audio amplifier is electrically connected to the left channel speaker.

[0035] The second audio output terminal of the dual-channel audio amplifier is electrically connected to the right channel speaker.

[0036] In another aspect of this application, an audio playback device is also proposed, the device including the audio lighting effect control circuit described in the above embodiments, the audio lighting effect control circuit being electrically connected to an external audio playback device and controlling the lighting effect according to the audio signal sent by the external audio playback device.

[0037] This application embodiment, on the one hand, establishes an audio interface unit that directly connects to an external audio playback device, enabling high-quality transmission of digital audio signals. An audio signal processing unit directly processes the acquired audio signal played from the external audio playback device, ensuring the accuracy and high quality of the audio signal and effectively removing noise. On the other hand, after acquiring the frequency and amplitude information of the audio signal, the audio signal processing unit sends this information to the lighting effect control unit. The lighting effect control unit generates lighting effect control signals for the left and right channels respectively based on the frequency and amplitude information. The left channel lighting effect control signal controls the lighting effect of the left channel lighting unit, and the right channel lighting effect control signal controls the lighting effect of the right channel lighting unit. This separate control method allows the lighting effects to change according to the sound of each channel. This approach improves the accuracy of lighting effect control and enables separate control of lighting effects based on the sound of different channels, enhancing the user experience.

[0038] The above description is merely an overview of the technical solutions of the embodiments of this application. In order to better understand the technical means of the embodiments of this application and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of this application more obvious and understandable, specific implementation methods of this application are described below. Attached Figure Description

[0039] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0040] Figure 1 A schematic diagram of the audio lighting effect control circuit provided in an embodiment of this application is shown;

[0041] Figure 2 A circuit diagram of the audio interface unit provided in an embodiment of this application is shown;

[0042] Figure 3 The circuit diagrams of the audio acquisition unit and audio signal processing unit provided in the embodiments of this application are shown;

[0043] Figure 4 A circuit diagram of the left channel lighting unit provided in an embodiment of this application is shown;

[0044] Figure 5 A circuit diagram of the audio amplification unit provided in an embodiment of this application is shown.

[0045] Figure label:

[0046] 101. Audio interface unit; 102. Audio signal processing unit; 103. Lighting effect control unit; 104. Left channel lighting effect unit; 105. Right channel lighting effect unit; 106. Audio amplification unit; 107. Left channel speaker; 108. Right channel speaker; 109. Audio acquisition unit;

[0047] U21, Interface chip; U17, Audio signal processing chip; U22, Microphone; R23, First voltage divider resistor; R24, Second voltage divider resistor; C15, First filter capacitor; D2, Diode; L1, Ferrite bead; C16, Second filter capacitor; C18, Pre-amplifier filter capacitor; R26, Current limiting resistor; L2, Power inductor; U3, Boost module; D5, Freewheeling diode; R27, Third voltage divider resistor; R28, Fourth voltage divider resistor; C19, First output filter capacitor; C20, Second output filter capacitor; R18, Current limiting resistor; U1, Lighting control chip; U23, First adjustable resistor; U24, Second adjustable resistor; U18, Dual-channel audio amplifier. Detailed Implementation

[0048] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0049] 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 application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0050] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0051] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0052] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after it have an "or" relationship.

[0053] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0054] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0055] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0056] Lighting effects add a visual element to sound systems, making music not only an auditory enjoyment but also enhancing the experience through visual effects. For example, LED speaker lights can display various effects such as breathing lights, flowing lights, and flashing lights, immersing the audience in a dual enjoyment of music and light. Many speakers with lighting effects can automatically adjust the flashing frequency and color of the lights according to the rhythm and pitch of the music. This synchronization function allows the lights and music to work perfectly together, further enhancing the impact of the music.

[0057] The inventors of this application discovered in their research that existing methods of music and lighting effect interaction typically use microphones to capture sound from speakers to control the lighting. Because this method picks up sound from the environment, it results in significant interference noise, making accurate control of the lighting effects impossible. Furthermore, as people's demands for speakers increase, they also desire the ability to control the lighting effects corresponding to different audio channels separately. However, the method of picking up sound from the environment cannot effectively distinguish the volume and frequency of the left and right channels, making it impossible to control the lighting effects of the left and right channels separately, significantly impacting the user experience.

