CN220123054U - Bluetooth sound circuit of parallelly connected LED light source and bluetooth sound - Google Patents
Bluetooth sound circuit of parallelly connected LED light source and bluetooth sound Download PDFInfo
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- CN220123054U CN220123054U CN202320389826.6U CN202320389826U CN220123054U CN 220123054 U CN220123054 U CN 220123054U CN 202320389826 U CN202320389826 U CN 202320389826U CN 220123054 U CN220123054 U CN 220123054U
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Abstract
The utility model relates to the technical field of power amplification circuits, and discloses a Bluetooth sound circuit with parallel LED light sources, which has low manufacturing cost, and comprises: a low power driving module (100) for receiving an audio signal inputted from a front stage; the input end of the main control module (110) is coupled with the output end of the low-power driving module (100) and is used for receiving an audio signal, carrying out on-state impedance processing on the input audio signal and correspondingly outputting trigger pulses according to the input audio signal; the input end of the audio amplification module (130) is connected with the output end of the main control module (110) and is used for receiving the audio signals and trigger pulses, amplifying the input audio signals, outputting the amplified audio signals through a loudspeaker, and the LED light source, wherein one end of the LED light source is connected with the output end of the audio amplification module (130) and is used for receiving the trigger pulses which are used for triggering the LED light source.
Description
Technical Field
The utility model relates to the technical field of power amplification circuits, in particular to a Bluetooth sound circuit with parallel LED light sources and a Bluetooth sound.
Background
The sound box is common to us, and is a device for converting an audio signal into sound, and the sound is played back by the sound box after the audio signal is amplified, so that the sound becomes loud. At present, a digital power amplifier is an amplifier with a power amplifying stage in a completely switched state, adopts a digital signal processing mode on a pre-stage, adopts an existing digital audio processing integrated circuit after simulating audio signals or digital audio signals to be input, completes sound field processing, digital delay and reverberation, and then stops audio amplification through a power amplifying module.
However, in the existing bluetooth sound equipment, a high-power driving module is required to drive the sound unit and the LED lamp module simultaneously, and the driving module with high power is expensive to purchase, so that the production cost of the product is high, and the product popularization is not facilitated.
Disclosure of Invention
The utility model aims to solve the technical problems that aiming at the existing Bluetooth sound equipment in the prior art, a high-power driving module is needed to drive a sound generating unit and an LED lamp module simultaneously, and the manufacturing cost of the product is high due to the fact that the high-power driving module is expensive, and provides a Bluetooth sound equipment circuit with parallel LED light sources and a Bluetooth sound equipment with low manufacturing cost.
The technical scheme adopted for solving the technical problems is as follows: a Bluetooth sound circuit for constructing a parallel LED light source is provided with:
the low-power driving module is configured in the Bluetooth sound circuit and is used for receiving the audio signal input by the front stage;
the input end of the main control module is coupled with the output end of the low-power driving module, and is used for receiving the audio signal, carrying out on-state impedance processing on the input audio signal and correspondingly outputting trigger pulse according to the input audio signal;
the input end of the audio amplification module is connected with the output end of the main control module and is used for receiving the audio signal and the trigger pulse,
the audio amplifying module amplifies the input audio signal, the amplified audio signal is output through a loudspeaker,
one end of the LED light source is connected with the output end of the audio amplifying module and used for receiving the trigger pulse, and the trigger pulse is used for triggering the LED light source.
In some embodiments, the low power drive module includes a driver,
an audio input of the driver is for receiving an audio signal from a previous stage,
the input end of the main control module is connected with the output end of the driver and is used for receiving the audio signal.
In some embodiments, the low power drive module further comprises a first capacitor and a first resistor connected in series,
one end of the first capacitor is connected with a signal end of the driver,
one end of the first resistor is connected with the common end.
In some embodiments, the master control module comprises a master controller,
the input end of the main controller is coupled with the output end of the driver and is used for receiving the audio signal output by the driver and carrying out on-state impedance processing on the input audio signal,
the input end of the audio amplification module is connected with the output end of the main controller and is used for receiving the audio signal and the trigger pulse after the on-state impedance processing.
In some embodiments, the audio amplification module includes an amplifier,
the input end of the amplifier is connected with the output end of the main controller and is used for receiving the audio signal and the trigger pulse and amplifying the input audio signal and the trigger pulse,
the output end of the amplifier is connected with one end of the LED light source, and the LED light source is used for receiving the trigger pulse.