[0058] In view of this, this application proposes an audio lighting effect control circuit and an audio playback device. On one hand, by setting an audio interface unit, it directly connects to an external audio playback device to achieve high-quality transmission of digital audio signals. An audio signal processing unit directly processes the acquired audio signal played by the external audio playback device, ensuring the accuracy and high quality of the audio signal and effectively removing noise. On the other hand, after acquiring the frequency and amplitude information of the audio signal, the audio signal processing unit sends this information to the lighting effect control unit. The lighting effect control unit generates lighting effect control signals for the left and right channels respectively based on the frequency and amplitude information of the audio signal. The left channel lighting effect control signal controls the lighting effect of the left channel lighting unit, and the right channel lighting effect control signal controls the lighting effect of the right channel lighting unit. This separate control method allows the lighting effect to change according to the sound of different channels. This approach improves the accuracy of lighting effect control and enables separate control of lighting effects based on the sound of different channels, enhancing the user experience.

[0059] like Figure 1 The diagram shown is a structural schematic of the audio lighting effect control circuit provided in this application embodiment. The audio lighting effect control circuit 10 includes an audio interface unit 101, an audio signal processing unit 102, a lighting effect control unit 103, a left channel lighting effect unit 104, a right channel lighting effect unit 105, an audio amplification unit 106, a left channel speaker 107, and a right channel speaker 108.

[0060] The audio interface unit 101 is used to connect to an external audio playback device and receive audio signals sent by the external audio playback device; the audio signal processing unit 102 is connected to the audio interface unit 101 and receives the audio signals, sending the frequency and amplitude values ​​of the audio signals to the lighting effect control unit 103; the lighting effect control unit 103 receives the frequency and amplitude values ​​of the audio signals, sends a left channel lighting effect control signal to the left channel lighting effect unit 104 so that the left channel lighting effect unit 104 controls the lighting effect; and sends a right channel lighting effect control signal to the right channel lighting effect unit 105 so that the right channel lighting effect unit 105 controls the lighting effect; the audio amplification unit 106 is electrically connected to the audio signal processing unit 102 and is used to acquire the left channel audio signal and the right channel audio signal output by the audio signal processing unit 102; it is also used to amplify the left channel audio signal and send it to the left channel speaker 107, and amplify the right channel audio signal and send it to the right channel speaker 108.

[0061] The audio interface unit 101 can be a USB interface or a Type-C interface. With the rapid development of computer technology and digital audio technology, USB or Type-C interfaces have become the standard interfaces for connecting digital devices. Audio devices with USB or Type-C interfaces can be directly connected to a computer via the USB or Type-C interface, realizing the transmission and processing of digital audio signals. USB or Type-C audio technology supports high-resolution audio data transmission, ensuring the quality of audio signals. Digital audio signals transmitted via USB or Type-C interfaces can be processed directly on a computer or a dedicated DSP chip, reducing signal distortion and noise. At the same time, audio devices with USB or Type-C interfaces typically integrate audio decoding, signal processing, and power amplification functions, simplifying system design. USB or Type-C interfaces are plug-and-play, convenient for users to connect and use, without complex settings. In contrast, traditional power amplifiers rely on small analog signals as input. When the signal line is long, the analog signal is susceptible to electromagnetic interference, leading to signal distortion and noise problems. Power amplifier circuits that use USB or Type-C cables for audio signal transmission are widely used in the field of digital communication because USB or Type-C signals are differential signals, have strong anti-interference capabilities, and have simple circuit structures and strong expandability. Figure 2 The circuit diagram of the audio interface unit 101 is shown. Figure 2Taking the Type-C interface circuit as an example, the interface chip U21 provides an interface for external audio playback devices, such as mobile phones, computers, or other playback devices. The CC1 and CC2 interfaces of the interface chip U21 are connected to 5.1k pull-down resistors, allowing for a default configuration of outputting 5V DC voltage when powered by the PD protocol. DP and DN are differential signal inputs, which can be connected to the USBDP and USBDM interfaces of the audio signal processing unit 102. The interface chip U21 sends the left and right channel audio data from the external audio playback device to the audio signal processing unit 102 for processing.

[0062] After receiving the audio signal sent by the external audio playback device through the audio interface unit 101, the audio signal processing unit 102 performs FFT (Fast Fourier Transform) processing on it to extract the frequency and amplitude values ​​from the audio data. Then, it sends the frequency and amplitude values ​​to the lighting effect control unit 103 so that the lighting effect control unit can control the lighting effects. The audio signal processing unit 102 can use an existing audio signal processing chip, such as... Figure 3 As shown, the audio signal processing chip U17 can be an AB136D chip. The AB136D chip is a 32-bit MCU based on the RISC-V architecture with a maximum clock frequency of 120MHz. It has built-in USB peripherals and audio DAC differential signal output, which can meet the audio signal processing requirements in the embodiments of this application.

[0063] After receiving the frequency and amplitude values ​​of the audio signal, the lighting effect control unit 103 generates a left-channel lighting effect control signal based on the frequency and amplitude values ​​of the left-channel audio signal. This left-channel lighting effect control signal reflects the changes in the audio signal. The control unit then sends this signal to the left-channel lighting effect unit 104 to control the lighting effect corresponding to the left channel. Similarly, the lighting effect control unit 103 generates a right-channel lighting effect control signal based on the frequency and amplitude values ​​of the right-channel audio signal. This right-channel lighting effect control signal reflects the changes in the audio signal. The control unit then sends this signal to the right-channel lighting effect unit 105 to control the lighting effect corresponding to the right channel. It should be noted that in this embodiment, the audio signal processing unit 102 and the lighting effect control unit 103 can be configured with different circuit structures, or they can be integrated on the same chip for processing. For example, both can be processed using an AB136D chip. In this embodiment, a shared chip is used as an example for illustration.

[0064] The circuit structures of the left channel lighting unit 104 and the right channel lighting unit 105 are identical, and they are used to control the lighting effects according to the left channel lighting control signal and the right channel lighting control signal, respectively. The left channel lighting unit 104 and the right channel lighting unit 105 each contain LED lights, and the color and brightness of the LED lights can change with the change of the lighting effect control signal.

[0065] In this embodiment, in addition to controlling the lighting effects based on the audio data of the left and right channels, it is also necessary to ensure the audio playback effect. This embodiment further includes an audio amplification unit 106, a left channel speaker 107, and a right channel speaker 108. The audio amplification unit 106 receives the audio signal processed by the audio signal processing unit 102. The audio signal processing unit 102 processes the audio data sent by the external playback device to generate a left channel audio signal and a right channel audio signal. The left channel audio signal is amplified and sent to the left channel speaker 107, and the right channel audio signal is amplified and sent to the right channel speaker 108. This ensures both audio playback and control of the lighting effects.

[0066] In summary, this application embodiment, by adding an audio interface unit, directly receives audio signals from an external audio playback device, ensuring the accuracy and high quality of the audio signals and effectively eliminating the influence of noise. At the same time, it also enables the control of the lighting effects of the right channel lighting unit through the right channel lighting effect control signal, so that the lighting effects can jump according to the sound of different channels, improving the user experience.

[0067] In order to enable the audio lighting effect control circuit to meet the user's requirements to the greatest extent, in the embodiments of this application, such as Figure 1 As shown, the audio lighting effect control circuit also includes an audio acquisition unit 109; the audio acquisition unit 109 is electrically connected to the audio signal processing unit 102 and is used to acquire sound signals. The audio signal processing unit 102 converts the acquired sound signals and sends them to an external audio playback device through the audio interface unit 101.