In some embodiments, a filter circuit is also included,
one end of the filter circuit is connected with the output end of the main control module, and the input audio signal and the trigger pulse are filtered by the filter circuit;
the input end of the audio amplifying module is coupled with the other end of the filter circuit.
In some implementations, the filter circuit includes a tenth resistor and a twelfth capacitor connected in series,
one end of the tenth resistor is connected with the output end of the main control module,
one end of the twelfth capacitor is connected with the input end of the audio amplifying module.
In some embodiments, a bluetooth sound device comprises a bluetooth sound circuit with any of the above-described parallel LED light sources.
The Bluetooth sound circuit with the parallel LED light sources comprises a low-power driving module, a main control module, an audio amplifying module and an LED light source, wherein the low-power driving module is used for receiving an audio signal input by a front stage, the main control module is used for receiving the audio signal, carrying out on-state impedance processing on the input audio signal and correspondingly outputting a trigger pulse according to the input audio signal; the audio amplifying module is used for receiving the audio signal and the trigger pulse, one end of the LED light source is connected with the output end of the audio amplifying module and used for receiving the trigger pulse, and the trigger pulse is used for triggering the LED light source. Compared with the prior art, through low power drive module and main control module cooperation use, when guaranteeing output audio quality, still can correspond output trigger pulse according to audio signal, and the trigger pulse is used to trigger the LED light source again, uses this technical scheme, can reduce the manufacturing cost of stereo set, need not to adopt high-power drive LED light source, adopts parallelly connected miniwatt drive alone to drive the speaker.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic circuit diagram of an embodiment of a bluetooth sound circuit of the present utility model that provides parallel LED light sources.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings.
As shown in fig. 1, in a first embodiment of the bluetooth sound circuit with parallel LED light sources according to the present utility model, a bluetooth sound circuit 10 with parallel LED light sources includes a low power driving module 100, a main control module 110, a filter circuit 120, and an audio amplifying module 130.
The low power driving module 100 is configured to amplify a signal input by a pre-stage circuit (e.g., amplify a signal of the pre-stage circuit to enable the signal to drive a power transistor or a switching transistor).
The main control module 110 has a bluetooth module, logic operation, command control, on-state impedance, low noise, and improved total harmonic distortion characteristics.
The filtering circuit 120 is used for filtering interference in the audio signal to improve the quality of the audio signal.
The audio amplifying module 130 is configured to amplify an input audio signal, provide a sufficiently large current driving capability to a sound output element (speaker), and implement power amplification so that the volume and power level reproduce the audio input signal at the sound output element (speaker) with high efficiency and low distortion.
Specifically, the low-power driving module 100 is configured in the bluetooth sound circuit, and is configured to receive an audio signal input from a previous stage, perform primary amplification on the input audio signal, and output the audio signal to the main control module 110.
For example, the low power driving module 100 is composed of a triangle wave generator, a comparator, a power output stage and an LC low pass filter.
The input audio signal and the triangular wave signal with the frequency much higher than that of the input audio signal are modulated by a comparator to obtain a PWM modulation signal with the duty ratio in direct proportion to the amplitude of the input signal, the PWM modulation signal pushes an output power tube to work in a switching state, an output signal with the constant duty ratio is obtained at the output end of the power tube, and the amplitude of the output signal is power supply voltage and has strong current driving capability.
The output signal contains both the input signal and the fundamental component of the modulated triangular wave, as well as their higher harmonics and combinations thereof, after signal modulation.
After LC low-pass filtering, the high-frequency component in the output signal is filtered, and a low-frequency signal with the same frequency as the original audio signal and amplified amplitude is obtained on the main control module 110.
The input end of the main control module 110 is coupled to the output end of the low power driving module 100, and is configured to receive an audio signal, perform on-state impedance processing on the input audio signal, and correspondingly output a trigger pulse according to the input audio signal.
Specifically, an on-state impedance is used for an input audio signal to prevent an increase in the total harmonic distortion ratio, thereby realizing a low distortion ratio, an improved sound quality, and a low noise.
Meanwhile, the main control module 110 correspondingly outputs a trigger pulse with a high level or a low level according to the input audio signal, and outputs the audio signal and the trigger pulse after the on-state impedance processing to the audio amplifying module 130.
The input end of the audio amplifying module 130 is connected to the output end of the main control module 110, for receiving the audio signal and the trigger pulse,
the audio amplifying module 130 amplifies the input audio signal, and the amplified audio signal is output through a speaker.
It is understood that the audio amplifying module 130 is a rear amplifying section.