[0068] Figure 3 The circuit diagram of the audio acquisition unit 109 is shown. Figure 3 In the audio acquisition unit 109, a microphone U22, a first voltage divider resistor R23, a second voltage divider resistor R24, and a first filter capacitor C15 are included. The microphone U22 can be an AMF-O97L45-DB pickup, including positive and negative terminals. Figure 3In this configuration, one end of the first voltage divider resistor R23 is connected to the power supply VCC, and the other end of the first voltage divider resistor R23 is electrically connected to the positive terminal of the microphone U22 and the second voltage divider resistor R24, respectively. The other end of the second voltage divider resistor R24 ​​is electrically connected to the negative terminal of the microphone U22 and then grounded. The positive terminal of the microphone U22 is electrically connected to the audio signal processing unit 102 through the first filter capacitor C15. The positive pin 1 of the microphone U22 is connected to the pins PF0 / MICP and PF1 / MICN of the audio signal processing chip U17 through the first filter capacitor C15. After receiving the audio signal collected by the microphone U22, the audio signal processing chip U17 sends the audio signal to an external audio playback device through the audio interface unit 101.

[0069] In this embodiment, the audio acquisition unit 109 is mainly used for sound pickup. This is completely different from the prior art, which uses a microphone to collect audio and control lighting effects. This application uses the audio interface unit 101 to acquire audio data and control the lighting effects of the left and right channels. This can reduce the impact of noise on the one hand, and also realize the separate control of the lighting effects of the left and right channels on the other hand.

[0070] Continue to refer to Figure 3 In the audio acquisition unit 109, to ensure the stability of the audio signal processing chip U17 and the operation of the audio acquisition unit 109, in this embodiment, the audio acquisition unit 109 further includes a diode D2, a ferrite bead L1, and a second filter capacitor C16; the positive terminal of the diode D2 is connected to the power supply, and the negative terminal of the diode D2 is connected to one end of the ferrite bead L1; the other end of the ferrite bead L1 is electrically connected to one end of the first voltage divider resistor R23 and one end of the second filter capacitor C16; the other end of the second filter capacitor C16 is grounded.

[0071] The power supply can be a +5V power supply. The power is input to the ferrite bead L1 via diode D2, and after filtering by capacitor C16, VCC is obtained, which powers the audio signal processing chip U17. Diode D2 prevents reverse connection of the power supply from damaging the audio signal processing chip U17. Meanwhile, Figure 3 In the audio signal processing chip U17, the VCC is also grounded through capacitors C6 and C17, which can smooth the power supply and filter power supply noise.

[0072] exist Figure 3In this configuration, the USBDP and USBDM pins of the audio signal processing chip U17 are connected to the DP and DN pins of the interface chip U21. The LEFT_LED_CTRL pin of the audio signal processing chip U17 is used to output the left channel lighting effect control signal, and the RIGHT_LED_CTRL pin is used to output the right channel lighting effect control signal. The L_DAC pin of the audio signal processing chip U17 is used to send the left channel audio signal to the audio amplification unit 106, and the R_DAC pin is used to send the right channel audio signal to the audio amplification unit 106.

[0073] Figure 4 The circuit structure diagram of the left channel lighting unit 104 or the right channel lighting unit 105 proposed in the embodiments of this application is shown. Since the left channel lighting unit 104 and the right channel lighting unit 105 have the same structure, the only difference is that the left channel lighting control unit 103 is connected to the LEFT_LED_CTRL pin of the audio signal processing chip U17, and the right channel lighting control unit 103 is connected to the RIGHT_LED_CTRL pin of the audio signal processing chip U17. In this embodiment, only the circuit structure of the left channel lighting control unit 103 is described as an example.

[0074] Figure 4 In the above, the left channel lighting unit 104 includes: a lighting control circuit: a current-limiting resistor R18, a lighting control chip U1, and LEDs; one end of the current-limiting resistor R18 is electrically connected to the lighting control unit 103, and the other end is electrically connected to the input terminal DIN of the lighting control chip U1, for receiving the left channel lighting control signal or the right channel lighting control signal sent by the lighting control unit 103; the positive terminal of the LED is connected to the power supply, and after multiple LEDs are connected in series, the negative terminal is electrically connected to the output terminal OUT of the lighting control chip U1.

[0075] The lighting control chip U1 can be controlled by a WS2811 chip, which can control multiple LEDs simultaneously. In actual use, the number of LEDs can be configured as needed.

[0076] Furthermore, in order to achieve better lighting effect control, the left channel lighting effect unit 104 or the right channel lighting effect unit 105 respectively includes multiple lighting effect control chips U1 and multiple LEDs; each of the lighting effect control chips U1 is connected to each of the LEDs respectively; each of the lighting effect control chips U1 is cascaded with each other through the input terminal DIN and the output terminal DO respectively.

[0077] Cascading of WS2811 chips is achieved through their DIN (data input) and DO (data output) pins. This cascading method allows a single microcontroller to control multiple LEDs via a single-wire protocol, thus achieving complex lighting effects. The WS2811 chips use a single-wire data transmission protocol; data signals are sent from the controller's GPIO pins to the DIN pin of the first WS2811 chip. After the first chip processes the data, it transmits the remaining data signals through the DO pin to the DIN pin of the next chip, and so on, until the last chip. Cascading allows for efficient control of multiple LEDs, achieving better lighting control effects.

[0078] Furthermore, to improve the driving capability of the left and right channel lighting units, enabling them to drive more LEDs, the left channel lighting unit 104 and right channel lighting unit 105 proposed in this embodiment of the application each further include a boost circuit, such as... Figure 4 As shown, the boost circuit includes a boost module U3, a third voltage divider resistor R27, and a fourth voltage divider resistor R28. The power output terminal SW of the boost module U3 is connected to the positive terminal of the LED. The sampling feedback terminal VFB of the boost module U3 is connected to one end of the third voltage divider resistor R27 and the fourth voltage divider resistor R28, respectively. The other end of the fourth voltage divider resistor R28 is connected to the positive terminal of the LED. The other end of the third voltage divider resistor R27 is grounded.

[0079] refer to Figure 4 The boost circuit includes a boost module U3, a pre-stage filter capacitor C18, a power inductor L2, a freewheeling diode D5, a current-limiting resistor R26, a third voltage divider resistor R27, a fourth voltage divider resistor R28, a first output filter capacitor C19, and a second output filter capacitor C20. The boost module U3 can be an H6391. Pin 1 (EN) of the boost module U3 is the chip enable pin, connected to VDD_5V for normal chip operation. Pin 2 (VDD) is the chip power supply pin, connected to the input power supply VDD_5V. The current-limiting resistor R26 is connected to ground after the CS pin of U3 for overcurrent protection. The L2 power inductor is connected to the positive terminal of the input power supply VDD_5V and the power output pin SW. Pin 6, the power output terminal SW, is connected to the positive terminal of freewheeling diode D5. One end of resistor R28 is connected to the negative terminal of freewheeling diode D5, and the other end is connected in series with resistor R27 to ground. The voltage divider node of R28 and R27 is connected to pin 4, the sampling feedback terminal VFB, of U3 for sampling feedback. Different output voltage values ​​can be adjusted by changing the ratio of resistors R28 and R27. The first output filter capacitor C19 and the second output filter capacitor C20 are used to filter high-frequency harmonic interference, making the output voltage more stable.

[0080] By setting up a boost circuit, the power supply voltage of the left and right channel lighting units is increased, which reduces the total output current while driving a larger number of LEDs, thus saving the number of lighting control chips.

[0081] Furthermore, the LED lights may also include red LED lights, green LED lights, and blue LED lights; the positive terminal of the red LED light is connected to the power supply, and the negative terminal is electrically connected to the first output terminal OUTR of the lighting effect control chip; the positive terminal of the green LED light is connected to the power supply, and the negative terminal is electrically connected to the second output terminal OUTG of the lighting effect control chip; the positive terminal of the blue LED light is connected to the power supply, and the negative terminal is electrically connected to the third output terminal OUTB of the lighting effect control chip. The WS2811 can use single-wire communication to input the duty cycle signal of the three LED lights to control the three LED lights, achieving constant current control. Pin 6 of the WS2811 is the signal input pin, and pin 5 is the cascaded signal output pin. Pins 1, 2, and 3 are the LED adjustable constant current output pins, namely the first output terminal OUTR, the second output terminal OUTG, and the third output terminal OUTB; pin 8 is the power supply pin, connected to the power supply terminal of the boost module U3 via a pull-up resistor; and pin 4 is the GND pin, grounded. The current-limiting resistor R18 limits the current of the main control output signal.