One end (anode) of the LED light source is connected to the output end of the audio amplifying module 130, for receiving the trigger pulse, and the input trigger pulse is used for triggering the LED light source.
By using the technical scheme, the low-power driving module 100 is matched with the main control module 110 for use, so that the audio quality is ensured, meanwhile, the triggering pulse can be correspondingly output according to the audio signal, and then the triggering pulse is used for triggering the LED light source, so that the manufacturing cost of the loudspeaker can be reduced, the high-power driving LED light source is not required, and the parallel low-power driving is adopted for independently driving the loudspeaker.
In some embodiments, to improve the performance of the bluetooth sound circuit, a driver U101 may be provided in the low power driving module 100, wherein the driver U101 has a signal amplifying effect.
Specifically, an audio input terminal (corresponding to 7 pins) of the driver U101 is connected to an output terminal of the front stage circuit, and is configured to receive an audio signal input from the front stage, and perform a first-stage amplification process on the input audio signal.
The input end of the main control module 110 is connected with the output end (corresponding to 5 pins) of the driver U101, and is used for receiving the audio signal output by the driver U101.
In some embodiments, to improve the safety of the operation of the driver U101, a first capacitor C101 and a first resistor R101 connected in series may be disposed in the low power driving module 100; and
A second capacitor C102 and a second resistor R102 connected in series; and
And a third capacitor C103 and a third resistor R103 connected in series.
The first capacitor C101, the second capacitor C102 and the third capacitor C103 provide a path for the high-frequency signal by utilizing the characteristic that the higher the frequency of the passing signal is, the lower the capacitive reactance is, so that the spike voltage can be converted into heat to be consumed on the resistor, and the buffer effect is achieved for the driver U101.
One end of the first capacitor C101 is connected to a signal end (corresponding to pin 1) of the driver U101,
one end of the first resistor R101 is connected with the common end;
one end of the second capacitor C102 is connected to a signal end (corresponding to pin 2) of the driver U101,
one end of the second resistor R102 is connected with the common end;
one end of the third capacitor C103 is connected to a signal terminal (corresponding to 3 pins) of the driver U101,
one end of the third resistor R103 is connected to the common terminal.
In some embodiments, to improve the reliability of the bluetooth sound circuit operation, a master U102 may be disposed in the master module 110, where the master U102 has logic operation, command control, on-state impedance, low noise and improved total harmonic distortion characteristics, and a bluetooth module is embedded for short-range wireless communication.
Specifically, the main controller U102 integrates a multifunctional digital audio signal processing function, has high performance and high fidelity, and is an all-digital PWM modulator, and can be used for realizing on-state impedance processing of audio signals, low noise processing, audio signal compensation, loudspeaker response and parametric equalization;
the sampling frequencies of the received digital serial audio data are 32kHz, 44.1kHz, 48kHz and 96kHz.
Specifically, the input end (corresponding to 14 pins) of the main controller U102 is connected to the output end (corresponding to 5 pins) of the driver U101 through a fourth capacitor C104, and the audio signal output by the driver U101 is input to the main controller U102 through the fourth capacitor C104, which performs on-state impedance processing on the input audio signal and correspondingly outputs a trigger pulse (corresponding to a high level signal) according to the input audio signal.
Further, the input end of the audio amplifying module 130 is connected to the output end (corresponding to 10 pins) of the main controller U102, and is configured to receive the audio signal and the trigger pulse after the on-state impedance processing.
In some embodiments, in order to improve the quality of the output audio signal, an amplifier U103 may be provided at the audio amplifying module 130, which has a signal amplifying effect.
The input end of the amplifier U103 is connected with the output end (corresponding to 10 pins) of the main controller U102 through an adjustable resistor RS1, the amplifier U103 is used for receiving the audio signal and the trigger pulse and amplifying the input audio signal and the trigger pulse,
the output end of the amplifier U103 is connected with one end (corresponding to the positive electrode) of the LED light source through a loudspeaker, and the input trigger pulse is used for triggering the LED light source.
That is, the amplifier U103 outputs the amplified audio signal through the speaker, and an LED light source is disposed on an output loop of the speaker, when the speaker works, a trigger pulse output from the speaker is input to an anode of the LED light source, and then flows through a public terminal through a cathode of the LED light source, and when the speaker works, the LED light source is also controlled to be turned on, so that the high-power driving LED light source is not required, and the parallel low-power driving is adopted to independently drive the speaker, so that the driving of the LED light source can be completed.
In some embodiments, to improve the reliability of the output audio signal and the trigger pulse, a filter circuit 120 may be provided in the circuit, which has a filtering effect.