[0082] Continue to refer to Figure 5 The diagram shows the circuit structure of an audio amplification unit 106, which includes a first adjustable resistor U23, a second adjustable resistor U24, and a dual-channel audio amplifier U18. One end of the first adjustable resistor U23 is electrically connected to an audio signal processing unit 102 for receiving the left channel audio signal. The adjustable end of the first adjustable resistor U23 is electrically connected to the first audio input terminal 1IN+ of the dual-channel audio amplifier U18. The other end of the first adjustable resistor U23 is grounded. One end of the second adjustable resistor U24 is electrically connected to the audio signal processing unit 102 for receiving the right channel audio signal. The adjustable end of the second adjustable resistor U24 is electrically connected to the second audio input terminal 2IN+ of the dual-channel audio amplifier U18. The other end of the second adjustable resistor U24 is grounded. The first audio output terminal 1OUT of the dual-channel audio amplifier U18 is electrically connected to the left channel speaker 107U19. The second audio output terminal 2OUT of the dual-channel audio amplifier is electrically connected to the right channel speaker 108U20.

[0083] One end of the first adjustable resistor U23 is connected to the L_DAC pin of the audio signal processing chip U17 to receive the left channel audio signal; one end of the second adjustable resistor U24 is connected to the R_DAC pin of the audio signal processing chip U17 to receive the left channel audio signal. By adjusting the position of the middle sliding contact through the first adjustable resistor U23 and the second adjustable resistor U24, according to the voltage divider principle, the volume gain input to the power amplifier chip can be adjusted. Moving the contact upwards increases the volume, and moving it downwards decreases the volume.

[0084] The dual-channel audio amplifier U18 can use a TDA2822M chip, including left and right channel signal inputs, and makes volume gain adjustment easier through the first adjustable resistor U23 and the second adjustable resistor U24.

[0085] Another embodiment of this application provides an audio playback device, which includes the audio lighting effect control circuit described in the above embodiment. The audio lighting effect control circuit is used to be electrically connected to an external audio playback device and to control the lighting effect according to the audio signal sent by the external audio playback device.

[0086] In summary, the audio lighting effect control circuit and audio playback device proposed in this application directly process the audio signal played by the external audio playback device through an audio interface unit, ensuring the accuracy and high quality of the audio signal and effectively removing noise. The lighting effect of the right channel lighting unit is controlled by the right channel lighting effect control information signal, allowing the lighting effect to change according to the sound of different channels. Furthermore, the power supply to the left and right channel lighting units is boosted, increasing the number of LEDs while reducing the total current of the cascaded LED strips and the number of lighting effect control chips required. Through these methods, the accuracy of lighting effect control is improved, the total current of the cascaded LED strips is reduced, and the lighting effect is controlled separately according to the sound of different channels, thus improving the user experience.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An audio lighting effect control circuit, characterized in that, include: Audio interface unit, audio signal processing unit, lighting effect control unit, left channel lighting effect unit, right channel lighting effect unit, audio amplification unit, left channel speaker and right channel speaker; The audio interface unit is used to connect to an external audio playback device and receive audio signals sent by the external audio playback device; The audio signal processing unit is connected to the audio interface unit and receives the audio signal, and sends the frequency value and amplitude value of the audio signal to the lighting effect control unit; The lighting effect control unit receives the frequency and amplitude values ​​of the audio signal, sends a left channel lighting effect control signal to the left channel lighting effect unit so that the left channel lighting effect unit controls the lighting effect; and sends a right channel lighting effect control signal to the right channel lighting effect unit so that the right channel lighting effect unit controls the lighting effect. The audio amplification unit is electrically connected to the audio signal processing unit and is used to acquire the left channel audio signal and the right channel audio signal output by the audio signal processing unit; it is also used to amplify the left channel audio signal and send it to the left channel speaker, and amplify the right channel audio signal and send it to the right channel speaker.