Specifically, one end of the filter circuit 120 is connected with the output end of the main control module 110, and the input audio signal and trigger pulse are filtered by the filter circuit 120;
the input end of the audio amplifying module 130 is coupled to the other end of the filter circuit 120.
In some embodiments, the filter circuit 120 includes a tenth resistor R110 and a twelfth capacitor C112 connected in series, an
A tenth capacitor C110 and an eleventh capacitor C111 connected in series, wherein a tenth resistor R110 and a twelfth capacitor C112 connected in series are connected in parallel with the tenth capacitor C110 and the eleventh capacitor C111 connected in series.
In some cases, one end of the tenth resistor R110 is connected to the output end of the main control module 110, and one end of the twelfth capacitor C112 is connected to the input end of the audio amplifying module 130.
In some embodiments, a bluetooth sound comprises a bluetooth sound circuit of the above-described parallel LED light sources.
The embodiments of the present utility model have been described above with reference to the accompanying drawings, but the present utility model is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present utility model and the scope of the claims, which are to be protected by the present utility model.
Claims (8)
1. A Bluetooth sound circuit with parallel LED light sources is characterized by comprising:
the low-power driving module is configured in the Bluetooth sound circuit and is used for receiving the audio signal input by the front stage;
the input end of the main control module is coupled with the output end of the low-power driving module, and is used for receiving the audio signal, carrying out on-state impedance processing on the input audio signal and correspondingly outputting trigger pulse according to the input audio signal;
the input end of the audio amplification module is connected with the output end of the main control module and is used for receiving the audio signal and the trigger pulse,
the audio amplifying module amplifies the input audio signal, the amplified audio signal is output through a loudspeaker,
one end of the LED light source is connected with the output end of the audio amplifying module and used for receiving the trigger pulse, and the trigger pulse is used for triggering the LED light source.
2. The bluetooth sound circuit of a parallel LED light source of claim 1,
the low power drive module includes a driver,
an audio input of the driver is for receiving an audio signal from a previous stage,
the input end of the main control module is connected with the output end of the driver and is used for receiving the audio signal.
3. The bluetooth sound circuit of a parallel LED light source of claim 2,
the low power driving module further comprises a first capacitor and a first resistor connected in series,
one end of the first capacitor is connected with a signal end of the driver,
one end of the first resistor is connected with the common end.
4. A Bluetooth sound circuit with parallel LED light sources as claimed in claim 3, wherein,
the main control module comprises a main controller and a control unit,
the input end of the main controller is coupled with the output end of the driver and is used for receiving the audio signal output by the driver and carrying out on-state impedance processing on the input audio signal,
the input end of the audio amplification module is connected with the output end of the main controller and is used for receiving the audio signal and the trigger pulse after the on-state impedance processing.
5. The Bluetooth sound circuit of parallel LED light source of claim 4,
the audio amplification module comprises an amplifier,
the input end of the amplifier is connected with the output end of the main controller and is used for receiving the audio signal and the trigger pulse and amplifying the input audio signal and the trigger pulse,
the output end of the amplifier is connected with one end of the LED light source, and the LED light source is used for receiving the trigger pulse.
6. The bluetooth sound circuit of a parallel LED light source of claim 1,
also included is a filter circuit that is configured to filter the light,
one end of the filter circuit is connected with the output end of the main control module, and the input audio signal and the trigger pulse are filtered by the filter circuit;
the input end of the audio amplifying module is coupled with the other end of the filter circuit.
7. The Bluetooth sound circuit of parallel LED light source of claim 6,
the filter circuit includes a tenth resistor and a twelfth capacitor connected in series,
one end of the tenth resistor is connected with the output end of the main control module,
one end of the twelfth capacitor is connected with the input end of the audio amplifying module.
8. A bluetooth sound comprising a bluetooth sound circuit of parallel LED light sources according to any of claims 1-7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320389826.6U CN220123054U (en) | 2023-03-06 | 2023-03-06 | Bluetooth sound circuit of parallelly connected LED light source and bluetooth sound |
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| CN202320389826.6U CN220123054U (en) | 2023-03-06 | 2023-03-06 | Bluetooth sound circuit of parallelly connected LED light source and bluetooth sound |
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| CN220123054U true CN220123054U (en) | 2023-12-01 |
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| CN202320389826.6U Active CN220123054U (en) | 2023-03-06 | 2023-03-06 | Bluetooth sound circuit of parallelly connected LED light source and bluetooth sound |
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| CN (1) | CN220123054U (en) |
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