2. The audio lighting effect control circuit according to claim 1, characterized in that, It also includes an audio acquisition unit; The audio acquisition unit is electrically connected to the audio signal processing unit and is used to acquire sound signals. The audio signal processing unit converts the acquired sound signals and sends them to the external audio playback device through the audio interface unit.

3. The audio lighting effect control circuit according to claim 2, characterized in that, The audio acquisition unit includes a microphone, a first voltage divider resistor, a second voltage divider resistor, and a first filter capacitor; One end of the first voltage divider resistor is connected to the power supply, and the other end of the first voltage divider resistor is electrically connected to the positive terminal of the microphone and one end of the second voltage divider resistor, respectively. The other end of the second voltage divider resistor is electrically connected to the negative terminal of the microphone and then grounded; The positive terminal of the microphone is electrically connected to the audio signal processing unit through the first filter capacitor.

4. The audio lighting effect control circuit according to claim 3, characterized in that, The audio acquisition unit also includes a diode, a ferrite bead, and a second filter capacitor; The positive terminal of the diode is connected to the power supply, and the negative terminal of the diode is connected to one end of the magnetic bead; The other end of the magnetic bead is electrically connected to one end of the first voltage divider resistor and one end of the second filter capacitor, respectively. The other end of the second filter capacitor is grounded.

5. The audio lighting effect control circuit according to claim 1, characterized in that, The audio interface unit is a USB interface or a Type-C interface.

6. The audio lighting effect control circuit according to claim 1, characterized in that, The left channel lighting unit or the right channel lighting unit includes: a current-limiting resistor, a lighting control chip, and an LED light; One end of the current-limiting resistor is electrically connected to the lighting effect control unit, and the other end is electrically connected to the input terminal of the lighting effect control chip; The lighting effect control chip is used to receive the left channel lighting effect control signal or the right channel lighting effect control signal sent by the lighting effect control unit; The positive terminal of the LED is connected to the power supply, and the negative terminal is electrically connected to the output terminal of the lighting effect control chip.

7. The audio lighting effect control circuit according to claim 6, characterized in that, The left channel lighting unit and the right channel lighting unit also include: a boost circuit; The boost circuit includes a boost module, a third voltage divider resistor, and a fourth voltage divider resistor. The power output terminal of the boost module is connected to the positive terminal of the LED. The sampling feedback terminal of the boost module is connected to one end of the third voltage divider resistor and one end of the fourth voltage divider resistor. The other end of the fourth voltage divider resistor is connected to the positive terminal of the LED. The other end of the third voltage divider resistor is grounded.

8. The audio lighting effect control circuit according to claim 7, characterized in that, The left channel lighting unit or the right channel lighting unit respectively includes multiple lighting control chips and multiple LEDs; Each of the aforementioned lighting effect control chips is connected to each of the aforementioned LED lights respectively; Each of the aforementioned lighting effect control chips is cascaded with each other through its input and output terminals.

9. The audio lighting effect control circuit according to claim 1, characterized in that, The audio amplification unit includes: a first adjustable resistor, a second adjustable resistor, and a dual-channel audio amplifier; One end of the first adjustable resistor is electrically connected to the audio signal processing unit for receiving the left channel audio signal; the adjustable end of the first adjustable resistor is electrically connected to the first audio input terminal of the dual-channel audio amplifier; the other end of the first adjustable resistor is grounded. One end of the second adjustable resistor is electrically connected to the audio signal processing unit for receiving the right channel audio signal; the adjustable end of the second adjustable resistor is electrically connected to the second audio input terminal of the dual-channel audio amplifier; the other end of the second adjustable resistor is grounded. The first audio output terminal of the dual-channel audio amplifier is electrically connected to the left channel speaker. The second audio output terminal of the dual-channel audio amplifier is electrically connected to the right channel speaker.

10. An audio playback device, characterized in that, The system includes an audio lighting effect control circuit as described in any one of claims 1-9, wherein the audio lighting effect control circuit is electrically connected to an external audio playback device and performs lighting effect control according to the audio signal sent by the external audio playback device.

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